diff --git a/.prettierignore b/.prettierignore
index 14e68779..b1bcc99c 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -2,3 +2,7 @@ node_modules
 dist
 runtime-scripts
 *.min.js
+
+# Vendored third-party sources — reformatting them would destroy the diff against upstream,
+# which is the only thing that makes a checked-in library reviewable. See the README beside it.
+src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.mjs
diff --git a/src/servers/sidecar/jellyfin/routes.ts b/src/servers/sidecar/jellyfin/routes.ts
index 4b2137ec..9c7fb67d 100644
--- a/src/servers/sidecar/jellyfin/routes.ts
+++ b/src/servers/sidecar/jellyfin/routes.ts
@@ -261,17 +261,49 @@ function transcodeQuality(source: MediaSource): { videoBitrate: number; maxWidth
   return { videoBitrate: ENCODE_BITRATE, maxWidth: ENCODE_MAX_WIDTH };
 }
 
+/**
+ * Fix up the HLS URL Jellyfin handed back so it carries the same quality decision as the progressive one.
+ *
+ * `TranscodingUrl` is built by the server from our `DeviceProfile`, which is why it is taken rather than
+ * reinvented: it already carries the segment container, the audio codec list, the play session and the
+ * transcode reasons, and every one of those is the server's business rather than ours. What it gets wrong for
+ * this machine is exactly two values — it resolves `VideoBitrate` from `MaxStreamingBitrate` (~119 Mbit, the
+ * ceiling that exists to let a stream COPY through) and never sets a width. For a file that can be copied that
+ * is right. For a file that must be re-encoded it asks a CPU-only container to encode 4K, which cannot keep up
+ * with playback. So those two are overwritten from `transcodeQuality`, and nothing else is touched.
+ *
+ * Verified against a real answer from this server: the URL comes back with `VideoBitrate=119616000` and no
+ * width, on an item whose transcode reason was `ContainerNotSupported` alone.
+ */
+function hlsPath(source: MediaSource): string {
+  const sanitized = sanitizeUpstreamPath(source.TranscodingUrl!);
+  const [path, search = ''] = sanitized.split('?');
+  const params = new URLSearchParams(search);
+  const quality = transcodeQuality(source);
+
+  // Jellyfin's own casing here is PascalCase, and its query parsing is case-insensitive — but a duplicate key
+  // under a different case would still be two values, so delete before setting rather than trusting that.
+  for (const key of [...params.keys()]) {
+    const lower = key.toLowerCase();
+    if (lower === 'videobitrate' || lower === 'maxwidth' || lower === 'maxheight') params.delete(key);
+  }
+  params.set('VideoBitrate', String(quality.videoBitrate));
+  if (quality.maxWidth) params.set('MaxWidth', String(quality.maxWidth));
+
+  return `${path}?${params.toString()}`;
+}
+
 /**
  * Build the PROGRESSIVE transcode URL — one continuous mp4 the `<video>` element can play with no library.
  *
- * This is the deliberate fallback instead of HLS, and the reason is a dependency this repo does not have:
- * Chromium cannot play an HLS playlist natively, so the m3u8 path needs hls.js, and `bunfig.toml` freezes
- * installs precisely so a new package is a considered act rather than a side effect of a feature. A
- * progressive stream needs nothing.
+ * This is the FALLBACK now, not the primary: the player prefers `hlsUrl`, whose playlist covers the whole
+ * runtime and therefore seeks properly. This path stays for the browser that cannot do MSE at all (iOS
+ * Safari's native HLS covers itself, but a stripped-down webview may have neither), and it is why the plan
+ * still carries a plain `url`.
  *
  * What it costs is honest and worth stating: a live transcode has no length and no byte ranges, so the
  * browser cannot seek it. The player seeks by asking for a NEW stream at an offset — which is what
- * `startTimeTicks` is for here, and why the UI re-requests playback on every scrub.
+ * `startTimeTicks` is for here, and why the UI re-requests playback on every scrub when it falls back here.
  *
  * `allowVideoStreamCopy` is what keeps this cheap for the common case. An mkv whose video is already h264
  * gets REMUXED, not re-encoded: the container changes, the video bytes are copied. That matters on this
@@ -313,8 +345,9 @@ function progressivePath(id: string, source: MediaSource, playSessionId: string
  * the fly, still `/Videos/{id}/stream`) and transcode. They are reported explicitly rather than inferred,
  * because "why is my CPU pinned" is a question the UI should be able to answer.
  *
- * `hlsUrl` is returned alongside whenever Jellyfin offered one. Nothing consumes it yet — it is what the
- * player switches to the day hls.js is added on purpose, and it costs nothing to carry until then.
+ * `hlsUrl` is returned alongside whenever Jellyfin offered one, and is what the player actually uses for a
+ * transcode — hls.js is vendored for it (`apps/Jellyfin/vendor/`). `url` remains the progressive fallback for
+ * a browser with no MSE, so both are carried and the player chooses.
  */
 async function playbackInfo(cfg: UpstreamConfig, id: string, req: Request, url: URL): Promise<Response> {
   const startSeconds = Number(url.searchParams.get('startSeconds') ?? '0');
@@ -384,8 +417,9 @@ async function playbackInfo(cfg: UpstreamConfig, id: string, req: Request, url:
     // A direct file is byte-range seekable; a live transcode is not, and the player has to restart the stream
     // at an offset instead. This flag is the difference, and it is the one thing the player cannot guess.
     seekable: direct,
-    // Carried, not used. The day hls.js is a deliberate dependency, the player switches to this.
-    hlsUrl: source.TranscodingUrl ? `/_jf${sanitizeUpstreamPath(source.TranscodingUrl)}` : null,
+    // The seekable form of a transcode: the playlist spans the whole runtime, so a scrub is a segment request
+    // rather than a new ffmpeg. Preferred by the player whenever it is present and MSE is available.
+    hlsUrl: source.TranscodingUrl ? `/_jf${hlsPath(source)}` : null,
     playSessionId,
     mediaSourceId: source.Id ?? null,
     mediaSource: source,
diff --git a/src/workspaces/officerdev/src/apps/Jellyfin/VideoPlayer.tsx b/src/workspaces/officerdev/src/apps/Jellyfin/VideoPlayer.tsx
index d2635d71..8bb7754a 100644
--- a/src/workspaces/officerdev/src/apps/Jellyfin/VideoPlayer.tsx
+++ b/src/workspaces/officerdev/src/apps/Jellyfin/VideoPlayer.tsx
@@ -1,5 +1,5 @@
 import type { PlaybackPlan } from './shared';
-import { useCallback, useEffect, useRef, useState } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { Link, useLocation, useSearchParams } from 'react-router';
 import { Loader2, Maximize2, Pause, Play, X } from 'lucide-react';
 import { useClient } from 'hooks/useClient';
@@ -13,23 +13,40 @@ import {
   ticksToSeconds,
 } from './shared';
 import { useJellyfinItem, usePlaybackPlan, usePlaystateReporter } from './useJellyfinData';
+import Hls from './vendor/hls.mjs';
 
 // The player — a full-panel overlay opened by `?play=<id>`.
 //
-// THE ONE THING THAT MAKES THIS DIFFERENT FROM A NORMAL <video>: a transcoded stream has no length and no byte
-// ranges, so the browser cannot seek it. `plan.seekable` says which world we are in, and the two are handled
-// differently rather than pretended to be the same:
+// THE ONE THING THAT MAKES THIS DIFFERENT FROM A NORMAL <video>: what the server hands back is not always a
+// file. There are three transports, and `mode` names which one is in use rather than letting the difference
+// leak out as mysterious behaviour:
 //
-//   direct play / direct stream → a real file. Native controls, native seeking, `currentTime` is the position.
-//   transcode                   → a live progressive mp4 starting at an offset. Seeking means asking the
-//                                 server for a NEW stream at a new offset, so the position is
-//                                 `offset + currentTime` and the scrubber is ours.
+//   file        — direct play or direct stream. A real byte-range resource; native controls, native seeking,
+//                 `currentTime` is the position.
+//   hls-mse     — a transcode, driven by the vendored hls.js over Media Source Extensions. A real timeline
+//                 too: Jellyfin's playlist is VOD and spans the whole runtime, so a scrub is a segment
+//                 request and the server moves its ffmpeg to that point.
+//   progressive — the fallback for a browser without MSE. One endless mp4 with no length and no ranges, so
+//                 the browser CANNOT seek it: seeking means asking the server for a NEW stream at an offset,
+//                 the position is `startSeconds + currentTime`, and the scrubber has to be ours.
 //
-// Every progress report uses that same computed position, which is why resume points are correct in both
-// modes instead of being wrong by the offset in one of them.
+// Only that last mode is the odd one, and `hasTimeline` is the single flag every other decision here reads.
+//
+// Safari plays an m3u8 natively and is deliberately NOT given one. Segment URIs inside the playlist are
+// relative, so they inherit the playlist's path but not its `?token=` — every segment would come back 401,
+// and Safari cannot set an Authorization header the way hls.js can. Where hls.js runs (including iOS 17.1+,
+// via Managed Media Source) it is used; where it does not, progressive is the honest fallback.
 
 const PROGRESS_INTERVAL_MS = 10_000;
 
+type Mode = 'file' | 'hls-mse' | 'progressive';
+
+function transportFor(plan: PlaybackPlan): Mode {
+  if (plan.seekable) return 'file';
+  if (plan.hlsUrl && Hls.isSupported()) return 'hls-mse';
+  return 'progressive';
+}
+
 export const VideoPlayer = ({ id }: { id: string }) => {
   const { token } = useClient();
   const { pathname } = useLocation();
@@ -51,6 +68,8 @@ export const VideoPlayer = ({ id }: { id: string }) => {
   const positionRef = useRef(0);
   const startedRef = useRef(false);
 
+  const mode = useMemo(() => (plan ? transportFor(plan) : null), [plan]);
+  const hasTimeline = mode !== null && mode !== 'progressive';
   const duration = plan?.runtimeSeconds ?? ticksToSeconds(item?.RunTimeTicks);
 
   const sendReport = useCallback(
@@ -69,7 +88,7 @@ export const VideoPlayer = ({ id }: { id: string }) => {
     [id, report],
   );
 
-  /** Open (or re-open) the stream at an offset. A seek in transcode mode is exactly this call. */
+  /** Open (or re-open) the stream at an offset. In progressive mode a seek is exactly this call. */
   const open = useCallback(
     async (startSeconds: number) => {
       // Tell the server the previous session ended before starting another, or its ffmpeg keeps running and
@@ -97,6 +116,39 @@ export const VideoPlayer = ({ id }: { id: string }) => {
     void open(ticksToSeconds(item.UserData?.PlaybackPositionTicks));
   }, [item, open]);
 
+  // hls.js owns the element's buffer in `hls-mse` mode, so the element gets no `src` at all — attaching one
+  // alongside MSE is how you get two sources fighting over the same video.
+  //
+  // The credential goes on as a header rather than in the URL because hls.js fetches every segment itself:
+  // segment URIs are RELATIVE to the playlist, so a `?token=` on the playlist would not survive onto them.
+  // `xhrSetup` runs before hls.js opens the request and it skips its own `open` if one already happened,
+  // which is what makes setting a header here possible at all.
+  useEffect(() => {
+    const video = videoRef.current;
+    if (mode !== 'hls-mse' || !plan?.hlsUrl || !video) return;
+
+    const hls = new Hls({
+      startPosition: plan.startSeconds > 0 ? plan.startSeconds : -1,
+      xhrSetup: (xhr, url) => {
+        xhr.open('GET', url, true);
+        if (token) xhr.setRequestHeader('Authorization', `Bearer ${token}`);
+      },
+    });
+
+    // Non-fatal errors are hls.js's normal weather and it recovers from them itself. A fatal one is worth one
+    // attempt at the documented recovery for its kind before giving the player back to the user as broken.
+    hls.on(Hls.Events.ERROR, (_event, data) => {
+      if (!data.fatal) return;
+      if (data.type === Hls.ErrorTypes.NETWORK_ERROR) hls.startLoad();
+      else if (data.type === Hls.ErrorTypes.MEDIA_ERROR) hls.recoverMediaError();
+      else setError('The stream stopped unexpectedly.');
+    });
+
+    hls.loadSource(`/api/jellyfin${plan.hlsUrl}`);
+    hls.attachMedia(video);
+    return () => hls.destroy();
+  }, [mode, plan, token]);
+
   // The stop report, on the way out. Also the only place the server learns a transcode is no longer wanted.
   useEffect(
     () => () => {
@@ -115,8 +167,8 @@ export const VideoPlayer = ({ id }: { id: string }) => {
   const onTimeUpdate = () => {
     const video = videoRef.current;
     if (!video || !plan) return;
-    // In transcode mode the element's clock starts at zero for a stream that begins mid-film.
-    const next = plan.seekable ? video.currentTime : plan.startSeconds + video.currentTime;
+    // Only progressive starts the element's clock at zero for a stream that begins mid-film.
+    const next = hasTimeline ? video.currentTime : plan.startSeconds + video.currentTime;
     positionRef.current = next;
     setPosition(next);
   };
@@ -124,7 +176,7 @@ export const VideoPlayer = ({ id }: { id: string }) => {
   const seek = (seconds: number) => {
     const video = videoRef.current;
     const clamped = Math.max(0, duration ? Math.min(seconds, duration - 1) : seconds);
-    if (plan?.seekable && video) {
+    if (hasTimeline && video) {
       video.currentTime = clamped;
       return;
     }
@@ -138,6 +190,10 @@ export const VideoPlayer = ({ id }: { id: string }) => {
     else video.pause();
   };
 
+  // `src` for everything except MSE, where hls.js feeds the element instead. The key remounts the element when
+  // the source genuinely changes — which in progressive mode is every scrub.
+  const source = plan && mode !== 'hls-mse' ? streamUrl(plan.url, token) : null;
+
   const close = closeHref(pathname, params, PLAY_PARAM);
   const title = item ? episodeLabel(item) : '';
 
@@ -167,14 +223,14 @@ export const VideoPlayer = ({ id }: { id: string }) => {
           </div>
         ) : plan ? (
           <video
-            key={plan.url}
+            key={mode === 'hls-mse' ? (plan.hlsUrl ?? plan.url) : plan.url}
             ref={videoRef}
-            src={streamUrl(plan.url, token)}
+            src={source ?? undefined}
             className="h-full w-full"
             autoPlay
-            // A direct file is seekable, so the browser's own controls are correct and better than ours.
-            // A live transcode is not, and its controls would show a scrubber that does nothing.
-            controls={plan.seekable}
+            // A real timeline means the browser's own controls are correct, and better than ours. Progressive
+            // has none, and native controls there would show a scrubber that does nothing.
+            controls={hasTimeline}
             onTimeUpdate={onTimeUpdate}
             onPlay={() => {
               setPaused(false);
@@ -185,7 +241,9 @@ export const VideoPlayer = ({ id }: { id: string }) => {
               sendReport('progress', true);
             }}
             onEnded={() => sendReport('stopped')}
-            onError={() => setError('The stream stopped unexpectedly.')}
+            // hls.js reports its own errors through the ERROR event, and sets a MediaError on the element for
+            // ones it is already recovering from — so in MSE mode this handler would fire on the recoverable.
+            onError={() => mode !== 'hls-mse' && setError('The stream stopped unexpectedly.')}
           />
         ) : (
           <div className="flex h-full items-center justify-center text-white/60">
@@ -194,7 +252,7 @@ export const VideoPlayer = ({ id }: { id: string }) => {
         )}
       </div>
 
-      {plan && !plan.seekable && !error && (
+      {plan && !hasTimeline && !error && (
         <div className="flex items-center gap-3 px-3 py-2 text-white">
           <button type="button" onClick={togglePlay} aria-label={paused ? 'Play' : 'Pause'} className="shrink-0">
             {paused ? <Play className="h-4 w-4" fill="currentColor" /> : <Pause className="h-4 w-4" />}
diff --git a/src/workspaces/officerdev/src/apps/Jellyfin/vendor/README.md b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/README.md
new file mode 100644
index 00000000..f8fd9316
--- /dev/null
+++ b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/README.md
@@ -0,0 +1,51 @@
+# Vendored hls.js
+
+`hls.mjs` is **hls.js 1.6.16**, checked in rather than installed.
+
+## Why it is here and not in `package.json`
+
+Chromium cannot play an HLS playlist natively, so seeking inside a live Jellyfin transcode needs a player
+library. `bunfig.toml` freezes installs (`frozenLockfile = true`) specifically so that adding a package is a
+deliberate act with a reviewed lockfile diff — see `platform/CLAUDE.md` → "Installs are frozen", and the
+2026-08-04 npm cache-package worm that prompted it.
+
+Vendoring makes the trade explicit instead of implicit:
+
+- **No install-time code.** A committed file has no `preinstall`/`postinstall` hook, which is the exact vector
+  that compromise used. hls.js's own tarball has no install script either — but a future version of it, or of
+  anything it might later depend on, could.
+- **No transitive tree.** hls.js 1.6.16 publishes `dependencies: {}`, `peerDependencies: {}` and
+  `optionalDependencies: {}`, so nothing is being skipped by not resolving it. Its *build-time* devDependencies
+  do reach the affected packages (eslint 8 → file-entry-cache → flat-cache → keyv), but this artifact was
+  published 2026-04-13, months before those versions existed.
+- **It is reviewable.** One unminified file in the diff. That is the point; do not replace it with a minified
+  build to save bytes.
+
+The upstream `.d.ts` is *not* vendored — it imports a tree of internal type modules, which would undo the one
+file rule. `hls.d.mts` next to it declares the API this player actually uses, by hand.
+
+## Provenance
+
+| | |
+|---|---|
+| Package | `hls.js@1.6.16` |
+| Published | 2026-04-13 |
+| Tarball | `https://registry.npmjs.org/hls.js/-/hls.js-1.6.16.tgz` |
+| Tarball sha512 | `VSIRpLfRwlAAdGL4wiTucx2ScRipo0ed1FBatWkyt832jC4CReKstga6yIhYVwGu9LOBjuX9wzmRMeQdBJtzEA==` (matches the registry's published `dist.integrity`) |
+| Extracted from | `package/dist/hls.mjs` |
+| Local change | the trailing `//# sourceMappingURL=hls.mjs.map` line removed — the map is not vendored, and leaving the reference makes devtools 404 |
+| `hls.mjs` sha256 | `45a4bb55e5346bf9284fa7e46b6fac7d62dce5b90394dcba9747d471940fea6e` as published; `ca442f1f963ff66607a242cc7be227b243770d86bfc3251bf675f8a342dfe798` as committed here (the two differ only by that removed line) |
+| Licence | Apache-2.0 — `hls.LICENSE` |
+
+## Updating it
+
+```sh
+V=1.6.17
+curl -sO https://registry.npmjs.org/hls.js/-/hls.js-$V.tgz
+# compare the sha512 against `curl -s https://registry.npmjs.org/hls.js/$V | jq -r .dist.integrity`
+tar xzf hls.js-$V.tgz package/dist/hls.mjs package/LICENSE
+```
+
+Copy `package/dist/hls.mjs` over this one, drop the `sourceMappingURL` line, update the table above, and read
+the diff. A version bump that arrives with a diff you did not read is the thing this directory exists to
+prevent.
diff --git a/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.LICENSE b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.LICENSE
new file mode 100644
index 00000000..5123bda0
--- /dev/null
+++ b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.LICENSE
@@ -0,0 +1,28 @@
+Copyright (c) 2017 Dailymotion (http://www.dailymotion.com)
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+src/remux/mp4-generator.js and src/demux/exp-golomb.ts implementation in this project
+are derived from the HLS library for video.js (https://github.com/videojs/videojs-contrib-hls)
+
+That work is also covered by the Apache 2 License, following copyright:
+Copyright (c) 2013-2015 Brightcove
+
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.d.mts b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.d.mts
new file mode 100644
index 00000000..f197c3f2
--- /dev/null
+++ b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.d.mts
@@ -0,0 +1,63 @@
+// Hand-written declarations for the vendored `hls.mjs`.
+//
+// Deliberately narrow: it declares the API this player actually calls, not hls.js's full surface. The upstream
+// `.d.ts` is not vendored because it pulls in a tree of internal type modules, and the point of vendoring was
+// to have ONE reviewable file. Anything added to the player that hls.js supports but this file does not gets
+// declared here, in the open, rather than cast away at the call site.
+
+export type HlsErrorData = {
+  fatal: boolean;
+  type: string;
+  details: string;
+  reason?: string;
+  error?: Error;
+};
+
+export type HlsLevel = { height?: number; width?: number; bitrate?: number };
+
+export type HlsConfig = {
+  /** Where playback begins, in seconds. -1 means "the start", which is not the same as 0 for a live edge. */
+  startPosition?: number;
+  /** Called before `xhr.open`, so it may open the request itself and then set headers on it. */
+  xhrSetup?: (xhr: XMLHttpRequest, url: string) => void;
+  enableWorker?: boolean;
+  lowLatencyMode?: boolean;
+  maxBufferLength?: number;
+  maxMaxBufferLength?: number;
+  backBufferLength?: number;
+};
+
+declare class Hls {
+  constructor(config?: HlsConfig);
+
+  static isSupported(): boolean;
+  static readonly Events: {
+    MANIFEST_PARSED: string;
+    LEVEL_LOADED: string;
+    ERROR: string;
+    MEDIA_ATTACHED: string;
+  };
+  static readonly ErrorTypes: {
+    NETWORK_ERROR: string;
+    MEDIA_ERROR: string;
+    KEY_SYSTEM_ERROR: string;
+    MUX_ERROR: string;
+    OTHER_ERROR: string;
+  };
+
+  loadSource(url: string): void;
+  attachMedia(media: HTMLMediaElement): void;
+  detachMedia(): void;
+  startLoad(startPosition?: number): void;
+  stopLoad(): void;
+  recoverMediaError(): void;
+  destroy(): void;
+
+  on(event: string, listener: (event: string, data: HlsErrorData) => void): void;
+  off(event: string, listener?: (event: string, data: HlsErrorData) => void): void;
+
+  readonly levels: HlsLevel[];
+  currentLevel: number;
+}
+
+export default Hls;
diff --git a/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.mjs b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.mjs
new file mode 100644
index 00000000..f7391bf7
--- /dev/null
+++ b/src/workspaces/officerdev/src/apps/Jellyfin/vendor/hls.mjs
@@ -0,0 +1,36705 @@
+// https://caniuse.com/mdn-javascript_builtins_number_isfinite
+const isFiniteNumber = Number.isFinite || function (value) {
+  return typeof value === 'number' && isFinite(value);
+};
+
+// https://caniuse.com/mdn-javascript_builtins_number_issafeinteger
+const isSafeInteger = Number.isSafeInteger || function (value) {
+  return typeof value === 'number' && Math.abs(value) <= MAX_SAFE_INTEGER;
+};
+const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER || 9007199254740991;
+
+let ErrorTypes = /*#__PURE__*/function (ErrorTypes) {
+  // Identifier for a network error (loading error / timeout ...)
+  ErrorTypes["NETWORK_ERROR"] = "networkError";
+  // Identifier for a media Error (video/parsing/mediasource error)
+  ErrorTypes["MEDIA_ERROR"] = "mediaError";
+  // EME (encrypted media extensions) errors
+  ErrorTypes["KEY_SYSTEM_ERROR"] = "keySystemError";
+  // Identifier for a mux Error (demuxing/remuxing)
+  ErrorTypes["MUX_ERROR"] = "muxError";
+  // Identifier for all other errors
+  ErrorTypes["OTHER_ERROR"] = "otherError";
+  return ErrorTypes;
+}({});
+let ErrorDetails = /*#__PURE__*/function (ErrorDetails) {
+  ErrorDetails["KEY_SYSTEM_NO_KEYS"] = "keySystemNoKeys";
+  ErrorDetails["KEY_SYSTEM_NO_ACCESS"] = "keySystemNoAccess";
+  ErrorDetails["KEY_SYSTEM_NO_SESSION"] = "keySystemNoSession";
+  ErrorDetails["KEY_SYSTEM_NO_CONFIGURED_LICENSE"] = "keySystemNoConfiguredLicense";
+  ErrorDetails["KEY_SYSTEM_LICENSE_REQUEST_FAILED"] = "keySystemLicenseRequestFailed";
+  ErrorDetails["KEY_SYSTEM_SERVER_CERTIFICATE_REQUEST_FAILED"] = "keySystemServerCertificateRequestFailed";
+  ErrorDetails["KEY_SYSTEM_SERVER_CERTIFICATE_UPDATE_FAILED"] = "keySystemServerCertificateUpdateFailed";
+  ErrorDetails["KEY_SYSTEM_SESSION_UPDATE_FAILED"] = "keySystemSessionUpdateFailed";
+  ErrorDetails["KEY_SYSTEM_STATUS_OUTPUT_RESTRICTED"] = "keySystemStatusOutputRestricted";
+  ErrorDetails["KEY_SYSTEM_STATUS_INTERNAL_ERROR"] = "keySystemStatusInternalError";
+  ErrorDetails["KEY_SYSTEM_DESTROY_MEDIA_KEYS_ERROR"] = "keySystemDestroyMediaKeysError";
+  ErrorDetails["KEY_SYSTEM_DESTROY_CLOSE_SESSION_ERROR"] = "keySystemDestroyCloseSessionError";
+  ErrorDetails["KEY_SYSTEM_DESTROY_REMOVE_SESSION_ERROR"] = "keySystemDestroyRemoveSessionError";
+  // Identifier for a manifest load error - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["MANIFEST_LOAD_ERROR"] = "manifestLoadError";
+  // Identifier for a manifest load timeout - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["MANIFEST_LOAD_TIMEOUT"] = "manifestLoadTimeOut";
+  // Identifier for a manifest parsing error - data: { url : faulty URL, reason : error reason}
+  ErrorDetails["MANIFEST_PARSING_ERROR"] = "manifestParsingError";
+  // Identifier for a manifest with only incompatible codecs error - data: { url : faulty URL, reason : error reason}
+  ErrorDetails["MANIFEST_INCOMPATIBLE_CODECS_ERROR"] = "manifestIncompatibleCodecsError";
+  // Identifier for a level which contains no fragments - data: { url: faulty URL, reason: "no fragments found in level", level: index of the bad level }
+  ErrorDetails["LEVEL_EMPTY_ERROR"] = "levelEmptyError";
+  // Identifier for a level load error - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["LEVEL_LOAD_ERROR"] = "levelLoadError";
+  // Identifier for a level load timeout - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["LEVEL_LOAD_TIMEOUT"] = "levelLoadTimeOut";
+  // Identifier for a level parse error - data: { url : faulty URL, error: Error, reason: error message }
+  ErrorDetails["LEVEL_PARSING_ERROR"] = "levelParsingError";
+  // Identifier for a level switch error - data: { level : faulty level Id, event : error description}
+  ErrorDetails["LEVEL_SWITCH_ERROR"] = "levelSwitchError";
+  // Identifier for an audio track load error - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["AUDIO_TRACK_LOAD_ERROR"] = "audioTrackLoadError";
+  // Identifier for an audio track load timeout - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["AUDIO_TRACK_LOAD_TIMEOUT"] = "audioTrackLoadTimeOut";
+  // Identifier for a subtitle track load error - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["SUBTITLE_LOAD_ERROR"] = "subtitleTrackLoadError";
+  // Identifier for a subtitle track load timeout - data: { url : faulty URL, response : { code: error code, text: error text }}
+  ErrorDetails["SUBTITLE_TRACK_LOAD_TIMEOUT"] = "subtitleTrackLoadTimeOut";
+  // Identifier for fragment load error - data: { frag : fragment object, response : { code: error code, text: error text }}
+  ErrorDetails["FRAG_LOAD_ERROR"] = "fragLoadError";
+  // Identifier for fragment load timeout error - data: { frag : fragment object}
+  ErrorDetails["FRAG_LOAD_TIMEOUT"] = "fragLoadTimeOut";
+  // Identifier for a fragment decryption error event - data: {id : demuxer Id,frag: fragment object, reason : parsing error description }
+  ErrorDetails["FRAG_DECRYPT_ERROR"] = "fragDecryptError";
+  // Identifier for a fragment parsing error event - data: { id : demuxer Id, reason : parsing error description }
+  // will be renamed DEMUX_PARSING_ERROR and switched to MUX_ERROR in the next major release
+  ErrorDetails["FRAG_PARSING_ERROR"] = "fragParsingError";
+  // Identifier for a fragment or part load skipped because of a GAP tag or attribute
+  ErrorDetails["FRAG_GAP"] = "fragGap";
+  // Identifier for a remux alloc error event - data: { id : demuxer Id, frag : fragment object, bytes : nb of bytes on which allocation failed , reason : error text }
+  ErrorDetails["REMUX_ALLOC_ERROR"] = "remuxAllocError";
+  // Identifier for decrypt key load error - data: { frag : fragment object, response : { code: error code, text: error text }}
+  ErrorDetails["KEY_LOAD_ERROR"] = "keyLoadError";
+  // Identifier for decrypt key load timeout error - data: { frag : fragment object}
+  ErrorDetails["KEY_LOAD_TIMEOUT"] = "keyLoadTimeOut";
+  // Triggered when an exception occurs while adding a sourceBuffer to MediaSource - data : { error : exception , mimeType : mimeType }
+  ErrorDetails["BUFFER_ADD_CODEC_ERROR"] = "bufferAddCodecError";
+  // Triggered when source buffer(s) could not be created using level (manifest CODECS attribute), parsed media, or best guess codec(s) - data: { reason : error reason }
+  ErrorDetails["BUFFER_INCOMPATIBLE_CODECS_ERROR"] = "bufferIncompatibleCodecsError";
+  // Identifier for a buffer append error - data: append error description
+  ErrorDetails["BUFFER_APPEND_ERROR"] = "bufferAppendError";
+  // Identifier for a buffer appending error event - data: appending error description
+  ErrorDetails["BUFFER_APPENDING_ERROR"] = "bufferAppendingError";
+  // Identifier for a buffer stalled error event
+  ErrorDetails["BUFFER_STALLED_ERROR"] = "bufferStalledError";
+  // Identifier for a buffer full event
+  ErrorDetails["BUFFER_FULL_ERROR"] = "bufferFullError";
+  // Identifier for a buffer seek over hole event
+  ErrorDetails["BUFFER_SEEK_OVER_HOLE"] = "bufferSeekOverHole";
+  // Identifier for a buffer nudge on stall (playback is stuck although currentTime is in a buffered area)
+  ErrorDetails["BUFFER_NUDGE_ON_STALL"] = "bufferNudgeOnStall";
+  // Identifier for a Interstitial Asset List load error - data: { url: faulty URL, response: { code: error code, text: error text } }
+  ErrorDetails["ASSET_LIST_LOAD_ERROR"] = "assetListLoadError";
+  // Identifier for a Interstitial Asset List load timeout - data: { url: faulty URL, response: { code: error code, text: error text } }
+  ErrorDetails["ASSET_LIST_LOAD_TIMEOUT"] = "assetListLoadTimeout";
+  // Identifier for a Interstitial Asset List parsing error - data: { url : faulty URL, reason : error reason, response : { code: error code, text: error text }}
+  ErrorDetails["ASSET_LIST_PARSING_ERROR"] = "assetListParsingError";
+  // Identifier for a Interstitial Asset List parsing error - data: { url : faulty URL, reason : error reason, response : { code: error code, text: error text }}
+  ErrorDetails["INTERSTITIAL_ASSET_ITEM_ERROR"] = "interstitialAssetItemError";
+  // Identifier for an internal exception happening inside hls.js while handling an event
+  ErrorDetails["INTERNAL_EXCEPTION"] = "internalException";
+  // Identifier for an internal call to abort a loader
+  ErrorDetails["INTERNAL_ABORTED"] = "aborted";
+  // Triggered when attachMedia fails
+  ErrorDetails["ATTACH_MEDIA_ERROR"] = "attachMediaError";
+  // Uncategorized error
+  ErrorDetails["UNKNOWN"] = "unknown";
+  return ErrorDetails;
+}({});
+
+let Events = /*#__PURE__*/function (Events) {
+  // Fired before MediaSource is attaching to media element
+  Events["MEDIA_ATTACHING"] = "hlsMediaAttaching";
+  // Fired when MediaSource has been successfully attached to media element
+  Events["MEDIA_ATTACHED"] = "hlsMediaAttached";
+  // Fired before detaching MediaSource from media element
+  Events["MEDIA_DETACHING"] = "hlsMediaDetaching";
+  // Fired when MediaSource has been detached from media element
+  Events["MEDIA_DETACHED"] = "hlsMediaDetached";
+  // Fired when HTMLMediaElement dispatches "ended" event, or stalls at end of VOD program
+  Events["MEDIA_ENDED"] = "hlsMediaEnded";
+  // Fired after playback stall is resolved with playing, seeked, or ended event following BUFFER_STALLED_ERROR
+  Events["STALL_RESOLVED"] = "hlsStallResolved";
+  // Fired when the buffer is going to be reset
+  Events["BUFFER_RESET"] = "hlsBufferReset";
+  // Fired when we know about the codecs that we need buffers for to push into - data: {tracks : { container, codec, levelCodec, initSegment, metadata }}
+  Events["BUFFER_CODECS"] = "hlsBufferCodecs";
+  // fired when sourcebuffers have been created - data: { tracks : tracks }
+  Events["BUFFER_CREATED"] = "hlsBufferCreated";
+  // fired when we append a segment to the buffer - data: { segment: segment object }
+  Events["BUFFER_APPENDING"] = "hlsBufferAppending";
+  // fired when we are done with appending a media segment to the buffer - data : { parent : segment parent that triggered BUFFER_APPENDING, pending : nb of segments waiting for appending for this segment parent}
+  Events["BUFFER_APPENDED"] = "hlsBufferAppended";
+  // fired when the stream is finished and we want to notify the media buffer that there will be no more data - data: { }
+  Events["BUFFER_EOS"] = "hlsBufferEos";
+  // fired when all buffers are full to the end of the program, after calling MediaSource.endOfStream() (unless restricted)
+  Events["BUFFERED_TO_END"] = "hlsBufferedToEnd";
+  // fired when the media buffer should be flushed - data { startOffset, endOffset }
+  Events["BUFFER_FLUSHING"] = "hlsBufferFlushing";
+  // fired when the media buffer has been flushed - data: { }
+  Events["BUFFER_FLUSHED"] = "hlsBufferFlushed";
+  // fired to signal that a manifest loading starts - data: { url : manifestURL}
+  Events["MANIFEST_LOADING"] = "hlsManifestLoading";
+  // fired after manifest has been loaded - data: { levels : [available quality levels], audioTracks : [ available audio tracks ], url : manifestURL, stats : LoaderStats }
+  Events["MANIFEST_LOADED"] = "hlsManifestLoaded";
+  // fired after manifest has been parsed - data: { levels : [available quality levels], firstLevel : index of first quality level appearing in Manifest}
+  Events["MANIFEST_PARSED"] = "hlsManifestParsed";
+  // fired when a level switch is requested - data: { level : id of new level }
+  Events["LEVEL_SWITCHING"] = "hlsLevelSwitching";
+  // fired when a level switch is effective - data: { level : id of new level }
+  Events["LEVEL_SWITCHED"] = "hlsLevelSwitched";
+  // fired when a level playlist loading starts - data: { url : level URL, level : id of level being loaded}
+  Events["LEVEL_LOADING"] = "hlsLevelLoading";
+  // fired when a level playlist loading finishes - data: { details : levelDetails object, level : id of loaded level, stats : LoaderStats }
+  Events["LEVEL_LOADED"] = "hlsLevelLoaded";
+  // fired when a level's details have been updated based on previous details, after it has been loaded - data: { details : levelDetails object, level : id of updated level }
+  Events["LEVEL_UPDATED"] = "hlsLevelUpdated";
+  // fired when a level's PTS information has been updated after parsing a fragment - data: { details : levelDetails object, level : id of updated level, drift: PTS drift observed when parsing last fragment }
+  Events["LEVEL_PTS_UPDATED"] = "hlsLevelPtsUpdated";
+  // fired to notify that levels have changed after removing a level - data: { levels : [available quality levels] }
+  Events["LEVELS_UPDATED"] = "hlsLevelsUpdated";
+  // fired to notify that audio track lists has been updated - data: { audioTracks : audioTracks }
+  Events["AUDIO_TRACKS_UPDATED"] = "hlsAudioTracksUpdated";
+  // fired when an audio track switching is requested - data: { id : audio track id }
+  Events["AUDIO_TRACK_SWITCHING"] = "hlsAudioTrackSwitching";
+  // fired when an audio track switch actually occurs - data: { id : audio track id }
+  Events["AUDIO_TRACK_SWITCHED"] = "hlsAudioTrackSwitched";
+  // fired when an audio track loading starts - data: { url : audio track URL, id : audio track id }
+  Events["AUDIO_TRACK_LOADING"] = "hlsAudioTrackLoading";
+  // fired when an audio track loading finishes - data: { details : levelDetails object, id : audio track id, stats : LoaderStats }
+  Events["AUDIO_TRACK_LOADED"] = "hlsAudioTrackLoaded";
+  // fired when an audio tracks's details have been updated based on previous details, after it has been loaded - data: { details : levelDetails object, id : track id }
+  Events["AUDIO_TRACK_UPDATED"] = "hlsAudioTrackUpdated";
+  // fired to notify that subtitle track lists has been updated - data: { subtitleTracks : subtitleTracks }
+  Events["SUBTITLE_TRACKS_UPDATED"] = "hlsSubtitleTracksUpdated";
+  // fired to notify that subtitle tracks were cleared as a result of stopping the media
+  Events["SUBTITLE_TRACKS_CLEARED"] = "hlsSubtitleTracksCleared";
+  // fired when an subtitle track switch occurs - data: { id : subtitle track id }
+  Events["SUBTITLE_TRACK_SWITCH"] = "hlsSubtitleTrackSwitch";
+  // fired when a subtitle track loading starts - data: { url : subtitle track URL, id : subtitle track id }
+  Events["SUBTITLE_TRACK_LOADING"] = "hlsSubtitleTrackLoading";
+  // fired when a subtitle track loading finishes - data: { details : levelDetails object, id : subtitle track id, stats : LoaderStats }
+  Events["SUBTITLE_TRACK_LOADED"] = "hlsSubtitleTrackLoaded";
+  // fired when a subtitle  racks's details have been updated based on previous details, after it has been loaded - data: { details : levelDetails object, id : track id }
+  Events["SUBTITLE_TRACK_UPDATED"] = "hlsSubtitleTrackUpdated";
+  // fired when a subtitle fragment has been processed - data: { success : boolean, frag : the processed frag }
+  Events["SUBTITLE_FRAG_PROCESSED"] = "hlsSubtitleFragProcessed";
+  // fired when a set of VTTCues to be managed externally has been parsed - data: { type: string, track: string, cues: [ VTTCue ] }
+  Events["CUES_PARSED"] = "hlsCuesParsed";
+  // fired when a text track to be managed externally is found - data: { tracks: [ { label: string, kind: string, default: boolean } ] }
+  Events["NON_NATIVE_TEXT_TRACKS_FOUND"] = "hlsNonNativeTextTracksFound";
+  // fired when the first timestamp is found - data: { id : demuxer id, initPTS: initPTS, timescale: timescale, frag : fragment object }
+  Events["INIT_PTS_FOUND"] = "hlsInitPtsFound";
+  // fired when a fragment loading starts - data: { frag : fragment object }
+  Events["FRAG_LOADING"] = "hlsFragLoading";
+  // fired when a fragment loading is progressing - data: { frag : fragment object, { trequest, tfirst, loaded } }
+  // FRAG_LOAD_PROGRESS = 'hlsFragLoadProgress',
+  // Identifier for fragment load aborting for emergency switch down - data: { frag : fragment object }
+  Events["FRAG_LOAD_EMERGENCY_ABORTED"] = "hlsFragLoadEmergencyAborted";
+  // fired when a fragment loading is completed - data: { frag : fragment object, payload : fragment payload, stats : LoaderStats }
+  Events["FRAG_LOADED"] = "hlsFragLoaded";
+  // fired when a fragment has finished decrypting - data: { id : demuxer id, frag: fragment object, payload : fragment payload, stats : { tstart, tdecrypt } }
+  Events["FRAG_DECRYPTED"] = "hlsFragDecrypted";
+  // fired when Init Segment has been extracted from fragment - data: { id : demuxer id, frag: fragment object, moov : moov MP4 box, codecs : codecs found while parsing fragment }
+  Events["FRAG_PARSING_INIT_SEGMENT"] = "hlsFragParsingInitSegment";
+  // fired when parsing sei text is completed - data: { id : demuxer id, frag: fragment object, samples : [ sei samples pes ] }
+  Events["FRAG_PARSING_USERDATA"] = "hlsFragParsingUserdata";
+  // fired when parsing id3 is completed - data: { id : demuxer id, frag: fragment object, samples : [ id3 samples pes ] }
+  Events["FRAG_PARSING_METADATA"] = "hlsFragParsingMetadata";
+  // fired when data have been extracted from fragment - data: { id : demuxer id, frag: fragment object, data1 : moof MP4 box or TS fragments, data2 : mdat MP4 box or null}
+  // FRAG_PARSING_DATA = 'hlsFragParsingData',
+  // fired when fragment parsing is completed - data: { id : demuxer id, frag: fragment object }
+  Events["FRAG_PARSED"] = "hlsFragParsed";
+  // fired when fragment remuxed MP4 boxes have all been appended into SourceBuffer - data: { id : demuxer id, frag : fragment object, stats : LoaderStats }
+  Events["FRAG_BUFFERED"] = "hlsFragBuffered";
+  // fired when fragment matching with current media position is changing - data : { id : demuxer id, frag : fragment object }
+  Events["FRAG_CHANGED"] = "hlsFragChanged";
+  // Identifier for a FPS drop event - data: { currentDropped, currentDecoded, totalDroppedFrames }
+  Events["FPS_DROP"] = "hlsFpsDrop";
+  // triggered when FPS drop triggers auto level capping - data: { level, droppedLevel }
+  Events["FPS_DROP_LEVEL_CAPPING"] = "hlsFpsDropLevelCapping";
+  // triggered when maxAutoLevel changes - data { autoLevelCapping, levels, maxAutoLevel, minAutoLevel, maxHdcpLevel }
+  Events["MAX_AUTO_LEVEL_UPDATED"] = "hlsMaxAutoLevelUpdated";
+  // Identifier for an error event - data: { type : error type, details : error details, fatal : if true, hls.js cannot/will not try to recover, if false, hls.js will try to recover,other error specific data }
+  Events["ERROR"] = "hlsError";
+  // fired when hls.js instance starts destroying. Different from MEDIA_DETACHED as one could want to detach and reattach a media to the instance of hls.js to handle mid-rolls for example - data: { }
+  Events["DESTROYING"] = "hlsDestroying";
+  // fired when a decrypt key loading starts - data: { frag : fragment object }
+  Events["KEY_LOADING"] = "hlsKeyLoading";
+  // fired when a decrypt key loading is completed - data: { frag : fragment object, keyInfo : KeyLoaderInfo }
+  Events["KEY_LOADED"] = "hlsKeyLoaded";
+  // deprecated; please use BACK_BUFFER_REACHED - data : { bufferEnd: number }
+  Events["LIVE_BACK_BUFFER_REACHED"] = "hlsLiveBackBufferReached";
+  // fired when the back buffer is reached as defined by the backBufferLength config option - data : { bufferEnd: number }
+  Events["BACK_BUFFER_REACHED"] = "hlsBackBufferReached";
+  // fired after steering manifest has been loaded - data: { steeringManifest: SteeringManifest object, url: steering manifest URL }
+  Events["STEERING_MANIFEST_LOADED"] = "hlsSteeringManifestLoaded";
+  // fired when asset list has begun loading
+  Events["ASSET_LIST_LOADING"] = "hlsAssetListLoading";
+  // fired when a valid asset list is loaded
+  Events["ASSET_LIST_LOADED"] = "hlsAssetListLoaded";
+  // fired when the list of Interstitial Events and Interstitial Schedule is updated
+  Events["INTERSTITIALS_UPDATED"] = "hlsInterstitialsUpdated";
+  // fired when the buffer reaches an Interstitial Schedule boundary (both Primary segments and Interstitial Assets)
+  Events["INTERSTITIALS_BUFFERED_TO_BOUNDARY"] = "hlsInterstitialsBufferedToBoundary";
+  // fired when a player instance for an Interstitial Asset has been created
+  Events["INTERSTITIAL_ASSET_PLAYER_CREATED"] = "hlsInterstitialAssetPlayerCreated";
+  // Interstitial playback started
+  Events["INTERSTITIAL_STARTED"] = "hlsInterstitialStarted";
+  // InterstitialAsset playback started
+  Events["INTERSTITIAL_ASSET_STARTED"] = "hlsInterstitialAssetStarted";
+  // InterstitialAsset playback ended
+  Events["INTERSTITIAL_ASSET_ENDED"] = "hlsInterstitialAssetEnded";
+  // InterstitialAsset playback errored
+  Events["INTERSTITIAL_ASSET_ERROR"] = "hlsInterstitialAssetError";
+  // Interstitial playback ended
+  Events["INTERSTITIAL_ENDED"] = "hlsInterstitialEnded";
+  // Interstitial schedule resumed primary playback
+  Events["INTERSTITIALS_PRIMARY_RESUMED"] = "hlsInterstitialsPrimaryResumed";
+  // Interstitial players dispatch this event when playout limit is reached
+  Events["PLAYOUT_LIMIT_REACHED"] = "hlsPlayoutLimitReached";
+  // Event DateRange cue "enter" event dispatched
+  Events["EVENT_CUE_ENTER"] = "hlsEventCueEnter";
+  return Events;
+}({});
+
+/**
+ * Defines each Event type and payload by Event name. Used in {@link hls.js#HlsEventEmitter} to strongly type the event listener API.
+ */
+
+var PlaylistContextType = {
+  MANIFEST: "manifest",
+  LEVEL: "level",
+  AUDIO_TRACK: "audioTrack",
+  SUBTITLE_TRACK: "subtitleTrack"
+};
+var PlaylistLevelType = {
+  MAIN: "main",
+  AUDIO: "audio",
+  SUBTITLE: "subtitle"
+};
+
+/*
+ * compute an Exponential Weighted moving average
+ * - https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
+ *  - heavily inspired from shaka-player
+ */
+
+class EWMA {
+  //  About half of the estimated value will be from the last |halfLife| samples by weight.
+  constructor(halfLife, estimate = 0, weight = 0) {
+    this.halfLife = void 0;
+    this.alpha_ = void 0;
+    this.estimate_ = void 0;
+    this.totalWeight_ = void 0;
+    this.halfLife = halfLife;
+    // Larger values of alpha expire historical data more slowly.
+    this.alpha_ = halfLife ? Math.exp(Math.log(0.5) / halfLife) : 0;
+    this.estimate_ = estimate;
+    this.totalWeight_ = weight;
+  }
+  sample(weight, value) {
+    const adjAlpha = Math.pow(this.alpha_, weight);
+    this.estimate_ = value * (1 - adjAlpha) + adjAlpha * this.estimate_;
+    this.totalWeight_ += weight;
+  }
+  getTotalWeight() {
+    return this.totalWeight_;
+  }
+  getEstimate() {
+    if (this.alpha_) {
+      const zeroFactor = 1 - Math.pow(this.alpha_, this.totalWeight_);
+      if (zeroFactor) {
+        return this.estimate_ / zeroFactor;
+      }
+    }
+    return this.estimate_;
+  }
+}
+
+/*
+ * EWMA Bandwidth Estimator
+ *  - heavily inspired from shaka-player
+ * Tracks bandwidth samples and estimates available bandwidth.
+ * Based on the minimum of two exponentially-weighted moving averages with
+ * different half-lives.
+ */
+
+class EwmaBandWidthEstimator {
+  constructor(slow, fast, defaultEstimate, defaultTTFB = 100) {
+    this.defaultEstimate_ = void 0;
+    this.minWeight_ = void 0;
+    this.minDelayMs_ = void 0;
+    this.slow_ = void 0;
+    this.fast_ = void 0;
+    this.defaultTTFB_ = void 0;
+    this.ttfb_ = void 0;
+    this.defaultEstimate_ = defaultEstimate;
+    this.minWeight_ = 0.001;
+    this.minDelayMs_ = 50;
+    this.slow_ = new EWMA(slow);
+    this.fast_ = new EWMA(fast);
+    this.defaultTTFB_ = defaultTTFB;
+    this.ttfb_ = new EWMA(slow);
+  }
+  update(slow, fast) {
+    const {
+      slow_,
+      fast_,
+      ttfb_
+    } = this;
+    if (slow_.halfLife !== slow) {
+      this.slow_ = new EWMA(slow, slow_.getEstimate(), slow_.getTotalWeight());
+    }
+    if (fast_.halfLife !== fast) {
+      this.fast_ = new EWMA(fast, fast_.getEstimate(), fast_.getTotalWeight());
+    }
+    if (ttfb_.halfLife !== slow) {
+      this.ttfb_ = new EWMA(slow, ttfb_.getEstimate(), ttfb_.getTotalWeight());
+    }
+  }
+  sample(durationMs, numBytes) {
+    durationMs = Math.max(durationMs, this.minDelayMs_);
+    const numBits = 8 * numBytes;
+    // weight is duration in seconds
+    const durationS = durationMs / 1000;
+    // value is bandwidth in bits/s
+    const bandwidthInBps = numBits / durationS;
+    this.fast_.sample(durationS, bandwidthInBps);
+    this.slow_.sample(durationS, bandwidthInBps);
+  }
+  sampleTTFB(ttfb) {
+    // weight is frequency curve applied to TTFB in seconds
+    // (longer times have less weight with expected input under 1 second)
+    const seconds = ttfb / 1000;
+    const weight = Math.sqrt(2) * Math.exp(-Math.pow(seconds, 2) / 2);
+    this.ttfb_.sample(weight, Math.max(ttfb, 5));
+  }
+  canEstimate() {
+    return this.fast_.getTotalWeight() >= this.minWeight_;
+  }
+  getEstimate() {
+    if (this.canEstimate()) {
+      // console.log('slow estimate:'+ Math.round(this.slow_.getEstimate()));
+      // console.log('fast estimate:'+ Math.round(this.fast_.getEstimate()));
+      // Take the minimum of these two estimates.  This should have the effect of
+      // adapting down quickly, but up more slowly.
+      return Math.min(this.fast_.getEstimate(), this.slow_.getEstimate());
+    } else {
+      return this.defaultEstimate_;
+    }
+  }
+  getEstimateTTFB() {
+    if (this.ttfb_.getTotalWeight() >= this.minWeight_) {
+      return this.ttfb_.getEstimate();
+    } else {
+      return this.defaultTTFB_;
+    }
+  }
+  get defaultEstimate() {
+    return this.defaultEstimate_;
+  }
+  destroy() {}
+}
+
+function _defineProperty(e, r, t) {
+  return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
+    value: t,
+    enumerable: true,
+    configurable: true,
+    writable: true
+  }) : e[r] = t, e;
+}
+function _extends() {
+  return _extends = Object.assign ? Object.assign.bind() : function (n) {
+    for (var e = 1; e < arguments.length; e++) {
+      var t = arguments[e];
+      for (var r in t) ({}).hasOwnProperty.call(t, r) && (n[r] = t[r]);
+    }
+    return n;
+  }, _extends.apply(null, arguments);
+}
+function ownKeys(e, r) {
+  var t = Object.keys(e);
+  if (Object.getOwnPropertySymbols) {
+    var o = Object.getOwnPropertySymbols(e);
+    r && (o = o.filter(function (r) {
+      return Object.getOwnPropertyDescriptor(e, r).enumerable;
+    })), t.push.apply(t, o);
+  }
+  return t;
+}
+function _objectSpread2(e) {
+  for (var r = 1; r < arguments.length; r++) {
+    var t = null != arguments[r] ? arguments[r] : {};
+    r % 2 ? ownKeys(Object(t), true).forEach(function (r) {
+      _defineProperty(e, r, t[r]);
+    }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) {
+      Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
+    });
+  }
+  return e;
+}
+function _toPrimitive(t, r) {
+  if ("object" != typeof t || !t) return t;
+  var e = t[Symbol.toPrimitive];
+  if (void 0 !== e) {
+    var i = e.call(t, r);
+    if ("object" != typeof i) return i;
+    throw new TypeError("@@toPrimitive must return a primitive value.");
+  }
+  return ("string" === r ? String : Number)(t);
+}
+function _toPropertyKey(t) {
+  var i = _toPrimitive(t, "string");
+  return "symbol" == typeof i ? i : i + "";
+}
+
+class Logger {
+  constructor(label, logger) {
+    this.trace = void 0;
+    this.debug = void 0;
+    this.log = void 0;
+    this.warn = void 0;
+    this.info = void 0;
+    this.error = void 0;
+    const lb = `[${label}]:`;
+    this.trace = noop;
+    this.debug = logger.debug.bind(null, lb);
+    this.log = logger.log.bind(null, lb);
+    this.warn = logger.warn.bind(null, lb);
+    this.info = logger.info.bind(null, lb);
+    this.error = logger.error.bind(null, lb);
+  }
+}
+const noop = function noop() {};
+const fakeLogger = {
+  trace: noop,
+  debug: noop,
+  log: noop,
+  warn: noop,
+  info: noop,
+  error: noop
+};
+function createLogger() {
+  return _extends({}, fakeLogger);
+}
+
+// let lastCallTime;
+// function formatMsgWithTimeInfo(type, msg) {
+//   const now = Date.now();
+//   const diff = lastCallTime ? '+' + (now - lastCallTime) : '0';
+//   lastCallTime = now;
+//   msg = (new Date(now)).toISOString() + ' | [' +  type + '] > ' + msg + ' ( ' + diff + ' ms )';
+//   return msg;
+// }
+
+function consolePrintFn(type, id) {
+  const func = self.console[type];
+  return func ? func.bind(self.console, `${id ? '[' + id + '] ' : ''}[${type}] >`) : noop;
+}
+function getLoggerFn(key, debugConfig, id) {
+  return debugConfig[key] ? debugConfig[key].bind(debugConfig) : consolePrintFn(key, id);
+}
+const exportedLogger = createLogger();
+function enableLogs(debugConfig, context, id) {
+  // check that console is available
+  const newLogger = createLogger();
+  if (typeof console === 'object' && debugConfig === true || typeof debugConfig === 'object') {
+    const keys = [
+    // Remove out from list here to hard-disable a log-level
+    // 'trace',
+    'debug', 'log', 'info', 'warn', 'error'];
+    keys.forEach(key => {
+      newLogger[key] = getLoggerFn(key, debugConfig, id);
+    });
+    // Some browsers don't allow to use bind on console object anyway
+    // fallback to default if needed
+    try {
+      newLogger.log(`Debug logs enabled for "${context}" in hls.js version ${"1.6.16"}`);
+    } catch (e) {
+      /* log fn threw an exception. All logger methods are no-ops. */
+      return createLogger();
+    }
+    // global exported logger uses the same functions as new logger without `id`
+    keys.forEach(key => {
+      exportedLogger[key] = getLoggerFn(key, debugConfig);
+    });
+  } else {
+    // Reset global exported logger
+    _extends(exportedLogger, newLogger);
+  }
+  return newLogger;
+}
+const logger = exportedLogger;
+
+function getMediaSource(preferManagedMediaSource = true) {
+  if (typeof self === 'undefined') return undefined;
+  const mms = (preferManagedMediaSource || !self.MediaSource) && self.ManagedMediaSource;
+  return mms || self.MediaSource || self.WebKitMediaSource;
+}
+function isManagedMediaSource(source) {
+  return typeof self !== 'undefined' && source === self.ManagedMediaSource;
+}
+function isCompatibleTrackChange(currentTracks, requiredTracks) {
+  const trackNames = Object.keys(currentTracks);
+  const requiredTrackNames = Object.keys(requiredTracks);
+  const trackCount = trackNames.length;
+  const requiredTrackCount = requiredTrackNames.length;
+  return !trackCount || !requiredTrackCount || trackCount === requiredTrackCount && !trackNames.some(name => requiredTrackNames.indexOf(name) === -1);
+}
+
+// http://stackoverflow.com/questions/8936984/uint8array-to-string-in-javascript/22373197
+// http://www.onicos.com/staff/iz/amuse/javascript/expert/utf.txt
+/* utf.js - UTF-8 <=> UTF-16 convertion
+ *
+ * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
+ * Version: 1.0
+ * LastModified: Dec 25 1999
+ * This library is free.  You can redistribute it and/or modify it.
+ */
+/**
+ * Converts a UTF-8 array to a string.
+ *
+ * @param array - The UTF-8 array to convert
+ *
+ * @returns The string
+ *
+ * @group Utils
+ *
+ * @beta
+ */
+function utf8ArrayToStr(array, exitOnNull = false) {
+  if (typeof TextDecoder !== 'undefined') {
+    const decoder = new TextDecoder('utf-8');
+    const decoded = decoder.decode(array);
+    if (exitOnNull) {
+      // grab up to the first null
+      const idx = decoded.indexOf('\0');
+      return idx !== -1 ? decoded.substring(0, idx) : decoded;
+    }
+    // remove any null characters
+    return decoded.replace(/\0/g, '');
+  }
+  const len = array.length;
+  let c;
+  let char2;
+  let char3;
+  let out = '';
+  let i = 0;
+  while (i < len) {
+    c = array[i++];
+    if (c === 0x00 && exitOnNull) {
+      return out;
+    } else if (c === 0x00 || c === 0x03) {
+      // If the character is 3 (END_OF_TEXT) or 0 (NULL) then skip it
+      continue;
+    }
+    switch (c >> 4) {
+      case 0:
+      case 1:
+      case 2:
+      case 3:
+      case 4:
+      case 5:
+      case 6:
+      case 7:
+        // 0xxxxxxx
+        out += String.fromCharCode(c);
+        break;
+      case 12:
+      case 13:
+        // 110x xxxx   10xx xxxx
+        char2 = array[i++];
+        out += String.fromCharCode((c & 0x1f) << 6 | char2 & 0x3f);
+        break;
+      case 14:
+        // 1110 xxxx  10xx xxxx  10xx xxxx
+        char2 = array[i++];
+        char3 = array[i++];
+        out += String.fromCharCode((c & 0x0f) << 12 | (char2 & 0x3f) << 6 | (char3 & 0x3f) << 0);
+        break;
+    }
+  }
+  return out;
+}
+
+/**
+ *  hex dump helper class
+ */
+
+function arrayToHex(array) {
+  let str = '';
+  for (let i = 0; i < array.length; i++) {
+    let h = array[i].toString(16);
+    if (h.length < 2) {
+      h = '0' + h;
+    }
+    str += h;
+  }
+  return str;
+}
+function hexToArrayBuffer(str) {
+  return Uint8Array.from(str.replace(/^0x/, '').replace(/([\da-fA-F]{2}) ?/g, '0x$1 ').replace(/ +$/, '').split(' ')).buffer;
+}
+
+function getDefaultExportFromCjs (x) {
+	return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
+}
+
+var urlToolkit = {exports: {}};
+
+var hasRequiredUrlToolkit;
+
+function requireUrlToolkit () {
+	if (hasRequiredUrlToolkit) return urlToolkit.exports;
+	hasRequiredUrlToolkit = 1;
+	(function (module, exports) {
+		// see https://tools.ietf.org/html/rfc1808
+
+		(function (root) {
+		  var URL_REGEX =
+		    /^(?=((?:[a-zA-Z0-9+\-.]+:)?))\1(?=((?:\/\/[^\/?#]*)?))\2(?=((?:(?:[^?#\/]*\/)*[^;?#\/]*)?))\3((?:;[^?#]*)?)(\?[^#]*)?(#[^]*)?$/;
+		  var FIRST_SEGMENT_REGEX = /^(?=([^\/?#]*))\1([^]*)$/;
+		  var SLASH_DOT_REGEX = /(?:\/|^)\.(?=\/)/g;
+		  var SLASH_DOT_DOT_REGEX = /(?:\/|^)\.\.\/(?!\.\.\/)[^\/]*(?=\/)/g;
+
+		  var URLToolkit = {
+		    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //
+		    // E.g
+		    // With opts.alwaysNormalize = false (default, spec compliant)
+		    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g
+		    // With opts.alwaysNormalize = true (not spec compliant)
+		    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g
+		    buildAbsoluteURL: function (baseURL, relativeURL, opts) {
+		      opts = opts || {};
+		      // remove any remaining space and CRLF
+		      baseURL = baseURL.trim();
+		      relativeURL = relativeURL.trim();
+		      if (!relativeURL) {
+		        // 2a) If the embedded URL is entirely empty, it inherits the
+		        // entire base URL (i.e., is set equal to the base URL)
+		        // and we are done.
+		        if (!opts.alwaysNormalize) {
+		          return baseURL;
+		        }
+		        var basePartsForNormalise = URLToolkit.parseURL(baseURL);
+		        if (!basePartsForNormalise) {
+		          throw new Error('Error trying to parse base URL.');
+		        }
+		        basePartsForNormalise.path = URLToolkit.normalizePath(
+		          basePartsForNormalise.path
+		        );
+		        return URLToolkit.buildURLFromParts(basePartsForNormalise);
+		      }
+		      var relativeParts = URLToolkit.parseURL(relativeURL);
+		      if (!relativeParts) {
+		        throw new Error('Error trying to parse relative URL.');
+		      }
+		      if (relativeParts.scheme) {
+		        // 2b) If the embedded URL starts with a scheme name, it is
+		        // interpreted as an absolute URL and we are done.
+		        if (!opts.alwaysNormalize) {
+		          return relativeURL;
+		        }
+		        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);
+		        return URLToolkit.buildURLFromParts(relativeParts);
+		      }
+		      var baseParts = URLToolkit.parseURL(baseURL);
+		      if (!baseParts) {
+		        throw new Error('Error trying to parse base URL.');
+		      }
+		      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {
+		        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc
+		        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'
+		        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);
+		        baseParts.netLoc = pathParts[1];
+		        baseParts.path = pathParts[2];
+		      }
+		      if (baseParts.netLoc && !baseParts.path) {
+		        baseParts.path = '/';
+		      }
+		      var builtParts = {
+		        // 2c) Otherwise, the embedded URL inherits the scheme of
+		        // the base URL.
+		        scheme: baseParts.scheme,
+		        netLoc: relativeParts.netLoc,
+		        path: null,
+		        params: relativeParts.params,
+		        query: relativeParts.query,
+		        fragment: relativeParts.fragment,
+		      };
+		      if (!relativeParts.netLoc) {
+		        // 3) If the embedded URL's <net_loc> is non-empty, we skip to
+		        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>
+		        // (if any) of the base URL.
+		        builtParts.netLoc = baseParts.netLoc;
+		        // 4) If the embedded URL path is preceded by a slash "/", the
+		        // path is not relative and we skip to Step 7.
+		        if (relativeParts.path[0] !== '/') {
+		          if (!relativeParts.path) {
+		            // 5) If the embedded URL path is empty (and not preceded by a
+		            // slash), then the embedded URL inherits the base URL path
+		            builtParts.path = baseParts.path;
+		            // 5a) if the embedded URL's <params> is non-empty, we skip to
+		            // step 7; otherwise, it inherits the <params> of the base
+		            // URL (if any) and
+		            if (!relativeParts.params) {
+		              builtParts.params = baseParts.params;
+		              // 5b) if the embedded URL's <query> is non-empty, we skip to
+		              // step 7; otherwise, it inherits the <query> of the base
+		              // URL (if any) and we skip to step 7.
+		              if (!relativeParts.query) {
+		                builtParts.query = baseParts.query;
+		              }
+		            }
+		          } else {
+		            // 6) The last segment of the base URL's path (anything
+		            // following the rightmost slash "/", or the entire path if no
+		            // slash is present) is removed and the embedded URL's path is
+		            // appended in its place.
+		            var baseURLPath = baseParts.path;
+		            var newPath =
+		              baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) +
+		              relativeParts.path;
+		            builtParts.path = URLToolkit.normalizePath(newPath);
+		          }
+		        }
+		      }
+		      if (builtParts.path === null) {
+		        builtParts.path = opts.alwaysNormalize
+		          ? URLToolkit.normalizePath(relativeParts.path)
+		          : relativeParts.path;
+		      }
+		      return URLToolkit.buildURLFromParts(builtParts);
+		    },
+		    parseURL: function (url) {
+		      var parts = URL_REGEX.exec(url);
+		      if (!parts) {
+		        return null;
+		      }
+		      return {
+		        scheme: parts[1] || '',
+		        netLoc: parts[2] || '',
+		        path: parts[3] || '',
+		        params: parts[4] || '',
+		        query: parts[5] || '',
+		        fragment: parts[6] || '',
+		      };
+		    },
+		    normalizePath: function (path) {
+		      // The following operations are
+		      // then applied, in order, to the new path:
+		      // 6a) All occurrences of "./", where "." is a complete path
+		      // segment, are removed.
+		      // 6b) If the path ends with "." as a complete path segment,
+		      // that "." is removed.
+		      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');
+		      // 6c) All occurrences of "<segment>/../", where <segment> is a
+		      // complete path segment not equal to "..", are removed.
+		      // Removal of these path segments is performed iteratively,
+		      // removing the leftmost matching pattern on each iteration,
+		      // until no matching pattern remains.
+		      // 6d) If the path ends with "<segment>/..", where <segment> is a
+		      // complete path segment not equal to "..", that
+		      // "<segment>/.." is removed.
+		      while (
+		        path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length
+		      ) {}
+		      return path.split('').reverse().join('');
+		    },
+		    buildURLFromParts: function (parts) {
+		      return (
+		        parts.scheme +
+		        parts.netLoc +
+		        parts.path +
+		        parts.params +
+		        parts.query +
+		        parts.fragment
+		      );
+		    },
+		  };
+
+		  module.exports = URLToolkit;
+		})(); 
+	} (urlToolkit));
+	return urlToolkit.exports;
+}
+
+var urlToolkitExports = requireUrlToolkit();
+
+class LoadStats {
+  constructor() {
+    this.aborted = false;
+    this.loaded = 0;
+    this.retry = 0;
+    this.total = 0;
+    this.chunkCount = 0;
+    this.bwEstimate = 0;
+    this.loading = {
+      start: 0,
+      first: 0,
+      end: 0
+    };
+    this.parsing = {
+      start: 0,
+      end: 0
+    };
+    this.buffering = {
+      start: 0,
+      first: 0,
+      end: 0
+    };
+  }
+}
+
+var ElementaryStreamTypes = {
+  AUDIO: "audio",
+  VIDEO: "video",
+  AUDIOVIDEO: "audiovideo"
+};
+class BaseSegment {
+  constructor(base) {
+    this._byteRange = null;
+    this._url = null;
+    this._stats = null;
+    this._streams = null;
+    // baseurl is the URL to the playlist
+    this.base = void 0;
+    // relurl is the portion of the URL that comes from inside the playlist.
+    this.relurl = void 0;
+    if (typeof base === 'string') {
+      base = {
+        url: base
+      };
+    }
+    this.base = base;
+    makeEnumerable(this, 'stats');
+  }
+
+  // setByteRange converts a EXT-X-BYTERANGE attribute into a two element array
+  setByteRange(value, previous) {
+    const params = value.split('@', 2);
+    let start;
+    if (params.length === 1) {
+      start = (previous == null ? void 0 : previous.byteRangeEndOffset) || 0;
+    } else {
+      start = parseInt(params[1]);
+    }
+    this._byteRange = [start, parseInt(params[0]) + start];
+  }
+  get baseurl() {
+    return this.base.url;
+  }
+  get byteRange() {
+    if (this._byteRange === null) {
+      return [];
+    }
+    return this._byteRange;
+  }
+  get byteRangeStartOffset() {
+    return this.byteRange[0];
+  }
+  get byteRangeEndOffset() {
+    return this.byteRange[1];
+  }
+  get elementaryStreams() {
+    if (this._streams === null) {
+      this._streams = {
+        [ElementaryStreamTypes.AUDIO]: null,
+        [ElementaryStreamTypes.VIDEO]: null,
+        [ElementaryStreamTypes.AUDIOVIDEO]: null
+      };
+    }
+    return this._streams;
+  }
+  set elementaryStreams(value) {
+    this._streams = value;
+  }
+  get hasStats() {
+    return this._stats !== null;
+  }
+  get hasStreams() {
+    return this._streams !== null;
+  }
+  get stats() {
+    if (this._stats === null) {
+      this._stats = new LoadStats();
+    }
+    return this._stats;
+  }
+  set stats(value) {
+    this._stats = value;
+  }
+  get url() {
+    if (!this._url && this.baseurl && this.relurl) {
+      this._url = urlToolkitExports.buildAbsoluteURL(this.baseurl, this.relurl, {
+        alwaysNormalize: true
+      });
+    }
+    return this._url || '';
+  }
+  set url(value) {
+    this._url = value;
+  }
+  clearElementaryStreamInfo() {
+    const {
+      elementaryStreams
+    } = this;
+    elementaryStreams[ElementaryStreamTypes.AUDIO] = null;
+    elementaryStreams[ElementaryStreamTypes.VIDEO] = null;
+    elementaryStreams[ElementaryStreamTypes.AUDIOVIDEO] = null;
+  }
+}
+function isMediaFragment(frag) {
+  return frag.sn !== 'initSegment';
+}
+
+/**
+ * Object representing parsed data from an HLS Segment. Found in {@link hls.js#LevelDetails.fragments}.
+ */
+class Fragment extends BaseSegment {
+  constructor(type, base) {
+    super(base);
+    this._decryptdata = null;
+    this._programDateTime = null;
+    this._ref = null;
+    // Approximate bit rate of the fragment expressed in bits per second (bps) as indicated by the last EXT-X-BITRATE (kbps) tag
+    this._bitrate = void 0;
+    this.rawProgramDateTime = null;
+    this.tagList = [];
+    // EXTINF has to be present for a m3u8 to be considered valid
+    this.duration = 0;
+    // sn notates the sequence number for a segment, and if set to a string can be 'initSegment'
+    this.sn = 0;
+    // levelkeys are the EXT-X-KEY tags that apply to this segment for decryption
+    // core difference from the private field _decryptdata is the lack of the initialized IV
+    // _decryptdata will set the IV for this segment based on the segment number in the fragment
+    this.levelkeys = void 0;
+    // A string representing the fragment type
+    this.type = void 0;
+    // A reference to the loader. Set while the fragment is loading, and removed afterwards. Used to abort fragment loading
+    this.loader = null;
+    // A reference to the key loader. Set while the key is loading, and removed afterwards. Used to abort key loading
+    this.keyLoader = null;
+    // The level/track index to which the fragment belongs
+    this.level = -1;
+    // The continuity counter of the fragment
+    this.cc = 0;
+    // The starting Presentation Time Stamp (PTS) of the fragment. Set after transmux complete.
+    this.startPTS = void 0;
+    // The ending Presentation Time Stamp (PTS) of the fragment. Set after transmux complete.
+    this.endPTS = void 0;
+    // The starting Decode Time Stamp (DTS) of the fragment. Set after transmux complete.
+    this.startDTS = void 0;
+    // The ending Decode Time Stamp (DTS) of the fragment. Set after transmux complete.
+    this.endDTS = void 0;
+    // The start time of the fragment, as listed in the manifest. Updated after transmux complete.
+    this.start = 0;
+    // The offset time (seconds) of the fragment from the start of the Playlist
+    this.playlistOffset = 0;
+    // Set by `updateFragPTSDTS` in level-helper
+    this.deltaPTS = void 0;
+    // The maximum starting Presentation Time Stamp (audio/video PTS) of the fragment. Set after transmux complete.
+    this.maxStartPTS = void 0;
+    // The minimum ending Presentation Time Stamp (audio/video PTS) of the fragment. Set after transmux complete.
+    this.minEndPTS = void 0;
+    // Init Segment bytes (unset for media segments)
+    this.data = void 0;
+    // A flag indicating whether the segment was downloaded in order to test bitrate, and was not buffered
+    this.bitrateTest = false;
+    // #EXTINF  segment title
+    this.title = null;
+    // The Media Initialization Section for this segment
+    this.initSegment = null;
+    // Fragment is the last fragment in the media playlist
+    this.endList = void 0;
+    // Fragment is marked by an EXT-X-GAP tag indicating that it does not contain media data and should not be loaded
+    this.gap = void 0;
+    // Deprecated
+    this.urlId = 0;
+    this.type = type;
+  }
+  get byteLength() {
+    if (this.hasStats) {
+      const total = this.stats.total;
+      if (total) {
+        return total;
+      }
+    }
+    if (this.byteRange.length) {
+      const start = this.byteRange[0];
+      const end = this.byteRange[1];
+      if (isFiniteNumber(start) && isFiniteNumber(end)) {
+        return end - start;
+      }
+    }
+    return null;
+  }
+  get bitrate() {
+    if (this.byteLength) {
+      return this.byteLength * 8 / this.duration;
+    }
+    if (this._bitrate) {
+      return this._bitrate;
+    }
+    return null;
+  }
+  set bitrate(value) {
+    this._bitrate = value;
+  }
+  get decryptdata() {
+    var _this$_decryptdata;
+    const {
+      levelkeys
+    } = this;
+    if (!levelkeys || levelkeys.NONE) {
+      return null;
+    }
+    if (levelkeys.identity) {
+      if (!this._decryptdata) {
+        this._decryptdata = levelkeys.identity.getDecryptData(this.sn);
+      }
+    } else if (!((_this$_decryptdata = this._decryptdata) != null && _this$_decryptdata.keyId)) {
+      const keyFormats = Object.keys(levelkeys);
+      if (keyFormats.length === 1) {
+        const levelKey = this._decryptdata = levelkeys[keyFormats[0]] || null;
+        if (levelKey) {
+          this._decryptdata = levelKey.getDecryptData(this.sn, levelkeys);
+        }
+      }
+    }
+    return this._decryptdata;
+  }
+  get end() {
+    return this.start + this.duration;
+  }
+  get endProgramDateTime() {
+    if (this.programDateTime === null) {
+      return null;
+    }
+    const duration = !isFiniteNumber(this.duration) ? 0 : this.duration;
+    return this.programDateTime + duration * 1000;
+  }
+  get encrypted() {
+    var _this$_decryptdata2;
+    // At the m3u8-parser level we need to add support for manifest signalled keyformats
+    // when we want the fragment to start reporting that it is encrypted.
+    // Currently, keyFormat will only be set for identity keys
+    if ((_this$_decryptdata2 = this._decryptdata) != null && _this$_decryptdata2.encrypted) {
+      return true;
+    } else if (this.levelkeys) {
+      var _this$levelkeys$keyFo;
+      const keyFormats = Object.keys(this.levelkeys);
+      const len = keyFormats.length;
+      if (len > 1 || len === 1 && (_this$levelkeys$keyFo = this.levelkeys[keyFormats[0]]) != null && _this$levelkeys$keyFo.encrypted) {
+        return true;
+      }
+    }
+    return false;
+  }
+  get programDateTime() {
+    if (this._programDateTime === null && this.rawProgramDateTime) {
+      this.programDateTime = Date.parse(this.rawProgramDateTime);
+    }
+    return this._programDateTime;
+  }
+  set programDateTime(value) {
+    if (!isFiniteNumber(value)) {
+      this._programDateTime = this.rawProgramDateTime = null;
+      return;
+    }
+    this._programDateTime = value;
+  }
+  get ref() {
+    if (!isMediaFragment(this)) {
+      return null;
+    }
+    if (!this._ref) {
+      this._ref = {
+        base: this.base,
+        start: this.start,
+        duration: this.duration,
+        sn: this.sn,
+        programDateTime: this.programDateTime
+      };
+    }
+    return this._ref;
+  }
+  addStart(value) {
+    this.setStart(this.start + value);
+  }
+  setStart(value) {
+    this.start = value;
+    if (this._ref) {
+      this._ref.start = value;
+    }
+  }
+  setDuration(value) {
+    this.duration = value;
+    if (this._ref) {
+      this._ref.duration = value;
+    }
+  }
+  setKeyFormat(keyFormat) {
+    const levelkeys = this.levelkeys;
+    if (levelkeys) {
+      var _this$_decryptdata3;
+      const key = levelkeys[keyFormat];
+      if (key && !((_this$_decryptdata3 = this._decryptdata) != null && _this$_decryptdata3.keyId)) {
+        this._decryptdata = key.getDecryptData(this.sn, levelkeys);
+      }
+    }
+  }
+  abortRequests() {
+    var _this$loader, _this$keyLoader;
+    (_this$loader = this.loader) == null || _this$loader.abort();
+    (_this$keyLoader = this.keyLoader) == null || _this$keyLoader.abort();
+  }
+  setElementaryStreamInfo(type, startPTS, endPTS, startDTS, endDTS, partial = false) {
+    const {
+      elementaryStreams
+    } = this;
+    const info = elementaryStreams[type];
+    if (!info) {
+      elementaryStreams[type] = {
+        startPTS,
+        endPTS,
+        startDTS,
+        endDTS,
+        partial
+      };
+      return;
+    }
+    info.startPTS = Math.min(info.startPTS, startPTS);
+    info.endPTS = Math.max(info.endPTS, endPTS);
+    info.startDTS = Math.min(info.startDTS, startDTS);
+    info.endDTS = Math.max(info.endDTS, endDTS);
+  }
+}
+
+/**
+ * Object representing parsed data from an HLS Partial Segment. Found in {@link hls.js#LevelDetails.partList}.
+ */
+class Part extends BaseSegment {
+  constructor(partAttrs, frag, base, index, previous) {
+    super(base);
+    this.fragOffset = 0;
+    this.duration = 0;
+    this.gap = false;
+    this.independent = false;
+    this.relurl = void 0;
+    this.fragment = void 0;
+    this.index = void 0;
+    this.duration = partAttrs.decimalFloatingPoint('DURATION');
+    this.gap = partAttrs.bool('GAP');
+    this.independent = partAttrs.bool('INDEPENDENT');
+    this.relurl = partAttrs.enumeratedString('URI');
+    this.fragment = frag;
+    this.index = index;
+    const byteRange = partAttrs.enumeratedString('BYTERANGE');
+    if (byteRange) {
+      this.setByteRange(byteRange, previous);
+    }
+    if (previous) {
+      this.fragOffset = previous.fragOffset + previous.duration;
+    }
+  }
+  get start() {
+    return this.fragment.start + this.fragOffset;
+  }
+  get end() {
+    return this.start + this.duration;
+  }
+  get loaded() {
+    const {
+      elementaryStreams
+    } = this;
+    return !!(elementaryStreams.audio || elementaryStreams.video || elementaryStreams.audiovideo);
+  }
+}
+function getOwnPropertyDescriptorFromPrototypeChain(object, property) {
+  const prototype = Object.getPrototypeOf(object);
+  if (prototype) {
+    const propertyDescriptor = Object.getOwnPropertyDescriptor(prototype, property);
+    if (propertyDescriptor) {
+      return propertyDescriptor;
+    }
+    return getOwnPropertyDescriptorFromPrototypeChain(prototype, property);
+  }
+}
+function makeEnumerable(object, property) {
+  const d = getOwnPropertyDescriptorFromPrototypeChain(object, property);
+  if (d) {
+    d.enumerable = true;
+    Object.defineProperty(object, property, d);
+  }
+}
+
+const UINT32_MAX$1 = Math.pow(2, 32) - 1;
+const push = [].push;
+
+// We are using fixed track IDs for driving the MP4 remuxer
+// instead of following the TS PIDs.
+// There is no reason not to do this and some browsers/SourceBuffer-demuxers
+// may not like if there are TrackID "switches"
+// See https://github.com/video-dev/hls.js/issues/1331
+// Here we are mapping our internal track types to constant MP4 track IDs
+// With MSE currently one can only have one track of each, and we are muxing
+// whatever video/audio rendition in them.
+const RemuxerTrackIdConfig = {
+  video: 1,
+  audio: 2,
+  id3: 3,
+  text: 4
+};
+function bin2str(data) {
+  return String.fromCharCode.apply(null, data);
+}
+function readUint16(buffer, offset) {
+  const val = buffer[offset] << 8 | buffer[offset + 1];
+  return val < 0 ? 65536 + val : val;
+}
+function readUint32(buffer, offset) {
+  const val = readSint32(buffer, offset);
+  return val < 0 ? 4294967296 + val : val;
+}
+function readUint64(buffer, offset) {
+  let result = readUint32(buffer, offset);
+  result *= Math.pow(2, 32);
+  result += readUint32(buffer, offset + 4);
+  return result;
+}
+function readSint32(buffer, offset) {
+  return buffer[offset] << 24 | buffer[offset + 1] << 16 | buffer[offset + 2] << 8 | buffer[offset + 3];
+}
+
+// Find "moof" box
+function hasMoofData(data) {
+  const end = data.byteLength;
+  for (let i = 0; i < end;) {
+    const size = readUint32(data, i);
+    if (size > 8 && data[i + 4] === 0x6d && data[i + 5] === 0x6f && data[i + 6] === 0x6f && data[i + 7] === 0x66) {
+      return true;
+    }
+    i = size > 1 ? i + size : end;
+  }
+  return false;
+}
+
+// Find the data for a box specified by its path
+function findBox(data, path) {
+  const results = [];
+  if (!path.length) {
+    // short-circuit the search for empty paths
+    return results;
+  }
+  const end = data.byteLength;
+  for (let i = 0; i < end;) {
+    const size = readUint32(data, i);
+    const type = bin2str(data.subarray(i + 4, i + 8));
+    const endbox = size > 1 ? i + size : end;
+    if (type === path[0]) {
+      if (path.length === 1) {
+        // this is the end of the path and we've found the box we were
+        // looking for
+        results.push(data.subarray(i + 8, endbox));
+      } else {
+        // recursively search for the next box along the path
+        const subresults = findBox(data.subarray(i + 8, endbox), path.slice(1));
+        if (subresults.length) {
+          push.apply(results, subresults);
+        }
+      }
+    }
+    i = endbox;
+  }
+
+  // we've finished searching all of data
+  return results;
+}
+function parseSegmentIndex(sidx) {
+  const references = [];
+  const version = sidx[0];
+
+  // set initial offset, we skip the reference ID (not needed)
+  let index = 8;
+  const timescale = readUint32(sidx, index);
+  index += 4;
+  let earliestPresentationTime = 0;
+  let firstOffset = 0;
+  if (version === 0) {
+    earliestPresentationTime = readUint32(sidx, index);
+    firstOffset = readUint32(sidx, index + 4);
+    index += 8;
+  } else {
+    earliestPresentationTime = readUint64(sidx, index);
+    firstOffset = readUint64(sidx, index + 8);
+    index += 16;
+  }
+
+  // skip reserved
+  index += 2;
+  let startByte = sidx.length + firstOffset;
+  const referencesCount = readUint16(sidx, index);
+  index += 2;
+  for (let i = 0; i < referencesCount; i++) {
+    let referenceIndex = index;
+    const referenceInfo = readUint32(sidx, referenceIndex);
+    referenceIndex += 4;
+    const referenceSize = referenceInfo & 0x7fffffff;
+    const referenceType = (referenceInfo & 0x80000000) >>> 31;
+    if (referenceType === 1) {
+      logger.warn('SIDX has hierarchical references (not supported)');
+      return null;
+    }
+    const subsegmentDuration = readUint32(sidx, referenceIndex);
+    referenceIndex += 4;
+    references.push({
+      referenceSize,
+      subsegmentDuration,
+      // unscaled
+      info: {
+        duration: subsegmentDuration / timescale,
+        start: startByte,
+        end: startByte + referenceSize - 1
+      }
+    });
+    startByte += referenceSize;
+
+    // Skipping 1 bit for |startsWithSap|, 3 bits for |sapType|, and 28 bits
+    // for |sapDelta|.
+    referenceIndex += 4;
+
+    // skip to next ref
+    index = referenceIndex;
+  }
+  return {
+    earliestPresentationTime,
+    timescale,
+    version,
+    referencesCount,
+    references
+  };
+}
+
+/**
+ * Parses an MP4 initialization segment and extracts stream type and
+ * timescale values for any declared tracks. Timescale values indicate the
+ * number of clock ticks per second to assume for time-based values
+ * elsewhere in the MP4.
+ *
+ * To determine the start time of an MP4, you need two pieces of
+ * information: the timescale unit and the earliest base media decode
+ * time. Multiple timescales can be specified within an MP4 but the
+ * base media decode time is always expressed in the timescale from
+ * the media header box for the track:
+ * ```
+ * moov > trak > mdia > mdhd.timescale
+ * moov > trak > mdia > hdlr
+ * ```
+ * @param initSegment the bytes of the init segment
+ * @returns a hash of track type to timescale values or null if
+ * the init segment is malformed.
+ */
+
+function parseInitSegment(initSegment) {
+  const result = [];
+  const traks = findBox(initSegment, ['moov', 'trak']);
+  for (let i = 0; i < traks.length; i++) {
+    const trak = traks[i];
+    const tkhd = findBox(trak, ['tkhd'])[0];
+    if (tkhd) {
+      let version = tkhd[0];
+      const trackId = readUint32(tkhd, version === 0 ? 12 : 20);
+      const mdhd = findBox(trak, ['mdia', 'mdhd'])[0];
+      if (mdhd) {
+        version = mdhd[0];
+        const timescale = readUint32(mdhd, version === 0 ? 12 : 20);
+        const hdlr = findBox(trak, ['mdia', 'hdlr'])[0];
+        if (hdlr) {
+          const hdlrType = bin2str(hdlr.subarray(8, 12));
+          const type = {
+            soun: ElementaryStreamTypes.AUDIO,
+            vide: ElementaryStreamTypes.VIDEO
+          }[hdlrType];
+          // Parse codec details
+          const stsdBox = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];
+          const stsd = parseStsd(stsdBox);
+          if (type) {
+            // Add 'audio', 'video', and 'audiovideo' track records that will map to SourceBuffers
+            result[trackId] = {
+              timescale,
+              type,
+              stsd
+            };
+            result[type] = _objectSpread2({
+              timescale,
+              id: trackId
+            }, stsd);
+          } else {
+            // Add 'meta' and other track records
+            result[trackId] = {
+              timescale,
+              type: hdlrType,
+              stsd
+            };
+          }
+        }
+      }
+    }
+  }
+  const trex = findBox(initSegment, ['moov', 'mvex', 'trex']);
+  trex.forEach(trex => {
+    const trackId = readUint32(trex, 4);
+    const track = result[trackId];
+    if (track) {
+      track.default = {
+        duration: readUint32(trex, 12),
+        flags: readUint32(trex, 20)
+      };
+    }
+  });
+  return result;
+}
+function parseStsd(stsd) {
+  const sampleEntries = stsd.subarray(8);
+  const sampleEntriesEnd = sampleEntries.subarray(8 + 78);
+  const fourCC = bin2str(sampleEntries.subarray(4, 8));
+  let codec = fourCC;
+  let supplemental;
+  const encrypted = fourCC === 'enca' || fourCC === 'encv';
+  if (encrypted) {
+    const encBox = findBox(sampleEntries, [fourCC])[0];
+    const encBoxChildren = encBox.subarray(fourCC === 'enca' ? 28 : 78);
+    const sinfs = findBox(encBoxChildren, ['sinf']);
+    sinfs.forEach(sinf => {
+      const schm = findBox(sinf, ['schm'])[0];
+      if (schm) {
+        const scheme = bin2str(schm.subarray(4, 8));
+        if (scheme === 'cbcs' || scheme === 'cenc') {
+          const frma = findBox(sinf, ['frma'])[0];
+          if (frma) {
+            // for encrypted content codec fourCC will be in frma
+            codec = bin2str(frma);
+          }
+        }
+      }
+    });
+  }
+  const codecFourCC = codec;
+  switch (codec) {
+    case 'avc1':
+    case 'avc2':
+    case 'avc3':
+    case 'avc4':
+      {
+        // extract profile + compatibility + level out of avcC box
+        const avcCBox = findBox(sampleEntriesEnd, ['avcC'])[0];
+        if (avcCBox && avcCBox.length > 3) {
+          codec += '.' + toHex(avcCBox[1]) + toHex(avcCBox[2]) + toHex(avcCBox[3]);
+          supplemental = parseSupplementalDoViCodec(codecFourCC === 'avc1' ? 'dva1' : 'dvav', sampleEntriesEnd);
+        }
+        break;
+      }
+    case 'mp4a':
+      {
+        const codecBox = findBox(sampleEntries, [fourCC])[0];
+        const esdsBox = findBox(codecBox.subarray(28), ['esds'])[0];
+        if (esdsBox && esdsBox.length > 7) {
+          let i = 4;
+          // ES Descriptor tag
+          if (esdsBox[i++] !== 0x03) {
+            break;
+          }
+          i = skipBERInteger(esdsBox, i);
+          i += 2; // skip es_id;
+          const flags = esdsBox[i++];
+          if (flags & 0x80) {
+            i += 2; // skip dependency es_id
+          }
+          if (flags & 0x40) {
+            i += esdsBox[i++]; // skip URL
+          }
+          // Decoder config descriptor
+          if (esdsBox[i++] !== 0x04) {
+            break;
+          }
+          i = skipBERInteger(esdsBox, i);
+          const objectType = esdsBox[i++];
+          if (objectType === 0x40) {
+            codec += '.' + toHex(objectType);
+          } else {
+            break;
+          }
+          i += 12;
+          // Decoder specific info
+          if (esdsBox[i++] !== 0x05) {
+            break;
+          }
+          i = skipBERInteger(esdsBox, i);
+          const firstByte = esdsBox[i++];
+          let audioObjectType = (firstByte & 0xf8) >> 3;
+          if (audioObjectType === 31) {
+            audioObjectType += 1 + ((firstByte & 0x7) << 3) + ((esdsBox[i] & 0xe0) >> 5);
+          }
+          codec += '.' + audioObjectType;
+        }
+        break;
+      }
+    case 'hvc1':
+    case 'hev1':
+      {
+        const hvcCBox = findBox(sampleEntriesEnd, ['hvcC'])[0];
+        if (hvcCBox && hvcCBox.length > 12) {
+          const profileByte = hvcCBox[1];
+          const profileSpace = ['', 'A', 'B', 'C'][profileByte >> 6];
+          const generalProfileIdc = profileByte & 0x1f;
+          const profileCompat = readUint32(hvcCBox, 2);
+          const tierFlag = (profileByte & 0x20) >> 5 ? 'H' : 'L';
+          const levelIDC = hvcCBox[12];
+          const constraintIndicator = hvcCBox.subarray(6, 12);
+          codec += '.' + profileSpace + generalProfileIdc;
+          codec += '.' + reverse32BitInt(profileCompat).toString(16).toUpperCase();
+          codec += '.' + tierFlag + levelIDC;
+          let constraintString = '';
+          for (let i = constraintIndicator.length; i--;) {
+            const byte = constraintIndicator[i];
+            if (byte || constraintString) {
+              const encodedByte = byte.toString(16).toUpperCase();
+              constraintString = '.' + encodedByte + constraintString;
+            }
+          }
+          codec += constraintString;
+        }
+        supplemental = parseSupplementalDoViCodec(codecFourCC == 'hev1' ? 'dvhe' : 'dvh1', sampleEntriesEnd);
+        break;
+      }
+    case 'dvh1':
+    case 'dvhe':
+    case 'dvav':
+    case 'dva1':
+    case 'dav1':
+      {
+        codec = parseSupplementalDoViCodec(codec, sampleEntriesEnd) || codec;
+        break;
+      }
+    case 'vp09':
+      {
+        const vpcCBox = findBox(sampleEntriesEnd, ['vpcC'])[0];
+        if (vpcCBox && vpcCBox.length > 6) {
+          const profile = vpcCBox[4];
+          const level = vpcCBox[5];
+          const bitDepth = vpcCBox[6] >> 4 & 0x0f;
+          codec += '.' + addLeadingZero(profile) + '.' + addLeadingZero(level) + '.' + addLeadingZero(bitDepth);
+        }
+        break;
+      }
+    case 'av01':
+      {
+        const av1CBox = findBox(sampleEntriesEnd, ['av1C'])[0];
+        if (av1CBox && av1CBox.length > 2) {
+          const profile = av1CBox[1] >>> 5;
+          const level = av1CBox[1] & 0x1f;
+          const tierFlag = av1CBox[2] >>> 7 ? 'H' : 'M';
+          const highBitDepth = (av1CBox[2] & 0x40) >> 6;
+          const twelveBit = (av1CBox[2] & 0x20) >> 5;
+          const bitDepth = profile === 2 && highBitDepth ? twelveBit ? 12 : 10 : highBitDepth ? 10 : 8;
+          const monochrome = (av1CBox[2] & 0x10) >> 4;
+          const chromaSubsamplingX = (av1CBox[2] & 0x08) >> 3;
+          const chromaSubsamplingY = (av1CBox[2] & 0x04) >> 2;
+          const chromaSamplePosition = av1CBox[2] & 0x03;
+          // TODO: parse color_description_present_flag
+          // default it to BT.709/limited range for now
+          // more info https://aomediacodec.github.io/av1-isobmff/#av1codecconfigurationbox-syntax
+          const colorPrimaries = 1;
+          const transferCharacteristics = 1;
+          const matrixCoefficients = 1;
+          const videoFullRangeFlag = 0;
+          codec += '.' + profile + '.' + addLeadingZero(level) + tierFlag + '.' + addLeadingZero(bitDepth) + '.' + monochrome + '.' + chromaSubsamplingX + chromaSubsamplingY + chromaSamplePosition + '.' + addLeadingZero(colorPrimaries) + '.' + addLeadingZero(transferCharacteristics) + '.' + addLeadingZero(matrixCoefficients) + '.' + videoFullRangeFlag;
+          supplemental = parseSupplementalDoViCodec('dav1', sampleEntriesEnd);
+        }
+        break;
+      }
+  }
+  return {
+    codec,
+    encrypted,
+    supplemental
+  };
+}
+function parseSupplementalDoViCodec(fourCC, sampleEntriesEnd) {
+  const dvvCResult = findBox(sampleEntriesEnd, ['dvvC']); // used by DoVi Profile 8 to 10
+  const dvXCBox = dvvCResult.length ? dvvCResult[0] : findBox(sampleEntriesEnd, ['dvcC'])[0]; // used by DoVi Profiles up to 7 and 20
+  if (dvXCBox) {
+    const doViProfile = dvXCBox[2] >> 1 & 0x7f;
+    const doViLevel = dvXCBox[2] << 5 & 0x20 | dvXCBox[3] >> 3 & 0x1f;
+    return fourCC + '.' + addLeadingZero(doViProfile) + '.' + addLeadingZero(doViLevel);
+  }
+}
+function reverse32BitInt(val) {
+  let result = 0;
+  for (let i = 0; i < 32; i++) {
+    result |= (val >> i & 1) << 32 - 1 - i;
+  }
+  return result >>> 0;
+}
+function skipBERInteger(bytes, i) {
+  const limit = i + 5;
+  while (bytes[i++] & 0x80 && i < limit) {
+    /* do nothing */
+  }
+  return i;
+}
+function toHex(x) {
+  return ('0' + x.toString(16).toUpperCase()).slice(-2);
+}
+function addLeadingZero(num) {
+  return (num < 10 ? '0' : '') + num;
+}
+function patchEncyptionData(initSegment, decryptdata) {
+  if (!initSegment || !decryptdata) {
+    return;
+  }
+  const keyId = decryptdata.keyId;
+  if (keyId && decryptdata.isCommonEncryption) {
+    applyToTencBoxes(initSegment, (tenc, isAudio) => {
+      // Look for default key id (keyID offset is always 8 within the tenc box):
+      const tencKeyId = tenc.subarray(8, 24);
+      if (!tencKeyId.some(b => b !== 0)) {
+        logger.log(`[eme] Patching keyId in 'enc${isAudio ? 'a' : 'v'}>sinf>>tenc' box: ${arrayToHex(tencKeyId)} -> ${arrayToHex(keyId)}`);
+        tenc.set(keyId, 8);
+      }
+    });
+  }
+}
+function parseKeyIdsFromTenc(initSegment) {
+  const keyIds = [];
+  applyToTencBoxes(initSegment, tenc => keyIds.push(tenc.subarray(8, 24)));
+  return keyIds;
+}
+function applyToTencBoxes(initSegment, predicate) {
+  const traks = findBox(initSegment, ['moov', 'trak']);
+  traks.forEach(trak => {
+    const stsd = findBox(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];
+    if (!stsd) return;
+    const sampleEntries = stsd.subarray(8);
+    let encBoxes = findBox(sampleEntries, ['enca']);
+    const isAudio = encBoxes.length > 0;
+    if (!isAudio) {
+      encBoxes = findBox(sampleEntries, ['encv']);
+    }
+    encBoxes.forEach(enc => {
+      const encBoxChildren = isAudio ? enc.subarray(28) : enc.subarray(78);
+      const sinfBoxes = findBox(encBoxChildren, ['sinf']);
+      sinfBoxes.forEach(sinf => {
+        const tenc = parseSinf(sinf);
+        if (tenc) {
+          predicate(tenc, isAudio);
+        }
+      });
+    });
+  });
+}
+function parseSinf(sinf) {
+  const schm = findBox(sinf, ['schm'])[0];
+  if (schm) {
+    const scheme = bin2str(schm.subarray(4, 8));
+    if (scheme === 'cbcs' || scheme === 'cenc') {
+      const tenc = findBox(sinf, ['schi', 'tenc'])[0];
+      if (tenc) {
+        return tenc;
+      }
+    }
+  }
+}
+
+/*
+  For Reference:
+  aligned(8) class TrackFragmentHeaderBox
+           extends FullBox(‘tfhd’, 0, tf_flags){
+     unsigned int(32)  track_ID;
+     // all the following are optional fields
+     unsigned int(64)  base_data_offset;
+     unsigned int(32)  sample_description_index;
+     unsigned int(32)  default_sample_duration;
+     unsigned int(32)  default_sample_size;
+     unsigned int(32)  default_sample_flags
+  }
+ */
+
+function getSampleData(data, initData, logger) {
+  const tracks = {};
+  const trafs = findBox(data, ['moof', 'traf']);
+  for (let i = 0; i < trafs.length; i++) {
+    const traf = trafs[i];
+    // There is only one tfhd & trun per traf
+    // This is true for CMAF style content, and we should perhaps check the ftyp
+    // and only look for a single trun then, but for ISOBMFF we should check
+    // for multiple track runs.
+    const tfhd = findBox(traf, ['tfhd'])[0];
+    // get the track id from the tfhd
+    const id = readUint32(tfhd, 4);
+    const track = initData[id];
+    if (!track) {
+      continue;
+    }
+    tracks[id] || (tracks[id] = {
+      start: NaN,
+      duration: 0,
+      sampleCount: 0,
+      timescale: track.timescale,
+      type: track.type
+    });
+    const trackTimes = tracks[id];
+    // get start DTS
+    const tfdt = findBox(traf, ['tfdt'])[0];
+    if (tfdt) {
+      const version = tfdt[0];
+      let baseTime = readUint32(tfdt, 4);
+      if (version === 1) {
+        // If value is too large, assume signed 64-bit. Negative track fragment decode times are invalid, but they exist in the wild.
+        // This prevents large values from being used for initPTS, which can cause playlist sync issues.
+        // https://github.com/video-dev/hls.js/issues/5303
+        if (baseTime === UINT32_MAX$1) {
+          logger.warn(`[mp4-demuxer]: Ignoring assumed invalid signed 64-bit track fragment decode time`);
+        } else {
+          baseTime *= UINT32_MAX$1 + 1;
+          baseTime += readUint32(tfdt, 8);
+        }
+      }
+      if (isFiniteNumber(baseTime) && (!isFiniteNumber(trackTimes.start) || baseTime < trackTimes.start)) {
+        trackTimes.start = baseTime;
+      }
+    }
+    const trackDefault = track.default;
+    const tfhdFlags = readUint32(tfhd, 0) | (trackDefault == null ? void 0 : trackDefault.flags);
+    let defaultSampleDuration = (trackDefault == null ? void 0 : trackDefault.duration) || 0;
+    if (tfhdFlags & 0x000008) {
+      // 0x000008 indicates the presence of the default_sample_duration field
+      if (tfhdFlags & 0x000002) {
+        // 0x000002 indicates the presence of the sample_description_index field, which precedes default_sample_duration
+        // If present, the default_sample_duration exists at byte offset 12
+        defaultSampleDuration = readUint32(tfhd, 12);
+      } else {
+        // Otherwise, the duration is at byte offset 8
+        defaultSampleDuration = readUint32(tfhd, 8);
+      }
+    }
+    const truns = findBox(traf, ['trun']);
+    let sampleDTS = trackTimes.start || 0;
+    let rawDuration = 0;
+    let sampleDuration = defaultSampleDuration;
+    for (let j = 0; j < truns.length; j++) {
+      const trun = truns[j];
+      const sampleCount = readUint32(trun, 4);
+      const sampleIndex = trackTimes.sampleCount;
+      trackTimes.sampleCount += sampleCount;
+      // Get duration from samples
+      const dataOffsetPresent = trun[3] & 0x01;
+      const firstSampleFlagsPresent = trun[3] & 0x04;
+      const sampleDurationPresent = trun[2] & 0x01;
+      const sampleSizePresent = trun[2] & 0x02;
+      const sampleFlagsPresent = trun[2] & 0x04;
+      const sampleCompositionTimeOffsetPresent = trun[2] & 0x08;
+      let offset = 8;
+      let remaining = sampleCount;
+      if (dataOffsetPresent) {
+        offset += 4;
+      }
+      if (firstSampleFlagsPresent && sampleCount) {
+        const isNonSyncSample = trun[offset + 1] & 0x01;
+        if (!isNonSyncSample && trackTimes.keyFrameIndex === undefined) {
+          trackTimes.keyFrameIndex = sampleIndex;
+        }
+        offset += 4;
+        if (sampleDurationPresent) {
+          sampleDuration = readUint32(trun, offset);
+          offset += 4;
+        } else {
+          sampleDuration = defaultSampleDuration;
+        }
+        if (sampleSizePresent) {
+          offset += 4;
+        }
+        if (sampleCompositionTimeOffsetPresent) {
+          offset += 4;
+        }
+        sampleDTS += sampleDuration;
+        rawDuration += sampleDuration;
+        remaining--;
+      }
+      while (remaining--) {
+        if (sampleDurationPresent) {
+          sampleDuration = readUint32(trun, offset);
+          offset += 4;
+        } else {
+          sampleDuration = defaultSampleDuration;
+        }
+        if (sampleSizePresent) {
+          offset += 4;
+        }
+        if (sampleFlagsPresent) {
+          const isNonSyncSample = trun[offset + 1] & 0x01;
+          if (!isNonSyncSample) {
+            if (trackTimes.keyFrameIndex === undefined) {
+              trackTimes.keyFrameIndex = trackTimes.sampleCount - (remaining + 1);
+              trackTimes.keyFrameStart = sampleDTS;
+            }
+          }
+          offset += 4;
+        }
+        if (sampleCompositionTimeOffsetPresent) {
+          offset += 4;
+        }
+        sampleDTS += sampleDuration;
+        rawDuration += sampleDuration;
+      }
+      if (!rawDuration && defaultSampleDuration) {
+        rawDuration += defaultSampleDuration * sampleCount;
+      }
+    }
+    trackTimes.duration += rawDuration;
+  }
+  if (!Object.keys(tracks).some(trackId => tracks[trackId].duration)) {
+    // If duration samples are not available in the traf use sidx subsegment_duration
+    let sidxMinStart = Infinity;
+    let sidxMaxEnd = 0;
+    const sidxs = findBox(data, ['sidx']);
+    for (let i = 0; i < sidxs.length; i++) {
+      const sidx = parseSegmentIndex(sidxs[i]);
+      if (sidx != null && sidx.references) {
+        sidxMinStart = Math.min(sidxMinStart, sidx.earliestPresentationTime / sidx.timescale);
+        const subSegmentDuration = sidx.references.reduce((dur, ref) => dur + ref.info.duration || 0, 0);
+        sidxMaxEnd = Math.max(sidxMaxEnd, subSegmentDuration + sidx.earliestPresentationTime / sidx.timescale);
+      }
+    }
+    if (sidxMaxEnd && isFiniteNumber(sidxMaxEnd)) {
+      Object.keys(tracks).forEach(trackId => {
+        if (!tracks[trackId].duration) {
+          tracks[trackId].duration = sidxMaxEnd * tracks[trackId].timescale - tracks[trackId].start;
+        }
+      });
+    }
+  }
+  return tracks;
+}
+
+// TODO: Check if the last moof+mdat pair is part of the valid range
+function segmentValidRange(data) {
+  const segmentedRange = {
+    valid: null,
+    remainder: null
+  };
+  const moofs = findBox(data, ['moof']);
+  if (moofs.length < 2) {
+    segmentedRange.remainder = data;
+    return segmentedRange;
+  }
+  const last = moofs[moofs.length - 1];
+  // Offset by 8 bytes; findBox offsets the start by as much
+  segmentedRange.valid = data.slice(0, last.byteOffset - 8);
+  segmentedRange.remainder = data.slice(last.byteOffset - 8);
+  return segmentedRange;
+}
+function appendUint8Array(data1, data2) {
+  const temp = new Uint8Array(data1.length + data2.length);
+  temp.set(data1);
+  temp.set(data2, data1.length);
+  return temp;
+}
+function parseSamples(timeOffset, track) {
+  const seiSamples = [];
+  const videoData = track.samples;
+  const timescale = track.timescale;
+  const trackId = track.id;
+  let isHEVCFlavor = false;
+  const moofs = findBox(videoData, ['moof']);
+  moofs.map(moof => {
+    const moofOffset = moof.byteOffset - 8;
+    const trafs = findBox(moof, ['traf']);
+    trafs.map(traf => {
+      // get the base media decode time from the tfdt
+      const baseTime = findBox(traf, ['tfdt']).map(tfdt => {
+        const version = tfdt[0];
+        let result = readUint32(tfdt, 4);
+        if (version === 1) {
+          result *= Math.pow(2, 32);
+          result += readUint32(tfdt, 8);
+        }
+        return result / timescale;
+      })[0];
+      if (baseTime !== undefined) {
+        timeOffset = baseTime;
+      }
+      return findBox(traf, ['tfhd']).map(tfhd => {
+        const id = readUint32(tfhd, 4);
+        const tfhdFlags = readUint32(tfhd, 0) & 0xffffff;
+        const baseDataOffsetPresent = (tfhdFlags & 0x000001) !== 0;
+        const sampleDescriptionIndexPresent = (tfhdFlags & 0x000002) !== 0;
+        const defaultSampleDurationPresent = (tfhdFlags & 0x000008) !== 0;
+        let defaultSampleDuration = 0;
+        const defaultSampleSizePresent = (tfhdFlags & 0x000010) !== 0;
+        let defaultSampleSize = 0;
+        const defaultSampleFlagsPresent = (tfhdFlags & 0x000020) !== 0;
+        let tfhdOffset = 8;
+        if (id === trackId) {
+          if (baseDataOffsetPresent) {
+            tfhdOffset += 8;
+          }
+          if (sampleDescriptionIndexPresent) {
+            tfhdOffset += 4;
+          }
+          if (defaultSampleDurationPresent) {
+            defaultSampleDuration = readUint32(tfhd, tfhdOffset);
+            tfhdOffset += 4;
+          }
+          if (defaultSampleSizePresent) {
+            defaultSampleSize = readUint32(tfhd, tfhdOffset);
+            tfhdOffset += 4;
+          }
+          if (defaultSampleFlagsPresent) {
+            tfhdOffset += 4;
+          }
+          if (track.type === 'video') {
+            isHEVCFlavor = isHEVC(track.codec);
+          }
+          findBox(traf, ['trun']).map(trun => {
+            const version = trun[0];
+            const flags = readUint32(trun, 0) & 0xffffff;
+            const dataOffsetPresent = (flags & 0x000001) !== 0;
+            let dataOffset = 0;
+            const firstSampleFlagsPresent = (flags & 0x000004) !== 0;
+            const sampleDurationPresent = (flags & 0x000100) !== 0;
+            let sampleDuration = 0;
+            const sampleSizePresent = (flags & 0x000200) !== 0;
+            let sampleSize = 0;
+            const sampleFlagsPresent = (flags & 0x000400) !== 0;
+            const sampleCompositionOffsetsPresent = (flags & 0x000800) !== 0;
+            let compositionOffset = 0;
+            const sampleCount = readUint32(trun, 4);
+            let trunOffset = 8; // past version, flags, and sample count
+
+            if (dataOffsetPresent) {
+              dataOffset = readUint32(trun, trunOffset);
+              trunOffset += 4;
+            }
+            if (firstSampleFlagsPresent) {
+              trunOffset += 4;
+            }
+            let sampleOffset = dataOffset + moofOffset;
+            for (let ix = 0; ix < sampleCount; ix++) {
+              if (sampleDurationPresent) {
+                sampleDuration = readUint32(trun, trunOffset);
+                trunOffset += 4;
+              } else {
+                sampleDuration = defaultSampleDuration;
+              }
+              if (sampleSizePresent) {
+                sampleSize = readUint32(trun, trunOffset);
+                trunOffset += 4;
+              } else {
+                sampleSize = defaultSampleSize;
+              }
+              if (sampleFlagsPresent) {
+                trunOffset += 4;
+              }
+              if (sampleCompositionOffsetsPresent) {
+                if (version === 0) {
+                  compositionOffset = readUint32(trun, trunOffset);
+                } else {
+                  compositionOffset = readSint32(trun, trunOffset);
+                }
+                trunOffset += 4;
+              }
+              if (track.type === ElementaryStreamTypes.VIDEO) {
+                let naluTotalSize = 0;
+                while (naluTotalSize < sampleSize) {
+                  const naluSize = readUint32(videoData, sampleOffset);
+                  sampleOffset += 4;
+                  if (isSEIMessage(isHEVCFlavor, videoData[sampleOffset])) {
+                    const data = videoData.subarray(sampleOffset, sampleOffset + naluSize);
+                    parseSEIMessageFromNALu(data, isHEVCFlavor ? 2 : 1, timeOffset + compositionOffset / timescale, seiSamples);
+                  }
+                  sampleOffset += naluSize;
+                  naluTotalSize += naluSize + 4;
+                }
+              }
+              timeOffset += sampleDuration / timescale;
+            }
+          });
+        }
+      });
+    });
+  });
+  return seiSamples;
+}
+function isHEVC(codec) {
+  if (!codec) {
+    return false;
+  }
+  const baseCodec = codec.substring(0, 4);
+  return baseCodec === 'hvc1' || baseCodec === 'hev1' ||
+  // Dolby Vision
+  baseCodec === 'dvh1' || baseCodec === 'dvhe';
+}
+function isSEIMessage(isHEVCFlavor, naluHeader) {
+  if (isHEVCFlavor) {
+    const naluType = naluHeader >> 1 & 0x3f;
+    return naluType === 39 || naluType === 40;
+  } else {
+    const naluType = naluHeader & 0x1f;
+    return naluType === 6;
+  }
+}
+function parseSEIMessageFromNALu(unescapedData, headerSize, pts, samples) {
+  const data = discardEPB(unescapedData);
+  let seiPtr = 0;
+  // skip nal header
+  seiPtr += headerSize;
+  let payloadType = 0;
+  let payloadSize = 0;
+  let b = 0;
+  while (seiPtr < data.length) {
+    payloadType = 0;
+    do {
+      if (seiPtr >= data.length) {
+        break;
+      }
+      b = data[seiPtr++];
+      payloadType += b;
+    } while (b === 0xff);
+
+    // Parse payload size.
+    payloadSize = 0;
+    do {
+      if (seiPtr >= data.length) {
+        break;
+      }
+      b = data[seiPtr++];
+      payloadSize += b;
+    } while (b === 0xff);
+    const leftOver = data.length - seiPtr;
+    // Create a variable to process the payload
+    let payPtr = seiPtr;
+
+    // Increment the seiPtr to the end of the payload
+    if (payloadSize < leftOver) {
+      seiPtr += payloadSize;
+    } else if (payloadSize > leftOver) {
+      // Some type of corruption has happened?
+      logger.error(`Malformed SEI payload. ${payloadSize} is too small, only ${leftOver} bytes left to parse.`);
+      // We might be able to parse some data, but let's be safe and ignore it.
+      break;
+    }
+    if (payloadType === 4) {
+      const countryCode = data[payPtr++];
+      if (countryCode === 181) {
+        const providerCode = readUint16(data, payPtr);
+        payPtr += 2;
+        if (providerCode === 49) {
+          const userStructure = readUint32(data, payPtr);
+          payPtr += 4;
+          if (userStructure === 0x47413934) {
+            const userDataType = data[payPtr++];
+
+            // Raw CEA-608 bytes wrapped in CEA-708 packet
+            if (userDataType === 3) {
+              const firstByte = data[payPtr++];
+              const totalCCs = 0x1f & firstByte;
+              const enabled = 0x40 & firstByte;
+              const totalBytes = enabled ? 2 + totalCCs * 3 : 0;
+              const byteArray = new Uint8Array(totalBytes);
+              if (enabled) {
+                byteArray[0] = firstByte;
+                for (let i = 1; i < totalBytes; i++) {
+                  byteArray[i] = data[payPtr++];
+                }
+              }
+              samples.push({
+                type: userDataType,
+                payloadType,
+                pts,
+                bytes: byteArray
+              });
+            }
+          }
+        }
+      }
+    } else if (payloadType === 5) {
+      if (payloadSize > 16) {
+        const uuidStrArray = [];
+        for (let i = 0; i < 16; i++) {
+          const _b = data[payPtr++].toString(16);
+          uuidStrArray.push(_b.length == 1 ? '0' + _b : _b);
+          if (i === 3 || i === 5 || i === 7 || i === 9) {
+            uuidStrArray.push('-');
+          }
+        }
+        const length = payloadSize - 16;
+        const userDataBytes = new Uint8Array(length);
+        for (let i = 0; i < length; i++) {
+          userDataBytes[i] = data[payPtr++];
+        }
+        samples.push({
+          payloadType,
+          pts,
+          uuid: uuidStrArray.join(''),
+          userData: utf8ArrayToStr(userDataBytes),
+          userDataBytes
+        });
+      }
+    }
+  }
+}
+
+/**
+ * remove Emulation Prevention bytes from a RBSP
+ */
+function discardEPB(data) {
+  const length = data.byteLength;
+  const EPBPositions = [];
+  let i = 1;
+
+  // Find all `Emulation Prevention Bytes`
+  while (i < length - 2) {
+    if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {
+      EPBPositions.push(i + 2);
+      i += 2;
+    } else {
+      i++;
+    }
+  }
+
+  // If no Emulation Prevention Bytes were found just return the original
+  // array
+  if (EPBPositions.length === 0) {
+    return data;
+  }
+
+  // Create a new array to hold the NAL unit data
+  const newLength = length - EPBPositions.length;
+  const newData = new Uint8Array(newLength);
+  let sourceIndex = 0;
+  for (i = 0; i < newLength; sourceIndex++, i++) {
+    if (sourceIndex === EPBPositions[0]) {
+      // Skip this byte
+      sourceIndex++;
+      // Remove this position index
+      EPBPositions.shift();
+    }
+    newData[i] = data[sourceIndex];
+  }
+  return newData;
+}
+function parseEmsg(data) {
+  const version = data[0];
+  let schemeIdUri = '';
+  let value = '';
+  let timeScale = 0;
+  let presentationTimeDelta = 0;
+  let presentationTime = 0;
+  let eventDuration = 0;
+  let id = 0;
+  let offset = 0;
+  if (version === 0) {
+    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
+      schemeIdUri += bin2str(data.subarray(offset, offset + 1));
+      offset += 1;
+    }
+    schemeIdUri += bin2str(data.subarray(offset, offset + 1));
+    offset += 1;
+    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
+      value += bin2str(data.subarray(offset, offset + 1));
+      offset += 1;
+    }
+    value += bin2str(data.subarray(offset, offset + 1));
+    offset += 1;
+    timeScale = readUint32(data, 12);
+    presentationTimeDelta = readUint32(data, 16);
+    eventDuration = readUint32(data, 20);
+    id = readUint32(data, 24);
+    offset = 28;
+  } else if (version === 1) {
+    offset += 4;
+    timeScale = readUint32(data, offset);
+    offset += 4;
+    const leftPresentationTime = readUint32(data, offset);
+    offset += 4;
+    const rightPresentationTime = readUint32(data, offset);
+    offset += 4;
+    presentationTime = 2 ** 32 * leftPresentationTime + rightPresentationTime;
+    if (!isSafeInteger(presentationTime)) {
+      presentationTime = Number.MAX_SAFE_INTEGER;
+      logger.warn('Presentation time exceeds safe integer limit and wrapped to max safe integer in parsing emsg box');
+    }
+    eventDuration = readUint32(data, offset);
+    offset += 4;
+    id = readUint32(data, offset);
+    offset += 4;
+    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
+      schemeIdUri += bin2str(data.subarray(offset, offset + 1));
+      offset += 1;
+    }
+    schemeIdUri += bin2str(data.subarray(offset, offset + 1));
+    offset += 1;
+    while (bin2str(data.subarray(offset, offset + 1)) !== '\0') {
+      value += bin2str(data.subarray(offset, offset + 1));
+      offset += 1;
+    }
+    value += bin2str(data.subarray(offset, offset + 1));
+    offset += 1;
+  }
+  const payload = data.subarray(offset, data.byteLength);
+  return {
+    schemeIdUri,
+    value,
+    timeScale,
+    presentationTime,
+    presentationTimeDelta,
+    eventDuration,
+    id,
+    payload
+  };
+}
+function mp4Box(type, ...payload) {
+  const len = payload.length;
+  let size = 8;
+  let i = len;
+  while (i--) {
+    size += payload[i].byteLength;
+  }
+  const result = new Uint8Array(size);
+  result[0] = size >> 24 & 0xff;
+  result[1] = size >> 16 & 0xff;
+  result[2] = size >> 8 & 0xff;
+  result[3] = size & 0xff;
+  result.set(type, 4);
+  for (i = 0, size = 8; i < len; i++) {
+    result.set(payload[i], size);
+    size += payload[i].byteLength;
+  }
+  return result;
+}
+function mp4pssh(systemId, keyids, data) {
+  if (systemId.byteLength !== 16) {
+    throw new RangeError('Invalid system id');
+  }
+  let version;
+  let kids;
+  {
+    version = 0;
+    kids = new Uint8Array();
+  }
+  let kidCount;
+  if (version > 0) {
+    kidCount = new Uint8Array(4);
+    if (keyids.length > 0) {
+      new DataView(kidCount.buffer).setUint32(0, keyids.length, false);
+    }
+  } else {
+    kidCount = new Uint8Array();
+  }
+  const dataSize = new Uint8Array(4);
+  if (data.byteLength > 0) {
+    new DataView(dataSize.buffer).setUint32(0, data.byteLength, false);
+  }
+  return mp4Box([112, 115, 115, 104], new Uint8Array([version, 0x00, 0x00, 0x00 // Flags
+  ]), systemId,
+  // 16 bytes
+  kidCount, kids, dataSize, data);
+}
+function parseMultiPssh(initData) {
+  const results = [];
+  if (initData instanceof ArrayBuffer) {
+    const length = initData.byteLength;
+    let offset = 0;
+    while (offset + 32 < length) {
+      const view = new DataView(initData, offset);
+      const pssh = parsePssh(view);
+      results.push(pssh);
+      offset += pssh.size;
+    }
+  }
+  return results;
+}
+function parsePssh(view) {
+  const size = view.getUint32(0);
+  const offset = view.byteOffset;
+  const length = view.byteLength;
+  if (length < size) {
+    return {
+      offset,
+      size: length
+    };
+  }
+  const type = view.getUint32(4);
+  if (type !== 0x70737368) {
+    return {
+      offset,
+      size
+    };
+  }
+  const version = view.getUint32(8) >>> 24;
+  if (version !== 0 && version !== 1) {
+    return {
+      offset,
+      size
+    };
+  }
+  const buffer = view.buffer;
+  const systemId = arrayToHex(new Uint8Array(buffer, offset + 12, 16));
+  let kids = null;
+  let data = null;
+  let dataSizeOffset = 0;
+  if (version === 0) {
+    dataSizeOffset = 28;
+  } else {
+    const kidCounts = view.getUint32(28);
+    if (!kidCounts || length < 32 + kidCounts * 16) {
+      return {
+        offset,
+        size
+      };
+    }
+    kids = [];
+    for (let i = 0; i < kidCounts; i++) {
+      kids.push(new Uint8Array(buffer, offset + 32 + i * 16, 16));
+    }
+    dataSizeOffset = 32 + kidCounts * 16;
+  }
+  if (!dataSizeOffset) {
+    return {
+      offset,
+      size
+    };
+  }
+  const dataSizeOrKidCount = view.getUint32(dataSizeOffset);
+  if (size - 32 < dataSizeOrKidCount) {
+    return {
+      offset,
+      size
+    };
+  }
+  data = new Uint8Array(buffer, offset + dataSizeOffset + 4, dataSizeOrKidCount);
+  return {
+    version,
+    systemId,
+    kids,
+    data,
+    offset,
+    size
+  };
+}
+
+const userAgentHevcSupportIsInaccurate = () => {
+  return /\(Windows.+Firefox\//i.test(navigator.userAgent);
+};
+
+// from http://mp4ra.org/codecs.html
+// values indicate codec selection preference (lower is higher priority)
+const sampleEntryCodesISO = {
+  audio: {
+    a3ds: 1,
+    'ac-3': 0.95,
+    'ac-4': 1,
+    alac: 0.9,
+    alaw: 1,
+    dra1: 1,
+    'dts+': 1,
+    'dts-': 1,
+    dtsc: 1,
+    dtse: 1,
+    dtsh: 1,
+    'ec-3': 0.9,
+    enca: 1,
+    fLaC: 0.9,
+    // MP4-RA listed codec entry for FLAC
+    flac: 0.9,
+    // legacy browser codec name for FLAC
+    FLAC: 0.9,
+    // some manifests may list "FLAC" with Apple's tools
+    g719: 1,
+    g726: 1,
+    m4ae: 1,
+    mha1: 1,
+    mha2: 1,
+    mhm1: 1,
+    mhm2: 1,
+    mlpa: 1,
+    mp4a: 1,
+    'raw ': 1,
+    Opus: 1,
+    opus: 1,
+    // browsers expect this to be lowercase despite MP4RA says 'Opus'
+    samr: 1,
+    sawb: 1,
+    sawp: 1,
+    sevc: 1,
+    sqcp: 1,
+    ssmv: 1,
+    twos: 1,
+    ulaw: 1
+  },
+  video: {
+    avc1: 1,
+    avc2: 1,
+    avc3: 1,
+    avc4: 1,
+    avcp: 1,
+    av01: 0.8,
+    dav1: 0.8,
+    drac: 1,
+    dva1: 1,
+    dvav: 1,
+    dvh1: 0.7,
+    dvhe: 0.7,
+    encv: 1,
+    hev1: 0.75,
+    hvc1: 0.75,
+    mjp2: 1,
+    mp4v: 1,
+    mvc1: 1,
+    mvc2: 1,
+    mvc3: 1,
+    mvc4: 1,
+    resv: 1,
+    rv60: 1,
+    s263: 1,
+    svc1: 1,
+    svc2: 1,
+    'vc-1': 1,
+    vp08: 1,
+    vp09: 0.9
+  },
+  text: {
+    stpp: 1,
+    wvtt: 1
+  }
+};
+function isCodecType(codec, type) {
+  const typeCodes = sampleEntryCodesISO[type];
+  return !!typeCodes && !!typeCodes[codec.slice(0, 4)];
+}
+function areCodecsMediaSourceSupported(codecs, type, preferManagedMediaSource = true) {
+  return !codecs.split(',').some(codec => !isCodecMediaSourceSupported(codec, type, preferManagedMediaSource));
+}
+function isCodecMediaSourceSupported(codec, type, preferManagedMediaSource = true) {
+  var _MediaSource$isTypeSu;
+  const MediaSource = getMediaSource(preferManagedMediaSource);
+  return (_MediaSource$isTypeSu = MediaSource == null ? void 0 : MediaSource.isTypeSupported(mimeTypeForCodec(codec, type))) != null ? _MediaSource$isTypeSu : false;
+}
+function mimeTypeForCodec(codec, type) {
+  return `${type}/mp4;codecs=${codec}`;
+}
+function videoCodecPreferenceValue(videoCodec) {
+  if (videoCodec) {
+    const fourCC = videoCodec.substring(0, 4);
+    return sampleEntryCodesISO.video[fourCC];
+  }
+  return 2;
+}
+function codecsSetSelectionPreferenceValue(codecSet) {
+  const limitedHevcSupport = userAgentHevcSupportIsInaccurate();
+  return codecSet.split(',').reduce((num, fourCC) => {
+    const lowerPriority = limitedHevcSupport && isHEVC(fourCC);
+    const preferenceValue = lowerPriority ? 9 : sampleEntryCodesISO.video[fourCC];
+    if (preferenceValue) {
+      return (preferenceValue * 2 + num) / (num ? 3 : 2);
+    }
+    return (sampleEntryCodesISO.audio[fourCC] + num) / (num ? 2 : 1);
+  }, 0);
+}
+const CODEC_COMPATIBLE_NAMES = {};
+function getCodecCompatibleNameLower(lowerCaseCodec, preferManagedMediaSource = true) {
+  if (CODEC_COMPATIBLE_NAMES[lowerCaseCodec]) {
+    return CODEC_COMPATIBLE_NAMES[lowerCaseCodec];
+  }
+  const codecsToCheck = {
+    // Idealy fLaC and Opus would be first (spec-compliant) but
+    // some browsers will report that fLaC is supported then fail.
+    // see: https://bugs.chromium.org/p/chromium/issues/detail?id=1422728
+    flac: ['flac', 'fLaC', 'FLAC'],
+    opus: ['opus', 'Opus'],
+    // Replace audio codec info if browser does not support mp4a.40.34,
+    // and demuxer can fallback to 'audio/mpeg' or 'audio/mp4;codecs="mp3"'
+    'mp4a.40.34': ['mp3']
+  }[lowerCaseCodec];
+  for (let i = 0; i < codecsToCheck.length; i++) {
+    var _getMediaSource;
+    if (isCodecMediaSourceSupported(codecsToCheck[i], 'audio', preferManagedMediaSource)) {
+      CODEC_COMPATIBLE_NAMES[lowerCaseCodec] = codecsToCheck[i];
+      return codecsToCheck[i];
+    } else if (codecsToCheck[i] === 'mp3' && (_getMediaSource = getMediaSource(preferManagedMediaSource)) != null && _getMediaSource.isTypeSupported('audio/mpeg')) {
+      return '';
+    }
+  }
+  return lowerCaseCodec;
+}
+const AUDIO_CODEC_REGEXP = /flac|opus|mp4a\.40\.34/i;
+function getCodecCompatibleName(codec, preferManagedMediaSource = true) {
+  return codec.replace(AUDIO_CODEC_REGEXP, m => getCodecCompatibleNameLower(m.toLowerCase(), preferManagedMediaSource));
+}
+function replaceVideoCodec(originalCodecs, newVideoCodec) {
+  const codecs = [];
+  if (originalCodecs) {
+    const allCodecs = originalCodecs.split(',');
+    for (let i = 0; i < allCodecs.length; i++) {
+      if (!isCodecType(allCodecs[i], 'video')) {
+        codecs.push(allCodecs[i]);
+      }
+    }
+  }
+  if (newVideoCodec) {
+    codecs.push(newVideoCodec);
+  }
+  return codecs.join(',');
+}
+function pickMostCompleteCodecName(parsedCodec, levelCodec) {
+  // Parsing of mp4a codecs strings in mp4-tools from media is incomplete as of d8c6c7a
+  // so use level codec is parsed codec is unavailable or incomplete
+  if (parsedCodec && (parsedCodec.length > 4 || ['ac-3', 'ec-3', 'alac', 'fLaC', 'Opus'].indexOf(parsedCodec) !== -1)) {
+    if (isCodecSupportedAsType(parsedCodec, 'audio') || isCodecSupportedAsType(parsedCodec, 'video')) {
+      return parsedCodec;
+    }
+  }
+  if (levelCodec) {
+    const levelCodecs = levelCodec.split(',');
+    if (levelCodecs.length > 1) {
+      if (parsedCodec) {
+        for (let i = levelCodecs.length; i--;) {
+          if (levelCodecs[i].substring(0, 4) === parsedCodec.substring(0, 4)) {
+            return levelCodecs[i];
+          }
+        }
+      }
+      return levelCodecs[0];
+    }
+  }
+  return levelCodec || parsedCodec;
+}
+function isCodecSupportedAsType(codec, type) {
+  return isCodecType(codec, type) && isCodecMediaSourceSupported(codec, type);
+}
+function convertAVC1ToAVCOTI(videoCodecs) {
+  // Convert avc1 codec string from RFC-4281 to RFC-6381 for MediaSource.isTypeSupported
+  // Examples: avc1.66.30 to avc1.42001e and avc1.77.30,avc1.66.30 to avc1.4d001e,avc1.42001e.
+  const codecs = videoCodecs.split(',');
+  for (let i = 0; i < codecs.length; i++) {
+    const avcdata = codecs[i].split('.');
+    // only convert codec strings starting with avc1 (Examples: avc1.64001f,dvh1.05.07)
+    if (avcdata.length > 2 && avcdata[0] === 'avc1') {
+      codecs[i] = `avc1.${parseInt(avcdata[1]).toString(16)}${('000' + parseInt(avcdata[2]).toString(16)).slice(-4)}`;
+    }
+  }
+  return codecs.join(',');
+}
+function fillInMissingAV01Params(videoCodec) {
+  // Used to fill in incomplete AV1 playlist CODECS strings for mediaCapabilities.decodingInfo queries
+  if (videoCodec.startsWith('av01.')) {
+    const av1params = videoCodec.split('.');
+    const placeholders = ['0', '111', '01', '01', '01', '0'];
+    for (let i = av1params.length; i > 4 && i < 10; i++) {
+      av1params[i] = placeholders[i - 4];
+    }
+    return av1params.join('.');
+  }
+  return videoCodec;
+}
+function getM2TSSupportedAudioTypes(preferManagedMediaSource) {
+  const MediaSource = getMediaSource(preferManagedMediaSource) || {
+    isTypeSupported: () => false
+  };
+  return {
+    mpeg: MediaSource.isTypeSupported('audio/mpeg'),
+    mp3: MediaSource.isTypeSupported('audio/mp4; codecs="mp3"'),
+    ac3: MediaSource.isTypeSupported('audio/mp4; codecs="ac-3"') 
+  };
+}
+function getCodecsForMimeType(mimeType) {
+  return mimeType.replace(/^.+codecs=["']?([^"']+).*$/, '$1');
+}
+
+// @ts-ignore
+const supportedResult = {
+  supported: true,
+  powerEfficient: true,
+  smooth: true
+  // keySystemAccess: null,
+};
+
+// @ts-ignore
+const unsupportedResult = {
+  supported: false,
+  smooth: false,
+  powerEfficient: false
+  // keySystemAccess: null,
+};
+const SUPPORTED_INFO_DEFAULT = {
+  supported: true,
+  configurations: [],
+  decodingInfoResults: [supportedResult]
+};
+function getUnsupportedResult(error, configurations) {
+  return {
+    supported: false,
+    configurations,
+    decodingInfoResults: [unsupportedResult],
+    error
+  };
+}
+function requiresMediaCapabilitiesDecodingInfo(level, audioTracksByGroup, currentVideoRange, currentFrameRate, currentBw, audioPreference) {
+  // Only test support when configuration is exceeds minimum options
+  const videoCodecs = level.videoCodec;
+  const audioGroups = level.audioCodec ? level.audioGroups : null;
+  const audioCodecPreference = audioPreference == null ? void 0 : audioPreference.audioCodec;
+  const channelsPreference = audioPreference == null ? void 0 : audioPreference.channels;
+  const maxChannels = channelsPreference ? parseInt(channelsPreference) : audioCodecPreference ? Infinity : 2;
+  let audioChannels = null;
+  if (audioGroups != null && audioGroups.length) {
+    try {
+      if (audioGroups.length === 1 && audioGroups[0]) {
+        audioChannels = audioTracksByGroup.groups[audioGroups[0]].channels;
+      } else {
+        audioChannels = audioGroups.reduce((acc, groupId) => {
+          if (groupId) {
+            const audioTrackGroup = audioTracksByGroup.groups[groupId];
+            if (!audioTrackGroup) {
+              throw new Error(`Audio track group ${groupId} not found`);
+            }
+            // Sum all channel key values
+            Object.keys(audioTrackGroup.channels).forEach(key => {
+              acc[key] = (acc[key] || 0) + audioTrackGroup.channels[key];
+            });
+          }
+          return acc;
+        }, {
+          2: 0
+        });
+      }
+    } catch (error) {
+      return true;
+    }
+  }
+  return videoCodecs !== undefined && (
+  // Force media capabilities check for HEVC to avoid failure on Windows
+  videoCodecs.split(',').some(videoCodec => isHEVC(videoCodec)) || level.width > 1920 && level.height > 1088 || level.height > 1920 && level.width > 1088 || level.frameRate > Math.max(currentFrameRate, 30) || level.videoRange !== 'SDR' && level.videoRange !== currentVideoRange || level.bitrate > Math.max(currentBw, 8e6)) || !!audioChannels && isFiniteNumber(maxChannels) && Object.keys(audioChannels).some(channels => parseInt(channels) > maxChannels);
+}
+function getMediaDecodingInfoPromise(level, audioTracksByGroup, mediaCapabilities, cache = {}) {
+  const videoCodecs = level.videoCodec;
+  if (!videoCodecs && !level.audioCodec || !mediaCapabilities) {
+    return Promise.resolve(SUPPORTED_INFO_DEFAULT);
+  }
+  const configurations = [];
+  const videoDecodeList = makeVideoConfigurations(level);
+  const videoCount = videoDecodeList.length;
+  const audioDecodeList = makeAudioConfigurations(level, audioTracksByGroup, videoCount > 0);
+  const audioCount = audioDecodeList.length;
+  for (let i = videoCount || 1 * audioCount || 1; i--;) {
+    const configuration = {
+      type: 'media-source'
+    };
+    if (videoCount) {
+      configuration.video = videoDecodeList[i % videoCount];
+    }
+    if (audioCount) {
+      configuration.audio = audioDecodeList[i % audioCount];
+      const audioBitrate = configuration.audio.bitrate;
+      if (configuration.video && audioBitrate) {
+        configuration.video.bitrate -= audioBitrate;
+      }
+    }
+    configurations.push(configuration);
+  }
+  if (videoCodecs) {
+    // Override Windows Firefox HEVC MediaCapabilities result (https://github.com/video-dev/hls.js/issues/7046)
+    const ua = navigator.userAgent;
+    if (videoCodecs.split(',').some(videoCodec => isHEVC(videoCodec)) && userAgentHevcSupportIsInaccurate()) {
+      return Promise.resolve(getUnsupportedResult(new Error(`Overriding Windows Firefox HEVC MediaCapabilities result based on user-agent string: (${ua})`), configurations));
+    }
+  }
+  return Promise.all(configurations.map(configuration => {
+    // Cache MediaCapabilities promises
+    const decodingInfoKey = getMediaDecodingInfoKey(configuration);
+    return cache[decodingInfoKey] || (cache[decodingInfoKey] = mediaCapabilities.decodingInfo(configuration));
+  })).then(decodingInfoResults => ({
+    supported: !decodingInfoResults.some(info => !info.supported),
+    configurations,
+    decodingInfoResults
+  })).catch(error => ({
+    supported: false,
+    configurations,
+    decodingInfoResults: [],
+    error
+  }));
+}
+function makeVideoConfigurations(level) {
+  var _level$videoCodec;
+  const videoCodecs = (_level$videoCodec = level.videoCodec) == null ? void 0 : _level$videoCodec.split(',');
+  const bitrate = getVariantDecodingBitrate(level);
+  const width = level.width || 640;
+  const height = level.height || 480;
+  // Assume a framerate of 30fps since MediaCapabilities will not accept Level default of 0.
+  const framerate = level.frameRate || 30;
+  const videoRange = level.videoRange.toLowerCase();
+  return videoCodecs ? videoCodecs.map(videoCodec => {
+    const videoConfiguration = {
+      contentType: mimeTypeForCodec(fillInMissingAV01Params(videoCodec), 'video'),
+      width,
+      height,
+      bitrate,
+      framerate
+    };
+    if (videoRange !== 'sdr') {
+      videoConfiguration.transferFunction = videoRange;
+    }
+    return videoConfiguration;
+  }) : [];
+}
+function makeAudioConfigurations(level, audioTracksByGroup, hasVideo) {
+  var _level$audioCodec;
+  const audioCodecs = (_level$audioCodec = level.audioCodec) == null ? void 0 : _level$audioCodec.split(',');
+  const combinedBitrate = getVariantDecodingBitrate(level);
+  if (audioCodecs && level.audioGroups) {
+    return level.audioGroups.reduce((configurations, audioGroupId) => {
+      var _audioTracksByGroup$g;
+      const tracks = audioGroupId ? (_audioTracksByGroup$g = audioTracksByGroup.groups[audioGroupId]) == null ? void 0 : _audioTracksByGroup$g.tracks : null;
+      if (tracks) {
+        return tracks.reduce((configs, audioTrack) => {
+          if (audioTrack.groupId === audioGroupId) {
+            const channelsNumber = parseFloat(audioTrack.channels || '');
+            audioCodecs.forEach(audioCodec => {
+              const audioConfiguration = {
+                contentType: mimeTypeForCodec(audioCodec, 'audio'),
+                bitrate: hasVideo ? estimatedAudioBitrate(audioCodec, combinedBitrate) : combinedBitrate
+              };
+              if (channelsNumber) {
+                audioConfiguration.channels = '' + channelsNumber;
+              }
+              configs.push(audioConfiguration);
+            });
+          }
+          return configs;
+        }, configurations);
+      }
+      return configurations;
+    }, []);
+  }
+  return [];
+}
+function estimatedAudioBitrate(audioCodec, levelBitrate) {
+  if (levelBitrate <= 1) {
+    return 1;
+  }
+  let audioBitrate = 128000;
+  if (audioCodec === 'ec-3') {
+    audioBitrate = 768000;
+  } else if (audioCodec === 'ac-3') {
+    audioBitrate = 640000;
+  }
+  return Math.min(levelBitrate / 2, audioBitrate); // Don't exceed some % of level bitrate
+}
+function getVariantDecodingBitrate(level) {
+  return Math.ceil(Math.max(level.bitrate * 0.9, level.averageBitrate) / 1000) * 1000 || 1;
+}
+function getMediaDecodingInfoKey(config) {
+  let key = '';
+  const {
+    audio,
+    video
+  } = config;
+  if (video) {
+    const codec = getCodecsForMimeType(video.contentType);
+    key += `${codec}_r${video.height}x${video.width}f${Math.ceil(video.framerate)}${video.transferFunction || 'sd'}_${Math.ceil(video.bitrate / 1e5)}`;
+  }
+  if (audio) {
+    const codec = getCodecsForMimeType(audio.contentType);
+    key += `${video ? '_' : ''}${codec}_c${audio.channels}`;
+  }
+  return key;
+}
+
+const HdcpLevels = ['NONE', 'TYPE-0', 'TYPE-1', null];
+function isHdcpLevel(value) {
+  return HdcpLevels.indexOf(value) > -1;
+}
+const VideoRangeValues = ['SDR', 'PQ', 'HLG'];
+function isVideoRange(value) {
+  return !!value && VideoRangeValues.indexOf(value) > -1;
+}
+var HlsSkip = {
+  No: "",
+  Yes: "YES",
+  v2: "v2"
+};
+function getSkipValue(details) {
+  const {
+    canSkipUntil,
+    canSkipDateRanges,
+    age
+  } = details;
+  // A Client SHOULD NOT request a Playlist Delta Update unless it already
+  // has a version of the Playlist that is no older than one-half of the Skip Boundary.
+  // @see: https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis#section-6.3.7
+  const playlistRecentEnough = age < canSkipUntil / 2;
+  if (canSkipUntil && playlistRecentEnough) {
+    if (canSkipDateRanges) {
+      return HlsSkip.v2;
+    }
+    return HlsSkip.Yes;
+  }
+  return HlsSkip.No;
+}
+class HlsUrlParameters {
+  constructor(msn, part, skip) {
+    this.msn = void 0;
+    this.part = void 0;
+    this.skip = void 0;
+    this.msn = msn;
+    this.part = part;
+    this.skip = skip;
+  }
+  addDirectives(uri) {
+    const url = new self.URL(uri);
+    if (this.msn !== undefined) {
+      url.searchParams.set('_HLS_msn', this.msn.toString());
+    }
+    if (this.part !== undefined) {
+      url.searchParams.set('_HLS_part', this.part.toString());
+    }
+    if (this.skip) {
+      url.searchParams.set('_HLS_skip', this.skip);
+    }
+    return url.href;
+  }
+}
+class Level {
+  constructor(data) {
+    this._attrs = void 0;
+    this.audioCodec = void 0;
+    this.bitrate = void 0;
+    this.codecSet = void 0;
+    this.url = void 0;
+    this.frameRate = void 0;
+    this.height = void 0;
+    this.id = void 0;
+    this.name = void 0;
+    this.supplemental = void 0;
+    this.videoCodec = void 0;
+    this.width = void 0;
+    this.details = void 0;
+    this.fragmentError = 0;
+    this.loadError = 0;
+    this.loaded = void 0;
+    this.realBitrate = 0;
+    this.supportedPromise = void 0;
+    this.supportedResult = void 0;
+    this._avgBitrate = 0;
+    this._audioGroups = void 0;
+    this._subtitleGroups = void 0;
+    // Deprecated (retained for backwards compatibility)
+    this._urlId = 0;
+    this.url = [data.url];
+    this._attrs = [data.attrs];
+    this.bitrate = data.bitrate;
+    if (data.details) {
+      this.details = data.details;
+    }
+    this.id = data.id || 0;
+    this.name = data.name;
+    this.width = data.width || 0;
+    this.height = data.height || 0;
+    this.frameRate = data.attrs.optionalFloat('FRAME-RATE', 0);
+    this._avgBitrate = data.attrs.decimalInteger('AVERAGE-BANDWIDTH');
+    this.audioCodec = data.audioCodec;
+    this.videoCodec = data.videoCodec;
+    this.codecSet = [data.videoCodec, data.audioCodec].filter(c => !!c).map(s => s.substring(0, 4)).join(',');
+    if ('supplemental' in data) {
+      var _data$supplemental;
+      this.supplemental = data.supplemental;
+      const supplementalVideo = (_data$supplemental = data.supplemental) == null ? void 0 : _data$supplemental.videoCodec;
+      if (supplementalVideo && supplementalVideo !== data.videoCodec) {
+        this.codecSet += `,${supplementalVideo.substring(0, 4)}`;
+      }
+    }
+    this.addGroupId('audio', data.attrs.AUDIO);
+    this.addGroupId('text', data.attrs.SUBTITLES);
+  }
+  get maxBitrate() {
+    return Math.max(this.realBitrate, this.bitrate);
+  }
+  get averageBitrate() {
+    return this._avgBitrate || this.realBitrate || this.bitrate;
+  }
+  get attrs() {
+    return this._attrs[0];
+  }
+  get codecs() {
+    return this.attrs.CODECS || '';
+  }
+  get pathwayId() {
+    return this.attrs['PATHWAY-ID'] || '.';
+  }
+  get videoRange() {
+    return this.attrs['VIDEO-RANGE'] || 'SDR';
+  }
+  get score() {
+    return this.attrs.optionalFloat('SCORE', 0);
+  }
+  get uri() {
+    return this.url[0] || '';
+  }
+  hasAudioGroup(groupId) {
+    return hasGroup(this._audioGroups, groupId);
+  }
+  hasSubtitleGroup(groupId) {
+    return hasGroup(this._subtitleGroups, groupId);
+  }
+  get audioGroups() {
+    return this._audioGroups;
+  }
+  get subtitleGroups() {
+    return this._subtitleGroups;
+  }
+  addGroupId(type, groupId) {
+    if (!groupId) {
+      return;
+    }
+    if (type === 'audio') {
+      let audioGroups = this._audioGroups;
+      if (!audioGroups) {
+        audioGroups = this._audioGroups = [];
+      }
+      if (audioGroups.indexOf(groupId) === -1) {
+        audioGroups.push(groupId);
+      }
+    } else if (type === 'text') {
+      let subtitleGroups = this._subtitleGroups;
+      if (!subtitleGroups) {
+        subtitleGroups = this._subtitleGroups = [];
+      }
+      if (subtitleGroups.indexOf(groupId) === -1) {
+        subtitleGroups.push(groupId);
+      }
+    }
+  }
+
+  // Deprecated methods (retained for backwards compatibility)
+  get urlId() {
+    return 0;
+  }
+  set urlId(value) {}
+  get audioGroupIds() {
+    return this.audioGroups ? [this.audioGroupId] : undefined;
+  }
+  get textGroupIds() {
+    return this.subtitleGroups ? [this.textGroupId] : undefined;
+  }
+  get audioGroupId() {
+    var _this$audioGroups;
+    return (_this$audioGroups = this.audioGroups) == null ? void 0 : _this$audioGroups[0];
+  }
+  get textGroupId() {
+    var _this$subtitleGroups;
+    return (_this$subtitleGroups = this.subtitleGroups) == null ? void 0 : _this$subtitleGroups[0];
+  }
+  addFallback() {}
+}
+function hasGroup(groups, groupId) {
+  if (!groupId || !groups) {
+    return false;
+  }
+  return groups.indexOf(groupId) !== -1;
+}
+
+/**
+ * @returns Whether we can detect and validate HDR capability within the window context
+ */
+function isHdrSupported() {
+  if (typeof matchMedia === 'function') {
+    const mediaQueryList = matchMedia('(dynamic-range: high)');
+    const badQuery = matchMedia('bad query');
+    if (mediaQueryList.media !== badQuery.media) {
+      return mediaQueryList.matches === true;
+    }
+  }
+  return false;
+}
+
+/**
+ * Sanitizes inputs to return the active video selection options for HDR/SDR.
+ * When both inputs are null:
+ *
+ *    `{ preferHDR: false, allowedVideoRanges: [] }`
+ *
+ * When `currentVideoRange` non-null, maintain the active range:
+ *
+ *    `{ preferHDR: currentVideoRange !== 'SDR', allowedVideoRanges: [currentVideoRange] }`
+ *
+ * When VideoSelectionOption non-null:
+ *
+ *  - Allow all video ranges if `allowedVideoRanges` unspecified.
+ *  - If `preferHDR` is non-null use the value to filter `allowedVideoRanges`.
+ *  - Else check window for HDR support and set `preferHDR` to the result.
+ *
+ * @param currentVideoRange
+ * @param videoPreference
+ */
+function getVideoSelectionOptions(currentVideoRange, videoPreference) {
+  let preferHDR = false;
+  let allowedVideoRanges = [];
+  if (currentVideoRange) {
+    preferHDR = currentVideoRange !== 'SDR';
+    allowedVideoRanges = [currentVideoRange];
+  }
+  if (videoPreference) {
+    allowedVideoRanges = videoPreference.allowedVideoRanges || VideoRangeValues.slice(0);
+    const allowAutoPreferHDR = allowedVideoRanges.join('') !== 'SDR' && !videoPreference.videoCodec;
+    preferHDR = videoPreference.preferHDR !== undefined ? videoPreference.preferHDR : allowAutoPreferHDR && isHdrSupported();
+    if (!preferHDR) {
+      allowedVideoRanges = ['SDR'];
+    }
+  }
+  return {
+    preferHDR,
+    allowedVideoRanges
+  };
+}
+
+const omitCircularRefsReplacer = replacer => {
+  const known = new WeakSet();
+  return (_, value) => {
+    if (replacer) {
+      value = replacer(_, value);
+    }
+    if (typeof value === 'object' && value !== null) {
+      if (known.has(value)) {
+        return;
+      }
+      known.add(value);
+    }
+    return value;
+  };
+};
+const stringify = (object, replacer) => JSON.stringify(object, omitCircularRefsReplacer(replacer));
+
+function getStartCodecTier(codecTiers, currentVideoRange, currentBw, audioPreference, videoPreference) {
+  const codecSets = Object.keys(codecTiers);
+  const channelsPreference = audioPreference == null ? void 0 : audioPreference.channels;
+  const audioCodecPreference = audioPreference == null ? void 0 : audioPreference.audioCodec;
+  const videoCodecPreference = videoPreference == null ? void 0 : videoPreference.videoCodec;
+  const preferStereo = channelsPreference && parseInt(channelsPreference) === 2;
+  // Use first level set to determine stereo, and minimum resolution and framerate
+  let hasStereo = false;
+  let hasCurrentVideoRange = false;
+  let minHeight = Infinity;
+  let minFramerate = Infinity;
+  let minBitrate = Infinity;
+  let minIndex = Infinity;
+  let selectedScore = 0;
+  let videoRanges = [];
+  const {
+    preferHDR,
+    allowedVideoRanges
+  } = getVideoSelectionOptions(currentVideoRange, videoPreference);
+  for (let i = codecSets.length; i--;) {
+    const tier = codecTiers[codecSets[i]];
+    hasStereo || (hasStereo = tier.channels[2] > 0);
+    minHeight = Math.min(minHeight, tier.minHeight);
+    minFramerate = Math.min(minFramerate, tier.minFramerate);
+    minBitrate = Math.min(minBitrate, tier.minBitrate);
+    const matchingVideoRanges = allowedVideoRanges.filter(range => tier.videoRanges[range] > 0);
+    if (matchingVideoRanges.length > 0) {
+      hasCurrentVideoRange = true;
+    }
+  }
+  minHeight = isFiniteNumber(minHeight) ? minHeight : 0;
+  minFramerate = isFiniteNumber(minFramerate) ? minFramerate : 0;
+  const maxHeight = Math.max(1080, minHeight);
+  const maxFramerate = Math.max(30, minFramerate);
+  minBitrate = isFiniteNumber(minBitrate) ? minBitrate : currentBw;
+  currentBw = Math.max(minBitrate, currentBw);
+  // If there are no variants with matching preference, set currentVideoRange to undefined
+  if (!hasCurrentVideoRange) {
+    currentVideoRange = undefined;
+  }
+  const hasMultipleSets = codecSets.length > 1;
+  const codecSet = codecSets.reduce((selected, candidate) => {
+    // Remove candiates which do not meet bitrate, default audio, stereo or channels preference, 1080p or lower, 30fps or lower, or SDR/HDR selection if present
+    const candidateTier = codecTiers[candidate];
+    if (candidate === selected) {
+      return selected;
+    }
+    videoRanges = hasCurrentVideoRange ? allowedVideoRanges.filter(range => candidateTier.videoRanges[range] > 0) : [];
+    if (hasMultipleSets) {
+      if (candidateTier.minBitrate > currentBw) {
+        logStartCodecCandidateIgnored(candidate, `min bitrate of ${candidateTier.minBitrate} > current estimate of ${currentBw}`);
+        return selected;
+      }
+      if (!candidateTier.hasDefaultAudio) {
+        logStartCodecCandidateIgnored(candidate, `no renditions with default or auto-select sound found`);
+        return selected;
+      }
+      if (audioCodecPreference && candidate.indexOf(audioCodecPreference.substring(0, 4)) % 5 !== 0) {
+        logStartCodecCandidateIgnored(candidate, `audio codec preference "${audioCodecPreference}" not found`);
+        return selected;
+      }
+      if (channelsPreference && !preferStereo) {
+        if (!candidateTier.channels[channelsPreference]) {
+          logStartCodecCandidateIgnored(candidate, `no renditions with ${channelsPreference} channel sound found (channels options: ${Object.keys(candidateTier.channels)})`);
+          return selected;
+        }
+      } else if ((!audioCodecPreference || preferStereo) && hasStereo && candidateTier.channels['2'] === 0) {
+        logStartCodecCandidateIgnored(candidate, `no renditions with stereo sound found`);
+        return selected;
+      }
+      if (candidateTier.minHeight > maxHeight) {
+        logStartCodecCandidateIgnored(candidate, `min resolution of ${candidateTier.minHeight} > maximum of ${maxHeight}`);
+        return selected;
+      }
+      if (candidateTier.minFramerate > maxFramerate) {
+        logStartCodecCandidateIgnored(candidate, `min framerate of ${candidateTier.minFramerate} > maximum of ${maxFramerate}`);
+        return selected;
+      }
+      if (!videoRanges.some(range => candidateTier.videoRanges[range] > 0)) {
+        logStartCodecCandidateIgnored(candidate, `no variants with VIDEO-RANGE of ${stringify(videoRanges)} found`);
+        return selected;
+      }
+      if (videoCodecPreference && candidate.indexOf(videoCodecPreference.substring(0, 4)) % 5 !== 0) {
+        logStartCodecCandidateIgnored(candidate, `video codec preference "${videoCodecPreference}" not found`);
+        return selected;
+      }
+      if (candidateTier.maxScore < selectedScore) {
+        logStartCodecCandidateIgnored(candidate, `max score of ${candidateTier.maxScore} < selected max of ${selectedScore}`);
+        return selected;
+      }
+    }
+    // Remove candiates with less preferred codecs or more errors
+    if (selected && (codecsSetSelectionPreferenceValue(candidate) >= codecsSetSelectionPreferenceValue(selected) || candidateTier.fragmentError > codecTiers[selected].fragmentError)) {
+      return selected;
+    }
+    minIndex = candidateTier.minIndex;
+    selectedScore = candidateTier.maxScore;
+    return candidate;
+  }, undefined);
+  return {
+    codecSet,
+    videoRanges,
+    preferHDR,
+    minFramerate,
+    minBitrate,
+    minIndex
+  };
+}
+function logStartCodecCandidateIgnored(codeSet, reason) {
+  logger.log(`[abr] start candidates with "${codeSet}" ignored because ${reason}`);
+}
+function getAudioTracksByGroup(allAudioTracks) {
+  return allAudioTracks.reduce((audioTracksByGroup, track) => {
+    let trackGroup = audioTracksByGroup.groups[track.groupId];
+    if (!trackGroup) {
+      trackGroup = audioTracksByGroup.groups[track.groupId] = {
+        tracks: [],
+        channels: {
+          2: 0
+        },
+        hasDefault: false,
+        hasAutoSelect: false
+      };
+    }
+    trackGroup.tracks.push(track);
+    const channelsKey = track.channels || '2';
+    trackGroup.channels[channelsKey] = (trackGroup.channels[channelsKey] || 0) + 1;
+    trackGroup.hasDefault = trackGroup.hasDefault || track.default;
+    trackGroup.hasAutoSelect = trackGroup.hasAutoSelect || track.autoselect;
+    if (trackGroup.hasDefault) {
+      audioTracksByGroup.hasDefaultAudio = true;
+    }
+    if (trackGroup.hasAutoSelect) {
+      audioTracksByGroup.hasAutoSelectAudio = true;
+    }
+    return audioTracksByGroup;
+  }, {
+    hasDefaultAudio: false,
+    hasAutoSelectAudio: false,
+    groups: {}
+  });
+}
+function getCodecTiers(levels, audioTracksByGroup, minAutoLevel, maxAutoLevel) {
+  return levels.slice(minAutoLevel, maxAutoLevel + 1).reduce((tiers, level, index) => {
+    if (!level.codecSet) {
+      return tiers;
+    }
+    const audioGroups = level.audioGroups;
+    let tier = tiers[level.codecSet];
+    if (!tier) {
+      tiers[level.codecSet] = tier = {
+        minBitrate: Infinity,
+        minHeight: Infinity,
+        minFramerate: Infinity,
+        minIndex: index,
+        maxScore: 0,
+        videoRanges: {
+          SDR: 0
+        },
+        channels: {
+          '2': 0
+        },
+        hasDefaultAudio: !audioGroups,
+        fragmentError: 0
+      };
+    }
+    tier.minBitrate = Math.min(tier.minBitrate, level.bitrate);
+    const lesserWidthOrHeight = Math.min(level.height, level.width);
+    tier.minHeight = Math.min(tier.minHeight, lesserWidthOrHeight);
+    tier.minFramerate = Math.min(tier.minFramerate, level.frameRate);
+    tier.minIndex = Math.min(tier.minIndex, index);
+    tier.maxScore = Math.max(tier.maxScore, level.score);
+    tier.fragmentError += level.fragmentError;
+    tier.videoRanges[level.videoRange] = (tier.videoRanges[level.videoRange] || 0) + 1;
+    if (audioGroups) {
+      audioGroups.forEach(audioGroupId => {
+        if (!audioGroupId) {
+          return;
+        }
+        const audioGroup = audioTracksByGroup.groups[audioGroupId];
+        if (!audioGroup) {
+          return;
+        }
+        // Default audio is any group with DEFAULT=YES, or if missing then any group with AUTOSELECT=YES, or all variants
+        tier.hasDefaultAudio = tier.hasDefaultAudio || audioTracksByGroup.hasDefaultAudio ? audioGroup.hasDefault : audioGroup.hasAutoSelect || !audioTracksByGroup.hasDefaultAudio && !audioTracksByGroup.hasAutoSelectAudio;
+        Object.keys(audioGroup.channels).forEach(channels => {
+          tier.channels[channels] = (tier.channels[channels] || 0) + audioGroup.channels[channels];
+        });
+      });
+    }
+    return tiers;
+  }, {});
+}
+function getBasicSelectionOption(option) {
+  if (!option) {
+    return option;
+  }
+  const {
+    lang,
+    assocLang,
+    characteristics,
+    channels,
+    audioCodec
+  } = option;
+  return {
+    lang,
+    assocLang,
+    characteristics,
+    channels,
+    audioCodec
+  };
+}
+function findMatchingOption(option, tracks, matchPredicate) {
+  if ('attrs' in option) {
+    const index = tracks.indexOf(option);
+    if (index !== -1) {
+      return index;
+    }
+  }
+  for (let i = 0; i < tracks.length; i++) {
+    const track = tracks[i];
+    if (matchesOption(option, track, matchPredicate)) {
+      return i;
+    }
+  }
+  return -1;
+}
+function matchesOption(option, track, matchPredicate) {
+  const {
+    groupId,
+    name,
+    lang,
+    assocLang,
+    default: isDefault
+  } = option;
+  const forced = option.forced;
+  return (groupId === undefined || track.groupId === groupId) && (name === undefined || track.name === name) && (lang === undefined || languagesMatch(lang, track.lang)) && (lang === undefined || track.assocLang === assocLang) && (isDefault === undefined || track.default === isDefault) && (forced === undefined || track.forced === forced) && (!('characteristics' in option) || characteristicsMatch(option.characteristics || '', track.characteristics)) && (matchPredicate === undefined || matchPredicate(option, track));
+}
+function languagesMatch(languageA, languageB = '--') {
+  if (languageA.length === languageB.length) {
+    return languageA === languageB;
+  }
+  return languageA.startsWith(languageB) || languageB.startsWith(languageA);
+}
+function characteristicsMatch(characteristicsA, characteristicsB = '') {
+  const arrA = characteristicsA.split(',');
+  const arrB = characteristicsB.split(',');
+  // Expects each item to be unique:
+  return arrA.length === arrB.length && !arrA.some(el => arrB.indexOf(el) === -1);
+}
+function audioMatchPredicate(option, track) {
+  const {
+    audioCodec,
+    channels
+  } = option;
+  return (audioCodec === undefined || (track.audioCodec || '').substring(0, 4) === audioCodec.substring(0, 4)) && (channels === undefined || channels === (track.channels || '2'));
+}
+function findClosestLevelWithAudioGroup(option, levels, allAudioTracks, searchIndex, matchPredicate) {
+  const currentLevel = levels[searchIndex];
+  // Are there variants with same URI as current level?
+  // If so, find a match that does not require any level URI change
+  const variants = levels.reduce((variantMap, level, index) => {
+    const uri = level.uri;
+    const renditions = variantMap[uri] || (variantMap[uri] = []);
+    renditions.push(index);
+    return variantMap;
+  }, {});
+  const renditions = variants[currentLevel.uri];
+  if (renditions.length > 1) {
+    searchIndex = Math.max.apply(Math, renditions);
+  }
+  // Find best match
+  const currentVideoRange = currentLevel.videoRange;
+  const currentFrameRate = currentLevel.frameRate;
+  const currentVideoCodec = currentLevel.codecSet.substring(0, 4);
+  const matchingVideo = searchDownAndUpList(levels, searchIndex, level => {
+    if (level.videoRange !== currentVideoRange || level.frameRate !== currentFrameRate || level.codecSet.substring(0, 4) !== currentVideoCodec) {
+      return false;
+    }
+    const audioGroups = level.audioGroups;
+    const tracks = allAudioTracks.filter(track => !audioGroups || audioGroups.indexOf(track.groupId) !== -1);
+    return findMatchingOption(option, tracks, matchPredicate) > -1;
+  });
+  if (matchingVideo > -1) {
+    return matchingVideo;
+  }
+  return searchDownAndUpList(levels, searchIndex, level => {
+    const audioGroups = level.audioGroups;
+    const tracks = allAudioTracks.filter(track => !audioGroups || audioGroups.indexOf(track.groupId) !== -1);
+    return findMatchingOption(option, tracks, matchPredicate) > -1;
+  });
+}
+function searchDownAndUpList(arr, searchIndex, predicate) {
+  for (let i = searchIndex; i > -1; i--) {
+    if (predicate(arr[i])) {
+      return i;
+    }
+  }
+  for (let i = searchIndex + 1; i < arr.length; i++) {
+    if (predicate(arr[i])) {
+      return i;
+    }
+  }
+  return -1;
+}
+function useAlternateAudio(audioTrackUrl, hls) {
+  var _hls$loadLevelObj;
+  return !!audioTrackUrl && audioTrackUrl !== ((_hls$loadLevelObj = hls.loadLevelObj) == null ? void 0 : _hls$loadLevelObj.uri);
+}
+
+class AbrController extends Logger {
+  constructor(_hls) {
+    super('abr', _hls.logger);
+    this.hls = void 0;
+    this.lastLevelLoadSec = 0;
+    this.lastLoadedFragLevel = -1;
+    this.firstSelection = -1;
+    this._nextAutoLevel = -1;
+    this.nextAutoLevelKey = '';
+    this.audioTracksByGroup = null;
+    this.codecTiers = null;
+    this.timer = -1;
+    this.fragCurrent = null;
+    this.partCurrent = null;
+    this.bitrateTestDelay = 0;
+    this.rebufferNotice = -1;
+    this.supportedCache = {};
+    this.bwEstimator = void 0;
+    /*
+        This method monitors the download rate of the current fragment, and will downswitch if that fragment will not load
+        quickly enough to prevent underbuffering
+      */
+    this._abandonRulesCheck = levelLoaded => {
+      var _ref;
+      const {
+        fragCurrent: frag,
+        partCurrent: part,
+        hls
+      } = this;
+      const {
+        autoLevelEnabled,
+        media
+      } = hls;
+      if (!frag || !media) {
+        return;
+      }
+      const now = performance.now();
+      const stats = part ? part.stats : frag.stats;
+      const duration = part ? part.duration : frag.duration;
+      const timeLoading = now - stats.loading.start;
+      const minAutoLevel = hls.minAutoLevel;
+      const loadingFragForLevel = frag.level;
+      const currentAutoLevel = this._nextAutoLevel;
+      // If frag loading is aborted, complete, or from lowest level, stop timer and return
+      if (stats.aborted || stats.loaded && stats.loaded === stats.total || loadingFragForLevel <= minAutoLevel) {
+        this.clearTimer();
+        // reset forced auto level value so that next level will be selected
+        this._nextAutoLevel = -1;
+        return;
+      }
+
+      // This check only runs if we're in ABR mode
+      if (!autoLevelEnabled) {
+        return;
+      }
+
+      // Must be loading/loaded a new level or be in a playing state
+      const fragBlockingSwitch = currentAutoLevel > -1 && currentAutoLevel !== loadingFragForLevel;
+      const levelChange = !!levelLoaded || fragBlockingSwitch;
+      if (!levelChange && (media.paused || !media.playbackRate || !media.readyState)) {
+        return;
+      }
+      const bufferInfo = hls.mainForwardBufferInfo;
+      if (!levelChange && bufferInfo === null) {
+        return;
+      }
+      const ttfbEstimate = this.bwEstimator.getEstimateTTFB();
+      const playbackRate = Math.abs(media.playbackRate);
+      // To maintain stable adaptive playback, only begin monitoring frag loading after half or more of its playback duration has passed
+      if (timeLoading <= Math.max(ttfbEstimate, 1000 * (duration / (playbackRate * 2)))) {
+        return;
+      }
+
+      // bufferStarvationDelay is an estimate of the amount time (in seconds) it will take to exhaust the buffer
+      const bufferStarvationDelay = bufferInfo ? bufferInfo.len / playbackRate : 0;
+      const ttfb = stats.loading.first ? stats.loading.first - stats.loading.start : -1;
+      const loadedFirstByte = stats.loaded && ttfb > -1;
+      const bwEstimate = this.getBwEstimate();
+      const levels = hls.levels;
+      const level = levels[loadingFragForLevel];
+      const expectedLen = Math.max(stats.loaded, Math.round(duration * (frag.bitrate || level.averageBitrate) / 8));
+      let timeStreaming = loadedFirstByte ? timeLoading - ttfb : timeLoading;
+      if (timeStreaming < 1 && loadedFirstByte) {
+        timeStreaming = Math.min(timeLoading, stats.loaded * 8 / bwEstimate);
+      }
+      const loadRate = loadedFirstByte ? stats.loaded * 1000 / timeStreaming : 0;
+      // fragLoadDelay is an estimate of the time (in seconds) it will take to buffer the remainder of the fragment
+      const ttfbSeconds = ttfbEstimate / 1000;
+      const fragLoadedDelay = loadRate ? (expectedLen - stats.loaded) / loadRate : expectedLen * 8 / bwEstimate + ttfbSeconds;
+      // Only downswitch if the time to finish loading the current fragment is greater than the amount of buffer left
+      if (fragLoadedDelay <= bufferStarvationDelay) {
+        return;
+      }
+      const bwe = loadRate ? loadRate * 8 : bwEstimate;
+      const live = ((_ref = (levelLoaded == null ? void 0 : levelLoaded.details) || this.hls.latestLevelDetails) == null ? void 0 : _ref.live) === true;
+      const abrBandWidthUpFactor = this.hls.config.abrBandWidthUpFactor;
+      let fragLevelNextLoadedDelay = Number.POSITIVE_INFINITY;
+      let nextLoadLevel;
+      // Iterate through lower level and try to find the largest one that avoids rebuffering
+      for (nextLoadLevel = loadingFragForLevel - 1; nextLoadLevel > minAutoLevel; nextLoadLevel--) {
+        // compute time to load next fragment at lower level
+        // 8 = bits per byte (bps/Bps)
+        const levelNextBitrate = levels[nextLoadLevel].maxBitrate;
+        const requiresLevelLoad = !levels[nextLoadLevel].details || live;
+        fragLevelNextLoadedDelay = this.getTimeToLoadFrag(ttfbSeconds, bwe, duration * levelNextBitrate, requiresLevelLoad);
+        if (fragLevelNextLoadedDelay < Math.min(bufferStarvationDelay, duration + ttfbSeconds)) {
+          break;
+        }
+      }
+      // Only emergency switch down if it takes less time to load a new fragment at lowest level instead of continuing
+      // to load the current one
+      if (fragLevelNextLoadedDelay >= fragLoadedDelay) {
+        return;
+      }
+
+      // if estimated load time of new segment is completely unreasonable, ignore and do not emergency switch down
+      if (fragLevelNextLoadedDelay > duration * 10) {
+        return;
+      }
+      if (loadedFirstByte) {
+        // If there has been loading progress, sample bandwidth using loading time offset by minimum TTFB time
+        this.bwEstimator.sample(timeLoading - Math.min(ttfbEstimate, ttfb), stats.loaded);
+      } else {
+        // If there has been no loading progress, sample TTFB
+        this.bwEstimator.sampleTTFB(timeLoading);
+      }
+      const nextLoadLevelBitrate = levels[nextLoadLevel].maxBitrate;
+      if (this.getBwEstimate() * abrBandWidthUpFactor > nextLoadLevelBitrate) {
+        this.resetEstimator(nextLoadLevelBitrate);
+      }
+      const bestSwitchLevel = this.findBestLevel(nextLoadLevelBitrate, minAutoLevel, nextLoadLevel, 0, bufferStarvationDelay, 1, 1);
+      if (bestSwitchLevel > -1) {
+        nextLoadLevel = bestSwitchLevel;
+      }
+      this.warn(`Fragment ${frag.sn}${part ? ' part ' + part.index : ''} of level ${loadingFragForLevel} is loading too slowly;
+      Fragment duration: ${frag.duration.toFixed(3)}
+      Time to underbuffer: ${bufferStarvationDelay.toFixed(3)} s
+      Estimated load time for current fragment: ${fragLoadedDelay.toFixed(3)} s
+      Estimated load time for down switch fragment: ${fragLevelNextLoadedDelay.toFixed(3)} s
+      TTFB estimate: ${ttfb | 0} ms
+      Current BW estimate: ${isFiniteNumber(bwEstimate) ? bwEstimate | 0 : 'Unknown'} bps
+      New BW estimate: ${this.getBwEstimate() | 0} bps
+      Switching to level ${nextLoadLevel} @ ${nextLoadLevelBitrate | 0} bps`);
+      hls.nextLoadLevel = hls.nextAutoLevel = nextLoadLevel;
+      this.clearTimer();
+      const abortAndSwitch = () => {
+        // Are nextLoadLevel details available or is stream-controller still in "WAITING_LEVEL" state?
+        this.clearTimer();
+        if (this.fragCurrent === frag && this.hls.loadLevel === nextLoadLevel && nextLoadLevel > 0) {
+          const bufferStarvationDelay = this.getStarvationDelay();
+          this.warn(`Aborting inflight request ${nextLoadLevel > 0 ? 'and switching down' : ''}
+      Fragment duration: ${frag.duration.toFixed(3)} s
+      Time to underbuffer: ${bufferStarvationDelay.toFixed(3)} s`);
+          frag.abortRequests();
+          this.fragCurrent = this.partCurrent = null;
+          if (nextLoadLevel > minAutoLevel) {
+            let lowestSwitchLevel = this.findBestLevel(this.hls.levels[minAutoLevel].bitrate, minAutoLevel, nextLoadLevel, 0, bufferStarvationDelay, 1, 1);
+            if (lowestSwitchLevel === -1) {
+              lowestSwitchLevel = minAutoLevel;
+            }
+            this.hls.nextLoadLevel = this.hls.nextAutoLevel = lowestSwitchLevel;
+            this.resetEstimator(this.hls.levels[lowestSwitchLevel].bitrate);
+          }
+        }
+      };
+      if (fragBlockingSwitch || fragLoadedDelay > fragLevelNextLoadedDelay * 2) {
+        abortAndSwitch();
+      } else {
+        this.timer = self.setInterval(abortAndSwitch, fragLevelNextLoadedDelay * 1000);
+      }
+      hls.trigger(Events.FRAG_LOAD_EMERGENCY_ABORTED, {
+        frag,
+        part,
+        stats
+      });
+    };
+    this.hls = _hls;
+    this.bwEstimator = this.initEstimator();
+    this.registerListeners();
+  }
+  resetEstimator(abrEwmaDefaultEstimate) {
+    if (abrEwmaDefaultEstimate) {
+      this.log(`setting initial bwe to ${abrEwmaDefaultEstimate}`);
+      this.hls.config.abrEwmaDefaultEstimate = abrEwmaDefaultEstimate;
+    }
+    this.firstSelection = -1;
+    this.bwEstimator = this.initEstimator();
+  }
+  initEstimator() {
+    const config = this.hls.config;
+    return new EwmaBandWidthEstimator(config.abrEwmaSlowVoD, config.abrEwmaFastVoD, config.abrEwmaDefaultEstimate);
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.FRAG_LOADING, this.onFragLoading, this);
+    hls.on(Events.FRAG_LOADED, this.onFragLoaded, this);
+    hls.on(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+    hls.on(Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
+    hls.on(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.on(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.on(Events.MAX_AUTO_LEVEL_UPDATED, this.onMaxAutoLevelUpdated, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    if (!hls) {
+      return;
+    }
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.FRAG_LOADING, this.onFragLoading, this);
+    hls.off(Events.FRAG_LOADED, this.onFragLoaded, this);
+    hls.off(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+    hls.off(Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
+    hls.off(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.off(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.off(Events.MAX_AUTO_LEVEL_UPDATED, this.onMaxAutoLevelUpdated, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.clearTimer();
+    // @ts-ignore
+    this.hls = this._abandonRulesCheck = this.supportedCache = null;
+    this.fragCurrent = this.partCurrent = null;
+  }
+  onManifestLoading(event, data) {
+    this.lastLoadedFragLevel = -1;
+    this.firstSelection = -1;
+    this.lastLevelLoadSec = 0;
+    this.supportedCache = {};
+    this.fragCurrent = this.partCurrent = null;
+    this.onLevelsUpdated();
+    this.clearTimer();
+  }
+  onLevelsUpdated() {
+    if (this.lastLoadedFragLevel > -1 && this.fragCurrent) {
+      this.lastLoadedFragLevel = this.fragCurrent.level;
+    }
+    this._nextAutoLevel = -1;
+    this.onMaxAutoLevelUpdated();
+    this.codecTiers = null;
+    this.audioTracksByGroup = null;
+  }
+  onMaxAutoLevelUpdated() {
+    this.firstSelection = -1;
+    this.nextAutoLevelKey = '';
+  }
+  onFragLoading(event, data) {
+    const frag = data.frag;
+    if (this.ignoreFragment(frag)) {
+      return;
+    }
+    if (!frag.bitrateTest) {
+      var _data$part;
+      this.fragCurrent = frag;
+      this.partCurrent = (_data$part = data.part) != null ? _data$part : null;
+    }
+    this.clearTimer();
+    this.timer = self.setInterval(this._abandonRulesCheck, 100);
+  }
+  onLevelSwitching(event, data) {
+    this.clearTimer();
+  }
+  onError(event, data) {
+    if (data.fatal) {
+      return;
+    }
+    switch (data.details) {
+      case ErrorDetails.BUFFER_ADD_CODEC_ERROR:
+      case ErrorDetails.BUFFER_APPEND_ERROR:
+        // Reset last loaded level so that a new selection can be made after calling recoverMediaError
+        this.lastLoadedFragLevel = -1;
+        this.firstSelection = -1;
+        break;
+      case ErrorDetails.FRAG_LOAD_TIMEOUT:
+        {
+          const frag = data.frag;
+          const {
+            fragCurrent,
+            partCurrent: part
+          } = this;
+          if (frag && fragCurrent && frag.sn === fragCurrent.sn && frag.level === fragCurrent.level) {
+            const now = performance.now();
+            const stats = part ? part.stats : frag.stats;
+            const timeLoading = now - stats.loading.start;
+            const ttfb = stats.loading.first ? stats.loading.first - stats.loading.start : -1;
+            const loadedFirstByte = stats.loaded && ttfb > -1;
+            if (loadedFirstByte) {
+              const ttfbEstimate = this.bwEstimator.getEstimateTTFB();
+              this.bwEstimator.sample(timeLoading - Math.min(ttfbEstimate, ttfb), stats.loaded);
+            } else {
+              this.bwEstimator.sampleTTFB(timeLoading);
+            }
+          }
+          break;
+        }
+    }
+  }
+  getTimeToLoadFrag(timeToFirstByteSec, bandwidth, fragSizeBits, isSwitch) {
+    const fragLoadSec = timeToFirstByteSec + fragSizeBits / bandwidth;
+    const playlistLoadSec = isSwitch ? timeToFirstByteSec + this.lastLevelLoadSec : 0;
+    return fragLoadSec + playlistLoadSec;
+  }
+  onLevelLoaded(event, data) {
+    const config = this.hls.config;
+    const {
+      loading
+    } = data.stats;
+    const timeLoadingMs = loading.end - loading.first;
+    if (isFiniteNumber(timeLoadingMs)) {
+      this.lastLevelLoadSec = timeLoadingMs / 1000;
+    }
+    if (data.details.live) {
+      this.bwEstimator.update(config.abrEwmaSlowLive, config.abrEwmaFastLive);
+    } else {
+      this.bwEstimator.update(config.abrEwmaSlowVoD, config.abrEwmaFastVoD);
+    }
+    if (this.timer > -1) {
+      this._abandonRulesCheck(data.levelInfo);
+    }
+  }
+  onFragLoaded(event, {
+    frag,
+    part
+  }) {
+    const stats = part ? part.stats : frag.stats;
+    if (frag.type === PlaylistLevelType.MAIN) {
+      this.bwEstimator.sampleTTFB(stats.loading.first - stats.loading.start);
+    }
+    if (this.ignoreFragment(frag)) {
+      return;
+    }
+    // stop monitoring bw once frag loaded
+    this.clearTimer();
+    // reset forced auto level value so that next level will be selected
+    if (frag.level === this._nextAutoLevel) {
+      this._nextAutoLevel = -1;
+    }
+    this.firstSelection = -1;
+
+    // compute level average bitrate
+    if (this.hls.config.abrMaxWithRealBitrate) {
+      const duration = part ? part.duration : frag.duration;
+      const level = this.hls.levels[frag.level];
+      const loadedBytes = (level.loaded ? level.loaded.bytes : 0) + stats.loaded;
+      const loadedDuration = (level.loaded ? level.loaded.duration : 0) + duration;
+      level.loaded = {
+        bytes: loadedBytes,
+        duration: loadedDuration
+      };
+      level.realBitrate = Math.round(8 * loadedBytes / loadedDuration);
+    }
+    if (frag.bitrateTest) {
+      const fragBufferedData = {
+        stats,
+        frag,
+        part,
+        id: frag.type
+      };
+      this.onFragBuffered(Events.FRAG_BUFFERED, fragBufferedData);
+      frag.bitrateTest = false;
+    } else {
+      // store level id after successful fragment load for playback
+      this.lastLoadedFragLevel = frag.level;
+    }
+  }
+  onFragBuffered(event, data) {
+    const {
+      frag,
+      part
+    } = data;
+    const stats = part != null && part.stats.loaded ? part.stats : frag.stats;
+    if (stats.aborted) {
+      return;
+    }
+    if (this.ignoreFragment(frag)) {
+      return;
+    }
+    // Use the difference between parsing and request instead of buffering and request to compute fragLoadingProcessing;
+    // rationale is that buffer appending only happens once media is attached. This can happen when config.startFragPrefetch
+    // is used. If we used buffering in that case, our BW estimate sample will be very large.
+    const processingMs = stats.parsing.end - stats.loading.start - Math.min(stats.loading.first - stats.loading.start, this.bwEstimator.getEstimateTTFB());
+    this.bwEstimator.sample(processingMs, stats.loaded);
+    stats.bwEstimate = this.getBwEstimate();
+    if (frag.bitrateTest) {
+      this.bitrateTestDelay = processingMs / 1000;
+    } else {
+      this.bitrateTestDelay = 0;
+    }
+  }
+  ignoreFragment(frag) {
+    // Only count non-alt-audio frags which were actually buffered in our BW calculations
+    return frag.type !== PlaylistLevelType.MAIN || frag.sn === 'initSegment';
+  }
+  clearTimer() {
+    if (this.timer > -1) {
+      self.clearInterval(this.timer);
+      this.timer = -1;
+    }
+  }
+  get firstAutoLevel() {
+    const {
+      maxAutoLevel,
+      minAutoLevel
+    } = this.hls;
+    const bwEstimate = this.getBwEstimate();
+    const maxStartDelay = this.hls.config.maxStarvationDelay;
+    const abrAutoLevel = this.findBestLevel(bwEstimate, minAutoLevel, maxAutoLevel, 0, maxStartDelay, 1, 1);
+    if (abrAutoLevel > -1) {
+      return abrAutoLevel;
+    }
+    const firstLevel = this.hls.firstLevel;
+    const clamped = Math.min(Math.max(firstLevel, minAutoLevel), maxAutoLevel);
+    this.warn(`Could not find best starting auto level. Defaulting to first in playlist ${firstLevel} clamped to ${clamped}`);
+    return clamped;
+  }
+  get forcedAutoLevel() {
+    if (this.nextAutoLevelKey) {
+      return -1;
+    }
+    return this._nextAutoLevel;
+  }
+
+  // return next auto level
+  get nextAutoLevel() {
+    const forcedAutoLevel = this.forcedAutoLevel;
+    const bwEstimator = this.bwEstimator;
+    const useEstimate = bwEstimator.canEstimate();
+    const loadedFirstFrag = this.lastLoadedFragLevel > -1;
+    // in case next auto level has been forced, and bw not available or not reliable, return forced value
+    if (forcedAutoLevel !== -1 && (!useEstimate || !loadedFirstFrag || this.nextAutoLevelKey === this.getAutoLevelKey())) {
+      return forcedAutoLevel;
+    }
+
+    // compute next level using ABR logic
+    const nextABRAutoLevel = useEstimate && loadedFirstFrag ? this.getNextABRAutoLevel() : this.firstAutoLevel;
+
+    // use forced auto level while it hasn't errored more than ABR selection
+    if (forcedAutoLevel !== -1) {
+      const levels = this.hls.levels;
+      if (levels.length > Math.max(forcedAutoLevel, nextABRAutoLevel) && levels[forcedAutoLevel].loadError <= levels[nextABRAutoLevel].loadError) {
+        return forcedAutoLevel;
+      }
+    }
+
+    // save result until state has changed
+    this._nextAutoLevel = nextABRAutoLevel;
+    this.nextAutoLevelKey = this.getAutoLevelKey();
+    return nextABRAutoLevel;
+  }
+  getAutoLevelKey() {
+    return `${this.getBwEstimate()}_${this.getStarvationDelay().toFixed(2)}`;
+  }
+  getNextABRAutoLevel() {
+    const {
+      fragCurrent,
+      partCurrent,
+      hls
+    } = this;
+    if (hls.levels.length <= 1) {
+      return hls.loadLevel;
+    }
+    const {
+      maxAutoLevel,
+      config,
+      minAutoLevel
+    } = hls;
+    const currentFragDuration = partCurrent ? partCurrent.duration : fragCurrent ? fragCurrent.duration : 0;
+    const avgbw = this.getBwEstimate();
+    // bufferStarvationDelay is the wall-clock time left until the playback buffer is exhausted.
+    const bufferStarvationDelay = this.getStarvationDelay();
+    let bwFactor = config.abrBandWidthFactor;
+    let bwUpFactor = config.abrBandWidthUpFactor;
+
+    // First, look to see if we can find a level matching with our avg bandwidth AND that could also guarantee no rebuffering at all
+    if (bufferStarvationDelay) {
+      const _bestLevel = this.findBestLevel(avgbw, minAutoLevel, maxAutoLevel, bufferStarvationDelay, 0, bwFactor, bwUpFactor);
+      if (_bestLevel >= 0) {
+        this.rebufferNotice = -1;
+        return _bestLevel;
+      }
+    }
+    // not possible to get rid of rebuffering... try to find level that will guarantee less than maxStarvationDelay of rebuffering
+    let maxStarvationDelay = currentFragDuration ? Math.min(currentFragDuration, config.maxStarvationDelay) : config.maxStarvationDelay;
+    if (!bufferStarvationDelay) {
+      // in case buffer is empty, let's check if previous fragment was loaded to perform a bitrate test
+      const bitrateTestDelay = this.bitrateTestDelay;
+      if (bitrateTestDelay) {
+        // if it is the case, then we need to adjust our max starvation delay using maxLoadingDelay config value
+        // max video loading delay used in  automatic start level selection :
+        // in that mode ABR controller will ensure that video loading time (ie the time to fetch the first fragment at lowest quality level +
+        // the time to fetch the fragment at the appropriate quality level is less than ```maxLoadingDelay``` )
+        // cap maxLoadingDelay and ensure it is not bigger 'than bitrate test' frag duration
+        const maxLoadingDelay = currentFragDuration ? Math.min(currentFragDuration, config.maxLoadingDelay) : config.maxLoadingDelay;
+        maxStarvationDelay = maxLoadingDelay - bitrateTestDelay;
+        this.info(`bitrate test took ${Math.round(1000 * bitrateTestDelay)}ms, set first fragment max fetchDuration to ${Math.round(1000 * maxStarvationDelay)} ms`);
+        // don't use conservative factor on bitrate test
+        bwFactor = bwUpFactor = 1;
+      }
+    }
+    const bestLevel = this.findBestLevel(avgbw, minAutoLevel, maxAutoLevel, bufferStarvationDelay, maxStarvationDelay, bwFactor, bwUpFactor);
+    if (this.rebufferNotice !== bestLevel) {
+      this.rebufferNotice = bestLevel;
+      this.info(`${bufferStarvationDelay ? 'rebuffering expected' : 'buffer is empty'}, optimal quality level ${bestLevel}`);
+    }
+    if (bestLevel > -1) {
+      return bestLevel;
+    }
+    // If no matching level found, see if min auto level would be a better option
+    const minLevel = hls.levels[minAutoLevel];
+    const autoLevel = hls.loadLevelObj;
+    if (autoLevel && (minLevel == null ? void 0 : minLevel.bitrate) < autoLevel.bitrate) {
+      return minAutoLevel;
+    }
+    // or if bitrate is not lower, continue to use loadLevel
+    return hls.loadLevel;
+  }
+  getStarvationDelay() {
+    const hls = this.hls;
+    const media = hls.media;
+    if (!media) {
+      return Infinity;
+    }
+    // playbackRate is the absolute value of the playback rate; if media.playbackRate is 0, we use 1 to load as
+    // if we're playing back at the normal rate.
+    const playbackRate = media && media.playbackRate !== 0 ? Math.abs(media.playbackRate) : 1.0;
+    const bufferInfo = hls.mainForwardBufferInfo;
+    return (bufferInfo ? bufferInfo.len : 0) / playbackRate;
+  }
+  getBwEstimate() {
+    return this.bwEstimator.canEstimate() ? this.bwEstimator.getEstimate() : this.hls.config.abrEwmaDefaultEstimate;
+  }
+  findBestLevel(currentBw, minAutoLevel, maxAutoLevel, bufferStarvationDelay, maxStarvationDelay, bwFactor, bwUpFactor) {
+    var _this$hls$latestLevel;
+    const maxFetchDuration = bufferStarvationDelay + maxStarvationDelay;
+    const lastLoadedFragLevel = this.lastLoadedFragLevel;
+    const selectionBaseLevel = lastLoadedFragLevel === -1 ? this.hls.firstLevel : lastLoadedFragLevel;
+    const {
+      fragCurrent,
+      partCurrent
+    } = this;
+    const {
+      levels,
+      allAudioTracks,
+      loadLevel,
+      config
+    } = this.hls;
+    if (levels.length === 1) {
+      return 0;
+    }
+    const level = levels[selectionBaseLevel];
+    const live = !!((_this$hls$latestLevel = this.hls.latestLevelDetails) != null && _this$hls$latestLevel.live);
+    const firstSelection = loadLevel === -1 || lastLoadedFragLevel === -1;
+    let currentCodecSet;
+    let currentVideoRange = 'SDR';
+    let currentFrameRate = (level == null ? void 0 : level.frameRate) || 0;
+    const {
+      audioPreference,
+      videoPreference
+    } = config;
+    const audioTracksByGroup = this.audioTracksByGroup || (this.audioTracksByGroup = getAudioTracksByGroup(allAudioTracks));
+    let minStartIndex = -1;
+    if (firstSelection) {
+      if (this.firstSelection !== -1) {
+        return this.firstSelection;
+      }
+      const codecTiers = this.codecTiers || (this.codecTiers = getCodecTiers(levels, audioTracksByGroup, minAutoLevel, maxAutoLevel));
+      const startTier = getStartCodecTier(codecTiers, currentVideoRange, currentBw, audioPreference, videoPreference);
+      const {
+        codecSet,
+        videoRanges,
+        minFramerate,
+        minBitrate,
+        minIndex,
+        preferHDR
+      } = startTier;
+      minStartIndex = minIndex;
+      currentCodecSet = codecSet;
+      currentVideoRange = preferHDR ? videoRanges[videoRanges.length - 1] : videoRanges[0];
+      currentFrameRate = minFramerate;
+      currentBw = Math.max(currentBw, minBitrate);
+      this.log(`picked start tier ${stringify(startTier)}`);
+    } else {
+      currentCodecSet = level == null ? void 0 : level.codecSet;
+      currentVideoRange = level == null ? void 0 : level.videoRange;
+    }
+    const currentFragDuration = partCurrent ? partCurrent.duration : fragCurrent ? fragCurrent.duration : 0;
+    const ttfbEstimateSec = this.bwEstimator.getEstimateTTFB() / 1000;
+    const levelsSkipped = [];
+    for (let i = maxAutoLevel; i >= minAutoLevel; i--) {
+      var _levelInfo$supportedR;
+      const levelInfo = levels[i];
+      const upSwitch = i > selectionBaseLevel;
+      if (!levelInfo) {
+        continue;
+      }
+      if (config.useMediaCapabilities && !levelInfo.supportedResult && !levelInfo.supportedPromise) {
+        const mediaCapabilities = navigator.mediaCapabilities;
+        if (typeof (mediaCapabilities == null ? void 0 : mediaCapabilities.decodingInfo) === 'function' && requiresMediaCapabilitiesDecodingInfo(levelInfo, audioTracksByGroup, currentVideoRange, currentFrameRate, currentBw, audioPreference)) {
+          levelInfo.supportedPromise = getMediaDecodingInfoPromise(levelInfo, audioTracksByGroup, mediaCapabilities, this.supportedCache);
+          levelInfo.supportedPromise.then(decodingInfo => {
+            if (!this.hls) {
+              return;
+            }
+            levelInfo.supportedResult = decodingInfo;
+            const levels = this.hls.levels;
+            const index = levels.indexOf(levelInfo);
+            if (decodingInfo.error) {
+              this.warn(`MediaCapabilities decodingInfo error: "${decodingInfo.error}" for level ${index} ${stringify(decodingInfo)}`);
+            } else if (!decodingInfo.supported) {
+              this.warn(`Unsupported MediaCapabilities decodingInfo result for level ${index} ${stringify(decodingInfo)}`);
+              if (index > -1 && levels.length > 1) {
+                this.log(`Removing unsupported level ${index}`);
+                this.hls.removeLevel(index);
+                if (this.hls.loadLevel === -1) {
+                  this.hls.nextLoadLevel = 0;
+                }
+              }
+            } else if (decodingInfo.decodingInfoResults.some(info => info.smooth === false || info.powerEfficient === false)) {
+              this.log(`MediaCapabilities decodingInfo for level ${index} not smooth or powerEfficient: ${stringify(decodingInfo)}`);
+            }
+          }).catch(error => {
+            this.warn(`Error handling MediaCapabilities decodingInfo: ${error}`);
+          });
+        } else {
+          levelInfo.supportedResult = SUPPORTED_INFO_DEFAULT;
+        }
+      }
+
+      // skip candidates which change codec-family or video-range,
+      // and which decrease or increase frame-rate for up and down-switch respectfully
+      if (currentCodecSet && levelInfo.codecSet !== currentCodecSet || currentVideoRange && levelInfo.videoRange !== currentVideoRange || upSwitch && currentFrameRate > levelInfo.frameRate || !upSwitch && currentFrameRate > 0 && currentFrameRate < levelInfo.frameRate || (_levelInfo$supportedR = levelInfo.supportedResult) != null && (_levelInfo$supportedR = _levelInfo$supportedR.decodingInfoResults) != null && _levelInfo$supportedR.some(info => info.smooth === false)) {
+        if (!firstSelection || i !== minStartIndex) {
+          levelsSkipped.push(i);
+          continue;
+        }
+      }
+      const levelDetails = levelInfo.details;
+      const avgDuration = (partCurrent ? levelDetails == null ? void 0 : levelDetails.partTarget : levelDetails == null ? void 0 : levelDetails.averagetargetduration) || currentFragDuration;
+      let adjustedbw;
+      // follow algorithm captured from stagefright :
+      // https://android.googlesource.com/platform/frameworks/av/+/master/media/libstagefright/httplive/LiveSession.cpp
+      // Pick the highest bandwidth stream below or equal to estimated bandwidth.
+      // consider only 80% of the available bandwidth, but if we are switching up,
+      // be even more conservative (70%) to avoid overestimating and immediately
+      // switching back.
+      if (!upSwitch) {
+        adjustedbw = bwFactor * currentBw;
+      } else {
+        adjustedbw = bwUpFactor * currentBw;
+      }
+
+      // Use average bitrate when starvation delay (buffer length) is gt or eq two segment durations and rebuffering is not expected (maxStarvationDelay > 0)
+      const bitrate = currentFragDuration && bufferStarvationDelay >= currentFragDuration * 2 && maxStarvationDelay === 0 ? levelInfo.averageBitrate : levelInfo.maxBitrate;
+      const fetchDuration = this.getTimeToLoadFrag(ttfbEstimateSec, adjustedbw, bitrate * avgDuration, levelDetails === undefined);
+      const canSwitchWithinTolerance =
+      // if adjusted bw is greater than level bitrate AND
+      adjustedbw >= bitrate && (
+      // no level change, or new level has no error history
+      i === lastLoadedFragLevel || levelInfo.loadError === 0 && levelInfo.fragmentError === 0) && (
+      // fragment fetchDuration unknown OR live stream OR fragment fetchDuration less than max allowed fetch duration, then this level matches
+      // we don't account for max Fetch Duration for live streams, this is to avoid switching down when near the edge of live sliding window ...
+      // special case to support startLevel = -1 (bitrateTest) on live streams : in that case we should not exit loop so that findBestLevel will return -1
+      fetchDuration <= ttfbEstimateSec || !isFiniteNumber(fetchDuration) || live && !this.bitrateTestDelay || fetchDuration < maxFetchDuration);
+      if (canSwitchWithinTolerance) {
+        const forcedAutoLevel = this.forcedAutoLevel;
+        if (i !== loadLevel && (forcedAutoLevel === -1 || forcedAutoLevel !== loadLevel)) {
+          if (levelsSkipped.length) {
+            this.trace(`Skipped level(s) ${levelsSkipped.join(',')} of ${maxAutoLevel} max with CODECS and VIDEO-RANGE:"${levels[levelsSkipped[0]].codecs}" ${levels[levelsSkipped[0]].videoRange}; not compatible with "${currentCodecSet}" ${currentVideoRange}`);
+          }
+          this.info(`switch candidate:${selectionBaseLevel}->${i} adjustedbw(${Math.round(adjustedbw)})-bitrate=${Math.round(adjustedbw - bitrate)} ttfb:${ttfbEstimateSec.toFixed(1)} avgDuration:${avgDuration.toFixed(1)} maxFetchDuration:${maxFetchDuration.toFixed(1)} fetchDuration:${fetchDuration.toFixed(1)} firstSelection:${firstSelection} codecSet:${levelInfo.codecSet} videoRange:${levelInfo.videoRange} hls.loadLevel:${loadLevel}`);
+        }
+        if (firstSelection) {
+          this.firstSelection = i;
+        }
+        // as we are looping from highest to lowest, this will return the best achievable quality level
+        return i;
+      }
+    }
+    // not enough time budget even with quality level 0 ... rebuffering might happen
+    return -1;
+  }
+  set nextAutoLevel(nextLevel) {
+    const value = this.deriveNextAutoLevel(nextLevel);
+    if (this._nextAutoLevel !== value) {
+      this.nextAutoLevelKey = '';
+      this._nextAutoLevel = value;
+    }
+  }
+  deriveNextAutoLevel(nextLevel) {
+    const {
+      maxAutoLevel,
+      minAutoLevel
+    } = this.hls;
+    return Math.min(Math.max(nextLevel, minAutoLevel), maxAutoLevel);
+  }
+}
+
+const BinarySearch = {
+  /**
+   * Searches for an item in an array which matches a certain condition.
+   * This requires the condition to only match one item in the array,
+   * and for the array to be ordered.
+   *
+   * @param list The array to search.
+   * @param comparisonFn
+   *      Called and provided a candidate item as the first argument.
+   *      Should return:
+   *          > -1 if the item should be located at a lower index than the provided item.
+   *          > 1 if the item should be located at a higher index than the provided item.
+   *          > 0 if the item is the item you're looking for.
+   *
+   * @returns the object if found, otherwise returns null
+   */
+  search: function (list, comparisonFn) {
+    let minIndex = 0;
+    let maxIndex = list.length - 1;
+    let currentIndex = null;
+    let currentElement = null;
+    while (minIndex <= maxIndex) {
+      currentIndex = (minIndex + maxIndex) / 2 | 0;
+      currentElement = list[currentIndex];
+      const comparisonResult = comparisonFn(currentElement);
+      if (comparisonResult > 0) {
+        minIndex = currentIndex + 1;
+      } else if (comparisonResult < 0) {
+        maxIndex = currentIndex - 1;
+      } else {
+        return currentElement;
+      }
+    }
+    return null;
+  }
+};
+
+/**
+ * Returns first fragment whose endPdt value exceeds the given PDT, or null.
+ * @param fragments - The array of candidate fragments
+ * @param PDTValue - The PDT value which must be exceeded
+ * @param maxFragLookUpTolerance - The amount of time that a fragment's start/end can be within in order to be considered contiguous
+ */
+function findFragmentByPDT(fragments, PDTValue, maxFragLookUpTolerance) {
+  if (PDTValue === null || !Array.isArray(fragments) || !fragments.length || !isFiniteNumber(PDTValue)) {
+    return null;
+  }
+
+  // if less than start
+  const startPDT = fragments[0].programDateTime;
+  if (PDTValue < (startPDT || 0)) {
+    return null;
+  }
+  const endPDT = fragments[fragments.length - 1].endProgramDateTime;
+  if (PDTValue >= (endPDT || 0)) {
+    return null;
+  }
+  for (let seg = 0; seg < fragments.length; ++seg) {
+    const frag = fragments[seg];
+    if (pdtWithinToleranceTest(PDTValue, maxFragLookUpTolerance, frag)) {
+      return frag;
+    }
+  }
+  return null;
+}
+
+/**
+ * Finds a fragment based on the SN of the previous fragment; or based on the needs of the current buffer.
+ * This method compensates for small buffer gaps by applying a tolerance to the start of any candidate fragment, thus
+ * breaking any traps which would cause the same fragment to be continuously selected within a small range.
+ * @param fragPrevious - The last frag successfully appended
+ * @param fragments - The array of candidate fragments
+ * @param bufferEnd - The end of the contiguous buffered range the playhead is currently within
+ * @param maxFragLookUpTolerance - The amount of time that a fragment's start/end can be within in order to be considered contiguous
+ * @returns a matching fragment or null
+ */
+function findFragmentByPTS(fragPrevious, fragments, bufferEnd = 0, maxFragLookUpTolerance = 0, nextFragLookupTolerance = 0.005) {
+  let fragNext = null;
+  if (fragPrevious) {
+    fragNext = fragments[1 + fragPrevious.sn - fragments[0].sn] || null;
+    // check for buffer-end rounding error
+    const bufferEdgeError = fragPrevious.endDTS - bufferEnd;
+    if (bufferEdgeError > 0 && bufferEdgeError < 0.0000015) {
+      bufferEnd += 0.0000015;
+    }
+    if (fragNext && fragPrevious.level !== fragNext.level && fragNext.end <= fragPrevious.end) {
+      fragNext = fragments[2 + fragPrevious.sn - fragments[0].sn] || null;
+    }
+  } else if (bufferEnd === 0 && fragments[0].start === 0) {
+    fragNext = fragments[0];
+  }
+  // Prefer the next fragment if it's within tolerance
+  if (fragNext && ((!fragPrevious || fragPrevious.level === fragNext.level) && fragmentWithinToleranceTest(bufferEnd, maxFragLookUpTolerance, fragNext) === 0 || fragmentWithinFastStartSwitch(fragNext, fragPrevious, Math.min(nextFragLookupTolerance, maxFragLookUpTolerance)))) {
+    return fragNext;
+  }
+  // We might be seeking past the tolerance so find the best match
+  const foundFragment = BinarySearch.search(fragments, fragmentWithinToleranceTest.bind(null, bufferEnd, maxFragLookUpTolerance));
+  if (foundFragment && (foundFragment !== fragPrevious || !fragNext)) {
+    return foundFragment;
+  }
+  // If no match was found return the next fragment after fragPrevious, or null
+  return fragNext;
+}
+function fragmentWithinFastStartSwitch(fragNext, fragPrevious, nextFragLookupTolerance) {
+  if (fragPrevious && fragPrevious.start === 0 && fragPrevious.level < fragNext.level && (fragPrevious.endPTS || 0) > 0) {
+    const firstDuration = fragPrevious.tagList.reduce((duration, tag) => {
+      if (tag[0] === 'INF') {
+        duration += parseFloat(tag[1]);
+      }
+      return duration;
+    }, nextFragLookupTolerance);
+    return fragNext.start <= firstDuration;
+  }
+  return false;
+}
+
+/**
+ * The test function used by the findFragmentBySn's BinarySearch to look for the best match to the current buffer conditions.
+ * @param candidate - The fragment to test
+ * @param bufferEnd - The end of the current buffered range the playhead is currently within
+ * @param maxFragLookUpTolerance - The amount of time that a fragment's start can be within in order to be considered contiguous
+ * @returns 0 if it matches, 1 if too low, -1 if too high
+ */
+function fragmentWithinToleranceTest(bufferEnd = 0, maxFragLookUpTolerance = 0, candidate) {
+  // eagerly accept an accurate match (no tolerance)
+  if (candidate.start <= bufferEnd && candidate.start + candidate.duration > bufferEnd) {
+    return 0;
+  }
+  // offset should be within fragment boundary - config.maxFragLookUpTolerance
+  // this is to cope with situations like
+  // bufferEnd = 9.991
+  // frag[Ø] : [0,10]
+  // frag[1] : [10,20]
+  // bufferEnd is within frag[0] range ... although what we are expecting is to return frag[1] here
+  //              frag start               frag start+duration
+  //                  |-----------------------------|
+  //              <--->                         <--->
+  //  ...--------><-----------------------------><---------....
+  // previous frag         matching fragment         next frag
+  //  return -1             return 0                 return 1
+  // logger.log(`level/sn/start/end/bufEnd:${level}/${candidate.sn}/${candidate.start}/${(candidate.start+candidate.duration)}/${bufferEnd}`);
+  // Set the lookup tolerance to be small enough to detect the current segment - ensures we don't skip over very small segments
+  const candidateLookupTolerance = Math.min(maxFragLookUpTolerance, candidate.duration + (candidate.deltaPTS ? candidate.deltaPTS : 0));
+  if (candidate.start + candidate.duration - candidateLookupTolerance <= bufferEnd) {
+    return 1;
+  } else if (candidate.start - candidateLookupTolerance > bufferEnd && candidate.start) {
+    // if maxFragLookUpTolerance will have negative value then don't return -1 for first element
+    return -1;
+  }
+  return 0;
+}
+
+/**
+ * The test function used by the findFragmentByPdt's BinarySearch to look for the best match to the current buffer conditions.
+ * This function tests the candidate's program date time values, as represented in Unix time
+ * @param candidate - The fragment to test
+ * @param pdtBufferEnd - The Unix time representing the end of the current buffered range
+ * @param maxFragLookUpTolerance - The amount of time that a fragment's start can be within in order to be considered contiguous
+ * @returns true if contiguous, false otherwise
+ */
+function pdtWithinToleranceTest(pdtBufferEnd, maxFragLookUpTolerance, candidate) {
+  const candidateLookupTolerance = Math.min(maxFragLookUpTolerance, candidate.duration + (candidate.deltaPTS ? candidate.deltaPTS : 0)) * 1000;
+
+  // endProgramDateTime can be null, default to zero
+  const endProgramDateTime = candidate.endProgramDateTime || 0;
+  return endProgramDateTime - candidateLookupTolerance > pdtBufferEnd;
+}
+function findNearestWithCC(details, cc, pos) {
+  if (details) {
+    if (details.startCC <= cc && details.endCC >= cc) {
+      let fragments = details.fragments;
+      const {
+        fragmentHint
+      } = details;
+      if (fragmentHint) {
+        fragments = fragments.concat(fragmentHint);
+      }
+      let closest;
+      BinarySearch.search(fragments, candidate => {
+        if (candidate.cc < cc) {
+          return 1;
+        }
+        if (candidate.cc > cc) {
+          return -1;
+        }
+        closest = candidate;
+        if (candidate.end <= pos) {
+          return 1;
+        }
+        if (candidate.start > pos) {
+          return -1;
+        }
+        return 0;
+      });
+      return closest || null;
+    }
+  }
+  return null;
+}
+
+function isTimeoutError(error) {
+  switch (error.details) {
+    case ErrorDetails.FRAG_LOAD_TIMEOUT:
+    case ErrorDetails.KEY_LOAD_TIMEOUT:
+    case ErrorDetails.LEVEL_LOAD_TIMEOUT:
+    case ErrorDetails.MANIFEST_LOAD_TIMEOUT:
+      return true;
+  }
+  return false;
+}
+function isKeyError(error) {
+  return error.details.startsWith('key');
+}
+function isUnusableKeyError(error) {
+  return isKeyError(error) && !!error.frag && !error.frag.decryptdata;
+}
+function getRetryConfig(loadPolicy, error) {
+  const isTimeout = isTimeoutError(error);
+  return loadPolicy.default[`${isTimeout ? 'timeout' : 'error'}Retry`];
+}
+function getRetryDelay(retryConfig, retryCount) {
+  // exponential backoff capped to max retry delay
+  const backoffFactor = retryConfig.backoff === 'linear' ? 1 : Math.pow(2, retryCount);
+  return Math.min(backoffFactor * retryConfig.retryDelayMs, retryConfig.maxRetryDelayMs);
+}
+function getLoaderConfigWithoutReties(loderConfig) {
+  return _objectSpread2(_objectSpread2({}, loderConfig), {
+    errorRetry: null,
+    timeoutRetry: null
+  });
+}
+function shouldRetry(retryConfig, retryCount, isTimeout, loaderResponse) {
+  if (!retryConfig) {
+    return false;
+  }
+  const httpStatus = loaderResponse == null ? void 0 : loaderResponse.code;
+  const retry = retryCount < retryConfig.maxNumRetry && (retryForHttpStatus(httpStatus) || !!isTimeout);
+  return retryConfig.shouldRetry ? retryConfig.shouldRetry(retryConfig, retryCount, isTimeout, loaderResponse, retry) : retry;
+}
+function retryForHttpStatus(httpStatus) {
+  // Do not retry on status 4xx, status 0 (CORS error), or undefined (decrypt/gap/parse error)
+  return offlineHttpStatus(httpStatus) || !!httpStatus && (httpStatus < 400 || httpStatus > 499);
+}
+function offlineHttpStatus(httpStatus) {
+  return httpStatus === 0 && navigator.onLine === false;
+}
+
+var NetworkErrorAction = {
+  DoNothing: 0,
+  SendEndCallback: 1,
+  SendAlternateToPenaltyBox: 2,
+  RemoveAlternatePermanently: 3,
+  InsertDiscontinuity: 4,
+  RetryRequest: 5
+};
+var ErrorActionFlags = {
+  None: 0,
+  MoveAllAlternatesMatchingHost: 1,
+  MoveAllAlternatesMatchingHDCP: 2,
+  MoveAllAlternatesMatchingKey: 4,
+  SwitchToSDR: 8
+};
+class ErrorController extends Logger {
+  constructor(hls) {
+    super('error-controller', hls.logger);
+    this.hls = void 0;
+    this.playlistError = 0;
+    this.hls = hls;
+    this.registerListeners();
+  }
+  registerListeners() {
+    const hls = this.hls;
+    hls.on(Events.ERROR, this.onError, this);
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+  }
+  unregisterListeners() {
+    const hls = this.hls;
+    if (!hls) {
+      return;
+    }
+    hls.off(Events.ERROR, this.onError, this);
+    hls.off(Events.ERROR, this.onErrorOut, this);
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+  }
+  destroy() {
+    this.unregisterListeners();
+    // @ts-ignore
+    this.hls = null;
+  }
+  startLoad(startPosition) {}
+  stopLoad() {
+    this.playlistError = 0;
+  }
+  getVariantLevelIndex(frag) {
+    if ((frag == null ? void 0 : frag.type) === PlaylistLevelType.MAIN) {
+      return frag.level;
+    }
+    return this.getVariantIndex();
+  }
+  getVariantIndex() {
+    var _hls$loadLevelObj;
+    const hls = this.hls;
+    const currentLevel = hls.currentLevel;
+    if ((_hls$loadLevelObj = hls.loadLevelObj) != null && _hls$loadLevelObj.details || currentLevel === -1) {
+      return hls.loadLevel;
+    }
+    return currentLevel;
+  }
+  variantHasKey(level, keyInError) {
+    if (level) {
+      var _level$details;
+      if ((_level$details = level.details) != null && _level$details.hasKey(keyInError)) {
+        return true;
+      }
+      const audioGroupsIds = level.audioGroups;
+      if (audioGroupsIds) {
+        const audioTracks = this.hls.allAudioTracks.filter(track => audioGroupsIds.indexOf(track.groupId) >= 0);
+        return audioTracks.some(track => {
+          var _track$details;
+          return (_track$details = track.details) == null ? void 0 : _track$details.hasKey(keyInError);
+        });
+      }
+    }
+    return false;
+  }
+  onManifestLoading() {
+    this.playlistError = 0;
+  }
+  onLevelUpdated() {
+    this.playlistError = 0;
+  }
+  onError(event, data) {
+    var _data$frag;
+    if (data.fatal) {
+      return;
+    }
+    const hls = this.hls;
+    const context = data.context;
+    switch (data.details) {
+      case ErrorDetails.FRAG_LOAD_ERROR:
+      case ErrorDetails.FRAG_LOAD_TIMEOUT:
+      case ErrorDetails.KEY_LOAD_ERROR:
+      case ErrorDetails.KEY_LOAD_TIMEOUT:
+        data.errorAction = this.getFragRetryOrSwitchAction(data);
+        return;
+      case ErrorDetails.FRAG_PARSING_ERROR:
+        // ignore empty segment errors marked as gap
+        if ((_data$frag = data.frag) != null && _data$frag.gap) {
+          data.errorAction = createDoNothingErrorAction();
+          return;
+        }
+      // falls through
+      case ErrorDetails.FRAG_GAP:
+      case ErrorDetails.FRAG_DECRYPT_ERROR:
+        {
+          // Switch level if possible, otherwise allow retry count to reach max error retries
+          data.errorAction = this.getFragRetryOrSwitchAction(data);
+          data.errorAction.action = NetworkErrorAction.SendAlternateToPenaltyBox;
+          return;
+        }
+      case ErrorDetails.LEVEL_EMPTY_ERROR:
+      case ErrorDetails.LEVEL_PARSING_ERROR:
+        {
+          var _data$context;
+          // Only retry when empty and live
+          const levelIndex = data.parent === PlaylistLevelType.MAIN ? data.level : hls.loadLevel;
+          if (data.details === ErrorDetails.LEVEL_EMPTY_ERROR && !!((_data$context = data.context) != null && (_data$context = _data$context.levelDetails) != null && _data$context.live)) {
+            data.errorAction = this.getPlaylistRetryOrSwitchAction(data, levelIndex);
+          } else {
+            // Escalate to fatal if not retrying or switching
+            data.levelRetry = false;
+            data.errorAction = this.getLevelSwitchAction(data, levelIndex);
+          }
+        }
+        return;
+      case ErrorDetails.LEVEL_LOAD_ERROR:
+      case ErrorDetails.LEVEL_LOAD_TIMEOUT:
+        if (typeof (context == null ? void 0 : context.level) === 'number') {
+          data.errorAction = this.getPlaylistRetryOrSwitchAction(data, context.level);
+        }
+        return;
+      case ErrorDetails.AUDIO_TRACK_LOAD_ERROR:
+      case ErrorDetails.AUDIO_TRACK_LOAD_TIMEOUT:
+      case ErrorDetails.SUBTITLE_LOAD_ERROR:
+      case ErrorDetails.SUBTITLE_TRACK_LOAD_TIMEOUT:
+        if (context) {
+          const level = hls.loadLevelObj;
+          if (level && (context.type === PlaylistContextType.AUDIO_TRACK && level.hasAudioGroup(context.groupId) || context.type === PlaylistContextType.SUBTITLE_TRACK && level.hasSubtitleGroup(context.groupId))) {
+            // Perform Pathway switch or Redundant failover if possible for fastest recovery
+            // otherwise allow playlist retry count to reach max error retries
+            data.errorAction = this.getPlaylistRetryOrSwitchAction(data, hls.loadLevel);
+            data.errorAction.action = NetworkErrorAction.SendAlternateToPenaltyBox;
+            data.errorAction.flags = ErrorActionFlags.MoveAllAlternatesMatchingHost;
+            return;
+          }
+        }
+        return;
+      case ErrorDetails.KEY_SYSTEM_STATUS_OUTPUT_RESTRICTED:
+        {
+          data.errorAction = {
+            action: NetworkErrorAction.SendAlternateToPenaltyBox,
+            flags: ErrorActionFlags.MoveAllAlternatesMatchingHDCP
+          };
+        }
+        return;
+      case ErrorDetails.KEY_SYSTEM_SESSION_UPDATE_FAILED:
+      case ErrorDetails.KEY_SYSTEM_STATUS_INTERNAL_ERROR:
+      case ErrorDetails.KEY_SYSTEM_NO_SESSION:
+        {
+          data.errorAction = {
+            action: NetworkErrorAction.SendAlternateToPenaltyBox,
+            flags: ErrorActionFlags.MoveAllAlternatesMatchingKey
+          };
+        }
+        return;
+      case ErrorDetails.BUFFER_ADD_CODEC_ERROR:
+      case ErrorDetails.REMUX_ALLOC_ERROR:
+      case ErrorDetails.BUFFER_APPEND_ERROR:
+        // Buffer-controller can set errorAction when append errors can be ignored or resolved locally
+        if (!data.errorAction) {
+          var _data$level;
+          data.errorAction = this.getLevelSwitchAction(data, (_data$level = data.level) != null ? _data$level : hls.loadLevel);
+        }
+        return;
+      case ErrorDetails.INTERNAL_EXCEPTION:
+      case ErrorDetails.BUFFER_APPENDING_ERROR:
+      case ErrorDetails.BUFFER_FULL_ERROR:
+      case ErrorDetails.LEVEL_SWITCH_ERROR:
+      case ErrorDetails.BUFFER_STALLED_ERROR:
+      case ErrorDetails.BUFFER_SEEK_OVER_HOLE:
+      case ErrorDetails.BUFFER_NUDGE_ON_STALL:
+        data.errorAction = createDoNothingErrorAction();
+        return;
+    }
+    if (data.type === ErrorTypes.KEY_SYSTEM_ERROR) {
+      // Do not retry level. Should be fatal if ErrorDetails.KEY_SYSTEM_<ERROR> not handled with early return above.
+      data.levelRetry = false;
+      data.errorAction = createDoNothingErrorAction();
+    }
+  }
+  getPlaylistRetryOrSwitchAction(data, levelIndex) {
+    const hls = this.hls;
+    const retryConfig = getRetryConfig(hls.config.playlistLoadPolicy, data);
+    const retryCount = this.playlistError++;
+    const retry = shouldRetry(retryConfig, retryCount, isTimeoutError(data), data.response);
+    if (retry) {
+      return {
+        action: NetworkErrorAction.RetryRequest,
+        flags: ErrorActionFlags.None,
+        retryConfig,
+        retryCount
+      };
+    }
+    const errorAction = this.getLevelSwitchAction(data, levelIndex);
+    if (retryConfig) {
+      errorAction.retryConfig = retryConfig;
+      errorAction.retryCount = retryCount;
+    }
+    return errorAction;
+  }
+  getFragRetryOrSwitchAction(data) {
+    const hls = this.hls;
+    // Share fragment error count accross media options (main, audio, subs)
+    // This allows for level based rendition switching when media option assets fail
+    const variantLevelIndex = this.getVariantLevelIndex(data.frag);
+    const level = hls.levels[variantLevelIndex];
+    const {
+      fragLoadPolicy,
+      keyLoadPolicy
+    } = hls.config;
+    const retryConfig = getRetryConfig(isKeyError(data) ? keyLoadPolicy : fragLoadPolicy, data);
+    const fragmentErrors = hls.levels.reduce((acc, level) => acc + level.fragmentError, 0);
+    // Switch levels when out of retried or level index out of bounds
+    if (level) {
+      if (data.details !== ErrorDetails.FRAG_GAP) {
+        level.fragmentError++;
+      }
+      if (!isUnusableKeyError(data)) {
+        const retry = shouldRetry(retryConfig, fragmentErrors, isTimeoutError(data), data.response);
+        if (retry) {
+          return {
+            action: NetworkErrorAction.RetryRequest,
+            flags: ErrorActionFlags.None,
+            retryConfig,
+            retryCount: fragmentErrors
+          };
+        }
+      }
+    }
+    // Reach max retry count, or Missing level reference
+    // Switch to valid index
+    const errorAction = this.getLevelSwitchAction(data, variantLevelIndex);
+    // Add retry details to allow skipping of FRAG_PARSING_ERROR
+    if (retryConfig) {
+      errorAction.retryConfig = retryConfig;
+      errorAction.retryCount = fragmentErrors;
+    }
+    return errorAction;
+  }
+  getLevelSwitchAction(data, levelIndex) {
+    const hls = this.hls;
+    if (levelIndex === null || levelIndex === undefined) {
+      levelIndex = hls.loadLevel;
+    }
+    const level = this.hls.levels[levelIndex];
+    if (level) {
+      var _data$frag2, _data$context2;
+      const errorDetails = data.details;
+      level.loadError++;
+      if (errorDetails === ErrorDetails.BUFFER_APPEND_ERROR) {
+        level.fragmentError++;
+      }
+      // Search for next level to retry
+      let nextLevel = -1;
+      const {
+        levels,
+        loadLevel,
+        minAutoLevel,
+        maxAutoLevel
+      } = hls;
+      if (!hls.autoLevelEnabled && !hls.config.preserveManualLevelOnError) {
+        hls.loadLevel = -1;
+      }
+      const fragErrorType = (_data$frag2 = data.frag) == null ? void 0 : _data$frag2.type;
+      // Find alternate audio codec if available on audio codec error
+      const isAudioCodecError = fragErrorType === PlaylistLevelType.AUDIO && errorDetails === ErrorDetails.FRAG_PARSING_ERROR || data.sourceBufferName === 'audio' && (errorDetails === ErrorDetails.BUFFER_ADD_CODEC_ERROR || errorDetails === ErrorDetails.BUFFER_APPEND_ERROR);
+      const findAudioCodecAlternate = isAudioCodecError && levels.some(({
+        audioCodec
+      }) => level.audioCodec !== audioCodec);
+      // Find alternate video codec if available on video codec error
+      const isVideoCodecError = data.sourceBufferName === 'video' && (errorDetails === ErrorDetails.BUFFER_ADD_CODEC_ERROR || errorDetails === ErrorDetails.BUFFER_APPEND_ERROR);
+      const findVideoCodecAlternate = isVideoCodecError && levels.some(({
+        codecSet,
+        audioCodec
+      }) => level.codecSet !== codecSet && level.audioCodec === audioCodec);
+      const {
+        type: playlistErrorType,
+        groupId: playlistErrorGroupId
+      } = (_data$context2 = data.context) != null ? _data$context2 : {};
+      for (let i = levels.length; i--;) {
+        const candidate = (i + loadLevel) % levels.length;
+        if (candidate !== loadLevel && candidate >= minAutoLevel && candidate <= maxAutoLevel && levels[candidate].loadError === 0) {
+          var _level$audioGroups, _level$subtitleGroups;
+          const levelCandidate = levels[candidate];
+          // Skip level switch if GAP tag is found in next level at same position
+          if (errorDetails === ErrorDetails.FRAG_GAP && fragErrorType === PlaylistLevelType.MAIN && data.frag) {
+            const levelDetails = levels[candidate].details;
+            if (levelDetails) {
+              const fragCandidate = findFragmentByPTS(data.frag, levelDetails.fragments, data.frag.start);
+              if (fragCandidate != null && fragCandidate.gap) {
+                continue;
+              }
+            }
+          } else if (playlistErrorType === PlaylistContextType.AUDIO_TRACK && levelCandidate.hasAudioGroup(playlistErrorGroupId) || playlistErrorType === PlaylistContextType.SUBTITLE_TRACK && levelCandidate.hasSubtitleGroup(playlistErrorGroupId)) {
+            // For audio/subs playlist errors find another group ID or fallthrough to redundant fail-over
+            continue;
+          } else if (fragErrorType === PlaylistLevelType.AUDIO && (_level$audioGroups = level.audioGroups) != null && _level$audioGroups.some(groupId => levelCandidate.hasAudioGroup(groupId)) || fragErrorType === PlaylistLevelType.SUBTITLE && (_level$subtitleGroups = level.subtitleGroups) != null && _level$subtitleGroups.some(groupId => levelCandidate.hasSubtitleGroup(groupId)) || findAudioCodecAlternate && level.audioCodec === levelCandidate.audioCodec || findVideoCodecAlternate && level.codecSet === levelCandidate.codecSet || !findAudioCodecAlternate && level.codecSet !== levelCandidate.codecSet) {
+            // For video/audio/subs frag errors find another group ID or fallthrough to redundant fail-over
+            continue;
+          }
+          nextLevel = candidate;
+          break;
+        }
+      }
+      if (nextLevel > -1 && hls.loadLevel !== nextLevel) {
+        data.levelRetry = true;
+        this.playlistError = 0;
+        return {
+          action: NetworkErrorAction.SendAlternateToPenaltyBox,
+          flags: ErrorActionFlags.None,
+          nextAutoLevel: nextLevel
+        };
+      }
+    }
+    // No levels to switch / Manual level selection / Level not found
+    // Resolve with Pathway switch, Redundant fail-over, or stay on lowest Level
+    return {
+      action: NetworkErrorAction.SendAlternateToPenaltyBox,
+      flags: ErrorActionFlags.MoveAllAlternatesMatchingHost
+    };
+  }
+  onErrorOut(event, data) {
+    var _data$errorAction;
+    switch ((_data$errorAction = data.errorAction) == null ? void 0 : _data$errorAction.action) {
+      case NetworkErrorAction.DoNothing:
+        break;
+      case NetworkErrorAction.SendAlternateToPenaltyBox:
+        this.sendAlternateToPenaltyBox(data);
+        if (!data.errorAction.resolved && data.details !== ErrorDetails.FRAG_GAP) {
+          data.fatal = true;
+        } else if (/MediaSource readyState: ended/.test(data.error.message)) {
+          this.warn(`MediaSource ended after "${data.sourceBufferName}" sourceBuffer append error. Attempting to recover from media error.`);
+          this.hls.recoverMediaError();
+        }
+        break;
+      case NetworkErrorAction.RetryRequest:
+        // handled by stream and playlist/level controllers
+        break;
+    }
+    if (data.fatal) {
+      this.hls.stopLoad();
+      return;
+    }
+  }
+  sendAlternateToPenaltyBox(data) {
+    const hls = this.hls;
+    const errorAction = data.errorAction;
+    if (!errorAction) {
+      return;
+    }
+    const {
+      flags
+    } = errorAction;
+    const nextAutoLevel = errorAction.nextAutoLevel;
+    switch (flags) {
+      case ErrorActionFlags.None:
+        this.switchLevel(data, nextAutoLevel);
+        break;
+      case ErrorActionFlags.MoveAllAlternatesMatchingHDCP:
+        {
+          const levelIndex = this.getVariantLevelIndex(data.frag);
+          const level = hls.levels[levelIndex];
+          const restrictedHdcpLevel = level == null ? void 0 : level.attrs['HDCP-LEVEL'];
+          errorAction.hdcpLevel = restrictedHdcpLevel;
+          if (restrictedHdcpLevel === 'NONE') {
+            this.warn(`HDCP policy resticted output with HDCP-LEVEL=NONE`);
+          } else if (restrictedHdcpLevel) {
+            hls.maxHdcpLevel = HdcpLevels[HdcpLevels.indexOf(restrictedHdcpLevel) - 1];
+            errorAction.resolved = true;
+            this.warn(`Restricting playback to HDCP-LEVEL of "${hls.maxHdcpLevel}" or lower`);
+            break;
+          }
+          // Fallthrough when no HDCP-LEVEL attribute is found
+        }
+      // eslint-disable-next-line no-fallthrough
+      case ErrorActionFlags.MoveAllAlternatesMatchingKey:
+        {
+          const levelKey = data.decryptdata;
+          if (levelKey) {
+            // Penalize all levels with key
+            const levels = this.hls.levels;
+            const levelCountWithError = levels.length;
+            for (let i = levelCountWithError; i--;) {
+              if (this.variantHasKey(levels[i], levelKey)) {
+                var _levels$i$audioGroups, _data$frag3;
+                this.log(`Banned key found in level ${i} (${levels[i].bitrate}bps) or audio group "${(_levels$i$audioGroups = levels[i].audioGroups) == null ? void 0 : _levels$i$audioGroups.join(',')}" (${(_data$frag3 = data.frag) == null ? void 0 : _data$frag3.type} fragment) ${arrayToHex(levelKey.keyId || [])}`);
+                levels[i].fragmentError++;
+                levels[i].loadError++;
+                this.log(`Removing level ${i} with key error (${data.error})`);
+                this.hls.removeLevel(i);
+              }
+            }
+            const frag = data.frag;
+            if (this.hls.levels.length < levelCountWithError) {
+              errorAction.resolved = true;
+            } else if (frag && frag.type !== PlaylistLevelType.MAIN) {
+              // Ignore key error for audio track with unmatched key (main session error)
+              const fragLevelKey = frag.decryptdata;
+              if (fragLevelKey && !levelKey.matches(fragLevelKey)) {
+                errorAction.resolved = true;
+              }
+            }
+          }
+          break;
+        }
+    }
+    // If not resolved by previous actions try to switch to next level
+    if (!errorAction.resolved) {
+      this.switchLevel(data, nextAutoLevel);
+    }
+  }
+  switchLevel(data, levelIndex) {
+    if (levelIndex !== undefined && data.errorAction) {
+      this.warn(`switching to level ${levelIndex} after ${data.details}`);
+      this.hls.nextAutoLevel = levelIndex;
+      data.errorAction.resolved = true;
+      // Stream controller is responsible for this but won't switch on false start
+      this.hls.nextLoadLevel = this.hls.nextAutoLevel;
+      if (data.details === ErrorDetails.BUFFER_ADD_CODEC_ERROR && data.mimeType && data.sourceBufferName !== 'audiovideo') {
+        const codec = getCodecsForMimeType(data.mimeType);
+        const levels = this.hls.levels;
+        for (let i = levels.length; i--;) {
+          if (levels[i][`${data.sourceBufferName}Codec`] === codec) {
+            this.log(`Removing level ${i} for ${data.details} ("${codec}" not supported)`);
+            this.hls.removeLevel(i);
+          }
+        }
+      }
+    }
+  }
+}
+function createDoNothingErrorAction(resolved) {
+  const errorAction = {
+    action: NetworkErrorAction.DoNothing,
+    flags: ErrorActionFlags.None
+  };
+  if (resolved) {
+    errorAction.resolved = true;
+  }
+  return errorAction;
+}
+
+var FragmentState = {
+  NOT_LOADED: "NOT_LOADED",
+  APPENDING: "APPENDING",
+  PARTIAL: "PARTIAL",
+  OK: "OK"
+};
+class FragmentTracker {
+  constructor(hls) {
+    this.activePartLists = Object.create(null);
+    this.endListFragments = Object.create(null);
+    this.fragments = Object.create(null);
+    this.timeRanges = Object.create(null);
+    this.bufferPadding = 0.2;
+    this.hls = void 0;
+    this.hasGaps = false;
+    this.hls = hls;
+    this._registerListeners();
+  }
+  _registerListeners() {
+    const {
+      hls
+    } = this;
+    if (hls) {
+      hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+      hls.on(Events.BUFFER_APPENDED, this.onBufferAppended, this);
+      hls.on(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+      hls.on(Events.FRAG_LOADED, this.onFragLoaded, this);
+    }
+  }
+  _unregisterListeners() {
+    const {
+      hls
+    } = this;
+    if (hls) {
+      hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+      hls.off(Events.BUFFER_APPENDED, this.onBufferAppended, this);
+      hls.off(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+      hls.off(Events.FRAG_LOADED, this.onFragLoaded, this);
+    }
+  }
+  destroy() {
+    this._unregisterListeners();
+    // @ts-ignore
+    this.hls =
+    // @ts-ignore
+    this.fragments =
+    // @ts-ignore
+    this.activePartLists =
+    // @ts-ignore
+    this.endListFragments = this.timeRanges = null;
+  }
+
+  /**
+   * Return a Fragment or Part with an appended range that matches the position and levelType
+   * Otherwise, return null
+   */
+  getAppendedFrag(position, levelType) {
+    const activeParts = this.activePartLists[levelType];
+    if (activeParts) {
+      for (let i = activeParts.length; i--;) {
+        const activePart = activeParts[i];
+        if (!activePart) {
+          break;
+        }
+        if (activePart.start <= position && position <= activePart.end && activePart.loaded) {
+          return activePart;
+        }
+      }
+    }
+    return this.getBufferedFrag(position, levelType);
+  }
+
+  /**
+   * Return a buffered Fragment that matches the position and levelType.
+   * A buffered Fragment is one whose loading, parsing and appending is done (completed or "partial" meaning aborted).
+   * If not found any Fragment, return null
+   */
+  getBufferedFrag(position, levelType) {
+    return this.getFragAtPos(position, levelType, true);
+  }
+  getFragAtPos(position, levelType, buffered) {
+    const {
+      fragments
+    } = this;
+    const keys = Object.keys(fragments);
+    for (let i = keys.length; i--;) {
+      const fragmentEntity = fragments[keys[i]];
+      if ((fragmentEntity == null ? void 0 : fragmentEntity.body.type) === levelType && (!buffered || fragmentEntity.buffered)) {
+        const frag = fragmentEntity.body;
+        if (frag.start <= position && position <= frag.end) {
+          return frag;
+        }
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Partial fragments effected by coded frame eviction will be removed
+   * The browser will unload parts of the buffer to free up memory for new buffer data
+   * Fragments will need to be reloaded when the buffer is freed up, removing partial fragments will allow them to reload(since there might be parts that are still playable)
+   */
+  detectEvictedFragments(elementaryStream, timeRange, playlistType, appendedPart, removeAppending) {
+    if (this.timeRanges) {
+      this.timeRanges[elementaryStream] = timeRange;
+    }
+    // Check if any flagged fragments have been unloaded
+    // excluding anything newer than appendedPartSn
+    const appendedPartSn = (appendedPart == null ? void 0 : appendedPart.fragment.sn) || -1;
+    Object.keys(this.fragments).forEach(key => {
+      const fragmentEntity = this.fragments[key];
+      if (!fragmentEntity) {
+        return;
+      }
+      if (appendedPartSn >= fragmentEntity.body.sn) {
+        return;
+      }
+      if (!fragmentEntity.buffered && (!fragmentEntity.loaded || removeAppending)) {
+        if (fragmentEntity.body.type === playlistType) {
+          this.removeFragment(fragmentEntity.body);
+        }
+        return;
+      }
+      const esData = fragmentEntity.range[elementaryStream];
+      if (!esData) {
+        return;
+      }
+      if (esData.time.length === 0) {
+        this.removeFragment(fragmentEntity.body);
+        return;
+      }
+      esData.time.some(time => {
+        const isNotBuffered = !this.isTimeBuffered(time.startPTS, time.endPTS, timeRange);
+        if (isNotBuffered) {
+          // Unregister partial fragment as it needs to load again to be reused
+          this.removeFragment(fragmentEntity.body);
+        }
+        return isNotBuffered;
+      });
+    });
+  }
+
+  /**
+   * Checks if the fragment passed in is loaded in the buffer properly
+   * Partially loaded fragments will be registered as a partial fragment
+   */
+  detectPartialFragments(data) {
+    const timeRanges = this.timeRanges;
+    if (!timeRanges || data.frag.sn === 'initSegment') {
+      return;
+    }
+    const frag = data.frag;
+    const fragKey = getFragmentKey(frag);
+    const fragmentEntity = this.fragments[fragKey];
+    if (!fragmentEntity || fragmentEntity.buffered && frag.gap) {
+      return;
+    }
+    const isFragHint = !frag.relurl;
+    Object.keys(timeRanges).forEach(elementaryStream => {
+      const streamInfo = frag.elementaryStreams[elementaryStream];
+      if (!streamInfo) {
+        return;
+      }
+      const timeRange = timeRanges[elementaryStream];
+      const partial = isFragHint || streamInfo.partial === true;
+      fragmentEntity.range[elementaryStream] = this.getBufferedTimes(frag, data.part, partial, timeRange);
+    });
+    fragmentEntity.loaded = null;
+    if (Object.keys(fragmentEntity.range).length) {
+      this.bufferedEnd(fragmentEntity, frag);
+      if (!isPartial(fragmentEntity)) {
+        // Remove older fragment parts from lookup after frag is tracked as buffered
+        this.removeParts(frag.sn - 1, frag.type);
+      }
+    } else {
+      // remove fragment if nothing was appended
+      this.removeFragment(fragmentEntity.body);
+    }
+  }
+  bufferedEnd(fragmentEntity, frag) {
+    fragmentEntity.buffered = true;
+    const endList = fragmentEntity.body.endList = frag.endList || fragmentEntity.body.endList;
+    if (endList) {
+      this.endListFragments[fragmentEntity.body.type] = fragmentEntity;
+    }
+  }
+  removeParts(snToKeep, levelType) {
+    const activeParts = this.activePartLists[levelType];
+    if (!activeParts) {
+      return;
+    }
+    this.activePartLists[levelType] = filterParts(activeParts, part => part.fragment.sn >= snToKeep);
+  }
+  fragBuffered(frag, force) {
+    const fragKey = getFragmentKey(frag);
+    let fragmentEntity = this.fragments[fragKey];
+    if (!fragmentEntity && force) {
+      fragmentEntity = this.fragments[fragKey] = {
+        body: frag,
+        appendedPTS: null,
+        loaded: null,
+        buffered: false,
+        range: Object.create(null)
+      };
+      if (frag.gap) {
+        this.hasGaps = true;
+      }
+    }
+    if (fragmentEntity) {
+      fragmentEntity.loaded = null;
+      this.bufferedEnd(fragmentEntity, frag);
+    }
+  }
+  getBufferedTimes(fragment, part, partial, timeRange) {
+    const buffered = {
+      time: [],
+      partial
+    };
+    const startPTS = fragment.start;
+    const endPTS = fragment.end;
+    const minEndPTS = fragment.minEndPTS || endPTS;
+    const maxStartPTS = fragment.maxStartPTS || startPTS;
+    for (let i = 0; i < timeRange.length; i++) {
+      const startTime = timeRange.start(i) - this.bufferPadding;
+      const endTime = timeRange.end(i) + this.bufferPadding;
+      if (maxStartPTS >= startTime && minEndPTS <= endTime) {
+        // Fragment is entirely contained in buffer
+        // No need to check the other timeRange times since it's completely playable
+        buffered.time.push({
+          startPTS: Math.max(startPTS, timeRange.start(i)),
+          endPTS: Math.min(endPTS, timeRange.end(i))
+        });
+        break;
+      } else if (startPTS < endTime && endPTS > startTime) {
+        const start = Math.max(startPTS, timeRange.start(i));
+        const end = Math.min(endPTS, timeRange.end(i));
+        if (end > start) {
+          buffered.partial = true;
+          // Check for intersection with buffer
+          // Get playable sections of the fragment
+          buffered.time.push({
+            startPTS: start,
+            endPTS: end
+          });
+        }
+      } else if (endPTS <= startTime) {
+        // No need to check the rest of the timeRange as it is in order
+        break;
+      }
+    }
+    return buffered;
+  }
+
+  /**
+   * Gets the partial fragment for a certain time
+   */
+  getPartialFragment(time) {
+    let bestFragment = null;
+    let timePadding;
+    let startTime;
+    let endTime;
+    let bestOverlap = 0;
+    const {
+      bufferPadding,
+      fragments
+    } = this;
+    Object.keys(fragments).forEach(key => {
+      const fragmentEntity = fragments[key];
+      if (!fragmentEntity) {
+        return;
+      }
+      if (isPartial(fragmentEntity)) {
+        startTime = fragmentEntity.body.start - bufferPadding;
+        endTime = fragmentEntity.body.end + bufferPadding;
+        if (time >= startTime && time <= endTime) {
+          // Use the fragment that has the most padding from start and end time
+          timePadding = Math.min(time - startTime, endTime - time);
+          if (bestOverlap <= timePadding) {
+            bestFragment = fragmentEntity.body;
+            bestOverlap = timePadding;
+          }
+        }
+      }
+    });
+    return bestFragment;
+  }
+  isEndListAppended(type) {
+    const lastFragmentEntity = this.endListFragments[type];
+    return lastFragmentEntity !== undefined && (lastFragmentEntity.buffered || isPartial(lastFragmentEntity));
+  }
+  getState(fragment) {
+    const fragKey = getFragmentKey(fragment);
+    const fragmentEntity = this.fragments[fragKey];
+    if (fragmentEntity) {
+      if (!fragmentEntity.buffered) {
+        return FragmentState.APPENDING;
+      } else if (isPartial(fragmentEntity)) {
+        return FragmentState.PARTIAL;
+      } else {
+        return FragmentState.OK;
+      }
+    }
+    return FragmentState.NOT_LOADED;
+  }
+  isTimeBuffered(startPTS, endPTS, timeRange) {
+    let startTime;
+    let endTime;
+    for (let i = 0; i < timeRange.length; i++) {
+      startTime = timeRange.start(i) - this.bufferPadding;
+      endTime = timeRange.end(i) + this.bufferPadding;
+      if (startPTS >= startTime && endPTS <= endTime) {
+        return true;
+      }
+      if (endPTS <= startTime) {
+        // No need to check the rest of the timeRange as it is in order
+        return false;
+      }
+    }
+    return false;
+  }
+  onManifestLoading() {
+    this.removeAllFragments();
+  }
+  onFragLoaded(event, data) {
+    // don't track initsegment (for which sn is not a number)
+    // don't track frags used for bitrateTest, they're irrelevant.
+    if (data.frag.sn === 'initSegment' || data.frag.bitrateTest) {
+      return;
+    }
+    const frag = data.frag;
+    // Fragment entity `loaded` FragLoadedData is null when loading parts
+    const loaded = data.part ? null : data;
+    const fragKey = getFragmentKey(frag);
+    this.fragments[fragKey] = {
+      body: frag,
+      appendedPTS: null,
+      loaded,
+      buffered: false,
+      range: Object.create(null)
+    };
+  }
+  onBufferAppended(event, data) {
+    const {
+      frag,
+      part,
+      timeRanges,
+      type
+    } = data;
+    if (frag.sn === 'initSegment') {
+      return;
+    }
+    const playlistType = frag.type;
+    if (part) {
+      let activeParts = this.activePartLists[playlistType];
+      if (!activeParts) {
+        this.activePartLists[playlistType] = activeParts = [];
+      }
+      activeParts.push(part);
+    }
+    // Store the latest timeRanges loaded in the buffer
+    this.timeRanges = timeRanges;
+    const timeRange = timeRanges[type];
+    this.detectEvictedFragments(type, timeRange, playlistType, part);
+  }
+  onFragBuffered(event, data) {
+    this.detectPartialFragments(data);
+  }
+  hasFragment(fragment) {
+    const fragKey = getFragmentKey(fragment);
+    return !!this.fragments[fragKey];
+  }
+  hasFragments(type) {
+    const {
+      fragments
+    } = this;
+    const keys = Object.keys(fragments);
+    if (!type) {
+      return keys.length > 0;
+    }
+    for (let i = keys.length; i--;) {
+      const fragmentEntity = fragments[keys[i]];
+      if ((fragmentEntity == null ? void 0 : fragmentEntity.body.type) === type) {
+        return true;
+      }
+    }
+    return false;
+  }
+  hasParts(type) {
+    var _this$activePartLists;
+    return !!((_this$activePartLists = this.activePartLists[type]) != null && _this$activePartLists.length);
+  }
+  removeFragmentsInRange(start, end, playlistType, withGapOnly, unbufferedOnly) {
+    if (withGapOnly && !this.hasGaps) {
+      return;
+    }
+    Object.keys(this.fragments).forEach(key => {
+      const fragmentEntity = this.fragments[key];
+      if (!fragmentEntity) {
+        return;
+      }
+      const frag = fragmentEntity.body;
+      if (frag.type !== playlistType || withGapOnly && !frag.gap) {
+        return;
+      }
+      if (frag.start < end && frag.end > start && (fragmentEntity.buffered || unbufferedOnly)) {
+        this.removeFragment(frag);
+      }
+    });
+  }
+  removeFragment(fragment) {
+    const fragKey = getFragmentKey(fragment);
+    fragment.clearElementaryStreamInfo();
+    const activeParts = this.activePartLists[fragment.type];
+    if (activeParts) {
+      const snToRemove = fragment.sn;
+      this.activePartLists[fragment.type] = filterParts(activeParts, part => part.fragment.sn !== snToRemove);
+    }
+    delete this.fragments[fragKey];
+    if (fragment.endList) {
+      delete this.endListFragments[fragment.type];
+    }
+  }
+  removeAllFragments() {
+    var _this$hls;
+    this.fragments = Object.create(null);
+    this.endListFragments = Object.create(null);
+    this.activePartLists = Object.create(null);
+    this.hasGaps = false;
+    const partlist = (_this$hls = this.hls) == null || (_this$hls = _this$hls.latestLevelDetails) == null ? void 0 : _this$hls.partList;
+    if (partlist) {
+      partlist.forEach(part => part.clearElementaryStreamInfo());
+    }
+  }
+}
+function isPartial(fragmentEntity) {
+  var _fragmentEntity$range, _fragmentEntity$range2, _fragmentEntity$range3;
+  return fragmentEntity.buffered && !!(fragmentEntity.body.gap || (_fragmentEntity$range = fragmentEntity.range.video) != null && _fragmentEntity$range.partial || (_fragmentEntity$range2 = fragmentEntity.range.audio) != null && _fragmentEntity$range2.partial || (_fragmentEntity$range3 = fragmentEntity.range.audiovideo) != null && _fragmentEntity$range3.partial);
+}
+function getFragmentKey(fragment) {
+  return `${fragment.type}_${fragment.level}_${fragment.sn}`;
+}
+function filterParts(partList, predicate) {
+  return partList.filter(part => {
+    const keep = predicate(part);
+    if (!keep) {
+      part.clearElementaryStreamInfo();
+    }
+    return keep;
+  });
+}
+
+var DecrypterAesMode = {
+  cbc: 0,
+  ctr: 1
+};
+
+class AESCrypto {
+  constructor(subtle, iv, aesMode) {
+    this.subtle = void 0;
+    this.aesIV = void 0;
+    this.aesMode = void 0;
+    this.subtle = subtle;
+    this.aesIV = iv;
+    this.aesMode = aesMode;
+  }
+  decrypt(data, key) {
+    switch (this.aesMode) {
+      case DecrypterAesMode.cbc:
+        return this.subtle.decrypt({
+          name: 'AES-CBC',
+          iv: this.aesIV
+        }, key, data);
+      case DecrypterAesMode.ctr:
+        return this.subtle.decrypt({
+          name: 'AES-CTR',
+          counter: this.aesIV,
+          length: 64
+        },
+        //64 : NIST SP800-38A standard suggests that the counter should occupy half of the counter block
+        key, data);
+      default:
+        throw new Error(`[AESCrypto] invalid aes mode ${this.aesMode}`);
+    }
+  }
+}
+
+// PKCS7
+function removePadding(array) {
+  const outputBytes = array.byteLength;
+  const paddingBytes = outputBytes && new DataView(array.buffer).getUint8(outputBytes - 1);
+  if (paddingBytes) {
+    return array.slice(0, outputBytes - paddingBytes);
+  }
+  return array;
+}
+class AESDecryptor {
+  constructor() {
+    this.rcon = [0x0, 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36];
+    this.subMix = [new Uint32Array(256), new Uint32Array(256), new Uint32Array(256), new Uint32Array(256)];
+    this.invSubMix = [new Uint32Array(256), new Uint32Array(256), new Uint32Array(256), new Uint32Array(256)];
+    this.sBox = new Uint32Array(256);
+    this.invSBox = new Uint32Array(256);
+    this.key = new Uint32Array(0);
+    this.ksRows = 0;
+    this.keySize = 0;
+    this.keySchedule = void 0;
+    this.invKeySchedule = void 0;
+    this.initTable();
+  }
+
+  // Using view.getUint32() also swaps the byte order.
+  uint8ArrayToUint32Array_(arrayBuffer) {
+    const view = new DataView(arrayBuffer);
+    const newArray = new Uint32Array(4);
+    for (let i = 0; i < 4; i++) {
+      newArray[i] = view.getUint32(i * 4);
+    }
+    return newArray;
+  }
+  initTable() {
+    const sBox = this.sBox;
+    const invSBox = this.invSBox;
+    const subMix = this.subMix;
+    const subMix0 = subMix[0];
+    const subMix1 = subMix[1];
+    const subMix2 = subMix[2];
+    const subMix3 = subMix[3];
+    const invSubMix = this.invSubMix;
+    const invSubMix0 = invSubMix[0];
+    const invSubMix1 = invSubMix[1];
+    const invSubMix2 = invSubMix[2];
+    const invSubMix3 = invSubMix[3];
+    const d = new Uint32Array(256);
+    let x = 0;
+    let xi = 0;
+    let i = 0;
+    for (i = 0; i < 256; i++) {
+      if (i < 128) {
+        d[i] = i << 1;
+      } else {
+        d[i] = i << 1 ^ 0x11b;
+      }
+    }
+    for (i = 0; i < 256; i++) {
+      let sx = xi ^ xi << 1 ^ xi << 2 ^ xi << 3 ^ xi << 4;
+      sx = sx >>> 8 ^ sx & 0xff ^ 0x63;
+      sBox[x] = sx;
+      invSBox[sx] = x;
+
+      // Compute multiplication
+      const x2 = d[x];
+      const x4 = d[x2];
+      const x8 = d[x4];
+
+      // Compute sub/invSub bytes, mix columns tables
+      let t = d[sx] * 0x101 ^ sx * 0x1010100;
+      subMix0[x] = t << 24 | t >>> 8;
+      subMix1[x] = t << 16 | t >>> 16;
+      subMix2[x] = t << 8 | t >>> 24;
+      subMix3[x] = t;
+
+      // Compute inv sub bytes, inv mix columns tables
+      t = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;
+      invSubMix0[sx] = t << 24 | t >>> 8;
+      invSubMix1[sx] = t << 16 | t >>> 16;
+      invSubMix2[sx] = t << 8 | t >>> 24;
+      invSubMix3[sx] = t;
+
+      // Compute next counter
+      if (!x) {
+        x = xi = 1;
+      } else {
+        x = x2 ^ d[d[d[x8 ^ x2]]];
+        xi ^= d[d[xi]];
+      }
+    }
+  }
+  expandKey(keyBuffer) {
+    // convert keyBuffer to Uint32Array
+    const key = this.uint8ArrayToUint32Array_(keyBuffer);
+    let sameKey = true;
+    let offset = 0;
+    while (offset < key.length && sameKey) {
+      sameKey = key[offset] === this.key[offset];
+      offset++;
+    }
+    if (sameKey) {
+      return;
+    }
+    this.key = key;
+    const keySize = this.keySize = key.length;
+    if (keySize !== 4 && keySize !== 6 && keySize !== 8) {
+      throw new Error('Invalid aes key size=' + keySize);
+    }
+    const ksRows = this.ksRows = (keySize + 6 + 1) * 4;
+    let ksRow;
+    let invKsRow;
+    const keySchedule = this.keySchedule = new Uint32Array(ksRows);
+    const invKeySchedule = this.invKeySchedule = new Uint32Array(ksRows);
+    const sbox = this.sBox;
+    const rcon = this.rcon;
+    const invSubMix = this.invSubMix;
+    const invSubMix0 = invSubMix[0];
+    const invSubMix1 = invSubMix[1];
+    const invSubMix2 = invSubMix[2];
+    const invSubMix3 = invSubMix[3];
+    let prev;
+    let t;
+    for (ksRow = 0; ksRow < ksRows; ksRow++) {
+      if (ksRow < keySize) {
+        prev = keySchedule[ksRow] = key[ksRow];
+        continue;
+      }
+      t = prev;
+      if (ksRow % keySize === 0) {
+        // Rot word
+        t = t << 8 | t >>> 24;
+
+        // Sub word
+        t = sbox[t >>> 24] << 24 | sbox[t >>> 16 & 0xff] << 16 | sbox[t >>> 8 & 0xff] << 8 | sbox[t & 0xff];
+
+        // Mix Rcon
+        t ^= rcon[ksRow / keySize | 0] << 24;
+      } else if (keySize > 6 && ksRow % keySize === 4) {
+        // Sub word
+        t = sbox[t >>> 24] << 24 | sbox[t >>> 16 & 0xff] << 16 | sbox[t >>> 8 & 0xff] << 8 | sbox[t & 0xff];
+      }
+      keySchedule[ksRow] = prev = (keySchedule[ksRow - keySize] ^ t) >>> 0;
+    }
+    for (invKsRow = 0; invKsRow < ksRows; invKsRow++) {
+      ksRow = ksRows - invKsRow;
+      if (invKsRow & 3) {
+        t = keySchedule[ksRow];
+      } else {
+        t = keySchedule[ksRow - 4];
+      }
+      if (invKsRow < 4 || ksRow <= 4) {
+        invKeySchedule[invKsRow] = t;
+      } else {
+        invKeySchedule[invKsRow] = invSubMix0[sbox[t >>> 24]] ^ invSubMix1[sbox[t >>> 16 & 0xff]] ^ invSubMix2[sbox[t >>> 8 & 0xff]] ^ invSubMix3[sbox[t & 0xff]];
+      }
+      invKeySchedule[invKsRow] = invKeySchedule[invKsRow] >>> 0;
+    }
+  }
+
+  // Adding this as a method greatly improves performance.
+  networkToHostOrderSwap(word) {
+    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;
+  }
+  decrypt(inputArrayBuffer, offset, aesIV) {
+    const nRounds = this.keySize + 6;
+    const invKeySchedule = this.invKeySchedule;
+    const invSBOX = this.invSBox;
+    const invSubMix = this.invSubMix;
+    const invSubMix0 = invSubMix[0];
+    const invSubMix1 = invSubMix[1];
+    const invSubMix2 = invSubMix[2];
+    const invSubMix3 = invSubMix[3];
+    const initVector = this.uint8ArrayToUint32Array_(aesIV);
+    let initVector0 = initVector[0];
+    let initVector1 = initVector[1];
+    let initVector2 = initVector[2];
+    let initVector3 = initVector[3];
+    const inputInt32 = new Int32Array(inputArrayBuffer);
+    const outputInt32 = new Int32Array(inputInt32.length);
+    let t0, t1, t2, t3;
+    let s0, s1, s2, s3;
+    let inputWords0, inputWords1, inputWords2, inputWords3;
+    let ksRow, i;
+    const swapWord = this.networkToHostOrderSwap;
+    while (offset < inputInt32.length) {
+      inputWords0 = swapWord(inputInt32[offset]);
+      inputWords1 = swapWord(inputInt32[offset + 1]);
+      inputWords2 = swapWord(inputInt32[offset + 2]);
+      inputWords3 = swapWord(inputInt32[offset + 3]);
+      s0 = inputWords0 ^ invKeySchedule[0];
+      s1 = inputWords3 ^ invKeySchedule[1];
+      s2 = inputWords2 ^ invKeySchedule[2];
+      s3 = inputWords1 ^ invKeySchedule[3];
+      ksRow = 4;
+
+      // Iterate through the rounds of decryption
+      for (i = 1; i < nRounds; i++) {
+        t0 = invSubMix0[s0 >>> 24] ^ invSubMix1[s1 >> 16 & 0xff] ^ invSubMix2[s2 >> 8 & 0xff] ^ invSubMix3[s3 & 0xff] ^ invKeySchedule[ksRow];
+        t1 = invSubMix0[s1 >>> 24] ^ invSubMix1[s2 >> 16 & 0xff] ^ invSubMix2[s3 >> 8 & 0xff] ^ invSubMix3[s0 & 0xff] ^ invKeySchedule[ksRow + 1];
+        t2 = invSubMix0[s2 >>> 24] ^ invSubMix1[s3 >> 16 & 0xff] ^ invSubMix2[s0 >> 8 & 0xff] ^ invSubMix3[s1 & 0xff] ^ invKeySchedule[ksRow + 2];
+        t3 = invSubMix0[s3 >>> 24] ^ invSubMix1[s0 >> 16 & 0xff] ^ invSubMix2[s1 >> 8 & 0xff] ^ invSubMix3[s2 & 0xff] ^ invKeySchedule[ksRow + 3];
+        // Update state
+        s0 = t0;
+        s1 = t1;
+        s2 = t2;
+        s3 = t3;
+        ksRow = ksRow + 4;
+      }
+
+      // Shift rows, sub bytes, add round key
+      t0 = invSBOX[s0 >>> 24] << 24 ^ invSBOX[s1 >> 16 & 0xff] << 16 ^ invSBOX[s2 >> 8 & 0xff] << 8 ^ invSBOX[s3 & 0xff] ^ invKeySchedule[ksRow];
+      t1 = invSBOX[s1 >>> 24] << 24 ^ invSBOX[s2 >> 16 & 0xff] << 16 ^ invSBOX[s3 >> 8 & 0xff] << 8 ^ invSBOX[s0 & 0xff] ^ invKeySchedule[ksRow + 1];
+      t2 = invSBOX[s2 >>> 24] << 24 ^ invSBOX[s3 >> 16 & 0xff] << 16 ^ invSBOX[s0 >> 8 & 0xff] << 8 ^ invSBOX[s1 & 0xff] ^ invKeySchedule[ksRow + 2];
+      t3 = invSBOX[s3 >>> 24] << 24 ^ invSBOX[s0 >> 16 & 0xff] << 16 ^ invSBOX[s1 >> 8 & 0xff] << 8 ^ invSBOX[s2 & 0xff] ^ invKeySchedule[ksRow + 3];
+
+      // Write
+      outputInt32[offset] = swapWord(t0 ^ initVector0);
+      outputInt32[offset + 1] = swapWord(t3 ^ initVector1);
+      outputInt32[offset + 2] = swapWord(t2 ^ initVector2);
+      outputInt32[offset + 3] = swapWord(t1 ^ initVector3);
+
+      // reset initVector to last 4 unsigned int
+      initVector0 = inputWords0;
+      initVector1 = inputWords1;
+      initVector2 = inputWords2;
+      initVector3 = inputWords3;
+      offset = offset + 4;
+    }
+    return outputInt32.buffer;
+  }
+}
+
+class FastAESKey {
+  constructor(subtle, key, aesMode) {
+    this.subtle = void 0;
+    this.key = void 0;
+    this.aesMode = void 0;
+    this.subtle = subtle;
+    this.key = key;
+    this.aesMode = aesMode;
+  }
+  expandKey() {
+    const subtleAlgoName = getSubtleAlgoName(this.aesMode);
+    return this.subtle.importKey('raw', this.key, {
+      name: subtleAlgoName
+    }, false, ['encrypt', 'decrypt']);
+  }
+}
+function getSubtleAlgoName(aesMode) {
+  switch (aesMode) {
+    case DecrypterAesMode.cbc:
+      return 'AES-CBC';
+    case DecrypterAesMode.ctr:
+      return 'AES-CTR';
+    default:
+      throw new Error(`[FastAESKey] invalid aes mode ${aesMode}`);
+  }
+}
+
+const CHUNK_SIZE = 16; // 16 bytes, 128 bits
+
+class Decrypter {
+  constructor(config, {
+    removePKCS7Padding = true
+  } = {}) {
+    this.logEnabled = true;
+    this.removePKCS7Padding = void 0;
+    this.subtle = null;
+    this.softwareDecrypter = null;
+    this.key = null;
+    this.fastAesKey = null;
+    this.remainderData = null;
+    this.currentIV = null;
+    this.currentResult = null;
+    this.useSoftware = void 0;
+    this.enableSoftwareAES = void 0;
+    this.enableSoftwareAES = config.enableSoftwareAES;
+    this.removePKCS7Padding = removePKCS7Padding;
+    // built in decryptor expects PKCS7 padding
+    if (removePKCS7Padding) {
+      try {
+        const browserCrypto = self.crypto;
+        if (browserCrypto) {
+          this.subtle = browserCrypto.subtle || browserCrypto.webkitSubtle;
+        }
+      } catch (e) {
+        /* no-op */
+      }
+    }
+    this.useSoftware = !this.subtle;
+  }
+  destroy() {
+    this.subtle = null;
+    this.softwareDecrypter = null;
+    this.key = null;
+    this.fastAesKey = null;
+    this.remainderData = null;
+    this.currentIV = null;
+    this.currentResult = null;
+  }
+  isSync() {
+    return this.useSoftware;
+  }
+  flush() {
+    const {
+      currentResult,
+      remainderData
+    } = this;
+    if (!currentResult || remainderData) {
+      this.reset();
+      return null;
+    }
+    const data = new Uint8Array(currentResult);
+    this.reset();
+    if (this.removePKCS7Padding) {
+      return removePadding(data);
+    }
+    return data;
+  }
+  reset() {
+    this.currentResult = null;
+    this.currentIV = null;
+    this.remainderData = null;
+    if (this.softwareDecrypter) {
+      this.softwareDecrypter = null;
+    }
+  }
+  decrypt(data, key, iv, aesMode) {
+    if (this.useSoftware) {
+      return new Promise((resolve, reject) => {
+        const dataView = ArrayBuffer.isView(data) ? data : new Uint8Array(data);
+        this.softwareDecrypt(dataView, key, iv, aesMode);
+        const decryptResult = this.flush();
+        if (decryptResult) {
+          resolve(decryptResult.buffer);
+        } else {
+          reject(new Error('[softwareDecrypt] Failed to decrypt data'));
+        }
+      });
+    }
+    return this.webCryptoDecrypt(new Uint8Array(data), key, iv, aesMode);
+  }
+
+  // Software decryption is progressive. Progressive decryption may not return a result on each call. Any cached
+  // data is handled in the flush() call
+  softwareDecrypt(data, key, iv, aesMode) {
+    const {
+      currentIV,
+      currentResult,
+      remainderData
+    } = this;
+    if (aesMode !== DecrypterAesMode.cbc || key.byteLength !== 16) {
+      logger.warn('SoftwareDecrypt: can only handle AES-128-CBC');
+      return null;
+    }
+    this.logOnce('JS AES decrypt');
+    // The output is staggered during progressive parsing - the current result is cached, and emitted on the next call
+    // This is done in order to strip PKCS7 padding, which is found at the end of each segment. We only know we've reached
+    // the end on flush(), but by that time we have already received all bytes for the segment.
+    // Progressive decryption does not work with WebCrypto
+
+    if (remainderData) {
+      data = appendUint8Array(remainderData, data);
+      this.remainderData = null;
+    }
+
+    // Byte length must be a multiple of 16 (AES-128 = 128 bit blocks = 16 bytes)
+    const currentChunk = this.getValidChunk(data);
+    if (!currentChunk.length) {
+      return null;
+    }
+    if (currentIV) {
+      iv = currentIV;
+    }
+    let softwareDecrypter = this.softwareDecrypter;
+    if (!softwareDecrypter) {
+      softwareDecrypter = this.softwareDecrypter = new AESDecryptor();
+    }
+    softwareDecrypter.expandKey(key);
+    const result = currentResult;
+    this.currentResult = softwareDecrypter.decrypt(currentChunk.buffer, 0, iv);
+    this.currentIV = currentChunk.slice(-16).buffer;
+    if (!result) {
+      return null;
+    }
+    return result;
+  }
+  webCryptoDecrypt(data, key, iv, aesMode) {
+    if (this.key !== key || !this.fastAesKey) {
+      if (!this.subtle) {
+        return Promise.resolve(this.onWebCryptoError(data, key, iv, aesMode));
+      }
+      this.key = key;
+      this.fastAesKey = new FastAESKey(this.subtle, key, aesMode);
+    }
+    return this.fastAesKey.expandKey().then(aesKey => {
+      // decrypt using web crypto
+      if (!this.subtle) {
+        return Promise.reject(new Error('web crypto not initialized'));
+      }
+      this.logOnce('WebCrypto AES decrypt');
+      const crypto = new AESCrypto(this.subtle, new Uint8Array(iv), aesMode);
+      return crypto.decrypt(data.buffer, aesKey);
+    }).catch(err => {
+      logger.warn(`[decrypter]: WebCrypto Error, disable WebCrypto API, ${err.name}: ${err.message}`);
+      return this.onWebCryptoError(data, key, iv, aesMode);
+    });
+  }
+  onWebCryptoError(data, key, iv, aesMode) {
+    const enableSoftwareAES = this.enableSoftwareAES;
+    if (enableSoftwareAES) {
+      this.useSoftware = true;
+      this.logEnabled = true;
+      this.softwareDecrypt(data, key, iv, aesMode);
+      const decryptResult = this.flush();
+      if (decryptResult) {
+        return decryptResult.buffer;
+      }
+    }
+    throw new Error('WebCrypto' + (enableSoftwareAES ? ' and softwareDecrypt' : '') + ': failed to decrypt data');
+  }
+  getValidChunk(data) {
+    let currentChunk = data;
+    const splitPoint = data.length - data.length % CHUNK_SIZE;
+    if (splitPoint !== data.length) {
+      currentChunk = data.slice(0, splitPoint);
+      this.remainderData = data.slice(splitPoint);
+    }
+    return currentChunk;
+  }
+  logOnce(msg) {
+    if (!this.logEnabled) {
+      return;
+    }
+    logger.log(`[decrypter]: ${msg}`);
+    this.logEnabled = false;
+  }
+}
+
+const MIN_CHUNK_SIZE = Math.pow(2, 17); // 128kb
+
+class FragmentLoader {
+  constructor(config) {
+    this.config = void 0;
+    this.loader = null;
+    this.partLoadTimeout = -1;
+    this.config = config;
+  }
+  destroy() {
+    if (this.loader) {
+      this.loader.destroy();
+      this.loader = null;
+    }
+  }
+  abort() {
+    if (this.loader) {
+      // Abort the loader for current fragment. Only one may load at any given time
+      this.loader.abort();
+    }
+  }
+  load(frag, onProgress) {
+    const url = frag.url;
+    if (!url) {
+      return Promise.reject(new LoadError({
+        type: ErrorTypes.NETWORK_ERROR,
+        details: ErrorDetails.FRAG_LOAD_ERROR,
+        fatal: false,
+        frag,
+        error: new Error(`Fragment does not have a ${url ? 'part list' : 'url'}`),
+        networkDetails: null
+      }));
+    }
+    this.abort();
+    const config = this.config;
+    const FragmentILoader = config.fLoader;
+    const DefaultILoader = config.loader;
+    return new Promise((resolve, reject) => {
+      if (this.loader) {
+        this.loader.destroy();
+      }
+      if (frag.gap) {
+        if (frag.tagList.some(tags => tags[0] === 'GAP')) {
+          reject(createGapLoadError(frag));
+          return;
+        } else {
+          // Reset temporary treatment as GAP tag
+          frag.gap = false;
+        }
+      }
+      const loader = this.loader = FragmentILoader ? new FragmentILoader(config) : new DefaultILoader(config);
+      const loaderContext = createLoaderContext(frag);
+      frag.loader = loader;
+      const loadPolicy = getLoaderConfigWithoutReties(config.fragLoadPolicy.default);
+      const loaderConfig = {
+        loadPolicy,
+        timeout: loadPolicy.maxLoadTimeMs,
+        maxRetry: 0,
+        retryDelay: 0,
+        maxRetryDelay: 0,
+        highWaterMark: frag.sn === 'initSegment' ? Infinity : MIN_CHUNK_SIZE
+      };
+      // Assign frag stats to the loader's stats reference
+      frag.stats = loader.stats;
+      const callbacks = {
+        onSuccess: (response, stats, context, networkDetails) => {
+          this.resetLoader(frag, loader);
+          let payload = response.data;
+          if (context.resetIV && frag.decryptdata) {
+            frag.decryptdata.iv = new Uint8Array(payload.slice(0, 16));
+            payload = payload.slice(16);
+          }
+          resolve({
+            frag,
+            part: null,
+            payload,
+            networkDetails
+          });
+        },
+        onError: (response, context, networkDetails, stats) => {
+          this.resetLoader(frag, loader);
+          reject(new LoadError({
+            type: ErrorTypes.NETWORK_ERROR,
+            details: ErrorDetails.FRAG_LOAD_ERROR,
+            fatal: false,
+            frag,
+            response: _objectSpread2({
+              url,
+              data: undefined
+            }, response),
+            error: new Error(`HTTP Error ${response.code} ${response.text}`),
+            networkDetails,
+            stats
+          }));
+        },
+        onAbort: (stats, context, networkDetails) => {
+          this.resetLoader(frag, loader);
+          reject(new LoadError({
+            type: ErrorTypes.NETWORK_ERROR,
+            details: ErrorDetails.INTERNAL_ABORTED,
+            fatal: false,
+            frag,
+            error: new Error('Aborted'),
+            networkDetails,
+            stats
+          }));
+        },
+        onTimeout: (stats, context, networkDetails) => {
+          this.resetLoader(frag, loader);
+          reject(new LoadError({
+            type: ErrorTypes.NETWORK_ERROR,
+            details: ErrorDetails.FRAG_LOAD_TIMEOUT,
+            fatal: false,
+            frag,
+            error: new Error(`Timeout after ${loaderConfig.timeout}ms`),
+            networkDetails,
+            stats
+          }));
+        }
+      };
+      if (onProgress) {
+        callbacks.onProgress = (stats, context, data, networkDetails) => onProgress({
+          frag,
+          part: null,
+          payload: data,
+          networkDetails
+        });
+      }
+      loader.load(loaderContext, loaderConfig, callbacks);
+    });
+  }
+  loadPart(frag, part, onProgress) {
+    this.abort();
+    const config = this.config;
+    const FragmentILoader = config.fLoader;
+    const DefaultILoader = config.loader;
+    return new Promise((resolve, reject) => {
+      if (this.loader) {
+        this.loader.destroy();
+      }
+      if (frag.gap || part.gap) {
+        reject(createGapLoadError(frag, part));
+        return;
+      }
+      const loader = this.loader = FragmentILoader ? new FragmentILoader(config) : new DefaultILoader(config);
+      const loaderContext = createLoaderContext(frag, part);
+      frag.loader = loader;
+      // Should we define another load policy for parts?
+      const loadPolicy = getLoaderConfigWithoutReties(config.fragLoadPolicy.default);
+      const loaderConfig = {
+        loadPolicy,
+        timeout: loadPolicy.maxLoadTimeMs,
+        maxRetry: 0,
+        retryDelay: 0,
+        maxRetryDelay: 0,
+        highWaterMark: MIN_CHUNK_SIZE
+      };
+      // Assign part stats to the loader's stats reference
+      part.stats = loader.stats;
+      loader.load(loaderContext, loaderConfig, {
+        onSuccess: (response, stats, context, networkDetails) => {
+          this.resetLoader(frag, loader);
+          this.updateStatsFromPart(frag, part);
+          const partLoadedData = {
+            frag,
+            part,
+            payload: response.data,
+            networkDetails
+          };
+          onProgress(partLoadedData);
+          resolve(partLoadedData);
+        },
+        onError: (response, context, networkDetails, stats) => {
+          this.resetLoader(frag, loader);
+          reject(new LoadError({
+            type: ErrorTypes.NETWORK_ERROR,
+            details: ErrorDetails.FRAG_LOAD_ERROR,
+            fatal: false,
+            frag,
+            part,
+            response: _objectSpread2({
+              url: loaderContext.url,
+              data: undefined
+            }, response),
+            error: new Error(`HTTP Error ${response.code} ${response.text}`),
+            networkDetails,
+            stats
+          }));
+        },
+        onAbort: (stats, context, networkDetails) => {
+          frag.stats.aborted = part.stats.aborted;
+          this.resetLoader(frag, loader);
+          reject(new LoadError({
+            type: ErrorTypes.NETWORK_ERROR,
+            details: ErrorDetails.INTERNAL_ABORTED,
+            fatal: false,
+            frag,
+            part,
+            error: new Error('Aborted'),
+            networkDetails,
+            stats
+          }));
+        },
+        onTimeout: (stats, context, networkDetails) => {
+          this.resetLoader(frag, loader);
+          reject(new LoadError({
+            type: ErrorTypes.NETWORK_ERROR,
+            details: ErrorDetails.FRAG_LOAD_TIMEOUT,
+            fatal: false,
+            frag,
+            part,
+            error: new Error(`Timeout after ${loaderConfig.timeout}ms`),
+            networkDetails,
+            stats
+          }));
+        }
+      });
+    });
+  }
+  updateStatsFromPart(frag, part) {
+    const fragStats = frag.stats;
+    const partStats = part.stats;
+    const partTotal = partStats.total;
+    fragStats.loaded += partStats.loaded;
+    if (partTotal) {
+      const estTotalParts = Math.round(frag.duration / part.duration);
+      const estLoadedParts = Math.min(Math.round(fragStats.loaded / partTotal), estTotalParts);
+      const estRemainingParts = estTotalParts - estLoadedParts;
+      const estRemainingBytes = estRemainingParts * Math.round(fragStats.loaded / estLoadedParts);
+      fragStats.total = fragStats.loaded + estRemainingBytes;
+    } else {
+      fragStats.total = Math.max(fragStats.loaded, fragStats.total);
+    }
+    const fragLoading = fragStats.loading;
+    const partLoading = partStats.loading;
+    if (fragLoading.start) {
+      // add to fragment loader latency
+      fragLoading.first += partLoading.first - partLoading.start;
+    } else {
+      fragLoading.start = partLoading.start;
+      fragLoading.first = partLoading.first;
+    }
+    fragLoading.end = partLoading.end;
+  }
+  resetLoader(frag, loader) {
+    frag.loader = null;
+    if (this.loader === loader) {
+      self.clearTimeout(this.partLoadTimeout);
+      this.loader = null;
+    }
+    loader.destroy();
+  }
+}
+function createLoaderContext(frag, part = null) {
+  const segment = part || frag;
+  const loaderContext = {
+    frag,
+    part,
+    responseType: 'arraybuffer',
+    url: segment.url,
+    headers: {},
+    rangeStart: 0,
+    rangeEnd: 0
+  };
+  const start = segment.byteRangeStartOffset;
+  const end = segment.byteRangeEndOffset;
+  if (isFiniteNumber(start) && isFiniteNumber(end)) {
+    var _frag$decryptdata;
+    let byteRangeStart = start;
+    let byteRangeEnd = end;
+    if (frag.sn === 'initSegment' && isMethodFullSegmentAesCbc((_frag$decryptdata = frag.decryptdata) == null ? void 0 : _frag$decryptdata.method)) {
+      // MAP segment encrypted with method 'AES-128' or 'AES-256' (cbc), when served with HTTP Range,
+      // has the unencrypted size specified in the range.
+      // Ref: https://tools.ietf.org/html/draft-pantos-hls-rfc8216bis-08#section-6.3.6
+      const fragmentLen = end - start;
+      if (fragmentLen % 16) {
+        byteRangeEnd = end + (16 - fragmentLen % 16);
+      }
+      if (start !== 0) {
+        loaderContext.resetIV = true;
+        byteRangeStart = start - 16;
+      }
+    }
+    loaderContext.rangeStart = byteRangeStart;
+    loaderContext.rangeEnd = byteRangeEnd;
+  }
+  return loaderContext;
+}
+function createGapLoadError(frag, part) {
+  const error = new Error(`GAP ${frag.gap ? 'tag' : 'attribute'} found`);
+  const errorData = {
+    type: ErrorTypes.MEDIA_ERROR,
+    details: ErrorDetails.FRAG_GAP,
+    fatal: false,
+    frag,
+    error,
+    networkDetails: null
+  };
+  if (part) {
+    errorData.part = part;
+  }
+  (part ? part : frag).stats.aborted = true;
+  return new LoadError(errorData);
+}
+function isMethodFullSegmentAesCbc(method) {
+  return method === 'AES-128' || method === 'AES-256';
+}
+class LoadError extends Error {
+  constructor(data) {
+    super(data.error.message);
+    this.data = void 0;
+    this.data = data;
+  }
+}
+
+/**
+ * @ignore
+ * Sub-class specialization of EventHandler base class.
+ *
+ * TaskLoop allows to schedule a task function being called (optionnaly repeatedly) on the main loop,
+ * scheduled asynchroneously, avoiding recursive calls in the same tick.
+ *
+ * The task itself is implemented in `doTick`. It can be requested and called for single execution
+ * using the `tick` method.
+ *
+ * It will be assured that the task execution method (`tick`) only gets called once per main loop "tick",
+ * no matter how often it gets requested for execution. Execution in further ticks will be scheduled accordingly.
+ *
+ * If further execution requests have already been scheduled on the next tick, it can be checked with `hasNextTick`,
+ * and cancelled with `clearNextTick`.
+ *
+ * The task can be scheduled as an interval repeatedly with a period as parameter (see `setInterval`, `clearInterval`).
+ *
+ * Sub-classes need to implement the `doTick` method which will effectively have the task execution routine.
+ *
+ * Further explanations:
+ *
+ * The baseclass has a `tick` method that will schedule the doTick call. It may be called synchroneously
+ * only for a stack-depth of one. On re-entrant calls, sub-sequent calls are scheduled for next main loop ticks.
+ *
+ * When the task execution (`tick` method) is called in re-entrant way this is detected and
+ * we are limiting the task execution per call stack to exactly one, but scheduling/post-poning further
+ * task processing on the next main loop iteration (also known as "next tick" in the Node/JS runtime lingo).
+ */
+class TaskLoop extends Logger {
+  constructor(label, logger) {
+    super(label, logger);
+    this._boundTick = void 0;
+    this._tickTimer = null;
+    this._tickInterval = null;
+    this._tickCallCount = 0;
+    this._boundTick = this.tick.bind(this);
+  }
+  destroy() {
+    this.onHandlerDestroying();
+    this.onHandlerDestroyed();
+  }
+  onHandlerDestroying() {
+    // clear all timers before unregistering from event bus
+    this.clearNextTick();
+    this.clearInterval();
+  }
+  onHandlerDestroyed() {}
+  hasInterval() {
+    return !!this._tickInterval;
+  }
+  hasNextTick() {
+    return !!this._tickTimer;
+  }
+
+  /**
+   * @param millis - Interval time (ms)
+   * @eturns True when interval has been scheduled, false when already scheduled (no effect)
+   */
+  setInterval(millis) {
+    if (!this._tickInterval) {
+      this._tickCallCount = 0;
+      this._tickInterval = self.setInterval(this._boundTick, millis);
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * @returns True when interval was cleared, false when none was set (no effect)
+   */
+  clearInterval() {
+    if (this._tickInterval) {
+      self.clearInterval(this._tickInterval);
+      this._tickInterval = null;
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * @returns True when timeout was cleared, false when none was set (no effect)
+   */
+  clearNextTick() {
+    if (this._tickTimer) {
+      self.clearTimeout(this._tickTimer);
+      this._tickTimer = null;
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Will call the subclass doTick implementation in this main loop tick
+   * or in the next one (via setTimeout(,0)) in case it has already been called
+   * in this tick (in case this is a re-entrant call).
+   */
+  tick() {
+    this._tickCallCount++;
+    if (this._tickCallCount === 1) {
+      this.doTick();
+      // re-entrant call to tick from previous doTick call stack
+      // -> schedule a call on the next main loop iteration to process this task processing request
+      if (this._tickCallCount > 1) {
+        // make sure only one timer exists at any time at max
+        this.tickImmediate();
+      }
+      this._tickCallCount = 0;
+    }
+  }
+  tickImmediate() {
+    this.clearNextTick();
+    this._tickTimer = self.setTimeout(this._boundTick, 0);
+  }
+
+  /**
+   * For subclass to implement task logic
+   * @abstract
+   */
+  doTick() {}
+}
+
+class ChunkMetadata {
+  constructor(level, sn, id, size = 0, part = -1, partial = false) {
+    this.level = void 0;
+    this.sn = void 0;
+    this.part = void 0;
+    this.id = void 0;
+    this.size = void 0;
+    this.partial = void 0;
+    this.transmuxing = getNewPerformanceTiming();
+    this.buffering = {
+      audio: getNewPerformanceTiming(),
+      video: getNewPerformanceTiming(),
+      audiovideo: getNewPerformanceTiming()
+    };
+    this.level = level;
+    this.sn = sn;
+    this.id = id;
+    this.size = size;
+    this.part = part;
+    this.partial = partial;
+  }
+}
+function getNewPerformanceTiming() {
+  return {
+    start: 0,
+    executeStart: 0,
+    executeEnd: 0,
+    end: 0
+  };
+}
+
+/**
+ * Provides methods dealing with buffer length retrieval for example.
+ *
+ * In general, a helper around HTML5 MediaElement TimeRanges gathered from `buffered` property.
+ *
+ * Also @see https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/buffered
+ */
+
+const noopBuffered = {
+  length: 0,
+  start: () => 0,
+  end: () => 0
+};
+class BufferHelper {
+  /**
+   * Return true if `media`'s buffered include `position`
+   */
+  static isBuffered(media, position) {
+    if (media) {
+      const buffered = BufferHelper.getBuffered(media);
+      for (let i = buffered.length; i--;) {
+        if (position >= buffered.start(i) && position <= buffered.end(i)) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+  static bufferedRanges(media) {
+    if (media) {
+      const timeRanges = BufferHelper.getBuffered(media);
+      return BufferHelper.timeRangesToArray(timeRanges);
+    }
+    return [];
+  }
+  static timeRangesToArray(timeRanges) {
+    const buffered = [];
+    for (let i = 0; i < timeRanges.length; i++) {
+      buffered.push({
+        start: timeRanges.start(i),
+        end: timeRanges.end(i)
+      });
+    }
+    return buffered;
+  }
+  static bufferInfo(media, pos, maxHoleDuration) {
+    if (media) {
+      const buffered = BufferHelper.bufferedRanges(media);
+      if (buffered.length) {
+        return BufferHelper.bufferedInfo(buffered, pos, maxHoleDuration);
+      }
+    }
+    return {
+      len: 0,
+      start: pos,
+      end: pos,
+      bufferedIndex: -1
+    };
+  }
+  static bufferedInfo(buffered, pos, maxHoleDuration) {
+    pos = Math.max(0, pos);
+    // sort on buffer.start/smaller end (IE does not always return sorted buffered range)
+    if (buffered.length > 1) {
+      buffered.sort((a, b) => a.start - b.start || b.end - a.end);
+    }
+    let bufferedIndex = -1;
+    let buffered2 = [];
+    if (maxHoleDuration) {
+      // there might be some small holes between buffer time range
+      // consider that holes smaller than maxHoleDuration are irrelevant and build another
+      // buffer time range representations that discards those holes
+      for (let i = 0; i < buffered.length; i++) {
+        if (pos >= buffered[i].start && pos <= buffered[i].end) {
+          bufferedIndex = i;
+        }
+        const buf2len = buffered2.length;
+        if (buf2len) {
+          const buf2end = buffered2[buf2len - 1].end;
+          // if small hole (value between 0 or maxHoleDuration ) or overlapping (negative)
+          if (buffered[i].start - buf2end < maxHoleDuration) {
+            // merge overlapping time ranges
+            // update lastRange.end only if smaller than item.end
+            // e.g.  [ 1, 15] with  [ 2,8] => [ 1,15] (no need to modify lastRange.end)
+            // whereas [ 1, 8] with  [ 2,15] => [ 1,15] ( lastRange should switch from [1,8] to [1,15])
+            if (buffered[i].end > buf2end) {
+              buffered2[buf2len - 1].end = buffered[i].end;
+            }
+          } else {
+            // big hole
+            buffered2.push(buffered[i]);
+          }
+        } else {
+          // first value
+          buffered2.push(buffered[i]);
+        }
+      }
+    } else {
+      buffered2 = buffered;
+    }
+    let bufferLen = 0;
+    let nextStart;
+
+    // bufferStart and bufferEnd are buffer boundaries around current playback position (pos)
+    let bufferStart = pos;
+    let bufferEnd = pos;
+    for (let i = 0; i < buffered2.length; i++) {
+      const start = buffered2[i].start;
+      const end = buffered2[i].end;
+      // logger.log('buf start/end:' + buffered.start(i) + '/' + buffered.end(i));
+      if (bufferedIndex === -1 && pos >= start && pos <= end) {
+        bufferedIndex = i;
+      }
+      if (pos + maxHoleDuration >= start && pos < end) {
+        // play position is inside this buffer TimeRange, retrieve end of buffer position and buffer length
+        bufferStart = start;
+        bufferEnd = end;
+        bufferLen = bufferEnd - pos;
+      } else if (pos + maxHoleDuration < start) {
+        nextStart = start;
+        break;
+      }
+    }
+    return {
+      len: bufferLen,
+      start: bufferStart || 0,
+      end: bufferEnd || 0,
+      nextStart,
+      buffered,
+      bufferedIndex
+    };
+  }
+
+  /**
+   * Safe method to get buffered property.
+   * SourceBuffer.buffered may throw if SourceBuffer is removed from it's MediaSource
+   */
+  static getBuffered(media) {
+    try {
+      return media.buffered || noopBuffered;
+    } catch (e) {
+      logger.log('failed to get media.buffered', e);
+      return noopBuffered;
+    }
+  }
+}
+
+const VARIABLE_REPLACEMENT_REGEX = /\{\$([a-zA-Z0-9-_]+)\}/g;
+function hasVariableReferences(str) {
+  return VARIABLE_REPLACEMENT_REGEX.test(str);
+}
+function substituteVariables(parsed, value) {
+  if (parsed.variableList !== null || parsed.hasVariableRefs) {
+    const variableList = parsed.variableList;
+    return value.replace(VARIABLE_REPLACEMENT_REGEX, variableReference => {
+      const variableName = variableReference.substring(2, variableReference.length - 1);
+      const variableValue = variableList == null ? void 0 : variableList[variableName];
+      if (variableValue === undefined) {
+        parsed.playlistParsingError || (parsed.playlistParsingError = new Error(`Missing preceding EXT-X-DEFINE tag for Variable Reference: "${variableName}"`));
+        return variableReference;
+      }
+      return variableValue;
+    });
+  }
+  return value;
+}
+function addVariableDefinition(parsed, attr, parentUrl) {
+  let variableList = parsed.variableList;
+  if (!variableList) {
+    parsed.variableList = variableList = {};
+  }
+  let NAME;
+  let VALUE;
+  if ('QUERYPARAM' in attr) {
+    NAME = attr.QUERYPARAM;
+    try {
+      const searchParams = new self.URL(parentUrl).searchParams;
+      if (searchParams.has(NAME)) {
+        VALUE = searchParams.get(NAME);
+      } else {
+        throw new Error(`"${NAME}" does not match any query parameter in URI: "${parentUrl}"`);
+      }
+    } catch (error) {
+      parsed.playlistParsingError || (parsed.playlistParsingError = new Error(`EXT-X-DEFINE QUERYPARAM: ${error.message}`));
+    }
+  } else {
+    NAME = attr.NAME;
+    VALUE = attr.VALUE;
+  }
+  if (NAME in variableList) {
+    parsed.playlistParsingError || (parsed.playlistParsingError = new Error(`EXT-X-DEFINE duplicate Variable Name declarations: "${NAME}"`));
+  } else {
+    variableList[NAME] = VALUE || '';
+  }
+}
+function importVariableDefinition(parsed, attr, sourceVariableList) {
+  const IMPORT = attr.IMPORT;
+  if (sourceVariableList && IMPORT in sourceVariableList) {
+    let variableList = parsed.variableList;
+    if (!variableList) {
+      parsed.variableList = variableList = {};
+    }
+    variableList[IMPORT] = sourceVariableList[IMPORT];
+  } else {
+    parsed.playlistParsingError || (parsed.playlistParsingError = new Error(`EXT-X-DEFINE IMPORT attribute not found in Multivariant Playlist: "${IMPORT}"`));
+  }
+}
+
+const DECIMAL_RESOLUTION_REGEX = /^(\d+)x(\d+)$/;
+const ATTR_LIST_REGEX = /(.+?)=(".*?"|.*?)(?:,|$)/g;
+
+// adapted from https://github.com/kanongil/node-m3u8parse/blob/master/attrlist.js
+class AttrList {
+  constructor(attrs, parsed) {
+    if (typeof attrs === 'string') {
+      attrs = AttrList.parseAttrList(attrs, parsed);
+    }
+    _extends(this, attrs);
+  }
+  get clientAttrs() {
+    return Object.keys(this).filter(attr => attr.substring(0, 2) === 'X-');
+  }
+  decimalInteger(attrName) {
+    const intValue = parseInt(this[attrName], 10);
+    if (intValue > Number.MAX_SAFE_INTEGER) {
+      return Infinity;
+    }
+    return intValue;
+  }
+  hexadecimalInteger(attrName) {
+    if (this[attrName]) {
+      let stringValue = (this[attrName] || '0x').slice(2);
+      stringValue = (stringValue.length & 1 ? '0' : '') + stringValue;
+      const value = new Uint8Array(stringValue.length / 2);
+      for (let i = 0; i < stringValue.length / 2; i++) {
+        value[i] = parseInt(stringValue.slice(i * 2, i * 2 + 2), 16);
+      }
+      return value;
+    }
+    return null;
+  }
+  hexadecimalIntegerAsNumber(attrName) {
+    const intValue = parseInt(this[attrName], 16);
+    if (intValue > Number.MAX_SAFE_INTEGER) {
+      return Infinity;
+    }
+    return intValue;
+  }
+  decimalFloatingPoint(attrName) {
+    return parseFloat(this[attrName]);
+  }
+  optionalFloat(attrName, defaultValue) {
+    const value = this[attrName];
+    return value ? parseFloat(value) : defaultValue;
+  }
+  enumeratedString(attrName) {
+    return this[attrName];
+  }
+  enumeratedStringList(attrName, dict) {
+    const attrValue = this[attrName];
+    return (attrValue ? attrValue.split(/[ ,]+/) : []).reduce((result, identifier) => {
+      result[identifier.toLowerCase()] = true;
+      return result;
+    }, dict);
+  }
+  bool(attrName) {
+    return this[attrName] === 'YES';
+  }
+  decimalResolution(attrName) {
+    const res = DECIMAL_RESOLUTION_REGEX.exec(this[attrName]);
+    if (res === null) {
+      return undefined;
+    }
+    return {
+      width: parseInt(res[1], 10),
+      height: parseInt(res[2], 10)
+    };
+  }
+  static parseAttrList(input, parsed) {
+    let match;
+    const attrs = {};
+    const quote = '"';
+    ATTR_LIST_REGEX.lastIndex = 0;
+    while ((match = ATTR_LIST_REGEX.exec(input)) !== null) {
+      const name = match[1].trim();
+      let value = match[2];
+      const quotedString = value.indexOf(quote) === 0 && value.lastIndexOf(quote) === value.length - 1;
+      let hexadecimalSequence = false;
+      if (quotedString) {
+        value = value.slice(1, -1);
+      } else {
+        switch (name) {
+          case 'IV':
+          case 'SCTE35-CMD':
+          case 'SCTE35-IN':
+          case 'SCTE35-OUT':
+            hexadecimalSequence = true;
+        }
+      }
+      if (parsed && (quotedString || hexadecimalSequence)) {
+        {
+          value = substituteVariables(parsed, value);
+        }
+      } else if (!hexadecimalSequence && !quotedString) {
+        switch (name) {
+          case 'CLOSED-CAPTIONS':
+            if (value === 'NONE') {
+              break;
+            }
+          // falls through
+          case 'ALLOWED-CPC':
+          case 'CLASS':
+          case 'ASSOC-LANGUAGE':
+          case 'AUDIO':
+          case 'BYTERANGE':
+          case 'CHANNELS':
+          case 'CHARACTERISTICS':
+          case 'CODECS':
+          case 'DATA-ID':
+          case 'END-DATE':
+          case 'GROUP-ID':
+          case 'ID':
+          case 'IMPORT':
+          case 'INSTREAM-ID':
+          case 'KEYFORMAT':
+          case 'KEYFORMATVERSIONS':
+          case 'LANGUAGE':
+          case 'NAME':
+          case 'PATHWAY-ID':
+          case 'QUERYPARAM':
+          case 'RECENTLY-REMOVED-DATERANGES':
+          case 'SERVER-URI':
+          case 'STABLE-RENDITION-ID':
+          case 'STABLE-VARIANT-ID':
+          case 'START-DATE':
+          case 'SUBTITLES':
+          case 'SUPPLEMENTAL-CODECS':
+          case 'URI':
+          case 'VALUE':
+          case 'VIDEO':
+          case 'X-ASSET-LIST':
+          case 'X-ASSET-URI':
+            // Since we are not checking tag:attribute combination, just warn rather than ignoring attribute
+            logger.warn(`${input}: attribute ${name} is missing quotes`);
+          // continue;
+        }
+      }
+      attrs[name] = value;
+    }
+    return attrs;
+  }
+}
+
+// Avoid exporting const enum so that these values can be inlined
+
+const CLASS_INTERSTITIAL = 'com.apple.hls.interstitial';
+function isDateRangeCueAttribute(attrName) {
+  return attrName !== "ID" && attrName !== "CLASS" && attrName !== "CUE" && attrName !== "START-DATE" && attrName !== "DURATION" && attrName !== "END-DATE" && attrName !== "END-ON-NEXT";
+}
+function isSCTE35Attribute(attrName) {
+  return attrName === "SCTE35-OUT" || attrName === "SCTE35-IN" || attrName === "SCTE35-CMD";
+}
+class DateRange {
+  constructor(dateRangeAttr, dateRangeWithSameId, tagCount = 0) {
+    var _dateRangeWithSameId$;
+    this.attr = void 0;
+    this.tagAnchor = void 0;
+    this.tagOrder = void 0;
+    this._startDate = void 0;
+    this._endDate = void 0;
+    this._dateAtEnd = void 0;
+    this._cue = void 0;
+    this._badValueForSameId = void 0;
+    this.tagAnchor = (dateRangeWithSameId == null ? void 0 : dateRangeWithSameId.tagAnchor) || null;
+    this.tagOrder = (_dateRangeWithSameId$ = dateRangeWithSameId == null ? void 0 : dateRangeWithSameId.tagOrder) != null ? _dateRangeWithSameId$ : tagCount;
+    if (dateRangeWithSameId) {
+      const previousAttr = dateRangeWithSameId.attr;
+      for (const key in previousAttr) {
+        if (Object.prototype.hasOwnProperty.call(dateRangeAttr, key) && dateRangeAttr[key] !== previousAttr[key]) {
+          logger.warn(`DATERANGE tag attribute: "${key}" does not match for tags with ID: "${dateRangeAttr.ID}"`);
+          this._badValueForSameId = key;
+          break;
+        }
+      }
+      // Merge DateRange tags with the same ID
+      dateRangeAttr = _extends(new AttrList({}), previousAttr, dateRangeAttr);
+    }
+    this.attr = dateRangeAttr;
+    if (dateRangeWithSameId) {
+      this._startDate = dateRangeWithSameId._startDate;
+      this._cue = dateRangeWithSameId._cue;
+      this._endDate = dateRangeWithSameId._endDate;
+      this._dateAtEnd = dateRangeWithSameId._dateAtEnd;
+    } else {
+      this._startDate = new Date(dateRangeAttr["START-DATE"]);
+    }
+    if ("END-DATE" in this.attr) {
+      const endDate = (dateRangeWithSameId == null ? void 0 : dateRangeWithSameId.endDate) || new Date(this.attr["END-DATE"]);
+      if (isFiniteNumber(endDate.getTime())) {
+        this._endDate = endDate;
+      }
+    }
+  }
+  get id() {
+    return this.attr.ID;
+  }
+  get class() {
+    return this.attr.CLASS;
+  }
+  get cue() {
+    const _cue = this._cue;
+    if (_cue === undefined) {
+      return this._cue = this.attr.enumeratedStringList(this.attr.CUE ? 'CUE' : 'X-CUE', {
+        pre: false,
+        post: false,
+        once: false
+      });
+    }
+    return _cue;
+  }
+  get startTime() {
+    const {
+      tagAnchor
+    } = this;
+    // eslint-disable-next-line @typescript-eslint/prefer-optional-chain
+    if (tagAnchor === null || tagAnchor.programDateTime === null) {
+      logger.warn(`Expected tagAnchor Fragment with PDT set for DateRange "${this.id}": ${tagAnchor}`);
+      return NaN;
+    }
+    return tagAnchor.start + (this.startDate.getTime() - tagAnchor.programDateTime) / 1000;
+  }
+  get startDate() {
+    return this._startDate;
+  }
+  get endDate() {
+    const dateAtEnd = this._endDate || this._dateAtEnd;
+    if (dateAtEnd) {
+      return dateAtEnd;
+    }
+    const duration = this.duration;
+    if (duration !== null) {
+      return this._dateAtEnd = new Date(this._startDate.getTime() + duration * 1000);
+    }
+    return null;
+  }
+  get duration() {
+    if ("DURATION" in this.attr) {
+      const duration = this.attr.decimalFloatingPoint("DURATION");
+      if (isFiniteNumber(duration)) {
+        return duration;
+      }
+    } else if (this._endDate) {
+      return (this._endDate.getTime() - this._startDate.getTime()) / 1000;
+    }
+    return null;
+  }
+  get plannedDuration() {
+    if ("PLANNED-DURATION" in this.attr) {
+      return this.attr.decimalFloatingPoint("PLANNED-DURATION");
+    }
+    return null;
+  }
+  get endOnNext() {
+    return this.attr.bool("END-ON-NEXT");
+  }
+  get isInterstitial() {
+    return this.class === CLASS_INTERSTITIAL;
+  }
+  get isValid() {
+    return !!this.id && !this._badValueForSameId && isFiniteNumber(this.startDate.getTime()) && (this.duration === null || this.duration >= 0) && (!this.endOnNext || !!this.class) && (!this.attr.CUE || !this.cue.pre && !this.cue.post || this.cue.pre !== this.cue.post) && (!this.isInterstitial || 'X-ASSET-URI' in this.attr || 'X-ASSET-LIST' in this.attr);
+  }
+}
+
+const DEFAULT_TARGET_DURATION = 10;
+
+/**
+ * Object representing parsed data from an HLS Media Playlist. Found in {@link hls.js#Level.details}.
+ */
+class LevelDetails {
+  constructor(baseUrl) {
+    this.PTSKnown = false;
+    this.alignedSliding = false;
+    this.averagetargetduration = void 0;
+    this.endCC = 0;
+    this.endSN = 0;
+    this.fragments = void 0;
+    this.fragmentHint = void 0;
+    this.partList = null;
+    this.dateRanges = void 0;
+    this.dateRangeTagCount = 0;
+    this.live = true;
+    this.requestScheduled = -1;
+    this.ageHeader = 0;
+    this.advancedDateTime = void 0;
+    this.updated = true;
+    this.advanced = true;
+    this.misses = 0;
+    this.startCC = 0;
+    this.startSN = 0;
+    this.startTimeOffset = null;
+    this.targetduration = 0;
+    this.totalduration = 0;
+    this.type = null;
+    this.url = void 0;
+    this.m3u8 = '';
+    this.version = null;
+    this.canBlockReload = false;
+    this.canSkipUntil = 0;
+    this.canSkipDateRanges = false;
+    this.skippedSegments = 0;
+    this.recentlyRemovedDateranges = void 0;
+    this.partHoldBack = 0;
+    this.holdBack = 0;
+    this.partTarget = 0;
+    this.preloadHint = void 0;
+    this.renditionReports = void 0;
+    this.tuneInGoal = 0;
+    this.deltaUpdateFailed = void 0;
+    this.driftStartTime = 0;
+    this.driftEndTime = 0;
+    this.driftStart = 0;
+    this.driftEnd = 0;
+    this.encryptedFragments = void 0;
+    this.playlistParsingError = null;
+    this.variableList = null;
+    this.hasVariableRefs = false;
+    this.appliedTimelineOffset = void 0;
+    this.fragments = [];
+    this.encryptedFragments = [];
+    this.dateRanges = {};
+    this.url = baseUrl;
+  }
+  reloaded(previous) {
+    if (!previous) {
+      this.advanced = true;
+      this.updated = true;
+      return;
+    }
+    const partSnDiff = this.lastPartSn - previous.lastPartSn;
+    const partIndexDiff = this.lastPartIndex - previous.lastPartIndex;
+    this.updated = this.endSN !== previous.endSN || !!partIndexDiff || !!partSnDiff || !this.live;
+    this.advanced = this.endSN > previous.endSN || partSnDiff > 0 || partSnDiff === 0 && partIndexDiff > 0;
+    if (this.updated || this.advanced) {
+      this.misses = Math.floor(previous.misses * 0.6);
+    } else {
+      this.misses = previous.misses + 1;
+    }
+  }
+  hasKey(levelKey) {
+    return this.encryptedFragments.some(frag => {
+      let decryptdata = frag.decryptdata;
+      if (!decryptdata) {
+        frag.setKeyFormat(levelKey.keyFormat);
+        decryptdata = frag.decryptdata;
+      }
+      return !!decryptdata && levelKey.matches(decryptdata);
+    });
+  }
+  get hasProgramDateTime() {
+    if (this.fragments.length) {
+      return isFiniteNumber(this.fragments[this.fragments.length - 1].programDateTime);
+    }
+    return false;
+  }
+  get levelTargetDuration() {
+    return this.averagetargetduration || this.targetduration || DEFAULT_TARGET_DURATION;
+  }
+  get drift() {
+    const runTime = this.driftEndTime - this.driftStartTime;
+    if (runTime > 0) {
+      const runDuration = this.driftEnd - this.driftStart;
+      return runDuration * 1000 / runTime;
+    }
+    return 1;
+  }
+  get edge() {
+    return this.partEnd || this.fragmentEnd;
+  }
+  get partEnd() {
+    var _this$partList;
+    if ((_this$partList = this.partList) != null && _this$partList.length) {
+      return this.partList[this.partList.length - 1].end;
+    }
+    return this.fragmentEnd;
+  }
+  get fragmentEnd() {
+    if (this.fragments.length) {
+      return this.fragments[this.fragments.length - 1].end;
+    }
+    return 0;
+  }
+  get fragmentStart() {
+    if (this.fragments.length) {
+      return this.fragments[0].start;
+    }
+    return 0;
+  }
+  get age() {
+    if (this.advancedDateTime) {
+      return Math.max(Date.now() - this.advancedDateTime, 0) / 1000;
+    }
+    return 0;
+  }
+  get lastPartIndex() {
+    var _this$partList2;
+    if ((_this$partList2 = this.partList) != null && _this$partList2.length) {
+      return this.partList[this.partList.length - 1].index;
+    }
+    return -1;
+  }
+  get maxPartIndex() {
+    const partList = this.partList;
+    if (partList) {
+      const lastIndex = this.lastPartIndex;
+      if (lastIndex !== -1) {
+        for (let i = partList.length; i--;) {
+          if (partList[i].index > lastIndex) {
+            return partList[i].index;
+          }
+        }
+        return lastIndex;
+      }
+    }
+    return 0;
+  }
+  get lastPartSn() {
+    var _this$partList3;
+    if ((_this$partList3 = this.partList) != null && _this$partList3.length) {
+      return this.partList[this.partList.length - 1].fragment.sn;
+    }
+    return this.endSN;
+  }
+  get expired() {
+    if (this.live && this.age && this.misses < 3) {
+      const playlistWindowDuration = this.partEnd - this.fragmentStart;
+      return this.age > Math.max(playlistWindowDuration, this.totalduration) + this.levelTargetDuration;
+    }
+    return false;
+  }
+}
+
+function arrayValuesMatch(a, b) {
+  if (a.length === b.length) {
+    return !a.some((value, i) => value !== b[i]);
+  }
+  return false;
+}
+function optionalArrayValuesMatch(a, b) {
+  if (!a && !b) {
+    return true;
+  }
+  if (!a || !b) {
+    return false;
+  }
+  return arrayValuesMatch(a, b);
+}
+
+function isFullSegmentEncryption(method) {
+  return method === 'AES-128' || method === 'AES-256' || method === 'AES-256-CTR';
+}
+function getAesModeFromFullSegmentMethod(method) {
+  switch (method) {
+    case 'AES-128':
+    case 'AES-256':
+      return DecrypterAesMode.cbc;
+    case 'AES-256-CTR':
+      return DecrypterAesMode.ctr;
+    default:
+      throw new Error(`invalid full segment method ${method}`);
+  }
+}
+
+function base64Decode(base64encodedStr) {
+  return Uint8Array.from(atob(base64encodedStr), c => c.charCodeAt(0));
+}
+
+// breaking up those two types in order to clarify what is happening in the decoding path.
+
+// http://stackoverflow.com/questions/8936984/uint8array-to-string-in-javascript/22373197
+// http://www.onicos.com/staff/iz/amuse/javascript/expert/utf.txt
+/* utf.js - UTF-8 <=> UTF-16 convertion
+ *
+ * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
+ * Version: 1.0
+ * LastModified: Dec 25 1999
+ * This library is free.  You can redistribute it and/or modify it.
+ */
+
+function strToUtf8array(str) {
+  return Uint8Array.from(unescape(encodeURIComponent(str)), c => c.charCodeAt(0));
+}
+
+function getKeyIdBytes(str) {
+  const keyIdbytes = strToUtf8array(str).subarray(0, 16);
+  const paddedkeyIdbytes = new Uint8Array(16);
+  paddedkeyIdbytes.set(keyIdbytes, 16 - keyIdbytes.length);
+  return paddedkeyIdbytes;
+}
+function changeEndianness(keyId) {
+  const swap = function swap(array, from, to) {
+    const cur = array[from];
+    array[from] = array[to];
+    array[to] = cur;
+  };
+  swap(keyId, 0, 3);
+  swap(keyId, 1, 2);
+  swap(keyId, 4, 5);
+  swap(keyId, 6, 7);
+}
+function convertDataUriToArrayBytes(uri) {
+  // data:[<media type][;attribute=value][;base64],<data>
+  const colonsplit = uri.split(':');
+  let keydata = null;
+  if (colonsplit[0] === 'data' && colonsplit.length === 2) {
+    const semicolonsplit = colonsplit[1].split(';');
+    const commasplit = semicolonsplit[semicolonsplit.length - 1].split(',');
+    if (commasplit.length === 2) {
+      const isbase64 = commasplit[0] === 'base64';
+      const data = commasplit[1];
+      if (isbase64) {
+        semicolonsplit.splice(-1, 1); // remove from processing
+        keydata = base64Decode(data);
+      } else {
+        keydata = getKeyIdBytes(data);
+      }
+    }
+  }
+  return keydata;
+}
+
+/** returns `undefined` is `self` is missing, e.g. in node */
+const optionalSelf = typeof self !== 'undefined' ? self : undefined;
+
+/**
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMediaKeySystemAccess
+ */
+var KeySystems = {
+  CLEARKEY: "org.w3.clearkey",
+  FAIRPLAY: "com.apple.fps",
+  PLAYREADY: "com.microsoft.playready",
+  WIDEVINE: "com.widevine.alpha"
+};
+
+// Playlist #EXT-X-KEY KEYFORMAT values
+var KeySystemFormats = {
+  CLEARKEY: "org.w3.clearkey",
+  FAIRPLAY: "com.apple.streamingkeydelivery",
+  PLAYREADY: "com.microsoft.playready",
+  WIDEVINE: "urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"
+};
+function keySystemFormatToKeySystemDomain(format) {
+  switch (format) {
+    case KeySystemFormats.FAIRPLAY:
+      return KeySystems.FAIRPLAY;
+    case KeySystemFormats.PLAYREADY:
+      return KeySystems.PLAYREADY;
+    case KeySystemFormats.WIDEVINE:
+      return KeySystems.WIDEVINE;
+    case KeySystemFormats.CLEARKEY:
+      return KeySystems.CLEARKEY;
+  }
+}
+function keySystemDomainToKeySystemFormat(keySystem) {
+  switch (keySystem) {
+    case KeySystems.FAIRPLAY:
+      return KeySystemFormats.FAIRPLAY;
+    case KeySystems.PLAYREADY:
+      return KeySystemFormats.PLAYREADY;
+    case KeySystems.WIDEVINE:
+      return KeySystemFormats.WIDEVINE;
+    case KeySystems.CLEARKEY:
+      return KeySystemFormats.CLEARKEY;
+  }
+}
+function getKeySystemsForConfig(config) {
+  const {
+    drmSystems,
+    widevineLicenseUrl
+  } = config;
+  const keySystemsToAttempt = drmSystems ? [KeySystems.FAIRPLAY, KeySystems.WIDEVINE, KeySystems.PLAYREADY, KeySystems.CLEARKEY].filter(keySystem => !!drmSystems[keySystem]) : [];
+  if (!keySystemsToAttempt[KeySystems.WIDEVINE] && widevineLicenseUrl) {
+    keySystemsToAttempt.push(KeySystems.WIDEVINE);
+  }
+  return keySystemsToAttempt;
+}
+const requestMediaKeySystemAccess = function (_optionalSelf$navigat) {
+  if (optionalSelf != null && (_optionalSelf$navigat = optionalSelf.navigator) != null && _optionalSelf$navigat.requestMediaKeySystemAccess) {
+    return self.navigator.requestMediaKeySystemAccess.bind(self.navigator);
+  } else {
+    return null;
+  }
+}();
+
+/**
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/MediaKeySystemConfiguration
+ */
+function getSupportedMediaKeySystemConfigurations(keySystem, audioCodecs, videoCodecs, drmSystemOptions) {
+  let initDataTypes;
+  switch (keySystem) {
+    case KeySystems.FAIRPLAY:
+      initDataTypes = ['cenc', 'sinf'];
+      break;
+    case KeySystems.WIDEVINE:
+    case KeySystems.PLAYREADY:
+      initDataTypes = ['cenc'];
+      break;
+    case KeySystems.CLEARKEY:
+      initDataTypes = ['cenc', 'keyids'];
+      break;
+    default:
+      throw new Error(`Unknown key-system: ${keySystem}`);
+  }
+  return createMediaKeySystemConfigurations(initDataTypes, audioCodecs, videoCodecs, drmSystemOptions);
+}
+function createMediaKeySystemConfigurations(initDataTypes, audioCodecs, videoCodecs, drmSystemOptions) {
+  const baseConfig = {
+    initDataTypes: initDataTypes,
+    persistentState: drmSystemOptions.persistentState || 'optional',
+    distinctiveIdentifier: drmSystemOptions.distinctiveIdentifier || 'optional',
+    sessionTypes: drmSystemOptions.sessionTypes || [drmSystemOptions.sessionType || 'temporary'],
+    audioCapabilities: audioCodecs.map(codec => ({
+      contentType: `audio/mp4; codecs=${codec}`,
+      robustness: drmSystemOptions.audioRobustness || '',
+      encryptionScheme: drmSystemOptions.audioEncryptionScheme || null
+    })),
+    videoCapabilities: videoCodecs.map(codec => ({
+      contentType: `video/mp4; codecs=${codec}`,
+      robustness: drmSystemOptions.videoRobustness || '',
+      encryptionScheme: drmSystemOptions.videoEncryptionScheme || null
+    }))
+  };
+  return [baseConfig];
+}
+function isPersistentSessionType(drmSystemOptions) {
+  var _drmSystemOptions$ses;
+  return !!drmSystemOptions && (drmSystemOptions.sessionType === 'persistent-license' || !!((_drmSystemOptions$ses = drmSystemOptions.sessionTypes) != null && _drmSystemOptions$ses.some(type => type === 'persistent-license')));
+}
+function parsePlayReadyWRM(keyBytes) {
+  const keyBytesUtf16 = new Uint16Array(keyBytes.buffer, keyBytes.byteOffset, keyBytes.byteLength / 2);
+  const keyByteStr = String.fromCharCode.apply(null, Array.from(keyBytesUtf16));
+
+  // Parse Playready WRMHeader XML
+  const xmlKeyBytes = keyByteStr.substring(keyByteStr.indexOf('<'), keyByteStr.length);
+  const parser = new DOMParser();
+  const xmlDoc = parser.parseFromString(xmlKeyBytes, 'text/xml');
+  const keyData = xmlDoc.getElementsByTagName('KID')[0];
+  if (keyData) {
+    const keyId = keyData.childNodes[0] ? keyData.childNodes[0].nodeValue : keyData.getAttribute('VALUE');
+    if (keyId) {
+      const keyIdArray = base64Decode(keyId).subarray(0, 16);
+      // KID value in PRO is a base64-encoded little endian GUID interpretation of UUID
+      // KID value in ‘tenc’ is a big endian UUID GUID interpretation of UUID
+      changeEndianness(keyIdArray);
+      return keyIdArray;
+    }
+  }
+  return null;
+}
+
+let keyUriToKeyIdMap = {};
+class LevelKey {
+  static clearKeyUriToKeyIdMap() {
+    keyUriToKeyIdMap = {};
+  }
+  static setKeyIdForUri(uri, keyId) {
+    keyUriToKeyIdMap[uri] = keyId;
+  }
+  static addKeyIdForUri(uri) {
+    const val = Object.keys(keyUriToKeyIdMap).length % Number.MAX_SAFE_INTEGER;
+    const keyId = new Uint8Array(16);
+    const dv = new DataView(keyId.buffer, 12, 4); // Just set the last 4 bytes
+    dv.setUint32(0, val);
+    keyUriToKeyIdMap[uri] = keyId;
+    return keyId;
+  }
+  constructor(method, uri, format, formatversions = [1], iv = null, keyId) {
+    this.uri = void 0;
+    this.method = void 0;
+    this.keyFormat = void 0;
+    this.keyFormatVersions = void 0;
+    this.encrypted = void 0;
+    this.isCommonEncryption = void 0;
+    this.iv = null;
+    this.key = null;
+    this.keyId = null;
+    this.pssh = null;
+    this.method = method;
+    this.uri = uri;
+    this.keyFormat = format;
+    this.keyFormatVersions = formatversions;
+    this.iv = iv;
+    this.encrypted = method ? method !== 'NONE' : false;
+    this.isCommonEncryption = this.encrypted && !isFullSegmentEncryption(method);
+    if (keyId != null && keyId.startsWith('0x')) {
+      this.keyId = new Uint8Array(hexToArrayBuffer(keyId));
+    }
+  }
+  matches(key) {
+    return key.uri === this.uri && key.method === this.method && key.encrypted === this.encrypted && key.keyFormat === this.keyFormat && arrayValuesMatch(key.keyFormatVersions, this.keyFormatVersions) && optionalArrayValuesMatch(key.iv, this.iv) && optionalArrayValuesMatch(key.keyId, this.keyId);
+  }
+  isSupported() {
+    // If it's Segment encryption or No encryption, just select that key system
+    if (this.method) {
+      if (isFullSegmentEncryption(this.method) || this.method === 'NONE') {
+        return true;
+      }
+      if (this.keyFormat === 'identity') {
+        // Maintain support for clear SAMPLE-AES with MPEG-3 TS
+        return this.method === 'SAMPLE-AES';
+      } else {
+        switch (this.keyFormat) {
+          case KeySystemFormats.FAIRPLAY:
+          case KeySystemFormats.WIDEVINE:
+          case KeySystemFormats.PLAYREADY:
+          case KeySystemFormats.CLEARKEY:
+            return ['SAMPLE-AES', 'SAMPLE-AES-CENC', 'SAMPLE-AES-CTR'].indexOf(this.method) !== -1;
+        }
+      }
+    }
+    return false;
+  }
+  getDecryptData(sn, levelKeys) {
+    if (!this.encrypted || !this.uri) {
+      return null;
+    }
+    if (isFullSegmentEncryption(this.method)) {
+      let iv = this.iv;
+      if (!iv) {
+        if (typeof sn !== 'number') {
+          // We are fetching decryption data for a initialization segment
+          // If the segment was encrypted with AES-128/256
+          // It must have an IV defined. We cannot substitute the Segment Number in.
+          logger.warn(`missing IV for initialization segment with method="${this.method}" - compliance issue`);
+
+          // Explicitly set sn to resulting value from implicit conversions 'initSegment' values for IV generation.
+          sn = 0;
+        }
+        iv = createInitializationVector(sn);
+      }
+      const decryptdata = new LevelKey(this.method, this.uri, 'identity', this.keyFormatVersions, iv);
+      return decryptdata;
+    }
+    if (this.keyId) {
+      // Handle case where key id is changed in KEY_LOADING event handler #7542#issuecomment-3305203929
+      const assignedKeyId = keyUriToKeyIdMap[this.uri];
+      if (assignedKeyId && !arrayValuesMatch(this.keyId, assignedKeyId)) {
+        LevelKey.setKeyIdForUri(this.uri, this.keyId);
+      }
+      if (this.pssh) {
+        return this;
+      }
+    }
+
+    // Key bytes are signalled the KEYID attribute, typically only found on WideVine KEY tags
+    // Initialize keyId if possible
+    const keyBytes = convertDataUriToArrayBytes(this.uri);
+    if (keyBytes) {
+      switch (this.keyFormat) {
+        case KeySystemFormats.WIDEVINE:
+          // Setting `pssh` on this LevelKey/DecryptData allows HLS.js to generate a session using
+          // the playlist-key before the "encrypted" event. (Comment out to only use "encrypted" path.)
+          this.pssh = keyBytes;
+          // In case of Widevine, if KEYID is not in the playlist, assume only two fields in the pssh KEY tag URI.
+          if (!this.keyId) {
+            const results = parseMultiPssh(keyBytes.buffer);
+            if (results.length) {
+              var _psshData$kids;
+              const psshData = results[0];
+              this.keyId = (_psshData$kids = psshData.kids) != null && _psshData$kids.length ? psshData.kids[0] : null;
+            }
+          }
+          if (!this.keyId) {
+            this.keyId = getKeyIdFromPlayReadyKey(levelKeys);
+          }
+          break;
+        case KeySystemFormats.PLAYREADY:
+          {
+            const PlayReadyKeySystemUUID = new Uint8Array([0x9a, 0x04, 0xf0, 0x79, 0x98, 0x40, 0x42, 0x86, 0xab, 0x92, 0xe6, 0x5b, 0xe0, 0x88, 0x5f, 0x95]);
+
+            // Setting `pssh` on this LevelKey/DecryptData allows HLS.js to generate a session using
+            // the playlist-key before the "encrypted" event. (Comment out to only use "encrypted" path.)
+            this.pssh = mp4pssh(PlayReadyKeySystemUUID, null, keyBytes);
+            this.keyId = parsePlayReadyWRM(keyBytes);
+            break;
+          }
+        default:
+          {
+            let keydata = keyBytes.subarray(0, 16);
+            if (keydata.length !== 16) {
+              const padded = new Uint8Array(16);
+              padded.set(keydata, 16 - keydata.length);
+              keydata = padded;
+            }
+            this.keyId = keydata;
+            break;
+          }
+      }
+    }
+
+    // Default behavior: get keyId from other KEY tag or URI lookup
+    if (!this.keyId || this.keyId.byteLength !== 16) {
+      let keyId;
+      keyId = getKeyIdFromWidevineKey(levelKeys);
+      if (!keyId) {
+        keyId = getKeyIdFromPlayReadyKey(levelKeys);
+        if (!keyId) {
+          keyId = keyUriToKeyIdMap[this.uri];
+        }
+      }
+      if (keyId) {
+        this.keyId = keyId;
+        LevelKey.setKeyIdForUri(this.uri, keyId);
+      }
+    }
+    return this;
+  }
+}
+function getKeyIdFromWidevineKey(levelKeys) {
+  const widevineKey = levelKeys == null ? void 0 : levelKeys[KeySystemFormats.WIDEVINE];
+  if (widevineKey) {
+    return widevineKey.keyId;
+  }
+  return null;
+}
+function getKeyIdFromPlayReadyKey(levelKeys) {
+  const playReadyKey = levelKeys == null ? void 0 : levelKeys[KeySystemFormats.PLAYREADY];
+  if (playReadyKey) {
+    const playReadyKeyBytes = convertDataUriToArrayBytes(playReadyKey.uri);
+    if (playReadyKeyBytes) {
+      return parsePlayReadyWRM(playReadyKeyBytes);
+    }
+  }
+  return null;
+}
+function createInitializationVector(segmentNumber) {
+  const uint8View = new Uint8Array(16);
+  for (let i = 12; i < 16; i++) {
+    uint8View[i] = segmentNumber >> 8 * (15 - i) & 0xff;
+  }
+  return uint8View;
+}
+
+const MASTER_PLAYLIST_REGEX = /#EXT-X-STREAM-INF:([^\r\n]*)(?:[\r\n](?:#[^\r\n]*)?)*([^\r\n]+)|#EXT-X-(SESSION-DATA|SESSION-KEY|DEFINE|CONTENT-STEERING|START):([^\r\n]*)[\r\n]+/g;
+const MASTER_PLAYLIST_MEDIA_REGEX = /#EXT-X-MEDIA:(.*)/g;
+const IS_MEDIA_PLAYLIST = /^#EXT(?:INF|-X-TARGETDURATION):/m; // Handle empty Media Playlist (first EXTINF not signaled, but TARGETDURATION present)
+
+const LEVEL_PLAYLIST_REGEX_FAST = new RegExp([/#EXTINF:\s*(\d*(?:\.\d+)?)(?:,(.*)\s+)?/.source,
+// duration (#EXTINF:<duration>,<title>), group 1 => duration, group 2 => title
+/(?!#) *(\S[^\r\n]*)/.source,
+// segment URI, group 3 => the URI (note newline is not eaten)
+/#.*/.source // All other non-segment oriented tags will match with all groups empty
+].join('|'), 'g');
+const LEVEL_PLAYLIST_REGEX_SLOW = new RegExp([/#EXT-X-(PROGRAM-DATE-TIME|BYTERANGE|DATERANGE|DEFINE|KEY|MAP|PART|PART-INF|PLAYLIST-TYPE|PRELOAD-HINT|RENDITION-REPORT|SERVER-CONTROL|SKIP|START):(.+)/.source, /#EXT-X-(BITRATE|DISCONTINUITY-SEQUENCE|MEDIA-SEQUENCE|TARGETDURATION|VERSION): *(\d+)/.source, /#EXT-X-(DISCONTINUITY|ENDLIST|GAP|INDEPENDENT-SEGMENTS)/.source, /(#)([^:]*):(.*)/.source, /(#)(.*)(?:.*)\r?\n?/.source].join('|'));
+class M3U8Parser {
+  static findGroup(groups, mediaGroupId) {
+    for (let i = 0; i < groups.length; i++) {
+      const group = groups[i];
+      if (group.id === mediaGroupId) {
+        return group;
+      }
+    }
+  }
+  static resolve(url, baseUrl) {
+    return urlToolkitExports.buildAbsoluteURL(baseUrl, url, {
+      alwaysNormalize: true
+    });
+  }
+  static isMediaPlaylist(str) {
+    return IS_MEDIA_PLAYLIST.test(str);
+  }
+  static parseMasterPlaylist(string, baseurl) {
+    const hasVariableRefs = hasVariableReferences(string) ;
+    const parsed = {
+      contentSteering: null,
+      levels: [],
+      playlistParsingError: null,
+      sessionData: null,
+      sessionKeys: null,
+      startTimeOffset: null,
+      variableList: null,
+      hasVariableRefs
+    };
+    const levelsWithKnownCodecs = [];
+    MASTER_PLAYLIST_REGEX.lastIndex = 0;
+    if (!string.startsWith('#EXTM3U')) {
+      parsed.playlistParsingError = new Error('no EXTM3U delimiter');
+      return parsed;
+    }
+    let result;
+    while ((result = MASTER_PLAYLIST_REGEX.exec(string)) != null) {
+      if (result[1]) {
+        var _level$unknownCodecs;
+        // '#EXT-X-STREAM-INF' is found, parse level tag  in group 1
+        const attrs = new AttrList(result[1], parsed);
+        const uri = substituteVariables(parsed, result[2]) ;
+        const level = {
+          attrs,
+          bitrate: attrs.decimalInteger('BANDWIDTH') || attrs.decimalInteger('AVERAGE-BANDWIDTH'),
+          name: attrs.NAME,
+          url: M3U8Parser.resolve(uri, baseurl)
+        };
+        const resolution = attrs.decimalResolution('RESOLUTION');
+        if (resolution) {
+          level.width = resolution.width;
+          level.height = resolution.height;
+        }
+        setCodecs(attrs.CODECS, level);
+        const supplementalCodecs = attrs['SUPPLEMENTAL-CODECS'];
+        if (supplementalCodecs) {
+          level.supplemental = {};
+          setCodecs(supplementalCodecs, level.supplemental);
+        }
+        if (!((_level$unknownCodecs = level.unknownCodecs) != null && _level$unknownCodecs.length)) {
+          levelsWithKnownCodecs.push(level);
+        }
+        parsed.levels.push(level);
+      } else if (result[3]) {
+        const tag = result[3];
+        const attributes = result[4];
+        switch (tag) {
+          case 'SESSION-DATA':
+            {
+              // #EXT-X-SESSION-DATA
+              const sessionAttrs = new AttrList(attributes, parsed);
+              const dataId = sessionAttrs['DATA-ID'];
+              if (dataId) {
+                if (parsed.sessionData === null) {
+                  parsed.sessionData = {};
+                }
+                parsed.sessionData[dataId] = sessionAttrs;
+              }
+              break;
+            }
+          case 'SESSION-KEY':
+            {
+              // #EXT-X-SESSION-KEY
+              const sessionKey = parseKey(attributes, baseurl, parsed);
+              if (sessionKey.encrypted && sessionKey.isSupported()) {
+                if (parsed.sessionKeys === null) {
+                  parsed.sessionKeys = [];
+                }
+                parsed.sessionKeys.push(sessionKey);
+              } else {
+                logger.warn(`[Keys] Ignoring invalid EXT-X-SESSION-KEY tag: "${attributes}"`);
+              }
+              break;
+            }
+          case 'DEFINE':
+            {
+              // #EXT-X-DEFINE
+              {
+                const variableAttributes = new AttrList(attributes, parsed);
+                addVariableDefinition(parsed, variableAttributes, baseurl);
+              }
+              break;
+            }
+          case 'CONTENT-STEERING':
+            {
+              // #EXT-X-CONTENT-STEERING
+              const contentSteeringAttributes = new AttrList(attributes, parsed);
+              parsed.contentSteering = {
+                uri: M3U8Parser.resolve(contentSteeringAttributes['SERVER-URI'], baseurl),
+                pathwayId: contentSteeringAttributes['PATHWAY-ID'] || '.'
+              };
+              break;
+            }
+          case 'START':
+            {
+              // #EXT-X-START
+              parsed.startTimeOffset = parseStartTimeOffset(attributes);
+              break;
+            }
+        }
+      }
+    }
+    // Filter out levels with unknown codecs if it does not remove all levels
+    const stripUnknownCodecLevels = levelsWithKnownCodecs.length > 0 && levelsWithKnownCodecs.length < parsed.levels.length;
+    parsed.levels = stripUnknownCodecLevels ? levelsWithKnownCodecs : parsed.levels;
+    if (parsed.levels.length === 0) {
+      parsed.playlistParsingError = new Error('no levels found in manifest');
+    }
+    return parsed;
+  }
+  static parseMasterPlaylistMedia(string, baseurl, parsed) {
+    let result;
+    const results = {};
+    const levels = parsed.levels;
+    const groupsByType = {
+      AUDIO: levels.map(level => ({
+        id: level.attrs.AUDIO,
+        audioCodec: level.audioCodec
+      })),
+      SUBTITLES: levels.map(level => ({
+        id: level.attrs.SUBTITLES,
+        textCodec: level.textCodec
+      })),
+      'CLOSED-CAPTIONS': []
+    };
+    let id = 0;
+    MASTER_PLAYLIST_MEDIA_REGEX.lastIndex = 0;
+    while ((result = MASTER_PLAYLIST_MEDIA_REGEX.exec(string)) !== null) {
+      const attrs = new AttrList(result[1], parsed);
+      const type = attrs.TYPE;
+      if (type) {
+        const groups = groupsByType[type];
+        const medias = results[type] || [];
+        results[type] = medias;
+        const lang = attrs.LANGUAGE;
+        const assocLang = attrs['ASSOC-LANGUAGE'];
+        const channels = attrs.CHANNELS;
+        const characteristics = attrs.CHARACTERISTICS;
+        const instreamId = attrs['INSTREAM-ID'];
+        const media = {
+          attrs,
+          bitrate: 0,
+          id: id++,
+          groupId: attrs['GROUP-ID'] || '',
+          name: attrs.NAME || lang || '',
+          type,
+          default: attrs.bool('DEFAULT'),
+          autoselect: attrs.bool('AUTOSELECT'),
+          forced: attrs.bool('FORCED'),
+          lang,
+          url: attrs.URI ? M3U8Parser.resolve(attrs.URI, baseurl) : ''
+        };
+        if (assocLang) {
+          media.assocLang = assocLang;
+        }
+        if (channels) {
+          media.channels = channels;
+        }
+        if (characteristics) {
+          media.characteristics = characteristics;
+        }
+        if (instreamId) {
+          media.instreamId = instreamId;
+        }
+        if (groups != null && groups.length) {
+          // If there are audio or text groups signalled in the manifest, let's look for a matching codec string for this track
+          // If we don't find the track signalled, lets use the first audio groups codec we have
+          // Acting as a best guess
+          const groupCodec = M3U8Parser.findGroup(groups, media.groupId) || groups[0];
+          assignCodec(media, groupCodec, 'audioCodec');
+          assignCodec(media, groupCodec, 'textCodec');
+        }
+        medias.push(media);
+      }
+    }
+    return results;
+  }
+  static parseLevelPlaylist(string, baseurl, id, type, levelUrlId, multivariantVariableList) {
+    var _LEVEL_PLAYLIST_REGEX;
+    const base = {
+      url: baseurl
+    };
+    const level = new LevelDetails(baseurl);
+    const fragments = level.fragments;
+    const programDateTimes = [];
+    // The most recent init segment seen (applies to all subsequent segments)
+    let currentInitSegment = null;
+    let currentSN = 0;
+    let currentPart = 0;
+    let totalduration = 0;
+    let discontinuityCounter = 0;
+    let currentBitrate = 0;
+    let prevFrag = null;
+    let frag = new Fragment(type, base);
+    let result;
+    let i;
+    let levelkeys;
+    let firstPdtIndex = -1;
+    let createNextFrag = false;
+    let nextByteRange = null;
+    let serverControlAttrs;
+    LEVEL_PLAYLIST_REGEX_FAST.lastIndex = 0;
+    level.m3u8 = string;
+    level.hasVariableRefs = hasVariableReferences(string) ;
+    if (((_LEVEL_PLAYLIST_REGEX = LEVEL_PLAYLIST_REGEX_FAST.exec(string)) == null ? void 0 : _LEVEL_PLAYLIST_REGEX[0]) !== '#EXTM3U') {
+      level.playlistParsingError = new Error('Missing format identifier #EXTM3U');
+      return level;
+    }
+    while ((result = LEVEL_PLAYLIST_REGEX_FAST.exec(string)) !== null) {
+      if (createNextFrag) {
+        createNextFrag = false;
+        frag = new Fragment(type, base);
+        // setup the next fragment for part loading
+        frag.playlistOffset = totalduration;
+        frag.setStart(totalduration);
+        frag.sn = currentSN;
+        frag.cc = discontinuityCounter;
+        if (currentBitrate) {
+          frag.bitrate = currentBitrate;
+        }
+        frag.level = id;
+        if (currentInitSegment) {
+          frag.initSegment = currentInitSegment;
+          if (currentInitSegment.rawProgramDateTime) {
+            frag.rawProgramDateTime = currentInitSegment.rawProgramDateTime;
+            currentInitSegment.rawProgramDateTime = null;
+          }
+          if (nextByteRange) {
+            frag.setByteRange(nextByteRange);
+            nextByteRange = null;
+          }
+        }
+      }
+      const duration = result[1];
+      if (duration) {
+        // INF
+        frag.duration = parseFloat(duration);
+        // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
+        const title = (' ' + result[2]).slice(1);
+        frag.title = title || null;
+        frag.tagList.push(title ? ['INF', duration, title] : ['INF', duration]);
+      } else if (result[3]) {
+        // url
+        if (isFiniteNumber(frag.duration)) {
+          frag.playlistOffset = totalduration;
+          frag.setStart(totalduration);
+          if (levelkeys) {
+            setFragLevelKeys(frag, levelkeys, level);
+          }
+          frag.sn = currentSN;
+          frag.level = id;
+          frag.cc = discontinuityCounter;
+          fragments.push(frag);
+          // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
+          const uri = (' ' + result[3]).slice(1);
+          frag.relurl = substituteVariables(level, uri) ;
+          assignProgramDateTime(frag, prevFrag, programDateTimes);
+          prevFrag = frag;
+          totalduration += frag.duration;
+          currentSN++;
+          currentPart = 0;
+          createNextFrag = true;
+        }
+      } else {
+        result = result[0].match(LEVEL_PLAYLIST_REGEX_SLOW);
+        if (!result) {
+          logger.warn('No matches on slow regex match for level playlist!');
+          continue;
+        }
+        for (i = 1; i < result.length; i++) {
+          if (result[i] !== undefined) {
+            break;
+          }
+        }
+
+        // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
+        const tag = (' ' + result[i]).slice(1);
+        const value1 = (' ' + result[i + 1]).slice(1);
+        const value2 = result[i + 2] ? (' ' + result[i + 2]).slice(1) : null;
+        switch (tag) {
+          case 'BYTERANGE':
+            if (prevFrag) {
+              frag.setByteRange(value1, prevFrag);
+            } else {
+              frag.setByteRange(value1);
+            }
+            break;
+          case 'PROGRAM-DATE-TIME':
+            // avoid sliced strings    https://github.com/video-dev/hls.js/issues/939
+            frag.rawProgramDateTime = value1;
+            frag.tagList.push(['PROGRAM-DATE-TIME', value1]);
+            if (firstPdtIndex === -1) {
+              firstPdtIndex = fragments.length;
+            }
+            break;
+          case 'PLAYLIST-TYPE':
+            if (level.type) {
+              assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+            }
+            level.type = value1.toUpperCase();
+            break;
+          case 'MEDIA-SEQUENCE':
+            if (level.startSN !== 0) {
+              assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+            } else if (fragments.length > 0) {
+              assignMustAppearBeforeSegmentsError(level, tag, result);
+            }
+            currentSN = level.startSN = parseInt(value1);
+            break;
+          case 'SKIP':
+            {
+              if (level.skippedSegments) {
+                assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+              }
+              const skipAttrs = new AttrList(value1, level);
+              const skippedSegments = skipAttrs.decimalInteger('SKIPPED-SEGMENTS');
+              if (isFiniteNumber(skippedSegments)) {
+                level.skippedSegments += skippedSegments;
+                // This will result in fragments[] containing undefined values, which we will fill in with `mergeDetails`
+                for (let _i = skippedSegments; _i--;) {
+                  fragments.push(null);
+                }
+                currentSN += skippedSegments;
+              }
+              const recentlyRemovedDateranges = skipAttrs.enumeratedString('RECENTLY-REMOVED-DATERANGES');
+              if (recentlyRemovedDateranges) {
+                level.recentlyRemovedDateranges = (level.recentlyRemovedDateranges || []).concat(recentlyRemovedDateranges.split('\t'));
+              }
+              break;
+            }
+          case 'TARGETDURATION':
+            if (level.targetduration !== 0) {
+              assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+            }
+            level.targetduration = Math.max(parseInt(value1), 1);
+            break;
+          case 'VERSION':
+            if (level.version !== null) {
+              assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+            }
+            level.version = parseInt(value1);
+            break;
+          case 'INDEPENDENT-SEGMENTS':
+            break;
+          case 'ENDLIST':
+            if (!level.live) {
+              assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+            }
+            level.live = false;
+            break;
+          case '#':
+            if (value1 || value2) {
+              frag.tagList.push(value2 ? [value1, value2] : [value1]);
+            }
+            break;
+          case 'DISCONTINUITY':
+            discontinuityCounter++;
+            frag.tagList.push(['DIS']);
+            break;
+          case 'GAP':
+            frag.gap = true;
+            frag.tagList.push([tag]);
+            break;
+          case 'BITRATE':
+            frag.tagList.push([tag, value1]);
+            currentBitrate = parseInt(value1) * 1000;
+            if (isFiniteNumber(currentBitrate)) {
+              frag.bitrate = currentBitrate;
+            } else {
+              currentBitrate = 0;
+            }
+            break;
+          case 'DATERANGE':
+            {
+              const dateRangeAttr = new AttrList(value1, level);
+              const dateRange = new DateRange(dateRangeAttr, level.dateRanges[dateRangeAttr.ID], level.dateRangeTagCount);
+              level.dateRangeTagCount++;
+              if (dateRange.isValid || level.skippedSegments) {
+                level.dateRanges[dateRange.id] = dateRange;
+              } else {
+                logger.warn(`Ignoring invalid DATERANGE tag: "${value1}"`);
+              }
+              // Add to fragment tag list for backwards compatibility (< v1.2.0)
+              frag.tagList.push(['EXT-X-DATERANGE', value1]);
+              break;
+            }
+          case 'DEFINE':
+            {
+              {
+                const variableAttributes = new AttrList(value1, level);
+                if ('IMPORT' in variableAttributes) {
+                  importVariableDefinition(level, variableAttributes, multivariantVariableList);
+                } else {
+                  addVariableDefinition(level, variableAttributes, baseurl);
+                }
+              }
+              break;
+            }
+          case 'DISCONTINUITY-SEQUENCE':
+            if (level.startCC !== 0) {
+              assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+            } else if (fragments.length > 0) {
+              assignMustAppearBeforeSegmentsError(level, tag, result);
+            }
+            level.startCC = discontinuityCounter = parseInt(value1);
+            break;
+          case 'KEY':
+            {
+              const levelKey = parseKey(value1, baseurl, level);
+              if (levelKey.isSupported()) {
+                if (levelKey.method === 'NONE') {
+                  levelkeys = undefined;
+                  break;
+                }
+                if (!levelkeys) {
+                  levelkeys = {};
+                }
+                const currentKey = levelkeys[levelKey.keyFormat];
+                // Ignore duplicate playlist KEY tags
+                if (!(currentKey != null && currentKey.matches(levelKey))) {
+                  if (currentKey) {
+                    levelkeys = _extends({}, levelkeys);
+                  }
+                  levelkeys[levelKey.keyFormat] = levelKey;
+                }
+              } else {
+                logger.warn(`[Keys] Ignoring unsupported EXT-X-KEY tag: "${value1}"${'' }`);
+              }
+              break;
+            }
+          case 'START':
+            level.startTimeOffset = parseStartTimeOffset(value1);
+            break;
+          case 'MAP':
+            {
+              const mapAttrs = new AttrList(value1, level);
+              if (frag.duration) {
+                // Initial segment tag is after segment duration tag.
+                //   #EXTINF: 6.0
+                //   #EXT-X-MAP:URI="init.mp4
+                const init = new Fragment(type, base);
+                setInitSegment(init, mapAttrs, id, levelkeys);
+                currentInitSegment = init;
+                frag.initSegment = currentInitSegment;
+                if (currentInitSegment.rawProgramDateTime && !frag.rawProgramDateTime) {
+                  frag.rawProgramDateTime = currentInitSegment.rawProgramDateTime;
+                }
+              } else {
+                // Initial segment tag is before segment duration tag
+                // Handle case where EXT-X-MAP is declared after EXT-X-BYTERANGE
+                const end = frag.byteRangeEndOffset;
+                if (end) {
+                  const start = frag.byteRangeStartOffset;
+                  nextByteRange = `${end - start}@${start}`;
+                } else {
+                  nextByteRange = null;
+                }
+                setInitSegment(frag, mapAttrs, id, levelkeys);
+                currentInitSegment = frag;
+                createNextFrag = true;
+              }
+              currentInitSegment.cc = discontinuityCounter;
+              break;
+            }
+          case 'SERVER-CONTROL':
+            {
+              if (serverControlAttrs) {
+                assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+              }
+              serverControlAttrs = new AttrList(value1);
+              level.canBlockReload = serverControlAttrs.bool('CAN-BLOCK-RELOAD');
+              level.canSkipUntil = serverControlAttrs.optionalFloat('CAN-SKIP-UNTIL', 0);
+              level.canSkipDateRanges = level.canSkipUntil > 0 && serverControlAttrs.bool('CAN-SKIP-DATERANGES');
+              level.partHoldBack = serverControlAttrs.optionalFloat('PART-HOLD-BACK', 0);
+              level.holdBack = serverControlAttrs.optionalFloat('HOLD-BACK', 0);
+              break;
+            }
+          case 'PART-INF':
+            {
+              if (level.partTarget) {
+                assignMultipleMediaPlaylistTagOccuranceError(level, tag, result);
+              }
+              const partInfAttrs = new AttrList(value1);
+              level.partTarget = partInfAttrs.decimalFloatingPoint('PART-TARGET');
+              break;
+            }
+          case 'PART':
+            {
+              let partList = level.partList;
+              if (!partList) {
+                partList = level.partList = [];
+              }
+              const previousFragmentPart = currentPart > 0 ? partList[partList.length - 1] : undefined;
+              const index = currentPart++;
+              const partAttrs = new AttrList(value1, level);
+              const part = new Part(partAttrs, frag, base, index, previousFragmentPart);
+              partList.push(part);
+              frag.duration += part.duration;
+              break;
+            }
+          case 'PRELOAD-HINT':
+            {
+              const preloadHintAttrs = new AttrList(value1, level);
+              level.preloadHint = preloadHintAttrs;
+              break;
+            }
+          case 'RENDITION-REPORT':
+            {
+              const renditionReportAttrs = new AttrList(value1, level);
+              level.renditionReports = level.renditionReports || [];
+              level.renditionReports.push(renditionReportAttrs);
+              break;
+            }
+          default:
+            logger.warn(`line parsed but not handled: ${result}`);
+            break;
+        }
+      }
+    }
+    if (prevFrag && !prevFrag.relurl) {
+      fragments.pop();
+      totalduration -= prevFrag.duration;
+      if (level.partList) {
+        level.fragmentHint = prevFrag;
+      }
+    } else if (level.partList) {
+      assignProgramDateTime(frag, prevFrag, programDateTimes);
+      frag.cc = discontinuityCounter;
+      level.fragmentHint = frag;
+      if (levelkeys) {
+        setFragLevelKeys(frag, levelkeys, level);
+      }
+    }
+    if (!level.targetduration) {
+      level.playlistParsingError = new Error(`Missing Target Duration`);
+    }
+    const fragmentLength = fragments.length;
+    const firstFragment = fragments[0];
+    const lastFragment = fragments[fragmentLength - 1];
+    totalduration += level.skippedSegments * level.targetduration;
+    if (totalduration > 0 && fragmentLength && lastFragment) {
+      level.averagetargetduration = totalduration / fragmentLength;
+      const lastSn = lastFragment.sn;
+      level.endSN = lastSn !== 'initSegment' ? lastSn : 0;
+      if (!level.live) {
+        lastFragment.endList = true;
+      }
+      /**
+       * Backfill any missing PDT values
+       * "If the first EXT-X-PROGRAM-DATE-TIME tag in a Playlist appears after
+       * one or more Media Segment URIs, the client SHOULD extrapolate
+       * backward from that tag (using EXTINF durations and/or media
+       * timestamps) to associate dates with those segments."
+       * We have already extrapolated forward, but all fragments up to the first instance of PDT do not have their PDTs
+       * computed.
+       */
+      if (firstPdtIndex > 0) {
+        backfillProgramDateTimes(fragments, firstPdtIndex);
+        if (firstFragment) {
+          programDateTimes.unshift(firstFragment);
+        }
+      }
+    }
+    if (level.fragmentHint) {
+      totalduration += level.fragmentHint.duration;
+    }
+    level.totalduration = totalduration;
+    if (programDateTimes.length && level.dateRangeTagCount && firstFragment) {
+      mapDateRanges(programDateTimes, level);
+    }
+    level.endCC = discontinuityCounter;
+    return level;
+  }
+}
+function mapDateRanges(programDateTimes, details) {
+  // Make sure DateRanges are mapped to a ProgramDateTime tag that applies a date to a segment that overlaps with its start date
+  let programDateTimeCount = programDateTimes.length;
+  if (!programDateTimeCount) {
+    if (details.hasProgramDateTime) {
+      const lastFragment = details.fragments[details.fragments.length - 1];
+      programDateTimes.push(lastFragment);
+      programDateTimeCount++;
+    } else {
+      // no segments with EXT-X-PROGRAM-DATE-TIME references in playlist history
+      return;
+    }
+  }
+  const lastProgramDateTime = programDateTimes[programDateTimeCount - 1];
+  const playlistEnd = details.live ? Infinity : details.totalduration;
+  const dateRangeIds = Object.keys(details.dateRanges);
+  for (let i = dateRangeIds.length; i--;) {
+    const dateRange = details.dateRanges[dateRangeIds[i]];
+    const startDateTime = dateRange.startDate.getTime();
+    dateRange.tagAnchor = lastProgramDateTime.ref;
+    for (let j = programDateTimeCount; j--;) {
+      var _programDateTimes$j;
+      if (((_programDateTimes$j = programDateTimes[j]) == null ? void 0 : _programDateTimes$j.sn) < details.startSN) {
+        break;
+      }
+      const fragIndex = findFragmentWithStartDate(details, startDateTime, programDateTimes, j, playlistEnd);
+      if (fragIndex !== -1) {
+        dateRange.tagAnchor = details.fragments[fragIndex].ref;
+        break;
+      }
+    }
+  }
+}
+function findFragmentWithStartDate(details, startDateTime, programDateTimes, index, endTime) {
+  const pdtFragment = programDateTimes[index];
+  if (pdtFragment) {
+    // find matching range between PDT tags
+    const pdtStart = pdtFragment.programDateTime;
+    if (startDateTime >= pdtStart || index === 0) {
+      var _programDateTimes;
+      const durationBetweenPdt = (((_programDateTimes = programDateTimes[index + 1]) == null ? void 0 : _programDateTimes.start) || endTime) - pdtFragment.start;
+      if (startDateTime <= pdtStart + durationBetweenPdt * 1000) {
+        // map to fragment with date-time range
+        const startIndex = programDateTimes[index].sn - details.startSN;
+        if (startIndex < 0) {
+          return -1;
+        }
+        const fragments = details.fragments;
+        if (fragments.length > programDateTimes.length) {
+          const endSegment = programDateTimes[index + 1] || fragments[fragments.length - 1];
+          const endIndex = endSegment.sn - details.startSN;
+          for (let i = endIndex; i > startIndex; i--) {
+            const fragStartDateTime = fragments[i].programDateTime;
+            if (startDateTime >= fragStartDateTime && startDateTime < fragStartDateTime + fragments[i].duration * 1000) {
+              return i;
+            }
+          }
+        }
+        return startIndex;
+      }
+    }
+  }
+  return -1;
+}
+function parseKey(keyTagAttributes, baseurl, parsed) {
+  var _keyAttrs$METHOD, _keyAttrs$KEYFORMAT;
+  // https://tools.ietf.org/html/rfc8216#section-4.3.2.4
+  const keyAttrs = new AttrList(keyTagAttributes, parsed);
+  const decryptmethod = (_keyAttrs$METHOD = keyAttrs.METHOD) != null ? _keyAttrs$METHOD : '';
+  const decrypturi = keyAttrs.URI;
+  const decryptiv = keyAttrs.hexadecimalInteger('IV');
+  const decryptkeyformatversions = keyAttrs.KEYFORMATVERSIONS;
+  // From RFC: This attribute is OPTIONAL; its absence indicates an implicit value of "identity".
+  const decryptkeyformat = (_keyAttrs$KEYFORMAT = keyAttrs.KEYFORMAT) != null ? _keyAttrs$KEYFORMAT : 'identity';
+  if (decrypturi && keyAttrs.IV && !decryptiv) {
+    logger.error(`Invalid IV: ${keyAttrs.IV}`);
+  }
+  // If decrypturi is a URI with a scheme, then baseurl will be ignored
+  // No uri is allowed when METHOD is NONE
+  const resolvedUri = decrypturi ? M3U8Parser.resolve(decrypturi, baseurl) : '';
+  const keyFormatVersions = (decryptkeyformatversions ? decryptkeyformatversions : '1').split('/').map(Number).filter(Number.isFinite);
+  return new LevelKey(decryptmethod, resolvedUri, decryptkeyformat, keyFormatVersions, decryptiv, keyAttrs.KEYID);
+}
+function parseStartTimeOffset(startAttributes) {
+  const startAttrs = new AttrList(startAttributes);
+  const startTimeOffset = startAttrs.decimalFloatingPoint('TIME-OFFSET');
+  if (isFiniteNumber(startTimeOffset)) {
+    return startTimeOffset;
+  }
+  return null;
+}
+function setCodecs(codecsAttributeValue, level) {
+  let codecs = (codecsAttributeValue || '').split(/[ ,]+/).filter(c => c);
+  ['video', 'audio', 'text'].forEach(type => {
+    const filtered = codecs.filter(codec => isCodecType(codec, type));
+    if (filtered.length) {
+      // Comma separated list of all codecs for type
+      level[`${type}Codec`] = filtered.map(c => c.split('/')[0]).join(',');
+      // Remove known codecs so that only unknownCodecs are left after iterating through each type
+      codecs = codecs.filter(codec => filtered.indexOf(codec) === -1);
+    }
+  });
+  level.unknownCodecs = codecs;
+}
+function assignCodec(media, groupItem, codecProperty) {
+  const codecValue = groupItem[codecProperty];
+  if (codecValue) {
+    media[codecProperty] = codecValue;
+  }
+}
+function backfillProgramDateTimes(fragments, firstPdtIndex) {
+  let fragPrev = fragments[firstPdtIndex];
+  for (let i = firstPdtIndex; i--;) {
+    const frag = fragments[i];
+    // Exit on delta-playlist skipped segments
+    if (!frag) {
+      return;
+    }
+    frag.programDateTime = fragPrev.programDateTime - frag.duration * 1000;
+    fragPrev = frag;
+  }
+}
+function assignProgramDateTime(frag, prevFrag, programDateTimes) {
+  if (frag.rawProgramDateTime) {
+    programDateTimes.push(frag);
+  } else if (prevFrag != null && prevFrag.programDateTime) {
+    frag.programDateTime = prevFrag.endProgramDateTime;
+  }
+}
+function setInitSegment(frag, mapAttrs, id, levelkeys) {
+  frag.relurl = mapAttrs.URI;
+  if (mapAttrs.BYTERANGE) {
+    frag.setByteRange(mapAttrs.BYTERANGE);
+  }
+  frag.level = id;
+  frag.sn = 'initSegment';
+  if (levelkeys) {
+    frag.levelkeys = levelkeys;
+  }
+  frag.initSegment = null;
+}
+function setFragLevelKeys(frag, levelkeys, level) {
+  frag.levelkeys = levelkeys;
+  const {
+    encryptedFragments
+  } = level;
+  if ((!encryptedFragments.length || encryptedFragments[encryptedFragments.length - 1].levelkeys !== levelkeys) && Object.keys(levelkeys).some(format => levelkeys[format].isCommonEncryption)) {
+    encryptedFragments.push(frag);
+  }
+}
+function assignMultipleMediaPlaylistTagOccuranceError(level, tag, result) {
+  level.playlistParsingError = new Error(`#EXT-X-${tag} must not appear more than once (${result[0]})`);
+}
+function assignMustAppearBeforeSegmentsError(level, tag, result) {
+  level.playlistParsingError = new Error(`#EXT-X-${tag} must appear before the first Media Segment (${result[0]})`);
+}
+
+function updateFromToPTS(fragFrom, fragTo) {
+  const fragToPTS = fragTo.startPTS;
+  // if we know startPTS[toIdx]
+  if (isFiniteNumber(fragToPTS)) {
+    // update fragment duration.
+    // it helps to fix drifts between playlist reported duration and fragment real duration
+    let duration = 0;
+    let frag;
+    if (fragTo.sn > fragFrom.sn) {
+      duration = fragToPTS - fragFrom.start;
+      frag = fragFrom;
+    } else {
+      duration = fragFrom.start - fragToPTS;
+      frag = fragTo;
+    }
+    if (frag.duration !== duration) {
+      frag.setDuration(duration);
+    }
+    // we dont know startPTS[toIdx]
+  } else if (fragTo.sn > fragFrom.sn) {
+    const contiguous = fragFrom.cc === fragTo.cc;
+    // TODO: With part-loading end/durations we need to confirm the whole fragment is loaded before using (or setting) minEndPTS
+    if (contiguous && fragFrom.minEndPTS) {
+      fragTo.setStart(fragFrom.start + (fragFrom.minEndPTS - fragFrom.start));
+    } else {
+      fragTo.setStart(fragFrom.start + fragFrom.duration);
+    }
+  } else {
+    fragTo.setStart(Math.max(fragFrom.start - fragTo.duration, 0));
+  }
+}
+function updateFragPTSDTS(details, frag, startPTS, endPTS, startDTS, endDTS, logger) {
+  const parsedMediaDuration = endPTS - startPTS;
+  if (parsedMediaDuration <= 0) {
+    logger.warn('Fragment should have a positive duration', frag);
+    endPTS = startPTS + frag.duration;
+    endDTS = startDTS + frag.duration;
+  }
+  let maxStartPTS = startPTS;
+  let minEndPTS = endPTS;
+  const fragStartPts = frag.startPTS;
+  const fragEndPts = frag.endPTS;
+  if (isFiniteNumber(fragStartPts)) {
+    // delta PTS between audio and video
+    const deltaPTS = Math.abs(fragStartPts - startPTS);
+    if (details && deltaPTS > details.totalduration) {
+      logger.warn(`media timestamps and playlist times differ by ${deltaPTS}s for level ${frag.level} ${details.url}`);
+    } else if (!isFiniteNumber(frag.deltaPTS)) {
+      frag.deltaPTS = deltaPTS;
+    } else {
+      frag.deltaPTS = Math.max(deltaPTS, frag.deltaPTS);
+    }
+    maxStartPTS = Math.max(startPTS, fragStartPts);
+    startPTS = Math.min(startPTS, fragStartPts);
+    startDTS = frag.startDTS !== undefined ? Math.min(startDTS, frag.startDTS) : startDTS;
+    minEndPTS = Math.min(endPTS, fragEndPts);
+    endPTS = Math.max(endPTS, fragEndPts);
+    endDTS = frag.endDTS !== undefined ? Math.max(endDTS, frag.endDTS) : endDTS;
+  }
+  const drift = startPTS - frag.start;
+  if (frag.start !== 0) {
+    frag.setStart(startPTS);
+  }
+  frag.setDuration(endPTS - frag.start);
+  frag.startPTS = startPTS;
+  frag.maxStartPTS = maxStartPTS;
+  frag.startDTS = startDTS;
+  frag.endPTS = endPTS;
+  frag.minEndPTS = minEndPTS;
+  frag.endDTS = endDTS;
+  const sn = frag.sn;
+  // exit if sn out of range
+  if (!details || sn < details.startSN || sn > details.endSN) {
+    return 0;
+  }
+  let i;
+  const fragIdx = sn - details.startSN;
+  const fragments = details.fragments;
+  // update frag reference in fragments array
+  // rationale is that fragments array might not contain this frag object.
+  // this will happen if playlist has been refreshed between frag loading and call to updateFragPTSDTS()
+  // if we don't update frag, we won't be able to propagate PTS info on the playlist
+  // resulting in invalid sliding computation
+  fragments[fragIdx] = frag;
+  // adjust fragment PTS/duration from seqnum-1 to frag 0
+  for (i = fragIdx; i > 0; i--) {
+    updateFromToPTS(fragments[i], fragments[i - 1]);
+  }
+
+  // adjust fragment PTS/duration from seqnum to last frag
+  for (i = fragIdx; i < fragments.length - 1; i++) {
+    updateFromToPTS(fragments[i], fragments[i + 1]);
+  }
+  if (details.fragmentHint) {
+    updateFromToPTS(fragments[fragments.length - 1], details.fragmentHint);
+  }
+  details.PTSKnown = details.alignedSliding = true;
+  return drift;
+}
+function mergeDetails(oldDetails, newDetails, logger) {
+  if (oldDetails === newDetails) {
+    return;
+  }
+  // Track the last initSegment processed. Initialize it to the last one on the timeline.
+  let currentInitSegment = null;
+  const oldFragments = oldDetails.fragments;
+  for (let i = oldFragments.length - 1; i >= 0; i--) {
+    const oldInit = oldFragments[i].initSegment;
+    if (oldInit) {
+      currentInitSegment = oldInit;
+      break;
+    }
+  }
+  if (oldDetails.fragmentHint) {
+    // prevent PTS and duration from being adjusted on the next hint
+    delete oldDetails.fragmentHint.endPTS;
+  }
+  // check if old/new playlists have fragments in common
+  // loop through overlapping SN and update startPTS, cc, and duration if any found
+  let PTSFrag;
+  mapFragmentIntersection(oldDetails, newDetails, (oldFrag, newFrag, newFragIndex, newFragments) => {
+    if ((!newDetails.startCC || newDetails.skippedSegments) && newFrag.cc !== oldFrag.cc) {
+      const ccOffset = oldFrag.cc - newFrag.cc;
+      for (let i = newFragIndex; i < newFragments.length; i++) {
+        newFragments[i].cc += ccOffset;
+      }
+      newDetails.endCC = newFragments[newFragments.length - 1].cc;
+    }
+    if (isFiniteNumber(oldFrag.startPTS) && isFiniteNumber(oldFrag.endPTS)) {
+      newFrag.setStart(newFrag.startPTS = oldFrag.startPTS);
+      newFrag.startDTS = oldFrag.startDTS;
+      newFrag.maxStartPTS = oldFrag.maxStartPTS;
+      newFrag.endPTS = oldFrag.endPTS;
+      newFrag.endDTS = oldFrag.endDTS;
+      newFrag.minEndPTS = oldFrag.minEndPTS;
+      newFrag.setDuration(oldFrag.endPTS - oldFrag.startPTS);
+      if (newFrag.duration) {
+        PTSFrag = newFrag;
+      }
+
+      // PTS is known when any segment has startPTS and endPTS
+      newDetails.PTSKnown = newDetails.alignedSliding = true;
+    }
+    if (oldFrag.hasStreams) {
+      newFrag.elementaryStreams = oldFrag.elementaryStreams;
+    }
+    newFrag.loader = oldFrag.loader;
+    if (oldFrag.hasStats) {
+      newFrag.stats = oldFrag.stats;
+    }
+    if (oldFrag.initSegment) {
+      newFrag.initSegment = oldFrag.initSegment;
+      currentInitSegment = oldFrag.initSegment;
+    }
+  });
+  const newFragments = newDetails.fragments;
+  const fragmentsToCheck = newDetails.fragmentHint ? newFragments.concat(newDetails.fragmentHint) : newFragments;
+  if (currentInitSegment) {
+    fragmentsToCheck.forEach(frag => {
+      var _currentInitSegment;
+      if (frag && (!frag.initSegment || frag.initSegment.relurl === ((_currentInitSegment = currentInitSegment) == null ? void 0 : _currentInitSegment.relurl))) {
+        frag.initSegment = currentInitSegment;
+      }
+    });
+  }
+  if (newDetails.skippedSegments) {
+    newDetails.deltaUpdateFailed = newFragments.some(frag => !frag);
+    if (newDetails.deltaUpdateFailed) {
+      logger.warn('[level-helper] Previous playlist missing segments skipped in delta playlist');
+      for (let i = newDetails.skippedSegments; i--;) {
+        newFragments.shift();
+      }
+      newDetails.startSN = newFragments[0].sn;
+    } else {
+      if (newDetails.canSkipDateRanges) {
+        newDetails.dateRanges = mergeDateRanges(oldDetails.dateRanges, newDetails, logger);
+      }
+      const programDateTimes = oldDetails.fragments.filter(frag => frag.rawProgramDateTime);
+      if (oldDetails.hasProgramDateTime && !newDetails.hasProgramDateTime) {
+        for (let i = 1; i < fragmentsToCheck.length; i++) {
+          if (fragmentsToCheck[i].programDateTime === null) {
+            assignProgramDateTime(fragmentsToCheck[i], fragmentsToCheck[i - 1], programDateTimes);
+          }
+        }
+      }
+      mapDateRanges(programDateTimes, newDetails);
+    }
+    newDetails.endCC = newFragments[newFragments.length - 1].cc;
+  }
+  if (!newDetails.startCC) {
+    var _fragPriorToNewStart$;
+    const fragPriorToNewStart = getFragmentWithSN(oldDetails, newDetails.startSN - 1);
+    newDetails.startCC = (_fragPriorToNewStart$ = fragPriorToNewStart == null ? void 0 : fragPriorToNewStart.cc) != null ? _fragPriorToNewStart$ : newFragments[0].cc;
+  }
+
+  // Merge parts
+  mapPartIntersection(oldDetails.partList, newDetails.partList, (oldPart, newPart) => {
+    newPart.elementaryStreams = oldPart.elementaryStreams;
+    newPart.stats = oldPart.stats;
+  });
+
+  // if at least one fragment contains PTS info, recompute PTS information for all fragments
+  if (PTSFrag) {
+    updateFragPTSDTS(newDetails, PTSFrag, PTSFrag.startPTS, PTSFrag.endPTS, PTSFrag.startDTS, PTSFrag.endDTS, logger);
+  } else {
+    // ensure that delta is within oldFragments range
+    // also adjust sliding in case delta is 0 (we could have old=[50-60] and new=old=[50-61])
+    // in that case we also need to adjust start offset of all fragments
+    adjustSliding(oldDetails, newDetails);
+  }
+  if (newFragments.length) {
+    newDetails.totalduration = newDetails.edge - newFragments[0].start;
+  }
+  newDetails.driftStartTime = oldDetails.driftStartTime;
+  newDetails.driftStart = oldDetails.driftStart;
+  const advancedDateTime = newDetails.advancedDateTime;
+  if (newDetails.advanced && advancedDateTime) {
+    const edge = newDetails.edge;
+    if (!newDetails.driftStart) {
+      newDetails.driftStartTime = advancedDateTime;
+      newDetails.driftStart = edge;
+    }
+    newDetails.driftEndTime = advancedDateTime;
+    newDetails.driftEnd = edge;
+  } else {
+    newDetails.driftEndTime = oldDetails.driftEndTime;
+    newDetails.driftEnd = oldDetails.driftEnd;
+    newDetails.advancedDateTime = oldDetails.advancedDateTime;
+  }
+  if (newDetails.requestScheduled === -1) {
+    newDetails.requestScheduled = oldDetails.requestScheduled;
+  }
+}
+function mergeDateRanges(oldDateRanges, newDetails, logger) {
+  const {
+    dateRanges: deltaDateRanges,
+    recentlyRemovedDateranges
+  } = newDetails;
+  const dateRanges = _extends({}, oldDateRanges);
+  if (recentlyRemovedDateranges) {
+    recentlyRemovedDateranges.forEach(id => {
+      delete dateRanges[id];
+    });
+  }
+  const mergeIds = Object.keys(dateRanges);
+  const mergeCount = mergeIds.length;
+  if (!mergeCount) {
+    return deltaDateRanges;
+  }
+  Object.keys(deltaDateRanges).forEach(id => {
+    const mergedDateRange = dateRanges[id];
+    const dateRange = new DateRange(deltaDateRanges[id].attr, mergedDateRange);
+    if (dateRange.isValid) {
+      dateRanges[id] = dateRange;
+      if (!mergedDateRange) {
+        dateRange.tagOrder += mergeCount;
+      }
+    } else {
+      logger.warn(`Ignoring invalid Playlist Delta Update DATERANGE tag: "${stringify(deltaDateRanges[id].attr)}"`);
+    }
+  });
+  return dateRanges;
+}
+function mapPartIntersection(oldParts, newParts, intersectionFn) {
+  if (oldParts && newParts) {
+    let delta = 0;
+    for (let i = 0, len = oldParts.length; i <= len; i++) {
+      const oldPart = oldParts[i];
+      const newPart = newParts[i + delta];
+      if (oldPart && newPart && oldPart.index === newPart.index && oldPart.fragment.sn === newPart.fragment.sn) {
+        intersectionFn(oldPart, newPart);
+      } else {
+        delta--;
+      }
+    }
+  }
+}
+function mapFragmentIntersection(oldDetails, newDetails, intersectionFn) {
+  const skippedSegments = newDetails.skippedSegments;
+  const start = Math.max(oldDetails.startSN, newDetails.startSN) - newDetails.startSN;
+  const end = (oldDetails.fragmentHint ? 1 : 0) + (skippedSegments ? newDetails.endSN : Math.min(oldDetails.endSN, newDetails.endSN)) - newDetails.startSN;
+  const delta = newDetails.startSN - oldDetails.startSN;
+  const newFrags = newDetails.fragmentHint ? newDetails.fragments.concat(newDetails.fragmentHint) : newDetails.fragments;
+  const oldFrags = oldDetails.fragmentHint ? oldDetails.fragments.concat(oldDetails.fragmentHint) : oldDetails.fragments;
+  for (let i = start; i <= end; i++) {
+    const oldFrag = oldFrags[delta + i];
+    let newFrag = newFrags[i];
+    if (skippedSegments && !newFrag && oldFrag) {
+      // Fill in skipped segments in delta playlist
+      newFrag = newDetails.fragments[i] = oldFrag;
+    }
+    if (oldFrag && newFrag) {
+      intersectionFn(oldFrag, newFrag, i, newFrags);
+      const uriBefore = oldFrag.relurl;
+      const uriAfter = newFrag.relurl;
+      if (uriBefore && notEqualAfterStrippingQueries(uriBefore, uriAfter)) {
+        newDetails.playlistParsingError = getSequenceError(`media sequence mismatch ${newFrag.sn}:`, oldDetails, newDetails, oldFrag, newFrag);
+        return;
+      } else if (oldFrag.cc !== newFrag.cc) {
+        newDetails.playlistParsingError = getSequenceError(`discontinuity sequence mismatch (${oldFrag.cc}!=${newFrag.cc})`, oldDetails, newDetails, oldFrag, newFrag);
+        return;
+      }
+    }
+  }
+}
+function getSequenceError(message, oldDetails, newDetails, oldFrag, newFrag) {
+  return new Error(`${message} ${newFrag.url}
+Playlist starting @${oldDetails.startSN}
+${oldDetails.m3u8}
+
+Playlist starting @${newDetails.startSN}
+${newDetails.m3u8}`);
+}
+function adjustSliding(oldDetails, newDetails, matchingStableVariantOrRendition = true) {
+  const delta = newDetails.startSN + newDetails.skippedSegments - oldDetails.startSN;
+  const oldFragments = oldDetails.fragments;
+  const advancedOrStable = delta >= 0;
+  let sliding = 0;
+  if (advancedOrStable && delta < oldFragments.length) {
+    sliding = oldFragments[delta].start;
+  } else if (advancedOrStable && newDetails.startSN === oldDetails.endSN + 1) {
+    sliding = oldDetails.fragmentEnd;
+  } else if (advancedOrStable && matchingStableVariantOrRendition) {
+    // align with expected position (updated playlist start sequence is past end sequence of last update)
+    sliding = oldDetails.fragmentStart + delta * newDetails.levelTargetDuration;
+  } else if (!newDetails.skippedSegments && newDetails.fragmentStart === 0) {
+    // align new start with old (playlist switch has a sequence with no overlap and should not be used for alignment)
+    sliding = oldDetails.fragmentStart;
+  } else {
+    // new details already has a sliding offset or has skipped segments
+    return;
+  }
+  addSliding(newDetails, sliding);
+}
+function addSliding(details, sliding) {
+  if (sliding) {
+    const fragments = details.fragments;
+    for (let i = details.skippedSegments; i < fragments.length; i++) {
+      fragments[i].addStart(sliding);
+    }
+    if (details.fragmentHint) {
+      details.fragmentHint.addStart(sliding);
+    }
+  }
+}
+function computeReloadInterval(newDetails, distanceToLiveEdgeMs = Infinity) {
+  let reloadInterval = 1000 * newDetails.targetduration;
+  if (newDetails.updated) {
+    // Use last segment duration when shorter than target duration and near live edge
+    const fragments = newDetails.fragments;
+    const liveEdgeMaxTargetDurations = 4;
+    if (fragments.length && reloadInterval * liveEdgeMaxTargetDurations > distanceToLiveEdgeMs) {
+      const lastSegmentDuration = fragments[fragments.length - 1].duration * 1000;
+      if (lastSegmentDuration < reloadInterval) {
+        reloadInterval = lastSegmentDuration;
+      }
+    }
+  } else {
+    // estimate = 'miss half average';
+    // follow HLS Spec, If the client reloads a Playlist file and finds that it has not
+    // changed then it MUST wait for a period of one-half the target
+    // duration before retrying.
+    reloadInterval /= 2;
+  }
+  return Math.round(reloadInterval);
+}
+function getFragmentWithSN(details, sn, fragCurrent) {
+  if (!details) {
+    return null;
+  }
+  let fragment = details.fragments[sn - details.startSN];
+  if (fragment) {
+    return fragment;
+  }
+  fragment = details.fragmentHint;
+  if (fragment && fragment.sn === sn) {
+    return fragment;
+  }
+  if (sn < details.startSN && fragCurrent && fragCurrent.sn === sn) {
+    return fragCurrent;
+  }
+  return null;
+}
+function getPartWith(details, sn, partIndex) {
+  if (!details) {
+    return null;
+  }
+  return findPart(details.partList, sn, partIndex);
+}
+function findPart(partList, sn, partIndex) {
+  if (partList) {
+    for (let i = partList.length; i--;) {
+      const part = partList[i];
+      if (part.index === partIndex && part.fragment.sn === sn) {
+        return part;
+      }
+    }
+  }
+  return null;
+}
+function reassignFragmentLevelIndexes(levels) {
+  levels.forEach((level, index) => {
+    var _level$details;
+    (_level$details = level.details) == null || _level$details.fragments.forEach(fragment => {
+      fragment.level = index;
+      if (fragment.initSegment) {
+        fragment.initSegment.level = index;
+      }
+    });
+  });
+}
+function notEqualAfterStrippingQueries(uriBefore, uriAfter) {
+  if (uriBefore !== uriAfter && uriAfter) {
+    return stripQuery(uriBefore) !== stripQuery(uriAfter);
+  }
+  return false;
+}
+function stripQuery(uri) {
+  return uri.replace(/\?[^?]*$/, '');
+}
+
+function findFirstFragWithCC(fragments, cc) {
+  for (let i = 0, len = fragments.length; i < len; i++) {
+    var _fragments$i;
+    if (((_fragments$i = fragments[i]) == null ? void 0 : _fragments$i.cc) === cc) {
+      return fragments[i];
+    }
+  }
+  return null;
+}
+function shouldAlignOnDiscontinuities(refDetails, details) {
+  if (refDetails) {
+    if (details.startCC < refDetails.endCC && details.endCC > refDetails.startCC) {
+      return true;
+    }
+  }
+  return false;
+}
+function adjustFragmentStart(frag, sliding) {
+  const start = frag.start + sliding;
+  frag.startPTS = start;
+  frag.setStart(start);
+  frag.endPTS = start + frag.duration;
+}
+function adjustSlidingStart(sliding, details) {
+  // Update segments
+  const fragments = details.fragments;
+  for (let i = 0, len = fragments.length; i < len; i++) {
+    adjustFragmentStart(fragments[i], sliding);
+  }
+  // Update LL-HLS parts at the end of the playlist
+  if (details.fragmentHint) {
+    adjustFragmentStart(details.fragmentHint, sliding);
+  }
+  details.alignedSliding = true;
+}
+
+/**
+ * Using the parameters of the last level, this function computes PTS' of the new fragments so that they form a
+ * contiguous stream with the last fragments.
+ * The PTS of a fragment lets Hls.js know where it fits into a stream - by knowing every PTS, we know which fragment to
+ * download at any given time. PTS is normally computed when the fragment is demuxed, so taking this step saves us time
+ * and an extra download.
+ * @param lastLevel
+ * @param details
+ */
+function alignStream(switchDetails, details) {
+  if (!switchDetails) {
+    return;
+  }
+  alignDiscontinuities(details, switchDetails);
+  if (!details.alignedSliding) {
+    // If the PTS wasn't figured out via discontinuity sequence that means there was no CC increase within the level.
+    // Aligning via Program Date Time should therefore be reliable, since PDT should be the same within the same
+    // discontinuity sequence.
+    alignMediaPlaylistByPDT(details, switchDetails);
+  }
+  if (!details.alignedSliding && !details.skippedSegments) {
+    // Try to align on sn so that we pick a better start fragment.
+    // Do not perform this on playlists with delta updates as this is only to align levels on switch
+    // and adjustSliding only adjusts fragments after skippedSegments.
+    adjustSliding(switchDetails, details, false);
+  }
+}
+
+/**
+ * Ajust the start of fragments in `details` by the difference in time between fragments of the latest
+ * shared discontinuity sequence change.
+ * @param lastLevel - The details of the last loaded level
+ * @param details - The details of the new level
+ */
+function alignDiscontinuities(details, refDetails) {
+  if (!shouldAlignOnDiscontinuities(refDetails, details)) {
+    return;
+  }
+  const targetCC = Math.min(refDetails.endCC, details.endCC);
+  const refFrag = findFirstFragWithCC(refDetails.fragments, targetCC);
+  const frag = findFirstFragWithCC(details.fragments, targetCC);
+  if (!refFrag || !frag) {
+    return;
+  }
+  logger.log(`Aligning playlist at start of dicontinuity sequence ${targetCC}`);
+  const delta = refFrag.start - frag.start;
+  adjustSlidingStart(delta, details);
+}
+
+/**
+ * Ensures appropriate time-alignment between renditions based on PDT.
+ * This function assumes the timelines represented in `refDetails` are accurate, including the PDTs
+ * for the last discontinuity sequence number shared by both playlists when present,
+ * and uses the "wallclock"/PDT timeline as a cross-reference to `details`, adjusting the presentation
+ * times/timelines of `details` accordingly.
+ * Given the asynchronous nature of fetches and initial loads of live `main` and audio/subtitle tracks,
+ * the primary purpose of this function is to ensure the "local timelines" of audio/subtitle tracks
+ * are aligned to the main/video timeline, using PDT as the cross-reference/"anchor" that should
+ * be consistent across playlists, per the HLS spec.
+ * @param details - The details of the rendition you'd like to time-align (e.g. an audio rendition).
+ * @param refDetails - The details of the reference rendition with start and PDT times for alignment.
+ */
+function alignMediaPlaylistByPDT(details, refDetails) {
+  if (!details.hasProgramDateTime || !refDetails.hasProgramDateTime) {
+    return;
+  }
+  const fragments = details.fragments;
+  const refFragments = refDetails.fragments;
+  if (!fragments.length || !refFragments.length) {
+    return;
+  }
+
+  // Calculate a delta to apply to all fragments according to the delta in PDT times and start times
+  // of a fragment in the reference details, and a fragment in the target details of the same discontinuity.
+  // If a fragment of the same discontinuity was not found use the middle fragment of both.
+  let refFrag;
+  let frag;
+  const targetCC = Math.min(refDetails.endCC, details.endCC);
+  if (refDetails.startCC < targetCC && details.startCC < targetCC) {
+    refFrag = findFirstFragWithCC(refFragments, targetCC);
+    frag = findFirstFragWithCC(fragments, targetCC);
+  }
+  if (!refFrag || !frag) {
+    refFrag = refFragments[Math.floor(refFragments.length / 2)];
+    frag = findFirstFragWithCC(fragments, refFrag.cc) || fragments[Math.floor(fragments.length / 2)];
+  }
+  const refPDT = refFrag.programDateTime;
+  const targetPDT = frag.programDateTime;
+  if (!refPDT || !targetPDT) {
+    return;
+  }
+  const delta = (targetPDT - refPDT) / 1000 - (frag.start - refFrag.start);
+  adjustSlidingStart(delta, details);
+}
+
+function addEventListener(el, type, listener) {
+  removeEventListener(el, type, listener);
+  el.addEventListener(type, listener);
+}
+function removeEventListener(el, type, listener) {
+  el.removeEventListener(type, listener);
+}
+
+/**
+ *  TimeRanges to string helper
+ */
+
+const TimeRanges = {
+  toString: function (r) {
+    let log = '';
+    const len = r.length;
+    for (let i = 0; i < len; i++) {
+      log += `[${r.start(i).toFixed(3)}-${r.end(i).toFixed(3)}]`;
+    }
+    return log;
+  }
+};
+
+const State = {
+  STOPPED: 'STOPPED',
+  IDLE: 'IDLE',
+  KEY_LOADING: 'KEY_LOADING',
+  FRAG_LOADING: 'FRAG_LOADING',
+  FRAG_LOADING_WAITING_RETRY: 'FRAG_LOADING_WAITING_RETRY',
+  WAITING_TRACK: 'WAITING_TRACK',
+  PARSING: 'PARSING',
+  PARSED: 'PARSED',
+  ENDED: 'ENDED',
+  ERROR: 'ERROR',
+  WAITING_INIT_PTS: 'WAITING_INIT_PTS',
+  WAITING_LEVEL: 'WAITING_LEVEL'
+};
+class BaseStreamController extends TaskLoop {
+  constructor(hls, fragmentTracker, keyLoader, logPrefix, playlistType) {
+    super(logPrefix, hls.logger);
+    this.hls = void 0;
+    this.fragPrevious = null;
+    this.fragCurrent = null;
+    this.fragmentTracker = void 0;
+    this.transmuxer = null;
+    this._state = State.STOPPED;
+    this.playlistType = void 0;
+    this.media = null;
+    this.mediaBuffer = null;
+    this.config = void 0;
+    this.bitrateTest = false;
+    this.lastCurrentTime = 0;
+    this.nextLoadPosition = 0;
+    this.startPosition = 0;
+    this.startTimeOffset = null;
+    this.retryDate = 0;
+    this.levels = null;
+    this.fragmentLoader = void 0;
+    this.keyLoader = void 0;
+    this.levelLastLoaded = null;
+    this.startFragRequested = false;
+    this.decrypter = void 0;
+    this.initPTS = [];
+    this.buffering = true;
+    this.loadingParts = false;
+    this.loopSn = void 0;
+    this.onMediaSeeking = () => {
+      const {
+        config,
+        fragCurrent,
+        media,
+        mediaBuffer,
+        state
+      } = this;
+      const currentTime = media ? media.currentTime : 0;
+      const bufferInfo = BufferHelper.bufferInfo(mediaBuffer ? mediaBuffer : media, currentTime, config.maxBufferHole);
+      const noFowardBuffer = !bufferInfo.len;
+      this.log(`Media seeking to ${isFiniteNumber(currentTime) ? currentTime.toFixed(3) : currentTime}, state: ${state}, ${noFowardBuffer ? 'out of' : 'in'} buffer`);
+      if (this.state === State.ENDED) {
+        this.resetLoadingState();
+      } else if (fragCurrent) {
+        // Seeking while frag load is in progress
+        const tolerance = config.maxFragLookUpTolerance;
+        const fragStartOffset = fragCurrent.start - tolerance;
+        const fragEndOffset = fragCurrent.start + fragCurrent.duration + tolerance;
+        // if seeking out of buffered range or into new one
+        if (noFowardBuffer || fragEndOffset < bufferInfo.start || fragStartOffset > bufferInfo.end) {
+          const pastFragment = currentTime > fragEndOffset;
+          // if the seek position is outside the current fragment range
+          if (currentTime < fragStartOffset || pastFragment) {
+            if (pastFragment && fragCurrent.loader) {
+              this.log(`Cancelling fragment load for seek (sn: ${fragCurrent.sn})`);
+              fragCurrent.abortRequests();
+              this.resetLoadingState();
+            }
+            this.fragPrevious = null;
+          }
+        }
+      }
+      if (media) {
+        // Remove gap fragments
+        this.fragmentTracker.removeFragmentsInRange(currentTime, Infinity, this.playlistType, true);
+
+        // Don't set lastCurrentTime with backward seeks (allows for frag selection with strict tolerances)
+        const lastCurrentTime = this.lastCurrentTime;
+        if (currentTime > lastCurrentTime) {
+          this.lastCurrentTime = currentTime;
+        }
+        if (!this.loadingParts) {
+          const bufferEnd = Math.max(bufferInfo.end, currentTime);
+          const shouldLoadParts = this.shouldLoadParts(this.getLevelDetails(), bufferEnd);
+          if (shouldLoadParts) {
+            this.log(`LL-Part loading ON after seeking to ${currentTime.toFixed(2)} with buffer @${bufferEnd.toFixed(2)}`);
+            this.loadingParts = shouldLoadParts;
+          }
+        }
+      }
+
+      // in case seeking occurs although no media buffered, adjust startPosition and nextLoadPosition to seek target
+      if (!this.hls.hasEnoughToStart) {
+        this.log(`Setting ${noFowardBuffer ? 'startPosition' : 'nextLoadPosition'} to ${currentTime} for seek without enough to start`);
+        this.nextLoadPosition = currentTime;
+        if (noFowardBuffer) {
+          this.startPosition = currentTime;
+        }
+      }
+      if (noFowardBuffer && this.state === State.IDLE) {
+        // Async tick to speed up processing
+        this.tickImmediate();
+      }
+    };
+    this.onMediaEnded = () => {
+      // reset startPosition and lastCurrentTime to restart playback @ stream beginning
+      this.log(`setting startPosition to 0 because media ended`);
+      this.startPosition = this.lastCurrentTime = 0;
+    };
+    this.playlistType = playlistType;
+    this.hls = hls;
+    this.fragmentLoader = new FragmentLoader(hls.config);
+    this.keyLoader = keyLoader;
+    this.fragmentTracker = fragmentTracker;
+    this.config = hls.config;
+    this.decrypter = new Decrypter(hls.config);
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  doTick() {
+    this.onTickEnd();
+  }
+  onTickEnd() {}
+  startLoad(startPosition) {}
+  stopLoad() {
+    if (this.state === State.STOPPED) {
+      return;
+    }
+    this.fragmentLoader.abort();
+    this.keyLoader.abort(this.playlistType);
+    const frag = this.fragCurrent;
+    if (frag != null && frag.loader) {
+      frag.abortRequests();
+      this.fragmentTracker.removeFragment(frag);
+    }
+    this.resetTransmuxer();
+    this.fragCurrent = null;
+    this.fragPrevious = null;
+    this.clearInterval();
+    this.clearNextTick();
+    this.state = State.STOPPED;
+  }
+  get startPositionValue() {
+    const {
+      nextLoadPosition,
+      startPosition
+    } = this;
+    if (startPosition === -1 && nextLoadPosition) {
+      return nextLoadPosition;
+    }
+    return startPosition;
+  }
+  get bufferingEnabled() {
+    return this.buffering;
+  }
+  pauseBuffering() {
+    this.buffering = false;
+  }
+  resumeBuffering() {
+    this.buffering = true;
+  }
+  get inFlightFrag() {
+    return {
+      frag: this.fragCurrent,
+      state: this.state
+    };
+  }
+  _streamEnded(bufferInfo, levelDetails) {
+    // Stream is never "ended" when playlist is live or media is detached
+    if (levelDetails.live || !this.media) {
+      return false;
+    }
+    // Stream is not "ended" when nothing is buffered past the start
+    const bufferEnd = bufferInfo.end || 0;
+    const timelineStart = this.config.timelineOffset || 0;
+    if (bufferEnd <= timelineStart) {
+      return false;
+    }
+    // Stream is not "ended" when there is a second buffered range starting before the end of the playlist
+    const bufferedRanges = bufferInfo.buffered;
+    if (this.config.maxBufferHole && bufferedRanges && bufferedRanges.length > 1) {
+      // make sure bufferInfo accounts for any gaps
+      bufferInfo = BufferHelper.bufferedInfo(bufferedRanges, bufferInfo.start, 0);
+    }
+    const nextStart = bufferInfo.nextStart;
+    const hasSecondBufferedRange = nextStart && nextStart > timelineStart && nextStart < levelDetails.edge;
+    if (hasSecondBufferedRange) {
+      return false;
+    }
+    // Playhead is in unbuffered region. Marking EoS now could result in Safari failing to dispatch "ended" event following seek on start.
+    if (this.media.currentTime < bufferInfo.start) {
+      return false;
+    }
+    const partList = levelDetails.partList;
+    // Since the last part isn't guaranteed to correspond to the last playlist segment for Low-Latency HLS,
+    // check instead if the last part is buffered.
+    if (partList != null && partList.length) {
+      const lastPart = partList[partList.length - 1];
+
+      // Checking the midpoint of the part for potential margin of error and related issues.
+      // NOTE: Technically I believe parts could yield content that is < the computed duration (including potential a duration of 0)
+      // and still be spec-compliant, so there may still be edge cases here. Likewise, there could be issues in end of stream
+      // part mismatches for independent audio and video playlists/segments.
+      const lastPartBuffered = BufferHelper.isBuffered(this.media, lastPart.start + lastPart.duration / 2);
+      return lastPartBuffered;
+    }
+    const playlistType = levelDetails.fragments[levelDetails.fragments.length - 1].type;
+    return this.fragmentTracker.isEndListAppended(playlistType);
+  }
+  getLevelDetails() {
+    if (this.levels && this.levelLastLoaded !== null) {
+      return this.levelLastLoaded.details;
+    }
+  }
+  get timelineOffset() {
+    const configuredTimelineOffset = this.config.timelineOffset;
+    if (configuredTimelineOffset) {
+      var _this$getLevelDetails;
+      return ((_this$getLevelDetails = this.getLevelDetails()) == null ? void 0 : _this$getLevelDetails.appliedTimelineOffset) || configuredTimelineOffset;
+    }
+    return 0;
+  }
+  onMediaAttached(event, data) {
+    const media = this.media = this.mediaBuffer = data.media;
+    addEventListener(media, 'seeking', this.onMediaSeeking);
+    addEventListener(media, 'ended', this.onMediaEnded);
+    const config = this.config;
+    if (this.levels && config.autoStartLoad && this.state === State.STOPPED) {
+      this.startLoad(config.startPosition);
+    }
+  }
+  onMediaDetaching(event, data) {
+    const transferringMedia = !!data.transferMedia;
+    const media = this.media;
+    if (media === null) {
+      return;
+    }
+    if (media.ended) {
+      this.log('MSE detaching and video ended, reset startPosition');
+      this.startPosition = this.lastCurrentTime = 0;
+    }
+
+    // remove video listeners
+    removeEventListener(media, 'seeking', this.onMediaSeeking);
+    removeEventListener(media, 'ended', this.onMediaEnded);
+    if (this.keyLoader && !transferringMedia) {
+      this.keyLoader.detach();
+    }
+    this.media = this.mediaBuffer = null;
+    this.loopSn = undefined;
+    if (transferringMedia) {
+      this.resetLoadingState();
+      this.resetTransmuxer();
+      return;
+    }
+    this.loadingParts = false;
+    this.fragmentTracker.removeAllFragments();
+    this.stopLoad();
+  }
+  onManifestLoading() {
+    this.initPTS = [];
+    this.levels = this.levelLastLoaded = this.fragCurrent = null;
+    this.lastCurrentTime = this.startPosition = 0;
+    this.startFragRequested = false;
+  }
+  onError(event, data) {}
+  onManifestLoaded(event, data) {
+    this.startTimeOffset = data.startTimeOffset;
+  }
+  onHandlerDestroying() {
+    this.stopLoad();
+    if (this.transmuxer) {
+      this.transmuxer.destroy();
+      this.transmuxer = null;
+    }
+    super.onHandlerDestroying();
+    // @ts-ignore
+    this.hls = this.onMediaSeeking = this.onMediaEnded = null;
+  }
+  onHandlerDestroyed() {
+    this.state = State.STOPPED;
+    if (this.fragmentLoader) {
+      this.fragmentLoader.destroy();
+    }
+    if (this.keyLoader) {
+      this.keyLoader.destroy();
+    }
+    if (this.decrypter) {
+      this.decrypter.destroy();
+    }
+    this.hls = this.log = this.warn = this.decrypter = this.keyLoader = this.fragmentLoader = this.fragmentTracker = null;
+    super.onHandlerDestroyed();
+  }
+  loadFragment(frag, level, targetBufferTime) {
+    this.startFragRequested = true;
+    this._loadFragForPlayback(frag, level, targetBufferTime);
+  }
+  _loadFragForPlayback(fragment, level, targetBufferTime) {
+    const progressCallback = data => {
+      const frag = data.frag;
+      if (this.fragContextChanged(frag)) {
+        this.warn(`${frag.type} sn: ${frag.sn}${data.part ? ' part: ' + data.part.index : ''} of ${this.fragInfo(frag, false, data.part)}) was dropped during download.`);
+        this.fragmentTracker.removeFragment(frag);
+        return;
+      }
+      frag.stats.chunkCount++;
+      this._handleFragmentLoadProgress(data);
+    };
+    this._doFragLoad(fragment, level, targetBufferTime, progressCallback).then(data => {
+      if (!data) {
+        // if we're here we probably needed to backtrack or are waiting for more parts
+        return;
+      }
+      const state = this.state;
+      const frag = data.frag;
+      if (this.fragContextChanged(frag)) {
+        if (state === State.FRAG_LOADING || !this.fragCurrent && state === State.PARSING) {
+          this.fragmentTracker.removeFragment(frag);
+          this.state = State.IDLE;
+        }
+        return;
+      }
+      if ('payload' in data) {
+        this.log(`Loaded ${frag.type} sn: ${frag.sn} of ${this.playlistLabel()} ${frag.level}`);
+        this.hls.trigger(Events.FRAG_LOADED, data);
+      }
+
+      // Pass through the whole payload; controllers not implementing progressive loading receive data from this callback
+      this._handleFragmentLoadComplete(data);
+    }).catch(reason => {
+      if (this.state === State.STOPPED || this.state === State.ERROR) {
+        return;
+      }
+      this.warn(`Frag error: ${(reason == null ? void 0 : reason.message) || reason}`);
+      this.resetFragmentLoading(fragment);
+    });
+  }
+  clearTrackerIfNeeded(frag) {
+    var _this$mediaBuffer;
+    const {
+      fragmentTracker
+    } = this;
+    const fragState = fragmentTracker.getState(frag);
+    if (fragState === FragmentState.APPENDING) {
+      // Lower the max buffer length and try again
+      const playlistType = frag.type;
+      const bufferedInfo = this.getFwdBufferInfo(this.mediaBuffer, playlistType);
+      const minForwardBufferLength = Math.max(frag.duration, bufferedInfo ? bufferedInfo.len : this.config.maxBufferLength);
+      // If backtracking, always remove from the tracker without reducing max buffer length
+      const backtrackFragment = this.backtrackFragment;
+      const backtracked = backtrackFragment ? frag.sn - backtrackFragment.sn : 0;
+      if (backtracked === 1 || this.reduceMaxBufferLength(minForwardBufferLength, frag.duration)) {
+        fragmentTracker.removeFragment(frag);
+      }
+    } else if (((_this$mediaBuffer = this.mediaBuffer) == null ? void 0 : _this$mediaBuffer.buffered.length) === 0) {
+      // Stop gap for bad tracker / buffer flush behavior
+      fragmentTracker.removeAllFragments();
+    } else if (fragmentTracker.hasParts(frag.type)) {
+      // In low latency mode, remove fragments for which only some parts were buffered
+      fragmentTracker.detectPartialFragments({
+        frag,
+        part: null,
+        stats: frag.stats,
+        id: frag.type
+      });
+      if (fragmentTracker.getState(frag) === FragmentState.PARTIAL) {
+        fragmentTracker.removeFragment(frag);
+      }
+    }
+  }
+  checkLiveUpdate(details) {
+    if (details.updated && !details.live) {
+      // Live stream ended, update fragment tracker
+      const lastFragment = details.fragments[details.fragments.length - 1];
+      this.fragmentTracker.detectPartialFragments({
+        frag: lastFragment,
+        part: null,
+        stats: lastFragment.stats,
+        id: lastFragment.type
+      });
+    }
+    if (!details.fragments[0]) {
+      details.deltaUpdateFailed = true;
+    }
+  }
+  waitForLive(levelInfo) {
+    const details = levelInfo.details;
+    return (details == null ? void 0 : details.live) && details.type !== 'EVENT' && (this.levelLastLoaded !== levelInfo || details.expired);
+  }
+  flushMainBuffer(startOffset, endOffset, type = null) {
+    if (!(startOffset - endOffset)) {
+      return;
+    }
+    // When alternate audio is playing, the audio-stream-controller is responsible for the audio buffer. Otherwise,
+    // passing a null type flushes both buffers
+    const flushScope = {
+      startOffset,
+      endOffset,
+      type
+    };
+    this.hls.trigger(Events.BUFFER_FLUSHING, flushScope);
+  }
+  _loadInitSegment(fragment, level) {
+    this._doFragLoad(fragment, level).then(data => {
+      const frag = data == null ? void 0 : data.frag;
+      if (!frag || this.fragContextChanged(frag) || !this.levels) {
+        throw new Error('init load aborted');
+      }
+      return data;
+    }).then(data => {
+      const {
+        hls
+      } = this;
+      const {
+        frag,
+        payload
+      } = data;
+      const decryptData = frag.decryptdata;
+
+      // check to see if the payload needs to be decrypted
+      if (payload && payload.byteLength > 0 && decryptData != null && decryptData.key && decryptData.iv && isFullSegmentEncryption(decryptData.method)) {
+        const startTime = self.performance.now();
+        // decrypt init segment data
+        return this.decrypter.decrypt(new Uint8Array(payload), decryptData.key.buffer, decryptData.iv.buffer, getAesModeFromFullSegmentMethod(decryptData.method)).catch(err => {
+          hls.trigger(Events.ERROR, {
+            type: ErrorTypes.MEDIA_ERROR,
+            details: ErrorDetails.FRAG_DECRYPT_ERROR,
+            fatal: false,
+            error: err,
+            reason: err.message,
+            frag
+          });
+          throw err;
+        }).then(decryptedData => {
+          const endTime = self.performance.now();
+          hls.trigger(Events.FRAG_DECRYPTED, {
+            frag,
+            payload: decryptedData,
+            stats: {
+              tstart: startTime,
+              tdecrypt: endTime
+            }
+          });
+          data.payload = decryptedData;
+          return this.completeInitSegmentLoad(data);
+        });
+      }
+      return this.completeInitSegmentLoad(data);
+    }).catch(reason => {
+      if (this.state === State.STOPPED || this.state === State.ERROR) {
+        return;
+      }
+      this.warn(reason);
+      this.resetFragmentLoading(fragment);
+    });
+  }
+  completeInitSegmentLoad(data) {
+    const {
+      levels
+    } = this;
+    if (!levels) {
+      throw new Error('init load aborted, missing levels');
+    }
+    const stats = data.frag.stats;
+    if (this.state !== State.STOPPED) {
+      this.state = State.IDLE;
+    }
+    data.frag.data = new Uint8Array(data.payload);
+    stats.parsing.start = stats.buffering.start = self.performance.now();
+    stats.parsing.end = stats.buffering.end = self.performance.now();
+    this.tick();
+  }
+  unhandledEncryptionError(initSegment, frag) {
+    var _tracks$audio, _tracks$video;
+    const tracks = initSegment.tracks;
+    if (tracks && !frag.encrypted && ((_tracks$audio = tracks.audio) != null && _tracks$audio.encrypted || (_tracks$video = tracks.video) != null && _tracks$video.encrypted) && (!this.config.emeEnabled || !this.keyLoader.emeController)) {
+      const media = this.media;
+      const error = new Error(`Encrypted track with no key in ${this.fragInfo(frag)} (media ${media ? 'attached mediaKeys: ' + media.mediaKeys : 'detached'})` );
+      this.warn(error.message);
+      // Ignore if media is detached or mediaKeys are set
+      if (!media || media.mediaKeys) {
+        return false;
+      }
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.KEY_SYSTEM_ERROR,
+        details: ErrorDetails.KEY_SYSTEM_NO_KEYS,
+        fatal: false,
+        error,
+        frag
+      });
+      this.resetTransmuxer();
+      return true;
+    }
+    return false;
+  }
+  fragContextChanged(frag) {
+    const {
+      fragCurrent
+    } = this;
+    return !frag || !fragCurrent || frag.sn !== fragCurrent.sn || frag.level !== fragCurrent.level;
+  }
+  fragBufferedComplete(frag, part) {
+    const media = this.mediaBuffer ? this.mediaBuffer : this.media;
+    this.log(`Buffered ${frag.type} sn: ${frag.sn}${part ? ' part: ' + part.index : ''} of ${this.fragInfo(frag, false, part)} > buffer:${media ? TimeRanges.toString(BufferHelper.getBuffered(media)) : '(detached)'})`);
+    if (isMediaFragment(frag)) {
+      var _this$levels;
+      if (frag.type !== PlaylistLevelType.SUBTITLE) {
+        const el = frag.elementaryStreams;
+        if (!Object.keys(el).some(type => !!el[type])) {
+          // empty segment
+          this.state = State.IDLE;
+          return;
+        }
+      }
+      const level = (_this$levels = this.levels) == null ? void 0 : _this$levels[frag.level];
+      if (level != null && level.fragmentError) {
+        this.log(`Resetting level fragment error count of ${level.fragmentError} on frag buffered`);
+        level.fragmentError = 0;
+      }
+    }
+    this.state = State.IDLE;
+  }
+  _handleFragmentLoadComplete(fragLoadedEndData) {
+    const {
+      transmuxer
+    } = this;
+    if (!transmuxer) {
+      return;
+    }
+    const {
+      frag,
+      part,
+      partsLoaded
+    } = fragLoadedEndData;
+    // If we did not load parts, or loaded all parts, we have complete (not partial) fragment data
+    const complete = !partsLoaded || partsLoaded.length === 0 || partsLoaded.some(fragLoaded => !fragLoaded);
+    const chunkMeta = new ChunkMetadata(frag.level, frag.sn, frag.stats.chunkCount + 1, 0, part ? part.index : -1, !complete);
+    transmuxer.flush(chunkMeta);
+  }
+  _handleFragmentLoadProgress(frag) {}
+  _doFragLoad(frag, level, targetBufferTime = null, progressCallback) {
+    var _frag$decryptdata;
+    this.fragCurrent = frag;
+    const details = level.details;
+    if (!this.levels || !details) {
+      throw new Error(`frag load aborted, missing level${details ? '' : ' detail'}s`);
+    }
+    let keyLoadingPromise = null;
+    if (frag.encrypted && !((_frag$decryptdata = frag.decryptdata) != null && _frag$decryptdata.key)) {
+      this.log(`Loading key for ${frag.sn} of [${details.startSN}-${details.endSN}], ${this.playlistLabel()} ${frag.level}`);
+      this.state = State.KEY_LOADING;
+      this.fragCurrent = frag;
+      keyLoadingPromise = this.keyLoader.load(frag).then(keyLoadedData => {
+        if (!this.fragContextChanged(keyLoadedData.frag)) {
+          this.hls.trigger(Events.KEY_LOADED, keyLoadedData);
+          if (this.state === State.KEY_LOADING) {
+            this.state = State.IDLE;
+          }
+          return keyLoadedData;
+        }
+      });
+      this.hls.trigger(Events.KEY_LOADING, {
+        frag
+      });
+      if (this.fragCurrent === null) {
+        this.log(`context changed in KEY_LOADING`);
+        return Promise.resolve(null);
+      }
+    } else if (!frag.encrypted) {
+      keyLoadingPromise = this.keyLoader.loadClear(frag, details.encryptedFragments, this.startFragRequested);
+      if (keyLoadingPromise) {
+        this.log(`[eme] blocking frag load until media-keys acquired`);
+      }
+    }
+    const fragPrevious = this.fragPrevious;
+    if (isMediaFragment(frag) && (!fragPrevious || frag.sn !== fragPrevious.sn)) {
+      const shouldLoadParts = this.shouldLoadParts(level.details, frag.end);
+      if (shouldLoadParts !== this.loadingParts) {
+        this.log(`LL-Part loading ${shouldLoadParts ? 'ON' : 'OFF'} loading sn ${fragPrevious == null ? void 0 : fragPrevious.sn}->${frag.sn}`);
+        this.loadingParts = shouldLoadParts;
+      }
+    }
+    targetBufferTime = Math.max(frag.start, targetBufferTime || 0);
+    if (this.loadingParts && isMediaFragment(frag)) {
+      const partList = details.partList;
+      if (partList && progressCallback) {
+        if (targetBufferTime > details.fragmentEnd && details.fragmentHint) {
+          frag = details.fragmentHint;
+        }
+        const partIndex = this.getNextPart(partList, frag, targetBufferTime);
+        if (partIndex > -1) {
+          const part = partList[partIndex];
+          frag = this.fragCurrent = part.fragment;
+          this.log(`Loading ${frag.type} sn: ${frag.sn} part: ${part.index} (${partIndex}/${partList.length - 1}) of ${this.fragInfo(frag, false, part)}) cc: ${frag.cc} [${details.startSN}-${details.endSN}], target: ${parseFloat(targetBufferTime.toFixed(3))}`);
+          this.nextLoadPosition = part.start + part.duration;
+          this.state = State.FRAG_LOADING;
+          let _result;
+          if (keyLoadingPromise) {
+            _result = keyLoadingPromise.then(keyLoadedData => {
+              if (!keyLoadedData || this.fragContextChanged(keyLoadedData.frag)) {
+                return null;
+              }
+              return this.doFragPartsLoad(frag, part, level, progressCallback);
+            }).catch(error => this.handleFragLoadError(error));
+          } else {
+            _result = this.doFragPartsLoad(frag, part, level, progressCallback).catch(error => this.handleFragLoadError(error));
+          }
+          this.hls.trigger(Events.FRAG_LOADING, {
+            frag,
+            part,
+            targetBufferTime
+          });
+          if (this.fragCurrent === null) {
+            return Promise.reject(new Error(`frag load aborted, context changed in FRAG_LOADING parts`));
+          }
+          return _result;
+        } else if (!frag.url || this.loadedEndOfParts(partList, targetBufferTime)) {
+          // Fragment hint has no parts
+          return Promise.resolve(null);
+        }
+      }
+    }
+    if (isMediaFragment(frag) && this.loadingParts) {
+      var _details$partList;
+      this.log(`LL-Part loading OFF after next part miss @${targetBufferTime.toFixed(2)} Check buffer at sn: ${frag.sn} loaded parts: ${(_details$partList = details.partList) == null ? void 0 : _details$partList.filter(p => p.loaded).map(p => `[${p.start}-${p.end}]`)}`);
+      this.loadingParts = false;
+    } else if (!frag.url) {
+      // Selected fragment hint for part but not loading parts
+      return Promise.resolve(null);
+    }
+    this.log(`Loading ${frag.type} sn: ${frag.sn} of ${this.fragInfo(frag, false)}) cc: ${frag.cc} ${'[' + details.startSN + '-' + details.endSN + ']'}, target: ${parseFloat(targetBufferTime.toFixed(3))}`);
+    // Don't update nextLoadPosition for fragments which are not buffered
+    if (isFiniteNumber(frag.sn) && !this.bitrateTest) {
+      this.nextLoadPosition = frag.start + frag.duration;
+    }
+    this.state = State.FRAG_LOADING;
+
+    // Load key before streaming fragment data
+    const dataOnProgress = this.config.progressive && frag.type !== PlaylistLevelType.SUBTITLE;
+    let result;
+    if (dataOnProgress && keyLoadingPromise) {
+      result = keyLoadingPromise.then(keyLoadedData => {
+        if (!keyLoadedData || this.fragContextChanged(keyLoadedData.frag)) {
+          return null;
+        }
+        return this.fragmentLoader.load(frag, progressCallback);
+      }).catch(error => this.handleFragLoadError(error));
+    } else {
+      // load unencrypted fragment data with progress event,
+      // or handle fragment result after key and fragment are finished loading
+      result = Promise.all([this.fragmentLoader.load(frag, dataOnProgress ? progressCallback : undefined), keyLoadingPromise]).then(([fragLoadedData]) => {
+        if (!dataOnProgress && progressCallback) {
+          progressCallback(fragLoadedData);
+        }
+        return fragLoadedData;
+      }).catch(error => this.handleFragLoadError(error));
+    }
+    this.hls.trigger(Events.FRAG_LOADING, {
+      frag,
+      targetBufferTime
+    });
+    if (this.fragCurrent === null) {
+      return Promise.reject(new Error(`frag load aborted, context changed in FRAG_LOADING`));
+    }
+    return result;
+  }
+  doFragPartsLoad(frag, fromPart, level, progressCallback) {
+    return new Promise((resolve, reject) => {
+      var _level$details;
+      const partsLoaded = [];
+      const initialPartList = (_level$details = level.details) == null ? void 0 : _level$details.partList;
+      const loadPart = part => {
+        this.fragmentLoader.loadPart(frag, part, progressCallback).then(partLoadedData => {
+          partsLoaded[part.index] = partLoadedData;
+          const loadedPart = partLoadedData.part;
+          this.hls.trigger(Events.FRAG_LOADED, partLoadedData);
+          const nextPart = getPartWith(level.details, frag.sn, part.index + 1) || findPart(initialPartList, frag.sn, part.index + 1);
+          if (nextPart) {
+            loadPart(nextPart);
+          } else {
+            return resolve({
+              frag,
+              part: loadedPart,
+              partsLoaded
+            });
+          }
+        }).catch(reject);
+      };
+      loadPart(fromPart);
+    });
+  }
+  handleFragLoadError(error) {
+    if ('data' in error) {
+      const data = error.data;
+      if (data.frag && data.details === ErrorDetails.INTERNAL_ABORTED) {
+        this.handleFragLoadAborted(data.frag, data.part);
+      } else if (data.frag && data.type === ErrorTypes.KEY_SYSTEM_ERROR) {
+        data.frag.abortRequests();
+        this.resetStartWhenNotLoaded();
+        this.resetFragmentLoading(data.frag);
+      } else {
+        this.hls.trigger(Events.ERROR, data);
+      }
+    } else {
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.INTERNAL_EXCEPTION,
+        err: error,
+        error,
+        fatal: true
+      });
+    }
+    return null;
+  }
+  _handleTransmuxerFlush(chunkMeta) {
+    const context = this.getCurrentContext(chunkMeta);
+    if (!context || this.state !== State.PARSING) {
+      if (!this.fragCurrent && this.state !== State.STOPPED && this.state !== State.ERROR) {
+        this.state = State.IDLE;
+      }
+      return;
+    }
+    const {
+      frag,
+      part,
+      level
+    } = context;
+    const now = self.performance.now();
+    frag.stats.parsing.end = now;
+    if (part) {
+      part.stats.parsing.end = now;
+    }
+    // See if part loading should be disabled/enabled based on buffer and playback position.
+    const levelDetails = this.getLevelDetails();
+    const loadingPartsAtEdge = levelDetails && frag.sn > levelDetails.endSN;
+    const shouldLoadParts = loadingPartsAtEdge || this.shouldLoadParts(levelDetails, frag.end);
+    if (shouldLoadParts !== this.loadingParts) {
+      this.log(`LL-Part loading ${shouldLoadParts ? 'ON' : 'OFF'} after parsing segment ending @${frag.end.toFixed(2)}`);
+      this.loadingParts = shouldLoadParts;
+    }
+    this.updateLevelTiming(frag, part, level, chunkMeta.partial);
+  }
+  shouldLoadParts(details, bufferEnd) {
+    if (this.config.lowLatencyMode) {
+      if (!details) {
+        return this.loadingParts;
+      }
+      if (details.partList) {
+        var _details$fragmentHint;
+        // Buffer must be ahead of first part + duration of parts after last segment
+        // and playback must be at or past segment adjacent to part list
+        const firstPart = details.partList[0];
+        // Loading of VTT subtitle parts is not implemented in subtitle-stream-controller (#7460)
+        if (firstPart.fragment.type === PlaylistLevelType.SUBTITLE) {
+          return false;
+        }
+        const safePartStart = firstPart.end + (((_details$fragmentHint = details.fragmentHint) == null ? void 0 : _details$fragmentHint.duration) || 0);
+        if (bufferEnd >= safePartStart) {
+          var _this$media;
+          const playhead = this.hls.hasEnoughToStart ? ((_this$media = this.media) == null ? void 0 : _this$media.currentTime) || this.lastCurrentTime : this.getLoadPosition();
+          if (playhead > firstPart.start - firstPart.fragment.duration) {
+            return true;
+          }
+        }
+      }
+    }
+    return false;
+  }
+  getCurrentContext(chunkMeta) {
+    const {
+      levels,
+      fragCurrent
+    } = this;
+    const {
+      level: levelIndex,
+      sn,
+      part: partIndex
+    } = chunkMeta;
+    if (!(levels != null && levels[levelIndex])) {
+      this.warn(`Levels object was unset while buffering fragment ${sn} of ${this.playlistLabel()} ${levelIndex}. The current chunk will not be buffered.`);
+      return null;
+    }
+    const level = levels[levelIndex];
+    const levelDetails = level.details;
+    const part = partIndex > -1 ? getPartWith(levelDetails, sn, partIndex) : null;
+    const frag = part ? part.fragment : getFragmentWithSN(levelDetails, sn, fragCurrent);
+    if (!frag) {
+      return null;
+    }
+    if (fragCurrent && fragCurrent !== frag) {
+      frag.stats = fragCurrent.stats;
+    }
+    return {
+      frag,
+      part,
+      level
+    };
+  }
+  bufferFragmentData(data, frag, part, chunkMeta, noBacktracking) {
+    if (this.state !== State.PARSING) {
+      return;
+    }
+    const {
+      data1,
+      data2
+    } = data;
+    let buffer = data1;
+    if (data2) {
+      // Combine the moof + mdat so that we buffer with a single append
+      buffer = appendUint8Array(data1, data2);
+    }
+    if (!buffer.length) {
+      return;
+    }
+    const offsetTimestamp = this.initPTS[frag.cc];
+    const offset = offsetTimestamp ? -offsetTimestamp.baseTime / offsetTimestamp.timescale : undefined;
+    const segment = {
+      type: data.type,
+      frag,
+      part,
+      chunkMeta,
+      offset,
+      parent: frag.type,
+      data: buffer
+    };
+    this.hls.trigger(Events.BUFFER_APPENDING, segment);
+    if (data.dropped && data.independent && !part) {
+      if (noBacktracking) {
+        return;
+      }
+      // Clear buffer so that we reload previous segments sequentially if required
+      this.flushBufferGap(frag);
+    }
+  }
+  flushBufferGap(frag) {
+    const media = this.media;
+    if (!media) {
+      return;
+    }
+    // If currentTime is not buffered, clear the back buffer so that we can backtrack as much as needed
+    if (!BufferHelper.isBuffered(media, media.currentTime)) {
+      this.flushMainBuffer(0, frag.start);
+      return;
+    }
+    // Remove back-buffer without interrupting playback to allow back tracking
+    const currentTime = media.currentTime;
+    const bufferInfo = BufferHelper.bufferInfo(media, currentTime, 0);
+    const fragDuration = frag.duration;
+    const segmentFraction = Math.min(this.config.maxFragLookUpTolerance * 2, fragDuration * 0.25);
+    const start = Math.max(Math.min(frag.start - segmentFraction, bufferInfo.end - segmentFraction), currentTime + segmentFraction);
+    if (frag.start - start > segmentFraction) {
+      this.flushMainBuffer(start, frag.start);
+    }
+  }
+  getFwdBufferInfo(bufferable, type) {
+    var _this$media2;
+    const pos = this.getLoadPosition();
+    if (!isFiniteNumber(pos)) {
+      return null;
+    }
+    const backwardSeek = this.lastCurrentTime > pos;
+    const maxBufferHole = backwardSeek || (_this$media2 = this.media) != null && _this$media2.paused ? 0 : this.config.maxBufferHole;
+    return this.getFwdBufferInfoAtPos(bufferable, pos, type, maxBufferHole);
+  }
+  getFwdBufferInfoAtPos(bufferable, pos, type, maxBufferHole) {
+    const bufferInfo = BufferHelper.bufferInfo(bufferable, pos, maxBufferHole);
+    // Workaround flaw in getting forward buffer when maxBufferHole is smaller than gap at current pos
+    if (bufferInfo.len === 0 && bufferInfo.nextStart !== undefined) {
+      const bufferedFragAtPos = this.fragmentTracker.getBufferedFrag(pos, type);
+      if (bufferedFragAtPos && (bufferInfo.nextStart <= bufferedFragAtPos.end || bufferedFragAtPos.gap)) {
+        const gapDuration = Math.max(Math.min(bufferInfo.nextStart, bufferedFragAtPos.end) - pos, maxBufferHole);
+        return BufferHelper.bufferInfo(bufferable, pos, gapDuration);
+      }
+    }
+    return bufferInfo;
+  }
+  getMaxBufferLength(levelBitrate) {
+    const {
+      config
+    } = this;
+    let maxBufLen;
+    if (levelBitrate) {
+      maxBufLen = Math.max(8 * config.maxBufferSize / levelBitrate, config.maxBufferLength);
+    } else {
+      maxBufLen = config.maxBufferLength;
+    }
+    return Math.min(maxBufLen, config.maxMaxBufferLength);
+  }
+  exceedsMaxBuffer(bufferInfo, maxBufLen, selected) {
+    const nextStart = bufferInfo.nextStart;
+    if (nextStart && selected.start > nextStart) {
+      const bufferedRanges = bufferInfo.buffered;
+      if (bufferedRanges) {
+        let fullBufferLength = bufferInfo.len;
+        const bufferedIndex = bufferInfo.bufferedIndex;
+        for (let i = bufferedRanges.length - 1; i > bufferedIndex; i--) {
+          if (bufferedRanges[i].start < selected.start) {
+            fullBufferLength += bufferedRanges[i].end - bufferedRanges[i].start;
+          }
+        }
+        return fullBufferLength >= maxBufLen;
+      }
+    }
+    return false;
+  }
+  reduceMaxBufferLength(threshold, fragDuration) {
+    const config = this.config;
+    const minLength = Math.max(Math.min(threshold - fragDuration, config.maxBufferLength), fragDuration);
+    const reducedLength = Math.max(threshold - fragDuration * 3, config.maxMaxBufferLength / 2, minLength);
+    if (reducedLength >= minLength) {
+      // reduce max buffer length as it might be too high. we do this to avoid loop flushing ...
+      config.maxMaxBufferLength = reducedLength;
+      this.warn(`Reduce max buffer length to ${reducedLength}s`);
+      return true;
+    }
+    return false;
+  }
+  getAppendedFrag(position, playlistType = PlaylistLevelType.MAIN) {
+    const fragOrPart = this.fragmentTracker ? this.fragmentTracker.getAppendedFrag(position, playlistType) : null;
+    if (fragOrPart && 'fragment' in fragOrPart) {
+      return fragOrPart.fragment;
+    }
+    return fragOrPart;
+  }
+  getNextFragment(pos, levelDetails) {
+    const fragments = levelDetails.fragments;
+    const fragLen = fragments.length;
+    if (!fragLen) {
+      return null;
+    }
+
+    // find fragment index, contiguous with end of buffer position
+    const {
+      config
+    } = this;
+    const playlistStart = levelDetails.fragmentStart;
+    const canLoadParts = config.lowLatencyMode && !!levelDetails.partList;
+    let frag = null;
+    if (levelDetails.live) {
+      const initialLiveManifestSize = config.initialLiveManifestSize;
+      if (fragLen < initialLiveManifestSize) {
+        this.warn(`Not enough fragments to start playback (have: ${fragLen}, need: ${initialLiveManifestSize})`);
+        return null;
+      }
+      // The real fragment start times for a live stream are only known after the PTS range for that level is known.
+      // In order to discover the range, we load the best matching fragment for that level and demux it.
+      // Do not load using live logic if the starting frag is requested - we want to use getFragmentAtPosition() so that
+      // we get the fragment matching that start time
+      if (!levelDetails.PTSKnown && !this.startFragRequested && this.startPosition === -1 || pos < playlistStart) {
+        var _frag;
+        if (canLoadParts && !this.loadingParts) {
+          this.log(`LL-Part loading ON for initial live fragment`);
+          this.loadingParts = true;
+        }
+        frag = this.getInitialLiveFragment(levelDetails);
+        const configValue = this.config.startPosition;
+        const mainStart = this.hls.startPosition;
+        const liveSyncPosition = this.hls.liveSyncPosition;
+        const fragStart = ((_frag = frag) == null ? void 0 : _frag.start) || 0;
+        let startPosition;
+        let reason;
+        if (mainStart !== -1 && mainStart >= playlistStart) {
+          startPosition = mainStart;
+          reason = mainStart === configValue ? 'config' : 'next load start';
+        } else if (liveSyncPosition !== null) {
+          startPosition = liveSyncPosition;
+          reason = 'live edge';
+        } else {
+          startPosition = pos;
+          reason = 'buffer pos';
+        }
+        if (startPosition < fragStart) {
+          startPosition = fragStart;
+          reason = 'live frag start';
+        }
+        if (startPosition < playlistStart) {
+          startPosition = playlistStart;
+          reason = 'playlist start';
+        }
+        if (this.startPosition != startPosition || this.nextLoadPosition != startPosition) {
+          this.log(`Setting startPosition to ${startPosition.toFixed(3)} ${mainStart === -1 ? '' : `(from ${configValue}) `}based on ${reason}. live edge: ${liveSyncPosition} live frag start: ${fragStart.toFixed(3)} playlist start: ${playlistStart.toFixed(3)} buffer pos: ${pos}`);
+          this.startPosition = this.nextLoadPosition = startPosition;
+        }
+      }
+    } else if (pos <= playlistStart) {
+      // VoD playlist: if loadPosition before start of playlist, load first fragment
+      frag = fragments[0];
+    }
+
+    // If we haven't run into any special cases already, just load the fragment most closely matching the requested position
+    if (!frag) {
+      const end = this.loadingParts ? levelDetails.partEnd : levelDetails.fragmentEnd;
+      frag = this.getFragmentAtPosition(pos, end, levelDetails);
+    }
+    let programFrag = this.filterReplacedPrimary(frag, levelDetails);
+    if (!programFrag && frag) {
+      const curSNIdx = frag.sn - levelDetails.startSN;
+      programFrag = this.filterReplacedPrimary(fragments[curSNIdx + 1] || null, levelDetails);
+    }
+    return this.mapToInitFragWhenRequired(programFrag);
+  }
+  isLoopLoading(frag, targetBufferTime) {
+    if (this.nextLoadPosition <= targetBufferTime) {
+      return false;
+    }
+    const trackerState = this.fragmentTracker.getState(frag);
+    return trackerState === FragmentState.OK || trackerState === FragmentState.PARTIAL && !!frag.gap;
+  }
+  getNextFragmentLoopLoading(frag, levelDetails, bufferInfo, playlistType, maxBufLen) {
+    let nextFragment = null;
+    if (frag.gap) {
+      nextFragment = this.getNextFragment(this.nextLoadPosition, levelDetails);
+      if (nextFragment && !nextFragment.gap && bufferInfo.nextStart) {
+        // Media buffered after GAP tags should not make the next buffer timerange exceed forward buffer length
+        const nextbufferInfo = this.getFwdBufferInfoAtPos(this.mediaBuffer ? this.mediaBuffer : this.media, bufferInfo.nextStart, playlistType, 0);
+        if (nextbufferInfo !== null && bufferInfo.len + nextbufferInfo.len >= maxBufLen) {
+          // Returning here might result in not finding an audio and video candiate to skip to
+          const sn = nextFragment.sn;
+          if (this.loopSn !== sn) {
+            this.log(`buffer full after gaps in "${playlistType}" playlist starting at sn: ${sn}`);
+            this.loopSn = sn;
+          }
+          return null;
+        }
+      }
+    }
+    this.loopSn = undefined;
+    return nextFragment;
+  }
+  get primaryPrefetch() {
+    if (interstitialsEnabled(this.config)) {
+      var _this$hls$interstitia;
+      const playingInterstitial = (_this$hls$interstitia = this.hls.interstitialsManager) == null || (_this$hls$interstitia = _this$hls$interstitia.playingItem) == null ? void 0 : _this$hls$interstitia.event;
+      if (playingInterstitial) {
+        return true;
+      }
+    }
+    return false;
+  }
+  filterReplacedPrimary(frag, details) {
+    if (!frag) {
+      return frag;
+    }
+    if (interstitialsEnabled(this.config) && frag.type !== PlaylistLevelType.SUBTITLE) {
+      // Do not load fragments outside the buffering schedule segment
+      const interstitials = this.hls.interstitialsManager;
+      const bufferingItem = interstitials == null ? void 0 : interstitials.bufferingItem;
+      if (bufferingItem) {
+        const bufferingInterstitial = bufferingItem.event;
+        if (bufferingInterstitial) {
+          // Do not stream fragments while buffering Interstitial Events (except for overlap at the start)
+          if (bufferingInterstitial.appendInPlace || Math.abs(frag.start - bufferingItem.start) > 1 || bufferingItem.start === 0) {
+            return null;
+          }
+        } else {
+          // Limit fragment loading to media in schedule item
+          if (frag.end <= bufferingItem.start && (details == null ? void 0 : details.live) === false) {
+            // fragment ends by schedule item start
+            // this.fragmentTracker.fragBuffered(frag, true);
+            return null;
+          }
+          if (frag.start > bufferingItem.end && bufferingItem.nextEvent) {
+            // fragment is past schedule item end
+            // allow some overflow when not appending in place to prevent stalls
+            if (bufferingItem.nextEvent.appendInPlace || frag.start - bufferingItem.end > 1) {
+              return null;
+            }
+          }
+        }
+      }
+      // Skip loading of fragments that overlap completely with appendInPlace interstitials
+      const playerQueue = interstitials == null ? void 0 : interstitials.playerQueue;
+      if (playerQueue) {
+        for (let i = playerQueue.length; i--;) {
+          const interstitial = playerQueue[i].interstitial;
+          if (interstitial.appendInPlace && frag.start >= interstitial.startTime && frag.end <= interstitial.resumeTime) {
+            return null;
+          }
+        }
+      }
+    }
+    return frag;
+  }
+  mapToInitFragWhenRequired(frag) {
+    // If an initSegment is present, it must be buffered first
+    if (frag != null && frag.initSegment && !frag.initSegment.data && !this.bitrateTest) {
+      return frag.initSegment;
+    }
+    return frag;
+  }
+  getNextPart(partList, frag, targetBufferTime) {
+    let nextPart = -1;
+    let contiguous = false;
+    let independentAttrOmitted = true;
+    for (let i = 0, len = partList.length; i < len; i++) {
+      const part = partList[i];
+      independentAttrOmitted = independentAttrOmitted && !part.independent;
+      if (nextPart > -1 && targetBufferTime < part.start) {
+        break;
+      }
+      const loaded = part.loaded;
+      if (loaded) {
+        nextPart = -1;
+      } else if (contiguous || (part.independent || independentAttrOmitted) && part.fragment === frag) {
+        if (part.fragment !== frag) {
+          this.warn(`Need buffer at ${targetBufferTime} but next unloaded part starts at ${part.start}`);
+        }
+        nextPart = i;
+      }
+      contiguous = loaded;
+    }
+    return nextPart;
+  }
+  loadedEndOfParts(partList, targetBufferTime) {
+    let part;
+    for (let i = partList.length; i--;) {
+      part = partList[i];
+      if (!part.loaded) {
+        return false;
+      }
+      if (targetBufferTime > part.start) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /*
+   This method is used find the best matching first fragment for a live playlist. This fragment is used to calculate the
+   "sliding" of the playlist, which is its offset from the start of playback. After sliding we can compute the real
+   start and end times for each fragment in the playlist (after which this method will not need to be called).
+  */
+  getInitialLiveFragment(levelDetails) {
+    const fragments = levelDetails.fragments;
+    const fragPrevious = this.fragPrevious;
+    let frag = null;
+    if (fragPrevious) {
+      if (levelDetails.hasProgramDateTime) {
+        // Prefer using PDT, because it can be accurate enough to choose the correct fragment without knowing the level sliding
+        frag = findFragmentByPDT(fragments, fragPrevious.endProgramDateTime, this.config.maxFragLookUpTolerance);
+        if (frag) {
+          this.log(`Live playlist, switching playlist, load frag with same PDT: ${fragPrevious.programDateTime}`);
+        }
+      }
+      if (!frag) {
+        // SN does not need to be accurate between renditions, but depending on the packaging it may be so.
+        const targetSN = fragPrevious.sn + 1;
+        if (targetSN >= levelDetails.startSN && targetSN <= levelDetails.endSN) {
+          const fragNext = fragments[targetSN - levelDetails.startSN];
+          // Ensure that we're staying within the continuity range, since PTS resets upon a new range
+          if (fragPrevious.cc === fragNext.cc) {
+            frag = fragNext;
+            this.log(`Live playlist, switching playlist, load frag with next SN: ${frag.sn}`);
+          }
+        }
+        // It's important to stay within the continuity range if available; otherwise the fragments in the playlist
+        // will have the wrong start times
+        if (!frag) {
+          frag = findNearestWithCC(levelDetails, fragPrevious.cc, fragPrevious.end);
+          if (frag) {
+            this.log(`Live playlist, switching playlist, load frag with same CC: ${frag.sn}`);
+          }
+        }
+      }
+    } else {
+      // Find a new start fragment when fragPrevious is null
+      const liveStart = this.hls.liveSyncPosition;
+      if (liveStart !== null) {
+        frag = this.getFragmentAtPosition(liveStart, this.bitrateTest ? levelDetails.fragmentEnd : levelDetails.edge, levelDetails);
+      }
+    }
+    return frag;
+  }
+
+  /*
+  This method finds the best matching fragment given the provided position.
+   */
+  getFragmentAtPosition(bufferEnd, end, levelDetails) {
+    const {
+      config
+    } = this;
+    let {
+      fragPrevious
+    } = this;
+    let {
+      fragments,
+      endSN
+    } = levelDetails;
+    const {
+      fragmentHint
+    } = levelDetails;
+    const {
+      maxFragLookUpTolerance
+    } = config;
+    const partList = levelDetails.partList;
+    const loadingParts = !!(this.loadingParts && partList != null && partList.length && fragmentHint);
+    if (loadingParts && !this.bitrateTest && partList[partList.length - 1].fragment.sn === fragmentHint.sn) {
+      // Include incomplete fragment with parts at end
+      fragments = fragments.concat(fragmentHint);
+      endSN = fragmentHint.sn;
+    }
+    let frag;
+    if (bufferEnd < end) {
+      var _this$media3;
+      const backwardSeek = bufferEnd < this.lastCurrentTime;
+      const lookupTolerance = backwardSeek || bufferEnd > end - maxFragLookUpTolerance || (_this$media3 = this.media) != null && _this$media3.paused || !this.startFragRequested ? 0 : maxFragLookUpTolerance;
+      // Remove the tolerance if it would put the bufferEnd past the actual end of stream
+      // Uses buffer and sequence number to calculate switch segment (required if using EXT-X-DISCONTINUITY-SEQUENCE)
+      frag = findFragmentByPTS(fragPrevious, fragments, bufferEnd, lookupTolerance);
+    } else {
+      // reach end of playlist
+      frag = fragments[fragments.length - 1];
+    }
+    if (frag) {
+      const curSNIdx = frag.sn - levelDetails.startSN;
+      // Move fragPrevious forward to support forcing the next fragment to load
+      // when the buffer catches up to a previously buffered range.
+      const fragState = this.fragmentTracker.getState(frag);
+      if (fragState === FragmentState.OK || fragState === FragmentState.PARTIAL && frag.gap) {
+        fragPrevious = frag;
+      }
+      if (fragPrevious && frag.sn === fragPrevious.sn && (!loadingParts || partList[0].fragment.sn > frag.sn || !levelDetails.live)) {
+        // Force the next fragment to load if the previous one was already selected. This can occasionally happen with
+        // non-uniform fragment durations
+        const sameLevel = frag.level === fragPrevious.level;
+        if (sameLevel) {
+          const nextFrag = fragments[curSNIdx + 1];
+          if (frag.sn < endSN && this.fragmentTracker.getState(nextFrag) !== FragmentState.OK) {
+            frag = nextFrag;
+          } else {
+            frag = null;
+          }
+        }
+      }
+    }
+    return frag;
+  }
+  alignPlaylists(details, previousDetails, switchDetails) {
+    // TODO: If not for `shouldAlignOnDiscontinuities` requiring fragPrevious.cc,
+    //  this could all go in level-helper mergeDetails()
+    const length = details.fragments.length;
+    if (!length) {
+      this.warn(`No fragments in live playlist`);
+      return 0;
+    }
+    const slidingStart = details.fragmentStart;
+    const firstLevelLoad = !previousDetails;
+    const aligned = details.alignedSliding && isFiniteNumber(slidingStart);
+    if (firstLevelLoad || !aligned && !slidingStart) {
+      alignStream(switchDetails, details);
+      const alignedSlidingStart = details.fragmentStart;
+      this.log(`Live playlist sliding: ${alignedSlidingStart.toFixed(2)} start-sn: ${previousDetails ? previousDetails.startSN : 'na'}->${details.startSN} fragments: ${length}`);
+      return alignedSlidingStart;
+    }
+    return slidingStart;
+  }
+  waitForCdnTuneIn(details) {
+    // Wait for Low-Latency CDN Tune-in to get an updated playlist
+    const advancePartLimit = 3;
+    return details.live && details.canBlockReload && details.partTarget && details.tuneInGoal > Math.max(details.partHoldBack, details.partTarget * advancePartLimit);
+  }
+  setStartPosition(details, sliding) {
+    // compute start position if set to -1. use it straight away if value is defined
+    let startPosition = this.startPosition;
+    if (startPosition < sliding) {
+      startPosition = -1;
+    }
+    const timelineOffset = this.timelineOffset;
+    if (startPosition === -1) {
+      // Use Playlist EXT-X-START:TIME-OFFSET when set
+      // Prioritize Multivariant Playlist offset so that main, audio, and subtitle stream-controller start times match
+      const offsetInMultivariantPlaylist = this.startTimeOffset !== null;
+      const startTimeOffset = offsetInMultivariantPlaylist ? this.startTimeOffset : details.startTimeOffset;
+      if (startTimeOffset !== null && isFiniteNumber(startTimeOffset)) {
+        startPosition = sliding + startTimeOffset;
+        if (startTimeOffset < 0) {
+          startPosition += details.edge;
+        }
+        startPosition = Math.min(Math.max(sliding, startPosition), sliding + details.totalduration);
+        this.log(`Setting startPosition to ${startPosition} for start time offset ${startTimeOffset} found in ${offsetInMultivariantPlaylist ? 'multivariant' : 'media'} playlist`);
+        this.startPosition = startPosition;
+      } else if (details.live) {
+        // Leave this.startPosition at -1, so that we can use `getInitialLiveFragment` logic when startPosition has
+        // not been specified via the config or an as an argument to startLoad (#3736).
+        startPosition = this.hls.liveSyncPosition || sliding;
+        this.log(`Setting startPosition to -1 to start at live edge ${startPosition}`);
+        this.startPosition = -1;
+      } else {
+        this.log(`setting startPosition to 0 by default`);
+        this.startPosition = startPosition = 0;
+      }
+      this.lastCurrentTime = startPosition + timelineOffset;
+    }
+    this.nextLoadPosition = startPosition + timelineOffset;
+  }
+  getLoadPosition() {
+    var _this$hls;
+    const {
+      media
+    } = this;
+    // if we have not yet loaded any fragment, start loading from start position
+    let pos = 0;
+    if ((_this$hls = this.hls) != null && _this$hls.hasEnoughToStart && media) {
+      pos = media.currentTime;
+    } else if (this.nextLoadPosition >= 0) {
+      pos = this.nextLoadPosition;
+    }
+    return pos;
+  }
+  handleFragLoadAborted(frag, part) {
+    if (this.transmuxer && frag.type === this.playlistType && isMediaFragment(frag) && frag.stats.aborted) {
+      this.log(`Fragment ${frag.sn}${part ? ' part ' + part.index : ''} of ${this.playlistLabel()} ${frag.level} was aborted`);
+      this.resetFragmentLoading(frag);
+    }
+  }
+  resetFragmentLoading(frag) {
+    if (!this.fragCurrent || !this.fragContextChanged(frag) && this.state !== State.FRAG_LOADING_WAITING_RETRY) {
+      this.state = State.IDLE;
+    }
+  }
+  onFragmentOrKeyLoadError(filterType, data) {
+    var _this$hls$latestLevel;
+    if (data.chunkMeta && !data.frag) {
+      const context = this.getCurrentContext(data.chunkMeta);
+      if (context) {
+        data.frag = context.frag;
+      }
+    }
+    const frag = data.frag;
+    // Handle frag error related to caller's filterType
+    if (!frag || frag.type !== filterType || !this.levels) {
+      return;
+    }
+    if (this.fragContextChanged(frag)) {
+      var _this$fragCurrent;
+      this.warn(`Frag load error must match current frag to retry ${frag.url} > ${(_this$fragCurrent = this.fragCurrent) == null ? void 0 : _this$fragCurrent.url}`);
+      return;
+    }
+    const gapTagEncountered = data.details === ErrorDetails.FRAG_GAP;
+    if (gapTagEncountered) {
+      this.fragmentTracker.fragBuffered(frag, true);
+    }
+    // keep retrying until the limit will be reached
+    const errorAction = data.errorAction;
+    if (!errorAction) {
+      this.state = State.ERROR;
+      return;
+    }
+    const {
+      action,
+      flags,
+      retryCount = 0,
+      retryConfig
+    } = errorAction;
+    const couldRetry = !!retryConfig;
+    const retry = couldRetry && action === NetworkErrorAction.RetryRequest;
+    const noAlternate = couldRetry && !errorAction.resolved && flags === ErrorActionFlags.MoveAllAlternatesMatchingHost;
+    const live = (_this$hls$latestLevel = this.hls.latestLevelDetails) == null ? void 0 : _this$hls$latestLevel.live;
+    if (!retry && noAlternate && isMediaFragment(frag) && !frag.endList && live && !isUnusableKeyError(data)) {
+      this.resetFragmentErrors(filterType);
+      this.treatAsGap(frag);
+      errorAction.resolved = true;
+    } else if ((retry || noAlternate) && retryCount < retryConfig.maxNumRetry) {
+      var _data$response;
+      const offlineStatus = offlineHttpStatus((_data$response = data.response) == null ? void 0 : _data$response.code);
+      const delay = getRetryDelay(retryConfig, retryCount);
+      this.resetStartWhenNotLoaded();
+      this.retryDate = self.performance.now() + delay;
+      this.state = State.FRAG_LOADING_WAITING_RETRY;
+      errorAction.resolved = true;
+      if (offlineStatus) {
+        this.log(`Waiting for connection (offline)`);
+        this.retryDate = Infinity;
+        data.reason = 'offline';
+        return;
+      }
+      this.warn(`Fragment ${frag.sn} of ${filterType} ${frag.level} errored with ${data.details}, retrying loading ${retryCount + 1}/${retryConfig.maxNumRetry} in ${delay}ms`);
+    } else if (retryConfig) {
+      this.resetFragmentErrors(filterType);
+      if (retryCount < retryConfig.maxNumRetry) {
+        // Network retry is skipped when level switch is preferred
+        if (!gapTagEncountered && action !== NetworkErrorAction.RemoveAlternatePermanently) {
+          errorAction.resolved = true;
+        }
+      } else {
+        this.warn(`${data.details} reached or exceeded max retry (${retryCount})`);
+        return;
+      }
+    } else if (action === NetworkErrorAction.SendAlternateToPenaltyBox) {
+      this.state = State.WAITING_LEVEL;
+    } else {
+      this.state = State.ERROR;
+    }
+    // Perform next async tick sooner to speed up error action resolution
+    this.tickImmediate();
+  }
+  checkRetryDate() {
+    const now = self.performance.now();
+    const retryDate = this.retryDate;
+    // if current time is gt than retryDate, or if media seeking let's switch to IDLE state to retry loading
+    const waitingForConnection = retryDate === Infinity;
+    if (!retryDate || now >= retryDate || waitingForConnection && !offlineHttpStatus(0)) {
+      if (waitingForConnection) {
+        this.log(`Connection restored (online)`);
+      }
+      this.resetStartWhenNotLoaded();
+      this.state = State.IDLE;
+    }
+  }
+  reduceLengthAndFlushBuffer(data) {
+    // if in appending state
+    if (this.state === State.PARSING || this.state === State.PARSED) {
+      const frag = data.frag;
+      const playlistType = data.parent;
+      const bufferedInfo = this.getFwdBufferInfo(this.mediaBuffer, playlistType);
+      // 0.5 : tolerance needed as some browsers stalls playback before reaching buffered end
+      // reduce max buf len if current position is buffered
+      const buffered = bufferedInfo && bufferedInfo.len > 0.5;
+      if (buffered) {
+        this.reduceMaxBufferLength(bufferedInfo.len, (frag == null ? void 0 : frag.duration) || 10);
+      }
+      const flushBuffer = !buffered;
+      if (flushBuffer) {
+        // current position is not buffered, but browser is still complaining about buffer full error
+        // this happens on IE/Edge, refer to https://github.com/video-dev/hls.js/pull/708
+        // in that case flush the whole audio buffer to recover
+        this.warn(`Buffer full error while media.currentTime (${this.getLoadPosition()}) is not buffered, flush ${playlistType} buffer`);
+      }
+      if (frag) {
+        this.fragmentTracker.removeFragment(frag);
+        this.nextLoadPosition = frag.start;
+      }
+      this.resetLoadingState();
+      return flushBuffer;
+    }
+    return false;
+  }
+  resetFragmentErrors(filterType) {
+    if (filterType === PlaylistLevelType.AUDIO) {
+      // Reset current fragment since audio track audio is essential and may not have a fail-over track
+      this.fragCurrent = null;
+    }
+    // Fragment errors that result in a level switch or redundant fail-over
+    // should reset the stream controller state to idle
+    if (!this.hls.hasEnoughToStart) {
+      this.startFragRequested = false;
+    }
+    if (this.state !== State.STOPPED) {
+      this.state = State.IDLE;
+    }
+  }
+  afterBufferFlushed(media, bufferType, playlistType) {
+    if (!media) {
+      return;
+    }
+    // After successful buffer flushing, filter flushed fragments from bufferedFrags use mediaBuffered instead of media
+    // (so that we will check against video.buffered ranges in case of alt audio track)
+    const bufferedTimeRanges = BufferHelper.getBuffered(media);
+    this.fragmentTracker.detectEvictedFragments(bufferType, bufferedTimeRanges, playlistType);
+    if (this.state === State.ENDED) {
+      this.resetLoadingState();
+    }
+  }
+  resetLoadingState() {
+    this.log('Reset loading state');
+    this.fragCurrent = null;
+    this.fragPrevious = null;
+    if (this.state !== State.STOPPED) {
+      this.state = State.IDLE;
+    }
+  }
+  resetStartWhenNotLoaded() {
+    // if loadedmetadata is not set, it means that first frag request failed
+    // in that case, reset startFragRequested flag
+    if (!this.hls.hasEnoughToStart) {
+      this.startFragRequested = false;
+      const level = this.levelLastLoaded;
+      const details = level ? level.details : null;
+      if (details != null && details.live) {
+        // Update the start position and return to IDLE to recover live start
+        this.log(`resetting startPosition for live start`);
+        this.startPosition = -1;
+        this.setStartPosition(details, details.fragmentStart);
+        this.resetLoadingState();
+      } else {
+        this.nextLoadPosition = this.startPosition;
+      }
+    }
+  }
+  resetWhenMissingContext(chunkMeta) {
+    this.log(`Loading context changed while buffering sn ${chunkMeta.sn} of ${this.playlistLabel()} ${chunkMeta.level === -1 ? '<removed>' : chunkMeta.level}. This chunk will not be buffered.`);
+    this.removeUnbufferedFrags();
+    this.resetStartWhenNotLoaded();
+    this.resetLoadingState();
+  }
+  removeUnbufferedFrags(start = 0) {
+    this.fragmentTracker.removeFragmentsInRange(start, Infinity, this.playlistType, false, true);
+  }
+  updateLevelTiming(frag, part, level, partial) {
+    const details = level.details;
+    if (!details) {
+      this.warn('level.details undefined');
+      return;
+    }
+    const parsed = Object.keys(frag.elementaryStreams).reduce((result, type) => {
+      const info = frag.elementaryStreams[type];
+      if (info) {
+        const parsedDuration = info.endPTS - info.startPTS;
+        if (parsedDuration <= 0) {
+          // Destroy the transmuxer after it's next time offset failed to advance because duration was <= 0.
+          // The new transmuxer will be configured with a time offset matching the next fragment start,
+          // preventing the timeline from shifting.
+          this.warn(`Could not parse fragment ${frag.sn} ${type} duration reliably (${parsedDuration})`);
+          return result || false;
+        }
+        const drift = partial ? 0 : updateFragPTSDTS(details, frag, info.startPTS, info.endPTS, info.startDTS, info.endDTS, this);
+        this.hls.trigger(Events.LEVEL_PTS_UPDATED, {
+          details,
+          level,
+          drift,
+          type,
+          frag,
+          start: info.startPTS,
+          end: info.endPTS
+        });
+        return true;
+      }
+      return result;
+    }, false);
+    if (!parsed) {
+      var _this$transmuxer;
+      const mediaNotFound = ((_this$transmuxer = this.transmuxer) == null ? void 0 : _this$transmuxer.error) === null;
+      if (level.fragmentError === 0 || mediaNotFound && (level.fragmentError < 2 || frag.endList)) {
+        // Mark and track the odd (or last) empty segment as a gap to avoid reloading
+        this.treatAsGap(frag, level);
+      }
+      if (mediaNotFound) {
+        const error = new Error(`Found no media in fragment ${frag.sn} of ${this.playlistLabel()} ${frag.level} resetting transmuxer to fallback to playlist timing`);
+        this.warn(error.message);
+        this.hls.trigger(Events.ERROR, {
+          type: ErrorTypes.MEDIA_ERROR,
+          details: ErrorDetails.FRAG_PARSING_ERROR,
+          fatal: false,
+          error,
+          frag,
+          reason: `Found no media in msn ${frag.sn} of ${this.playlistLabel()} "${level.url}"`
+        });
+        if (!this.hls) {
+          return;
+        }
+        this.resetTransmuxer();
+      }
+      // For this error fallthrough. Marking parsed will allow advancing to next fragment.
+    }
+    this.state = State.PARSED;
+    this.log(`Parsed ${frag.type} sn: ${frag.sn}${part ? ' part: ' + part.index : ''} of ${this.fragInfo(frag, false, part)})`);
+    this.hls.trigger(Events.FRAG_PARSED, {
+      frag,
+      part
+    });
+  }
+  playlistLabel() {
+    return this.playlistType === PlaylistLevelType.MAIN ? 'level' : 'track';
+  }
+  fragInfo(frag, pts = true, part) {
+    var _ref, _ref2;
+    return `${this.playlistLabel()} ${frag.level} (${part ? 'part' : 'frag'}:[${((_ref = pts && !part ? frag.startPTS : (part || frag).start) != null ? _ref : NaN).toFixed(3)}-${((_ref2 = pts && !part ? frag.endPTS : (part || frag).end) != null ? _ref2 : NaN).toFixed(3)}]${part && frag.type === 'main' ? 'INDEPENDENT=' + (part.independent ? 'YES' : 'NO') : ''}`;
+  }
+  treatAsGap(frag, level) {
+    if (level) {
+      level.fragmentError++;
+    }
+    frag.gap = true;
+    this.fragmentTracker.removeFragment(frag);
+    this.fragmentTracker.fragBuffered(frag, true);
+  }
+  resetTransmuxer() {
+    var _this$transmuxer2;
+    (_this$transmuxer2 = this.transmuxer) == null || _this$transmuxer2.reset();
+  }
+  recoverWorkerError(data) {
+    if (data.event === 'demuxerWorker') {
+      this.fragmentTracker.removeAllFragments();
+      if (this.transmuxer) {
+        this.transmuxer.destroy();
+        this.transmuxer = null;
+      }
+      this.resetStartWhenNotLoaded();
+      this.resetLoadingState();
+    }
+  }
+  set state(nextState) {
+    const previousState = this._state;
+    if (previousState !== nextState) {
+      this._state = nextState;
+      this.log(`${previousState}->${nextState}`);
+    }
+  }
+  get state() {
+    return this._state;
+  }
+}
+function interstitialsEnabled(config) {
+  return !!config.interstitialsController && config.enableInterstitialPlayback !== false;
+}
+
+class ChunkCache {
+  constructor() {
+    this.chunks = [];
+    this.dataLength = 0;
+  }
+  push(chunk) {
+    this.chunks.push(chunk);
+    this.dataLength += chunk.length;
+  }
+  flush() {
+    const {
+      chunks,
+      dataLength
+    } = this;
+    let result;
+    if (!chunks.length) {
+      return new Uint8Array(0);
+    } else if (chunks.length === 1) {
+      result = chunks[0];
+    } else {
+      result = concatUint8Arrays(chunks, dataLength);
+    }
+    this.reset();
+    return result;
+  }
+  reset() {
+    this.chunks.length = 0;
+    this.dataLength = 0;
+  }
+}
+function concatUint8Arrays(chunks, dataLength) {
+  const result = new Uint8Array(dataLength);
+  let offset = 0;
+  for (let i = 0; i < chunks.length; i++) {
+    const chunk = chunks[i];
+    result.set(chunk, offset);
+    offset += chunk.length;
+  }
+  return result;
+}
+
+var eventemitter3 = {exports: {}};
+
+var hasRequiredEventemitter3;
+
+function requireEventemitter3 () {
+	if (hasRequiredEventemitter3) return eventemitter3.exports;
+	hasRequiredEventemitter3 = 1;
+	(function (module) {
+
+		var has = Object.prototype.hasOwnProperty
+		  , prefix = '~';
+
+		/**
+		 * Constructor to create a storage for our `EE` objects.
+		 * An `Events` instance is a plain object whose properties are event names.
+		 *
+		 * @constructor
+		 * @private
+		 */
+		function Events() {}
+
+		//
+		// We try to not inherit from `Object.prototype`. In some engines creating an
+		// instance in this way is faster than calling `Object.create(null)` directly.
+		// If `Object.create(null)` is not supported we prefix the event names with a
+		// character to make sure that the built-in object properties are not
+		// overridden or used as an attack vector.
+		//
+		if (Object.create) {
+		  Events.prototype = Object.create(null);
+
+		  //
+		  // This hack is needed because the `__proto__` property is still inherited in
+		  // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.
+		  //
+		  if (!new Events().__proto__) prefix = false;
+		}
+
+		/**
+		 * Representation of a single event listener.
+		 *
+		 * @param {Function} fn The listener function.
+		 * @param {*} context The context to invoke the listener with.
+		 * @param {Boolean} [once=false] Specify if the listener is a one-time listener.
+		 * @constructor
+		 * @private
+		 */
+		function EE(fn, context, once) {
+		  this.fn = fn;
+		  this.context = context;
+		  this.once = once || false;
+		}
+
+		/**
+		 * Add a listener for a given event.
+		 *
+		 * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+		 * @param {(String|Symbol)} event The event name.
+		 * @param {Function} fn The listener function.
+		 * @param {*} context The context to invoke the listener with.
+		 * @param {Boolean} once Specify if the listener is a one-time listener.
+		 * @returns {EventEmitter}
+		 * @private
+		 */
+		function addListener(emitter, event, fn, context, once) {
+		  if (typeof fn !== 'function') {
+		    throw new TypeError('The listener must be a function');
+		  }
+
+		  var listener = new EE(fn, context || emitter, once)
+		    , evt = prefix ? prefix + event : event;
+
+		  if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;
+		  else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);
+		  else emitter._events[evt] = [emitter._events[evt], listener];
+
+		  return emitter;
+		}
+
+		/**
+		 * Clear event by name.
+		 *
+		 * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
+		 * @param {(String|Symbol)} evt The Event name.
+		 * @private
+		 */
+		function clearEvent(emitter, evt) {
+		  if (--emitter._eventsCount === 0) emitter._events = new Events();
+		  else delete emitter._events[evt];
+		}
+
+		/**
+		 * Minimal `EventEmitter` interface that is molded against the Node.js
+		 * `EventEmitter` interface.
+		 *
+		 * @constructor
+		 * @public
+		 */
+		function EventEmitter() {
+		  this._events = new Events();
+		  this._eventsCount = 0;
+		}
+
+		/**
+		 * Return an array listing the events for which the emitter has registered
+		 * listeners.
+		 *
+		 * @returns {Array}
+		 * @public
+		 */
+		EventEmitter.prototype.eventNames = function eventNames() {
+		  var names = []
+		    , events
+		    , name;
+
+		  if (this._eventsCount === 0) return names;
+
+		  for (name in (events = this._events)) {
+		    if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
+		  }
+
+		  if (Object.getOwnPropertySymbols) {
+		    return names.concat(Object.getOwnPropertySymbols(events));
+		  }
+
+		  return names;
+		};
+
+		/**
+		 * Return the listeners registered for a given event.
+		 *
+		 * @param {(String|Symbol)} event The event name.
+		 * @returns {Array} The registered listeners.
+		 * @public
+		 */
+		EventEmitter.prototype.listeners = function listeners(event) {
+		  var evt = prefix ? prefix + event : event
+		    , handlers = this._events[evt];
+
+		  if (!handlers) return [];
+		  if (handlers.fn) return [handlers.fn];
+
+		  for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {
+		    ee[i] = handlers[i].fn;
+		  }
+
+		  return ee;
+		};
+
+		/**
+		 * Return the number of listeners listening to a given event.
+		 *
+		 * @param {(String|Symbol)} event The event name.
+		 * @returns {Number} The number of listeners.
+		 * @public
+		 */
+		EventEmitter.prototype.listenerCount = function listenerCount(event) {
+		  var evt = prefix ? prefix + event : event
+		    , listeners = this._events[evt];
+
+		  if (!listeners) return 0;
+		  if (listeners.fn) return 1;
+		  return listeners.length;
+		};
+
+		/**
+		 * Calls each of the listeners registered for a given event.
+		 *
+		 * @param {(String|Symbol)} event The event name.
+		 * @returns {Boolean} `true` if the event had listeners, else `false`.
+		 * @public
+		 */
+		EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
+		  var evt = prefix ? prefix + event : event;
+
+		  if (!this._events[evt]) return false;
+
+		  var listeners = this._events[evt]
+		    , len = arguments.length
+		    , args
+		    , i;
+
+		  if (listeners.fn) {
+		    if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);
+
+		    switch (len) {
+		      case 1: return listeners.fn.call(listeners.context), true;
+		      case 2: return listeners.fn.call(listeners.context, a1), true;
+		      case 3: return listeners.fn.call(listeners.context, a1, a2), true;
+		      case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
+		      case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
+		      case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
+		    }
+
+		    for (i = 1, args = new Array(len -1); i < len; i++) {
+		      args[i - 1] = arguments[i];
+		    }
+
+		    listeners.fn.apply(listeners.context, args);
+		  } else {
+		    var length = listeners.length
+		      , j;
+
+		    for (i = 0; i < length; i++) {
+		      if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);
+
+		      switch (len) {
+		        case 1: listeners[i].fn.call(listeners[i].context); break;
+		        case 2: listeners[i].fn.call(listeners[i].context, a1); break;
+		        case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
+		        case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;
+		        default:
+		          if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
+		            args[j - 1] = arguments[j];
+		          }
+
+		          listeners[i].fn.apply(listeners[i].context, args);
+		      }
+		    }
+		  }
+
+		  return true;
+		};
+
+		/**
+		 * Add a listener for a given event.
+		 *
+		 * @param {(String|Symbol)} event The event name.
+		 * @param {Function} fn The listener function.
+		 * @param {*} [context=this] The context to invoke the listener with.
+		 * @returns {EventEmitter} `this`.
+		 * @public
+		 */
+		EventEmitter.prototype.on = function on(event, fn, context) {
+		  return addListener(this, event, fn, context, false);
+		};
+
+		/**
+		 * Add a one-time listener for a given event.
+		 *
+		 * @param {(String|Symbol)} event The event name.
+		 * @param {Function} fn The listener function.
+		 * @param {*} [context=this] The context to invoke the listener with.
+		 * @returns {EventEmitter} `this`.
+		 * @public
+		 */
+		EventEmitter.prototype.once = function once(event, fn, context) {
+		  return addListener(this, event, fn, context, true);
+		};
+
+		/**
+		 * Remove the listeners of a given event.
+		 *
+		 * @param {(String|Symbol)} event The event name.
+		 * @param {Function} fn Only remove the listeners that match this function.
+		 * @param {*} context Only remove the listeners that have this context.
+		 * @param {Boolean} once Only remove one-time listeners.
+		 * @returns {EventEmitter} `this`.
+		 * @public
+		 */
+		EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
+		  var evt = prefix ? prefix + event : event;
+
+		  if (!this._events[evt]) return this;
+		  if (!fn) {
+		    clearEvent(this, evt);
+		    return this;
+		  }
+
+		  var listeners = this._events[evt];
+
+		  if (listeners.fn) {
+		    if (
+		      listeners.fn === fn &&
+		      (!once || listeners.once) &&
+		      (!context || listeners.context === context)
+		    ) {
+		      clearEvent(this, evt);
+		    }
+		  } else {
+		    for (var i = 0, events = [], length = listeners.length; i < length; i++) {
+		      if (
+		        listeners[i].fn !== fn ||
+		        (once && !listeners[i].once) ||
+		        (context && listeners[i].context !== context)
+		      ) {
+		        events.push(listeners[i]);
+		      }
+		    }
+
+		    //
+		    // Reset the array, or remove it completely if we have no more listeners.
+		    //
+		    if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;
+		    else clearEvent(this, evt);
+		  }
+
+		  return this;
+		};
+
+		/**
+		 * Remove all listeners, or those of the specified event.
+		 *
+		 * @param {(String|Symbol)} [event] The event name.
+		 * @returns {EventEmitter} `this`.
+		 * @public
+		 */
+		EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
+		  var evt;
+
+		  if (event) {
+		    evt = prefix ? prefix + event : event;
+		    if (this._events[evt]) clearEvent(this, evt);
+		  } else {
+		    this._events = new Events();
+		    this._eventsCount = 0;
+		  }
+
+		  return this;
+		};
+
+		//
+		// Alias methods names because people roll like that.
+		//
+		EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+		EventEmitter.prototype.addListener = EventEmitter.prototype.on;
+
+		//
+		// Expose the prefix.
+		//
+		EventEmitter.prefixed = prefix;
+
+		//
+		// Allow `EventEmitter` to be imported as module namespace.
+		//
+		EventEmitter.EventEmitter = EventEmitter;
+
+		//
+		// Expose the module.
+		//
+		{
+		  module.exports = EventEmitter;
+		} 
+	} (eventemitter3));
+	return eventemitter3.exports;
+}
+
+var eventemitter3Exports = requireEventemitter3();
+var EventEmitter = /*@__PURE__*/getDefaultExportFromCjs(eventemitter3Exports);
+
+const version = "1.6.16";
+
+// ensure the worker ends up in the bundle
+// If the worker should not be included this gets aliased to empty.js
+const workerStore = {};
+function hasUMDWorker() {
+  return typeof __HLS_WORKER_BUNDLE__ === 'function';
+}
+function injectWorker() {
+  const workerContext = workerStore[version];
+  if (workerContext) {
+    workerContext.clientCount++;
+    return workerContext;
+  }
+  const blob = new self.Blob([`var exports={};var module={exports:exports};function define(f){f()};define.amd=true;(${__HLS_WORKER_BUNDLE__.toString()})(true);`], {
+    type: 'text/javascript'
+  });
+  const objectURL = self.URL.createObjectURL(blob);
+  const worker = new self.Worker(objectURL);
+  const result = {
+    worker,
+    objectURL,
+    clientCount: 1
+  };
+  workerStore[version] = result;
+  return result;
+}
+function loadWorker(path) {
+  const workerContext = workerStore[path];
+  if (workerContext) {
+    workerContext.clientCount++;
+    return workerContext;
+  }
+  const scriptURL = new self.URL(path, self.location.href).href;
+  const worker = new self.Worker(scriptURL);
+  const result = {
+    worker,
+    scriptURL,
+    clientCount: 1
+  };
+  workerStore[path] = result;
+  return result;
+}
+function removeWorkerFromStore(path) {
+  const workerContext = workerStore[path || version];
+  if (workerContext) {
+    const clientCount = workerContext.clientCount--;
+    if (clientCount === 1) {
+      const {
+        worker,
+        objectURL
+      } = workerContext;
+      delete workerStore[path || version];
+      if (objectURL) {
+        // revoke the Object URL that was used to create transmuxer worker, so as not to leak it
+        self.URL.revokeObjectURL(objectURL);
+      }
+      worker.terminate();
+    }
+  }
+}
+
+/**
+ * Returns true if an ID3 footer can be found at offset in data
+ *
+ * @param data - The data to search in
+ * @param offset - The offset at which to start searching
+ *
+ * @returns `true` if an ID3 footer is found
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function isId3Footer(data, offset) {
+  /*
+   * The footer is a copy of the header, but with a different identifier
+   */
+  if (offset + 10 <= data.length) {
+    // look for '3DI' identifier
+    if (data[offset] === 0x33 && data[offset + 1] === 0x44 && data[offset + 2] === 0x49) {
+      // check version is within range
+      if (data[offset + 3] < 0xff && data[offset + 4] < 0xff) {
+        // check size is within range
+        if (data[offset + 6] < 0x80 && data[offset + 7] < 0x80 && data[offset + 8] < 0x80 && data[offset + 9] < 0x80) {
+          return true;
+        }
+      }
+    }
+  }
+  return false;
+}
+
+/**
+ * Returns true if an ID3 header can be found at offset in data
+ *
+ * @param data - The data to search in
+ * @param offset - The offset at which to start searching
+ *
+ * @returns `true` if an ID3 header is found
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function isId3Header(data, offset) {
+  /*
+   * http://id3.org/id3v2.3.0
+   * [0]     = 'I'
+   * [1]     = 'D'
+   * [2]     = '3'
+   * [3,4]   = {Version}
+   * [5]     = {Flags}
+   * [6-9]   = {ID3 Size}
+   *
+   * An ID3v2 tag can be detected with the following pattern:
+   *  $49 44 33 yy yy xx zz zz zz zz
+   * Where yy is less than $FF, xx is the 'flags' byte and zz is less than $80
+   */
+  if (offset + 10 <= data.length) {
+    // look for 'ID3' identifier
+    if (data[offset] === 0x49 && data[offset + 1] === 0x44 && data[offset + 2] === 0x33) {
+      // check version is within range
+      if (data[offset + 3] < 0xff && data[offset + 4] < 0xff) {
+        // check size is within range
+        if (data[offset + 6] < 0x80 && data[offset + 7] < 0x80 && data[offset + 8] < 0x80 && data[offset + 9] < 0x80) {
+          return true;
+        }
+      }
+    }
+  }
+  return false;
+}
+
+/**
+ * Read ID3 size
+ *
+ * @param data - The data to read from
+ * @param offset - The offset at which to start reading
+ *
+ * @returns The size
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function readId3Size(data, offset) {
+  let size = 0;
+  size = (data[offset] & 0x7f) << 21;
+  size |= (data[offset + 1] & 0x7f) << 14;
+  size |= (data[offset + 2] & 0x7f) << 7;
+  size |= data[offset + 3] & 0x7f;
+  return size;
+}
+
+/**
+ * Returns any adjacent ID3 tags found in data starting at offset, as one block of data
+ *
+ * @param data - The data to search in
+ * @param offset - The offset at which to start searching
+ *
+ * @returns The block of data containing any ID3 tags found
+ * or `undefined` if no header is found at the starting offset
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function getId3Data(data, offset) {
+  const front = offset;
+  let length = 0;
+  while (isId3Header(data, offset)) {
+    // ID3 header is 10 bytes
+    length += 10;
+    const size = readId3Size(data, offset + 6);
+    length += size;
+    if (isId3Footer(data, offset + 10)) {
+      // ID3 footer is 10 bytes
+      length += 10;
+    }
+    offset += length;
+  }
+  if (length > 0) {
+    return data.subarray(front, front + length);
+  }
+  return undefined;
+}
+
+function getAudioConfig(observer, data, offset, manifestCodec) {
+  const adtsSamplingRates = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];
+  const byte2 = data[offset + 2];
+  const adtsSamplingIndex = byte2 >> 2 & 0xf;
+  if (adtsSamplingIndex > 12) {
+    const error = new Error(`invalid ADTS sampling index:${adtsSamplingIndex}`);
+    observer.emit(Events.ERROR, Events.ERROR, {
+      type: ErrorTypes.MEDIA_ERROR,
+      details: ErrorDetails.FRAG_PARSING_ERROR,
+      fatal: true,
+      error,
+      reason: error.message
+    });
+    return;
+  }
+  // MPEG-4 Audio Object Type (profile_ObjectType+1)
+  const adtsObjectType = (byte2 >> 6 & 0x3) + 1;
+  const channelCount = data[offset + 3] >> 6 & 0x3 | (byte2 & 1) << 2;
+  const codec = 'mp4a.40.' + adtsObjectType;
+  /* refer to http://wiki.multimedia.cx/index.php?title=MPEG-4_Audio#Audio_Specific_Config
+      ISO/IEC 14496-3 - Table 1.13 — Syntax of AudioSpecificConfig()
+    Audio Profile / Audio Object Type
+    0: Null
+    1: AAC Main
+    2: AAC LC (Low Complexity)
+    3: AAC SSR (Scalable Sample Rate)
+    4: AAC LTP (Long Term Prediction)
+    5: SBR (Spectral Band Replication)
+    6: AAC Scalable
+   sampling freq
+    0: 96000 Hz
+    1: 88200 Hz
+    2: 64000 Hz
+    3: 48000 Hz
+    4: 44100 Hz
+    5: 32000 Hz
+    6: 24000 Hz
+    7: 22050 Hz
+    8: 16000 Hz
+    9: 12000 Hz
+    10: 11025 Hz
+    11: 8000 Hz
+    12: 7350 Hz
+    13: Reserved
+    14: Reserved
+    15: frequency is written explictly
+    Channel Configurations
+    These are the channel configurations:
+    0: Defined in AOT Specifc Config
+    1: 1 channel: front-center
+    2: 2 channels: front-left, front-right
+  */
+  // audioObjectType = profile => profile, the MPEG-4 Audio Object Type minus 1
+  const samplerate = adtsSamplingRates[adtsSamplingIndex];
+  let aacSampleIndex = adtsSamplingIndex;
+  if (adtsObjectType === 5 || adtsObjectType === 29) {
+    // HE-AAC uses SBR (Spectral Band Replication) , high frequencies are constructed from low frequencies
+    // there is a factor 2 between frame sample rate and output sample rate
+    // multiply frequency by 2 (see table above, equivalent to substract 3)
+    aacSampleIndex -= 3;
+  }
+  const config = [adtsObjectType << 3 | (aacSampleIndex & 0x0e) >> 1, (aacSampleIndex & 0x01) << 7 | channelCount << 3];
+  logger.log(`manifest codec:${manifestCodec}, parsed codec:${codec}, channels:${channelCount}, rate:${samplerate} (ADTS object type:${adtsObjectType} sampling index:${adtsSamplingIndex})`);
+  return {
+    config,
+    samplerate,
+    channelCount,
+    codec,
+    parsedCodec: codec,
+    manifestCodec
+  };
+}
+function isHeaderPattern$1(data, offset) {
+  return data[offset] === 0xff && (data[offset + 1] & 0xf6) === 0xf0;
+}
+function getHeaderLength(data, offset) {
+  return data[offset + 1] & 0x01 ? 7 : 9;
+}
+function getFullFrameLength(data, offset) {
+  return (data[offset + 3] & 0x03) << 11 | data[offset + 4] << 3 | (data[offset + 5] & 0xe0) >>> 5;
+}
+function canGetFrameLength(data, offset) {
+  return offset + 5 < data.length;
+}
+function isHeader$1(data, offset) {
+  // Look for ADTS header | 1111 1111 | 1111 X00X | where X can be either 0 or 1
+  // Layer bits (position 14 and 15) in header should be always 0 for ADTS
+  // More info https://wiki.multimedia.cx/index.php?title=ADTS
+  return offset + 1 < data.length && isHeaderPattern$1(data, offset);
+}
+function canParse$1(data, offset) {
+  return canGetFrameLength(data, offset) && isHeaderPattern$1(data, offset) && getFullFrameLength(data, offset) <= data.length - offset;
+}
+function probe$1(data, offset) {
+  // same as isHeader but we also check that ADTS frame follows last ADTS frame
+  // or end of data is reached
+  if (isHeader$1(data, offset)) {
+    // ADTS header Length
+    const headerLength = getHeaderLength(data, offset);
+    if (offset + headerLength >= data.length) {
+      return false;
+    }
+    // ADTS frame Length
+    const frameLength = getFullFrameLength(data, offset);
+    if (frameLength <= headerLength) {
+      return false;
+    }
+    const newOffset = offset + frameLength;
+    return newOffset === data.length || isHeader$1(data, newOffset);
+  }
+  return false;
+}
+function initTrackConfig(track, observer, data, offset, audioCodec) {
+  if (!track.samplerate) {
+    const config = getAudioConfig(observer, data, offset, audioCodec);
+    if (!config) {
+      return;
+    }
+    _extends(track, config);
+  }
+}
+function getFrameDuration(samplerate) {
+  return 1024 * 90000 / samplerate;
+}
+function parseFrameHeader(data, offset) {
+  // The protection skip bit tells us if we have 2 bytes of CRC data at the end of the ADTS header
+  const headerLength = getHeaderLength(data, offset);
+  if (offset + headerLength <= data.length) {
+    // retrieve frame size
+    const frameLength = getFullFrameLength(data, offset) - headerLength;
+    if (frameLength > 0) {
+      // logger.log(`AAC frame, offset/length/total/pts:${offset+headerLength}/${frameLength}/${data.byteLength}`);
+      return {
+        headerLength,
+        frameLength
+      };
+    }
+  }
+}
+function appendFrame$2(track, data, offset, pts, frameIndex) {
+  const frameDuration = getFrameDuration(track.samplerate);
+  const stamp = pts + frameIndex * frameDuration;
+  const header = parseFrameHeader(data, offset);
+  let unit;
+  if (header) {
+    const {
+      frameLength,
+      headerLength
+    } = header;
+    const _length = headerLength + frameLength;
+    const missing = Math.max(0, offset + _length - data.length);
+    // logger.log(`AAC frame ${frameIndex}, pts:${stamp} length@offset/total: ${frameLength}@${offset+headerLength}/${data.byteLength} missing: ${missing}`);
+    if (missing) {
+      unit = new Uint8Array(_length - headerLength);
+      unit.set(data.subarray(offset + headerLength, data.length), 0);
+    } else {
+      unit = data.subarray(offset + headerLength, offset + _length);
+    }
+    const _sample = {
+      unit,
+      pts: stamp
+    };
+    if (!missing) {
+      track.samples.push(_sample);
+    }
+    return {
+      sample: _sample,
+      length: _length,
+      missing
+    };
+  }
+  // overflow incomplete header
+  const length = data.length - offset;
+  unit = new Uint8Array(length);
+  unit.set(data.subarray(offset, data.length), 0);
+  const sample = {
+    unit,
+    pts: stamp
+  };
+  return {
+    sample,
+    length,
+    missing: -1
+  };
+}
+
+/**
+ * Checks if the given data contains an ID3 tag.
+ *
+ * @param data - The data to check
+ * @param offset - The offset at which to start checking
+ *
+ * @returns `true` if an ID3 tag is found
+ *
+ * @group ID3
+ *
+ * @beta
+ */
+function canParseId3(data, offset) {
+  return isId3Header(data, offset) && readId3Size(data, offset + 6) + 10 <= data.length - offset;
+}
+
+function toArrayBuffer(view) {
+  if (view instanceof ArrayBuffer) {
+    return view;
+  } else {
+    if (view.byteOffset == 0 && view.byteLength == view.buffer.byteLength) {
+      // This is a TypedArray over the whole buffer.
+      return view.buffer;
+    }
+    // This is a 'view' on the buffer.  Create a new buffer that only contains
+    // the data.  Note that since this isn't an ArrayBuffer, the 'new' call
+    // will allocate a new buffer to hold the copy.
+    return new Uint8Array(view).buffer;
+  }
+}
+
+function toUint8(data, offset = 0, length = Infinity) {
+  return view(data, offset, length, Uint8Array);
+}
+function view(data, offset, length, Type) {
+  const buffer = unsafeGetArrayBuffer(data);
+  let bytesPerElement = 1;
+  if ('BYTES_PER_ELEMENT' in Type) {
+    bytesPerElement = Type.BYTES_PER_ELEMENT;
+  }
+  // Absolute end of the |data| view within |buffer|.
+  const dataOffset = isArrayBufferView(data) ? data.byteOffset : 0;
+  const dataEnd = (dataOffset + data.byteLength) / bytesPerElement;
+  // Absolute start of the result within |buffer|.
+  const rawStart = (dataOffset + offset) / bytesPerElement;
+  const start = Math.floor(Math.max(0, Math.min(rawStart, dataEnd)));
+  // Absolute end of the result within |buffer|.
+  const end = Math.floor(Math.min(start + Math.max(length, 0), dataEnd));
+  return new Type(buffer, start, end - start);
+}
+function unsafeGetArrayBuffer(view) {
+  if (view instanceof ArrayBuffer) {
+    return view;
+  } else {
+    return view.buffer;
+  }
+}
+function isArrayBufferView(obj) {
+  return obj && obj.buffer instanceof ArrayBuffer && obj.byteLength !== undefined && obj.byteOffset !== undefined;
+}
+
+function decodeId3ImageFrame(frame) {
+  const metadataFrame = {
+    key: frame.type,
+    description: '',
+    data: '',
+    mimeType: null,
+    pictureType: null
+  };
+  const utf8Encoding = 0x03;
+  if (frame.size < 2) {
+    return undefined;
+  }
+  if (frame.data[0] !== utf8Encoding) {
+    console.log('Ignore frame with unrecognized character ' + 'encoding');
+    return undefined;
+  }
+  const mimeTypeEndIndex = frame.data.subarray(1).indexOf(0);
+  if (mimeTypeEndIndex === -1) {
+    return undefined;
+  }
+  const mimeType = utf8ArrayToStr(toUint8(frame.data, 1, mimeTypeEndIndex));
+  const pictureType = frame.data[2 + mimeTypeEndIndex];
+  const descriptionEndIndex = frame.data.subarray(3 + mimeTypeEndIndex).indexOf(0);
+  if (descriptionEndIndex === -1) {
+    return undefined;
+  }
+  const description = utf8ArrayToStr(toUint8(frame.data, 3 + mimeTypeEndIndex, descriptionEndIndex));
+  let data;
+  if (mimeType === '-->') {
+    data = utf8ArrayToStr(toUint8(frame.data, 4 + mimeTypeEndIndex + descriptionEndIndex));
+  } else {
+    data = toArrayBuffer(frame.data.subarray(4 + mimeTypeEndIndex + descriptionEndIndex));
+  }
+  metadataFrame.mimeType = mimeType;
+  metadataFrame.pictureType = pictureType;
+  metadataFrame.description = description;
+  metadataFrame.data = data;
+  return metadataFrame;
+}
+
+/**
+ * Decode an ID3 PRIV frame.
+ *
+ * @param frame - the ID3 PRIV frame
+ *
+ * @returns The decoded ID3 PRIV frame
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function decodeId3PrivFrame(frame) {
+  /*
+  Format: <text string>\0<binary data>
+  */
+  if (frame.size < 2) {
+    return undefined;
+  }
+  const owner = utf8ArrayToStr(frame.data, true);
+  const privateData = new Uint8Array(frame.data.subarray(owner.length + 1));
+  return {
+    key: frame.type,
+    info: owner,
+    data: privateData.buffer
+  };
+}
+
+/**
+ * Decodes an ID3 text frame
+ *
+ * @param frame - the ID3 text frame
+ *
+ * @returns The decoded ID3 text frame
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function decodeId3TextFrame(frame) {
+  if (frame.size < 2) {
+    return undefined;
+  }
+  if (frame.type === 'TXXX') {
+    /*
+    Format:
+    [0]   = {Text Encoding}
+    [1-?] = {Description}\0{Value}
+    */
+    let index = 1;
+    const description = utf8ArrayToStr(frame.data.subarray(index), true);
+    index += description.length + 1;
+    const value = utf8ArrayToStr(frame.data.subarray(index));
+    return {
+      key: frame.type,
+      info: description,
+      data: value
+    };
+  }
+  /*
+  Format:
+  [0]   = {Text Encoding}
+  [1-?] = {Value}
+  */
+  const text = utf8ArrayToStr(frame.data.subarray(1));
+  return {
+    key: frame.type,
+    info: '',
+    data: text
+  };
+}
+
+/**
+ * Decode a URL frame
+ *
+ * @param frame - the ID3 URL frame
+ *
+ * @returns The decoded ID3 URL frame
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function decodeId3UrlFrame(frame) {
+  if (frame.type === 'WXXX') {
+    /*
+    Format:
+    [0]   = {Text Encoding}
+    [1-?] = {Description}\0{URL}
+    */
+    if (frame.size < 2) {
+      return undefined;
+    }
+    let index = 1;
+    const description = utf8ArrayToStr(frame.data.subarray(index), true);
+    index += description.length + 1;
+    const value = utf8ArrayToStr(frame.data.subarray(index));
+    return {
+      key: frame.type,
+      info: description,
+      data: value
+    };
+  }
+  /*
+  Format:
+  [0-?] = {URL}
+  */
+  const url = utf8ArrayToStr(frame.data);
+  return {
+    key: frame.type,
+    info: '',
+    data: url
+  };
+}
+
+/**
+ * Decode an ID3 frame.
+ *
+ * @param frame - the ID3 frame
+ *
+ * @returns The decoded ID3 frame
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function decodeId3Frame(frame) {
+  if (frame.type === 'PRIV') {
+    return decodeId3PrivFrame(frame);
+  } else if (frame.type[0] === 'W') {
+    return decodeId3UrlFrame(frame);
+  } else if (frame.type === 'APIC') {
+    return decodeId3ImageFrame(frame);
+  }
+  return decodeId3TextFrame(frame);
+}
+
+/**
+ * Returns the data of an ID3 frame.
+ *
+ * @param data - The data to read from
+ *
+ * @returns The data of the ID3 frame
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function getId3FrameData(data) {
+  /*
+  Frame ID       $xx xx xx xx (four characters)
+  Size           $xx xx xx xx
+  Flags          $xx xx
+  */
+  const type = String.fromCharCode(data[0], data[1], data[2], data[3]);
+  const size = readId3Size(data, 4);
+  // skip frame id, size, and flags
+  const offset = 10;
+  return {
+    type,
+    size,
+    data: data.subarray(offset, offset + size)
+  };
+}
+
+const HEADER_FOOTER_SIZE = 10;
+const FRAME_SIZE = 10;
+/**
+ * Returns an array of ID3 frames found in all the ID3 tags in the id3Data
+ *
+ * @param id3Data - The ID3 data containing one or more ID3 tags
+ *
+ * @returns Array of ID3 frame objects
+ *
+ * @group ID3
+ *
+ * @beta
+ */
+function getId3Frames(id3Data) {
+  let offset = 0;
+  const frames = [];
+  while (isId3Header(id3Data, offset)) {
+    const size = readId3Size(id3Data, offset + 6);
+    if (id3Data[offset + 5] >> 6 & 1) {
+      // skip extended header
+      offset += HEADER_FOOTER_SIZE;
+    }
+    // skip past ID3 header
+    offset += HEADER_FOOTER_SIZE;
+    const end = offset + size;
+    // loop through frames in the ID3 tag
+    while (offset + FRAME_SIZE < end) {
+      const frameData = getId3FrameData(id3Data.subarray(offset));
+      const frame = decodeId3Frame(frameData);
+      if (frame) {
+        frames.push(frame);
+      }
+      // skip frame header and frame data
+      offset += frameData.size + HEADER_FOOTER_SIZE;
+    }
+    if (isId3Footer(id3Data, offset)) {
+      offset += HEADER_FOOTER_SIZE;
+    }
+  }
+  return frames;
+}
+
+/**
+ * Returns true if the ID3 frame is an Elementary Stream timestamp frame
+ *
+ * @param frame - the ID3 frame
+ *
+ * @returns `true` if the ID3 frame is an Elementary Stream timestamp frame
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function isId3TimestampFrame(frame) {
+  return frame && frame.key === 'PRIV' && frame.info === 'com.apple.streaming.transportStreamTimestamp';
+}
+
+/**
+ * Read a 33 bit timestamp from an ID3 frame.
+ *
+ * @param timeStampFrame - the ID3 frame
+ *
+ * @returns The timestamp
+ *
+ * @internal
+ *
+ * @group ID3
+ */
+function readId3Timestamp(timeStampFrame) {
+  if (timeStampFrame.data.byteLength === 8) {
+    const data = new Uint8Array(timeStampFrame.data);
+    // timestamp is 33 bit expressed as a big-endian eight-octet number,
+    // with the upper 31 bits set to zero.
+    const pts33Bit = data[3] & 0x1;
+    let timestamp = (data[4] << 23) + (data[5] << 15) + (data[6] << 7) + data[7];
+    timestamp /= 45;
+    if (pts33Bit) {
+      timestamp += 47721858.84;
+    } // 2^32 / 90
+    return Math.round(timestamp);
+  }
+  return undefined;
+}
+
+/**
+ * Searches for the Elementary Stream timestamp found in the ID3 data chunk
+ *
+ * @param data - Block of data containing one or more ID3 tags
+ *
+ * @returns The timestamp
+ *
+ * @group ID3
+ *
+ * @beta
+ */
+function getId3Timestamp(data) {
+  const frames = getId3Frames(data);
+  for (let i = 0; i < frames.length; i++) {
+    const frame = frames[i];
+    if (isId3TimestampFrame(frame)) {
+      return readId3Timestamp(frame);
+    }
+  }
+  return undefined;
+}
+
+let MetadataSchema = /*#__PURE__*/function (MetadataSchema) {
+  MetadataSchema["audioId3"] = "org.id3";
+  MetadataSchema["dateRange"] = "com.apple.quicktime.HLS";
+  MetadataSchema["emsg"] = "https://aomedia.org/emsg/ID3";
+  MetadataSchema["misbklv"] = "urn:misb:KLV:bin:1910.1";
+  return MetadataSchema;
+}({});
+
+function dummyTrack(type = '', inputTimeScale = 90000) {
+  return {
+    type,
+    id: -1,
+    pid: -1,
+    inputTimeScale,
+    sequenceNumber: -1,
+    samples: [],
+    dropped: 0
+  };
+}
+
+class BaseAudioDemuxer {
+  constructor() {
+    this._audioTrack = void 0;
+    this._id3Track = void 0;
+    this.frameIndex = 0;
+    this.cachedData = null;
+    this.basePTS = null;
+    this.initPTS = null;
+    this.lastPTS = null;
+  }
+  resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
+    this._id3Track = {
+      type: 'id3',
+      id: 3,
+      pid: -1,
+      inputTimeScale: 90000,
+      sequenceNumber: 0,
+      samples: [],
+      dropped: 0
+    };
+  }
+  resetTimeStamp(deaultTimestamp) {
+    this.initPTS = deaultTimestamp;
+    this.resetContiguity();
+  }
+  resetContiguity() {
+    this.basePTS = null;
+    this.lastPTS = null;
+    this.frameIndex = 0;
+  }
+  canParse(data, offset) {
+    return false;
+  }
+  appendFrame(track, data, offset) {}
+
+  // feed incoming data to the front of the parsing pipeline
+  demux(data, timeOffset) {
+    if (this.cachedData) {
+      data = appendUint8Array(this.cachedData, data);
+      this.cachedData = null;
+    }
+    let id3Data = getId3Data(data, 0);
+    let offset = id3Data ? id3Data.length : 0;
+    let lastDataIndex;
+    const track = this._audioTrack;
+    const id3Track = this._id3Track;
+    const timestamp = id3Data ? getId3Timestamp(id3Data) : undefined;
+    const length = data.length;
+    if (this.basePTS === null || this.frameIndex === 0 && isFiniteNumber(timestamp)) {
+      this.basePTS = initPTSFn(timestamp, timeOffset, this.initPTS);
+      this.lastPTS = this.basePTS;
+    }
+    if (this.lastPTS === null) {
+      this.lastPTS = this.basePTS;
+    }
+
+    // more expressive than alternative: id3Data?.length
+    if (id3Data && id3Data.length > 0) {
+      id3Track.samples.push({
+        pts: this.lastPTS,
+        dts: this.lastPTS,
+        data: id3Data,
+        type: MetadataSchema.audioId3,
+        duration: Number.POSITIVE_INFINITY
+      });
+    }
+    while (offset < length) {
+      if (this.canParse(data, offset)) {
+        const frame = this.appendFrame(track, data, offset);
+        if (frame) {
+          this.frameIndex++;
+          this.lastPTS = frame.sample.pts;
+          offset += frame.length;
+          lastDataIndex = offset;
+        } else {
+          offset = length;
+        }
+      } else if (canParseId3(data, offset)) {
+        // after a canParse, a call to getId3Data *should* always returns some data
+        id3Data = getId3Data(data, offset);
+        id3Track.samples.push({
+          pts: this.lastPTS,
+          dts: this.lastPTS,
+          data: id3Data,
+          type: MetadataSchema.audioId3,
+          duration: Number.POSITIVE_INFINITY
+        });
+        offset += id3Data.length;
+        lastDataIndex = offset;
+      } else {
+        offset++;
+      }
+      if (offset === length && lastDataIndex !== length) {
+        const partialData = data.slice(lastDataIndex);
+        if (this.cachedData) {
+          this.cachedData = appendUint8Array(this.cachedData, partialData);
+        } else {
+          this.cachedData = partialData;
+        }
+      }
+    }
+    return {
+      audioTrack: track,
+      videoTrack: dummyTrack(),
+      id3Track,
+      textTrack: dummyTrack()
+    };
+  }
+  demuxSampleAes(data, keyData, timeOffset) {
+    return Promise.reject(new Error(`[${this}] This demuxer does not support Sample-AES decryption`));
+  }
+  flush(timeOffset) {
+    // Parse cache in case of remaining frames.
+    const cachedData = this.cachedData;
+    if (cachedData) {
+      this.cachedData = null;
+      this.demux(cachedData, 0);
+    }
+    return {
+      audioTrack: this._audioTrack,
+      videoTrack: dummyTrack(),
+      id3Track: this._id3Track,
+      textTrack: dummyTrack()
+    };
+  }
+  destroy() {
+    this.cachedData = null;
+    // @ts-ignore
+    this._audioTrack = this._id3Track = undefined;
+  }
+}
+
+/**
+ * Initialize PTS
+ * <p>
+ *    use timestamp unless it is undefined, NaN or Infinity
+ * </p>
+ */
+const initPTSFn = (timestamp, timeOffset, initPTS) => {
+  if (isFiniteNumber(timestamp)) {
+    return timestamp * 90;
+  }
+  const init90kHz = initPTS ? initPTS.baseTime * 90000 / initPTS.timescale : 0;
+  return timeOffset * 90000 + init90kHz;
+};
+
+/**
+ *  MPEG parser helper
+ */
+
+let chromeVersion$1 = null;
+const BitratesMap = [32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160];
+const SamplingRateMap = [44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000];
+const SamplesCoefficients = [
+// MPEG 2.5
+[0,
+// Reserved
+72,
+// Layer3
+144,
+// Layer2
+12 // Layer1
+],
+// Reserved
+[0,
+// Reserved
+0,
+// Layer3
+0,
+// Layer2
+0 // Layer1
+],
+// MPEG 2
+[0,
+// Reserved
+72,
+// Layer3
+144,
+// Layer2
+12 // Layer1
+],
+// MPEG 1
+[0,
+// Reserved
+144,
+// Layer3
+144,
+// Layer2
+12 // Layer1
+]];
+const BytesInSlot = [0,
+// Reserved
+1,
+// Layer3
+1,
+// Layer2
+4 // Layer1
+];
+function appendFrame$1(track, data, offset, pts, frameIndex) {
+  // Using http://www.datavoyage.com/mpgscript/mpeghdr.htm as a reference
+  if (offset + 24 > data.length) {
+    return;
+  }
+  const header = parseHeader(data, offset);
+  if (header && offset + header.frameLength <= data.length) {
+    const frameDuration = header.samplesPerFrame * 90000 / header.sampleRate;
+    const stamp = pts + frameIndex * frameDuration;
+    const sample = {
+      unit: data.subarray(offset, offset + header.frameLength),
+      pts: stamp,
+      dts: stamp
+    };
+    track.config = [];
+    track.channelCount = header.channelCount;
+    track.samplerate = header.sampleRate;
+    track.samples.push(sample);
+    return {
+      sample,
+      length: header.frameLength,
+      missing: 0
+    };
+  }
+}
+function parseHeader(data, offset) {
+  const mpegVersion = data[offset + 1] >> 3 & 3;
+  const mpegLayer = data[offset + 1] >> 1 & 3;
+  const bitRateIndex = data[offset + 2] >> 4 & 15;
+  const sampleRateIndex = data[offset + 2] >> 2 & 3;
+  if (mpegVersion !== 1 && bitRateIndex !== 0 && bitRateIndex !== 15 && sampleRateIndex !== 3) {
+    const paddingBit = data[offset + 2] >> 1 & 1;
+    const channelMode = data[offset + 3] >> 6;
+    const columnInBitrates = mpegVersion === 3 ? 3 - mpegLayer : mpegLayer === 3 ? 3 : 4;
+    const bitRate = BitratesMap[columnInBitrates * 14 + bitRateIndex - 1] * 1000;
+    const columnInSampleRates = mpegVersion === 3 ? 0 : mpegVersion === 2 ? 1 : 2;
+    const sampleRate = SamplingRateMap[columnInSampleRates * 3 + sampleRateIndex];
+    const channelCount = channelMode === 3 ? 1 : 2; // If bits of channel mode are `11` then it is a single channel (Mono)
+    const sampleCoefficient = SamplesCoefficients[mpegVersion][mpegLayer];
+    const bytesInSlot = BytesInSlot[mpegLayer];
+    const samplesPerFrame = sampleCoefficient * 8 * bytesInSlot;
+    const frameLength = Math.floor(sampleCoefficient * bitRate / sampleRate + paddingBit) * bytesInSlot;
+    if (chromeVersion$1 === null) {
+      const userAgent = navigator.userAgent || '';
+      const result = userAgent.match(/Chrome\/(\d+)/i);
+      chromeVersion$1 = result ? parseInt(result[1]) : 0;
+    }
+    const needChromeFix = !!chromeVersion$1 && chromeVersion$1 <= 87;
+    if (needChromeFix && mpegLayer === 2 && bitRate >= 224000 && channelMode === 0) {
+      // Work around bug in Chromium by setting channelMode to dual-channel (01) instead of stereo (00)
+      data[offset + 3] = data[offset + 3] | 0x80;
+    }
+    return {
+      sampleRate,
+      channelCount,
+      frameLength,
+      samplesPerFrame
+    };
+  }
+}
+function isHeaderPattern(data, offset) {
+  return data[offset] === 0xff && (data[offset + 1] & 0xe0) === 0xe0 && (data[offset + 1] & 0x06) !== 0x00;
+}
+function isHeader(data, offset) {
+  // Look for MPEG header | 1111 1111 | 111X XYZX | where X can be either 0 or 1 and Y or Z should be 1
+  // Layer bits (position 14 and 15) in header should be always different from 0 (Layer I or Layer II or Layer III)
+  // More info http://www.mp3-tech.org/programmer/frame_header.html
+  return offset + 1 < data.length && isHeaderPattern(data, offset);
+}
+function canParse(data, offset) {
+  const headerSize = 4;
+  return isHeaderPattern(data, offset) && headerSize <= data.length - offset;
+}
+function probe(data, offset) {
+  // same as isHeader but we also check that MPEG frame follows last MPEG frame
+  // or end of data is reached
+  if (offset + 1 < data.length && isHeaderPattern(data, offset)) {
+    // MPEG header Length
+    const headerLength = 4;
+    // MPEG frame Length
+    const header = parseHeader(data, offset);
+    let frameLength = headerLength;
+    if (header != null && header.frameLength) {
+      frameLength = header.frameLength;
+    }
+    const newOffset = offset + frameLength;
+    return newOffset === data.length || isHeader(data, newOffset);
+  }
+  return false;
+}
+
+/**
+ * AAC demuxer
+ */
+class AACDemuxer extends BaseAudioDemuxer {
+  constructor(observer, config) {
+    super();
+    this.observer = void 0;
+    this.config = void 0;
+    this.observer = observer;
+    this.config = config;
+  }
+  resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
+    super.resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration);
+    this._audioTrack = {
+      container: 'audio/adts',
+      type: 'audio',
+      id: 2,
+      pid: -1,
+      sequenceNumber: 0,
+      segmentCodec: 'aac',
+      samples: [],
+      manifestCodec: audioCodec,
+      duration: trackDuration,
+      inputTimeScale: 90000,
+      dropped: 0
+    };
+  }
+
+  // Source for probe info - https://wiki.multimedia.cx/index.php?title=ADTS
+  static probe(data, logger) {
+    if (!data) {
+      return false;
+    }
+
+    // Check for the ADTS sync word
+    // Look for ADTS header | 1111 1111 | 1111 X00X | where X can be either 0 or 1
+    // Layer bits (position 14 and 15) in header should be always 0 for ADTS
+    // More info https://wiki.multimedia.cx/index.php?title=ADTS
+    const id3Data = getId3Data(data, 0);
+    let offset = (id3Data == null ? void 0 : id3Data.length) || 0;
+    if (probe(data, offset)) {
+      return false;
+    }
+    for (let length = data.length; offset < length; offset++) {
+      if (probe$1(data, offset)) {
+        logger.log('ADTS sync word found !');
+        return true;
+      }
+    }
+    return false;
+  }
+  canParse(data, offset) {
+    return canParse$1(data, offset);
+  }
+  appendFrame(track, data, offset) {
+    initTrackConfig(track, this.observer, data, offset, track.manifestCodec);
+    const frame = appendFrame$2(track, data, offset, this.basePTS, this.frameIndex);
+    if (frame && frame.missing === 0) {
+      return frame;
+    }
+  }
+}
+
+const getAudioBSID = (data, offset) => {
+  // check the bsid to confirm ac-3 | ec-3
+  let bsid = 0;
+  let numBits = 5;
+  offset += numBits;
+  const temp = new Uint32Array(1); // unsigned 32 bit for temporary storage
+  const mask = new Uint32Array(1); // unsigned 32 bit mask value
+  const byte = new Uint8Array(1); // unsigned 8 bit for temporary storage
+  while (numBits > 0) {
+    byte[0] = data[offset];
+    // read remaining bits, upto 8 bits at a time
+    const bits = Math.min(numBits, 8);
+    const shift = 8 - bits;
+    mask[0] = 0xff000000 >>> 24 + shift << shift;
+    temp[0] = (byte[0] & mask[0]) >> shift;
+    bsid = !bsid ? temp[0] : bsid << bits | temp[0];
+    offset += 1;
+    numBits -= bits;
+  }
+  return bsid;
+};
+
+class AC3Demuxer extends BaseAudioDemuxer {
+  constructor(observer) {
+    super();
+    this.observer = void 0;
+    this.observer = observer;
+  }
+  resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
+    super.resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration);
+    this._audioTrack = {
+      container: 'audio/ac-3',
+      type: 'audio',
+      id: 2,
+      pid: -1,
+      sequenceNumber: 0,
+      segmentCodec: 'ac3',
+      samples: [],
+      manifestCodec: audioCodec,
+      duration: trackDuration,
+      inputTimeScale: 90000,
+      dropped: 0
+    };
+  }
+  canParse(data, offset) {
+    return offset + 64 < data.length;
+  }
+  appendFrame(track, data, offset) {
+    const frameLength = appendFrame(track, data, offset, this.basePTS, this.frameIndex);
+    if (frameLength !== -1) {
+      const sample = track.samples[track.samples.length - 1];
+      return {
+        sample,
+        length: frameLength,
+        missing: 0
+      };
+    }
+  }
+  static probe(data) {
+    if (!data) {
+      return false;
+    }
+    const id3Data = getId3Data(data, 0);
+    if (!id3Data) {
+      return false;
+    }
+
+    // look for the ac-3 sync bytes
+    const offset = id3Data.length;
+    if (data[offset] === 0x0b && data[offset + 1] === 0x77 && getId3Timestamp(id3Data) !== undefined &&
+    // check the bsid to confirm ac-3
+    getAudioBSID(data, offset) < 16) {
+      return true;
+    }
+    return false;
+  }
+}
+function appendFrame(track, data, start, pts, frameIndex) {
+  if (start + 8 > data.length) {
+    return -1; // not enough bytes left
+  }
+  if (data[start] !== 0x0b || data[start + 1] !== 0x77) {
+    return -1; // invalid magic
+  }
+
+  // get sample rate
+  const samplingRateCode = data[start + 4] >> 6;
+  if (samplingRateCode >= 3) {
+    return -1; // invalid sampling rate
+  }
+  const samplingRateMap = [48000, 44100, 32000];
+  const sampleRate = samplingRateMap[samplingRateCode];
+
+  // get frame size
+  const frameSizeCode = data[start + 4] & 0x3f;
+  const frameSizeMap = [64, 69, 96, 64, 70, 96, 80, 87, 120, 80, 88, 120, 96, 104, 144, 96, 105, 144, 112, 121, 168, 112, 122, 168, 128, 139, 192, 128, 140, 192, 160, 174, 240, 160, 175, 240, 192, 208, 288, 192, 209, 288, 224, 243, 336, 224, 244, 336, 256, 278, 384, 256, 279, 384, 320, 348, 480, 320, 349, 480, 384, 417, 576, 384, 418, 576, 448, 487, 672, 448, 488, 672, 512, 557, 768, 512, 558, 768, 640, 696, 960, 640, 697, 960, 768, 835, 1152, 768, 836, 1152, 896, 975, 1344, 896, 976, 1344, 1024, 1114, 1536, 1024, 1115, 1536, 1152, 1253, 1728, 1152, 1254, 1728, 1280, 1393, 1920, 1280, 1394, 1920];
+  const frameLength = frameSizeMap[frameSizeCode * 3 + samplingRateCode] * 2;
+  if (start + frameLength > data.length) {
+    return -1;
+  }
+
+  // get channel count
+  const channelMode = data[start + 6] >> 5;
+  let skipCount = 0;
+  if (channelMode === 2) {
+    skipCount += 2;
+  } else {
+    if (channelMode & 1 && channelMode !== 1) {
+      skipCount += 2;
+    }
+    if (channelMode & 4) {
+      skipCount += 2;
+    }
+  }
+  const lfeon = (data[start + 6] << 8 | data[start + 7]) >> 12 - skipCount & 1;
+  const channelsMap = [2, 1, 2, 3, 3, 4, 4, 5];
+  const channelCount = channelsMap[channelMode] + lfeon;
+
+  // build dac3 box
+  const bsid = data[start + 5] >> 3;
+  const bsmod = data[start + 5] & 7;
+  const config = new Uint8Array([samplingRateCode << 6 | bsid << 1 | bsmod >> 2, (bsmod & 3) << 6 | channelMode << 3 | lfeon << 2 | frameSizeCode >> 4, frameSizeCode << 4 & 0xe0]);
+  const frameDuration = 1536 / sampleRate * 90000;
+  const stamp = pts + frameIndex * frameDuration;
+  const unit = data.subarray(start, start + frameLength);
+  track.config = config;
+  track.channelCount = channelCount;
+  track.samplerate = sampleRate;
+  track.samples.push({
+    unit,
+    pts: stamp
+  });
+  return frameLength;
+}
+
+/**
+ * MP3 demuxer
+ */
+class MP3Demuxer extends BaseAudioDemuxer {
+  resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
+    super.resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration);
+    this._audioTrack = {
+      container: 'audio/mpeg',
+      type: 'audio',
+      id: 2,
+      pid: -1,
+      sequenceNumber: 0,
+      segmentCodec: 'mp3',
+      samples: [],
+      manifestCodec: audioCodec,
+      duration: trackDuration,
+      inputTimeScale: 90000,
+      dropped: 0
+    };
+  }
+  static probe(data) {
+    if (!data) {
+      return false;
+    }
+
+    // check if data contains ID3 timestamp and MPEG sync word
+    // Look for MPEG header | 1111 1111 | 111X XYZX | where X can be either 0 or 1 and Y or Z should be 1
+    // Layer bits (position 14 and 15) in header should be always different from 0 (Layer I or Layer II or Layer III)
+    // More info http://www.mp3-tech.org/programmer/frame_header.html
+    const id3Data = getId3Data(data, 0);
+    let offset = (id3Data == null ? void 0 : id3Data.length) || 0;
+
+    // Check for ac-3|ec-3 sync bytes and return false if present
+    if (id3Data && data[offset] === 0x0b && data[offset + 1] === 0x77 && getId3Timestamp(id3Data) !== undefined &&
+    // check the bsid to confirm ac-3 or ec-3 (not mp3)
+    getAudioBSID(data, offset) <= 16) {
+      return false;
+    }
+    for (let length = data.length; offset < length; offset++) {
+      if (probe(data, offset)) {
+        logger.log('MPEG Audio sync word found !');
+        return true;
+      }
+    }
+    return false;
+  }
+  canParse(data, offset) {
+    return canParse(data, offset);
+  }
+  appendFrame(track, data, offset) {
+    if (this.basePTS === null) {
+      return;
+    }
+    return appendFrame$1(track, data, offset, this.basePTS, this.frameIndex);
+  }
+}
+
+const emsgSchemePattern = /\/emsg[-/]ID3/i;
+class MP4Demuxer {
+  constructor(observer, config) {
+    this.remainderData = null;
+    this.timeOffset = 0;
+    this.config = void 0;
+    this.videoTrack = void 0;
+    this.audioTrack = void 0;
+    this.id3Track = void 0;
+    this.txtTrack = void 0;
+    this.config = config;
+  }
+  resetTimeStamp() {}
+  resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
+    const videoTrack = this.videoTrack = dummyTrack('video', 1);
+    const audioTrack = this.audioTrack = dummyTrack('audio', 1);
+    const captionTrack = this.txtTrack = dummyTrack('text', 1);
+    this.id3Track = dummyTrack('id3', 1);
+    this.timeOffset = 0;
+    if (!(initSegment != null && initSegment.byteLength)) {
+      return;
+    }
+    const initData = parseInitSegment(initSegment);
+    if (initData.video) {
+      const {
+        id,
+        timescale,
+        codec,
+        supplemental
+      } = initData.video;
+      videoTrack.id = id;
+      videoTrack.timescale = captionTrack.timescale = timescale;
+      videoTrack.codec = codec;
+      videoTrack.supplemental = supplemental;
+    }
+    if (initData.audio) {
+      const {
+        id,
+        timescale,
+        codec
+      } = initData.audio;
+      audioTrack.id = id;
+      audioTrack.timescale = timescale;
+      audioTrack.codec = codec;
+    }
+    captionTrack.id = RemuxerTrackIdConfig.text;
+    videoTrack.sampleDuration = 0;
+    videoTrack.duration = audioTrack.duration = trackDuration;
+  }
+  resetContiguity() {
+    this.remainderData = null;
+  }
+  static probe(data) {
+    return hasMoofData(data);
+  }
+  demux(data, timeOffset) {
+    this.timeOffset = timeOffset;
+    // Load all data into the avc track. The CMAF remuxer will look for the data in the samples object; the rest of the fields do not matter
+    let videoSamples = data;
+    const videoTrack = this.videoTrack;
+    const textTrack = this.txtTrack;
+    if (this.config.progressive) {
+      // Split the bytestream into two ranges: one encompassing all data up until the start of the last moof, and everything else.
+      // This is done to guarantee that we're sending valid data to MSE - when demuxing progressively, we have no guarantee
+      // that the fetch loader gives us flush moof+mdat pairs. If we push jagged data to MSE, it will throw an exception.
+      if (this.remainderData) {
+        videoSamples = appendUint8Array(this.remainderData, data);
+      }
+      const segmentedData = segmentValidRange(videoSamples);
+      this.remainderData = segmentedData.remainder;
+      videoTrack.samples = segmentedData.valid || new Uint8Array();
+    } else {
+      videoTrack.samples = videoSamples;
+    }
+    const id3Track = this.extractID3Track(videoTrack, timeOffset);
+    textTrack.samples = parseSamples(timeOffset, videoTrack);
+    return {
+      videoTrack,
+      audioTrack: this.audioTrack,
+      id3Track,
+      textTrack: this.txtTrack
+    };
+  }
+  flush() {
+    const timeOffset = this.timeOffset;
+    const videoTrack = this.videoTrack;
+    const textTrack = this.txtTrack;
+    videoTrack.samples = this.remainderData || new Uint8Array();
+    this.remainderData = null;
+    const id3Track = this.extractID3Track(videoTrack, this.timeOffset);
+    textTrack.samples = parseSamples(timeOffset, videoTrack);
+    return {
+      videoTrack,
+      audioTrack: dummyTrack(),
+      id3Track,
+      textTrack: dummyTrack()
+    };
+  }
+  extractID3Track(videoTrack, timeOffset) {
+    const id3Track = this.id3Track;
+    if (videoTrack.samples.length) {
+      const emsgs = findBox(videoTrack.samples, ['emsg']);
+      if (emsgs) {
+        emsgs.forEach(data => {
+          const emsgInfo = parseEmsg(data);
+          if (emsgSchemePattern.test(emsgInfo.schemeIdUri)) {
+            const pts = getEmsgStartTime(emsgInfo, timeOffset);
+            let duration = emsgInfo.eventDuration === 0xffffffff ? Number.POSITIVE_INFINITY : emsgInfo.eventDuration / emsgInfo.timeScale;
+            // Safari takes anything <= 0.001 seconds and maps it to Infinity
+            if (duration <= 0.001) {
+              duration = Number.POSITIVE_INFINITY;
+            }
+            const payload = emsgInfo.payload;
+            id3Track.samples.push({
+              data: payload,
+              len: payload.byteLength,
+              dts: pts,
+              pts: pts,
+              type: MetadataSchema.emsg,
+              duration: duration
+            });
+          } else if (this.config.enableEmsgKLVMetadata && emsgInfo.schemeIdUri.startsWith('urn:misb:KLV:bin:1910.1')) {
+            const pts = getEmsgStartTime(emsgInfo, timeOffset);
+            id3Track.samples.push({
+              data: emsgInfo.payload,
+              len: emsgInfo.payload.byteLength,
+              dts: pts,
+              pts: pts,
+              type: MetadataSchema.misbklv,
+              duration: Number.POSITIVE_INFINITY
+            });
+          }
+        });
+      }
+    }
+    return id3Track;
+  }
+  demuxSampleAes(data, keyData, timeOffset) {
+    return Promise.reject(new Error('The MP4 demuxer does not support SAMPLE-AES decryption'));
+  }
+  destroy() {
+    // @ts-ignore
+    this.config = null;
+    this.remainderData = null;
+    this.videoTrack = this.audioTrack = this.id3Track = this.txtTrack = undefined;
+  }
+}
+function getEmsgStartTime(emsgInfo, timeOffset) {
+  return isFiniteNumber(emsgInfo.presentationTime) ? emsgInfo.presentationTime / emsgInfo.timeScale : timeOffset + emsgInfo.presentationTimeDelta / emsgInfo.timeScale;
+}
+
+/**
+ * SAMPLE-AES decrypter
+ */
+
+class SampleAesDecrypter {
+  constructor(observer, config, keyData) {
+    this.keyData = void 0;
+    this.decrypter = void 0;
+    this.keyData = keyData;
+    this.decrypter = new Decrypter(config, {
+      removePKCS7Padding: false
+    });
+  }
+  decryptBuffer(encryptedData) {
+    return this.decrypter.decrypt(encryptedData, this.keyData.key.buffer, this.keyData.iv.buffer, DecrypterAesMode.cbc);
+  }
+
+  // AAC - encrypt all full 16 bytes blocks starting from offset 16
+  decryptAacSample(samples, sampleIndex, callback) {
+    const curUnit = samples[sampleIndex].unit;
+    if (curUnit.length <= 16) {
+      // No encrypted portion in this sample (first 16 bytes is not
+      // encrypted, see https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption/Encryption/Encryption.html),
+      return;
+    }
+    const encryptedData = curUnit.subarray(16, curUnit.length - curUnit.length % 16);
+    const encryptedBuffer = encryptedData.buffer.slice(encryptedData.byteOffset, encryptedData.byteOffset + encryptedData.length);
+    this.decryptBuffer(encryptedBuffer).then(decryptedBuffer => {
+      const decryptedData = new Uint8Array(decryptedBuffer);
+      curUnit.set(decryptedData, 16);
+      if (!this.decrypter.isSync()) {
+        this.decryptAacSamples(samples, sampleIndex + 1, callback);
+      }
+    }).catch(callback);
+  }
+  decryptAacSamples(samples, sampleIndex, callback) {
+    for (;; sampleIndex++) {
+      if (sampleIndex >= samples.length) {
+        callback();
+        return;
+      }
+      if (samples[sampleIndex].unit.length < 32) {
+        continue;
+      }
+      this.decryptAacSample(samples, sampleIndex, callback);
+      if (!this.decrypter.isSync()) {
+        return;
+      }
+    }
+  }
+
+  // AVC - encrypt one 16 bytes block out of ten, starting from offset 32
+  getAvcEncryptedData(decodedData) {
+    const encryptedDataLen = Math.floor((decodedData.length - 48) / 160) * 16 + 16;
+    const encryptedData = new Int8Array(encryptedDataLen);
+    let outputPos = 0;
+    for (let inputPos = 32; inputPos < decodedData.length - 16; inputPos += 160, outputPos += 16) {
+      encryptedData.set(decodedData.subarray(inputPos, inputPos + 16), outputPos);
+    }
+    return encryptedData;
+  }
+  getAvcDecryptedUnit(decodedData, decryptedData) {
+    const uint8DecryptedData = new Uint8Array(decryptedData);
+    let inputPos = 0;
+    for (let outputPos = 32; outputPos < decodedData.length - 16; outputPos += 160, inputPos += 16) {
+      decodedData.set(uint8DecryptedData.subarray(inputPos, inputPos + 16), outputPos);
+    }
+    return decodedData;
+  }
+  decryptAvcSample(samples, sampleIndex, unitIndex, callback, curUnit) {
+    const decodedData = discardEPB(curUnit.data);
+    const encryptedData = this.getAvcEncryptedData(decodedData);
+    this.decryptBuffer(encryptedData.buffer).then(decryptedBuffer => {
+      curUnit.data = this.getAvcDecryptedUnit(decodedData, decryptedBuffer);
+      if (!this.decrypter.isSync()) {
+        this.decryptAvcSamples(samples, sampleIndex, unitIndex + 1, callback);
+      }
+    }).catch(callback);
+  }
+  decryptAvcSamples(samples, sampleIndex, unitIndex, callback) {
+    if (samples instanceof Uint8Array) {
+      throw new Error('Cannot decrypt samples of type Uint8Array');
+    }
+    for (;; sampleIndex++, unitIndex = 0) {
+      if (sampleIndex >= samples.length) {
+        callback();
+        return;
+      }
+      const curUnits = samples[sampleIndex].units;
+      for (;; unitIndex++) {
+        if (unitIndex >= curUnits.length) {
+          break;
+        }
+        const curUnit = curUnits[unitIndex];
+        if (curUnit.data.length <= 48 || curUnit.type !== 1 && curUnit.type !== 5) {
+          continue;
+        }
+        this.decryptAvcSample(samples, sampleIndex, unitIndex, callback, curUnit);
+        if (!this.decrypter.isSync()) {
+          return;
+        }
+      }
+    }
+  }
+}
+
+class BaseVideoParser {
+  constructor() {
+    this.VideoSample = null;
+  }
+  createVideoSample(key, pts, dts) {
+    return {
+      key,
+      frame: false,
+      pts,
+      dts,
+      units: [],
+      length: 0
+    };
+  }
+  getLastNalUnit(samples) {
+    var _VideoSample;
+    let VideoSample = this.VideoSample;
+    let lastUnit;
+    // try to fallback to previous sample if current one is empty
+    if (!VideoSample || VideoSample.units.length === 0) {
+      VideoSample = samples[samples.length - 1];
+    }
+    if ((_VideoSample = VideoSample) != null && _VideoSample.units) {
+      const units = VideoSample.units;
+      lastUnit = units[units.length - 1];
+    }
+    return lastUnit;
+  }
+  pushAccessUnit(VideoSample, videoTrack) {
+    if (VideoSample.units.length && VideoSample.frame) {
+      // if sample does not have PTS/DTS, patch with last sample PTS/DTS
+      if (VideoSample.pts === undefined) {
+        const samples = videoTrack.samples;
+        const nbSamples = samples.length;
+        if (nbSamples) {
+          const lastSample = samples[nbSamples - 1];
+          VideoSample.pts = lastSample.pts;
+          VideoSample.dts = lastSample.dts;
+        } else {
+          // dropping samples, no timestamp found
+          videoTrack.dropped++;
+          return;
+        }
+      }
+      videoTrack.samples.push(VideoSample);
+    }
+  }
+  parseNALu(track, array, endOfSegment) {
+    const len = array.byteLength;
+    let state = track.naluState || 0;
+    const lastState = state;
+    const units = [];
+    let i = 0;
+    let value;
+    let overflow;
+    let unitType;
+    let lastUnitStart = -1;
+    let lastUnitType = 0;
+    // logger.log('PES:' + Hex.hexDump(array));
+
+    if (state === -1) {
+      // special use case where we found 3 or 4-byte start codes exactly at the end of previous PES packet
+      lastUnitStart = 0;
+      // NALu type is value read from offset 0
+      lastUnitType = this.getNALuType(array, 0);
+      state = 0;
+      i = 1;
+    }
+    while (i < len) {
+      value = array[i++];
+      // optimization. state 0 and 1 are the predominant case. let's handle them outside of the switch/case
+      if (!state) {
+        state = value ? 0 : 1;
+        continue;
+      }
+      if (state === 1) {
+        state = value ? 0 : 2;
+        continue;
+      }
+      // here we have state either equal to 2 or 3
+      if (!value) {
+        state = 3;
+      } else if (value === 1) {
+        overflow = i - state - 1;
+        if (lastUnitStart >= 0) {
+          const unit = {
+            data: array.subarray(lastUnitStart, overflow),
+            type: lastUnitType
+          };
+          // logger.log('pushing NALU, type/size:' + unit.type + '/' + unit.data.byteLength);
+          units.push(unit);
+        } else {
+          // lastUnitStart is undefined => this is the first start code found in this PES packet
+          // first check if start code delimiter is overlapping between 2 PES packets,
+          // ie it started in last packet (lastState not zero)
+          // and ended at the beginning of this PES packet (i <= 4 - lastState)
+          const lastUnit = this.getLastNalUnit(track.samples);
+          if (lastUnit) {
+            if (lastState && i <= 4 - lastState) {
+              // start delimiter overlapping between PES packets
+              // strip start delimiter bytes from the end of last NAL unit
+              // check if lastUnit had a state different from zero
+              if (lastUnit.state) {
+                // strip last bytes
+                lastUnit.data = lastUnit.data.subarray(0, lastUnit.data.byteLength - lastState);
+              }
+            }
+            // If NAL units are not starting right at the beginning of the PES packet, push preceding data into previous NAL unit.
+
+            if (overflow > 0) {
+              // logger.log('first NALU found with overflow:' + overflow);
+              lastUnit.data = appendUint8Array(lastUnit.data, array.subarray(0, overflow));
+              lastUnit.state = 0;
+            }
+          }
+        }
+        // check if we can read unit type
+        if (i < len) {
+          unitType = this.getNALuType(array, i);
+          // logger.log('find NALU @ offset:' + i + ',type:' + unitType);
+          lastUnitStart = i;
+          lastUnitType = unitType;
+          state = 0;
+        } else {
+          // not enough byte to read unit type. let's read it on next PES parsing
+          state = -1;
+        }
+      } else {
+        state = 0;
+      }
+    }
+    if (lastUnitStart >= 0 && state >= 0) {
+      const unit = {
+        data: array.subarray(lastUnitStart, len),
+        type: lastUnitType,
+        state: state
+      };
+      units.push(unit);
+      // logger.log('pushing NALU, type/size/state:' + unit.type + '/' + unit.data.byteLength + '/' + state);
+    }
+    // no NALu found
+    if (units.length === 0) {
+      // append pes.data to previous NAL unit
+      const lastUnit = this.getLastNalUnit(track.samples);
+      if (lastUnit) {
+        lastUnit.data = appendUint8Array(lastUnit.data, array);
+      }
+    }
+    track.naluState = state;
+    return units;
+  }
+}
+
+/**
+ * Parser for exponential Golomb codes, a variable-bitwidth number encoding scheme used by h264.
+ */
+
+class ExpGolomb {
+  constructor(data) {
+    this.data = void 0;
+    this.bytesAvailable = void 0;
+    this.word = void 0;
+    this.bitsAvailable = void 0;
+    this.data = data;
+    // the number of bytes left to examine in this.data
+    this.bytesAvailable = data.byteLength;
+    // the current word being examined
+    this.word = 0; // :uint
+    // the number of bits left to examine in the current word
+    this.bitsAvailable = 0; // :uint
+  }
+
+  // ():void
+  loadWord() {
+    const data = this.data;
+    const bytesAvailable = this.bytesAvailable;
+    const position = data.byteLength - bytesAvailable;
+    const workingBytes = new Uint8Array(4);
+    const availableBytes = Math.min(4, bytesAvailable);
+    if (availableBytes === 0) {
+      throw new Error('no bytes available');
+    }
+    workingBytes.set(data.subarray(position, position + availableBytes));
+    this.word = new DataView(workingBytes.buffer).getUint32(0);
+    // track the amount of this.data that has been processed
+    this.bitsAvailable = availableBytes * 8;
+    this.bytesAvailable -= availableBytes;
+  }
+
+  // (count:int):void
+  skipBits(count) {
+    let skipBytes; // :int
+    count = Math.min(count, this.bytesAvailable * 8 + this.bitsAvailable);
+    if (this.bitsAvailable > count) {
+      this.word <<= count;
+      this.bitsAvailable -= count;
+    } else {
+      count -= this.bitsAvailable;
+      skipBytes = count >> 3;
+      count -= skipBytes << 3;
+      this.bytesAvailable -= skipBytes;
+      this.loadWord();
+      this.word <<= count;
+      this.bitsAvailable -= count;
+    }
+  }
+
+  // (size:int):uint
+  readBits(size) {
+    let bits = Math.min(this.bitsAvailable, size); // :uint
+    const valu = this.word >>> 32 - bits; // :uint
+    if (size > 32) {
+      logger.error('Cannot read more than 32 bits at a time');
+    }
+    this.bitsAvailable -= bits;
+    if (this.bitsAvailable > 0) {
+      this.word <<= bits;
+    } else if (this.bytesAvailable > 0) {
+      this.loadWord();
+    } else {
+      throw new Error('no bits available');
+    }
+    bits = size - bits;
+    if (bits > 0 && this.bitsAvailable) {
+      return valu << bits | this.readBits(bits);
+    } else {
+      return valu;
+    }
+  }
+
+  // ():uint
+  skipLZ() {
+    let leadingZeroCount; // :uint
+    for (leadingZeroCount = 0; leadingZeroCount < this.bitsAvailable; ++leadingZeroCount) {
+      if ((this.word & 0x80000000 >>> leadingZeroCount) !== 0) {
+        // the first bit of working word is 1
+        this.word <<= leadingZeroCount;
+        this.bitsAvailable -= leadingZeroCount;
+        return leadingZeroCount;
+      }
+    }
+    // we exhausted word and still have not found a 1
+    this.loadWord();
+    return leadingZeroCount + this.skipLZ();
+  }
+
+  // ():void
+  skipUEG() {
+    this.skipBits(1 + this.skipLZ());
+  }
+
+  // ():void
+  skipEG() {
+    this.skipBits(1 + this.skipLZ());
+  }
+
+  // ():uint
+  readUEG() {
+    const clz = this.skipLZ(); // :uint
+    return this.readBits(clz + 1) - 1;
+  }
+
+  // ():int
+  readEG() {
+    const valu = this.readUEG(); // :int
+    if (0x01 & valu) {
+      // the number is odd if the low order bit is set
+      return 1 + valu >>> 1; // add 1 to make it even, and divide by 2
+    } else {
+      return -1 * (valu >>> 1); // divide by two then make it negative
+    }
+  }
+
+  // Some convenience functions
+  // :Boolean
+  readBoolean() {
+    return this.readBits(1) === 1;
+  }
+
+  // ():int
+  readUByte() {
+    return this.readBits(8);
+  }
+
+  // ():int
+  readUShort() {
+    return this.readBits(16);
+  }
+
+  // ():int
+  readUInt() {
+    return this.readBits(32);
+  }
+}
+
+class AvcVideoParser extends BaseVideoParser {
+  parsePES(track, textTrack, pes, endOfSegment) {
+    const units = this.parseNALu(track, pes.data, endOfSegment);
+    let VideoSample = this.VideoSample;
+    let push;
+    let spsfound = false;
+    // free pes.data to save up some memory
+    pes.data = null;
+
+    // if new NAL units found and last sample still there, let's push ...
+    // this helps parsing streams with missing AUD (only do this if AUD never found)
+    if (VideoSample && units.length && !track.audFound) {
+      this.pushAccessUnit(VideoSample, track);
+      VideoSample = this.VideoSample = this.createVideoSample(false, pes.pts, pes.dts);
+    }
+    units.forEach(unit => {
+      var _VideoSample2, _VideoSample3;
+      switch (unit.type) {
+        // NDR
+        case 1:
+          {
+            let iskey = false;
+            push = true;
+            const data = unit.data;
+            // only check slice type to detect KF in case SPS found in same packet (any keyframe is preceded by SPS ...)
+            if (spsfound && data.length > 4) {
+              // retrieve slice type by parsing beginning of NAL unit (follow H264 spec, slice_header definition) to detect keyframe embedded in NDR
+              const sliceType = this.readSliceType(data);
+              // 2 : I slice, 4 : SI slice, 7 : I slice, 9: SI slice
+              // SI slice : A slice that is coded using intra prediction only and using quantisation of the prediction samples.
+              // An SI slice can be coded such that its decoded samples can be constructed identically to an SP slice.
+              // I slice: A slice that is not an SI slice that is decoded using intra prediction only.
+              // if (sliceType === 2 || sliceType === 7) {
+              if (sliceType === 2 || sliceType === 4 || sliceType === 7 || sliceType === 9) {
+                iskey = true;
+              }
+            }
+            if (iskey) {
+              var _VideoSample;
+              // if we have non-keyframe data already, that cannot belong to the same frame as a keyframe, so force a push
+              if ((_VideoSample = VideoSample) != null && _VideoSample.frame && !VideoSample.key) {
+                this.pushAccessUnit(VideoSample, track);
+                VideoSample = this.VideoSample = null;
+              }
+            }
+            if (!VideoSample) {
+              VideoSample = this.VideoSample = this.createVideoSample(true, pes.pts, pes.dts);
+            }
+            VideoSample.frame = true;
+            VideoSample.key = iskey;
+            break;
+            // IDR
+          }
+        case 5:
+          push = true;
+          // handle PES not starting with AUD
+          // if we have frame data already, that cannot belong to the same frame, so force a push
+          if ((_VideoSample2 = VideoSample) != null && _VideoSample2.frame && !VideoSample.key) {
+            this.pushAccessUnit(VideoSample, track);
+            VideoSample = this.VideoSample = null;
+          }
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(true, pes.pts, pes.dts);
+          }
+          VideoSample.key = true;
+          VideoSample.frame = true;
+          break;
+        // SEI
+        case 6:
+          {
+            push = true;
+            parseSEIMessageFromNALu(unit.data, 1, pes.pts, textTrack.samples);
+            break;
+            // SPS
+          }
+        case 7:
+          {
+            var _track$pixelRatio, _track$pixelRatio2;
+            push = true;
+            spsfound = true;
+            const sps = unit.data;
+            const config = this.readSPS(sps);
+            if (!track.sps || track.width !== config.width || track.height !== config.height || ((_track$pixelRatio = track.pixelRatio) == null ? void 0 : _track$pixelRatio[0]) !== config.pixelRatio[0] || ((_track$pixelRatio2 = track.pixelRatio) == null ? void 0 : _track$pixelRatio2[1]) !== config.pixelRatio[1]) {
+              track.width = config.width;
+              track.height = config.height;
+              track.pixelRatio = config.pixelRatio;
+              track.sps = [sps];
+              const codecarray = sps.subarray(1, 4);
+              let codecstring = 'avc1.';
+              for (let i = 0; i < 3; i++) {
+                let h = codecarray[i].toString(16);
+                if (h.length < 2) {
+                  h = '0' + h;
+                }
+                codecstring += h;
+              }
+              track.codec = codecstring;
+            }
+            break;
+          }
+        // PPS
+        case 8:
+          push = true;
+          track.pps = [unit.data];
+          break;
+        // AUD
+        case 9:
+          push = true;
+          track.audFound = true;
+          if ((_VideoSample3 = VideoSample) != null && _VideoSample3.frame) {
+            this.pushAccessUnit(VideoSample, track);
+            VideoSample = null;
+          }
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(false, pes.pts, pes.dts);
+          }
+          break;
+        // Filler Data
+        case 12:
+          push = true;
+          break;
+        default:
+          push = false;
+          break;
+      }
+      if (VideoSample && push) {
+        const units = VideoSample.units;
+        units.push(unit);
+      }
+    });
+    // if last PES packet, push samples
+    if (endOfSegment && VideoSample) {
+      this.pushAccessUnit(VideoSample, track);
+      this.VideoSample = null;
+    }
+  }
+  getNALuType(data, offset) {
+    return data[offset] & 0x1f;
+  }
+  readSliceType(data) {
+    const eg = new ExpGolomb(data);
+    // skip NALu type
+    eg.readUByte();
+    // discard first_mb_in_slice
+    eg.readUEG();
+    // return slice_type
+    return eg.readUEG();
+  }
+
+  /**
+   * The scaling list is optionally transmitted as part of a sequence parameter
+   * set and is not relevant to transmuxing.
+   * @param count the number of entries in this scaling list
+   * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1
+   */
+  skipScalingList(count, reader) {
+    let lastScale = 8;
+    let nextScale = 8;
+    let deltaScale;
+    for (let j = 0; j < count; j++) {
+      if (nextScale !== 0) {
+        deltaScale = reader.readEG();
+        nextScale = (lastScale + deltaScale + 256) % 256;
+      }
+      lastScale = nextScale === 0 ? lastScale : nextScale;
+    }
+  }
+
+  /**
+   * Read a sequence parameter set and return some interesting video
+   * properties. A sequence parameter set is the H264 metadata that
+   * describes the properties of upcoming video frames.
+   * @returns an object with configuration parsed from the
+   * sequence parameter set, including the dimensions of the
+   * associated video frames.
+   */
+  readSPS(sps) {
+    const eg = new ExpGolomb(sps);
+    let frameCropLeftOffset = 0;
+    let frameCropRightOffset = 0;
+    let frameCropTopOffset = 0;
+    let frameCropBottomOffset = 0;
+    let numRefFramesInPicOrderCntCycle;
+    let scalingListCount;
+    let i;
+    const readUByte = eg.readUByte.bind(eg);
+    const readBits = eg.readBits.bind(eg);
+    const readUEG = eg.readUEG.bind(eg);
+    const readBoolean = eg.readBoolean.bind(eg);
+    const skipBits = eg.skipBits.bind(eg);
+    const skipEG = eg.skipEG.bind(eg);
+    const skipUEG = eg.skipUEG.bind(eg);
+    const skipScalingList = this.skipScalingList.bind(this);
+    readUByte();
+    const profileIdc = readUByte(); // profile_idc
+    readBits(5); // profileCompat constraint_set[0-4]_flag, u(5)
+    skipBits(3); // reserved_zero_3bits u(3),
+    readUByte(); // level_idc u(8)
+    skipUEG(); // seq_parameter_set_id
+    // some profiles have more optional data we don't need
+    if (profileIdc === 100 || profileIdc === 110 || profileIdc === 122 || profileIdc === 244 || profileIdc === 44 || profileIdc === 83 || profileIdc === 86 || profileIdc === 118 || profileIdc === 128) {
+      const chromaFormatIdc = readUEG();
+      if (chromaFormatIdc === 3) {
+        skipBits(1);
+      } // separate_colour_plane_flag
+
+      skipUEG(); // bit_depth_luma_minus8
+      skipUEG(); // bit_depth_chroma_minus8
+      skipBits(1); // qpprime_y_zero_transform_bypass_flag
+      if (readBoolean()) {
+        // seq_scaling_matrix_present_flag
+        scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;
+        for (i = 0; i < scalingListCount; i++) {
+          if (readBoolean()) {
+            // seq_scaling_list_present_flag[ i ]
+            if (i < 6) {
+              skipScalingList(16, eg);
+            } else {
+              skipScalingList(64, eg);
+            }
+          }
+        }
+      }
+    }
+    skipUEG(); // log2_max_frame_num_minus4
+    const picOrderCntType = readUEG();
+    if (picOrderCntType === 0) {
+      readUEG(); // log2_max_pic_order_cnt_lsb_minus4
+    } else if (picOrderCntType === 1) {
+      skipBits(1); // delta_pic_order_always_zero_flag
+      skipEG(); // offset_for_non_ref_pic
+      skipEG(); // offset_for_top_to_bottom_field
+      numRefFramesInPicOrderCntCycle = readUEG();
+      for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {
+        skipEG();
+      } // offset_for_ref_frame[ i ]
+    }
+    skipUEG(); // max_num_ref_frames
+    skipBits(1); // gaps_in_frame_num_value_allowed_flag
+    const picWidthInMbsMinus1 = readUEG();
+    const picHeightInMapUnitsMinus1 = readUEG();
+    const frameMbsOnlyFlag = readBits(1);
+    if (frameMbsOnlyFlag === 0) {
+      skipBits(1);
+    } // mb_adaptive_frame_field_flag
+
+    skipBits(1); // direct_8x8_inference_flag
+    if (readBoolean()) {
+      // frame_cropping_flag
+      frameCropLeftOffset = readUEG();
+      frameCropRightOffset = readUEG();
+      frameCropTopOffset = readUEG();
+      frameCropBottomOffset = readUEG();
+    }
+    let pixelRatio = [1, 1];
+    if (readBoolean()) {
+      // vui_parameters_present_flag
+      if (readBoolean()) {
+        // aspect_ratio_info_present_flag
+        const aspectRatioIdc = readUByte();
+        switch (aspectRatioIdc) {
+          case 1:
+            pixelRatio = [1, 1];
+            break;
+          case 2:
+            pixelRatio = [12, 11];
+            break;
+          case 3:
+            pixelRatio = [10, 11];
+            break;
+          case 4:
+            pixelRatio = [16, 11];
+            break;
+          case 5:
+            pixelRatio = [40, 33];
+            break;
+          case 6:
+            pixelRatio = [24, 11];
+            break;
+          case 7:
+            pixelRatio = [20, 11];
+            break;
+          case 8:
+            pixelRatio = [32, 11];
+            break;
+          case 9:
+            pixelRatio = [80, 33];
+            break;
+          case 10:
+            pixelRatio = [18, 11];
+            break;
+          case 11:
+            pixelRatio = [15, 11];
+            break;
+          case 12:
+            pixelRatio = [64, 33];
+            break;
+          case 13:
+            pixelRatio = [160, 99];
+            break;
+          case 14:
+            pixelRatio = [4, 3];
+            break;
+          case 15:
+            pixelRatio = [3, 2];
+            break;
+          case 16:
+            pixelRatio = [2, 1];
+            break;
+          case 255:
+            {
+              pixelRatio = [readUByte() << 8 | readUByte(), readUByte() << 8 | readUByte()];
+              break;
+            }
+        }
+      }
+    }
+    return {
+      width: Math.ceil((picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2),
+      height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - (frameMbsOnlyFlag ? 2 : 4) * (frameCropTopOffset + frameCropBottomOffset),
+      pixelRatio: pixelRatio
+    };
+  }
+}
+
+class HevcVideoParser extends BaseVideoParser {
+  constructor(...args) {
+    super(...args);
+    this.initVPS = null;
+  }
+  parsePES(track, textTrack, pes, endOfSegment) {
+    const units = this.parseNALu(track, pes.data, endOfSegment);
+    let VideoSample = this.VideoSample;
+    let push;
+    let spsfound = false;
+    // free pes.data to save up some memory
+    pes.data = null;
+
+    // if new NAL units found and last sample still there, let's push ...
+    // this helps parsing streams with missing AUD (only do this if AUD never found)
+    if (VideoSample && units.length && !track.audFound) {
+      this.pushAccessUnit(VideoSample, track);
+      VideoSample = this.VideoSample = this.createVideoSample(false, pes.pts, pes.dts);
+    }
+    units.forEach(unit => {
+      var _VideoSample2, _VideoSample3;
+      switch (unit.type) {
+        // NON-IDR, NON RANDOM ACCESS SLICE
+        case 0:
+        case 1:
+        case 2:
+        case 3:
+        case 4:
+        case 5:
+        case 6:
+        case 7:
+        case 8:
+        case 9:
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(false, pes.pts, pes.dts);
+          }
+          VideoSample.frame = true;
+          push = true;
+          break;
+
+        // CRA, BLA (random access picture)
+        case 16:
+        case 17:
+        case 18:
+        case 21:
+          push = true;
+          if (spsfound) {
+            var _VideoSample;
+            // handle PES not starting with AUD
+            // if we have frame data already, that cannot belong to the same frame, so force a push
+            if ((_VideoSample = VideoSample) != null && _VideoSample.frame && !VideoSample.key) {
+              this.pushAccessUnit(VideoSample, track);
+              VideoSample = this.VideoSample = null;
+            }
+          }
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(true, pes.pts, pes.dts);
+          }
+          VideoSample.key = true;
+          VideoSample.frame = true;
+          break;
+
+        // IDR
+        case 19:
+        case 20:
+          push = true;
+          // handle PES not starting with AUD
+          // if we have frame data already, that cannot belong to the same frame, so force a push
+          if ((_VideoSample2 = VideoSample) != null && _VideoSample2.frame && !VideoSample.key) {
+            this.pushAccessUnit(VideoSample, track);
+            VideoSample = this.VideoSample = null;
+          }
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(true, pes.pts, pes.dts);
+          }
+          VideoSample.key = true;
+          VideoSample.frame = true;
+          break;
+
+        // SEI
+        case 39:
+          push = true;
+          parseSEIMessageFromNALu(unit.data, 2,
+          // NALu header size
+          pes.pts, textTrack.samples);
+          break;
+
+        // VPS
+        case 32:
+          push = true;
+          if (!track.vps) {
+            if (typeof track.params !== 'object') {
+              track.params = {};
+            }
+            track.params = _extends(track.params, this.readVPS(unit.data));
+            this.initVPS = unit.data;
+          }
+          track.vps = [unit.data];
+          break;
+
+        // SPS
+        case 33:
+          push = true;
+          spsfound = true;
+          if (track.vps !== undefined && track.vps[0] !== this.initVPS && track.sps !== undefined && !this.matchSPS(track.sps[0], unit.data)) {
+            this.initVPS = track.vps[0];
+            track.sps = track.pps = undefined;
+          }
+          if (!track.sps) {
+            const config = this.readSPS(unit.data);
+            track.width = config.width;
+            track.height = config.height;
+            track.pixelRatio = config.pixelRatio;
+            track.codec = config.codecString;
+            track.sps = [];
+            if (typeof track.params !== 'object') {
+              track.params = {};
+            }
+            for (const prop in config.params) {
+              track.params[prop] = config.params[prop];
+            }
+          }
+          this.pushParameterSet(track.sps, unit.data, track.vps);
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(true, pes.pts, pes.dts);
+          }
+          VideoSample.key = true;
+          break;
+
+        // PPS
+        case 34:
+          push = true;
+          if (typeof track.params === 'object') {
+            if (!track.pps) {
+              track.pps = [];
+              const config = this.readPPS(unit.data);
+              for (const prop in config) {
+                track.params[prop] = config[prop];
+              }
+            }
+            this.pushParameterSet(track.pps, unit.data, track.vps);
+          }
+          break;
+
+        // ACCESS UNIT DELIMITER
+        case 35:
+          push = true;
+          track.audFound = true;
+          if ((_VideoSample3 = VideoSample) != null && _VideoSample3.frame) {
+            this.pushAccessUnit(VideoSample, track);
+            VideoSample = null;
+          }
+          if (!VideoSample) {
+            VideoSample = this.VideoSample = this.createVideoSample(false, pes.pts, pes.dts);
+          }
+          break;
+        default:
+          push = false;
+          break;
+      }
+      if (VideoSample && push) {
+        const units = VideoSample.units;
+        units.push(unit);
+      }
+    });
+    // if last PES packet, push samples
+    if (endOfSegment && VideoSample) {
+      this.pushAccessUnit(VideoSample, track);
+      this.VideoSample = null;
+    }
+  }
+  pushParameterSet(parameterSets, data, vps) {
+    if (vps && vps[0] === this.initVPS || !vps && !parameterSets.length) {
+      parameterSets.push(data);
+    }
+  }
+  getNALuType(data, offset) {
+    return (data[offset] & 0x7e) >>> 1;
+  }
+  ebsp2rbsp(arr) {
+    const dst = new Uint8Array(arr.byteLength);
+    let dstIdx = 0;
+    for (let i = 0; i < arr.byteLength; i++) {
+      if (i >= 2) {
+        // Unescape: Skip 0x03 after 00 00
+        if (arr[i] === 0x03 && arr[i - 1] === 0x00 && arr[i - 2] === 0x00) {
+          continue;
+        }
+      }
+      dst[dstIdx] = arr[i];
+      dstIdx++;
+    }
+    return new Uint8Array(dst.buffer, 0, dstIdx);
+  }
+  pushAccessUnit(VideoSample, videoTrack) {
+    super.pushAccessUnit(VideoSample, videoTrack);
+    if (this.initVPS) {
+      this.initVPS = null; // null initVPS to prevent possible track's sps/pps growth until next VPS
+    }
+  }
+  readVPS(vps) {
+    const eg = new ExpGolomb(vps);
+    // remove header
+    eg.readUByte();
+    eg.readUByte();
+    eg.readBits(4); // video_parameter_set_id
+    eg.skipBits(2);
+    eg.readBits(6); // max_layers_minus1
+    const max_sub_layers_minus1 = eg.readBits(3);
+    const temporal_id_nesting_flag = eg.readBoolean();
+    // ...vui fps can be here, but empty fps value is not critical for metadata
+
+    return {
+      numTemporalLayers: max_sub_layers_minus1 + 1,
+      temporalIdNested: temporal_id_nesting_flag
+    };
+  }
+  readSPS(sps) {
+    const eg = new ExpGolomb(this.ebsp2rbsp(sps));
+    eg.readUByte();
+    eg.readUByte();
+    eg.readBits(4); //video_parameter_set_id
+    const max_sub_layers_minus1 = eg.readBits(3);
+    eg.readBoolean(); // temporal_id_nesting_flag
+
+    // profile_tier_level
+    const general_profile_space = eg.readBits(2);
+    const general_tier_flag = eg.readBoolean();
+    const general_profile_idc = eg.readBits(5);
+    const general_profile_compatibility_flags_1 = eg.readUByte();
+    const general_profile_compatibility_flags_2 = eg.readUByte();
+    const general_profile_compatibility_flags_3 = eg.readUByte();
+    const general_profile_compatibility_flags_4 = eg.readUByte();
+    const general_constraint_indicator_flags_1 = eg.readUByte();
+    const general_constraint_indicator_flags_2 = eg.readUByte();
+    const general_constraint_indicator_flags_3 = eg.readUByte();
+    const general_constraint_indicator_flags_4 = eg.readUByte();
+    const general_constraint_indicator_flags_5 = eg.readUByte();
+    const general_constraint_indicator_flags_6 = eg.readUByte();
+    const general_level_idc = eg.readUByte();
+    const sub_layer_profile_present_flags = [];
+    const sub_layer_level_present_flags = [];
+    for (let i = 0; i < max_sub_layers_minus1; i++) {
+      sub_layer_profile_present_flags.push(eg.readBoolean());
+      sub_layer_level_present_flags.push(eg.readBoolean());
+    }
+    if (max_sub_layers_minus1 > 0) {
+      for (let i = max_sub_layers_minus1; i < 8; i++) {
+        eg.readBits(2);
+      }
+    }
+    for (let i = 0; i < max_sub_layers_minus1; i++) {
+      if (sub_layer_profile_present_flags[i]) {
+        eg.readUByte(); // sub_layer_profile_space, sub_layer_tier_flag, sub_layer_profile_idc
+        eg.readUByte();
+        eg.readUByte();
+        eg.readUByte();
+        eg.readUByte(); // sub_layer_profile_compatibility_flag
+        eg.readUByte();
+        eg.readUByte();
+        eg.readUByte();
+        eg.readUByte();
+        eg.readUByte();
+        eg.readUByte();
+      }
+      if (sub_layer_level_present_flags[i]) {
+        eg.readUByte();
+      }
+    }
+    eg.readUEG(); // seq_parameter_set_id
+    const chroma_format_idc = eg.readUEG();
+    if (chroma_format_idc == 3) {
+      eg.skipBits(1); //separate_colour_plane_flag
+    }
+    const pic_width_in_luma_samples = eg.readUEG();
+    const pic_height_in_luma_samples = eg.readUEG();
+    const conformance_window_flag = eg.readBoolean();
+    let pic_left_offset = 0,
+      pic_right_offset = 0,
+      pic_top_offset = 0,
+      pic_bottom_offset = 0;
+    if (conformance_window_flag) {
+      pic_left_offset += eg.readUEG();
+      pic_right_offset += eg.readUEG();
+      pic_top_offset += eg.readUEG();
+      pic_bottom_offset += eg.readUEG();
+    }
+    const bit_depth_luma_minus8 = eg.readUEG();
+    const bit_depth_chroma_minus8 = eg.readUEG();
+    const log2_max_pic_order_cnt_lsb_minus4 = eg.readUEG();
+    const sub_layer_ordering_info_present_flag = eg.readBoolean();
+    for (let i = sub_layer_ordering_info_present_flag ? 0 : max_sub_layers_minus1; i <= max_sub_layers_minus1; i++) {
+      eg.skipUEG(); // max_dec_pic_buffering_minus1[i]
+      eg.skipUEG(); // max_num_reorder_pics[i]
+      eg.skipUEG(); // max_latency_increase_plus1[i]
+    }
+    eg.skipUEG(); // log2_min_luma_coding_block_size_minus3
+    eg.skipUEG(); // log2_diff_max_min_luma_coding_block_size
+    eg.skipUEG(); // log2_min_transform_block_size_minus2
+    eg.skipUEG(); // log2_diff_max_min_transform_block_size
+    eg.skipUEG(); // max_transform_hierarchy_depth_inter
+    eg.skipUEG(); // max_transform_hierarchy_depth_intra
+    const scaling_list_enabled_flag = eg.readBoolean();
+    if (scaling_list_enabled_flag) {
+      const sps_scaling_list_data_present_flag = eg.readBoolean();
+      if (sps_scaling_list_data_present_flag) {
+        for (let sizeId = 0; sizeId < 4; sizeId++) {
+          for (let matrixId = 0; matrixId < (sizeId === 3 ? 2 : 6); matrixId++) {
+            const scaling_list_pred_mode_flag = eg.readBoolean();
+            if (!scaling_list_pred_mode_flag) {
+              eg.readUEG(); // scaling_list_pred_matrix_id_delta
+            } else {
+              const coefNum = Math.min(64, 1 << 4 + (sizeId << 1));
+              if (sizeId > 1) {
+                eg.readEG();
+              }
+              for (let i = 0; i < coefNum; i++) {
+                eg.readEG();
+              }
+            }
+          }
+        }
+      }
+    }
+    eg.readBoolean(); // amp_enabled_flag
+    eg.readBoolean(); // sample_adaptive_offset_enabled_flag
+    const pcm_enabled_flag = eg.readBoolean();
+    if (pcm_enabled_flag) {
+      eg.readUByte();
+      eg.skipUEG();
+      eg.skipUEG();
+      eg.readBoolean();
+    }
+    const num_short_term_ref_pic_sets = eg.readUEG();
+    let num_delta_pocs = 0;
+    for (let i = 0; i < num_short_term_ref_pic_sets; i++) {
+      let inter_ref_pic_set_prediction_flag = false;
+      if (i !== 0) {
+        inter_ref_pic_set_prediction_flag = eg.readBoolean();
+      }
+      if (inter_ref_pic_set_prediction_flag) {
+        if (i === num_short_term_ref_pic_sets) {
+          eg.readUEG();
+        }
+        eg.readBoolean();
+        eg.readUEG();
+        let next_num_delta_pocs = 0;
+        for (let j = 0; j <= num_delta_pocs; j++) {
+          const used_by_curr_pic_flag = eg.readBoolean();
+          let use_delta_flag = false;
+          if (!used_by_curr_pic_flag) {
+            use_delta_flag = eg.readBoolean();
+          }
+          if (used_by_curr_pic_flag || use_delta_flag) {
+            next_num_delta_pocs++;
+          }
+        }
+        num_delta_pocs = next_num_delta_pocs;
+      } else {
+        const num_negative_pics = eg.readUEG();
+        const num_positive_pics = eg.readUEG();
+        num_delta_pocs = num_negative_pics + num_positive_pics;
+        for (let j = 0; j < num_negative_pics; j++) {
+          eg.readUEG();
+          eg.readBoolean();
+        }
+        for (let j = 0; j < num_positive_pics; j++) {
+          eg.readUEG();
+          eg.readBoolean();
+        }
+      }
+    }
+    const long_term_ref_pics_present_flag = eg.readBoolean();
+    if (long_term_ref_pics_present_flag) {
+      const num_long_term_ref_pics_sps = eg.readUEG();
+      for (let i = 0; i < num_long_term_ref_pics_sps; i++) {
+        for (let j = 0; j < log2_max_pic_order_cnt_lsb_minus4 + 4; j++) {
+          eg.readBits(1);
+        }
+        eg.readBits(1);
+      }
+    }
+    let min_spatial_segmentation_idc = 0;
+    let sar_width = 1,
+      sar_height = 1;
+    let fps_fixed = true,
+      fps_den = 1,
+      fps_num = 0;
+    eg.readBoolean(); // sps_temporal_mvp_enabled_flag
+    eg.readBoolean(); // strong_intra_smoothing_enabled_flag
+    let default_display_window_flag = false;
+    const vui_parameters_present_flag = eg.readBoolean();
+    if (vui_parameters_present_flag) {
+      const aspect_ratio_info_present_flag = eg.readBoolean();
+      if (aspect_ratio_info_present_flag) {
+        const aspect_ratio_idc = eg.readUByte();
+        const sar_width_table = [1, 12, 10, 16, 40, 24, 20, 32, 80, 18, 15, 64, 160, 4, 3, 2];
+        const sar_height_table = [1, 11, 11, 11, 33, 11, 11, 11, 33, 11, 11, 33, 99, 3, 2, 1];
+        if (aspect_ratio_idc > 0 && aspect_ratio_idc < 16) {
+          sar_width = sar_width_table[aspect_ratio_idc - 1];
+          sar_height = sar_height_table[aspect_ratio_idc - 1];
+        } else if (aspect_ratio_idc === 255) {
+          sar_width = eg.readBits(16);
+          sar_height = eg.readBits(16);
+        }
+      }
+      const overscan_info_present_flag = eg.readBoolean();
+      if (overscan_info_present_flag) {
+        eg.readBoolean();
+      }
+      const video_signal_type_present_flag = eg.readBoolean();
+      if (video_signal_type_present_flag) {
+        eg.readBits(3);
+        eg.readBoolean();
+        const colour_description_present_flag = eg.readBoolean();
+        if (colour_description_present_flag) {
+          eg.readUByte();
+          eg.readUByte();
+          eg.readUByte();
+        }
+      }
+      const chroma_loc_info_present_flag = eg.readBoolean();
+      if (chroma_loc_info_present_flag) {
+        eg.readUEG();
+        eg.readUEG();
+      }
+      eg.readBoolean(); // neutral_chroma_indication_flag
+      eg.readBoolean(); // field_seq_flag
+      eg.readBoolean(); // frame_field_info_present_flag
+      default_display_window_flag = eg.readBoolean();
+      if (default_display_window_flag) {
+        eg.skipUEG();
+        eg.skipUEG();
+        eg.skipUEG();
+        eg.skipUEG();
+      }
+      const vui_timing_info_present_flag = eg.readBoolean();
+      if (vui_timing_info_present_flag) {
+        fps_den = eg.readBits(32);
+        fps_num = eg.readBits(32);
+        const vui_poc_proportional_to_timing_flag = eg.readBoolean();
+        if (vui_poc_proportional_to_timing_flag) {
+          eg.readUEG();
+        }
+        const vui_hrd_parameters_present_flag = eg.readBoolean();
+        if (vui_hrd_parameters_present_flag) {
+          //const commonInfPresentFlag = true;
+          //if (commonInfPresentFlag) {
+          const nal_hrd_parameters_present_flag = eg.readBoolean();
+          const vcl_hrd_parameters_present_flag = eg.readBoolean();
+          let sub_pic_hrd_params_present_flag = false;
+          if (nal_hrd_parameters_present_flag || vcl_hrd_parameters_present_flag) {
+            sub_pic_hrd_params_present_flag = eg.readBoolean();
+            if (sub_pic_hrd_params_present_flag) {
+              eg.readUByte();
+              eg.readBits(5);
+              eg.readBoolean();
+              eg.readBits(5);
+            }
+            eg.readBits(4); // bit_rate_scale
+            eg.readBits(4); // cpb_size_scale
+            if (sub_pic_hrd_params_present_flag) {
+              eg.readBits(4);
+            }
+            eg.readBits(5);
+            eg.readBits(5);
+            eg.readBits(5);
+          }
+          //}
+          for (let i = 0; i <= max_sub_layers_minus1; i++) {
+            fps_fixed = eg.readBoolean(); // fixed_pic_rate_general_flag
+            const fixed_pic_rate_within_cvs_flag = fps_fixed || eg.readBoolean();
+            let low_delay_hrd_flag = false;
+            if (fixed_pic_rate_within_cvs_flag) {
+              eg.readEG();
+            } else {
+              low_delay_hrd_flag = eg.readBoolean();
+            }
+            const cpb_cnt = low_delay_hrd_flag ? 1 : eg.readUEG() + 1;
+            if (nal_hrd_parameters_present_flag) {
+              for (let j = 0; j < cpb_cnt; j++) {
+                eg.readUEG();
+                eg.readUEG();
+                if (sub_pic_hrd_params_present_flag) {
+                  eg.readUEG();
+                  eg.readUEG();
+                }
+                eg.skipBits(1);
+              }
+            }
+            if (vcl_hrd_parameters_present_flag) {
+              for (let j = 0; j < cpb_cnt; j++) {
+                eg.readUEG();
+                eg.readUEG();
+                if (sub_pic_hrd_params_present_flag) {
+                  eg.readUEG();
+                  eg.readUEG();
+                }
+                eg.skipBits(1);
+              }
+            }
+          }
+        }
+      }
+      const bitstream_restriction_flag = eg.readBoolean();
+      if (bitstream_restriction_flag) {
+        eg.readBoolean(); // tiles_fixed_structure_flag
+        eg.readBoolean(); // motion_vectors_over_pic_boundaries_flag
+        eg.readBoolean(); // restricted_ref_pic_lists_flag
+        min_spatial_segmentation_idc = eg.readUEG();
+      }
+    }
+    let width = pic_width_in_luma_samples,
+      height = pic_height_in_luma_samples;
+    if (conformance_window_flag) {
+      let chroma_scale_w = 1,
+        chroma_scale_h = 1;
+      if (chroma_format_idc === 1) {
+        // YUV 420
+        chroma_scale_w = chroma_scale_h = 2;
+      } else if (chroma_format_idc == 2) {
+        // YUV 422
+        chroma_scale_w = 2;
+      }
+      width = pic_width_in_luma_samples - chroma_scale_w * pic_right_offset - chroma_scale_w * pic_left_offset;
+      height = pic_height_in_luma_samples - chroma_scale_h * pic_bottom_offset - chroma_scale_h * pic_top_offset;
+    }
+    const profile_space_string = general_profile_space ? ['A', 'B', 'C'][general_profile_space] : '';
+    const profile_compatibility_buf = general_profile_compatibility_flags_1 << 24 | general_profile_compatibility_flags_2 << 16 | general_profile_compatibility_flags_3 << 8 | general_profile_compatibility_flags_4;
+    let profile_compatibility_rev = 0;
+    for (let i = 0; i < 32; i++) {
+      profile_compatibility_rev = (profile_compatibility_rev | (profile_compatibility_buf >> i & 1) << 31 - i) >>> 0; // reverse bit position (and cast as UInt32)
+    }
+    let profile_compatibility_flags_string = profile_compatibility_rev.toString(16);
+    if (general_profile_idc === 1 && profile_compatibility_flags_string === '2') {
+      profile_compatibility_flags_string = '6';
+    }
+    const tier_flag_string = general_tier_flag ? 'H' : 'L';
+    return {
+      codecString: `hvc1.${profile_space_string}${general_profile_idc}.${profile_compatibility_flags_string}.${tier_flag_string}${general_level_idc}.B0`,
+      params: {
+        general_tier_flag,
+        general_profile_idc,
+        general_profile_space,
+        general_profile_compatibility_flags: [general_profile_compatibility_flags_1, general_profile_compatibility_flags_2, general_profile_compatibility_flags_3, general_profile_compatibility_flags_4],
+        general_constraint_indicator_flags: [general_constraint_indicator_flags_1, general_constraint_indicator_flags_2, general_constraint_indicator_flags_3, general_constraint_indicator_flags_4, general_constraint_indicator_flags_5, general_constraint_indicator_flags_6],
+        general_level_idc,
+        bit_depth: bit_depth_luma_minus8 + 8,
+        bit_depth_luma_minus8,
+        bit_depth_chroma_minus8,
+        min_spatial_segmentation_idc,
+        chroma_format_idc: chroma_format_idc,
+        frame_rate: {
+          fixed: fps_fixed,
+          fps: fps_num / fps_den
+        }
+      },
+      width,
+      height,
+      pixelRatio: [sar_width, sar_height]
+    };
+  }
+  readPPS(pps) {
+    const eg = new ExpGolomb(this.ebsp2rbsp(pps));
+    eg.readUByte();
+    eg.readUByte();
+    eg.skipUEG(); // pic_parameter_set_id
+    eg.skipUEG(); // seq_parameter_set_id
+    eg.skipBits(2); // dependent_slice_segments_enabled_flag, output_flag_present_flag
+    eg.skipBits(3); // num_extra_slice_header_bits
+    eg.skipBits(2); // sign_data_hiding_enabled_flag, cabac_init_present_flag
+    eg.skipUEG();
+    eg.skipUEG();
+    eg.skipEG(); // init_qp_minus26
+    eg.skipBits(2); // constrained_intra_pred_flag, transform_skip_enabled_flag
+    const cu_qp_delta_enabled_flag = eg.readBoolean();
+    if (cu_qp_delta_enabled_flag) {
+      eg.skipUEG();
+    }
+    eg.skipEG(); // cb_qp_offset
+    eg.skipEG(); // cr_qp_offset
+    eg.skipBits(4); // pps_slice_chroma_qp_offsets_present_flag, weighted_pred_flag, weighted_bipred_flag, transquant_bypass_enabled_flag
+    const tiles_enabled_flag = eg.readBoolean();
+    const entropy_coding_sync_enabled_flag = eg.readBoolean();
+    let parallelismType = 1; // slice-based parallel decoding
+    if (entropy_coding_sync_enabled_flag && tiles_enabled_flag) {
+      parallelismType = 0; // mixed-type parallel decoding
+    } else if (entropy_coding_sync_enabled_flag) {
+      parallelismType = 3; // wavefront-based parallel decoding
+    } else if (tiles_enabled_flag) {
+      parallelismType = 2; // tile-based parallel decoding
+    }
+    return {
+      parallelismType
+    };
+  }
+  matchSPS(sps1, sps2) {
+    // compare without headers and VPS related params
+    return String.fromCharCode.apply(null, sps1).substr(3) === String.fromCharCode.apply(null, sps2).substr(3);
+  }
+}
+
+const PACKET_LENGTH = 188;
+class TSDemuxer {
+  constructor(observer, config, typeSupported, logger) {
+    this.logger = void 0;
+    this.observer = void 0;
+    this.config = void 0;
+    this.typeSupported = void 0;
+    this.sampleAes = null;
+    this.pmtParsed = false;
+    this.audioCodec = void 0;
+    this.videoCodec = void 0;
+    this._pmtId = -1;
+    this._videoTrack = void 0;
+    this._audioTrack = void 0;
+    this._id3Track = void 0;
+    this._txtTrack = void 0;
+    this.aacOverFlow = null;
+    this.remainderData = null;
+    this.videoParser = void 0;
+    this.observer = observer;
+    this.config = config;
+    this.typeSupported = typeSupported;
+    this.logger = logger;
+    this.videoParser = null;
+  }
+  static probe(data, logger) {
+    const syncOffset = TSDemuxer.syncOffset(data);
+    if (syncOffset > 0) {
+      logger.warn(`MPEG2-TS detected but first sync word found @ offset ${syncOffset}`);
+    }
+    return syncOffset !== -1;
+  }
+  static syncOffset(data) {
+    const length = data.length;
+    let scanwindow = Math.min(PACKET_LENGTH * 5, length - PACKET_LENGTH) + 1;
+    let i = 0;
+    while (i < scanwindow) {
+      // a TS init segment should contain at least 2 TS packets: PAT and PMT, each starting with 0x47
+      let foundPat = false;
+      let packetStart = -1;
+      let tsPackets = 0;
+      for (let j = i; j < length; j += PACKET_LENGTH) {
+        if (data[j] === 0x47 && (length - j === PACKET_LENGTH || data[j + PACKET_LENGTH] === 0x47)) {
+          tsPackets++;
+          if (packetStart === -1) {
+            packetStart = j;
+            // First sync word found at offset, increase scan length (#5251)
+            if (packetStart !== 0) {
+              scanwindow = Math.min(packetStart + PACKET_LENGTH * 99, data.length - PACKET_LENGTH) + 1;
+            }
+          }
+          if (!foundPat) {
+            foundPat = parsePID(data, j) === 0;
+          }
+          // Sync word found at 0 with 3 packets, or found at offset least 2 packets up to scanwindow (#5501)
+          if (foundPat && tsPackets > 1 && (packetStart === 0 && tsPackets > 2 || j + PACKET_LENGTH > scanwindow)) {
+            return packetStart;
+          }
+        } else if (tsPackets) {
+          // Exit if sync word found, but does not contain contiguous packets
+          return -1;
+        } else {
+          break;
+        }
+      }
+      i++;
+    }
+    return -1;
+  }
+
+  /**
+   * Creates a track model internal to demuxer used to drive remuxing input
+   */
+  static createTrack(type, duration) {
+    return {
+      container: type === 'video' || type === 'audio' ? 'video/mp2t' : undefined,
+      type,
+      id: RemuxerTrackIdConfig[type],
+      pid: -1,
+      inputTimeScale: 90000,
+      sequenceNumber: 0,
+      samples: [],
+      dropped: 0,
+      duration: type === 'audio' ? duration : undefined
+    };
+  }
+
+  /**
+   * Initializes a new init segment on the demuxer/remuxer interface. Needed for discontinuities/track-switches (or at stream start)
+   * Resets all internal track instances of the demuxer.
+   */
+  resetInitSegment(initSegment, audioCodec, videoCodec, trackDuration) {
+    this.pmtParsed = false;
+    this._pmtId = -1;
+    this._videoTrack = TSDemuxer.createTrack('video');
+    this._videoTrack.duration = trackDuration;
+    this._audioTrack = TSDemuxer.createTrack('audio', trackDuration);
+    this._id3Track = TSDemuxer.createTrack('id3');
+    this._txtTrack = TSDemuxer.createTrack('text');
+    this._audioTrack.segmentCodec = 'aac';
+
+    // flush any partial content
+    this.videoParser = null;
+    this.aacOverFlow = null;
+    this.remainderData = null;
+    this.audioCodec = audioCodec;
+    this.videoCodec = videoCodec;
+  }
+  resetTimeStamp() {}
+  resetContiguity() {
+    const {
+      _audioTrack,
+      _videoTrack,
+      _id3Track
+    } = this;
+    if (_audioTrack) {
+      _audioTrack.pesData = null;
+    }
+    if (_videoTrack) {
+      _videoTrack.pesData = null;
+    }
+    if (_id3Track) {
+      _id3Track.pesData = null;
+    }
+    this.aacOverFlow = null;
+    this.remainderData = null;
+  }
+  demux(data, timeOffset, isSampleAes = false, flush = false) {
+    if (!isSampleAes) {
+      this.sampleAes = null;
+    }
+    let pes;
+    const videoTrack = this._videoTrack;
+    const audioTrack = this._audioTrack;
+    const id3Track = this._id3Track;
+    const textTrack = this._txtTrack;
+    let videoPid = videoTrack.pid;
+    let videoData = videoTrack.pesData;
+    let audioPid = audioTrack.pid;
+    let id3Pid = id3Track.pid;
+    let audioData = audioTrack.pesData;
+    let id3Data = id3Track.pesData;
+    let unknownPID = null;
+    let pmtParsed = this.pmtParsed;
+    let pmtId = this._pmtId;
+    let len = data.length;
+    if (this.remainderData) {
+      data = appendUint8Array(this.remainderData, data);
+      len = data.length;
+      this.remainderData = null;
+    }
+    if (len < PACKET_LENGTH && !flush) {
+      this.remainderData = data;
+      return {
+        audioTrack,
+        videoTrack,
+        id3Track,
+        textTrack
+      };
+    }
+    const syncOffset = Math.max(0, TSDemuxer.syncOffset(data));
+    len -= (len - syncOffset) % PACKET_LENGTH;
+    if (len < data.byteLength && !flush) {
+      this.remainderData = new Uint8Array(data.buffer, len, data.buffer.byteLength - len);
+    }
+
+    // loop through TS packets
+    let tsPacketErrors = 0;
+    for (let start = syncOffset; start < len; start += PACKET_LENGTH) {
+      if (data[start] === 0x47) {
+        const stt = !!(data[start + 1] & 0x40);
+        const pid = parsePID(data, start);
+        const atf = (data[start + 3] & 0x30) >> 4;
+
+        // if an adaption field is present, its length is specified by the fifth byte of the TS packet header.
+        let offset;
+        if (atf > 1) {
+          offset = start + 5 + data[start + 4];
+          // continue if there is only adaptation field
+          if (offset === start + PACKET_LENGTH) {
+            continue;
+          }
+        } else {
+          offset = start + 4;
+        }
+        switch (pid) {
+          case videoPid:
+            if (stt) {
+              if (videoData && (pes = parsePES(videoData, this.logger))) {
+                this.readyVideoParser(videoTrack.segmentCodec);
+                if (this.videoParser !== null) {
+                  this.videoParser.parsePES(videoTrack, textTrack, pes, false);
+                }
+              }
+              videoData = {
+                data: [],
+                size: 0
+              };
+            }
+            if (videoData) {
+              videoData.data.push(data.subarray(offset, start + PACKET_LENGTH));
+              videoData.size += start + PACKET_LENGTH - offset;
+            }
+            break;
+          case audioPid:
+            if (stt) {
+              if (audioData && (pes = parsePES(audioData, this.logger))) {
+                switch (audioTrack.segmentCodec) {
+                  case 'aac':
+                    this.parseAACPES(audioTrack, pes);
+                    break;
+                  case 'mp3':
+                    this.parseMPEGPES(audioTrack, pes);
+                    break;
+                  case 'ac3':
+                    {
+                      this.parseAC3PES(audioTrack, pes);
+                    }
+                    break;
+                }
+              }
+              audioData = {
+                data: [],
+                size: 0
+              };
+            }
+            if (audioData) {
+              audioData.data.push(data.subarray(offset, start + PACKET_LENGTH));
+              audioData.size += start + PACKET_LENGTH - offset;
+            }
+            break;
+          case id3Pid:
+            if (stt) {
+              if (id3Data && (pes = parsePES(id3Data, this.logger))) {
+                this.parseID3PES(id3Track, pes);
+              }
+              id3Data = {
+                data: [],
+                size: 0
+              };
+            }
+            if (id3Data) {
+              id3Data.data.push(data.subarray(offset, start + PACKET_LENGTH));
+              id3Data.size += start + PACKET_LENGTH - offset;
+            }
+            break;
+          case 0:
+            if (stt) {
+              offset += data[offset] + 1;
+            }
+            pmtId = this._pmtId = parsePAT(data, offset);
+            // this.logger.log('PMT PID:'  + this._pmtId);
+            break;
+          case pmtId:
+            {
+              if (stt) {
+                offset += data[offset] + 1;
+              }
+              const parsedPIDs = parsePMT(data, offset, this.typeSupported, isSampleAes, this.observer, this.logger);
+
+              // only update track id if track PID found while parsing PMT
+              // this is to avoid resetting the PID to -1 in case
+              // track PID transiently disappears from the stream
+              // this could happen in case of transient missing audio samples for example
+              // NOTE this is only the PID of the track as found in TS,
+              // but we are not using this for MP4 track IDs.
+              videoPid = parsedPIDs.videoPid;
+              if (videoPid > 0) {
+                videoTrack.pid = videoPid;
+                videoTrack.segmentCodec = parsedPIDs.segmentVideoCodec;
+              }
+              audioPid = parsedPIDs.audioPid;
+              if (audioPid > 0) {
+                audioTrack.pid = audioPid;
+                audioTrack.segmentCodec = parsedPIDs.segmentAudioCodec;
+              }
+              id3Pid = parsedPIDs.id3Pid;
+              if (id3Pid > 0) {
+                id3Track.pid = id3Pid;
+              }
+              if (unknownPID !== null && !pmtParsed) {
+                this.logger.warn(`MPEG-TS PMT found at ${start} after unknown PID '${unknownPID}'. Backtracking to sync byte @${syncOffset} to parse all TS packets.`);
+                unknownPID = null;
+                // we set it to -188, the += 188 in the for loop will reset start to 0
+                start = syncOffset - 188;
+              }
+              pmtParsed = this.pmtParsed = true;
+              break;
+            }
+          case 0x11:
+          case 0x1fff:
+            break;
+          default:
+            unknownPID = pid;
+            break;
+        }
+      } else {
+        tsPacketErrors++;
+      }
+    }
+    if (tsPacketErrors > 0) {
+      emitParsingError(this.observer, new Error(`Found ${tsPacketErrors} TS packet/s that do not start with 0x47`), undefined, this.logger);
+    }
+    videoTrack.pesData = videoData;
+    audioTrack.pesData = audioData;
+    id3Track.pesData = id3Data;
+    const demuxResult = {
+      audioTrack,
+      videoTrack,
+      id3Track,
+      textTrack
+    };
+    if (flush) {
+      this.extractRemainingSamples(demuxResult);
+    }
+    return demuxResult;
+  }
+  flush() {
+    const {
+      remainderData
+    } = this;
+    this.remainderData = null;
+    let result;
+    if (remainderData) {
+      result = this.demux(remainderData, -1, false, true);
+    } else {
+      result = {
+        videoTrack: this._videoTrack,
+        audioTrack: this._audioTrack,
+        id3Track: this._id3Track,
+        textTrack: this._txtTrack
+      };
+    }
+    this.extractRemainingSamples(result);
+    if (this.sampleAes) {
+      return this.decrypt(result, this.sampleAes);
+    }
+    return result;
+  }
+  extractRemainingSamples(demuxResult) {
+    const {
+      audioTrack,
+      videoTrack,
+      id3Track,
+      textTrack
+    } = demuxResult;
+    const videoData = videoTrack.pesData;
+    const audioData = audioTrack.pesData;
+    const id3Data = id3Track.pesData;
+    // try to parse last PES packets
+    let pes;
+    if (videoData && (pes = parsePES(videoData, this.logger))) {
+      this.readyVideoParser(videoTrack.segmentCodec);
+      if (this.videoParser !== null) {
+        this.videoParser.parsePES(videoTrack, textTrack, pes, true);
+        videoTrack.pesData = null;
+      }
+    } else {
+      // either avcData null or PES truncated, keep it for next frag parsing
+      videoTrack.pesData = videoData;
+    }
+    if (audioData && (pes = parsePES(audioData, this.logger))) {
+      switch (audioTrack.segmentCodec) {
+        case 'aac':
+          this.parseAACPES(audioTrack, pes);
+          break;
+        case 'mp3':
+          this.parseMPEGPES(audioTrack, pes);
+          break;
+        case 'ac3':
+          {
+            this.parseAC3PES(audioTrack, pes);
+          }
+          break;
+      }
+      audioTrack.pesData = null;
+    } else {
+      if (audioData != null && audioData.size) {
+        this.logger.log('last AAC PES packet truncated,might overlap between fragments');
+      }
+
+      // either audioData null or PES truncated, keep it for next frag parsing
+      audioTrack.pesData = audioData;
+    }
+    if (id3Data && (pes = parsePES(id3Data, this.logger))) {
+      this.parseID3PES(id3Track, pes);
+      id3Track.pesData = null;
+    } else {
+      // either id3Data null or PES truncated, keep it for next frag parsing
+      id3Track.pesData = id3Data;
+    }
+  }
+  demuxSampleAes(data, keyData, timeOffset) {
+    const demuxResult = this.demux(data, timeOffset, true, !this.config.progressive);
+    const sampleAes = this.sampleAes = new SampleAesDecrypter(this.observer, this.config, keyData);
+    return this.decrypt(demuxResult, sampleAes);
+  }
+  readyVideoParser(codec) {
+    if (this.videoParser === null) {
+      if (codec === 'avc') {
+        this.videoParser = new AvcVideoParser();
+      } else if (codec === 'hevc') {
+        this.videoParser = new HevcVideoParser();
+      }
+    }
+  }
+  decrypt(demuxResult, sampleAes) {
+    return new Promise(resolve => {
+      const {
+        audioTrack,
+        videoTrack
+      } = demuxResult;
+      if (audioTrack.samples && audioTrack.segmentCodec === 'aac') {
+        sampleAes.decryptAacSamples(audioTrack.samples, 0, () => {
+          if (videoTrack.samples) {
+            sampleAes.decryptAvcSamples(videoTrack.samples, 0, 0, () => {
+              resolve(demuxResult);
+            });
+          } else {
+            resolve(demuxResult);
+          }
+        });
+      } else if (videoTrack.samples) {
+        sampleAes.decryptAvcSamples(videoTrack.samples, 0, 0, () => {
+          resolve(demuxResult);
+        });
+      }
+    });
+  }
+  destroy() {
+    if (this.observer) {
+      this.observer.removeAllListeners();
+    }
+    // @ts-ignore
+    this.config = this.logger = this.observer = null;
+    this.aacOverFlow = this.videoParser = this.remainderData = this.sampleAes = null;
+    this._videoTrack = this._audioTrack = this._id3Track = this._txtTrack = undefined;
+  }
+  parseAACPES(track, pes) {
+    let startOffset = 0;
+    const aacOverFlow = this.aacOverFlow;
+    let data = pes.data;
+    if (aacOverFlow) {
+      this.aacOverFlow = null;
+      const frameMissingBytes = aacOverFlow.missing;
+      const sampleLength = aacOverFlow.sample.unit.byteLength;
+      // logger.log(`AAC: append overflowing ${sampleLength} bytes to beginning of new PES`);
+      if (frameMissingBytes === -1) {
+        data = appendUint8Array(aacOverFlow.sample.unit, data);
+      } else {
+        const frameOverflowBytes = sampleLength - frameMissingBytes;
+        aacOverFlow.sample.unit.set(data.subarray(0, frameMissingBytes), frameOverflowBytes);
+        track.samples.push(aacOverFlow.sample);
+        startOffset = aacOverFlow.missing;
+      }
+    }
+    // look for ADTS header (0xFFFx)
+    let offset;
+    let len;
+    for (offset = startOffset, len = data.length; offset < len - 1; offset++) {
+      if (isHeader$1(data, offset)) {
+        break;
+      }
+    }
+    // if ADTS header does not start straight from the beginning of the PES payload, raise an error
+    if (offset !== startOffset) {
+      let reason;
+      const recoverable = offset < len - 1;
+      if (recoverable) {
+        reason = `AAC PES did not start with ADTS header,offset:${offset}`;
+      } else {
+        reason = 'No ADTS header found in AAC PES';
+      }
+      emitParsingError(this.observer, new Error(reason), recoverable, this.logger);
+      if (!recoverable) {
+        return;
+      }
+    }
+    initTrackConfig(track, this.observer, data, offset, this.audioCodec);
+    let pts;
+    if (pes.pts !== undefined) {
+      pts = pes.pts;
+    } else if (aacOverFlow) {
+      // if last AAC frame is overflowing, we should ensure timestamps are contiguous:
+      // first sample PTS should be equal to last sample PTS + frameDuration
+      const frameDuration = getFrameDuration(track.samplerate);
+      pts = aacOverFlow.sample.pts + frameDuration;
+    } else {
+      this.logger.warn('[tsdemuxer]: AAC PES unknown PTS');
+      return;
+    }
+
+    // scan for aac samples
+    let frameIndex = 0;
+    let frame;
+    while (offset < len) {
+      frame = appendFrame$2(track, data, offset, pts, frameIndex);
+      offset += frame.length;
+      if (!frame.missing) {
+        frameIndex++;
+        for (; offset < len - 1; offset++) {
+          if (isHeader$1(data, offset)) {
+            break;
+          }
+        }
+      } else {
+        this.aacOverFlow = frame;
+        break;
+      }
+    }
+  }
+  parseMPEGPES(track, pes) {
+    const data = pes.data;
+    const length = data.length;
+    let frameIndex = 0;
+    let offset = 0;
+    const pts = pes.pts;
+    if (pts === undefined) {
+      this.logger.warn('[tsdemuxer]: MPEG PES unknown PTS');
+      return;
+    }
+    while (offset < length) {
+      if (isHeader(data, offset)) {
+        const frame = appendFrame$1(track, data, offset, pts, frameIndex);
+        if (frame) {
+          offset += frame.length;
+          frameIndex++;
+        } else {
+          // logger.log('Unable to parse Mpeg audio frame');
+          break;
+        }
+      } else {
+        // nothing found, keep looking
+        offset++;
+      }
+    }
+  }
+  parseAC3PES(track, pes) {
+    {
+      const data = pes.data;
+      const pts = pes.pts;
+      if (pts === undefined) {
+        this.logger.warn('[tsdemuxer]: AC3 PES unknown PTS');
+        return;
+      }
+      const length = data.length;
+      let frameIndex = 0;
+      let offset = 0;
+      let parsed;
+      while (offset < length && (parsed = appendFrame(track, data, offset, pts, frameIndex++)) > 0) {
+        offset += parsed;
+      }
+    }
+  }
+  parseID3PES(id3Track, pes) {
+    if (pes.pts === undefined) {
+      this.logger.warn('[tsdemuxer]: ID3 PES unknown PTS');
+      return;
+    }
+    const id3Sample = _extends({}, pes, {
+      type: this._videoTrack ? MetadataSchema.emsg : MetadataSchema.audioId3,
+      duration: Number.POSITIVE_INFINITY
+    });
+    id3Track.samples.push(id3Sample);
+  }
+}
+function parsePID(data, offset) {
+  // pid is a 13-bit field starting at the last bit of TS[1]
+  return ((data[offset + 1] & 0x1f) << 8) + data[offset + 2];
+}
+function parsePAT(data, offset) {
+  // skip the PSI header and parse the first PMT entry
+  return (data[offset + 10] & 0x1f) << 8 | data[offset + 11];
+}
+function parsePMT(data, offset, typeSupported, isSampleAes, observer, logger) {
+  const result = {
+    audioPid: -1,
+    videoPid: -1,
+    id3Pid: -1,
+    segmentVideoCodec: 'avc',
+    segmentAudioCodec: 'aac'
+  };
+  const sectionLength = (data[offset + 1] & 0x0f) << 8 | data[offset + 2];
+  const tableEnd = offset + 3 + sectionLength - 4;
+  // to determine where the table is, we have to figure out how
+  // long the program info descriptors are
+  const programInfoLength = (data[offset + 10] & 0x0f) << 8 | data[offset + 11];
+  // advance the offset to the first entry in the mapping table
+  offset += 12 + programInfoLength;
+  while (offset < tableEnd) {
+    const pid = parsePID(data, offset);
+    const esInfoLength = (data[offset + 3] & 0x0f) << 8 | data[offset + 4];
+    switch (data[offset]) {
+      case 0xcf:
+        // SAMPLE-AES AAC
+        if (!isSampleAes) {
+          logEncryptedSamplesFoundInUnencryptedStream('ADTS AAC', logger);
+          break;
+        }
+      /* falls through */
+      case 0x0f:
+        // ISO/IEC 13818-7 ADTS AAC (MPEG-2 lower bit-rate audio)
+        // logger.log('AAC PID:'  + pid);
+        if (result.audioPid === -1) {
+          result.audioPid = pid;
+        }
+        break;
+
+      // Packetized metadata (ID3)
+      case 0x15:
+        // logger.log('ID3 PID:'  + pid);
+        if (result.id3Pid === -1) {
+          result.id3Pid = pid;
+        }
+        break;
+      case 0xdb:
+        // SAMPLE-AES AVC
+        if (!isSampleAes) {
+          logEncryptedSamplesFoundInUnencryptedStream('H.264', logger);
+          break;
+        }
+      /* falls through */
+      case 0x1b:
+        // ITU-T Rec. H.264 and ISO/IEC 14496-10 (lower bit-rate video)
+        // logger.log('AVC PID:'  + pid);
+        if (result.videoPid === -1) {
+          result.videoPid = pid;
+        }
+        break;
+
+      // ISO/IEC 11172-3 (MPEG-1 audio)
+      // or ISO/IEC 13818-3 (MPEG-2 halved sample rate audio)
+      case 0x03:
+      case 0x04:
+        // logger.log('MPEG PID:'  + pid);
+        if (!typeSupported.mpeg && !typeSupported.mp3) {
+          logger.log('MPEG audio found, not supported in this browser');
+        } else if (result.audioPid === -1) {
+          result.audioPid = pid;
+          result.segmentAudioCodec = 'mp3';
+        }
+        break;
+      case 0xc1:
+        // SAMPLE-AES AC3
+        if (!isSampleAes) {
+          logEncryptedSamplesFoundInUnencryptedStream('AC-3', logger);
+          break;
+        }
+      /* falls through */
+      case 0x81:
+        {
+          if (!typeSupported.ac3) {
+            logger.log('AC-3 audio found, not supported in this browser');
+          } else if (result.audioPid === -1) {
+            result.audioPid = pid;
+            result.segmentAudioCodec = 'ac3';
+          }
+        }
+        break;
+      case 0x06:
+        // stream_type 6 can mean a lot of different things in case of DVB.
+        // We need to look at the descriptors. Right now, we're only interested
+        // in AC-3 audio, so we do the descriptor parsing only when we don't have
+        // an audio PID yet.
+        if (result.audioPid === -1 && esInfoLength > 0) {
+          let parsePos = offset + 5;
+          let remaining = esInfoLength;
+          while (remaining > 2) {
+            const descriptorId = data[parsePos];
+            switch (descriptorId) {
+              case 0x6a:
+                // DVB Descriptor for AC-3
+                {
+                  if (typeSupported.ac3 !== true) {
+                    logger.log('AC-3 audio found, not supported in this browser for now');
+                  } else {
+                    result.audioPid = pid;
+                    result.segmentAudioCodec = 'ac3';
+                  }
+                }
+                break;
+            }
+            const descriptorLen = data[parsePos + 1] + 2;
+            parsePos += descriptorLen;
+            remaining -= descriptorLen;
+          }
+        }
+        break;
+      case 0xc2: // SAMPLE-AES EC3
+      /* falls through */
+      case 0x87:
+        emitParsingError(observer, new Error('Unsupported EC-3 in M2TS found'), undefined, logger);
+        return result;
+      case 0x24:
+        // ITU-T Rec. H.265 and ISO/IEC 23008-2 (HEVC)
+        {
+          if (result.videoPid === -1) {
+            result.videoPid = pid;
+            result.segmentVideoCodec = 'hevc';
+            logger.log('HEVC in M2TS found');
+          }
+        }
+        break;
+    }
+    // move to the next table entry
+    // skip past the elementary stream descriptors, if present
+    offset += esInfoLength + 5;
+  }
+  return result;
+}
+function emitParsingError(observer, error, levelRetry, logger) {
+  logger.warn(`parsing error: ${error.message}`);
+  observer.emit(Events.ERROR, Events.ERROR, {
+    type: ErrorTypes.MEDIA_ERROR,
+    details: ErrorDetails.FRAG_PARSING_ERROR,
+    fatal: false,
+    levelRetry,
+    error,
+    reason: error.message
+  });
+}
+function logEncryptedSamplesFoundInUnencryptedStream(type, logger) {
+  logger.log(`${type} with AES-128-CBC encryption found in unencrypted stream`);
+}
+function parsePES(stream, logger) {
+  let i = 0;
+  let frag;
+  let pesLen;
+  let pesHdrLen;
+  let pesPts;
+  let pesDts;
+  const data = stream.data;
+  // safety check
+  if (!stream || stream.size === 0) {
+    return null;
+  }
+
+  // we might need up to 19 bytes to read PES header
+  // if first chunk of data is less than 19 bytes, let's merge it with following ones until we get 19 bytes
+  // usually only one merge is needed (and this is rare ...)
+  while (data[0].length < 19 && data.length > 1) {
+    data[0] = appendUint8Array(data[0], data[1]);
+    data.splice(1, 1);
+  }
+  // retrieve PTS/DTS from first fragment
+  frag = data[0];
+  const pesPrefix = (frag[0] << 16) + (frag[1] << 8) + frag[2];
+  if (pesPrefix === 1) {
+    pesLen = (frag[4] << 8) + frag[5];
+    // if PES parsed length is not zero and greater than total received length, stop parsing. PES might be truncated
+    // minus 6 : PES header size
+    if (pesLen && pesLen > stream.size - 6) {
+      return null;
+    }
+    const pesFlags = frag[7];
+    if (pesFlags & 0xc0) {
+      /* PES header described here : http://dvd.sourceforge.net/dvdinfo/pes-hdr.html
+          as PTS / DTS is 33 bit we cannot use bitwise operator in JS,
+          as Bitwise operators treat their operands as a sequence of 32 bits */
+      pesPts = (frag[9] & 0x0e) * 536870912 +
+      // 1 << 29
+      (frag[10] & 0xff) * 4194304 +
+      // 1 << 22
+      (frag[11] & 0xfe) * 16384 +
+      // 1 << 14
+      (frag[12] & 0xff) * 128 +
+      // 1 << 7
+      (frag[13] & 0xfe) / 2;
+      if (pesFlags & 0x40) {
+        pesDts = (frag[14] & 0x0e) * 536870912 +
+        // 1 << 29
+        (frag[15] & 0xff) * 4194304 +
+        // 1 << 22
+        (frag[16] & 0xfe) * 16384 +
+        // 1 << 14
+        (frag[17] & 0xff) * 128 +
+        // 1 << 7
+        (frag[18] & 0xfe) / 2;
+        if (pesPts - pesDts > 60 * 90000) {
+          logger.warn(`${Math.round((pesPts - pesDts) / 90000)}s delta between PTS and DTS, align them`);
+          pesPts = pesDts;
+        }
+      } else {
+        pesDts = pesPts;
+      }
+    }
+    pesHdrLen = frag[8];
+    // 9 bytes : 6 bytes for PES header + 3 bytes for PES extension
+    let payloadStartOffset = pesHdrLen + 9;
+    if (stream.size <= payloadStartOffset) {
+      return null;
+    }
+    stream.size -= payloadStartOffset;
+    // reassemble PES packet
+    const pesData = new Uint8Array(stream.size);
+    for (let j = 0, dataLen = data.length; j < dataLen; j++) {
+      frag = data[j];
+      let len = frag.byteLength;
+      if (payloadStartOffset) {
+        if (payloadStartOffset > len) {
+          // trim full frag if PES header bigger than frag
+          payloadStartOffset -= len;
+          continue;
+        } else {
+          // trim partial frag if PES header smaller than frag
+          frag = frag.subarray(payloadStartOffset);
+          len -= payloadStartOffset;
+          payloadStartOffset = 0;
+        }
+      }
+      pesData.set(frag, i);
+      i += len;
+    }
+    if (pesLen) {
+      // payload size : remove PES header + PES extension
+      pesLen -= pesHdrLen + 3;
+    }
+    return {
+      data: pesData,
+      pts: pesPts,
+      dts: pesDts,
+      len: pesLen
+    };
+  }
+  return null;
+}
+
+/**
+ *  AAC helper
+ */
+
+class AAC {
+  static getSilentFrame(codec, channelCount) {
+    switch (codec) {
+      case 'mp4a.40.2':
+        if (channelCount === 1) {
+          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x23, 0x80]);
+        } else if (channelCount === 2) {
+          return new Uint8Array([0x21, 0x00, 0x49, 0x90, 0x02, 0x19, 0x00, 0x23, 0x80]);
+        } else if (channelCount === 3) {
+          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x8e]);
+        } else if (channelCount === 4) {
+          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x80, 0x2c, 0x80, 0x08, 0x02, 0x38]);
+        } else if (channelCount === 5) {
+          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x82, 0x30, 0x04, 0x99, 0x00, 0x21, 0x90, 0x02, 0x38]);
+        } else if (channelCount === 6) {
+          return new Uint8Array([0x00, 0xc8, 0x00, 0x80, 0x20, 0x84, 0x01, 0x26, 0x40, 0x08, 0x64, 0x00, 0x82, 0x30, 0x04, 0x99, 0x00, 0x21, 0x90, 0x02, 0x00, 0xb2, 0x00, 0x20, 0x08, 0xe0]);
+        }
+        break;
+      // handle HE-AAC below (mp4a.40.5 / mp4a.40.29)
+      default:
+        if (channelCount === 1) {
+          // ffmpeg -y -f lavfi -i "aevalsrc=0:d=0.05" -c:a libfdk_aac -profile:a aac_he -b:a 4k output.aac && hexdump -v -e '16/1 "0x%x," "\n"' -v output.aac
+          return new Uint8Array([0x1, 0x40, 0x22, 0x80, 0xa3, 0x4e, 0xe6, 0x80, 0xba, 0x8, 0x0, 0x0, 0x0, 0x1c, 0x6, 0xf1, 0xc1, 0xa, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5e]);
+        } else if (channelCount === 2) {
+          // ffmpeg -y -f lavfi -i "aevalsrc=0|0:d=0.05" -c:a libfdk_aac -profile:a aac_he_v2 -b:a 4k output.aac && hexdump -v -e '16/1 "0x%x," "\n"' -v output.aac
+          return new Uint8Array([0x1, 0x40, 0x22, 0x80, 0xa3, 0x5e, 0xe6, 0x80, 0xba, 0x8, 0x0, 0x0, 0x0, 0x0, 0x95, 0x0, 0x6, 0xf1, 0xa1, 0xa, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5e]);
+        } else if (channelCount === 3) {
+          // ffmpeg -y -f lavfi -i "aevalsrc=0|0|0:d=0.05" -c:a libfdk_aac -profile:a aac_he_v2 -b:a 4k output.aac && hexdump -v -e '16/1 "0x%x," "\n"' -v output.aac
+          return new Uint8Array([0x1, 0x40, 0x22, 0x80, 0xa3, 0x5e, 0xe6, 0x80, 0xba, 0x8, 0x0, 0x0, 0x0, 0x0, 0x95, 0x0, 0x6, 0xf1, 0xa1, 0xa, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5e]);
+        }
+        break;
+    }
+    return undefined;
+  }
+}
+
+/**
+ * Generate MP4 Box
+ */
+
+const UINT32_MAX = Math.pow(2, 32) - 1;
+class MP4 {
+  static init() {
+    MP4.types = {
+      avc1: [],
+      // codingname
+      avcC: [],
+      hvc1: [],
+      hvcC: [],
+      btrt: [],
+      dinf: [],
+      dref: [],
+      esds: [],
+      ftyp: [],
+      hdlr: [],
+      mdat: [],
+      mdhd: [],
+      mdia: [],
+      mfhd: [],
+      minf: [],
+      moof: [],
+      moov: [],
+      mp4a: [],
+      '.mp3': [],
+      dac3: [],
+      'ac-3': [],
+      mvex: [],
+      mvhd: [],
+      pasp: [],
+      sdtp: [],
+      stbl: [],
+      stco: [],
+      stsc: [],
+      stsd: [],
+      stsz: [],
+      stts: [],
+      tfdt: [],
+      tfhd: [],
+      traf: [],
+      trak: [],
+      trun: [],
+      trex: [],
+      tkhd: [],
+      vmhd: [],
+      smhd: []
+    };
+    let i;
+    for (i in MP4.types) {
+      if (MP4.types.hasOwnProperty(i)) {
+        MP4.types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];
+      }
+    }
+    const videoHdlr = new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x00,
+    // pre_defined
+    0x76, 0x69, 0x64, 0x65,
+    // handler_type: 'vide'
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'
+    ]);
+    const audioHdlr = new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x00,
+    // pre_defined
+    0x73, 0x6f, 0x75, 0x6e,
+    // handler_type: 'soun'
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'
+    ]);
+    MP4.HDLR_TYPES = {
+      video: videoHdlr,
+      audio: audioHdlr
+    };
+    const dref = new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x01,
+    // entry_count
+    0x00, 0x00, 0x00, 0x0c,
+    // entry_size
+    0x75, 0x72, 0x6c, 0x20,
+    // 'url' type
+    0x00,
+    // version 0
+    0x00, 0x00, 0x01 // entry_flags
+    ]);
+    const stco = new Uint8Array([0x00,
+    // version
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x00 // entry_count
+    ]);
+    MP4.STTS = MP4.STSC = MP4.STCO = stco;
+    MP4.STSZ = new Uint8Array([0x00,
+    // version
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x00,
+    // sample_size
+    0x00, 0x00, 0x00, 0x00 // sample_count
+    ]);
+    MP4.VMHD = new Uint8Array([0x00,
+    // version
+    0x00, 0x00, 0x01,
+    // flags
+    0x00, 0x00,
+    // graphicsmode
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor
+    ]);
+    MP4.SMHD = new Uint8Array([0x00,
+    // version
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00,
+    // balance
+    0x00, 0x00 // reserved
+    ]);
+    MP4.STSD = new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x01]); // entry_count
+
+    const majorBrand = new Uint8Array([105, 115, 111, 109]); // isom
+    const avc1Brand = new Uint8Array([97, 118, 99, 49]); // avc1
+    const minorVersion = new Uint8Array([0, 0, 0, 1]);
+    MP4.FTYP = MP4.box(MP4.types.ftyp, majorBrand, minorVersion, majorBrand, avc1Brand);
+    MP4.DINF = MP4.box(MP4.types.dinf, MP4.box(MP4.types.dref, dref));
+  }
+  static box(type, ...payload) {
+    let size = 8;
+    let i = payload.length;
+    const len = i;
+    // calculate the total size we need to allocate
+    while (i--) {
+      size += payload[i].byteLength;
+    }
+    const result = new Uint8Array(size);
+    result[0] = size >> 24 & 0xff;
+    result[1] = size >> 16 & 0xff;
+    result[2] = size >> 8 & 0xff;
+    result[3] = size & 0xff;
+    result.set(type, 4);
+    // copy the payload into the result
+    for (i = 0, size = 8; i < len; i++) {
+      // copy payload[i] array @ offset size
+      result.set(payload[i], size);
+      size += payload[i].byteLength;
+    }
+    return result;
+  }
+  static hdlr(type) {
+    return MP4.box(MP4.types.hdlr, MP4.HDLR_TYPES[type]);
+  }
+  static mdat(data) {
+    return MP4.box(MP4.types.mdat, data);
+  }
+  static mdhd(timescale, duration) {
+    duration *= timescale;
+    const upperWordDuration = Math.floor(duration / (UINT32_MAX + 1));
+    const lowerWordDuration = Math.floor(duration % (UINT32_MAX + 1));
+    return MP4.box(MP4.types.mdhd, new Uint8Array([0x01,
+    // version 1
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
+    // creation_time
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
+    // modification_time
+    timescale >> 24 & 0xff, timescale >> 16 & 0xff, timescale >> 8 & 0xff, timescale & 0xff,
+    // timescale
+    upperWordDuration >> 24, upperWordDuration >> 16 & 0xff, upperWordDuration >> 8 & 0xff, upperWordDuration & 0xff, lowerWordDuration >> 24, lowerWordDuration >> 16 & 0xff, lowerWordDuration >> 8 & 0xff, lowerWordDuration & 0xff, 0x55, 0xc4,
+    // 'und' language (undetermined)
+    0x00, 0x00]));
+  }
+  static mdia(track) {
+    return MP4.box(MP4.types.mdia, MP4.mdhd(track.timescale || 0, track.duration || 0), MP4.hdlr(track.type), MP4.minf(track));
+  }
+  static mfhd(sequenceNumber) {
+    return MP4.box(MP4.types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00,
+    // flags
+    sequenceNumber >> 24, sequenceNumber >> 16 & 0xff, sequenceNumber >> 8 & 0xff, sequenceNumber & 0xff // sequence_number
+    ]));
+  }
+  static minf(track) {
+    if (track.type === 'audio') {
+      return MP4.box(MP4.types.minf, MP4.box(MP4.types.smhd, MP4.SMHD), MP4.DINF, MP4.stbl(track));
+    } else {
+      return MP4.box(MP4.types.minf, MP4.box(MP4.types.vmhd, MP4.VMHD), MP4.DINF, MP4.stbl(track));
+    }
+  }
+  static moof(sn, baseMediaDecodeTime, track) {
+    return MP4.box(MP4.types.moof, MP4.mfhd(sn), MP4.traf(track, baseMediaDecodeTime));
+  }
+  static moov(tracks) {
+    let i = tracks.length;
+    const boxes = [];
+    while (i--) {
+      boxes[i] = MP4.trak(tracks[i]);
+    }
+    return MP4.box.apply(null, [MP4.types.moov, MP4.mvhd(tracks[0].timescale || 0, tracks[0].duration || 0)].concat(boxes).concat(MP4.mvex(tracks)));
+  }
+  static mvex(tracks) {
+    let i = tracks.length;
+    const boxes = [];
+    while (i--) {
+      boxes[i] = MP4.trex(tracks[i]);
+    }
+    return MP4.box.apply(null, [MP4.types.mvex, ...boxes]);
+  }
+  static mvhd(timescale, duration) {
+    duration *= timescale;
+    const upperWordDuration = Math.floor(duration / (UINT32_MAX + 1));
+    const lowerWordDuration = Math.floor(duration % (UINT32_MAX + 1));
+    const bytes = new Uint8Array([0x01,
+    // version 1
+    0x00, 0x00, 0x00,
+    // flags
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
+    // creation_time
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
+    // modification_time
+    timescale >> 24 & 0xff, timescale >> 16 & 0xff, timescale >> 8 & 0xff, timescale & 0xff,
+    // timescale
+    upperWordDuration >> 24, upperWordDuration >> 16 & 0xff, upperWordDuration >> 8 & 0xff, upperWordDuration & 0xff, lowerWordDuration >> 24, lowerWordDuration >> 16 & 0xff, lowerWordDuration >> 8 & 0xff, lowerWordDuration & 0xff, 0x00, 0x01, 0x00, 0x00,
+    // 1.0 rate
+    0x01, 0x00,
+    // 1.0 volume
+    0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
+    // transformation: unity matrix
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // pre_defined
+    0xff, 0xff, 0xff, 0xff // next_track_ID
+    ]);
+    return MP4.box(MP4.types.mvhd, bytes);
+  }
+  static sdtp(track) {
+    const samples = track.samples || [];
+    const bytes = new Uint8Array(4 + samples.length);
+    let i;
+    let flags;
+    // leave the full box header (4 bytes) all zero
+    // write the sample table
+    for (i = 0; i < samples.length; i++) {
+      flags = samples[i].flags;
+      bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;
+    }
+    return MP4.box(MP4.types.sdtp, bytes);
+  }
+  static stbl(track) {
+    return MP4.box(MP4.types.stbl, MP4.stsd(track), MP4.box(MP4.types.stts, MP4.STTS), MP4.box(MP4.types.stsc, MP4.STSC), MP4.box(MP4.types.stsz, MP4.STSZ), MP4.box(MP4.types.stco, MP4.STCO));
+  }
+  static avc1(track) {
+    let sps = [];
+    let pps = [];
+    let i;
+    let data;
+    let len;
+    // assemble the SPSs
+
+    for (i = 0; i < track.sps.length; i++) {
+      data = track.sps[i];
+      len = data.byteLength;
+      sps.push(len >>> 8 & 0xff);
+      sps.push(len & 0xff);
+
+      // SPS
+      sps = sps.concat(Array.prototype.slice.call(data));
+    }
+
+    // assemble the PPSs
+    for (i = 0; i < track.pps.length; i++) {
+      data = track.pps[i];
+      len = data.byteLength;
+      pps.push(len >>> 8 & 0xff);
+      pps.push(len & 0xff);
+      pps = pps.concat(Array.prototype.slice.call(data));
+    }
+    const avcc = MP4.box(MP4.types.avcC, new Uint8Array([0x01,
+    // version
+    sps[3],
+    // profile
+    sps[4],
+    // profile compat
+    sps[5],
+    // level
+    0xfc | 3,
+    // lengthSizeMinusOne, hard-coded to 4 bytes
+    0xe0 | track.sps.length // 3bit reserved (111) + numOfSequenceParameterSets
+    ].concat(sps).concat([track.pps.length // numOfPictureParameterSets
+    ]).concat(pps))); // "PPS"
+    const width = track.width;
+    const height = track.height;
+    const hSpacing = track.pixelRatio[0];
+    const vSpacing = track.pixelRatio[1];
+    return MP4.box(MP4.types.avc1, new Uint8Array([0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x01,
+    // data_reference_index
+    0x00, 0x00,
+    // pre_defined
+    0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // pre_defined
+    width >> 8 & 0xff, width & 0xff,
+    // width
+    height >> 8 & 0xff, height & 0xff,
+    // height
+    0x00, 0x48, 0x00, 0x00,
+    // horizresolution
+    0x00, 0x48, 0x00, 0x00,
+    // vertresolution
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x01,
+    // frame_count
+    0x12, 0x64, 0x61, 0x69, 0x6c,
+    // dailymotion/hls.js
+    0x79, 0x6d, 0x6f, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x68, 0x6c, 0x73, 0x2e, 0x6a, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // compressorname
+    0x00, 0x18,
+    // depth = 24
+    0x11, 0x11]),
+    // pre_defined = -1
+    avcc, MP4.box(MP4.types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80,
+    // bufferSizeDB
+    0x00, 0x2d, 0xc6, 0xc0,
+    // maxBitrate
+    0x00, 0x2d, 0xc6, 0xc0])),
+    // avgBitrate
+    MP4.box(MP4.types.pasp, new Uint8Array([hSpacing >> 24,
+    // hSpacing
+    hSpacing >> 16 & 0xff, hSpacing >> 8 & 0xff, hSpacing & 0xff, vSpacing >> 24,
+    // vSpacing
+    vSpacing >> 16 & 0xff, vSpacing >> 8 & 0xff, vSpacing & 0xff])));
+  }
+  static esds(track) {
+    const config = track.config;
+    return new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+
+    0x03,
+    // descriptor_type
+    0x19,
+    // length
+
+    0x00, 0x01,
+    // es_id
+
+    0x00,
+    // stream_priority
+
+    0x04,
+    // descriptor_type
+    0x11,
+    // length
+    0x40,
+    // codec : mpeg4_audio
+    0x15,
+    // stream_type
+    0x00, 0x00, 0x00,
+    // buffer_size
+    0x00, 0x00, 0x00, 0x00,
+    // maxBitrate
+    0x00, 0x00, 0x00, 0x00,
+    // avgBitrate
+
+    0x05,
+    // descriptor_type
+    0x02,
+    // length
+    ...config, 0x06, 0x01, 0x02 // GASpecificConfig)); // length + audio config descriptor
+    ]);
+  }
+  static audioStsd(track) {
+    const samplerate = track.samplerate || 0;
+    return new Uint8Array([0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x01,
+    // data_reference_index
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, track.channelCount || 0,
+    // channelcount
+    0x00, 0x10,
+    // sampleSize:16bits
+    0x00, 0x00, 0x00, 0x00,
+    // reserved2
+    samplerate >> 8 & 0xff, samplerate & 0xff,
+    //
+    0x00, 0x00]);
+  }
+  static mp4a(track) {
+    return MP4.box(MP4.types.mp4a, MP4.audioStsd(track), MP4.box(MP4.types.esds, MP4.esds(track)));
+  }
+  static mp3(track) {
+    return MP4.box(MP4.types['.mp3'], MP4.audioStsd(track));
+  }
+  static ac3(track) {
+    return MP4.box(MP4.types['ac-3'], MP4.audioStsd(track), MP4.box(MP4.types.dac3, track.config));
+  }
+  static stsd(track) {
+    const {
+      segmentCodec
+    } = track;
+    if (track.type === 'audio') {
+      if (segmentCodec === 'aac') {
+        return MP4.box(MP4.types.stsd, MP4.STSD, MP4.mp4a(track));
+      }
+      if (segmentCodec === 'ac3' && track.config) {
+        return MP4.box(MP4.types.stsd, MP4.STSD, MP4.ac3(track));
+      }
+      if (segmentCodec === 'mp3' && track.codec === 'mp3') {
+        return MP4.box(MP4.types.stsd, MP4.STSD, MP4.mp3(track));
+      }
+    } else {
+      if (track.pps && track.sps) {
+        if (segmentCodec === 'avc') {
+          return MP4.box(MP4.types.stsd, MP4.STSD, MP4.avc1(track));
+        }
+        if (segmentCodec === 'hevc' && track.vps) {
+          return MP4.box(MP4.types.stsd, MP4.STSD, MP4.hvc1(track));
+        }
+      } else {
+        throw new Error(`video track missing pps or sps`);
+      }
+    }
+    throw new Error(`unsupported ${track.type} segment codec (${segmentCodec}/${track.codec})`);
+  }
+  static tkhd(track) {
+    const id = track.id;
+    const duration = (track.duration || 0) * (track.timescale || 0);
+    const width = track.width || 0;
+    const height = track.height || 0;
+    const upperWordDuration = Math.floor(duration / (UINT32_MAX + 1));
+    const lowerWordDuration = Math.floor(duration % (UINT32_MAX + 1));
+    return MP4.box(MP4.types.tkhd, new Uint8Array([0x01,
+    // version 1
+    0x00, 0x00, 0x07,
+    // flags
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
+    // creation_time
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
+    // modification_time
+    id >> 24 & 0xff, id >> 16 & 0xff, id >> 8 & 0xff, id & 0xff,
+    // track_ID
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    upperWordDuration >> 24, upperWordDuration >> 16 & 0xff, upperWordDuration >> 8 & 0xff, upperWordDuration & 0xff, lowerWordDuration >> 24, lowerWordDuration >> 16 & 0xff, lowerWordDuration >> 8 & 0xff, lowerWordDuration & 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00,
+    // layer
+    0x00, 0x00,
+    // alternate_group
+    0x00, 0x00,
+    // non-audio track volume
+    0x00, 0x00,
+    // reserved
+    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
+    // transformation: unity matrix
+    width >> 8 & 0xff, width & 0xff, 0x00, 0x00,
+    // width
+    height >> 8 & 0xff, height & 0xff, 0x00, 0x00 // height
+    ]));
+  }
+  static traf(track, baseMediaDecodeTime) {
+    const sampleDependencyTable = MP4.sdtp(track);
+    const id = track.id;
+    const upperWordBaseMediaDecodeTime = Math.floor(baseMediaDecodeTime / (UINT32_MAX + 1));
+    const lowerWordBaseMediaDecodeTime = Math.floor(baseMediaDecodeTime % (UINT32_MAX + 1));
+    return MP4.box(MP4.types.traf, MP4.box(MP4.types.tfhd, new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+    id >> 24, id >> 16 & 0xff, id >> 8 & 0xff, id & 0xff // track_ID
+    ])), MP4.box(MP4.types.tfdt, new Uint8Array([0x01,
+    // version 1
+    0x00, 0x00, 0x00,
+    // flags
+    upperWordBaseMediaDecodeTime >> 24, upperWordBaseMediaDecodeTime >> 16 & 0xff, upperWordBaseMediaDecodeTime >> 8 & 0xff, upperWordBaseMediaDecodeTime & 0xff, lowerWordBaseMediaDecodeTime >> 24, lowerWordBaseMediaDecodeTime >> 16 & 0xff, lowerWordBaseMediaDecodeTime >> 8 & 0xff, lowerWordBaseMediaDecodeTime & 0xff])), MP4.trun(track, sampleDependencyTable.length + 16 +
+    // tfhd
+    20 +
+    // tfdt
+    8 +
+    // traf header
+    16 +
+    // mfhd
+    8 +
+    // moof header
+    8),
+    // mdat header
+    sampleDependencyTable);
+  }
+
+  /**
+   * Generate a track box.
+   * @param track a track definition
+   */
+  static trak(track) {
+    track.duration = track.duration || 0xffffffff;
+    return MP4.box(MP4.types.trak, MP4.tkhd(track), MP4.mdia(track));
+  }
+  static trex(track) {
+    const id = track.id;
+    return MP4.box(MP4.types.trex, new Uint8Array([0x00,
+    // version 0
+    0x00, 0x00, 0x00,
+    // flags
+    id >> 24, id >> 16 & 0xff, id >> 8 & 0xff, id & 0xff,
+    // track_ID
+    0x00, 0x00, 0x00, 0x01,
+    // default_sample_description_index
+    0x00, 0x00, 0x00, 0x00,
+    // default_sample_duration
+    0x00, 0x00, 0x00, 0x00,
+    // default_sample_size
+    0x00, 0x01, 0x00, 0x01 // default_sample_flags
+    ]));
+  }
+  static trun(track, offset) {
+    const samples = track.samples || [];
+    const len = samples.length;
+    const arraylen = 12 + 16 * len;
+    const array = new Uint8Array(arraylen);
+    let i;
+    let sample;
+    let duration;
+    let size;
+    let flags;
+    let cts;
+    offset += 8 + arraylen;
+    array.set([track.type === 'video' ? 0x01 : 0x00,
+    // version 1 for video with signed-int sample_composition_time_offset
+    0x00, 0x0f, 0x01,
+    // flags
+    len >>> 24 & 0xff, len >>> 16 & 0xff, len >>> 8 & 0xff, len & 0xff,
+    // sample_count
+    offset >>> 24 & 0xff, offset >>> 16 & 0xff, offset >>> 8 & 0xff, offset & 0xff // data_offset
+    ], 0);
+    for (i = 0; i < len; i++) {
+      sample = samples[i];
+      duration = sample.duration;
+      size = sample.size;
+      flags = sample.flags;
+      cts = sample.cts;
+      array.set([duration >>> 24 & 0xff, duration >>> 16 & 0xff, duration >>> 8 & 0xff, duration & 0xff,
+      // sample_duration
+      size >>> 24 & 0xff, size >>> 16 & 0xff, size >>> 8 & 0xff, size & 0xff,
+      // sample_size
+      flags.isLeading << 2 | flags.dependsOn, flags.isDependedOn << 6 | flags.hasRedundancy << 4 | flags.paddingValue << 1 | flags.isNonSync, flags.degradPrio & 0xf0 << 8, flags.degradPrio & 0x0f,
+      // sample_flags
+      cts >>> 24 & 0xff, cts >>> 16 & 0xff, cts >>> 8 & 0xff, cts & 0xff // sample_composition_time_offset
+      ], 12 + 16 * i);
+    }
+    return MP4.box(MP4.types.trun, array);
+  }
+  static initSegment(tracks) {
+    if (!MP4.types) {
+      MP4.init();
+    }
+    const movie = MP4.moov(tracks);
+    const result = appendUint8Array(MP4.FTYP, movie);
+    return result;
+  }
+  static hvc1(track) {
+    const ps = track.params;
+    const units = [track.vps, track.sps, track.pps];
+    const NALuLengthSize = 4;
+    const config = new Uint8Array([0x01, ps.general_profile_space << 6 | (ps.general_tier_flag ? 32 : 0) | ps.general_profile_idc, ps.general_profile_compatibility_flags[0], ps.general_profile_compatibility_flags[1], ps.general_profile_compatibility_flags[2], ps.general_profile_compatibility_flags[3], ps.general_constraint_indicator_flags[0], ps.general_constraint_indicator_flags[1], ps.general_constraint_indicator_flags[2], ps.general_constraint_indicator_flags[3], ps.general_constraint_indicator_flags[4], ps.general_constraint_indicator_flags[5], ps.general_level_idc, 240 | ps.min_spatial_segmentation_idc >> 8, 255 & ps.min_spatial_segmentation_idc, 252 | ps.parallelismType, 252 | ps.chroma_format_idc, 248 | ps.bit_depth_luma_minus8, 248 | ps.bit_depth_chroma_minus8, 0x00, parseInt(ps.frame_rate.fps), NALuLengthSize - 1 | ps.temporal_id_nested << 2 | ps.num_temporal_layers << 3 | (ps.frame_rate.fixed ? 64 : 0), units.length]);
+
+    // compute hvcC size in bytes
+    let length = config.length;
+    for (let i = 0; i < units.length; i += 1) {
+      length += 3;
+      for (let j = 0; j < units[i].length; j += 1) {
+        length += 2 + units[i][j].length;
+      }
+    }
+    const hvcC = new Uint8Array(length);
+    hvcC.set(config, 0);
+    length = config.length;
+    // append parameter set units: one vps, one or more sps and pps
+    const iMax = units.length - 1;
+    for (let i = 0; i < units.length; i += 1) {
+      hvcC.set(new Uint8Array([32 + i | (i === iMax ? 128 : 0), 0x00, units[i].length]), length);
+      length += 3;
+      for (let j = 0; j < units[i].length; j += 1) {
+        hvcC.set(new Uint8Array([units[i][j].length >> 8, units[i][j].length & 255]), length);
+        length += 2;
+        hvcC.set(units[i][j], length);
+        length += units[i][j].length;
+      }
+    }
+    const hvcc = MP4.box(MP4.types.hvcC, hvcC);
+    const width = track.width;
+    const height = track.height;
+    const hSpacing = track.pixelRatio[0];
+    const vSpacing = track.pixelRatio[1];
+    return MP4.box(MP4.types.hvc1, new Uint8Array([0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x01,
+    // data_reference_index
+    0x00, 0x00,
+    // pre_defined
+    0x00, 0x00,
+    // reserved
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // pre_defined
+    width >> 8 & 0xff, width & 0xff,
+    // width
+    height >> 8 & 0xff, height & 0xff,
+    // height
+    0x00, 0x48, 0x00, 0x00,
+    // horizresolution
+    0x00, 0x48, 0x00, 0x00,
+    // vertresolution
+    0x00, 0x00, 0x00, 0x00,
+    // reserved
+    0x00, 0x01,
+    // frame_count
+    0x12, 0x64, 0x61, 0x69, 0x6c,
+    // dailymotion/hls.js
+    0x79, 0x6d, 0x6f, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x68, 0x6c, 0x73, 0x2e, 0x6a, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    // compressorname
+    0x00, 0x18,
+    // depth = 24
+    0x11, 0x11]),
+    // pre_defined = -1
+    hvcc, MP4.box(MP4.types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80,
+    // bufferSizeDB
+    0x00, 0x2d, 0xc6, 0xc0,
+    // maxBitrate
+    0x00, 0x2d, 0xc6, 0xc0])),
+    // avgBitrate
+    MP4.box(MP4.types.pasp, new Uint8Array([hSpacing >> 24,
+    // hSpacing
+    hSpacing >> 16 & 0xff, hSpacing >> 8 & 0xff, hSpacing & 0xff, vSpacing >> 24,
+    // vSpacing
+    vSpacing >> 16 & 0xff, vSpacing >> 8 & 0xff, vSpacing & 0xff])));
+  }
+}
+MP4.types = void 0;
+MP4.HDLR_TYPES = void 0;
+MP4.STTS = void 0;
+MP4.STSC = void 0;
+MP4.STCO = void 0;
+MP4.STSZ = void 0;
+MP4.VMHD = void 0;
+MP4.SMHD = void 0;
+MP4.STSD = void 0;
+MP4.FTYP = void 0;
+MP4.DINF = void 0;
+
+const MPEG_TS_CLOCK_FREQ_HZ = 90000;
+function toTimescaleFromBase(baseTime, destScale, srcBase = 1, round = false) {
+  const result = baseTime * destScale * srcBase; // equivalent to `(value * scale) / (1 / base)`
+  return round ? Math.round(result) : result;
+}
+function toTimescaleFromScale(baseTime, destScale, srcScale = 1, round = false) {
+  return toTimescaleFromBase(baseTime, destScale, 1 / srcScale, round);
+}
+function toMsFromMpegTsClock(baseTime, round = false) {
+  return toTimescaleFromBase(baseTime, 1000, 1 / MPEG_TS_CLOCK_FREQ_HZ, round);
+}
+function toMpegTsClockFromTimescale(baseTime, srcScale = 1) {
+  return toTimescaleFromBase(baseTime, MPEG_TS_CLOCK_FREQ_HZ, 1 / srcScale);
+}
+function timestampToString(timestamp) {
+  const {
+    baseTime,
+    timescale,
+    trackId
+  } = timestamp;
+  return `${baseTime / timescale} (${baseTime}/${timescale}) trackId: ${trackId}`;
+}
+
+const MAX_SILENT_FRAME_DURATION = 10 * 1000; // 10 seconds
+const AAC_SAMPLES_PER_FRAME = 1024;
+const MPEG_AUDIO_SAMPLE_PER_FRAME = 1152;
+const AC3_SAMPLES_PER_FRAME = 1536;
+let chromeVersion = null;
+let safariWebkitVersion = null;
+function createMp4Sample(isKeyframe, duration, size, cts) {
+  return {
+    duration,
+    size,
+    cts,
+    flags: {
+      isLeading: 0,
+      isDependedOn: 0,
+      hasRedundancy: 0,
+      degradPrio: 0,
+      dependsOn: isKeyframe ? 2 : 1,
+      isNonSync: isKeyframe ? 0 : 1
+    }
+  };
+}
+class MP4Remuxer extends Logger {
+  constructor(observer, config, typeSupported, logger) {
+    super('mp4-remuxer', logger);
+    this.observer = void 0;
+    this.config = void 0;
+    this.typeSupported = void 0;
+    this.ISGenerated = false;
+    this._initPTS = null;
+    this._initDTS = null;
+    this.nextVideoTs = null;
+    this.nextAudioTs = null;
+    this.videoSampleDuration = null;
+    this.isAudioContiguous = false;
+    this.isVideoContiguous = false;
+    this.videoTrackConfig = void 0;
+    this.observer = observer;
+    this.config = config;
+    this.typeSupported = typeSupported;
+    this.ISGenerated = false;
+    if (chromeVersion === null) {
+      const userAgent = navigator.userAgent || '';
+      const result = userAgent.match(/Chrome\/(\d+)/i);
+      chromeVersion = result ? parseInt(result[1]) : 0;
+    }
+    if (safariWebkitVersion === null) {
+      const result = navigator.userAgent.match(/Safari\/(\d+)/i);
+      safariWebkitVersion = result ? parseInt(result[1]) : 0;
+    }
+  }
+  destroy() {
+    // @ts-ignore
+    this.config = this.videoTrackConfig = this._initPTS = this._initDTS = null;
+  }
+  resetTimeStamp(defaultTimeStamp) {
+    const initPTS = this._initPTS;
+    if (!initPTS || !defaultTimeStamp || defaultTimeStamp.trackId !== initPTS.trackId || defaultTimeStamp.baseTime !== initPTS.baseTime || defaultTimeStamp.timescale !== initPTS.timescale) {
+      this.log(`Reset initPTS: ${initPTS ? timestampToString(initPTS) : initPTS} > ${defaultTimeStamp ? timestampToString(defaultTimeStamp) : defaultTimeStamp}`);
+    }
+    this._initPTS = this._initDTS = defaultTimeStamp;
+  }
+  resetNextTimestamp() {
+    this.log('reset next timestamp');
+    this.isVideoContiguous = false;
+    this.isAudioContiguous = false;
+  }
+  resetInitSegment() {
+    this.log('ISGenerated flag reset');
+    this.ISGenerated = false;
+    this.videoTrackConfig = undefined;
+  }
+  getVideoStartPts(videoSamples) {
+    // Get the minimum PTS value relative to the first sample's PTS, normalized for 33-bit wrapping
+    let rolloverDetected = false;
+    const firstPts = videoSamples[0].pts;
+    const startPTS = videoSamples.reduce((minPTS, sample) => {
+      let pts = sample.pts;
+      let delta = pts - minPTS;
+      if (delta < -4294967296) {
+        // 2^32, see PTSNormalize for reasoning, but we're hitting a rollover here, and we don't want that to impact the timeOffset calculation
+        rolloverDetected = true;
+        pts = normalizePts(pts, firstPts);
+        delta = pts - minPTS;
+      }
+      if (delta > 0) {
+        return minPTS;
+      }
+      return pts;
+    }, firstPts);
+    if (rolloverDetected) {
+      this.debug('PTS rollover detected');
+    }
+    return startPTS;
+  }
+  remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset, flush, playlistType) {
+    let video;
+    let audio;
+    let initSegment;
+    let text;
+    let id3;
+    let independent;
+    let audioTimeOffset = timeOffset;
+    let videoTimeOffset = timeOffset;
+
+    // If we're remuxing audio and video progressively, wait until we've received enough samples for each track before proceeding.
+    // This is done to synchronize the audio and video streams. We know if the current segment will have samples if the "pid"
+    // parameter is greater than -1. The pid is set when the PMT is parsed, which contains the tracks list.
+    // However, if the initSegment has already been generated, or we've reached the end of a segment (flush),
+    // then we can remux one track without waiting for the other.
+    const hasAudio = audioTrack.pid > -1;
+    const hasVideo = videoTrack.pid > -1;
+    const length = videoTrack.samples.length;
+    const enoughAudioSamples = audioTrack.samples.length > 0;
+    const enoughVideoSamples = flush && length > 0 || length > 1;
+    const canRemuxAvc = (!hasAudio || enoughAudioSamples) && (!hasVideo || enoughVideoSamples) || this.ISGenerated || flush;
+    if (canRemuxAvc) {
+      if (this.ISGenerated) {
+        var _videoTrack$pixelRati, _config$pixelRatio, _videoTrack$pixelRati2, _config$pixelRatio2;
+        const config = this.videoTrackConfig;
+        if (config && (videoTrack.width !== config.width || videoTrack.height !== config.height || ((_videoTrack$pixelRati = videoTrack.pixelRatio) == null ? void 0 : _videoTrack$pixelRati[0]) !== ((_config$pixelRatio = config.pixelRatio) == null ? void 0 : _config$pixelRatio[0]) || ((_videoTrack$pixelRati2 = videoTrack.pixelRatio) == null ? void 0 : _videoTrack$pixelRati2[1]) !== ((_config$pixelRatio2 = config.pixelRatio) == null ? void 0 : _config$pixelRatio2[1])) || !config && enoughVideoSamples || this.nextAudioTs === null && enoughAudioSamples) {
+          this.resetInitSegment();
+        }
+      }
+      if (!this.ISGenerated) {
+        initSegment = this.generateIS(audioTrack, videoTrack, timeOffset, accurateTimeOffset);
+      }
+      const isVideoContiguous = this.isVideoContiguous;
+      let firstKeyFrameIndex = -1;
+      let firstKeyFramePTS;
+      if (enoughVideoSamples) {
+        firstKeyFrameIndex = findKeyframeIndex(videoTrack.samples);
+        if (!isVideoContiguous && this.config.forceKeyFrameOnDiscontinuity) {
+          independent = true;
+          if (firstKeyFrameIndex > 0) {
+            this.warn(`Dropped ${firstKeyFrameIndex} out of ${length} video samples due to a missing keyframe`);
+            const startPTS = this.getVideoStartPts(videoTrack.samples);
+            videoTrack.samples = videoTrack.samples.slice(firstKeyFrameIndex);
+            videoTrack.dropped += firstKeyFrameIndex;
+            videoTimeOffset += (videoTrack.samples[0].pts - startPTS) / videoTrack.inputTimeScale;
+            firstKeyFramePTS = videoTimeOffset;
+          } else if (firstKeyFrameIndex === -1) {
+            this.warn(`No keyframe found out of ${length} video samples`);
+            independent = false;
+          }
+        }
+      }
+      if (this.ISGenerated) {
+        if (enoughAudioSamples && enoughVideoSamples) {
+          // timeOffset is expected to be the offset of the first timestamp of this fragment (first DTS)
+          // if first audio DTS is not aligned with first video DTS then we need to take that into account
+          // when providing timeOffset to remuxAudio / remuxVideo. if we don't do that, there might be a permanent / small
+          // drift between audio and video streams
+          const startPTS = this.getVideoStartPts(videoTrack.samples);
+          const tsDelta = normalizePts(audioTrack.samples[0].pts, startPTS) - startPTS;
+          const audiovideoTimestampDelta = tsDelta / videoTrack.inputTimeScale;
+          audioTimeOffset += Math.max(0, audiovideoTimestampDelta);
+          videoTimeOffset += Math.max(0, -audiovideoTimestampDelta);
+        }
+
+        // Purposefully remuxing audio before video, so that remuxVideo can use nextAudioPts, which is calculated in remuxAudio.
+        if (enoughAudioSamples) {
+          // if initSegment was generated without audio samples, regenerate it again
+          if (!audioTrack.samplerate) {
+            this.warn('regenerate InitSegment as audio detected');
+            initSegment = this.generateIS(audioTrack, videoTrack, timeOffset, accurateTimeOffset);
+          }
+          audio = this.remuxAudio(audioTrack, audioTimeOffset, this.isAudioContiguous, accurateTimeOffset, hasVideo || enoughVideoSamples || playlistType === PlaylistLevelType.AUDIO ? videoTimeOffset : undefined);
+          if (enoughVideoSamples) {
+            const audioTrackLength = audio ? audio.endPTS - audio.startPTS : 0;
+            // if initSegment was generated without video samples, regenerate it again
+            if (!videoTrack.inputTimeScale) {
+              this.warn('regenerate InitSegment as video detected');
+              initSegment = this.generateIS(audioTrack, videoTrack, timeOffset, accurateTimeOffset);
+            }
+            video = this.remuxVideo(videoTrack, videoTimeOffset, isVideoContiguous, audioTrackLength);
+          }
+        } else if (enoughVideoSamples) {
+          video = this.remuxVideo(videoTrack, videoTimeOffset, isVideoContiguous, 0);
+        }
+        if (video) {
+          video.firstKeyFrame = firstKeyFrameIndex;
+          video.independent = firstKeyFrameIndex !== -1;
+          video.firstKeyFramePTS = firstKeyFramePTS;
+        }
+      }
+    }
+
+    // Allow ID3 and text to remux, even if more audio/video samples are required
+    if (this.ISGenerated && this._initPTS && this._initDTS) {
+      if (id3Track.samples.length) {
+        id3 = flushTextTrackMetadataCueSamples(id3Track, timeOffset, this._initPTS, this._initDTS);
+      }
+      if (textTrack.samples.length) {
+        text = flushTextTrackUserdataCueSamples(textTrack, timeOffset, this._initPTS);
+      }
+    }
+    return {
+      audio,
+      video,
+      initSegment,
+      independent,
+      text,
+      id3
+    };
+  }
+  computeInitPts(basetime, timescale, presentationTime, type) {
+    const offset = Math.round(presentationTime * timescale);
+    let timestamp = normalizePts(basetime, offset);
+    if (timestamp < offset + timescale) {
+      this.log(`Adjusting PTS for rollover in timeline near ${(offset - timestamp) / timescale} ${type}`);
+      while (timestamp < offset + timescale) {
+        timestamp += 8589934592;
+      }
+    }
+    return timestamp - offset;
+  }
+  generateIS(audioTrack, videoTrack, timeOffset, accurateTimeOffset) {
+    const audioSamples = audioTrack.samples;
+    const videoSamples = videoTrack.samples;
+    const typeSupported = this.typeSupported;
+    const tracks = {};
+    const _initPTS = this._initPTS;
+    let computePTSDTS = !_initPTS || accurateTimeOffset;
+    let container = 'audio/mp4';
+    let initPTS;
+    let initDTS;
+    let timescale;
+    let trackId = -1;
+    if (computePTSDTS) {
+      initPTS = initDTS = Infinity;
+    }
+    if (audioTrack.config && audioSamples.length) {
+      // let's use audio sampling rate as MP4 time scale.
+      // rationale is that there is a integer nb of audio frames per audio sample (1024 for AAC)
+      // using audio sampling rate here helps having an integer MP4 frame duration
+      // this avoids potential rounding issue and AV sync issue
+      audioTrack.timescale = audioTrack.samplerate;
+      switch (audioTrack.segmentCodec) {
+        case 'mp3':
+          if (typeSupported.mpeg) {
+            // Chrome and Safari
+            container = 'audio/mpeg';
+            audioTrack.codec = '';
+          } else if (typeSupported.mp3) {
+            // Firefox
+            audioTrack.codec = 'mp3';
+          }
+          break;
+        case 'ac3':
+          audioTrack.codec = 'ac-3';
+          break;
+      }
+      tracks.audio = {
+        id: 'audio',
+        container: container,
+        codec: audioTrack.codec,
+        initSegment: audioTrack.segmentCodec === 'mp3' && typeSupported.mpeg ? new Uint8Array(0) : MP4.initSegment([audioTrack]),
+        metadata: {
+          channelCount: audioTrack.channelCount
+        }
+      };
+      if (computePTSDTS) {
+        trackId = audioTrack.id;
+        timescale = audioTrack.inputTimeScale;
+        if (!_initPTS || timescale !== _initPTS.timescale) {
+          // remember first PTS of this demuxing context. for audio, PTS = DTS
+          initPTS = initDTS = this.computeInitPts(audioSamples[0].pts, timescale, timeOffset, 'audio');
+        } else {
+          computePTSDTS = false;
+        }
+      }
+    }
+    if (videoTrack.sps && videoTrack.pps && videoSamples.length) {
+      // let's use input time scale as MP4 video timescale
+      // we use input time scale straight away to avoid rounding issues on frame duration / cts computation
+      videoTrack.timescale = videoTrack.inputTimeScale;
+      tracks.video = {
+        id: 'main',
+        container: 'video/mp4',
+        codec: videoTrack.codec,
+        initSegment: MP4.initSegment([videoTrack]),
+        metadata: {
+          width: videoTrack.width,
+          height: videoTrack.height
+        }
+      };
+      if (computePTSDTS) {
+        trackId = videoTrack.id;
+        timescale = videoTrack.inputTimeScale;
+        if (!_initPTS || timescale !== _initPTS.timescale) {
+          const basePTS = this.getVideoStartPts(videoSamples);
+          const baseDTS = normalizePts(videoSamples[0].dts, basePTS);
+          const videoInitDTS = this.computeInitPts(baseDTS, timescale, timeOffset, 'video');
+          const videoInitPTS = this.computeInitPts(basePTS, timescale, timeOffset, 'video');
+          initDTS = Math.min(initDTS, videoInitDTS);
+          initPTS = Math.min(initPTS, videoInitPTS);
+        } else {
+          computePTSDTS = false;
+        }
+      }
+      this.videoTrackConfig = {
+        width: videoTrack.width,
+        height: videoTrack.height,
+        pixelRatio: videoTrack.pixelRatio
+      };
+    }
+    if (Object.keys(tracks).length) {
+      this.ISGenerated = true;
+      if (computePTSDTS) {
+        if (_initPTS) {
+          this.warn(`Timestamps at playlist time: ${accurateTimeOffset ? '' : '~'}${timeOffset} ${initPTS / timescale} != initPTS: ${_initPTS.baseTime / _initPTS.timescale} (${_initPTS.baseTime}/${_initPTS.timescale}) trackId: ${_initPTS.trackId}`);
+        }
+        this.log(`Found initPTS at playlist time: ${timeOffset} offset: ${initPTS / timescale} (${initPTS}/${timescale}) trackId: ${trackId}`);
+        this._initPTS = {
+          baseTime: initPTS,
+          timescale: timescale,
+          trackId: trackId
+        };
+        this._initDTS = {
+          baseTime: initDTS,
+          timescale: timescale,
+          trackId: trackId
+        };
+      } else {
+        initPTS = timescale = undefined;
+      }
+      return {
+        tracks,
+        initPTS,
+        timescale,
+        trackId
+      };
+    }
+  }
+  remuxVideo(track, timeOffset, contiguous, audioTrackLength) {
+    const timeScale = track.inputTimeScale;
+    const inputSamples = track.samples;
+    const outputSamples = [];
+    const nbSamples = inputSamples.length;
+    const initPTS = this._initPTS;
+    const initTime = initPTS.baseTime * timeScale / initPTS.timescale;
+    let nextVideoTs = this.nextVideoTs;
+    let offset = 8;
+    let mp4SampleDuration = this.videoSampleDuration;
+    let firstDTS;
+    let lastDTS;
+    let minPTS = Number.POSITIVE_INFINITY;
+    let maxPTS = Number.NEGATIVE_INFINITY;
+    let sortSamples = false;
+
+    // if parsed fragment is contiguous with last one, let's use last DTS value as reference
+    if (!contiguous || nextVideoTs === null) {
+      const pts = initTime + timeOffset * timeScale;
+      const cts = inputSamples[0].pts - normalizePts(inputSamples[0].dts, inputSamples[0].pts);
+      if (chromeVersion && nextVideoTs !== null && Math.abs(pts - cts - (nextVideoTs + initTime)) < 15000) {
+        // treat as contigous to adjust samples that would otherwise produce video buffer gaps in Chrome
+        contiguous = true;
+      } else {
+        // if not contiguous, let's use target timeOffset
+        nextVideoTs = pts - cts - initTime;
+      }
+    }
+
+    // PTS is coded on 33bits, and can loop from -2^32 to 2^32
+    // PTSNormalize will make PTS/DTS value monotonic, we use last known DTS value as reference value
+    const nextVideoPts = nextVideoTs + initTime;
+    for (let i = 0; i < nbSamples; i++) {
+      const sample = inputSamples[i];
+      sample.pts = normalizePts(sample.pts, nextVideoPts);
+      sample.dts = normalizePts(sample.dts, nextVideoPts);
+      if (sample.dts < inputSamples[i > 0 ? i - 1 : i].dts) {
+        sortSamples = true;
+      }
+    }
+
+    // sort video samples by DTS then PTS then demux id order
+    if (sortSamples) {
+      inputSamples.sort(function (a, b) {
+        const deltadts = a.dts - b.dts;
+        const deltapts = a.pts - b.pts;
+        return deltadts || deltapts;
+      });
+    }
+
+    // Get first/last DTS
+    firstDTS = inputSamples[0].dts;
+    lastDTS = inputSamples[inputSamples.length - 1].dts;
+
+    // Sample duration (as expected by trun MP4 boxes), should be the delta between sample DTS
+    // set this constant duration as being the avg delta between consecutive DTS.
+    const inputDuration = lastDTS - firstDTS;
+    const averageSampleDuration = inputDuration ? Math.round(inputDuration / (nbSamples - 1)) : mp4SampleDuration || track.inputTimeScale / 30;
+
+    // if fragment are contiguous, detect hole/overlapping between fragments
+    if (contiguous) {
+      // check timestamp continuity across consecutive fragments (this is to remove inter-fragment gap/hole)
+      const delta = firstDTS - nextVideoPts;
+      const foundHole = delta > averageSampleDuration;
+      const foundOverlap = delta < -1;
+      if (foundHole || foundOverlap) {
+        if (foundHole) {
+          this.warn(`${(track.segmentCodec || '').toUpperCase()}: ${toMsFromMpegTsClock(delta, true)} ms (${delta}dts) hole between fragments detected at ${timeOffset.toFixed(3)}`);
+        } else {
+          this.warn(`${(track.segmentCodec || '').toUpperCase()}: ${toMsFromMpegTsClock(-delta, true)} ms (${delta}dts) overlapping between fragments detected at ${timeOffset.toFixed(3)}`);
+        }
+        if (!foundOverlap || nextVideoPts >= inputSamples[0].pts || chromeVersion) {
+          firstDTS = nextVideoPts;
+          const firstPTS = inputSamples[0].pts - delta;
+          if (foundHole) {
+            inputSamples[0].dts = firstDTS;
+            inputSamples[0].pts = firstPTS;
+          } else {
+            let isPTSOrderRetained = true;
+            for (let i = 0; i < inputSamples.length; i++) {
+              if (inputSamples[i].dts > firstPTS && isPTSOrderRetained) {
+                break;
+              }
+              const prevPTS = inputSamples[i].pts;
+              inputSamples[i].dts -= delta;
+              inputSamples[i].pts -= delta;
+
+              // check to see if this sample's PTS order has changed
+              // relative to the next one
+              if (i < inputSamples.length - 1) {
+                const nextSamplePTS = inputSamples[i + 1].pts;
+                const currentSamplePTS = inputSamples[i].pts;
+                const currentOrder = nextSamplePTS <= currentSamplePTS;
+                const prevOrder = nextSamplePTS <= prevPTS;
+                isPTSOrderRetained = currentOrder == prevOrder;
+              }
+            }
+          }
+          this.log(`Video: Initial PTS/DTS adjusted: ${toMsFromMpegTsClock(firstPTS, true)}/${toMsFromMpegTsClock(firstDTS, true)}, delta: ${toMsFromMpegTsClock(delta, true)} ms`);
+        }
+      }
+    }
+    firstDTS = Math.max(0, firstDTS);
+    let nbNalu = 0;
+    let naluLen = 0;
+    let dtsStep = firstDTS;
+    for (let i = 0; i < nbSamples; i++) {
+      // compute total/avc sample length and nb of NAL units
+      const sample = inputSamples[i];
+      const units = sample.units;
+      const nbUnits = units.length;
+      let sampleLen = 0;
+      for (let j = 0; j < nbUnits; j++) {
+        sampleLen += units[j].data.length;
+      }
+      naluLen += sampleLen;
+      nbNalu += nbUnits;
+      sample.length = sampleLen;
+
+      // ensure sample monotonic DTS
+      if (sample.dts < dtsStep) {
+        sample.dts = dtsStep;
+        dtsStep += averageSampleDuration / 4 | 0 || 1;
+      } else {
+        dtsStep = sample.dts;
+      }
+      minPTS = Math.min(sample.pts, minPTS);
+      maxPTS = Math.max(sample.pts, maxPTS);
+    }
+    lastDTS = inputSamples[nbSamples - 1].dts;
+
+    /* concatenate the video data and construct the mdat in place
+      (need 8 more bytes to fill length and mpdat type) */
+    const mdatSize = naluLen + 4 * nbNalu + 8;
+    let mdat;
+    try {
+      mdat = new Uint8Array(mdatSize);
+    } catch (err) {
+      this.observer.emit(Events.ERROR, Events.ERROR, {
+        type: ErrorTypes.MUX_ERROR,
+        details: ErrorDetails.REMUX_ALLOC_ERROR,
+        fatal: false,
+        error: err,
+        bytes: mdatSize,
+        reason: `fail allocating video mdat ${mdatSize}`
+      });
+      return;
+    }
+    const view = new DataView(mdat.buffer);
+    view.setUint32(0, mdatSize);
+    mdat.set(MP4.types.mdat, 4);
+    let stretchedLastFrame = false;
+    let minDtsDelta = Number.POSITIVE_INFINITY;
+    let minPtsDelta = Number.POSITIVE_INFINITY;
+    let maxDtsDelta = Number.NEGATIVE_INFINITY;
+    let maxPtsDelta = Number.NEGATIVE_INFINITY;
+    for (let i = 0; i < nbSamples; i++) {
+      const VideoSample = inputSamples[i];
+      const VideoSampleUnits = VideoSample.units;
+      let mp4SampleLength = 0;
+      // convert NALU bitstream to MP4 format (prepend NALU with size field)
+      for (let j = 0, nbUnits = VideoSampleUnits.length; j < nbUnits; j++) {
+        const unit = VideoSampleUnits[j];
+        const unitData = unit.data;
+        const unitDataLen = unit.data.byteLength;
+        view.setUint32(offset, unitDataLen);
+        offset += 4;
+        mdat.set(unitData, offset);
+        offset += unitDataLen;
+        mp4SampleLength += 4 + unitDataLen;
+      }
+
+      // expected sample duration is the Decoding Timestamp diff of consecutive samples
+      let ptsDelta;
+      if (i < nbSamples - 1) {
+        mp4SampleDuration = inputSamples[i + 1].dts - VideoSample.dts;
+        ptsDelta = inputSamples[i + 1].pts - VideoSample.pts;
+      } else {
+        const config = this.config;
+        const lastFrameDuration = i > 0 ? VideoSample.dts - inputSamples[i - 1].dts : averageSampleDuration;
+        ptsDelta = i > 0 ? VideoSample.pts - inputSamples[i - 1].pts : averageSampleDuration;
+        if (config.stretchShortVideoTrack && this.nextAudioTs !== null) {
+          // In some cases, a segment's audio track duration may exceed the video track duration.
+          // Since we've already remuxed audio, and we know how long the audio track is, we look to
+          // see if the delta to the next segment is longer than maxBufferHole.
+          // If so, playback would potentially get stuck, so we artificially inflate
+          // the duration of the last frame to minimize any potential gap between segments.
+          const gapTolerance = Math.floor(config.maxBufferHole * timeScale);
+          const deltaToFrameEnd = (audioTrackLength ? minPTS + audioTrackLength * timeScale : this.nextAudioTs + initTime) - VideoSample.pts;
+          if (deltaToFrameEnd > gapTolerance) {
+            // We subtract lastFrameDuration from deltaToFrameEnd to try to prevent any video
+            // frame overlap. maxBufferHole should be >> lastFrameDuration anyway.
+            mp4SampleDuration = deltaToFrameEnd - lastFrameDuration;
+            if (mp4SampleDuration < 0) {
+              mp4SampleDuration = lastFrameDuration;
+            } else {
+              stretchedLastFrame = true;
+            }
+            this.log(`It is approximately ${deltaToFrameEnd / 90} ms to the next segment; using duration ${mp4SampleDuration / 90} ms for the last video frame.`);
+          } else {
+            mp4SampleDuration = lastFrameDuration;
+          }
+        } else {
+          mp4SampleDuration = lastFrameDuration;
+        }
+      }
+      const compositionTimeOffset = Math.round(VideoSample.pts - VideoSample.dts);
+      minDtsDelta = Math.min(minDtsDelta, mp4SampleDuration);
+      maxDtsDelta = Math.max(maxDtsDelta, mp4SampleDuration);
+      minPtsDelta = Math.min(minPtsDelta, ptsDelta);
+      maxPtsDelta = Math.max(maxPtsDelta, ptsDelta);
+      outputSamples.push(createMp4Sample(VideoSample.key, mp4SampleDuration, mp4SampleLength, compositionTimeOffset));
+    }
+    if (outputSamples.length) {
+      if (chromeVersion) {
+        if (chromeVersion < 70) {
+          // Chrome workaround, mark first sample as being a Random Access Point (keyframe) to avoid sourcebuffer append issue
+          // https://code.google.com/p/chromium/issues/detail?id=229412
+          const flags = outputSamples[0].flags;
+          flags.dependsOn = 2;
+          flags.isNonSync = 0;
+        }
+      } else if (safariWebkitVersion) {
+        // Fix for "CNN special report, with CC" in test-streams (Safari browser only)
+        // Ignore DTS when frame durations are irregular. Safari MSE does not handle this leading to gaps.
+        if (maxPtsDelta - minPtsDelta < maxDtsDelta - minDtsDelta && averageSampleDuration / maxDtsDelta < 0.025 && outputSamples[0].cts === 0) {
+          this.warn('Found irregular gaps in sample duration. Using PTS instead of DTS to determine MP4 sample duration.');
+          let dts = firstDTS;
+          for (let i = 0, len = outputSamples.length; i < len; i++) {
+            const nextDts = dts + outputSamples[i].duration;
+            const pts = dts + outputSamples[i].cts;
+            if (i < len - 1) {
+              const nextPts = nextDts + outputSamples[i + 1].cts;
+              outputSamples[i].duration = nextPts - pts;
+            } else {
+              outputSamples[i].duration = i ? outputSamples[i - 1].duration : averageSampleDuration;
+            }
+            outputSamples[i].cts = 0;
+            dts = nextDts;
+          }
+        }
+      }
+    }
+    // next AVC/HEVC sample DTS should be equal to last sample DTS + last sample duration (in PES timescale)
+    mp4SampleDuration = stretchedLastFrame || !mp4SampleDuration ? averageSampleDuration : mp4SampleDuration;
+    const endDTS = lastDTS + mp4SampleDuration;
+    this.nextVideoTs = nextVideoTs = endDTS - initTime;
+    this.videoSampleDuration = mp4SampleDuration;
+    this.isVideoContiguous = true;
+    const moof = MP4.moof(track.sequenceNumber++, firstDTS, _extends(track, {
+      samples: outputSamples
+    }));
+    const type = 'video';
+    const data = {
+      data1: moof,
+      data2: mdat,
+      startPTS: (minPTS - initTime) / timeScale,
+      endPTS: (maxPTS + mp4SampleDuration - initTime) / timeScale,
+      startDTS: (firstDTS - initTime) / timeScale,
+      endDTS: nextVideoTs / timeScale,
+      type,
+      hasAudio: false,
+      hasVideo: true,
+      nb: outputSamples.length,
+      dropped: track.dropped
+    };
+    track.samples = [];
+    track.dropped = 0;
+    return data;
+  }
+  getSamplesPerFrame(track) {
+    switch (track.segmentCodec) {
+      case 'mp3':
+        return MPEG_AUDIO_SAMPLE_PER_FRAME;
+      case 'ac3':
+        return AC3_SAMPLES_PER_FRAME;
+      default:
+        return AAC_SAMPLES_PER_FRAME;
+    }
+  }
+  remuxAudio(track, timeOffset, contiguous, accurateTimeOffset, videoTimeOffset) {
+    const inputTimeScale = track.inputTimeScale;
+    const mp4timeScale = track.samplerate ? track.samplerate : inputTimeScale;
+    const scaleFactor = inputTimeScale / mp4timeScale;
+    const mp4SampleDuration = this.getSamplesPerFrame(track);
+    const inputSampleDuration = mp4SampleDuration * scaleFactor;
+    const initPTS = this._initPTS;
+    const rawMPEG = track.segmentCodec === 'mp3' && this.typeSupported.mpeg;
+    const outputSamples = [];
+    const alignedWithVideo = videoTimeOffset !== undefined;
+    let inputSamples = track.samples;
+    let offset = rawMPEG ? 0 : 8;
+    let nextAudioTs = this.nextAudioTs || -1;
+
+    // window.audioSamples ? window.audioSamples.push(inputSamples.map(s => s.pts)) : (window.audioSamples = [inputSamples.map(s => s.pts)]);
+
+    // for audio samples, also consider consecutive fragments as being contiguous (even if a level switch occurs),
+    // for sake of clarity:
+    // consecutive fragments are frags with
+    //  - less than 100ms gaps between new time offset (if accurate) and next expected PTS OR
+    //  - less than 20 audio frames distance
+    // contiguous fragments are consecutive fragments from same quality level (same level, new SN = old SN + 1)
+    // this helps ensuring audio continuity
+    // and this also avoids audio glitches/cut when switching quality, or reporting wrong duration on first audio frame
+    const initTime = initPTS.baseTime * inputTimeScale / initPTS.timescale;
+    const timeOffsetMpegTS = initTime + timeOffset * inputTimeScale;
+    this.isAudioContiguous = contiguous = contiguous || inputSamples.length && nextAudioTs > 0 && (accurateTimeOffset && Math.abs(timeOffsetMpegTS - (nextAudioTs + initTime)) < 9000 || Math.abs(normalizePts(inputSamples[0].pts, timeOffsetMpegTS) - (nextAudioTs + initTime)) < 20 * inputSampleDuration);
+
+    // compute normalized PTS
+    inputSamples.forEach(function (sample) {
+      sample.pts = normalizePts(sample.pts, timeOffsetMpegTS);
+    });
+    if (!contiguous || nextAudioTs < 0) {
+      const sampleCount = inputSamples.length;
+      // filter out sample with negative PTS that are not playable anyway
+      // if we don't remove these negative samples, they will shift all audio samples forward.
+      // leading to audio overlap between current / next fragment
+      inputSamples = inputSamples.filter(sample => sample.pts >= 0);
+      if (sampleCount !== inputSamples.length) {
+        this.warn(`Removed ${inputSamples.length - sampleCount} of ${sampleCount} samples (initPTS ${initTime} / ${inputTimeScale})`);
+      }
+
+      // in case all samples have negative PTS, and have been filtered out, return now
+      if (!inputSamples.length) {
+        return;
+      }
+      if (videoTimeOffset === 0) {
+        // Set the start to match video so that start gaps larger than inputSampleDuration are filled with silence
+        nextAudioTs = 0;
+      } else if (accurateTimeOffset && !alignedWithVideo) {
+        // When not seeking, not live, and LevelDetails.PTSKnown, use fragment start as predicted next audio PTS
+        nextAudioTs = Math.max(0, timeOffsetMpegTS - initTime);
+      } else {
+        // if frags are not contiguous and if we cant trust time offset, let's use first sample PTS as next audio PTS
+        nextAudioTs = inputSamples[0].pts - initTime;
+      }
+    }
+
+    // If the audio track is missing samples, the frames seem to get "left-shifted" within the
+    // resulting mp4 segment, causing sync issues and leaving gaps at the end of the audio segment.
+    // In an effort to prevent this from happening, we inject frames here where there are gaps.
+    // When possible, we inject a silent frame; when that's not possible, we duplicate the last
+    // frame.
+
+    if (track.segmentCodec === 'aac') {
+      const maxAudioFramesDrift = this.config.maxAudioFramesDrift;
+      for (let i = 0, nextPts = nextAudioTs + initTime; i < inputSamples.length; i++) {
+        // First, let's see how far off this frame is from where we expect it to be
+        const sample = inputSamples[i];
+        const pts = sample.pts;
+        const delta = pts - nextPts;
+        const duration = Math.abs(1000 * delta / inputTimeScale);
+
+        // When remuxing with video, if we're overlapping by more than a duration, drop this sample to stay in sync
+        if (delta <= -maxAudioFramesDrift * inputSampleDuration && alignedWithVideo) {
+          if (i === 0) {
+            this.warn(`Audio frame @ ${(pts / inputTimeScale).toFixed(3)}s overlaps marker by ${Math.round(1000 * delta / inputTimeScale)} ms.`);
+            this.nextAudioTs = nextAudioTs = pts - initTime;
+            nextPts = pts;
+          }
+        } // eslint-disable-line brace-style
+
+        // Insert missing frames if:
+        // 1: We're more than maxAudioFramesDrift frame away
+        // 2: Not more than MAX_SILENT_FRAME_DURATION away
+        // 3: currentTime (aka nextPtsNorm) is not 0
+        // 4: remuxing with video (videoTimeOffset !== undefined)
+        else if (delta >= maxAudioFramesDrift * inputSampleDuration && duration < MAX_SILENT_FRAME_DURATION && alignedWithVideo) {
+          let missing = Math.round(delta / inputSampleDuration);
+          // Adjust nextPts so that silent samples are aligned with media pts. This will prevent media samples from
+          // later being shifted if nextPts is based on timeOffset and delta is not a multiple of inputSampleDuration.
+          nextPts = pts - missing * inputSampleDuration;
+          while (nextPts < 0 && missing && inputSampleDuration) {
+            missing--;
+            nextPts += inputSampleDuration;
+          }
+          if (i === 0) {
+            this.nextAudioTs = nextAudioTs = nextPts - initTime;
+          }
+          this.warn(`Injecting ${missing} audio frames @ ${((nextPts - initTime) / inputTimeScale).toFixed(3)}s due to ${Math.round(1000 * delta / inputTimeScale)} ms gap.`);
+          for (let j = 0; j < missing; j++) {
+            let fillFrame = AAC.getSilentFrame(track.parsedCodec || track.manifestCodec || track.codec, track.channelCount);
+            if (!fillFrame) {
+              this.log('Unable to get silent frame for given audio codec; duplicating last frame instead.');
+              fillFrame = sample.unit.subarray();
+            }
+            inputSamples.splice(i, 0, {
+              unit: fillFrame,
+              pts: nextPts
+            });
+            nextPts += inputSampleDuration;
+            i++;
+          }
+        }
+        sample.pts = nextPts;
+        nextPts += inputSampleDuration;
+      }
+    }
+    let firstPTS = null;
+    let lastPTS = null;
+    let mdat;
+    let mdatSize = 0;
+    let sampleLength = inputSamples.length;
+    while (sampleLength--) {
+      mdatSize += inputSamples[sampleLength].unit.byteLength;
+    }
+    for (let j = 0, _nbSamples = inputSamples.length; j < _nbSamples; j++) {
+      const audioSample = inputSamples[j];
+      const unit = audioSample.unit;
+      let pts = audioSample.pts;
+      if (lastPTS !== null) {
+        // If we have more than one sample, set the duration of the sample to the "real" duration; the PTS diff with
+        // the previous sample
+        const prevSample = outputSamples[j - 1];
+        prevSample.duration = Math.round((pts - lastPTS) / scaleFactor);
+      } else {
+        if (contiguous && track.segmentCodec === 'aac') {
+          // set PTS/DTS to expected PTS/DTS
+          pts = nextAudioTs + initTime;
+        }
+        // remember first PTS of our audioSamples
+        firstPTS = pts;
+        if (mdatSize > 0) {
+          /* concatenate the audio data and construct the mdat in place
+            (need 8 more bytes to fill length and mdat type) */
+          mdatSize += offset;
+          try {
+            mdat = new Uint8Array(mdatSize);
+          } catch (err) {
+            this.observer.emit(Events.ERROR, Events.ERROR, {
+              type: ErrorTypes.MUX_ERROR,
+              details: ErrorDetails.REMUX_ALLOC_ERROR,
+              fatal: false,
+              error: err,
+              bytes: mdatSize,
+              reason: `fail allocating audio mdat ${mdatSize}`
+            });
+            return;
+          }
+          if (!rawMPEG) {
+            const view = new DataView(mdat.buffer);
+            view.setUint32(0, mdatSize);
+            mdat.set(MP4.types.mdat, 4);
+          }
+        } else {
+          // no audio samples
+          return;
+        }
+      }
+      mdat.set(unit, offset);
+      const unitLen = unit.byteLength;
+      offset += unitLen;
+      // Default the sample's duration to the computed mp4SampleDuration, which will either be 1024 for AAC or 1152 for MPEG
+      // In the case that we have 1 sample, this will be the duration. If we have more than one sample, the duration
+      // becomes the PTS diff with the previous sample
+      outputSamples.push(createMp4Sample(true, mp4SampleDuration, unitLen, 0));
+      lastPTS = pts;
+    }
+
+    // We could end up with no audio samples if all input samples were overlapping with the previously remuxed ones
+    const nbSamples = outputSamples.length;
+    if (!nbSamples) {
+      return;
+    }
+
+    // The next audio sample PTS should be equal to last sample PTS + duration
+    const lastSample = outputSamples[outputSamples.length - 1];
+    nextAudioTs = lastPTS - initTime;
+    this.nextAudioTs = nextAudioTs + scaleFactor * lastSample.duration;
+
+    // Set the track samples from inputSamples to outputSamples before remuxing
+    const moof = rawMPEG ? new Uint8Array(0) : MP4.moof(track.sequenceNumber++, firstPTS / scaleFactor, _extends({}, track, {
+      samples: outputSamples
+    }));
+
+    // Clear the track samples. This also clears the samples array in the demuxer, since the reference is shared
+    track.samples = [];
+    const start = (firstPTS - initTime) / inputTimeScale;
+    const end = this.nextAudioTs / inputTimeScale;
+    const type = 'audio';
+    const audioData = {
+      data1: moof,
+      data2: mdat,
+      startPTS: start,
+      endPTS: end,
+      startDTS: start,
+      endDTS: end,
+      type,
+      hasAudio: true,
+      hasVideo: false,
+      nb: nbSamples
+    };
+    this.isAudioContiguous = true;
+    return audioData;
+  }
+}
+function normalizePts(value, reference) {
+  let offset;
+  if (reference === null) {
+    return value;
+  }
+  if (reference < value) {
+    // - 2^33
+    offset = -8589934592;
+  } else {
+    // + 2^33
+    offset = 8589934592;
+  }
+  /* PTS is 33bit (from 0 to 2^33 -1)
+    if diff between value and reference is bigger than half of the amplitude (2^32) then it means that
+    PTS looping occured. fill the gap */
+  while (Math.abs(value - reference) > 4294967296) {
+    value += offset;
+  }
+  return value;
+}
+function findKeyframeIndex(samples) {
+  for (let i = 0; i < samples.length; i++) {
+    if (samples[i].key) {
+      return i;
+    }
+  }
+  return -1;
+}
+function flushTextTrackMetadataCueSamples(track, timeOffset, initPTS, initDTS) {
+  const length = track.samples.length;
+  if (!length) {
+    return;
+  }
+  const inputTimeScale = track.inputTimeScale;
+  for (let index = 0; index < length; index++) {
+    const sample = track.samples[index];
+    // setting id3 pts, dts to relative time
+    // using this._initPTS and this._initDTS to calculate relative time
+    sample.pts = normalizePts(sample.pts - initPTS.baseTime * inputTimeScale / initPTS.timescale, timeOffset * inputTimeScale) / inputTimeScale;
+    sample.dts = normalizePts(sample.dts - initDTS.baseTime * inputTimeScale / initDTS.timescale, timeOffset * inputTimeScale) / inputTimeScale;
+  }
+  const samples = track.samples;
+  track.samples = [];
+  return {
+    samples
+  };
+}
+function flushTextTrackUserdataCueSamples(track, timeOffset, initPTS) {
+  const length = track.samples.length;
+  if (!length) {
+    return;
+  }
+  const inputTimeScale = track.inputTimeScale;
+  for (let index = 0; index < length; index++) {
+    const sample = track.samples[index];
+    // setting text pts, dts to relative time
+    // using this._initPTS and this._initDTS to calculate relative time
+    sample.pts = normalizePts(sample.pts - initPTS.baseTime * inputTimeScale / initPTS.timescale, timeOffset * inputTimeScale) / inputTimeScale;
+  }
+  track.samples.sort((a, b) => a.pts - b.pts);
+  const samples = track.samples;
+  track.samples = [];
+  return {
+    samples
+  };
+}
+
+class PassThroughRemuxer extends Logger {
+  constructor(observer, config, typeSupported, logger) {
+    super('passthrough-remuxer', logger);
+    this.emitInitSegment = false;
+    this.audioCodec = void 0;
+    this.videoCodec = void 0;
+    this.initData = void 0;
+    this.initPTS = null;
+    this.initTracks = void 0;
+    this.lastEndTime = null;
+    this.isVideoContiguous = false;
+  }
+  destroy() {}
+  resetTimeStamp(defaultInitPTS) {
+    this.lastEndTime = null;
+    const initPTS = this.initPTS;
+    if (initPTS && defaultInitPTS) {
+      if (initPTS.baseTime === defaultInitPTS.baseTime && initPTS.timescale === defaultInitPTS.timescale) {
+        return;
+      }
+    }
+    this.initPTS = defaultInitPTS;
+  }
+  resetNextTimestamp() {
+    this.isVideoContiguous = false;
+    this.lastEndTime = null;
+  }
+  resetInitSegment(initSegment, audioCodec, videoCodec, decryptdata) {
+    this.audioCodec = audioCodec;
+    this.videoCodec = videoCodec;
+    this.generateInitSegment(initSegment, decryptdata);
+    this.emitInitSegment = true;
+  }
+  generateInitSegment(initSegment, decryptdata) {
+    let {
+      audioCodec,
+      videoCodec
+    } = this;
+    if (!(initSegment != null && initSegment.byteLength)) {
+      this.initTracks = undefined;
+      this.initData = undefined;
+      return;
+    }
+    const {
+      audio,
+      video
+    } = this.initData = parseInitSegment(initSegment);
+    if (decryptdata) {
+      patchEncyptionData(initSegment, decryptdata);
+    } else {
+      const eitherTrack = audio || video;
+      if (eitherTrack != null && eitherTrack.encrypted) {
+        this.warn(`Init segment with encrypted track with has no key ("${eitherTrack.codec}")!`);
+      }
+    }
+
+    // Get codec from initSegment
+    if (audio) {
+      audioCodec = getParsedTrackCodec(audio, ElementaryStreamTypes.AUDIO, this);
+    }
+    if (video) {
+      videoCodec = getParsedTrackCodec(video, ElementaryStreamTypes.VIDEO, this);
+    }
+    const tracks = {};
+    if (audio && video) {
+      tracks.audiovideo = {
+        container: 'video/mp4',
+        codec: audioCodec + ',' + videoCodec,
+        supplemental: video.supplemental,
+        encrypted: video.encrypted,
+        initSegment,
+        id: 'main'
+      };
+    } else if (audio) {
+      tracks.audio = {
+        container: 'audio/mp4',
+        codec: audioCodec,
+        encrypted: audio.encrypted,
+        initSegment,
+        id: 'audio'
+      };
+    } else if (video) {
+      tracks.video = {
+        container: 'video/mp4',
+        codec: videoCodec,
+        supplemental: video.supplemental,
+        encrypted: video.encrypted,
+        initSegment,
+        id: 'main'
+      };
+    } else {
+      this.warn('initSegment does not contain moov or trak boxes.');
+    }
+    this.initTracks = tracks;
+  }
+  remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset) {
+    var _initData, _initData2;
+    let {
+      initPTS,
+      lastEndTime
+    } = this;
+    const result = {
+      audio: undefined,
+      video: undefined,
+      text: textTrack,
+      id3: id3Track,
+      initSegment: undefined
+    };
+
+    // If we haven't yet set a lastEndDTS, or it was reset, set it to the provided timeOffset. We want to use the
+    // lastEndDTS over timeOffset whenever possible; during progressive playback, the media source will not update
+    // the media duration (which is what timeOffset is provided as) before we need to process the next chunk.
+    if (!isFiniteNumber(lastEndTime)) {
+      lastEndTime = this.lastEndTime = timeOffset || 0;
+    }
+
+    // The binary segment data is added to the videoTrack in the mp4demuxer. We don't check to see if the data is only
+    // audio or video (or both); adding it to video was an arbitrary choice.
+    const data = videoTrack.samples;
+    if (!data.length) {
+      return result;
+    }
+    const initSegment = {
+      initPTS: undefined,
+      timescale: undefined,
+      trackId: undefined
+    };
+    let initData = this.initData;
+    if (!((_initData = initData) != null && _initData.length)) {
+      this.generateInitSegment(data);
+      initData = this.initData;
+    }
+    if (!((_initData2 = initData) != null && _initData2.length)) {
+      // We can't remux if the initSegment could not be generated
+      this.warn('Failed to generate initSegment.');
+      return result;
+    }
+    if (this.emitInitSegment) {
+      initSegment.tracks = this.initTracks;
+      this.emitInitSegment = false;
+    }
+    const trackSampleData = getSampleData(data, initData, this);
+    const audioSampleTimestamps = initData.audio ? trackSampleData[initData.audio.id] : null;
+    const videoSampleTimestamps = initData.video ? trackSampleData[initData.video.id] : null;
+    const videoStartTime = toStartEndOrDefault(videoSampleTimestamps, Infinity);
+    const audioStartTime = toStartEndOrDefault(audioSampleTimestamps, Infinity);
+    const videoEndTime = toStartEndOrDefault(videoSampleTimestamps, 0, true);
+    const audioEndTime = toStartEndOrDefault(audioSampleTimestamps, 0, true);
+    let decodeTime = timeOffset;
+    let duration = 0;
+    const syncOnAudio = audioSampleTimestamps && (!videoSampleTimestamps || !initPTS && audioStartTime < videoStartTime || initPTS && initPTS.trackId === initData.audio.id);
+    const baseOffsetSamples = syncOnAudio ? audioSampleTimestamps : videoSampleTimestamps;
+    if (baseOffsetSamples) {
+      const timescale = baseOffsetSamples.timescale;
+      const baseTime = baseOffsetSamples.start - timeOffset * timescale;
+      const trackId = syncOnAudio ? initData.audio.id : initData.video.id;
+      decodeTime = baseOffsetSamples.start / timescale;
+      duration = syncOnAudio ? audioEndTime - audioStartTime : videoEndTime - videoStartTime;
+      if ((accurateTimeOffset || !initPTS) && (isInvalidInitPts(initPTS, decodeTime, timeOffset, duration) || timescale !== initPTS.timescale)) {
+        if (initPTS) {
+          this.warn(`Timestamps at playlist time: ${accurateTimeOffset ? '' : '~'}${timeOffset} ${baseTime / timescale} != initPTS: ${initPTS.baseTime / initPTS.timescale} (${initPTS.baseTime}/${initPTS.timescale}) trackId: ${initPTS.trackId}`);
+        }
+        this.log(`Found initPTS at playlist time: ${timeOffset} offset: ${decodeTime - timeOffset} (${baseTime}/${timescale}) trackId: ${trackId}`);
+        initPTS = null;
+        initSegment.initPTS = baseTime;
+        initSegment.timescale = timescale;
+        initSegment.trackId = trackId;
+      }
+    } else {
+      this.warn(`No audio or video samples found for initPTS at playlist time: ${timeOffset}`);
+    }
+    if (!initPTS) {
+      if (!initSegment.timescale || initSegment.trackId === undefined || initSegment.initPTS === undefined) {
+        this.warn('Could not set initPTS');
+        initSegment.initPTS = decodeTime;
+        initSegment.timescale = 1;
+        initSegment.trackId = -1;
+      }
+      this.initPTS = initPTS = {
+        baseTime: initSegment.initPTS,
+        timescale: initSegment.timescale,
+        trackId: initSegment.trackId
+      };
+    } else {
+      initSegment.initPTS = initPTS.baseTime;
+      initSegment.timescale = initPTS.timescale;
+      initSegment.trackId = initPTS.trackId;
+    }
+    const startTime = decodeTime - initPTS.baseTime / initPTS.timescale;
+    const endTime = startTime + duration;
+    if (duration > 0) {
+      this.lastEndTime = endTime;
+    } else {
+      this.warn('Duration parsed from mp4 should be greater than zero');
+      this.resetNextTimestamp();
+    }
+    const hasAudio = !!initData.audio;
+    const hasVideo = !!initData.video;
+    let type = '';
+    if (hasAudio) {
+      type += 'audio';
+    }
+    if (hasVideo) {
+      type += 'video';
+    }
+    const encrypted = (initData.audio ? initData.audio.encrypted : false) || (initData.video ? initData.video.encrypted : false);
+    const track = {
+      data1: data,
+      startPTS: startTime,
+      startDTS: startTime,
+      endPTS: endTime,
+      endDTS: endTime,
+      type,
+      hasAudio,
+      hasVideo,
+      nb: 1,
+      dropped: 0,
+      encrypted
+    };
+    result.audio = hasAudio && !hasVideo ? track : undefined;
+    result.video = hasVideo ? track : undefined;
+    const videoSampleCount = videoSampleTimestamps == null ? void 0 : videoSampleTimestamps.sampleCount;
+    if (videoSampleCount) {
+      const firstKeyFrame = videoSampleTimestamps.keyFrameIndex;
+      const independent = firstKeyFrame !== -1;
+      track.nb = videoSampleCount;
+      track.dropped = firstKeyFrame === 0 || this.isVideoContiguous ? 0 : independent ? firstKeyFrame : videoSampleCount;
+      track.independent = independent;
+      track.firstKeyFrame = firstKeyFrame;
+      if (independent && videoSampleTimestamps.keyFrameStart) {
+        track.firstKeyFramePTS = (videoSampleTimestamps.keyFrameStart - initPTS.baseTime) / initPTS.timescale;
+      }
+      if (!this.isVideoContiguous) {
+        result.independent = independent;
+      }
+      this.isVideoContiguous || (this.isVideoContiguous = independent);
+      if (track.dropped) {
+        this.warn(`fmp4 does not start with IDR: firstIDR ${firstKeyFrame}/${videoSampleCount} dropped: ${track.dropped} start: ${track.firstKeyFramePTS || 'NA'}`);
+      }
+    }
+    result.initSegment = initSegment;
+    result.id3 = flushTextTrackMetadataCueSamples(id3Track, timeOffset, initPTS, initPTS);
+    if (textTrack.samples.length) {
+      result.text = flushTextTrackUserdataCueSamples(textTrack, timeOffset, initPTS);
+    }
+    return result;
+  }
+}
+function toStartEndOrDefault(trackTimes, defaultValue, end = false) {
+  return (trackTimes == null ? void 0 : trackTimes.start) !== undefined ? (trackTimes.start + (end ? trackTimes.duration : 0)) / trackTimes.timescale : defaultValue;
+}
+function isInvalidInitPts(initPTS, startDTS, timeOffset, duration) {
+  if (initPTS === null) {
+    return true;
+  }
+  // InitPTS is invalid when distance from program would be more than segment duration or a minimum of one second
+  const minDuration = Math.max(duration, 1);
+  const startTime = startDTS - initPTS.baseTime / initPTS.timescale;
+  return Math.abs(startTime - timeOffset) > minDuration;
+}
+function getParsedTrackCodec(track, type, logger) {
+  const parsedCodec = track.codec;
+  if (parsedCodec && parsedCodec.length > 4) {
+    return parsedCodec;
+  }
+  if (type === ElementaryStreamTypes.AUDIO) {
+    if (parsedCodec === 'ec-3' || parsedCodec === 'ac-3' || parsedCodec === 'alac') {
+      return parsedCodec;
+    }
+    if (parsedCodec === 'fLaC' || parsedCodec === 'Opus') {
+      // Opting not to get `preferManagedMediaSource` from player config for isSupported() check for simplicity
+      const preferManagedMediaSource = false;
+      return getCodecCompatibleName(parsedCodec, preferManagedMediaSource);
+    }
+    logger.warn(`Unhandled audio codec "${parsedCodec}" in mp4 MAP`);
+    return parsedCodec || 'mp4a';
+  }
+  // Provide defaults based on codec type
+  // This allows for some playback of some fmp4 playlists without CODECS defined in manifest
+  logger.warn(`Unhandled video codec "${parsedCodec}" in mp4 MAP`);
+  return parsedCodec || 'avc1';
+}
+
+let now;
+// performance.now() not available on WebWorker, at least on Safari Desktop
+try {
+  now = self.performance.now.bind(self.performance);
+} catch (err) {
+  now = Date.now;
+}
+const muxConfig = [{
+  demux: MP4Demuxer,
+  remux: PassThroughRemuxer
+}, {
+  demux: TSDemuxer,
+  remux: MP4Remuxer
+}, {
+  demux: AACDemuxer,
+  remux: MP4Remuxer
+}, {
+  demux: MP3Demuxer,
+  remux: MP4Remuxer
+}];
+{
+  muxConfig.splice(2, 0, {
+    demux: AC3Demuxer,
+    remux: MP4Remuxer
+  });
+}
+class Transmuxer {
+  constructor(observer, typeSupported, config, vendor, id, logger) {
+    this.asyncResult = false;
+    this.logger = void 0;
+    this.observer = void 0;
+    this.typeSupported = void 0;
+    this.config = void 0;
+    this.id = void 0;
+    this.demuxer = void 0;
+    this.remuxer = void 0;
+    this.decrypter = void 0;
+    this.probe = void 0;
+    this.decryptionPromise = null;
+    this.transmuxConfig = void 0;
+    this.currentTransmuxState = void 0;
+    this.observer = observer;
+    this.typeSupported = typeSupported;
+    this.config = config;
+    this.id = id;
+    this.logger = logger;
+  }
+  configure(transmuxConfig) {
+    this.transmuxConfig = transmuxConfig;
+    if (this.decrypter) {
+      this.decrypter.reset();
+    }
+  }
+  push(data, decryptdata, chunkMeta, state) {
+    const stats = chunkMeta.transmuxing;
+    stats.executeStart = now();
+    let uintData = new Uint8Array(data);
+    const {
+      currentTransmuxState,
+      transmuxConfig
+    } = this;
+    if (state) {
+      this.currentTransmuxState = state;
+    }
+    const {
+      contiguous,
+      discontinuity,
+      trackSwitch,
+      accurateTimeOffset,
+      timeOffset,
+      initSegmentChange
+    } = state || currentTransmuxState;
+    const {
+      audioCodec,
+      videoCodec,
+      defaultInitPts,
+      duration,
+      initSegmentData
+    } = transmuxConfig;
+    const keyData = getEncryptionType(uintData, decryptdata);
+    if (keyData && isFullSegmentEncryption(keyData.method)) {
+      const decrypter = this.getDecrypter();
+      const aesMode = getAesModeFromFullSegmentMethod(keyData.method);
+
+      // Software decryption is synchronous; webCrypto is not
+      if (decrypter.isSync()) {
+        // Software decryption is progressive. Progressive decryption may not return a result on each call. Any cached
+        // data is handled in the flush() call
+        let decryptedData = decrypter.softwareDecrypt(uintData, keyData.key.buffer, keyData.iv.buffer, aesMode);
+        // For Low-Latency HLS Parts, decrypt in place, since part parsing is expected on push progress
+        const loadingParts = chunkMeta.part > -1;
+        if (loadingParts) {
+          const _data = decrypter.flush();
+          decryptedData = _data ? _data.buffer : _data;
+        }
+        if (!decryptedData) {
+          stats.executeEnd = now();
+          return emptyResult(chunkMeta);
+        }
+        uintData = new Uint8Array(decryptedData);
+      } else {
+        this.asyncResult = true;
+        this.decryptionPromise = decrypter.webCryptoDecrypt(uintData, keyData.key.buffer, keyData.iv.buffer, aesMode).then(decryptedData => {
+          // Calling push here is important; if flush() is called while this is still resolving, this ensures that
+          // the decrypted data has been transmuxed
+          const result = this.push(decryptedData, null, chunkMeta);
+          this.decryptionPromise = null;
+          return result;
+        });
+        return this.decryptionPromise;
+      }
+    }
+    const resetMuxers = this.needsProbing(discontinuity, trackSwitch);
+    if (resetMuxers) {
+      const error = this.configureTransmuxer(uintData);
+      if (error) {
+        this.logger.warn(`[transmuxer] ${error.message}`);
+        this.observer.emit(Events.ERROR, Events.ERROR, {
+          type: ErrorTypes.MEDIA_ERROR,
+          details: ErrorDetails.FRAG_PARSING_ERROR,
+          fatal: false,
+          error,
+          reason: error.message
+        });
+        stats.executeEnd = now();
+        return emptyResult(chunkMeta);
+      }
+    }
+    if (discontinuity || trackSwitch || initSegmentChange || resetMuxers) {
+      this.resetInitSegment(initSegmentData, audioCodec, videoCodec, duration, decryptdata);
+    }
+    if (discontinuity || initSegmentChange || resetMuxers) {
+      this.resetInitialTimestamp(defaultInitPts);
+    }
+    if (!contiguous) {
+      this.resetContiguity();
+    }
+    const result = this.transmux(uintData, keyData, timeOffset, accurateTimeOffset, chunkMeta);
+    this.asyncResult = isPromise(result);
+    const currentState = this.currentTransmuxState;
+    currentState.contiguous = true;
+    currentState.discontinuity = false;
+    currentState.trackSwitch = false;
+    stats.executeEnd = now();
+    return result;
+  }
+
+  // Due to data caching, flush calls can produce more than one TransmuxerResult (hence the Array type)
+  flush(chunkMeta) {
+    const stats = chunkMeta.transmuxing;
+    stats.executeStart = now();
+    const {
+      decrypter,
+      currentTransmuxState,
+      decryptionPromise
+    } = this;
+    if (decryptionPromise) {
+      this.asyncResult = true;
+      // Upon resolution, the decryption promise calls push() and returns its TransmuxerResult up the stack. Therefore
+      // only flushing is required for async decryption
+      return decryptionPromise.then(() => {
+        return this.flush(chunkMeta);
+      });
+    }
+    const transmuxResults = [];
+    const {
+      timeOffset
+    } = currentTransmuxState;
+    if (decrypter) {
+      // The decrypter may have data cached, which needs to be demuxed. In this case we'll have two TransmuxResults
+      // This happens in the case that we receive only 1 push call for a segment (either for non-progressive downloads,
+      // or for progressive downloads with small segments)
+      const decryptedData = decrypter.flush();
+      if (decryptedData) {
+        // Push always returns a TransmuxerResult if decryptdata is null
+        transmuxResults.push(this.push(decryptedData.buffer, null, chunkMeta));
+      }
+    }
+    const {
+      demuxer,
+      remuxer
+    } = this;
+    if (!demuxer || !remuxer) {
+      // If probing failed, then Hls.js has been given content its not able to handle
+      stats.executeEnd = now();
+      const emptyResults = [emptyResult(chunkMeta)];
+      if (this.asyncResult) {
+        return Promise.resolve(emptyResults);
+      }
+      return emptyResults;
+    }
+    const demuxResultOrPromise = demuxer.flush(timeOffset);
+    if (isPromise(demuxResultOrPromise)) {
+      this.asyncResult = true;
+      // Decrypt final SAMPLE-AES samples
+      return demuxResultOrPromise.then(demuxResult => {
+        this.flushRemux(transmuxResults, demuxResult, chunkMeta);
+        return transmuxResults;
+      });
+    }
+    this.flushRemux(transmuxResults, demuxResultOrPromise, chunkMeta);
+    if (this.asyncResult) {
+      return Promise.resolve(transmuxResults);
+    }
+    return transmuxResults;
+  }
+  flushRemux(transmuxResults, demuxResult, chunkMeta) {
+    const {
+      audioTrack,
+      videoTrack,
+      id3Track,
+      textTrack
+    } = demuxResult;
+    const {
+      accurateTimeOffset,
+      timeOffset
+    } = this.currentTransmuxState;
+    this.logger.log(`[transmuxer.ts]: Flushed ${this.id} sn: ${chunkMeta.sn}${chunkMeta.part > -1 ? ' part: ' + chunkMeta.part : ''} of ${this.id === PlaylistLevelType.MAIN ? 'level' : 'track'} ${chunkMeta.level}`);
+    const remuxResult = this.remuxer.remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset, true, this.id);
+    transmuxResults.push({
+      remuxResult,
+      chunkMeta
+    });
+    chunkMeta.transmuxing.executeEnd = now();
+  }
+  resetInitialTimestamp(defaultInitPts) {
+    const {
+      demuxer,
+      remuxer
+    } = this;
+    if (!demuxer || !remuxer) {
+      return;
+    }
+    demuxer.resetTimeStamp(defaultInitPts);
+    remuxer.resetTimeStamp(defaultInitPts);
+  }
+  resetContiguity() {
+    const {
+      demuxer,
+      remuxer
+    } = this;
+    if (!demuxer || !remuxer) {
+      return;
+    }
+    demuxer.resetContiguity();
+    remuxer.resetNextTimestamp();
+  }
+  resetInitSegment(initSegmentData, audioCodec, videoCodec, trackDuration, decryptdata) {
+    const {
+      demuxer,
+      remuxer
+    } = this;
+    if (!demuxer || !remuxer) {
+      return;
+    }
+    demuxer.resetInitSegment(initSegmentData, audioCodec, videoCodec, trackDuration);
+    remuxer.resetInitSegment(initSegmentData, audioCodec, videoCodec, decryptdata);
+  }
+  destroy() {
+    if (this.demuxer) {
+      this.demuxer.destroy();
+      this.demuxer = undefined;
+    }
+    if (this.remuxer) {
+      this.remuxer.destroy();
+      this.remuxer = undefined;
+    }
+  }
+  transmux(data, keyData, timeOffset, accurateTimeOffset, chunkMeta) {
+    let result;
+    if (keyData && keyData.method === 'SAMPLE-AES') {
+      result = this.transmuxSampleAes(data, keyData, timeOffset, accurateTimeOffset, chunkMeta);
+    } else {
+      result = this.transmuxUnencrypted(data, timeOffset, accurateTimeOffset, chunkMeta);
+    }
+    return result;
+  }
+  transmuxUnencrypted(data, timeOffset, accurateTimeOffset, chunkMeta) {
+    const {
+      audioTrack,
+      videoTrack,
+      id3Track,
+      textTrack
+    } = this.demuxer.demux(data, timeOffset, false, !this.config.progressive);
+    const remuxResult = this.remuxer.remux(audioTrack, videoTrack, id3Track, textTrack, timeOffset, accurateTimeOffset, false, this.id);
+    return {
+      remuxResult,
+      chunkMeta
+    };
+  }
+  transmuxSampleAes(data, decryptData, timeOffset, accurateTimeOffset, chunkMeta) {
+    return this.demuxer.demuxSampleAes(data, decryptData, timeOffset).then(demuxResult => {
+      const remuxResult = this.remuxer.remux(demuxResult.audioTrack, demuxResult.videoTrack, demuxResult.id3Track, demuxResult.textTrack, timeOffset, accurateTimeOffset, false, this.id);
+      return {
+        remuxResult,
+        chunkMeta
+      };
+    });
+  }
+  configureTransmuxer(data) {
+    const {
+      config,
+      observer,
+      typeSupported
+    } = this;
+    // probe for content type
+    let mux;
+    for (let i = 0, len = muxConfig.length; i < len; i++) {
+      var _muxConfig$i$demux;
+      if ((_muxConfig$i$demux = muxConfig[i].demux) != null && _muxConfig$i$demux.probe(data, this.logger)) {
+        mux = muxConfig[i];
+        break;
+      }
+    }
+    if (!mux) {
+      return new Error('Failed to find demuxer by probing fragment data');
+    }
+    // so let's check that current remuxer and demuxer are still valid
+    const demuxer = this.demuxer;
+    const remuxer = this.remuxer;
+    const Remuxer = mux.remux;
+    const Demuxer = mux.demux;
+    if (!remuxer || !(remuxer instanceof Remuxer)) {
+      this.remuxer = new Remuxer(observer, config, typeSupported, this.logger);
+    }
+    if (!demuxer || !(demuxer instanceof Demuxer)) {
+      this.demuxer = new Demuxer(observer, config, typeSupported, this.logger);
+      this.probe = Demuxer.probe;
+    }
+  }
+  needsProbing(discontinuity, trackSwitch) {
+    // in case of continuity change, or track switch
+    // we might switch from content type (AAC container to TS container, or TS to fmp4 for example)
+    return !this.demuxer || !this.remuxer || discontinuity || trackSwitch;
+  }
+  getDecrypter() {
+    let decrypter = this.decrypter;
+    if (!decrypter) {
+      decrypter = this.decrypter = new Decrypter(this.config);
+    }
+    return decrypter;
+  }
+}
+function getEncryptionType(data, decryptData) {
+  let encryptionType = null;
+  if (data.byteLength > 0 && (decryptData == null ? void 0 : decryptData.key) != null && decryptData.iv !== null && decryptData.method != null) {
+    encryptionType = decryptData;
+  }
+  return encryptionType;
+}
+const emptyResult = chunkMeta => ({
+  remuxResult: {},
+  chunkMeta
+});
+function isPromise(p) {
+  return 'then' in p && p.then instanceof Function;
+}
+class TransmuxConfig {
+  constructor(audioCodec, videoCodec, initSegmentData, duration, defaultInitPts) {
+    this.audioCodec = void 0;
+    this.videoCodec = void 0;
+    this.initSegmentData = void 0;
+    this.duration = void 0;
+    this.defaultInitPts = void 0;
+    this.audioCodec = audioCodec;
+    this.videoCodec = videoCodec;
+    this.initSegmentData = initSegmentData;
+    this.duration = duration;
+    this.defaultInitPts = defaultInitPts || null;
+  }
+}
+class TransmuxState {
+  constructor(discontinuity, contiguous, accurateTimeOffset, trackSwitch, timeOffset, initSegmentChange) {
+    this.discontinuity = void 0;
+    this.contiguous = void 0;
+    this.accurateTimeOffset = void 0;
+    this.trackSwitch = void 0;
+    this.timeOffset = void 0;
+    this.initSegmentChange = void 0;
+    this.discontinuity = discontinuity;
+    this.contiguous = contiguous;
+    this.accurateTimeOffset = accurateTimeOffset;
+    this.trackSwitch = trackSwitch;
+    this.timeOffset = timeOffset;
+    this.initSegmentChange = initSegmentChange;
+  }
+}
+
+let transmuxerInstanceCount = 0;
+class TransmuxerInterface {
+  constructor(_hls, id, onTransmuxComplete, onFlush) {
+    this.error = null;
+    this.hls = void 0;
+    this.id = void 0;
+    this.instanceNo = transmuxerInstanceCount++;
+    this.observer = void 0;
+    this.frag = null;
+    this.part = null;
+    this.useWorker = void 0;
+    this.workerContext = null;
+    this.transmuxer = null;
+    this.onTransmuxComplete = void 0;
+    this.onFlush = void 0;
+    this.onWorkerMessage = event => {
+      const data = event.data;
+      const hls = this.hls;
+      if (!hls || !(data != null && data.event) || data.instanceNo !== this.instanceNo) {
+        return;
+      }
+      switch (data.event) {
+        case 'init':
+          {
+            var _this$workerContext;
+            const objectURL = (_this$workerContext = this.workerContext) == null ? void 0 : _this$workerContext.objectURL;
+            if (objectURL) {
+              // revoke the Object URL that was used to create transmuxer worker, so as not to leak it
+              self.URL.revokeObjectURL(objectURL);
+            }
+            break;
+          }
+        case 'transmuxComplete':
+          {
+            this.handleTransmuxComplete(data.data);
+            break;
+          }
+        case 'flush':
+          {
+            this.onFlush(data.data);
+            break;
+          }
+
+        // pass logs from the worker thread to the main logger
+        case 'workerLog':
+          {
+            if (hls.logger[data.data.logType]) {
+              hls.logger[data.data.logType](data.data.message);
+            }
+            break;
+          }
+        default:
+          {
+            data.data = data.data || {};
+            data.data.frag = this.frag;
+            data.data.part = this.part;
+            data.data.id = this.id;
+            hls.trigger(data.event, data.data);
+            break;
+          }
+      }
+    };
+    this.onWorkerError = event => {
+      if (!this.hls) {
+        return;
+      }
+      const error = new Error(`${event.message}  (${event.filename}:${event.lineno})`);
+      this.hls.config.enableWorker = false;
+      this.hls.logger.warn(`Error in "${this.id}" Web Worker, fallback to inline`);
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.INTERNAL_EXCEPTION,
+        fatal: false,
+        event: 'demuxerWorker',
+        error
+      });
+    };
+    const config = _hls.config;
+    this.hls = _hls;
+    this.id = id;
+    this.useWorker = !!config.enableWorker;
+    this.onTransmuxComplete = onTransmuxComplete;
+    this.onFlush = onFlush;
+    const forwardMessage = (ev, data) => {
+      data = data || {};
+      data.frag = this.frag || undefined;
+      if (ev === Events.ERROR) {
+        data = data;
+        data.parent = this.id;
+        data.part = this.part;
+        this.error = data.error;
+      }
+      this.hls.trigger(ev, data);
+    };
+
+    // forward events to main thread
+    this.observer = new EventEmitter();
+    this.observer.on(Events.FRAG_DECRYPTED, forwardMessage);
+    this.observer.on(Events.ERROR, forwardMessage);
+    const m2tsTypeSupported = getM2TSSupportedAudioTypes(config.preferManagedMediaSource);
+    if (this.useWorker && typeof Worker !== 'undefined') {
+      const logger = this.hls.logger;
+      const canCreateWorker = config.workerPath || hasUMDWorker();
+      if (canCreateWorker) {
+        try {
+          if (config.workerPath) {
+            logger.log(`loading Web Worker ${config.workerPath} for "${id}"`);
+            this.workerContext = loadWorker(config.workerPath);
+          } else {
+            logger.log(`injecting Web Worker for "${id}"`);
+            this.workerContext = injectWorker();
+          }
+          const {
+            worker
+          } = this.workerContext;
+          worker.addEventListener('message', this.onWorkerMessage);
+          worker.addEventListener('error', this.onWorkerError);
+          worker.postMessage({
+            instanceNo: this.instanceNo,
+            cmd: 'init',
+            typeSupported: m2tsTypeSupported,
+            id,
+            config: stringify(config)
+          });
+        } catch (err) {
+          logger.warn(`Error setting up "${id}" Web Worker, fallback to inline`, err);
+          this.terminateWorker();
+          this.error = null;
+          this.transmuxer = new Transmuxer(this.observer, m2tsTypeSupported, config, '', id, _hls.logger);
+        }
+        return;
+      }
+    }
+    this.transmuxer = new Transmuxer(this.observer, m2tsTypeSupported, config, '', id, _hls.logger);
+  }
+  reset() {
+    this.frag = null;
+    this.part = null;
+    if (this.workerContext) {
+      const instanceNo = this.instanceNo;
+      this.instanceNo = transmuxerInstanceCount++;
+      const config = this.hls.config;
+      const m2tsTypeSupported = getM2TSSupportedAudioTypes(config.preferManagedMediaSource);
+      this.workerContext.worker.postMessage({
+        instanceNo: this.instanceNo,
+        cmd: 'reset',
+        resetNo: instanceNo,
+        typeSupported: m2tsTypeSupported,
+        id: this.id,
+        config: stringify(config)
+      });
+    }
+  }
+  terminateWorker() {
+    if (this.workerContext) {
+      const {
+        worker
+      } = this.workerContext;
+      this.workerContext = null;
+      worker.removeEventListener('message', this.onWorkerMessage);
+      worker.removeEventListener('error', this.onWorkerError);
+      removeWorkerFromStore(this.hls.config.workerPath);
+    }
+  }
+  destroy() {
+    if (this.workerContext) {
+      this.terminateWorker();
+      // @ts-ignore
+      this.onWorkerMessage = this.onWorkerError = null;
+    } else {
+      const transmuxer = this.transmuxer;
+      if (transmuxer) {
+        transmuxer.destroy();
+        this.transmuxer = null;
+      }
+    }
+    const observer = this.observer;
+    if (observer) {
+      observer.removeAllListeners();
+    }
+    this.frag = null;
+    this.part = null;
+    // @ts-ignore
+    this.observer = null;
+    // @ts-ignore
+    this.hls = null;
+  }
+  push(data, initSegmentData, audioCodec, videoCodec, frag, part, duration, accurateTimeOffset, chunkMeta, defaultInitPTS) {
+    var _frag$initSegment, _lastFrag$initSegment;
+    chunkMeta.transmuxing.start = self.performance.now();
+    const {
+      instanceNo,
+      transmuxer
+    } = this;
+    const timeOffset = part ? part.start : frag.start;
+    // TODO: push "clear-lead" decrypt data for unencrypted fragments in streams with encrypted ones
+    const decryptdata = frag.decryptdata;
+    const lastFrag = this.frag;
+    const discontinuity = !(lastFrag && frag.cc === lastFrag.cc);
+    const trackSwitch = !(lastFrag && chunkMeta.level === lastFrag.level);
+    const snDiff = lastFrag ? chunkMeta.sn - lastFrag.sn : -1;
+    const partDiff = this.part ? chunkMeta.part - this.part.index : -1;
+    const progressive = snDiff === 0 && chunkMeta.id > 1 && chunkMeta.id === (lastFrag == null ? void 0 : lastFrag.stats.chunkCount);
+    const contiguous = !trackSwitch && (snDiff === 1 || snDiff === 0 && (partDiff === 1 || progressive && partDiff <= 0));
+    const now = self.performance.now();
+    if (trackSwitch || snDiff || frag.stats.parsing.start === 0) {
+      frag.stats.parsing.start = now;
+    }
+    if (part && (partDiff || !contiguous)) {
+      part.stats.parsing.start = now;
+    }
+    const initSegmentChange = !(lastFrag && ((_frag$initSegment = frag.initSegment) == null ? void 0 : _frag$initSegment.url) === ((_lastFrag$initSegment = lastFrag.initSegment) == null ? void 0 : _lastFrag$initSegment.url));
+    const state = new TransmuxState(discontinuity, contiguous, accurateTimeOffset, trackSwitch, timeOffset, initSegmentChange);
+    if (!contiguous || discontinuity || initSegmentChange) {
+      this.hls.logger.log(`[transmuxer-interface]: Starting new transmux session for ${frag.type} sn: ${chunkMeta.sn}${chunkMeta.part > -1 ? ' part: ' + chunkMeta.part : ''} ${this.id === PlaylistLevelType.MAIN ? 'level' : 'track'}: ${chunkMeta.level} id: ${chunkMeta.id}
+        discontinuity: ${discontinuity}
+        trackSwitch: ${trackSwitch}
+        contiguous: ${contiguous}
+        accurateTimeOffset: ${accurateTimeOffset}
+        timeOffset: ${timeOffset}
+        initSegmentChange: ${initSegmentChange}`);
+      const config = new TransmuxConfig(audioCodec, videoCodec, initSegmentData, duration, defaultInitPTS);
+      this.configureTransmuxer(config);
+    }
+    this.frag = frag;
+    this.part = part;
+
+    // Frags with sn of 'initSegment' are not transmuxed
+    if (this.workerContext) {
+      // post fragment payload as transferable objects for ArrayBuffer (no copy)
+      this.workerContext.worker.postMessage({
+        instanceNo,
+        cmd: 'demux',
+        data,
+        decryptdata,
+        chunkMeta,
+        state
+      }, data instanceof ArrayBuffer ? [data] : []);
+    } else if (transmuxer) {
+      const transmuxResult = transmuxer.push(data, decryptdata, chunkMeta, state);
+      if (isPromise(transmuxResult)) {
+        transmuxResult.then(data => {
+          this.handleTransmuxComplete(data);
+        }).catch(error => {
+          this.transmuxerError(error, chunkMeta, 'transmuxer-interface push error');
+        });
+      } else {
+        this.handleTransmuxComplete(transmuxResult);
+      }
+    }
+  }
+  flush(chunkMeta) {
+    chunkMeta.transmuxing.start = self.performance.now();
+    const {
+      instanceNo,
+      transmuxer
+    } = this;
+    if (this.workerContext) {
+      this.workerContext.worker.postMessage({
+        instanceNo,
+        cmd: 'flush',
+        chunkMeta
+      });
+    } else if (transmuxer) {
+      const transmuxResult = transmuxer.flush(chunkMeta);
+      if (isPromise(transmuxResult)) {
+        transmuxResult.then(data => {
+          this.handleFlushResult(data, chunkMeta);
+        }).catch(error => {
+          this.transmuxerError(error, chunkMeta, 'transmuxer-interface flush error');
+        });
+      } else {
+        this.handleFlushResult(transmuxResult, chunkMeta);
+      }
+    }
+  }
+  transmuxerError(error, chunkMeta, reason) {
+    if (!this.hls) {
+      return;
+    }
+    this.error = error;
+    this.hls.trigger(Events.ERROR, {
+      type: ErrorTypes.MEDIA_ERROR,
+      details: ErrorDetails.FRAG_PARSING_ERROR,
+      chunkMeta,
+      frag: this.frag || undefined,
+      part: this.part || undefined,
+      fatal: false,
+      error,
+      err: error,
+      reason
+    });
+  }
+  handleFlushResult(results, chunkMeta) {
+    results.forEach(result => {
+      this.handleTransmuxComplete(result);
+    });
+    this.onFlush(chunkMeta);
+  }
+  configureTransmuxer(config) {
+    const {
+      instanceNo,
+      transmuxer
+    } = this;
+    if (this.workerContext) {
+      this.workerContext.worker.postMessage({
+        instanceNo,
+        cmd: 'configure',
+        config
+      });
+    } else if (transmuxer) {
+      transmuxer.configure(config);
+    }
+  }
+  handleTransmuxComplete(result) {
+    result.chunkMeta.transmuxing.end = self.performance.now();
+    this.onTransmuxComplete(result);
+  }
+}
+
+const TICK_INTERVAL$3 = 100; // how often to tick in ms
+
+class AudioStreamController extends BaseStreamController {
+  constructor(hls, fragmentTracker, keyLoader) {
+    super(hls, fragmentTracker, keyLoader, 'audio-stream-controller', PlaylistLevelType.AUDIO);
+    this.mainAnchor = null;
+    this.mainFragLoading = null;
+    this.audioOnly = false;
+    this.bufferedTrack = null;
+    this.switchingTrack = null;
+    this.trackId = -1;
+    this.waitingData = null;
+    this.mainDetails = null;
+    this.flushing = false;
+    this.bufferFlushed = false;
+    this.cachedTrackLoadedData = null;
+    this.registerListeners();
+  }
+  onHandlerDestroying() {
+    this.unregisterListeners();
+    super.onHandlerDestroying();
+    this.resetItem();
+  }
+  resetItem() {
+    this.mainDetails = this.mainAnchor = this.mainFragLoading = this.bufferedTrack = this.switchingTrack = this.waitingData = this.cachedTrackLoadedData = null;
+  }
+  registerListeners() {
+    super.registerListeners();
+    const {
+      hls
+    } = this;
+    hls.on(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.on(Events.AUDIO_TRACKS_UPDATED, this.onAudioTracksUpdated, this);
+    hls.on(Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
+    hls.on(Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
+    hls.on(Events.BUFFER_RESET, this.onBufferReset, this);
+    hls.on(Events.BUFFER_CREATED, this.onBufferCreated, this);
+    hls.on(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+    hls.on(Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
+    hls.on(Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
+    hls.on(Events.FRAG_LOADING, this.onFragLoading, this);
+    hls.on(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    if (!hls) {
+      return;
+    }
+    super.unregisterListeners();
+    hls.off(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.off(Events.AUDIO_TRACKS_UPDATED, this.onAudioTracksUpdated, this);
+    hls.off(Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
+    hls.off(Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
+    hls.off(Events.BUFFER_RESET, this.onBufferReset, this);
+    hls.off(Events.BUFFER_CREATED, this.onBufferCreated, this);
+    hls.off(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+    hls.off(Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
+    hls.off(Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
+    hls.off(Events.FRAG_LOADING, this.onFragLoading, this);
+    hls.off(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+  }
+
+  // INIT_PTS_FOUND is triggered when the video track parsed in the stream-controller has a new PTS value
+  onInitPtsFound(event, {
+    frag,
+    id,
+    initPTS,
+    timescale,
+    trackId
+  }) {
+    // Always update the new INIT PTS
+    // Can change due level switch
+    if (id === PlaylistLevelType.MAIN) {
+      const cc = frag.cc;
+      const inFlightFrag = this.fragCurrent;
+      this.initPTS[cc] = {
+        baseTime: initPTS,
+        timescale,
+        trackId
+      };
+      this.log(`InitPTS for cc: ${cc} found from main: ${initPTS / timescale} (${initPTS}/${timescale}) trackId: ${trackId}`);
+      this.mainAnchor = frag;
+      // If we are waiting, tick immediately to unblock audio fragment transmuxing
+      if (this.state === State.WAITING_INIT_PTS) {
+        const waitingData = this.waitingData;
+        if (!waitingData && !this.loadingParts || waitingData && waitingData.frag.cc !== cc) {
+          this.syncWithAnchor(frag, waitingData == null ? void 0 : waitingData.frag);
+        }
+      } else if (!this.hls.hasEnoughToStart && inFlightFrag && inFlightFrag.cc !== cc) {
+        inFlightFrag.abortRequests();
+        this.syncWithAnchor(frag, inFlightFrag);
+      } else if (this.state === State.IDLE) {
+        this.tick();
+      }
+    }
+  }
+  getLoadPosition() {
+    if (!this.startFragRequested && this.nextLoadPosition >= 0) {
+      return this.nextLoadPosition;
+    }
+    return super.getLoadPosition();
+  }
+  syncWithAnchor(mainAnchor, waitingToAppend) {
+    var _this$mainFragLoading;
+    // Drop waiting fragment if videoTrackCC has changed since waitingFragment was set and initPTS was not found
+    const mainFragLoading = ((_this$mainFragLoading = this.mainFragLoading) == null ? void 0 : _this$mainFragLoading.frag) || null;
+    if (waitingToAppend) {
+      if ((mainFragLoading == null ? void 0 : mainFragLoading.cc) === waitingToAppend.cc) {
+        // Wait for loading frag to complete and INIT_PTS_FOUND
+        return;
+      }
+    }
+    const targetDiscontinuity = (mainFragLoading || mainAnchor).cc;
+    const trackDetails = this.getLevelDetails();
+    const pos = this.getLoadPosition();
+    const syncFrag = findNearestWithCC(trackDetails, targetDiscontinuity, pos);
+    // Only stop waiting for audioFrag.cc if an audio segment of the same discontinuity domain (cc) is found
+    if (syncFrag) {
+      this.log(`Syncing with main frag at ${syncFrag.start} cc ${syncFrag.cc}`);
+      this.startFragRequested = false;
+      this.nextLoadPosition = syncFrag.start;
+      this.resetLoadingState();
+      if (this.state === State.IDLE) {
+        this.doTickIdle();
+      }
+    }
+  }
+  startLoad(startPosition, skipSeekToStartPosition) {
+    if (!this.levels) {
+      this.startPosition = startPosition;
+      this.state = State.STOPPED;
+      return;
+    }
+    const lastCurrentTime = this.lastCurrentTime;
+    this.stopLoad();
+    this.setInterval(TICK_INTERVAL$3);
+    if (lastCurrentTime > 0 && startPosition === -1) {
+      this.log(`Override startPosition with lastCurrentTime @${lastCurrentTime.toFixed(3)}`);
+      startPosition = lastCurrentTime;
+      this.state = State.IDLE;
+    } else {
+      this.state = State.WAITING_TRACK;
+    }
+    this.nextLoadPosition = this.lastCurrentTime = startPosition + this.timelineOffset;
+    this.startPosition = skipSeekToStartPosition ? -1 : startPosition;
+    this.tick();
+  }
+  doTick() {
+    switch (this.state) {
+      case State.IDLE:
+        this.doTickIdle();
+        break;
+      case State.WAITING_TRACK:
+        {
+          const {
+            levels,
+            trackId
+          } = this;
+          const currenTrack = levels == null ? void 0 : levels[trackId];
+          const details = currenTrack == null ? void 0 : currenTrack.details;
+          if (details && !this.waitForLive(currenTrack)) {
+            if (this.waitForCdnTuneIn(details)) {
+              break;
+            }
+            this.state = State.WAITING_INIT_PTS;
+          }
+          break;
+        }
+      case State.FRAG_LOADING_WAITING_RETRY:
+        {
+          this.checkRetryDate();
+          break;
+        }
+      case State.WAITING_INIT_PTS:
+        {
+          // Ensure we don't get stuck in the WAITING_INIT_PTS state if the waiting frag CC doesn't match any initPTS
+          const waitingData = this.waitingData;
+          if (waitingData) {
+            const {
+              frag,
+              part,
+              cache,
+              complete
+            } = waitingData;
+            const mainAnchor = this.mainAnchor;
+            if (this.initPTS[frag.cc] !== undefined) {
+              this.waitingData = null;
+              this.state = State.FRAG_LOADING;
+              const payload = cache.flush().buffer;
+              const data = {
+                frag,
+                part,
+                payload,
+                networkDetails: null
+              };
+              this._handleFragmentLoadProgress(data);
+              if (complete) {
+                super._handleFragmentLoadComplete(data);
+              }
+            } else if (mainAnchor && mainAnchor.cc !== waitingData.frag.cc) {
+              this.syncWithAnchor(mainAnchor, waitingData.frag);
+            }
+          } else {
+            this.state = State.IDLE;
+          }
+        }
+    }
+    this.onTickEnd();
+  }
+  resetLoadingState() {
+    const waitingData = this.waitingData;
+    if (waitingData) {
+      this.fragmentTracker.removeFragment(waitingData.frag);
+      this.waitingData = null;
+    }
+    super.resetLoadingState();
+  }
+  onTickEnd() {
+    const {
+      media
+    } = this;
+    if (!(media != null && media.readyState)) {
+      // Exit early if we don't have media or if the media hasn't buffered anything yet (readyState 0)
+      return;
+    }
+    this.lastCurrentTime = media.currentTime;
+  }
+  doTickIdle() {
+    var _this$mainFragLoading2;
+    const {
+      hls,
+      levels,
+      media,
+      trackId
+    } = this;
+    const config = hls.config;
+
+    // 1. if buffering is suspended
+    // 2. if video not attached AND
+    //    start fragment already requested OR start frag prefetch not enabled
+    // 3. if tracks or track not loaded and selected
+    // then exit loop
+    // => if media not attached but start frag prefetch is enabled and start frag not requested yet, we will not exit loop
+    if (!this.buffering || !media && !this.primaryPrefetch && (this.startFragRequested || !config.startFragPrefetch) || !(levels != null && levels[trackId])) {
+      return;
+    }
+    const levelInfo = levels[trackId];
+    const trackDetails = levelInfo.details;
+    if (!trackDetails || this.waitForLive(levelInfo) || this.waitForCdnTuneIn(trackDetails)) {
+      this.state = State.WAITING_TRACK;
+      this.startFragRequested = false;
+      return;
+    }
+    const bufferable = this.mediaBuffer ? this.mediaBuffer : this.media;
+    if (this.bufferFlushed && bufferable) {
+      this.bufferFlushed = false;
+      this.afterBufferFlushed(bufferable, ElementaryStreamTypes.AUDIO, PlaylistLevelType.AUDIO);
+    }
+    const bufferInfo = this.getFwdBufferInfo(bufferable, PlaylistLevelType.AUDIO);
+    if (bufferInfo === null) {
+      return;
+    }
+    if (!this.switchingTrack && this._streamEnded(bufferInfo, trackDetails)) {
+      hls.trigger(Events.BUFFER_EOS, {
+        type: 'audio'
+      });
+      this.state = State.ENDED;
+      return;
+    }
+    const bufferLen = bufferInfo.len;
+    const maxBufLen = hls.maxBufferLength;
+    const fragments = trackDetails.fragments;
+    const start = fragments[0].start;
+    const loadPosition = this.getLoadPosition();
+    const targetBufferTime = this.flushing ? loadPosition : bufferInfo.end;
+    if (this.switchingTrack && media) {
+      const pos = loadPosition;
+      // if currentTime (pos) is less than alt audio playlist start time, it means that alt audio is ahead of currentTime
+      if (trackDetails.PTSKnown && pos < start) {
+        // if everything is buffered from pos to start or if audio buffer upfront, let's seek to start
+        if (bufferInfo.end > start || bufferInfo.nextStart) {
+          this.log('Alt audio track ahead of main track, seek to start of alt audio track');
+          media.currentTime = start + 0.05;
+        }
+      }
+    }
+
+    // if buffer length is less than maxBufLen, or near the end, find a fragment to load
+    if (bufferLen >= maxBufLen && !this.switchingTrack && targetBufferTime < fragments[fragments.length - 1].start) {
+      return;
+    }
+    let frag = this.getNextFragment(targetBufferTime, trackDetails);
+    // Avoid loop loading by using nextLoadPosition set for backtracking and skipping consecutive GAP tags
+    if (frag && this.isLoopLoading(frag, targetBufferTime)) {
+      frag = this.getNextFragmentLoopLoading(frag, trackDetails, bufferInfo, PlaylistLevelType.MAIN, maxBufLen);
+    }
+    if (!frag) {
+      this.bufferFlushed = true;
+      return;
+    }
+    if (this.exceedsMaxBuffer(bufferInfo, maxBufLen, frag)) {
+      return;
+    }
+
+    // Request audio segments up to one fragment ahead of main stream-controller
+    let mainFragLoading = ((_this$mainFragLoading2 = this.mainFragLoading) == null ? void 0 : _this$mainFragLoading2.frag) || null;
+    if (!this.audioOnly && this.startFragRequested && mainFragLoading && isMediaFragment(frag) && !frag.endList && (!trackDetails.live || !this.loadingParts && targetBufferTime < this.hls.liveSyncPosition)) {
+      if (this.fragmentTracker.getState(mainFragLoading) === FragmentState.OK) {
+        this.mainFragLoading = mainFragLoading = null;
+      }
+      if (mainFragLoading && isMediaFragment(mainFragLoading)) {
+        if (frag.start > mainFragLoading.end) {
+          // Get buffered frag at target position from tracker (loaded out of sequence)
+          const mainFragAtPos = this.fragmentTracker.getFragAtPos(targetBufferTime, PlaylistLevelType.MAIN);
+          if (mainFragAtPos && mainFragAtPos.end > mainFragLoading.end) {
+            mainFragLoading = mainFragAtPos;
+            this.mainFragLoading = {
+              frag: mainFragAtPos,
+              targetBufferTime: null
+            };
+          }
+        }
+        const atBufferSyncLimit = frag.start > mainFragLoading.end;
+        if (atBufferSyncLimit) {
+          return;
+        }
+      }
+    }
+    this.loadFragment(frag, levelInfo, targetBufferTime);
+  }
+  onMediaDetaching(event, data) {
+    this.bufferFlushed = this.flushing = false;
+    super.onMediaDetaching(event, data);
+  }
+  onAudioTracksUpdated(event, {
+    audioTracks
+  }) {
+    // Reset tranxmuxer is essential for large context switches (Content Steering)
+    this.resetTransmuxer();
+    this.levels = audioTracks.map(mediaPlaylist => new Level(mediaPlaylist));
+  }
+  onAudioTrackSwitching(event, data) {
+    // if any URL found on new audio track, it is an alternate audio track
+    const altAudio = !!data.url;
+    this.trackId = data.id;
+    const {
+      fragCurrent
+    } = this;
+    if (fragCurrent) {
+      fragCurrent.abortRequests();
+      this.removeUnbufferedFrags(fragCurrent.start);
+    }
+    this.resetLoadingState();
+
+    // should we switch tracks ?
+    if (altAudio) {
+      this.switchingTrack = data;
+      // main audio track are handled by stream-controller, just do something if switching to alt audio track
+      this.flushAudioIfNeeded(data);
+      if (this.state !== State.STOPPED) {
+        // switching to audio track, start timer if not already started
+        this.setInterval(TICK_INTERVAL$3);
+        this.state = State.IDLE;
+        this.tick();
+      }
+    } else {
+      // destroy useless transmuxer when switching audio to main
+      this.resetTransmuxer();
+      this.switchingTrack = null;
+      this.bufferedTrack = data;
+      this.clearInterval();
+    }
+  }
+  onManifestLoading() {
+    super.onManifestLoading();
+    this.bufferFlushed = this.flushing = this.audioOnly = false;
+    this.resetItem();
+    this.trackId = -1;
+  }
+  onLevelLoaded(event, data) {
+    this.mainDetails = data.details;
+    const cachedTrackLoadedData = this.cachedTrackLoadedData;
+    if (cachedTrackLoadedData) {
+      this.cachedTrackLoadedData = null;
+      this.onAudioTrackLoaded(Events.AUDIO_TRACK_LOADED, cachedTrackLoadedData);
+    }
+  }
+  onAudioTrackLoaded(event, data) {
+    var _trackLevel$details;
+    const {
+      levels
+    } = this;
+    const {
+      details: newDetails,
+      id: trackId,
+      groupId,
+      track
+    } = data;
+    if (!levels) {
+      this.warn(`Audio tracks reset while loading track ${trackId} "${track.name}" of "${groupId}"`);
+      return;
+    }
+    const mainDetails = this.mainDetails;
+    if (!mainDetails || newDetails.endCC > mainDetails.endCC || mainDetails.expired) {
+      this.cachedTrackLoadedData = data;
+      if (this.state !== State.STOPPED) {
+        this.state = State.WAITING_TRACK;
+      }
+      return;
+    }
+    this.cachedTrackLoadedData = null;
+    this.log(`Audio track ${trackId} "${track.name}" of "${groupId}" loaded [${newDetails.startSN},${newDetails.endSN}]${newDetails.lastPartSn ? `[part-${newDetails.lastPartSn}-${newDetails.lastPartIndex}]` : ''},duration:${newDetails.totalduration}`);
+    const trackLevel = levels[trackId];
+    let sliding = 0;
+    if (newDetails.live || (_trackLevel$details = trackLevel.details) != null && _trackLevel$details.live) {
+      this.checkLiveUpdate(newDetails);
+      if (newDetails.deltaUpdateFailed) {
+        return;
+      }
+      if (trackLevel.details) {
+        var _this$levelLastLoaded;
+        sliding = this.alignPlaylists(newDetails, trackLevel.details, (_this$levelLastLoaded = this.levelLastLoaded) == null ? void 0 : _this$levelLastLoaded.details);
+      }
+      if (!newDetails.alignedSliding) {
+        // Align audio rendition with the "main" playlist on discontinuity change
+        // or program-date-time (PDT)
+        alignDiscontinuities(newDetails, mainDetails);
+        if (!newDetails.alignedSliding) {
+          alignMediaPlaylistByPDT(newDetails, mainDetails);
+        }
+        sliding = newDetails.fragmentStart;
+      }
+    }
+    trackLevel.details = newDetails;
+    this.levelLastLoaded = trackLevel;
+
+    // compute start position if we are aligned with the main playlist
+    if (!this.startFragRequested) {
+      this.setStartPosition(mainDetails, sliding);
+    }
+    this.hls.trigger(Events.AUDIO_TRACK_UPDATED, {
+      details: newDetails,
+      id: trackId,
+      groupId: data.groupId
+    });
+
+    // only switch back to IDLE state if we were waiting for track to start downloading a new fragment
+    if (this.state === State.WAITING_TRACK && !this.waitForCdnTuneIn(newDetails)) {
+      this.state = State.IDLE;
+    }
+
+    // trigger handler right now
+    this.tick();
+  }
+  _handleFragmentLoadProgress(data) {
+    var _frag$initSegment;
+    const frag = data.frag;
+    const {
+      part,
+      payload
+    } = data;
+    const {
+      config,
+      trackId,
+      levels
+    } = this;
+    if (!levels) {
+      this.warn(`Audio tracks were reset while fragment load was in progress. Fragment ${frag.sn} of level ${frag.level} will not be buffered`);
+      return;
+    }
+    const track = levels[trackId];
+    if (!track) {
+      this.warn('Audio track is undefined on fragment load progress');
+      return;
+    }
+    const details = track.details;
+    if (!details) {
+      this.warn('Audio track details undefined on fragment load progress');
+      this.removeUnbufferedFrags(frag.start);
+      return;
+    }
+    const audioCodec = config.defaultAudioCodec || track.audioCodec || 'mp4a.40.2';
+    let transmuxer = this.transmuxer;
+    if (!transmuxer) {
+      transmuxer = this.transmuxer = new TransmuxerInterface(this.hls, PlaylistLevelType.AUDIO, this._handleTransmuxComplete.bind(this), this._handleTransmuxerFlush.bind(this));
+    }
+
+    // Check if we have video initPTS
+    // If not we need to wait for it
+    const initPTS = this.initPTS[frag.cc];
+    const initSegmentData = (_frag$initSegment = frag.initSegment) == null ? void 0 : _frag$initSegment.data;
+    if (initPTS !== undefined) {
+      // this.log(`Transmuxing ${sn} of [${details.startSN} ,${details.endSN}],track ${trackId}`);
+      // time Offset is accurate if level PTS is known, or if playlist is not sliding (not live)
+      const accurateTimeOffset = false; // details.PTSKnown || !details.live;
+      const partIndex = part ? part.index : -1;
+      const partial = partIndex !== -1;
+      const chunkMeta = new ChunkMetadata(frag.level, frag.sn, frag.stats.chunkCount, payload.byteLength, partIndex, partial);
+      transmuxer.push(payload, initSegmentData, audioCodec, '', frag, part, details.totalduration, accurateTimeOffset, chunkMeta, initPTS);
+    } else {
+      this.log(`Unknown video PTS for cc ${frag.cc}, waiting for video PTS before demuxing audio frag ${frag.sn} of [${details.startSN} ,${details.endSN}],track ${trackId}`);
+      const {
+        cache
+      } = this.waitingData = this.waitingData || {
+        frag,
+        part,
+        cache: new ChunkCache(),
+        complete: false
+      };
+      cache.push(new Uint8Array(payload));
+      if (this.state !== State.STOPPED) {
+        this.state = State.WAITING_INIT_PTS;
+      }
+    }
+  }
+  _handleFragmentLoadComplete(fragLoadedData) {
+    if (this.waitingData) {
+      this.waitingData.complete = true;
+      return;
+    }
+    super._handleFragmentLoadComplete(fragLoadedData);
+  }
+  onBufferReset(/* event: Events.BUFFER_RESET */
+  ) {
+    // reset reference to sourcebuffers
+    this.mediaBuffer = null;
+  }
+  onBufferCreated(event, data) {
+    this.bufferFlushed = this.flushing = false;
+    const audioTrack = data.tracks.audio;
+    if (audioTrack) {
+      this.mediaBuffer = audioTrack.buffer || null;
+    }
+  }
+  onFragLoading(event, data) {
+    if (!this.audioOnly && data.frag.type === PlaylistLevelType.MAIN && isMediaFragment(data.frag)) {
+      this.mainFragLoading = data;
+      if (this.state === State.IDLE) {
+        this.tick();
+      }
+    }
+  }
+  onFragBuffered(event, data) {
+    const {
+      frag,
+      part
+    } = data;
+    if (frag.type !== PlaylistLevelType.AUDIO) {
+      if (!this.audioOnly && frag.type === PlaylistLevelType.MAIN && !frag.elementaryStreams.video && !frag.elementaryStreams.audiovideo) {
+        this.audioOnly = true;
+        this.mainFragLoading = null;
+      }
+      return;
+    }
+    if (this.fragContextChanged(frag)) {
+      // If a level switch was requested while a fragment was buffering, it will emit the FRAG_BUFFERED event upon completion
+      // Avoid setting state back to IDLE or concluding the audio switch; otherwise, the switched-to track will not buffer
+      this.warn(`Fragment ${frag.sn}${part ? ' p: ' + part.index : ''} of level ${frag.level} finished buffering, but was aborted. state: ${this.state}, audioSwitch: ${this.switchingTrack ? this.switchingTrack.name : 'false'}`);
+      return;
+    }
+    if (isMediaFragment(frag)) {
+      this.fragPrevious = frag;
+      const track = this.switchingTrack;
+      if (track) {
+        this.bufferedTrack = track;
+        this.switchingTrack = null;
+        this.hls.trigger(Events.AUDIO_TRACK_SWITCHED, _objectSpread2({}, track));
+      }
+    }
+    this.fragBufferedComplete(frag, part);
+    if (this.media) {
+      this.tick();
+    }
+  }
+  onError(event, data) {
+    var _data$context;
+    if (data.fatal) {
+      this.state = State.ERROR;
+      return;
+    }
+    switch (data.details) {
+      case ErrorDetails.FRAG_GAP:
+      case ErrorDetails.FRAG_PARSING_ERROR:
+      case ErrorDetails.FRAG_DECRYPT_ERROR:
+      case ErrorDetails.FRAG_LOAD_ERROR:
+      case ErrorDetails.FRAG_LOAD_TIMEOUT:
+      case ErrorDetails.KEY_LOAD_ERROR:
+      case ErrorDetails.KEY_LOAD_TIMEOUT:
+        this.onFragmentOrKeyLoadError(PlaylistLevelType.AUDIO, data);
+        break;
+      case ErrorDetails.AUDIO_TRACK_LOAD_ERROR:
+      case ErrorDetails.AUDIO_TRACK_LOAD_TIMEOUT:
+      case ErrorDetails.LEVEL_PARSING_ERROR:
+        // in case of non fatal error while loading track, if not retrying to load track, switch back to IDLE
+        if (!data.levelRetry && this.state === State.WAITING_TRACK && ((_data$context = data.context) == null ? void 0 : _data$context.type) === PlaylistContextType.AUDIO_TRACK) {
+          this.state = State.IDLE;
+        }
+        break;
+      case ErrorDetails.BUFFER_ADD_CODEC_ERROR:
+      case ErrorDetails.BUFFER_APPEND_ERROR:
+        if (data.parent !== 'audio') {
+          return;
+        }
+        if (!this.reduceLengthAndFlushBuffer(data)) {
+          this.resetLoadingState();
+        }
+        break;
+      case ErrorDetails.BUFFER_FULL_ERROR:
+        if (data.parent !== 'audio') {
+          return;
+        }
+        if (this.reduceLengthAndFlushBuffer(data)) {
+          this.bufferedTrack = null;
+          super.flushMainBuffer(0, Number.POSITIVE_INFINITY, 'audio');
+        }
+        break;
+      case ErrorDetails.INTERNAL_EXCEPTION:
+        this.recoverWorkerError(data);
+        break;
+    }
+  }
+  onBufferFlushing(event, {
+    type
+  }) {
+    if (type !== ElementaryStreamTypes.VIDEO) {
+      this.flushing = true;
+    }
+  }
+  onBufferFlushed(event, {
+    type
+  }) {
+    if (type !== ElementaryStreamTypes.VIDEO) {
+      this.flushing = false;
+      this.bufferFlushed = true;
+      if (this.state === State.ENDED) {
+        this.state = State.IDLE;
+      }
+      const mediaBuffer = this.mediaBuffer || this.media;
+      if (mediaBuffer) {
+        this.afterBufferFlushed(mediaBuffer, type, PlaylistLevelType.AUDIO);
+        this.tick();
+      }
+    }
+  }
+  _handleTransmuxComplete(transmuxResult) {
+    var _id3$samples;
+    const id = 'audio';
+    const {
+      hls
+    } = this;
+    const {
+      remuxResult,
+      chunkMeta
+    } = transmuxResult;
+    const context = this.getCurrentContext(chunkMeta);
+    if (!context) {
+      this.resetWhenMissingContext(chunkMeta);
+      return;
+    }
+    const {
+      frag,
+      part,
+      level
+    } = context;
+    const {
+      details
+    } = level;
+    const {
+      audio,
+      text,
+      id3,
+      initSegment
+    } = remuxResult;
+
+    // Check if the current fragment has been aborted. We check this by first seeing if we're still playing the current level.
+    // If we are, subsequently check if the currently loading fragment (fragCurrent) has changed.
+    if (this.fragContextChanged(frag) || !details) {
+      this.fragmentTracker.removeFragment(frag);
+      return;
+    }
+    this.state = State.PARSING;
+    if (this.switchingTrack && audio) {
+      this.completeAudioSwitch(this.switchingTrack);
+    }
+    if (initSegment != null && initSegment.tracks) {
+      const mapFragment = frag.initSegment || frag;
+      if (this.unhandledEncryptionError(initSegment, frag)) {
+        return;
+      }
+      this._bufferInitSegment(level, initSegment.tracks, mapFragment, chunkMeta);
+      hls.trigger(Events.FRAG_PARSING_INIT_SEGMENT, {
+        frag: mapFragment,
+        id,
+        tracks: initSegment.tracks
+      });
+      // Only flush audio from old audio tracks when PTS is known on new audio track
+    }
+    if (audio) {
+      const {
+        startPTS,
+        endPTS,
+        startDTS,
+        endDTS
+      } = audio;
+      if (part) {
+        part.elementaryStreams[ElementaryStreamTypes.AUDIO] = {
+          startPTS,
+          endPTS,
+          startDTS,
+          endDTS
+        };
+      }
+      frag.setElementaryStreamInfo(ElementaryStreamTypes.AUDIO, startPTS, endPTS, startDTS, endDTS);
+      this.bufferFragmentData(audio, frag, part, chunkMeta);
+    }
+    if (id3 != null && (_id3$samples = id3.samples) != null && _id3$samples.length) {
+      const emittedID3 = _extends({
+        id,
+        frag,
+        details
+      }, id3);
+      hls.trigger(Events.FRAG_PARSING_METADATA, emittedID3);
+    }
+    if (text) {
+      const emittedText = _extends({
+        id,
+        frag,
+        details
+      }, text);
+      hls.trigger(Events.FRAG_PARSING_USERDATA, emittedText);
+    }
+  }
+  _bufferInitSegment(currentLevel, tracks, frag, chunkMeta) {
+    if (this.state !== State.PARSING) {
+      return;
+    }
+    // delete any video track found on audio transmuxer
+    if (tracks.video) {
+      delete tracks.video;
+    }
+    if (tracks.audiovideo) {
+      delete tracks.audiovideo;
+    }
+
+    // include levelCodec in audio and video tracks
+    if (!tracks.audio) {
+      return;
+    }
+    const track = tracks.audio;
+    track.id = PlaylistLevelType.AUDIO;
+    const variantAudioCodecs = currentLevel.audioCodec;
+    this.log(`Init audio buffer, container:${track.container}, codecs[level/parsed]=[${variantAudioCodecs}/${track.codec}]`);
+    // SourceBuffer will use track.levelCodec if defined
+    if (variantAudioCodecs && variantAudioCodecs.split(',').length === 1) {
+      track.levelCodec = variantAudioCodecs;
+    }
+    this.hls.trigger(Events.BUFFER_CODECS, tracks);
+    const initSegment = track.initSegment;
+    if (initSegment != null && initSegment.byteLength) {
+      const segment = {
+        type: 'audio',
+        frag,
+        part: null,
+        chunkMeta,
+        parent: frag.type,
+        data: initSegment
+      };
+      this.hls.trigger(Events.BUFFER_APPENDING, segment);
+    }
+    // trigger handler right now
+    this.tickImmediate();
+  }
+  loadFragment(frag, track, targetBufferTime) {
+    // only load if fragment is not loaded or if in audio switch
+    const fragState = this.fragmentTracker.getState(frag);
+
+    // we force a frag loading in audio switch as fragment tracker might not have evicted previous frags in case of quick audio switch
+    if (this.switchingTrack || fragState === FragmentState.NOT_LOADED || fragState === FragmentState.PARTIAL) {
+      var _track$details;
+      if (!isMediaFragment(frag)) {
+        this._loadInitSegment(frag, track);
+      } else if ((_track$details = track.details) != null && _track$details.live && !this.initPTS[frag.cc]) {
+        this.log(`Waiting for video PTS in continuity counter ${frag.cc} of live stream before loading audio fragment ${frag.sn} of level ${this.trackId}`);
+        this.state = State.WAITING_INIT_PTS;
+        const mainDetails = this.mainDetails;
+        if (mainDetails && mainDetails.fragmentStart !== track.details.fragmentStart) {
+          alignMediaPlaylistByPDT(track.details, mainDetails);
+        }
+      } else {
+        super.loadFragment(frag, track, targetBufferTime);
+      }
+    } else {
+      this.clearTrackerIfNeeded(frag);
+    }
+  }
+  flushAudioIfNeeded(switchingTrack) {
+    if (this.media && this.bufferedTrack) {
+      const {
+        name,
+        lang,
+        assocLang,
+        characteristics,
+        audioCodec,
+        channels
+      } = this.bufferedTrack;
+      if (!matchesOption({
+        name,
+        lang,
+        assocLang,
+        characteristics,
+        audioCodec,
+        channels
+      }, switchingTrack, audioMatchPredicate)) {
+        if (useAlternateAudio(switchingTrack.url, this.hls)) {
+          this.log('Switching audio track : flushing all audio');
+          super.flushMainBuffer(0, Number.POSITIVE_INFINITY, 'audio');
+          this.bufferedTrack = null;
+        } else {
+          // Main is being buffered. Set bufferedTrack so that it is flushed when switching back to alt-audio
+          this.bufferedTrack = switchingTrack;
+        }
+      }
+    }
+  }
+  completeAudioSwitch(switchingTrack) {
+    const {
+      hls
+    } = this;
+    this.flushAudioIfNeeded(switchingTrack);
+    this.bufferedTrack = switchingTrack;
+    this.switchingTrack = null;
+    hls.trigger(Events.AUDIO_TRACK_SWITCHED, _objectSpread2({}, switchingTrack));
+  }
+}
+
+class BasePlaylistController extends Logger {
+  constructor(hls, logPrefix) {
+    super(logPrefix, hls.logger);
+    this.hls = void 0;
+    this.canLoad = false;
+    this.timer = -1;
+    this.hls = hls;
+  }
+  destroy() {
+    this.clearTimer();
+    // @ts-ignore
+    this.hls = this.log = this.warn = null;
+  }
+  clearTimer() {
+    if (this.timer !== -1) {
+      self.clearTimeout(this.timer);
+      this.timer = -1;
+    }
+  }
+  startLoad() {
+    this.canLoad = true;
+    this.loadPlaylist();
+  }
+  stopLoad() {
+    this.canLoad = false;
+    this.clearTimer();
+  }
+  switchParams(playlistUri, previous, current) {
+    const renditionReports = previous == null ? void 0 : previous.renditionReports;
+    if (renditionReports) {
+      let foundIndex = -1;
+      for (let i = 0; i < renditionReports.length; i++) {
+        const attr = renditionReports[i];
+        let uri;
+        try {
+          uri = new self.URL(attr.URI, previous.url).href;
+        } catch (error) {
+          this.warn(`Could not construct new URL for Rendition Report: ${error}`);
+          uri = attr.URI || '';
+        }
+        // Use exact match. Otherwise, the last partial match, if any, will be used
+        // (Playlist URI includes a query string that the Rendition Report does not)
+        if (uri === playlistUri) {
+          foundIndex = i;
+          break;
+        } else if (uri === playlistUri.substring(0, uri.length)) {
+          foundIndex = i;
+        }
+      }
+      if (foundIndex !== -1) {
+        const attr = renditionReports[foundIndex];
+        const msn = parseInt(attr['LAST-MSN']) || previous.lastPartSn;
+        let part = parseInt(attr['LAST-PART']) || previous.lastPartIndex;
+        if (this.hls.config.lowLatencyMode) {
+          const currentGoal = Math.min(previous.age - previous.partTarget, previous.targetduration);
+          if (part >= 0 && currentGoal > previous.partTarget) {
+            part += 1;
+          }
+        }
+        const skip = current && getSkipValue(current);
+        return new HlsUrlParameters(msn, part >= 0 ? part : undefined, skip);
+      }
+    }
+  }
+  loadPlaylist(hlsUrlParameters) {
+    // Loading is handled by the subclasses
+    this.clearTimer();
+  }
+  loadingPlaylist(playlist, hlsUrlParameters) {
+    // Loading is handled by the subclasses
+    this.clearTimer();
+  }
+  shouldLoadPlaylist(playlist) {
+    return this.canLoad && !!playlist && !!playlist.url && (!playlist.details || playlist.details.live);
+  }
+  getUrlWithDirectives(uri, hlsUrlParameters) {
+    if (hlsUrlParameters) {
+      try {
+        return hlsUrlParameters.addDirectives(uri);
+      } catch (error) {
+        this.warn(`Could not construct new URL with HLS Delivery Directives: ${error}`);
+      }
+    }
+    return uri;
+  }
+  playlistLoaded(index, data, previousDetails) {
+    const {
+      details,
+      stats
+    } = data;
+
+    // Set last updated date-time
+    const now = self.performance.now();
+    const elapsed = stats.loading.first ? Math.max(0, now - stats.loading.first) : 0;
+    details.advancedDateTime = Date.now() - elapsed;
+
+    // shift fragment starts with timelineOffset
+    const timelineOffset = this.hls.config.timelineOffset;
+    if (timelineOffset !== details.appliedTimelineOffset) {
+      const offset = Math.max(timelineOffset || 0, 0);
+      details.appliedTimelineOffset = offset;
+      details.fragments.forEach(frag => {
+        frag.setStart(frag.playlistOffset + offset);
+      });
+    }
+
+    // if current playlist is a live playlist, arm a timer to reload it
+    if (details.live || previousDetails != null && previousDetails.live) {
+      const levelOrTrack = 'levelInfo' in data ? data.levelInfo : data.track;
+      details.reloaded(previousDetails);
+      // Merge live playlists to adjust fragment starts and fill in delta playlist skipped segments
+      if (previousDetails && details.fragments.length > 0) {
+        mergeDetails(previousDetails, details, this);
+        const error = details.playlistParsingError;
+        if (error) {
+          this.warn(error);
+          const hls = this.hls;
+          if (!hls.config.ignorePlaylistParsingErrors) {
+            var _details$fragments$;
+            const {
+              networkDetails
+            } = data;
+            hls.trigger(Events.ERROR, {
+              type: ErrorTypes.NETWORK_ERROR,
+              details: ErrorDetails.LEVEL_PARSING_ERROR,
+              fatal: false,
+              url: details.url,
+              error,
+              reason: error.message,
+              level: data.level || undefined,
+              parent: (_details$fragments$ = details.fragments[0]) == null ? void 0 : _details$fragments$.type,
+              networkDetails,
+              stats
+            });
+            return;
+          }
+          details.playlistParsingError = null;
+        }
+      }
+      if (details.requestScheduled === -1) {
+        details.requestScheduled = stats.loading.start;
+      }
+      const bufferInfo = this.hls.mainForwardBufferInfo;
+      const position = bufferInfo ? bufferInfo.end - bufferInfo.len : 0;
+      const distanceToLiveEdgeMs = (details.edge - position) * 1000;
+      const reloadInterval = computeReloadInterval(details, distanceToLiveEdgeMs);
+      if (details.requestScheduled + reloadInterval < now) {
+        details.requestScheduled = now;
+      } else {
+        details.requestScheduled += reloadInterval;
+      }
+      this.log(`live playlist ${index} ${details.advanced ? 'REFRESHED ' + details.lastPartSn + '-' + details.lastPartIndex : details.updated ? 'UPDATED' : 'MISSED'}`);
+      if (!this.canLoad || !details.live) {
+        return;
+      }
+      let deliveryDirectives;
+      let msn = undefined;
+      let part = undefined;
+      if (details.canBlockReload && details.endSN && details.advanced) {
+        // Load level with LL-HLS delivery directives
+        const lowLatencyMode = this.hls.config.lowLatencyMode;
+        const lastPartSn = details.lastPartSn;
+        const endSn = details.endSN;
+        const lastPartIndex = details.lastPartIndex;
+        const hasParts = lastPartIndex !== -1;
+        const atLastPartOfSegment = lastPartSn === endSn;
+        if (hasParts) {
+          // When low latency mode is disabled, request the last part of the next segment
+          if (atLastPartOfSegment) {
+            msn = endSn + 1;
+            part = lowLatencyMode ? 0 : lastPartIndex;
+          } else {
+            msn = lastPartSn;
+            part = lowLatencyMode ? lastPartIndex + 1 : details.maxPartIndex;
+          }
+        } else {
+          msn = endSn + 1;
+        }
+        // Low-Latency CDN Tune-in: "age" header and time since load indicates we're behind by more than one part
+        // Update directives to obtain the Playlist that has the estimated additional duration of media
+        const lastAdvanced = details.age;
+        const cdnAge = lastAdvanced + details.ageHeader;
+        let currentGoal = Math.min(cdnAge - details.partTarget, details.targetduration * 1.5);
+        if (currentGoal > 0) {
+          if (cdnAge > details.targetduration * 3) {
+            // Omit segment and part directives when the last response was more than 3 target durations ago,
+            this.log(`Playlist last advanced ${lastAdvanced.toFixed(2)}s ago. Omitting segment and part directives.`);
+            msn = undefined;
+            part = undefined;
+          } else if (previousDetails != null && previousDetails.tuneInGoal && cdnAge - details.partTarget > previousDetails.tuneInGoal) {
+            // If we attempted to get the next or latest playlist update, but currentGoal increased,
+            // then we either can't catchup, or the "age" header cannot be trusted.
+            this.warn(`CDN Tune-in goal increased from: ${previousDetails.tuneInGoal} to: ${currentGoal} with playlist age: ${details.age}`);
+            currentGoal = 0;
+          } else {
+            const segments = Math.floor(currentGoal / details.targetduration);
+            msn += segments;
+            if (part !== undefined) {
+              const parts = Math.round(currentGoal % details.targetduration / details.partTarget);
+              part += parts;
+            }
+            this.log(`CDN Tune-in age: ${details.ageHeader}s last advanced ${lastAdvanced.toFixed(2)}s goal: ${currentGoal} skip sn ${segments} to part ${part}`);
+          }
+          details.tuneInGoal = currentGoal;
+        }
+        deliveryDirectives = this.getDeliveryDirectives(details, data.deliveryDirectives, msn, part);
+        if (lowLatencyMode || !atLastPartOfSegment) {
+          details.requestScheduled = now;
+          this.loadingPlaylist(levelOrTrack, deliveryDirectives);
+          return;
+        }
+      } else if (details.canBlockReload || details.canSkipUntil) {
+        deliveryDirectives = this.getDeliveryDirectives(details, data.deliveryDirectives, msn, part);
+      }
+      if (deliveryDirectives && msn !== undefined && details.canBlockReload) {
+        details.requestScheduled = stats.loading.first + Math.max(reloadInterval - elapsed * 2, reloadInterval / 2);
+      }
+      this.scheduleLoading(levelOrTrack, deliveryDirectives, details);
+    } else {
+      this.clearTimer();
+    }
+  }
+  scheduleLoading(levelOrTrack, deliveryDirectives, updatedDetails) {
+    const details = updatedDetails || levelOrTrack.details;
+    if (!details) {
+      this.loadingPlaylist(levelOrTrack, deliveryDirectives);
+      return;
+    }
+    const now = self.performance.now();
+    const requestScheduled = details.requestScheduled;
+    if (now >= requestScheduled) {
+      this.loadingPlaylist(levelOrTrack, deliveryDirectives);
+      return;
+    }
+    const estimatedTimeUntilUpdate = requestScheduled - now;
+    this.log(`reload live playlist ${levelOrTrack.name || levelOrTrack.bitrate + 'bps'} in ${Math.round(estimatedTimeUntilUpdate)} ms`);
+    this.clearTimer();
+    this.timer = self.setTimeout(() => this.loadingPlaylist(levelOrTrack, deliveryDirectives), estimatedTimeUntilUpdate);
+  }
+  getDeliveryDirectives(details, previousDeliveryDirectives, msn, part) {
+    let skip = getSkipValue(details);
+    if (previousDeliveryDirectives != null && previousDeliveryDirectives.skip && details.deltaUpdateFailed) {
+      msn = previousDeliveryDirectives.msn;
+      part = previousDeliveryDirectives.part;
+      skip = HlsSkip.No;
+    }
+    return new HlsUrlParameters(msn, part, skip);
+  }
+  checkRetry(errorEvent) {
+    const errorDetails = errorEvent.details;
+    const isTimeout = isTimeoutError(errorEvent);
+    const errorAction = errorEvent.errorAction;
+    const {
+      action,
+      retryCount = 0,
+      retryConfig
+    } = errorAction || {};
+    const retry = !!errorAction && !!retryConfig && (action === NetworkErrorAction.RetryRequest || !errorAction.resolved && action === NetworkErrorAction.SendAlternateToPenaltyBox);
+    if (retry) {
+      var _errorEvent$context;
+      if (retryCount >= retryConfig.maxNumRetry) {
+        return false;
+      }
+      if (isTimeout && (_errorEvent$context = errorEvent.context) != null && _errorEvent$context.deliveryDirectives) {
+        // The LL-HLS request already timed out so retry immediately
+        this.warn(`Retrying playlist loading ${retryCount + 1}/${retryConfig.maxNumRetry} after "${errorDetails}" without delivery-directives`);
+        this.loadPlaylist();
+      } else {
+        const delay = getRetryDelay(retryConfig, retryCount);
+        // Schedule level/track reload
+        this.clearTimer();
+        this.timer = self.setTimeout(() => this.loadPlaylist(), delay);
+        this.warn(`Retrying playlist loading ${retryCount + 1}/${retryConfig.maxNumRetry} after "${errorDetails}" in ${delay}ms`);
+      }
+      // `levelRetry = true` used to inform other controllers that a retry is happening
+      errorEvent.levelRetry = true;
+      errorAction.resolved = true;
+    }
+    return retry;
+  }
+}
+
+function subtitleOptionsIdentical(trackList1, trackList2) {
+  if (trackList1.length !== trackList2.length) {
+    return false;
+  }
+  for (let i = 0; i < trackList1.length; i++) {
+    if (!mediaAttributesIdentical(trackList1[i].attrs, trackList2[i].attrs)) {
+      return false;
+    }
+  }
+  return true;
+}
+function mediaAttributesIdentical(attrs1, attrs2, customAttributes) {
+  // Media options with the same rendition ID must be bit identical
+  const stableRenditionId = attrs1['STABLE-RENDITION-ID'];
+  if (stableRenditionId && !customAttributes) {
+    return stableRenditionId === attrs2['STABLE-RENDITION-ID'];
+  }
+  // When rendition ID is not present, compare attributes
+  return !(customAttributes || ['LANGUAGE', 'NAME', 'CHARACTERISTICS', 'AUTOSELECT', 'DEFAULT', 'FORCED', 'ASSOC-LANGUAGE']).some(subtitleAttribute => attrs1[subtitleAttribute] !== attrs2[subtitleAttribute]);
+}
+function subtitleTrackMatchesTextTrack(subtitleTrack, textTrack) {
+  return textTrack.label.toLowerCase() === subtitleTrack.name.toLowerCase() && (!textTrack.language || textTrack.language.toLowerCase() === (subtitleTrack.lang || '').toLowerCase());
+}
+
+class AudioTrackController extends BasePlaylistController {
+  constructor(hls) {
+    super(hls, 'audio-track-controller');
+    this.tracks = [];
+    this.groupIds = null;
+    this.tracksInGroup = [];
+    this.trackId = -1;
+    this.currentTrack = null;
+    this.selectDefaultTrack = true;
+    this.registerListeners();
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.on(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.on(Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
+    hls.on(Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.off(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.off(Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
+    hls.off(Events.AUDIO_TRACK_LOADED, this.onAudioTrackLoaded, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.tracks.length = 0;
+    this.tracksInGroup.length = 0;
+    this.currentTrack = null;
+    super.destroy();
+  }
+  onManifestLoading() {
+    this.tracks = [];
+    this.tracksInGroup = [];
+    this.groupIds = null;
+    this.currentTrack = null;
+    this.trackId = -1;
+    this.selectDefaultTrack = true;
+  }
+  onManifestParsed(event, data) {
+    this.tracks = data.audioTracks || [];
+  }
+  onAudioTrackLoaded(event, data) {
+    const {
+      id,
+      groupId,
+      details
+    } = data;
+    const trackInActiveGroup = this.tracksInGroup[id];
+    if (!trackInActiveGroup || trackInActiveGroup.groupId !== groupId) {
+      this.warn(`Audio track with id:${id} and group:${groupId} not found in active group ${trackInActiveGroup == null ? void 0 : trackInActiveGroup.groupId}`);
+      return;
+    }
+    const curDetails = trackInActiveGroup.details;
+    trackInActiveGroup.details = data.details;
+    this.log(`Audio track ${id} "${trackInActiveGroup.name}" lang:${trackInActiveGroup.lang} group:${groupId} loaded [${details.startSN}-${details.endSN}]`);
+    if (id === this.trackId) {
+      this.playlistLoaded(id, data, curDetails);
+    }
+  }
+  onLevelLoading(event, data) {
+    this.switchLevel(data.level);
+  }
+  onLevelSwitching(event, data) {
+    this.switchLevel(data.level);
+  }
+  switchLevel(levelIndex) {
+    const levelInfo = this.hls.levels[levelIndex];
+    if (!levelInfo) {
+      return;
+    }
+    const audioGroups = levelInfo.audioGroups || null;
+    const currentGroups = this.groupIds;
+    let currentTrack = this.currentTrack;
+    if (!audioGroups || (currentGroups == null ? void 0 : currentGroups.length) !== (audioGroups == null ? void 0 : audioGroups.length) || audioGroups != null && audioGroups.some(groupId => (currentGroups == null ? void 0 : currentGroups.indexOf(groupId)) === -1)) {
+      this.groupIds = audioGroups;
+      this.trackId = -1;
+      this.currentTrack = null;
+      const audioTracks = this.tracks.filter(track => !audioGroups || audioGroups.indexOf(track.groupId) !== -1);
+      if (audioTracks.length) {
+        // Disable selectDefaultTrack if there are no default tracks
+        if (this.selectDefaultTrack && !audioTracks.some(track => track.default)) {
+          this.selectDefaultTrack = false;
+        }
+        // track.id should match hls.audioTracks index
+        audioTracks.forEach((track, i) => {
+          track.id = i;
+        });
+      } else if (!currentTrack && !this.tracksInGroup.length) {
+        // Do not dispatch AUDIO_TRACKS_UPDATED when there were and are no tracks
+        return;
+      }
+      this.tracksInGroup = audioTracks;
+
+      // Find preferred track
+      const audioPreference = this.hls.config.audioPreference;
+      if (!currentTrack && audioPreference) {
+        const groupIndex = findMatchingOption(audioPreference, audioTracks, audioMatchPredicate);
+        if (groupIndex > -1) {
+          currentTrack = audioTracks[groupIndex];
+        } else {
+          const allIndex = findMatchingOption(audioPreference, this.tracks);
+          currentTrack = this.tracks[allIndex];
+        }
+      }
+
+      // Select initial track
+      let trackId = this.findTrackId(currentTrack);
+      if (trackId === -1 && currentTrack) {
+        trackId = this.findTrackId(null);
+      }
+
+      // Dispatch events and load track if needed
+      const audioTracksUpdated = {
+        audioTracks
+      };
+      this.log(`Updating audio tracks, ${audioTracks.length} track(s) found in group(s): ${audioGroups == null ? void 0 : audioGroups.join(',')}`);
+      this.hls.trigger(Events.AUDIO_TRACKS_UPDATED, audioTracksUpdated);
+      const selectedTrackId = this.trackId;
+      if (trackId !== -1 && selectedTrackId === -1) {
+        this.setAudioTrack(trackId);
+      } else if (audioTracks.length && selectedTrackId === -1) {
+        var _this$groupIds;
+        const error = new Error(`No audio track selected for current audio group-ID(s): ${(_this$groupIds = this.groupIds) == null ? void 0 : _this$groupIds.join(',')} track count: ${audioTracks.length}`);
+        this.warn(error.message);
+        this.hls.trigger(Events.ERROR, {
+          type: ErrorTypes.MEDIA_ERROR,
+          details: ErrorDetails.AUDIO_TRACK_LOAD_ERROR,
+          fatal: true,
+          error
+        });
+      }
+    }
+  }
+  onError(event, data) {
+    if (data.fatal || !data.context) {
+      return;
+    }
+    if (data.context.type === PlaylistContextType.AUDIO_TRACK && data.context.id === this.trackId && (!this.groupIds || this.groupIds.indexOf(data.context.groupId) !== -1)) {
+      this.checkRetry(data);
+    }
+  }
+  get allAudioTracks() {
+    return this.tracks;
+  }
+  get audioTracks() {
+    return this.tracksInGroup;
+  }
+  get audioTrack() {
+    return this.trackId;
+  }
+  set audioTrack(newId) {
+    // If audio track is selected from API then don't choose from the manifest default track
+    this.selectDefaultTrack = false;
+    this.setAudioTrack(newId);
+  }
+  setAudioOption(audioOption) {
+    const hls = this.hls;
+    hls.config.audioPreference = audioOption;
+    if (audioOption) {
+      const allAudioTracks = this.allAudioTracks;
+      this.selectDefaultTrack = false;
+      if (allAudioTracks.length) {
+        // First see if current option matches (no switch op)
+        const currentTrack = this.currentTrack;
+        if (currentTrack && matchesOption(audioOption, currentTrack, audioMatchPredicate)) {
+          return currentTrack;
+        }
+        // Find option in available tracks (tracksInGroup)
+        const groupIndex = findMatchingOption(audioOption, this.tracksInGroup, audioMatchPredicate);
+        if (groupIndex > -1) {
+          const track = this.tracksInGroup[groupIndex];
+          this.setAudioTrack(groupIndex);
+          return track;
+        } else if (currentTrack) {
+          // Find option in nearest level audio group
+          let searchIndex = hls.loadLevel;
+          if (searchIndex === -1) {
+            searchIndex = hls.firstAutoLevel;
+          }
+          const switchIndex = findClosestLevelWithAudioGroup(audioOption, hls.levels, allAudioTracks, searchIndex, audioMatchPredicate);
+          if (switchIndex === -1) {
+            // could not find matching variant
+            return null;
+          }
+          // and switch level to acheive the audio group switch
+          hls.nextLoadLevel = switchIndex;
+        }
+        if (audioOption.channels || audioOption.audioCodec) {
+          // Could not find a match with codec / channels predicate
+          // Find a match without channels or codec
+          const withoutCodecAndChannelsMatch = findMatchingOption(audioOption, allAudioTracks);
+          if (withoutCodecAndChannelsMatch > -1) {
+            return allAudioTracks[withoutCodecAndChannelsMatch];
+          }
+        }
+      }
+    }
+    return null;
+  }
+  setAudioTrack(newId) {
+    const tracks = this.tracksInGroup;
+
+    // check if level idx is valid
+    if (newId < 0 || newId >= tracks.length) {
+      this.warn(`Invalid audio track id: ${newId}`);
+      return;
+    }
+    this.selectDefaultTrack = false;
+    const lastTrack = this.currentTrack;
+    const track = tracks[newId];
+    const trackLoaded = track.details && !track.details.live;
+    if (newId === this.trackId && track === lastTrack && trackLoaded) {
+      return;
+    }
+    this.log(`Switching to audio-track ${newId} "${track.name}" lang:${track.lang} group:${track.groupId} channels:${track.channels}`);
+    this.trackId = newId;
+    this.currentTrack = track;
+    this.hls.trigger(Events.AUDIO_TRACK_SWITCHING, _objectSpread2({}, track));
+    // Do not reload track unless live
+    if (trackLoaded) {
+      return;
+    }
+    const hlsUrlParameters = this.switchParams(track.url, lastTrack == null ? void 0 : lastTrack.details, track.details);
+    this.loadPlaylist(hlsUrlParameters);
+  }
+  findTrackId(currentTrack) {
+    const audioTracks = this.tracksInGroup;
+    for (let i = 0; i < audioTracks.length; i++) {
+      const track = audioTracks[i];
+      if (this.selectDefaultTrack && !track.default) {
+        continue;
+      }
+      if (!currentTrack || matchesOption(currentTrack, track, audioMatchPredicate)) {
+        return i;
+      }
+    }
+    if (currentTrack) {
+      const {
+        name,
+        lang,
+        assocLang,
+        characteristics,
+        audioCodec,
+        channels
+      } = currentTrack;
+      for (let i = 0; i < audioTracks.length; i++) {
+        const track = audioTracks[i];
+        if (matchesOption({
+          name,
+          lang,
+          assocLang,
+          characteristics,
+          audioCodec,
+          channels
+        }, track, audioMatchPredicate)) {
+          return i;
+        }
+      }
+      for (let i = 0; i < audioTracks.length; i++) {
+        const track = audioTracks[i];
+        if (mediaAttributesIdentical(currentTrack.attrs, track.attrs, ['LANGUAGE', 'ASSOC-LANGUAGE', 'CHARACTERISTICS'])) {
+          return i;
+        }
+      }
+      for (let i = 0; i < audioTracks.length; i++) {
+        const track = audioTracks[i];
+        if (mediaAttributesIdentical(currentTrack.attrs, track.attrs, ['LANGUAGE'])) {
+          return i;
+        }
+      }
+    }
+    return -1;
+  }
+  loadPlaylist(hlsUrlParameters) {
+    super.loadPlaylist();
+    const audioTrack = this.currentTrack;
+    if (!this.shouldLoadPlaylist(audioTrack)) {
+      return;
+    }
+    // Do not load audio rendition with URI matching main variant URI
+    if (useAlternateAudio(audioTrack.url, this.hls)) {
+      this.scheduleLoading(audioTrack, hlsUrlParameters);
+    }
+  }
+  loadingPlaylist(audioTrack, hlsUrlParameters) {
+    super.loadingPlaylist(audioTrack, hlsUrlParameters);
+    const id = audioTrack.id;
+    const groupId = audioTrack.groupId;
+    const url = this.getUrlWithDirectives(audioTrack.url, hlsUrlParameters);
+    const details = audioTrack.details;
+    const age = details == null ? void 0 : details.age;
+    this.log(`Loading audio-track ${id} "${audioTrack.name}" lang:${audioTrack.lang} group:${groupId}${(hlsUrlParameters == null ? void 0 : hlsUrlParameters.msn) !== undefined ? ' at sn ' + hlsUrlParameters.msn + ' part ' + hlsUrlParameters.part : ''}${age && details.live ? ' age ' + age.toFixed(1) + (details.type ? ' ' + details.type || '' : '') : ''} ${url}`);
+    this.hls.trigger(Events.AUDIO_TRACK_LOADING, {
+      url,
+      id,
+      groupId,
+      deliveryDirectives: hlsUrlParameters || null,
+      track: audioTrack
+    });
+  }
+}
+
+class BufferOperationQueue {
+  constructor(sourceBufferReference) {
+    this.tracks = void 0;
+    this.queues = {
+      video: [],
+      audio: [],
+      audiovideo: []
+    };
+    this.tracks = sourceBufferReference;
+  }
+  destroy() {
+    this.tracks = this.queues = null;
+  }
+  append(operation, type, pending) {
+    if (this.queues === null || this.tracks === null) {
+      return;
+    }
+    const queue = this.queues[type];
+    queue.push(operation);
+    if (queue.length === 1 && !pending) {
+      this.executeNext(type);
+    }
+  }
+  appendBlocker(type) {
+    return new Promise(resolve => {
+      const operation = {
+        label: 'async-blocker',
+        execute: resolve,
+        onStart: () => {},
+        onComplete: () => {},
+        onError: () => {}
+      };
+      this.append(operation, type);
+    });
+  }
+  prependBlocker(type) {
+    return new Promise(resolve => {
+      if (this.queues) {
+        const operation = {
+          label: 'async-blocker-prepend',
+          execute: resolve,
+          onStart: () => {},
+          onComplete: () => {},
+          onError: () => {}
+        };
+        this.queues[type].unshift(operation);
+      }
+    });
+  }
+  removeBlockers() {
+    if (this.queues === null) {
+      return;
+    }
+    [this.queues.video, this.queues.audio, this.queues.audiovideo].forEach(queue => {
+      var _queue$;
+      const label = (_queue$ = queue[0]) == null ? void 0 : _queue$.label;
+      if (label === 'async-blocker' || label === 'async-blocker-prepend') {
+        queue[0].execute();
+        queue.splice(0, 1);
+      }
+    });
+  }
+  unblockAudio(op) {
+    if (this.queues === null) {
+      return;
+    }
+    const queue = this.queues.audio;
+    if (queue[0] === op) {
+      this.shiftAndExecuteNext('audio');
+    }
+  }
+  executeNext(type) {
+    if (this.queues === null || this.tracks === null) {
+      return;
+    }
+    const queue = this.queues[type];
+    if (queue.length) {
+      const operation = queue[0];
+      try {
+        // Operations are expected to result in an 'updateend' event being fired. If not, the queue will lock. Operations
+        // which do not end with this event must call _onSBUpdateEnd manually
+        operation.execute();
+      } catch (error) {
+        var _this$tracks$type;
+        operation.onError(error);
+        if (this.queues === null || this.tracks === null) {
+          return;
+        }
+
+        // Only shift the current operation off, otherwise the updateend handler will do this for us
+        const sb = (_this$tracks$type = this.tracks[type]) == null ? void 0 : _this$tracks$type.buffer;
+        if (!(sb != null && sb.updating)) {
+          this.shiftAndExecuteNext(type);
+        }
+      }
+    }
+  }
+  shiftAndExecuteNext(type) {
+    if (this.queues === null) {
+      return;
+    }
+    this.queues[type].shift();
+    this.executeNext(type);
+  }
+  current(type) {
+    var _this$queues;
+    return ((_this$queues = this.queues) == null ? void 0 : _this$queues[type][0]) || null;
+  }
+  toString() {
+    const {
+      queues,
+      tracks
+    } = this;
+    if (queues === null || tracks === null) {
+      return `<destroyed>`;
+    }
+    return `
+${this.list('video')}
+${this.list('audio')}
+${this.list('audiovideo')}}`;
+  }
+  list(type) {
+    var _this$queues2, _this$tracks;
+    return (_this$queues2 = this.queues) != null && _this$queues2[type] || (_this$tracks = this.tracks) != null && _this$tracks[type] ? `${type}: (${this.listSbInfo(type)}) ${this.listOps(type)}` : '';
+  }
+  listSbInfo(type) {
+    var _this$tracks2;
+    const track = (_this$tracks2 = this.tracks) == null ? void 0 : _this$tracks2[type];
+    const sb = track == null ? void 0 : track.buffer;
+    if (!sb) {
+      return 'none';
+    }
+    return `SourceBuffer${sb.updating ? ' updating' : ''}${track.ended ? ' ended' : ''}${track.ending ? ' ending' : ''}`;
+  }
+  listOps(type) {
+    var _this$queues3;
+    return ((_this$queues3 = this.queues) == null ? void 0 : _this$queues3[type].map(op => op.label).join(', ')) || '';
+  }
+}
+
+const VIDEO_CODEC_PROFILE_REPLACE = /(avc[1234]|hvc1|hev1|dvh[1e]|vp09|av01)(?:\.[^.,]+)+/;
+const TRACK_REMOVED_ERROR_NAME = 'HlsJsTrackRemovedError';
+class HlsJsTrackRemovedError extends Error {
+  constructor(message) {
+    super(message);
+    this.name = TRACK_REMOVED_ERROR_NAME;
+  }
+}
+class BufferController extends Logger {
+  constructor(hls, fragmentTracker) {
+    super('buffer-controller', hls.logger);
+    this.hls = void 0;
+    this.fragmentTracker = void 0;
+    // The level details used to determine duration, target-duration and live
+    this.details = null;
+    // cache the self generated object url to detect hijack of video tag
+    this._objectUrl = null;
+    // A queue of buffer operations which require the SourceBuffer to not be updating upon execution
+    this.operationQueue = null;
+    // The total number track codecs expected before any sourceBuffers are created (2: audio and video or 1: audiovideo | audio | video)
+    this.bufferCodecEventsTotal = 0;
+    // A reference to the attached media element
+    this.media = null;
+    // A reference to the active media source
+    this.mediaSource = null;
+    // Last MP3 audio chunk appended
+    this.lastMpegAudioChunk = null;
+    // Audio fragment blocked from appending until corresponding video appends or context changes
+    this.blockedAudioAppend = null;
+    // Keep track of video append position for unblocking audio
+    this.lastVideoAppendEnd = 0;
+    // Whether or not to use ManagedMediaSource API and append source element to media element.
+    this.appendSource = void 0;
+    // Transferred MediaSource information used to detmerine if duration end endstream may be appended
+    this.transferData = void 0;
+    // Directives used to override default MediaSource handling
+    this.overrides = void 0;
+    // Error counters
+    this.appendErrors = {
+      audio: 0,
+      video: 0,
+      audiovideo: 0
+    };
+    // Record of required or created buffers by type. SourceBuffer is stored in Track.buffer once created.
+    this.tracks = {};
+    // Array of SourceBuffer type and SourceBuffer (or null). One entry per TrackSet in this.tracks.
+    this.sourceBuffers = [[null, null], [null, null]];
+    this._onEndStreaming = event => {
+      var _this$mediaSource;
+      if (!this.hls) {
+        return;
+      }
+      if (((_this$mediaSource = this.mediaSource) == null ? void 0 : _this$mediaSource.readyState) !== 'open') {
+        return;
+      }
+      this.hls.pauseBuffering();
+    };
+    this._onStartStreaming = event => {
+      if (!this.hls) {
+        return;
+      }
+      this.hls.resumeBuffering();
+    };
+    // Keep as arrow functions so that we can directly reference these functions directly as event listeners
+    this._onMediaSourceOpen = e => {
+      const {
+        media,
+        mediaSource
+      } = this;
+      if (e) {
+        this.log('Media source opened');
+      }
+      if (!media || !mediaSource) {
+        return;
+      }
+      // once received, don't listen anymore to sourceopen event
+      mediaSource.removeEventListener('sourceopen', this._onMediaSourceOpen);
+      media.removeEventListener('emptied', this._onMediaEmptied);
+      this.updateDuration();
+      this.hls.trigger(Events.MEDIA_ATTACHED, {
+        media,
+        mediaSource: mediaSource
+      });
+      if (this.mediaSource !== null) {
+        this.checkPendingTracks();
+      }
+    };
+    this._onMediaSourceClose = () => {
+      this.log('Media source closed');
+    };
+    this._onMediaSourceEnded = () => {
+      this.log('Media source ended');
+    };
+    this._onMediaEmptied = () => {
+      const {
+        mediaSrc,
+        _objectUrl
+      } = this;
+      if (mediaSrc !== _objectUrl) {
+        this.error(`Media element src was set while attaching MediaSource (${_objectUrl} > ${mediaSrc})`);
+      }
+    };
+    this.hls = hls;
+    this.fragmentTracker = fragmentTracker;
+    this.appendSource = isManagedMediaSource(getMediaSource(hls.config.preferManagedMediaSource));
+    this.initTracks();
+    this.registerListeners();
+  }
+  hasSourceTypes() {
+    return Object.keys(this.tracks).length > 0;
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.details = null;
+    this.lastMpegAudioChunk = this.blockedAudioAppend = null;
+    this.transferData = this.overrides = undefined;
+    if (this.operationQueue) {
+      this.operationQueue.destroy();
+      this.operationQueue = null;
+    }
+    // @ts-ignore
+    this.hls = this.fragmentTracker = null;
+    // @ts-ignore
+    this._onMediaSourceOpen = this._onMediaSourceClose = null;
+    // @ts-ignore
+    this._onMediaSourceEnded = null;
+    // @ts-ignore
+    this._onStartStreaming = this._onEndStreaming = null;
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.on(Events.BUFFER_RESET, this.onBufferReset, this);
+    hls.on(Events.BUFFER_APPENDING, this.onBufferAppending, this);
+    hls.on(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+    hls.on(Events.BUFFER_EOS, this.onBufferEos, this);
+    hls.on(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+    hls.on(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+    hls.on(Events.FRAG_PARSED, this.onFragParsed, this);
+    hls.on(Events.FRAG_CHANGED, this.onFragChanged, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.off(Events.BUFFER_RESET, this.onBufferReset, this);
+    hls.off(Events.BUFFER_APPENDING, this.onBufferAppending, this);
+    hls.off(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+    hls.off(Events.BUFFER_EOS, this.onBufferEos, this);
+    hls.off(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+    hls.off(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+    hls.off(Events.FRAG_PARSED, this.onFragParsed, this);
+    hls.off(Events.FRAG_CHANGED, this.onFragChanged, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  transferMedia() {
+    const {
+      media,
+      mediaSource
+    } = this;
+    if (!media) {
+      return null;
+    }
+    const tracks = {};
+    if (this.operationQueue) {
+      const updating = this.isUpdating();
+      if (!updating) {
+        this.operationQueue.removeBlockers();
+      }
+      const queued = this.isQueued();
+      if (updating || queued) {
+        this.warn(`Transfering MediaSource with${queued ? ' operations in queue' : ''}${updating ? ' updating SourceBuffer(s)' : ''} ${this.operationQueue}`);
+      }
+      this.operationQueue.destroy();
+    }
+    const transferData = this.transferData;
+    if (!this.sourceBufferCount && transferData && transferData.mediaSource === mediaSource) {
+      _extends(tracks, transferData.tracks);
+    } else {
+      this.sourceBuffers.forEach(tuple => {
+        const [type] = tuple;
+        if (type) {
+          tracks[type] = _extends({}, this.tracks[type]);
+          this.removeBuffer(type);
+        }
+        tuple[0] = tuple[1] = null;
+      });
+    }
+    return {
+      media,
+      mediaSource,
+      tracks
+    };
+  }
+  initTracks() {
+    const tracks = {};
+    this.sourceBuffers = [[null, null], [null, null]];
+    this.tracks = tracks;
+    this.resetQueue();
+    this.resetAppendErrors();
+    this.lastMpegAudioChunk = this.blockedAudioAppend = null;
+    this.lastVideoAppendEnd = 0;
+  }
+  onManifestLoading() {
+    this.bufferCodecEventsTotal = 0;
+    this.details = null;
+  }
+  onManifestParsed(event, data) {
+    var _this$transferData;
+    // in case of alt audio 2 BUFFER_CODECS events will be triggered, one per stream controller
+    // sourcebuffers will be created all at once when the expected nb of tracks will be reached
+    // in case alt audio is not used, only one BUFFER_CODEC event will be fired from main stream controller
+    // it will contain the expected nb of source buffers, no need to compute it
+    let codecEvents = 2;
+    if (data.audio && !data.video || !data.altAudio) {
+      codecEvents = 1;
+    }
+    this.bufferCodecEventsTotal = codecEvents;
+    this.log(`${codecEvents} bufferCodec event(s) expected.`);
+    if ((_this$transferData = this.transferData) != null && _this$transferData.mediaSource && this.sourceBufferCount && codecEvents) {
+      this.bufferCreated();
+    }
+  }
+  onMediaAttaching(event, data) {
+    const media = this.media = data.media;
+    this.transferData = this.overrides = undefined;
+    const MediaSource = getMediaSource(this.appendSource);
+    if (MediaSource) {
+      const transferringMedia = !!data.mediaSource;
+      if (transferringMedia || data.overrides) {
+        this.transferData = data;
+        this.overrides = data.overrides;
+      }
+      const ms = this.mediaSource = data.mediaSource || new MediaSource();
+      this.assignMediaSource(ms);
+      if (transferringMedia) {
+        this._objectUrl = media.src;
+        this.attachTransferred();
+      } else {
+        // cache the locally generated object url
+        const objectUrl = this._objectUrl = self.URL.createObjectURL(ms);
+        // link video and media Source
+        if (this.appendSource) {
+          try {
+            media.removeAttribute('src');
+            // ManagedMediaSource will not open without disableRemotePlayback set to false or source alternatives
+            const MMS = self.ManagedMediaSource;
+            media.disableRemotePlayback = media.disableRemotePlayback || MMS && ms instanceof MMS;
+            removeSourceChildren(media);
+            addSource(media, objectUrl);
+            media.load();
+          } catch (error) {
+            media.src = objectUrl;
+          }
+        } else {
+          media.src = objectUrl;
+        }
+      }
+      media.addEventListener('emptied', this._onMediaEmptied);
+    }
+  }
+  assignMediaSource(ms) {
+    var _this$transferData2, _ms$constructor;
+    this.log(`${((_this$transferData2 = this.transferData) == null ? void 0 : _this$transferData2.mediaSource) === ms ? 'transferred' : 'created'} media source: ${(_ms$constructor = ms.constructor) == null ? void 0 : _ms$constructor.name}`);
+    // MediaSource listeners are arrow functions with a lexical scope, and do not need to be bound
+    ms.addEventListener('sourceopen', this._onMediaSourceOpen);
+    ms.addEventListener('sourceended', this._onMediaSourceEnded);
+    ms.addEventListener('sourceclose', this._onMediaSourceClose);
+    if (this.appendSource) {
+      ms.addEventListener('startstreaming', this._onStartStreaming);
+      ms.addEventListener('endstreaming', this._onEndStreaming);
+    }
+  }
+  attachTransferred() {
+    const media = this.media;
+    const data = this.transferData;
+    if (!data || !media) {
+      return;
+    }
+    const requiredTracks = this.tracks;
+    const transferredTracks = data.tracks;
+    const trackNames = transferredTracks ? Object.keys(transferredTracks) : null;
+    const trackCount = trackNames ? trackNames.length : 0;
+    const mediaSourceOpenCallback = () => {
+      // eslint-disable-next-line @typescript-eslint/no-floating-promises
+      Promise.resolve().then(() => {
+        if (this.media && this.mediaSourceOpenOrEnded) {
+          this._onMediaSourceOpen();
+        }
+      });
+    };
+    if (transferredTracks && trackNames && trackCount) {
+      if (!this.tracksReady) {
+        // Wait for CODECS event(s)
+        this.hls.config.startFragPrefetch = true;
+        this.log(`attachTransferred: waiting for SourceBuffer track info`);
+        return;
+      }
+      this.log(`attachTransferred: (bufferCodecEventsTotal ${this.bufferCodecEventsTotal})
+required tracks: ${stringify(requiredTracks, (key, value) => key === 'initSegment' ? undefined : value)};
+transfer tracks: ${stringify(transferredTracks, (key, value) => key === 'initSegment' ? undefined : value)}}`);
+      if (!isCompatibleTrackChange(transferredTracks, requiredTracks)) {
+        // destroy attaching media source
+        data.mediaSource = null;
+        data.tracks = undefined;
+        const currentTime = media.currentTime;
+        const details = this.details;
+        const startTime = Math.max(currentTime, (details == null ? void 0 : details.fragments[0].start) || 0);
+        if (startTime - currentTime > 1) {
+          this.log(`attachTransferred: waiting for playback to reach new tracks start time ${currentTime} -> ${startTime}`);
+          return;
+        }
+        this.warn(`attachTransferred: resetting MediaSource for incompatible tracks ("${Object.keys(transferredTracks)}"->"${Object.keys(requiredTracks)}") start time: ${startTime} currentTime: ${currentTime}`);
+        this.onMediaDetaching(Events.MEDIA_DETACHING, {});
+        this.onMediaAttaching(Events.MEDIA_ATTACHING, data);
+        media.currentTime = startTime;
+        return;
+      }
+      this.transferData = undefined;
+      trackNames.forEach(trackName => {
+        const type = trackName;
+        const track = transferredTracks[type];
+        if (track) {
+          const sb = track.buffer;
+          if (sb) {
+            // Purge fragment tracker of ejected segments for existing buffer
+            const fragmentTracker = this.fragmentTracker;
+            const playlistType = track.id;
+            if (fragmentTracker.hasFragments(playlistType) || fragmentTracker.hasParts(playlistType)) {
+              const bufferedTimeRanges = BufferHelper.getBuffered(sb);
+              fragmentTracker.detectEvictedFragments(type, bufferedTimeRanges, playlistType, null, true);
+            }
+            // Transfer SourceBuffer
+            const sbIndex = sourceBufferNameToIndex(type);
+            const sbTuple = [type, sb];
+            this.sourceBuffers[sbIndex] = sbTuple;
+            if (sb.updating && this.operationQueue) {
+              // eslint-disable-next-line @typescript-eslint/no-floating-promises
+              this.operationQueue.prependBlocker(type);
+            }
+            this.trackSourceBuffer(type, track);
+          }
+        }
+      });
+      mediaSourceOpenCallback();
+      this.bufferCreated();
+    } else {
+      this.log(`attachTransferred: MediaSource w/o SourceBuffers`);
+      mediaSourceOpenCallback();
+    }
+  }
+  get mediaSourceOpenOrEnded() {
+    var _this$mediaSource2;
+    const readyState = (_this$mediaSource2 = this.mediaSource) == null ? void 0 : _this$mediaSource2.readyState;
+    return readyState === 'open' || readyState === 'ended';
+  }
+  onMediaDetaching(event, data) {
+    const transferringMedia = !!data.transferMedia;
+    this.transferData = this.overrides = undefined;
+    const {
+      media,
+      mediaSource,
+      _objectUrl
+    } = this;
+    if (mediaSource) {
+      this.log(`media source ${transferringMedia ? 'transferring' : 'detaching'}`);
+      if (transferringMedia) {
+        // Detach SourceBuffers without removing from MediaSource
+        // and leave `tracks` (required SourceBuffers configuration)
+        this.sourceBuffers.forEach(([type]) => {
+          if (type) {
+            this.removeBuffer(type);
+          }
+        });
+        this.resetQueue();
+      } else {
+        if (this.mediaSourceOpenOrEnded) {
+          const open = mediaSource.readyState === 'open';
+          try {
+            const sourceBuffers = mediaSource.sourceBuffers;
+            for (let i = sourceBuffers.length; i--;) {
+              if (open) {
+                sourceBuffers[i].abort();
+              }
+              mediaSource.removeSourceBuffer(sourceBuffers[i]);
+            }
+            if (open) {
+              // endOfStream could trigger exception if any sourcebuffer is in updating state
+              // we don't really care about checking sourcebuffer state here,
+              // as we are anyway detaching the MediaSource
+              // let's just avoid this exception to propagate
+              mediaSource.endOfStream();
+            }
+          } catch (err) {
+            this.warn(`onMediaDetaching: ${err.message} while calling endOfStream`);
+          }
+        }
+        // Clean up the SourceBuffers by invoking onBufferReset
+        if (this.sourceBufferCount) {
+          this.onBufferReset();
+        }
+      }
+      mediaSource.removeEventListener('sourceopen', this._onMediaSourceOpen);
+      mediaSource.removeEventListener('sourceended', this._onMediaSourceEnded);
+      mediaSource.removeEventListener('sourceclose', this._onMediaSourceClose);
+      if (this.appendSource) {
+        mediaSource.removeEventListener('startstreaming', this._onStartStreaming);
+        mediaSource.removeEventListener('endstreaming', this._onEndStreaming);
+      }
+      this.mediaSource = null;
+      this._objectUrl = null;
+    }
+
+    // Detach properly the MediaSource from the HTMLMediaElement as
+    // suggested in https://github.com/w3c/media-source/issues/53.
+    if (media) {
+      media.removeEventListener('emptied', this._onMediaEmptied);
+      if (!transferringMedia) {
+        if (_objectUrl) {
+          self.URL.revokeObjectURL(_objectUrl);
+        }
+
+        // clean up video tag src only if it's our own url. some external libraries might
+        // hijack the video tag and change its 'src' without destroying the Hls instance first
+        if (this.mediaSrc === _objectUrl) {
+          media.removeAttribute('src');
+          if (this.appendSource) {
+            removeSourceChildren(media);
+          }
+          media.load();
+        } else {
+          this.warn('media|source.src was changed by a third party - skip cleanup');
+        }
+      }
+      this.media = null;
+    }
+    this.hls.trigger(Events.MEDIA_DETACHED, data);
+  }
+  onBufferReset() {
+    this.sourceBuffers.forEach(([type]) => {
+      if (type) {
+        this.resetBuffer(type);
+      }
+    });
+    this.initTracks();
+  }
+  resetBuffer(type) {
+    var _this$tracks$type;
+    const sb = (_this$tracks$type = this.tracks[type]) == null ? void 0 : _this$tracks$type.buffer;
+    this.removeBuffer(type);
+    if (sb) {
+      try {
+        var _this$mediaSource3;
+        if ((_this$mediaSource3 = this.mediaSource) != null && _this$mediaSource3.sourceBuffers.length) {
+          this.mediaSource.removeSourceBuffer(sb);
+        }
+      } catch (err) {
+        this.warn(`onBufferReset ${type}`, err);
+      }
+    }
+    delete this.tracks[type];
+  }
+  removeBuffer(type) {
+    this.removeBufferListeners(type);
+    this.sourceBuffers[sourceBufferNameToIndex(type)] = [null, null];
+    const track = this.tracks[type];
+    if (track) {
+      track.buffer = undefined;
+    }
+  }
+  resetQueue() {
+    if (this.operationQueue) {
+      this.operationQueue.destroy();
+    }
+    this.operationQueue = new BufferOperationQueue(this.tracks);
+  }
+  onBufferCodecs(event, data) {
+    var _data$audio;
+    const tracks = this.tracks;
+    const trackNames = Object.keys(data);
+    this.log(`BUFFER_CODECS: "${trackNames}" (current SB count ${this.sourceBufferCount})`);
+    const unmuxedToMuxed = 'audiovideo' in data && (tracks.audio || tracks.video) || tracks.audiovideo && ('audio' in data || 'video' in data);
+    const muxedToUnmuxed = !unmuxedToMuxed && this.sourceBufferCount && this.media && trackNames.some(sbName => !tracks[sbName]);
+    if (unmuxedToMuxed || muxedToUnmuxed) {
+      this.warn(`Unsupported transition between "${Object.keys(tracks)}" and "${trackNames}" SourceBuffers`);
+      // Do not add incompatible track ('audiovideo' <-> 'video'/'audio').
+      // Allow following onBufferAppending handle to trigger BUFFER_APPEND_ERROR.
+      // This will either be resolved by level switch or could be handled with recoverMediaError().
+      return;
+    }
+    trackNames.forEach(trackName => {
+      var _this$transferData3, _trackCodec;
+      const parsedTrack = data[trackName];
+      const {
+        id,
+        codec,
+        levelCodec,
+        container,
+        metadata,
+        supplemental
+      } = parsedTrack;
+      let track = tracks[trackName];
+      const transferredTrack = (_this$transferData3 = this.transferData) == null || (_this$transferData3 = _this$transferData3.tracks) == null ? void 0 : _this$transferData3[trackName];
+      const sbTrack = transferredTrack != null && transferredTrack.buffer ? transferredTrack : track;
+      const sbCodec = (sbTrack == null ? void 0 : sbTrack.pendingCodec) || (sbTrack == null ? void 0 : sbTrack.codec);
+      const trackLevelCodec = sbTrack == null ? void 0 : sbTrack.levelCodec;
+      if (!track) {
+        track = tracks[trackName] = {
+          buffer: undefined,
+          listeners: [],
+          codec,
+          supplemental,
+          container,
+          levelCodec,
+          metadata,
+          id
+        };
+      }
+      // check if SourceBuffer codec needs to change
+      const currentCodecFull = pickMostCompleteCodecName(sbCodec, trackLevelCodec);
+      const currentCodec = currentCodecFull == null ? void 0 : currentCodecFull.replace(VIDEO_CODEC_PROFILE_REPLACE, '$1');
+      let trackCodec = pickMostCompleteCodecName(codec, levelCodec);
+      const nextCodec = (_trackCodec = trackCodec) == null ? void 0 : _trackCodec.replace(VIDEO_CODEC_PROFILE_REPLACE, '$1');
+      if (trackCodec && currentCodecFull && currentCodec !== nextCodec) {
+        if (trackName.slice(0, 5) === 'audio') {
+          trackCodec = getCodecCompatibleName(trackCodec, this.appendSource);
+        }
+        this.log(`switching codec ${sbCodec} to ${trackCodec}`);
+        if (trackCodec !== (track.pendingCodec || track.codec)) {
+          track.pendingCodec = trackCodec;
+        }
+        track.container = container;
+        this.appendChangeType(trackName, container, trackCodec);
+      }
+    });
+    if (this.tracksReady || this.sourceBufferCount) {
+      data.tracks = this.sourceBufferTracks;
+    }
+
+    // if sourcebuffers already created, do nothing ...
+    if (this.sourceBufferCount) {
+      return;
+    }
+    if (this.bufferCodecEventsTotal > 1 && !this.tracks.video && !data.video && ((_data$audio = data.audio) == null ? void 0 : _data$audio.id) === 'main') {
+      // MVP is missing CODECS and only audio was found in main segment (#7524)
+      this.log(`Main audio-only`);
+      this.bufferCodecEventsTotal = 1;
+    }
+    if (this.mediaSourceOpenOrEnded) {
+      this.checkPendingTracks();
+    }
+  }
+  get sourceBufferTracks() {
+    return Object.keys(this.tracks).reduce((baseTracks, type) => {
+      const track = this.tracks[type];
+      baseTracks[type] = {
+        id: track.id,
+        container: track.container,
+        codec: track.codec,
+        levelCodec: track.levelCodec
+      };
+      return baseTracks;
+    }, {});
+  }
+  appendChangeType(type, container, codec) {
+    const mimeType = `${container};codecs=${codec}`;
+    const operation = {
+      label: `change-type=${mimeType}`,
+      execute: () => {
+        const track = this.tracks[type];
+        if (track) {
+          const sb = track.buffer;
+          if (sb != null && sb.changeType) {
+            this.log(`changing ${type} sourceBuffer type to ${mimeType}`);
+            sb.changeType(mimeType);
+            track.codec = codec;
+            track.container = container;
+          }
+        }
+        this.shiftAndExecuteNext(type);
+      },
+      onStart: () => {},
+      onComplete: () => {},
+      onError: error => {
+        this.warn(`Failed to change ${type} SourceBuffer type`, error);
+      }
+    };
+    this.append(operation, type, this.isPending(this.tracks[type]));
+  }
+  blockAudio(partOrFrag) {
+    var _this$fragmentTracker;
+    const pStart = partOrFrag.start;
+    const pTime = pStart + partOrFrag.duration * 0.05;
+    const atGap = ((_this$fragmentTracker = this.fragmentTracker.getAppendedFrag(pStart, PlaylistLevelType.MAIN)) == null ? void 0 : _this$fragmentTracker.gap) === true;
+    if (atGap) {
+      return;
+    }
+    const op = {
+      label: 'block-audio',
+      execute: () => {
+        var _this$fragmentTracker2;
+        const videoTrack = this.tracks.video;
+        if (this.lastVideoAppendEnd > pTime || videoTrack != null && videoTrack.buffer && BufferHelper.isBuffered(videoTrack.buffer, pTime) || ((_this$fragmentTracker2 = this.fragmentTracker.getAppendedFrag(pTime, PlaylistLevelType.MAIN)) == null ? void 0 : _this$fragmentTracker2.gap) === true) {
+          this.blockedAudioAppend = null;
+          this.shiftAndExecuteNext('audio');
+        }
+      },
+      onStart: () => {},
+      onComplete: () => {},
+      onError: error => {
+        this.warn('Error executing block-audio operation', error);
+      }
+    };
+    this.blockedAudioAppend = {
+      op,
+      frag: partOrFrag
+    };
+    this.append(op, 'audio', true);
+  }
+  unblockAudio() {
+    const {
+      blockedAudioAppend,
+      operationQueue
+    } = this;
+    if (blockedAudioAppend && operationQueue) {
+      this.blockedAudioAppend = null;
+      operationQueue.unblockAudio(blockedAudioAppend.op);
+    }
+  }
+  onBufferAppending(event, eventData) {
+    const {
+      tracks
+    } = this;
+    const {
+      data,
+      type,
+      parent,
+      frag,
+      part,
+      chunkMeta,
+      offset
+    } = eventData;
+    const chunkStats = chunkMeta.buffering[type];
+    const {
+      sn,
+      cc
+    } = frag;
+    const bufferAppendingStart = self.performance.now();
+    chunkStats.start = bufferAppendingStart;
+    const fragBuffering = frag.stats.buffering;
+    const partBuffering = part ? part.stats.buffering : null;
+    if (fragBuffering.start === 0) {
+      fragBuffering.start = bufferAppendingStart;
+    }
+    if (partBuffering && partBuffering.start === 0) {
+      partBuffering.start = bufferAppendingStart;
+    }
+
+    // TODO: Only update timestampOffset when audio/mpeg fragment or part is not contiguous with previously appended
+    // Adjusting `SourceBuffer.timestampOffset` (desired point in the timeline where the next frames should be appended)
+    // in Chrome browser when we detect MPEG audio container and time delta between level PTS and `SourceBuffer.timestampOffset`
+    // is greater than 100ms (this is enough to handle seek for VOD or level change for LIVE videos).
+    // More info here: https://github.com/video-dev/hls.js/issues/332#issuecomment-257986486
+    const audioTrack = tracks.audio;
+    let checkTimestampOffset = false;
+    if (type === 'audio' && (audioTrack == null ? void 0 : audioTrack.container) === 'audio/mpeg') {
+      checkTimestampOffset = !this.lastMpegAudioChunk || chunkMeta.id === 1 || this.lastMpegAudioChunk.sn !== chunkMeta.sn;
+      this.lastMpegAudioChunk = chunkMeta;
+    }
+
+    // Block audio append until overlapping video append
+    const videoTrack = tracks.video;
+    const videoSb = videoTrack == null ? void 0 : videoTrack.buffer;
+    if (videoSb && sn !== 'initSegment') {
+      const partOrFrag = part || frag;
+      const blockedAudioAppend = this.blockedAudioAppend;
+      if (type === 'audio' && parent !== 'main' && !this.blockedAudioAppend && !(videoTrack.ending || videoTrack.ended)) {
+        const pStart = partOrFrag.start;
+        const pTime = pStart + partOrFrag.duration * 0.05;
+        const vbuffered = videoSb.buffered;
+        const vappending = this.currentOp('video');
+        if (!vbuffered.length && !vappending) {
+          // wait for video before appending audio
+          this.blockAudio(partOrFrag);
+        } else if (!vappending && !BufferHelper.isBuffered(videoSb, pTime) && this.lastVideoAppendEnd < pTime) {
+          // audio is ahead of video
+          this.blockAudio(partOrFrag);
+        }
+      } else if (type === 'video') {
+        const videoAppendEnd = partOrFrag.end;
+        if (blockedAudioAppend) {
+          const audioStart = blockedAudioAppend.frag.start;
+          if (videoAppendEnd > audioStart || videoAppendEnd < this.lastVideoAppendEnd || BufferHelper.isBuffered(videoSb, audioStart)) {
+            this.unblockAudio();
+          }
+        }
+        this.lastVideoAppendEnd = videoAppendEnd;
+      }
+    }
+    const fragStart = (part || frag).start;
+    const operation = {
+      label: `append-${type}`,
+      execute: () => {
+        var _this$tracks$type2;
+        chunkStats.executeStart = self.performance.now();
+        const sb = (_this$tracks$type2 = this.tracks[type]) == null ? void 0 : _this$tracks$type2.buffer;
+        if (sb) {
+          if (checkTimestampOffset) {
+            this.updateTimestampOffset(sb, fragStart, 0.1, type, sn, cc);
+          } else if (offset !== undefined && isFiniteNumber(offset)) {
+            this.updateTimestampOffset(sb, offset, 0.000001, type, sn, cc);
+          }
+        }
+        this.appendExecutor(data, type);
+      },
+      onStart: () => {
+        // logger.debug(`[buffer-controller]: ${type} SourceBuffer updatestart`);
+      },
+      onComplete: () => {
+        // logger.debug(`[buffer-controller]: ${type} SourceBuffer updateend`);
+        const end = self.performance.now();
+        chunkStats.executeEnd = chunkStats.end = end;
+        if (fragBuffering.first === 0) {
+          fragBuffering.first = end;
+        }
+        if (partBuffering && partBuffering.first === 0) {
+          partBuffering.first = end;
+        }
+        const timeRanges = {};
+        this.sourceBuffers.forEach(([type, sb]) => {
+          if (type) {
+            timeRanges[type] = BufferHelper.getBuffered(sb);
+          }
+        });
+        this.appendErrors[type] = 0;
+        if (type === 'audio' || type === 'video') {
+          this.appendErrors.audiovideo = 0;
+        } else {
+          this.appendErrors.audio = 0;
+          this.appendErrors.video = 0;
+        }
+        this.hls.trigger(Events.BUFFER_APPENDED, {
+          type,
+          frag,
+          part,
+          chunkMeta,
+          parent: frag.type,
+          timeRanges
+        });
+      },
+      onError: error => {
+        var _this$media;
+        // in case any error occured while appending, put back segment in segments table
+        const event = {
+          type: ErrorTypes.MEDIA_ERROR,
+          parent: frag.type,
+          details: ErrorDetails.BUFFER_APPEND_ERROR,
+          sourceBufferName: type,
+          frag,
+          part,
+          chunkMeta,
+          error,
+          err: error,
+          fatal: false
+        };
+        const mediaError = (_this$media = this.media) == null ? void 0 : _this$media.error;
+        if (error.code === DOMException.QUOTA_EXCEEDED_ERR || error.name == 'QuotaExceededError' || `quota` in error) {
+          // QuotaExceededError: http://www.w3.org/TR/html5/infrastructure.html#quotaexceedederror
+          // let's stop appending any segments, and report BUFFER_FULL_ERROR error
+          event.details = ErrorDetails.BUFFER_FULL_ERROR;
+        } else if (error.code === DOMException.INVALID_STATE_ERR && this.mediaSourceOpenOrEnded && !mediaError) {
+          // Allow retry for "Failed to execute 'appendBuffer' on 'SourceBuffer': This SourceBuffer is still processing" errors
+          event.errorAction = createDoNothingErrorAction(true);
+        } else if (error.name === TRACK_REMOVED_ERROR_NAME && this.sourceBufferCount === 0) {
+          // Do nothing if sourceBuffers were removed (media is detached and append was not aborted)
+          event.errorAction = createDoNothingErrorAction(true);
+        } else {
+          const appendErrorCount = ++this.appendErrors[type];
+          /* with UHD content, we could get loop of quota exceeded error until
+            browser is able to evict some data from sourcebuffer. Retrying can help recover.
+          */
+          this.warn(`Failed ${appendErrorCount}/${this.hls.config.appendErrorMaxRetry} times to append segment in "${type}" sourceBuffer (${mediaError ? mediaError : 'no media error'})`);
+          if (appendErrorCount >= this.hls.config.appendErrorMaxRetry || !!mediaError) {
+            event.fatal = true;
+          }
+        }
+        this.hls.trigger(Events.ERROR, event);
+      }
+    };
+    this.log(`queuing "${type}" append sn: ${sn}${part ? ' p: ' + part.index : ''} of ${frag.type === PlaylistLevelType.MAIN ? 'level' : 'track'} ${frag.level} cc: ${cc}`);
+    this.append(operation, type, this.isPending(this.tracks[type]));
+  }
+  getFlushOp(type, start, end) {
+    this.log(`queuing "${type}" remove ${start}-${end}`);
+    return {
+      label: 'remove',
+      execute: () => {
+        this.removeExecutor(type, start, end);
+      },
+      onStart: () => {
+        // logger.debug(`[buffer-controller]: Started flushing ${data.startOffset} -> ${data.endOffset} for ${type} Source Buffer`);
+      },
+      onComplete: () => {
+        // logger.debug(`[buffer-controller]: Finished flushing ${data.startOffset} -> ${data.endOffset} for ${type} Source Buffer`);
+        this.hls.trigger(Events.BUFFER_FLUSHED, {
+          type
+        });
+      },
+      onError: error => {
+        this.warn(`Failed to remove ${start}-${end} from "${type}" SourceBuffer`, error);
+      }
+    };
+  }
+  onBufferFlushing(event, data) {
+    const {
+      type,
+      startOffset,
+      endOffset
+    } = data;
+    if (type) {
+      this.append(this.getFlushOp(type, startOffset, endOffset), type);
+    } else {
+      this.sourceBuffers.forEach(([type]) => {
+        if (type) {
+          this.append(this.getFlushOp(type, startOffset, endOffset), type);
+        }
+      });
+    }
+  }
+  onFragParsed(event, data) {
+    const {
+      frag,
+      part
+    } = data;
+    const buffersAppendedTo = [];
+    const elementaryStreams = part ? part.elementaryStreams : frag.elementaryStreams;
+    if (elementaryStreams[ElementaryStreamTypes.AUDIOVIDEO]) {
+      buffersAppendedTo.push('audiovideo');
+    } else {
+      if (elementaryStreams[ElementaryStreamTypes.AUDIO]) {
+        buffersAppendedTo.push('audio');
+      }
+      if (elementaryStreams[ElementaryStreamTypes.VIDEO]) {
+        buffersAppendedTo.push('video');
+      }
+    }
+    const onUnblocked = () => {
+      const now = self.performance.now();
+      frag.stats.buffering.end = now;
+      if (part) {
+        part.stats.buffering.end = now;
+      }
+      const stats = part ? part.stats : frag.stats;
+      this.hls.trigger(Events.FRAG_BUFFERED, {
+        frag,
+        part,
+        stats,
+        id: frag.type
+      });
+    };
+    if (buffersAppendedTo.length === 0) {
+      this.warn(`Fragments must have at least one ElementaryStreamType set. type: ${frag.type} level: ${frag.level} sn: ${frag.sn}`);
+    }
+    this.blockBuffers(onUnblocked, buffersAppendedTo).catch(error => {
+      this.warn(`Fragment buffered callback ${error}`);
+      this.stepOperationQueue(this.sourceBufferTypes);
+    });
+  }
+  onFragChanged(event, data) {
+    this.trimBuffers();
+  }
+  get bufferedToEnd() {
+    return this.sourceBufferCount > 0 && !this.sourceBuffers.some(([type]) => {
+      if (type) {
+        const track = this.tracks[type];
+        if (track) {
+          return !track.ended || track.ending;
+        }
+      }
+      return false;
+    });
+  }
+
+  // on BUFFER_EOS mark matching sourcebuffer(s) as "ending" and "ended" and queue endOfStream after remaining operations(s)
+  // an undefined data.type will mark all buffers as EOS.
+  onBufferEos(event, data) {
+    var _this$overrides;
+    this.sourceBuffers.forEach(([type]) => {
+      if (type) {
+        const track = this.tracks[type];
+        if (!data.type || data.type === type) {
+          track.ending = true;
+          if (!track.ended) {
+            track.ended = true;
+            this.log(`${type} buffer reached EOS`);
+          }
+        }
+      }
+    });
+    const allowEndOfStream = ((_this$overrides = this.overrides) == null ? void 0 : _this$overrides.endOfStream) !== false;
+    const allTracksEnding = this.sourceBufferCount > 0 && !this.sourceBuffers.some(([type]) => {
+      var _this$tracks$type3;
+      return type && !((_this$tracks$type3 = this.tracks[type]) != null && _this$tracks$type3.ended);
+    });
+    if (allTracksEnding) {
+      if (allowEndOfStream) {
+        this.log(`Queueing EOS`);
+        this.blockUntilOpen(() => {
+          this.tracksEnded();
+          const {
+            mediaSource
+          } = this;
+          if (!mediaSource || mediaSource.readyState !== 'open') {
+            if (mediaSource) {
+              this.log(`Could not call mediaSource.endOfStream(). mediaSource.readyState: ${mediaSource.readyState}`);
+            }
+            return;
+          }
+          this.log(`Calling mediaSource.endOfStream()`);
+          // Allow this to throw and be caught by the enqueueing function
+          mediaSource.endOfStream();
+          this.hls.trigger(Events.BUFFERED_TO_END, undefined);
+        });
+      } else {
+        this.tracksEnded();
+        this.hls.trigger(Events.BUFFERED_TO_END, undefined);
+      }
+    } else if (data.type === 'video') {
+      // Make sure pending audio appends are unblocked when video reaches end
+      this.unblockAudio();
+    }
+  }
+  tracksEnded() {
+    this.sourceBuffers.forEach(([type]) => {
+      if (type !== null) {
+        const track = this.tracks[type];
+        if (track) {
+          track.ending = false;
+        }
+      }
+    });
+  }
+  onLevelUpdated(event, {
+    details
+  }) {
+    if (!details.fragments.length) {
+      return;
+    }
+    this.details = details;
+    this.updateDuration();
+  }
+  updateDuration() {
+    this.blockUntilOpen(() => {
+      const durationAndRange = this.getDurationAndRange();
+      if (!durationAndRange) {
+        return;
+      }
+      this.updateMediaSource(durationAndRange);
+    });
+  }
+  onError(event, data) {
+    if (data.details === ErrorDetails.BUFFER_APPEND_ERROR && data.frag) {
+      var _data$errorAction;
+      const nextAutoLevel = (_data$errorAction = data.errorAction) == null ? void 0 : _data$errorAction.nextAutoLevel;
+      if (isFiniteNumber(nextAutoLevel) && nextAutoLevel !== data.frag.level) {
+        this.resetAppendErrors();
+      }
+    }
+  }
+  resetAppendErrors() {
+    this.appendErrors = {
+      audio: 0,
+      video: 0,
+      audiovideo: 0
+    };
+  }
+  trimBuffers() {
+    const {
+      hls,
+      details,
+      media
+    } = this;
+    if (!media || details === null) {
+      return;
+    }
+    if (!this.sourceBufferCount) {
+      return;
+    }
+    const config = hls.config;
+    const currentTime = media.currentTime;
+    const targetDuration = details.levelTargetDuration;
+
+    // Support for deprecated liveBackBufferLength
+    const backBufferLength = details.live && config.liveBackBufferLength !== null ? config.liveBackBufferLength : config.backBufferLength;
+    if (isFiniteNumber(backBufferLength) && backBufferLength >= 0) {
+      const maxBackBufferLength = Math.max(backBufferLength, targetDuration);
+      const targetBackBufferPosition = Math.floor(currentTime / targetDuration) * targetDuration - maxBackBufferLength;
+      this.flushBackBuffer(currentTime, targetDuration, targetBackBufferPosition);
+    }
+    const frontBufferFlushThreshold = config.frontBufferFlushThreshold;
+    if (isFiniteNumber(frontBufferFlushThreshold) && frontBufferFlushThreshold > 0) {
+      const frontBufferLength = Math.max(config.maxBufferLength, frontBufferFlushThreshold);
+      const maxFrontBufferLength = Math.max(frontBufferLength, targetDuration);
+      const targetFrontBufferPosition = Math.floor(currentTime / targetDuration) * targetDuration + maxFrontBufferLength;
+      this.flushFrontBuffer(currentTime, targetDuration, targetFrontBufferPosition);
+    }
+  }
+  flushBackBuffer(currentTime, targetDuration, targetBackBufferPosition) {
+    this.sourceBuffers.forEach(([type, sb]) => {
+      if (sb) {
+        const buffered = BufferHelper.getBuffered(sb);
+        // when target buffer start exceeds actual buffer start
+        if (buffered.length > 0 && targetBackBufferPosition > buffered.start(0)) {
+          var _this$details;
+          this.hls.trigger(Events.BACK_BUFFER_REACHED, {
+            bufferEnd: targetBackBufferPosition
+          });
+
+          // Support for deprecated event:
+          const track = this.tracks[type];
+          if ((_this$details = this.details) != null && _this$details.live) {
+            this.hls.trigger(Events.LIVE_BACK_BUFFER_REACHED, {
+              bufferEnd: targetBackBufferPosition
+            });
+          } else if (track != null && track.ended) {
+            this.log(`Cannot flush ${type} back buffer while SourceBuffer is in ended state`);
+            return;
+          }
+          this.hls.trigger(Events.BUFFER_FLUSHING, {
+            startOffset: 0,
+            endOffset: targetBackBufferPosition,
+            type
+          });
+        }
+      }
+    });
+  }
+  flushFrontBuffer(currentTime, targetDuration, targetFrontBufferPosition) {
+    this.sourceBuffers.forEach(([type, sb]) => {
+      if (sb) {
+        const buffered = BufferHelper.getBuffered(sb);
+        const numBufferedRanges = buffered.length;
+        // The buffer is either empty or contiguous
+        if (numBufferedRanges < 2) {
+          return;
+        }
+        const bufferStart = buffered.start(numBufferedRanges - 1);
+        const bufferEnd = buffered.end(numBufferedRanges - 1);
+        // No flush if we can tolerate the current buffer length or the current buffer range we would flush is contiguous with current position
+        if (targetFrontBufferPosition > bufferStart || currentTime >= bufferStart && currentTime <= bufferEnd) {
+          return;
+        }
+        this.hls.trigger(Events.BUFFER_FLUSHING, {
+          startOffset: bufferStart,
+          endOffset: Infinity,
+          type
+        });
+      }
+    });
+  }
+
+  /**
+   * Update Media Source duration to current level duration or override to Infinity if configuration parameter
+   * 'liveDurationInfinity` is set to `true`
+   * More details: https://github.com/video-dev/hls.js/issues/355
+   */
+  getDurationAndRange() {
+    var _this$overrides2;
+    const {
+      details,
+      mediaSource
+    } = this;
+    if (!details || !this.media || (mediaSource == null ? void 0 : mediaSource.readyState) !== 'open') {
+      return null;
+    }
+    const playlistEnd = details.edge;
+    if (details.live && this.hls.config.liveDurationInfinity) {
+      const len = details.fragments.length;
+      if (len && !!mediaSource.setLiveSeekableRange) {
+        const start = Math.max(0, details.fragmentStart);
+        const end = Math.max(start, playlistEnd);
+        return {
+          duration: Infinity,
+          start,
+          end
+        };
+      }
+      return {
+        duration: Infinity
+      };
+    }
+    const overrideDuration = (_this$overrides2 = this.overrides) == null ? void 0 : _this$overrides2.duration;
+    if (overrideDuration) {
+      if (!isFiniteNumber(overrideDuration)) {
+        return null;
+      }
+      return {
+        duration: overrideDuration
+      };
+    }
+    const mediaDuration = this.media.duration;
+    const msDuration = isFiniteNumber(mediaSource.duration) ? mediaSource.duration : 0;
+    if (playlistEnd > msDuration && playlistEnd > mediaDuration || !isFiniteNumber(mediaDuration)) {
+      return {
+        duration: playlistEnd
+      };
+    }
+    return null;
+  }
+  updateMediaSource({
+    duration,
+    start,
+    end
+  }) {
+    const mediaSource = this.mediaSource;
+    if (!this.media || !mediaSource || mediaSource.readyState !== 'open') {
+      return;
+    }
+    if (mediaSource.duration !== duration) {
+      if (isFiniteNumber(duration)) {
+        this.log(`Updating MediaSource duration to ${duration.toFixed(3)}`);
+      }
+      mediaSource.duration = duration;
+    }
+    if (start !== undefined && end !== undefined) {
+      this.log(`MediaSource duration is set to ${mediaSource.duration}. Setting seekable range to ${start}-${end}.`);
+      mediaSource.setLiveSeekableRange(start, end);
+    }
+  }
+  get tracksReady() {
+    const pendingTrackCount = this.pendingTrackCount;
+    return pendingTrackCount > 0 && (pendingTrackCount >= this.bufferCodecEventsTotal || this.isPending(this.tracks.audiovideo));
+  }
+  checkPendingTracks() {
+    const {
+      bufferCodecEventsTotal,
+      pendingTrackCount,
+      tracks
+    } = this;
+    this.log(`checkPendingTracks (pending: ${pendingTrackCount} codec events expected: ${bufferCodecEventsTotal}) ${stringify(tracks)}`);
+    // Check if we've received all of the expected bufferCodec events. When none remain, create all the sourceBuffers at once.
+    // This is important because the MSE spec allows implementations to throw QuotaExceededErrors if creating new sourceBuffers after
+    // data has been appended to existing ones.
+    // 2 tracks is the max (one for audio, one for video). If we've reach this max go ahead and create the buffers.
+    if (this.tracksReady) {
+      var _this$transferData4;
+      const transferredTracks = (_this$transferData4 = this.transferData) == null ? void 0 : _this$transferData4.tracks;
+      if (transferredTracks && Object.keys(transferredTracks).length) {
+        this.attachTransferred();
+      } else {
+        // ok, let's create them now !
+        this.createSourceBuffers();
+      }
+    }
+  }
+  bufferCreated() {
+    if (this.sourceBufferCount) {
+      const tracks = {};
+      this.sourceBuffers.forEach(([type, buffer]) => {
+        if (type) {
+          const track = this.tracks[type];
+          tracks[type] = {
+            buffer,
+            container: track.container,
+            codec: track.codec,
+            supplemental: track.supplemental,
+            levelCodec: track.levelCodec,
+            id: track.id,
+            metadata: track.metadata
+          };
+        }
+      });
+      this.hls.trigger(Events.BUFFER_CREATED, {
+        tracks
+      });
+      this.log(`SourceBuffers created. Running queue: ${this.operationQueue}`);
+      this.sourceBuffers.forEach(([type]) => {
+        this.executeNext(type);
+      });
+    } else {
+      const error = new Error('could not create source buffer for media codec(s)');
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.MEDIA_ERROR,
+        details: ErrorDetails.BUFFER_INCOMPATIBLE_CODECS_ERROR,
+        fatal: true,
+        error,
+        reason: error.message
+      });
+    }
+  }
+  createSourceBuffers() {
+    const {
+      tracks,
+      sourceBuffers,
+      mediaSource
+    } = this;
+    if (!mediaSource) {
+      throw new Error('createSourceBuffers called when mediaSource was null');
+    }
+    for (const trackName in tracks) {
+      const type = trackName;
+      const track = tracks[type];
+      if (this.isPending(track)) {
+        const codec = this.getTrackCodec(track, type);
+        const mimeType = `${track.container};codecs=${codec}`;
+        track.codec = codec;
+        this.log(`creating sourceBuffer(${mimeType})${this.currentOp(type) ? ' Queued' : ''} ${stringify(track)}`);
+        try {
+          const sb = mediaSource.addSourceBuffer(mimeType);
+          const sbIndex = sourceBufferNameToIndex(type);
+          const sbTuple = [type, sb];
+          sourceBuffers[sbIndex] = sbTuple;
+          track.buffer = sb;
+        } catch (error) {
+          var _this$operationQueue;
+          this.error(`error while trying to add sourceBuffer: ${error.message}`);
+          // remove init segment from queue and delete track info
+          this.shiftAndExecuteNext(type);
+          (_this$operationQueue = this.operationQueue) == null || _this$operationQueue.removeBlockers();
+          delete this.tracks[type];
+          this.hls.trigger(Events.ERROR, {
+            type: ErrorTypes.MEDIA_ERROR,
+            details: ErrorDetails.BUFFER_ADD_CODEC_ERROR,
+            fatal: false,
+            error,
+            sourceBufferName: type,
+            mimeType: mimeType,
+            parent: track.id
+          });
+          return;
+        }
+        this.trackSourceBuffer(type, track);
+      }
+    }
+    this.bufferCreated();
+  }
+  getTrackCodec(track, trackName) {
+    // Use supplemental video codec when supported when adding SourceBuffer (#5558)
+    const supplementalCodec = track.supplemental;
+    let trackCodec = track.codec;
+    if (supplementalCodec && (trackName === 'video' || trackName === 'audiovideo') && areCodecsMediaSourceSupported(supplementalCodec, 'video')) {
+      trackCodec = replaceVideoCodec(trackCodec, supplementalCodec);
+    }
+    const codec = pickMostCompleteCodecName(trackCodec, track.levelCodec);
+    if (codec) {
+      if (trackName.slice(0, 5) === 'audio') {
+        return getCodecCompatibleName(codec, this.appendSource);
+      }
+      return codec;
+    }
+    return '';
+  }
+  trackSourceBuffer(type, track) {
+    const buffer = track.buffer;
+    if (!buffer) {
+      return;
+    }
+    const codec = this.getTrackCodec(track, type);
+    this.tracks[type] = {
+      buffer,
+      codec,
+      container: track.container,
+      levelCodec: track.levelCodec,
+      supplemental: track.supplemental,
+      metadata: track.metadata,
+      id: track.id,
+      listeners: []
+    };
+    this.removeBufferListeners(type);
+    this.addBufferListener(type, 'updatestart', this.onSBUpdateStart);
+    this.addBufferListener(type, 'updateend', this.onSBUpdateEnd);
+    this.addBufferListener(type, 'error', this.onSBUpdateError);
+    // ManagedSourceBuffer bufferedchange event
+    if (this.appendSource) {
+      this.addBufferListener(type, 'bufferedchange', (type, event) => {
+        // If media was ejected check for a change. Added ranges are redundant with changes on 'updateend' event.
+        const removedRanges = event.removedRanges;
+        if (removedRanges != null && removedRanges.length) {
+          this.hls.trigger(Events.BUFFER_FLUSHED, {
+            type: type
+          });
+        }
+      });
+    }
+  }
+  get mediaSrc() {
+    var _this$media2, _this$media2$querySel;
+    const media = ((_this$media2 = this.media) == null || (_this$media2$querySel = _this$media2.querySelector) == null ? void 0 : _this$media2$querySel.call(_this$media2, 'source')) || this.media;
+    return media == null ? void 0 : media.src;
+  }
+  onSBUpdateStart(type) {
+    const operation = this.currentOp(type);
+    if (!operation) {
+      return;
+    }
+    operation.onStart();
+  }
+  onSBUpdateEnd(type) {
+    var _this$mediaSource4;
+    if (((_this$mediaSource4 = this.mediaSource) == null ? void 0 : _this$mediaSource4.readyState) === 'closed') {
+      this.resetBuffer(type);
+      return;
+    }
+    const operation = this.currentOp(type);
+    if (!operation) {
+      return;
+    }
+    operation.onComplete();
+    this.shiftAndExecuteNext(type);
+  }
+  onSBUpdateError(type, event) {
+    var _this$mediaSource5;
+    const error = new Error(`${type} SourceBuffer error. MediaSource readyState: ${(_this$mediaSource5 = this.mediaSource) == null ? void 0 : _this$mediaSource5.readyState}`);
+    this.error(`${error}`, event);
+    // according to http://www.w3.org/TR/media-source/#sourcebuffer-append-error
+    // SourceBuffer errors are not necessarily fatal; if so, the HTMLMediaElement will fire an error event
+    this.hls.trigger(Events.ERROR, {
+      type: ErrorTypes.MEDIA_ERROR,
+      details: ErrorDetails.BUFFER_APPENDING_ERROR,
+      sourceBufferName: type,
+      error,
+      fatal: false
+    });
+    // updateend is always fired after error, so we'll allow that to shift the current operation off of the queue
+    const operation = this.currentOp(type);
+    if (operation) {
+      operation.onError(error);
+    }
+  }
+  updateTimestampOffset(sb, timestampOffset, tolerance, type, sn, cc) {
+    const delta = timestampOffset - sb.timestampOffset;
+    if (Math.abs(delta) >= tolerance) {
+      this.log(`Updating ${type} SourceBuffer timestampOffset to ${timestampOffset} (sn: ${sn} cc: ${cc})`);
+      sb.timestampOffset = timestampOffset;
+    }
+  }
+
+  // This method must result in an updateend event; if remove is not called, onSBUpdateEnd must be called manually
+  removeExecutor(type, startOffset, endOffset) {
+    const {
+      media,
+      mediaSource
+    } = this;
+    const track = this.tracks[type];
+    const sb = track == null ? void 0 : track.buffer;
+    if (!media || !mediaSource || !sb) {
+      this.warn(`Attempting to remove from the ${type} SourceBuffer, but it does not exist`);
+      this.shiftAndExecuteNext(type);
+      return;
+    }
+    const mediaDuration = isFiniteNumber(media.duration) ? media.duration : Infinity;
+    const msDuration = isFiniteNumber(mediaSource.duration) ? mediaSource.duration : Infinity;
+    const removeStart = Math.max(0, startOffset);
+    const removeEnd = Math.min(endOffset, mediaDuration, msDuration);
+    if (removeEnd > removeStart && (!track.ending || track.ended)) {
+      track.ended = false;
+      this.log(`Removing [${removeStart},${removeEnd}] from the ${type} SourceBuffer`);
+      sb.remove(removeStart, removeEnd);
+    } else {
+      // Cycle the queue
+      this.shiftAndExecuteNext(type);
+    }
+  }
+
+  // This method must result in an updateend event; if append is not called, onSBUpdateEnd must be called manually
+  appendExecutor(data, type) {
+    const track = this.tracks[type];
+    const sb = track == null ? void 0 : track.buffer;
+    if (!sb) {
+      throw new HlsJsTrackRemovedError(`Attempting to append to the ${type} SourceBuffer, but it does not exist`);
+    }
+    track.ending = false;
+    track.ended = false;
+    sb.appendBuffer(data);
+  }
+  blockUntilOpen(callback) {
+    if (this.isUpdating() || this.isQueued()) {
+      this.blockBuffers(callback).catch(error => {
+        this.warn(`SourceBuffer blocked callback ${error}`);
+        this.stepOperationQueue(this.sourceBufferTypes);
+      });
+    } else {
+      try {
+        callback();
+      } catch (error) {
+        this.warn(`Callback run without blocking ${this.operationQueue} ${error}`);
+      }
+    }
+  }
+  isUpdating() {
+    return this.sourceBuffers.some(([type, sb]) => type && sb.updating);
+  }
+  isQueued() {
+    return this.sourceBuffers.some(([type]) => type && !!this.currentOp(type));
+  }
+  isPending(track) {
+    return !!track && !track.buffer;
+  }
+
+  // Enqueues an operation to each SourceBuffer queue which, upon execution, resolves a promise. When all promises
+  // resolve, the onUnblocked function is executed. Functions calling this method do not need to unblock the queue
+  // upon completion, since we already do it here
+  blockBuffers(onUnblocked, bufferNames = this.sourceBufferTypes) {
+    if (!bufferNames.length) {
+      this.log('Blocking operation requested, but no SourceBuffers exist');
+      return Promise.resolve().then(onUnblocked);
+    }
+    const {
+      operationQueue
+    } = this;
+
+    // logger.debug(`[buffer-controller]: Blocking ${buffers} SourceBuffer`);
+    const blockingOperations = bufferNames.map(type => this.appendBlocker(type));
+    const audioBlocked = bufferNames.length > 1 && !!this.blockedAudioAppend;
+    if (audioBlocked) {
+      this.unblockAudio();
+    }
+    return Promise.all(blockingOperations).then(result => {
+      if (operationQueue !== this.operationQueue) {
+        return;
+      }
+      // logger.debug(`[buffer-controller]: Blocking operation resolved; unblocking ${buffers} SourceBuffer`);
+      onUnblocked();
+      this.stepOperationQueue(this.sourceBufferTypes);
+    });
+  }
+  stepOperationQueue(bufferNames) {
+    bufferNames.forEach(type => {
+      var _this$tracks$type4;
+      const sb = (_this$tracks$type4 = this.tracks[type]) == null ? void 0 : _this$tracks$type4.buffer;
+      // Only cycle the queue if the SB is not updating. There's a bug in Chrome which sets the SB updating flag to
+      // true when changing the MediaSource duration (https://bugs.chromium.org/p/chromium/issues/detail?id=959359&can=2&q=mediasource%20duration)
+      // While this is a workaround, it's probably useful to have around
+      if (!sb || sb.updating) {
+        return;
+      }
+      this.shiftAndExecuteNext(type);
+    });
+  }
+  append(operation, type, pending) {
+    if (this.operationQueue) {
+      this.operationQueue.append(operation, type, pending);
+    }
+  }
+  appendBlocker(type) {
+    if (this.operationQueue) {
+      return this.operationQueue.appendBlocker(type);
+    }
+  }
+  currentOp(type) {
+    if (this.operationQueue) {
+      return this.operationQueue.current(type);
+    }
+    return null;
+  }
+  executeNext(type) {
+    if (type && this.operationQueue) {
+      this.operationQueue.executeNext(type);
+    }
+  }
+  shiftAndExecuteNext(type) {
+    if (this.operationQueue) {
+      this.operationQueue.shiftAndExecuteNext(type);
+    }
+  }
+  get pendingTrackCount() {
+    return Object.keys(this.tracks).reduce((acc, type) => acc + (this.isPending(this.tracks[type]) ? 1 : 0), 0);
+  }
+  get sourceBufferCount() {
+    return this.sourceBuffers.reduce((acc, [type]) => acc + (type ? 1 : 0), 0);
+  }
+  get sourceBufferTypes() {
+    return this.sourceBuffers.map(([type]) => type).filter(type => !!type);
+  }
+  addBufferListener(type, event, fn) {
+    const track = this.tracks[type];
+    if (!track) {
+      return;
+    }
+    const buffer = track.buffer;
+    if (!buffer) {
+      return;
+    }
+    const listener = fn.bind(this, type);
+    track.listeners.push({
+      event,
+      listener
+    });
+    buffer.addEventListener(event, listener);
+  }
+  removeBufferListeners(type) {
+    const track = this.tracks[type];
+    if (!track) {
+      return;
+    }
+    const buffer = track.buffer;
+    if (!buffer) {
+      return;
+    }
+    track.listeners.forEach(l => {
+      buffer.removeEventListener(l.event, l.listener);
+    });
+    track.listeners.length = 0;
+  }
+}
+function removeSourceChildren(node) {
+  const sourceChildren = node.querySelectorAll('source');
+  [].slice.call(sourceChildren).forEach(source => {
+    node.removeChild(source);
+  });
+}
+function addSource(media, url) {
+  const source = self.document.createElement('source');
+  source.type = 'video/mp4';
+  source.src = url;
+  media.appendChild(source);
+}
+function sourceBufferNameToIndex(type) {
+  return type === 'audio' ? 1 : 0;
+}
+
+class CapLevelController {
+  constructor(hls) {
+    this.hls = void 0;
+    this.autoLevelCapping = void 0;
+    this.firstLevel = void 0;
+    this.media = void 0;
+    this.restrictedLevels = void 0;
+    this.timer = void 0;
+    this.clientRect = void 0;
+    this.streamController = void 0;
+    this.hls = hls;
+    this.autoLevelCapping = Number.POSITIVE_INFINITY;
+    this.firstLevel = -1;
+    this.media = null;
+    this.restrictedLevels = [];
+    this.timer = undefined;
+    this.clientRect = null;
+    this.registerListeners();
+  }
+  setStreamController(streamController) {
+    this.streamController = streamController;
+  }
+  destroy() {
+    if (this.hls) {
+      this.unregisterListener();
+    }
+    if (this.timer) {
+      this.stopCapping();
+    }
+    this.media = null;
+    this.clientRect = null;
+    // @ts-ignore
+    this.hls = this.streamController = null;
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.FPS_DROP_LEVEL_CAPPING, this.onFpsDropLevelCapping, this);
+    hls.on(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    hls.on(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.on(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.on(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+    hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+  }
+  unregisterListener() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.FPS_DROP_LEVEL_CAPPING, this.onFpsDropLevelCapping, this);
+    hls.off(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    hls.off(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.off(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.off(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+    hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+  }
+  onFpsDropLevelCapping(event, data) {
+    // Don't add a restricted level more than once
+    const level = this.hls.levels[data.droppedLevel];
+    if (this.isLevelAllowed(level)) {
+      this.restrictedLevels.push({
+        bitrate: level.bitrate,
+        height: level.height,
+        width: level.width
+      });
+    }
+  }
+  onMediaAttaching(event, data) {
+    this.media = data.media instanceof HTMLVideoElement ? data.media : null;
+    this.clientRect = null;
+    if (this.timer && this.hls.levels.length) {
+      this.detectPlayerSize();
+    }
+  }
+  onManifestParsed(event, data) {
+    const hls = this.hls;
+    this.restrictedLevels = [];
+    this.firstLevel = data.firstLevel;
+    if (hls.config.capLevelToPlayerSize && data.video) {
+      // Start capping immediately if the manifest has signaled video codecs
+      this.startCapping();
+    }
+  }
+  onLevelsUpdated(event, data) {
+    if (this.timer && isFiniteNumber(this.autoLevelCapping)) {
+      this.detectPlayerSize();
+    }
+  }
+
+  // Only activate capping when playing a video stream; otherwise, multi-bitrate audio-only streams will be restricted
+  // to the first level
+  onBufferCodecs(event, data) {
+    const hls = this.hls;
+    if (hls.config.capLevelToPlayerSize && data.video) {
+      // If the manifest did not signal a video codec capping has been deferred until we're certain video is present
+      this.startCapping();
+    }
+  }
+  onMediaDetaching() {
+    this.stopCapping();
+    this.media = null;
+  }
+  detectPlayerSize() {
+    if (this.media) {
+      if (this.mediaHeight <= 0 || this.mediaWidth <= 0) {
+        this.clientRect = null;
+        return;
+      }
+      const levels = this.hls.levels;
+      if (levels.length) {
+        const hls = this.hls;
+        const maxLevel = this.getMaxLevel(levels.length - 1);
+        if (maxLevel !== this.autoLevelCapping) {
+          hls.logger.log(`Setting autoLevelCapping to ${maxLevel}: ${levels[maxLevel].height}p@${levels[maxLevel].bitrate} for media ${this.mediaWidth}x${this.mediaHeight}`);
+        }
+        hls.autoLevelCapping = maxLevel;
+        if (hls.autoLevelEnabled && hls.autoLevelCapping > this.autoLevelCapping && this.streamController) {
+          // if auto level capping has a higher value for the previous one, flush the buffer using nextLevelSwitch
+          // usually happen when the user go to the fullscreen mode.
+          this.streamController.nextLevelSwitch();
+        }
+        this.autoLevelCapping = hls.autoLevelCapping;
+      }
+    }
+  }
+
+  /*
+   * returns level should be the one with the dimensions equal or greater than the media (player) dimensions (so the video will be downscaled)
+   */
+  getMaxLevel(capLevelIndex) {
+    const levels = this.hls.levels;
+    if (!levels.length) {
+      return -1;
+    }
+    const validLevels = levels.filter((level, index) => this.isLevelAllowed(level) && index <= capLevelIndex);
+    this.clientRect = null;
+    return CapLevelController.getMaxLevelByMediaSize(validLevels, this.mediaWidth, this.mediaHeight);
+  }
+  startCapping() {
+    if (this.timer) {
+      // Don't reset capping if started twice; this can happen if the manifest signals a video codec
+      return;
+    }
+    this.autoLevelCapping = Number.POSITIVE_INFINITY;
+    self.clearInterval(this.timer);
+    this.timer = self.setInterval(this.detectPlayerSize.bind(this), 1000);
+    this.detectPlayerSize();
+  }
+  stopCapping() {
+    this.restrictedLevels = [];
+    this.firstLevel = -1;
+    this.autoLevelCapping = Number.POSITIVE_INFINITY;
+    if (this.timer) {
+      self.clearInterval(this.timer);
+      this.timer = undefined;
+    }
+  }
+  getDimensions() {
+    if (this.clientRect) {
+      return this.clientRect;
+    }
+    const media = this.media;
+    const boundsRect = {
+      width: 0,
+      height: 0
+    };
+    if (media) {
+      const clientRect = media.getBoundingClientRect();
+      boundsRect.width = clientRect.width;
+      boundsRect.height = clientRect.height;
+      if (!boundsRect.width && !boundsRect.height) {
+        // When the media element has no width or height (equivalent to not being in the DOM),
+        // then use its width and height attributes (media.width, media.height)
+        boundsRect.width = clientRect.right - clientRect.left || media.width || 0;
+        boundsRect.height = clientRect.bottom - clientRect.top || media.height || 0;
+      }
+    }
+    this.clientRect = boundsRect;
+    return boundsRect;
+  }
+  get mediaWidth() {
+    return this.getDimensions().width * this.contentScaleFactor;
+  }
+  get mediaHeight() {
+    return this.getDimensions().height * this.contentScaleFactor;
+  }
+  get contentScaleFactor() {
+    let pixelRatio = 1;
+    if (!this.hls.config.ignoreDevicePixelRatio) {
+      try {
+        pixelRatio = self.devicePixelRatio;
+      } catch (e) {
+        /* no-op */
+      }
+    }
+    return Math.min(pixelRatio, this.hls.config.maxDevicePixelRatio);
+  }
+  isLevelAllowed(level) {
+    const restrictedLevels = this.restrictedLevels;
+    return !restrictedLevels.some(restrictedLevel => {
+      return level.bitrate === restrictedLevel.bitrate && level.width === restrictedLevel.width && level.height === restrictedLevel.height;
+    });
+  }
+  static getMaxLevelByMediaSize(levels, width, height) {
+    if (!(levels != null && levels.length)) {
+      return -1;
+    }
+
+    // Levels can have the same dimensions but differing bandwidths - since levels are ordered, we can look to the next
+    // to determine whether we've chosen the greatest bandwidth for the media's dimensions
+    const atGreatestBandwidth = (curLevel, nextLevel) => {
+      if (!nextLevel) {
+        return true;
+      }
+      return curLevel.width !== nextLevel.width || curLevel.height !== nextLevel.height;
+    };
+
+    // If we run through the loop without breaking, the media's dimensions are greater than every level, so default to
+    // the max level
+    let maxLevelIndex = levels.length - 1;
+    // Prevent changes in aspect-ratio from causing capping to toggle back and forth
+    const squareSize = Math.max(width, height);
+    for (let i = 0; i < levels.length; i += 1) {
+      const level = levels[i];
+      if ((level.width >= squareSize || level.height >= squareSize) && atGreatestBandwidth(level, levels[i + 1])) {
+        maxLevelIndex = i;
+        break;
+      }
+    }
+    return maxLevelIndex;
+  }
+}
+
+/**
+ * Common Media Object Type
+ *
+ * @internal
+ */
+const CmObjectType = {
+  /**
+   * text file, such as a manifest or playlist
+   */
+  MANIFEST: 'm',
+  /**
+   * audio only
+   */
+  AUDIO: 'a',
+  /**
+   * video only
+   */
+  VIDEO: 'v',
+  /**
+   * muxed audio and video
+   */
+  MUXED: 'av',
+  /**
+   * init segment
+   */
+  INIT: 'i',
+  /**
+   * caption or subtitle
+   */
+  CAPTION: 'c',
+  /**
+   * ISOBMFF timed text track
+   */
+  TIMED_TEXT: 'tt',
+  /**
+   * cryptographic key, license or certificate.
+   */
+  KEY: 'k',
+  /**
+   * other
+   */
+  OTHER: 'o'
+};
+
+/**
+ * Common Media Client Data Object Type
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @enum
+ */
+const CmcdObjectType = CmObjectType;
+
+/**
+ * Common Media Streaming Format
+ *
+ * @internal
+ */
+const CmStreamingFormat = {
+  /**
+   * HTTP Live Streaming (HLS)
+   */
+  HLS: 'h'};
+
+/**
+ * Common Media Client Data Streaming Format
+ *
+ * @group CMCD
+ *
+ * @enum
+ *
+ * @beta
+ */
+const CmcdStreamingFormat = CmStreamingFormat;
+
+/**
+ * Structured Field Item
+ *
+ * @group Structured Field
+ *
+ * @beta
+ */
+class SfItem {
+  constructor(value, params) {
+    if (Array.isArray(value)) {
+      value = value.map(v => v instanceof SfItem ? v : new SfItem(v));
+    }
+    this.value = value;
+    this.params = params;
+  }
+}
+
+const DICT = 'Dict';
+
+function format(value) {
+  if (Array.isArray(value)) {
+    return JSON.stringify(value);
+  }
+  if (value instanceof Map) {
+    return 'Map{}';
+  }
+  if (value instanceof Set) {
+    return 'Set{}';
+  }
+  if (typeof value === 'object') {
+    return JSON.stringify(value);
+  }
+  return String(value);
+}
+function throwError(action, src, type, cause) {
+  return new Error(`failed to ${action} "${format(src)}" as ${type}`, {
+    cause
+  });
+}
+
+function serializeError(src, type, cause) {
+  return throwError('serialize', src, type, cause);
+}
+
+/**
+ * A class to represent structured field tokens when `Symbol` is not available.
+ *
+ * @group Structured Field
+ *
+ * @beta
+ */
+class SfToken {
+  constructor(description) {
+    this.description = description;
+  }
+}
+
+const BARE_ITEM = 'Bare Item';
+
+const BOOLEAN = 'Boolean';
+
+// 4.1.9.  Serializing a Boolean
+//
+// Given a Boolean as input_boolean, return an ASCII string suitable for
+// use in a HTTP field value.
+//
+// 1.  If input_boolean is not a boolean, fail serialization.
+//
+// 2.  Let output be an empty string.
+//
+// 3.  Append "?" to output.
+//
+// 4.  If input_boolean is true, append "1" to output.
+//
+// 5.  If input_boolean is false, append "0" to output.
+//
+// 6.  Return output.
+function serializeBoolean(value) {
+  if (typeof value !== 'boolean') {
+    throw serializeError(value, BOOLEAN);
+  }
+  return value ? '?1' : '?0';
+}
+
+/**
+ * Encodes binary data to base64
+ *
+ * @param binary - The binary data to encode
+ * @returns The base64 encoded string
+ *
+ * @group Utils
+ *
+ * @beta
+ */
+function encodeBase64(binary) {
+  return btoa(String.fromCharCode(...binary));
+}
+
+const BYTES = 'Byte Sequence';
+
+// 4.1.8.  Serializing a Byte Sequence
+//
+// Given a Byte Sequence as input_bytes, return an ASCII string suitable
+// for use in a HTTP field value.
+//
+// 1.  If input_bytes is not a sequence of bytes, fail serialization.
+//
+// 2.  Let output be an empty string.
+//
+// 3.  Append ":" to output.
+//
+// 4.  Append the result of base64-encoding input_bytes as per
+//     [RFC4648], Section 4, taking account of the requirements below.
+//
+// 5.  Append ":" to output.
+//
+// 6.  Return output.
+//
+// The encoded data is required to be padded with "=", as per [RFC4648],
+// Section 3.2.
+//
+// Likewise, encoded data SHOULD have pad bits set to zero, as per
+// [RFC4648], Section 3.5, unless it is not possible to do so due to
+// implementation constraints.
+function serializeByteSequence(value) {
+  if (ArrayBuffer.isView(value) === false) {
+    throw serializeError(value, BYTES);
+  }
+  return `:${encodeBase64(value)}:`;
+}
+
+const INTEGER = 'Integer';
+
+function isInvalidInt(value) {
+  return value < -999999999999999 || 999999999999999 < value;
+}
+
+// 4.1.4.  Serializing an Integer
+//
+// Given an Integer as input_integer, return an ASCII string suitable
+// for use in a HTTP field value.
+//
+// 1.  If input_integer is not an integer in the range of
+//     -999,999,999,999,999 to 999,999,999,999,999 inclusive, fail
+//     serialization.
+//
+// 2.  Let output be an empty string.
+//
+// 3.  If input_integer is less than (but not equal to) 0, append "-" to
+//     output.
+//
+// 4.  Append input_integer's numeric value represented in base 10 using
+//     only decimal digits to output.
+//
+// 5.  Return output.
+function serializeInteger(value) {
+  if (isInvalidInt(value)) {
+    throw serializeError(value, INTEGER);
+  }
+  return value.toString();
+}
+
+// 4.1.10.  Serializing a Date
+//
+// Given a Date as input_integer, return an ASCII string suitable for
+// use in an HTTP field value.
+// 1.  Let output be "@".
+// 2.  Append to output the result of running Serializing an Integer
+//     with input_date (Section 4.1.4).
+// 3.  Return output.
+function serializeDate(value) {
+  return `@${serializeInteger(value.getTime() / 1000)}`;
+}
+
+/**
+ * This implements the rounding procedure described in step 2 of the "Serializing a Decimal" specification.
+ * This rounding style is known as "even rounding", "banker's rounding", or "commercial rounding".
+ *
+ * @param value - The value to round
+ * @param precision - The number of decimal places to round to
+ * @returns The rounded value
+ *
+ * @group Utils
+ *
+ * @beta
+ */
+function roundToEven(value, precision) {
+  if (value < 0) {
+    return -roundToEven(-value, precision);
+  }
+  const decimalShift = Math.pow(10, precision);
+  const isEquidistant = Math.abs(value * decimalShift % 1 - 0.5) < Number.EPSILON;
+  if (isEquidistant) {
+    // If the tail of the decimal place is 'equidistant' we round to the nearest even value
+    const flooredValue = Math.floor(value * decimalShift);
+    return (flooredValue % 2 === 0 ? flooredValue : flooredValue + 1) / decimalShift;
+  } else {
+    // Otherwise, proceed as normal
+    return Math.round(value * decimalShift) / decimalShift;
+  }
+}
+
+const DECIMAL = 'Decimal';
+
+// 4.1.5.  Serializing a Decimal
+//
+// Given a decimal number as input_decimal, return an ASCII string
+// suitable for use in a HTTP field value.
+//
+// 1.   If input_decimal is not a decimal number, fail serialization.
+//
+// 2.   If input_decimal has more than three significant digits to the
+//      right of the decimal point, round it to three decimal places,
+//      rounding the final digit to the nearest value, or to the even
+//      value if it is equidistant.
+//
+// 3.   If input_decimal has more than 12 significant digits to the left
+//      of the decimal point after rounding, fail serialization.
+//
+// 4.   Let output be an empty string.
+//
+// 5.   If input_decimal is less than (but not equal to) 0, append "-"
+//      to output.
+//
+// 6.   Append input_decimal's integer component represented in base 10
+//      (using only decimal digits) to output; if it is zero, append
+//      "0".
+//
+// 7.   Append "." to output.
+//
+// 8.   If input_decimal's fractional component is zero, append "0" to
+//      output.
+//
+// 9.   Otherwise, append the significant digits of input_decimal's
+//      fractional component represented in base 10 (using only decimal
+//      digits) to output.
+//
+// 10.  Return output.
+function serializeDecimal(value) {
+  const roundedValue = roundToEven(value, 3); // round to 3 decimal places
+  if (Math.floor(Math.abs(roundedValue)).toString().length > 12) {
+    throw serializeError(value, DECIMAL);
+  }
+  const stringValue = roundedValue.toString();
+  return stringValue.includes('.') ? stringValue : `${stringValue}.0`;
+}
+
+const STRING = 'String';
+
+const STRING_REGEX = /[\x00-\x1f\x7f]+/;
+
+// 4.1.6.  Serializing a String
+//
+// Given a String as input_string, return an ASCII string suitable for
+// use in a HTTP field value.
+//
+// 1.  Convert input_string into a sequence of ASCII characters; if
+//     conversion fails, fail serialization.
+//
+// 2.  If input_string contains characters in the range %x00-1f or %x7f
+//     (i.e., not in VCHAR or SP), fail serialization.
+//
+// 3.  Let output be the string DQUOTE.
+//
+// 4.  For each character char in input_string:
+//
+//     1.  If char is "\" or DQUOTE:
+//
+//         1.  Append "\" to output.
+//
+//     2.  Append char to output.
+//
+// 5.  Append DQUOTE to output.
+//
+// 6.  Return output.
+function serializeString(value) {
+  if (STRING_REGEX.test(value)) {
+    throw serializeError(value, STRING);
+  }
+  return `"${value.replace(/\\/g, `\\\\`).replace(/"/g, `\\"`)}"`;
+}
+
+/**
+ * Converts a symbol to a string.
+ *
+ * @param symbol - The symbol to convert.
+ *
+ * @returns The string representation of the symbol.
+ *
+ * @internal
+ */
+function symbolToStr(symbol) {
+  return symbol.description || symbol.toString().slice(7, -1);
+}
+
+const TOKEN = 'Token';
+
+function serializeToken(token) {
+  const value = symbolToStr(token);
+  if (/^([a-zA-Z*])([!#$%&'*+\-.^_`|~\w:/]*)$/.test(value) === false) {
+    throw serializeError(value, TOKEN);
+  }
+  return value;
+}
+
+// 4.1.3.1.  Serializing a Bare Item
+//
+// Given an Item as input_item, return an ASCII string suitable for use
+// in a HTTP field value.
+//
+// 1.  If input_item is an Integer, return the result of running
+//     Serializing an Integer (Section 4.1.4) with input_item.
+//
+// 2.  If input_item is a Decimal, return the result of running
+//     Serializing a Decimal (Section 4.1.5) with input_item.
+//
+// 3.  If input_item is a String, return the result of running
+//     Serializing a String (Section 4.1.6) with input_item.
+//
+// 4.  If input_item is a Token, return the result of running
+//     Serializing a Token (Section 4.1.7) with input_item.
+//
+// 5.  If input_item is a Boolean, return the result of running
+//     Serializing a Boolean (Section 4.1.9) with input_item.
+//
+// 6.  If input_item is a Byte Sequence, return the result of running
+//     Serializing a Byte Sequence (Section 4.1.8) with input_item.
+//
+// 7.  If input_item is a Date, return the result of running Serializing
+//     a Date (Section 4.1.10) with input_item.
+//
+// 8.  Otherwise, fail serialization.
+function serializeBareItem(value) {
+  switch (typeof value) {
+    case 'number':
+      if (!isFiniteNumber(value)) {
+        throw serializeError(value, BARE_ITEM);
+      }
+      if (Number.isInteger(value)) {
+        return serializeInteger(value);
+      }
+      return serializeDecimal(value);
+    case 'string':
+      return serializeString(value);
+    case 'symbol':
+      return serializeToken(value);
+    case 'boolean':
+      return serializeBoolean(value);
+    case 'object':
+      if (value instanceof Date) {
+        return serializeDate(value);
+      }
+      if (value instanceof Uint8Array) {
+        return serializeByteSequence(value);
+      }
+      if (value instanceof SfToken) {
+        return serializeToken(value);
+      }
+    default:
+      // fail
+      throw serializeError(value, BARE_ITEM);
+  }
+}
+
+const KEY = 'Key';
+
+// 4.1.1.3.  Serializing a Key
+//
+// Given a key as input_key, return an ASCII string suitable for use in
+// a HTTP field value.
+//
+// 1.  Convert input_key into a sequence of ASCII characters; if
+//     conversion fails, fail serialization.
+//
+// 2.  If input_key contains characters not in lcalpha, DIGIT, "_", "-",
+//     ".", or "*" fail serialization.
+//
+// 3.  If the first character of input_key is not lcalpha or "*", fail
+//     serialization.
+//
+// 4.  Let output be an empty string.
+//
+// 5.  Append input_key to output.
+//
+// 6.  Return output.
+function serializeKey(value) {
+  if (/^[a-z*][a-z0-9\-_.*]*$/.test(value) === false) {
+    throw serializeError(value, KEY);
+  }
+  return value;
+}
+
+// 4.1.1.2.  Serializing Parameters
+//
+// Given an ordered Dictionary as input_parameters (each member having a
+// param_name and a param_value), return an ASCII string suitable for
+// use in a HTTP field value.
+//
+// 1.  Let output be an empty string.
+//
+// 2.  For each param_name with a value of param_value in
+//     input_parameters:
+//
+//     1.  Append ";" to output.
+//
+//     2.  Append the result of running Serializing a Key
+//         (Section 4.1.1.3) with param_name to output.
+//
+//     3.  If param_value is not Boolean true:
+//
+//         1.  Append "=" to output.
+//
+//         2.  Append the result of running Serializing a bare Item
+//             (Section 4.1.3.1) with param_value to output.
+//
+// 3.  Return output.
+function serializeParams(params) {
+  if (params == null) {
+    return '';
+  }
+  return Object.entries(params).map(([key, value]) => {
+    if (value === true) {
+      return `;${serializeKey(key)}`; // omit true
+    }
+    return `;${serializeKey(key)}=${serializeBareItem(value)}`;
+  }).join('');
+}
+
+// 4.1.3.  Serializing an Item
+//
+// Given an Item as bare_item and Parameters as item_parameters, return
+// an ASCII string suitable for use in a HTTP field value.
+//
+// 1.  Let output be an empty string.
+//
+// 2.  Append the result of running Serializing a Bare Item
+//     Section 4.1.3.1 with bare_item to output.
+//
+// 3.  Append the result of running Serializing Parameters
+//     Section 4.1.1.2 with item_parameters to output.
+//
+// 4.  Return output.
+function serializeItem(value) {
+  if (value instanceof SfItem) {
+    return `${serializeBareItem(value.value)}${serializeParams(value.params)}`;
+  } else {
+    return serializeBareItem(value);
+  }
+}
+
+// 4.1.1.1.  Serializing an Inner List
+//
+// Given an array of (member_value, parameters) tuples as inner_list,
+// and parameters as list_parameters, return an ASCII string suitable
+// for use in a HTTP field value.
+//
+// 1.  Let output be the string "(".
+//
+// 2.  For each (member_value, parameters) of inner_list:
+//
+//     1.  Append the result of running Serializing an Item
+//         (Section 4.1.3) with (member_value, parameters) to output.
+//
+//     2.  If more values remain in inner_list, append a single SP to
+//         output.
+//
+// 3.  Append ")" to output.
+//
+// 4.  Append the result of running Serializing Parameters
+//     (Section 4.1.1.2) with list_parameters to output.
+//
+// 5.  Return output.
+function serializeInnerList(value) {
+  return `(${value.value.map(serializeItem).join(' ')})${serializeParams(value.params)}`;
+}
+
+// 4.1.2.  Serializing a Dictionary
+//
+// Given an ordered Dictionary as input_dictionary (each member having a
+// member_name and a tuple value of (member_value, parameters)), return
+// an ASCII string suitable for use in a HTTP field value.
+//
+// 1.  Let output be an empty string.
+//
+// 2.  For each member_name with a value of (member_value, parameters)
+//     in input_dictionary:
+//
+//     1.  Append the result of running Serializing a Key
+//         (Section 4.1.1.3) with member's member_name to output.
+//
+//     2.  If member_value is Boolean true:
+//
+//         1.  Append the result of running Serializing Parameters
+//             (Section 4.1.1.2) with parameters to output.
+//
+//     3.  Otherwise:
+//
+//         1.  Append "=" to output.
+//
+//         2.  If member_value is an array, append the result of running
+//             Serializing an Inner List (Section 4.1.1.1) with
+//             (member_value, parameters) to output.
+//
+//         3.  Otherwise, append the result of running Serializing an
+//             Item (Section 4.1.3) with (member_value, parameters) to
+//             output.
+//
+//     4.  If more members remain in input_dictionary:
+//
+//         1.  Append "," to output.
+//
+//         2.  Append a single SP to output.
+//
+// 3.  Return output.
+function serializeDict(dict, options = {
+  whitespace: true
+}) {
+  if (typeof dict !== 'object' || dict == null) {
+    throw serializeError(dict, DICT);
+  }
+  const entries = dict instanceof Map ? dict.entries() : Object.entries(dict);
+  const optionalWhiteSpace = (options === null || options === void 0 ? void 0 : options.whitespace) ? ' ' : '';
+  return Array.from(entries).map(([key, item]) => {
+    if (item instanceof SfItem === false) {
+      item = new SfItem(item);
+    }
+    let output = serializeKey(key);
+    if (item.value === true) {
+      output += serializeParams(item.params);
+    } else {
+      output += '=';
+      if (Array.isArray(item.value)) {
+        output += serializeInnerList(item);
+      } else {
+        output += serializeItem(item);
+      }
+    }
+    return output;
+  }).join(`,${optionalWhiteSpace}`);
+}
+
+/**
+ * Encode an object into a structured field dictionary
+ *
+ * @param value - The structured field dictionary to encode
+ * @param options - Encoding options
+ *
+ * @returns The structured field string
+ *
+ * @group Structured Field
+ *
+ * @beta
+ */
+function encodeSfDict(value, options) {
+  return serializeDict(value, options);
+}
+
+/**
+ * CMCD object header name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_OBJECT = 'CMCD-Object';
+
+/**
+ * CMCD request header name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_REQUEST = 'CMCD-Request';
+
+/**
+ * CMCD session header name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_SESSION = 'CMCD-Session';
+
+/**
+ * CMCD status header name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_STATUS = 'CMCD-Status';
+
+/**
+ * The map of CMCD keys to their appropriate header shard.
+ *
+ * @group CMCD
+ *
+ * @internal
+ */
+const CMCD_HEADER_MAP = {
+  // Object
+  br: CMCD_OBJECT,
+  ab: CMCD_OBJECT,
+  d: CMCD_OBJECT,
+  ot: CMCD_OBJECT,
+  tb: CMCD_OBJECT,
+  tpb: CMCD_OBJECT,
+  lb: CMCD_OBJECT,
+  tab: CMCD_OBJECT,
+  lab: CMCD_OBJECT,
+  url: CMCD_OBJECT,
+  // Request
+  pb: CMCD_REQUEST,
+  bl: CMCD_REQUEST,
+  tbl: CMCD_REQUEST,
+  dl: CMCD_REQUEST,
+  ltc: CMCD_REQUEST,
+  mtp: CMCD_REQUEST,
+  nor: CMCD_REQUEST,
+  nrr: CMCD_REQUEST,
+  rc: CMCD_REQUEST,
+  sn: CMCD_REQUEST,
+  sta: CMCD_REQUEST,
+  su: CMCD_REQUEST,
+  ttfb: CMCD_REQUEST,
+  ttfbb: CMCD_REQUEST,
+  ttlb: CMCD_REQUEST,
+  cmsdd: CMCD_REQUEST,
+  cmsds: CMCD_REQUEST,
+  smrt: CMCD_REQUEST,
+  df: CMCD_REQUEST,
+  cs: CMCD_REQUEST,
+  // TODO: Which header to put the `ts` field is not defined yet.
+  ts: CMCD_REQUEST,
+  // Session
+  cid: CMCD_SESSION,
+  pr: CMCD_SESSION,
+  sf: CMCD_SESSION,
+  sid: CMCD_SESSION,
+  st: CMCD_SESSION,
+  v: CMCD_SESSION,
+  msd: CMCD_SESSION,
+  // Status
+  bs: CMCD_STATUS,
+  bsd: CMCD_STATUS,
+  cdn: CMCD_STATUS,
+  rtp: CMCD_STATUS,
+  bg: CMCD_STATUS,
+  pt: CMCD_STATUS,
+  ec: CMCD_STATUS,
+  e: CMCD_STATUS
+};
+
+/**
+ * CMCD header fields.
+ *
+ * @group CMCD
+ *
+ * @enum
+ *
+ * @beta
+ */
+const CmcdHeaderField = {
+  /**
+   * keys whose values vary with each request.
+   */
+  REQUEST: CMCD_REQUEST};
+
+function createHeaderMap(headerMap) {
+  return Object.keys(headerMap).reduce((acc, field) => {
+    var _a;
+    (_a = headerMap[field]) === null || _a === void 0 ? void 0 : _a.forEach(key => acc[key] = field);
+    return acc;
+  }, {});
+}
+/**
+ * Group a CMCD data object into header shards
+ *
+ * @param cmcd - The CMCD data object to convert.
+ * @param customHeaderMap - A map of CMCD header fields to custom CMCD keys.
+ *
+ * @returns The CMCD header shards.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+function groupCmcdHeaders(cmcd, customHeaderMap) {
+  const result = {};
+  if (!cmcd) {
+    return result;
+  }
+  const keys = Object.keys(cmcd);
+  const custom = customHeaderMap ? createHeaderMap(customHeaderMap) : {};
+  return keys.reduce((acc, key) => {
+    var _a;
+    const field = CMCD_HEADER_MAP[key] || custom[key] || CmcdHeaderField.REQUEST;
+    const data = (_a = acc[field]) !== null && _a !== void 0 ? _a : acc[field] = {};
+    data[key] = cmcd[key];
+    return acc;
+  }, result);
+}
+
+/**
+ * Checks if the given key is a token field.
+ *
+ * @param key - The key to check.
+ *
+ * @returns `true` if the key is a token field.
+ *
+ * @internal
+ */
+function isTokenField(key) {
+  return ['ot', 'sf', 'st', 'e', 'sta'].includes(key);
+}
+
+/**
+ * Checks if the given value is valid
+ *
+ * @param value - The value to check.
+ *
+ * @returns `true` if the key is a value is valid.
+ *
+ * @internal
+ */
+function isValid(value) {
+  if (typeof value === 'number') {
+    return isFiniteNumber(value);
+  }
+  return value != null && value !== '' && value !== false;
+}
+
+/**
+ * CMCD event mode variable name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_EVENT_MODE = 'event';
+
+/**
+ * Constructs a relative path from a URL.
+ *
+ * @param url - The destination URL
+ * @param base - The base URL
+ * @returns The relative path
+ *
+ * @group Utils
+ *
+ * @beta
+ */
+function urlToRelativePath(url, base) {
+  const to = new URL(url);
+  const from = new URL(base);
+  if (to.origin !== from.origin) {
+    return url;
+  }
+  const toPath = to.pathname.split('/').slice(1);
+  const fromPath = from.pathname.split('/').slice(1, -1);
+  // remove common parents
+  while (toPath[0] === fromPath[0]) {
+    toPath.shift();
+    fromPath.shift();
+  }
+  // add back paths
+  while (fromPath.length) {
+    fromPath.shift();
+    toPath.unshift('..');
+  }
+  const relativePath = toPath.join('/');
+  // preserve query parameters and hash of the destination url
+  return relativePath + to.search + to.hash;
+}
+
+const toRounded = value => Math.round(value);
+const toUrlSafe = (value, options) => {
+  if (Array.isArray(value)) {
+    return value.map(item => toUrlSafe(item, options));
+  }
+  if (value instanceof SfItem && typeof value.value === 'string') {
+    return new SfItem(toUrlSafe(value.value, options), value.params);
+  } else {
+    if (options.baseUrl) {
+      value = urlToRelativePath(value, options.baseUrl);
+    }
+    return options.version === 1 ? encodeURIComponent(value) : value;
+  }
+};
+const toHundred = value => toRounded(value / 100) * 100;
+const nor = (value, options) => {
+  let norValue = value;
+  if (options.version >= 2) {
+    if (value instanceof SfItem && typeof value.value === 'string') {
+      norValue = new SfItem([value]);
+    } else if (typeof value === 'string') {
+      norValue = [value];
+    }
+  }
+  return toUrlSafe(norValue, options);
+};
+/**
+ * The default formatters for CMCD values.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_FORMATTER_MAP = {
+  /**
+   * Bitrate (kbps) rounded integer
+   */
+  br: toRounded,
+  /**
+   * Duration (milliseconds) rounded integer
+   */
+  d: toRounded,
+  /**
+   * Buffer Length (milliseconds) rounded nearest 100ms
+   */
+  bl: toHundred,
+  /**
+   * Deadline (milliseconds) rounded nearest 100ms
+   */
+  dl: toHundred,
+  /**
+   * Measured Throughput (kbps) rounded nearest 100kbps
+   */
+  mtp: toHundred,
+  /**
+   * Next Object Request URL encoded
+   */
+  nor,
+  /**
+   * Requested maximum throughput (kbps) rounded nearest 100kbps
+   */
+  rtp: toHundred,
+  /**
+   * Top Bitrate (kbps) rounded integer
+   */
+  tb: toRounded
+};
+
+/**
+ * CMCD request mode variable name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_REQUEST_MODE = 'request';
+
+/**
+ * CMCD response mode variable name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_RESPONSE_MODE = 'response';
+
+/**
+ * Defines the common keys for CMCD (Common Media Client Data) version 2.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_COMMON_KEYS = ['ab', 'bg', 'bl', 'br', 'bs', 'bsd', 'cdn', 'cid', 'cs', 'df', 'ec', 'lab', 'lb', 'ltc', 'msd', 'mtp', 'pb', 'pr', 'pt', 'sf', 'sid', 'sn', 'st', 'sta', 'tab', 'tb', 'tbl', 'tpb', 'ts', 'v'];
+
+/**
+ * Defines the event-specific keys for CMCD (Common Media Client Data) version 2.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_EVENT_KEYS = ['e'];
+
+const CUSTOM_KEY_REGEX = /^[a-zA-Z0-9-.]+-[a-zA-Z0-9-.]+$/;
+/**
+ * Check if a key is a custom key.
+ *
+ * @param key - The key to check.
+ *
+ * @returns `true` if the key is a custom key, `false` otherwise.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+function isCmcdCustomKey(key) {
+  return CUSTOM_KEY_REGEX.test(key);
+}
+
+/**
+ * Check if a key is a valid CMCD event key.
+ *
+ * @param key - The key to check.
+ *
+ * @returns `true` if the key is a valid CMCD event key, `false` otherwise.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/isCmcdEventKey.test.ts#example}
+ */
+function isCmcdEventKey(key) {
+  return CMCD_COMMON_KEYS.includes(key) || CMCD_EVENT_KEYS.includes(key) || isCmcdCustomKey(key);
+}
+
+/**
+ * Defines the request-specific keys for CMCD (Common Media Client Data) version 2.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_REQUEST_KEYS = ['d', 'dl', 'nor', 'ot', 'rtp', 'su'];
+
+/**
+ * Check if a key is a valid CMCD request key.
+ *
+ * @param key - The key to check.
+ *
+ * @returns `true` if the key is a valid CMCD request key, `false` otherwise.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/isCmcdRequestKey.test.ts#example}
+ */
+function isCmcdRequestKey(key) {
+  return CMCD_COMMON_KEYS.includes(key) || CMCD_REQUEST_KEYS.includes(key) || isCmcdCustomKey(key);
+}
+
+/**
+ * CMCD v2 - Response-only and timing keys.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_RESPONSE_KEYS = ['cmsdd', 'cmsds', 'rc', 'smrt', 'ttfb', 'ttfbb', 'ttlb', 'url'];
+
+/**
+ * Check if a key is a valid CMCD response key.
+ *
+ * @param key - The key to check.
+ *
+ * @returns `true` if the key is a valid CMCD request key, `false` otherwise.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/isCmcdResponseKey.test.ts#example}
+ */
+function isCmcdResponseKey(key) {
+  return CMCD_COMMON_KEYS.includes(key) || CMCD_REQUEST_KEYS.includes(key) || CMCD_RESPONSE_KEYS.includes(key) || isCmcdCustomKey(key);
+}
+
+/**
+ * Defines the keys for CMCD (Common Media Client Data) version 1.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_V1_KEYS = ['bl', 'br', 'bs', 'cid', 'd', 'dl', 'mtp', 'nor', 'nrr', 'ot', 'pr', 'rtp', 'sf', 'sid', 'st', 'su', 'tb', 'v'];
+
+/**
+ * Filter function for CMCD v1 keys.
+ *
+ * @param key - The CMCD key to filter.
+ *
+ * @returns `true` if the key should be included, `false` otherwise.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/isCmcdV1Key.test.ts#example}
+ */
+function isCmcdV1Key(key) {
+  return CMCD_V1_KEYS.includes(key) || isCmcdCustomKey(key);
+}
+
+const filterMap = {
+  [CMCD_RESPONSE_MODE]: isCmcdResponseKey,
+  [CMCD_EVENT_MODE]: isCmcdEventKey,
+  [CMCD_REQUEST_MODE]: isCmcdRequestKey
+};
+/**
+ * Convert a generic object to CMCD data.
+ *
+ * @param obj - The CMCD object to process.
+ * @param options - Options for encoding.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+function prepareCmcdData(obj, options = {}) {
+  const results = {};
+  if (obj == null || typeof obj !== 'object') {
+    return results;
+  }
+  const version = options.version || obj['v'] || 1;
+  const reportingMode = options.reportingMode || CMCD_REQUEST_MODE;
+  const keyFilter = version === 1 ? isCmcdV1Key : filterMap[reportingMode];
+  // Filter keys based on the version, reporting mode and options
+  let keys = Object.keys(obj).filter(keyFilter);
+  const filter = options.filter;
+  if (typeof filter === 'function') {
+    keys = keys.filter(filter);
+  }
+  // Ensure all required keys are present before sorting
+  const needsTimestamp = reportingMode === CMCD_RESPONSE_MODE || reportingMode === CMCD_EVENT_MODE;
+  if (needsTimestamp && !keys.includes('ts')) {
+    keys.push('ts');
+  }
+  if (version > 1 && !keys.includes('v')) {
+    keys.push('v');
+  }
+  const formatters = _extends({}, CMCD_FORMATTER_MAP, options.formatters);
+  const formatterOptions = {
+    version,
+    reportingMode,
+    baseUrl: options.baseUrl
+  };
+  keys.sort().forEach(key => {
+    let value = obj[key];
+    const formatter = formatters[key];
+    if (typeof formatter === 'function') {
+      value = formatter(value, formatterOptions);
+    }
+    // Version should only be reported if not equal to 1.
+    if (key === 'v') {
+      if (version === 1) {
+        return;
+      } else {
+        value = version;
+      }
+    }
+    // Playback rate should only be sent if not equal to 1.
+    if (key == 'pr' && value === 1) {
+      return;
+    }
+    // Ensure a timestamp is set for response and event modes
+    if (needsTimestamp && key === 'ts' && !isFiniteNumber(value)) {
+      value = Date.now();
+    }
+    // ignore invalid values
+    if (!isValid(value)) {
+      return;
+    }
+    if (isTokenField(key) && typeof value === 'string') {
+      value = new SfToken(value);
+    }
+    results[key] = value;
+  });
+  return results;
+}
+
+/**
+ * Convert a CMCD data object to request headers
+ *
+ * @param cmcd - The CMCD data object to convert.
+ * @param options - Options for encoding the CMCD object.
+ *
+ * @returns The CMCD header shards.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/toCmcdHeaders.test.ts#example}
+ */
+function toCmcdHeaders(cmcd, options = {}) {
+  const result = {};
+  if (!cmcd) {
+    return result;
+  }
+  const data = prepareCmcdData(cmcd, options);
+  const shards = groupCmcdHeaders(data, options === null || options === void 0 ? void 0 : options.customHeaderMap);
+  return Object.entries(shards).reduce((acc, [field, value]) => {
+    const shard = encodeSfDict(value, {
+      whitespace: false
+    });
+    if (shard) {
+      acc[field] = shard;
+    }
+    return acc;
+  }, result);
+}
+
+/**
+ * Append CMCD query args to a header object.
+ *
+ * @param headers - The headers to append to.
+ * @param cmcd - The CMCD object to append.
+ * @param options - Encode options.
+ *
+ * @returns The headers with the CMCD header shards appended.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/appendCmcdHeaders.test.ts#example}
+ */
+function appendCmcdHeaders(headers, cmcd, options) {
+  return _extends(headers, toCmcdHeaders(cmcd, options));
+}
+
+/**
+ * CMCD parameter name.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+const CMCD_PARAM = 'CMCD';
+
+/**
+ * Encode a CMCD object to a string.
+ *
+ * @param cmcd - The CMCD object to encode.
+ * @param options - Options for encoding.
+ *
+ * @returns The encoded CMCD string.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/encodeCmcd.test.ts#example}
+ */
+function encodeCmcd(cmcd, options = {}) {
+  if (!cmcd) {
+    return '';
+  }
+  return encodeSfDict(prepareCmcdData(cmcd, options), {
+    whitespace: false
+  });
+}
+
+/**
+ * Convert a CMCD data object to a URL encoded string.
+ *
+ * @param cmcd - The CMCD object to convert.
+ * @param options - Options for encoding the CMCD object.
+ *
+ * @returns The URL encoded CMCD data.
+ *
+ * @group CMCD
+ *
+ * @beta
+ */
+function toCmcdUrl(cmcd, options = {}) {
+  if (!cmcd) {
+    return '';
+  }
+  const params = encodeCmcd(cmcd, options);
+  return encodeURIComponent(params);
+}
+
+/**
+ * Convert a CMCD data object to a query arg.
+ *
+ * @param cmcd - The CMCD object to convert.
+ * @param options - Options for encoding the CMCD object.
+ *
+ * @returns The CMCD query arg.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/toCmcdQuery.test.ts#example}
+ */
+function toCmcdQuery(cmcd, options = {}) {
+  if (!cmcd) {
+    return '';
+  }
+  const value = toCmcdUrl(cmcd, options);
+  return `${CMCD_PARAM}=${value}`;
+}
+
+const REGEX = /CMCD=[^&#]+/;
+/**
+ * Append CMCD query args to a URL.
+ *
+ * @param url - The URL to append to.
+ * @param cmcd - The CMCD object to append.
+ * @param options - Options for encoding the CMCD object.
+ *
+ * @returns The URL with the CMCD query args appended.
+ *
+ * @group CMCD
+ *
+ * @beta
+ *
+ * @example
+ * {@includeCode ../../test/cmcd/appendCmcdQuery.test.ts#example}
+ */
+function appendCmcdQuery(url, cmcd, options) {
+  // TODO: Replace with URLSearchParams once we drop Safari < 10.1 & Chrome < 49 support.
+  // https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams
+  const query = toCmcdQuery(cmcd, options);
+  if (!query) {
+    return url;
+  }
+  if (REGEX.test(url)) {
+    return url.replace(REGEX, query);
+  }
+  const separator = url.includes('?') ? '&' : '?';
+  return `${url}${separator}${query}`;
+}
+
+/**
+ * Controller to deal with Common Media Client Data (CMCD)
+ * @see https://cdn.cta.tech/cta/media/media/resources/standards/pdfs/cta-5004-final.pdf
+ */
+class CMCDController {
+  constructor(hls) {
+    this.hls = void 0;
+    this.config = void 0;
+    this.media = void 0;
+    this.sid = void 0;
+    this.cid = void 0;
+    this.useHeaders = false;
+    this.includeKeys = void 0;
+    this.initialized = false;
+    this.starved = false;
+    this.buffering = true;
+    this.audioBuffer = void 0;
+    this.videoBuffer = void 0;
+    this.onWaiting = () => {
+      if (this.initialized) {
+        this.starved = true;
+      }
+      this.buffering = true;
+    };
+    this.onPlaying = () => {
+      if (!this.initialized) {
+        this.initialized = true;
+      }
+      this.buffering = false;
+    };
+    /**
+     * Apply CMCD data to a manifest request.
+     */
+    this.applyPlaylistData = context => {
+      try {
+        this.apply(context, {
+          ot: CmcdObjectType.MANIFEST,
+          su: !this.initialized
+        });
+      } catch (error) {
+        this.hls.logger.warn('Could not generate manifest CMCD data.', error);
+      }
+    };
+    /**
+     * Apply CMCD data to a segment request
+     */
+    this.applyFragmentData = context => {
+      try {
+        const {
+          frag,
+          part
+        } = context;
+        const level = this.hls.levels[frag.level];
+        const ot = this.getObjectType(frag);
+        const data = {
+          d: (part || frag).duration * 1000,
+          ot
+        };
+        if (ot === CmcdObjectType.VIDEO || ot === CmcdObjectType.AUDIO || ot == CmcdObjectType.MUXED) {
+          data.br = level.bitrate / 1000;
+          data.tb = this.getTopBandwidth(ot) / 1000;
+          data.bl = this.getBufferLength(ot);
+        }
+        const next = part ? this.getNextPart(part) : this.getNextFrag(frag);
+        if (next != null && next.url && next.url !== frag.url) {
+          data.nor = next.url;
+        }
+        this.apply(context, data);
+      } catch (error) {
+        this.hls.logger.warn('Could not generate segment CMCD data.', error);
+      }
+    };
+    this.hls = hls;
+    const config = this.config = hls.config;
+    const {
+      cmcd
+    } = config;
+    if (cmcd != null) {
+      config.pLoader = this.createPlaylistLoader();
+      config.fLoader = this.createFragmentLoader();
+      this.sid = cmcd.sessionId || hls.sessionId;
+      this.cid = cmcd.contentId;
+      this.useHeaders = cmcd.useHeaders === true;
+      this.includeKeys = cmcd.includeKeys;
+      this.registerListeners();
+    }
+  }
+  registerListeners() {
+    const hls = this.hls;
+    hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.on(Events.MEDIA_DETACHED, this.onMediaDetached, this);
+    hls.on(Events.BUFFER_CREATED, this.onBufferCreated, this);
+  }
+  unregisterListeners() {
+    const hls = this.hls;
+    hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.off(Events.MEDIA_DETACHED, this.onMediaDetached, this);
+    hls.off(Events.BUFFER_CREATED, this.onBufferCreated, this);
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.onMediaDetached();
+
+    // @ts-ignore
+    this.hls = this.config = this.audioBuffer = this.videoBuffer = null;
+    // @ts-ignore
+    this.onWaiting = this.onPlaying = this.media = null;
+  }
+  onMediaAttached(event, data) {
+    this.media = data.media;
+    this.media.addEventListener('waiting', this.onWaiting);
+    this.media.addEventListener('playing', this.onPlaying);
+  }
+  onMediaDetached() {
+    if (!this.media) {
+      return;
+    }
+    this.media.removeEventListener('waiting', this.onWaiting);
+    this.media.removeEventListener('playing', this.onPlaying);
+
+    // @ts-ignore
+    this.media = null;
+  }
+  onBufferCreated(event, data) {
+    var _data$tracks$audio, _data$tracks$video;
+    this.audioBuffer = (_data$tracks$audio = data.tracks.audio) == null ? void 0 : _data$tracks$audio.buffer;
+    this.videoBuffer = (_data$tracks$video = data.tracks.video) == null ? void 0 : _data$tracks$video.buffer;
+  }
+  /**
+   * Create baseline CMCD data
+   */
+  createData() {
+    var _this$media;
+    return {
+      v: 1,
+      sf: CmcdStreamingFormat.HLS,
+      sid: this.sid,
+      cid: this.cid,
+      pr: (_this$media = this.media) == null ? void 0 : _this$media.playbackRate,
+      mtp: this.hls.bandwidthEstimate / 1000
+    };
+  }
+
+  /**
+   * Apply CMCD data to a request.
+   */
+  apply(context, data = {}) {
+    // apply baseline data
+    _extends(data, this.createData());
+    const isVideo = data.ot === CmcdObjectType.INIT || data.ot === CmcdObjectType.VIDEO || data.ot === CmcdObjectType.MUXED;
+    if (this.starved && isVideo) {
+      data.bs = true;
+      data.su = true;
+      this.starved = false;
+    }
+    if (data.su == null) {
+      data.su = this.buffering;
+    }
+
+    // TODO: Implement rtp, nrr, dl
+
+    const {
+      includeKeys
+    } = this;
+    if (includeKeys) {
+      data = Object.keys(data).reduce((acc, key) => {
+        includeKeys.includes(key) && (acc[key] = data[key]);
+        return acc;
+      }, {});
+    }
+    const options = {
+      baseUrl: context.url
+    };
+    if (this.useHeaders) {
+      if (!context.headers) {
+        context.headers = {};
+      }
+      appendCmcdHeaders(context.headers, data, options);
+    } else {
+      context.url = appendCmcdQuery(context.url, data, options);
+    }
+  }
+  getNextFrag(fragment) {
+    var _this$hls$levels$frag;
+    const levelDetails = (_this$hls$levels$frag = this.hls.levels[fragment.level]) == null ? void 0 : _this$hls$levels$frag.details;
+    if (levelDetails) {
+      const index = fragment.sn - levelDetails.startSN;
+      return levelDetails.fragments[index + 1];
+    }
+    return undefined;
+  }
+  getNextPart(part) {
+    var _this$hls$levels$frag2;
+    const {
+      index,
+      fragment
+    } = part;
+    const partList = (_this$hls$levels$frag2 = this.hls.levels[fragment.level]) == null || (_this$hls$levels$frag2 = _this$hls$levels$frag2.details) == null ? void 0 : _this$hls$levels$frag2.partList;
+    if (partList) {
+      const {
+        sn
+      } = fragment;
+      for (let i = partList.length - 1; i >= 0; i--) {
+        const p = partList[i];
+        if (p.index === index && p.fragment.sn === sn) {
+          return partList[i + 1];
+        }
+      }
+    }
+    return undefined;
+  }
+
+  /**
+   * The CMCD object type.
+   */
+  getObjectType(fragment) {
+    const {
+      type
+    } = fragment;
+    if (type === 'subtitle') {
+      return CmcdObjectType.TIMED_TEXT;
+    }
+    if (fragment.sn === 'initSegment') {
+      return CmcdObjectType.INIT;
+    }
+    if (type === 'audio') {
+      return CmcdObjectType.AUDIO;
+    }
+    if (type === 'main') {
+      if (!this.hls.audioTracks.length) {
+        return CmcdObjectType.MUXED;
+      }
+      return CmcdObjectType.VIDEO;
+    }
+    return undefined;
+  }
+
+  /**
+   * Get the highest bitrate.
+   */
+  getTopBandwidth(type) {
+    let bitrate = 0;
+    let levels;
+    const hls = this.hls;
+    if (type === CmcdObjectType.AUDIO) {
+      levels = hls.audioTracks;
+    } else {
+      const max = hls.maxAutoLevel;
+      const len = max > -1 ? max + 1 : hls.levels.length;
+      levels = hls.levels.slice(0, len);
+    }
+    levels.forEach(level => {
+      if (level.bitrate > bitrate) {
+        bitrate = level.bitrate;
+      }
+    });
+    return bitrate > 0 ? bitrate : NaN;
+  }
+
+  /**
+   * Get the buffer length for a media type in milliseconds
+   */
+  getBufferLength(type) {
+    const media = this.media;
+    const buffer = type === CmcdObjectType.AUDIO ? this.audioBuffer : this.videoBuffer;
+    if (!buffer || !media) {
+      return NaN;
+    }
+    const info = BufferHelper.bufferInfo(buffer, media.currentTime, this.config.maxBufferHole);
+    return info.len * 1000;
+  }
+
+  /**
+   * Create a playlist loader
+   */
+  createPlaylistLoader() {
+    const {
+      pLoader
+    } = this.config;
+    const apply = this.applyPlaylistData;
+    const Ctor = pLoader || this.config.loader;
+    return class CmcdPlaylistLoader {
+      constructor(config) {
+        this.loader = void 0;
+        this.loader = new Ctor(config);
+      }
+      get stats() {
+        return this.loader.stats;
+      }
+      get context() {
+        return this.loader.context;
+      }
+      destroy() {
+        this.loader.destroy();
+      }
+      abort() {
+        this.loader.abort();
+      }
+      load(context, config, callbacks) {
+        apply(context);
+        this.loader.load(context, config, callbacks);
+      }
+    };
+  }
+
+  /**
+   * Create a playlist loader
+   */
+  createFragmentLoader() {
+    const {
+      fLoader
+    } = this.config;
+    const apply = this.applyFragmentData;
+    const Ctor = fLoader || this.config.loader;
+    return class CmcdFragmentLoader {
+      constructor(config) {
+        this.loader = void 0;
+        this.loader = new Ctor(config);
+      }
+      get stats() {
+        return this.loader.stats;
+      }
+      get context() {
+        return this.loader.context;
+      }
+      destroy() {
+        this.loader.destroy();
+      }
+      abort() {
+        this.loader.abort();
+      }
+      load(context, config, callbacks) {
+        apply(context);
+        this.loader.load(context, config, callbacks);
+      }
+    };
+  }
+}
+
+const PATHWAY_PENALTY_DURATION_MS = 300000;
+class ContentSteeringController extends Logger {
+  constructor(hls) {
+    super('content-steering', hls.logger);
+    this.hls = void 0;
+    this.loader = null;
+    this.uri = null;
+    this.pathwayId = '.';
+    this._pathwayPriority = null;
+    this.timeToLoad = 300;
+    this.reloadTimer = -1;
+    this.updated = 0;
+    this.started = false;
+    this.enabled = true;
+    this.levels = null;
+    this.audioTracks = null;
+    this.subtitleTracks = null;
+    this.penalizedPathways = {};
+    this.hls = hls;
+    this.registerListeners();
+  }
+  registerListeners() {
+    const hls = this.hls;
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.on(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const hls = this.hls;
+    if (!hls) {
+      return;
+    }
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.off(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  pathways() {
+    return (this.levels || []).reduce((pathways, level) => {
+      if (pathways.indexOf(level.pathwayId) === -1) {
+        pathways.push(level.pathwayId);
+      }
+      return pathways;
+    }, []);
+  }
+  get pathwayPriority() {
+    return this._pathwayPriority;
+  }
+  set pathwayPriority(pathwayPriority) {
+    this.updatePathwayPriority(pathwayPriority);
+  }
+  startLoad() {
+    this.started = true;
+    this.clearTimeout();
+    if (this.enabled && this.uri) {
+      if (this.updated) {
+        const ttl = this.timeToLoad * 1000 - (performance.now() - this.updated);
+        if (ttl > 0) {
+          this.scheduleRefresh(this.uri, ttl);
+          return;
+        }
+      }
+      this.loadSteeringManifest(this.uri);
+    }
+  }
+  stopLoad() {
+    this.started = false;
+    if (this.loader) {
+      this.loader.destroy();
+      this.loader = null;
+    }
+    this.clearTimeout();
+  }
+  clearTimeout() {
+    if (this.reloadTimer !== -1) {
+      self.clearTimeout(this.reloadTimer);
+      this.reloadTimer = -1;
+    }
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.stopLoad();
+    // @ts-ignore
+    this.hls = null;
+    this.levels = this.audioTracks = this.subtitleTracks = null;
+  }
+  removeLevel(levelToRemove) {
+    const levels = this.levels;
+    if (levels) {
+      this.levels = levels.filter(level => level !== levelToRemove);
+    }
+  }
+  onManifestLoading() {
+    this.stopLoad();
+    this.enabled = true;
+    this.timeToLoad = 300;
+    this.updated = 0;
+    this.uri = null;
+    this.pathwayId = '.';
+    this.levels = this.audioTracks = this.subtitleTracks = null;
+  }
+  onManifestLoaded(event, data) {
+    const {
+      contentSteering
+    } = data;
+    if (contentSteering === null) {
+      return;
+    }
+    this.pathwayId = contentSteering.pathwayId;
+    this.uri = contentSteering.uri;
+    if (this.started) {
+      this.startLoad();
+    }
+  }
+  onManifestParsed(event, data) {
+    this.audioTracks = data.audioTracks;
+    this.subtitleTracks = data.subtitleTracks;
+  }
+  onError(event, data) {
+    const {
+      errorAction
+    } = data;
+    if ((errorAction == null ? void 0 : errorAction.action) === NetworkErrorAction.SendAlternateToPenaltyBox && errorAction.flags === ErrorActionFlags.MoveAllAlternatesMatchingHost) {
+      const levels = this.levels;
+      let pathwayPriority = this._pathwayPriority;
+      let errorPathway = this.pathwayId;
+      if (data.context) {
+        const {
+          groupId,
+          pathwayId,
+          type
+        } = data.context;
+        if (groupId && levels) {
+          errorPathway = this.getPathwayForGroupId(groupId, type, errorPathway);
+        } else if (pathwayId) {
+          errorPathway = pathwayId;
+        }
+      }
+      if (!(errorPathway in this.penalizedPathways)) {
+        this.penalizedPathways[errorPathway] = performance.now();
+      }
+      if (!pathwayPriority && levels) {
+        // If PATHWAY-PRIORITY was not provided, list pathways for error handling
+        pathwayPriority = this.pathways();
+      }
+      if (pathwayPriority && pathwayPriority.length > 1) {
+        this.updatePathwayPriority(pathwayPriority);
+        errorAction.resolved = this.pathwayId !== errorPathway;
+      }
+      if (data.details === ErrorDetails.BUFFER_APPEND_ERROR && !data.fatal) {
+        // Error will become fatal in buffer-controller when reaching `appendErrorMaxRetry`
+        // Stream-controllers are expected to reduce buffer length even if this is not deemed a QuotaExceededError
+        errorAction.resolved = true;
+      } else if (!errorAction.resolved) {
+        this.warn(`Could not resolve ${data.details} ("${data.error.message}") with content-steering for Pathway: ${errorPathway} levels: ${levels ? levels.length : levels} priorities: ${stringify(pathwayPriority)} penalized: ${stringify(this.penalizedPathways)}`);
+      }
+    }
+  }
+  filterParsedLevels(levels) {
+    // Filter levels to only include those that are in the initial pathway
+    this.levels = levels;
+    let pathwayLevels = this.getLevelsForPathway(this.pathwayId);
+    if (pathwayLevels.length === 0) {
+      const pathwayId = levels[0].pathwayId;
+      this.log(`No levels found in Pathway ${this.pathwayId}. Setting initial Pathway to "${pathwayId}"`);
+      pathwayLevels = this.getLevelsForPathway(pathwayId);
+      this.pathwayId = pathwayId;
+    }
+    if (pathwayLevels.length !== levels.length) {
+      this.log(`Found ${pathwayLevels.length}/${levels.length} levels in Pathway "${this.pathwayId}"`);
+    }
+    return pathwayLevels;
+  }
+  getLevelsForPathway(pathwayId) {
+    if (this.levels === null) {
+      return [];
+    }
+    return this.levels.filter(level => pathwayId === level.pathwayId);
+  }
+  updatePathwayPriority(pathwayPriority) {
+    this._pathwayPriority = pathwayPriority;
+    let levels;
+
+    // Evaluate if we should remove the pathway from the penalized list
+    const penalizedPathways = this.penalizedPathways;
+    const now = performance.now();
+    Object.keys(penalizedPathways).forEach(pathwayId => {
+      if (now - penalizedPathways[pathwayId] > PATHWAY_PENALTY_DURATION_MS) {
+        delete penalizedPathways[pathwayId];
+      }
+    });
+    for (let i = 0; i < pathwayPriority.length; i++) {
+      const pathwayId = pathwayPriority[i];
+      if (pathwayId in penalizedPathways) {
+        continue;
+      }
+      if (pathwayId === this.pathwayId) {
+        return;
+      }
+      const selectedIndex = this.hls.nextLoadLevel;
+      const selectedLevel = this.hls.levels[selectedIndex];
+      levels = this.getLevelsForPathway(pathwayId);
+      if (levels.length > 0) {
+        this.log(`Setting Pathway to "${pathwayId}"`);
+        this.pathwayId = pathwayId;
+        reassignFragmentLevelIndexes(levels);
+        this.hls.trigger(Events.LEVELS_UPDATED, {
+          levels
+        });
+        // Set LevelController's level to trigger LEVEL_SWITCHING which loads playlist if needed
+        const levelAfterChange = this.hls.levels[selectedIndex];
+        if (selectedLevel && levelAfterChange && this.levels) {
+          if (levelAfterChange.attrs['STABLE-VARIANT-ID'] !== selectedLevel.attrs['STABLE-VARIANT-ID'] && levelAfterChange.bitrate !== selectedLevel.bitrate) {
+            this.log(`Unstable Pathways change from bitrate ${selectedLevel.bitrate} to ${levelAfterChange.bitrate}`);
+          }
+          this.hls.nextLoadLevel = selectedIndex;
+        }
+        break;
+      }
+    }
+  }
+  getPathwayForGroupId(groupId, type, defaultPathway) {
+    const levels = this.getLevelsForPathway(defaultPathway).concat(this.levels || []);
+    for (let i = 0; i < levels.length; i++) {
+      if (type === PlaylistContextType.AUDIO_TRACK && levels[i].hasAudioGroup(groupId) || type === PlaylistContextType.SUBTITLE_TRACK && levels[i].hasSubtitleGroup(groupId)) {
+        return levels[i].pathwayId;
+      }
+    }
+    return defaultPathway;
+  }
+  clonePathways(pathwayClones) {
+    const levels = this.levels;
+    if (!levels) {
+      return;
+    }
+    const audioGroupCloneMap = {};
+    const subtitleGroupCloneMap = {};
+    pathwayClones.forEach(pathwayClone => {
+      const {
+        ID: cloneId,
+        'BASE-ID': baseId,
+        'URI-REPLACEMENT': uriReplacement
+      } = pathwayClone;
+      if (levels.some(level => level.pathwayId === cloneId)) {
+        return;
+      }
+      const clonedVariants = this.getLevelsForPathway(baseId).map(baseLevel => {
+        const attributes = new AttrList(baseLevel.attrs);
+        attributes['PATHWAY-ID'] = cloneId;
+        const clonedAudioGroupId = attributes.AUDIO && `${attributes.AUDIO}_clone_${cloneId}`;
+        const clonedSubtitleGroupId = attributes.SUBTITLES && `${attributes.SUBTITLES}_clone_${cloneId}`;
+        if (clonedAudioGroupId) {
+          audioGroupCloneMap[attributes.AUDIO] = clonedAudioGroupId;
+          attributes.AUDIO = clonedAudioGroupId;
+        }
+        if (clonedSubtitleGroupId) {
+          subtitleGroupCloneMap[attributes.SUBTITLES] = clonedSubtitleGroupId;
+          attributes.SUBTITLES = clonedSubtitleGroupId;
+        }
+        const url = performUriReplacement(baseLevel.uri, attributes['STABLE-VARIANT-ID'], 'PER-VARIANT-URIS', uriReplacement);
+        const clonedLevel = new Level({
+          attrs: attributes,
+          audioCodec: baseLevel.audioCodec,
+          bitrate: baseLevel.bitrate,
+          height: baseLevel.height,
+          name: baseLevel.name,
+          url,
+          videoCodec: baseLevel.videoCodec,
+          width: baseLevel.width
+        });
+        if (baseLevel.audioGroups) {
+          for (let i = 1; i < baseLevel.audioGroups.length; i++) {
+            clonedLevel.addGroupId('audio', `${baseLevel.audioGroups[i]}_clone_${cloneId}`);
+          }
+        }
+        if (baseLevel.subtitleGroups) {
+          for (let i = 1; i < baseLevel.subtitleGroups.length; i++) {
+            clonedLevel.addGroupId('text', `${baseLevel.subtitleGroups[i]}_clone_${cloneId}`);
+          }
+        }
+        return clonedLevel;
+      });
+      levels.push(...clonedVariants);
+      cloneRenditionGroups(this.audioTracks, audioGroupCloneMap, uriReplacement, cloneId);
+      cloneRenditionGroups(this.subtitleTracks, subtitleGroupCloneMap, uriReplacement, cloneId);
+    });
+  }
+  loadSteeringManifest(uri) {
+    const config = this.hls.config;
+    const Loader = config.loader;
+    if (this.loader) {
+      this.loader.destroy();
+    }
+    this.loader = new Loader(config);
+    let url;
+    try {
+      url = new self.URL(uri);
+    } catch (error) {
+      this.enabled = false;
+      this.log(`Failed to parse Steering Manifest URI: ${uri}`);
+      return;
+    }
+    if (url.protocol !== 'data:') {
+      const throughput = (this.hls.bandwidthEstimate || config.abrEwmaDefaultEstimate) | 0;
+      url.searchParams.set('_HLS_pathway', this.pathwayId);
+      url.searchParams.set('_HLS_throughput', '' + throughput);
+    }
+    const context = {
+      responseType: 'json',
+      url: url.href
+    };
+    const loadPolicy = config.steeringManifestLoadPolicy.default;
+    const legacyRetryCompatibility = loadPolicy.errorRetry || loadPolicy.timeoutRetry || {};
+    const loaderConfig = {
+      loadPolicy,
+      timeout: loadPolicy.maxLoadTimeMs,
+      maxRetry: legacyRetryCompatibility.maxNumRetry || 0,
+      retryDelay: legacyRetryCompatibility.retryDelayMs || 0,
+      maxRetryDelay: legacyRetryCompatibility.maxRetryDelayMs || 0
+    };
+    const callbacks = {
+      onSuccess: (response, stats, context, networkDetails) => {
+        this.log(`Loaded steering manifest: "${url}"`);
+        const steeringData = response.data;
+        if ((steeringData == null ? void 0 : steeringData.VERSION) !== 1) {
+          this.log(`Steering VERSION ${steeringData.VERSION} not supported!`);
+          return;
+        }
+        this.updated = performance.now();
+        this.timeToLoad = steeringData.TTL;
+        const {
+          'RELOAD-URI': reloadUri,
+          'PATHWAY-CLONES': pathwayClones,
+          'PATHWAY-PRIORITY': pathwayPriority
+        } = steeringData;
+        if (reloadUri) {
+          try {
+            this.uri = new self.URL(reloadUri, url).href;
+          } catch (error) {
+            this.enabled = false;
+            this.log(`Failed to parse Steering Manifest RELOAD-URI: ${reloadUri}`);
+            return;
+          }
+        }
+        this.scheduleRefresh(this.uri || context.url);
+        if (pathwayClones) {
+          this.clonePathways(pathwayClones);
+        }
+        const loadedSteeringData = {
+          steeringManifest: steeringData,
+          url: url.toString()
+        };
+        this.hls.trigger(Events.STEERING_MANIFEST_LOADED, loadedSteeringData);
+        if (pathwayPriority) {
+          this.updatePathwayPriority(pathwayPriority);
+        }
+      },
+      onError: (error, context, networkDetails, stats) => {
+        this.log(`Error loading steering manifest: ${error.code} ${error.text} (${context.url})`);
+        this.stopLoad();
+        if (error.code === 410) {
+          this.enabled = false;
+          this.log(`Steering manifest ${context.url} no longer available`);
+          return;
+        }
+        let ttl = this.timeToLoad * 1000;
+        if (error.code === 429) {
+          const loader = this.loader;
+          if (typeof (loader == null ? void 0 : loader.getResponseHeader) === 'function') {
+            const retryAfter = loader.getResponseHeader('Retry-After');
+            if (retryAfter) {
+              ttl = parseFloat(retryAfter) * 1000;
+            }
+          }
+          this.log(`Steering manifest ${context.url} rate limited`);
+          return;
+        }
+        this.scheduleRefresh(this.uri || context.url, ttl);
+      },
+      onTimeout: (stats, context, networkDetails) => {
+        this.log(`Timeout loading steering manifest (${context.url})`);
+        this.scheduleRefresh(this.uri || context.url);
+      }
+    };
+    this.log(`Requesting steering manifest: ${url}`);
+    this.loader.load(context, loaderConfig, callbacks);
+  }
+  scheduleRefresh(uri, ttlMs = this.timeToLoad * 1000) {
+    this.clearTimeout();
+    this.reloadTimer = self.setTimeout(() => {
+      var _this$hls;
+      const media = (_this$hls = this.hls) == null ? void 0 : _this$hls.media;
+      if (media && !media.ended) {
+        this.loadSteeringManifest(uri);
+        return;
+      }
+      this.scheduleRefresh(uri, this.timeToLoad * 1000);
+    }, ttlMs);
+  }
+}
+function cloneRenditionGroups(tracks, groupCloneMap, uriReplacement, cloneId) {
+  if (!tracks) {
+    return;
+  }
+  Object.keys(groupCloneMap).forEach(audioGroupId => {
+    const clonedTracks = tracks.filter(track => track.groupId === audioGroupId).map(track => {
+      const clonedTrack = _extends({}, track);
+      clonedTrack.details = undefined;
+      clonedTrack.attrs = new AttrList(clonedTrack.attrs);
+      clonedTrack.url = clonedTrack.attrs.URI = performUriReplacement(track.url, track.attrs['STABLE-RENDITION-ID'], 'PER-RENDITION-URIS', uriReplacement);
+      clonedTrack.groupId = clonedTrack.attrs['GROUP-ID'] = groupCloneMap[audioGroupId];
+      clonedTrack.attrs['PATHWAY-ID'] = cloneId;
+      return clonedTrack;
+    });
+    tracks.push(...clonedTracks);
+  });
+}
+function performUriReplacement(uri, stableId, perOptionKey, uriReplacement) {
+  const {
+    HOST: host,
+    PARAMS: params,
+    [perOptionKey]: perOptionUris
+  } = uriReplacement;
+  let perVariantUri;
+  if (stableId) {
+    perVariantUri = perOptionUris == null ? void 0 : perOptionUris[stableId];
+    if (perVariantUri) {
+      uri = perVariantUri;
+    }
+  }
+  const url = new self.URL(uri);
+  if (host && !perVariantUri) {
+    url.host = host;
+  }
+  if (params) {
+    Object.keys(params).sort().forEach(key => {
+      if (key) {
+        url.searchParams.set(key, params[key]);
+      }
+    });
+  }
+  return url.href;
+}
+
+/**
+ * Controller to deal with encrypted media extensions (EME)
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/Encrypted_Media_Extensions_API
+ *
+ * @class
+ * @constructor
+ */
+class EMEController extends Logger {
+  constructor(hls) {
+    super('eme', hls.logger);
+    this.hls = void 0;
+    this.config = void 0;
+    this.media = null;
+    this.mediaResolved = void 0;
+    this.keyFormatPromise = null;
+    this.keySystemAccessPromises = {};
+    this._requestLicenseFailureCount = 0;
+    this.mediaKeySessions = [];
+    this.keyIdToKeySessionPromise = {};
+    this.mediaKeys = null;
+    this.setMediaKeysQueue = EMEController.CDMCleanupPromise ? [EMEController.CDMCleanupPromise] : [];
+    this.bannedKeyIds = {};
+    this.onMediaEncrypted = event => {
+      const {
+        initDataType,
+        initData
+      } = event;
+      const logMessage = `"${event.type}" event: init data type: "${initDataType}"`;
+      this.debug(logMessage);
+
+      // Ignore event when initData is null
+      if (initData === null) {
+        return;
+      }
+      if (!this.keyFormatPromise) {
+        let keySystems = Object.keys(this.keySystemAccessPromises);
+        if (!keySystems.length) {
+          keySystems = getKeySystemsForConfig(this.config);
+        }
+        const keyFormats = keySystems.map(keySystemDomainToKeySystemFormat).filter(k => !!k);
+        this.keyFormatPromise = this.getKeyFormatPromise(keyFormats);
+      }
+      this.keyFormatPromise.then(keySystemFormat => {
+        const keySystem = keySystemFormatToKeySystemDomain(keySystemFormat);
+        if (initDataType !== 'sinf' || keySystem !== KeySystems.FAIRPLAY) {
+          this.log(`Ignoring "${event.type}" event with init data type: "${initDataType}" for selected key-system ${keySystem}`);
+          return;
+        }
+
+        // Match sinf keyId to playlist skd://keyId=
+        let keyId;
+        try {
+          const json = bin2str(new Uint8Array(initData));
+          const sinf = base64Decode(JSON.parse(json).sinf);
+          const tenc = parseSinf(sinf);
+          if (!tenc) {
+            throw new Error(`'schm' box missing or not cbcs/cenc with schi > tenc`);
+          }
+          keyId = new Uint8Array(tenc.subarray(8, 24));
+        } catch (error) {
+          this.warn(`${logMessage} Failed to parse sinf: ${error}`);
+          return;
+        }
+        const keyIdHex = arrayToHex(keyId);
+        const {
+          keyIdToKeySessionPromise,
+          mediaKeySessions
+        } = this;
+        let keySessionContextPromise = keyIdToKeySessionPromise[keyIdHex];
+        for (let i = 0; i < mediaKeySessions.length; i++) {
+          // Match playlist key
+          const keyContext = mediaKeySessions[i];
+          const decryptdata = keyContext.decryptdata;
+          if (!decryptdata.keyId) {
+            continue;
+          }
+          const oldKeyIdHex = arrayToHex(decryptdata.keyId);
+          if (arrayValuesMatch(keyId, decryptdata.keyId) || decryptdata.uri.replace(/-/g, '').indexOf(keyIdHex) !== -1) {
+            keySessionContextPromise = keyIdToKeySessionPromise[oldKeyIdHex];
+            if (!keySessionContextPromise) {
+              continue;
+            }
+            if (decryptdata.pssh) {
+              break;
+            }
+            delete keyIdToKeySessionPromise[oldKeyIdHex];
+            decryptdata.pssh = new Uint8Array(initData);
+            decryptdata.keyId = keyId;
+            keySessionContextPromise = keyIdToKeySessionPromise[keyIdHex] = keySessionContextPromise.then(() => {
+              return this.generateRequestWithPreferredKeySession(keyContext, initDataType, initData, 'encrypted-event-key-match');
+            });
+            keySessionContextPromise.catch(error => this.handleError(error));
+            break;
+          }
+        }
+        if (!keySessionContextPromise) {
+          this.handleError(new Error(`Key ID ${keyIdHex} not encountered in playlist. Key-system sessions ${mediaKeySessions.length}.`));
+        }
+      }).catch(error => this.handleError(error));
+    };
+    this.onWaitingForKey = event => {
+      this.log(`"${event.type}" event`);
+    };
+    this.hls = hls;
+    this.config = hls.config;
+    this.registerListeners();
+  }
+  destroy() {
+    this.onDestroying();
+    this.onMediaDetached();
+    // Remove any references that could be held in config options or callbacks
+    const config = this.config;
+    config.requestMediaKeySystemAccessFunc = null;
+    config.licenseXhrSetup = config.licenseResponseCallback = undefined;
+    config.drmSystems = config.drmSystemOptions = {};
+    // @ts-ignore
+    this.hls = this.config = this.keyIdToKeySessionPromise = null;
+    // @ts-ignore
+    this.onMediaEncrypted = this.onWaitingForKey = null;
+  }
+  registerListeners() {
+    this.hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    this.hls.on(Events.MEDIA_DETACHED, this.onMediaDetached, this);
+    this.hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    this.hls.on(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    this.hls.on(Events.DESTROYING, this.onDestroying, this);
+  }
+  unregisterListeners() {
+    this.hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    this.hls.off(Events.MEDIA_DETACHED, this.onMediaDetached, this);
+    this.hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    this.hls.off(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    this.hls.off(Events.DESTROYING, this.onDestroying, this);
+  }
+  getLicenseServerUrl(keySystem) {
+    const {
+      drmSystems,
+      widevineLicenseUrl
+    } = this.config;
+    const keySystemConfiguration = drmSystems == null ? void 0 : drmSystems[keySystem];
+    if (keySystemConfiguration) {
+      return keySystemConfiguration.licenseUrl;
+    }
+
+    // For backward compatibility
+    if (keySystem === KeySystems.WIDEVINE && widevineLicenseUrl) {
+      return widevineLicenseUrl;
+    }
+  }
+  getLicenseServerUrlOrThrow(keySystem) {
+    const url = this.getLicenseServerUrl(keySystem);
+    if (url === undefined) {
+      throw new Error(`no license server URL configured for key-system "${keySystem}"`);
+    }
+    return url;
+  }
+  getServerCertificateUrl(keySystem) {
+    const {
+      drmSystems
+    } = this.config;
+    const keySystemConfiguration = drmSystems == null ? void 0 : drmSystems[keySystem];
+    if (keySystemConfiguration) {
+      return keySystemConfiguration.serverCertificateUrl;
+    } else {
+      this.log(`No Server Certificate in config.drmSystems["${keySystem}"]`);
+    }
+  }
+  attemptKeySystemAccess(keySystemsToAttempt) {
+    const levels = this.hls.levels;
+    const uniqueCodec = (value, i, a) => !!value && a.indexOf(value) === i;
+    const audioCodecs = levels.map(level => level.audioCodec).filter(uniqueCodec);
+    const videoCodecs = levels.map(level => level.videoCodec).filter(uniqueCodec);
+    if (audioCodecs.length + videoCodecs.length === 0) {
+      videoCodecs.push('avc1.42e01e');
+    }
+    return new Promise((resolve, reject) => {
+      const attempt = keySystems => {
+        const keySystem = keySystems.shift();
+        this.getMediaKeysPromise(keySystem, audioCodecs, videoCodecs).then(mediaKeys => resolve({
+          keySystem,
+          mediaKeys
+        })).catch(error => {
+          if (keySystems.length) {
+            attempt(keySystems);
+          } else if (error instanceof EMEKeyError) {
+            reject(error);
+          } else {
+            reject(new EMEKeyError({
+              type: ErrorTypes.KEY_SYSTEM_ERROR,
+              details: ErrorDetails.KEY_SYSTEM_NO_ACCESS,
+              error,
+              fatal: true
+            }, error.message));
+          }
+        });
+      };
+      attempt(keySystemsToAttempt);
+    });
+  }
+  requestMediaKeySystemAccess(keySystem, supportedConfigurations) {
+    const {
+      requestMediaKeySystemAccessFunc
+    } = this.config;
+    if (!(typeof requestMediaKeySystemAccessFunc === 'function')) {
+      let errMessage = `Configured requestMediaKeySystemAccess is not a function ${requestMediaKeySystemAccessFunc}`;
+      if (requestMediaKeySystemAccess === null && self.location.protocol === 'http:') {
+        errMessage = `navigator.requestMediaKeySystemAccess is not available over insecure protocol ${location.protocol}`;
+      }
+      return Promise.reject(new Error(errMessage));
+    }
+    return requestMediaKeySystemAccessFunc(keySystem, supportedConfigurations);
+  }
+  getMediaKeysPromise(keySystem, audioCodecs, videoCodecs) {
+    var _keySystemAccessPromi;
+    // This can throw, but is caught in event handler callpath
+    const mediaKeySystemConfigs = getSupportedMediaKeySystemConfigurations(keySystem, audioCodecs, videoCodecs, this.config.drmSystemOptions || {});
+    let keySystemAccessPromises = this.keySystemAccessPromises[keySystem];
+    let keySystemAccess = (_keySystemAccessPromi = keySystemAccessPromises) == null ? void 0 : _keySystemAccessPromi.keySystemAccess;
+    if (!keySystemAccess) {
+      this.log(`Requesting encrypted media "${keySystem}" key-system access with config: ${stringify(mediaKeySystemConfigs)}`);
+      keySystemAccess = this.requestMediaKeySystemAccess(keySystem, mediaKeySystemConfigs);
+      const keySystemAccessPromisesNew = keySystemAccessPromises = this.keySystemAccessPromises[keySystem] = {
+        keySystemAccess
+      };
+      keySystemAccess.catch(error => {
+        this.log(`Failed to obtain access to key-system "${keySystem}": ${error}`);
+      });
+      return keySystemAccess.then(mediaKeySystemAccess => {
+        this.log(`Access for key-system "${mediaKeySystemAccess.keySystem}" obtained`);
+        const certificateRequest = this.fetchServerCertificate(keySystem);
+        this.log(`Create media-keys for "${keySystem}"`);
+        const mediaKeys = keySystemAccessPromisesNew.mediaKeys = mediaKeySystemAccess.createMediaKeys().then(mediaKeys => {
+          this.log(`Media-keys created for "${keySystem}"`);
+          keySystemAccessPromisesNew.hasMediaKeys = true;
+          return certificateRequest.then(certificate => {
+            if (certificate) {
+              return this.setMediaKeysServerCertificate(mediaKeys, keySystem, certificate);
+            }
+            return mediaKeys;
+          });
+        });
+        mediaKeys.catch(error => {
+          this.error(`Failed to create media-keys for "${keySystem}"}: ${error}`);
+        });
+        return mediaKeys;
+      });
+    }
+    return keySystemAccess.then(() => keySystemAccessPromises.mediaKeys);
+  }
+  createMediaKeySessionContext({
+    decryptdata,
+    keySystem,
+    mediaKeys
+  }) {
+    this.log(`Creating key-system session "${keySystem}" keyId: ${arrayToHex(decryptdata.keyId || [])} keyUri: ${decryptdata.uri}`);
+    const mediaKeysSession = mediaKeys.createSession();
+    const mediaKeySessionContext = {
+      decryptdata,
+      keySystem,
+      mediaKeys,
+      mediaKeysSession,
+      keyStatus: 'status-pending'
+    };
+    this.mediaKeySessions.push(mediaKeySessionContext);
+    return mediaKeySessionContext;
+  }
+  renewKeySession(mediaKeySessionContext) {
+    const decryptdata = mediaKeySessionContext.decryptdata;
+    if (decryptdata.pssh) {
+      const keySessionContext = this.createMediaKeySessionContext(mediaKeySessionContext);
+      const keyId = getKeyIdString(decryptdata);
+      const scheme = 'cenc';
+      this.keyIdToKeySessionPromise[keyId] = this.generateRequestWithPreferredKeySession(keySessionContext, scheme, decryptdata.pssh.buffer, 'expired');
+    } else {
+      this.warn(`Could not renew expired session. Missing pssh initData.`);
+    }
+    // eslint-disable-next-line @typescript-eslint/no-floating-promises
+    this.removeSession(mediaKeySessionContext);
+  }
+  updateKeySession(mediaKeySessionContext, data) {
+    const keySession = mediaKeySessionContext.mediaKeysSession;
+    this.log(`Updating key-session "${keySession.sessionId}" for keyId ${arrayToHex(mediaKeySessionContext.decryptdata.keyId || [])}
+      } (data length: ${data.byteLength})`);
+    return keySession.update(data);
+  }
+  getSelectedKeySystemFormats() {
+    return Object.keys(this.keySystemAccessPromises).map(keySystem => ({
+      keySystem,
+      hasMediaKeys: this.keySystemAccessPromises[keySystem].hasMediaKeys
+    })).filter(({
+      hasMediaKeys
+    }) => !!hasMediaKeys).map(({
+      keySystem
+    }) => keySystemDomainToKeySystemFormat(keySystem)).filter(keySystem => !!keySystem);
+  }
+  getKeySystemAccess(keySystemsToAttempt) {
+    return this.getKeySystemSelectionPromise(keySystemsToAttempt).then(({
+      keySystem,
+      mediaKeys
+    }) => {
+      return this.attemptSetMediaKeys(keySystem, mediaKeys);
+    });
+  }
+  selectKeySystem(keySystemsToAttempt) {
+    return new Promise((resolve, reject) => {
+      this.getKeySystemSelectionPromise(keySystemsToAttempt).then(({
+        keySystem
+      }) => {
+        const keySystemFormat = keySystemDomainToKeySystemFormat(keySystem);
+        if (keySystemFormat) {
+          resolve(keySystemFormat);
+        } else {
+          reject(new Error(`Unable to find format for key-system "${keySystem}"`));
+        }
+      }).catch(reject);
+    });
+  }
+  selectKeySystemFormat(frag) {
+    const keyFormats = Object.keys(frag.levelkeys || {});
+    if (!this.keyFormatPromise) {
+      this.log(`Selecting key-system from fragment (sn: ${frag.sn} ${frag.type}: ${frag.level}) key formats ${keyFormats.join(', ')}`);
+      this.keyFormatPromise = this.getKeyFormatPromise(keyFormats);
+    }
+    return this.keyFormatPromise;
+  }
+  getKeyFormatPromise(keyFormats) {
+    const keySystemsInConfig = getKeySystemsForConfig(this.config);
+    const keySystemsToAttempt = keyFormats.map(keySystemFormatToKeySystemDomain).filter(value => !!value && keySystemsInConfig.indexOf(value) !== -1);
+    return this.selectKeySystem(keySystemsToAttempt);
+  }
+  getKeyStatus(decryptdata) {
+    const {
+      mediaKeySessions
+    } = this;
+    for (let i = 0; i < mediaKeySessions.length; i++) {
+      const status = getKeyStatus(decryptdata, mediaKeySessions[i]);
+      if (status) {
+        return status;
+      }
+    }
+    return undefined;
+  }
+  loadKey(data) {
+    const decryptdata = data.keyInfo.decryptdata;
+    const keyId = getKeyIdString(decryptdata);
+    const badStatus = this.bannedKeyIds[keyId];
+    if (badStatus || this.getKeyStatus(decryptdata) === 'internal-error') {
+      const error = getKeyStatusError(badStatus || 'internal-error', decryptdata);
+      this.handleError(error, data.frag);
+      return Promise.reject(error);
+    }
+    const keyDetails = `(keyId: ${keyId} format: "${decryptdata.keyFormat}" method: ${decryptdata.method} uri: ${decryptdata.uri})`;
+    this.log(`Starting session for key ${keyDetails}`);
+    const keyContextPromise = this.keyIdToKeySessionPromise[keyId];
+    if (!keyContextPromise) {
+      const keySessionContextPromise = this.getKeySystemForKeyPromise(decryptdata).then(({
+        keySystem,
+        mediaKeys
+      }) => {
+        this.throwIfDestroyed();
+        this.log(`Handle encrypted media sn: ${data.frag.sn} ${data.frag.type}: ${data.frag.level} using key ${keyDetails}`);
+        return this.attemptSetMediaKeys(keySystem, mediaKeys).then(() => {
+          this.throwIfDestroyed();
+          return this.createMediaKeySessionContext({
+            keySystem,
+            mediaKeys,
+            decryptdata
+          });
+        });
+      }).then(keySessionContext => {
+        const scheme = 'cenc';
+        const initData = decryptdata.pssh ? decryptdata.pssh.buffer : null;
+        return this.generateRequestWithPreferredKeySession(keySessionContext, scheme, initData, 'playlist-key');
+      });
+      keySessionContextPromise.catch(error => this.handleError(error, data.frag));
+      this.keyIdToKeySessionPromise[keyId] = keySessionContextPromise;
+      return keySessionContextPromise;
+    }
+
+    // Re-emit error for playlist key loading
+    keyContextPromise.catch(error => {
+      if (error instanceof EMEKeyError) {
+        const errorData = _objectSpread2({}, error.data);
+        if (this.getKeyStatus(decryptdata) === 'internal-error') {
+          errorData.decryptdata = decryptdata;
+        }
+        const clonedError = new EMEKeyError(errorData, error.message);
+        this.handleError(clonedError, data.frag);
+      }
+    });
+    return keyContextPromise;
+  }
+  throwIfDestroyed(message = 'Invalid state') {
+    if (!this.hls) {
+      throw new Error('invalid state');
+    }
+  }
+  handleError(error, frag) {
+    if (!this.hls) {
+      return;
+    }
+    if (error instanceof EMEKeyError) {
+      if (frag) {
+        error.data.frag = frag;
+      }
+      const levelKey = error.data.decryptdata;
+      this.error(`${error.message}${levelKey ? ` (${arrayToHex(levelKey.keyId || [])})` : ''}`);
+      this.hls.trigger(Events.ERROR, error.data);
+    } else {
+      this.error(error.message);
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.KEY_SYSTEM_ERROR,
+        details: ErrorDetails.KEY_SYSTEM_NO_KEYS,
+        error,
+        fatal: true
+      });
+    }
+  }
+  getKeySystemForKeyPromise(decryptdata) {
+    const keyId = getKeyIdString(decryptdata);
+    const mediaKeySessionContext = this.keyIdToKeySessionPromise[keyId];
+    if (!mediaKeySessionContext) {
+      const keySystem = keySystemFormatToKeySystemDomain(decryptdata.keyFormat);
+      const keySystemsToAttempt = keySystem ? [keySystem] : getKeySystemsForConfig(this.config);
+      return this.attemptKeySystemAccess(keySystemsToAttempt);
+    }
+    return mediaKeySessionContext;
+  }
+  getKeySystemSelectionPromise(keySystemsToAttempt) {
+    if (!keySystemsToAttempt.length) {
+      keySystemsToAttempt = getKeySystemsForConfig(this.config);
+    }
+    if (keySystemsToAttempt.length === 0) {
+      throw new EMEKeyError({
+        type: ErrorTypes.KEY_SYSTEM_ERROR,
+        details: ErrorDetails.KEY_SYSTEM_NO_CONFIGURED_LICENSE,
+        fatal: true
+      }, `Missing key-system license configuration options ${stringify({
+        drmSystems: this.config.drmSystems
+      })}`);
+    }
+    return this.attemptKeySystemAccess(keySystemsToAttempt);
+  }
+  attemptSetMediaKeys(keySystem, mediaKeys) {
+    this.mediaResolved = undefined;
+    if (this.mediaKeys === mediaKeys) {
+      return Promise.resolve();
+    }
+    const queue = this.setMediaKeysQueue.slice();
+    this.log(`Setting media-keys for "${keySystem}"`);
+    // Only one setMediaKeys() can run at one time, and multiple setMediaKeys() operations
+    // can be queued for execution for multiple key sessions.
+    const setMediaKeysPromise = Promise.all(queue).then(() => {
+      if (!this.media) {
+        return new Promise((resolve, reject) => {
+          this.mediaResolved = () => {
+            this.mediaResolved = undefined;
+            if (!this.media) {
+              return reject(new Error('Attempted to set mediaKeys without media element attached'));
+            }
+            this.mediaKeys = mediaKeys;
+            this.media.setMediaKeys(mediaKeys).then(resolve).catch(reject);
+          };
+        });
+      }
+      return this.media.setMediaKeys(mediaKeys);
+    });
+    this.mediaKeys = mediaKeys;
+    this.setMediaKeysQueue.push(setMediaKeysPromise);
+    return setMediaKeysPromise.then(() => {
+      this.log(`Media-keys set for "${keySystem}"`);
+      queue.push(setMediaKeysPromise);
+      this.setMediaKeysQueue = this.setMediaKeysQueue.filter(p => queue.indexOf(p) === -1);
+    });
+  }
+  generateRequestWithPreferredKeySession(context, initDataType, initData, reason) {
+    var _this$config$drmSyste;
+    const generateRequestFilter = (_this$config$drmSyste = this.config.drmSystems) == null || (_this$config$drmSyste = _this$config$drmSyste[context.keySystem]) == null ? void 0 : _this$config$drmSyste.generateRequest;
+    if (generateRequestFilter) {
+      try {
+        const mappedInitData = generateRequestFilter.call(this.hls, initDataType, initData, context);
+        if (!mappedInitData) {
+          throw new Error('Invalid response from configured generateRequest filter');
+        }
+        initDataType = mappedInitData.initDataType;
+        initData = mappedInitData.initData ? mappedInitData.initData : null;
+        context.decryptdata.pssh = initData ? new Uint8Array(initData) : null;
+      } catch (error) {
+        this.warn(error.message);
+        if (this.hls && this.hls.config.debug) {
+          throw error;
+        }
+      }
+    }
+    if (initData === null) {
+      this.log(`Skipping key-session request for "${reason}" (no initData)`);
+      return Promise.resolve(context);
+    }
+    const keyId = getKeyIdString(context.decryptdata);
+    const keyUri = context.decryptdata.uri;
+    this.log(`Generating key-session request for "${reason}" keyId: ${keyId} URI: ${keyUri} (init data type: ${initDataType} length: ${initData.byteLength})`);
+    const licenseStatus = new EventEmitter();
+    const onmessage = context._onmessage = event => {
+      const keySession = context.mediaKeysSession;
+      if (!keySession) {
+        licenseStatus.emit('error', new Error('invalid state'));
+        return;
+      }
+      const {
+        messageType,
+        message
+      } = event;
+      this.log(`"${messageType}" message event for session "${keySession.sessionId}" message size: ${message.byteLength}`);
+      if (messageType === 'license-request' || messageType === 'license-renewal') {
+        this.renewLicense(context, message).catch(error => {
+          if (licenseStatus.eventNames().length) {
+            licenseStatus.emit('error', error);
+          } else {
+            this.handleError(error);
+          }
+        });
+      } else if (messageType === 'license-release') {
+        if (context.keySystem === KeySystems.FAIRPLAY) {
+          this.updateKeySession(context, strToUtf8array('acknowledged')).then(() => this.removeSession(context)).catch(error => this.handleError(error));
+        }
+      } else {
+        this.warn(`unhandled media key message type "${messageType}"`);
+      }
+    };
+    const handleKeyStatus = (keyStatus, context) => {
+      context.keyStatus = keyStatus;
+      let keyError;
+      if (keyStatus.startsWith('usable')) {
+        licenseStatus.emit('resolved');
+      } else if (keyStatus === 'internal-error' || keyStatus === 'output-restricted' || keyStatus === 'output-downscaled') {
+        keyError = getKeyStatusError(keyStatus, context.decryptdata);
+      } else if (keyStatus === 'expired') {
+        keyError = new Error(`key expired (keyId: ${keyId})`);
+      } else if (keyStatus === 'released') {
+        keyError = new Error(`key released`);
+      } else if (keyStatus === 'status-pending') ; else {
+        this.warn(`unhandled key status change "${keyStatus}" (keyId: ${keyId})`);
+      }
+      if (keyError) {
+        if (licenseStatus.eventNames().length) {
+          licenseStatus.emit('error', keyError);
+        } else {
+          this.handleError(keyError);
+        }
+      }
+    };
+    const onkeystatuseschange = context._onkeystatuseschange = event => {
+      const keySession = context.mediaKeysSession;
+      if (!keySession) {
+        licenseStatus.emit('error', new Error('invalid state'));
+        return;
+      }
+      const keyStatuses = this.getKeyStatuses(context);
+      const keyIds = Object.keys(keyStatuses);
+
+      // exit if all keys are status-pending
+      if (!keyIds.some(id => keyStatuses[id] !== 'status-pending')) {
+        return;
+      }
+
+      // renew when a key status for a levelKey comes back expired
+      if (keyStatuses[keyId] === 'expired') {
+        // renew when a key status comes back expired
+        this.log(`Expired key ${stringify(keyStatuses)} in key-session "${context.mediaKeysSession.sessionId}"`);
+        this.renewKeySession(context);
+        return;
+      }
+      let keyStatus = keyStatuses[keyId];
+      if (keyStatus) {
+        // handle status of current key
+        handleKeyStatus(keyStatus, context);
+      } else {
+        var _context$keyStatusTim;
+        // Timeout key-status
+        const timeout = 1000;
+        context.keyStatusTimeouts || (context.keyStatusTimeouts = {});
+        (_context$keyStatusTim = context.keyStatusTimeouts)[keyId] || (_context$keyStatusTim[keyId] = self.setTimeout(() => {
+          if (!context.mediaKeysSession || !this.mediaKeys) {
+            return;
+          }
+
+          // Find key status in another session if missing (PlayReady #7519 no key-status "single-key" setup with shared key)
+          const sessionKeyStatus = this.getKeyStatus(context.decryptdata);
+          if (sessionKeyStatus && sessionKeyStatus !== 'status-pending') {
+            this.log(`No status for keyId ${keyId} in key-session "${context.mediaKeysSession.sessionId}". Using session key-status ${sessionKeyStatus} from other session.`);
+            return handleKeyStatus(sessionKeyStatus, context);
+          }
+
+          // Timeout key with internal-error
+          this.log(`key status for ${keyId} in key-session "${context.mediaKeysSession.sessionId}" timed out after ${timeout}ms`);
+          keyStatus = 'internal-error';
+          handleKeyStatus(keyStatus, context);
+        }, timeout));
+        this.log(`No status for keyId ${keyId} (${stringify(keyStatuses)}).`);
+      }
+    };
+    addEventListener(context.mediaKeysSession, 'message', onmessage);
+    addEventListener(context.mediaKeysSession, 'keystatuseschange', onkeystatuseschange);
+    const keyUsablePromise = new Promise((resolve, reject) => {
+      licenseStatus.on('error', reject);
+      licenseStatus.on('resolved', resolve);
+    });
+    return context.mediaKeysSession.generateRequest(initDataType, initData).then(() => {
+      this.log(`Request generated for key-session "${context.mediaKeysSession.sessionId}" keyId: ${keyId} URI: ${keyUri}`);
+    }).catch(error => {
+      throw new EMEKeyError({
+        type: ErrorTypes.KEY_SYSTEM_ERROR,
+        details: ErrorDetails.KEY_SYSTEM_NO_SESSION,
+        error,
+        decryptdata: context.decryptdata,
+        fatal: false
+      }, `Error generating key-session request: ${error}`);
+    }).then(() => keyUsablePromise).catch(error => {
+      licenseStatus.removeAllListeners();
+      return this.removeSession(context).then(() => {
+        throw error;
+      });
+    }).then(() => {
+      licenseStatus.removeAllListeners();
+      return context;
+    });
+  }
+  getKeyStatuses(mediaKeySessionContext) {
+    const keyStatuses = {};
+    mediaKeySessionContext.mediaKeysSession.keyStatuses.forEach((status, keyId) => {
+      // keyStatuses.forEach is not standard API so the callback value looks weird on xboxone
+      // xboxone callback(keyId, status) so we need to exchange them
+      if (typeof keyId === 'string' && typeof status === 'object') {
+        const temp = keyId;
+        keyId = status;
+        status = temp;
+      }
+      const keyIdArray = 'buffer' in keyId ? new Uint8Array(keyId.buffer, keyId.byteOffset, keyId.byteLength) : new Uint8Array(keyId);
+      if (mediaKeySessionContext.keySystem === KeySystems.PLAYREADY && keyIdArray.length === 16) {
+        // On some devices, the key ID has already been converted for endianness.
+        // In such cases, this key ID is the one we need to cache.
+        const originKeyIdWithStatusChange = arrayToHex(keyIdArray);
+        // Cache the original key IDs to ensure compatibility across all cases.
+        keyStatuses[originKeyIdWithStatusChange] = status;
+        changeEndianness(keyIdArray);
+      }
+      const keyIdWithStatusChange = arrayToHex(keyIdArray);
+      // Add to banned keys to prevent playlist usage and license requests
+      if (status === 'internal-error') {
+        this.bannedKeyIds[keyIdWithStatusChange] = status;
+      }
+      this.log(`key status change "${status}" for keyStatuses keyId: ${keyIdWithStatusChange} key-session "${mediaKeySessionContext.mediaKeysSession.sessionId}"`);
+      keyStatuses[keyIdWithStatusChange] = status;
+    });
+    return keyStatuses;
+  }
+  fetchServerCertificate(keySystem) {
+    const config = this.config;
+    const Loader = config.loader;
+    const certLoader = new Loader(config);
+    const url = this.getServerCertificateUrl(keySystem);
+    if (!url) {
+      return Promise.resolve();
+    }
+    this.log(`Fetching server certificate for "${keySystem}"`);
+    return new Promise((resolve, reject) => {
+      const loaderContext = {
+        responseType: 'arraybuffer',
+        url
+      };
+      const loadPolicy = config.certLoadPolicy.default;
+      const loaderConfig = {
+        loadPolicy,
+        timeout: loadPolicy.maxLoadTimeMs,
+        maxRetry: 0,
+        retryDelay: 0,
+        maxRetryDelay: 0
+      };
+      const loaderCallbacks = {
+        onSuccess: (response, stats, context, networkDetails) => {
+          resolve(response.data);
+        },
+        onError: (response, contex, networkDetails, stats) => {
+          reject(new EMEKeyError({
+            type: ErrorTypes.KEY_SYSTEM_ERROR,
+            details: ErrorDetails.KEY_SYSTEM_SERVER_CERTIFICATE_REQUEST_FAILED,
+            fatal: true,
+            networkDetails,
+            response: _objectSpread2({
+              url: loaderContext.url,
+              data: undefined
+            }, response)
+          }, `"${keySystem}" certificate request failed (${url}). Status: ${response.code} (${response.text})`));
+        },
+        onTimeout: (stats, context, networkDetails) => {
+          reject(new EMEKeyError({
+            type: ErrorTypes.KEY_SYSTEM_ERROR,
+            details: ErrorDetails.KEY_SYSTEM_SERVER_CERTIFICATE_REQUEST_FAILED,
+            fatal: true,
+            networkDetails,
+            response: {
+              url: loaderContext.url,
+              data: undefined
+            }
+          }, `"${keySystem}" certificate request timed out (${url})`));
+        },
+        onAbort: (stats, context, networkDetails) => {
+          reject(new Error('aborted'));
+        }
+      };
+      certLoader.load(loaderContext, loaderConfig, loaderCallbacks);
+    });
+  }
+  setMediaKeysServerCertificate(mediaKeys, keySystem, cert) {
+    return new Promise((resolve, reject) => {
+      mediaKeys.setServerCertificate(cert).then(success => {
+        this.log(`setServerCertificate ${success ? 'success' : 'not supported by CDM'} (${cert.byteLength}) on "${keySystem}"`);
+        resolve(mediaKeys);
+      }).catch(error => {
+        reject(new EMEKeyError({
+          type: ErrorTypes.KEY_SYSTEM_ERROR,
+          details: ErrorDetails.KEY_SYSTEM_SERVER_CERTIFICATE_UPDATE_FAILED,
+          error,
+          fatal: true
+        }, error.message));
+      });
+    });
+  }
+  renewLicense(context, keyMessage) {
+    return this.requestLicense(context, new Uint8Array(keyMessage)).then(data => {
+      return this.updateKeySession(context, new Uint8Array(data)).catch(error => {
+        throw new EMEKeyError({
+          type: ErrorTypes.KEY_SYSTEM_ERROR,
+          details: ErrorDetails.KEY_SYSTEM_SESSION_UPDATE_FAILED,
+          decryptdata: context.decryptdata,
+          error,
+          fatal: false
+        }, error.message);
+      });
+    });
+  }
+  unpackPlayReadyKeyMessage(xhr, licenseChallenge) {
+    // On Edge, the raw license message is UTF-16-encoded XML.  We need
+    // to unpack the Challenge element (base64-encoded string containing the
+    // actual license request) and any HttpHeader elements (sent as request
+    // headers).
+    // For PlayReady CDMs, we need to dig the Challenge out of the XML.
+    const xmlString = String.fromCharCode.apply(null, new Uint16Array(licenseChallenge.buffer));
+    if (!xmlString.includes('PlayReadyKeyMessage')) {
+      // This does not appear to be a wrapped message as on Edge.  Some
+      // clients do not need this unwrapping, so we will assume this is one of
+      // them.  Note that "xml" at this point probably looks like random
+      // garbage, since we interpreted UTF-8 as UTF-16.
+      xhr.setRequestHeader('Content-Type', 'text/xml; charset=utf-8');
+      return licenseChallenge;
+    }
+    const keyMessageXml = new DOMParser().parseFromString(xmlString, 'application/xml');
+    // Set request headers.
+    const headers = keyMessageXml.querySelectorAll('HttpHeader');
+    if (headers.length > 0) {
+      let header;
+      for (let i = 0, len = headers.length; i < len; i++) {
+        var _header$querySelector, _header$querySelector2;
+        header = headers[i];
+        const name = (_header$querySelector = header.querySelector('name')) == null ? void 0 : _header$querySelector.textContent;
+        const value = (_header$querySelector2 = header.querySelector('value')) == null ? void 0 : _header$querySelector2.textContent;
+        if (name && value) {
+          xhr.setRequestHeader(name, value);
+        }
+      }
+    }
+    const challengeElement = keyMessageXml.querySelector('Challenge');
+    const challengeText = challengeElement == null ? void 0 : challengeElement.textContent;
+    if (!challengeText) {
+      throw new Error(`Cannot find <Challenge> in key message`);
+    }
+    return strToUtf8array(atob(challengeText));
+  }
+  setupLicenseXHR(xhr, url, keysListItem, licenseChallenge) {
+    const licenseXhrSetup = this.config.licenseXhrSetup;
+    if (!licenseXhrSetup) {
+      xhr.open('POST', url, true);
+      return Promise.resolve({
+        xhr,
+        licenseChallenge
+      });
+    }
+    return Promise.resolve().then(() => {
+      if (!keysListItem.decryptdata) {
+        throw new Error('Key removed');
+      }
+      return licenseXhrSetup.call(this.hls, xhr, url, keysListItem, licenseChallenge);
+    }).catch(error => {
+      if (!keysListItem.decryptdata) {
+        // Key session removed. Cancel license request.
+        throw error;
+      }
+      // let's try to open before running setup
+      xhr.open('POST', url, true);
+      return licenseXhrSetup.call(this.hls, xhr, url, keysListItem, licenseChallenge);
+    }).then(licenseXhrSetupResult => {
+      // if licenseXhrSetup did not yet call open, let's do it now
+      if (!xhr.readyState) {
+        xhr.open('POST', url, true);
+      }
+      const finalLicenseChallenge = licenseXhrSetupResult ? licenseXhrSetupResult : licenseChallenge;
+      return {
+        xhr,
+        licenseChallenge: finalLicenseChallenge
+      };
+    });
+  }
+  requestLicense(keySessionContext, licenseChallenge) {
+    const keyLoadPolicy = this.config.keyLoadPolicy.default;
+    return new Promise((resolve, reject) => {
+      const url = this.getLicenseServerUrlOrThrow(keySessionContext.keySystem);
+      this.log(`Sending license request to URL: ${url}`);
+      const xhr = new XMLHttpRequest();
+      xhr.responseType = 'arraybuffer';
+      xhr.onreadystatechange = () => {
+        if (!this.hls || !keySessionContext.mediaKeysSession) {
+          return reject(new Error('invalid state'));
+        }
+        if (xhr.readyState === 4) {
+          if (xhr.status === 200) {
+            this._requestLicenseFailureCount = 0;
+            let data = xhr.response;
+            this.log(`License received ${data instanceof ArrayBuffer ? data.byteLength : data}`);
+            const licenseResponseCallback = this.config.licenseResponseCallback;
+            if (licenseResponseCallback) {
+              try {
+                data = licenseResponseCallback.call(this.hls, xhr, url, keySessionContext);
+              } catch (error) {
+                this.error(error);
+              }
+            }
+            resolve(data);
+          } else {
+            const retryConfig = keyLoadPolicy.errorRetry;
+            const maxNumRetry = retryConfig ? retryConfig.maxNumRetry : 0;
+            this._requestLicenseFailureCount++;
+            if (this._requestLicenseFailureCount > maxNumRetry || xhr.status >= 400 && xhr.status < 500) {
+              reject(new EMEKeyError({
+                type: ErrorTypes.KEY_SYSTEM_ERROR,
+                details: ErrorDetails.KEY_SYSTEM_LICENSE_REQUEST_FAILED,
+                decryptdata: keySessionContext.decryptdata,
+                fatal: true,
+                networkDetails: xhr,
+                response: {
+                  url,
+                  data: undefined,
+                  code: xhr.status,
+                  text: xhr.statusText
+                }
+              }, `License Request XHR failed (${url}). Status: ${xhr.status} (${xhr.statusText})`));
+            } else {
+              const attemptsLeft = maxNumRetry - this._requestLicenseFailureCount + 1;
+              this.warn(`Retrying license request, ${attemptsLeft} attempts left`);
+              this.requestLicense(keySessionContext, licenseChallenge).then(resolve, reject);
+            }
+          }
+        }
+      };
+      if (keySessionContext.licenseXhr && keySessionContext.licenseXhr.readyState !== XMLHttpRequest.DONE) {
+        keySessionContext.licenseXhr.abort();
+      }
+      keySessionContext.licenseXhr = xhr;
+      this.setupLicenseXHR(xhr, url, keySessionContext, licenseChallenge).then(({
+        xhr,
+        licenseChallenge
+      }) => {
+        if (keySessionContext.keySystem == KeySystems.PLAYREADY) {
+          licenseChallenge = this.unpackPlayReadyKeyMessage(xhr, licenseChallenge);
+        }
+        xhr.send(licenseChallenge);
+      }).catch(reject);
+    });
+  }
+  onDestroying() {
+    this.unregisterListeners();
+    this._clear();
+  }
+  onMediaAttached(event, data) {
+    if (!this.config.emeEnabled) {
+      return;
+    }
+    const media = data.media;
+
+    // keep reference of media
+    this.media = media;
+    addEventListener(media, 'encrypted', this.onMediaEncrypted);
+    addEventListener(media, 'waitingforkey', this.onWaitingForKey);
+    const mediaResolved = this.mediaResolved;
+    if (mediaResolved) {
+      mediaResolved();
+    } else {
+      this.mediaKeys = media.mediaKeys;
+    }
+  }
+  onMediaDetached() {
+    const media = this.media;
+    if (media) {
+      removeEventListener(media, 'encrypted', this.onMediaEncrypted);
+      removeEventListener(media, 'waitingforkey', this.onWaitingForKey);
+      this.media = null;
+      this.mediaKeys = null;
+    }
+  }
+  _clear() {
+    var _media$setMediaKeys;
+    this._requestLicenseFailureCount = 0;
+    this.keyIdToKeySessionPromise = {};
+    this.bannedKeyIds = {};
+    const mediaResolved = this.mediaResolved;
+    if (mediaResolved) {
+      mediaResolved();
+    }
+    if (!this.mediaKeys && !this.mediaKeySessions.length) {
+      return;
+    }
+    const media = this.media;
+    const mediaKeysList = this.mediaKeySessions.slice();
+    this.mediaKeySessions = [];
+    this.mediaKeys = null;
+    LevelKey.clearKeyUriToKeyIdMap();
+
+    // Close all sessions and remove media keys from the video element.
+    const keySessionCount = mediaKeysList.length;
+    EMEController.CDMCleanupPromise = Promise.all(mediaKeysList.map(mediaKeySessionContext => this.removeSession(mediaKeySessionContext)).concat((media == null || (_media$setMediaKeys = media.setMediaKeys(null)) == null ? void 0 : _media$setMediaKeys.catch(error => {
+      this.log(`Could not clear media keys: ${error}`);
+      if (!this.hls) return;
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.KEY_SYSTEM_DESTROY_MEDIA_KEYS_ERROR,
+        fatal: false,
+        error: new Error(`Could not clear media keys: ${error}`)
+      });
+    })) || Promise.resolve())).catch(error => {
+      this.log(`Could not close sessions and clear media keys: ${error}`);
+      if (!this.hls) return;
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.KEY_SYSTEM_DESTROY_CLOSE_SESSION_ERROR,
+        fatal: false,
+        error: new Error(`Could not close sessions and clear media keys: ${error}`)
+      });
+    }).then(() => {
+      if (keySessionCount) {
+        this.log('finished closing key sessions and clearing media keys');
+      }
+    });
+  }
+  onManifestLoading() {
+    this._clear();
+  }
+  onManifestLoaded(event, {
+    sessionKeys
+  }) {
+    if (!sessionKeys || !this.config.emeEnabled) {
+      return;
+    }
+    if (!this.keyFormatPromise) {
+      const keyFormats = sessionKeys.reduce((formats, sessionKey) => {
+        if (formats.indexOf(sessionKey.keyFormat) === -1) {
+          formats.push(sessionKey.keyFormat);
+        }
+        return formats;
+      }, []);
+      this.log(`Selecting key-system from session-keys ${keyFormats.join(', ')}`);
+      this.keyFormatPromise = this.getKeyFormatPromise(keyFormats);
+    }
+  }
+  removeSession(mediaKeySessionContext) {
+    const {
+      mediaKeysSession,
+      licenseXhr,
+      decryptdata
+    } = mediaKeySessionContext;
+    if (mediaKeysSession) {
+      this.log(`Remove licenses and keys and close session "${mediaKeysSession.sessionId}" keyId: ${arrayToHex((decryptdata == null ? void 0 : decryptdata.keyId) || [])}`);
+      if (mediaKeySessionContext._onmessage) {
+        mediaKeysSession.removeEventListener('message', mediaKeySessionContext._onmessage);
+        mediaKeySessionContext._onmessage = undefined;
+      }
+      if (mediaKeySessionContext._onkeystatuseschange) {
+        mediaKeysSession.removeEventListener('keystatuseschange', mediaKeySessionContext._onkeystatuseschange);
+        mediaKeySessionContext._onkeystatuseschange = undefined;
+      }
+      if (licenseXhr && licenseXhr.readyState !== XMLHttpRequest.DONE) {
+        licenseXhr.abort();
+      }
+      mediaKeySessionContext.mediaKeysSession = mediaKeySessionContext.decryptdata = mediaKeySessionContext.licenseXhr = undefined;
+      const index = this.mediaKeySessions.indexOf(mediaKeySessionContext);
+      if (index > -1) {
+        this.mediaKeySessions.splice(index, 1);
+      }
+      const {
+        keyStatusTimeouts
+      } = mediaKeySessionContext;
+      if (keyStatusTimeouts) {
+        Object.keys(keyStatusTimeouts).forEach(keyId => self.clearTimeout(keyStatusTimeouts[keyId]));
+      }
+      const {
+        drmSystemOptions
+      } = this.config;
+      const removePromise = isPersistentSessionType(drmSystemOptions) ? new Promise((resolve, reject) => {
+        self.setTimeout(() => reject(new Error(`MediaKeySession.remove() timeout`)), 8000);
+        mediaKeysSession.remove().then(resolve).catch(reject);
+      }) : Promise.resolve();
+      return removePromise.catch(error => {
+        this.log(`Could not remove session: ${error}`);
+        if (!this.hls) return;
+        this.hls.trigger(Events.ERROR, {
+          type: ErrorTypes.OTHER_ERROR,
+          details: ErrorDetails.KEY_SYSTEM_DESTROY_REMOVE_SESSION_ERROR,
+          fatal: false,
+          error: new Error(`Could not remove session: ${error}`)
+        });
+      }).then(() => {
+        return mediaKeysSession.close();
+      }).catch(error => {
+        this.log(`Could not close session: ${error}`);
+        if (!this.hls) return;
+        this.hls.trigger(Events.ERROR, {
+          type: ErrorTypes.OTHER_ERROR,
+          details: ErrorDetails.KEY_SYSTEM_DESTROY_CLOSE_SESSION_ERROR,
+          fatal: false,
+          error: new Error(`Could not close session: ${error}`)
+        });
+      });
+    }
+    return Promise.resolve();
+  }
+}
+EMEController.CDMCleanupPromise = void 0;
+function getKeyIdString(decryptdata) {
+  if (!decryptdata) {
+    throw new Error('Could not read keyId of undefined decryptdata');
+  }
+  if (decryptdata.keyId === null) {
+    throw new Error('keyId is null');
+  }
+  return arrayToHex(decryptdata.keyId);
+}
+function getKeyStatus(decryptdata, keyContext) {
+  if (decryptdata.keyId && keyContext.mediaKeysSession.keyStatuses.has(decryptdata.keyId)) {
+    return keyContext.mediaKeysSession.keyStatuses.get(decryptdata.keyId);
+  }
+  if (decryptdata.matches(keyContext.decryptdata)) {
+    return keyContext.keyStatus;
+  }
+  return undefined;
+}
+class EMEKeyError extends Error {
+  constructor(data, message) {
+    super(message);
+    this.data = void 0;
+    data.error || (data.error = new Error(message));
+    this.data = data;
+    data.err = data.error;
+  }
+}
+function getKeyStatusError(keyStatus, decryptdata) {
+  const outputRestricted = keyStatus === 'output-restricted';
+  const details = outputRestricted ? ErrorDetails.KEY_SYSTEM_STATUS_OUTPUT_RESTRICTED : ErrorDetails.KEY_SYSTEM_STATUS_INTERNAL_ERROR;
+  return new EMEKeyError({
+    type: ErrorTypes.KEY_SYSTEM_ERROR,
+    details,
+    fatal: false,
+    decryptdata
+  }, outputRestricted ? 'HDCP level output restricted' : `key status changed to "${keyStatus}"`);
+}
+
+class FPSController {
+  constructor(hls) {
+    this.hls = void 0;
+    this.isVideoPlaybackQualityAvailable = false;
+    this.timer = void 0;
+    this.media = null;
+    this.lastTime = void 0;
+    this.lastDroppedFrames = 0;
+    this.lastDecodedFrames = 0;
+    // stream controller must be provided as a dependency!
+    this.streamController = void 0;
+    this.hls = hls;
+    this.registerListeners();
+  }
+  setStreamController(streamController) {
+    this.streamController = streamController;
+  }
+  registerListeners() {
+    this.hls.on(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    this.hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+  }
+  unregisterListeners() {
+    this.hls.off(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    this.hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+  }
+  destroy() {
+    if (this.timer) {
+      clearInterval(this.timer);
+    }
+    this.unregisterListeners();
+    this.isVideoPlaybackQualityAvailable = false;
+    this.media = null;
+  }
+  onMediaAttaching(event, data) {
+    const config = this.hls.config;
+    if (config.capLevelOnFPSDrop) {
+      const media = data.media instanceof self.HTMLVideoElement ? data.media : null;
+      this.media = media;
+      if (media && typeof media.getVideoPlaybackQuality === 'function') {
+        this.isVideoPlaybackQualityAvailable = true;
+      }
+      self.clearInterval(this.timer);
+      this.timer = self.setInterval(this.checkFPSInterval.bind(this), config.fpsDroppedMonitoringPeriod);
+    }
+  }
+  onMediaDetaching() {
+    this.media = null;
+  }
+  checkFPS(video, decodedFrames, droppedFrames) {
+    const currentTime = performance.now();
+    if (decodedFrames) {
+      if (this.lastTime) {
+        const currentPeriod = currentTime - this.lastTime;
+        const currentDropped = droppedFrames - this.lastDroppedFrames;
+        const currentDecoded = decodedFrames - this.lastDecodedFrames;
+        const droppedFPS = 1000 * currentDropped / currentPeriod;
+        const hls = this.hls;
+        hls.trigger(Events.FPS_DROP, {
+          currentDropped: currentDropped,
+          currentDecoded: currentDecoded,
+          totalDroppedFrames: droppedFrames
+        });
+        if (droppedFPS > 0) {
+          // hls.logger.log('checkFPS : droppedFPS/decodedFPS:' + droppedFPS/(1000 * currentDecoded / currentPeriod));
+          if (currentDropped > hls.config.fpsDroppedMonitoringThreshold * currentDecoded) {
+            let currentLevel = hls.currentLevel;
+            hls.logger.warn('drop FPS ratio greater than max allowed value for currentLevel: ' + currentLevel);
+            if (currentLevel > 0 && (hls.autoLevelCapping === -1 || hls.autoLevelCapping >= currentLevel)) {
+              currentLevel = currentLevel - 1;
+              hls.trigger(Events.FPS_DROP_LEVEL_CAPPING, {
+                level: currentLevel,
+                droppedLevel: hls.currentLevel
+              });
+              hls.autoLevelCapping = currentLevel;
+              this.streamController.nextLevelSwitch();
+            }
+          }
+        }
+      }
+      this.lastTime = currentTime;
+      this.lastDroppedFrames = droppedFrames;
+      this.lastDecodedFrames = decodedFrames;
+    }
+  }
+  checkFPSInterval() {
+    const video = this.media;
+    if (video) {
+      if (this.isVideoPlaybackQualityAvailable) {
+        const videoPlaybackQuality = video.getVideoPlaybackQuality();
+        this.checkFPS(video, videoPlaybackQuality.totalVideoFrames, videoPlaybackQuality.droppedVideoFrames);
+      } else {
+        // HTMLVideoElement doesn't include the webkit types
+        this.checkFPS(video, video.webkitDecodedFrameCount, video.webkitDroppedFrameCount);
+      }
+    }
+  }
+}
+
+function sendAddTrackEvent(track, videoEl) {
+  let event;
+  try {
+    event = new Event('addtrack');
+  } catch (err) {
+    // for IE11
+    event = document.createEvent('Event');
+    event.initEvent('addtrack', false, false);
+  }
+  event.track = track;
+  videoEl.dispatchEvent(event);
+}
+function addCueToTrack(track, cue) {
+  // Sometimes there are cue overlaps on segmented vtts so the same
+  // cue can appear more than once in different vtt files.
+  // This avoid showing duplicated cues with same timecode and text.
+  const mode = track.mode;
+  if (mode === 'disabled') {
+    track.mode = 'hidden';
+  }
+  if (track.cues && !track.cues.getCueById(cue.id)) {
+    try {
+      track.addCue(cue);
+      if (!track.cues.getCueById(cue.id)) {
+        throw new Error(`addCue is failed for: ${cue}`);
+      }
+    } catch (err) {
+      logger.debug(`[texttrack-utils]: ${err}`);
+      try {
+        const textTrackCue = new self.TextTrackCue(cue.startTime, cue.endTime, cue.text);
+        textTrackCue.id = cue.id;
+        track.addCue(textTrackCue);
+      } catch (err2) {
+        logger.debug(`[texttrack-utils]: Legacy TextTrackCue fallback failed: ${err2}`);
+      }
+    }
+  }
+  if (mode === 'disabled') {
+    track.mode = mode;
+  }
+}
+function clearCurrentCues(track, enterHandler) {
+  // When track.mode is disabled, track.cues will be null.
+  // To guarantee the removal of cues, we need to temporarily
+  // change the mode to hidden
+  const mode = track.mode;
+  if (mode === 'disabled') {
+    track.mode = 'hidden';
+  }
+  if (track.cues) {
+    for (let i = track.cues.length; i--;) {
+      if (enterHandler) {
+        track.cues[i].removeEventListener('enter', enterHandler);
+      }
+      track.removeCue(track.cues[i]);
+    }
+  }
+  if (mode === 'disabled') {
+    track.mode = mode;
+  }
+}
+function removeCuesInRange(track, start, end, predicate) {
+  const mode = track.mode;
+  if (mode === 'disabled') {
+    track.mode = 'hidden';
+  }
+  if (track.cues && track.cues.length > 0) {
+    const cues = getCuesInRange(track.cues, start, end);
+    for (let i = 0; i < cues.length; i++) {
+      if (!predicate || predicate(cues[i])) {
+        track.removeCue(cues[i]);
+      }
+    }
+  }
+  if (mode === 'disabled') {
+    track.mode = mode;
+  }
+}
+
+// Find first cue starting at or after given time.
+// Modified version of binary search O(log(n)).
+function getFirstCueIndexFromTime(cues, time) {
+  // If first cue starts at or after time, start there
+  if (time <= cues[0].startTime) {
+    return 0;
+  }
+  // If the last cue ends before time there is no overlap
+  const len = cues.length - 1;
+  if (time > cues[len].endTime) {
+    return -1;
+  }
+  let left = 0;
+  let right = len;
+  let mid;
+  while (left <= right) {
+    mid = Math.floor((right + left) / 2);
+    if (time < cues[mid].startTime) {
+      right = mid - 1;
+    } else if (time > cues[mid].startTime && left < len) {
+      left = mid + 1;
+    } else {
+      // If it's not lower or higher, it must be equal.
+      return mid;
+    }
+  }
+  // At this point, left and right have swapped.
+  // No direct match was found, left or right element must be the closest. Check which one has the smallest diff.
+  return cues[left].startTime - time < time - cues[right].startTime ? left : right;
+}
+function getCuesInRange(cues, start, end) {
+  const cuesFound = [];
+  const firstCueInRange = getFirstCueIndexFromTime(cues, start);
+  if (firstCueInRange > -1) {
+    for (let i = firstCueInRange, len = cues.length; i < len; i++) {
+      const cue = cues[i];
+      if (cue.startTime >= start && cue.endTime <= end) {
+        cuesFound.push(cue);
+      } else if (cue.startTime > end) {
+        return cuesFound;
+      }
+    }
+  }
+  return cuesFound;
+}
+function filterSubtitleTracks(textTrackList) {
+  const tracks = [];
+  for (let i = 0; i < textTrackList.length; i++) {
+    const track = textTrackList[i];
+    // Edge adds a track without a label; we don't want to use it
+    if ((track.kind === 'subtitles' || track.kind === 'captions') && track.label) {
+      tracks.push(textTrackList[i]);
+    }
+  }
+  return tracks;
+}
+
+class SubtitleTrackController extends BasePlaylistController {
+  constructor(hls) {
+    super(hls, 'subtitle-track-controller');
+    this.media = null;
+    this.tracks = [];
+    this.groupIds = null;
+    this.tracksInGroup = [];
+    this.trackId = -1;
+    this.currentTrack = null;
+    this.selectDefaultTrack = true;
+    this.queuedDefaultTrack = -1;
+    this.useTextTrackPolling = false;
+    this.subtitlePollingInterval = -1;
+    this._subtitleDisplay = true;
+    this.asyncPollTrackChange = () => this.pollTrackChange(0);
+    this.onTextTracksChanged = () => {
+      if (!this.useTextTrackPolling) {
+        self.clearInterval(this.subtitlePollingInterval);
+      }
+      // Media is undefined when switching streams via loadSource()
+      if (!this.media || !this.hls.config.renderTextTracksNatively) {
+        return;
+      }
+      let textTrack = null;
+      const tracks = filterSubtitleTracks(this.media.textTracks);
+      for (let i = 0; i < tracks.length; i++) {
+        if (tracks[i].mode === 'hidden') {
+          // Do not break in case there is a following track with showing.
+          textTrack = tracks[i];
+        } else if (tracks[i].mode === 'showing') {
+          textTrack = tracks[i];
+          break;
+        }
+      }
+
+      // Find internal track index for TextTrack
+      const trackId = this.findTrackForTextTrack(textTrack);
+      if (this.subtitleTrack !== trackId) {
+        this.setSubtitleTrack(trackId);
+      }
+    };
+    this.registerListeners();
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.tracks.length = 0;
+    this.tracksInGroup.length = 0;
+    this.currentTrack = null;
+    // @ts-ignore
+    this.onTextTracksChanged = this.asyncPollTrackChange = null;
+    super.destroy();
+  }
+  get subtitleDisplay() {
+    return this._subtitleDisplay;
+  }
+  set subtitleDisplay(value) {
+    this._subtitleDisplay = value;
+    if (this.trackId > -1) {
+      this.toggleTrackModes();
+    }
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.on(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.on(Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
+    hls.on(Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.off(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.off(Events.LEVEL_SWITCHING, this.onLevelSwitching, this);
+    hls.off(Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+
+  // Listen for subtitle track change, then extract the current track ID.
+  onMediaAttached(event, data) {
+    this.media = data.media;
+    if (!this.media) {
+      return;
+    }
+    if (this.queuedDefaultTrack > -1) {
+      this.subtitleTrack = this.queuedDefaultTrack;
+      this.queuedDefaultTrack = -1;
+    }
+    this.useTextTrackPolling = !(this.media.textTracks && 'onchange' in this.media.textTracks);
+    if (this.useTextTrackPolling) {
+      this.pollTrackChange(500);
+    } else {
+      this.media.textTracks.addEventListener('change', this.asyncPollTrackChange);
+    }
+  }
+  pollTrackChange(timeout) {
+    self.clearInterval(this.subtitlePollingInterval);
+    this.subtitlePollingInterval = self.setInterval(this.onTextTracksChanged, timeout);
+  }
+  onMediaDetaching(event, data) {
+    const media = this.media;
+    if (!media) {
+      return;
+    }
+    const transferringMedia = !!data.transferMedia;
+    self.clearInterval(this.subtitlePollingInterval);
+    if (!this.useTextTrackPolling) {
+      media.textTracks.removeEventListener('change', this.asyncPollTrackChange);
+    }
+    if (this.trackId > -1) {
+      this.queuedDefaultTrack = this.trackId;
+    }
+
+    // Disable all subtitle tracks before detachment so when reattached only tracks in that content are enabled.
+    this.subtitleTrack = -1;
+    this.media = null;
+    if (transferringMedia) {
+      return;
+    }
+    const textTracks = filterSubtitleTracks(media.textTracks);
+    // Clear loaded cues on media detachment from tracks
+    textTracks.forEach(track => {
+      clearCurrentCues(track);
+    });
+  }
+  onManifestLoading() {
+    this.tracks = [];
+    this.groupIds = null;
+    this.tracksInGroup = [];
+    this.trackId = -1;
+    this.currentTrack = null;
+    this.selectDefaultTrack = true;
+  }
+
+  // Fired whenever a new manifest is loaded.
+  onManifestParsed(event, data) {
+    this.tracks = data.subtitleTracks;
+  }
+  onSubtitleTrackLoaded(event, data) {
+    const {
+      id,
+      groupId,
+      details
+    } = data;
+    const trackInActiveGroup = this.tracksInGroup[id];
+    if (!trackInActiveGroup || trackInActiveGroup.groupId !== groupId) {
+      this.warn(`Subtitle track with id:${id} and group:${groupId} not found in active group ${trackInActiveGroup == null ? void 0 : trackInActiveGroup.groupId}`);
+      return;
+    }
+    const curDetails = trackInActiveGroup.details;
+    trackInActiveGroup.details = data.details;
+    this.log(`Subtitle track ${id} "${trackInActiveGroup.name}" lang:${trackInActiveGroup.lang} group:${groupId} loaded [${details.startSN}-${details.endSN}]`);
+    if (id === this.trackId) {
+      this.playlistLoaded(id, data, curDetails);
+    }
+  }
+  onLevelLoading(event, data) {
+    this.switchLevel(data.level);
+  }
+  onLevelSwitching(event, data) {
+    this.switchLevel(data.level);
+  }
+  switchLevel(levelIndex) {
+    const levelInfo = this.hls.levels[levelIndex];
+    if (!levelInfo) {
+      return;
+    }
+    const subtitleGroups = levelInfo.subtitleGroups || null;
+    const currentGroups = this.groupIds;
+    let currentTrack = this.currentTrack;
+    if (!subtitleGroups || (currentGroups == null ? void 0 : currentGroups.length) !== (subtitleGroups == null ? void 0 : subtitleGroups.length) || subtitleGroups != null && subtitleGroups.some(groupId => (currentGroups == null ? void 0 : currentGroups.indexOf(groupId)) === -1)) {
+      this.groupIds = subtitleGroups;
+      this.trackId = -1;
+      this.currentTrack = null;
+      const subtitleTracks = this.tracks.filter(track => !subtitleGroups || subtitleGroups.indexOf(track.groupId) !== -1);
+      if (subtitleTracks.length) {
+        // Disable selectDefaultTrack if there are no default tracks
+        if (this.selectDefaultTrack && !subtitleTracks.some(track => track.default)) {
+          this.selectDefaultTrack = false;
+        }
+        // track.id should match hls.audioTracks index
+        subtitleTracks.forEach((track, i) => {
+          track.id = i;
+        });
+      } else if (!currentTrack && !this.tracksInGroup.length) {
+        // Do not dispatch SUBTITLE_TRACKS_UPDATED when there were and are no tracks
+        return;
+      }
+      this.tracksInGroup = subtitleTracks;
+
+      // Find preferred track
+      const subtitlePreference = this.hls.config.subtitlePreference;
+      if (!currentTrack && subtitlePreference) {
+        this.selectDefaultTrack = false;
+        const groupIndex = findMatchingOption(subtitlePreference, subtitleTracks);
+        if (groupIndex > -1) {
+          currentTrack = subtitleTracks[groupIndex];
+        } else {
+          const allIndex = findMatchingOption(subtitlePreference, this.tracks);
+          currentTrack = this.tracks[allIndex];
+        }
+      }
+
+      // Select initial track
+      let trackId = this.findTrackId(currentTrack);
+      if (trackId === -1 && currentTrack) {
+        trackId = this.findTrackId(null);
+      }
+
+      // Dispatch events and load track if needed
+      const subtitleTracksUpdated = {
+        subtitleTracks
+      };
+      this.log(`Updating subtitle tracks, ${subtitleTracks.length} track(s) found in "${subtitleGroups == null ? void 0 : subtitleGroups.join(',')}" group-id`);
+      this.hls.trigger(Events.SUBTITLE_TRACKS_UPDATED, subtitleTracksUpdated);
+      if (trackId !== -1 && this.trackId === -1) {
+        this.setSubtitleTrack(trackId);
+      }
+    }
+  }
+  findTrackId(currentTrack) {
+    const tracks = this.tracksInGroup;
+    const selectDefault = this.selectDefaultTrack;
+    for (let i = 0; i < tracks.length; i++) {
+      const track = tracks[i];
+      if (selectDefault && !track.default || !selectDefault && !currentTrack) {
+        continue;
+      }
+      if (!currentTrack || matchesOption(track, currentTrack)) {
+        return i;
+      }
+    }
+    if (currentTrack) {
+      for (let i = 0; i < tracks.length; i++) {
+        const track = tracks[i];
+        if (mediaAttributesIdentical(currentTrack.attrs, track.attrs, ['LANGUAGE', 'ASSOC-LANGUAGE', 'CHARACTERISTICS'])) {
+          return i;
+        }
+      }
+      for (let i = 0; i < tracks.length; i++) {
+        const track = tracks[i];
+        if (mediaAttributesIdentical(currentTrack.attrs, track.attrs, ['LANGUAGE'])) {
+          return i;
+        }
+      }
+    }
+    return -1;
+  }
+  findTrackForTextTrack(textTrack) {
+    if (textTrack) {
+      const tracks = this.tracksInGroup;
+      for (let i = 0; i < tracks.length; i++) {
+        const track = tracks[i];
+        if (subtitleTrackMatchesTextTrack(track, textTrack)) {
+          return i;
+        }
+      }
+    }
+    return -1;
+  }
+  onError(event, data) {
+    if (data.fatal || !data.context) {
+      return;
+    }
+    if (data.context.type === PlaylistContextType.SUBTITLE_TRACK && data.context.id === this.trackId && (!this.groupIds || this.groupIds.indexOf(data.context.groupId) !== -1)) {
+      this.checkRetry(data);
+    }
+  }
+  get allSubtitleTracks() {
+    return this.tracks;
+  }
+
+  /** get alternate subtitle tracks list from playlist **/
+  get subtitleTracks() {
+    return this.tracksInGroup;
+  }
+
+  /** get/set index of the selected subtitle track (based on index in subtitle track lists) **/
+  get subtitleTrack() {
+    return this.trackId;
+  }
+  set subtitleTrack(newId) {
+    this.selectDefaultTrack = false;
+    this.setSubtitleTrack(newId);
+  }
+  setSubtitleOption(subtitleOption) {
+    this.hls.config.subtitlePreference = subtitleOption;
+    if (subtitleOption) {
+      if (subtitleOption.id === -1) {
+        this.setSubtitleTrack(-1);
+        return null;
+      }
+      const allSubtitleTracks = this.allSubtitleTracks;
+      this.selectDefaultTrack = false;
+      if (allSubtitleTracks.length) {
+        // First see if current option matches (no switch op)
+        const currentTrack = this.currentTrack;
+        if (currentTrack && matchesOption(subtitleOption, currentTrack)) {
+          return currentTrack;
+        }
+        // Find option in current group
+        const groupIndex = findMatchingOption(subtitleOption, this.tracksInGroup);
+        if (groupIndex > -1) {
+          const track = this.tracksInGroup[groupIndex];
+          this.setSubtitleTrack(groupIndex);
+          return track;
+        } else if (currentTrack) {
+          // If this is not the initial selection return null
+          // option should have matched one in active group
+          return null;
+        } else {
+          // Find the option in all tracks for initial selection
+          const allIndex = findMatchingOption(subtitleOption, allSubtitleTracks);
+          if (allIndex > -1) {
+            return allSubtitleTracks[allIndex];
+          }
+        }
+      }
+    }
+    return null;
+  }
+  loadPlaylist(hlsUrlParameters) {
+    super.loadPlaylist();
+    if (this.shouldLoadPlaylist(this.currentTrack)) {
+      this.scheduleLoading(this.currentTrack, hlsUrlParameters);
+    }
+  }
+  loadingPlaylist(currentTrack, hlsUrlParameters) {
+    super.loadingPlaylist(currentTrack, hlsUrlParameters);
+    const id = currentTrack.id;
+    const groupId = currentTrack.groupId;
+    const url = this.getUrlWithDirectives(currentTrack.url, hlsUrlParameters);
+    const details = currentTrack.details;
+    const age = details == null ? void 0 : details.age;
+    this.log(`Loading subtitle ${id} "${currentTrack.name}" lang:${currentTrack.lang} group:${groupId}${(hlsUrlParameters == null ? void 0 : hlsUrlParameters.msn) !== undefined ? ' at sn ' + hlsUrlParameters.msn + ' part ' + hlsUrlParameters.part : ''}${age && details.live ? ' age ' + age.toFixed(1) + (details.type ? ' ' + details.type || '' : '') : ''} ${url}`);
+    this.hls.trigger(Events.SUBTITLE_TRACK_LOADING, {
+      url,
+      id,
+      groupId,
+      deliveryDirectives: hlsUrlParameters || null,
+      track: currentTrack
+    });
+  }
+
+  /**
+   * Disables the old subtitleTrack and sets current mode on the next subtitleTrack.
+   * This operates on the DOM textTracks.
+   * A value of -1 will disable all subtitle tracks.
+   */
+  toggleTrackModes() {
+    const {
+      media
+    } = this;
+    if (!media) {
+      return;
+    }
+    const textTracks = filterSubtitleTracks(media.textTracks);
+    const currentTrack = this.currentTrack;
+    let nextTrack;
+    if (currentTrack) {
+      nextTrack = textTracks.filter(textTrack => subtitleTrackMatchesTextTrack(currentTrack, textTrack))[0];
+      if (!nextTrack) {
+        this.warn(`Unable to find subtitle TextTrack with name "${currentTrack.name}" and language "${currentTrack.lang}"`);
+      }
+    }
+    [].slice.call(textTracks).forEach(track => {
+      if (track.mode !== 'disabled' && track !== nextTrack) {
+        track.mode = 'disabled';
+      }
+    });
+    if (nextTrack) {
+      const mode = this.subtitleDisplay ? 'showing' : 'hidden';
+      if (nextTrack.mode !== mode) {
+        nextTrack.mode = mode;
+      }
+    }
+  }
+
+  /**
+   * This method is responsible for validating the subtitle index and periodically reloading if live.
+   * Dispatches the SUBTITLE_TRACK_SWITCH event, which instructs the subtitle-stream-controller to load the selected track.
+   */
+  setSubtitleTrack(newId) {
+    const tracks = this.tracksInGroup;
+
+    // setting this.subtitleTrack will trigger internal logic
+    // if media has not been attached yet, it will fail
+    // we keep a reference to the default track id
+    // and we'll set subtitleTrack when onMediaAttached is triggered
+    if (!this.media) {
+      this.queuedDefaultTrack = newId;
+      return;
+    }
+
+    // exit if track id as already set or invalid
+    if (newId < -1 || newId >= tracks.length || !isFiniteNumber(newId)) {
+      this.warn(`Invalid subtitle track id: ${newId}`);
+      return;
+    }
+    this.selectDefaultTrack = false;
+    const lastTrack = this.currentTrack;
+    const track = tracks[newId] || null;
+    this.trackId = newId;
+    this.currentTrack = track;
+    this.toggleTrackModes();
+    if (!track) {
+      // switch to -1
+      this.hls.trigger(Events.SUBTITLE_TRACK_SWITCH, {
+        id: newId
+      });
+      return;
+    }
+    const trackLoaded = !!track.details && !track.details.live;
+    if (newId === this.trackId && track === lastTrack && trackLoaded) {
+      return;
+    }
+    this.log(`Switching to subtitle-track ${newId}` + (track ? ` "${track.name}" lang:${track.lang} group:${track.groupId}` : ''));
+    const {
+      id,
+      groupId = '',
+      name,
+      type,
+      url
+    } = track;
+    this.hls.trigger(Events.SUBTITLE_TRACK_SWITCH, {
+      id,
+      groupId,
+      name,
+      type,
+      url
+    });
+    const hlsUrlParameters = this.switchParams(track.url, lastTrack == null ? void 0 : lastTrack.details, track.details);
+    this.loadPlaylist(hlsUrlParameters);
+  }
+}
+
+/**
+ * Generate a random v4 UUID
+ *
+ * @returns A random v4 UUID
+ *
+ * @group Utils
+ *
+ * @beta
+ */
+function uuid() {
+  try {
+    return crypto.randomUUID();
+  } catch (error) {
+    try {
+      const url = URL.createObjectURL(new Blob());
+      const uuid = url.toString();
+      URL.revokeObjectURL(url);
+      return uuid.slice(uuid.lastIndexOf('/') + 1);
+    } catch (error) {
+      let dt = new Date().getTime();
+      const uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
+        const r = (dt + Math.random() * 16) % 16 | 0;
+        dt = Math.floor(dt / 16);
+        return (c == 'x' ? r : r & 0x3 | 0x8).toString(16);
+      });
+      return uuid;
+    }
+  }
+}
+
+// From https://github.com/darkskyapp/string-hash
+function hash(text) {
+  let hash = 5381;
+  let i = text.length;
+  while (i) {
+    hash = hash * 33 ^ text.charCodeAt(--i);
+  }
+  return (hash >>> 0).toString();
+}
+
+const ALIGNED_END_THRESHOLD_SECONDS = 0.025;
+let TimelineOccupancy = /*#__PURE__*/function (TimelineOccupancy) {
+  TimelineOccupancy[TimelineOccupancy["Point"] = 0] = "Point";
+  TimelineOccupancy[TimelineOccupancy["Range"] = 1] = "Range";
+  return TimelineOccupancy;
+}({});
+function generateAssetIdentifier(interstitial, uri, assetListIndex) {
+  return `${interstitial.identifier}-${assetListIndex + 1}-${hash(uri)}`;
+}
+class InterstitialEvent {
+  constructor(dateRange, base) {
+    this.base = void 0;
+    this._duration = null;
+    this._timelineStart = null;
+    this.appendInPlaceDisabled = void 0;
+    this.appendInPlaceStarted = void 0;
+    this.dateRange = void 0;
+    this.hasPlayed = false;
+    this.cumulativeDuration = 0;
+    this.resumeOffset = NaN;
+    this.playoutLimit = NaN;
+    this.restrictions = {
+      skip: false,
+      jump: false
+    };
+    this.snapOptions = {
+      out: false,
+      in: false
+    };
+    this.assetList = [];
+    this.assetListLoader = void 0;
+    this.assetListResponse = null;
+    this.resumeAnchor = void 0;
+    this.error = void 0;
+    this.resetOnResume = void 0;
+    this.base = base;
+    this.dateRange = dateRange;
+    this.setDateRange(dateRange);
+  }
+  setDateRange(dateRange) {
+    this.dateRange = dateRange;
+    this.resumeOffset = dateRange.attr.optionalFloat('X-RESUME-OFFSET', this.resumeOffset);
+    this.playoutLimit = dateRange.attr.optionalFloat('X-PLAYOUT-LIMIT', this.playoutLimit);
+    this.restrictions = dateRange.attr.enumeratedStringList('X-RESTRICT', this.restrictions);
+    this.snapOptions = dateRange.attr.enumeratedStringList('X-SNAP', this.snapOptions);
+  }
+  reset() {
+    var _this$assetListLoader;
+    this.appendInPlaceStarted = false;
+    (_this$assetListLoader = this.assetListLoader) == null || _this$assetListLoader.destroy();
+    this.assetListLoader = undefined;
+    if (!this.supplementsPrimary) {
+      this.assetListResponse = null;
+      this.assetList = [];
+      this._duration = null;
+    }
+    // `error?` is reset when seeking back over interstitial `startOffset`
+    //  using `schedule.resetErrorsInRange(start, end)`.
+  }
+  isAssetPastPlayoutLimit(assetIndex) {
+    var _this$assetList$asset;
+    if (assetIndex > 0 && assetIndex >= this.assetList.length) {
+      return true;
+    }
+    const playoutLimit = this.playoutLimit;
+    if (assetIndex <= 0 || isNaN(playoutLimit)) {
+      return false;
+    }
+    if (playoutLimit === 0) {
+      return true;
+    }
+    const assetOffset = ((_this$assetList$asset = this.assetList[assetIndex]) == null ? void 0 : _this$assetList$asset.startOffset) || 0;
+    return assetOffset > playoutLimit;
+  }
+  findAssetIndex(asset) {
+    const index = this.assetList.indexOf(asset);
+    return index;
+  }
+  get identifier() {
+    return this.dateRange.id;
+  }
+  get startDate() {
+    return this.dateRange.startDate;
+  }
+  get startTime() {
+    // Primary media timeline start time
+    const startTime = this.dateRange.startTime;
+    if (this.snapOptions.out) {
+      const frag = this.dateRange.tagAnchor;
+      if (frag) {
+        return getSnapToFragmentTime(startTime, frag);
+      }
+    }
+    return startTime;
+  }
+  get startOffset() {
+    return this.cue.pre ? 0 : this.startTime;
+  }
+  get startIsAligned() {
+    if (this.startTime === 0 || this.snapOptions.out) {
+      return true;
+    }
+    const frag = this.dateRange.tagAnchor;
+    if (frag) {
+      const startTime = this.dateRange.startTime;
+      const snappedStart = getSnapToFragmentTime(startTime, frag);
+      return startTime - snappedStart < 0.1;
+    }
+    return false;
+  }
+  get resumptionOffset() {
+    const resumeOffset = this.resumeOffset;
+    const offset = isFiniteNumber(resumeOffset) ? resumeOffset : this.duration;
+    return this.cumulativeDuration + offset;
+  }
+  get resumeTime() {
+    // Primary media timeline resumption time
+    const resumeTime = this.startOffset + this.resumptionOffset;
+    if (this.snapOptions.in) {
+      const frag = this.resumeAnchor;
+      if (frag) {
+        return getSnapToFragmentTime(resumeTime, frag);
+      }
+    }
+    return resumeTime;
+  }
+  get appendInPlace() {
+    if (this.appendInPlaceStarted) {
+      return true;
+    }
+    if (this.appendInPlaceDisabled) {
+      return false;
+    }
+    if (!this.cue.once && !this.cue.pre &&
+    // preroll starts at startPosition before startPosition is known (live)
+    this.startIsAligned && (isNaN(this.playoutLimit) && isNaN(this.resumeOffset) || this.resumeOffset && this.duration && Math.abs(this.resumeOffset - this.duration) < ALIGNED_END_THRESHOLD_SECONDS)) {
+      return true;
+    }
+    return false;
+  }
+  set appendInPlace(value) {
+    if (this.appendInPlaceStarted) {
+      this.resetOnResume = !value;
+      return;
+    }
+    this.appendInPlaceDisabled = !value;
+  }
+
+  // Extended timeline start time
+  get timelineStart() {
+    if (this._timelineStart !== null) {
+      return this._timelineStart;
+    }
+    return this.startTime;
+  }
+  set timelineStart(value) {
+    this._timelineStart = value;
+  }
+  get duration() {
+    const playoutLimit = this.playoutLimit;
+    let duration;
+    if (this._duration !== null) {
+      duration = this._duration;
+    } else if (this.dateRange.duration) {
+      duration = this.dateRange.duration;
+    } else {
+      duration = this.dateRange.plannedDuration || 0;
+    }
+    if (!isNaN(playoutLimit) && playoutLimit < duration) {
+      duration = playoutLimit;
+    }
+    return duration;
+  }
+  set duration(value) {
+    this._duration = value;
+  }
+  get cue() {
+    return this.dateRange.cue;
+  }
+  get timelineOccupancy() {
+    if (this.dateRange.attr['X-TIMELINE-OCCUPIES'] === 'RANGE') {
+      return TimelineOccupancy.Range;
+    }
+    return TimelineOccupancy.Point;
+  }
+  get supplementsPrimary() {
+    return this.dateRange.attr['X-TIMELINE-STYLE'] === 'PRIMARY';
+  }
+  get contentMayVary() {
+    return this.dateRange.attr['X-CONTENT-MAY-VARY'] !== 'NO';
+  }
+  get assetUrl() {
+    return this.dateRange.attr['X-ASSET-URI'];
+  }
+  get assetListUrl() {
+    return this.dateRange.attr['X-ASSET-LIST'];
+  }
+  get baseUrl() {
+    return this.base.url;
+  }
+  get assetListLoaded() {
+    return this.assetList.length > 0 || this.assetListResponse !== null;
+  }
+  toString() {
+    return eventToString(this);
+  }
+}
+function getSnapToFragmentTime(time, frag) {
+  return time - frag.start < frag.duration / 2 && !(Math.abs(time - (frag.start + frag.duration)) < ALIGNED_END_THRESHOLD_SECONDS) ? frag.start : frag.start + frag.duration;
+}
+function getInterstitialUrl(uri, sessionId, baseUrl) {
+  const url = new self.URL(uri, baseUrl);
+  if (url.protocol !== 'data:') {
+    url.searchParams.set('_HLS_primary_id', sessionId);
+  }
+  return url;
+}
+function getNextAssetIndex(interstitial, assetListIndex) {
+  while ((_interstitial$assetLi = interstitial.assetList[++assetListIndex]) != null && _interstitial$assetLi.error) {
+    var _interstitial$assetLi;
+  } /* no-op */
+  return assetListIndex;
+}
+function eventToString(interstitial) {
+  return `["${interstitial.identifier}" ${interstitial.cue.pre ? '<pre>' : interstitial.cue.post ? '<post>' : ''}${interstitial.timelineStart.toFixed(2)}-${interstitial.resumeTime.toFixed(2)}]`;
+}
+function eventAssetToString(asset) {
+  const start = asset.timelineStart;
+  const duration = asset.duration || 0;
+  return `["${asset.identifier}" ${start.toFixed(2)}-${(start + duration).toFixed(2)}]`;
+}
+
+class HlsAssetPlayer {
+  constructor(HlsPlayerClass, userConfig, interstitial, assetItem) {
+    this.hls = void 0;
+    this.interstitial = void 0;
+    this.assetItem = void 0;
+    this.tracks = null;
+    this.hasDetails = false;
+    this.mediaAttached = null;
+    this._currentTime = void 0;
+    this._bufferedEosTime = void 0;
+    this.checkPlayout = () => {
+      if (this.reachedPlayout(this.currentTime) && this.hls) {
+        this.hls.trigger(Events.PLAYOUT_LIMIT_REACHED, {});
+      }
+    };
+    const hls = this.hls = new HlsPlayerClass(userConfig);
+    this.interstitial = interstitial;
+    this.assetItem = assetItem;
+    const detailsLoaded = () => {
+      this.hasDetails = true;
+    };
+    hls.once(Events.LEVEL_LOADED, detailsLoaded);
+    hls.once(Events.AUDIO_TRACK_LOADED, detailsLoaded);
+    hls.once(Events.SUBTITLE_TRACK_LOADED, detailsLoaded);
+    hls.on(Events.MEDIA_ATTACHING, (name, {
+      media
+    }) => {
+      this.removeMediaListeners();
+      this.mediaAttached = media;
+      const event = this.interstitial;
+      if (event.playoutLimit) {
+        media.addEventListener('timeupdate', this.checkPlayout);
+        if (this.appendInPlace) {
+          hls.on(Events.BUFFER_APPENDED, () => {
+            const bufferedEnd = this.bufferedEnd;
+            if (this.reachedPlayout(bufferedEnd)) {
+              this._bufferedEosTime = bufferedEnd;
+              hls.trigger(Events.BUFFERED_TO_END, undefined);
+            }
+          });
+        }
+      }
+    });
+  }
+  get appendInPlace() {
+    return this.interstitial.appendInPlace;
+  }
+  loadSource() {
+    const hls = this.hls;
+    if (!hls) {
+      return;
+    }
+    if (!hls.url) {
+      let uri = this.assetItem.uri;
+      try {
+        uri = getInterstitialUrl(uri, hls.config.primarySessionId || '').href;
+      } catch (error) {
+        // Ignore error parsing ASSET_URI or adding _HLS_primary_id to it. The
+        // issue should surface as an INTERSTITIAL_ASSET_ERROR loading the asset.
+      }
+      hls.loadSource(uri);
+    } else if (hls.levels.length && !hls.started) {
+      hls.startLoad(-1, true);
+    }
+  }
+  bufferedInPlaceToEnd(media) {
+    var _this$hls;
+    if (!this.appendInPlace) {
+      return false;
+    }
+    if ((_this$hls = this.hls) != null && _this$hls.bufferedToEnd) {
+      return true;
+    }
+    if (!media) {
+      return false;
+    }
+    const duration = Math.min(this._bufferedEosTime || Infinity, this.duration);
+    const start = this.timelineOffset;
+    const bufferInfo = BufferHelper.bufferInfo(media, start, 0);
+    const bufferedEnd = this.getAssetTime(bufferInfo.end);
+    return bufferedEnd >= duration - 0.02;
+  }
+  reachedPlayout(time) {
+    const interstitial = this.interstitial;
+    const playoutLimit = interstitial.playoutLimit;
+    return this.startOffset + time >= playoutLimit;
+  }
+  get destroyed() {
+    var _this$hls2;
+    return !((_this$hls2 = this.hls) != null && _this$hls2.userConfig);
+  }
+  get assetId() {
+    return this.assetItem.identifier;
+  }
+  get interstitialId() {
+    return this.assetItem.parentIdentifier;
+  }
+  get media() {
+    var _this$hls3;
+    return ((_this$hls3 = this.hls) == null ? void 0 : _this$hls3.media) || null;
+  }
+  get bufferedEnd() {
+    const media = this.media || this.mediaAttached;
+    if (!media) {
+      if (this._bufferedEosTime) {
+        return this._bufferedEosTime;
+      }
+      return this.currentTime;
+    }
+    const bufferInfo = BufferHelper.bufferInfo(media, media.currentTime, 0.001);
+    return this.getAssetTime(bufferInfo.end);
+  }
+  get currentTime() {
+    const media = this.media || this.mediaAttached;
+    if (!media) {
+      return this._currentTime || 0;
+    }
+    return this.getAssetTime(media.currentTime);
+  }
+  get duration() {
+    const duration = this.assetItem.duration;
+    if (!duration) {
+      return 0;
+    }
+    const playoutLimit = this.interstitial.playoutLimit;
+    if (playoutLimit) {
+      const assetPlayout = playoutLimit - this.startOffset;
+      if (assetPlayout > 0 && assetPlayout < duration) {
+        return assetPlayout;
+      }
+    }
+    return duration;
+  }
+  get remaining() {
+    const duration = this.duration;
+    if (!duration) {
+      return 0;
+    }
+    return Math.max(0, duration - this.currentTime);
+  }
+  get startOffset() {
+    return this.assetItem.startOffset;
+  }
+  get timelineOffset() {
+    var _this$hls4;
+    return ((_this$hls4 = this.hls) == null ? void 0 : _this$hls4.config.timelineOffset) || 0;
+  }
+  set timelineOffset(value) {
+    const timelineOffset = this.timelineOffset;
+    if (value !== timelineOffset) {
+      const diff = value - timelineOffset;
+      if (Math.abs(diff) > 1 / 90000 && this.hls) {
+        if (this.hasDetails) {
+          throw new Error(`Cannot set timelineOffset after playlists are loaded`);
+        }
+        this.hls.config.timelineOffset = value;
+      }
+    }
+  }
+  getAssetTime(time) {
+    const timelineOffset = this.timelineOffset;
+    const duration = this.duration;
+    return Math.min(Math.max(0, time - timelineOffset), duration);
+  }
+  removeMediaListeners() {
+    const media = this.mediaAttached;
+    if (media) {
+      this._currentTime = media.currentTime;
+      this.bufferSnapShot();
+      media.removeEventListener('timeupdate', this.checkPlayout);
+    }
+  }
+  bufferSnapShot() {
+    if (this.mediaAttached) {
+      var _this$hls5;
+      if ((_this$hls5 = this.hls) != null && _this$hls5.bufferedToEnd) {
+        this._bufferedEosTime = this.bufferedEnd;
+      }
+    }
+  }
+  destroy() {
+    this.removeMediaListeners();
+    if (this.hls) {
+      this.hls.destroy();
+    }
+    this.hls = null;
+    // @ts-ignore
+    this.tracks = this.mediaAttached = this.checkPlayout = null;
+  }
+  attachMedia(data) {
+    var _this$hls6;
+    this.loadSource();
+    (_this$hls6 = this.hls) == null || _this$hls6.attachMedia(data);
+  }
+  detachMedia() {
+    var _this$hls7;
+    this.removeMediaListeners();
+    this.mediaAttached = null;
+    (_this$hls7 = this.hls) == null || _this$hls7.detachMedia();
+  }
+  resumeBuffering() {
+    var _this$hls8;
+    (_this$hls8 = this.hls) == null || _this$hls8.resumeBuffering();
+  }
+  pauseBuffering() {
+    var _this$hls9;
+    (_this$hls9 = this.hls) == null || _this$hls9.pauseBuffering();
+  }
+  transferMedia() {
+    var _this$hls0;
+    this.bufferSnapShot();
+    return ((_this$hls0 = this.hls) == null ? void 0 : _this$hls0.transferMedia()) || null;
+  }
+  resetDetails() {
+    const hls = this.hls;
+    if (hls && this.hasDetails) {
+      hls.stopLoad();
+      const deleteDetails = obj => delete obj.details;
+      hls.levels.forEach(deleteDetails);
+      hls.allAudioTracks.forEach(deleteDetails);
+      hls.allSubtitleTracks.forEach(deleteDetails);
+      this.hasDetails = false;
+    }
+  }
+  on(event, listener, context) {
+    var _this$hls1;
+    (_this$hls1 = this.hls) == null || _this$hls1.on(event, listener);
+  }
+  once(event, listener, context) {
+    var _this$hls10;
+    (_this$hls10 = this.hls) == null || _this$hls10.once(event, listener);
+  }
+  off(event, listener, context) {
+    var _this$hls11;
+    (_this$hls11 = this.hls) == null || _this$hls11.off(event, listener);
+  }
+  toString() {
+    var _this$hls12;
+    return `HlsAssetPlayer: ${eventAssetToString(this.assetItem)} ${(_this$hls12 = this.hls) == null ? void 0 : _this$hls12.sessionId} ${this.appendInPlace ? 'append-in-place' : ''}`;
+  }
+}
+
+const ABUTTING_THRESHOLD_SECONDS = 0.033;
+class InterstitialsSchedule extends Logger {
+  constructor(onScheduleUpdate, logger) {
+    super('interstitials-sched', logger);
+    this.onScheduleUpdate = void 0;
+    this.eventMap = {};
+    this.events = null;
+    this.items = null;
+    this.durations = {
+      primary: 0,
+      playout: 0,
+      integrated: 0
+    };
+    this.onScheduleUpdate = onScheduleUpdate;
+  }
+  destroy() {
+    this.reset();
+    // @ts-ignore
+    this.onScheduleUpdate = null;
+  }
+  reset() {
+    this.eventMap = {};
+    this.setDurations(0, 0, 0);
+    if (this.events) {
+      this.events.forEach(interstitial => interstitial.reset());
+    }
+    this.events = this.items = null;
+  }
+  resetErrorsInRange(start, end) {
+    if (this.events) {
+      return this.events.reduce((count, interstitial) => {
+        if (start <= interstitial.startOffset && end > interstitial.startOffset) {
+          delete interstitial.error;
+          return count + 1;
+        }
+        return count;
+      }, 0);
+    }
+    return 0;
+  }
+  get duration() {
+    const items = this.items;
+    return items ? items[items.length - 1].end : 0;
+  }
+  get length() {
+    return this.items ? this.items.length : 0;
+  }
+  getEvent(identifier) {
+    return identifier ? this.eventMap[identifier] || null : null;
+  }
+  hasEvent(identifier) {
+    return identifier in this.eventMap;
+  }
+  findItemIndex(item, time) {
+    if (item.event) {
+      // Find Event Item
+      return this.findEventIndex(item.event.identifier);
+    }
+    // Find Primary Item
+    let index = -1;
+    if (item.nextEvent) {
+      index = this.findEventIndex(item.nextEvent.identifier) - 1;
+    } else if (item.previousEvent) {
+      index = this.findEventIndex(item.previousEvent.identifier) + 1;
+    }
+    const items = this.items;
+    if (items) {
+      if (!items[index]) {
+        if (time === undefined) {
+          time = item.start;
+        }
+        index = this.findItemIndexAtTime(time);
+      }
+      // Only return index of a Primary Item
+      while (index >= 0 && (_items$index = items[index]) != null && _items$index.event) {
+        var _items$index;
+        // If index found is an interstitial it is not a valid result as it should have been matched up top
+        // decrement until result is negative (not found) or a primary segment
+        index--;
+      }
+    }
+    return index;
+  }
+  findItemIndexAtTime(timelinePos, timelineType) {
+    const items = this.items;
+    if (items) {
+      for (let i = 0; i < items.length; i++) {
+        let timeRange = items[i];
+        if (timelineType && timelineType !== 'primary') {
+          timeRange = timeRange[timelineType];
+        }
+        if (timelinePos === timeRange.start || timelinePos > timeRange.start && timelinePos < timeRange.end) {
+          return i;
+        }
+      }
+    }
+    return -1;
+  }
+  findJumpRestrictedIndex(startIndex, endIndex) {
+    const items = this.items;
+    if (items) {
+      for (let i = startIndex; i <= endIndex; i++) {
+        if (!items[i]) {
+          break;
+        }
+        const event = items[i].event;
+        if (event != null && event.restrictions.jump && !event.appendInPlace) {
+          return i;
+        }
+      }
+    }
+    return -1;
+  }
+  findEventIndex(identifier) {
+    const items = this.items;
+    if (items) {
+      for (let i = items.length; i--;) {
+        var _items$i$event;
+        if (((_items$i$event = items[i].event) == null ? void 0 : _items$i$event.identifier) === identifier) {
+          return i;
+        }
+      }
+    }
+    return -1;
+  }
+  findAssetIndex(event, timelinePos) {
+    const assetList = event.assetList;
+    const length = assetList.length;
+    if (length > 1) {
+      for (let i = 0; i < length; i++) {
+        const asset = assetList[i];
+        if (!asset.error) {
+          const timelineStart = asset.timelineStart;
+          if (timelinePos === timelineStart || timelinePos > timelineStart && (timelinePos < timelineStart + (asset.duration || 0) || i === length - 1)) {
+            return i;
+          }
+        }
+      }
+    }
+    return 0;
+  }
+  get assetIdAtEnd() {
+    var _this$items;
+    const interstitialAtEnd = (_this$items = this.items) == null || (_this$items = _this$items[this.length - 1]) == null ? void 0 : _this$items.event;
+    if (interstitialAtEnd) {
+      const assetList = interstitialAtEnd.assetList;
+      const assetAtEnd = assetList[assetList.length - 1];
+      if (assetAtEnd) {
+        return assetAtEnd.identifier;
+      }
+    }
+    return null;
+  }
+  parseInterstitialDateRanges(mediaSelection, enableAppendInPlace) {
+    const details = mediaSelection.main.details;
+    const {
+      dateRanges
+    } = details;
+    const previousInterstitialEvents = this.events;
+    const interstitialEvents = this.parseDateRanges(dateRanges, {
+      url: details.url
+    }, enableAppendInPlace);
+    const ids = Object.keys(dateRanges);
+    const removedInterstitials = previousInterstitialEvents ? previousInterstitialEvents.filter(event => !ids.includes(event.identifier)) : [];
+    if (interstitialEvents.length) {
+      // pre-rolls, post-rolls, and events with the same start time are played in playlist tag order
+      // all other events are ordered by start time
+      interstitialEvents.sort((a, b) => {
+        const aPre = a.cue.pre;
+        const aPost = a.cue.post;
+        const bPre = b.cue.pre;
+        const bPost = b.cue.post;
+        if (aPre && !bPre) {
+          return -1;
+        }
+        if (bPre && !aPre) {
+          return 1;
+        }
+        if (aPost && !bPost) {
+          return 1;
+        }
+        if (bPost && !aPost) {
+          return -1;
+        }
+        if (!aPre && !bPre && !aPost && !bPost) {
+          const startA = a.startTime;
+          const startB = b.startTime;
+          if (startA !== startB) {
+            return startA - startB;
+          }
+        }
+        return a.dateRange.tagOrder - b.dateRange.tagOrder;
+      });
+    }
+    this.events = interstitialEvents;
+
+    // Clear removed DateRanges from buffered list (kills playback of active Interstitials)
+    removedInterstitials.forEach(interstitial => {
+      this.removeEvent(interstitial);
+    });
+    this.updateSchedule(mediaSelection, removedInterstitials);
+  }
+  updateSchedule(mediaSelection, removedInterstitials = [], forceUpdate = false) {
+    const events = this.events || [];
+    if (events.length || removedInterstitials.length || this.length < 2) {
+      const currentItems = this.items;
+      const updatedItems = this.parseSchedule(events, mediaSelection);
+      const updated = forceUpdate || removedInterstitials.length || (currentItems == null ? void 0 : currentItems.length) !== updatedItems.length || updatedItems.some((item, i) => {
+        return Math.abs(item.playout.start - currentItems[i].playout.start) > 0.005 || Math.abs(item.playout.end - currentItems[i].playout.end) > 0.005;
+      });
+      if (updated) {
+        this.items = updatedItems;
+        // call interstitials-controller onScheduleUpdated()
+        this.onScheduleUpdate(removedInterstitials, currentItems);
+      }
+    }
+  }
+  parseDateRanges(dateRanges, baseData, enableAppendInPlace) {
+    const interstitialEvents = [];
+    const ids = Object.keys(dateRanges);
+    for (let i = 0; i < ids.length; i++) {
+      const id = ids[i];
+      const dateRange = dateRanges[id];
+      if (dateRange.isInterstitial) {
+        let interstitial = this.eventMap[id];
+        if (interstitial) {
+          // Update InterstitialEvent already parsed and mapped
+          // This retains already loaded duration and loaded asset list info
+          interstitial.setDateRange(dateRange);
+        } else {
+          interstitial = new InterstitialEvent(dateRange, baseData);
+          this.eventMap[id] = interstitial;
+          if (enableAppendInPlace === false) {
+            interstitial.appendInPlace = enableAppendInPlace;
+          }
+        }
+        interstitialEvents.push(interstitial);
+      }
+    }
+    return interstitialEvents;
+  }
+  parseSchedule(interstitialEvents, mediaSelection) {
+    const schedule = [];
+    const details = mediaSelection.main.details;
+    const primaryDuration = details.live ? Infinity : details.edge;
+    let playoutDuration = 0;
+
+    // Filter events that have errored from the schedule (Primary fallback)
+    interstitialEvents = interstitialEvents.filter(event => !event.error && !(event.cue.once && event.hasPlayed));
+    if (interstitialEvents.length) {
+      // Update Schedule
+      this.resolveOffsets(interstitialEvents, mediaSelection);
+
+      // Populate Schedule with Interstitial Event and Primary Segment Items
+      let primaryPosition = 0;
+      let integratedTime = 0;
+      interstitialEvents.forEach((interstitial, i) => {
+        const preroll = interstitial.cue.pre;
+        const postroll = interstitial.cue.post;
+        const previousEvent = interstitialEvents[i - 1] || null;
+        const appendInPlace = interstitial.appendInPlace;
+        const eventStart = postroll ? primaryDuration : interstitial.startOffset;
+        const interstitialDuration = interstitial.duration;
+        const timelineDuration = interstitial.timelineOccupancy === TimelineOccupancy.Range ? interstitialDuration : 0;
+        const resumptionOffset = interstitial.resumptionOffset;
+        const inSameStartTimeSequence = (previousEvent == null ? void 0 : previousEvent.startTime) === eventStart;
+        const start = eventStart + interstitial.cumulativeDuration;
+        let end = appendInPlace ? start + interstitialDuration : eventStart + resumptionOffset;
+        if (preroll || !postroll && eventStart <= 0) {
+          // preroll or in-progress midroll
+          const integratedStart = integratedTime;
+          integratedTime += timelineDuration;
+          interstitial.timelineStart = start;
+          const playoutStart = playoutDuration;
+          playoutDuration += interstitialDuration;
+          schedule.push({
+            event: interstitial,
+            start,
+            end,
+            playout: {
+              start: playoutStart,
+              end: playoutDuration
+            },
+            integrated: {
+              start: integratedStart,
+              end: integratedTime
+            }
+          });
+        } else if (eventStart <= primaryDuration) {
+          if (!inSameStartTimeSequence) {
+            const segmentDuration = eventStart - primaryPosition;
+            // Do not schedule a primary segment if interstitials are abutting by less than ABUTTING_THRESHOLD_SECONDS
+            if (segmentDuration > ABUTTING_THRESHOLD_SECONDS) {
+              // primary segment
+              const timelineStart = primaryPosition;
+              const _integratedStart = integratedTime;
+              integratedTime += segmentDuration;
+              const _playoutStart = playoutDuration;
+              playoutDuration += segmentDuration;
+              const primarySegment = {
+                previousEvent: interstitialEvents[i - 1] || null,
+                nextEvent: interstitial,
+                start: timelineStart,
+                end: timelineStart + segmentDuration,
+                playout: {
+                  start: _playoutStart,
+                  end: playoutDuration
+                },
+                integrated: {
+                  start: _integratedStart,
+                  end: integratedTime
+                }
+              };
+              schedule.push(primarySegment);
+            } else if (segmentDuration > 0 && previousEvent) {
+              // Add previous event `resumeTime` (based on duration or resumeOffset) so that it ends aligned with this one
+              previousEvent.cumulativeDuration += segmentDuration;
+              schedule[schedule.length - 1].end = eventStart;
+            }
+          }
+          // midroll / postroll
+          if (postroll) {
+            end = start;
+          }
+          interstitial.timelineStart = start;
+          const integratedStart = integratedTime;
+          integratedTime += timelineDuration;
+          const playoutStart = playoutDuration;
+          playoutDuration += interstitialDuration;
+          schedule.push({
+            event: interstitial,
+            start,
+            end,
+            playout: {
+              start: playoutStart,
+              end: playoutDuration
+            },
+            integrated: {
+              start: integratedStart,
+              end: integratedTime
+            }
+          });
+        } else {
+          // Interstitial starts after end of primary VOD - not included in schedule
+          return;
+        }
+        const resumeTime = interstitial.resumeTime;
+        if (postroll || resumeTime > primaryDuration) {
+          primaryPosition = primaryDuration;
+        } else {
+          primaryPosition = resumeTime;
+        }
+      });
+      if (primaryPosition < primaryDuration) {
+        var _schedule;
+        // last primary segment
+        const timelineStart = primaryPosition;
+        const integratedStart = integratedTime;
+        const segmentDuration = primaryDuration - primaryPosition;
+        integratedTime += segmentDuration;
+        const playoutStart = playoutDuration;
+        playoutDuration += segmentDuration;
+        schedule.push({
+          previousEvent: ((_schedule = schedule[schedule.length - 1]) == null ? void 0 : _schedule.event) || null,
+          nextEvent: null,
+          start: primaryPosition,
+          end: timelineStart + segmentDuration,
+          playout: {
+            start: playoutStart,
+            end: playoutDuration
+          },
+          integrated: {
+            start: integratedStart,
+            end: integratedTime
+          }
+        });
+      }
+      this.setDurations(primaryDuration, playoutDuration, integratedTime);
+    } else {
+      // no interstials - schedule is one primary segment
+      const start = 0;
+      schedule.push({
+        previousEvent: null,
+        nextEvent: null,
+        start,
+        end: primaryDuration,
+        playout: {
+          start,
+          end: primaryDuration
+        },
+        integrated: {
+          start,
+          end: primaryDuration
+        }
+      });
+      this.setDurations(primaryDuration, primaryDuration, primaryDuration);
+    }
+    return schedule;
+  }
+  setDurations(primary, playout, integrated) {
+    this.durations = {
+      primary,
+      playout,
+      integrated
+    };
+  }
+  resolveOffsets(interstitialEvents, mediaSelection) {
+    const details = mediaSelection.main.details;
+    const primaryDuration = details.live ? Infinity : details.edge;
+
+    // First resolve cumulative resumption offsets for Interstitials that start at the same DateTime
+    let cumulativeDuration = 0;
+    let lastScheduledStart = -1;
+    interstitialEvents.forEach((interstitial, i) => {
+      const preroll = interstitial.cue.pre;
+      const postroll = interstitial.cue.post;
+      const eventStart = preroll ? 0 : postroll ? primaryDuration : interstitial.startTime;
+      this.updateAssetDurations(interstitial);
+
+      // X-RESUME-OFFSET values of interstitials scheduled at the same time are cumulative
+      const inSameStartTimeSequence = lastScheduledStart === eventStart;
+      if (inSameStartTimeSequence) {
+        interstitial.cumulativeDuration = cumulativeDuration;
+      } else {
+        cumulativeDuration = 0;
+        lastScheduledStart = eventStart;
+      }
+      if (!postroll && interstitial.snapOptions.in) {
+        // FIXME: Include audio playlist in snapping
+        interstitial.resumeAnchor = findFragmentByPTS(null, details.fragments, interstitial.startOffset + interstitial.resumptionOffset, 0, 0) || undefined;
+      }
+      // Check if primary fragments align with resumption offset and disable appendInPlace if they do not
+      if (interstitial.appendInPlace && !interstitial.appendInPlaceStarted) {
+        const alignedSegmentStart = this.primaryCanResumeInPlaceAt(interstitial, mediaSelection);
+        if (!alignedSegmentStart) {
+          interstitial.appendInPlace = false;
+        }
+      }
+      if (!interstitial.appendInPlace && i + 1 < interstitialEvents.length) {
+        // abutting Interstitials must use the same MediaSource strategy, this applies to all whether or not they are back to back:
+        const timeBetween = interstitialEvents[i + 1].startTime - interstitialEvents[i].resumeTime;
+        if (timeBetween < ABUTTING_THRESHOLD_SECONDS) {
+          interstitialEvents[i + 1].appendInPlace = false;
+          if (interstitialEvents[i + 1].appendInPlace) {
+            this.warn(`Could not change append strategy for abutting event ${interstitial}`);
+          }
+        }
+      }
+      // Update cumulativeDuration for next abutting interstitial with the same start date
+      const resumeOffset = isFiniteNumber(interstitial.resumeOffset) ? interstitial.resumeOffset : interstitial.duration;
+      cumulativeDuration += resumeOffset;
+    });
+  }
+  primaryCanResumeInPlaceAt(interstitial, mediaSelection) {
+    const resumeTime = interstitial.resumeTime;
+    const resumesInPlaceAt = interstitial.startTime + interstitial.resumptionOffset;
+    if (Math.abs(resumeTime - resumesInPlaceAt) > ALIGNED_END_THRESHOLD_SECONDS) {
+      this.log(`"${interstitial.identifier}" resumption ${resumeTime} not aligned with estimated timeline end ${resumesInPlaceAt}`);
+      return false;
+    }
+    const playlists = Object.keys(mediaSelection);
+    return !playlists.some(playlistType => {
+      const details = mediaSelection[playlistType].details;
+      const playlistEnd = details.edge;
+      if (resumeTime >= playlistEnd) {
+        // Live playback - resumption segments are not yet available
+        this.log(`"${interstitial.identifier}" resumption ${resumeTime} past ${playlistType} playlist end ${playlistEnd}`);
+        // Assume alignment is possible (or reset can take place)
+        return false;
+      }
+      const startFragment = findFragmentByPTS(null, details.fragments, resumeTime);
+      if (!startFragment) {
+        this.log(`"${interstitial.identifier}" resumption ${resumeTime} does not align with any fragments in ${playlistType} playlist (${details.fragStart}-${details.fragmentEnd})`);
+        return true;
+      }
+      const allowance = playlistType === 'audio' ? 0.175 : 0;
+      const alignedWithSegment = Math.abs(startFragment.start - resumeTime) < ALIGNED_END_THRESHOLD_SECONDS + allowance || Math.abs(startFragment.end - resumeTime) < ALIGNED_END_THRESHOLD_SECONDS + allowance;
+      if (!alignedWithSegment) {
+        this.log(`"${interstitial.identifier}" resumption ${resumeTime} not aligned with ${playlistType} fragment bounds (${startFragment.start}-${startFragment.end} sn: ${startFragment.sn} cc: ${startFragment.cc})`);
+        return true;
+      }
+      return false;
+    });
+  }
+  updateAssetDurations(interstitial) {
+    if (!interstitial.assetListLoaded) {
+      return;
+    }
+    const eventStart = interstitial.timelineStart;
+    let sumDuration = 0;
+    let hasUnknownDuration = false;
+    let hasErrors = false;
+    for (let i = 0; i < interstitial.assetList.length; i++) {
+      const asset = interstitial.assetList[i];
+      const timelineStart = eventStart + sumDuration;
+      asset.startOffset = sumDuration;
+      asset.timelineStart = timelineStart;
+      hasUnknownDuration || (hasUnknownDuration = asset.duration === null);
+      hasErrors || (hasErrors = !!asset.error);
+      const duration = asset.error ? 0 : asset.duration || 0;
+      sumDuration += duration;
+    }
+    // Use the sum of known durations when it is greater than the stated duration
+    if (hasUnknownDuration && !hasErrors) {
+      interstitial.duration = Math.max(sumDuration, interstitial.duration);
+    } else {
+      interstitial.duration = sumDuration;
+    }
+  }
+  removeEvent(interstitial) {
+    interstitial.reset();
+    delete this.eventMap[interstitial.identifier];
+  }
+}
+function segmentToString(segment) {
+  return `[${segment.event ? '"' + segment.event.identifier + '"' : 'primary'}: ${segment.start.toFixed(2)}-${segment.end.toFixed(2)}]`;
+}
+
+class AssetListLoader {
+  constructor(hls) {
+    this.hls = void 0;
+    this.hls = hls;
+  }
+  destroy() {
+    // @ts-ignore
+    this.hls = null;
+  }
+  loadAssetList(interstitial, hlsStartOffset) {
+    const assetListUrl = interstitial.assetListUrl;
+    let url;
+    try {
+      url = getInterstitialUrl(assetListUrl, this.hls.sessionId, interstitial.baseUrl);
+    } catch (error) {
+      const errorData = this.assignAssetListError(interstitial, ErrorDetails.ASSET_LIST_LOAD_ERROR, error, assetListUrl);
+      this.hls.trigger(Events.ERROR, errorData);
+      return;
+    }
+    if (hlsStartOffset && url.protocol !== 'data:') {
+      url.searchParams.set('_HLS_start_offset', '' + hlsStartOffset);
+    }
+    const config = this.hls.config;
+    const Loader = config.loader;
+    const loader = new Loader(config);
+    const context = {
+      responseType: 'json',
+      url: url.href
+    };
+    const loadPolicy = config.interstitialAssetListLoadPolicy.default;
+    const loaderConfig = {
+      loadPolicy,
+      timeout: loadPolicy.maxLoadTimeMs,
+      maxRetry: 0,
+      retryDelay: 0,
+      maxRetryDelay: 0
+    };
+    const callbacks = {
+      onSuccess: (response, stats, context, networkDetails) => {
+        const assetListResponse = response.data;
+        const assets = assetListResponse == null ? void 0 : assetListResponse.ASSETS;
+        if (!Array.isArray(assets)) {
+          const errorData = this.assignAssetListError(interstitial, ErrorDetails.ASSET_LIST_PARSING_ERROR, new Error(`Invalid interstitial asset list`), context.url, stats, networkDetails);
+          this.hls.trigger(Events.ERROR, errorData);
+          return;
+        }
+        interstitial.assetListResponse = assetListResponse;
+        this.hls.trigger(Events.ASSET_LIST_LOADED, {
+          event: interstitial,
+          assetListResponse,
+          networkDetails
+        });
+      },
+      onError: (error, context, networkDetails, stats) => {
+        const errorData = this.assignAssetListError(interstitial, ErrorDetails.ASSET_LIST_LOAD_ERROR, new Error(`Error loading X-ASSET-LIST: HTTP status ${error.code} ${error.text} (${context.url})`), context.url, stats, networkDetails);
+        this.hls.trigger(Events.ERROR, errorData);
+      },
+      onTimeout: (stats, context, networkDetails) => {
+        const errorData = this.assignAssetListError(interstitial, ErrorDetails.ASSET_LIST_LOAD_TIMEOUT, new Error(`Timeout loading X-ASSET-LIST (${context.url})`), context.url, stats, networkDetails);
+        this.hls.trigger(Events.ERROR, errorData);
+      }
+    };
+    loader.load(context, loaderConfig, callbacks);
+    this.hls.trigger(Events.ASSET_LIST_LOADING, {
+      event: interstitial
+    });
+    return loader;
+  }
+  assignAssetListError(interstitial, details, error, url, stats, networkDetails) {
+    interstitial.error = error;
+    return {
+      type: ErrorTypes.NETWORK_ERROR,
+      details,
+      fatal: false,
+      interstitial,
+      url,
+      error,
+      networkDetails,
+      stats
+    };
+  }
+}
+
+function playWithCatch(media) {
+  var _media$play;
+  media == null || (_media$play = media.play()) == null || _media$play.catch(() => {
+    /* no-op */
+  });
+}
+function timelineMessage(label, time) {
+  return `[${label}] Advancing timeline position to ${time}`;
+}
+class InterstitialsController extends Logger {
+  constructor(hls, HlsPlayerClass) {
+    super('interstitials', hls.logger);
+    this.HlsPlayerClass = void 0;
+    this.hls = void 0;
+    this.assetListLoader = void 0;
+    // Last updated LevelDetails
+    this.mediaSelection = null;
+    this.altSelection = null;
+    // Media and MediaSource/SourceBuffers
+    this.media = null;
+    this.detachedData = null;
+    this.requiredTracks = null;
+    // Public Interface for Interstitial playback state and control
+    this.manager = null;
+    // Interstitial Asset Players
+    this.playerQueue = [];
+    // Timeline position tracking
+    this.bufferedPos = -1;
+    this.timelinePos = -1;
+    // Schedule
+    this.schedule = void 0;
+    // Schedule playback and buffering state
+    this.playingItem = null;
+    this.bufferingItem = null;
+    this.waitingItem = null;
+    this.endedItem = null;
+    this.playingAsset = null;
+    this.endedAsset = null;
+    this.bufferingAsset = null;
+    this.shouldPlay = false;
+    this.onPlay = () => {
+      this.shouldPlay = true;
+    };
+    this.onPause = () => {
+      this.shouldPlay = false;
+    };
+    this.onSeeking = () => {
+      const currentTime = this.currentTime;
+      if (currentTime === undefined || this.playbackDisabled || !this.schedule) {
+        return;
+      }
+      const diff = currentTime - this.timelinePos;
+      const roundingError = Math.abs(diff) < 1 / 705600000; // one flick
+      if (roundingError) {
+        return;
+      }
+      const backwardSeek = diff <= -0.01;
+      if (this.timelinePos === -1 && !this.effectivePlayingItem) {
+        this.checkStart();
+      }
+      this.timelinePos = currentTime;
+      this.bufferedPos = currentTime;
+
+      // Check if seeking out of an item
+      const playingItem = this.playingItem;
+      if (!playingItem) {
+        this.checkBuffer();
+        return;
+      }
+      if (backwardSeek) {
+        const resetCount = this.schedule.resetErrorsInRange(currentTime, currentTime - diff);
+        if (resetCount) {
+          this.updateSchedule(true);
+        }
+      }
+      this.checkBuffer();
+      if (backwardSeek && currentTime < playingItem.start || currentTime >= playingItem.end) {
+        var _this$media;
+        const playingIndex = this.findItemIndex(playingItem);
+        let scheduleIndex = this.schedule.findItemIndexAtTime(currentTime);
+        if (scheduleIndex === -1) {
+          scheduleIndex = playingIndex + (backwardSeek ? -1 : 1);
+          this.log(`seeked ${backwardSeek ? 'back ' : ''}to position not covered by schedule ${currentTime} (resolving from ${playingIndex} to ${scheduleIndex})`);
+        }
+        if (!this.isInterstitial(playingItem) && (_this$media = this.media) != null && _this$media.paused) {
+          this.shouldPlay = false;
+        }
+        if (!backwardSeek) {
+          // check if an Interstitial between the current item and target item has an X-RESTRICT JUMP restriction
+          if (scheduleIndex > playingIndex) {
+            const jumpIndex = this.schedule.findJumpRestrictedIndex(playingIndex + 1, scheduleIndex);
+            if (jumpIndex > playingIndex) {
+              this.setSchedulePosition(jumpIndex);
+              return;
+            }
+          }
+        }
+        this.setSchedulePosition(scheduleIndex);
+        return;
+      }
+      // Check if seeking out of an asset (assumes same item following above check)
+      const playingAsset = this.playingAsset;
+      if (!playingAsset) {
+        // restart Interstitial at end
+        if (this.playingLastItem && this.isInterstitial(playingItem)) {
+          const restartAsset = playingItem.event.assetList[0];
+          // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+          if (restartAsset) {
+            this.endedItem = this.playingItem;
+            this.playingItem = null;
+            this.setScheduleToAssetAtTime(currentTime, restartAsset);
+          }
+        }
+        return;
+      }
+      const start = playingAsset.timelineStart;
+      const duration = playingAsset.duration || 0;
+      if (backwardSeek && currentTime < start || currentTime >= start + duration) {
+        var _playingItem$event;
+        if ((_playingItem$event = playingItem.event) != null && _playingItem$event.appendInPlace) {
+          // Return SourceBuffer(s) to primary player and flush
+          this.clearAssetPlayers(playingItem.event, playingItem);
+          this.flushFrontBuffer(currentTime);
+        }
+        this.setScheduleToAssetAtTime(currentTime, playingAsset);
+      }
+    };
+    this.onTimeupdate = () => {
+      const currentTime = this.currentTime;
+      if (currentTime === undefined || this.playbackDisabled) {
+        return;
+      }
+      if (this.timelinePos === -1 && !this.effectivePlayingItem) {
+        this.checkStart();
+      }
+
+      // Only allow timeupdate to advance primary position, seeking is used for jumping back
+      // this prevents primaryPos from being reset to 0 after re-attach
+      if (currentTime > this.timelinePos) {
+        this.timelinePos = currentTime;
+        if (currentTime > this.bufferedPos) {
+          this.checkBuffer();
+        }
+      } else {
+        return;
+      }
+
+      // Check if playback has entered the next item
+      const playingItem = this.playingItem;
+      if (!playingItem || this.playingLastItem) {
+        return;
+      }
+      if (currentTime >= playingItem.end) {
+        this.timelinePos = playingItem.end;
+        const playingIndex = this.findItemIndex(playingItem);
+        this.setSchedulePosition(playingIndex + 1);
+      }
+      // Check if playback has entered the next asset
+      const playingAsset = this.playingAsset;
+      if (!playingAsset) {
+        return;
+      }
+      const end = playingAsset.timelineStart + (playingAsset.duration || 0);
+      if (currentTime >= end) {
+        this.setScheduleToAssetAtTime(currentTime, playingAsset);
+      }
+    };
+    // Schedule update callback
+    this.onScheduleUpdate = (removedInterstitials, previousItems) => {
+      const schedule = this.schedule;
+      if (!schedule) {
+        return;
+      }
+      const playingItem = this.playingItem;
+      const interstitialEvents = schedule.events || [];
+      const scheduleItems = schedule.items || [];
+      const durations = schedule.durations;
+      const removedIds = removedInterstitials.map(interstitial => interstitial.identifier);
+      const interstitialsUpdated = !!(interstitialEvents.length || removedIds.length);
+      if (interstitialsUpdated || previousItems) {
+        this.log(`INTERSTITIALS_UPDATED (${interstitialEvents.length}): ${interstitialEvents}
+Schedule: ${scheduleItems.map(seg => segmentToString(seg))} pos: ${this.timelinePos}`);
+      }
+      if (removedIds.length) {
+        this.log(`Removed events ${removedIds}`);
+      }
+
+      // Update schedule item references
+      // Do not replace Interstitial playingItem without a match - used for INTERSTITIAL_ASSET_ENDED and INTERSTITIAL_ENDED
+      let updatedPlayingItem = null;
+      let updatedBufferingItem = null;
+      if (playingItem) {
+        updatedPlayingItem = this.updateItem(playingItem, this.timelinePos);
+        if (this.itemsMatch(playingItem, updatedPlayingItem)) {
+          this.playingItem = updatedPlayingItem;
+        } else {
+          this.waitingItem = this.endedItem = null;
+        }
+      }
+      // Clear waitingItem if it has been removed from the schedule
+      this.waitingItem = this.updateItem(this.waitingItem);
+      this.endedItem = this.updateItem(this.endedItem);
+      // Do not replace Interstitial bufferingItem without a match - used for transfering media element or source
+      const bufferingItem = this.bufferingItem;
+      if (bufferingItem) {
+        updatedBufferingItem = this.updateItem(bufferingItem, this.bufferedPos);
+        if (this.itemsMatch(bufferingItem, updatedBufferingItem)) {
+          this.bufferingItem = updatedBufferingItem;
+        } else if (bufferingItem.event) {
+          // Interstitial removed from schedule (Live -> VOD or other scenario where Start Date is outside the range of VOD Playlist)
+          this.bufferingItem = this.playingItem;
+          this.clearInterstitial(bufferingItem.event, null);
+        }
+      }
+      removedInterstitials.forEach(interstitial => {
+        interstitial.assetList.forEach(asset => {
+          this.clearAssetPlayer(asset.identifier, null);
+        });
+      });
+      this.playerQueue.forEach(player => {
+        if (player.interstitial.appendInPlace) {
+          const timelineStart = player.assetItem.timelineStart;
+          const diff = player.timelineOffset - timelineStart;
+          if (diff) {
+            try {
+              player.timelineOffset = timelineStart;
+            } catch (e) {
+              if (Math.abs(diff) > ALIGNED_END_THRESHOLD_SECONDS) {
+                this.warn(`${e} ("${player.assetId}" ${player.timelineOffset}->${timelineStart})`);
+              }
+            }
+          }
+        }
+      });
+      if (interstitialsUpdated || previousItems) {
+        this.hls.trigger(Events.INTERSTITIALS_UPDATED, {
+          events: interstitialEvents.slice(0),
+          schedule: scheduleItems.slice(0),
+          durations,
+          removedIds
+        });
+        if (this.isInterstitial(playingItem) && removedIds.includes(playingItem.event.identifier)) {
+          this.warn(`Interstitial "${playingItem.event.identifier}" removed while playing`);
+          this.primaryFallback(playingItem.event);
+          return;
+        }
+        if (playingItem) {
+          this.trimInPlace(updatedPlayingItem, playingItem);
+        }
+        if (bufferingItem && updatedBufferingItem !== updatedPlayingItem) {
+          this.trimInPlace(updatedBufferingItem, bufferingItem);
+        }
+
+        // Check if buffered to new Interstitial event boundary
+        // (Live update publishes Interstitial with new segment)
+        this.checkBuffer();
+      }
+    };
+    this.hls = hls;
+    this.HlsPlayerClass = HlsPlayerClass;
+    this.assetListLoader = new AssetListLoader(hls);
+    this.schedule = new InterstitialsSchedule(this.onScheduleUpdate, hls.logger);
+    this.registerListeners();
+  }
+  registerListeners() {
+    const hls = this.hls;
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    if (hls) {
+      hls.on(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+      hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+      hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+      hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+      hls.on(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+      hls.on(Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
+      hls.on(Events.AUDIO_TRACK_UPDATED, this.onAudioTrackUpdated, this);
+      hls.on(Events.SUBTITLE_TRACK_SWITCH, this.onSubtitleTrackSwitch, this);
+      hls.on(Events.SUBTITLE_TRACK_UPDATED, this.onSubtitleTrackUpdated, this);
+      hls.on(Events.EVENT_CUE_ENTER, this.onInterstitialCueEnter, this);
+      hls.on(Events.ASSET_LIST_LOADED, this.onAssetListLoaded, this);
+      hls.on(Events.BUFFER_APPENDED, this.onBufferAppended, this);
+      hls.on(Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
+      hls.on(Events.BUFFERED_TO_END, this.onBufferedToEnd, this);
+      hls.on(Events.MEDIA_ENDED, this.onMediaEnded, this);
+      hls.on(Events.ERROR, this.onError, this);
+      hls.on(Events.DESTROYING, this.onDestroying, this);
+    }
+  }
+  unregisterListeners() {
+    const hls = this.hls;
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    if (hls) {
+      hls.off(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+      hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+      hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+      hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+      hls.off(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+      hls.off(Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
+      hls.off(Events.AUDIO_TRACK_UPDATED, this.onAudioTrackUpdated, this);
+      hls.off(Events.SUBTITLE_TRACK_SWITCH, this.onSubtitleTrackSwitch, this);
+      hls.off(Events.SUBTITLE_TRACK_UPDATED, this.onSubtitleTrackUpdated, this);
+      hls.off(Events.EVENT_CUE_ENTER, this.onInterstitialCueEnter, this);
+      hls.off(Events.ASSET_LIST_LOADED, this.onAssetListLoaded, this);
+      hls.off(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+      hls.off(Events.BUFFER_APPENDED, this.onBufferAppended, this);
+      hls.off(Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
+      hls.off(Events.BUFFERED_TO_END, this.onBufferedToEnd, this);
+      hls.off(Events.MEDIA_ENDED, this.onMediaEnded, this);
+      hls.off(Events.ERROR, this.onError, this);
+      hls.off(Events.DESTROYING, this.onDestroying, this);
+    }
+  }
+  startLoad() {
+    // TODO: startLoad - check for waitingItem and retry by resetting schedule
+    this.resumeBuffering();
+  }
+  stopLoad() {
+    // TODO: stopLoad - stop all scheule.events[].assetListLoader?.abort() then delete the loaders
+    this.pauseBuffering();
+  }
+  resumeBuffering() {
+    var _this$getBufferingPla;
+    (_this$getBufferingPla = this.getBufferingPlayer()) == null || _this$getBufferingPla.resumeBuffering();
+  }
+  pauseBuffering() {
+    var _this$getBufferingPla2;
+    (_this$getBufferingPla2 = this.getBufferingPlayer()) == null || _this$getBufferingPla2.pauseBuffering();
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.stopLoad();
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    if (this.assetListLoader) {
+      this.assetListLoader.destroy();
+    }
+    this.emptyPlayerQueue();
+    this.clearScheduleState();
+    if (this.schedule) {
+      this.schedule.destroy();
+    }
+    this.media = this.detachedData = this.mediaSelection = this.requiredTracks = this.altSelection = this.schedule = this.manager = null;
+    // @ts-ignore
+    this.hls = this.HlsPlayerClass = this.log = null;
+    // @ts-ignore
+    this.assetListLoader = null;
+    // @ts-ignore
+    this.onPlay = this.onPause = this.onSeeking = this.onTimeupdate = null;
+    // @ts-ignore
+    this.onScheduleUpdate = null;
+  }
+  onDestroying() {
+    const media = this.primaryMedia || this.media;
+    if (media) {
+      this.removeMediaListeners(media);
+    }
+  }
+  removeMediaListeners(media) {
+    removeEventListener(media, 'play', this.onPlay);
+    removeEventListener(media, 'pause', this.onPause);
+    removeEventListener(media, 'seeking', this.onSeeking);
+    removeEventListener(media, 'timeupdate', this.onTimeupdate);
+  }
+  onMediaAttaching(event, data) {
+    const media = this.media = data.media;
+    addEventListener(media, 'seeking', this.onSeeking);
+    addEventListener(media, 'timeupdate', this.onTimeupdate);
+    addEventListener(media, 'play', this.onPlay);
+    addEventListener(media, 'pause', this.onPause);
+  }
+  onMediaAttached(event, data) {
+    const playingItem = this.effectivePlayingItem;
+    const detachedMedia = this.detachedData;
+    this.detachedData = null;
+    if (playingItem === null) {
+      this.checkStart();
+    } else if (!detachedMedia) {
+      // Resume schedule after detached externally
+      this.clearScheduleState();
+      const playingIndex = this.findItemIndex(playingItem);
+      this.setSchedulePosition(playingIndex);
+    }
+  }
+  clearScheduleState() {
+    this.log(`clear schedule state`);
+    this.playingItem = this.bufferingItem = this.waitingItem = this.endedItem = this.playingAsset = this.endedAsset = this.bufferingAsset = null;
+  }
+  onMediaDetaching(event, data) {
+    const transferringMedia = !!data.transferMedia;
+    const media = this.media;
+    this.media = null;
+    if (transferringMedia) {
+      return;
+    }
+    if (media) {
+      this.removeMediaListeners(media);
+    }
+    // If detachMedia is called while in an Interstitial, detach the asset player as well and reset the schedule position
+    if (this.detachedData) {
+      const player = this.getBufferingPlayer();
+      if (player) {
+        this.log(`Removing schedule state for detachedData and ${player}`);
+        this.playingAsset = this.endedAsset = this.bufferingAsset = this.bufferingItem = this.waitingItem = this.detachedData = null;
+        player.detachMedia();
+      }
+      this.shouldPlay = false;
+    }
+  }
+  get interstitialsManager() {
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    if (!this.hls) {
+      return null;
+    }
+    if (this.manager) {
+      return this.manager;
+    }
+    const c = this;
+    const effectiveBufferingItem = () => c.bufferingItem || c.waitingItem;
+    const getAssetPlayer = asset => asset ? c.getAssetPlayer(asset.identifier) : asset;
+    const getMappedTime = (item, timelineType, asset, controllerField, assetPlayerField) => {
+      if (item) {
+        let time = item[timelineType].start;
+        const interstitial = item.event;
+        if (interstitial) {
+          if (timelineType === 'playout' || interstitial.timelineOccupancy !== TimelineOccupancy.Point) {
+            const assetPlayer = getAssetPlayer(asset);
+            if ((assetPlayer == null ? void 0 : assetPlayer.interstitial) === interstitial) {
+              time += assetPlayer.assetItem.startOffset + assetPlayer[assetPlayerField];
+            }
+          }
+        } else {
+          const value = controllerField === 'bufferedPos' ? getBufferedEnd() : c[controllerField];
+          time += value - item.start;
+        }
+        return time;
+      }
+      return 0;
+    };
+    const findMappedTime = (primaryTime, timelineType) => {
+      var _c$schedule;
+      if (primaryTime !== 0 && timelineType !== 'primary' && (_c$schedule = c.schedule) != null && _c$schedule.length) {
+        var _c$schedule$items;
+        const index = c.schedule.findItemIndexAtTime(primaryTime);
+        const item = (_c$schedule$items = c.schedule.items) == null ? void 0 : _c$schedule$items[index];
+        if (item) {
+          const diff = item[timelineType].start - item.start;
+          return primaryTime + diff;
+        }
+      }
+      return primaryTime;
+    };
+    const getBufferedEnd = () => {
+      const value = c.bufferedPos;
+      if (value === Number.MAX_VALUE) {
+        return getMappedDuration('primary');
+      }
+      return Math.max(value, 0);
+    };
+    const getMappedDuration = timelineType => {
+      var _c$primaryDetails, _c$schedule2;
+      if ((_c$primaryDetails = c.primaryDetails) != null && _c$primaryDetails.live) {
+        // return end of last event item or playlist
+        return c.primaryDetails.edge;
+      }
+      return ((_c$schedule2 = c.schedule) == null ? void 0 : _c$schedule2.durations[timelineType]) || 0;
+    };
+    const seekTo = (time, timelineType) => {
+      var _item$event, _c$schedule$items2;
+      const item = c.effectivePlayingItem;
+      if (item != null && (_item$event = item.event) != null && _item$event.restrictions.skip || !c.schedule) {
+        return;
+      }
+      c.log(`seek to ${time} "${timelineType}"`);
+      const playingItem = c.effectivePlayingItem;
+      const targetIndex = c.schedule.findItemIndexAtTime(time, timelineType);
+      const targetItem = (_c$schedule$items2 = c.schedule.items) == null ? void 0 : _c$schedule$items2[targetIndex];
+      const bufferingPlayer = c.getBufferingPlayer();
+      const bufferingInterstitial = bufferingPlayer == null ? void 0 : bufferingPlayer.interstitial;
+      const appendInPlace = bufferingInterstitial == null ? void 0 : bufferingInterstitial.appendInPlace;
+      const seekInItem = playingItem && c.itemsMatch(playingItem, targetItem);
+      if (playingItem && (appendInPlace || seekInItem)) {
+        // seek in asset player or primary media (appendInPlace)
+        const assetPlayer = getAssetPlayer(c.playingAsset);
+        const media = (assetPlayer == null ? void 0 : assetPlayer.media) || c.primaryMedia;
+        if (media) {
+          const currentTime = timelineType === 'primary' ? media.currentTime : getMappedTime(playingItem, timelineType, c.playingAsset, 'timelinePos', 'currentTime');
+          const diff = time - currentTime;
+          const seekToTime = (appendInPlace ? currentTime : media.currentTime) + diff;
+          if (seekToTime >= 0 && (!assetPlayer || appendInPlace || seekToTime <= assetPlayer.duration)) {
+            media.currentTime = seekToTime;
+            return;
+          }
+        }
+      }
+      // seek out of item or asset
+      if (targetItem) {
+        let seekToTime = time;
+        if (timelineType !== 'primary') {
+          const primarySegmentStart = targetItem[timelineType].start;
+          const diff = time - primarySegmentStart;
+          seekToTime = targetItem.start + diff;
+        }
+        const targetIsPrimary = !c.isInterstitial(targetItem);
+        if ((!c.isInterstitial(playingItem) || playingItem.event.appendInPlace) && (targetIsPrimary || targetItem.event.appendInPlace)) {
+          const media = c.media || (appendInPlace ? bufferingPlayer == null ? void 0 : bufferingPlayer.media : null);
+          if (media) {
+            media.currentTime = seekToTime;
+          }
+        } else if (playingItem) {
+          // check if an Interstitial between the current item and target item has an X-RESTRICT JUMP restriction
+          const playingIndex = c.findItemIndex(playingItem);
+          if (targetIndex > playingIndex) {
+            const jumpIndex = c.schedule.findJumpRestrictedIndex(playingIndex + 1, targetIndex);
+            if (jumpIndex > playingIndex) {
+              c.setSchedulePosition(jumpIndex);
+              return;
+            }
+          }
+          let assetIndex = 0;
+          if (targetIsPrimary) {
+            c.timelinePos = seekToTime;
+            c.checkBuffer();
+          } else {
+            const assetList = targetItem.event.assetList;
+            const eventTime = time - (targetItem[timelineType] || targetItem).start;
+            for (let i = assetList.length; i--;) {
+              const asset = assetList[i];
+              if (asset.duration && eventTime >= asset.startOffset && eventTime < asset.startOffset + asset.duration) {
+                assetIndex = i;
+                break;
+              }
+            }
+          }
+          c.setSchedulePosition(targetIndex, assetIndex);
+        }
+      }
+    };
+    const getActiveInterstitial = () => {
+      const playingItem = c.effectivePlayingItem;
+      if (c.isInterstitial(playingItem)) {
+        return playingItem;
+      }
+      const bufferingItem = effectiveBufferingItem();
+      if (c.isInterstitial(bufferingItem)) {
+        return bufferingItem;
+      }
+      return null;
+    };
+    const interstitialPlayer = {
+      get bufferedEnd() {
+        const interstitialItem = effectiveBufferingItem();
+        const bufferingItem = c.bufferingItem;
+        if (bufferingItem && bufferingItem === interstitialItem) {
+          var _c$bufferingAsset;
+          return getMappedTime(bufferingItem, 'playout', c.bufferingAsset, 'bufferedPos', 'bufferedEnd') - bufferingItem.playout.start || ((_c$bufferingAsset = c.bufferingAsset) == null ? void 0 : _c$bufferingAsset.startOffset) || 0;
+        }
+        return 0;
+      },
+      get currentTime() {
+        const interstitialItem = getActiveInterstitial();
+        const playingItem = c.effectivePlayingItem;
+        if (playingItem && playingItem === interstitialItem) {
+          return getMappedTime(playingItem, 'playout', c.effectivePlayingAsset, 'timelinePos', 'currentTime') - playingItem.playout.start;
+        }
+        return 0;
+      },
+      set currentTime(time) {
+        const interstitialItem = getActiveInterstitial();
+        const playingItem = c.effectivePlayingItem;
+        if (playingItem && playingItem === interstitialItem) {
+          seekTo(time + playingItem.playout.start, 'playout');
+        }
+      },
+      get duration() {
+        const interstitialItem = getActiveInterstitial();
+        if (interstitialItem) {
+          return interstitialItem.playout.end - interstitialItem.playout.start;
+        }
+        return 0;
+      },
+      get assetPlayers() {
+        var _getActiveInterstitia;
+        const assetList = (_getActiveInterstitia = getActiveInterstitial()) == null ? void 0 : _getActiveInterstitia.event.assetList;
+        if (assetList) {
+          return assetList.map(asset => c.getAssetPlayer(asset.identifier));
+        }
+        return [];
+      },
+      get playingIndex() {
+        var _getActiveInterstitia2;
+        const interstitial = (_getActiveInterstitia2 = getActiveInterstitial()) == null ? void 0 : _getActiveInterstitia2.event;
+        if (interstitial && c.effectivePlayingAsset) {
+          return interstitial.findAssetIndex(c.effectivePlayingAsset);
+        }
+        return -1;
+      },
+      get scheduleItem() {
+        return getActiveInterstitial();
+      }
+    };
+    return this.manager = {
+      get events() {
+        var _c$schedule3;
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+        return ((_c$schedule3 = c.schedule) == null || (_c$schedule3 = _c$schedule3.events) == null ? void 0 : _c$schedule3.slice(0)) || [];
+      },
+      get schedule() {
+        var _c$schedule4;
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+        return ((_c$schedule4 = c.schedule) == null || (_c$schedule4 = _c$schedule4.items) == null ? void 0 : _c$schedule4.slice(0)) || [];
+      },
+      get interstitialPlayer() {
+        if (getActiveInterstitial()) {
+          return interstitialPlayer;
+        }
+        return null;
+      },
+      get playerQueue() {
+        return c.playerQueue.slice(0);
+      },
+      get bufferingAsset() {
+        return c.bufferingAsset;
+      },
+      get bufferingItem() {
+        return effectiveBufferingItem();
+      },
+      get bufferingIndex() {
+        const item = effectiveBufferingItem();
+        return c.findItemIndex(item);
+      },
+      get playingAsset() {
+        return c.effectivePlayingAsset;
+      },
+      get playingItem() {
+        return c.effectivePlayingItem;
+      },
+      get playingIndex() {
+        const item = c.effectivePlayingItem;
+        return c.findItemIndex(item);
+      },
+      primary: {
+        get bufferedEnd() {
+          return getBufferedEnd();
+        },
+        get currentTime() {
+          const timelinePos = c.timelinePos;
+          return timelinePos > 0 ? timelinePos : 0;
+        },
+        set currentTime(time) {
+          seekTo(time, 'primary');
+        },
+        get duration() {
+          return getMappedDuration('primary');
+        },
+        get seekableStart() {
+          var _c$primaryDetails2;
+          return ((_c$primaryDetails2 = c.primaryDetails) == null ? void 0 : _c$primaryDetails2.fragmentStart) || 0;
+        }
+      },
+      integrated: {
+        get bufferedEnd() {
+          return getMappedTime(effectiveBufferingItem(), 'integrated', c.bufferingAsset, 'bufferedPos', 'bufferedEnd');
+        },
+        get currentTime() {
+          return getMappedTime(c.effectivePlayingItem, 'integrated', c.effectivePlayingAsset, 'timelinePos', 'currentTime');
+        },
+        set currentTime(time) {
+          seekTo(time, 'integrated');
+        },
+        get duration() {
+          return getMappedDuration('integrated');
+        },
+        get seekableStart() {
+          var _c$primaryDetails3;
+          return findMappedTime(((_c$primaryDetails3 = c.primaryDetails) == null ? void 0 : _c$primaryDetails3.fragmentStart) || 0, 'integrated');
+        }
+      },
+      skip: () => {
+        const item = c.effectivePlayingItem;
+        const event = item == null ? void 0 : item.event;
+        if (event && !event.restrictions.skip) {
+          const index = c.findItemIndex(item);
+          if (event.appendInPlace) {
+            const time = item.playout.start + item.event.duration;
+            seekTo(time + 0.001, 'playout');
+          } else {
+            c.advanceAfterAssetEnded(event, index, Infinity);
+          }
+        }
+      }
+    };
+  }
+
+  // Schedule getters
+  get effectivePlayingItem() {
+    return this.waitingItem || this.playingItem || this.endedItem;
+  }
+  get effectivePlayingAsset() {
+    return this.playingAsset || this.endedAsset;
+  }
+  get playingLastItem() {
+    var _this$schedule;
+    const playingItem = this.playingItem;
+    const items = (_this$schedule = this.schedule) == null ? void 0 : _this$schedule.items;
+    if (!this.playbackStarted || !playingItem || !items) {
+      return false;
+    }
+    return this.findItemIndex(playingItem) === items.length - 1;
+  }
+  get playbackStarted() {
+    return this.effectivePlayingItem !== null;
+  }
+
+  // Media getters and event callbacks
+  get currentTime() {
+    var _this$bufferingItem, _media;
+    if (this.mediaSelection === null) {
+      // Do not advance before schedule is known
+      return undefined;
+    }
+    // Ignore currentTime when detached for Interstitial playback with source reset
+    const queuedForPlayback = this.waitingItem || this.playingItem;
+    if (this.isInterstitial(queuedForPlayback) && !queuedForPlayback.event.appendInPlace) {
+      return undefined;
+    }
+    let media = this.media;
+    if (!media && (_this$bufferingItem = this.bufferingItem) != null && (_this$bufferingItem = _this$bufferingItem.event) != null && _this$bufferingItem.appendInPlace) {
+      // Observe detached media currentTime when appending in place
+      media = this.primaryMedia;
+    }
+    const currentTime = (_media = media) == null ? void 0 : _media.currentTime;
+    if (currentTime === undefined || !isFiniteNumber(currentTime)) {
+      return undefined;
+    }
+    return currentTime;
+  }
+  get primaryMedia() {
+    var _this$detachedData;
+    return this.media || ((_this$detachedData = this.detachedData) == null ? void 0 : _this$detachedData.media) || null;
+  }
+  isInterstitial(item) {
+    return !!(item != null && item.event);
+  }
+  retreiveMediaSource(assetId, toSegment) {
+    const player = this.getAssetPlayer(assetId);
+    if (player) {
+      this.transferMediaFromPlayer(player, toSegment);
+    }
+  }
+  transferMediaFromPlayer(player, toSegment) {
+    const appendInPlace = player.interstitial.appendInPlace;
+    const playerMedia = player.media;
+    if (appendInPlace && playerMedia === this.primaryMedia) {
+      this.bufferingAsset = null;
+      if (!toSegment || this.isInterstitial(toSegment) && !toSegment.event.appendInPlace) {
+        // MediaSource cannot be transfered back to an Interstitial that requires a source reset
+        // no-op when toSegment is undefined
+        if (toSegment && playerMedia) {
+          this.detachedData = {
+            media: playerMedia
+          };
+          return;
+        }
+      }
+      const attachMediaSourceData = player.transferMedia();
+      this.log(`transfer MediaSource from ${player} ${stringify(attachMediaSourceData)}`);
+      this.detachedData = attachMediaSourceData;
+    } else if (toSegment && playerMedia) {
+      this.shouldPlay || (this.shouldPlay = !playerMedia.paused);
+    }
+  }
+  transferMediaTo(player, media) {
+    var _this$detachedData2, _attachMediaSourceDat;
+    if (player.media === media) {
+      return;
+    }
+    let attachMediaSourceData = null;
+    const primaryPlayer = this.hls;
+    const isAssetPlayer = player !== primaryPlayer;
+    const appendInPlace = isAssetPlayer && player.interstitial.appendInPlace;
+    const detachedMediaSource = (_this$detachedData2 = this.detachedData) == null ? void 0 : _this$detachedData2.mediaSource;
+    let logFromSource;
+    if (primaryPlayer.media) {
+      if (appendInPlace) {
+        attachMediaSourceData = primaryPlayer.transferMedia();
+        this.detachedData = attachMediaSourceData;
+      }
+      logFromSource = `Primary`;
+    } else if (detachedMediaSource) {
+      const bufferingPlayer = this.getBufferingPlayer();
+      if (bufferingPlayer) {
+        attachMediaSourceData = bufferingPlayer.transferMedia();
+        logFromSource = `${bufferingPlayer}`;
+      } else {
+        logFromSource = `detached MediaSource`;
+      }
+    } else {
+      logFromSource = `detached media`;
+    }
+    if (!attachMediaSourceData) {
+      if (detachedMediaSource) {
+        attachMediaSourceData = this.detachedData;
+        this.log(`using detachedData: MediaSource ${stringify(attachMediaSourceData)}`);
+      } else if (!this.detachedData || primaryPlayer.media === media) {
+        // Keep interstitial media transition consistent
+        const playerQueue = this.playerQueue;
+        if (playerQueue.length > 1) {
+          playerQueue.forEach(queuedPlayer => {
+            if (isAssetPlayer && queuedPlayer.interstitial.appendInPlace !== appendInPlace) {
+              const interstitial = queuedPlayer.interstitial;
+              this.clearInterstitial(queuedPlayer.interstitial, null);
+              interstitial.appendInPlace = false; // setter may be a no-op;
+              // `appendInPlace` getter may still return `true` after insterstitial streaming has begun in that mode.
+              if (interstitial.appendInPlace) {
+                this.warn(`Could not change append strategy for queued assets ${interstitial}`);
+              }
+            }
+          });
+        }
+        this.hls.detachMedia();
+        this.detachedData = {
+          media
+        };
+      }
+    }
+    const transferring = attachMediaSourceData && 'mediaSource' in attachMediaSourceData && ((_attachMediaSourceDat = attachMediaSourceData.mediaSource) == null ? void 0 : _attachMediaSourceDat.readyState) !== 'closed';
+    const dataToAttach = transferring && attachMediaSourceData ? attachMediaSourceData : media;
+    this.log(`${transferring ? 'transfering MediaSource' : 'attaching media'} to ${isAssetPlayer ? player : 'Primary'} from ${logFromSource} (media.currentTime: ${media.currentTime})`);
+    const schedule = this.schedule;
+    if (dataToAttach === attachMediaSourceData && schedule) {
+      const isAssetAtEndOfSchedule = isAssetPlayer && player.assetId === schedule.assetIdAtEnd;
+      // Prevent asset players from marking EoS on transferred MediaSource
+      dataToAttach.overrides = {
+        duration: schedule.duration,
+        endOfStream: !isAssetPlayer || isAssetAtEndOfSchedule,
+        cueRemoval: !isAssetPlayer
+      };
+    }
+    player.attachMedia(dataToAttach);
+  }
+  onInterstitialCueEnter() {
+    this.onTimeupdate();
+  }
+  // Scheduling methods
+  checkStart() {
+    const schedule = this.schedule;
+    const interstitialEvents = schedule == null ? void 0 : schedule.events;
+    if (!interstitialEvents || this.playbackDisabled || !this.media) {
+      return;
+    }
+    // Check buffered to pre-roll
+    if (this.bufferedPos === -1) {
+      this.bufferedPos = 0;
+    }
+    // Start stepping through schedule when playback begins for the first time and we have a pre-roll
+    const timelinePos = this.timelinePos;
+    const effectivePlayingItem = this.effectivePlayingItem;
+    if (timelinePos === -1) {
+      const startPosition = this.hls.startPosition;
+      this.timelinePos = startPosition;
+      if (interstitialEvents.length === 0) {
+        this.setSchedulePosition(0);
+      } else if (interstitialEvents[0].cue.pre) {
+        this.log(timelineMessage('checkStart (preroll)', startPosition));
+        const index = schedule.findEventIndex(interstitialEvents[0].identifier);
+        this.setSchedulePosition(index);
+      } else if (startPosition >= 0 || !this.primaryLive) {
+        this.log(timelineMessage('checkStart', startPosition));
+        const start = this.timelinePos = startPosition > 0 ? startPosition : 0;
+        const index = schedule.findItemIndexAtTime(start);
+        this.setSchedulePosition(index);
+      } else if (this.hls.liveSyncPosition === 0) {
+        this.setSchedulePosition(0);
+      } else {
+        this.log('[checkStart] waiting for live start');
+      }
+    } else if (effectivePlayingItem && !this.playingItem) {
+      this.log(timelineMessage('checkStart (playing item)', effectivePlayingItem.start));
+      const index = schedule.findItemIndex(effectivePlayingItem);
+      this.setSchedulePosition(index);
+    }
+  }
+  advanceAssetBuffering(item, assetItem) {
+    const interstitial = item.event;
+    const assetListIndex = interstitial.findAssetIndex(assetItem);
+    const nextAssetIndex = getNextAssetIndex(interstitial, assetListIndex);
+    if (!interstitial.isAssetPastPlayoutLimit(nextAssetIndex)) {
+      this.bufferedToEvent(item, nextAssetIndex);
+    } else if (this.schedule) {
+      var _this$schedule$items;
+      const nextItem = (_this$schedule$items = this.schedule.items) == null ? void 0 : _this$schedule$items[this.findItemIndex(item) + 1];
+      if (nextItem) {
+        this.bufferedToItem(nextItem);
+      }
+    }
+  }
+  advanceAfterAssetEnded(interstitial, index, assetListIndex) {
+    const nextAssetIndex = getNextAssetIndex(interstitial, assetListIndex);
+    if (!interstitial.isAssetPastPlayoutLimit(nextAssetIndex)) {
+      // Advance to next asset list item
+      if (interstitial.appendInPlace) {
+        const assetItem = interstitial.assetList[nextAssetIndex];
+        if (assetItem) {
+          this.advanceInPlace(assetItem.timelineStart);
+        }
+      }
+      this.setSchedulePosition(index, nextAssetIndex);
+    } else if (this.schedule) {
+      // Advance to next schedule segment
+      // check if we've reached the end of the program
+      const scheduleItems = this.schedule.items;
+      if (scheduleItems) {
+        const nextIndex = index + 1;
+        const scheduleLength = scheduleItems.length;
+        if (nextIndex >= scheduleLength) {
+          this.setSchedulePosition(-1);
+          return;
+        }
+        const resumptionTime = interstitial.resumeTime;
+        if (this.timelinePos < resumptionTime) {
+          this.log(timelineMessage('advanceAfterAssetEnded', resumptionTime));
+          this.timelinePos = resumptionTime;
+          if (interstitial.appendInPlace) {
+            this.advanceInPlace(resumptionTime);
+          }
+          this.checkBuffer(this.bufferedPos < resumptionTime);
+        }
+        this.setSchedulePosition(nextIndex);
+      }
+    }
+  }
+  setScheduleToAssetAtTime(time, playingAsset) {
+    const schedule = this.schedule;
+    if (!schedule) {
+      return;
+    }
+    const parentIdentifier = playingAsset.parentIdentifier;
+    const interstitial = schedule.getEvent(parentIdentifier);
+    if (interstitial) {
+      const itemIndex = schedule.findEventIndex(parentIdentifier);
+      const assetListIndex = schedule.findAssetIndex(interstitial, time);
+      this.advanceAfterAssetEnded(interstitial, itemIndex, assetListIndex - 1);
+    }
+  }
+  setSchedulePosition(index, assetListIndex) {
+    var _this$schedule2;
+    const scheduleItems = (_this$schedule2 = this.schedule) == null ? void 0 : _this$schedule2.items;
+    if (!scheduleItems || this.playbackDisabled) {
+      return;
+    }
+    const scheduledItem = index >= 0 ? scheduleItems[index] : null;
+    this.log(`setSchedulePosition ${index}, ${assetListIndex} (${scheduledItem ? segmentToString(scheduledItem) : scheduledItem}) pos: ${this.timelinePos}`);
+    // Cleanup current item / asset
+    const currentItem = this.waitingItem || this.playingItem;
+    const playingLastItem = this.playingLastItem;
+    if (this.isInterstitial(currentItem)) {
+      const interstitial = currentItem.event;
+      const playingAsset = this.playingAsset;
+      const assetId = playingAsset == null ? void 0 : playingAsset.identifier;
+      const player = assetId ? this.getAssetPlayer(assetId) : null;
+      if (player && assetId && (!this.eventItemsMatch(currentItem, scheduledItem) || assetListIndex !== undefined && assetId !== interstitial.assetList[assetListIndex].identifier)) {
+        var _this$detachedData3;
+        const playingAssetListIndex = interstitial.findAssetIndex(playingAsset);
+        this.log(`INTERSTITIAL_ASSET_ENDED ${playingAssetListIndex + 1}/${interstitial.assetList.length} ${eventAssetToString(playingAsset)}`);
+        this.endedAsset = playingAsset;
+        this.playingAsset = null;
+        this.hls.trigger(Events.INTERSTITIAL_ASSET_ENDED, {
+          asset: playingAsset,
+          assetListIndex: playingAssetListIndex,
+          event: interstitial,
+          schedule: scheduleItems.slice(0),
+          scheduleIndex: index,
+          player
+        });
+        if (currentItem !== this.playingItem) {
+          // Schedule change occured on INTERSTITIAL_ASSET_ENDED
+          if (this.itemsMatch(currentItem, this.playingItem) &&
+          // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+          !this.playingAsset // INTERSTITIAL_ASSET_ENDED side-effect
+          ) {
+            this.advanceAfterAssetEnded(interstitial, this.findItemIndex(this.playingItem), playingAssetListIndex);
+          }
+          // Navigation occured on INTERSTITIAL_ASSET_ENDED
+          return;
+        }
+        this.retreiveMediaSource(assetId, scheduledItem);
+        if (player.media && !((_this$detachedData3 = this.detachedData) != null && _this$detachedData3.mediaSource)) {
+          player.detachMedia();
+        }
+      }
+      if (!this.eventItemsMatch(currentItem, scheduledItem)) {
+        this.endedItem = currentItem;
+        this.playingItem = null;
+        this.log(`INTERSTITIAL_ENDED ${interstitial} ${segmentToString(currentItem)}`);
+        interstitial.hasPlayed = true;
+        this.hls.trigger(Events.INTERSTITIAL_ENDED, {
+          event: interstitial,
+          schedule: scheduleItems.slice(0),
+          scheduleIndex: index
+        });
+        // Exiting an Interstitial
+        if (interstitial.cue.once) {
+          var _this$schedule3;
+          // Remove interstitial with CUE attribute value of ONCE after it has played
+          this.updateSchedule();
+          const updatedScheduleItems = (_this$schedule3 = this.schedule) == null ? void 0 : _this$schedule3.items;
+          if (scheduledItem && updatedScheduleItems) {
+            const updatedIndex = this.findItemIndex(scheduledItem);
+            this.advanceSchedule(updatedIndex, updatedScheduleItems, assetListIndex, currentItem, playingLastItem);
+          }
+          return;
+        }
+      }
+    }
+    this.advanceSchedule(index, scheduleItems, assetListIndex, currentItem, playingLastItem);
+  }
+  advanceSchedule(index, scheduleItems, assetListIndex, currentItem, playedLastItem) {
+    const schedule = this.schedule;
+    if (!schedule) {
+      return;
+    }
+    const scheduledItem = scheduleItems[index] || null;
+    const media = this.primaryMedia;
+    // Cleanup out of range Interstitials
+    const playerQueue = this.playerQueue;
+    if (playerQueue.length) {
+      playerQueue.forEach(player => {
+        const interstitial = player.interstitial;
+        const queuedIndex = schedule.findEventIndex(interstitial.identifier);
+        if (queuedIndex < index || queuedIndex > index + 1) {
+          this.clearInterstitial(interstitial, scheduledItem);
+        }
+      });
+    }
+    // Setup scheduled item
+    if (this.isInterstitial(scheduledItem)) {
+      this.timelinePos = Math.min(Math.max(this.timelinePos, scheduledItem.start), scheduledItem.end);
+      // Handle Interstitial
+      const interstitial = scheduledItem.event;
+      // find asset index
+      if (assetListIndex === undefined) {
+        assetListIndex = schedule.findAssetIndex(interstitial, this.timelinePos);
+        const assetIndexCandidate = getNextAssetIndex(interstitial, assetListIndex - 1);
+        if (interstitial.isAssetPastPlayoutLimit(assetIndexCandidate) || interstitial.appendInPlace && this.timelinePos === scheduledItem.end) {
+          this.advanceAfterAssetEnded(interstitial, index, assetListIndex);
+          return;
+        }
+        assetListIndex = assetIndexCandidate;
+      }
+      // Ensure Interstitial is enqueued
+      const waitingItem = this.waitingItem;
+      if (!this.assetsBuffered(scheduledItem, media)) {
+        this.setBufferingItem(scheduledItem);
+      }
+      let player = this.preloadAssets(interstitial, assetListIndex);
+      if (!this.eventItemsMatch(scheduledItem, waitingItem || currentItem)) {
+        this.waitingItem = scheduledItem;
+        this.log(`INTERSTITIAL_STARTED ${segmentToString(scheduledItem)} ${interstitial.appendInPlace ? 'append in place' : ''}`);
+        this.hls.trigger(Events.INTERSTITIAL_STARTED, {
+          event: interstitial,
+          schedule: scheduleItems.slice(0),
+          scheduleIndex: index
+        });
+      }
+      if (!interstitial.assetListLoaded) {
+        // Waiting at end of primary content segment
+        // Expect setSchedulePosition to be called again once ASSET-LIST is loaded
+        this.log(`Waiting for ASSET-LIST to complete loading ${interstitial}`);
+        return;
+      }
+      if (interstitial.assetListLoader) {
+        interstitial.assetListLoader.destroy();
+        interstitial.assetListLoader = undefined;
+      }
+      if (!media) {
+        this.log(`Waiting for attachMedia to start Interstitial ${interstitial}`);
+        return;
+      }
+      // Update schedule and asset list position now that it can start
+      this.waitingItem = this.endedItem = null;
+      this.playingItem = scheduledItem;
+
+      // If asset-list is empty or missing asset index, advance to next item
+      const assetItem = interstitial.assetList[assetListIndex];
+      if (!assetItem) {
+        this.advanceAfterAssetEnded(interstitial, index, assetListIndex || 0);
+        return;
+      }
+
+      // Start Interstitial Playback
+      if (!player) {
+        player = this.getAssetPlayer(assetItem.identifier);
+      }
+      if (player === null || player.destroyed) {
+        const assetListLength = interstitial.assetList.length;
+        this.warn(`asset ${assetListIndex + 1}/${assetListLength} player destroyed ${interstitial}`);
+        player = this.createAssetPlayer(interstitial, assetItem, assetListIndex);
+        player.loadSource();
+      }
+      if (!this.eventItemsMatch(scheduledItem, this.bufferingItem)) {
+        if (interstitial.appendInPlace && this.isAssetBuffered(assetItem)) {
+          return;
+        }
+      }
+      this.startAssetPlayer(player, assetListIndex, scheduleItems, index, media);
+      if (this.shouldPlay) {
+        playWithCatch(player.media);
+      }
+    } else if (scheduledItem) {
+      this.resumePrimary(scheduledItem, index, currentItem);
+      if (this.shouldPlay) {
+        playWithCatch(this.hls.media);
+      }
+    } else if (playedLastItem && this.isInterstitial(currentItem)) {
+      // Maintain playingItem state at end of schedule (setSchedulePosition(-1) called to end program)
+      // this allows onSeeking handler to update schedule position
+      this.endedItem = null;
+      this.playingItem = currentItem;
+      if (!currentItem.event.appendInPlace) {
+        // Media must be re-attached to resume primary schedule if not sharing source
+        this.attachPrimary(schedule.durations.primary, null);
+      }
+    }
+  }
+  get playbackDisabled() {
+    return this.hls.config.enableInterstitialPlayback === false;
+  }
+  get primaryDetails() {
+    var _this$mediaSelection;
+    return (_this$mediaSelection = this.mediaSelection) == null ? void 0 : _this$mediaSelection.main.details;
+  }
+  get primaryLive() {
+    var _this$primaryDetails;
+    return !!((_this$primaryDetails = this.primaryDetails) != null && _this$primaryDetails.live);
+  }
+  resumePrimary(scheduledItem, index, fromItem) {
+    var _this$detachedData4, _this$schedule4;
+    this.playingItem = scheduledItem;
+    this.playingAsset = this.endedAsset = null;
+    this.waitingItem = this.endedItem = null;
+    this.bufferedToItem(scheduledItem);
+    this.log(`resuming ${segmentToString(scheduledItem)}`);
+    if (!((_this$detachedData4 = this.detachedData) != null && _this$detachedData4.mediaSource)) {
+      let timelinePos = this.timelinePos;
+      if (timelinePos < scheduledItem.start || timelinePos >= scheduledItem.end) {
+        timelinePos = this.getPrimaryResumption(scheduledItem, index);
+        this.log(timelineMessage('resumePrimary', timelinePos));
+        this.timelinePos = timelinePos;
+      }
+      this.attachPrimary(timelinePos, scheduledItem);
+    }
+    if (!fromItem) {
+      return;
+    }
+    const scheduleItems = (_this$schedule4 = this.schedule) == null ? void 0 : _this$schedule4.items;
+    if (!scheduleItems) {
+      return;
+    }
+    this.log(`INTERSTITIALS_PRIMARY_RESUMED ${segmentToString(scheduledItem)}`);
+    this.hls.trigger(Events.INTERSTITIALS_PRIMARY_RESUMED, {
+      schedule: scheduleItems.slice(0),
+      scheduleIndex: index
+    });
+    this.checkBuffer();
+  }
+  getPrimaryResumption(scheduledItem, index) {
+    const itemStart = scheduledItem.start;
+    if (this.primaryLive) {
+      const details = this.primaryDetails;
+      if (index === 0) {
+        return this.hls.startPosition;
+      } else if (details && (itemStart < details.fragmentStart || itemStart > details.edge)) {
+        return this.hls.liveSyncPosition || -1;
+      }
+    }
+    return itemStart;
+  }
+  isAssetBuffered(asset) {
+    const player = this.getAssetPlayer(asset.identifier);
+    if (player != null && player.hls) {
+      return player.hls.bufferedToEnd;
+    }
+    const bufferInfo = BufferHelper.bufferInfo(this.primaryMedia, this.timelinePos, 0);
+    return bufferInfo.end + 1 >= asset.timelineStart + (asset.duration || 0);
+  }
+  attachPrimary(timelinePos, item, skipSeekToStartPosition) {
+    if (item) {
+      this.setBufferingItem(item);
+    } else {
+      this.bufferingItem = this.playingItem;
+    }
+    this.bufferingAsset = null;
+    const media = this.primaryMedia;
+    if (!media) {
+      return;
+    }
+    const hls = this.hls;
+    if (hls.media) {
+      this.checkBuffer();
+    } else {
+      this.transferMediaTo(hls, media);
+      if (skipSeekToStartPosition) {
+        this.startLoadingPrimaryAt(timelinePos, skipSeekToStartPosition);
+      }
+    }
+    if (!skipSeekToStartPosition) {
+      // Set primary position to resume time
+      this.log(timelineMessage('attachPrimary', timelinePos));
+      this.timelinePos = timelinePos;
+      this.startLoadingPrimaryAt(timelinePos, skipSeekToStartPosition);
+    }
+  }
+  startLoadingPrimaryAt(timelinePos, skipSeekToStartPosition) {
+    var _hls$mainForwardBuffe;
+    const hls = this.hls;
+    if (!hls.loadingEnabled || !hls.media || Math.abs((((_hls$mainForwardBuffe = hls.mainForwardBufferInfo) == null ? void 0 : _hls$mainForwardBuffe.start) || hls.media.currentTime) - timelinePos) > 0.5) {
+      hls.startLoad(timelinePos, skipSeekToStartPosition);
+    } else if (!hls.bufferingEnabled) {
+      hls.resumeBuffering();
+    }
+  }
+
+  // HLS.js event callbacks
+  onManifestLoading() {
+    var _this$schedule5;
+    this.stopLoad();
+    (_this$schedule5 = this.schedule) == null || _this$schedule5.reset();
+    this.emptyPlayerQueue();
+    this.clearScheduleState();
+    this.shouldPlay = false;
+    this.bufferedPos = this.timelinePos = -1;
+    this.mediaSelection = this.altSelection = this.manager = this.requiredTracks = null;
+    // BUFFER_CODECS listener added here for buffer-controller to handle it first where it adds tracks
+    this.hls.off(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+    this.hls.on(Events.BUFFER_CODECS, this.onBufferCodecs, this);
+  }
+  onLevelUpdated(event, data) {
+    if (data.level === -1 || !this.schedule) {
+      // level was removed
+      return;
+    }
+    const main = this.hls.levels[data.level];
+    if (!main.details) {
+      return;
+    }
+    const currentSelection = _objectSpread2(_objectSpread2({}, this.mediaSelection || this.altSelection), {}, {
+      main
+    });
+    this.mediaSelection = currentSelection;
+    this.schedule.parseInterstitialDateRanges(currentSelection, this.hls.config.interstitialAppendInPlace);
+    if (!this.effectivePlayingItem && this.schedule.items) {
+      this.checkStart();
+    }
+  }
+  onAudioTrackUpdated(event, data) {
+    const audio = this.hls.audioTracks[data.id];
+    const previousSelection = this.mediaSelection;
+    if (!previousSelection) {
+      this.altSelection = _objectSpread2(_objectSpread2({}, this.altSelection), {}, {
+        audio
+      });
+      return;
+    }
+    const currentSelection = _objectSpread2(_objectSpread2({}, previousSelection), {}, {
+      audio
+    });
+    this.mediaSelection = currentSelection;
+  }
+  onSubtitleTrackUpdated(event, data) {
+    const subtitles = this.hls.subtitleTracks[data.id];
+    const previousSelection = this.mediaSelection;
+    if (!previousSelection) {
+      this.altSelection = _objectSpread2(_objectSpread2({}, this.altSelection), {}, {
+        subtitles
+      });
+      return;
+    }
+    const currentSelection = _objectSpread2(_objectSpread2({}, previousSelection), {}, {
+      subtitles
+    });
+    this.mediaSelection = currentSelection;
+  }
+  onAudioTrackSwitching(event, data) {
+    const audioOption = getBasicSelectionOption(data);
+    this.playerQueue.forEach(({
+      hls
+    }) => hls && (hls.setAudioOption(data) || hls.setAudioOption(audioOption)));
+  }
+  onSubtitleTrackSwitch(event, data) {
+    const subtitleOption = getBasicSelectionOption(data);
+    this.playerQueue.forEach(({
+      hls
+    }) => hls && (hls.setSubtitleOption(data) || data.id !== -1 && hls.setSubtitleOption(subtitleOption)));
+  }
+  onBufferCodecs(event, data) {
+    const requiredTracks = data.tracks;
+    if (requiredTracks) {
+      this.requiredTracks = requiredTracks;
+    }
+  }
+  onBufferAppended(event, data) {
+    this.checkBuffer();
+  }
+  onBufferFlushed(event, data) {
+    const playingItem = this.playingItem;
+    if (playingItem && !this.itemsMatch(playingItem, this.bufferingItem) && !this.isInterstitial(playingItem)) {
+      const timelinePos = this.timelinePos;
+      this.bufferedPos = timelinePos;
+      this.checkBuffer();
+    }
+  }
+  onBufferedToEnd(event) {
+    if (!this.schedule) {
+      return;
+    }
+    // Buffered to post-roll
+    const interstitialEvents = this.schedule.events;
+    if (this.bufferedPos < Number.MAX_VALUE && interstitialEvents) {
+      for (let i = 0; i < interstitialEvents.length; i++) {
+        const interstitial = interstitialEvents[i];
+        if (interstitial.cue.post) {
+          var _this$schedule$items2;
+          const scheduleIndex = this.schedule.findEventIndex(interstitial.identifier);
+          const item = (_this$schedule$items2 = this.schedule.items) == null ? void 0 : _this$schedule$items2[scheduleIndex];
+          if (this.isInterstitial(item) && this.eventItemsMatch(item, this.bufferingItem)) {
+            this.bufferedToItem(item, 0);
+          }
+          break;
+        }
+      }
+      this.bufferedPos = Number.MAX_VALUE;
+    }
+  }
+  onMediaEnded(event) {
+    const playingItem = this.playingItem;
+    if (!this.playingLastItem && playingItem) {
+      const playingIndex = this.findItemIndex(playingItem);
+      this.setSchedulePosition(playingIndex + 1);
+    } else {
+      this.shouldPlay = false;
+    }
+  }
+  updateItem(previousItem, time) {
+    var _this$schedule6;
+    // find item in this.schedule.items;
+    const items = (_this$schedule6 = this.schedule) == null ? void 0 : _this$schedule6.items;
+    if (previousItem && items) {
+      const index = this.findItemIndex(previousItem, time);
+      return items[index] || null;
+    }
+    return null;
+  }
+  trimInPlace(updatedItem, itemBeforeUpdate) {
+    if (this.isInterstitial(updatedItem) && updatedItem.event.appendInPlace && itemBeforeUpdate.end - updatedItem.end > 0.25) {
+      updatedItem.event.assetList.forEach((asset, index) => {
+        if (updatedItem.event.isAssetPastPlayoutLimit(index)) {
+          this.clearAssetPlayer(asset.identifier, null);
+        }
+      });
+      const flushStart = updatedItem.end + 0.25;
+      const bufferInfo = BufferHelper.bufferInfo(this.primaryMedia, flushStart, 0);
+      if (bufferInfo.end > flushStart || (bufferInfo.nextStart || 0) > flushStart) {
+        this.log(`trim buffered interstitial ${segmentToString(updatedItem)} (was ${segmentToString(itemBeforeUpdate)})`);
+        const skipSeekToStartPosition = true;
+        this.attachPrimary(flushStart, null, skipSeekToStartPosition);
+        this.flushFrontBuffer(flushStart);
+      }
+    }
+  }
+  itemsMatch(a, b) {
+    return !!b && (a === b || a.event && b.event && this.eventItemsMatch(a, b) || !a.event && !b.event && this.findItemIndex(a) === this.findItemIndex(b));
+  }
+  eventItemsMatch(a, b) {
+    var _b$event;
+    return !!b && (a === b || a.event.identifier === ((_b$event = b.event) == null ? void 0 : _b$event.identifier));
+  }
+  findItemIndex(item, time) {
+    return item && this.schedule ? this.schedule.findItemIndex(item, time) : -1;
+  }
+  updateSchedule(forceUpdate = false) {
+    var _this$schedule7;
+    const mediaSelection = this.mediaSelection;
+    if (!mediaSelection) {
+      return;
+    }
+    (_this$schedule7 = this.schedule) == null || _this$schedule7.updateSchedule(mediaSelection, [], forceUpdate);
+  }
+
+  // Schedule buffer control
+  checkBuffer(starved) {
+    var _this$schedule8;
+    const items = (_this$schedule8 = this.schedule) == null ? void 0 : _this$schedule8.items;
+    if (!items) {
+      return;
+    }
+    // Find when combined forward buffer change reaches next schedule segment
+    const bufferInfo = BufferHelper.bufferInfo(this.primaryMedia, this.timelinePos, 0);
+    if (starved) {
+      this.bufferedPos = this.timelinePos;
+    }
+    starved || (starved = bufferInfo.len < 1);
+    this.updateBufferedPos(bufferInfo.end, items, starved);
+  }
+  updateBufferedPos(bufferEnd, items, bufferIsEmpty) {
+    const schedule = this.schedule;
+    const bufferingItem = this.bufferingItem;
+    if (this.bufferedPos > bufferEnd || !schedule) {
+      return;
+    }
+    if (items.length === 1 && this.itemsMatch(items[0], bufferingItem)) {
+      this.bufferedPos = bufferEnd;
+      return;
+    }
+    const playingItem = this.playingItem;
+    const playingIndex = this.findItemIndex(playingItem);
+    let bufferEndIndex = schedule.findItemIndexAtTime(bufferEnd);
+    if (this.bufferedPos < bufferEnd) {
+      var _nextItemToBuffer$eve;
+      const bufferingIndex = this.findItemIndex(bufferingItem);
+      const nextToBufferIndex = Math.min(bufferingIndex + 1, items.length - 1);
+      const nextItemToBuffer = items[nextToBufferIndex];
+      if (bufferEndIndex === -1 && bufferingItem && bufferEnd >= bufferingItem.end || (_nextItemToBuffer$eve = nextItemToBuffer.event) != null && _nextItemToBuffer$eve.appendInPlace && bufferEnd + 0.01 >= nextItemToBuffer.start) {
+        bufferEndIndex = nextToBufferIndex;
+      }
+      if (this.isInterstitial(bufferingItem)) {
+        const interstitial = bufferingItem.event;
+        if (nextToBufferIndex - playingIndex > 1 && interstitial.appendInPlace === false) {
+          // do not advance buffering item past Interstitial that requires source reset
+          return;
+        }
+        if (interstitial.assetList.length === 0 && interstitial.assetListLoader) {
+          // do not advance buffering item past Interstitial loading asset-list
+          return;
+        }
+      }
+      this.bufferedPos = bufferEnd;
+      if (bufferEndIndex > bufferingIndex && bufferEndIndex > playingIndex) {
+        this.bufferedToItem(nextItemToBuffer);
+      } else {
+        // allow more time than distance from edge for assets to load
+        const details = this.primaryDetails;
+        if (this.primaryLive && details && bufferEnd > details.edge - details.targetduration && nextItemToBuffer.start < details.edge + this.hls.config.interstitialLiveLookAhead && this.isInterstitial(nextItemToBuffer)) {
+          this.preloadAssets(nextItemToBuffer.event, 0);
+        }
+      }
+    } else if (bufferIsEmpty && playingItem && !this.itemsMatch(playingItem, bufferingItem)) {
+      if (bufferEndIndex === playingIndex) {
+        this.bufferedToItem(playingItem);
+      } else if (bufferEndIndex === playingIndex + 1) {
+        this.bufferedToItem(items[bufferEndIndex]);
+      }
+    }
+  }
+  assetsBuffered(item, media) {
+    const assetList = item.event.assetList;
+    if (assetList.length === 0) {
+      return false;
+    }
+    return !item.event.assetList.some(asset => {
+      const player = this.getAssetPlayer(asset.identifier);
+      return !(player != null && player.bufferedInPlaceToEnd(media));
+    });
+  }
+  setBufferingItem(item) {
+    const bufferingLast = this.bufferingItem;
+    const schedule = this.schedule;
+    if (!this.itemsMatch(item, bufferingLast) && schedule) {
+      const {
+        items,
+        events
+      } = schedule;
+      if (!items || !events) {
+        return bufferingLast;
+      }
+      const isInterstitial = this.isInterstitial(item);
+      const bufferingPlayer = this.getBufferingPlayer();
+      this.bufferingItem = item;
+      this.bufferedPos = Math.max(item.start, Math.min(item.end, this.timelinePos));
+      const timeRemaining = bufferingPlayer ? bufferingPlayer.remaining : bufferingLast ? bufferingLast.end - this.timelinePos : 0;
+      this.log(`INTERSTITIALS_BUFFERED_TO_BOUNDARY ${segmentToString(item)}` + (bufferingLast ? ` (${timeRemaining.toFixed(2)} remaining)` : ''));
+      if (!this.playbackDisabled) {
+        if (isInterstitial) {
+          const bufferIndex = schedule.findAssetIndex(item.event, this.bufferedPos);
+          // primary fragment loading will exit early in base-stream-controller while `bufferingItem` is set to an Interstitial block
+          item.event.assetList.forEach((asset, i) => {
+            const player = this.getAssetPlayer(asset.identifier);
+            if (player) {
+              if (i === bufferIndex) {
+                player.loadSource();
+              }
+              player.resumeBuffering();
+            }
+          });
+        } else {
+          this.hls.resumeBuffering();
+          this.playerQueue.forEach(player => player.pauseBuffering());
+        }
+      }
+      this.hls.trigger(Events.INTERSTITIALS_BUFFERED_TO_BOUNDARY, {
+        events: events.slice(0),
+        schedule: items.slice(0),
+        bufferingIndex: this.findItemIndex(item),
+        playingIndex: this.findItemIndex(this.playingItem)
+      });
+    } else if (this.bufferingItem !== item) {
+      this.bufferingItem = item;
+    }
+    return bufferingLast;
+  }
+  bufferedToItem(item, assetListIndex = 0) {
+    const bufferingLast = this.setBufferingItem(item);
+    if (this.playbackDisabled) {
+      return;
+    }
+    if (this.isInterstitial(item)) {
+      // Ensure asset list is loaded
+      this.bufferedToEvent(item, assetListIndex);
+    } else if (bufferingLast !== null) {
+      // If primary player is detached, it is also stopped, restart loading at primary position
+      this.bufferingAsset = null;
+      const detachedData = this.detachedData;
+      if (detachedData) {
+        if (detachedData.mediaSource) {
+          const skipSeekToStartPosition = true;
+          this.attachPrimary(item.start, item, skipSeekToStartPosition);
+        } else {
+          this.preloadPrimary(item);
+        }
+      } else {
+        // If not detached seek to resumption point
+        this.preloadPrimary(item);
+      }
+    }
+  }
+  preloadPrimary(item) {
+    const index = this.findItemIndex(item);
+    const timelinePos = this.getPrimaryResumption(item, index);
+    this.startLoadingPrimaryAt(timelinePos);
+  }
+  bufferedToEvent(item, assetListIndex) {
+    const interstitial = item.event;
+    const neverLoaded = interstitial.assetList.length === 0 && !interstitial.assetListLoader;
+    const playOnce = interstitial.cue.once;
+    if (neverLoaded || !playOnce) {
+      // Buffered to Interstitial boundary
+      const player = this.preloadAssets(interstitial, assetListIndex);
+      if (player != null && player.interstitial.appendInPlace) {
+        const media = this.primaryMedia;
+        if (media) {
+          this.bufferAssetPlayer(player, media);
+        }
+      }
+    }
+  }
+  preloadAssets(interstitial, assetListIndex) {
+    const uri = interstitial.assetUrl;
+    const assetListLength = interstitial.assetList.length;
+    const neverLoaded = assetListLength === 0 && !interstitial.assetListLoader;
+    const playOnce = interstitial.cue.once;
+    if (neverLoaded) {
+      const timelineStart = interstitial.timelineStart;
+      if (interstitial.appendInPlace) {
+        var _playingItem$nextEven;
+        const playingItem = this.playingItem;
+        if (!this.isInterstitial(playingItem) && (playingItem == null || (_playingItem$nextEven = playingItem.nextEvent) == null ? void 0 : _playingItem$nextEven.identifier) === interstitial.identifier) {
+          this.flushFrontBuffer(timelineStart + 0.25);
+        }
+      }
+      let hlsStartOffset;
+      let liveStartPosition = 0;
+      if (!this.playingItem && this.primaryLive) {
+        liveStartPosition = this.hls.startPosition;
+        if (liveStartPosition === -1) {
+          liveStartPosition = this.hls.liveSyncPosition || 0;
+        }
+      }
+      if (liveStartPosition && !(interstitial.cue.pre || interstitial.cue.post)) {
+        const startOffset = liveStartPosition - timelineStart;
+        if (startOffset > 0) {
+          hlsStartOffset = Math.round(startOffset * 1000) / 1000;
+        }
+      }
+      this.log(`Load interstitial asset ${assetListIndex + 1}/${uri ? 1 : assetListLength} ${interstitial}${hlsStartOffset ? ` live-start: ${liveStartPosition} start-offset: ${hlsStartOffset}` : ''}`);
+      if (uri) {
+        return this.createAsset(interstitial, 0, 0, timelineStart, interstitial.duration, uri);
+      }
+      const assetListLoader = this.assetListLoader.loadAssetList(interstitial, hlsStartOffset);
+      if (assetListLoader) {
+        interstitial.assetListLoader = assetListLoader;
+      }
+    } else if (!playOnce && assetListLength) {
+      // Re-buffered to Interstitial boundary, re-create asset player(s)
+      for (let i = assetListIndex; i < assetListLength; i++) {
+        const _asset = interstitial.assetList[i];
+        const playerIndex = this.getAssetPlayerQueueIndex(_asset.identifier);
+        if ((playerIndex === -1 || this.playerQueue[playerIndex].destroyed) && !_asset.error) {
+          this.createAssetPlayer(interstitial, _asset, i);
+        }
+      }
+      const asset = interstitial.assetList[assetListIndex];
+      // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+      if (asset) {
+        const player = this.getAssetPlayer(asset.identifier);
+        if (player) {
+          player.loadSource();
+        }
+        return player;
+      }
+    }
+    return null;
+  }
+  flushFrontBuffer(startOffset) {
+    // Force queued flushing of all buffers
+    const requiredTracks = this.requiredTracks;
+    if (!requiredTracks) {
+      return;
+    }
+    this.log(`Removing front buffer starting at ${startOffset}`);
+    const sourceBufferNames = Object.keys(requiredTracks);
+    sourceBufferNames.forEach(type => {
+      this.hls.trigger(Events.BUFFER_FLUSHING, {
+        startOffset,
+        endOffset: Infinity,
+        type
+      });
+    });
+  }
+
+  // Interstitial Asset Player control
+  getAssetPlayerQueueIndex(assetId) {
+    const playerQueue = this.playerQueue;
+    for (let i = 0; i < playerQueue.length; i++) {
+      if (assetId === playerQueue[i].assetId) {
+        return i;
+      }
+    }
+    return -1;
+  }
+  getAssetPlayer(assetId) {
+    const index = this.getAssetPlayerQueueIndex(assetId);
+    return this.playerQueue[index] || null;
+  }
+  getBufferingPlayer() {
+    const {
+      playerQueue,
+      primaryMedia
+    } = this;
+    if (primaryMedia) {
+      for (let i = 0; i < playerQueue.length; i++) {
+        if (playerQueue[i].media === primaryMedia) {
+          return playerQueue[i];
+        }
+      }
+    }
+    return null;
+  }
+  createAsset(interstitial, assetListIndex, startOffset, timelineStart, duration, uri) {
+    const assetItem = {
+      parentIdentifier: interstitial.identifier,
+      identifier: generateAssetIdentifier(interstitial, uri, assetListIndex),
+      duration,
+      startOffset,
+      timelineStart,
+      uri
+    };
+    return this.createAssetPlayer(interstitial, assetItem, assetListIndex);
+  }
+  createAssetPlayer(interstitial, assetItem, assetListIndex) {
+    const primary = this.hls;
+    const userConfig = primary.userConfig;
+    let videoPreference = userConfig.videoPreference;
+    const currentLevel = primary.loadLevelObj || primary.levels[primary.currentLevel];
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    if (videoPreference || currentLevel) {
+      videoPreference = _extends({}, videoPreference);
+      if (currentLevel.videoCodec) {
+        videoPreference.videoCodec = currentLevel.videoCodec;
+      }
+      // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+      if (currentLevel.videoRange) {
+        videoPreference.allowedVideoRanges = [currentLevel.videoRange];
+      }
+    }
+    const selectedAudio = primary.audioTracks[primary.audioTrack];
+    const selectedSubtitle = primary.subtitleTracks[primary.subtitleTrack];
+    let startPosition = 0;
+    if (this.primaryLive || interstitial.appendInPlace) {
+      const timePastStart = this.timelinePos - assetItem.timelineStart;
+      if (timePastStart > 1) {
+        const duration = assetItem.duration;
+        if (duration && timePastStart < duration) {
+          startPosition = timePastStart;
+        }
+      }
+    }
+    const assetId = assetItem.identifier;
+    const playerConfig = _objectSpread2(_objectSpread2({}, userConfig), {}, {
+      maxMaxBufferLength: Math.min(180, primary.config.maxMaxBufferLength),
+      autoStartLoad: true,
+      startFragPrefetch: true,
+      primarySessionId: primary.sessionId,
+      assetPlayerId: assetId,
+      abrEwmaDefaultEstimate: primary.bandwidthEstimate,
+      interstitialsController: undefined,
+      startPosition,
+      liveDurationInfinity: false,
+      testBandwidth: false,
+      videoPreference,
+      audioPreference: selectedAudio || userConfig.audioPreference,
+      subtitlePreference: selectedSubtitle || userConfig.subtitlePreference
+    });
+    // TODO: limit maxMaxBufferLength in asset players to prevent QEE
+    if (interstitial.appendInPlace) {
+      interstitial.appendInPlaceStarted = true;
+      if (assetItem.timelineStart) {
+        playerConfig.timelineOffset = assetItem.timelineStart;
+      }
+    }
+    const cmcd = playerConfig.cmcd;
+    if (cmcd != null && cmcd.sessionId && cmcd.contentId) {
+      playerConfig.cmcd = _extends({}, cmcd, {
+        contentId: hash(assetItem.uri)
+      });
+    }
+    if (this.getAssetPlayer(assetId)) {
+      this.warn(`Duplicate date range identifier ${interstitial} and asset ${assetId}`);
+    }
+    const player = new HlsAssetPlayer(this.HlsPlayerClass, playerConfig, interstitial, assetItem);
+    this.playerQueue.push(player);
+    interstitial.assetList[assetListIndex] = assetItem;
+    // Listen for LevelDetails and PTS change to update duration
+    let initialDuration = true;
+    const updateAssetPlayerDetails = details => {
+      if (details.live) {
+        var _this$schedule9;
+        const error = new Error(`Interstitials MUST be VOD assets ${interstitial}`);
+        const errorData = {
+          fatal: true,
+          type: ErrorTypes.OTHER_ERROR,
+          details: ErrorDetails.INTERSTITIAL_ASSET_ITEM_ERROR,
+          error
+        };
+        const scheduleIndex = ((_this$schedule9 = this.schedule) == null ? void 0 : _this$schedule9.findEventIndex(interstitial.identifier)) || -1;
+        this.handleAssetItemError(errorData, interstitial, scheduleIndex, assetListIndex, error.message);
+        return;
+      }
+      // Get time at end of last fragment
+      const duration = details.edge - details.fragmentStart;
+      const currentAssetDuration = assetItem.duration;
+      if (initialDuration || currentAssetDuration === null || duration > currentAssetDuration) {
+        initialDuration = false;
+        this.log(`Interstitial asset "${assetId}" duration change ${currentAssetDuration} > ${duration}`);
+        assetItem.duration = duration;
+        // Update schedule with new event and asset duration
+        this.updateSchedule();
+      }
+    };
+    player.on(Events.LEVEL_UPDATED, (event, {
+      details
+    }) => updateAssetPlayerDetails(details));
+    player.on(Events.LEVEL_PTS_UPDATED, (event, {
+      details
+    }) => updateAssetPlayerDetails(details));
+    player.on(Events.EVENT_CUE_ENTER, () => this.onInterstitialCueEnter());
+    const onBufferCodecs = (event, data) => {
+      const inQueuPlayer = this.getAssetPlayer(assetId);
+      if (inQueuPlayer && data.tracks) {
+        inQueuPlayer.off(Events.BUFFER_CODECS, onBufferCodecs);
+        inQueuPlayer.tracks = data.tracks;
+        const media = this.primaryMedia;
+        if (this.bufferingAsset === inQueuPlayer.assetItem && media && !inQueuPlayer.media) {
+          this.bufferAssetPlayer(inQueuPlayer, media);
+        }
+      }
+    };
+    player.on(Events.BUFFER_CODECS, onBufferCodecs);
+    const bufferedToEnd = () => {
+      var _this$schedule$items3;
+      const inQueuPlayer = this.getAssetPlayer(assetId);
+      this.log(`buffered to end of asset ${inQueuPlayer}`);
+      if (!inQueuPlayer || !this.schedule) {
+        return;
+      }
+      // Preload at end of asset
+      const scheduleIndex = this.schedule.findEventIndex(interstitial.identifier);
+      const item = (_this$schedule$items3 = this.schedule.items) == null ? void 0 : _this$schedule$items3[scheduleIndex];
+      if (this.isInterstitial(item)) {
+        this.advanceAssetBuffering(item, assetItem);
+      }
+    };
+    player.on(Events.BUFFERED_TO_END, bufferedToEnd);
+    const endedWithAssetIndex = assetIndex => {
+      return () => {
+        const inQueuPlayer = this.getAssetPlayer(assetId);
+        if (!inQueuPlayer || !this.schedule) {
+          return;
+        }
+        this.shouldPlay = true;
+        const scheduleIndex = this.schedule.findEventIndex(interstitial.identifier);
+        this.advanceAfterAssetEnded(interstitial, scheduleIndex, assetIndex);
+      };
+    };
+    player.once(Events.MEDIA_ENDED, endedWithAssetIndex(assetListIndex));
+    player.once(Events.PLAYOUT_LIMIT_REACHED, endedWithAssetIndex(Infinity));
+    player.on(Events.ERROR, (event, data) => {
+      if (!this.schedule) {
+        return;
+      }
+      const inQueuPlayer = this.getAssetPlayer(assetId);
+      if (data.details === ErrorDetails.BUFFER_STALLED_ERROR) {
+        if (inQueuPlayer != null && inQueuPlayer.appendInPlace) {
+          this.handleInPlaceStall(interstitial);
+          return;
+        }
+        this.onTimeupdate();
+        this.checkBuffer(true);
+        return;
+      }
+      this.handleAssetItemError(data, interstitial, this.schedule.findEventIndex(interstitial.identifier), assetListIndex, `Asset player error ${data.error} ${interstitial}`);
+    });
+    player.on(Events.DESTROYING, () => {
+      const inQueuPlayer = this.getAssetPlayer(assetId);
+      if (!inQueuPlayer || !this.schedule) {
+        return;
+      }
+      const error = new Error(`Asset player destroyed unexpectedly ${assetId}`);
+      const errorData = {
+        fatal: true,
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.INTERSTITIAL_ASSET_ITEM_ERROR,
+        error
+      };
+      this.handleAssetItemError(errorData, interstitial, this.schedule.findEventIndex(interstitial.identifier), assetListIndex, error.message);
+    });
+    this.log(`INTERSTITIAL_ASSET_PLAYER_CREATED ${eventAssetToString(assetItem)}`);
+    this.hls.trigger(Events.INTERSTITIAL_ASSET_PLAYER_CREATED, {
+      asset: assetItem,
+      assetListIndex,
+      event: interstitial,
+      player
+    });
+    return player;
+  }
+  clearInterstitial(interstitial, toSegment) {
+    this.clearAssetPlayers(interstitial, toSegment);
+    // Remove asset list and resolved duration
+    interstitial.reset();
+  }
+  clearAssetPlayers(interstitial, toSegment) {
+    interstitial.assetList.forEach(asset => {
+      this.clearAssetPlayer(asset.identifier, toSegment);
+    });
+  }
+  resetAssetPlayer(assetId) {
+    // Reset asset player so that it's timeline can be adjusted without reloading the MVP
+    const playerIndex = this.getAssetPlayerQueueIndex(assetId);
+    if (playerIndex !== -1) {
+      this.log(`reset asset player "${assetId}" after error`);
+      const player = this.playerQueue[playerIndex];
+      this.transferMediaFromPlayer(player, null);
+      player.resetDetails();
+    }
+  }
+  clearAssetPlayer(assetId, toSegment) {
+    const playerIndex = this.getAssetPlayerQueueIndex(assetId);
+    if (playerIndex !== -1) {
+      const player = this.playerQueue[playerIndex];
+      this.log(`clear ${player} toSegment: ${toSegment ? segmentToString(toSegment) : toSegment}`);
+      this.transferMediaFromPlayer(player, toSegment);
+      this.playerQueue.splice(playerIndex, 1);
+      player.destroy();
+    }
+  }
+  emptyPlayerQueue() {
+    let player;
+    while (player = this.playerQueue.pop()) {
+      player.destroy();
+    }
+    this.playerQueue = [];
+  }
+  startAssetPlayer(player, assetListIndex, scheduleItems, scheduleIndex, media) {
+    const {
+      interstitial,
+      assetItem,
+      assetId
+    } = player;
+    const assetListLength = interstitial.assetList.length;
+    const playingAsset = this.playingAsset;
+    this.endedAsset = null;
+    this.playingAsset = assetItem;
+    if (!playingAsset || playingAsset.identifier !== assetId) {
+      if (playingAsset) {
+        // Exiting another Interstitial asset
+        this.clearAssetPlayer(playingAsset.identifier, scheduleItems[scheduleIndex]);
+        delete playingAsset.error;
+      }
+      this.log(`INTERSTITIAL_ASSET_STARTED ${assetListIndex + 1}/${assetListLength} ${eventAssetToString(assetItem)}`);
+      this.hls.trigger(Events.INTERSTITIAL_ASSET_STARTED, {
+        asset: assetItem,
+        assetListIndex,
+        event: interstitial,
+        schedule: scheduleItems.slice(0),
+        scheduleIndex,
+        player
+      });
+    }
+
+    // detach media and attach to interstitial player if it does not have another element attached
+    this.bufferAssetPlayer(player, media);
+  }
+  bufferAssetPlayer(player, media) {
+    var _this$schedule$items4, _this$detachedData5;
+    if (!this.schedule) {
+      return;
+    }
+    const {
+      interstitial,
+      assetItem
+    } = player;
+    const scheduleIndex = this.schedule.findEventIndex(interstitial.identifier);
+    const item = (_this$schedule$items4 = this.schedule.items) == null ? void 0 : _this$schedule$items4[scheduleIndex];
+    if (!item) {
+      return;
+    }
+    player.loadSource();
+    this.setBufferingItem(item);
+    this.bufferingAsset = assetItem;
+    const bufferingPlayer = this.getBufferingPlayer();
+    if (bufferingPlayer === player) {
+      return;
+    }
+    const appendInPlaceNext = interstitial.appendInPlace;
+    if (appendInPlaceNext && (bufferingPlayer == null ? void 0 : bufferingPlayer.interstitial.appendInPlace) === false) {
+      // Media is detached and not available to append in place
+      return;
+    }
+    const activeTracks = (bufferingPlayer == null ? void 0 : bufferingPlayer.tracks) || ((_this$detachedData5 = this.detachedData) == null ? void 0 : _this$detachedData5.tracks) || this.requiredTracks;
+    if (appendInPlaceNext && assetItem !== this.playingAsset) {
+      // Do not buffer another item if tracks are unknown or incompatible
+      if (!player.tracks) {
+        this.log(`Waiting for track info before buffering ${player}`);
+        return;
+      }
+      if (activeTracks && !isCompatibleTrackChange(activeTracks, player.tracks)) {
+        const error = new Error(`Asset ${eventAssetToString(assetItem)} SourceBuffer tracks ('${Object.keys(player.tracks)}') are not compatible with primary content tracks ('${Object.keys(activeTracks)}')`);
+        const errorData = {
+          fatal: true,
+          type: ErrorTypes.OTHER_ERROR,
+          details: ErrorDetails.INTERSTITIAL_ASSET_ITEM_ERROR,
+          error
+        };
+        const assetListIndex = interstitial.findAssetIndex(assetItem);
+        this.handleAssetItemError(errorData, interstitial, scheduleIndex, assetListIndex, error.message);
+        return;
+      }
+    }
+    this.transferMediaTo(player, media);
+  }
+  handleInPlaceStall(interstitial) {
+    const schedule = this.schedule;
+    const media = this.primaryMedia;
+    if (!schedule || !media) {
+      return;
+    }
+    const currentTime = media.currentTime;
+    const foundAssetIndex = schedule.findAssetIndex(interstitial, currentTime);
+    const stallingAsset = interstitial.assetList[foundAssetIndex];
+    if (stallingAsset) {
+      const player = this.getAssetPlayer(stallingAsset.identifier);
+      if (player) {
+        const assetCurrentTime = player.currentTime || currentTime - stallingAsset.timelineStart;
+        const distanceFromEnd = player.duration - assetCurrentTime;
+        this.warn(`Stalled at ${assetCurrentTime} of ${assetCurrentTime + distanceFromEnd} in ${player} ${interstitial} (media.currentTime: ${currentTime})`);
+        if (assetCurrentTime && (distanceFromEnd / media.playbackRate < 0.5 || player.bufferedInPlaceToEnd(media)) && player.hls) {
+          const scheduleIndex = schedule.findEventIndex(interstitial.identifier);
+          this.advanceAfterAssetEnded(interstitial, scheduleIndex, foundAssetIndex);
+        }
+      }
+    }
+  }
+  advanceInPlace(time) {
+    const media = this.primaryMedia;
+    if (media && media.currentTime < time) {
+      media.currentTime = time;
+    }
+  }
+  handleAssetItemError(data, interstitial, scheduleIndex, assetListIndex, errorMessage) {
+    if (data.details === ErrorDetails.BUFFER_STALLED_ERROR) {
+      return;
+    }
+    const assetItem = interstitial.assetList[assetListIndex] || null;
+    this.warn(`INTERSTITIAL_ASSET_ERROR ${assetItem ? eventAssetToString(assetItem) : assetItem} ${data.error}`);
+    if (!this.schedule) {
+      return;
+    }
+    const assetId = (assetItem == null ? void 0 : assetItem.identifier) || '';
+    const playerIndex = this.getAssetPlayerQueueIndex(assetId);
+    const player = this.playerQueue[playerIndex] || null;
+    const items = this.schedule.items;
+    const interstitialAssetError = _extends({}, data, {
+      fatal: false,
+      errorAction: createDoNothingErrorAction(true),
+      asset: assetItem,
+      assetListIndex,
+      event: interstitial,
+      schedule: items,
+      scheduleIndex,
+      player
+    });
+    this.hls.trigger(Events.INTERSTITIAL_ASSET_ERROR, interstitialAssetError);
+    if (!data.fatal) {
+      return;
+    }
+    const playingAsset = this.playingAsset;
+    const bufferingAsset = this.bufferingAsset;
+    const error = new Error(errorMessage);
+    if (assetItem) {
+      this.clearAssetPlayer(assetId, null);
+      assetItem.error = error;
+    }
+
+    // If all assets in interstitial fail, mark the interstitial with an error
+    if (!interstitial.assetList.some(asset => !asset.error)) {
+      interstitial.error = error;
+    } else {
+      // Reset level details and reload/parse media playlists to align with updated schedule
+      for (let i = assetListIndex; i < interstitial.assetList.length; i++) {
+        this.resetAssetPlayer(interstitial.assetList[i].identifier);
+      }
+    }
+    this.updateSchedule(true);
+    if (interstitial.error) {
+      this.primaryFallback(interstitial);
+    } else if (playingAsset && playingAsset.identifier === assetId) {
+      this.advanceAfterAssetEnded(interstitial, scheduleIndex, assetListIndex);
+    } else if (bufferingAsset && bufferingAsset.identifier === assetId && this.isInterstitial(this.bufferingItem)) {
+      this.advanceAssetBuffering(this.bufferingItem, bufferingAsset);
+    }
+  }
+  primaryFallback(interstitial) {
+    // Fallback to Primary by on current or future events by updating schedule to skip errored interstitials/assets
+    const flushStart = interstitial.timelineStart;
+    const playingItem = this.effectivePlayingItem;
+    let timelinePos = this.timelinePos;
+    // Update schedule now that interstitial/assets are flagged with `error` for fallback
+    if (playingItem) {
+      this.log(`Fallback to primary from event "${interstitial.identifier}" start: ${flushStart} pos: ${timelinePos} playing: ${segmentToString(playingItem)} error: ${interstitial.error}`);
+      if (timelinePos === -1) {
+        timelinePos = this.hls.startPosition;
+      }
+      const newPlayingItem = this.updateItem(playingItem, timelinePos);
+      if (this.itemsMatch(playingItem, newPlayingItem)) {
+        this.clearInterstitial(interstitial, null);
+      }
+      if (interstitial.appendInPlace) {
+        this.attachPrimary(flushStart, null);
+        this.flushFrontBuffer(flushStart);
+      }
+    } else if (timelinePos === -1) {
+      this.checkStart();
+      return;
+    }
+    if (!this.schedule) {
+      return;
+    }
+    const scheduleIndex = this.schedule.findItemIndexAtTime(timelinePos);
+    this.setSchedulePosition(scheduleIndex);
+  }
+
+  // Asset List loading
+  onAssetListLoaded(event, data) {
+    var _this$schedule0, _this$bufferingItem2;
+    const interstitial = data.event;
+    const interstitialId = interstitial.identifier;
+    const assets = data.assetListResponse.ASSETS;
+    if (!((_this$schedule0 = this.schedule) != null && _this$schedule0.hasEvent(interstitialId))) {
+      // Interstitial with id was removed
+      return;
+    }
+    const eventStart = interstitial.timelineStart;
+    const previousDuration = interstitial.duration;
+    let sumDuration = 0;
+    assets.forEach((asset, assetListIndex) => {
+      const duration = parseFloat(asset.DURATION);
+      this.createAsset(interstitial, assetListIndex, sumDuration, eventStart + sumDuration, duration, asset.URI);
+      sumDuration += duration;
+    });
+    interstitial.duration = sumDuration;
+    this.log(`Loaded asset-list with duration: ${sumDuration} (was: ${previousDuration}) ${interstitial}`);
+    const waitingItem = this.waitingItem;
+    const waitingForItem = (waitingItem == null ? void 0 : waitingItem.event.identifier) === interstitialId;
+
+    // Update schedule now that asset.DURATION(s) are parsed
+    this.updateSchedule();
+    const bufferingEvent = (_this$bufferingItem2 = this.bufferingItem) == null ? void 0 : _this$bufferingItem2.event;
+
+    // If buffer reached Interstitial, start buffering first asset
+    if (waitingForItem) {
+      var _this$schedule$items5;
+      // Advance schedule when waiting for asset list data to play
+      const scheduleIndex = this.schedule.findEventIndex(interstitialId);
+      const item = (_this$schedule$items5 = this.schedule.items) == null ? void 0 : _this$schedule$items5[scheduleIndex];
+      if (item) {
+        if (!this.playingItem && this.timelinePos > item.end) {
+          // Abandon if new duration is reduced enough to land playback in primary start
+          const index = this.schedule.findItemIndexAtTime(this.timelinePos);
+          if (index !== scheduleIndex) {
+            interstitial.error = new Error(`Interstitial ${assets.length ? 'no longer within playback range' : 'asset-list is empty'} ${this.timelinePos} ${interstitial}`);
+            this.log(interstitial.error.message);
+            this.updateSchedule(true);
+            this.primaryFallback(interstitial);
+            return;
+          }
+        }
+        this.setBufferingItem(item);
+      }
+      this.setSchedulePosition(scheduleIndex);
+    } else if ((bufferingEvent == null ? void 0 : bufferingEvent.identifier) === interstitialId) {
+      const assetItem = interstitial.assetList[0];
+      // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+      if (assetItem) {
+        const player = this.getAssetPlayer(assetItem.identifier);
+        if (bufferingEvent.appendInPlace) {
+          // If buffering (but not playback) has reached this item transfer media-source
+          const media = this.primaryMedia;
+          if (player && media) {
+            this.bufferAssetPlayer(player, media);
+          }
+        } else if (player) {
+          player.loadSource();
+        }
+      }
+    }
+  }
+  onError(event, data) {
+    if (!this.schedule) {
+      return;
+    }
+    switch (data.details) {
+      case ErrorDetails.ASSET_LIST_PARSING_ERROR:
+      case ErrorDetails.ASSET_LIST_LOAD_ERROR:
+      case ErrorDetails.ASSET_LIST_LOAD_TIMEOUT:
+        {
+          const interstitial = data.interstitial;
+          if (interstitial) {
+            this.updateSchedule(true);
+            this.primaryFallback(interstitial);
+          }
+          break;
+        }
+      case ErrorDetails.BUFFER_STALLED_ERROR:
+        {
+          const stallingItem = this.endedItem || this.waitingItem || this.playingItem;
+          if (this.isInterstitial(stallingItem) && stallingItem.event.appendInPlace) {
+            this.handleInPlaceStall(stallingItem.event);
+            return;
+          }
+          this.log(`Primary player stall @${this.timelinePos} bufferedPos: ${this.bufferedPos}`);
+          this.onTimeupdate();
+          this.checkBuffer(true);
+          break;
+        }
+    }
+  }
+}
+
+const TICK_INTERVAL$2 = 500; // how often to tick in ms
+
+class SubtitleStreamController extends BaseStreamController {
+  constructor(hls, fragmentTracker, keyLoader) {
+    super(hls, fragmentTracker, keyLoader, 'subtitle-stream-controller', PlaylistLevelType.SUBTITLE);
+    this.currentTrackId = -1;
+    this.tracksBuffered = [];
+    this.mainDetails = null;
+    this.registerListeners();
+  }
+  onHandlerDestroying() {
+    this.unregisterListeners();
+    super.onHandlerDestroying();
+    this.mainDetails = null;
+  }
+  registerListeners() {
+    super.registerListeners();
+    const {
+      hls
+    } = this;
+    hls.on(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.on(Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
+    hls.on(Events.SUBTITLE_TRACK_SWITCH, this.onSubtitleTrackSwitch, this);
+    hls.on(Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
+    hls.on(Events.SUBTITLE_FRAG_PROCESSED, this.onSubtitleFragProcessed, this);
+    hls.on(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+  }
+  unregisterListeners() {
+    super.unregisterListeners();
+    const {
+      hls
+    } = this;
+    hls.off(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.off(Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
+    hls.off(Events.SUBTITLE_TRACK_SWITCH, this.onSubtitleTrackSwitch, this);
+    hls.off(Events.SUBTITLE_TRACK_LOADED, this.onSubtitleTrackLoaded, this);
+    hls.off(Events.SUBTITLE_FRAG_PROCESSED, this.onSubtitleFragProcessed, this);
+    hls.off(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+  }
+  startLoad(startPosition, skipSeekToStartPosition) {
+    this.stopLoad();
+    this.state = State.IDLE;
+    this.setInterval(TICK_INTERVAL$2);
+    this.nextLoadPosition = this.lastCurrentTime = startPosition + this.timelineOffset;
+    this.startPosition = skipSeekToStartPosition ? -1 : startPosition;
+    this.tick();
+  }
+  onManifestLoading() {
+    super.onManifestLoading();
+    this.mainDetails = null;
+  }
+  onMediaDetaching(event, data) {
+    this.tracksBuffered = [];
+    super.onMediaDetaching(event, data);
+  }
+  onLevelLoaded(event, data) {
+    this.mainDetails = data.details;
+  }
+  onSubtitleFragProcessed(event, data) {
+    const {
+      frag,
+      success
+    } = data;
+    if (!this.fragContextChanged(frag)) {
+      if (isMediaFragment(frag)) {
+        this.fragPrevious = frag;
+      }
+      this.state = State.IDLE;
+    }
+    if (!success) {
+      return;
+    }
+    const buffered = this.tracksBuffered[this.currentTrackId];
+    if (!buffered) {
+      return;
+    }
+
+    // Create/update a buffered array matching the interface used by BufferHelper.bufferedInfo
+    // so we can re-use the logic used to detect how much has been buffered
+    let timeRange;
+    const fragStart = frag.start;
+    for (let i = 0; i < buffered.length; i++) {
+      if (fragStart >= buffered[i].start && fragStart <= buffered[i].end) {
+        timeRange = buffered[i];
+        break;
+      }
+    }
+    const fragEnd = frag.start + frag.duration;
+    if (timeRange) {
+      timeRange.end = fragEnd;
+    } else {
+      timeRange = {
+        start: fragStart,
+        end: fragEnd
+      };
+      buffered.push(timeRange);
+    }
+    this.fragmentTracker.fragBuffered(frag);
+    this.fragBufferedComplete(frag, null);
+    if (this.media) {
+      this.tick();
+    }
+  }
+  onBufferFlushing(event, data) {
+    const {
+      startOffset,
+      endOffset
+    } = data;
+    if (startOffset === 0 && endOffset !== Number.POSITIVE_INFINITY) {
+      const endOffsetSubtitles = endOffset - 1;
+      if (endOffsetSubtitles <= 0) {
+        return;
+      }
+      data.endOffsetSubtitles = Math.max(0, endOffsetSubtitles);
+      this.tracksBuffered.forEach(buffered => {
+        for (let i = 0; i < buffered.length;) {
+          if (buffered[i].end <= endOffsetSubtitles) {
+            buffered.shift();
+            continue;
+          } else if (buffered[i].start < endOffsetSubtitles) {
+            buffered[i].start = endOffsetSubtitles;
+          } else {
+            break;
+          }
+          i++;
+        }
+      });
+      this.fragmentTracker.removeFragmentsInRange(startOffset, endOffsetSubtitles, PlaylistLevelType.SUBTITLE);
+    }
+  }
+
+  // If something goes wrong, proceed to next frag, if we were processing one.
+  onError(event, data) {
+    const frag = data.frag;
+    if ((frag == null ? void 0 : frag.type) === PlaylistLevelType.SUBTITLE) {
+      if (data.details === ErrorDetails.FRAG_GAP) {
+        this.fragmentTracker.fragBuffered(frag, true);
+      }
+      if (this.fragCurrent) {
+        this.fragCurrent.abortRequests();
+      }
+      if (this.state !== State.STOPPED) {
+        this.state = State.IDLE;
+      }
+    }
+  }
+
+  // Got all new subtitle levels.
+  onSubtitleTracksUpdated(event, {
+    subtitleTracks
+  }) {
+    if (this.levels && subtitleOptionsIdentical(this.levels, subtitleTracks)) {
+      this.levels = subtitleTracks.map(mediaPlaylist => new Level(mediaPlaylist));
+      return;
+    }
+    this.tracksBuffered = [];
+    this.levels = subtitleTracks.map(mediaPlaylist => {
+      const level = new Level(mediaPlaylist);
+      this.tracksBuffered[level.id] = [];
+      return level;
+    });
+    this.fragmentTracker.removeFragmentsInRange(0, Number.POSITIVE_INFINITY, PlaylistLevelType.SUBTITLE);
+    this.fragPrevious = null;
+    this.mediaBuffer = null;
+  }
+  onSubtitleTrackSwitch(event, data) {
+    var _this$levels;
+    this.currentTrackId = data.id;
+    if (!((_this$levels = this.levels) != null && _this$levels.length) || this.currentTrackId === -1) {
+      this.clearInterval();
+      return;
+    }
+
+    // Check if track has the necessary details to load fragments
+    const currentTrack = this.levels[this.currentTrackId];
+    if (currentTrack != null && currentTrack.details) {
+      this.mediaBuffer = this.mediaBufferTimeRanges;
+    } else {
+      this.mediaBuffer = null;
+    }
+    if (currentTrack && this.state !== State.STOPPED) {
+      this.setInterval(TICK_INTERVAL$2);
+    }
+  }
+
+  // Got a new set of subtitle fragments.
+  onSubtitleTrackLoaded(event, data) {
+    var _track$details;
+    const {
+      currentTrackId,
+      levels
+    } = this;
+    const {
+      details: newDetails,
+      id: trackId
+    } = data;
+    if (!levels) {
+      this.warn(`Subtitle tracks were reset while loading level ${trackId}`);
+      return;
+    }
+    const track = levels[trackId];
+    if (trackId >= levels.length || !track) {
+      return;
+    }
+    this.log(`Subtitle track ${trackId} loaded [${newDetails.startSN},${newDetails.endSN}]${newDetails.lastPartSn ? `[part-${newDetails.lastPartSn}-${newDetails.lastPartIndex}]` : ''},duration:${newDetails.totalduration}`);
+    this.mediaBuffer = this.mediaBufferTimeRanges;
+    let sliding = 0;
+    if (newDetails.live || (_track$details = track.details) != null && _track$details.live) {
+      if (newDetails.deltaUpdateFailed) {
+        return;
+      }
+      const mainDetails = this.mainDetails;
+      if (!mainDetails) {
+        this.startFragRequested = false;
+        return;
+      }
+      const mainSlidingStartFragment = mainDetails.fragments[0];
+      if (!track.details) {
+        if (newDetails.hasProgramDateTime && mainDetails.hasProgramDateTime) {
+          alignMediaPlaylistByPDT(newDetails, mainDetails);
+          sliding = newDetails.fragmentStart;
+        } else if (mainSlidingStartFragment) {
+          // line up live playlist with main so that fragments in range are loaded
+          sliding = mainSlidingStartFragment.start;
+          addSliding(newDetails, sliding);
+        }
+      } else {
+        var _this$levelLastLoaded;
+        sliding = this.alignPlaylists(newDetails, track.details, (_this$levelLastLoaded = this.levelLastLoaded) == null ? void 0 : _this$levelLastLoaded.details);
+        if (sliding === 0 && mainSlidingStartFragment) {
+          // realign with main when there is no overlap with last refresh
+          sliding = mainSlidingStartFragment.start;
+          addSliding(newDetails, sliding);
+        }
+      }
+      // compute start position if we are aligned with the main playlist
+      if (mainDetails && !this.startFragRequested) {
+        this.setStartPosition(mainDetails, sliding);
+      }
+    }
+    track.details = newDetails;
+    this.levelLastLoaded = track;
+    if (trackId !== currentTrackId) {
+      return;
+    }
+    this.hls.trigger(Events.SUBTITLE_TRACK_UPDATED, {
+      details: newDetails,
+      id: trackId,
+      groupId: data.groupId
+    });
+
+    // trigger handler right now
+    this.tick();
+
+    // If playlist is misaligned because of bad PDT or drift, delete details to resync with main on reload
+    if (newDetails.live && !this.fragCurrent && this.media && this.state === State.IDLE) {
+      const foundFrag = findFragmentByPTS(null, newDetails.fragments, this.media.currentTime, 0);
+      if (!foundFrag) {
+        this.warn('Subtitle playlist not aligned with playback');
+        track.details = undefined;
+      }
+    }
+  }
+  _handleFragmentLoadComplete(fragLoadedData) {
+    const {
+      frag,
+      payload
+    } = fragLoadedData;
+    const decryptData = frag.decryptdata;
+    const hls = this.hls;
+    if (this.fragContextChanged(frag)) {
+      return;
+    }
+    // check to see if the payload needs to be decrypted
+    if (payload && payload.byteLength > 0 && decryptData != null && decryptData.key && decryptData.iv && isFullSegmentEncryption(decryptData.method)) {
+      const startTime = performance.now();
+      // decrypt the subtitles
+      this.decrypter.decrypt(new Uint8Array(payload), decryptData.key.buffer, decryptData.iv.buffer, getAesModeFromFullSegmentMethod(decryptData.method)).catch(err => {
+        hls.trigger(Events.ERROR, {
+          type: ErrorTypes.MEDIA_ERROR,
+          details: ErrorDetails.FRAG_DECRYPT_ERROR,
+          fatal: false,
+          error: err,
+          reason: err.message,
+          frag
+        });
+        throw err;
+      }).then(decryptedData => {
+        const endTime = performance.now();
+        hls.trigger(Events.FRAG_DECRYPTED, {
+          frag,
+          payload: decryptedData,
+          stats: {
+            tstart: startTime,
+            tdecrypt: endTime
+          }
+        });
+      }).catch(err => {
+        this.warn(`${err.name}: ${err.message}`);
+        this.state = State.IDLE;
+      });
+    }
+  }
+  doTick() {
+    if (!this.media) {
+      this.state = State.IDLE;
+      return;
+    }
+    if (this.state === State.IDLE) {
+      const {
+        currentTrackId,
+        levels
+      } = this;
+      const track = levels == null ? void 0 : levels[currentTrackId];
+      if (!track || !levels.length || !track.details) {
+        return;
+      }
+      if (this.waitForLive(track)) {
+        return;
+      }
+      const {
+        config
+      } = this;
+      const currentTime = this.getLoadPosition();
+      const bufferedInfo = BufferHelper.bufferedInfo(this.tracksBuffered[this.currentTrackId] || [], currentTime, config.maxBufferHole);
+      const {
+        end: targetBufferTime,
+        len: bufferLen
+      } = bufferedInfo;
+      const trackDetails = track.details;
+      const maxBufLen = this.hls.maxBufferLength + trackDetails.levelTargetDuration;
+      if (bufferLen > maxBufLen) {
+        return;
+      }
+      const fragments = trackDetails.fragments;
+      const fragLen = fragments.length;
+      const end = trackDetails.edge;
+      let foundFrag = null;
+      const fragPrevious = this.fragPrevious;
+      if (targetBufferTime < end) {
+        const tolerance = config.maxFragLookUpTolerance;
+        const lookupTolerance = targetBufferTime > end - tolerance ? 0 : tolerance;
+        foundFrag = findFragmentByPTS(fragPrevious, fragments, Math.max(fragments[0].start, targetBufferTime), lookupTolerance);
+        if (!foundFrag && fragPrevious && fragPrevious.start < fragments[0].start) {
+          foundFrag = fragments[0];
+        }
+      } else {
+        foundFrag = fragments[fragLen - 1];
+      }
+      foundFrag = this.filterReplacedPrimary(foundFrag, track.details);
+      if (!foundFrag) {
+        return;
+      }
+      // Load earlier fragment in same discontinuity to make up for misaligned playlists and cues that extend beyond end of segment
+      const curSNIdx = foundFrag.sn - trackDetails.startSN;
+      const prevFrag = fragments[curSNIdx - 1];
+      if (prevFrag && prevFrag.cc === foundFrag.cc && this.fragmentTracker.getState(prevFrag) === FragmentState.NOT_LOADED) {
+        foundFrag = prevFrag;
+      }
+      if (this.fragmentTracker.getState(foundFrag) === FragmentState.NOT_LOADED) {
+        // only load if fragment is not loaded
+        const fragToLoad = this.mapToInitFragWhenRequired(foundFrag);
+        if (fragToLoad) {
+          this.loadFragment(fragToLoad, track, targetBufferTime);
+        }
+      }
+    }
+  }
+  loadFragment(frag, level, targetBufferTime) {
+    if (!isMediaFragment(frag)) {
+      this._loadInitSegment(frag, level);
+    } else {
+      super.loadFragment(frag, level, targetBufferTime);
+    }
+  }
+  get mediaBufferTimeRanges() {
+    return new BufferableInstance(this.tracksBuffered[this.currentTrackId] || []);
+  }
+}
+class BufferableInstance {
+  constructor(timeranges) {
+    this.buffered = void 0;
+    const getRange = (name, index, length) => {
+      index = index >>> 0;
+      if (index > length - 1) {
+        throw new DOMException(`Failed to execute '${name}' on 'TimeRanges': The index provided (${index}) is greater than the maximum bound (${length})`);
+      }
+      return timeranges[index][name];
+    };
+    this.buffered = {
+      get length() {
+        return timeranges.length;
+      },
+      end(index) {
+        return getRange('end', index, timeranges.length);
+      },
+      start(index) {
+        return getRange('start', index, timeranges.length);
+      }
+    };
+  }
+}
+
+/**
+ *
+ * This code was ported from the dash.js project at:
+ *   https://github.com/Dash-Industry-Forum/dash.js/blob/development/externals/cea608-parser.js
+ *   https://github.com/Dash-Industry-Forum/dash.js/commit/8269b26a761e0853bb21d78780ed945144ecdd4d#diff-71bc295a2d6b6b7093a1d3290d53a4b2
+ *
+ * The original copyright appears below:
+ *
+ * The copyright in this software is being made available under the BSD License,
+ * included below. This software may be subject to other third party and contributor
+ * rights, including patent rights, and no such rights are granted under this license.
+ *
+ * Copyright (c) 2015-2016, DASH Industry Forum.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *  1. Redistributions of source code must retain the above copyright notice, this
+ *  list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *  this list of conditions and the following disclaimer in the documentation and/or
+ *  other materials provided with the distribution.
+ *  2. Neither the name of Dash Industry Forum nor the names of its
+ *  contributors may be used to endorse or promote products derived from this software
+ *  without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
+ *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ *  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ *  Exceptions from regular ASCII. CodePoints are mapped to UTF-16 codes
+ */
+
+const specialCea608CharsCodes = {
+  0x2a: 0xe1,
+  // lowercase a, acute accent
+  0x5c: 0xe9,
+  // lowercase e, acute accent
+  0x5e: 0xed,
+  // lowercase i, acute accent
+  0x5f: 0xf3,
+  // lowercase o, acute accent
+  0x60: 0xfa,
+  // lowercase u, acute accent
+  0x7b: 0xe7,
+  // lowercase c with cedilla
+  0x7c: 0xf7,
+  // division symbol
+  0x7d: 0xd1,
+  // uppercase N tilde
+  0x7e: 0xf1,
+  // lowercase n tilde
+  0x7f: 0x2588,
+  // Full block
+  // THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
+  // THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
+  // THIS MEANS THAT \x50 MUST BE ADDED TO THE VALUES
+  0x80: 0xae,
+  // Registered symbol (R)
+  0x81: 0xb0,
+  // degree sign
+  0x82: 0xbd,
+  // 1/2 symbol
+  0x83: 0xbf,
+  // Inverted (open) question mark
+  0x84: 0x2122,
+  // Trademark symbol (TM)
+  0x85: 0xa2,
+  // Cents symbol
+  0x86: 0xa3,
+  // Pounds sterling
+  0x87: 0x266a,
+  // Music 8'th note
+  0x88: 0xe0,
+  // lowercase a, grave accent
+  0x89: 0x20,
+  // transparent space (regular)
+  0x8a: 0xe8,
+  // lowercase e, grave accent
+  0x8b: 0xe2,
+  // lowercase a, circumflex accent
+  0x8c: 0xea,
+  // lowercase e, circumflex accent
+  0x8d: 0xee,
+  // lowercase i, circumflex accent
+  0x8e: 0xf4,
+  // lowercase o, circumflex accent
+  0x8f: 0xfb,
+  // lowercase u, circumflex accent
+  // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
+  // THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
+  0x90: 0xc1,
+  // capital letter A with acute
+  0x91: 0xc9,
+  // capital letter E with acute
+  0x92: 0xd3,
+  // capital letter O with acute
+  0x93: 0xda,
+  // capital letter U with acute
+  0x94: 0xdc,
+  // capital letter U with diaresis
+  0x95: 0xfc,
+  // lowercase letter U with diaeresis
+  0x96: 0x2018,
+  // opening single quote
+  0x97: 0xa1,
+  // inverted exclamation mark
+  0x98: 0x2a,
+  // asterisk
+  0x99: 0x2019,
+  // closing single quote
+  0x9a: 0x2501,
+  // box drawings heavy horizontal
+  0x9b: 0xa9,
+  // copyright sign
+  0x9c: 0x2120,
+  // Service mark
+  0x9d: 0x2022,
+  // (round) bullet
+  0x9e: 0x201c,
+  // Left double quotation mark
+  0x9f: 0x201d,
+  // Right double quotation mark
+  0xa0: 0xc0,
+  // uppercase A, grave accent
+  0xa1: 0xc2,
+  // uppercase A, circumflex
+  0xa2: 0xc7,
+  // uppercase C with cedilla
+  0xa3: 0xc8,
+  // uppercase E, grave accent
+  0xa4: 0xca,
+  // uppercase E, circumflex
+  0xa5: 0xcb,
+  // capital letter E with diaresis
+  0xa6: 0xeb,
+  // lowercase letter e with diaresis
+  0xa7: 0xce,
+  // uppercase I, circumflex
+  0xa8: 0xcf,
+  // uppercase I, with diaresis
+  0xa9: 0xef,
+  // lowercase i, with diaresis
+  0xaa: 0xd4,
+  // uppercase O, circumflex
+  0xab: 0xd9,
+  // uppercase U, grave accent
+  0xac: 0xf9,
+  // lowercase u, grave accent
+  0xad: 0xdb,
+  // uppercase U, circumflex
+  0xae: 0xab,
+  // left-pointing double angle quotation mark
+  0xaf: 0xbb,
+  // right-pointing double angle quotation mark
+  // THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
+  // THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
+  0xb0: 0xc3,
+  // Uppercase A, tilde
+  0xb1: 0xe3,
+  // Lowercase a, tilde
+  0xb2: 0xcd,
+  // Uppercase I, acute accent
+  0xb3: 0xcc,
+  // Uppercase I, grave accent
+  0xb4: 0xec,
+  // Lowercase i, grave accent
+  0xb5: 0xd2,
+  // Uppercase O, grave accent
+  0xb6: 0xf2,
+  // Lowercase o, grave accent
+  0xb7: 0xd5,
+  // Uppercase O, tilde
+  0xb8: 0xf5,
+  // Lowercase o, tilde
+  0xb9: 0x7b,
+  // Open curly brace
+  0xba: 0x7d,
+  // Closing curly brace
+  0xbb: 0x5c,
+  // Backslash
+  0xbc: 0x5e,
+  // Caret
+  0xbd: 0x5f,
+  // Underscore
+  0xbe: 0x7c,
+  // Pipe (vertical line)
+  0xbf: 0x223c,
+  // Tilde operator
+  0xc0: 0xc4,
+  // Uppercase A, umlaut
+  0xc1: 0xe4,
+  // Lowercase A, umlaut
+  0xc2: 0xd6,
+  // Uppercase O, umlaut
+  0xc3: 0xf6,
+  // Lowercase o, umlaut
+  0xc4: 0xdf,
+  // Esszett (sharp S)
+  0xc5: 0xa5,
+  // Yen symbol
+  0xc6: 0xa4,
+  // Generic currency sign
+  0xc7: 0x2503,
+  // Box drawings heavy vertical
+  0xc8: 0xc5,
+  // Uppercase A, ring
+  0xc9: 0xe5,
+  // Lowercase A, ring
+  0xca: 0xd8,
+  // Uppercase O, stroke
+  0xcb: 0xf8,
+  // Lowercase o, strok
+  0xcc: 0x250f,
+  // Box drawings heavy down and right
+  0xcd: 0x2513,
+  // Box drawings heavy down and left
+  0xce: 0x2517,
+  // Box drawings heavy up and right
+  0xcf: 0x251b // Box drawings heavy up and left
+};
+
+/**
+ * Utils
+ */
+const getCharForByte = byte => String.fromCharCode(specialCea608CharsCodes[byte] || byte);
+const NR_ROWS = 15;
+const NR_COLS = 100;
+// Tables to look up row from PAC data
+const rowsLowCh1 = {
+  0x11: 1,
+  0x12: 3,
+  0x15: 5,
+  0x16: 7,
+  0x17: 9,
+  0x10: 11,
+  0x13: 12,
+  0x14: 14
+};
+const rowsHighCh1 = {
+  0x11: 2,
+  0x12: 4,
+  0x15: 6,
+  0x16: 8,
+  0x17: 10,
+  0x13: 13,
+  0x14: 15
+};
+const rowsLowCh2 = {
+  0x19: 1,
+  0x1a: 3,
+  0x1d: 5,
+  0x1e: 7,
+  0x1f: 9,
+  0x18: 11,
+  0x1b: 12,
+  0x1c: 14
+};
+const rowsHighCh2 = {
+  0x19: 2,
+  0x1a: 4,
+  0x1d: 6,
+  0x1e: 8,
+  0x1f: 10,
+  0x1b: 13,
+  0x1c: 15
+};
+const backgroundColors = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta', 'black', 'transparent'];
+class CaptionsLogger {
+  constructor() {
+    this.time = null;
+    this.verboseLevel = 0;
+  }
+  log(severity, msg) {
+    if (this.verboseLevel >= severity) {
+      const m = typeof msg === 'function' ? msg() : msg;
+      logger.log(`${this.time} [${severity}] ${m}`);
+    }
+  }
+}
+const numArrayToHexArray = function numArrayToHexArray(numArray) {
+  const hexArray = [];
+  for (let j = 0; j < numArray.length; j++) {
+    hexArray.push(numArray[j].toString(16));
+  }
+  return hexArray;
+};
+class PenState {
+  constructor() {
+    this.foreground = 'white';
+    this.underline = false;
+    this.italics = false;
+    this.background = 'black';
+    this.flash = false;
+  }
+  reset() {
+    this.foreground = 'white';
+    this.underline = false;
+    this.italics = false;
+    this.background = 'black';
+    this.flash = false;
+  }
+  setStyles(styles) {
+    const attribs = ['foreground', 'underline', 'italics', 'background', 'flash'];
+    for (let i = 0; i < attribs.length; i++) {
+      const style = attribs[i];
+      if (styles.hasOwnProperty(style)) {
+        this[style] = styles[style];
+      }
+    }
+  }
+  isDefault() {
+    return this.foreground === 'white' && !this.underline && !this.italics && this.background === 'black' && !this.flash;
+  }
+  equals(other) {
+    return this.foreground === other.foreground && this.underline === other.underline && this.italics === other.italics && this.background === other.background && this.flash === other.flash;
+  }
+  copy(newPenState) {
+    this.foreground = newPenState.foreground;
+    this.underline = newPenState.underline;
+    this.italics = newPenState.italics;
+    this.background = newPenState.background;
+    this.flash = newPenState.flash;
+  }
+  toString() {
+    return 'color=' + this.foreground + ', underline=' + this.underline + ', italics=' + this.italics + ', background=' + this.background + ', flash=' + this.flash;
+  }
+}
+
+/**
+ * Unicode character with styling and background.
+ * @constructor
+ */
+class StyledUnicodeChar {
+  constructor() {
+    this.uchar = ' ';
+    this.penState = new PenState();
+  }
+  reset() {
+    this.uchar = ' ';
+    this.penState.reset();
+  }
+  setChar(uchar, newPenState) {
+    this.uchar = uchar;
+    this.penState.copy(newPenState);
+  }
+  setPenState(newPenState) {
+    this.penState.copy(newPenState);
+  }
+  equals(other) {
+    return this.uchar === other.uchar && this.penState.equals(other.penState);
+  }
+  copy(newChar) {
+    this.uchar = newChar.uchar;
+    this.penState.copy(newChar.penState);
+  }
+  isEmpty() {
+    return this.uchar === ' ' && this.penState.isDefault();
+  }
+}
+
+/**
+ * CEA-608 row consisting of NR_COLS instances of StyledUnicodeChar.
+ * @constructor
+ */
+class Row {
+  constructor(logger) {
+    this.chars = [];
+    this.pos = 0;
+    this.currPenState = new PenState();
+    this.cueStartTime = null;
+    this.logger = void 0;
+    for (let i = 0; i < NR_COLS; i++) {
+      this.chars.push(new StyledUnicodeChar());
+    }
+    this.logger = logger;
+  }
+  equals(other) {
+    for (let i = 0; i < NR_COLS; i++) {
+      if (!this.chars[i].equals(other.chars[i])) {
+        return false;
+      }
+    }
+    return true;
+  }
+  copy(other) {
+    for (let i = 0; i < NR_COLS; i++) {
+      this.chars[i].copy(other.chars[i]);
+    }
+  }
+  isEmpty() {
+    let empty = true;
+    for (let i = 0; i < NR_COLS; i++) {
+      if (!this.chars[i].isEmpty()) {
+        empty = false;
+        break;
+      }
+    }
+    return empty;
+  }
+
+  /**
+   *  Set the cursor to a valid column.
+   */
+  setCursor(absPos) {
+    if (this.pos !== absPos) {
+      this.pos = absPos;
+    }
+    if (this.pos < 0) {
+      this.logger.log(3, 'Negative cursor position ' + this.pos);
+      this.pos = 0;
+    } else if (this.pos > NR_COLS) {
+      this.logger.log(3, 'Too large cursor position ' + this.pos);
+      this.pos = NR_COLS;
+    }
+  }
+
+  /**
+   * Move the cursor relative to current position.
+   */
+  moveCursor(relPos) {
+    const newPos = this.pos + relPos;
+    if (relPos > 1) {
+      for (let i = this.pos + 1; i < newPos + 1; i++) {
+        this.chars[i].setPenState(this.currPenState);
+      }
+    }
+    this.setCursor(newPos);
+  }
+
+  /**
+   * Backspace, move one step back and clear character.
+   */
+  backSpace() {
+    this.moveCursor(-1);
+    this.chars[this.pos].setChar(' ', this.currPenState);
+  }
+  insertChar(byte) {
+    if (byte >= 0x90) {
+      // Extended char
+      this.backSpace();
+    }
+    const char = getCharForByte(byte);
+    if (this.pos >= NR_COLS) {
+      this.logger.log(0, () => 'Cannot insert ' + byte.toString(16) + ' (' + char + ') at position ' + this.pos + '. Skipping it!');
+      return;
+    }
+    this.chars[this.pos].setChar(char, this.currPenState);
+    this.moveCursor(1);
+  }
+  clearFromPos(startPos) {
+    let i;
+    for (i = startPos; i < NR_COLS; i++) {
+      this.chars[i].reset();
+    }
+  }
+  clear() {
+    this.clearFromPos(0);
+    this.pos = 0;
+    this.currPenState.reset();
+  }
+  clearToEndOfRow() {
+    this.clearFromPos(this.pos);
+  }
+  getTextString() {
+    const chars = [];
+    let empty = true;
+    for (let i = 0; i < NR_COLS; i++) {
+      const char = this.chars[i].uchar;
+      if (char !== ' ') {
+        empty = false;
+      }
+      chars.push(char);
+    }
+    if (empty) {
+      return '';
+    } else {
+      return chars.join('');
+    }
+  }
+  setPenStyles(styles) {
+    this.currPenState.setStyles(styles);
+    const currChar = this.chars[this.pos];
+    currChar.setPenState(this.currPenState);
+  }
+}
+
+/**
+ * Keep a CEA-608 screen of 32x15 styled characters
+ * @constructor
+ */
+class CaptionScreen {
+  constructor(logger) {
+    this.rows = [];
+    this.currRow = NR_ROWS - 1;
+    this.nrRollUpRows = null;
+    this.lastOutputScreen = null;
+    this.logger = void 0;
+    for (let i = 0; i < NR_ROWS; i++) {
+      this.rows.push(new Row(logger));
+    }
+    this.logger = logger;
+  }
+  reset() {
+    for (let i = 0; i < NR_ROWS; i++) {
+      this.rows[i].clear();
+    }
+    this.currRow = NR_ROWS - 1;
+  }
+  equals(other) {
+    let equal = true;
+    for (let i = 0; i < NR_ROWS; i++) {
+      if (!this.rows[i].equals(other.rows[i])) {
+        equal = false;
+        break;
+      }
+    }
+    return equal;
+  }
+  copy(other) {
+    for (let i = 0; i < NR_ROWS; i++) {
+      this.rows[i].copy(other.rows[i]);
+    }
+  }
+  isEmpty() {
+    let empty = true;
+    for (let i = 0; i < NR_ROWS; i++) {
+      if (!this.rows[i].isEmpty()) {
+        empty = false;
+        break;
+      }
+    }
+    return empty;
+  }
+  backSpace() {
+    const row = this.rows[this.currRow];
+    row.backSpace();
+  }
+  clearToEndOfRow() {
+    const row = this.rows[this.currRow];
+    row.clearToEndOfRow();
+  }
+
+  /**
+   * Insert a character (without styling) in the current row.
+   */
+  insertChar(char) {
+    const row = this.rows[this.currRow];
+    row.insertChar(char);
+  }
+  setPen(styles) {
+    const row = this.rows[this.currRow];
+    row.setPenStyles(styles);
+  }
+  moveCursor(relPos) {
+    const row = this.rows[this.currRow];
+    row.moveCursor(relPos);
+  }
+  setCursor(absPos) {
+    this.logger.log(2, 'setCursor: ' + absPos);
+    const row = this.rows[this.currRow];
+    row.setCursor(absPos);
+  }
+  setPAC(pacData) {
+    this.logger.log(2, () => 'pacData = ' + stringify(pacData));
+    let newRow = pacData.row - 1;
+    if (this.nrRollUpRows && newRow < this.nrRollUpRows - 1) {
+      newRow = this.nrRollUpRows - 1;
+    }
+
+    // Make sure this only affects Roll-up Captions by checking this.nrRollUpRows
+    if (this.nrRollUpRows && this.currRow !== newRow) {
+      // clear all rows first
+      for (let i = 0; i < NR_ROWS; i++) {
+        this.rows[i].clear();
+      }
+
+      // Copy this.nrRollUpRows rows from lastOutputScreen and place it in the newRow location
+      // topRowIndex - the start of rows to copy (inclusive index)
+      const topRowIndex = this.currRow + 1 - this.nrRollUpRows;
+      // We only copy if the last position was already shown.
+      // We use the cueStartTime value to check this.
+      const lastOutputScreen = this.lastOutputScreen;
+      if (lastOutputScreen) {
+        const prevLineTime = lastOutputScreen.rows[topRowIndex].cueStartTime;
+        const time = this.logger.time;
+        if (prevLineTime !== null && time !== null && prevLineTime < time) {
+          for (let i = 0; i < this.nrRollUpRows; i++) {
+            this.rows[newRow - this.nrRollUpRows + i + 1].copy(lastOutputScreen.rows[topRowIndex + i]);
+          }
+        }
+      }
+    }
+    this.currRow = newRow;
+    const row = this.rows[this.currRow];
+    if (pacData.indent !== null) {
+      const indent = pacData.indent;
+      const prevPos = Math.max(indent - 1, 0);
+      row.setCursor(pacData.indent);
+      pacData.color = row.chars[prevPos].penState.foreground;
+    }
+    const styles = {
+      foreground: pacData.color,
+      underline: pacData.underline,
+      italics: pacData.italics,
+      background: 'black',
+      flash: false
+    };
+    this.setPen(styles);
+  }
+
+  /**
+   * Set background/extra foreground, but first do back_space, and then insert space (backwards compatibility).
+   */
+  setBkgData(bkgData) {
+    this.logger.log(2, () => 'bkgData = ' + stringify(bkgData));
+    this.backSpace();
+    this.setPen(bkgData);
+    this.insertChar(0x20); // Space
+  }
+  setRollUpRows(nrRows) {
+    this.nrRollUpRows = nrRows;
+  }
+  rollUp() {
+    if (this.nrRollUpRows === null) {
+      this.logger.log(3, 'roll_up but nrRollUpRows not set yet');
+      return; // Not properly setup
+    }
+    this.logger.log(1, () => this.getDisplayText());
+    const topRowIndex = this.currRow + 1 - this.nrRollUpRows;
+    const topRow = this.rows.splice(topRowIndex, 1)[0];
+    topRow.clear();
+    this.rows.splice(this.currRow, 0, topRow);
+    this.logger.log(2, 'Rolling up');
+    // this.logger.log(VerboseLevel.TEXT, this.get_display_text())
+  }
+
+  /**
+   * Get all non-empty rows with as unicode text.
+   */
+  getDisplayText(asOneRow) {
+    asOneRow = asOneRow || false;
+    const displayText = [];
+    let text = '';
+    let rowNr = -1;
+    for (let i = 0; i < NR_ROWS; i++) {
+      const rowText = this.rows[i].getTextString();
+      if (rowText) {
+        rowNr = i + 1;
+        if (asOneRow) {
+          displayText.push('Row ' + rowNr + ": '" + rowText + "'");
+        } else {
+          displayText.push(rowText.trim());
+        }
+      }
+    }
+    if (displayText.length > 0) {
+      if (asOneRow) {
+        text = '[' + displayText.join(' | ') + ']';
+      } else {
+        text = displayText.join('\n');
+      }
+    }
+    return text;
+  }
+  getTextAndFormat() {
+    return this.rows;
+  }
+}
+
+// var modes = ['MODE_ROLL-UP', 'MODE_POP-ON', 'MODE_PAINT-ON', 'MODE_TEXT'];
+
+class Cea608Channel {
+  constructor(channelNumber, outputFilter, logger) {
+    this.chNr = void 0;
+    this.outputFilter = void 0;
+    this.mode = void 0;
+    this.verbose = void 0;
+    this.displayedMemory = void 0;
+    this.nonDisplayedMemory = void 0;
+    this.lastOutputScreen = void 0;
+    this.currRollUpRow = void 0;
+    this.writeScreen = void 0;
+    this.cueStartTime = void 0;
+    this.logger = void 0;
+    this.chNr = channelNumber;
+    this.outputFilter = outputFilter;
+    this.mode = null;
+    this.verbose = 0;
+    this.displayedMemory = new CaptionScreen(logger);
+    this.nonDisplayedMemory = new CaptionScreen(logger);
+    this.lastOutputScreen = new CaptionScreen(logger);
+    this.currRollUpRow = this.displayedMemory.rows[NR_ROWS - 1];
+    this.writeScreen = this.displayedMemory;
+    this.mode = null;
+    this.cueStartTime = null; // Keeps track of where a cue started.
+    this.logger = logger;
+  }
+  reset() {
+    this.mode = null;
+    this.displayedMemory.reset();
+    this.nonDisplayedMemory.reset();
+    this.lastOutputScreen.reset();
+    this.outputFilter.reset();
+    this.currRollUpRow = this.displayedMemory.rows[NR_ROWS - 1];
+    this.writeScreen = this.displayedMemory;
+    this.mode = null;
+    this.cueStartTime = null;
+  }
+  getHandler() {
+    return this.outputFilter;
+  }
+  setHandler(newHandler) {
+    this.outputFilter = newHandler;
+  }
+  setPAC(pacData) {
+    this.writeScreen.setPAC(pacData);
+  }
+  setBkgData(bkgData) {
+    this.writeScreen.setBkgData(bkgData);
+  }
+  setMode(newMode) {
+    if (newMode === this.mode) {
+      return;
+    }
+    this.mode = newMode;
+    this.logger.log(2, () => 'MODE=' + newMode);
+    if (this.mode === 'MODE_POP-ON') {
+      this.writeScreen = this.nonDisplayedMemory;
+    } else {
+      this.writeScreen = this.displayedMemory;
+      this.writeScreen.reset();
+    }
+    if (this.mode !== 'MODE_ROLL-UP') {
+      this.displayedMemory.nrRollUpRows = null;
+      this.nonDisplayedMemory.nrRollUpRows = null;
+    }
+    this.mode = newMode;
+  }
+  insertChars(chars) {
+    for (let i = 0; i < chars.length; i++) {
+      this.writeScreen.insertChar(chars[i]);
+    }
+    const screen = this.writeScreen === this.displayedMemory ? 'DISP' : 'NON_DISP';
+    this.logger.log(2, () => screen + ': ' + this.writeScreen.getDisplayText(true));
+    if (this.mode === 'MODE_PAINT-ON' || this.mode === 'MODE_ROLL-UP') {
+      this.logger.log(1, () => 'DISPLAYED: ' + this.displayedMemory.getDisplayText(true));
+      this.outputDataUpdate();
+    }
+  }
+  ccRCL() {
+    // Resume Caption Loading (switch mode to Pop On)
+    this.logger.log(2, 'RCL - Resume Caption Loading');
+    this.setMode('MODE_POP-ON');
+  }
+  ccBS() {
+    // BackSpace
+    this.logger.log(2, 'BS - BackSpace');
+    if (this.mode === 'MODE_TEXT') {
+      return;
+    }
+    this.writeScreen.backSpace();
+    if (this.writeScreen === this.displayedMemory) {
+      this.outputDataUpdate();
+    }
+  }
+  ccAOF() {
+    // Reserved (formerly Alarm Off)
+  }
+  ccAON() {
+    // Reserved (formerly Alarm On)
+  }
+  ccDER() {
+    // Delete to End of Row
+    this.logger.log(2, 'DER- Delete to End of Row');
+    this.writeScreen.clearToEndOfRow();
+    this.outputDataUpdate();
+  }
+  ccRU(nrRows) {
+    // Roll-Up Captions-2,3,or 4 Rows
+    this.logger.log(2, 'RU(' + nrRows + ') - Roll Up');
+    this.writeScreen = this.displayedMemory;
+    this.setMode('MODE_ROLL-UP');
+    this.writeScreen.setRollUpRows(nrRows);
+  }
+  ccFON() {
+    // Flash On
+    this.logger.log(2, 'FON - Flash On');
+    this.writeScreen.setPen({
+      flash: true
+    });
+  }
+  ccRDC() {
+    // Resume Direct Captioning (switch mode to PaintOn)
+    this.logger.log(2, 'RDC - Resume Direct Captioning');
+    this.setMode('MODE_PAINT-ON');
+  }
+  ccTR() {
+    // Text Restart in text mode (not supported, however)
+    this.logger.log(2, 'TR');
+    this.setMode('MODE_TEXT');
+  }
+  ccRTD() {
+    // Resume Text Display in Text mode (not supported, however)
+    this.logger.log(2, 'RTD');
+    this.setMode('MODE_TEXT');
+  }
+  ccEDM() {
+    // Erase Displayed Memory
+    this.logger.log(2, 'EDM - Erase Displayed Memory');
+    this.displayedMemory.reset();
+    this.outputDataUpdate(true);
+  }
+  ccCR() {
+    // Carriage Return
+    this.logger.log(2, 'CR - Carriage Return');
+    this.writeScreen.rollUp();
+    this.outputDataUpdate(true);
+  }
+  ccENM() {
+    // Erase Non-Displayed Memory
+    this.logger.log(2, 'ENM - Erase Non-displayed Memory');
+    this.nonDisplayedMemory.reset();
+  }
+  ccEOC() {
+    // End of Caption (Flip Memories)
+    this.logger.log(2, 'EOC - End Of Caption');
+    if (this.mode === 'MODE_POP-ON') {
+      const tmp = this.displayedMemory;
+      this.displayedMemory = this.nonDisplayedMemory;
+      this.nonDisplayedMemory = tmp;
+      this.writeScreen = this.nonDisplayedMemory;
+      this.logger.log(1, () => 'DISP: ' + this.displayedMemory.getDisplayText());
+    }
+    this.outputDataUpdate(true);
+  }
+  ccTO(nrCols) {
+    // Tab Offset 1,2, or 3 columns
+    this.logger.log(2, 'TO(' + nrCols + ') - Tab Offset');
+    this.writeScreen.moveCursor(nrCols);
+  }
+  ccMIDROW(secondByte) {
+    // Parse MIDROW command
+    const styles = {
+      flash: false
+    };
+    styles.underline = secondByte % 2 === 1;
+    styles.italics = secondByte >= 0x2e;
+    if (!styles.italics) {
+      const colorIndex = Math.floor(secondByte / 2) - 0x10;
+      const colors = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta'];
+      styles.foreground = colors[colorIndex];
+    } else {
+      styles.foreground = 'white';
+    }
+    this.logger.log(2, 'MIDROW: ' + stringify(styles));
+    this.writeScreen.setPen(styles);
+  }
+  outputDataUpdate(dispatch = false) {
+    const time = this.logger.time;
+    if (time === null) {
+      return;
+    }
+    if (this.outputFilter) {
+      if (this.cueStartTime === null && !this.displayedMemory.isEmpty()) {
+        // Start of a new cue
+        this.cueStartTime = time;
+      } else {
+        if (!this.displayedMemory.equals(this.lastOutputScreen)) {
+          this.outputFilter.newCue(this.cueStartTime, time, this.lastOutputScreen);
+          if (dispatch && this.outputFilter.dispatchCue) {
+            this.outputFilter.dispatchCue();
+          }
+          this.cueStartTime = this.displayedMemory.isEmpty() ? null : time;
+        }
+      }
+      this.lastOutputScreen.copy(this.displayedMemory);
+    }
+  }
+  cueSplitAtTime(t) {
+    if (this.outputFilter) {
+      if (!this.displayedMemory.isEmpty()) {
+        if (this.outputFilter.newCue) {
+          this.outputFilter.newCue(this.cueStartTime, t, this.displayedMemory);
+        }
+        this.cueStartTime = t;
+      }
+    }
+  }
+}
+
+// Will be 1 or 2 when parsing captions
+
+class Cea608Parser {
+  constructor(field, out1, out2) {
+    this.channels = void 0;
+    this.currentChannel = 0;
+    this.cmdHistory = createCmdHistory();
+    this.logger = void 0;
+    const logger = this.logger = new CaptionsLogger();
+    this.channels = [null, new Cea608Channel(field, out1, logger), new Cea608Channel(field + 1, out2, logger)];
+  }
+  getHandler(channel) {
+    return this.channels[channel].getHandler();
+  }
+  setHandler(channel, newHandler) {
+    this.channels[channel].setHandler(newHandler);
+  }
+
+  /**
+   * Add data for time t in forms of list of bytes (unsigned ints). The bytes are treated as pairs.
+   */
+  addData(time, byteList) {
+    this.logger.time = time;
+    for (let i = 0; i < byteList.length; i += 2) {
+      const a = byteList[i] & 0x7f;
+      const b = byteList[i + 1] & 0x7f;
+      let cmdFound = false;
+      let charsFound = null;
+      if (a === 0 && b === 0) {
+        continue;
+      } else {
+        this.logger.log(3, () => '[' + numArrayToHexArray([byteList[i], byteList[i + 1]]) + '] -> (' + numArrayToHexArray([a, b]) + ')');
+      }
+      const cmdHistory = this.cmdHistory;
+      const isControlCode = a >= 0x10 && a <= 0x1f;
+      if (isControlCode) {
+        // Skip redundant control codes
+        if (hasCmdRepeated(a, b, cmdHistory)) {
+          setLastCmd(null, null, cmdHistory);
+          this.logger.log(3, () => 'Repeated command (' + numArrayToHexArray([a, b]) + ') is dropped');
+          continue;
+        }
+        setLastCmd(a, b, this.cmdHistory);
+        cmdFound = this.parseCmd(a, b);
+        if (!cmdFound) {
+          cmdFound = this.parseMidrow(a, b);
+        }
+        if (!cmdFound) {
+          cmdFound = this.parsePAC(a, b);
+        }
+        if (!cmdFound) {
+          cmdFound = this.parseBackgroundAttributes(a, b);
+        }
+      } else {
+        setLastCmd(null, null, cmdHistory);
+      }
+      if (!cmdFound) {
+        charsFound = this.parseChars(a, b);
+        if (charsFound) {
+          const currChNr = this.currentChannel;
+          if (currChNr && currChNr > 0) {
+            const channel = this.channels[currChNr];
+            channel.insertChars(charsFound);
+          } else {
+            this.logger.log(2, 'No channel found yet. TEXT-MODE?');
+          }
+        }
+      }
+      if (!cmdFound && !charsFound) {
+        this.logger.log(2, () => "Couldn't parse cleaned data " + numArrayToHexArray([a, b]) + ' orig: ' + numArrayToHexArray([byteList[i], byteList[i + 1]]));
+      }
+    }
+  }
+
+  /**
+   * Parse Command.
+   * @returns True if a command was found
+   */
+  parseCmd(a, b) {
+    const cond1 = (a === 0x14 || a === 0x1c || a === 0x15 || a === 0x1d) && b >= 0x20 && b <= 0x2f;
+    const cond2 = (a === 0x17 || a === 0x1f) && b >= 0x21 && b <= 0x23;
+    if (!(cond1 || cond2)) {
+      return false;
+    }
+    const chNr = a === 0x14 || a === 0x15 || a === 0x17 ? 1 : 2;
+    const channel = this.channels[chNr];
+    if (a === 0x14 || a === 0x15 || a === 0x1c || a === 0x1d) {
+      if (b === 0x20) {
+        channel.ccRCL();
+      } else if (b === 0x21) {
+        channel.ccBS();
+      } else if (b === 0x22) {
+        channel.ccAOF();
+      } else if (b === 0x23) {
+        channel.ccAON();
+      } else if (b === 0x24) {
+        channel.ccDER();
+      } else if (b === 0x25) {
+        channel.ccRU(2);
+      } else if (b === 0x26) {
+        channel.ccRU(3);
+      } else if (b === 0x27) {
+        channel.ccRU(4);
+      } else if (b === 0x28) {
+        channel.ccFON();
+      } else if (b === 0x29) {
+        channel.ccRDC();
+      } else if (b === 0x2a) {
+        channel.ccTR();
+      } else if (b === 0x2b) {
+        channel.ccRTD();
+      } else if (b === 0x2c) {
+        channel.ccEDM();
+      } else if (b === 0x2d) {
+        channel.ccCR();
+      } else if (b === 0x2e) {
+        channel.ccENM();
+      } else if (b === 0x2f) {
+        channel.ccEOC();
+      }
+    } else {
+      // a == 0x17 || a == 0x1F
+      channel.ccTO(b - 0x20);
+    }
+    this.currentChannel = chNr;
+    return true;
+  }
+
+  /**
+   * Parse midrow styling command
+   */
+  parseMidrow(a, b) {
+    let chNr = 0;
+    if ((a === 0x11 || a === 0x19) && b >= 0x20 && b <= 0x2f) {
+      if (a === 0x11) {
+        chNr = 1;
+      } else {
+        chNr = 2;
+      }
+      if (chNr !== this.currentChannel) {
+        this.logger.log(0, 'Mismatch channel in midrow parsing');
+        return false;
+      }
+      const channel = this.channels[chNr];
+      if (!channel) {
+        return false;
+      }
+      channel.ccMIDROW(b);
+      this.logger.log(3, () => 'MIDROW (' + numArrayToHexArray([a, b]) + ')');
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Parse Preable Access Codes (Table 53).
+   * @returns {Boolean} Tells if PAC found
+   */
+  parsePAC(a, b) {
+    let row;
+    const case1 = (a >= 0x11 && a <= 0x17 || a >= 0x19 && a <= 0x1f) && b >= 0x40 && b <= 0x7f;
+    const case2 = (a === 0x10 || a === 0x18) && b >= 0x40 && b <= 0x5f;
+    if (!(case1 || case2)) {
+      return false;
+    }
+    const chNr = a <= 0x17 ? 1 : 2;
+    if (b >= 0x40 && b <= 0x5f) {
+      row = chNr === 1 ? rowsLowCh1[a] : rowsLowCh2[a];
+    } else {
+      // 0x60 <= b <= 0x7F
+      row = chNr === 1 ? rowsHighCh1[a] : rowsHighCh2[a];
+    }
+    const channel = this.channels[chNr];
+    if (!channel) {
+      return false;
+    }
+    channel.setPAC(this.interpretPAC(row, b));
+    this.currentChannel = chNr;
+    return true;
+  }
+
+  /**
+   * Interpret the second byte of the pac, and return the information.
+   * @returns pacData with style parameters
+   */
+  interpretPAC(row, byte) {
+    let pacIndex;
+    const pacData = {
+      color: null,
+      italics: false,
+      indent: null,
+      underline: false,
+      row: row
+    };
+    if (byte > 0x5f) {
+      pacIndex = byte - 0x60;
+    } else {
+      pacIndex = byte - 0x40;
+    }
+    pacData.underline = (pacIndex & 1) === 1;
+    if (pacIndex <= 0xd) {
+      pacData.color = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta', 'white'][Math.floor(pacIndex / 2)];
+    } else if (pacIndex <= 0xf) {
+      pacData.italics = true;
+      pacData.color = 'white';
+    } else {
+      pacData.indent = Math.floor((pacIndex - 0x10) / 2) * 4;
+    }
+    return pacData; // Note that row has zero offset. The spec uses 1.
+  }
+
+  /**
+   * Parse characters.
+   * @returns An array with 1 to 2 codes corresponding to chars, if found. null otherwise.
+   */
+  parseChars(a, b) {
+    let channelNr;
+    let charCodes = null;
+    let charCode1 = null;
+    if (a >= 0x19) {
+      channelNr = 2;
+      charCode1 = a - 8;
+    } else {
+      channelNr = 1;
+      charCode1 = a;
+    }
+    if (charCode1 >= 0x11 && charCode1 <= 0x13) {
+      // Special character
+      let oneCode;
+      if (charCode1 === 0x11) {
+        oneCode = b + 0x50;
+      } else if (charCode1 === 0x12) {
+        oneCode = b + 0x70;
+      } else {
+        oneCode = b + 0x90;
+      }
+      this.logger.log(2, () => "Special char '" + getCharForByte(oneCode) + "' in channel " + channelNr);
+      charCodes = [oneCode];
+    } else if (a >= 0x20 && a <= 0x7f) {
+      charCodes = b === 0 ? [a] : [a, b];
+    }
+    if (charCodes) {
+      this.logger.log(3, () => 'Char codes =  ' + numArrayToHexArray(charCodes).join(','));
+    }
+    return charCodes;
+  }
+
+  /**
+   * Parse extended background attributes as well as new foreground color black.
+   * @returns True if background attributes are found
+   */
+  parseBackgroundAttributes(a, b) {
+    const case1 = (a === 0x10 || a === 0x18) && b >= 0x20 && b <= 0x2f;
+    const case2 = (a === 0x17 || a === 0x1f) && b >= 0x2d && b <= 0x2f;
+    if (!(case1 || case2)) {
+      return false;
+    }
+    let index;
+    const bkgData = {};
+    if (a === 0x10 || a === 0x18) {
+      index = Math.floor((b - 0x20) / 2);
+      bkgData.background = backgroundColors[index];
+      if (b % 2 === 1) {
+        bkgData.background = bkgData.background + '_semi';
+      }
+    } else if (b === 0x2d) {
+      bkgData.background = 'transparent';
+    } else {
+      bkgData.foreground = 'black';
+      if (b === 0x2f) {
+        bkgData.underline = true;
+      }
+    }
+    const chNr = a <= 0x17 ? 1 : 2;
+    const channel = this.channels[chNr];
+    channel.setBkgData(bkgData);
+    return true;
+  }
+
+  /**
+   * Reset state of parser and its channels.
+   */
+  reset() {
+    for (let i = 0; i < Object.keys(this.channels).length; i++) {
+      const channel = this.channels[i];
+      if (channel) {
+        channel.reset();
+      }
+    }
+    setLastCmd(null, null, this.cmdHistory);
+  }
+
+  /**
+   * Trigger the generation of a cue, and the start of a new one if displayScreens are not empty.
+   */
+  cueSplitAtTime(t) {
+    for (let i = 0; i < this.channels.length; i++) {
+      const channel = this.channels[i];
+      if (channel) {
+        channel.cueSplitAtTime(t);
+      }
+    }
+  }
+}
+function setLastCmd(a, b, cmdHistory) {
+  cmdHistory.a = a;
+  cmdHistory.b = b;
+}
+function hasCmdRepeated(a, b, cmdHistory) {
+  return cmdHistory.a === a && cmdHistory.b === b;
+}
+function createCmdHistory() {
+  return {
+    a: null,
+    b: null
+  };
+}
+
+/**
+ * Copyright 2013 vtt.js Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var VTTCue = (function () {
+  if (optionalSelf != null && optionalSelf.VTTCue) {
+    return self.VTTCue;
+  }
+  const AllowedDirections = ['', 'lr', 'rl'];
+  const AllowedAlignments = ['start', 'middle', 'end', 'left', 'right'];
+  function isAllowedValue(allowed, value) {
+    if (typeof value !== 'string') {
+      return false;
+    }
+    // necessary for assuring the generic conforms to the Array interface
+    if (!Array.isArray(allowed)) {
+      return false;
+    }
+    // reset the type so that the next narrowing works well
+    const lcValue = value.toLowerCase();
+    // use the allow list to narrow the type to a specific subset of strings
+    if (~allowed.indexOf(lcValue)) {
+      return lcValue;
+    }
+    return false;
+  }
+  function findDirectionSetting(value) {
+    return isAllowedValue(AllowedDirections, value);
+  }
+  function findAlignSetting(value) {
+    return isAllowedValue(AllowedAlignments, value);
+  }
+  function extend(obj, ...rest) {
+    let i = 1;
+    for (; i < arguments.length; i++) {
+      const cobj = arguments[i];
+      for (const p in cobj) {
+        obj[p] = cobj[p];
+      }
+    }
+    return obj;
+  }
+  function VTTCue(startTime, endTime, text) {
+    const cue = this;
+    const baseObj = {
+      enumerable: true
+    };
+    /**
+     * Shim implementation specific properties. These properties are not in
+     * the spec.
+     */
+
+    // Lets us know when the VTTCue's data has changed in such a way that we need
+    // to recompute its display state. This lets us compute its display state
+    // lazily.
+    cue.hasBeenReset = false;
+
+    /**
+     * VTTCue and TextTrackCue properties
+     * http://dev.w3.org/html5/webvtt/#vttcue-interface
+     */
+
+    let _id = '';
+    let _pauseOnExit = false;
+    let _startTime = startTime;
+    let _endTime = endTime;
+    let _text = text;
+    let _region = null;
+    let _vertical = '';
+    let _snapToLines = true;
+    let _line = 'auto';
+    let _lineAlign = 'start';
+    let _position = 50;
+    let _positionAlign = 'middle';
+    let _size = 50;
+    let _align = 'middle';
+    Object.defineProperty(cue, 'id', extend({}, baseObj, {
+      get: function () {
+        return _id;
+      },
+      set: function (value) {
+        _id = '' + value;
+      }
+    }));
+    Object.defineProperty(cue, 'pauseOnExit', extend({}, baseObj, {
+      get: function () {
+        return _pauseOnExit;
+      },
+      set: function (value) {
+        _pauseOnExit = !!value;
+      }
+    }));
+    Object.defineProperty(cue, 'startTime', extend({}, baseObj, {
+      get: function () {
+        return _startTime;
+      },
+      set: function (value) {
+        if (typeof value !== 'number') {
+          throw new TypeError('Start time must be set to a number.');
+        }
+        _startTime = value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'endTime', extend({}, baseObj, {
+      get: function () {
+        return _endTime;
+      },
+      set: function (value) {
+        if (typeof value !== 'number') {
+          throw new TypeError('End time must be set to a number.');
+        }
+        _endTime = value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'text', extend({}, baseObj, {
+      get: function () {
+        return _text;
+      },
+      set: function (value) {
+        _text = '' + value;
+        this.hasBeenReset = true;
+      }
+    }));
+
+    // todo: implement VTTRegion polyfill?
+    Object.defineProperty(cue, 'region', extend({}, baseObj, {
+      get: function () {
+        return _region;
+      },
+      set: function (value) {
+        _region = value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'vertical', extend({}, baseObj, {
+      get: function () {
+        return _vertical;
+      },
+      set: function (value) {
+        const setting = findDirectionSetting(value);
+        // Have to check for false because the setting an be an empty string.
+        if (setting === false) {
+          throw new SyntaxError('An invalid or illegal string was specified.');
+        }
+        _vertical = setting;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'snapToLines', extend({}, baseObj, {
+      get: function () {
+        return _snapToLines;
+      },
+      set: function (value) {
+        _snapToLines = !!value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'line', extend({}, baseObj, {
+      get: function () {
+        return _line;
+      },
+      set: function (value) {
+        if (typeof value !== 'number' && value !== 'auto') {
+          throw new SyntaxError('An invalid number or illegal string was specified.');
+        }
+        _line = value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'lineAlign', extend({}, baseObj, {
+      get: function () {
+        return _lineAlign;
+      },
+      set: function (value) {
+        const setting = findAlignSetting(value);
+        if (!setting) {
+          throw new SyntaxError('An invalid or illegal string was specified.');
+        }
+        _lineAlign = setting;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'position', extend({}, baseObj, {
+      get: function () {
+        return _position;
+      },
+      set: function (value) {
+        if (value < 0 || value > 100) {
+          throw new Error('Position must be between 0 and 100.');
+        }
+        _position = value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'positionAlign', extend({}, baseObj, {
+      get: function () {
+        return _positionAlign;
+      },
+      set: function (value) {
+        const setting = findAlignSetting(value);
+        if (!setting) {
+          throw new SyntaxError('An invalid or illegal string was specified.');
+        }
+        _positionAlign = setting;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'size', extend({}, baseObj, {
+      get: function () {
+        return _size;
+      },
+      set: function (value) {
+        if (value < 0 || value > 100) {
+          throw new Error('Size must be between 0 and 100.');
+        }
+        _size = value;
+        this.hasBeenReset = true;
+      }
+    }));
+    Object.defineProperty(cue, 'align', extend({}, baseObj, {
+      get: function () {
+        return _align;
+      },
+      set: function (value) {
+        const setting = findAlignSetting(value);
+        if (!setting) {
+          throw new SyntaxError('An invalid or illegal string was specified.');
+        }
+        _align = setting;
+        this.hasBeenReset = true;
+      }
+    }));
+
+    /**
+     * Other <track> spec defined properties
+     */
+
+    // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state
+    cue.displayState = undefined;
+  }
+
+  /**
+   * VTTCue methods
+   */
+
+  VTTCue.prototype.getCueAsHTML = function () {
+    // Assume WebVTT.convertCueToDOMTree is on the global.
+    const WebVTT = self.WebVTT;
+    return WebVTT.convertCueToDOMTree(self, this.text);
+  };
+  // this is a polyfill hack
+  return VTTCue;
+})();
+
+/*
+ * Source: https://github.com/mozilla/vtt.js/blob/master/dist/vtt.js
+ */
+
+class StringDecoder {
+  decode(data, options) {
+    if (!data) {
+      return '';
+    }
+    if (typeof data !== 'string') {
+      throw new Error('Error - expected string data.');
+    }
+    return decodeURIComponent(encodeURIComponent(data));
+  }
+}
+
+// Try to parse input as a time stamp.
+function parseTimeStamp(input) {
+  function computeSeconds(h, m, s, f) {
+    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + parseFloat(f || 0);
+  }
+  const m = input.match(/^(?:(\d+):)?(\d{2}):(\d{2})(\.\d+)?/);
+  if (!m) {
+    return null;
+  }
+  if (parseFloat(m[2]) > 59) {
+    // Timestamp takes the form of [hours]:[minutes].[milliseconds]
+    // First position is hours as it's over 59.
+    return computeSeconds(m[2], m[3], 0, m[4]);
+  }
+  // Timestamp takes the form of [hours (optional)]:[minutes]:[seconds].[milliseconds]
+  return computeSeconds(m[1], m[2], m[3], m[4]);
+}
+
+// A settings object holds key/value pairs and will ignore anything but the first
+// assignment to a specific key.
+class Settings {
+  constructor() {
+    this.values = Object.create(null);
+  }
+  // Only accept the first assignment to any key.
+  set(k, v) {
+    if (!this.get(k) && v !== '') {
+      this.values[k] = v;
+    }
+  }
+  // Return the value for a key, or a default value.
+  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with
+  // a number of possible default values as properties where 'defaultKey' is
+  // the key of the property that will be chosen; otherwise it's assumed to be
+  // a single value.
+  get(k, dflt, defaultKey) {
+    if (defaultKey) {
+      return this.has(k) ? this.values[k] : dflt[defaultKey];
+    }
+    return this.has(k) ? this.values[k] : dflt;
+  }
+  // Check whether we have a value for a key.
+  has(k) {
+    return k in this.values;
+  }
+  // Accept a setting if its one of the given alternatives.
+  alt(k, v, a) {
+    for (let n = 0; n < a.length; ++n) {
+      if (v === a[n]) {
+        this.set(k, v);
+        break;
+      }
+    }
+  }
+  // Accept a setting if its a valid (signed) integer.
+  integer(k, v) {
+    if (/^-?\d+$/.test(v)) {
+      // integer
+      this.set(k, parseInt(v, 10));
+    }
+  }
+  // Accept a setting if its a valid percentage.
+  percent(k, v) {
+    if (/^([\d]{1,3})(\.[\d]*)?%$/.test(v)) {
+      const percent = parseFloat(v);
+      if (percent >= 0 && percent <= 100) {
+        this.set(k, percent);
+        return true;
+      }
+    }
+    return false;
+  }
+}
+
+// Helper function to parse input into groups separated by 'groupDelim', and
+// interpret each group as a key/value pair separated by 'keyValueDelim'.
+function parseOptions(input, callback, keyValueDelim, groupDelim) {
+  const groups = groupDelim ? input.split(groupDelim) : [input];
+  for (const i in groups) {
+    if (typeof groups[i] !== 'string') {
+      continue;
+    }
+    const kv = groups[i].split(keyValueDelim);
+    if (kv.length !== 2) {
+      continue;
+    }
+    const k = kv[0];
+    const v = kv[1];
+    callback(k, v);
+  }
+}
+const defaults = new VTTCue(0, 0, '');
+// 'middle' was changed to 'center' in the spec: https://github.com/w3c/webvtt/pull/244
+//  Safari doesn't yet support this change, but FF and Chrome do.
+const center = defaults.align === 'middle' ? 'middle' : 'center';
+function parseCue(input, cue, regionList) {
+  // Remember the original input if we need to throw an error.
+  const oInput = input;
+  // 4.1 WebVTT timestamp
+  function consumeTimeStamp() {
+    const ts = parseTimeStamp(input);
+    if (ts === null) {
+      throw new Error('Malformed timestamp: ' + oInput);
+    }
+
+    // Remove time stamp from input.
+    input = input.replace(/^[^\sa-zA-Z-]+/, '');
+    return ts;
+  }
+
+  // 4.4.2 WebVTT cue settings
+  function consumeCueSettings(input, cue) {
+    const settings = new Settings();
+    parseOptions(input, function (k, v) {
+      let vals;
+      switch (k) {
+        case 'region':
+          // Find the last region we parsed with the same region id.
+          for (let i = regionList.length - 1; i >= 0; i--) {
+            if (regionList[i].id === v) {
+              settings.set(k, regionList[i].region);
+              break;
+            }
+          }
+          break;
+        case 'vertical':
+          settings.alt(k, v, ['rl', 'lr']);
+          break;
+        case 'line':
+          vals = v.split(',');
+          settings.integer(k, vals[0]);
+          if (settings.percent(k, vals[0])) {
+            settings.set('snapToLines', false);
+          }
+          settings.alt(k, vals[0], ['auto']);
+          if (vals.length === 2) {
+            settings.alt('lineAlign', vals[1], ['start', center, 'end']);
+          }
+          break;
+        case 'position':
+          vals = v.split(',');
+          settings.percent(k, vals[0]);
+          if (vals.length === 2) {
+            settings.alt('positionAlign', vals[1], ['start', center, 'end', 'line-left', 'line-right', 'auto']);
+          }
+          break;
+        case 'size':
+          settings.percent(k, v);
+          break;
+        case 'align':
+          settings.alt(k, v, ['start', center, 'end', 'left', 'right']);
+          break;
+      }
+    }, /:/, /\s/);
+
+    // Apply default values for any missing fields.
+    cue.region = settings.get('region', null);
+    cue.vertical = settings.get('vertical', '');
+    let line = settings.get('line', 'auto');
+    if (line === 'auto' && defaults.line === -1) {
+      // set numeric line number for Safari
+      line = -1;
+    }
+    cue.line = line;
+    cue.lineAlign = settings.get('lineAlign', 'start');
+    cue.snapToLines = settings.get('snapToLines', true);
+    cue.size = settings.get('size', 100);
+    cue.align = settings.get('align', center);
+    let position = settings.get('position', 'auto');
+    if (position === 'auto' && defaults.position === 50) {
+      // set numeric position for Safari
+      position = cue.align === 'start' || cue.align === 'left' ? 0 : cue.align === 'end' || cue.align === 'right' ? 100 : 50;
+    }
+    cue.position = position;
+  }
+  function skipWhitespace() {
+    input = input.replace(/^\s+/, '');
+  }
+
+  // 4.1 WebVTT cue timings.
+  skipWhitespace();
+  cue.startTime = consumeTimeStamp(); // (1) collect cue start time
+  skipWhitespace();
+  if (input.slice(0, 3) !== '-->') {
+    // (3) next characters must match '-->'
+    throw new Error("Malformed time stamp (time stamps must be separated by '-->'): " + oInput);
+  }
+  input = input.slice(3);
+  skipWhitespace();
+  cue.endTime = consumeTimeStamp(); // (5) collect cue end time
+
+  // 4.1 WebVTT cue settings list.
+  skipWhitespace();
+  consumeCueSettings(input, cue);
+}
+function fixLineBreaks(input) {
+  return input.replace(/<br(?: \/)?>/gi, '\n');
+}
+class VTTParser {
+  constructor() {
+    this.state = 'INITIAL';
+    this.buffer = '';
+    this.decoder = new StringDecoder();
+    this.regionList = [];
+    this.cue = null;
+    this.oncue = void 0;
+    this.onparsingerror = void 0;
+    this.onflush = void 0;
+  }
+  parse(data) {
+    const _this = this;
+
+    // If there is no data then we won't decode it, but will just try to parse
+    // whatever is in buffer already. This may occur in circumstances, for
+    // example when flush() is called.
+    if (data) {
+      // Try to decode the data that we received.
+      _this.buffer += _this.decoder.decode(data, {
+        stream: true
+      });
+    }
+    function collectNextLine() {
+      let buffer = _this.buffer;
+      let pos = 0;
+      buffer = fixLineBreaks(buffer);
+      while (pos < buffer.length && buffer[pos] !== '\r' && buffer[pos] !== '\n') {
+        ++pos;
+      }
+      const line = buffer.slice(0, pos);
+      // Advance the buffer early in case we fail below.
+      if (buffer[pos] === '\r') {
+        ++pos;
+      }
+      if (buffer[pos] === '\n') {
+        ++pos;
+      }
+      _this.buffer = buffer.slice(pos);
+      return line;
+    }
+
+    // 3.2 WebVTT metadata header syntax
+    function parseHeader(input) {
+      parseOptions(input, function (k, v) {
+        // switch (k) {
+        // case 'region':
+        // 3.3 WebVTT region metadata header syntax
+        // console.log('parse region', v);
+        // parseRegion(v);
+        // break;
+        // }
+      }, /:/);
+    }
+
+    // 5.1 WebVTT file parsing.
+    try {
+      let line = '';
+      if (_this.state === 'INITIAL') {
+        // We can't start parsing until we have the first line.
+        if (!/\r\n|\n/.test(_this.buffer)) {
+          return this;
+        }
+        line = collectNextLine();
+        // strip of UTF-8 BOM if any
+        // https://en.wikipedia.org/wiki/Byte_order_mark#UTF-8
+        const m = line.match(/^()?WEBVTT([ \t].*)?$/);
+        if (!(m != null && m[0])) {
+          throw new Error('Malformed WebVTT signature.');
+        }
+        _this.state = 'HEADER';
+      }
+      let alreadyCollectedLine = false;
+      while (_this.buffer) {
+        // We can't parse a line until we have the full line.
+        if (!/\r\n|\n/.test(_this.buffer)) {
+          return this;
+        }
+        if (!alreadyCollectedLine) {
+          line = collectNextLine();
+        } else {
+          alreadyCollectedLine = false;
+        }
+        switch (_this.state) {
+          case 'HEADER':
+            // 13-18 - Allow a header (metadata) under the WEBVTT line.
+            if (/:/.test(line)) {
+              parseHeader(line);
+            } else if (!line) {
+              // An empty line terminates the header and starts the body (cues).
+              _this.state = 'ID';
+            }
+            continue;
+          case 'NOTE':
+            // Ignore NOTE blocks.
+            if (!line) {
+              _this.state = 'ID';
+            }
+            continue;
+          case 'ID':
+            // Check for the start of NOTE blocks.
+            if (/^NOTE($|[ \t])/.test(line)) {
+              _this.state = 'NOTE';
+              break;
+            }
+            // 19-29 - Allow any number of line terminators, then initialize new cue values.
+            if (!line) {
+              continue;
+            }
+            _this.cue = new VTTCue(0, 0, '');
+            _this.state = 'CUE';
+            // 30-39 - Check if self line contains an optional identifier or timing data.
+            if (line.indexOf('-->') === -1) {
+              _this.cue.id = line;
+              continue;
+            }
+          // Process line as start of a cue.
+          /* falls through */
+          case 'CUE':
+            // 40 - Collect cue timings and settings.
+            if (!_this.cue) {
+              _this.state = 'BADCUE';
+              continue;
+            }
+            try {
+              parseCue(line, _this.cue, _this.regionList);
+            } catch (e) {
+              // In case of an error ignore rest of the cue.
+              _this.cue = null;
+              _this.state = 'BADCUE';
+              continue;
+            }
+            _this.state = 'CUETEXT';
+            continue;
+          case 'CUETEXT':
+            {
+              const hasSubstring = line.indexOf('-->') !== -1;
+              // 34 - If we have an empty line then report the cue.
+              // 35 - If we have the special substring '-->' then report the cue,
+              // but do not collect the line as we need to process the current
+              // one as a new cue.
+              if (!line || hasSubstring && (alreadyCollectedLine = true)) {
+                // We are done parsing self cue.
+                if (_this.oncue && _this.cue) {
+                  _this.oncue(_this.cue);
+                }
+                _this.cue = null;
+                _this.state = 'ID';
+                continue;
+              }
+              if (_this.cue === null) {
+                continue;
+              }
+              if (_this.cue.text) {
+                _this.cue.text += '\n';
+              }
+              _this.cue.text += line;
+            }
+            continue;
+          case 'BADCUE':
+            // 54-62 - Collect and discard the remaining cue.
+            if (!line) {
+              _this.state = 'ID';
+            }
+        }
+      }
+    } catch (e) {
+      // If we are currently parsing a cue, report what we have.
+      if (_this.state === 'CUETEXT' && _this.cue && _this.oncue) {
+        _this.oncue(_this.cue);
+      }
+      _this.cue = null;
+      // Enter BADWEBVTT state if header was not parsed correctly otherwise
+      // another exception occurred so enter BADCUE state.
+      _this.state = _this.state === 'INITIAL' ? 'BADWEBVTT' : 'BADCUE';
+    }
+    return this;
+  }
+  flush() {
+    const _this = this;
+    try {
+      // Finish decoding the stream.
+      // _this.buffer += _this.decoder.decode();
+      // Synthesize the end of the current cue or region.
+      if (_this.cue || _this.state === 'HEADER') {
+        _this.buffer += '\n\n';
+        _this.parse();
+      }
+      // If we've flushed, parsed, and we're still on the INITIAL state then
+      // that means we don't have enough of the stream to parse the first
+      // line.
+      if (_this.state === 'INITIAL' || _this.state === 'BADWEBVTT') {
+        throw new Error('Malformed WebVTT signature.');
+      }
+    } catch (e) {
+      if (_this.onparsingerror) {
+        _this.onparsingerror(e);
+      }
+    }
+    if (_this.onflush) {
+      _this.onflush();
+    }
+    return this;
+  }
+}
+
+const LINEBREAKS = /\r\n|\n\r|\n|\r/g;
+
+// String.prototype.startsWith is not supported in IE11
+const startsWith = function startsWith(inputString, searchString, position = 0) {
+  return inputString.slice(position, position + searchString.length) === searchString;
+};
+const cueString2millis = function cueString2millis(timeString) {
+  let ts = parseInt(timeString.slice(-3));
+  const secs = parseInt(timeString.slice(-6, -4));
+  const mins = parseInt(timeString.slice(-9, -7));
+  const hours = timeString.length > 9 ? parseInt(timeString.substring(0, timeString.indexOf(':'))) : 0;
+  if (!isFiniteNumber(ts) || !isFiniteNumber(secs) || !isFiniteNumber(mins) || !isFiniteNumber(hours)) {
+    throw Error(`Malformed X-TIMESTAMP-MAP: Local:${timeString}`);
+  }
+  ts += 1000 * secs;
+  ts += 60 * 1000 * mins;
+  ts += 60 * 60 * 1000 * hours;
+  return ts;
+};
+
+// Create a unique hash id for a cue based on start/end times and text.
+// This helps timeline-controller to avoid showing repeated captions.
+function generateCueId(startTime, endTime, text) {
+  return hash(startTime.toString()) + hash(endTime.toString()) + hash(text);
+}
+const calculateOffset = function calculateOffset(vttCCs, cc, presentationTime) {
+  let currCC = vttCCs[cc];
+  let prevCC = vttCCs[currCC.prevCC];
+
+  // This is the first discontinuity or cues have been processed since the last discontinuity
+  // Offset = current discontinuity time
+  if (!prevCC || !prevCC.new && currCC.new) {
+    vttCCs.ccOffset = vttCCs.presentationOffset = currCC.start;
+    currCC.new = false;
+    return;
+  }
+
+  // There have been discontinuities since cues were last parsed.
+  // Offset = time elapsed
+  while ((_prevCC = prevCC) != null && _prevCC.new) {
+    var _prevCC;
+    vttCCs.ccOffset += currCC.start - prevCC.start;
+    currCC.new = false;
+    currCC = prevCC;
+    prevCC = vttCCs[currCC.prevCC];
+  }
+  vttCCs.presentationOffset = presentationTime;
+};
+function parseWebVTT(vttByteArray, initPTS, vttCCs, cc, timeOffset, callBack, errorCallBack) {
+  const parser = new VTTParser();
+  // Convert byteArray into string, replacing any somewhat exotic linefeeds with "\n", then split on that character.
+  // Uint8Array.prototype.reduce is not implemented in IE11
+  const vttLines = utf8ArrayToStr(new Uint8Array(vttByteArray)).trim().replace(LINEBREAKS, '\n').split('\n');
+  const cues = [];
+  const init90kHz = initPTS ? toMpegTsClockFromTimescale(initPTS.baseTime, initPTS.timescale) : 0;
+  let cueTime = '00:00.000';
+  let timestampMapMPEGTS = 0;
+  let timestampMapLOCAL = 0;
+  let parsingError;
+  let inHeader = true;
+  parser.oncue = function (cue) {
+    // Adjust cue timing; clamp cues to start no earlier than - and drop cues that don't end after - 0 on timeline.
+    const currCC = vttCCs[cc];
+    let cueOffset = vttCCs.ccOffset;
+
+    // Calculate subtitle PTS offset
+    const webVttMpegTsMapOffset = (timestampMapMPEGTS - init90kHz) / 90000;
+
+    // Update offsets for new discontinuities
+    if (currCC != null && currCC.new) {
+      if (timestampMapLOCAL !== undefined) {
+        // When local time is provided, offset = discontinuity start time - local time
+        cueOffset = vttCCs.ccOffset = currCC.start;
+      } else {
+        calculateOffset(vttCCs, cc, webVttMpegTsMapOffset);
+      }
+    }
+    if (webVttMpegTsMapOffset) {
+      if (!initPTS) {
+        parsingError = new Error('Missing initPTS for VTT MPEGTS');
+        return;
+      }
+      // If we have MPEGTS, offset = presentation time + discontinuity offset
+      cueOffset = webVttMpegTsMapOffset - vttCCs.presentationOffset;
+    }
+    const duration = cue.endTime - cue.startTime;
+    const startTime = normalizePts((cue.startTime + cueOffset - timestampMapLOCAL) * 90000, timeOffset * 90000) / 90000;
+    cue.startTime = Math.max(startTime, 0);
+    cue.endTime = Math.max(startTime + duration, 0);
+
+    //trim trailing webvtt block whitespaces
+    const text = cue.text.trim();
+
+    // Fix encoding of special characters
+    cue.text = decodeURIComponent(encodeURIComponent(text));
+
+    // If the cue was not assigned an id from the VTT file (line above the content), create one.
+    if (!cue.id) {
+      cue.id = generateCueId(cue.startTime, cue.endTime, text);
+    }
+    if (cue.endTime > 0) {
+      cues.push(cue);
+    }
+  };
+  parser.onparsingerror = function (error) {
+    parsingError = error;
+  };
+  parser.onflush = function () {
+    if (parsingError) {
+      errorCallBack(parsingError);
+      return;
+    }
+    callBack(cues);
+  };
+
+  // Go through contents line by line.
+  vttLines.forEach(line => {
+    if (inHeader) {
+      // Look for X-TIMESTAMP-MAP in header.
+      if (startsWith(line, 'X-TIMESTAMP-MAP=')) {
+        // Once found, no more are allowed anyway, so stop searching.
+        inHeader = false;
+        // Extract LOCAL and MPEGTS.
+        line.slice(16).split(',').forEach(timestamp => {
+          if (startsWith(timestamp, 'LOCAL:')) {
+            cueTime = timestamp.slice(6);
+          } else if (startsWith(timestamp, 'MPEGTS:')) {
+            timestampMapMPEGTS = parseInt(timestamp.slice(7));
+          }
+        });
+        try {
+          // Convert cue time to seconds
+          timestampMapLOCAL = cueString2millis(cueTime) / 1000;
+        } catch (error) {
+          parsingError = error;
+        }
+        // Return without parsing X-TIMESTAMP-MAP line.
+        return;
+      } else if (line === '') {
+        inHeader = false;
+      }
+    }
+    // Parse line by default.
+    parser.parse(line + '\n');
+  });
+  parser.flush();
+}
+
+const IMSC1_CODEC = 'stpp.ttml.im1t';
+
+// Time format: h:m:s:frames(.subframes)
+const HMSF_REGEX = /^(\d{2,}):(\d{2}):(\d{2}):(\d{2})\.?(\d+)?$/;
+
+// Time format: hours, minutes, seconds, milliseconds, frames, ticks
+const TIME_UNIT_REGEX = /^(\d*(?:\.\d*)?)(h|m|s|ms|f|t)$/;
+const textAlignToLineAlign = {
+  left: 'start',
+  center: 'center',
+  right: 'end',
+  start: 'start',
+  end: 'end'
+};
+function parseIMSC1(payload, initPTS, callBack, errorCallBack) {
+  const results = findBox(new Uint8Array(payload), ['mdat']);
+  if (results.length === 0) {
+    errorCallBack(new Error('Could not parse IMSC1 mdat'));
+    return;
+  }
+  const ttmlList = results.map(mdat => utf8ArrayToStr(mdat));
+  const syncTime = toTimescaleFromScale(initPTS.baseTime, 1, initPTS.timescale);
+  try {
+    ttmlList.forEach(ttml => callBack(parseTTML(ttml, syncTime)));
+  } catch (error) {
+    errorCallBack(error);
+  }
+}
+function parseTTML(ttml, syncTime) {
+  const parser = new DOMParser();
+  const xmlDoc = parser.parseFromString(ttml, 'text/xml');
+  const tt = xmlDoc.getElementsByTagName('tt')[0];
+  if (!tt) {
+    throw new Error('Invalid ttml');
+  }
+  const defaultRateInfo = {
+    frameRate: 30,
+    subFrameRate: 1,
+    frameRateMultiplier: 0,
+    tickRate: 0
+  };
+  const rateInfo = Object.keys(defaultRateInfo).reduce((result, key) => {
+    result[key] = tt.getAttribute(`ttp:${key}`) || defaultRateInfo[key];
+    return result;
+  }, {});
+  const trim = tt.getAttribute('xml:space') !== 'preserve';
+  const styleElements = collectionToDictionary(getElementCollection(tt, 'styling', 'style'));
+  const regionElements = collectionToDictionary(getElementCollection(tt, 'layout', 'region'));
+  const cueElements = getElementCollection(tt, 'body', '[begin]');
+  return [].map.call(cueElements, cueElement => {
+    const cueText = getTextContent(cueElement, trim);
+    if (!cueText || !cueElement.hasAttribute('begin')) {
+      return null;
+    }
+    const startTime = parseTtmlTime(cueElement.getAttribute('begin'), rateInfo);
+    const duration = parseTtmlTime(cueElement.getAttribute('dur'), rateInfo);
+    let endTime = parseTtmlTime(cueElement.getAttribute('end'), rateInfo);
+    if (startTime === null) {
+      throw timestampParsingError(cueElement);
+    }
+    if (endTime === null) {
+      if (duration === null) {
+        throw timestampParsingError(cueElement);
+      }
+      endTime = startTime + duration;
+    }
+    const cue = new VTTCue(startTime - syncTime, endTime - syncTime, cueText);
+    cue.id = generateCueId(cue.startTime, cue.endTime, cue.text);
+    const region = regionElements[cueElement.getAttribute('region')];
+    const style = styleElements[cueElement.getAttribute('style')];
+
+    // Apply styles to cue
+    const styles = getTtmlStyles(region, style, styleElements);
+    const {
+      textAlign
+    } = styles;
+    if (textAlign) {
+      // cue.positionAlign not settable in FF~2016
+      const lineAlign = textAlignToLineAlign[textAlign];
+      if (lineAlign) {
+        cue.lineAlign = lineAlign;
+      }
+      cue.align = textAlign;
+    }
+    _extends(cue, styles);
+    return cue;
+  }).filter(cue => cue !== null);
+}
+function getElementCollection(fromElement, parentName, childName) {
+  const parent = fromElement.getElementsByTagName(parentName)[0];
+  if (parent) {
+    return [].slice.call(parent.querySelectorAll(childName));
+  }
+  return [];
+}
+function collectionToDictionary(elementsWithId) {
+  return elementsWithId.reduce((dict, element) => {
+    const id = element.getAttribute('xml:id');
+    if (id) {
+      dict[id] = element;
+    }
+    return dict;
+  }, {});
+}
+function getTextContent(element, trim) {
+  return [].slice.call(element.childNodes).reduce((str, node, i) => {
+    var _node$childNodes;
+    if (node.nodeName === 'br' && i) {
+      return str + '\n';
+    }
+    if ((_node$childNodes = node.childNodes) != null && _node$childNodes.length) {
+      return getTextContent(node, trim);
+    } else if (trim) {
+      return str + node.textContent.trim().replace(/\s+/g, ' ');
+    }
+    return str + node.textContent;
+  }, '');
+}
+function getTtmlStyles(region, style, styleElements) {
+  const ttsNs = 'http://www.w3.org/ns/ttml#styling';
+  let regionStyle = null;
+  const styleAttributes = ['displayAlign', 'textAlign', 'color', 'backgroundColor', 'fontSize', 'fontFamily'
+  // 'fontWeight',
+  // 'lineHeight',
+  // 'wrapOption',
+  // 'fontStyle',
+  // 'direction',
+  // 'writingMode'
+  ];
+  const regionStyleName = region != null && region.hasAttribute('style') ? region.getAttribute('style') : null;
+  if (regionStyleName && styleElements.hasOwnProperty(regionStyleName)) {
+    regionStyle = styleElements[regionStyleName];
+  }
+  return styleAttributes.reduce((styles, name) => {
+    const value = getAttributeNS(style, ttsNs, name) || getAttributeNS(region, ttsNs, name) || getAttributeNS(regionStyle, ttsNs, name);
+    if (value) {
+      styles[name] = value;
+    }
+    return styles;
+  }, {});
+}
+function getAttributeNS(element, ns, name) {
+  if (!element) {
+    return null;
+  }
+  return element.hasAttributeNS(ns, name) ? element.getAttributeNS(ns, name) : null;
+}
+function timestampParsingError(node) {
+  return new Error(`Could not parse ttml timestamp ${node}`);
+}
+function parseTtmlTime(timeAttributeValue, rateInfo) {
+  if (!timeAttributeValue) {
+    return null;
+  }
+  let seconds = parseTimeStamp(timeAttributeValue);
+  if (seconds === null) {
+    if (HMSF_REGEX.test(timeAttributeValue)) {
+      seconds = parseHoursMinutesSecondsFrames(timeAttributeValue, rateInfo);
+    } else if (TIME_UNIT_REGEX.test(timeAttributeValue)) {
+      seconds = parseTimeUnits(timeAttributeValue, rateInfo);
+    }
+  }
+  return seconds;
+}
+function parseHoursMinutesSecondsFrames(timeAttributeValue, rateInfo) {
+  const m = HMSF_REGEX.exec(timeAttributeValue);
+  const frames = (m[4] | 0) + (m[5] | 0) / rateInfo.subFrameRate;
+  return (m[1] | 0) * 3600 + (m[2] | 0) * 60 + (m[3] | 0) + frames / rateInfo.frameRate;
+}
+function parseTimeUnits(timeAttributeValue, rateInfo) {
+  const m = TIME_UNIT_REGEX.exec(timeAttributeValue);
+  const value = Number(m[1]);
+  const unit = m[2];
+  switch (unit) {
+    case 'h':
+      return value * 3600;
+    case 'm':
+      return value * 60;
+    case 'ms':
+      return value * 1000;
+    case 'f':
+      return value / rateInfo.frameRate;
+    case 't':
+      return value / rateInfo.tickRate;
+  }
+  return value;
+}
+
+class OutputFilter {
+  constructor(timelineController, trackName) {
+    this.timelineController = void 0;
+    this.cueRanges = [];
+    this.trackName = void 0;
+    this.startTime = null;
+    this.endTime = null;
+    this.screen = null;
+    this.timelineController = timelineController;
+    this.trackName = trackName;
+  }
+  dispatchCue() {
+    if (this.startTime === null) {
+      return;
+    }
+    this.timelineController.addCues(this.trackName, this.startTime, this.endTime, this.screen, this.cueRanges);
+    this.startTime = null;
+  }
+  newCue(startTime, endTime, screen) {
+    if (this.startTime === null || this.startTime > startTime) {
+      this.startTime = startTime;
+    }
+    this.endTime = endTime;
+    this.screen = screen;
+    this.timelineController.createCaptionsTrack(this.trackName);
+  }
+  reset() {
+    this.cueRanges = [];
+    this.startTime = null;
+  }
+}
+
+class TimelineController {
+  constructor(hls) {
+    this.hls = void 0;
+    this.media = null;
+    this.config = void 0;
+    this.enabled = true;
+    this.Cues = void 0;
+    this.textTracks = [];
+    this.tracks = [];
+    this.initPTS = [];
+    this.unparsedVttFrags = [];
+    this.captionsTracks = {};
+    this.nonNativeCaptionsTracks = {};
+    this.cea608Parser1 = void 0;
+    this.cea608Parser2 = void 0;
+    this.lastCc = -1;
+    // Last video (CEA-608) fragment CC
+    this.lastSn = -1;
+    // Last video (CEA-608) fragment MSN
+    this.lastPartIndex = -1;
+    // Last video (CEA-608) fragment Part Index
+    this.prevCC = -1;
+    // Last subtitle fragment CC
+    this.vttCCs = newVTTCCs();
+    this.captionsProperties = void 0;
+    this.hls = hls;
+    this.config = hls.config;
+    this.Cues = hls.config.cueHandler;
+    this.captionsProperties = {
+      textTrack1: {
+        label: this.config.captionsTextTrack1Label,
+        languageCode: this.config.captionsTextTrack1LanguageCode
+      },
+      textTrack2: {
+        label: this.config.captionsTextTrack2Label,
+        languageCode: this.config.captionsTextTrack2LanguageCode
+      },
+      textTrack3: {
+        label: this.config.captionsTextTrack3Label,
+        languageCode: this.config.captionsTextTrack3LanguageCode
+      },
+      textTrack4: {
+        label: this.config.captionsTextTrack4Label,
+        languageCode: this.config.captionsTextTrack4LanguageCode
+      }
+    };
+    hls.on(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.on(Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
+    hls.on(Events.FRAG_LOADING, this.onFragLoading, this);
+    hls.on(Events.FRAG_LOADED, this.onFragLoaded, this);
+    hls.on(Events.FRAG_PARSING_USERDATA, this.onFragParsingUserdata, this);
+    hls.on(Events.FRAG_DECRYPTED, this.onFragDecrypted, this);
+    hls.on(Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
+    hls.on(Events.SUBTITLE_TRACKS_CLEARED, this.onSubtitleTracksCleared, this);
+    hls.on(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+  }
+  destroy() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+    hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.off(Events.SUBTITLE_TRACKS_UPDATED, this.onSubtitleTracksUpdated, this);
+    hls.off(Events.FRAG_LOADING, this.onFragLoading, this);
+    hls.off(Events.FRAG_LOADED, this.onFragLoaded, this);
+    hls.off(Events.FRAG_PARSING_USERDATA, this.onFragParsingUserdata, this);
+    hls.off(Events.FRAG_DECRYPTED, this.onFragDecrypted, this);
+    hls.off(Events.INIT_PTS_FOUND, this.onInitPtsFound, this);
+    hls.off(Events.SUBTITLE_TRACKS_CLEARED, this.onSubtitleTracksCleared, this);
+    hls.off(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+    // @ts-ignore
+    this.hls = this.config = this.media = null;
+    this.cea608Parser1 = this.cea608Parser2 = undefined;
+  }
+  initCea608Parsers() {
+    const channel1 = new OutputFilter(this, 'textTrack1');
+    const channel2 = new OutputFilter(this, 'textTrack2');
+    const channel3 = new OutputFilter(this, 'textTrack3');
+    const channel4 = new OutputFilter(this, 'textTrack4');
+    this.cea608Parser1 = new Cea608Parser(1, channel1, channel2);
+    this.cea608Parser2 = new Cea608Parser(3, channel3, channel4);
+  }
+  addCues(trackName, startTime, endTime, screen, cueRanges) {
+    // skip cues which overlap more than 50% with previously parsed time ranges
+    let merged = false;
+    for (let i = cueRanges.length; i--;) {
+      const cueRange = cueRanges[i];
+      const overlap = intersection(cueRange[0], cueRange[1], startTime, endTime);
+      if (overlap >= 0) {
+        cueRange[0] = Math.min(cueRange[0], startTime);
+        cueRange[1] = Math.max(cueRange[1], endTime);
+        merged = true;
+        if (overlap / (endTime - startTime) > 0.5) {
+          return;
+        }
+      }
+    }
+    if (!merged) {
+      cueRanges.push([startTime, endTime]);
+    }
+    if (this.config.renderTextTracksNatively) {
+      const track = this.captionsTracks[trackName];
+      this.Cues.newCue(track, startTime, endTime, screen);
+    } else {
+      const cues = this.Cues.newCue(null, startTime, endTime, screen);
+      this.hls.trigger(Events.CUES_PARSED, {
+        type: 'captions',
+        cues,
+        track: trackName
+      });
+    }
+  }
+
+  // Triggered when an initial PTS is found; used for synchronisation of WebVTT.
+  onInitPtsFound(event, {
+    frag,
+    id,
+    initPTS,
+    timescale,
+    trackId
+  }) {
+    const {
+      unparsedVttFrags
+    } = this;
+    if (id === PlaylistLevelType.MAIN) {
+      this.initPTS[frag.cc] = {
+        baseTime: initPTS,
+        timescale,
+        trackId
+      };
+    }
+
+    // Due to asynchronous processing, initial PTS may arrive later than the first VTT fragments are loaded.
+    // Parse any unparsed fragments upon receiving the initial PTS.
+    if (unparsedVttFrags.length) {
+      this.unparsedVttFrags = [];
+      unparsedVttFrags.forEach(data => {
+        if (this.initPTS[data.frag.cc]) {
+          this.onFragLoaded(Events.FRAG_LOADED, data);
+        } else {
+          this.hls.trigger(Events.SUBTITLE_FRAG_PROCESSED, {
+            success: false,
+            frag: data.frag,
+            error: new Error('Subtitle discontinuity domain does not match main')
+          });
+        }
+      });
+    }
+  }
+  getExistingTrack(label, language) {
+    const {
+      media
+    } = this;
+    if (media) {
+      for (let i = 0; i < media.textTracks.length; i++) {
+        const textTrack = media.textTracks[i];
+        if (canReuseVttTextTrack(textTrack, {
+          name: label,
+          lang: language,
+          characteristics: 'transcribes-spoken-dialog,describes-music-and-sound'})) {
+          return textTrack;
+        }
+      }
+    }
+    return null;
+  }
+  createCaptionsTrack(trackName) {
+    if (this.config.renderTextTracksNatively) {
+      this.createNativeTrack(trackName);
+    } else {
+      this.createNonNativeTrack(trackName);
+    }
+  }
+  createNativeTrack(trackName) {
+    if (this.captionsTracks[trackName]) {
+      return;
+    }
+    const {
+      captionsProperties,
+      captionsTracks,
+      media
+    } = this;
+    const {
+      label,
+      languageCode
+    } = captionsProperties[trackName];
+    // Enable reuse of existing text track.
+    const existingTrack = this.getExistingTrack(label, languageCode);
+    if (!existingTrack) {
+      const textTrack = this.createTextTrack('captions', label, languageCode);
+      if (textTrack) {
+        // Set a special property on the track so we know it's managed by Hls.js
+        textTrack[trackName] = true;
+        captionsTracks[trackName] = textTrack;
+      }
+    } else {
+      captionsTracks[trackName] = existingTrack;
+      clearCurrentCues(captionsTracks[trackName]);
+      sendAddTrackEvent(captionsTracks[trackName], media);
+    }
+  }
+  createNonNativeTrack(trackName) {
+    if (this.nonNativeCaptionsTracks[trackName]) {
+      return;
+    }
+    // Create a list of a single track for the provider to consume
+    const trackProperties = this.captionsProperties[trackName];
+    if (!trackProperties) {
+      return;
+    }
+    const label = trackProperties.label;
+    const track = {
+      _id: trackName,
+      label,
+      kind: 'captions',
+      default: trackProperties.media ? !!trackProperties.media.default : false,
+      closedCaptions: trackProperties.media
+    };
+    this.nonNativeCaptionsTracks[trackName] = track;
+    this.hls.trigger(Events.NON_NATIVE_TEXT_TRACKS_FOUND, {
+      tracks: [track]
+    });
+  }
+  createTextTrack(kind, label, lang) {
+    const media = this.media;
+    if (!media) {
+      return;
+    }
+    return media.addTextTrack(kind, label, lang);
+  }
+  onMediaAttaching(event, data) {
+    this.media = data.media;
+    if (!data.mediaSource) {
+      this._cleanTracks();
+    }
+  }
+  onMediaDetaching(event, data) {
+    const transferringMedia = !!data.transferMedia;
+    this.media = null;
+    if (transferringMedia) {
+      return;
+    }
+    const {
+      captionsTracks
+    } = this;
+    Object.keys(captionsTracks).forEach(trackName => {
+      clearCurrentCues(captionsTracks[trackName]);
+      delete captionsTracks[trackName];
+    });
+    this.nonNativeCaptionsTracks = {};
+  }
+  onManifestLoading() {
+    // Detect discontinuity in video fragment (CEA-608) parsing
+    this.lastCc = -1;
+    this.lastSn = -1;
+    this.lastPartIndex = -1;
+    // Detect discontinuity in subtitle manifests
+    this.prevCC = -1;
+    this.vttCCs = newVTTCCs();
+    // Reset tracks
+    this._cleanTracks();
+    this.tracks = [];
+    this.captionsTracks = {};
+    this.nonNativeCaptionsTracks = {};
+    this.textTracks = [];
+    this.unparsedVttFrags = [];
+    this.initPTS = [];
+    if (this.cea608Parser1 && this.cea608Parser2) {
+      this.cea608Parser1.reset();
+      this.cea608Parser2.reset();
+    }
+  }
+  _cleanTracks() {
+    // clear outdated subtitles
+    const {
+      media
+    } = this;
+    if (!media) {
+      return;
+    }
+    const textTracks = media.textTracks;
+    if (textTracks) {
+      for (let i = 0; i < textTracks.length; i++) {
+        clearCurrentCues(textTracks[i]);
+      }
+    }
+  }
+  onSubtitleTracksUpdated(event, data) {
+    const tracks = data.subtitleTracks || [];
+    const hasIMSC1 = tracks.some(track => track.textCodec === IMSC1_CODEC);
+    if (this.config.enableWebVTT || hasIMSC1 && this.config.enableIMSC1) {
+      const listIsIdentical = subtitleOptionsIdentical(this.tracks, tracks);
+      if (listIsIdentical) {
+        this.tracks = tracks;
+        return;
+      }
+      this.textTracks = [];
+      this.tracks = tracks;
+      if (this.config.renderTextTracksNatively) {
+        const media = this.media;
+        const inUseTracks = media ? filterSubtitleTracks(media.textTracks) : null;
+        this.tracks.forEach((track, index) => {
+          // Reuse tracks with the same label and lang, but do not reuse 608/708 tracks
+          let textTrack;
+          if (inUseTracks) {
+            let inUseTrack = null;
+            for (let i = 0; i < inUseTracks.length; i++) {
+              if (inUseTracks[i] && canReuseVttTextTrack(inUseTracks[i], track)) {
+                inUseTrack = inUseTracks[i];
+                inUseTracks[i] = null;
+                break;
+              }
+            }
+            if (inUseTrack) {
+              textTrack = inUseTrack;
+            }
+          }
+          if (textTrack) {
+            clearCurrentCues(textTrack);
+          } else {
+            const textTrackKind = captionsOrSubtitlesFromCharacteristics(track);
+            textTrack = this.createTextTrack(textTrackKind, track.name, track.lang);
+            if (textTrack) {
+              textTrack.mode = 'disabled';
+            }
+          }
+          if (textTrack) {
+            this.textTracks.push(textTrack);
+          }
+        });
+        // Warn when video element has captions or subtitle TextTracks carried over from another source
+        if (inUseTracks != null && inUseTracks.length) {
+          const unusedTextTracks = inUseTracks.filter(t => t !== null).map(t => t.label);
+          if (unusedTextTracks.length) {
+            this.hls.logger.warn(`Media element contains unused subtitle tracks: ${unusedTextTracks.join(', ')}. Replace media element for each source to clear TextTracks and captions menu.`);
+          }
+        }
+      } else if (this.tracks.length) {
+        // Create a list of tracks for the provider to consume
+        const tracksList = this.tracks.map(track => {
+          return {
+            label: track.name,
+            kind: track.type.toLowerCase(),
+            default: track.default,
+            subtitleTrack: track
+          };
+        });
+        this.hls.trigger(Events.NON_NATIVE_TEXT_TRACKS_FOUND, {
+          tracks: tracksList
+        });
+      }
+    }
+  }
+  onManifestLoaded(event, data) {
+    if (this.config.enableCEA708Captions && data.captions) {
+      data.captions.forEach(captionsTrack => {
+        const instreamIdMatch = /(?:CC|SERVICE)([1-4])/.exec(captionsTrack.instreamId);
+        if (!instreamIdMatch) {
+          return;
+        }
+        const trackName = `textTrack${instreamIdMatch[1]}`;
+        const trackProperties = this.captionsProperties[trackName];
+        if (!trackProperties) {
+          return;
+        }
+        trackProperties.label = captionsTrack.name;
+        if (captionsTrack.lang) {
+          // optional attribute
+          trackProperties.languageCode = captionsTrack.lang;
+        }
+        trackProperties.media = captionsTrack;
+      });
+    }
+  }
+  closedCaptionsForLevel(frag) {
+    const level = this.hls.levels[frag.level];
+    return level == null ? void 0 : level.attrs['CLOSED-CAPTIONS'];
+  }
+  onFragLoading(event, data) {
+    // if this frag isn't contiguous, clear the parser so cues with bad start/end times aren't added to the textTrack
+    if (this.enabled && data.frag.type === PlaylistLevelType.MAIN) {
+      var _data$part$index, _data$part;
+      const {
+        cea608Parser1,
+        cea608Parser2,
+        lastSn
+      } = this;
+      const {
+        cc,
+        sn
+      } = data.frag;
+      const partIndex = (_data$part$index = (_data$part = data.part) == null ? void 0 : _data$part.index) != null ? _data$part$index : -1;
+      if (cea608Parser1 && cea608Parser2) {
+        if (sn !== lastSn + 1 || sn === lastSn && partIndex !== this.lastPartIndex + 1 || cc !== this.lastCc) {
+          cea608Parser1.reset();
+          cea608Parser2.reset();
+        }
+      }
+      this.lastCc = cc;
+      this.lastSn = sn;
+      this.lastPartIndex = partIndex;
+    }
+  }
+  onFragLoaded(event, data) {
+    const {
+      frag,
+      payload
+    } = data;
+    if (frag.type === PlaylistLevelType.SUBTITLE) {
+      // If fragment is subtitle type, parse as WebVTT.
+      if (payload.byteLength) {
+        const decryptData = frag.decryptdata;
+        // fragment after decryption has a stats object
+        const decrypted = 'stats' in data;
+        // If the subtitles are not encrypted, parse VTTs now. Otherwise, we need to wait.
+        if (decryptData == null || !decryptData.encrypted || decrypted) {
+          const trackPlaylistMedia = this.tracks[frag.level];
+          const vttCCs = this.vttCCs;
+          if (!vttCCs[frag.cc]) {
+            vttCCs[frag.cc] = {
+              start: frag.start,
+              prevCC: this.prevCC,
+              new: true
+            };
+            this.prevCC = frag.cc;
+          }
+          if (trackPlaylistMedia && trackPlaylistMedia.textCodec === IMSC1_CODEC) {
+            this._parseIMSC1(frag, payload);
+          } else {
+            this._parseVTTs(data);
+          }
+        }
+      } else {
+        // In case there is no payload, finish unsuccessfully.
+        this.hls.trigger(Events.SUBTITLE_FRAG_PROCESSED, {
+          success: false,
+          frag,
+          error: new Error('Empty subtitle payload')
+        });
+      }
+    }
+  }
+  _parseIMSC1(frag, payload) {
+    const hls = this.hls;
+    parseIMSC1(payload, this.initPTS[frag.cc], cues => {
+      this._appendCues(cues, frag.level);
+      hls.trigger(Events.SUBTITLE_FRAG_PROCESSED, {
+        success: true,
+        frag: frag
+      });
+    }, error => {
+      hls.logger.log(`Failed to parse IMSC1: ${error}`);
+      hls.trigger(Events.SUBTITLE_FRAG_PROCESSED, {
+        success: false,
+        frag: frag,
+        error
+      });
+    });
+  }
+  _parseVTTs(data) {
+    var _frag$initSegment;
+    const {
+      frag,
+      payload
+    } = data;
+    // We need an initial synchronisation PTS. Store fragments as long as none has arrived
+    const {
+      initPTS,
+      unparsedVttFrags
+    } = this;
+    const maxAvCC = initPTS.length - 1;
+    if (!initPTS[frag.cc] && maxAvCC === -1) {
+      unparsedVttFrags.push(data);
+      return;
+    }
+    const hls = this.hls;
+    // Parse the WebVTT file contents.
+    const payloadWebVTT = (_frag$initSegment = frag.initSegment) != null && _frag$initSegment.data ? appendUint8Array(frag.initSegment.data, new Uint8Array(payload)).buffer : payload;
+    parseWebVTT(payloadWebVTT, this.initPTS[frag.cc], this.vttCCs, frag.cc, frag.start, cues => {
+      this._appendCues(cues, frag.level);
+      hls.trigger(Events.SUBTITLE_FRAG_PROCESSED, {
+        success: true,
+        frag: frag
+      });
+    }, error => {
+      const missingInitPTS = error.message === 'Missing initPTS for VTT MPEGTS';
+      if (missingInitPTS) {
+        unparsedVttFrags.push(data);
+      } else {
+        this._fallbackToIMSC1(frag, payload);
+      }
+      // Something went wrong while parsing. Trigger event with success false.
+      hls.logger.log(`Failed to parse VTT cue: ${error}`);
+      if (missingInitPTS && maxAvCC > frag.cc) {
+        return;
+      }
+      hls.trigger(Events.SUBTITLE_FRAG_PROCESSED, {
+        success: false,
+        frag: frag,
+        error
+      });
+    });
+  }
+  _fallbackToIMSC1(frag, payload) {
+    // If textCodec is unknown, try parsing as IMSC1. Set textCodec based on the result
+    const trackPlaylistMedia = this.tracks[frag.level];
+    if (!trackPlaylistMedia.textCodec) {
+      parseIMSC1(payload, this.initPTS[frag.cc], () => {
+        trackPlaylistMedia.textCodec = IMSC1_CODEC;
+        this._parseIMSC1(frag, payload);
+      }, () => {
+        trackPlaylistMedia.textCodec = 'wvtt';
+      });
+    }
+  }
+  _appendCues(cues, fragLevel) {
+    const hls = this.hls;
+    if (this.config.renderTextTracksNatively) {
+      const textTrack = this.textTracks[fragLevel];
+      // WebVTTParser.parse is an async method and if the currently selected text track mode is set to "disabled"
+      // before parsing is done then don't try to access currentTrack.cues.getCueById as cues will be null
+      // and trying to access getCueById method of cues will throw an exception
+      // Because we check if the mode is disabled, we can force check `cues` below. They can't be null.
+      if (!textTrack || textTrack.mode === 'disabled') {
+        return;
+      }
+      cues.forEach(cue => addCueToTrack(textTrack, cue));
+    } else {
+      const currentTrack = this.tracks[fragLevel];
+      if (!currentTrack) {
+        return;
+      }
+      const track = currentTrack.default ? 'default' : 'subtitles' + fragLevel;
+      hls.trigger(Events.CUES_PARSED, {
+        type: 'subtitles',
+        cues,
+        track
+      });
+    }
+  }
+  onFragDecrypted(event, data) {
+    const {
+      frag
+    } = data;
+    if (frag.type === PlaylistLevelType.SUBTITLE) {
+      this.onFragLoaded(Events.FRAG_LOADED, data);
+    }
+  }
+  onSubtitleTracksCleared() {
+    this.tracks = [];
+    this.captionsTracks = {};
+  }
+  onFragParsingUserdata(event, data) {
+    if (!this.enabled || !this.config.enableCEA708Captions) {
+      return;
+    }
+    const {
+      frag,
+      samples
+    } = data;
+    if (frag.type === PlaylistLevelType.MAIN && this.closedCaptionsForLevel(frag) === 'NONE') {
+      return;
+    }
+    // If the event contains captions (found in the bytes property), push all bytes into the parser immediately
+    // It will create the proper timestamps based on the PTS value
+    for (let i = 0; i < samples.length; i++) {
+      const ccBytes = samples[i].bytes;
+      if (ccBytes) {
+        if (!this.cea608Parser1) {
+          this.initCea608Parsers();
+        }
+        const ccdatas = this.extractCea608Data(ccBytes);
+        this.cea608Parser1.addData(samples[i].pts, ccdatas[0]);
+        this.cea608Parser2.addData(samples[i].pts, ccdatas[1]);
+      }
+    }
+  }
+  onBufferFlushing(event, {
+    startOffset,
+    endOffset,
+    endOffsetSubtitles,
+    type
+  }) {
+    const {
+      media
+    } = this;
+    if (!media || media.currentTime < endOffset) {
+      return;
+    }
+    // Clear 608 caption cues from the captions TextTracks when the video back buffer is flushed
+    // Forward cues are never removed because we can loose streamed 608 content from recent fragments
+    if (!type || type === 'video') {
+      const {
+        captionsTracks
+      } = this;
+      Object.keys(captionsTracks).forEach(trackName => removeCuesInRange(captionsTracks[trackName], startOffset, endOffset));
+    }
+    if (this.config.renderTextTracksNatively) {
+      // Clear VTT/IMSC1 subtitle cues from the subtitle TextTracks when the back buffer is flushed
+      if (startOffset === 0 && endOffsetSubtitles !== undefined) {
+        const {
+          textTracks
+        } = this;
+        Object.keys(textTracks).forEach(trackName => removeCuesInRange(textTracks[trackName], startOffset, endOffsetSubtitles));
+      }
+    }
+  }
+  extractCea608Data(byteArray) {
+    const actualCCBytes = [[], []];
+    const count = byteArray[0] & 0x1f;
+    let position = 2;
+    for (let j = 0; j < count; j++) {
+      const tmpByte = byteArray[position++];
+      const ccbyte1 = 0x7f & byteArray[position++];
+      const ccbyte2 = 0x7f & byteArray[position++];
+      if (ccbyte1 === 0 && ccbyte2 === 0) {
+        continue;
+      }
+      const ccValid = (0x04 & tmpByte) !== 0; // Support all four channels
+      if (ccValid) {
+        const ccType = 0x03 & tmpByte;
+        if (0x00 /* CEA608 field1*/ === ccType || 0x01 /* CEA608 field2*/ === ccType) {
+          // Exclude CEA708 CC data.
+          actualCCBytes[ccType].push(ccbyte1);
+          actualCCBytes[ccType].push(ccbyte2);
+        }
+      }
+    }
+    return actualCCBytes;
+  }
+}
+function captionsOrSubtitlesFromCharacteristics(track) {
+  if (track.characteristics) {
+    if (/transcribes-spoken-dialog/gi.test(track.characteristics) && /describes-music-and-sound/gi.test(track.characteristics)) {
+      return 'captions';
+    }
+  }
+  return 'subtitles';
+}
+function canReuseVttTextTrack(inUseTrack, manifestTrack) {
+  return !!inUseTrack && inUseTrack.kind === captionsOrSubtitlesFromCharacteristics(manifestTrack) && subtitleTrackMatchesTextTrack(manifestTrack, inUseTrack);
+}
+function intersection(x1, x2, y1, y2) {
+  return Math.min(x2, y2) - Math.max(x1, y1);
+}
+function newVTTCCs() {
+  return {
+    ccOffset: 0,
+    presentationOffset: 0,
+    0: {
+      start: 0,
+      prevCC: -1,
+      new: true
+    }
+  };
+}
+
+const WHITESPACE_CHAR = /\s/;
+const Cues = {
+  newCue(track, startTime, endTime, captionScreen) {
+    const result = [];
+    let row;
+    // the type data states this is VTTCue, but it can potentially be a TextTrackCue on old browsers
+    let cue;
+    let indenting;
+    let indent;
+    let text;
+    const Cue = self.VTTCue || self.TextTrackCue;
+    for (let r = 0; r < captionScreen.rows.length; r++) {
+      row = captionScreen.rows[r];
+      indenting = true;
+      indent = 0;
+      text = '';
+      if (!row.isEmpty()) {
+        var _track$cues;
+        for (let c = 0; c < row.chars.length; c++) {
+          if (WHITESPACE_CHAR.test(row.chars[c].uchar) && indenting) {
+            indent++;
+          } else {
+            text += row.chars[c].uchar;
+            indenting = false;
+          }
+        }
+        // To be used for cleaning-up orphaned roll-up captions
+        row.cueStartTime = startTime;
+
+        // Give a slight bump to the endTime if it's equal to startTime to avoid a SyntaxError in IE
+        if (startTime === endTime) {
+          endTime += 0.0001;
+        }
+        if (indent >= 16) {
+          indent--;
+        } else {
+          indent++;
+        }
+        const cueText = fixLineBreaks(text.trim());
+        const id = generateCueId(startTime, endTime, cueText);
+
+        // If this cue already exists in the track do not push it
+        if (!(track != null && (_track$cues = track.cues) != null && _track$cues.getCueById(id))) {
+          cue = new Cue(startTime, endTime, cueText);
+          cue.id = id;
+          cue.line = r + 1;
+          cue.align = 'left';
+          // Clamp the position between 10 and 80 percent (CEA-608 PAC indent code)
+          // https://dvcs.w3.org/hg/text-tracks/raw-file/default/608toVTT/608toVTT.html#positioning-in-cea-608
+          // Firefox throws an exception and captions break with out of bounds 0-100 values
+          cue.position = 10 + Math.min(80, Math.floor(indent * 8 / 32) * 10);
+          result.push(cue);
+        }
+      }
+    }
+    if (track && result.length) {
+      // Sort bottom cues in reverse order so that they render in line order when overlapping in Chrome
+      result.sort((cueA, cueB) => {
+        if (cueA.line === 'auto' || cueB.line === 'auto') {
+          return 0;
+        }
+        if (cueA.line > 8 && cueB.line > 8) {
+          return cueB.line - cueA.line;
+        }
+        return cueA.line - cueB.line;
+      });
+      result.forEach(cue => addCueToTrack(track, cue));
+    }
+    return result;
+  }
+};
+
+function fetchSupported() {
+  if (
+  // @ts-ignore
+  self.fetch && self.AbortController && self.ReadableStream && self.Request) {
+    try {
+      new self.ReadableStream({}); // eslint-disable-line no-new
+      return true;
+    } catch (e) {
+      /* noop */
+    }
+  }
+  return false;
+}
+const BYTERANGE = /(\d+)-(\d+)\/(\d+)/;
+class FetchLoader {
+  constructor(config) {
+    this.fetchSetup = void 0;
+    this.requestTimeout = void 0;
+    this.request = null;
+    this.response = null;
+    this.controller = void 0;
+    this.context = null;
+    this.config = null;
+    this.callbacks = null;
+    this.stats = void 0;
+    this.loader = null;
+    this.fetchSetup = config.fetchSetup || getRequest;
+    this.controller = new self.AbortController();
+    this.stats = new LoadStats();
+  }
+  destroy() {
+    this.loader = this.callbacks = this.context = this.config = this.request = null;
+    this.abortInternal();
+    this.response = null;
+    // @ts-ignore
+    this.fetchSetup = this.controller = this.stats = null;
+  }
+  abortInternal() {
+    if (this.controller && !this.stats.loading.end) {
+      this.stats.aborted = true;
+      this.controller.abort();
+    }
+  }
+  abort() {
+    var _this$callbacks;
+    this.abortInternal();
+    if ((_this$callbacks = this.callbacks) != null && _this$callbacks.onAbort) {
+      this.callbacks.onAbort(this.stats, this.context, this.response);
+    }
+  }
+  load(context, config, callbacks) {
+    const stats = this.stats;
+    if (stats.loading.start) {
+      throw new Error('Loader can only be used once.');
+    }
+    stats.loading.start = self.performance.now();
+    const initParams = getRequestParameters(context, this.controller.signal);
+    const isArrayBuffer = context.responseType === 'arraybuffer';
+    const LENGTH = isArrayBuffer ? 'byteLength' : 'length';
+    const {
+      maxTimeToFirstByteMs,
+      maxLoadTimeMs
+    } = config.loadPolicy;
+    this.context = context;
+    this.config = config;
+    this.callbacks = callbacks;
+    this.request = this.fetchSetup(context, initParams);
+    self.clearTimeout(this.requestTimeout);
+    config.timeout = maxTimeToFirstByteMs && isFiniteNumber(maxTimeToFirstByteMs) ? maxTimeToFirstByteMs : maxLoadTimeMs;
+    this.requestTimeout = self.setTimeout(() => {
+      if (this.callbacks) {
+        this.abortInternal();
+        this.callbacks.onTimeout(stats, context, this.response);
+      }
+    }, config.timeout);
+    const fetchPromise = isPromise(this.request) ? this.request.then(self.fetch) : self.fetch(this.request);
+    fetchPromise.then(response => {
+      var _this$callbacks2;
+      this.response = this.loader = response;
+      const first = Math.max(self.performance.now(), stats.loading.start);
+      self.clearTimeout(this.requestTimeout);
+      config.timeout = maxLoadTimeMs;
+      this.requestTimeout = self.setTimeout(() => {
+        if (this.callbacks) {
+          this.abortInternal();
+          this.callbacks.onTimeout(stats, context, this.response);
+        }
+      }, maxLoadTimeMs - (first - stats.loading.start));
+      if (!response.ok) {
+        const {
+          status,
+          statusText
+        } = response;
+        throw new FetchError(statusText || 'fetch, bad network response', status, response);
+      }
+      stats.loading.first = first;
+      stats.total = getContentLength(response.headers) || stats.total;
+      const onProgress = (_this$callbacks2 = this.callbacks) == null ? void 0 : _this$callbacks2.onProgress;
+      if (onProgress && isFiniteNumber(config.highWaterMark)) {
+        return this.loadProgressively(response, stats, context, config.highWaterMark, onProgress);
+      }
+      if (isArrayBuffer) {
+        return response.arrayBuffer();
+      }
+      if (context.responseType === 'json') {
+        return response.json();
+      }
+      return response.text();
+    }).then(responseData => {
+      var _this$callbacks3, _this$callbacks4;
+      const response = this.response;
+      if (!response) {
+        throw new Error('loader destroyed');
+      }
+      self.clearTimeout(this.requestTimeout);
+      stats.loading.end = Math.max(self.performance.now(), stats.loading.first);
+      const total = responseData[LENGTH];
+      if (total) {
+        stats.loaded = stats.total = total;
+      }
+      const loaderResponse = {
+        url: response.url,
+        data: responseData,
+        code: response.status
+      };
+      const onProgress = (_this$callbacks3 = this.callbacks) == null ? void 0 : _this$callbacks3.onProgress;
+      if (onProgress && !isFiniteNumber(config.highWaterMark)) {
+        onProgress(stats, context, responseData, response);
+      }
+      (_this$callbacks4 = this.callbacks) == null || _this$callbacks4.onSuccess(loaderResponse, stats, context, response);
+    }).catch(error => {
+      var _this$callbacks5;
+      self.clearTimeout(this.requestTimeout);
+      if (stats.aborted) {
+        return;
+      }
+      // CORS errors result in an undefined code. Set it to 0 here to align with XHR's behavior
+      // when destroying, 'error' itself can be undefined
+      const code = !error ? 0 : error.code || 0;
+      const text = !error ? null : error.message;
+      (_this$callbacks5 = this.callbacks) == null || _this$callbacks5.onError({
+        code,
+        text
+      }, context, error ? error.details : null, stats);
+    });
+  }
+  getCacheAge() {
+    let result = null;
+    if (this.response) {
+      const ageHeader = this.response.headers.get('age');
+      result = ageHeader ? parseFloat(ageHeader) : null;
+    }
+    return result;
+  }
+  getResponseHeader(name) {
+    return this.response ? this.response.headers.get(name) : null;
+  }
+  loadProgressively(response, stats, context, highWaterMark = 0, onProgress) {
+    const chunkCache = new ChunkCache();
+    const reader = response.body.getReader();
+    const pump = () => {
+      return reader.read().then(data => {
+        if (data.done) {
+          if (chunkCache.dataLength) {
+            onProgress(stats, context, chunkCache.flush().buffer, response);
+          }
+          return Promise.resolve(new ArrayBuffer(0));
+        }
+        const chunk = data.value;
+        const len = chunk.length;
+        stats.loaded += len;
+        if (len < highWaterMark || chunkCache.dataLength) {
+          // The current chunk is too small to to be emitted or the cache already has data
+          // Push it to the cache
+          chunkCache.push(chunk);
+          if (chunkCache.dataLength >= highWaterMark) {
+            // flush in order to join the typed arrays
+            onProgress(stats, context, chunkCache.flush().buffer, response);
+          }
+        } else {
+          // If there's nothing cached already, and the chache is large enough
+          // just emit the progress event
+          onProgress(stats, context, chunk.buffer, response);
+        }
+        return pump();
+      }).catch(() => {
+        /* aborted */
+        return Promise.reject();
+      });
+    };
+    return pump();
+  }
+}
+function getRequestParameters(context, signal) {
+  const initParams = {
+    method: 'GET',
+    mode: 'cors',
+    credentials: 'same-origin',
+    signal,
+    headers: new self.Headers(_extends({}, context.headers))
+  };
+  if (context.rangeEnd) {
+    initParams.headers.set('Range', 'bytes=' + context.rangeStart + '-' + String(context.rangeEnd - 1));
+  }
+  return initParams;
+}
+function getByteRangeLength(byteRangeHeader) {
+  const result = BYTERANGE.exec(byteRangeHeader);
+  if (result) {
+    return parseInt(result[2]) - parseInt(result[1]) + 1;
+  }
+}
+function getContentLength(headers) {
+  const contentRange = headers.get('Content-Range');
+  if (contentRange) {
+    const byteRangeLength = getByteRangeLength(contentRange);
+    if (isFiniteNumber(byteRangeLength)) {
+      return byteRangeLength;
+    }
+  }
+  const contentLength = headers.get('Content-Length');
+  if (contentLength) {
+    return parseInt(contentLength);
+  }
+}
+function getRequest(context, initParams) {
+  return new self.Request(context.url, initParams);
+}
+class FetchError extends Error {
+  constructor(message, code, details) {
+    super(message);
+    this.code = void 0;
+    this.details = void 0;
+    this.code = code;
+    this.details = details;
+  }
+}
+
+const AGE_HEADER_LINE_REGEX = /^age:\s*[\d.]+\s*$/im;
+class XhrLoader {
+  constructor(config) {
+    this.xhrSetup = void 0;
+    this.requestTimeout = void 0;
+    this.retryTimeout = void 0;
+    this.retryDelay = void 0;
+    this.config = null;
+    this.callbacks = null;
+    this.context = null;
+    this.loader = null;
+    this.stats = void 0;
+    this.xhrSetup = config ? config.xhrSetup || null : null;
+    this.stats = new LoadStats();
+    this.retryDelay = 0;
+  }
+  destroy() {
+    this.callbacks = null;
+    this.abortInternal();
+    this.loader = null;
+    this.config = null;
+    this.context = null;
+    this.xhrSetup = null;
+  }
+  abortInternal() {
+    const loader = this.loader;
+    self.clearTimeout(this.requestTimeout);
+    self.clearTimeout(this.retryTimeout);
+    if (loader) {
+      loader.onreadystatechange = null;
+      loader.onprogress = null;
+      if (loader.readyState !== 4) {
+        this.stats.aborted = true;
+        loader.abort();
+      }
+    }
+  }
+  abort() {
+    var _this$callbacks;
+    this.abortInternal();
+    if ((_this$callbacks = this.callbacks) != null && _this$callbacks.onAbort) {
+      this.callbacks.onAbort(this.stats, this.context, this.loader);
+    }
+  }
+  load(context, config, callbacks) {
+    if (this.stats.loading.start) {
+      throw new Error('Loader can only be used once.');
+    }
+    this.stats.loading.start = self.performance.now();
+    this.context = context;
+    this.config = config;
+    this.callbacks = callbacks;
+    this.loadInternal();
+  }
+  loadInternal() {
+    const {
+      config,
+      context
+    } = this;
+    if (!config || !context) {
+      return;
+    }
+    const xhr = this.loader = new self.XMLHttpRequest();
+    const stats = this.stats;
+    stats.loading.first = 0;
+    stats.loaded = 0;
+    stats.aborted = false;
+    const xhrSetup = this.xhrSetup;
+    if (xhrSetup) {
+      Promise.resolve().then(() => {
+        if (this.loader !== xhr || this.stats.aborted) return;
+        return xhrSetup(xhr, context.url);
+      }).catch(error => {
+        if (this.loader !== xhr || this.stats.aborted) return;
+        xhr.open('GET', context.url, true);
+        return xhrSetup(xhr, context.url);
+      }).then(() => {
+        if (this.loader !== xhr || this.stats.aborted) return;
+        this.openAndSendXhr(xhr, context, config);
+      }).catch(error => {
+        var _this$callbacks2;
+        // IE11 throws an exception on xhr.open if attempting to access an HTTP resource over HTTPS
+        (_this$callbacks2 = this.callbacks) == null || _this$callbacks2.onError({
+          code: xhr.status,
+          text: error.message
+        }, context, xhr, stats);
+        return;
+      });
+    } else {
+      this.openAndSendXhr(xhr, context, config);
+    }
+  }
+  openAndSendXhr(xhr, context, config) {
+    if (!xhr.readyState) {
+      xhr.open('GET', context.url, true);
+    }
+    const headers = context.headers;
+    const {
+      maxTimeToFirstByteMs,
+      maxLoadTimeMs
+    } = config.loadPolicy;
+    if (headers) {
+      for (const header in headers) {
+        xhr.setRequestHeader(header, headers[header]);
+      }
+    }
+    if (context.rangeEnd) {
+      xhr.setRequestHeader('Range', 'bytes=' + context.rangeStart + '-' + (context.rangeEnd - 1));
+    }
+    xhr.onreadystatechange = this.readystatechange.bind(this);
+    xhr.onprogress = this.loadprogress.bind(this);
+    xhr.responseType = context.responseType;
+    // setup timeout before we perform request
+    self.clearTimeout(this.requestTimeout);
+    config.timeout = maxTimeToFirstByteMs && isFiniteNumber(maxTimeToFirstByteMs) ? maxTimeToFirstByteMs : maxLoadTimeMs;
+    this.requestTimeout = self.setTimeout(this.loadtimeout.bind(this), config.timeout);
+    xhr.send();
+  }
+  readystatechange() {
+    const {
+      context,
+      loader: xhr,
+      stats
+    } = this;
+    if (!context || !xhr) {
+      return;
+    }
+    const readyState = xhr.readyState;
+    const config = this.config;
+
+    // don't proceed if xhr has been aborted
+    if (stats.aborted) {
+      return;
+    }
+
+    // >= HEADERS_RECEIVED
+    if (readyState >= 2) {
+      if (stats.loading.first === 0) {
+        stats.loading.first = Math.max(self.performance.now(), stats.loading.start);
+        // readyState >= 2 AND readyState !==4 (readyState = HEADERS_RECEIVED || LOADING) rearm timeout as xhr not finished yet
+        if (config.timeout !== config.loadPolicy.maxLoadTimeMs) {
+          self.clearTimeout(this.requestTimeout);
+          config.timeout = config.loadPolicy.maxLoadTimeMs;
+          this.requestTimeout = self.setTimeout(this.loadtimeout.bind(this), config.loadPolicy.maxLoadTimeMs - (stats.loading.first - stats.loading.start));
+        }
+      }
+      if (readyState === 4) {
+        self.clearTimeout(this.requestTimeout);
+        xhr.onreadystatechange = null;
+        xhr.onprogress = null;
+        const status = xhr.status;
+        // http status between 200 to 299 are all successful
+        const useResponseText = xhr.responseType === 'text' ? xhr.responseText : null;
+        if (status >= 200 && status < 300) {
+          const data = useResponseText != null ? useResponseText : xhr.response;
+          if (data != null) {
+            var _this$callbacks3, _this$callbacks4;
+            stats.loading.end = Math.max(self.performance.now(), stats.loading.first);
+            const len = xhr.responseType === 'arraybuffer' ? data.byteLength : data.length;
+            stats.loaded = stats.total = len;
+            stats.bwEstimate = stats.total * 8000 / (stats.loading.end - stats.loading.first);
+            const onProgress = (_this$callbacks3 = this.callbacks) == null ? void 0 : _this$callbacks3.onProgress;
+            if (onProgress) {
+              onProgress(stats, context, data, xhr);
+            }
+            const _response = {
+              url: xhr.responseURL,
+              data: data,
+              code: status
+            };
+            (_this$callbacks4 = this.callbacks) == null || _this$callbacks4.onSuccess(_response, stats, context, xhr);
+            return;
+          }
+        }
+
+        // Handle bad status or nullish response
+        const retryConfig = config.loadPolicy.errorRetry;
+        const retryCount = stats.retry;
+        // if max nb of retries reached or if http status between 400 and 499 (such error cannot be recovered, retrying is useless), return error
+        const response = {
+          url: context.url,
+          data: undefined,
+          code: status
+        };
+        if (shouldRetry(retryConfig, retryCount, false, response)) {
+          this.retry(retryConfig);
+        } else {
+          var _this$callbacks5;
+          logger.error(`${status} while loading ${context.url}`);
+          (_this$callbacks5 = this.callbacks) == null || _this$callbacks5.onError({
+            code: status,
+            text: xhr.statusText
+          }, context, xhr, stats);
+        }
+      }
+    }
+  }
+  loadtimeout() {
+    if (!this.config) return;
+    const retryConfig = this.config.loadPolicy.timeoutRetry;
+    const retryCount = this.stats.retry;
+    if (shouldRetry(retryConfig, retryCount, true)) {
+      this.retry(retryConfig);
+    } else {
+      var _this$context;
+      logger.warn(`timeout while loading ${(_this$context = this.context) == null ? void 0 : _this$context.url}`);
+      const callbacks = this.callbacks;
+      if (callbacks) {
+        this.abortInternal();
+        callbacks.onTimeout(this.stats, this.context, this.loader);
+      }
+    }
+  }
+  retry(retryConfig) {
+    const {
+      context,
+      stats
+    } = this;
+    this.retryDelay = getRetryDelay(retryConfig, stats.retry);
+    stats.retry++;
+    logger.warn(`${status ? 'HTTP Status ' + status : 'Timeout'} while loading ${context == null ? void 0 : context.url}, retrying ${stats.retry}/${retryConfig.maxNumRetry} in ${this.retryDelay}ms`);
+    // abort and reset internal state
+    this.abortInternal();
+    this.loader = null;
+    // schedule retry
+    self.clearTimeout(this.retryTimeout);
+    this.retryTimeout = self.setTimeout(this.loadInternal.bind(this), this.retryDelay);
+  }
+  loadprogress(event) {
+    const stats = this.stats;
+    stats.loaded = event.loaded;
+    if (event.lengthComputable) {
+      stats.total = event.total;
+    }
+  }
+  getCacheAge() {
+    let result = null;
+    if (this.loader && AGE_HEADER_LINE_REGEX.test(this.loader.getAllResponseHeaders())) {
+      const ageHeader = this.loader.getResponseHeader('age');
+      result = ageHeader ? parseFloat(ageHeader) : null;
+    }
+    return result;
+  }
+  getResponseHeader(name) {
+    if (this.loader && new RegExp(`^${name}:\\s*[\\d.]+\\s*$`, 'im').test(this.loader.getAllResponseHeaders())) {
+      return this.loader.getResponseHeader(name);
+    }
+    return null;
+  }
+}
+
+/**
+ * @deprecated use fragLoadPolicy.default
+ */
+
+/**
+ * @deprecated use manifestLoadPolicy.default and playlistLoadPolicy.default
+ */
+
+const defaultLoadPolicy = {
+  maxTimeToFirstByteMs: 8000,
+  maxLoadTimeMs: 20000,
+  timeoutRetry: null,
+  errorRetry: null
+};
+
+/**
+ * @ignore
+ * If possible, keep hlsDefaultConfig shallow
+ * It is cloned whenever a new Hls instance is created, by keeping the config
+ * shallow the properties are cloned, and we don't end up manipulating the default
+ */
+const hlsDefaultConfig = _objectSpread2(_objectSpread2({
+  autoStartLoad: true,
+  // used by stream-controller
+  startPosition: -1,
+  // used by stream-controller
+  defaultAudioCodec: undefined,
+  // used by stream-controller
+  debug: false,
+  // used by logger
+  capLevelOnFPSDrop: false,
+  // used by fps-controller
+  capLevelToPlayerSize: false,
+  // used by cap-level-controller
+  ignoreDevicePixelRatio: false,
+  // used by cap-level-controller
+  maxDevicePixelRatio: Number.POSITIVE_INFINITY,
+  // used by cap-level-controller
+  preferManagedMediaSource: true,
+  initialLiveManifestSize: 1,
+  // used by stream-controller
+  maxBufferLength: 30,
+  // used by stream-controller
+  backBufferLength: Infinity,
+  // used by buffer-controller
+  frontBufferFlushThreshold: Infinity,
+  startOnSegmentBoundary: false,
+  // used by stream-controller
+  maxBufferSize: 60 * 1000 * 1000,
+  // used by stream-controller
+  maxFragLookUpTolerance: 0.25,
+  // used by stream-controller
+  maxBufferHole: 0.1,
+  // used by stream-controller and gap-controller
+  detectStallWithCurrentTimeMs: 1250,
+  // used by gap-controller
+  highBufferWatchdogPeriod: 2,
+  // used by gap-controller
+  nudgeOffset: 0.1,
+  // used by gap-controller
+  nudgeMaxRetry: 3,
+  // used by gap-controller
+  nudgeOnVideoHole: true,
+  // used by gap-controller
+  liveSyncMode: 'edge',
+  // used by stream-controller
+  liveSyncDurationCount: 3,
+  // used by latency-controller
+  liveSyncOnStallIncrease: 1,
+  // used by latency-controller
+  liveMaxLatencyDurationCount: Infinity,
+  // used by latency-controller
+  liveSyncDuration: undefined,
+  // used by latency-controller
+  liveMaxLatencyDuration: undefined,
+  // used by latency-controller
+  maxLiveSyncPlaybackRate: 1,
+  // used by latency-controller
+  liveDurationInfinity: false,
+  // used by buffer-controller
+  /**
+   * @deprecated use backBufferLength
+   */
+  liveBackBufferLength: null,
+  // used by buffer-controller
+  maxMaxBufferLength: 600,
+  // used by stream-controller
+  enableWorker: true,
+  // used by transmuxer
+  workerPath: null,
+  // used by transmuxer
+  enableSoftwareAES: true,
+  // used by decrypter
+  startLevel: undefined,
+  // used by level-controller
+  startFragPrefetch: false,
+  // used by stream-controller
+  fpsDroppedMonitoringPeriod: 5000,
+  // used by fps-controller
+  fpsDroppedMonitoringThreshold: 0.2,
+  // used by fps-controller
+  appendErrorMaxRetry: 3,
+  // used by buffer-controller
+  ignorePlaylistParsingErrors: false,
+  loader: XhrLoader,
+  // loader: FetchLoader,
+  fLoader: undefined,
+  // used by fragment-loader
+  pLoader: undefined,
+  // used by playlist-loader
+  xhrSetup: undefined,
+  // used by xhr-loader
+  licenseXhrSetup: undefined,
+  // used by eme-controller
+  licenseResponseCallback: undefined,
+  // used by eme-controller
+  abrController: AbrController,
+  bufferController: BufferController,
+  capLevelController: CapLevelController,
+  errorController: ErrorController,
+  fpsController: FPSController,
+  stretchShortVideoTrack: false,
+  // used by mp4-remuxer
+  maxAudioFramesDrift: 1,
+  // used by mp4-remuxer
+  forceKeyFrameOnDiscontinuity: true,
+  // used by ts-demuxer
+  abrEwmaFastLive: 3,
+  // used by abr-controller
+  abrEwmaSlowLive: 9,
+  // used by abr-controller
+  abrEwmaFastVoD: 3,
+  // used by abr-controller
+  abrEwmaSlowVoD: 9,
+  // used by abr-controller
+  abrEwmaDefaultEstimate: 5e5,
+  // 500 kbps  // used by abr-controller
+  abrEwmaDefaultEstimateMax: 5e6,
+  // 5 mbps
+  abrBandWidthFactor: 0.95,
+  // used by abr-controller
+  abrBandWidthUpFactor: 0.7,
+  // used by abr-controller
+  abrMaxWithRealBitrate: false,
+  // used by abr-controller
+  maxStarvationDelay: 4,
+  // used by abr-controller
+  maxLoadingDelay: 4,
+  // used by abr-controller
+  minAutoBitrate: 0,
+  // used by hls
+  emeEnabled: false,
+  // used by eme-controller
+  widevineLicenseUrl: undefined,
+  // used by eme-controller
+  drmSystems: {},
+  // used by eme-controller
+  drmSystemOptions: {},
+  // used by eme-controller
+  requestMediaKeySystemAccessFunc: requestMediaKeySystemAccess ,
+  // used by eme-controller
+  requireKeySystemAccessOnStart: false,
+  // used by eme-controller
+  testBandwidth: true,
+  progressive: false,
+  lowLatencyMode: true,
+  cmcd: undefined,
+  enableDateRangeMetadataCues: true,
+  enableEmsgMetadataCues: true,
+  enableEmsgKLVMetadata: false,
+  enableID3MetadataCues: true,
+  enableInterstitialPlayback: true,
+  interstitialAppendInPlace: true,
+  interstitialLiveLookAhead: 10,
+  useMediaCapabilities: true,
+  preserveManualLevelOnError: false,
+  certLoadPolicy: {
+    default: defaultLoadPolicy
+  },
+  keyLoadPolicy: {
+    default: {
+      maxTimeToFirstByteMs: 8000,
+      maxLoadTimeMs: 20000,
+      timeoutRetry: {
+        maxNumRetry: 1,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 20000,
+        backoff: 'linear'
+      },
+      errorRetry: {
+        maxNumRetry: 8,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 20000,
+        backoff: 'linear'
+      }
+    }
+  },
+  manifestLoadPolicy: {
+    default: {
+      maxTimeToFirstByteMs: Infinity,
+      maxLoadTimeMs: 20000,
+      timeoutRetry: {
+        maxNumRetry: 2,
+        retryDelayMs: 0,
+        maxRetryDelayMs: 0
+      },
+      errorRetry: {
+        maxNumRetry: 1,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 8000
+      }
+    }
+  },
+  playlistLoadPolicy: {
+    default: {
+      maxTimeToFirstByteMs: 10000,
+      maxLoadTimeMs: 20000,
+      timeoutRetry: {
+        maxNumRetry: 2,
+        retryDelayMs: 0,
+        maxRetryDelayMs: 0
+      },
+      errorRetry: {
+        maxNumRetry: 2,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 8000
+      }
+    }
+  },
+  fragLoadPolicy: {
+    default: {
+      maxTimeToFirstByteMs: 10000,
+      maxLoadTimeMs: 120000,
+      timeoutRetry: {
+        maxNumRetry: 4,
+        retryDelayMs: 0,
+        maxRetryDelayMs: 0
+      },
+      errorRetry: {
+        maxNumRetry: 6,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 8000
+      }
+    }
+  },
+  steeringManifestLoadPolicy: {
+    default: {
+      maxTimeToFirstByteMs: 10000,
+      maxLoadTimeMs: 20000,
+      timeoutRetry: {
+        maxNumRetry: 2,
+        retryDelayMs: 0,
+        maxRetryDelayMs: 0
+      },
+      errorRetry: {
+        maxNumRetry: 1,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 8000
+      }
+    } 
+  },
+  interstitialAssetListLoadPolicy: {
+    default: {
+      maxTimeToFirstByteMs: 10000,
+      maxLoadTimeMs: 30000,
+      timeoutRetry: {
+        maxNumRetry: 0,
+        retryDelayMs: 0,
+        maxRetryDelayMs: 0
+      },
+      errorRetry: {
+        maxNumRetry: 0,
+        retryDelayMs: 1000,
+        maxRetryDelayMs: 8000
+      }
+    } 
+  },
+  // These default settings are deprecated in favor of the above policies
+  // and are maintained for backwards compatibility
+  manifestLoadingTimeOut: 10000,
+  manifestLoadingMaxRetry: 1,
+  manifestLoadingRetryDelay: 1000,
+  manifestLoadingMaxRetryTimeout: 64000,
+  levelLoadingTimeOut: 10000,
+  levelLoadingMaxRetry: 4,
+  levelLoadingRetryDelay: 1000,
+  levelLoadingMaxRetryTimeout: 64000,
+  fragLoadingTimeOut: 20000,
+  fragLoadingMaxRetry: 6,
+  fragLoadingRetryDelay: 1000,
+  fragLoadingMaxRetryTimeout: 64000
+}, timelineConfig()), {}, {
+  subtitleStreamController: SubtitleStreamController ,
+  subtitleTrackController: SubtitleTrackController ,
+  timelineController: TimelineController ,
+  audioStreamController: AudioStreamController ,
+  audioTrackController: AudioTrackController ,
+  emeController: EMEController ,
+  cmcdController: CMCDController ,
+  contentSteeringController: ContentSteeringController ,
+  interstitialsController: InterstitialsController 
+});
+function timelineConfig() {
+  return {
+    cueHandler: Cues,
+    // used by timeline-controller
+    enableWebVTT: true,
+    // used by timeline-controller
+    enableIMSC1: true,
+    // used by timeline-controller
+    enableCEA708Captions: true,
+    // used by timeline-controller
+    captionsTextTrack1Label: 'English',
+    // used by timeline-controller
+    captionsTextTrack1LanguageCode: 'en',
+    // used by timeline-controller
+    captionsTextTrack2Label: 'Spanish',
+    // used by timeline-controller
+    captionsTextTrack2LanguageCode: 'es',
+    // used by timeline-controller
+    captionsTextTrack3Label: 'Unknown CC',
+    // used by timeline-controller
+    captionsTextTrack3LanguageCode: '',
+    // used by timeline-controller
+    captionsTextTrack4Label: 'Unknown CC',
+    // used by timeline-controller
+    captionsTextTrack4LanguageCode: '',
+    // used by timeline-controller
+    renderTextTracksNatively: true
+  };
+}
+
+/**
+ * @ignore
+ */
+function mergeConfig(defaultConfig, userConfig, logger) {
+  if ((userConfig.liveSyncDurationCount || userConfig.liveMaxLatencyDurationCount) && (userConfig.liveSyncDuration || userConfig.liveMaxLatencyDuration)) {
+    throw new Error("Illegal hls.js config: don't mix up liveSyncDurationCount/liveMaxLatencyDurationCount and liveSyncDuration/liveMaxLatencyDuration");
+  }
+  if (userConfig.liveMaxLatencyDurationCount !== undefined && (userConfig.liveSyncDurationCount === undefined || userConfig.liveMaxLatencyDurationCount <= userConfig.liveSyncDurationCount)) {
+    throw new Error('Illegal hls.js config: "liveMaxLatencyDurationCount" must be greater than "liveSyncDurationCount"');
+  }
+  if (userConfig.liveMaxLatencyDuration !== undefined && (userConfig.liveSyncDuration === undefined || userConfig.liveMaxLatencyDuration <= userConfig.liveSyncDuration)) {
+    throw new Error('Illegal hls.js config: "liveMaxLatencyDuration" must be greater than "liveSyncDuration"');
+  }
+  const defaultsCopy = deepCpy(defaultConfig);
+
+  // Backwards compatibility with deprecated config values
+  const deprecatedSettingTypes = ['manifest', 'level', 'frag'];
+  const deprecatedSettings = ['TimeOut', 'MaxRetry', 'RetryDelay', 'MaxRetryTimeout'];
+  deprecatedSettingTypes.forEach(type => {
+    const policyName = `${type === 'level' ? 'playlist' : type}LoadPolicy`;
+    const policyNotSet = userConfig[policyName] === undefined;
+    const report = [];
+    deprecatedSettings.forEach(setting => {
+      const deprecatedSetting = `${type}Loading${setting}`;
+      const value = userConfig[deprecatedSetting];
+      if (value !== undefined && policyNotSet) {
+        report.push(deprecatedSetting);
+        const settings = defaultsCopy[policyName].default;
+        userConfig[policyName] = {
+          default: settings
+        };
+        switch (setting) {
+          case 'TimeOut':
+            settings.maxLoadTimeMs = value;
+            settings.maxTimeToFirstByteMs = value;
+            break;
+          case 'MaxRetry':
+            settings.errorRetry.maxNumRetry = value;
+            settings.timeoutRetry.maxNumRetry = value;
+            break;
+          case 'RetryDelay':
+            settings.errorRetry.retryDelayMs = value;
+            settings.timeoutRetry.retryDelayMs = value;
+            break;
+          case 'MaxRetryTimeout':
+            settings.errorRetry.maxRetryDelayMs = value;
+            settings.timeoutRetry.maxRetryDelayMs = value;
+            break;
+        }
+      }
+    });
+    if (report.length) {
+      logger.warn(`hls.js config: "${report.join('", "')}" setting(s) are deprecated, use "${policyName}": ${stringify(userConfig[policyName])}`);
+    }
+  });
+  return _objectSpread2(_objectSpread2({}, defaultsCopy), userConfig);
+}
+function deepCpy(obj) {
+  if (obj && typeof obj === 'object') {
+    if (Array.isArray(obj)) {
+      return obj.map(deepCpy);
+    }
+    return Object.keys(obj).reduce((result, key) => {
+      result[key] = deepCpy(obj[key]);
+      return result;
+    }, {});
+  }
+  return obj;
+}
+
+/**
+ * @ignore
+ */
+function enableStreamingMode(config, logger) {
+  const currentLoader = config.loader;
+  if (currentLoader !== FetchLoader && currentLoader !== XhrLoader) {
+    // If a developer has configured their own loader, respect that choice
+    logger.log('[config]: Custom loader detected, cannot enable progressive streaming');
+    config.progressive = false;
+  } else {
+    const canStreamProgressively = fetchSupported();
+    if (canStreamProgressively) {
+      config.loader = FetchLoader;
+      config.progressive = true;
+      config.enableSoftwareAES = true;
+      logger.log('[config]: Progressive streaming enabled, using FetchLoader');
+    }
+  }
+}
+
+const MAX_START_GAP_JUMP = 2.0;
+const SKIP_BUFFER_HOLE_STEP_SECONDS = 0.1;
+const SKIP_BUFFER_RANGE_START = 0.05;
+const TICK_INTERVAL$1 = 100;
+class GapController extends TaskLoop {
+  constructor(hls, fragmentTracker) {
+    super('gap-controller', hls.logger);
+    this.hls = void 0;
+    this.fragmentTracker = void 0;
+    this.media = null;
+    this.mediaSource = void 0;
+    this.nudgeRetry = 0;
+    this.stallReported = false;
+    this.stalled = null;
+    this.moved = false;
+    this.seeking = false;
+    this.buffered = {};
+    this.lastCurrentTime = 0;
+    this.ended = 0;
+    this.waiting = 0;
+    this.onMediaPlaying = () => {
+      this.ended = 0;
+      this.waiting = 0;
+    };
+    this.onMediaWaiting = () => {
+      var _this$media;
+      if ((_this$media = this.media) != null && _this$media.seeking) {
+        return;
+      }
+      this.waiting = self.performance.now();
+      this.tick();
+    };
+    this.onMediaEnded = () => {
+      if (this.hls) {
+        var _this$media2;
+        // ended is set when triggering MEDIA_ENDED so that we do not trigger it again on stall or on tick with media.ended
+        this.ended = ((_this$media2 = this.media) == null ? void 0 : _this$media2.currentTime) || 1;
+        this.hls.trigger(Events.MEDIA_ENDED, {
+          stalled: false
+        });
+      }
+    };
+    this.hls = hls;
+    this.fragmentTracker = fragmentTracker;
+    this.registerListeners();
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    if (hls) {
+      hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+      hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+      hls.on(Events.BUFFER_APPENDED, this.onBufferAppended, this);
+    }
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    if (hls) {
+      hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+      hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+      hls.off(Events.BUFFER_APPENDED, this.onBufferAppended, this);
+    }
+  }
+  destroy() {
+    super.destroy();
+    this.unregisterListeners();
+    this.media = this.hls = this.fragmentTracker = null;
+    this.mediaSource = undefined;
+  }
+  onMediaAttached(event, data) {
+    this.setInterval(TICK_INTERVAL$1);
+    this.mediaSource = data.mediaSource;
+    const media = this.media = data.media;
+    addEventListener(media, 'playing', this.onMediaPlaying);
+    addEventListener(media, 'waiting', this.onMediaWaiting);
+    addEventListener(media, 'ended', this.onMediaEnded);
+  }
+  onMediaDetaching(event, data) {
+    this.clearInterval();
+    const {
+      media
+    } = this;
+    if (media) {
+      removeEventListener(media, 'playing', this.onMediaPlaying);
+      removeEventListener(media, 'waiting', this.onMediaWaiting);
+      removeEventListener(media, 'ended', this.onMediaEnded);
+      this.media = null;
+    }
+    this.mediaSource = undefined;
+  }
+  onBufferAppended(event, data) {
+    this.buffered = data.timeRanges;
+  }
+  get hasBuffered() {
+    return Object.keys(this.buffered).length > 0;
+  }
+  tick() {
+    var _this$media3;
+    if (!((_this$media3 = this.media) != null && _this$media3.readyState) || !this.hasBuffered) {
+      return;
+    }
+    const currentTime = this.media.currentTime;
+    this.poll(currentTime, this.lastCurrentTime);
+    this.lastCurrentTime = currentTime;
+  }
+
+  /**
+   * Checks if the playhead is stuck within a gap, and if so, attempts to free it.
+   * A gap is an unbuffered range between two buffered ranges (or the start and the first buffered range).
+   *
+   * @param lastCurrentTime - Previously read playhead position
+   */
+  poll(currentTime, lastCurrentTime) {
+    var _this$hls, _this$hls2;
+    const config = (_this$hls = this.hls) == null ? void 0 : _this$hls.config;
+    if (!config) {
+      return;
+    }
+    const media = this.media;
+    if (!media) {
+      return;
+    }
+    const {
+      seeking
+    } = media;
+    const seeked = this.seeking && !seeking;
+    const beginSeek = !this.seeking && seeking;
+    const pausedEndedOrHalted = media.paused && !seeking || media.ended || media.playbackRate === 0;
+    this.seeking = seeking;
+
+    // The playhead is moving, no-op
+    if (currentTime !== lastCurrentTime) {
+      if (lastCurrentTime) {
+        this.ended = 0;
+      }
+      this.moved = true;
+      if (!seeking) {
+        this.nudgeRetry = 0;
+        // When crossing between buffered video time ranges, but not audio, flush pipeline with seek (Chrome)
+        if (config.nudgeOnVideoHole && !pausedEndedOrHalted && currentTime > lastCurrentTime) {
+          this.nudgeOnVideoHole(currentTime, lastCurrentTime);
+        }
+      }
+      if (this.waiting === 0) {
+        this.stallResolved(currentTime);
+      }
+      return;
+    }
+
+    // Clear stalled state when beginning or finishing seeking so that we don't report stalls coming out of a seek
+    if (beginSeek || seeked) {
+      if (seeked) {
+        this.stallResolved(currentTime);
+      }
+      return;
+    }
+
+    // The playhead should not be moving
+    if (pausedEndedOrHalted) {
+      this.nudgeRetry = 0;
+      this.stallResolved(currentTime);
+      // Fire MEDIA_ENDED to workaround event not being dispatched by browser
+      if (!this.ended && media.ended && this.hls) {
+        this.ended = currentTime || 1;
+        this.hls.trigger(Events.MEDIA_ENDED, {
+          stalled: false
+        });
+      }
+      return;
+    }
+    if (!BufferHelper.getBuffered(media).length) {
+      this.nudgeRetry = 0;
+      return;
+    }
+
+    // Resolve stalls at buffer holes using the main buffer, whose ranges are the intersections of the A/V sourcebuffers
+    const bufferInfo = BufferHelper.bufferInfo(media, currentTime, 0);
+    const nextStart = bufferInfo.nextStart || 0;
+    const fragmentTracker = this.fragmentTracker;
+    if (seeking && fragmentTracker && this.hls) {
+      // Is there a fragment loading/parsing/appending before currentTime?
+      const inFlightDependency = getInFlightDependency(this.hls.inFlightFragments, currentTime);
+
+      // Waiting for seeking in a buffered range to complete
+      const hasEnoughBuffer = bufferInfo.len > MAX_START_GAP_JUMP;
+      // Next buffered range is too far ahead to jump to while still seeking
+      const noBufferHole = !nextStart || inFlightDependency || nextStart - currentTime > MAX_START_GAP_JUMP && !fragmentTracker.getPartialFragment(currentTime);
+      if (hasEnoughBuffer || noBufferHole) {
+        return;
+      }
+      // Reset moved state when seeking to a point in or before a gap/hole
+      this.moved = false;
+    }
+
+    // Skip start gaps if we haven't played, but the last poll detected the start of a stall
+    // The addition poll gives the browser a chance to jump the gap for us
+    const levelDetails = (_this$hls2 = this.hls) == null ? void 0 : _this$hls2.latestLevelDetails;
+    if (!this.moved && this.stalled !== null && fragmentTracker) {
+      // There is no playable buffer (seeked, waiting for buffer)
+      const isBuffered = bufferInfo.len > 0;
+      if (!isBuffered && !nextStart) {
+        return;
+      }
+      // Jump start gaps within jump threshold
+      const startJump = Math.max(nextStart, bufferInfo.start || 0) - currentTime;
+
+      // When joining a live stream with audio tracks, account for live playlist window sliding by allowing
+      // a larger jump over start gaps caused by the audio-stream-controller buffering a start fragment
+      // that begins over 1 target duration after the video start position.
+      const isLive = !!(levelDetails != null && levelDetails.live);
+      const maxStartGapJump = isLive ? levelDetails.targetduration * 2 : MAX_START_GAP_JUMP;
+      const appended = appendedFragAtPosition(currentTime, fragmentTracker);
+      if (startJump > 0 && (startJump <= maxStartGapJump || appended)) {
+        if (!media.paused) {
+          this._trySkipBufferHole(appended);
+        }
+        return;
+      }
+    }
+
+    // Start tracking stall time
+    const detectStallWithCurrentTimeMs = config.detectStallWithCurrentTimeMs;
+    const tnow = self.performance.now();
+    const tWaiting = this.waiting;
+    let stalled = this.stalled;
+    if (stalled === null) {
+      // Use time of recent "waiting" event
+      if (tWaiting > 0 && tnow - tWaiting < detectStallWithCurrentTimeMs) {
+        stalled = this.stalled = tWaiting;
+      } else {
+        this.stalled = tnow;
+        return;
+      }
+    }
+    const stalledDuration = tnow - stalled;
+    if (!seeking && (stalledDuration >= detectStallWithCurrentTimeMs || tWaiting) && this.hls) {
+      var _this$mediaSource;
+      // Dispatch MEDIA_ENDED when media.ended/ended event is not signalled at end of stream
+      if (((_this$mediaSource = this.mediaSource) == null ? void 0 : _this$mediaSource.readyState) === 'ended' && !(levelDetails != null && levelDetails.live) && Math.abs(currentTime - ((levelDetails == null ? void 0 : levelDetails.edge) || 0)) < 1) {
+        if (this.ended) {
+          return;
+        }
+        this.ended = currentTime || 1;
+        this.hls.trigger(Events.MEDIA_ENDED, {
+          stalled: true
+        });
+        return;
+      }
+      // Report stalling after trying to fix
+      this._reportStall(bufferInfo);
+      if (!this.media || !this.hls) {
+        return;
+      }
+    }
+    const bufferedWithHoles = BufferHelper.bufferInfo(media, currentTime, config.maxBufferHole);
+    this._tryFixBufferStall(bufferedWithHoles, stalledDuration, currentTime);
+  }
+  stallResolved(currentTime) {
+    const stalled = this.stalled;
+    if (stalled && this.hls) {
+      this.stalled = null;
+      // The playhead is now moving, but was previously stalled
+      if (this.stallReported) {
+        const stalledDuration = self.performance.now() - stalled;
+        this.log(`playback not stuck anymore @${currentTime}, after ${Math.round(stalledDuration)}ms`);
+        this.stallReported = false;
+        this.waiting = 0;
+        this.hls.trigger(Events.STALL_RESOLVED, {});
+      }
+    }
+  }
+  nudgeOnVideoHole(currentTime, lastCurrentTime) {
+    var _this$buffered$audio;
+    // Chrome will play one second past a hole in video buffered time ranges without rendering any video from the subsequent range and then stall as long as audio is buffered:
+    // https://github.com/video-dev/hls.js/issues/5631
+    // https://issues.chromium.org/issues/40280613#comment10
+    // Detect the potential for this situation and proactively seek to flush the video pipeline once the playhead passes the start of the video hole.
+    // When there are audio and video buffers and currentTime is past the end of the first video buffered range...
+    const videoSourceBuffered = this.buffered.video;
+    if (this.hls && this.media && this.fragmentTracker && (_this$buffered$audio = this.buffered.audio) != null && _this$buffered$audio.length && videoSourceBuffered && videoSourceBuffered.length > 1 && currentTime > videoSourceBuffered.end(0)) {
+      // and audio is buffered at the playhead
+      const audioBufferInfo = BufferHelper.bufferedInfo(BufferHelper.timeRangesToArray(this.buffered.audio), currentTime, 0);
+      if (audioBufferInfo.len > 1 && lastCurrentTime >= audioBufferInfo.start) {
+        const videoTimes = BufferHelper.timeRangesToArray(videoSourceBuffered);
+        const lastBufferedIndex = BufferHelper.bufferedInfo(videoTimes, lastCurrentTime, 0).bufferedIndex;
+        // nudge when crossing into another video buffered range (hole).
+        if (lastBufferedIndex > -1 && lastBufferedIndex < videoTimes.length - 1) {
+          const bufferedIndex = BufferHelper.bufferedInfo(videoTimes, currentTime, 0).bufferedIndex;
+          const holeStart = videoTimes[lastBufferedIndex].end;
+          const holeEnd = videoTimes[lastBufferedIndex + 1].start;
+          if ((bufferedIndex === -1 || bufferedIndex > lastBufferedIndex) && holeEnd - holeStart < 1 &&
+          // `maxBufferHole` may be too small and setting it to 0 should not disable this feature
+          currentTime - holeStart < 2) {
+            const error = new Error(`nudging playhead to flush pipeline after video hole. currentTime: ${currentTime} hole: ${holeStart} -> ${holeEnd} buffered index: ${bufferedIndex}`);
+            this.warn(error.message);
+            // Magic number to flush the pipeline without interuption to audio playback:
+            this.media.currentTime += 0.000001;
+            let frag = appendedFragAtPosition(currentTime, this.fragmentTracker);
+            if (frag && 'fragment' in frag) {
+              frag = frag.fragment;
+            } else if (!frag) {
+              frag = undefined;
+            }
+            const bufferInfo = BufferHelper.bufferInfo(this.media, currentTime, 0);
+            this.hls.trigger(Events.ERROR, {
+              type: ErrorTypes.MEDIA_ERROR,
+              details: ErrorDetails.BUFFER_SEEK_OVER_HOLE,
+              fatal: false,
+              error,
+              reason: error.message,
+              frag,
+              buffer: bufferInfo.len,
+              bufferInfo
+            });
+          }
+        }
+      }
+    }
+  }
+
+  /**
+   * Detects and attempts to fix known buffer stalling issues.
+   * @param bufferInfo - The properties of the current buffer.
+   * @param stalledDurationMs - The amount of time Hls.js has been stalling for.
+   * @private
+   */
+  _tryFixBufferStall(bufferInfo, stalledDurationMs, currentTime) {
+    var _this$hls3, _this$hls4;
+    const {
+      fragmentTracker,
+      media
+    } = this;
+    const config = (_this$hls3 = this.hls) == null ? void 0 : _this$hls3.config;
+    if (!media || !fragmentTracker || !config) {
+      return;
+    }
+    const levelDetails = (_this$hls4 = this.hls) == null ? void 0 : _this$hls4.latestLevelDetails;
+    const appended = appendedFragAtPosition(currentTime, fragmentTracker);
+    if (appended || levelDetails != null && levelDetails.live && currentTime < levelDetails.fragmentStart) {
+      // Try to skip over the buffer hole caused by a partial fragment
+      // This method isn't limited by the size of the gap between buffered ranges
+      const targetTime = this._trySkipBufferHole(appended);
+      // we return here in this case, meaning
+      // the branch below only executes when we haven't seeked to a new position
+      if (targetTime || !this.media) {
+        return;
+      }
+    }
+
+    // if we haven't had to skip over a buffer hole of a partial fragment
+    // we may just have to "nudge" the playlist as the browser decoding/rendering engine
+    // needs to cross some sort of threshold covering all source-buffers content
+    // to start playing properly.
+    const bufferedRanges = bufferInfo.buffered;
+    const adjacentTraversal = this.adjacentTraversal(bufferInfo, currentTime);
+    if ((bufferedRanges && bufferedRanges.length > 1 && bufferInfo.len > config.maxBufferHole || bufferInfo.nextStart && (bufferInfo.nextStart - currentTime < config.maxBufferHole || adjacentTraversal)) && (stalledDurationMs > config.highBufferWatchdogPeriod * 1000 || this.waiting)) {
+      this.warn('Trying to nudge playhead over buffer-hole');
+      // Try to nudge currentTime over a buffer hole if we've been stalling for the configured amount of seconds
+      // We only try to jump the hole if it's under the configured size
+      this._tryNudgeBuffer(bufferInfo);
+    }
+  }
+  adjacentTraversal(bufferInfo, currentTime) {
+    const fragmentTracker = this.fragmentTracker;
+    const nextStart = bufferInfo.nextStart;
+    if (fragmentTracker && nextStart) {
+      const current = fragmentTracker.getFragAtPos(currentTime, PlaylistLevelType.MAIN);
+      const next = fragmentTracker.getFragAtPos(nextStart, PlaylistLevelType.MAIN);
+      if (current && next) {
+        return next.sn - current.sn < 2;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Triggers a BUFFER_STALLED_ERROR event, but only once per stall period.
+   * @param bufferLen - The playhead distance from the end of the current buffer segment.
+   * @private
+   */
+  _reportStall(bufferInfo) {
+    const {
+      hls,
+      media,
+      stallReported,
+      stalled
+    } = this;
+    if (!stallReported && stalled !== null && media && hls) {
+      // Report stalled error once
+      this.stallReported = true;
+      const error = new Error(`Playback stalling at @${media.currentTime} due to low buffer (${stringify(bufferInfo)})`);
+      this.warn(error.message);
+      hls.trigger(Events.ERROR, {
+        type: ErrorTypes.MEDIA_ERROR,
+        details: ErrorDetails.BUFFER_STALLED_ERROR,
+        fatal: false,
+        error,
+        buffer: bufferInfo.len,
+        bufferInfo,
+        stalled: {
+          start: stalled
+        }
+      });
+    }
+  }
+
+  /**
+   * Attempts to fix buffer stalls by jumping over known gaps caused by partial fragments
+   * @param appended - The fragment or part found at the current time (where playback is stalling).
+   * @private
+   */
+  _trySkipBufferHole(appended) {
+    var _this$hls5;
+    const {
+      fragmentTracker,
+      media
+    } = this;
+    const config = (_this$hls5 = this.hls) == null ? void 0 : _this$hls5.config;
+    if (!media || !fragmentTracker || !config) {
+      return 0;
+    }
+
+    // Check if currentTime is between unbuffered regions of partial fragments
+    const currentTime = media.currentTime;
+    const bufferInfo = BufferHelper.bufferInfo(media, currentTime, 0);
+    const startTime = currentTime < bufferInfo.start ? bufferInfo.start : bufferInfo.nextStart;
+    if (startTime && this.hls) {
+      const bufferStarved = bufferInfo.len <= config.maxBufferHole;
+      const waiting = bufferInfo.len > 0 && bufferInfo.len < 1 && media.readyState < 3;
+      const gapLength = startTime - currentTime;
+      if (gapLength > 0 && (bufferStarved || waiting)) {
+        // Only allow large gaps to be skipped if it is a start gap, or all fragments in skip range are partial
+        if (gapLength > config.maxBufferHole) {
+          let startGap = false;
+          if (currentTime === 0) {
+            const startFrag = fragmentTracker.getAppendedFrag(0, PlaylistLevelType.MAIN);
+            if (startFrag && startTime < startFrag.end) {
+              startGap = true;
+            }
+          }
+          if (!startGap && appended) {
+            var _this$hls$loadLevelOb;
+            // Do not seek when selected variant playlist is unloaded
+            if (!((_this$hls$loadLevelOb = this.hls.loadLevelObj) != null && _this$hls$loadLevelOb.details)) {
+              return 0;
+            }
+            // Do not seek when required fragments are inflight or appending
+            const inFlightDependency = getInFlightDependency(this.hls.inFlightFragments, startTime);
+            if (inFlightDependency) {
+              return 0;
+            }
+            // Do not seek if we can't walk tracked fragments to end of gap
+            let moreToLoad = false;
+            let pos = appended.end;
+            while (pos < startTime) {
+              const provisioned = appendedFragAtPosition(pos, fragmentTracker);
+              if (provisioned) {
+                pos += provisioned.duration;
+              } else {
+                moreToLoad = true;
+                break;
+              }
+            }
+            if (moreToLoad) {
+              return 0;
+            }
+          }
+        }
+        const targetTime = Math.max(startTime + SKIP_BUFFER_RANGE_START, currentTime + SKIP_BUFFER_HOLE_STEP_SECONDS);
+        this.warn(`skipping hole, adjusting currentTime from ${currentTime} to ${targetTime}`);
+        this.moved = true;
+        media.currentTime = targetTime;
+        if (!(appended != null && appended.gap)) {
+          const error = new Error(`fragment loaded with buffer holes, seeking from ${currentTime} to ${targetTime}`);
+          const errorData = {
+            type: ErrorTypes.MEDIA_ERROR,
+            details: ErrorDetails.BUFFER_SEEK_OVER_HOLE,
+            fatal: false,
+            error,
+            reason: error.message,
+            buffer: bufferInfo.len,
+            bufferInfo
+          };
+          if (appended) {
+            if ('fragment' in appended) {
+              errorData.part = appended;
+            } else {
+              errorData.frag = appended;
+            }
+          }
+          this.hls.trigger(Events.ERROR, errorData);
+        }
+        return targetTime;
+      }
+    }
+    return 0;
+  }
+
+  /**
+   * Attempts to fix buffer stalls by advancing the mediaElement's current time by a small amount.
+   * @private
+   */
+  _tryNudgeBuffer(bufferInfo) {
+    const {
+      hls,
+      media,
+      nudgeRetry
+    } = this;
+    const config = hls == null ? void 0 : hls.config;
+    if (!media || !config) {
+      return 0;
+    }
+    const currentTime = media.currentTime;
+    this.nudgeRetry++;
+    if (nudgeRetry < config.nudgeMaxRetry) {
+      const targetTime = currentTime + (nudgeRetry + 1) * config.nudgeOffset;
+      // playback stalled in buffered area ... let's nudge currentTime to try to overcome this
+      const error = new Error(`Nudging 'currentTime' from ${currentTime} to ${targetTime}`);
+      this.warn(error.message);
+      media.currentTime = targetTime;
+      hls.trigger(Events.ERROR, {
+        type: ErrorTypes.MEDIA_ERROR,
+        details: ErrorDetails.BUFFER_NUDGE_ON_STALL,
+        error,
+        fatal: false,
+        buffer: bufferInfo.len,
+        bufferInfo
+      });
+    } else {
+      const error = new Error(`Playhead still not moving while enough data buffered @${currentTime} after ${config.nudgeMaxRetry} nudges`);
+      this.error(error.message);
+      hls.trigger(Events.ERROR, {
+        type: ErrorTypes.MEDIA_ERROR,
+        details: ErrorDetails.BUFFER_STALLED_ERROR,
+        error,
+        fatal: true,
+        buffer: bufferInfo.len,
+        bufferInfo
+      });
+    }
+  }
+}
+function getInFlightDependency(inFlightFragments, currentTime) {
+  const main = inFlight(inFlightFragments.main);
+  if (main && main.start <= currentTime) {
+    return main;
+  }
+  const audio = inFlight(inFlightFragments.audio);
+  if (audio && audio.start <= currentTime) {
+    return audio;
+  }
+  return null;
+}
+function inFlight(inFlightData) {
+  if (!inFlightData) {
+    return null;
+  }
+  switch (inFlightData.state) {
+    case State.IDLE:
+    case State.STOPPED:
+    case State.ENDED:
+    case State.ERROR:
+      return null;
+  }
+  return inFlightData.frag;
+}
+function appendedFragAtPosition(pos, fragmentTracker) {
+  return fragmentTracker.getAppendedFrag(pos, PlaylistLevelType.MAIN) || fragmentTracker.getPartialFragment(pos);
+}
+
+const MIN_CUE_DURATION = 0.25;
+function getCueClass() {
+  if (typeof self === 'undefined') return undefined;
+  return self.VTTCue || self.TextTrackCue;
+}
+function createCueWithDataFields(Cue, startTime, endTime, data, type) {
+  let cue = new Cue(startTime, endTime, '');
+  try {
+    cue.value = data;
+    if (type) {
+      cue.type = type;
+    }
+  } catch (e) {
+    cue = new Cue(startTime, endTime, stringify(type ? _objectSpread2({
+      type
+    }, data) : data));
+  }
+  return cue;
+}
+
+// VTTCue latest draft allows an infinite duration, fallback
+// to MAX_VALUE if necessary
+const MAX_CUE_ENDTIME = (() => {
+  const Cue = getCueClass();
+  try {
+    Cue && new Cue(0, Number.POSITIVE_INFINITY, '');
+  } catch (e) {
+    return Number.MAX_VALUE;
+  }
+  return Number.POSITIVE_INFINITY;
+})();
+class ID3TrackController {
+  constructor(hls) {
+    this.hls = void 0;
+    this.id3Track = null;
+    this.media = null;
+    this.dateRangeCuesAppended = {};
+    this.removeCues = true;
+    this.assetCue = void 0;
+    this.onEventCueEnter = () => {
+      if (!this.hls) {
+        return;
+      }
+      this.hls.trigger(Events.EVENT_CUE_ENTER, {});
+    };
+    this.hls = hls;
+    this._registerListeners();
+  }
+  destroy() {
+    this._unregisterListeners();
+    this.id3Track = null;
+    this.media = null;
+    this.dateRangeCuesAppended = {};
+    // @ts-ignore
+    this.hls = this.onEventCueEnter = null;
+  }
+  _registerListeners() {
+    const {
+      hls
+    } = this;
+    if (hls) {
+      hls.on(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+      hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+      hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+      hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+      hls.on(Events.FRAG_PARSING_METADATA, this.onFragParsingMetadata, this);
+      hls.on(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+      hls.on(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+      hls.on(Events.LEVEL_PTS_UPDATED, this.onLevelPtsUpdated, this);
+    }
+  }
+  _unregisterListeners() {
+    const {
+      hls
+    } = this;
+    if (hls) {
+      hls.off(Events.MEDIA_ATTACHING, this.onMediaAttaching, this);
+      hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+      hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+      hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+      hls.off(Events.FRAG_PARSING_METADATA, this.onFragParsingMetadata, this);
+      hls.off(Events.BUFFER_FLUSHING, this.onBufferFlushing, this);
+      hls.off(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+      hls.off(Events.LEVEL_PTS_UPDATED, this.onLevelPtsUpdated, this);
+    }
+  }
+  // Add ID3 metatadata text track.
+  onMediaAttaching(event, data) {
+    var _data$overrides;
+    this.media = data.media;
+    if (((_data$overrides = data.overrides) == null ? void 0 : _data$overrides.cueRemoval) === false) {
+      this.removeCues = false;
+    }
+  }
+  onMediaAttached() {
+    var _this$hls;
+    const details = (_this$hls = this.hls) == null ? void 0 : _this$hls.latestLevelDetails;
+    if (details) {
+      this.updateDateRangeCues(details);
+    }
+  }
+  onMediaDetaching(event, data) {
+    this.media = null;
+    const transferringMedia = !!data.transferMedia;
+    if (transferringMedia) {
+      return;
+    }
+    if (this.id3Track) {
+      if (this.removeCues) {
+        clearCurrentCues(this.id3Track, this.onEventCueEnter);
+      }
+      this.id3Track = null;
+    }
+    this.dateRangeCuesAppended = {};
+  }
+  onManifestLoading() {
+    this.dateRangeCuesAppended = {};
+  }
+  createTrack(media) {
+    const track = this.getID3Track(media.textTracks);
+    track.mode = 'hidden';
+    return track;
+  }
+  getID3Track(textTracks) {
+    if (!this.media) {
+      return;
+    }
+    for (let i = 0; i < textTracks.length; i++) {
+      const textTrack = textTracks[i];
+      if (textTrack.kind === 'metadata' && textTrack.label === 'id3') {
+        // send 'addtrack' when reusing the textTrack for metadata,
+        // same as what we do for captions
+        sendAddTrackEvent(textTrack, this.media);
+        return textTrack;
+      }
+    }
+    return this.media.addTextTrack('metadata', 'id3');
+  }
+  onFragParsingMetadata(event, data) {
+    if (!this.media || !this.hls) {
+      return;
+    }
+    const {
+      enableEmsgMetadataCues,
+      enableID3MetadataCues
+    } = this.hls.config;
+    if (!enableEmsgMetadataCues && !enableID3MetadataCues) {
+      return;
+    }
+    const {
+      samples
+    } = data;
+
+    // create track dynamically
+    if (!this.id3Track) {
+      this.id3Track = this.createTrack(this.media);
+    }
+    const Cue = getCueClass();
+    if (!Cue) {
+      return;
+    }
+    for (let i = 0; i < samples.length; i++) {
+      const type = samples[i].type;
+      if (type === MetadataSchema.emsg && !enableEmsgMetadataCues || !enableID3MetadataCues) {
+        continue;
+      }
+      const frames = getId3Frames(samples[i].data);
+      const startTime = samples[i].pts;
+      let endTime = startTime + samples[i].duration;
+      if (endTime > MAX_CUE_ENDTIME) {
+        endTime = MAX_CUE_ENDTIME;
+      }
+      const timeDiff = endTime - startTime;
+      if (timeDiff <= 0) {
+        endTime = startTime + MIN_CUE_DURATION;
+      }
+      for (let j = 0; j < frames.length; j++) {
+        const frame = frames[j];
+        // Safari doesn't put the timestamp frame in the TextTrack
+        if (!isId3TimestampFrame(frame)) {
+          // add a bounds to any unbounded cues
+          this.updateId3CueEnds(startTime, type);
+          const cue = createCueWithDataFields(Cue, startTime, endTime, frame, type);
+          if (cue) {
+            this.id3Track.addCue(cue);
+          }
+        }
+      }
+    }
+  }
+  updateId3CueEnds(startTime, type) {
+    var _this$id3Track;
+    const cues = (_this$id3Track = this.id3Track) == null ? void 0 : _this$id3Track.cues;
+    if (cues) {
+      for (let i = cues.length; i--;) {
+        const cue = cues[i];
+        if (cue.type === type && cue.startTime < startTime && cue.endTime === MAX_CUE_ENDTIME) {
+          cue.endTime = startTime;
+        }
+      }
+    }
+  }
+  onBufferFlushing(event, {
+    startOffset,
+    endOffset,
+    type
+  }) {
+    const {
+      id3Track,
+      hls
+    } = this;
+    if (!hls) {
+      return;
+    }
+    const {
+      config: {
+        enableEmsgMetadataCues,
+        enableID3MetadataCues
+      }
+    } = hls;
+    if (id3Track && (enableEmsgMetadataCues || enableID3MetadataCues)) {
+      let predicate;
+      if (type === 'audio') {
+        predicate = cue => cue.type === MetadataSchema.audioId3 && enableID3MetadataCues;
+      } else if (type === 'video') {
+        predicate = cue => cue.type === MetadataSchema.emsg && enableEmsgMetadataCues;
+      } else {
+        predicate = cue => cue.type === MetadataSchema.audioId3 && enableID3MetadataCues || cue.type === MetadataSchema.emsg && enableEmsgMetadataCues;
+      }
+      removeCuesInRange(id3Track, startOffset, endOffset, predicate);
+    }
+  }
+  onLevelUpdated(event, {
+    details
+  }) {
+    this.updateDateRangeCues(details, true);
+  }
+  onLevelPtsUpdated(event, data) {
+    if (Math.abs(data.drift) > 0.01) {
+      this.updateDateRangeCues(data.details);
+    }
+  }
+  updateDateRangeCues(details, removeOldCues) {
+    if (!this.hls || !this.media) {
+      return;
+    }
+    const {
+      assetPlayerId,
+      timelineOffset,
+      enableDateRangeMetadataCues,
+      interstitialsController
+    } = this.hls.config;
+    if (!enableDateRangeMetadataCues) {
+      return;
+    }
+    const Cue = getCueClass();
+    if (assetPlayerId && timelineOffset && !interstitialsController) {
+      const {
+        fragmentStart,
+        fragmentEnd
+      } = details;
+      let cue = this.assetCue;
+      if (cue) {
+        cue.startTime = fragmentStart;
+        cue.endTime = fragmentEnd;
+      } else if (Cue) {
+        cue = this.assetCue = createCueWithDataFields(Cue, fragmentStart, fragmentEnd, {
+          assetPlayerId: this.hls.config.assetPlayerId
+        }, 'hlsjs.interstitial.asset');
+        if (cue) {
+          cue.id = assetPlayerId;
+          this.id3Track || (this.id3Track = this.createTrack(this.media));
+          this.id3Track.addCue(cue);
+          cue.addEventListener('enter', this.onEventCueEnter);
+        }
+      }
+    }
+    if (!details.hasProgramDateTime) {
+      return;
+    }
+    const {
+      id3Track
+    } = this;
+    const {
+      dateRanges
+    } = details;
+    const ids = Object.keys(dateRanges);
+    let dateRangeCuesAppended = this.dateRangeCuesAppended;
+    // Remove cues from track not found in details.dateRanges
+    if (id3Track && removeOldCues) {
+      var _id3Track$cues;
+      if ((_id3Track$cues = id3Track.cues) != null && _id3Track$cues.length) {
+        const idsToRemove = Object.keys(dateRangeCuesAppended).filter(id => !ids.includes(id));
+        for (let i = idsToRemove.length; i--;) {
+          var _dateRangeCuesAppende;
+          const id = idsToRemove[i];
+          const cues = (_dateRangeCuesAppende = dateRangeCuesAppended[id]) == null ? void 0 : _dateRangeCuesAppende.cues;
+          delete dateRangeCuesAppended[id];
+          if (cues) {
+            Object.keys(cues).forEach(key => {
+              const cue = cues[key];
+              if (cue) {
+                cue.removeEventListener('enter', this.onEventCueEnter);
+                try {
+                  id3Track.removeCue(cue);
+                } catch (e) {
+                  /* no-op */
+                }
+              }
+            });
+          }
+        }
+      } else {
+        dateRangeCuesAppended = this.dateRangeCuesAppended = {};
+      }
+    }
+    // Exit if the playlist does not have Date Ranges or does not have Program Date Time
+    const lastFragment = details.fragments[details.fragments.length - 1];
+    if (ids.length === 0 || !isFiniteNumber(lastFragment == null ? void 0 : lastFragment.programDateTime)) {
+      return;
+    }
+    this.id3Track || (this.id3Track = this.createTrack(this.media));
+    for (let i = 0; i < ids.length; i++) {
+      const id = ids[i];
+      const dateRange = dateRanges[id];
+      const startTime = dateRange.startTime;
+
+      // Process DateRanges to determine end-time (known DURATION, END-DATE, or END-ON-NEXT)
+      const appendedDateRangeCues = dateRangeCuesAppended[id];
+      const cues = (appendedDateRangeCues == null ? void 0 : appendedDateRangeCues.cues) || {};
+      let durationKnown = (appendedDateRangeCues == null ? void 0 : appendedDateRangeCues.durationKnown) || false;
+      let endTime = MAX_CUE_ENDTIME;
+      const {
+        duration,
+        endDate
+      } = dateRange;
+      if (endDate && duration !== null) {
+        endTime = startTime + duration;
+        durationKnown = true;
+      } else if (dateRange.endOnNext && !durationKnown) {
+        const nextDateRangeWithSameClass = ids.reduce((candidateDateRange, id) => {
+          if (id !== dateRange.id) {
+            const otherDateRange = dateRanges[id];
+            if (otherDateRange.class === dateRange.class && otherDateRange.startDate > dateRange.startDate && (!candidateDateRange || dateRange.startDate < candidateDateRange.startDate)) {
+              return otherDateRange;
+            }
+          }
+          return candidateDateRange;
+        }, null);
+        if (nextDateRangeWithSameClass) {
+          endTime = nextDateRangeWithSameClass.startTime;
+          durationKnown = true;
+        }
+      }
+
+      // Create TextTrack Cues for each MetadataGroup Item (select DateRange attribute)
+      // This is to emulate Safari HLS playback handling of DateRange tags
+      const attributes = Object.keys(dateRange.attr);
+      for (let j = 0; j < attributes.length; j++) {
+        const key = attributes[j];
+        if (!isDateRangeCueAttribute(key)) {
+          continue;
+        }
+        const cue = cues[key];
+        if (cue) {
+          if (durationKnown && !(appendedDateRangeCues != null && appendedDateRangeCues.durationKnown)) {
+            cue.endTime = endTime;
+          } else if (Math.abs(cue.startTime - startTime) > 0.01) {
+            cue.startTime = startTime;
+            cue.endTime = endTime;
+          }
+        } else if (Cue) {
+          let data = dateRange.attr[key];
+          if (isSCTE35Attribute(key)) {
+            data = hexToArrayBuffer(data);
+          }
+          const payload = {
+            key,
+            data
+          };
+          const _cue = createCueWithDataFields(Cue, startTime, endTime, payload, MetadataSchema.dateRange);
+          if (_cue) {
+            _cue.id = id;
+            this.id3Track.addCue(_cue);
+            cues[key] = _cue;
+            if (interstitialsController) {
+              if (key === 'X-ASSET-LIST' || key === 'X-ASSET-URL') {
+                _cue.addEventListener('enter', this.onEventCueEnter);
+              }
+            }
+          }
+        }
+      }
+
+      // Keep track of processed DateRanges by ID for updating cues with new DateRange tag attributes
+      dateRangeCuesAppended[id] = {
+        cues,
+        dateRange,
+        durationKnown
+      };
+    }
+  }
+}
+
+class LatencyController {
+  constructor(hls) {
+    this.hls = void 0;
+    this.config = void 0;
+    this.media = null;
+    this.currentTime = 0;
+    this.stallCount = 0;
+    this._latency = null;
+    this._targetLatencyUpdated = false;
+    this.onTimeupdate = () => {
+      const {
+        media
+      } = this;
+      const levelDetails = this.levelDetails;
+      if (!media || !levelDetails) {
+        return;
+      }
+      this.currentTime = media.currentTime;
+      const latency = this.computeLatency();
+      if (latency === null) {
+        return;
+      }
+      this._latency = latency;
+
+      // Adapt playbackRate to meet target latency in low-latency mode
+      const {
+        lowLatencyMode,
+        maxLiveSyncPlaybackRate
+      } = this.config;
+      if (!lowLatencyMode || maxLiveSyncPlaybackRate === 1 || !levelDetails.live) {
+        return;
+      }
+      const targetLatency = this.targetLatency;
+      if (targetLatency === null) {
+        return;
+      }
+      const distanceFromTarget = latency - targetLatency;
+      // Only adjust playbackRate when within one target duration of targetLatency
+      // and more than one second from under-buffering.
+      // Playback further than one target duration from target can be considered DVR playback.
+      const liveMinLatencyDuration = Math.min(this.maxLatency, targetLatency + levelDetails.targetduration);
+      const inLiveRange = distanceFromTarget < liveMinLatencyDuration;
+      if (inLiveRange && distanceFromTarget > 0.05 && this.forwardBufferLength > 1) {
+        const max = Math.min(2, Math.max(1.0, maxLiveSyncPlaybackRate));
+        const rate = Math.round(2 / (1 + Math.exp(-0.75 * distanceFromTarget - this.edgeStalled)) * 20) / 20;
+        const playbackRate = Math.min(max, Math.max(1, rate));
+        this.changeMediaPlaybackRate(media, playbackRate);
+      } else if (media.playbackRate !== 1 && media.playbackRate !== 0) {
+        this.changeMediaPlaybackRate(media, 1);
+      }
+    };
+    this.hls = hls;
+    this.config = hls.config;
+    this.registerListeners();
+  }
+  get levelDetails() {
+    var _this$hls;
+    return ((_this$hls = this.hls) == null ? void 0 : _this$hls.latestLevelDetails) || null;
+  }
+  get latency() {
+    return this._latency || 0;
+  }
+  get maxLatency() {
+    const {
+      config
+    } = this;
+    if (config.liveMaxLatencyDuration !== undefined) {
+      return config.liveMaxLatencyDuration;
+    }
+    const levelDetails = this.levelDetails;
+    return levelDetails ? config.liveMaxLatencyDurationCount * levelDetails.targetduration : 0;
+  }
+  get targetLatency() {
+    const levelDetails = this.levelDetails;
+    if (levelDetails === null || this.hls === null) {
+      return null;
+    }
+    const {
+      holdBack,
+      partHoldBack,
+      targetduration
+    } = levelDetails;
+    const {
+      liveSyncDuration,
+      liveSyncDurationCount,
+      lowLatencyMode
+    } = this.config;
+    const userConfig = this.hls.userConfig;
+    let targetLatency = lowLatencyMode ? partHoldBack || holdBack : holdBack;
+    if (this._targetLatencyUpdated || userConfig.liveSyncDuration || userConfig.liveSyncDurationCount || targetLatency === 0) {
+      targetLatency = liveSyncDuration !== undefined ? liveSyncDuration : liveSyncDurationCount * targetduration;
+    }
+    const maxLiveSyncOnStallIncrease = targetduration;
+    return targetLatency + Math.min(this.stallCount * this.config.liveSyncOnStallIncrease, maxLiveSyncOnStallIncrease);
+  }
+  set targetLatency(latency) {
+    this.stallCount = 0;
+    this.config.liveSyncDuration = latency;
+    this._targetLatencyUpdated = true;
+  }
+  get liveSyncPosition() {
+    const liveEdge = this.estimateLiveEdge();
+    const targetLatency = this.targetLatency;
+    if (liveEdge === null || targetLatency === null) {
+      return null;
+    }
+    const levelDetails = this.levelDetails;
+    if (levelDetails === null) {
+      return null;
+    }
+    const edge = levelDetails.edge;
+    const syncPosition = liveEdge - targetLatency - this.edgeStalled;
+    const min = edge - levelDetails.totalduration;
+    const max = edge - (this.config.lowLatencyMode && levelDetails.partTarget || levelDetails.targetduration);
+    return Math.min(Math.max(min, syncPosition), max);
+  }
+  get drift() {
+    const levelDetails = this.levelDetails;
+    if (levelDetails === null) {
+      return 1;
+    }
+    return levelDetails.drift;
+  }
+  get edgeStalled() {
+    const levelDetails = this.levelDetails;
+    if (levelDetails === null) {
+      return 0;
+    }
+    const maxLevelUpdateAge = (this.config.lowLatencyMode && levelDetails.partTarget || levelDetails.targetduration) * 3;
+    return Math.max(levelDetails.age - maxLevelUpdateAge, 0);
+  }
+  get forwardBufferLength() {
+    const {
+      media
+    } = this;
+    const levelDetails = this.levelDetails;
+    if (!media || !levelDetails) {
+      return 0;
+    }
+    const bufferedRanges = media.buffered.length;
+    return (bufferedRanges ? media.buffered.end(bufferedRanges - 1) : levelDetails.edge) - this.currentTime;
+  }
+  destroy() {
+    this.unregisterListeners();
+    this.onMediaDetaching();
+    this.hls = null;
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    if (!hls) {
+      return;
+    }
+    hls.on(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.on(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    if (!hls) {
+      return;
+    }
+    hls.off(Events.MEDIA_ATTACHED, this.onMediaAttached, this);
+    hls.off(Events.MEDIA_DETACHING, this.onMediaDetaching, this);
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.LEVEL_UPDATED, this.onLevelUpdated, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  onMediaAttached(event, data) {
+    this.media = data.media;
+    this.media.addEventListener('timeupdate', this.onTimeupdate);
+  }
+  onMediaDetaching() {
+    if (this.media) {
+      this.media.removeEventListener('timeupdate', this.onTimeupdate);
+      this.media = null;
+    }
+  }
+  onManifestLoading() {
+    this._latency = null;
+    this.stallCount = 0;
+  }
+  onLevelUpdated(event, {
+    details
+  }) {
+    if (details.advanced) {
+      this.onTimeupdate();
+    }
+    if (!details.live && this.media) {
+      this.media.removeEventListener('timeupdate', this.onTimeupdate);
+    }
+  }
+  onError(event, data) {
+    var _this$levelDetails;
+    if (data.details !== ErrorDetails.BUFFER_STALLED_ERROR) {
+      return;
+    }
+    this.stallCount++;
+    if (this.hls && (_this$levelDetails = this.levelDetails) != null && _this$levelDetails.live) {
+      this.hls.logger.warn('[latency-controller]: Stall detected, adjusting target latency');
+    }
+  }
+  changeMediaPlaybackRate(media, playbackRate) {
+    var _this$hls2, _this$targetLatency;
+    if (media.playbackRate === playbackRate) {
+      return;
+    }
+    (_this$hls2 = this.hls) == null || _this$hls2.logger.debug(`[latency-controller]: latency=${this.latency.toFixed(3)}, targetLatency=${(_this$targetLatency = this.targetLatency) == null ? void 0 : _this$targetLatency.toFixed(3)}, forwardBufferLength=${this.forwardBufferLength.toFixed(3)}: adjusting playback rate from ${media.playbackRate} to ${playbackRate}`);
+    media.playbackRate = playbackRate;
+  }
+  estimateLiveEdge() {
+    const levelDetails = this.levelDetails;
+    if (levelDetails === null) {
+      return null;
+    }
+    return levelDetails.edge + levelDetails.age;
+  }
+  computeLatency() {
+    const liveEdge = this.estimateLiveEdge();
+    if (liveEdge === null) {
+      return null;
+    }
+    return liveEdge - this.currentTime;
+  }
+}
+
+class LevelController extends BasePlaylistController {
+  constructor(hls, contentSteeringController) {
+    super(hls, 'level-controller');
+    this._levels = [];
+    this._firstLevel = -1;
+    this._maxAutoLevel = -1;
+    this._startLevel = void 0;
+    this.currentLevel = null;
+    this.currentLevelIndex = -1;
+    this.manualLevelIndex = -1;
+    this.steering = void 0;
+    this.onParsedComplete = void 0;
+    this.steering = contentSteeringController;
+    this._registerListeners();
+  }
+  _registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.on(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.on(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.on(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+    hls.on(Events.ERROR, this.onError, this);
+  }
+  _unregisterListeners() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.MANIFEST_LOADED, this.onManifestLoaded, this);
+    hls.off(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.off(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.off(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+    hls.off(Events.ERROR, this.onError, this);
+  }
+  destroy() {
+    this._unregisterListeners();
+    this.steering = null;
+    this.resetLevels();
+    super.destroy();
+  }
+  stopLoad() {
+    const levels = this._levels;
+
+    // clean up live level details to force reload them, and reset load errors
+    levels.forEach(level => {
+      level.loadError = 0;
+      level.fragmentError = 0;
+    });
+    super.stopLoad();
+  }
+  resetLevels() {
+    this._startLevel = undefined;
+    this.manualLevelIndex = -1;
+    this.currentLevelIndex = -1;
+    this.currentLevel = null;
+    this._levels = [];
+    this._maxAutoLevel = -1;
+  }
+  onManifestLoading(event, data) {
+    this.resetLevels();
+  }
+  onManifestLoaded(event, data) {
+    const preferManagedMediaSource = this.hls.config.preferManagedMediaSource;
+    const levels = [];
+    const redundantSet = {};
+    const generatePathwaySet = {};
+    let resolutionFound = false;
+    let videoCodecFound = false;
+    let audioCodecFound = false;
+    data.levels.forEach(levelParsed => {
+      const attributes = levelParsed.attrs;
+      let {
+        audioCodec,
+        videoCodec
+      } = levelParsed;
+      if (audioCodec) {
+        // Returns empty and set to undefined for 'mp4a.40.34' with fallback to 'audio/mpeg' SourceBuffer
+        levelParsed.audioCodec = audioCodec = getCodecCompatibleName(audioCodec, preferManagedMediaSource) || undefined;
+      }
+      if (videoCodec) {
+        videoCodec = levelParsed.videoCodec = convertAVC1ToAVCOTI(videoCodec);
+      }
+
+      // only keep levels with supported audio/video codecs
+      const {
+        width,
+        height,
+        unknownCodecs
+      } = levelParsed;
+      const unknownUnsupportedCodecCount = (unknownCodecs == null ? void 0 : unknownCodecs.length) || 0;
+      resolutionFound || (resolutionFound = !!(width && height));
+      videoCodecFound || (videoCodecFound = !!videoCodec);
+      audioCodecFound || (audioCodecFound = !!audioCodec);
+      if (unknownUnsupportedCodecCount || audioCodec && !this.isAudioSupported(audioCodec) || videoCodec && !this.isVideoSupported(videoCodec)) {
+        this.log(`Some or all CODECS not supported "${attributes.CODECS}"`);
+        return;
+      }
+      const {
+        CODECS,
+        'FRAME-RATE': FRAMERATE,
+        'HDCP-LEVEL': HDCP,
+        'PATHWAY-ID': PATHWAY,
+        RESOLUTION,
+        'VIDEO-RANGE': VIDEO_RANGE
+      } = attributes;
+      const contentSteeringPrefix = `${PATHWAY || '.'}-`;
+      const levelKey = `${contentSteeringPrefix}${levelParsed.bitrate}-${RESOLUTION}-${FRAMERATE}-${CODECS}-${VIDEO_RANGE}-${HDCP}`;
+      if (!redundantSet[levelKey]) {
+        const level = this.createLevel(levelParsed);
+        redundantSet[levelKey] = level;
+        generatePathwaySet[levelKey] = 1;
+        levels.push(level);
+      } else if (redundantSet[levelKey].uri !== levelParsed.url && !levelParsed.attrs['PATHWAY-ID']) {
+        // Assign Pathway IDs to Redundant Streams (default Pathways is ".". Redundant Streams "..", "...", and so on.)
+        // Content Steering controller to handles Pathway fallback on error
+        const pathwayCount = generatePathwaySet[levelKey] += 1;
+        levelParsed.attrs['PATHWAY-ID'] = new Array(pathwayCount + 1).join('.');
+        const level = this.createLevel(levelParsed);
+        redundantSet[levelKey] = level;
+        levels.push(level);
+      } else {
+        redundantSet[levelKey].addGroupId('audio', attributes.AUDIO);
+        redundantSet[levelKey].addGroupId('text', attributes.SUBTITLES);
+      }
+    });
+    this.filterAndSortMediaOptions(levels, data, resolutionFound, videoCodecFound, audioCodecFound);
+  }
+  createLevel(levelParsed) {
+    const level = new Level(levelParsed);
+    const supplemental = levelParsed.supplemental;
+    if (supplemental != null && supplemental.videoCodec && !this.isVideoSupported(supplemental.videoCodec)) {
+      const error = new Error(`SUPPLEMENTAL-CODECS not supported "${supplemental.videoCodec}"`);
+      this.log(error.message);
+      level.supportedResult = getUnsupportedResult(error, []);
+    }
+    return level;
+  }
+  isAudioSupported(codec) {
+    return areCodecsMediaSourceSupported(codec, 'audio', this.hls.config.preferManagedMediaSource);
+  }
+  isVideoSupported(codec) {
+    return areCodecsMediaSourceSupported(codec, 'video', this.hls.config.preferManagedMediaSource);
+  }
+  filterAndSortMediaOptions(filteredLevels, data, resolutionFound, videoCodecFound, audioCodecFound) {
+    var _data$stats;
+    let audioTracks = [];
+    let subtitleTracks = [];
+    let levels = filteredLevels;
+    const statsParsing = ((_data$stats = data.stats) == null ? void 0 : _data$stats.parsing) || {};
+
+    // remove audio-only and invalid video-range levels if we also have levels with video codecs or RESOLUTION signalled
+    if ((resolutionFound || videoCodecFound) && audioCodecFound) {
+      levels = levels.filter(({
+        videoCodec,
+        videoRange,
+        width,
+        height
+      }) => (!!videoCodec || !!(width && height)) && isVideoRange(videoRange));
+    }
+    if (levels.length === 0) {
+      // Dispatch error after MANIFEST_LOADED is done propagating
+      // eslint-disable-next-line @typescript-eslint/no-floating-promises
+      Promise.resolve().then(() => {
+        if (this.hls) {
+          let message = 'no level with compatible codecs found in manifest';
+          let reason = message;
+          if (data.levels.length) {
+            reason = `one or more CODECS in variant not supported: ${stringify(data.levels.map(level => level.attrs.CODECS).filter((value, index, array) => array.indexOf(value) === index))}`;
+            this.warn(reason);
+            message += ` (${reason})`;
+          }
+          const error = new Error(message);
+          this.hls.trigger(Events.ERROR, {
+            type: ErrorTypes.MEDIA_ERROR,
+            details: ErrorDetails.MANIFEST_INCOMPATIBLE_CODECS_ERROR,
+            fatal: true,
+            url: data.url,
+            error,
+            reason
+          });
+        }
+      });
+      statsParsing.end = performance.now();
+      return;
+    }
+    if (data.audioTracks) {
+      audioTracks = data.audioTracks.filter(track => !track.audioCodec || this.isAudioSupported(track.audioCodec));
+      // Assign ids after filtering as array indices by group-id
+      assignTrackIdsByGroup(audioTracks);
+    }
+    if (data.subtitles) {
+      subtitleTracks = data.subtitles;
+      assignTrackIdsByGroup(subtitleTracks);
+    }
+    // start bitrate is the first bitrate of the manifest
+    const unsortedLevels = levels.slice(0);
+    // sort levels from lowest to highest
+    levels.sort((a, b) => {
+      if (a.attrs['HDCP-LEVEL'] !== b.attrs['HDCP-LEVEL']) {
+        return (a.attrs['HDCP-LEVEL'] || '') > (b.attrs['HDCP-LEVEL'] || '') ? 1 : -1;
+      }
+      // sort on height before bitrate for cap-level-controller
+      if (resolutionFound && a.height !== b.height) {
+        return a.height - b.height;
+      }
+      if (a.frameRate !== b.frameRate) {
+        return a.frameRate - b.frameRate;
+      }
+      if (a.videoRange !== b.videoRange) {
+        return VideoRangeValues.indexOf(a.videoRange) - VideoRangeValues.indexOf(b.videoRange);
+      }
+      if (a.videoCodec !== b.videoCodec) {
+        const valueA = videoCodecPreferenceValue(a.videoCodec);
+        const valueB = videoCodecPreferenceValue(b.videoCodec);
+        if (valueA !== valueB) {
+          return valueB - valueA;
+        }
+      }
+      if (a.uri === b.uri && a.codecSet !== b.codecSet) {
+        const valueA = codecsSetSelectionPreferenceValue(a.codecSet);
+        const valueB = codecsSetSelectionPreferenceValue(b.codecSet);
+        if (valueA !== valueB) {
+          return valueB - valueA;
+        }
+      }
+      if (a.averageBitrate !== b.averageBitrate) {
+        return a.averageBitrate - b.averageBitrate;
+      }
+      return 0;
+    });
+    let firstLevelInPlaylist = unsortedLevels[0];
+    if (this.steering) {
+      levels = this.steering.filterParsedLevels(levels);
+      if (levels.length !== unsortedLevels.length) {
+        for (let i = 0; i < unsortedLevels.length; i++) {
+          if (unsortedLevels[i].pathwayId === levels[0].pathwayId) {
+            firstLevelInPlaylist = unsortedLevels[i];
+            break;
+          }
+        }
+      }
+    }
+    this._levels = levels;
+
+    // find index of first level in sorted levels
+    for (let i = 0; i < levels.length; i++) {
+      if (levels[i] === firstLevelInPlaylist) {
+        var _this$hls$userConfig;
+        this._firstLevel = i;
+        const firstLevelBitrate = firstLevelInPlaylist.bitrate;
+        const bandwidthEstimate = this.hls.bandwidthEstimate;
+        this.log(`manifest loaded, ${levels.length} level(s) found, first bitrate: ${firstLevelBitrate}`);
+        // Update default bwe to first variant bitrate as long it has not been configured or set
+        if (((_this$hls$userConfig = this.hls.userConfig) == null ? void 0 : _this$hls$userConfig.abrEwmaDefaultEstimate) === undefined) {
+          const startingBwEstimate = Math.min(firstLevelBitrate, this.hls.config.abrEwmaDefaultEstimateMax);
+          if (startingBwEstimate > bandwidthEstimate && bandwidthEstimate === this.hls.abrEwmaDefaultEstimate) {
+            this.hls.bandwidthEstimate = startingBwEstimate;
+          }
+        }
+        break;
+      }
+    }
+
+    // Audio is only alternate if manifest include a URI along with the audio group tag,
+    // and this is not an audio-only stream where levels contain audio-only
+    const audioOnly = audioCodecFound && !videoCodecFound;
+    const config = this.hls.config;
+    const altAudioEnabled = !!(config.audioStreamController && config.audioTrackController);
+    const edata = {
+      levels,
+      audioTracks,
+      subtitleTracks,
+      sessionData: data.sessionData,
+      sessionKeys: data.sessionKeys,
+      firstLevel: this._firstLevel,
+      stats: data.stats,
+      audio: audioCodecFound,
+      video: videoCodecFound,
+      altAudio: altAudioEnabled && !audioOnly && audioTracks.some(t => !!t.url)
+    };
+    statsParsing.end = performance.now();
+    this.hls.trigger(Events.MANIFEST_PARSED, edata);
+  }
+  get levels() {
+    if (this._levels.length === 0) {
+      return null;
+    }
+    return this._levels;
+  }
+  get loadLevelObj() {
+    return this.currentLevel;
+  }
+  get level() {
+    return this.currentLevelIndex;
+  }
+  set level(newLevel) {
+    const levels = this._levels;
+    if (levels.length === 0) {
+      return;
+    }
+    // check if level idx is valid
+    if (newLevel < 0 || newLevel >= levels.length) {
+      // invalid level id given, trigger error
+      const error = new Error('invalid level idx');
+      const fatal = newLevel < 0;
+      this.hls.trigger(Events.ERROR, {
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.LEVEL_SWITCH_ERROR,
+        level: newLevel,
+        fatal,
+        error,
+        reason: error.message
+      });
+      if (fatal) {
+        return;
+      }
+      newLevel = Math.min(newLevel, levels.length - 1);
+    }
+    const lastLevelIndex = this.currentLevelIndex;
+    const lastLevel = this.currentLevel;
+    const lastPathwayId = lastLevel ? lastLevel.attrs['PATHWAY-ID'] : undefined;
+    const level = levels[newLevel];
+    const pathwayId = level.attrs['PATHWAY-ID'];
+    this.currentLevelIndex = newLevel;
+    this.currentLevel = level;
+    if (lastLevelIndex === newLevel && lastLevel && lastPathwayId === pathwayId) {
+      return;
+    }
+    this.log(`Switching to level ${newLevel} (${level.height ? level.height + 'p ' : ''}${level.videoRange ? level.videoRange + ' ' : ''}${level.codecSet ? level.codecSet + ' ' : ''}@${level.bitrate})${pathwayId ? ' with Pathway ' + pathwayId : ''} from level ${lastLevelIndex}${lastPathwayId ? ' with Pathway ' + lastPathwayId : ''}`);
+    const levelSwitchingData = {
+      level: newLevel,
+      attrs: level.attrs,
+      details: level.details,
+      bitrate: level.bitrate,
+      averageBitrate: level.averageBitrate,
+      maxBitrate: level.maxBitrate,
+      realBitrate: level.realBitrate,
+      width: level.width,
+      height: level.height,
+      codecSet: level.codecSet,
+      audioCodec: level.audioCodec,
+      videoCodec: level.videoCodec,
+      audioGroups: level.audioGroups,
+      subtitleGroups: level.subtitleGroups,
+      loaded: level.loaded,
+      loadError: level.loadError,
+      fragmentError: level.fragmentError,
+      name: level.name,
+      id: level.id,
+      uri: level.uri,
+      url: level.url,
+      urlId: 0,
+      audioGroupIds: level.audioGroupIds,
+      textGroupIds: level.textGroupIds
+    };
+    this.hls.trigger(Events.LEVEL_SWITCHING, levelSwitchingData);
+    // check if we need to load playlist for this level
+    const levelDetails = level.details;
+    if (!levelDetails || levelDetails.live) {
+      // level not retrieved yet, or live playlist we need to (re)load it
+      const hlsUrlParameters = this.switchParams(level.uri, lastLevel == null ? void 0 : lastLevel.details, levelDetails);
+      this.loadPlaylist(hlsUrlParameters);
+    }
+  }
+  get manualLevel() {
+    return this.manualLevelIndex;
+  }
+  set manualLevel(newLevel) {
+    this.manualLevelIndex = newLevel;
+    if (this._startLevel === undefined) {
+      this._startLevel = newLevel;
+    }
+    if (newLevel !== -1) {
+      this.level = newLevel;
+    }
+  }
+  get firstLevel() {
+    return this._firstLevel;
+  }
+  set firstLevel(newLevel) {
+    this._firstLevel = newLevel;
+  }
+  get startLevel() {
+    // Setting hls.startLevel (this._startLevel) overrides config.startLevel
+    if (this._startLevel === undefined) {
+      const configStartLevel = this.hls.config.startLevel;
+      if (configStartLevel !== undefined) {
+        return configStartLevel;
+      }
+      return this.hls.firstAutoLevel;
+    }
+    return this._startLevel;
+  }
+  set startLevel(newLevel) {
+    this._startLevel = newLevel;
+  }
+  get pathways() {
+    if (this.steering) {
+      return this.steering.pathways();
+    }
+    return [];
+  }
+  get pathwayPriority() {
+    if (this.steering) {
+      return this.steering.pathwayPriority;
+    }
+    return null;
+  }
+  set pathwayPriority(pathwayPriority) {
+    if (this.steering) {
+      const pathwaysList = this.steering.pathways();
+      const filteredPathwayPriority = pathwayPriority.filter(pathwayId => {
+        return pathwaysList.indexOf(pathwayId) !== -1;
+      });
+      if (pathwayPriority.length < 1) {
+        this.warn(`pathwayPriority ${pathwayPriority} should contain at least one pathway from list: ${pathwaysList}`);
+        return;
+      }
+      this.steering.pathwayPriority = filteredPathwayPriority;
+    }
+  }
+  onError(event, data) {
+    if (data.fatal || !data.context) {
+      return;
+    }
+    if (data.context.type === PlaylistContextType.LEVEL && data.context.level === this.level) {
+      this.checkRetry(data);
+    }
+  }
+
+  // reset errors on the successful load of a fragment
+  onFragBuffered(event, {
+    frag
+  }) {
+    if (frag !== undefined && frag.type === PlaylistLevelType.MAIN) {
+      const el = frag.elementaryStreams;
+      if (!Object.keys(el).some(type => !!el[type])) {
+        return;
+      }
+      const level = this._levels[frag.level];
+      if (level != null && level.loadError) {
+        this.log(`Resetting level error count of ${level.loadError} on frag buffered`);
+        level.loadError = 0;
+      }
+    }
+  }
+  onLevelLoaded(event, data) {
+    var _data$deliveryDirecti2;
+    const {
+      level,
+      details
+    } = data;
+    const curLevel = data.levelInfo;
+    if (!curLevel) {
+      var _data$deliveryDirecti;
+      this.warn(`Invalid level index ${level}`);
+      if ((_data$deliveryDirecti = data.deliveryDirectives) != null && _data$deliveryDirecti.skip) {
+        details.deltaUpdateFailed = true;
+      }
+      return;
+    }
+
+    // only process level loaded events matching with expected level or prior to switch when media playlist is loaded directly
+    if (curLevel === this.currentLevel || data.withoutMultiVariant) {
+      // reset level load error counter on successful level loaded only if there is no issues with fragments
+      if (curLevel.fragmentError === 0) {
+        curLevel.loadError = 0;
+      }
+      // Ignore matching details populated by loading a Media Playlist directly
+      let previousDetails = curLevel.details;
+      if (previousDetails === data.details && previousDetails.advanced) {
+        previousDetails = undefined;
+      }
+      this.playlistLoaded(level, data, previousDetails);
+    } else if ((_data$deliveryDirecti2 = data.deliveryDirectives) != null && _data$deliveryDirecti2.skip) {
+      // received a delta playlist update that cannot be merged
+      details.deltaUpdateFailed = true;
+    }
+  }
+  loadPlaylist(hlsUrlParameters) {
+    super.loadPlaylist();
+    if (this.shouldLoadPlaylist(this.currentLevel)) {
+      this.scheduleLoading(this.currentLevel, hlsUrlParameters);
+    }
+  }
+  loadingPlaylist(currentLevel, hlsUrlParameters) {
+    super.loadingPlaylist(currentLevel, hlsUrlParameters);
+    const url = this.getUrlWithDirectives(currentLevel.uri, hlsUrlParameters);
+    const currentLevelIndex = this.currentLevelIndex;
+    const pathwayId = currentLevel.attrs['PATHWAY-ID'];
+    const details = currentLevel.details;
+    const age = details == null ? void 0 : details.age;
+    this.log(`Loading level index ${currentLevelIndex}${(hlsUrlParameters == null ? void 0 : hlsUrlParameters.msn) !== undefined ? ' at sn ' + hlsUrlParameters.msn + ' part ' + hlsUrlParameters.part : ''}${pathwayId ? ' Pathway ' + pathwayId : ''}${age && details.live ? ' age ' + age.toFixed(1) + (details.type ? ' ' + details.type || '' : '') : ''} ${url}`);
+    this.hls.trigger(Events.LEVEL_LOADING, {
+      url,
+      level: currentLevelIndex,
+      levelInfo: currentLevel,
+      pathwayId: currentLevel.attrs['PATHWAY-ID'],
+      id: 0,
+      // Deprecated Level urlId
+      deliveryDirectives: hlsUrlParameters || null
+    });
+  }
+  get nextLoadLevel() {
+    if (this.manualLevelIndex !== -1) {
+      return this.manualLevelIndex;
+    } else {
+      return this.hls.nextAutoLevel;
+    }
+  }
+  set nextLoadLevel(nextLevel) {
+    this.level = nextLevel;
+    if (this.manualLevelIndex === -1) {
+      this.hls.nextAutoLevel = nextLevel;
+    }
+  }
+  removeLevel(levelIndex) {
+    var _this$currentLevel;
+    if (this._levels.length === 1) {
+      return;
+    }
+    const levels = this._levels.filter((level, index) => {
+      if (index !== levelIndex) {
+        return true;
+      }
+      if (this.steering) {
+        this.steering.removeLevel(level);
+      }
+      if (level === this.currentLevel) {
+        this.currentLevel = null;
+        this.currentLevelIndex = -1;
+        if (level.details) {
+          level.details.fragments.forEach(f => f.level = -1);
+        }
+      }
+      return false;
+    });
+    reassignFragmentLevelIndexes(levels);
+    this._levels = levels;
+    if (this.currentLevelIndex > -1 && (_this$currentLevel = this.currentLevel) != null && _this$currentLevel.details) {
+      this.currentLevelIndex = this.currentLevel.details.fragments[0].level;
+    }
+    if (this.manualLevelIndex > -1) {
+      this.manualLevelIndex = this.currentLevelIndex;
+    }
+    const maxLevel = levels.length - 1;
+    this._firstLevel = Math.min(this._firstLevel, maxLevel);
+    if (this._startLevel) {
+      this._startLevel = Math.min(this._startLevel, maxLevel);
+    }
+    this.hls.trigger(Events.LEVELS_UPDATED, {
+      levels
+    });
+  }
+  onLevelsUpdated(event, {
+    levels
+  }) {
+    this._levels = levels;
+  }
+  checkMaxAutoUpdated() {
+    const {
+      autoLevelCapping,
+      maxAutoLevel,
+      maxHdcpLevel
+    } = this.hls;
+    if (this._maxAutoLevel !== maxAutoLevel) {
+      this._maxAutoLevel = maxAutoLevel;
+      this.hls.trigger(Events.MAX_AUTO_LEVEL_UPDATED, {
+        autoLevelCapping,
+        levels: this.levels,
+        maxAutoLevel,
+        minAutoLevel: this.hls.minAutoLevel,
+        maxHdcpLevel
+      });
+    }
+  }
+}
+function assignTrackIdsByGroup(tracks) {
+  const groups = {};
+  tracks.forEach(track => {
+    const groupId = track.groupId || '';
+    track.id = groups[groupId] = groups[groupId] || 0;
+    groups[groupId]++;
+  });
+}
+
+function getSourceBuffer() {
+  return self.SourceBuffer || self.WebKitSourceBuffer;
+}
+function isMSESupported() {
+  const mediaSource = getMediaSource();
+  if (!mediaSource) {
+    return false;
+  }
+
+  // if SourceBuffer is exposed ensure its API is valid
+  // Older browsers do not expose SourceBuffer globally so checking SourceBuffer.prototype is impossible
+  const sourceBuffer = getSourceBuffer();
+  return !sourceBuffer || sourceBuffer.prototype && typeof sourceBuffer.prototype.appendBuffer === 'function' && typeof sourceBuffer.prototype.remove === 'function';
+}
+function isSupported() {
+  if (!isMSESupported()) {
+    return false;
+  }
+  const mediaSource = getMediaSource();
+  return typeof (mediaSource == null ? void 0 : mediaSource.isTypeSupported) === 'function' && (['avc1.42E01E,mp4a.40.2', 'av01.0.01M.08', 'vp09.00.50.08'].some(codecsForVideoContainer => mediaSource.isTypeSupported(mimeTypeForCodec(codecsForVideoContainer, 'video'))) || ['mp4a.40.2', 'fLaC'].some(codecForAudioContainer => mediaSource.isTypeSupported(mimeTypeForCodec(codecForAudioContainer, 'audio'))));
+}
+function changeTypeSupported() {
+  var _sourceBuffer$prototy;
+  const sourceBuffer = getSourceBuffer();
+  return typeof (sourceBuffer == null || (_sourceBuffer$prototy = sourceBuffer.prototype) == null ? void 0 : _sourceBuffer$prototy.changeType) === 'function';
+}
+
+const TICK_INTERVAL = 100; // how often to tick in ms
+
+class StreamController extends BaseStreamController {
+  constructor(hls, fragmentTracker, keyLoader) {
+    super(hls, fragmentTracker, keyLoader, 'stream-controller', PlaylistLevelType.MAIN);
+    this.audioCodecSwap = false;
+    this.level = -1;
+    this._forceStartLoad = false;
+    this._hasEnoughToStart = false;
+    this.altAudio = 0;
+    this.audioOnly = false;
+    this.fragPlaying = null;
+    this.fragLastKbps = 0;
+    this.couldBacktrack = false;
+    this.backtrackFragment = null;
+    this.audioCodecSwitch = false;
+    this.videoBuffer = null;
+    this.onMediaPlaying = () => {
+      // tick to speed up FRAG_CHANGED triggering
+      this.tick();
+    };
+    this.onMediaSeeked = () => {
+      const media = this.media;
+      const currentTime = media ? media.currentTime : null;
+      if (currentTime === null || !isFiniteNumber(currentTime)) {
+        return;
+      }
+      this.log(`Media seeked to ${currentTime.toFixed(3)}`);
+
+      // If seeked was issued before buffer was appended do not tick immediately
+      if (!this.getBufferedFrag(currentTime)) {
+        return;
+      }
+      const bufferInfo = this.getFwdBufferInfoAtPos(media, currentTime, PlaylistLevelType.MAIN, 0);
+      if (bufferInfo === null || bufferInfo.len === 0) {
+        this.warn(`Main forward buffer length at ${currentTime} on "seeked" event ${bufferInfo ? bufferInfo.len : 'empty'})`);
+        return;
+      }
+
+      // tick to speed up FRAG_CHANGED triggering
+      this.tick();
+    };
+    this.registerListeners();
+  }
+  registerListeners() {
+    super.registerListeners();
+    const {
+      hls
+    } = this;
+    hls.on(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.on(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.on(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.on(Events.FRAG_LOAD_EMERGENCY_ABORTED, this.onFragLoadEmergencyAborted, this);
+    hls.on(Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
+    hls.on(Events.AUDIO_TRACK_SWITCHED, this.onAudioTrackSwitched, this);
+    hls.on(Events.BUFFER_CREATED, this.onBufferCreated, this);
+    hls.on(Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
+    hls.on(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.on(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+  }
+  unregisterListeners() {
+    super.unregisterListeners();
+    const {
+      hls
+    } = this;
+    hls.off(Events.MANIFEST_PARSED, this.onManifestParsed, this);
+    hls.off(Events.LEVEL_LOADED, this.onLevelLoaded, this);
+    hls.off(Events.FRAG_LOAD_EMERGENCY_ABORTED, this.onFragLoadEmergencyAborted, this);
+    hls.off(Events.AUDIO_TRACK_SWITCHING, this.onAudioTrackSwitching, this);
+    hls.off(Events.AUDIO_TRACK_SWITCHED, this.onAudioTrackSwitched, this);
+    hls.off(Events.BUFFER_CREATED, this.onBufferCreated, this);
+    hls.off(Events.BUFFER_FLUSHED, this.onBufferFlushed, this);
+    hls.off(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+    hls.off(Events.FRAG_BUFFERED, this.onFragBuffered, this);
+  }
+  onHandlerDestroying() {
+    // @ts-ignore
+    this.onMediaPlaying = this.onMediaSeeked = null;
+    this.unregisterListeners();
+    super.onHandlerDestroying();
+  }
+  startLoad(startPosition, skipSeekToStartPosition) {
+    if (this.levels) {
+      const {
+        lastCurrentTime,
+        hls
+      } = this;
+      this.stopLoad();
+      this.setInterval(TICK_INTERVAL);
+      this.level = -1;
+      if (!this.startFragRequested) {
+        // determine load level
+        let startLevel = hls.startLevel;
+        if (startLevel === -1) {
+          if (hls.config.testBandwidth && this.levels.length > 1) {
+            // -1 : guess start Level by doing a bitrate test by loading first fragment of lowest quality level
+            startLevel = 0;
+            this.bitrateTest = true;
+          } else {
+            startLevel = hls.firstAutoLevel;
+          }
+        }
+        // set new level to playlist loader : this will trigger start level load
+        // hls.nextLoadLevel remains until it is set to a new value or until a new frag is successfully loaded
+        hls.nextLoadLevel = startLevel;
+        this.level = hls.loadLevel;
+        this._hasEnoughToStart = !!skipSeekToStartPosition;
+      }
+      // if startPosition undefined but lastCurrentTime set, set startPosition to last currentTime
+      if (lastCurrentTime > 0 && startPosition === -1 && !skipSeekToStartPosition) {
+        this.log(`Override startPosition with lastCurrentTime @${lastCurrentTime.toFixed(3)}`);
+        startPosition = lastCurrentTime;
+      }
+      this.state = State.IDLE;
+      this.nextLoadPosition = this.lastCurrentTime = startPosition + this.timelineOffset;
+      this.startPosition = skipSeekToStartPosition ? -1 : startPosition;
+      this.tick();
+    } else {
+      this._forceStartLoad = true;
+      this.state = State.STOPPED;
+    }
+  }
+  stopLoad() {
+    this._forceStartLoad = false;
+    super.stopLoad();
+  }
+  doTick() {
+    switch (this.state) {
+      case State.WAITING_LEVEL:
+        {
+          const {
+            levels,
+            level
+          } = this;
+          const currentLevel = levels == null ? void 0 : levels[level];
+          const details = currentLevel == null ? void 0 : currentLevel.details;
+          if (details && (!details.live || this.levelLastLoaded === currentLevel && !this.waitForLive(currentLevel))) {
+            if (this.waitForCdnTuneIn(details)) {
+              break;
+            }
+            this.state = State.IDLE;
+            break;
+          } else if (this.hls.nextLoadLevel !== this.level) {
+            this.state = State.IDLE;
+            break;
+          }
+          break;
+        }
+      case State.FRAG_LOADING_WAITING_RETRY:
+        this.checkRetryDate();
+        break;
+    }
+    if (this.state === State.IDLE) {
+      this.doTickIdle();
+    }
+    this.onTickEnd();
+  }
+  onTickEnd() {
+    var _this$media;
+    super.onTickEnd();
+    if ((_this$media = this.media) != null && _this$media.readyState && this.media.seeking === false) {
+      this.lastCurrentTime = this.media.currentTime;
+    }
+    this.checkFragmentChanged();
+  }
+  doTickIdle() {
+    const {
+      hls,
+      levelLastLoaded,
+      levels,
+      media
+    } = this;
+
+    // if start level not parsed yet OR
+    // if video not attached AND start fragment already requested OR start frag prefetch not enabled
+    // exit loop, as we either need more info (level not parsed) or we need media to be attached to load new fragment
+    if (levelLastLoaded === null || !media && !this.primaryPrefetch && (this.startFragRequested || !hls.config.startFragPrefetch)) {
+      return;
+    }
+
+    // If the "main" level is audio-only but we are loading an alternate track in the same group, do not load anything
+    if (this.altAudio && this.audioOnly) {
+      return;
+    }
+    const level = this.buffering ? hls.nextLoadLevel : hls.loadLevel;
+    if (!(levels != null && levels[level])) {
+      return;
+    }
+    const levelInfo = levels[level];
+
+    // if buffer length is less than maxBufLen try to load a new fragment
+
+    const bufferInfo = this.getMainFwdBufferInfo();
+    if (bufferInfo === null) {
+      return;
+    }
+    const lastDetails = this.getLevelDetails();
+    if (lastDetails && this._streamEnded(bufferInfo, lastDetails)) {
+      const data = {};
+      if (this.altAudio === 2) {
+        data.type = 'video';
+      }
+      this.hls.trigger(Events.BUFFER_EOS, data);
+      this.state = State.ENDED;
+      return;
+    }
+    if (!this.buffering) {
+      return;
+    }
+
+    // set next load level : this will trigger a playlist load if needed
+    if (hls.loadLevel !== level && hls.manualLevel === -1) {
+      this.log(`Adapting to level ${level} from level ${this.level}`);
+    }
+    this.level = hls.nextLoadLevel = level;
+    const levelDetails = levelInfo.details;
+    // if level info not retrieved yet, switch state and wait for level retrieval
+    // if live playlist, ensure that new playlist has been refreshed to avoid loading/try to load
+    // a useless and outdated fragment (that might even introduce load error if it is already out of the live playlist)
+    if (!levelDetails || this.state === State.WAITING_LEVEL || this.waitForLive(levelInfo)) {
+      this.level = level;
+      this.state = State.WAITING_LEVEL;
+      this.startFragRequested = false;
+      return;
+    }
+    const bufferLen = bufferInfo.len;
+
+    // compute max Buffer Length that we could get from this load level, based on level bitrate. don't buffer more than 60 MB and more than 30s
+    const maxBufLen = this.getMaxBufferLength(levelInfo.maxBitrate);
+
+    // Stay idle if we are still with buffer margins
+    if (bufferLen >= maxBufLen) {
+      return;
+    }
+    if (this.backtrackFragment && this.backtrackFragment.start > bufferInfo.end) {
+      this.backtrackFragment = null;
+    }
+    const targetBufferTime = this.backtrackFragment ? this.backtrackFragment.start : bufferInfo.end;
+    let frag = this.getNextFragment(targetBufferTime, levelDetails);
+    // Avoid backtracking by loading an earlier segment in streams with segments that do not start with a key frame (flagged by `couldBacktrack`)
+    if (this.couldBacktrack && !this.fragPrevious && frag && isMediaFragment(frag) && this.fragmentTracker.getState(frag) !== FragmentState.OK) {
+      var _this$backtrackFragme;
+      const backtrackSn = ((_this$backtrackFragme = this.backtrackFragment) != null ? _this$backtrackFragme : frag).sn;
+      const fragIdx = backtrackSn - levelDetails.startSN;
+      const backtrackFrag = levelDetails.fragments[fragIdx - 1];
+      if (backtrackFrag && frag.cc === backtrackFrag.cc) {
+        frag = backtrackFrag;
+        this.fragmentTracker.removeFragment(backtrackFrag);
+      }
+    } else if (this.backtrackFragment && bufferInfo.len) {
+      this.backtrackFragment = null;
+    }
+    // Avoid loop loading by using nextLoadPosition set for backtracking and skipping consecutive GAP tags
+    if (frag && this.isLoopLoading(frag, targetBufferTime)) {
+      const gapStart = frag.gap;
+      if (!gapStart) {
+        // Cleanup the fragment tracker before trying to find the next unbuffered fragment
+        const type = this.audioOnly && !this.altAudio ? ElementaryStreamTypes.AUDIO : ElementaryStreamTypes.VIDEO;
+        const mediaBuffer = (type === ElementaryStreamTypes.VIDEO ? this.videoBuffer : this.mediaBuffer) || this.media;
+        if (mediaBuffer) {
+          this.afterBufferFlushed(mediaBuffer, type, PlaylistLevelType.MAIN);
+        }
+      }
+      frag = this.getNextFragmentLoopLoading(frag, levelDetails, bufferInfo, PlaylistLevelType.MAIN, maxBufLen);
+    }
+    if (!frag) {
+      return;
+    }
+    if (this.exceedsMaxBuffer(bufferInfo, maxBufLen, frag)) {
+      return;
+    }
+    if (frag.initSegment && !frag.initSegment.data && !this.bitrateTest) {
+      frag = frag.initSegment;
+    }
+    this.loadFragment(frag, levelInfo, targetBufferTime);
+  }
+  loadFragment(frag, level, targetBufferTime) {
+    // Check if fragment is not loaded
+    const fragState = this.fragmentTracker.getState(frag);
+    if (fragState === FragmentState.NOT_LOADED || fragState === FragmentState.PARTIAL) {
+      if (!isMediaFragment(frag)) {
+        this._loadInitSegment(frag, level);
+      } else if (this.bitrateTest) {
+        this.log(`Fragment ${frag.sn} of level ${frag.level} is being downloaded to test bitrate and will not be buffered`);
+        this._loadBitrateTestFrag(frag, level);
+      } else {
+        super.loadFragment(frag, level, targetBufferTime);
+      }
+    } else {
+      this.clearTrackerIfNeeded(frag);
+    }
+  }
+  getBufferedFrag(position) {
+    return this.fragmentTracker.getBufferedFrag(position, PlaylistLevelType.MAIN);
+  }
+  followingBufferedFrag(frag) {
+    if (frag) {
+      // try to get range of next fragment (500ms after this range)
+      return this.getBufferedFrag(frag.end + 0.5);
+    }
+    return null;
+  }
+
+  /*
+    on immediate level switch :
+     - pause playback if playing
+     - cancel any pending load request
+     - and trigger a buffer flush
+  */
+  immediateLevelSwitch() {
+    this.abortCurrentFrag();
+    this.flushMainBuffer(0, Number.POSITIVE_INFINITY);
+    if (this.altAudio !== 0) {
+      var _this$getLevelDetails;
+      // If behind the live window, remove audio too to keep buffered media aligned
+      const liveWindowStart = ((_this$getLevelDetails = this.getLevelDetails()) == null ? void 0 : _this$getLevelDetails.fragmentStart) || 0;
+      if (liveWindowStart > this.lastCurrentTime) {
+        super.flushMainBuffer(0, Number.POSITIVE_INFINITY, 'audio');
+      }
+    }
+  }
+
+  /**
+   * try to switch ASAP without breaking video playback:
+   * in order to ensure smooth but quick level switching,
+   * we need to find the next flushable buffer range
+   * we should take into account new segment fetch time
+   */
+  nextLevelSwitch() {
+    const {
+      levels,
+      media
+    } = this;
+    // ensure that media is defined and that metadata are available (to retrieve currentTime)
+    if (media != null && media.readyState) {
+      let fetchdelay;
+      const fragPlayingCurrent = this.getAppendedFrag(media.currentTime);
+      if (fragPlayingCurrent && fragPlayingCurrent.start > 1) {
+        // flush buffer preceding current fragment (flush until current fragment start offset)
+        // minus 1s to avoid video freezing, that could happen if we flush keyframe of current video ...
+        this.flushMainBuffer(0, fragPlayingCurrent.start - 1);
+      }
+      const levelDetails = this.getLevelDetails();
+      if (levelDetails != null && levelDetails.live) {
+        const bufferInfo = this.getMainFwdBufferInfo();
+        // Do not flush in live stream with low buffer
+        if (!bufferInfo || bufferInfo.len < levelDetails.targetduration * 2) {
+          return;
+        }
+      }
+      if (!media.paused && levels) {
+        // add a safety delay of 1s
+        const nextLevelId = this.hls.nextLoadLevel;
+        const nextLevel = levels[nextLevelId];
+        const fragLastKbps = this.fragLastKbps;
+        if (fragLastKbps && this.fragCurrent) {
+          fetchdelay = this.fragCurrent.duration * nextLevel.maxBitrate / (1000 * fragLastKbps) + 1;
+        } else {
+          fetchdelay = 0;
+        }
+      } else {
+        fetchdelay = 0;
+      }
+      // this.log('fetchdelay:'+fetchdelay);
+      // find buffer range that will be reached once new fragment will be fetched
+      const bufferedFrag = this.getBufferedFrag(media.currentTime + fetchdelay);
+      if (bufferedFrag) {
+        // we can flush buffer range following this one without stalling playback
+        const nextBufferedFrag = this.followingBufferedFrag(bufferedFrag);
+        if (nextBufferedFrag) {
+          // if we are here, we can also cancel any loading/demuxing in progress, as they are useless
+          this.abortCurrentFrag();
+          // start flush position is in next buffered frag. Leave some padding for non-independent segments and smoother playback.
+          const maxStart = nextBufferedFrag.maxStartPTS ? nextBufferedFrag.maxStartPTS : nextBufferedFrag.start;
+          const fragDuration = nextBufferedFrag.duration;
+          const startPts = Math.max(bufferedFrag.end, maxStart + Math.min(Math.max(fragDuration - this.config.maxFragLookUpTolerance, fragDuration * (this.couldBacktrack ? 0.5 : 0.125)), fragDuration * (this.couldBacktrack ? 0.75 : 0.25)));
+          this.flushMainBuffer(startPts, Number.POSITIVE_INFINITY);
+        }
+      }
+    }
+  }
+  abortCurrentFrag() {
+    const fragCurrent = this.fragCurrent;
+    this.fragCurrent = null;
+    this.backtrackFragment = null;
+    if (fragCurrent) {
+      fragCurrent.abortRequests();
+      this.fragmentTracker.removeFragment(fragCurrent);
+    }
+    switch (this.state) {
+      case State.KEY_LOADING:
+      case State.FRAG_LOADING:
+      case State.FRAG_LOADING_WAITING_RETRY:
+      case State.PARSING:
+      case State.PARSED:
+        this.state = State.IDLE;
+        break;
+    }
+    this.nextLoadPosition = this.getLoadPosition();
+  }
+  flushMainBuffer(startOffset, endOffset) {
+    super.flushMainBuffer(startOffset, endOffset, this.altAudio === 2 ? 'video' : null);
+  }
+  onMediaAttached(event, data) {
+    super.onMediaAttached(event, data);
+    const media = data.media;
+    addEventListener(media, 'playing', this.onMediaPlaying);
+    addEventListener(media, 'seeked', this.onMediaSeeked);
+  }
+  onMediaDetaching(event, data) {
+    const {
+      media
+    } = this;
+    if (media) {
+      removeEventListener(media, 'playing', this.onMediaPlaying);
+      removeEventListener(media, 'seeked', this.onMediaSeeked);
+    }
+    this.videoBuffer = null;
+    this.fragPlaying = null;
+    super.onMediaDetaching(event, data);
+    const transferringMedia = !!data.transferMedia;
+    if (transferringMedia) {
+      return;
+    }
+    this._hasEnoughToStart = false;
+  }
+  onManifestLoading() {
+    super.onManifestLoading();
+    // reset buffer on manifest loading
+    this.log('Trigger BUFFER_RESET');
+    this.hls.trigger(Events.BUFFER_RESET, undefined);
+    this.couldBacktrack = false;
+    this.fragLastKbps = 0;
+    this.fragPlaying = this.backtrackFragment = null;
+    this.altAudio = 0;
+    this.audioOnly = false;
+  }
+  onManifestParsed(event, data) {
+    // detect if we have different kind of audio codecs used amongst playlists
+    let aac = false;
+    let heaac = false;
+    for (let i = 0; i < data.levels.length; i++) {
+      const codec = data.levels[i].audioCodec;
+      if (codec) {
+        aac = aac || codec.indexOf('mp4a.40.2') !== -1;
+        heaac = heaac || codec.indexOf('mp4a.40.5') !== -1;
+      }
+    }
+    this.audioCodecSwitch = aac && heaac && !changeTypeSupported();
+    if (this.audioCodecSwitch) {
+      this.log('Both AAC/HE-AAC audio found in levels; declaring level codec as HE-AAC');
+    }
+    this.levels = data.levels;
+    this.startFragRequested = false;
+  }
+  onLevelLoading(event, data) {
+    const {
+      levels
+    } = this;
+    if (!levels || this.state !== State.IDLE) {
+      return;
+    }
+    const level = data.levelInfo;
+    if (!level.details || level.details.live && (this.levelLastLoaded !== level || level.details.expired) || this.waitForCdnTuneIn(level.details)) {
+      this.state = State.WAITING_LEVEL;
+    }
+  }
+  onLevelLoaded(event, data) {
+    var _curLevel$details;
+    const {
+      levels,
+      startFragRequested
+    } = this;
+    const newLevelId = data.level;
+    const newDetails = data.details;
+    const duration = newDetails.totalduration;
+    if (!levels) {
+      this.warn(`Levels were reset while loading level ${newLevelId}`);
+      return;
+    }
+    this.log(`Level ${newLevelId} loaded [${newDetails.startSN},${newDetails.endSN}]${newDetails.lastPartSn ? `[part-${newDetails.lastPartSn}-${newDetails.lastPartIndex}]` : ''}, cc [${newDetails.startCC}, ${newDetails.endCC}] duration:${duration}`);
+    const curLevel = data.levelInfo;
+    const fragCurrent = this.fragCurrent;
+    if (fragCurrent && (this.state === State.FRAG_LOADING || this.state === State.FRAG_LOADING_WAITING_RETRY)) {
+      if (fragCurrent.level !== data.level && fragCurrent.loader) {
+        this.abortCurrentFrag();
+      }
+    }
+    let sliding = 0;
+    if (newDetails.live || (_curLevel$details = curLevel.details) != null && _curLevel$details.live) {
+      var _this$levelLastLoaded;
+      this.checkLiveUpdate(newDetails);
+      if (newDetails.deltaUpdateFailed) {
+        return;
+      }
+      sliding = this.alignPlaylists(newDetails, curLevel.details, (_this$levelLastLoaded = this.levelLastLoaded) == null ? void 0 : _this$levelLastLoaded.details);
+    }
+    // override level info
+    curLevel.details = newDetails;
+    this.levelLastLoaded = curLevel;
+    if (!startFragRequested) {
+      this.setStartPosition(newDetails, sliding);
+    }
+    this.hls.trigger(Events.LEVEL_UPDATED, {
+      details: newDetails,
+      level: newLevelId
+    });
+
+    // only switch back to IDLE state if we were waiting for level to start downloading a new fragment
+    if (this.state === State.WAITING_LEVEL) {
+      if (this.waitForCdnTuneIn(newDetails)) {
+        // Wait for Low-Latency CDN Tune-in
+        return;
+      }
+      this.state = State.IDLE;
+    }
+    if (startFragRequested && newDetails.live) {
+      this.synchronizeToLiveEdge(newDetails);
+    }
+
+    // trigger handler right now
+    this.tick();
+  }
+  synchronizeToLiveEdge(levelDetails) {
+    const {
+      config,
+      media
+    } = this;
+    if (!media) {
+      return;
+    }
+    const liveSyncPosition = this.hls.liveSyncPosition;
+    const currentTime = this.getLoadPosition();
+    const start = levelDetails.fragmentStart;
+    const end = levelDetails.edge;
+    const withinSlidingWindow = currentTime >= start - config.maxFragLookUpTolerance && currentTime <= end;
+    // Continue if we can seek forward to sync position or if current time is outside of sliding window
+    if (liveSyncPosition !== null && media.duration > liveSyncPosition && (currentTime < liveSyncPosition || !withinSlidingWindow)) {
+      // Continue if buffer is starving or if current time is behind max latency
+      const maxLatency = config.liveMaxLatencyDuration !== undefined ? config.liveMaxLatencyDuration : config.liveMaxLatencyDurationCount * levelDetails.targetduration;
+      if (!withinSlidingWindow && media.readyState < 4 || currentTime < end - maxLatency) {
+        if (!this._hasEnoughToStart) {
+          this.nextLoadPosition = liveSyncPosition;
+        }
+        // Only seek if ready and there is not a significant forward buffer available for playback
+        if (media.readyState) {
+          this.warn(`Playback: ${currentTime.toFixed(3)} is located too far from the end of live sliding playlist: ${end}, reset currentTime to : ${liveSyncPosition.toFixed(3)}`);
+          if (this.config.liveSyncMode === 'buffered') {
+            var _bufferInfo$buffered;
+            const bufferInfo = BufferHelper.bufferInfo(media, liveSyncPosition, 0);
+            if (!((_bufferInfo$buffered = bufferInfo.buffered) != null && _bufferInfo$buffered.length)) {
+              media.currentTime = liveSyncPosition;
+              return;
+            }
+            const isLiveSyncInBuffer = bufferInfo.start <= currentTime;
+            if (isLiveSyncInBuffer) {
+              media.currentTime = liveSyncPosition;
+              return;
+            }
+            const {
+              nextStart
+            } = BufferHelper.bufferedInfo(bufferInfo.buffered, currentTime, 0);
+            if (nextStart) {
+              media.currentTime = nextStart;
+            }
+          } else {
+            media.currentTime = liveSyncPosition;
+          }
+        }
+      }
+    }
+  }
+  _handleFragmentLoadProgress(data) {
+    var _frag$initSegment;
+    const frag = data.frag;
+    const {
+      part,
+      payload
+    } = data;
+    const {
+      levels
+    } = this;
+    if (!levels) {
+      this.warn(`Levels were reset while fragment load was in progress. Fragment ${frag.sn} of level ${frag.level} will not be buffered`);
+      return;
+    }
+    const currentLevel = levels[frag.level];
+    if (!currentLevel) {
+      this.warn(`Level ${frag.level} not found on progress`);
+      return;
+    }
+    const details = currentLevel.details;
+    if (!details) {
+      this.warn(`Dropping fragment ${frag.sn} of level ${frag.level} after level details were reset`);
+      this.fragmentTracker.removeFragment(frag);
+      return;
+    }
+    const videoCodec = currentLevel.videoCodec;
+
+    // time Offset is accurate if level PTS is known, or if playlist is not sliding (not live)
+    const accurateTimeOffset = details.PTSKnown || !details.live;
+    const initSegmentData = (_frag$initSegment = frag.initSegment) == null ? void 0 : _frag$initSegment.data;
+    const audioCodec = this._getAudioCodec(currentLevel);
+
+    // transmux the MPEG-TS data to ISO-BMFF segments
+    // this.log(`Transmuxing ${frag.sn} of [${details.startSN} ,${details.endSN}],level ${frag.level}, cc ${frag.cc}`);
+    const transmuxer = this.transmuxer = this.transmuxer || new TransmuxerInterface(this.hls, PlaylistLevelType.MAIN, this._handleTransmuxComplete.bind(this), this._handleTransmuxerFlush.bind(this));
+    const partIndex = part ? part.index : -1;
+    const partial = partIndex !== -1;
+    const chunkMeta = new ChunkMetadata(frag.level, frag.sn, frag.stats.chunkCount, payload.byteLength, partIndex, partial);
+    const initPTS = this.initPTS[frag.cc];
+    transmuxer.push(payload, initSegmentData, audioCodec, videoCodec, frag, part, details.totalduration, accurateTimeOffset, chunkMeta, initPTS);
+  }
+  onAudioTrackSwitching(event, data) {
+    const hls = this.hls;
+    // if any URL found on new audio track, it is an alternate audio track
+    const fromAltAudio = this.altAudio !== 0;
+    const altAudio = useAlternateAudio(data.url, hls);
+    // if we switch on main audio, ensure that main fragment scheduling is synced with media.buffered
+    // don't do anything if we switch to alt audio: audio stream controller is handling it.
+    // we will just have to change buffer scheduling on audioTrackSwitched
+    if (!altAudio) {
+      if (this.mediaBuffer !== this.media) {
+        this.log('Switching on main audio, use media.buffered to schedule main fragment loading');
+        this.mediaBuffer = this.media;
+        const fragCurrent = this.fragCurrent;
+        // we need to refill audio buffer from main: cancel any frag loading to speed up audio switch
+        if (fragCurrent) {
+          this.log('Switching to main audio track, cancel main fragment load');
+          fragCurrent.abortRequests();
+          this.fragmentTracker.removeFragment(fragCurrent);
+        }
+        // destroy transmuxer to force init segment generation (following audio switch)
+        this.resetTransmuxer();
+        // switch to IDLE state to load new fragment
+        this.resetLoadingState();
+      } else if (this.audioOnly) {
+        // Reset audio transmuxer so when switching back to main audio we're not still appending where we left off
+        this.resetTransmuxer();
+      }
+      // If switching from alt to main audio, flush all audio and trigger track switched
+      if (fromAltAudio) {
+        this.altAudio = 0;
+        this.fragmentTracker.removeAllFragments();
+        hls.once(Events.BUFFER_FLUSHED, () => {
+          if (!this.hls) {
+            return;
+          }
+          this.hls.trigger(Events.AUDIO_TRACK_SWITCHED, data);
+        });
+        hls.trigger(Events.BUFFER_FLUSHING, {
+          startOffset: 0,
+          endOffset: Number.POSITIVE_INFINITY,
+          type: null
+        });
+        return;
+      }
+      hls.trigger(Events.AUDIO_TRACK_SWITCHED, data);
+    } else {
+      this.altAudio = 1;
+    }
+  }
+  onAudioTrackSwitched(event, data) {
+    const altAudio = useAlternateAudio(data.url, this.hls);
+    if (altAudio) {
+      const videoBuffer = this.videoBuffer;
+      // if we switched on alternate audio, ensure that main fragment scheduling is synced with video sourcebuffer buffered
+      if (videoBuffer && this.mediaBuffer !== videoBuffer) {
+        this.log('Switching on alternate audio, use video.buffered to schedule main fragment loading');
+        this.mediaBuffer = videoBuffer;
+      }
+    }
+    this.altAudio = altAudio ? 2 : 0;
+    this.tick();
+  }
+  onBufferCreated(event, data) {
+    const tracks = data.tracks;
+    let mediaTrack;
+    let name;
+    let alternate = false;
+    for (const type in tracks) {
+      const track = tracks[type];
+      if (track.id === 'main') {
+        name = type;
+        mediaTrack = track;
+        // keep video source buffer reference
+        if (type === 'video') {
+          const videoTrack = tracks[type];
+          if (videoTrack) {
+            this.videoBuffer = videoTrack.buffer;
+          }
+        }
+      } else {
+        alternate = true;
+      }
+    }
+    if (alternate && mediaTrack) {
+      this.log(`Alternate track found, use ${name}.buffered to schedule main fragment loading`);
+      this.mediaBuffer = mediaTrack.buffer;
+    } else {
+      this.mediaBuffer = this.media;
+    }
+  }
+  onFragBuffered(event, data) {
+    const {
+      frag,
+      part
+    } = data;
+    const bufferedMainFragment = frag.type === PlaylistLevelType.MAIN;
+    if (bufferedMainFragment) {
+      if (this.fragContextChanged(frag)) {
+        // If a level switch was requested while a fragment was buffering, it will emit the FRAG_BUFFERED event upon completion
+        // Avoid setting state back to IDLE, since that will interfere with a level switch
+        this.warn(`Fragment ${frag.sn}${part ? ' p: ' + part.index : ''} of level ${frag.level} finished buffering, but was aborted. state: ${this.state}`);
+        if (this.state === State.PARSED) {
+          this.state = State.IDLE;
+        }
+        return;
+      }
+      const stats = part ? part.stats : frag.stats;
+      this.fragLastKbps = Math.round(8 * stats.total / (stats.buffering.end - stats.loading.first));
+      if (isMediaFragment(frag)) {
+        this.fragPrevious = frag;
+      }
+      this.fragBufferedComplete(frag, part);
+    }
+    const media = this.media;
+    if (!media) {
+      return;
+    }
+    if (!this._hasEnoughToStart && BufferHelper.getBuffered(media).length) {
+      this._hasEnoughToStart = true;
+      this.seekToStartPos();
+    }
+    if (bufferedMainFragment) {
+      this.tick();
+    }
+  }
+  get hasEnoughToStart() {
+    return this._hasEnoughToStart;
+  }
+  onError(event, data) {
+    var _data$context;
+    if (data.fatal) {
+      this.state = State.ERROR;
+      return;
+    }
+    switch (data.details) {
+      case ErrorDetails.FRAG_GAP:
+      case ErrorDetails.FRAG_PARSING_ERROR:
+      case ErrorDetails.FRAG_DECRYPT_ERROR:
+      case ErrorDetails.FRAG_LOAD_ERROR:
+      case ErrorDetails.FRAG_LOAD_TIMEOUT:
+      case ErrorDetails.KEY_LOAD_ERROR:
+      case ErrorDetails.KEY_LOAD_TIMEOUT:
+        this.onFragmentOrKeyLoadError(PlaylistLevelType.MAIN, data);
+        break;
+      case ErrorDetails.LEVEL_LOAD_ERROR:
+      case ErrorDetails.LEVEL_LOAD_TIMEOUT:
+      case ErrorDetails.LEVEL_PARSING_ERROR:
+        // in case of non fatal error while loading level, if level controller is not retrying to load level, switch back to IDLE
+        if (!data.levelRetry && this.state === State.WAITING_LEVEL && ((_data$context = data.context) == null ? void 0 : _data$context.type) === PlaylistContextType.LEVEL) {
+          this.state = State.IDLE;
+        }
+        break;
+      case ErrorDetails.BUFFER_ADD_CODEC_ERROR:
+      case ErrorDetails.BUFFER_APPEND_ERROR:
+        if (data.parent !== 'main') {
+          return;
+        }
+        if (this.reduceLengthAndFlushBuffer(data)) {
+          this.resetLoadingState();
+        }
+        break;
+      case ErrorDetails.BUFFER_FULL_ERROR:
+        if (data.parent !== 'main') {
+          return;
+        }
+        if (this.reduceLengthAndFlushBuffer(data)) {
+          const isAssetPlayer = !this.config.interstitialsController && this.config.assetPlayerId;
+          if (isAssetPlayer) {
+            // Use currentTime in buffer estimate to prevent loading more until playback advances
+            this._hasEnoughToStart = true;
+          } else {
+            this.flushMainBuffer(0, Number.POSITIVE_INFINITY);
+          }
+        }
+        break;
+      case ErrorDetails.INTERNAL_EXCEPTION:
+        this.recoverWorkerError(data);
+        break;
+    }
+  }
+  onFragLoadEmergencyAborted() {
+    this.state = State.IDLE;
+    // if loadedmetadata is not set, it means that we are emergency switch down on first frag
+    // in that case, reset startFragRequested flag
+    if (!this._hasEnoughToStart) {
+      this.startFragRequested = false;
+      this.nextLoadPosition = this.lastCurrentTime;
+    }
+    this.tickImmediate();
+  }
+  onBufferFlushed(event, {
+    type
+  }) {
+    if (type !== ElementaryStreamTypes.AUDIO || !this.altAudio) {
+      const mediaBuffer = (type === ElementaryStreamTypes.VIDEO ? this.videoBuffer : this.mediaBuffer) || this.media;
+      if (mediaBuffer) {
+        this.afterBufferFlushed(mediaBuffer, type, PlaylistLevelType.MAIN);
+        this.tick();
+      }
+    }
+  }
+  onLevelsUpdated(event, data) {
+    if (this.level > -1 && this.fragCurrent) {
+      this.level = this.fragCurrent.level;
+      if (this.level === -1) {
+        this.resetWhenMissingContext(this.fragCurrent);
+      }
+    }
+    this.levels = data.levels;
+  }
+  swapAudioCodec() {
+    this.audioCodecSwap = !this.audioCodecSwap;
+  }
+
+  /**
+   * Seeks to the set startPosition if not equal to the mediaElement's current time.
+   */
+  seekToStartPos() {
+    const {
+      media
+    } = this;
+    if (!media) {
+      return;
+    }
+    const currentTime = media.currentTime;
+    let startPosition = this.startPosition;
+    // only adjust currentTime if different from startPosition or if startPosition not buffered
+    // at that stage, there should be only one buffered range, as we reach that code after first fragment has been buffered
+    if (startPosition >= 0 && currentTime < startPosition) {
+      if (media.seeking) {
+        this.log(`could not seek to ${startPosition}, already seeking at ${currentTime}`);
+        return;
+      }
+
+      // Offset start position by timeline offset
+      const timelineOffset = this.timelineOffset;
+      if (timelineOffset && startPosition) {
+        startPosition += timelineOffset;
+      }
+      const details = this.getLevelDetails();
+      const buffered = BufferHelper.getBuffered(media);
+      const bufferStart = buffered.length ? buffered.start(0) : 0;
+      const delta = bufferStart - startPosition;
+      const skipTolerance = Math.max(this.config.maxBufferHole, this.config.maxFragLookUpTolerance);
+      if (this.config.startOnSegmentBoundary || delta > 0 && (delta < skipTolerance || this.loadingParts && delta < 2 * ((details == null ? void 0 : details.partTarget) || 0))) {
+        this.log(`adjusting start position by ${delta} to match buffer start`);
+        startPosition += delta;
+        this.startPosition = startPosition;
+      }
+      if (currentTime < startPosition) {
+        this.log(`seek to target start position ${startPosition} from current time ${currentTime} buffer start ${bufferStart}`);
+        media.currentTime = startPosition;
+      }
+    }
+  }
+  _getAudioCodec(currentLevel) {
+    let audioCodec = this.config.defaultAudioCodec || currentLevel.audioCodec;
+    if (this.audioCodecSwap && audioCodec) {
+      this.log('Swapping audio codec');
+      if (audioCodec.indexOf('mp4a.40.5') !== -1) {
+        audioCodec = 'mp4a.40.2';
+      } else {
+        audioCodec = 'mp4a.40.5';
+      }
+    }
+    return audioCodec;
+  }
+  _loadBitrateTestFrag(fragment, level) {
+    fragment.bitrateTest = true;
+    this._doFragLoad(fragment, level).then(data => {
+      const {
+        hls
+      } = this;
+      const frag = data == null ? void 0 : data.frag;
+      if (!frag || this.fragContextChanged(frag)) {
+        return;
+      }
+      level.fragmentError = 0;
+      this.state = State.IDLE;
+      this.startFragRequested = false;
+      this.bitrateTest = false;
+      const stats = frag.stats;
+      // Bitrate tests fragments are neither parsed nor buffered
+      stats.parsing.start = stats.parsing.end = stats.buffering.start = stats.buffering.end = self.performance.now();
+      hls.trigger(Events.FRAG_LOADED, data);
+      frag.bitrateTest = false;
+    }).catch(reason => {
+      if (this.state === State.STOPPED || this.state === State.ERROR) {
+        return;
+      }
+      this.warn(reason);
+      this.resetFragmentLoading(fragment);
+    });
+  }
+  _handleTransmuxComplete(transmuxResult) {
+    const id = this.playlistType;
+    const {
+      hls
+    } = this;
+    const {
+      remuxResult,
+      chunkMeta
+    } = transmuxResult;
+    const context = this.getCurrentContext(chunkMeta);
+    if (!context) {
+      this.resetWhenMissingContext(chunkMeta);
+      return;
+    }
+    const {
+      frag,
+      part,
+      level
+    } = context;
+    const {
+      video,
+      text,
+      id3,
+      initSegment
+    } = remuxResult;
+    const {
+      details
+    } = level;
+    // The audio-stream-controller handles audio buffering if Hls.js is playing an alternate audio track
+    const audio = this.altAudio ? undefined : remuxResult.audio;
+
+    // Check if the current fragment has been aborted. We check this by first seeing if we're still playing the current level.
+    // If we are, subsequently check if the currently loading fragment (fragCurrent) has changed.
+    if (this.fragContextChanged(frag)) {
+      this.fragmentTracker.removeFragment(frag);
+      return;
+    }
+    this.state = State.PARSING;
+    if (initSegment) {
+      const tracks = initSegment.tracks;
+      if (tracks) {
+        const mapFragment = frag.initSegment || frag;
+        if (this.unhandledEncryptionError(initSegment, frag)) {
+          return;
+        }
+        this._bufferInitSegment(level, tracks, mapFragment, chunkMeta);
+        hls.trigger(Events.FRAG_PARSING_INIT_SEGMENT, {
+          frag: mapFragment,
+          id,
+          tracks
+        });
+      }
+      const baseTime = initSegment.initPTS;
+      const timescale = initSegment.timescale;
+      const initPTS = this.initPTS[frag.cc];
+      if (isFiniteNumber(baseTime) && (!initPTS || initPTS.baseTime !== baseTime || initPTS.timescale !== timescale)) {
+        const trackId = initSegment.trackId;
+        this.initPTS[frag.cc] = {
+          baseTime,
+          timescale,
+          trackId
+        };
+        hls.trigger(Events.INIT_PTS_FOUND, {
+          frag,
+          id,
+          initPTS: baseTime,
+          timescale,
+          trackId
+        });
+      }
+    }
+
+    // Avoid buffering if backtracking this fragment
+    if (video && details) {
+      if (audio && video.type === 'audiovideo') {
+        this.logMuxedErr(frag);
+      }
+      const prevFrag = details.fragments[frag.sn - 1 - details.startSN];
+      const isFirstFragment = frag.sn === details.startSN;
+      const isFirstInDiscontinuity = !prevFrag || frag.cc > prevFrag.cc;
+      if (remuxResult.independent !== false) {
+        const {
+          startPTS,
+          endPTS,
+          startDTS,
+          endDTS
+        } = video;
+        if (part) {
+          part.elementaryStreams[video.type] = {
+            startPTS,
+            endPTS,
+            startDTS,
+            endDTS
+          };
+        } else {
+          if (video.firstKeyFrame && video.independent && chunkMeta.id === 1 && !isFirstInDiscontinuity) {
+            this.couldBacktrack = true;
+          }
+          if (video.dropped && video.independent) {
+            // Backtrack if dropped frames create a gap after currentTime
+
+            const bufferInfo = this.getMainFwdBufferInfo();
+            const targetBufferTime = (bufferInfo ? bufferInfo.end : this.getLoadPosition()) + this.config.maxBufferHole;
+            const startTime = video.firstKeyFramePTS ? video.firstKeyFramePTS : startPTS;
+            if (!isFirstFragment && targetBufferTime < startTime - this.config.maxBufferHole && !isFirstInDiscontinuity) {
+              this.backtrack(frag);
+              return;
+            } else if (isFirstInDiscontinuity) {
+              // Mark segment with a gap to avoid loop loading
+              frag.gap = true;
+            }
+            // Set video stream start to fragment start so that truncated samples do not distort the timeline, and mark it partial
+            frag.setElementaryStreamInfo(video.type, frag.start, endPTS, frag.start, endDTS, true);
+          } else if (isFirstFragment && startPTS - (details.appliedTimelineOffset || 0) > MAX_START_GAP_JUMP) {
+            // Mark segment with a gap to skip large start gap
+            frag.gap = true;
+          }
+        }
+        frag.setElementaryStreamInfo(video.type, startPTS, endPTS, startDTS, endDTS);
+        if (this.backtrackFragment) {
+          this.backtrackFragment = frag;
+        }
+        this.bufferFragmentData(video, frag, part, chunkMeta, isFirstFragment || isFirstInDiscontinuity);
+      } else if (isFirstFragment || isFirstInDiscontinuity) {
+        // Mark segment with a gap to avoid loop loading
+        frag.gap = true;
+      } else {
+        this.backtrack(frag);
+        return;
+      }
+    }
+    if (audio) {
+      const {
+        startPTS,
+        endPTS,
+        startDTS,
+        endDTS
+      } = audio;
+      if (part) {
+        part.elementaryStreams[ElementaryStreamTypes.AUDIO] = {
+          startPTS,
+          endPTS,
+          startDTS,
+          endDTS
+        };
+      }
+      frag.setElementaryStreamInfo(ElementaryStreamTypes.AUDIO, startPTS, endPTS, startDTS, endDTS);
+      this.bufferFragmentData(audio, frag, part, chunkMeta);
+    }
+    if (details && id3 != null && id3.samples.length) {
+      const emittedID3 = {
+        id,
+        frag,
+        details,
+        samples: id3.samples
+      };
+      hls.trigger(Events.FRAG_PARSING_METADATA, emittedID3);
+    }
+    if (details && text) {
+      const emittedText = {
+        id,
+        frag,
+        details,
+        samples: text.samples
+      };
+      hls.trigger(Events.FRAG_PARSING_USERDATA, emittedText);
+    }
+  }
+  logMuxedErr(frag) {
+    this.warn(`${isMediaFragment(frag) ? 'Media' : 'Init'} segment with muxed audiovideo where only video expected: ${frag.url}`);
+  }
+  _bufferInitSegment(currentLevel, tracks, frag, chunkMeta) {
+    if (this.state !== State.PARSING) {
+      return;
+    }
+    this.audioOnly = !!tracks.audio && !tracks.video;
+
+    // if audio track is expected to come from audio stream controller, discard any coming from main
+    if (this.altAudio && !this.audioOnly) {
+      delete tracks.audio;
+      if (tracks.audiovideo) {
+        this.logMuxedErr(frag);
+      }
+    }
+    // include levelCodec in audio and video tracks
+    const {
+      audio,
+      video,
+      audiovideo
+    } = tracks;
+    if (audio) {
+      const levelCodec = currentLevel.audioCodec;
+      let audioCodec = pickMostCompleteCodecName(audio.codec, levelCodec);
+      // Add level and profile to make up for remuxer not being able to parse full codec
+      // (logger warning "Unhandled audio codec...")
+      if (audioCodec === 'mp4a') {
+        audioCodec = 'mp4a.40.5';
+      }
+      // Handle `audioCodecSwitch`
+      const ua = navigator.userAgent.toLowerCase();
+      if (this.audioCodecSwitch) {
+        if (audioCodec) {
+          if (audioCodec.indexOf('mp4a.40.5') !== -1) {
+            audioCodec = 'mp4a.40.2';
+          } else {
+            audioCodec = 'mp4a.40.5';
+          }
+        }
+        // In the case that AAC and HE-AAC audio codecs are signalled in manifest,
+        // force HE-AAC, as it seems that most browsers prefers it.
+        // don't force HE-AAC if mono stream, or in Firefox
+        const audioMetadata = audio.metadata;
+        if (audioMetadata && 'channelCount' in audioMetadata && (audioMetadata.channelCount || 1) !== 1 && ua.indexOf('firefox') === -1) {
+          audioCodec = 'mp4a.40.5';
+        }
+      }
+      // HE-AAC is broken on Android, always signal audio codec as AAC even if variant manifest states otherwise
+      if (audioCodec && audioCodec.indexOf('mp4a.40.5') !== -1 && ua.indexOf('android') !== -1 && audio.container !== 'audio/mpeg') {
+        // Exclude mpeg audio
+        audioCodec = 'mp4a.40.2';
+        this.log(`Android: force audio codec to ${audioCodec}`);
+      }
+      if (levelCodec && levelCodec !== audioCodec) {
+        this.log(`Swapping manifest audio codec "${levelCodec}" for "${audioCodec}"`);
+      }
+      audio.levelCodec = audioCodec;
+      audio.id = PlaylistLevelType.MAIN;
+      this.log(`Init audio buffer, container:${audio.container}, codecs[selected/level/parsed]=[${audioCodec || ''}/${levelCodec || ''}/${audio.codec}]`);
+      delete tracks.audiovideo;
+    }
+    if (video) {
+      video.levelCodec = currentLevel.videoCodec;
+      video.id = PlaylistLevelType.MAIN;
+      const parsedVideoCodec = video.codec;
+      if ((parsedVideoCodec == null ? void 0 : parsedVideoCodec.length) === 4) {
+        // Make up for passthrough-remuxer not being able to parse full codec
+        // (logger warning "Unhandled video codec...")
+        switch (parsedVideoCodec) {
+          case 'hvc1':
+          case 'hev1':
+            video.codec = 'hvc1.1.6.L120.90';
+            break;
+          case 'av01':
+            video.codec = 'av01.0.04M.08';
+            break;
+          case 'avc1':
+            video.codec = 'avc1.42e01e';
+            break;
+        }
+      }
+      this.log(`Init video buffer, container:${video.container}, codecs[level/parsed]=[${currentLevel.videoCodec || ''}/${parsedVideoCodec}]${video.codec !== parsedVideoCodec ? ' parsed-corrected=' + video.codec : ''}${video.supplemental ? ' supplemental=' + video.supplemental : ''}`);
+      delete tracks.audiovideo;
+    }
+    if (audiovideo) {
+      this.log(`Init audiovideo buffer, container:${audiovideo.container}, codecs[level/parsed]=[${currentLevel.codecs}/${audiovideo.codec}]`);
+      delete tracks.video;
+      delete tracks.audio;
+    }
+    const trackTypes = Object.keys(tracks);
+    if (trackTypes.length) {
+      this.hls.trigger(Events.BUFFER_CODECS, tracks);
+      if (!this.hls) {
+        // Exit after fatal tracks error
+        return;
+      }
+      // loop through tracks that are going to be provided to bufferController
+      trackTypes.forEach(trackName => {
+        const track = tracks[trackName];
+        const initSegment = track.initSegment;
+        if (initSegment != null && initSegment.byteLength) {
+          this.hls.trigger(Events.BUFFER_APPENDING, {
+            type: trackName,
+            data: initSegment,
+            frag,
+            part: null,
+            chunkMeta,
+            parent: frag.type
+          });
+        }
+      });
+    }
+    // trigger handler right now
+    this.tickImmediate();
+  }
+  getMainFwdBufferInfo() {
+    // Observe video SourceBuffer (this.mediaBuffer) only when alt-audio is used, otherwise observe combined media buffer
+    const bufferOutput = this.mediaBuffer && this.altAudio === 2 ? this.mediaBuffer : this.media;
+    return this.getFwdBufferInfo(bufferOutput, PlaylistLevelType.MAIN);
+  }
+  get maxBufferLength() {
+    const {
+      levels,
+      level
+    } = this;
+    const levelInfo = levels == null ? void 0 : levels[level];
+    if (!levelInfo) {
+      return this.config.maxBufferLength;
+    }
+    return this.getMaxBufferLength(levelInfo.maxBitrate);
+  }
+  backtrack(frag) {
+    this.couldBacktrack = true;
+    // Causes findFragments to backtrack through fragments to find the keyframe
+    this.backtrackFragment = frag;
+    this.resetTransmuxer();
+    this.flushBufferGap(frag);
+    this.fragmentTracker.removeFragment(frag);
+    this.fragPrevious = null;
+    this.nextLoadPosition = frag.start;
+    this.state = State.IDLE;
+  }
+  checkFragmentChanged() {
+    const video = this.media;
+    let fragPlayingCurrent = null;
+    if (video && video.readyState > 1 && video.seeking === false) {
+      const currentTime = video.currentTime;
+      /* if video element is in seeked state, currentTime can only increase.
+        (assuming that playback rate is positive ...)
+        As sometimes currentTime jumps back to zero after a
+        media decode error, check this, to avoid seeking back to
+        wrong position after a media decode error
+      */
+
+      if (BufferHelper.isBuffered(video, currentTime)) {
+        fragPlayingCurrent = this.getAppendedFrag(currentTime);
+      } else if (BufferHelper.isBuffered(video, currentTime + 0.1)) {
+        /* ensure that FRAG_CHANGED event is triggered at startup,
+          when first video frame is displayed and playback is paused.
+          add a tolerance of 100ms, in case current position is not buffered,
+          check if current pos+100ms is buffered and use that buffer range
+          for FRAG_CHANGED event reporting */
+        fragPlayingCurrent = this.getAppendedFrag(currentTime + 0.1);
+      }
+      if (fragPlayingCurrent) {
+        this.backtrackFragment = null;
+        const fragPlaying = this.fragPlaying;
+        const fragCurrentLevel = fragPlayingCurrent.level;
+        if (!fragPlaying || fragPlayingCurrent.sn !== fragPlaying.sn || fragPlaying.level !== fragCurrentLevel) {
+          this.fragPlaying = fragPlayingCurrent;
+          this.hls.trigger(Events.FRAG_CHANGED, {
+            frag: fragPlayingCurrent
+          });
+          if (!fragPlaying || fragPlaying.level !== fragCurrentLevel) {
+            this.hls.trigger(Events.LEVEL_SWITCHED, {
+              level: fragCurrentLevel
+            });
+          }
+        }
+      }
+    }
+  }
+  get nextLevel() {
+    const frag = this.nextBufferedFrag;
+    if (frag) {
+      return frag.level;
+    }
+    return -1;
+  }
+  get currentFrag() {
+    var _this$media2;
+    if (this.fragPlaying) {
+      return this.fragPlaying;
+    }
+    const currentTime = ((_this$media2 = this.media) == null ? void 0 : _this$media2.currentTime) || this.lastCurrentTime;
+    if (isFiniteNumber(currentTime)) {
+      return this.getAppendedFrag(currentTime);
+    }
+    return null;
+  }
+  get currentProgramDateTime() {
+    var _this$media3;
+    const currentTime = ((_this$media3 = this.media) == null ? void 0 : _this$media3.currentTime) || this.lastCurrentTime;
+    if (isFiniteNumber(currentTime)) {
+      const details = this.getLevelDetails();
+      const frag = this.currentFrag || (details ? findFragmentByPTS(null, details.fragments, currentTime) : null);
+      if (frag) {
+        const programDateTime = frag.programDateTime;
+        if (programDateTime !== null) {
+          const epocMs = programDateTime + (currentTime - frag.start) * 1000;
+          return new Date(epocMs);
+        }
+      }
+    }
+    return null;
+  }
+  get currentLevel() {
+    const frag = this.currentFrag;
+    if (frag) {
+      return frag.level;
+    }
+    return -1;
+  }
+  get nextBufferedFrag() {
+    const frag = this.currentFrag;
+    if (frag) {
+      return this.followingBufferedFrag(frag);
+    }
+    return null;
+  }
+  get forceStartLoad() {
+    return this._forceStartLoad;
+  }
+}
+
+class KeyLoader extends Logger {
+  constructor(config, logger) {
+    super('key-loader', logger);
+    this.config = void 0;
+    this.keyIdToKeyInfo = {};
+    this.emeController = null;
+    this.config = config;
+  }
+  abort(type) {
+    for (const id in this.keyIdToKeyInfo) {
+      const loader = this.keyIdToKeyInfo[id].loader;
+      if (loader) {
+        var _loader$context;
+        if (type && type !== ((_loader$context = loader.context) == null ? void 0 : _loader$context.frag.type)) {
+          return;
+        }
+        loader.abort();
+      }
+    }
+  }
+  detach() {
+    for (const id in this.keyIdToKeyInfo) {
+      const keyInfo = this.keyIdToKeyInfo[id];
+      // Remove cached EME keys on detach
+      if (keyInfo.mediaKeySessionContext || keyInfo.decryptdata.isCommonEncryption) {
+        delete this.keyIdToKeyInfo[id];
+      }
+    }
+  }
+  destroy() {
+    this.detach();
+    for (const id in this.keyIdToKeyInfo) {
+      const loader = this.keyIdToKeyInfo[id].loader;
+      if (loader) {
+        loader.destroy();
+      }
+    }
+    this.keyIdToKeyInfo = {};
+  }
+  createKeyLoadError(frag, details = ErrorDetails.KEY_LOAD_ERROR, error, networkDetails, response) {
+    return new LoadError({
+      type: ErrorTypes.NETWORK_ERROR,
+      details,
+      fatal: false,
+      frag,
+      response,
+      error,
+      networkDetails
+    });
+  }
+  loadClear(loadingFrag, encryptedFragments, startFragRequested) {
+    if (this.emeController && this.config.emeEnabled && !this.emeController.getSelectedKeySystemFormats().length) {
+      // Access key-system with nearest key on start (loading frag is unencrypted)
+      if (encryptedFragments.length) {
+        for (let i = 0, l = encryptedFragments.length; i < l; i++) {
+          const frag = encryptedFragments[i];
+          // Loading at or before segment with EXT-X-KEY, or first frag loading and last EXT-X-KEY
+          if (loadingFrag.cc <= frag.cc && (!isMediaFragment(loadingFrag) || !isMediaFragment(frag) || loadingFrag.sn < frag.sn) || !startFragRequested && i == l - 1) {
+            return this.emeController.selectKeySystemFormat(frag).then(keySystemFormat => {
+              if (!this.emeController) {
+                return;
+              }
+              frag.setKeyFormat(keySystemFormat);
+              const keySystem = keySystemFormatToKeySystemDomain(keySystemFormat);
+              if (keySystem) {
+                return this.emeController.getKeySystemAccess([keySystem]);
+              }
+            });
+          }
+        }
+      }
+      if (this.config.requireKeySystemAccessOnStart) {
+        const keySystemsInConfig = getKeySystemsForConfig(this.config);
+        if (keySystemsInConfig.length) {
+          return this.emeController.getKeySystemAccess(keySystemsInConfig);
+        }
+      }
+    }
+    return null;
+  }
+  load(frag) {
+    if (!frag.decryptdata && frag.encrypted && this.emeController && this.config.emeEnabled) {
+      // Multiple keys, but none selected, resolve in eme-controller
+      return this.emeController.selectKeySystemFormat(frag).then(keySystemFormat => {
+        return this.loadInternal(frag, keySystemFormat);
+      });
+    }
+    return this.loadInternal(frag);
+  }
+  loadInternal(frag, keySystemFormat) {
+    var _keyInfo, _keyInfo2;
+    if (keySystemFormat) {
+      frag.setKeyFormat(keySystemFormat);
+    }
+    const decryptdata = frag.decryptdata;
+    if (!decryptdata) {
+      const error = new Error(keySystemFormat ? `Expected frag.decryptdata to be defined after setting format ${keySystemFormat}` : `Missing decryption data on fragment in onKeyLoading (emeEnabled with controller: ${this.emeController && this.config.emeEnabled})`);
+      return Promise.reject(this.createKeyLoadError(frag, ErrorDetails.KEY_LOAD_ERROR, error));
+    }
+    const uri = decryptdata.uri;
+    if (!uri) {
+      return Promise.reject(this.createKeyLoadError(frag, ErrorDetails.KEY_LOAD_ERROR, new Error(`Invalid key URI: "${uri}"`)));
+    }
+    const id = getKeyId(decryptdata);
+    let keyInfo = this.keyIdToKeyInfo[id];
+    if ((_keyInfo = keyInfo) != null && _keyInfo.decryptdata.key) {
+      decryptdata.key = keyInfo.decryptdata.key;
+      return Promise.resolve({
+        frag,
+        keyInfo
+      });
+    }
+    // Return key load promise once it has a mediakey session with an usable key status
+    if (this.emeController && (_keyInfo2 = keyInfo) != null && _keyInfo2.keyLoadPromise) {
+      const keyStatus = this.emeController.getKeyStatus(keyInfo.decryptdata);
+      switch (keyStatus) {
+        case 'usable':
+        case 'usable-in-future':
+          return keyInfo.keyLoadPromise.then(keyLoadedData => {
+            // Return the correct fragment with updated decryptdata key and loaded keyInfo
+            const {
+              keyInfo
+            } = keyLoadedData;
+            decryptdata.key = keyInfo.decryptdata.key;
+            return {
+              frag,
+              keyInfo
+            };
+          });
+      }
+      // If we have a key session and status and it is not pending or usable, continue
+      // This will go back to the eme-controller for expired keys to get a new keyLoadPromise
+    }
+
+    // Load the key or return the loading promise
+    this.log(`${this.keyIdToKeyInfo[id] ? 'Rel' : 'L'}oading${decryptdata.keyId ? ' keyId: ' + arrayToHex(decryptdata.keyId) : ''} URI: ${decryptdata.uri} from ${frag.type} ${frag.level}`);
+    keyInfo = this.keyIdToKeyInfo[id] = {
+      decryptdata,
+      keyLoadPromise: null,
+      loader: null,
+      mediaKeySessionContext: null
+    };
+    switch (decryptdata.method) {
+      case 'SAMPLE-AES':
+      case 'SAMPLE-AES-CENC':
+      case 'SAMPLE-AES-CTR':
+        if (decryptdata.keyFormat === 'identity') {
+          // loadKeyHTTP handles http(s) and data URLs
+          return this.loadKeyHTTP(keyInfo, frag);
+        }
+        return this.loadKeyEME(keyInfo, frag);
+      case 'AES-128':
+      case 'AES-256':
+      case 'AES-256-CTR':
+        return this.loadKeyHTTP(keyInfo, frag);
+      default:
+        return Promise.reject(this.createKeyLoadError(frag, ErrorDetails.KEY_LOAD_ERROR, new Error(`Key supplied with unsupported METHOD: "${decryptdata.method}"`)));
+    }
+  }
+  loadKeyEME(keyInfo, frag) {
+    const keyLoadedData = {
+      frag,
+      keyInfo
+    };
+    if (this.emeController && this.config.emeEnabled) {
+      var _frag$initSegment;
+      if (!keyInfo.decryptdata.keyId && (_frag$initSegment = frag.initSegment) != null && _frag$initSegment.data) {
+        const keyIds = parseKeyIdsFromTenc(frag.initSegment.data);
+        if (keyIds.length) {
+          let keyId = keyIds[0];
+          if (keyId.some(b => b !== 0)) {
+            this.log(`Using keyId found in init segment ${arrayToHex(keyId)}`);
+            LevelKey.setKeyIdForUri(keyInfo.decryptdata.uri, keyId);
+          } else {
+            keyId = LevelKey.addKeyIdForUri(keyInfo.decryptdata.uri);
+            this.log(`Generating keyId to patch media ${arrayToHex(keyId)}`);
+          }
+          keyInfo.decryptdata.keyId = keyId;
+        }
+      }
+      if (!keyInfo.decryptdata.keyId && !isMediaFragment(frag)) {
+        // Resolve so that unencrypted init segment is loaded
+        // key id is extracted from tenc box when processing key for next segment above
+        return Promise.resolve(keyLoadedData);
+      }
+      const keySessionContextPromise = this.emeController.loadKey(keyLoadedData);
+      return (keyInfo.keyLoadPromise = keySessionContextPromise.then(keySessionContext => {
+        keyInfo.mediaKeySessionContext = keySessionContext;
+        return keyLoadedData;
+      })).catch(error => {
+        // Remove promise for license renewal or retry
+        keyInfo.keyLoadPromise = null;
+        if ('data' in error) {
+          error.data.frag = frag;
+        }
+        throw error;
+      });
+    }
+    return Promise.resolve(keyLoadedData);
+  }
+  loadKeyHTTP(keyInfo, frag) {
+    const config = this.config;
+    const Loader = config.loader;
+    const keyLoader = new Loader(config);
+    frag.keyLoader = keyInfo.loader = keyLoader;
+    return keyInfo.keyLoadPromise = new Promise((resolve, reject) => {
+      const loaderContext = {
+        keyInfo,
+        frag,
+        responseType: 'arraybuffer',
+        url: keyInfo.decryptdata.uri
+      };
+
+      // maxRetry is 0 so that instead of retrying the same key on the same variant multiple times,
+      // key-loader will trigger an error and rely on stream-controller to handle retry logic.
+      // this will also align retry logic with fragment-loader
+      const loadPolicy = config.keyLoadPolicy.default;
+      const loaderConfig = {
+        loadPolicy,
+        timeout: loadPolicy.maxLoadTimeMs,
+        maxRetry: 0,
+        retryDelay: 0,
+        maxRetryDelay: 0
+      };
+      const loaderCallbacks = {
+        onSuccess: (response, stats, context, networkDetails) => {
+          const {
+            frag,
+            keyInfo
+          } = context;
+          const id = getKeyId(keyInfo.decryptdata);
+          if (!frag.decryptdata || keyInfo !== this.keyIdToKeyInfo[id]) {
+            return reject(this.createKeyLoadError(frag, ErrorDetails.KEY_LOAD_ERROR, new Error('after key load, decryptdata unset or changed'), networkDetails));
+          }
+          keyInfo.decryptdata.key = frag.decryptdata.key = new Uint8Array(response.data);
+
+          // detach fragment key loader on load success
+          frag.keyLoader = null;
+          keyInfo.loader = null;
+          resolve({
+            frag,
+            keyInfo
+          });
+        },
+        onError: (response, context, networkDetails, stats) => {
+          this.resetLoader(context);
+          reject(this.createKeyLoadError(frag, ErrorDetails.KEY_LOAD_ERROR, new Error(`HTTP Error ${response.code} loading key ${response.text}`), networkDetails, _objectSpread2({
+            url: loaderContext.url,
+            data: undefined
+          }, response)));
+        },
+        onTimeout: (stats, context, networkDetails) => {
+          this.resetLoader(context);
+          reject(this.createKeyLoadError(frag, ErrorDetails.KEY_LOAD_TIMEOUT, new Error('key loading timed out'), networkDetails));
+        },
+        onAbort: (stats, context, networkDetails) => {
+          this.resetLoader(context);
+          reject(this.createKeyLoadError(frag, ErrorDetails.INTERNAL_ABORTED, new Error('key loading aborted'), networkDetails));
+        }
+      };
+      keyLoader.load(loaderContext, loaderConfig, loaderCallbacks);
+    });
+  }
+  resetLoader(context) {
+    const {
+      frag,
+      keyInfo,
+      url: uri
+    } = context;
+    const loader = keyInfo.loader;
+    if (frag.keyLoader === loader) {
+      frag.keyLoader = null;
+      keyInfo.loader = null;
+    }
+    const id = getKeyId(keyInfo.decryptdata) || uri;
+    delete this.keyIdToKeyInfo[id];
+    if (loader) {
+      loader.destroy();
+    }
+  }
+}
+function getKeyId(decryptdata) {
+  if (decryptdata.keyFormat !== KeySystemFormats.FAIRPLAY) {
+    const keyId = decryptdata.keyId;
+    if (keyId) {
+      return arrayToHex(keyId);
+    }
+  }
+  return decryptdata.uri;
+}
+
+function mapContextToLevelType(context) {
+  const {
+    type
+  } = context;
+  switch (type) {
+    case PlaylistContextType.AUDIO_TRACK:
+      return PlaylistLevelType.AUDIO;
+    case PlaylistContextType.SUBTITLE_TRACK:
+      return PlaylistLevelType.SUBTITLE;
+    default:
+      return PlaylistLevelType.MAIN;
+  }
+}
+function getResponseUrl(response, context) {
+  let url = response.url;
+  // responseURL not supported on some browsers (it is used to detect URL redirection)
+  // data-uri mode also not supported (but no need to detect redirection)
+  if (url === undefined || url.indexOf('data:') === 0) {
+    // fallback to initial URL
+    url = context.url;
+  }
+  return url;
+}
+class PlaylistLoader {
+  constructor(hls) {
+    this.hls = void 0;
+    this.loaders = Object.create(null);
+    this.variableList = null;
+    this.onManifestLoaded = this.checkAutostartLoad;
+    this.hls = hls;
+    this.registerListeners();
+  }
+  startLoad(startPosition) {}
+  stopLoad() {
+    this.destroyInternalLoaders();
+  }
+  registerListeners() {
+    const {
+      hls
+    } = this;
+    hls.on(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.on(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.on(Events.AUDIO_TRACK_LOADING, this.onAudioTrackLoading, this);
+    hls.on(Events.SUBTITLE_TRACK_LOADING, this.onSubtitleTrackLoading, this);
+    hls.on(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+  }
+  unregisterListeners() {
+    const {
+      hls
+    } = this;
+    hls.off(Events.MANIFEST_LOADING, this.onManifestLoading, this);
+    hls.off(Events.LEVEL_LOADING, this.onLevelLoading, this);
+    hls.off(Events.AUDIO_TRACK_LOADING, this.onAudioTrackLoading, this);
+    hls.off(Events.SUBTITLE_TRACK_LOADING, this.onSubtitleTrackLoading, this);
+    hls.off(Events.LEVELS_UPDATED, this.onLevelsUpdated, this);
+  }
+
+  /**
+   * Returns defaults or configured loader-type overloads (pLoader and loader config params)
+   */
+  createInternalLoader(context) {
+    const config = this.hls.config;
+    const PLoader = config.pLoader;
+    const Loader = config.loader;
+    const InternalLoader = PLoader || Loader;
+    const loader = new InternalLoader(config);
+    this.loaders[context.type] = loader;
+    return loader;
+  }
+  getInternalLoader(context) {
+    return this.loaders[context.type];
+  }
+  resetInternalLoader(contextType) {
+    if (this.loaders[contextType]) {
+      delete this.loaders[contextType];
+    }
+  }
+
+  /**
+   * Call `destroy` on all internal loader instances mapped (one per context type)
+   */
+  destroyInternalLoaders() {
+    for (const contextType in this.loaders) {
+      const loader = this.loaders[contextType];
+      if (loader) {
+        loader.destroy();
+      }
+      this.resetInternalLoader(contextType);
+    }
+  }
+  destroy() {
+    this.variableList = null;
+    this.unregisterListeners();
+    this.destroyInternalLoaders();
+  }
+  onManifestLoading(event, data) {
+    const {
+      url
+    } = data;
+    this.variableList = null;
+    this.load({
+      id: null,
+      level: 0,
+      responseType: 'text',
+      type: PlaylistContextType.MANIFEST,
+      url,
+      deliveryDirectives: null,
+      levelOrTrack: null
+    });
+  }
+  onLevelLoading(event, data) {
+    const {
+      id,
+      level,
+      pathwayId,
+      url,
+      deliveryDirectives,
+      levelInfo
+    } = data;
+    this.load({
+      id,
+      level,
+      pathwayId,
+      responseType: 'text',
+      type: PlaylistContextType.LEVEL,
+      url,
+      deliveryDirectives,
+      levelOrTrack: levelInfo
+    });
+  }
+  onAudioTrackLoading(event, data) {
+    const {
+      id,
+      groupId,
+      url,
+      deliveryDirectives,
+      track
+    } = data;
+    this.load({
+      id,
+      groupId,
+      level: null,
+      responseType: 'text',
+      type: PlaylistContextType.AUDIO_TRACK,
+      url,
+      deliveryDirectives,
+      levelOrTrack: track
+    });
+  }
+  onSubtitleTrackLoading(event, data) {
+    const {
+      id,
+      groupId,
+      url,
+      deliveryDirectives,
+      track
+    } = data;
+    this.load({
+      id,
+      groupId,
+      level: null,
+      responseType: 'text',
+      type: PlaylistContextType.SUBTITLE_TRACK,
+      url,
+      deliveryDirectives,
+      levelOrTrack: track
+    });
+  }
+  onLevelsUpdated(event, data) {
+    // abort and delete loader of removed levels
+    const loader = this.loaders[PlaylistContextType.LEVEL];
+    if (loader) {
+      const context = loader.context;
+      if (context && !data.levels.some(lvl => lvl === context.levelOrTrack)) {
+        loader.abort();
+        delete this.loaders[PlaylistContextType.LEVEL];
+      }
+    }
+  }
+  load(context) {
+    var _context$deliveryDire;
+    const config = this.hls.config;
+
+    // logger.debug(`[playlist-loader]: Loading playlist of type ${context.type}, level: ${context.level}, id: ${context.id}`);
+
+    // Check if a loader for this context already exists
+    let loader = this.getInternalLoader(context);
+    if (loader) {
+      const logger = this.hls.logger;
+      const loaderContext = loader.context;
+      if (loaderContext && loaderContext.levelOrTrack === context.levelOrTrack && (loaderContext.url === context.url || loaderContext.deliveryDirectives && !context.deliveryDirectives)) {
+        // same URL can't overlap, or wait for blocking request
+        if (loaderContext.url === context.url) {
+          logger.log(`[playlist-loader]: ignore ${context.url} ongoing request`);
+        } else {
+          logger.log(`[playlist-loader]: ignore ${context.url} in favor of ${loaderContext.url}`);
+        }
+        return;
+      }
+      logger.log(`[playlist-loader]: aborting previous loader for type: ${context.type}`);
+      loader.abort();
+    }
+
+    // apply different configs for retries depending on
+    // context (manifest, level, audio/subs playlist)
+    let loadPolicy;
+    if (context.type === PlaylistContextType.MANIFEST) {
+      loadPolicy = config.manifestLoadPolicy.default;
+    } else {
+      loadPolicy = _extends({}, config.playlistLoadPolicy.default, {
+        timeoutRetry: null,
+        errorRetry: null
+      });
+    }
+    loader = this.createInternalLoader(context);
+
+    // Override level/track timeout for LL-HLS requests
+    // (the default of 10000ms is counter productive to blocking playlist reload requests)
+    if (isFiniteNumber((_context$deliveryDire = context.deliveryDirectives) == null ? void 0 : _context$deliveryDire.part)) {
+      let levelDetails;
+      if (context.type === PlaylistContextType.LEVEL && context.level !== null) {
+        levelDetails = this.hls.levels[context.level].details;
+      } else if (context.type === PlaylistContextType.AUDIO_TRACK && context.id !== null) {
+        levelDetails = this.hls.audioTracks[context.id].details;
+      } else if (context.type === PlaylistContextType.SUBTITLE_TRACK && context.id !== null) {
+        levelDetails = this.hls.subtitleTracks[context.id].details;
+      }
+      if (levelDetails) {
+        const partTarget = levelDetails.partTarget;
+        const targetDuration = levelDetails.targetduration;
+        if (partTarget && targetDuration) {
+          const maxLowLatencyPlaylistRefresh = Math.max(partTarget * 3, targetDuration * 0.8) * 1000;
+          loadPolicy = _extends({}, loadPolicy, {
+            maxTimeToFirstByteMs: Math.min(maxLowLatencyPlaylistRefresh, loadPolicy.maxTimeToFirstByteMs),
+            maxLoadTimeMs: Math.min(maxLowLatencyPlaylistRefresh, loadPolicy.maxTimeToFirstByteMs)
+          });
+        }
+      }
+    }
+    const legacyRetryCompatibility = loadPolicy.errorRetry || loadPolicy.timeoutRetry || {};
+    const loaderConfig = {
+      loadPolicy,
+      timeout: loadPolicy.maxLoadTimeMs,
+      maxRetry: legacyRetryCompatibility.maxNumRetry || 0,
+      retryDelay: legacyRetryCompatibility.retryDelayMs || 0,
+      maxRetryDelay: legacyRetryCompatibility.maxRetryDelayMs || 0
+    };
+    const loaderCallbacks = {
+      onSuccess: (response, stats, context, networkDetails) => {
+        const loader = this.getInternalLoader(context);
+        this.resetInternalLoader(context.type);
+        const string = response.data;
+        stats.parsing.start = performance.now();
+        if (M3U8Parser.isMediaPlaylist(string) || context.type !== PlaylistContextType.MANIFEST) {
+          this.handleTrackOrLevelPlaylist(response, stats, context, networkDetails || null, loader);
+        } else {
+          this.handleMasterPlaylist(response, stats, context, networkDetails);
+        }
+      },
+      onError: (response, context, networkDetails, stats) => {
+        this.handleNetworkError(context, networkDetails, false, response, stats);
+      },
+      onTimeout: (stats, context, networkDetails) => {
+        this.handleNetworkError(context, networkDetails, true, undefined, stats);
+      }
+    };
+
+    // logger.debug(`[playlist-loader]: Calling internal loader delegate for URL: ${context.url}`);
+
+    loader.load(context, loaderConfig, loaderCallbacks);
+  }
+  checkAutostartLoad() {
+    if (!this.hls) {
+      return;
+    }
+    const {
+      config: {
+        autoStartLoad,
+        startPosition
+      },
+      forceStartLoad
+    } = this.hls;
+    if (autoStartLoad || forceStartLoad) {
+      this.hls.logger.log(`${autoStartLoad ? 'auto' : 'force'} startLoad with configured startPosition ${startPosition}`);
+      this.hls.startLoad(startPosition);
+    }
+  }
+  handleMasterPlaylist(response, stats, context, networkDetails) {
+    const hls = this.hls;
+    const string = response.data;
+    const url = getResponseUrl(response, context);
+    const parsedResult = M3U8Parser.parseMasterPlaylist(string, url);
+    if (parsedResult.playlistParsingError) {
+      stats.parsing.end = performance.now();
+      this.handleManifestParsingError(response, context, parsedResult.playlistParsingError, networkDetails, stats);
+      return;
+    }
+    const {
+      contentSteering,
+      levels,
+      sessionData,
+      sessionKeys,
+      startTimeOffset,
+      variableList
+    } = parsedResult;
+    this.variableList = variableList;
+
+    // Treat unknown codec as audio or video codec based on passing `isTypeSupported` check
+    // (allows for playback of any supported codec even if not indexed in utils/codecs)
+    levels.forEach(levelParsed => {
+      const {
+        unknownCodecs
+      } = levelParsed;
+      if (unknownCodecs) {
+        const {
+          preferManagedMediaSource
+        } = this.hls.config;
+        let {
+          audioCodec,
+          videoCodec
+        } = levelParsed;
+        for (let i = unknownCodecs.length; i--;) {
+          const unknownCodec = unknownCodecs[i];
+          if (areCodecsMediaSourceSupported(unknownCodec, 'audio', preferManagedMediaSource)) {
+            levelParsed.audioCodec = audioCodec = audioCodec ? `${audioCodec},${unknownCodec}` : unknownCodec;
+            sampleEntryCodesISO.audio[audioCodec.substring(0, 4)] = 2;
+            unknownCodecs.splice(i, 1);
+          } else if (areCodecsMediaSourceSupported(unknownCodec, 'video', preferManagedMediaSource)) {
+            levelParsed.videoCodec = videoCodec = videoCodec ? `${videoCodec},${unknownCodec}` : unknownCodec;
+            sampleEntryCodesISO.video[videoCodec.substring(0, 4)] = 2;
+            unknownCodecs.splice(i, 1);
+          }
+        }
+      }
+    });
+    const {
+      AUDIO: audioTracks = [],
+      SUBTITLES: subtitles,
+      'CLOSED-CAPTIONS': captions
+    } = M3U8Parser.parseMasterPlaylistMedia(string, url, parsedResult);
+    if (audioTracks.length) {
+      // check if we have found an audio track embedded in main playlist (audio track without URI attribute)
+      const embeddedAudioFound = audioTracks.some(audioTrack => !audioTrack.url);
+
+      // if no embedded audio track defined, but audio codec signaled in quality level,
+      // we need to signal this main audio track this could happen with playlists with
+      // alt audio rendition in which quality levels (main)
+      // contains both audio+video. but with mixed audio track not signaled
+      if (!embeddedAudioFound && levels[0].audioCodec && !levels[0].attrs.AUDIO) {
+        this.hls.logger.log('[playlist-loader]: audio codec signaled in quality level, but no embedded audio track signaled, create one');
+        audioTracks.unshift({
+          type: 'main',
+          name: 'main',
+          groupId: 'main',
+          default: false,
+          autoselect: false,
+          forced: false,
+          id: -1,
+          attrs: new AttrList({}),
+          bitrate: 0,
+          url: ''
+        });
+      }
+    }
+    hls.trigger(Events.MANIFEST_LOADED, {
+      levels,
+      audioTracks,
+      subtitles,
+      captions,
+      contentSteering,
+      url,
+      stats,
+      networkDetails,
+      sessionData,
+      sessionKeys,
+      startTimeOffset,
+      variableList
+    });
+  }
+  handleTrackOrLevelPlaylist(response, stats, context, networkDetails, loader) {
+    const hls = this.hls;
+    const {
+      id,
+      level,
+      type
+    } = context;
+    const url = getResponseUrl(response, context);
+    const levelId = isFiniteNumber(level) ? level : isFiniteNumber(id) ? id : 0;
+    const levelType = mapContextToLevelType(context);
+    const levelDetails = M3U8Parser.parseLevelPlaylist(response.data, url, levelId, levelType, 0, this.variableList);
+
+    // We have done our first request (Manifest-type) and receive
+    // not a master playlist but a chunk-list (track/level)
+    // We fire the manifest-loaded event anyway with the parsed level-details
+    // by creating a single-level structure for it.
+    if (type === PlaylistContextType.MANIFEST) {
+      const singleLevel = {
+        attrs: new AttrList({}),
+        bitrate: 0,
+        details: levelDetails,
+        name: '',
+        url
+      };
+      levelDetails.requestScheduled = stats.loading.start + computeReloadInterval(levelDetails, 0);
+      hls.trigger(Events.MANIFEST_LOADED, {
+        levels: [singleLevel],
+        audioTracks: [],
+        url,
+        stats,
+        networkDetails,
+        sessionData: null,
+        sessionKeys: null,
+        contentSteering: null,
+        startTimeOffset: null,
+        variableList: null
+      });
+    }
+
+    // save parsing time
+    stats.parsing.end = performance.now();
+
+    // extend the context with the new levelDetails property
+    context.levelDetails = levelDetails;
+    this.handlePlaylistLoaded(levelDetails, response, stats, context, networkDetails, loader);
+  }
+  handleManifestParsingError(response, context, error, networkDetails, stats) {
+    this.hls.trigger(Events.ERROR, {
+      type: ErrorTypes.NETWORK_ERROR,
+      details: ErrorDetails.MANIFEST_PARSING_ERROR,
+      fatal: context.type === PlaylistContextType.MANIFEST,
+      url: response.url,
+      err: error,
+      error,
+      reason: error.message,
+      response,
+      context,
+      networkDetails,
+      stats
+    });
+  }
+  handleNetworkError(context, networkDetails, timeout = false, response, stats) {
+    let message = `A network ${timeout ? 'timeout' : 'error' + (response ? ' (status ' + response.code + ')' : '')} occurred while loading ${context.type}`;
+    if (context.type === PlaylistContextType.LEVEL) {
+      message += `: ${context.level} id: ${context.id}`;
+    } else if (context.type === PlaylistContextType.AUDIO_TRACK || context.type === PlaylistContextType.SUBTITLE_TRACK) {
+      message += ` id: ${context.id} group-id: "${context.groupId}"`;
+    }
+    const error = new Error(message);
+    this.hls.logger.warn(`[playlist-loader]: ${message}`);
+    let details = ErrorDetails.UNKNOWN;
+    let fatal = false;
+    const loader = this.getInternalLoader(context);
+    switch (context.type) {
+      case PlaylistContextType.MANIFEST:
+        details = timeout ? ErrorDetails.MANIFEST_LOAD_TIMEOUT : ErrorDetails.MANIFEST_LOAD_ERROR;
+        fatal = true;
+        break;
+      case PlaylistContextType.LEVEL:
+        details = timeout ? ErrorDetails.LEVEL_LOAD_TIMEOUT : ErrorDetails.LEVEL_LOAD_ERROR;
+        fatal = false;
+        break;
+      case PlaylistContextType.AUDIO_TRACK:
+        details = timeout ? ErrorDetails.AUDIO_TRACK_LOAD_TIMEOUT : ErrorDetails.AUDIO_TRACK_LOAD_ERROR;
+        fatal = false;
+        break;
+      case PlaylistContextType.SUBTITLE_TRACK:
+        details = timeout ? ErrorDetails.SUBTITLE_TRACK_LOAD_TIMEOUT : ErrorDetails.SUBTITLE_LOAD_ERROR;
+        fatal = false;
+        break;
+    }
+    if (loader) {
+      this.resetInternalLoader(context.type);
+    }
+    const errorData = {
+      type: ErrorTypes.NETWORK_ERROR,
+      details,
+      fatal,
+      url: context.url,
+      loader,
+      context,
+      error,
+      networkDetails,
+      stats
+    };
+    if (response) {
+      const url = (networkDetails == null ? void 0 : networkDetails.url) || context.url;
+      errorData.response = _objectSpread2({
+        url,
+        data: undefined
+      }, response);
+    }
+    this.hls.trigger(Events.ERROR, errorData);
+  }
+  handlePlaylistLoaded(levelDetails, response, stats, context, networkDetails, loader) {
+    const hls = this.hls;
+    const {
+      type,
+      level,
+      levelOrTrack,
+      id,
+      groupId,
+      deliveryDirectives
+    } = context;
+    const url = getResponseUrl(response, context);
+    const parent = mapContextToLevelType(context);
+    let levelIndex = typeof context.level === 'number' && parent === PlaylistLevelType.MAIN ? level : undefined;
+    const error = levelDetails.playlistParsingError;
+    if (error) {
+      this.hls.logger.warn(`${error} ${levelDetails.url}`);
+      if (!hls.config.ignorePlaylistParsingErrors) {
+        hls.trigger(Events.ERROR, {
+          type: ErrorTypes.NETWORK_ERROR,
+          details: ErrorDetails.LEVEL_PARSING_ERROR,
+          fatal: false,
+          url,
+          error,
+          reason: error.message,
+          response,
+          context,
+          level: levelIndex,
+          parent,
+          networkDetails,
+          stats
+        });
+        return;
+      }
+      levelDetails.playlistParsingError = null;
+    }
+    if (!levelDetails.fragments.length) {
+      const _error = levelDetails.playlistParsingError = new Error('No Segments found in Playlist');
+      hls.trigger(Events.ERROR, {
+        type: ErrorTypes.NETWORK_ERROR,
+        details: ErrorDetails.LEVEL_EMPTY_ERROR,
+        fatal: false,
+        url,
+        error: _error,
+        reason: _error.message,
+        response,
+        context,
+        level: levelIndex,
+        parent,
+        networkDetails,
+        stats
+      });
+      return;
+    }
+    if (levelDetails.live && loader) {
+      if (loader.getCacheAge) {
+        levelDetails.ageHeader = loader.getCacheAge() || 0;
+      }
+      if (!loader.getCacheAge || isNaN(levelDetails.ageHeader)) {
+        levelDetails.ageHeader = 0;
+      }
+    }
+    switch (type) {
+      case PlaylistContextType.MANIFEST:
+      case PlaylistContextType.LEVEL:
+        if (levelIndex) {
+          if (!levelOrTrack) {
+            // fall-through to hls.levels[0]
+            levelIndex = 0;
+          } else {
+            if (levelOrTrack !== hls.levels[levelIndex]) {
+              // correct levelIndex when lower levels were removed from hls.levels
+              const updatedIndex = hls.levels.indexOf(levelOrTrack);
+              if (updatedIndex > -1) {
+                levelIndex = updatedIndex;
+              }
+            }
+          }
+        }
+        hls.trigger(Events.LEVEL_LOADED, {
+          details: levelDetails,
+          levelInfo: levelOrTrack || hls.levels[0],
+          level: levelIndex || 0,
+          id: id || 0,
+          stats,
+          networkDetails,
+          deliveryDirectives,
+          withoutMultiVariant: type === PlaylistContextType.MANIFEST
+        });
+        break;
+      case PlaylistContextType.AUDIO_TRACK:
+        hls.trigger(Events.AUDIO_TRACK_LOADED, {
+          details: levelDetails,
+          track: levelOrTrack,
+          id: id || 0,
+          groupId: groupId || '',
+          stats,
+          networkDetails,
+          deliveryDirectives
+        });
+        break;
+      case PlaylistContextType.SUBTITLE_TRACK:
+        hls.trigger(Events.SUBTITLE_TRACK_LOADED, {
+          details: levelDetails,
+          track: levelOrTrack,
+          id: id || 0,
+          groupId: groupId || '',
+          stats,
+          networkDetails,
+          deliveryDirectives
+        });
+        break;
+    }
+  }
+}
+
+/**
+ * The `Hls` class is the core of the HLS.js library used to instantiate player instances.
+ * @public
+ */
+class Hls {
+  /**
+   * Get the video-dev/hls.js package version.
+   */
+  static get version() {
+    return version;
+  }
+
+  /**
+   * Check if the required MediaSource Extensions are available.
+   */
+  static isMSESupported() {
+    return isMSESupported();
+  }
+
+  /**
+   * Check if MediaSource Extensions are available and isTypeSupported checks pass for any baseline codecs.
+   */
+  static isSupported() {
+    return isSupported();
+  }
+
+  /**
+   * Get the MediaSource global used for MSE playback (ManagedMediaSource, MediaSource, or WebKitMediaSource).
+   */
+  static getMediaSource() {
+    return getMediaSource();
+  }
+  static get Events() {
+    return Events;
+  }
+  static get MetadataSchema() {
+    return MetadataSchema;
+  }
+  static get ErrorTypes() {
+    return ErrorTypes;
+  }
+  static get ErrorDetails() {
+    return ErrorDetails;
+  }
+
+  /**
+   * Get the default configuration applied to new instances.
+   */
+  static get DefaultConfig() {
+    if (!Hls.defaultConfig) {
+      return hlsDefaultConfig;
+    }
+    return Hls.defaultConfig;
+  }
+
+  /**
+   * Replace the default configuration applied to new instances.
+   */
+  static set DefaultConfig(defaultConfig) {
+    Hls.defaultConfig = defaultConfig;
+  }
+
+  /**
+   * Creates an instance of an HLS client that can attach to exactly one `HTMLMediaElement`.
+   * @param userConfig - Configuration options applied over `Hls.DefaultConfig`
+   */
+  constructor(userConfig = {}) {
+    /**
+     * The runtime configuration used by the player. At instantiation this is combination of `hls.userConfig` merged over `Hls.DefaultConfig`.
+     */
+    this.config = void 0;
+    /**
+     * The configuration object provided on player instantiation.
+     */
+    this.userConfig = void 0;
+    /**
+     * The logger functions used by this player instance, configured on player instantiation.
+     */
+    this.logger = void 0;
+    this.coreComponents = void 0;
+    this.networkControllers = void 0;
+    this._emitter = new EventEmitter();
+    this._autoLevelCapping = -1;
+    this._maxHdcpLevel = null;
+    this.abrController = void 0;
+    this.bufferController = void 0;
+    this.capLevelController = void 0;
+    this.latencyController = void 0;
+    this.levelController = void 0;
+    this.streamController = void 0;
+    this.audioStreamController = void 0;
+    this.subtititleStreamController = void 0;
+    this.audioTrackController = void 0;
+    this.subtitleTrackController = void 0;
+    this.interstitialsController = void 0;
+    this.gapController = void 0;
+    this.emeController = void 0;
+    this.cmcdController = void 0;
+    this._media = null;
+    this._url = null;
+    this._sessionId = void 0;
+    this.triggeringException = void 0;
+    this.started = false;
+    const logger = this.logger = enableLogs(userConfig.debug || false, 'Hls instance', userConfig.assetPlayerId);
+    const config = this.config = mergeConfig(Hls.DefaultConfig, userConfig, logger);
+    this.userConfig = userConfig;
+    if (config.progressive) {
+      enableStreamingMode(config, logger);
+    }
+
+    // core controllers and network loaders
+    const {
+      abrController: _AbrController,
+      bufferController: _BufferController,
+      capLevelController: _CapLevelController,
+      errorController: _ErrorController,
+      fpsController: _FpsController
+    } = config;
+    const errorController = new _ErrorController(this);
+    const abrController = this.abrController = new _AbrController(this);
+    // FragmentTracker must be defined before StreamController because the order of event handling is important
+    const fragmentTracker = new FragmentTracker(this);
+    const _InterstitialsController = config.interstitialsController;
+    const interstitialsController = _InterstitialsController ? this.interstitialsController = new _InterstitialsController(this, Hls) : null;
+    const bufferController = this.bufferController = new _BufferController(this, fragmentTracker);
+    const capLevelController = this.capLevelController = new _CapLevelController(this);
+    const fpsController = new _FpsController(this);
+    const playListLoader = new PlaylistLoader(this);
+    const _ContentSteeringController = config.contentSteeringController;
+    // Instantiate ConentSteeringController before LevelController to receive Multivariant Playlist events first
+    const contentSteering = _ContentSteeringController ? new _ContentSteeringController(this) : null;
+    const levelController = this.levelController = new LevelController(this, contentSteering);
+    const id3TrackController = new ID3TrackController(this);
+    const keyLoader = new KeyLoader(this.config, this.logger);
+    const streamController = this.streamController = new StreamController(this, fragmentTracker, keyLoader);
+    const gapController = this.gapController = new GapController(this, fragmentTracker);
+
+    // Cap level controller uses streamController to flush the buffer
+    capLevelController.setStreamController(streamController);
+    // fpsController uses streamController to switch when frames are being dropped
+    fpsController.setStreamController(streamController);
+    const networkControllers = [playListLoader, levelController, streamController];
+    if (interstitialsController) {
+      networkControllers.splice(1, 0, interstitialsController);
+    }
+    if (contentSteering) {
+      networkControllers.splice(1, 0, contentSteering);
+    }
+    this.networkControllers = networkControllers;
+    const coreComponents = [abrController, bufferController, gapController, capLevelController, fpsController, id3TrackController, fragmentTracker];
+    this.audioTrackController = this.createController(config.audioTrackController, networkControllers);
+    const AudioStreamControllerClass = config.audioStreamController;
+    if (AudioStreamControllerClass) {
+      networkControllers.push(this.audioStreamController = new AudioStreamControllerClass(this, fragmentTracker, keyLoader));
+    }
+    // Instantiate subtitleTrackController before SubtitleStreamController to receive level events first
+    this.subtitleTrackController = this.createController(config.subtitleTrackController, networkControllers);
+    const SubtitleStreamControllerClass = config.subtitleStreamController;
+    if (SubtitleStreamControllerClass) {
+      networkControllers.push(this.subtititleStreamController = new SubtitleStreamControllerClass(this, fragmentTracker, keyLoader));
+    }
+    this.createController(config.timelineController, coreComponents);
+    keyLoader.emeController = this.emeController = this.createController(config.emeController, coreComponents);
+    this.cmcdController = this.createController(config.cmcdController, coreComponents);
+    this.latencyController = this.createController(LatencyController, coreComponents);
+    this.coreComponents = coreComponents;
+
+    // Error controller handles errors before and after all other controllers
+    // This listener will be invoked after all other controllers error listeners
+    networkControllers.push(errorController);
+    const onErrorOut = errorController.onErrorOut;
+    if (typeof onErrorOut === 'function') {
+      this.on(Events.ERROR, onErrorOut, errorController);
+    }
+    // Autostart load handler
+    this.on(Events.MANIFEST_LOADED, playListLoader.onManifestLoaded, playListLoader);
+  }
+  createController(ControllerClass, components) {
+    if (ControllerClass) {
+      const controllerInstance = new ControllerClass(this);
+      if (components) {
+        components.push(controllerInstance);
+      }
+      return controllerInstance;
+    }
+    return null;
+  }
+
+  // Delegate the EventEmitter through the public API of Hls.js
+  on(event, listener, context = this) {
+    this._emitter.on(event, listener, context);
+  }
+  once(event, listener, context = this) {
+    this._emitter.once(event, listener, context);
+  }
+  removeAllListeners(event) {
+    this._emitter.removeAllListeners(event);
+  }
+  off(event, listener, context = this, once) {
+    this._emitter.off(event, listener, context, once);
+  }
+  listeners(event) {
+    return this._emitter.listeners(event);
+  }
+  emit(event, name, eventObject) {
+    return this._emitter.emit(event, name, eventObject);
+  }
+  trigger(event, eventObject) {
+    if (this.config.debug) {
+      return this.emit(event, event, eventObject);
+    } else {
+      try {
+        return this.emit(event, event, eventObject);
+      } catch (error) {
+        this.logger.error('An internal error happened while handling event ' + event + '. Error message: "' + error.message + '". Here is a stacktrace:', error);
+        // Prevent recursion in error event handlers that throw #5497
+        if (!this.triggeringException) {
+          this.triggeringException = true;
+          const fatal = event === Events.ERROR;
+          this.trigger(Events.ERROR, {
+            type: ErrorTypes.OTHER_ERROR,
+            details: ErrorDetails.INTERNAL_EXCEPTION,
+            fatal,
+            event,
+            error
+          });
+          this.triggeringException = false;
+        }
+      }
+    }
+    return false;
+  }
+  listenerCount(event) {
+    return this._emitter.listenerCount(event);
+  }
+
+  /**
+   * Dispose of the instance
+   */
+  destroy() {
+    this.logger.log('destroy');
+    this.trigger(Events.DESTROYING, undefined);
+    this.detachMedia();
+    this.removeAllListeners();
+    this._autoLevelCapping = -1;
+    this._url = null;
+    this.networkControllers.forEach(component => component.destroy());
+    this.networkControllers.length = 0;
+    this.coreComponents.forEach(component => component.destroy());
+    this.coreComponents.length = 0;
+    // Remove any references that could be held in config options or callbacks
+    const config = this.config;
+    config.xhrSetup = config.fetchSetup = undefined;
+    // @ts-ignore
+    this.userConfig = null;
+  }
+
+  /**
+   * Attaches Hls.js to a media element
+   */
+  attachMedia(data) {
+    if (!data || 'media' in data && !data.media) {
+      const error = new Error(`attachMedia failed: invalid argument (${data})`);
+      this.trigger(Events.ERROR, {
+        type: ErrorTypes.OTHER_ERROR,
+        details: ErrorDetails.ATTACH_MEDIA_ERROR,
+        fatal: true,
+        error
+      });
+      return;
+    }
+    this.logger.log(`attachMedia`);
+    if (this._media) {
+      this.logger.warn(`media must be detached before attaching`);
+      this.detachMedia();
+    }
+    const attachMediaSource = 'media' in data;
+    const media = attachMediaSource ? data.media : data;
+    const attachingData = attachMediaSource ? data : {
+      media
+    };
+    this._media = media;
+    this.trigger(Events.MEDIA_ATTACHING, attachingData);
+  }
+
+  /**
+   * Detach Hls.js from the media
+   */
+  detachMedia() {
+    this.logger.log('detachMedia');
+    this.trigger(Events.MEDIA_DETACHING, {});
+    this._media = null;
+  }
+
+  /**
+   * Detach HTMLMediaElement, MediaSource, and SourceBuffers without reset, for attaching to another instance
+   */
+  transferMedia() {
+    this._media = null;
+    const transferMedia = this.bufferController.transferMedia();
+    this.trigger(Events.MEDIA_DETACHING, {
+      transferMedia
+    });
+    return transferMedia;
+  }
+
+  /**
+   * Set the source URL. Can be relative or absolute.
+   */
+  loadSource(url) {
+    this.stopLoad();
+    const media = this.media;
+    const loadedSource = this._url;
+    const loadingSource = this._url = urlToolkitExports.buildAbsoluteURL(self.location.href, url, {
+      alwaysNormalize: true
+    });
+    this._autoLevelCapping = -1;
+    this._maxHdcpLevel = null;
+    this.logger.log(`loadSource:${loadingSource}`);
+    if (media && loadedSource && (loadedSource !== loadingSource || this.bufferController.hasSourceTypes())) {
+      // Remove and re-create MediaSource
+      this.detachMedia();
+      this.attachMedia(media);
+    }
+    // when attaching to a source URL, trigger a playlist load
+    this.trigger(Events.MANIFEST_LOADING, {
+      url: url
+    });
+  }
+
+  /**
+   * Gets the currently loaded URL
+   */
+  get url() {
+    return this._url;
+  }
+
+  /**
+   * Whether or not enough has been buffered to seek to start position or use `media.currentTime` to determine next load position
+   */
+  get hasEnoughToStart() {
+    return this.streamController.hasEnoughToStart;
+  }
+
+  /**
+   * Get the startPosition set on startLoad(position) or on autostart with config.startPosition
+   */
+  get startPosition() {
+    return this.streamController.startPositionValue;
+  }
+
+  /**
+   * Start loading data from the stream source.
+   * Depending on default config, client starts loading automatically when a source is set.
+   *
+   * @param startPosition - Set the start position to stream from.
+   * Defaults to -1 (None: starts from earliest point)
+   */
+  startLoad(startPosition = -1, skipSeekToStartPosition) {
+    this.logger.log(`startLoad(${startPosition + (skipSeekToStartPosition ? ', <skip seek to start>' : '')})`);
+    this.started = true;
+    this.resumeBuffering();
+    for (let i = 0; i < this.networkControllers.length; i++) {
+      this.networkControllers[i].startLoad(startPosition, skipSeekToStartPosition);
+      if (!this.started || !this.networkControllers) {
+        break;
+      }
+    }
+  }
+
+  /**
+   * Stop loading of any stream data.
+   */
+  stopLoad() {
+    this.logger.log('stopLoad');
+    this.started = false;
+    for (let i = 0; i < this.networkControllers.length; i++) {
+      this.networkControllers[i].stopLoad();
+      if (this.started || !this.networkControllers) {
+        break;
+      }
+    }
+  }
+
+  /**
+   * Returns whether loading, toggled with `startLoad()` and `stopLoad()`, is active or not`.
+   */
+  get loadingEnabled() {
+    return this.started;
+  }
+
+  /**
+   * Returns state of fragment loading toggled by calling `pauseBuffering()` and `resumeBuffering()`.
+   */
+  get bufferingEnabled() {
+    return this.streamController.bufferingEnabled;
+  }
+
+  /**
+   * Resumes stream controller segment loading after `pauseBuffering` has been called.
+   */
+  resumeBuffering() {
+    if (!this.bufferingEnabled) {
+      this.logger.log(`resume buffering`);
+      this.networkControllers.forEach(controller => {
+        if (controller.resumeBuffering) {
+          controller.resumeBuffering();
+        }
+      });
+    }
+  }
+
+  /**
+   * Prevents stream controller from loading new segments until `resumeBuffering` is called.
+   * This allows for media buffering to be paused without interupting playlist loading.
+   */
+  pauseBuffering() {
+    if (this.bufferingEnabled) {
+      this.logger.log(`pause buffering`);
+      this.networkControllers.forEach(controller => {
+        if (controller.pauseBuffering) {
+          controller.pauseBuffering();
+        }
+      });
+    }
+  }
+  get inFlightFragments() {
+    const inFlightData = {
+      [PlaylistLevelType.MAIN]: this.streamController.inFlightFrag
+    };
+    if (this.audioStreamController) {
+      inFlightData[PlaylistLevelType.AUDIO] = this.audioStreamController.inFlightFrag;
+    }
+    if (this.subtititleStreamController) {
+      inFlightData[PlaylistLevelType.SUBTITLE] = this.subtititleStreamController.inFlightFrag;
+    }
+    return inFlightData;
+  }
+
+  /**
+   * Swap through possible audio codecs in the stream (for example to switch from stereo to 5.1)
+   */
+  swapAudioCodec() {
+    this.logger.log('swapAudioCodec');
+    this.streamController.swapAudioCodec();
+  }
+
+  /**
+   * When the media-element fails, this allows to detach and then re-attach it
+   * as one call (convenience method).
+   *
+   * Automatic recovery of media-errors by this process is configurable.
+   */
+  recoverMediaError() {
+    this.logger.log('recoverMediaError');
+    const media = this._media;
+    const time = media == null ? void 0 : media.currentTime;
+    this.detachMedia();
+    if (media) {
+      this.attachMedia(media);
+      if (time) {
+        this.startLoad(time);
+      }
+    }
+  }
+  removeLevel(levelIndex) {
+    this.levelController.removeLevel(levelIndex);
+  }
+
+  /**
+   * @returns a UUID for this player instance
+   */
+  get sessionId() {
+    let _sessionId = this._sessionId;
+    if (!_sessionId) {
+      _sessionId = this._sessionId = uuid();
+    }
+    return _sessionId;
+  }
+
+  /**
+   * @returns an array of levels (variants) sorted by HDCP-LEVEL, RESOLUTION (height), FRAME-RATE, CODECS, VIDEO-RANGE, and BANDWIDTH
+   */
+  get levels() {
+    const levels = this.levelController.levels;
+    return levels ? levels : [];
+  }
+
+  /**
+   * @returns LevelDetails of last loaded level (variant) or `null` prior to loading a media playlist.
+   */
+  get latestLevelDetails() {
+    return this.streamController.getLevelDetails() || null;
+  }
+
+  /**
+   * @returns Level object of selected level (variant) or `null` prior to selecting a level or once the level is removed.
+   */
+  get loadLevelObj() {
+    return this.levelController.loadLevelObj;
+  }
+
+  /**
+   * Index of quality level (variant) currently played
+   */
+  get currentLevel() {
+    return this.streamController.currentLevel;
+  }
+
+  /**
+   * Set quality level index immediately. This will flush the current buffer to replace the quality asap. That means playback will interrupt at least shortly to re-buffer and re-sync eventually. Set to -1 for automatic level selection.
+   */
+  set currentLevel(newLevel) {
+    this.logger.log(`set currentLevel:${newLevel}`);
+    this.levelController.manualLevel = newLevel;
+    this.streamController.immediateLevelSwitch();
+  }
+
+  /**
+   * Index of next quality level loaded as scheduled by stream controller.
+   */
+  get nextLevel() {
+    return this.streamController.nextLevel;
+  }
+
+  /**
+   * Set quality level index for next loaded data.
+   * This will switch the video quality asap, without interrupting playback.
+   * May abort current loading of data, and flush parts of buffer (outside currently played fragment region).
+   * @param newLevel - Pass -1 for automatic level selection
+   */
+  set nextLevel(newLevel) {
+    this.logger.log(`set nextLevel:${newLevel}`);
+    this.levelController.manualLevel = newLevel;
+    this.streamController.nextLevelSwitch();
+  }
+
+  /**
+   * Return the quality level of the currently or last (of none is loaded currently) segment
+   */
+  get loadLevel() {
+    return this.levelController.level;
+  }
+
+  /**
+   * Set quality level index for next loaded data in a conservative way.
+   * This will switch the quality without flushing, but interrupt current loading.
+   * Thus the moment when the quality switch will appear in effect will only be after the already existing buffer.
+   * @param newLevel - Pass -1 for automatic level selection
+   */
+  set loadLevel(newLevel) {
+    this.logger.log(`set loadLevel:${newLevel}`);
+    this.levelController.manualLevel = newLevel;
+  }
+
+  /**
+   * get next quality level loaded
+   */
+  get nextLoadLevel() {
+    return this.levelController.nextLoadLevel;
+  }
+
+  /**
+   * Set quality level of next loaded segment in a fully "non-destructive" way.
+   * Same as `loadLevel` but will wait for next switch (until current loading is done).
+   */
+  set nextLoadLevel(level) {
+    this.levelController.nextLoadLevel = level;
+  }
+
+  /**
+   * Return "first level": like a default level, if not set,
+   * falls back to index of first level referenced in manifest
+   */
+  get firstLevel() {
+    return Math.max(this.levelController.firstLevel, this.minAutoLevel);
+  }
+
+  /**
+   * Sets "first-level", see getter.
+   */
+  set firstLevel(newLevel) {
+    this.logger.log(`set firstLevel:${newLevel}`);
+    this.levelController.firstLevel = newLevel;
+  }
+
+  /**
+   * Return the desired start level for the first fragment that will be loaded.
+   * The default value of -1 indicates automatic start level selection.
+   * Setting hls.nextAutoLevel without setting a startLevel will result in
+   * the nextAutoLevel value being used for one fragment load.
+   */
+  get startLevel() {
+    const startLevel = this.levelController.startLevel;
+    if (startLevel === -1 && this.abrController.forcedAutoLevel > -1) {
+      return this.abrController.forcedAutoLevel;
+    }
+    return startLevel;
+  }
+
+  /**
+   * set  start level (level of first fragment that will be played back)
+   * if not overrided by user, first level appearing in manifest will be used as start level
+   * if -1 : automatic start level selection, playback will start from level matching download bandwidth
+   * (determined from download of first segment)
+   */
+  set startLevel(newLevel) {
+    this.logger.log(`set startLevel:${newLevel}`);
+    // if not in automatic start level detection, ensure startLevel is greater than minAutoLevel
+    if (newLevel !== -1) {
+      newLevel = Math.max(newLevel, this.minAutoLevel);
+    }
+    this.levelController.startLevel = newLevel;
+  }
+
+  /**
+   * Whether level capping is enabled.
+   * Default value is set via `config.capLevelToPlayerSize`.
+   */
+  get capLevelToPlayerSize() {
+    return this.config.capLevelToPlayerSize;
+  }
+
+  /**
+   * Enables or disables level capping. If disabled after previously enabled, `nextLevelSwitch` will be immediately called.
+   */
+  set capLevelToPlayerSize(shouldStartCapping) {
+    const newCapLevelToPlayerSize = !!shouldStartCapping;
+    if (newCapLevelToPlayerSize !== this.config.capLevelToPlayerSize) {
+      if (newCapLevelToPlayerSize) {
+        this.capLevelController.startCapping(); // If capping occurs, nextLevelSwitch will happen based on size.
+      } else {
+        this.capLevelController.stopCapping();
+        this.autoLevelCapping = -1;
+        this.streamController.nextLevelSwitch(); // Now we're uncapped, get the next level asap.
+      }
+      this.config.capLevelToPlayerSize = newCapLevelToPlayerSize;
+    }
+  }
+
+  /**
+   * Capping/max level value that should be used by automatic level selection algorithm (`ABRController`)
+   */
+  get autoLevelCapping() {
+    return this._autoLevelCapping;
+  }
+
+  /**
+   * Returns the current bandwidth estimate in bits per second, when available. Otherwise, `NaN` is returned.
+   */
+  get bandwidthEstimate() {
+    const {
+      bwEstimator
+    } = this.abrController;
+    if (!bwEstimator) {
+      return NaN;
+    }
+    return bwEstimator.getEstimate();
+  }
+  set bandwidthEstimate(abrEwmaDefaultEstimate) {
+    this.abrController.resetEstimator(abrEwmaDefaultEstimate);
+  }
+  get abrEwmaDefaultEstimate() {
+    const {
+      bwEstimator
+    } = this.abrController;
+    if (!bwEstimator) {
+      return NaN;
+    }
+    return bwEstimator.defaultEstimate;
+  }
+
+  /**
+   * get time to first byte estimate
+   * @type {number}
+   */
+  get ttfbEstimate() {
+    const {
+      bwEstimator
+    } = this.abrController;
+    if (!bwEstimator) {
+      return NaN;
+    }
+    return bwEstimator.getEstimateTTFB();
+  }
+
+  /**
+   * Capping/max level value that should be used by automatic level selection algorithm (`ABRController`)
+   */
+  set autoLevelCapping(newLevel) {
+    if (this._autoLevelCapping !== newLevel) {
+      this.logger.log(`set autoLevelCapping:${newLevel}`);
+      this._autoLevelCapping = newLevel;
+      this.levelController.checkMaxAutoUpdated();
+    }
+  }
+  get maxHdcpLevel() {
+    return this._maxHdcpLevel;
+  }
+  set maxHdcpLevel(value) {
+    if (isHdcpLevel(value) && this._maxHdcpLevel !== value) {
+      this._maxHdcpLevel = value;
+      this.levelController.checkMaxAutoUpdated();
+    }
+  }
+
+  /**
+   * True when automatic level selection enabled
+   */
+  get autoLevelEnabled() {
+    return this.levelController.manualLevel === -1;
+  }
+
+  /**
+   * Level set manually (if any)
+   */
+  get manualLevel() {
+    return this.levelController.manualLevel;
+  }
+
+  /**
+   * min level selectable in auto mode according to config.minAutoBitrate
+   */
+  get minAutoLevel() {
+    const {
+      levels,
+      config: {
+        minAutoBitrate
+      }
+    } = this;
+    if (!levels) return 0;
+    const len = levels.length;
+    for (let i = 0; i < len; i++) {
+      if (levels[i].maxBitrate >= minAutoBitrate) {
+        return i;
+      }
+    }
+    return 0;
+  }
+
+  /**
+   * max level selectable in auto mode according to autoLevelCapping
+   */
+  get maxAutoLevel() {
+    const {
+      levels,
+      autoLevelCapping,
+      maxHdcpLevel
+    } = this;
+    let maxAutoLevel;
+    if (autoLevelCapping === -1 && levels != null && levels.length) {
+      maxAutoLevel = levels.length - 1;
+    } else {
+      maxAutoLevel = autoLevelCapping;
+    }
+    if (maxHdcpLevel) {
+      for (let i = maxAutoLevel; i--;) {
+        const hdcpLevel = levels[i].attrs['HDCP-LEVEL'];
+        if (hdcpLevel && hdcpLevel <= maxHdcpLevel) {
+          return i;
+        }
+      }
+    }
+    return maxAutoLevel;
+  }
+  get firstAutoLevel() {
+    return this.abrController.firstAutoLevel;
+  }
+
+  /**
+   * next automatically selected quality level
+   */
+  get nextAutoLevel() {
+    return this.abrController.nextAutoLevel;
+  }
+
+  /**
+   * this setter is used to force next auto level.
+   * this is useful to force a switch down in auto mode:
+   * in case of load error on level N, hls.js can set nextAutoLevel to N-1 for example)
+   * forced value is valid for one fragment. upon successful frag loading at forced level,
+   * this value will be resetted to -1 by ABR controller.
+   */
+  set nextAutoLevel(nextLevel) {
+    this.abrController.nextAutoLevel = nextLevel;
+  }
+
+  /**
+   * get the datetime value relative to media.currentTime for the active level Program Date Time if present
+   */
+  get playingDate() {
+    return this.streamController.currentProgramDateTime;
+  }
+  get mainForwardBufferInfo() {
+    return this.streamController.getMainFwdBufferInfo();
+  }
+  get maxBufferLength() {
+    return this.streamController.maxBufferLength;
+  }
+
+  /**
+   * Find and select the best matching audio track, making a level switch when a Group change is necessary.
+   * Updates `hls.config.audioPreference`. Returns the selected track, or null when no matching track is found.
+   */
+  setAudioOption(audioOption) {
+    var _this$audioTrackContr;
+    return ((_this$audioTrackContr = this.audioTrackController) == null ? void 0 : _this$audioTrackContr.setAudioOption(audioOption)) || null;
+  }
+  /**
+   * Find and select the best matching subtitle track, making a level switch when a Group change is necessary.
+   * Updates `hls.config.subtitlePreference`. Returns the selected track, or null when no matching track is found.
+   */
+  setSubtitleOption(subtitleOption) {
+    var _this$subtitleTrackCo;
+    return ((_this$subtitleTrackCo = this.subtitleTrackController) == null ? void 0 : _this$subtitleTrackCo.setSubtitleOption(subtitleOption)) || null;
+  }
+
+  /**
+   * Get the complete list of audio tracks across all media groups
+   */
+  get allAudioTracks() {
+    const audioTrackController = this.audioTrackController;
+    return audioTrackController ? audioTrackController.allAudioTracks : [];
+  }
+
+  /**
+   * Get the list of selectable audio tracks
+   */
+  get audioTracks() {
+    const audioTrackController = this.audioTrackController;
+    return audioTrackController ? audioTrackController.audioTracks : [];
+  }
+
+  /**
+   * index of the selected audio track (index in audio track lists)
+   */
+  get audioTrack() {
+    const audioTrackController = this.audioTrackController;
+    return audioTrackController ? audioTrackController.audioTrack : -1;
+  }
+
+  /**
+   * selects an audio track, based on its index in audio track lists
+   */
+  set audioTrack(audioTrackId) {
+    const audioTrackController = this.audioTrackController;
+    if (audioTrackController) {
+      audioTrackController.audioTrack = audioTrackId;
+    }
+  }
+
+  /**
+   * get the complete list of subtitle tracks across all media groups
+   */
+  get allSubtitleTracks() {
+    const subtitleTrackController = this.subtitleTrackController;
+    return subtitleTrackController ? subtitleTrackController.allSubtitleTracks : [];
+  }
+
+  /**
+   * get alternate subtitle tracks list from playlist
+   */
+  get subtitleTracks() {
+    const subtitleTrackController = this.subtitleTrackController;
+    return subtitleTrackController ? subtitleTrackController.subtitleTracks : [];
+  }
+
+  /**
+   * index of the selected subtitle track (index in subtitle track lists)
+   */
+  get subtitleTrack() {
+    const subtitleTrackController = this.subtitleTrackController;
+    return subtitleTrackController ? subtitleTrackController.subtitleTrack : -1;
+  }
+  get media() {
+    return this._media;
+  }
+
+  /**
+   * select an subtitle track, based on its index in subtitle track lists
+   */
+  set subtitleTrack(subtitleTrackId) {
+    const subtitleTrackController = this.subtitleTrackController;
+    if (subtitleTrackController) {
+      subtitleTrackController.subtitleTrack = subtitleTrackId;
+    }
+  }
+
+  /**
+   * Whether subtitle display is enabled or not
+   */
+  get subtitleDisplay() {
+    const subtitleTrackController = this.subtitleTrackController;
+    return subtitleTrackController ? subtitleTrackController.subtitleDisplay : false;
+  }
+
+  /**
+   * Enable/disable subtitle display rendering
+   */
+  set subtitleDisplay(value) {
+    const subtitleTrackController = this.subtitleTrackController;
+    if (subtitleTrackController) {
+      subtitleTrackController.subtitleDisplay = value;
+    }
+  }
+
+  /**
+   * get mode for Low-Latency HLS loading
+   */
+  get lowLatencyMode() {
+    return this.config.lowLatencyMode;
+  }
+
+  /**
+   * Enable/disable Low-Latency HLS part playlist and segment loading, and start live streams at playlist PART-HOLD-BACK rather than HOLD-BACK.
+   */
+  set lowLatencyMode(mode) {
+    this.config.lowLatencyMode = mode;
+  }
+
+  /**
+   * Position (in seconds) of live sync point (ie edge of live position minus safety delay defined by ```hls.config.liveSyncDuration```)
+   * @returns null prior to loading live Playlist
+   */
+  get liveSyncPosition() {
+    return this.latencyController.liveSyncPosition;
+  }
+
+  /**
+   * Estimated position (in seconds) of live edge (ie edge of live playlist plus time sync playlist advanced)
+   * @returns 0 before first playlist is loaded
+   */
+  get latency() {
+    return this.latencyController.latency;
+  }
+
+  /**
+   * maximum distance from the edge before the player seeks forward to ```hls.liveSyncPosition```
+   * configured using ```liveMaxLatencyDurationCount``` (multiple of target duration) or ```liveMaxLatencyDuration```
+   * @returns 0 before first playlist is loaded
+   */
+  get maxLatency() {
+    return this.latencyController.maxLatency;
+  }
+
+  /**
+   * target distance from the edge as calculated by the latency controller
+   */
+  get targetLatency() {
+    return this.latencyController.targetLatency;
+  }
+  set targetLatency(latency) {
+    this.latencyController.targetLatency = latency;
+  }
+
+  /**
+   * the rate at which the edge of the current live playlist is advancing or 1 if there is none
+   */
+  get drift() {
+    return this.latencyController.drift;
+  }
+
+  /**
+   * set to true when startLoad is called before MANIFEST_PARSED event
+   */
+  get forceStartLoad() {
+    return this.streamController.forceStartLoad;
+  }
+
+  /**
+   * ContentSteering pathways getter
+   */
+  get pathways() {
+    return this.levelController.pathways;
+  }
+
+  /**
+   * ContentSteering pathwayPriority getter/setter
+   */
+  get pathwayPriority() {
+    return this.levelController.pathwayPriority;
+  }
+  set pathwayPriority(pathwayPriority) {
+    this.levelController.pathwayPriority = pathwayPriority;
+  }
+
+  /**
+   * returns true when all SourceBuffers are buffered to the end
+   */
+  get bufferedToEnd() {
+    var _this$bufferControlle;
+    return !!((_this$bufferControlle = this.bufferController) != null && _this$bufferControlle.bufferedToEnd);
+  }
+
+  /**
+   * returns Interstitials Program Manager
+   */
+  get interstitialsManager() {
+    var _this$interstitialsCo;
+    return ((_this$interstitialsCo = this.interstitialsController) == null ? void 0 : _this$interstitialsCo.interstitialsManager) || null;
+  }
+
+  /**
+   * returns mediaCapabilities.decodingInfo for a variant/rendition
+   */
+  getMediaDecodingInfo(level, audioTracks = this.allAudioTracks) {
+    const audioTracksByGroup = getAudioTracksByGroup(audioTracks);
+    return getMediaDecodingInfoPromise(level, audioTracksByGroup, navigator.mediaCapabilities);
+  }
+}
+Hls.defaultConfig = void 0;
+
+export { AbrController, AttrList, AudioStreamController, AudioTrackController, BasePlaylistController, BaseSegment, BaseStreamController, BufferController, CMCDController, CapLevelController, ChunkMetadata, ContentSteeringController, Cues, DateRange, EMEController, ErrorActionFlags, ErrorController, ErrorDetails, ErrorTypes, Events, FPSController, FetchLoader, Fragment, Hls, HlsSkip, HlsUrlParameters, KeySystemFormats, KeySystems, Level, LevelDetails, LevelKey, LoadStats, M3U8Parser, MetadataSchema, NetworkErrorAction, Part, PlaylistLevelType, SubtitleStreamController, SubtitleTrackController, TimelineController, XhrLoader, Hls as default, fetchSupported, getMediaSource, isMSESupported, isSupported, requestMediaKeySystemAccess };