mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-19 16:47:01 +03:00
Álvaro Velad Galván
9e2b15ead4
Simplifies subtitle management for sequence mode and segments mode Runs subtitle tests in segments mode as well (Tizen 3.0) Fixes: https://github.com/shaka-project/shaka-player/issues/7447
2500 lines
85 KiB
JavaScript
2500 lines
85 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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goog.provide('shaka.media.MediaSourceEngine');
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goog.require('goog.asserts');
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goog.require('shaka.log');
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goog.require('shaka.config.CodecSwitchingStrategy');
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goog.require('shaka.media.Capabilities');
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goog.require('shaka.media.ContentWorkarounds');
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goog.require('shaka.media.ClosedCaptionParser');
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goog.require('shaka.media.IClosedCaptionParser');
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goog.require('shaka.media.ManifestParser');
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goog.require('shaka.media.SegmentReference');
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goog.require('shaka.media.TimeRangesUtils');
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goog.require('shaka.text.TextEngine');
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goog.require('shaka.transmuxer.TransmuxerEngine');
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goog.require('shaka.util.BufferUtils');
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goog.require('shaka.util.Destroyer');
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goog.require('shaka.util.Dom');
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goog.require('shaka.util.Error');
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goog.require('shaka.util.EventManager');
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goog.require('shaka.util.FakeEvent');
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goog.require('shaka.util.Functional');
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goog.require('shaka.util.IDestroyable');
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goog.require('shaka.util.Id3Utils');
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goog.require('shaka.util.ManifestParserUtils');
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goog.require('shaka.util.MimeUtils');
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goog.require('shaka.util.Mp4BoxParsers');
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goog.require('shaka.util.Mp4Parser');
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goog.require('shaka.util.Platform');
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goog.require('shaka.util.PublicPromise');
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goog.require('shaka.util.StreamUtils');
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goog.require('shaka.util.TsParser');
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goog.require('shaka.lcevc.Dec');
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/**
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* @summary
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* MediaSourceEngine wraps all operations on MediaSource and SourceBuffers.
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* All asynchronous operations return a Promise, and all operations are
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* internally synchronized and serialized as needed. Operations that can
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* be done in parallel will be done in parallel.
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*
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* @implements {shaka.util.IDestroyable}
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*/
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shaka.media.MediaSourceEngine = class {
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/**
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* @param {HTMLMediaElement} video The video element, whose source is tied to
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* MediaSource during the lifetime of the MediaSourceEngine.
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* @param {!shaka.extern.TextDisplayer} textDisplayer
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* The text displayer that will be used with the text engine.
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* MediaSourceEngine takes ownership of the displayer. When
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* MediaSourceEngine is destroyed, it will destroy the displayer.
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* @param {!shaka.media.MediaSourceEngine.PlayerInterface} playerInterface
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* Interface for common player methods.
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* @param {?shaka.lcevc.Dec} [lcevcDec] Optional - LCEVC Decoder Object
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*/
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constructor(video, textDisplayer, playerInterface, lcevcDec) {
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/** @private {HTMLMediaElement} */
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this.video_ = video;
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/** @private {?shaka.media.MediaSourceEngine.PlayerInterface} */
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this.playerInterface_ = playerInterface;
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/** @private {?shaka.extern.MediaSourceConfiguration} */
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this.config_ = null;
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/** @private {shaka.extern.TextDisplayer} */
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this.textDisplayer_ = textDisplayer;
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/** @private {!Object.<shaka.util.ManifestParserUtils.ContentType,
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SourceBuffer>} */
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this.sourceBuffers_ = {};
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/** @private {!Object.<shaka.util.ManifestParserUtils.ContentType,
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string>} */
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this.sourceBufferTypes_ = {};
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/** @private {!Object.<shaka.util.ManifestParserUtils.ContentType,
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boolean>} */
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this.expectedEncryption_ = {};
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/** @private {shaka.text.TextEngine} */
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this.textEngine_ = null;
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/** @private {boolean} */
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this.segmentRelativeVttTiming_ = false;
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/** @private {?shaka.lcevc.Dec} */
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this.lcevcDec_ = lcevcDec || null;
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/**
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* @private {!Object.<string,
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* !Array.<shaka.media.MediaSourceEngine.Operation>>}
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*/
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this.queues_ = {};
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/** @private {shaka.util.EventManager} */
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this.eventManager_ = new shaka.util.EventManager();
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/** @private {!Object.<string, !shaka.extern.Transmuxer>} */
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this.transmuxers_ = {};
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/** @private {?shaka.media.IClosedCaptionParser} */
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this.captionParser_ = null;
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/** @private {!shaka.util.PublicPromise} */
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this.mediaSourceOpen_ = new shaka.util.PublicPromise();
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/** @private {string} */
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this.url_ = '';
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/** @private {boolean} */
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this.playbackHasBegun_ = false;
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/** @private {boolean} */
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this.streamingAllowed_ = true;
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/** @private {boolean} */
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this.usingRemotePlayback_ = false;
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/** @private {HTMLSourceElement} */
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this.source_ = null;
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/**
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* Fallback source element with direct media URI, used for casting
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* purposes.
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* @private {HTMLSourceElement}
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*/
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this.secondarySource_ = null;
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/** @private {MediaSource} */
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this.mediaSource_ = this.createMediaSource(this.mediaSourceOpen_);
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/** @private {boolean} */
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this.reloadingMediaSource_ = false;
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/** @type {!shaka.util.Destroyer} */
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this.destroyer_ = new shaka.util.Destroyer(() => this.doDestroy_());
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/** @private {boolean} */
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this.sequenceMode_ = false;
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/** @private {string} */
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this.manifestType_ = shaka.media.ManifestParser.UNKNOWN;
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/** @private {boolean} */
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this.ignoreManifestTimestampsInSegmentsMode_ = false;
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/** @private {boolean} */
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this.attemptTimestampOffsetCalculation_ = false;
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/** @private {!shaka.util.PublicPromise.<number>} */
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this.textSequenceModeOffset_ = new shaka.util.PublicPromise();
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/** @private {boolean} */
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this.needSplitMuxedContent_ = false;
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/** @private {?number} */
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this.lastDuration_ = null;
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/** @private {!Object.<shaka.util.ManifestParserUtils.ContentType,
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!shaka.util.TsParser>} */
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this.tsParsers_ = {};
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/** @private {?number} */
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this.firstVideoTimestamp_ = null;
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/** @private {?number} */
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this.firstVideoReferenceStartTime_ = null;
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/** @private {?number} */
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this.firstAudioTimestamp_ = null;
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/** @private {?number} */
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this.firstAudioReferenceStartTime_ = null;
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/** @private {!shaka.util.PublicPromise.<number>} */
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this.audioCompensation_ = new shaka.util.PublicPromise();
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if (this.video_.remote) {
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this.usingRemotePlayback_ = this.video_.remote.state != 'disconnected';
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this.eventManager_.listen(this.video_.remote, 'connect', () => {
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this.usingRemotePlayback_ = this.video_.remote.state != 'disconnected';
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});
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this.eventManager_.listen(this.video_.remote, 'connecting', () => {
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this.usingRemotePlayback_ = this.video_.remote.state != 'disconnected';
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});
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this.eventManager_.listen(this.video_.remote, 'disconnect', () => {
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this.usingRemotePlayback_ = this.video_.remote.state != 'disconnected';
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});
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}
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}
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/**
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* Create a MediaSource object, attach it to the video element, and return it.
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* Resolves the given promise when the MediaSource is ready.
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*
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* Replaced by unit tests.
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*
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* @param {!shaka.util.PublicPromise} p
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* @return {!MediaSource}
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*/
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createMediaSource(p) {
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this.streamingAllowed_ = true;
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/** @type {!MediaSource} */
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let mediaSource;
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if (window.ManagedMediaSource) {
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if (!this.secondarySource_) {
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this.video_.disableRemotePlayback = true;
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}
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mediaSource = new ManagedMediaSource();
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this.eventManager_.listen(
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mediaSource, 'startstreaming', () => {
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shaka.log.info('MMS startstreaming');
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this.streamingAllowed_ = true;
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});
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this.eventManager_.listen(
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mediaSource, 'endstreaming', () => {
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shaka.log.info('MMS endstreaming');
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this.streamingAllowed_ = false;
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});
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} else {
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mediaSource = new MediaSource();
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}
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// Set up MediaSource on the video element.
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this.eventManager_.listenOnce(
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mediaSource, 'sourceopen', () => this.onSourceOpen_(p));
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// Correctly set when playback has begun.
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this.eventManager_.listenOnce(this.video_, 'playing', () => {
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this.playbackHasBegun_ = true;
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});
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// Store the object URL for releasing it later.
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this.url_ = shaka.media.MediaSourceEngine.createObjectURL(mediaSource);
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this.video_.removeAttribute('src');
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if (this.source_) {
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this.video_.removeChild(this.source_);
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}
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if (this.secondarySource_) {
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this.video_.removeChild(this.secondarySource_);
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}
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this.source_ = shaka.util.Dom.createSourceElement(this.url_);
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this.video_.appendChild(this.source_);
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if (this.secondarySource_) {
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this.video_.appendChild(this.secondarySource_);
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}
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this.video_.load();
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return mediaSource;
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}
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/**
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* @param {string} uri
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* @param {string} mimeType
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*/
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addSecondarySource(uri, mimeType) {
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if (!this.video_ || !(this.mediaSource_ instanceof ManagedMediaSource)) {
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shaka.log.warning(
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'Secondary source is used only with ManagedMediaSource');
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return;
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}
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if (this.secondarySource_) {
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this.video_.removeChild(this.secondarySource_);
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}
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this.secondarySource_ = shaka.util.Dom.createSourceElement(uri, mimeType);
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this.video_.appendChild(this.secondarySource_);
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this.video_.disableRemotePlayback = false;
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}
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/**
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* @param {shaka.util.PublicPromise} p
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* @private
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*/
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onSourceOpen_(p) {
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goog.asserts.assert(this.url_, 'Must have object URL');
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// Release the object URL that was previously created, to prevent memory
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// leak.
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// createObjectURL creates a strong reference to the MediaSource object
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// inside the browser. Setting the src of the video then creates another
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// reference within the video element. revokeObjectURL will remove the
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// strong reference to the MediaSource object, and allow it to be
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// garbage-collected later.
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URL.revokeObjectURL(this.url_);
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p.resolve();
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}
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/**
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* Checks if a certain type is supported.
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*
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* @param {shaka.extern.Stream} stream
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* @param {shaka.util.ManifestParserUtils.ContentType} contentType
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* @return {!Promise.<boolean>}
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*/
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static async isStreamSupported(stream, contentType) {
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if (stream.createSegmentIndex) {
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await stream.createSegmentIndex();
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}
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if (!stream.segmentIndex) {
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return false;
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}
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if (stream.segmentIndex.isEmpty()) {
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return true;
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}
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const MimeUtils = shaka.util.MimeUtils;
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const TransmuxerEngine = shaka.transmuxer.TransmuxerEngine;
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const ContentType = shaka.util.ManifestParserUtils.ContentType;
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const StreamUtils = shaka.util.StreamUtils;
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const seenCombos = new Set();
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// Check each combination of mimeType and codecs within the segment index.
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// Unfortunately we cannot use fullMimeTypes, as we ALSO need to check the
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// getFullTypeWithAllCodecs (for the sake of the transmuxer) and we have no
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// way of going from a full mimeType to a full mimeType with all codecs.
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// As this function is only called in debug mode, a little inefficiency is
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// acceptable.
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for (const ref of stream.segmentIndex) {
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const mimeType = ref.mimeType || stream.mimeType || '';
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let codecs = ref.codecs || stream.codecs || '';
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// Don't check the same combination of mimetype + codecs twice.
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const combo = mimeType + ':' + codecs;
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if (seenCombos.has(combo)) {
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continue;
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}
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seenCombos.add(combo);
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if (contentType == ContentType.TEXT) {
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const fullMimeType = MimeUtils.getFullType(mimeType, codecs);
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if (!shaka.text.TextEngine.isTypeSupported(fullMimeType)) {
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return false;
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}
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} else {
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if (contentType == ContentType.VIDEO) {
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codecs = StreamUtils.getCorrectVideoCodecs(codecs);
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} else if (contentType == ContentType.AUDIO) {
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codecs = StreamUtils.getCorrectAudioCodecs(codecs, mimeType);
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}
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const extendedMimeType = MimeUtils.getExtendedType(
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stream, mimeType, codecs);
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const fullMimeType = MimeUtils.getFullTypeWithAllCodecs(
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mimeType, codecs);
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if (!shaka.media.Capabilities.isTypeSupported(extendedMimeType) &&
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!TransmuxerEngine.isSupported(fullMimeType, stream.type)) {
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return false;
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}
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}
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}
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return true;
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}
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/**
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* Returns a map of MediaSource support for well-known types.
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*
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* @return {!Object.<string, boolean>}
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*/
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static probeSupport() {
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const testMimeTypes = [
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// MP4 types
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'video/mp4; codecs="avc1.42E01E"',
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'video/mp4; codecs="avc3.42E01E"',
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'video/mp4; codecs="hev1.1.6.L93.90"',
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'video/mp4; codecs="hvc1.1.6.L93.90"',
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'video/mp4; codecs="hev1.2.4.L153.B0"; eotf="smpte2084"', // HDR HEVC
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'video/mp4; codecs="hvc1.2.4.L153.B0"; eotf="smpte2084"', // HDR HEVC
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'video/mp4; codecs="vp9"',
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'video/mp4; codecs="vp09.00.10.08"',
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'video/mp4; codecs="av01.0.01M.08"',
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'video/mp4; codecs="dvh1.05.01"',
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'video/mp4; codecs="dvh1.20.01"',
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'audio/mp4; codecs="mp4a.40.2"',
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'audio/mp4; codecs="ac-3"',
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'audio/mp4; codecs="ec-3"',
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'audio/mp4; codecs="ac-4.02.01.01"',
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'audio/mp4; codecs="opus"',
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'audio/mp4; codecs="flac"',
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'audio/mp4; codecs="dtsc"', // DTS Digital Surround
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'audio/mp4; codecs="dtse"', // DTS Express
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'audio/mp4; codecs="dtsx"', // DTS:X
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// WebM types
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'video/webm; codecs="vp8"',
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'video/webm; codecs="vp9"',
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'video/webm; codecs="vp09.00.10.08"',
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'audio/webm; codecs="vorbis"',
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'audio/webm; codecs="opus"',
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// MPEG2 TS types (video/ is also used for audio: https://bit.ly/TsMse)
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'video/mp2t; codecs="avc1.42E01E"',
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'video/mp2t; codecs="avc3.42E01E"',
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'video/mp2t; codecs="hvc1.1.6.L93.90"',
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'video/mp2t; codecs="mp4a.40.2"',
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'video/mp2t; codecs="ac-3"',
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'video/mp2t; codecs="ec-3"',
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// WebVTT types
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'text/vtt',
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'application/mp4; codecs="wvtt"',
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// TTML types
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'application/ttml+xml',
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'application/mp4; codecs="stpp"',
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// Containerless types
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...shaka.util.MimeUtils.RAW_FORMATS,
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];
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const support = {};
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for (const type of testMimeTypes) {
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if (shaka.text.TextEngine.isTypeSupported(type)) {
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support[type] = true;
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} else if (shaka.util.Platform.supportsMediaSource()) {
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support[type] = shaka.media.Capabilities.isTypeSupported(type) ||
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shaka.transmuxer.TransmuxerEngine.isSupported(type);
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} else {
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support[type] = shaka.util.Platform.supportsMediaType(type);
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}
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const basicType = type.split(';')[0];
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support[basicType] = support[basicType] || support[type];
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}
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return support;
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}
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/** @override */
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destroy() {
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return this.destroyer_.destroy();
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}
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/** @private */
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async doDestroy_() {
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const Functional = shaka.util.Functional;
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const cleanup = [];
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for (const contentType in this.queues_) {
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// Make a local copy of the queue and the first item.
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const q = this.queues_[contentType];
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const inProgress = q[0];
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// Drop everything else out of the original queue.
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this.queues_[contentType] = q.slice(0, 1);
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// We will wait for this item to complete/fail.
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if (inProgress) {
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cleanup.push(inProgress.p.catch(Functional.noop));
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}
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// The rest will be rejected silently if possible.
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for (const item of q.slice(1)) {
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item.p.reject(shaka.util.Destroyer.destroyedError());
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}
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}
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if (this.textEngine_) {
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cleanup.push(this.textEngine_.destroy());
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}
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for (const contentType in this.transmuxers_) {
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cleanup.push(this.transmuxers_[contentType].destroy());
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}
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await Promise.all(cleanup);
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if (this.eventManager_) {
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this.eventManager_.release();
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this.eventManager_ = null;
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}
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if (this.video_ && this.secondarySource_) {
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this.video_.removeChild(this.secondarySource_);
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}
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if (this.video_ && this.source_) {
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// "unload" the video element.
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this.video_.removeChild(this.source_);
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this.video_.load();
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this.video_.disableRemotePlayback = false;
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}
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this.video_ = null;
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this.source_ = null;
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this.secondarySource_ = null;
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this.config_ = null;
|
||
this.mediaSource_ = null;
|
||
this.textEngine_ = null;
|
||
this.textDisplayer_ = null;
|
||
this.sourceBuffers_ = {};
|
||
this.transmuxers_ = {};
|
||
this.captionParser_ = null;
|
||
if (goog.DEBUG) {
|
||
for (const contentType in this.queues_) {
|
||
goog.asserts.assert(
|
||
this.queues_[contentType].length == 0,
|
||
contentType + ' queue should be empty after destroy!');
|
||
}
|
||
}
|
||
this.queues_ = {};
|
||
|
||
// This object is owned by Player
|
||
this.lcevcDec_ = null;
|
||
|
||
this.tsParsers_ = {};
|
||
this.playerInterface_ = null;
|
||
}
|
||
|
||
/**
|
||
* @return {!Promise} Resolved when MediaSource is open and attached to the
|
||
* media element. This process is actually initiated by the constructor.
|
||
*/
|
||
open() {
|
||
return this.mediaSourceOpen_;
|
||
}
|
||
|
||
/**
|
||
* Initialize MediaSourceEngine.
|
||
*
|
||
* Note that it is not valid to call this multiple times, except to add or
|
||
* reinitialize text streams.
|
||
*
|
||
* @param {!Map.<shaka.util.ManifestParserUtils.ContentType,
|
||
* shaka.extern.Stream>} streamsByType
|
||
* A map of content types to streams. All streams must be supported
|
||
* according to MediaSourceEngine.isStreamSupported.
|
||
* @param {boolean=} sequenceMode
|
||
* If true, the media segments are appended to the SourceBuffer in strict
|
||
* sequence.
|
||
* @param {string=} manifestType
|
||
* Indicates the type of the manifest.
|
||
* @param {boolean=} ignoreManifestTimestampsInSegmentsMode
|
||
* If true, don't adjust the timestamp offset to account for manifest
|
||
* segment durations being out of sync with segment durations. In other
|
||
* words, assume that there are no gaps in the segments when appending
|
||
* to the SourceBuffer, even if the manifest and segment times disagree.
|
||
* Indicates if the manifest has text streams.
|
||
*
|
||
* @return {!Promise}
|
||
*/
|
||
async init(streamsByType, sequenceMode=false,
|
||
manifestType=shaka.media.ManifestParser.UNKNOWN,
|
||
ignoreManifestTimestampsInSegmentsMode=false) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
|
||
await this.mediaSourceOpen_;
|
||
|
||
this.sequenceMode_ = sequenceMode;
|
||
this.manifestType_ = manifestType;
|
||
this.ignoreManifestTimestampsInSegmentsMode_ =
|
||
ignoreManifestTimestampsInSegmentsMode;
|
||
|
||
this.attemptTimestampOffsetCalculation_ = !this.sequenceMode_ &&
|
||
this.manifestType_ == shaka.media.ManifestParser.HLS &&
|
||
!this.ignoreManifestTimestampsInSegmentsMode_;
|
||
|
||
this.tsParsers_ = {};
|
||
this.firstVideoTimestamp_ = null;
|
||
this.firstVideoReferenceStartTime_ = null;
|
||
this.firstAudioTimestamp_ = null;
|
||
this.firstAudioReferenceStartTime_ = null;
|
||
this.audioCompensation_ = new shaka.util.PublicPromise();
|
||
|
||
for (const contentType of streamsByType.keys()) {
|
||
const stream = streamsByType.get(contentType);
|
||
// eslint-disable-next-line no-await-in-loop
|
||
await this.initSourceBuffer_(contentType, stream, stream.codecs);
|
||
if (this.needSplitMuxedContent_) {
|
||
this.queues_[ContentType.AUDIO] = [];
|
||
this.queues_[ContentType.VIDEO] = [];
|
||
} else {
|
||
this.queues_[contentType] = [];
|
||
}
|
||
}
|
||
const audio = streamsByType.get(ContentType.AUDIO);
|
||
if (audio && audio.isAudioMuxedInVideo) {
|
||
this.needSplitMuxedContent_ = true;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Initialize a specific SourceBuffer.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {shaka.extern.Stream} stream
|
||
* @param {string} codecs
|
||
* @return {!Promise}
|
||
* @private
|
||
*/
|
||
async initSourceBuffer_(contentType, stream, codecs) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
|
||
goog.asserts.assert(
|
||
await shaka.media.MediaSourceEngine.isStreamSupported(
|
||
stream, contentType),
|
||
'Type negotiation should happen before MediaSourceEngine.init!');
|
||
|
||
let mimeType = shaka.util.MimeUtils.getFullType(
|
||
stream.mimeType, codecs);
|
||
if (contentType == ContentType.TEXT) {
|
||
this.reinitText(mimeType, this.sequenceMode_, stream.external);
|
||
} else {
|
||
let needTransmux = this.config_.forceTransmux;
|
||
if (!shaka.media.Capabilities.isTypeSupported(mimeType) ||
|
||
(!this.sequenceMode_ &&
|
||
shaka.util.MimeUtils.RAW_FORMATS.includes(mimeType))) {
|
||
needTransmux = true;
|
||
}
|
||
const mimeTypeWithAllCodecs =
|
||
shaka.util.MimeUtils.getFullTypeWithAllCodecs(
|
||
stream.mimeType, codecs);
|
||
if (needTransmux) {
|
||
const audioCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
|
||
ContentType.AUDIO, (codecs || '').split(','));
|
||
const videoCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
|
||
ContentType.VIDEO, (codecs || '').split(','));
|
||
if (audioCodec && videoCodec) {
|
||
this.needSplitMuxedContent_ = true;
|
||
await this.initSourceBuffer_(ContentType.AUDIO, stream, audioCodec);
|
||
await this.initSourceBuffer_(ContentType.VIDEO, stream, videoCodec);
|
||
return;
|
||
}
|
||
const transmuxerPlugin = shaka.transmuxer.TransmuxerEngine
|
||
.findTransmuxer(mimeTypeWithAllCodecs);
|
||
if (transmuxerPlugin) {
|
||
const transmuxer = transmuxerPlugin();
|
||
this.transmuxers_[contentType] = transmuxer;
|
||
mimeType =
|
||
transmuxer.convertCodecs(contentType, mimeTypeWithAllCodecs);
|
||
}
|
||
}
|
||
const type = this.addExtraFeaturesToMimeType_(mimeType);
|
||
|
||
this.destroyer_.ensureNotDestroyed();
|
||
|
||
let sourceBuffer;
|
||
|
||
try {
|
||
sourceBuffer = this.mediaSource_.addSourceBuffer(type);
|
||
} catch (exception) {
|
||
throw new shaka.util.Error(
|
||
shaka.util.Error.Severity.CRITICAL,
|
||
shaka.util.Error.Category.MEDIA,
|
||
shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
|
||
exception,
|
||
'The mediaSource_ status was ' + this.mediaSource_.readyState +
|
||
' expected \'open\'',
|
||
null);
|
||
}
|
||
|
||
if (this.sequenceMode_) {
|
||
sourceBuffer.mode =
|
||
shaka.media.MediaSourceEngine.SourceBufferMode_.SEQUENCE;
|
||
}
|
||
|
||
this.eventManager_.listen(
|
||
sourceBuffer, 'error',
|
||
() => this.onError_(contentType));
|
||
this.eventManager_.listen(
|
||
sourceBuffer, 'updateend',
|
||
() => this.onUpdateEnd_(contentType));
|
||
this.sourceBuffers_[contentType] = sourceBuffer;
|
||
this.sourceBufferTypes_[contentType] = mimeType;
|
||
this.expectedEncryption_[contentType] = !!stream.drmInfos.length;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Called by the Player to provide an updated configuration any time it
|
||
* changes. Must be called at least once before init().
|
||
*
|
||
* @param {shaka.extern.MediaSourceConfiguration} config
|
||
*/
|
||
configure(config) {
|
||
this.config_ = config;
|
||
if (this.textEngine_) {
|
||
this.textEngine_.setModifyCueCallback(config.modifyCueCallback);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Indicate if the streaming is allowed by MediaSourceEngine.
|
||
* If we using MediaSource we allways returns true.
|
||
*
|
||
* @return {boolean}
|
||
*/
|
||
isStreamingAllowed() {
|
||
return this.streamingAllowed_ && !this.usingRemotePlayback_;
|
||
}
|
||
|
||
/**
|
||
* Reinitialize the TextEngine for a new text type.
|
||
* @param {string} mimeType
|
||
* @param {boolean} sequenceMode
|
||
* @param {boolean} external
|
||
*/
|
||
reinitText(mimeType, sequenceMode, external) {
|
||
if (!this.textEngine_) {
|
||
this.textEngine_ = new shaka.text.TextEngine(this.textDisplayer_);
|
||
if (this.textEngine_) {
|
||
this.textEngine_.setModifyCueCallback(this.config_.modifyCueCallback);
|
||
}
|
||
}
|
||
this.textEngine_.initParser(mimeType, sequenceMode,
|
||
external || this.segmentRelativeVttTiming_, this.manifestType_);
|
||
}
|
||
|
||
/**
|
||
* @return {boolean} True if the MediaSource is in an "ended" state, or if the
|
||
* object has been destroyed.
|
||
*/
|
||
ended() {
|
||
if (this.reloadingMediaSource_) {
|
||
return false;
|
||
}
|
||
return this.mediaSource_ ? this.mediaSource_.readyState == 'ended' : true;
|
||
}
|
||
|
||
/**
|
||
* Gets the first timestamp in buffer for the given content type.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @return {?number} The timestamp in seconds, or null if nothing is buffered.
|
||
*/
|
||
bufferStart(contentType) {
|
||
if (!Object.keys(this.sourceBuffers_).length) {
|
||
return null;
|
||
}
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
return this.textEngine_.bufferStart();
|
||
}
|
||
return shaka.media.TimeRangesUtils.bufferStart(
|
||
this.getBuffered_(contentType));
|
||
}
|
||
|
||
/**
|
||
* Gets the last timestamp in buffer for the given content type.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @return {?number} The timestamp in seconds, or null if nothing is buffered.
|
||
*/
|
||
bufferEnd(contentType) {
|
||
if (!Object.keys(this.sourceBuffers_).length) {
|
||
return null;
|
||
}
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
return this.textEngine_.bufferEnd();
|
||
}
|
||
return shaka.media.TimeRangesUtils.bufferEnd(
|
||
this.getBuffered_(contentType));
|
||
}
|
||
|
||
/**
|
||
* Determines if the given time is inside the buffered range of the given
|
||
* content type.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} time Playhead time
|
||
* @return {boolean}
|
||
*/
|
||
isBuffered(contentType, time) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
return this.textEngine_.isBuffered(time);
|
||
} else {
|
||
const buffered = this.getBuffered_(contentType);
|
||
return shaka.media.TimeRangesUtils.isBuffered(buffered, time);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Computes how far ahead of the given timestamp is buffered for the given
|
||
* content type.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} time
|
||
* @return {number} The amount of time buffered ahead in seconds.
|
||
*/
|
||
bufferedAheadOf(contentType, time) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
return this.textEngine_.bufferedAheadOf(time);
|
||
} else {
|
||
const buffered = this.getBuffered_(contentType);
|
||
return shaka.media.TimeRangesUtils.bufferedAheadOf(buffered, time);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Returns info about what is currently buffered.
|
||
* @return {shaka.extern.BufferedInfo}
|
||
*/
|
||
getBufferedInfo() {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
const TimeRangesUtils = shaka.media.TimeRangesUtils;
|
||
|
||
const info = {
|
||
total: this.reloadingMediaSource_ ? [] :
|
||
TimeRangesUtils.getBufferedInfo(this.video_.buffered),
|
||
audio:
|
||
TimeRangesUtils.getBufferedInfo(this.getBuffered_(ContentType.AUDIO)),
|
||
video:
|
||
TimeRangesUtils.getBufferedInfo(this.getBuffered_(ContentType.VIDEO)),
|
||
text: [],
|
||
};
|
||
|
||
if (this.textEngine_) {
|
||
const start = this.textEngine_.bufferStart();
|
||
const end = this.textEngine_.bufferEnd();
|
||
|
||
if (start != null && end != null) {
|
||
info.text.push({start: start, end: end});
|
||
}
|
||
}
|
||
return info;
|
||
}
|
||
|
||
/**
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @return {TimeRanges} The buffered ranges for the given content type, or
|
||
* null if the buffered ranges could not be obtained.
|
||
* @private
|
||
*/
|
||
getBuffered_(contentType) {
|
||
if (this.reloadingMediaSource_ || this.usingRemotePlayback_) {
|
||
return null;
|
||
}
|
||
try {
|
||
return this.sourceBuffers_[contentType].buffered;
|
||
} catch (exception) {
|
||
if (contentType in this.sourceBuffers_) {
|
||
// Note: previous MediaSource errors may cause access to |buffered| to
|
||
// throw.
|
||
shaka.log.error('failed to get buffered range for ' + contentType,
|
||
exception);
|
||
}
|
||
return null;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Create a new closed caption parser. This will ONLY be replaced by tests as
|
||
* a way to inject fake closed caption parser instances.
|
||
*
|
||
* @param {string} mimeType
|
||
* @return {!shaka.media.IClosedCaptionParser}
|
||
*/
|
||
getCaptionParser(mimeType) {
|
||
return new shaka.media.ClosedCaptionParser(mimeType);
|
||
}
|
||
|
||
/**
|
||
* This method is only public for testing.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {!BufferSource} data
|
||
* @param {!shaka.media.SegmentReference} reference The segment reference
|
||
* we are appending
|
||
* @param {shaka.extern.Stream} stream
|
||
* @param {!string} mimeType
|
||
* @return {{timestamp: ?number, metadata: !Array.<shaka.extern.ID3Metadata>}}
|
||
*/
|
||
getTimestampAndDispatchMetadata(contentType, data, reference, stream,
|
||
mimeType) {
|
||
let timestamp = null;
|
||
let metadata = [];
|
||
|
||
const uint8ArrayData = shaka.util.BufferUtils.toUint8(data);
|
||
if (shaka.util.MimeUtils.RAW_FORMATS.includes(mimeType)) {
|
||
const frames = shaka.util.Id3Utils.getID3Frames(uint8ArrayData);
|
||
if (frames.length && reference) {
|
||
const metadataTimestamp = frames.find((frame) => {
|
||
return frame.description ===
|
||
'com.apple.streaming.transportStreamTimestamp';
|
||
});
|
||
if (metadataTimestamp && metadataTimestamp.data) {
|
||
timestamp = Math.round(metadataTimestamp.data) / 1000;
|
||
}
|
||
/** @private {shaka.extern.ID3Metadata} */
|
||
const id3Metadata = {
|
||
cueTime: reference.startTime,
|
||
data: uint8ArrayData,
|
||
frames: frames,
|
||
dts: reference.startTime,
|
||
pts: reference.startTime,
|
||
};
|
||
this.playerInterface_.onMetadata(
|
||
[id3Metadata], /* offset= */ 0, reference.endTime);
|
||
}
|
||
} else if (mimeType.includes('/mp4') &&
|
||
reference &&
|
||
reference.initSegmentReference &&
|
||
reference.initSegmentReference.timescale) {
|
||
const timescale = reference.initSegmentReference.timescale;
|
||
if (!isNaN(timescale)) {
|
||
const hasEmsg = ((stream.emsgSchemeIdUris != null &&
|
||
stream.emsgSchemeIdUris.length > 0) ||
|
||
this.config_.dispatchAllEmsgBoxes);
|
||
const Mp4Parser = shaka.util.Mp4Parser;
|
||
let startTime = 0;
|
||
let parsedMedia = false;
|
||
const parser = new Mp4Parser();
|
||
if (hasEmsg) {
|
||
parser.fullBox('emsg', (box) =>
|
||
this.parseEMSG_(reference, stream.emsgSchemeIdUris, box));
|
||
}
|
||
parser.fullBox('prft', (box) => this.parsePrft_(timescale, box))
|
||
.box('moof', Mp4Parser.children)
|
||
.box('traf', Mp4Parser.children)
|
||
.fullBox('tfdt', (box) => {
|
||
goog.asserts.assert(
|
||
box.version == 0 || box.version == 1,
|
||
'TFDT version can only be 0 or 1');
|
||
const parsed = shaka.util.Mp4BoxParsers.parseTFDTInaccurate(
|
||
box.reader, box.version);
|
||
startTime = parsed.baseMediaDecodeTime / timescale;
|
||
parsedMedia = true;
|
||
box.parser.stop();
|
||
}).parse(data, /* partialOkay= */ true);
|
||
if (parsedMedia && reference.timestampOffset == 0) {
|
||
timestamp = startTime;
|
||
}
|
||
}
|
||
} else if (!mimeType.includes('/mp4') && !mimeType.includes('/webm') &&
|
||
shaka.util.TsParser.probe(uint8ArrayData)) {
|
||
if (!this.tsParsers_[contentType]) {
|
||
this.tsParsers_[contentType] = new shaka.util.TsParser();
|
||
} else {
|
||
this.tsParsers_[contentType].clearData();
|
||
}
|
||
const tsParser = this.tsParsers_[contentType].parse(uint8ArrayData);
|
||
const startTime = tsParser.getStartTime(contentType);
|
||
if (startTime != null) {
|
||
timestamp = startTime;
|
||
}
|
||
metadata = tsParser.getMetadata();
|
||
}
|
||
return {timestamp, metadata};
|
||
}
|
||
|
||
|
||
/**
|
||
* Parse the EMSG box from a MP4 container.
|
||
*
|
||
* @param {!shaka.media.SegmentReference} reference
|
||
* @param {?Array.<string>} emsgSchemeIdUris Array of emsg
|
||
* scheme_id_uri for which emsg boxes should be parsed.
|
||
* @param {!shaka.extern.ParsedBox} box
|
||
* @private
|
||
* https://dashif-documents.azurewebsites.net/Events/master/event.html#emsg-format
|
||
* aligned(8) class DASHEventMessageBox
|
||
* extends FullBox(‘emsg’, version, flags = 0){
|
||
* if (version==0) {
|
||
* string scheme_id_uri;
|
||
* string value;
|
||
* unsigned int(32) timescale;
|
||
* unsigned int(32) presentation_time_delta;
|
||
* unsigned int(32) event_duration;
|
||
* unsigned int(32) id;
|
||
* } else if (version==1) {
|
||
* unsigned int(32) timescale;
|
||
* unsigned int(64) presentation_time;
|
||
* unsigned int(32) event_duration;
|
||
* unsigned int(32) id;
|
||
* string scheme_id_uri;
|
||
* string value;
|
||
* }
|
||
* unsigned int(8) message_data[];
|
||
*/
|
||
parseEMSG_(reference, emsgSchemeIdUris, box) {
|
||
let timescale;
|
||
let id;
|
||
let eventDuration;
|
||
let schemeId;
|
||
let startTime;
|
||
let presentationTimeDelta;
|
||
let value;
|
||
|
||
if (box.version === 0) {
|
||
schemeId = box.reader.readTerminatedString();
|
||
value = box.reader.readTerminatedString();
|
||
timescale = box.reader.readUint32();
|
||
presentationTimeDelta = box.reader.readUint32();
|
||
eventDuration = box.reader.readUint32();
|
||
id = box.reader.readUint32();
|
||
startTime = reference.startTime + (presentationTimeDelta / timescale);
|
||
} else {
|
||
timescale = box.reader.readUint32();
|
||
const pts = box.reader.readUint64();
|
||
startTime = (pts / timescale) + reference.timestampOffset;
|
||
presentationTimeDelta = startTime - reference.startTime;
|
||
eventDuration = box.reader.readUint32();
|
||
id = box.reader.readUint32();
|
||
schemeId = box.reader.readTerminatedString();
|
||
value = box.reader.readTerminatedString();
|
||
}
|
||
const messageData = box.reader.readBytes(
|
||
box.reader.getLength() - box.reader.getPosition());
|
||
|
||
// See DASH sec. 5.10.3.3.1
|
||
// If a DASH client detects an event message box with a scheme that is not
|
||
// defined in MPD, the client is expected to ignore it.
|
||
if ((emsgSchemeIdUris && emsgSchemeIdUris.includes(schemeId)) ||
|
||
this.config_.dispatchAllEmsgBoxes) {
|
||
// See DASH sec. 5.10.4.1
|
||
// A special scheme in DASH used to signal manifest updates.
|
||
if (schemeId == 'urn:mpeg:dash:event:2012') {
|
||
this.playerInterface_.onManifestUpdate();
|
||
} else {
|
||
// All other schemes are dispatched as a general 'emsg' event.
|
||
const endTime = startTime + (eventDuration / timescale);
|
||
/** @type {shaka.extern.EmsgInfo} */
|
||
const emsg = {
|
||
startTime: startTime,
|
||
endTime: endTime,
|
||
schemeIdUri: schemeId,
|
||
value: value,
|
||
timescale: timescale,
|
||
presentationTimeDelta: presentationTimeDelta,
|
||
eventDuration: eventDuration,
|
||
id: id,
|
||
messageData: messageData,
|
||
};
|
||
|
||
// Dispatch an event to notify the application about the emsg box.
|
||
const eventName = shaka.util.FakeEvent.EventName.Emsg;
|
||
const data = (new Map()).set('detail', emsg);
|
||
const event = new shaka.util.FakeEvent(eventName, data);
|
||
// A user can call preventDefault() on a cancelable event.
|
||
event.cancelable = true;
|
||
|
||
this.playerInterface_.onEvent(event);
|
||
|
||
if (event.defaultPrevented) {
|
||
// If the caller uses preventDefault() on the 'emsg' event, don't
|
||
// process any further, and don't generate an ID3 'metadata' event
|
||
// for the same data.
|
||
return;
|
||
}
|
||
|
||
// Additionally, ID3 events generate a 'metadata' event. This is a
|
||
// pre-parsed version of the metadata blob already dispatched in the
|
||
// 'emsg' event.
|
||
if (schemeId == 'https://aomedia.org/emsg/ID3' ||
|
||
schemeId == 'https://developer.apple.com/streaming/emsg-id3') {
|
||
// See https://aomediacodec.github.io/id3-emsg/
|
||
const frames = shaka.util.Id3Utils.getID3Frames(messageData);
|
||
if (frames.length) {
|
||
/** @private {shaka.extern.ID3Metadata} */
|
||
const metadata = {
|
||
cueTime: startTime,
|
||
data: messageData,
|
||
frames: frames,
|
||
dts: startTime,
|
||
pts: startTime,
|
||
};
|
||
this.playerInterface_.onMetadata(
|
||
[metadata], /* offset= */ 0, endTime);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Parse PRFT box.
|
||
* @param {number} timescale
|
||
* @param {!shaka.extern.ParsedBox} box
|
||
* @private
|
||
*/
|
||
parsePrft_(timescale, box) {
|
||
goog.asserts.assert(
|
||
box.version == 0 || box.version == 1,
|
||
'PRFT version can only be 0 or 1');
|
||
const parsed = shaka.util.Mp4BoxParsers.parsePRFTInaccurate(
|
||
box.reader, box.version);
|
||
|
||
const wallClockTime = this.convertNtp_(parsed.ntpTimestamp);
|
||
const programStartDate = new Date(wallClockTime -
|
||
(parsed.mediaTime / timescale) * 1000);
|
||
/** @type {shaka.extern.ProducerReferenceTime} */
|
||
const prftInfo = {
|
||
wallClockTime,
|
||
programStartDate,
|
||
};
|
||
|
||
const eventName = shaka.util.FakeEvent.EventName.Prft;
|
||
const data = (new Map()).set('detail', prftInfo);
|
||
const event = new shaka.util.FakeEvent(
|
||
eventName, data);
|
||
this.playerInterface_.onEvent(event);
|
||
}
|
||
|
||
|
||
/**
|
||
* Convert Ntp ntpTimeStamp to UTC Time
|
||
*
|
||
* @param {number} ntpTimeStamp
|
||
* @return {number} utcTime
|
||
* @private
|
||
*/
|
||
convertNtp_(ntpTimeStamp) {
|
||
const start = new Date(Date.UTC(1900, 0, 1, 0, 0, 0));
|
||
return new Date(start.getTime() + ntpTimeStamp).getTime();
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation to append data to the SourceBuffer.
|
||
* Start and end times are needed for TextEngine, but not for MediaSource.
|
||
* Start and end times may be null for initialization segments; if present
|
||
* they are relative to the presentation timeline.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {!BufferSource} data
|
||
* @param {?shaka.media.SegmentReference} reference The segment reference
|
||
* we are appending, or null for init segments
|
||
* @param {shaka.extern.Stream} stream
|
||
* @param {?boolean} hasClosedCaptions True if the buffer contains CEA closed
|
||
* captions
|
||
* @param {boolean=} seeked True if we just seeked
|
||
* @param {boolean=} adaptation True if we just automatically switched active
|
||
* variant(s).
|
||
* @param {boolean=} isChunkedData True if we add to the buffer from the
|
||
* partial read of the segment.
|
||
* @return {!Promise}
|
||
*/
|
||
async appendBuffer(
|
||
contentType, data, reference, stream, hasClosedCaptions, seeked = false,
|
||
adaptation = false, isChunkedData = false, fromSplit = false) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
|
||
if (contentType == ContentType.TEXT) {
|
||
if (this.manifestType_ == shaka.media.ManifestParser.HLS &&
|
||
reference.discontinuitySequence >= 0) {
|
||
// This won't be known until the first video segment is appended.
|
||
const offset = await this.textSequenceModeOffset_;
|
||
this.textEngine_.setTimestampOffset(offset);
|
||
}
|
||
await this.textEngine_.appendBuffer(
|
||
data,
|
||
reference ? reference.startTime : null,
|
||
reference ? reference.endTime : null,
|
||
reference ? reference.getUris()[0] : null);
|
||
return;
|
||
}
|
||
|
||
if (!fromSplit && this.needSplitMuxedContent_) {
|
||
await this.appendBuffer(ContentType.AUDIO, data, reference, stream,
|
||
hasClosedCaptions, seeked, adaptation, isChunkedData,
|
||
/* fromSplit= */ true);
|
||
await this.appendBuffer(ContentType.VIDEO, data, reference, stream,
|
||
hasClosedCaptions, seeked, adaptation, isChunkedData,
|
||
/* fromSplit= */ true);
|
||
return;
|
||
}
|
||
|
||
if (!this.sourceBuffers_[contentType]) {
|
||
shaka.log.warning('Attempted to restore a non-existent source buffer');
|
||
return;
|
||
}
|
||
|
||
let timestampOffset = this.sourceBuffers_[contentType].timestampOffset;
|
||
|
||
let mimeType = this.sourceBufferTypes_[contentType];
|
||
if (this.transmuxers_[contentType]) {
|
||
mimeType = this.transmuxers_[contentType].getOriginalMimeType();
|
||
}
|
||
if (reference) {
|
||
const {timestamp, metadata} = this.getTimestampAndDispatchMetadata(
|
||
contentType, data, reference, stream, mimeType);
|
||
if (timestamp != null) {
|
||
if (this.firstVideoTimestamp_ == null &&
|
||
contentType == ContentType.VIDEO) {
|
||
this.firstVideoTimestamp_ = timestamp;
|
||
this.firstVideoReferenceStartTime_ = reference.startTime;
|
||
if (this.firstAudioTimestamp_ != null) {
|
||
let compensation = 0;
|
||
// Only apply compensation if video and audio segment startTime
|
||
// match, to avoid introducing sync issues.
|
||
if (this.firstVideoReferenceStartTime_ ==
|
||
this.firstAudioReferenceStartTime_) {
|
||
compensation =
|
||
this.firstVideoTimestamp_ - this.firstAudioTimestamp_;
|
||
}
|
||
this.audioCompensation_.resolve(compensation);
|
||
}
|
||
}
|
||
if (this.firstAudioTimestamp_ == null &&
|
||
contentType == ContentType.AUDIO) {
|
||
this.firstAudioTimestamp_ = timestamp;
|
||
this.firstAudioReferenceStartTime_ = reference.startTime;
|
||
if (this.firstVideoTimestamp_ != null) {
|
||
let compensation = 0;
|
||
// Only apply compensation if video and audio segment startTime
|
||
// match, to avoid introducing sync issues.
|
||
if (this.firstVideoReferenceStartTime_ ==
|
||
this.firstAudioReferenceStartTime_) {
|
||
compensation =
|
||
this.firstVideoTimestamp_ - this.firstAudioTimestamp_;
|
||
}
|
||
this.audioCompensation_.resolve(compensation);
|
||
}
|
||
}
|
||
const calculatedTimestampOffset = reference.startTime - timestamp;
|
||
const timestampOffsetDifference =
|
||
Math.abs(timestampOffset - calculatedTimestampOffset);
|
||
if ((timestampOffsetDifference >= 0.001 || seeked || adaptation) &&
|
||
(!isChunkedData || calculatedTimestampOffset > 0 ||
|
||
!timestampOffset)) {
|
||
timestampOffset = calculatedTimestampOffset;
|
||
if (this.attemptTimestampOffsetCalculation_) {
|
||
this.enqueueOperation_(
|
||
contentType,
|
||
() => this.abort_(contentType),
|
||
null);
|
||
this.enqueueOperation_(
|
||
contentType,
|
||
() => this.setTimestampOffset_(contentType, timestampOffset),
|
||
null);
|
||
}
|
||
}
|
||
// Timestamps can only be reliably extracted from video, not audio.
|
||
// Packed audio formats do not have internal timestamps at all.
|
||
// Prefer video for this when available.
|
||
const isBestSourceBufferForTimestamps =
|
||
contentType == ContentType.VIDEO ||
|
||
!(ContentType.VIDEO in this.sourceBuffers_);
|
||
if (isBestSourceBufferForTimestamps) {
|
||
this.textSequenceModeOffset_.resolve(timestampOffset);
|
||
}
|
||
}
|
||
if (metadata.length) {
|
||
this.playerInterface_.onMetadata(metadata, timestampOffset,
|
||
reference ? reference.endTime : null);
|
||
}
|
||
}
|
||
if (hasClosedCaptions && contentType == ContentType.VIDEO) {
|
||
if (!this.textEngine_) {
|
||
this.reinitText(shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE,
|
||
this.sequenceMode_, /* external= */ false);
|
||
}
|
||
if (!this.captionParser_) {
|
||
const basicType = mimeType.split(';', 1)[0];
|
||
this.captionParser_ = this.getCaptionParser(basicType);
|
||
}
|
||
// If it is the init segment for closed captions, initialize the closed
|
||
// caption parser.
|
||
if (!reference) {
|
||
this.captionParser_.init(data, adaptation);
|
||
} else {
|
||
const closedCaptions = this.captionParser_.parseFrom(data);
|
||
if (closedCaptions.length) {
|
||
this.textEngine_.storeAndAppendClosedCaptions(
|
||
closedCaptions,
|
||
reference.startTime,
|
||
reference.endTime,
|
||
timestampOffset);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (this.transmuxers_[contentType]) {
|
||
data = await this.transmuxers_[contentType].transmux(
|
||
data, stream, reference, this.mediaSource_.duration, contentType);
|
||
}
|
||
|
||
data = this.workAroundBrokenPlatforms_(
|
||
data, reference ? reference.startTime : null, contentType,
|
||
reference ? reference.getUris()[0] : null);
|
||
|
||
if (reference && this.sequenceMode_ && contentType != ContentType.TEXT) {
|
||
// In sequence mode, for non-text streams, if we just cleared the buffer
|
||
// and are either performing an unbuffered seek or handling an automatic
|
||
// adaptation, we need to set a new timestampOffset on the sourceBuffer.
|
||
if (seeked || adaptation) {
|
||
let timestampOffset = reference.startTime;
|
||
// Audio and video may not be aligned, so we will compensate for audio
|
||
// if necessary.
|
||
if (this.manifestType_ == shaka.media.ManifestParser.HLS &&
|
||
!this.needSplitMuxedContent_ &&
|
||
contentType == ContentType.AUDIO &&
|
||
this.sourceBuffers_[ContentType.VIDEO]) {
|
||
const compensation = await this.audioCompensation_;
|
||
// Only apply compensation if the difference is greater than 100ms
|
||
if (Math.abs(compensation) > 0.1) {
|
||
timestampOffset -= compensation;
|
||
}
|
||
}
|
||
// The logic to call abort() before setting the timestampOffset is
|
||
// extended during unbuffered seeks or automatic adaptations; it is
|
||
// possible for the append state to be PARSING_MEDIA_SEGMENT from the
|
||
// previous SourceBuffer#appendBuffer() call.
|
||
this.enqueueOperation_(
|
||
contentType,
|
||
() => this.abort_(contentType),
|
||
null);
|
||
this.enqueueOperation_(
|
||
contentType,
|
||
() => this.setTimestampOffset_(contentType, timestampOffset),
|
||
null);
|
||
}
|
||
}
|
||
|
||
let bufferedBefore = null;
|
||
|
||
await this.enqueueOperation_(contentType, () => {
|
||
if (goog.DEBUG && reference && !reference.isPreload() && !isChunkedData) {
|
||
bufferedBefore = this.getBuffered_(contentType);
|
||
}
|
||
this.append_(contentType, data, timestampOffset);
|
||
}, reference ? reference.getUris()[0] : null);
|
||
|
||
if (goog.DEBUG && reference && !reference.isPreload() && !isChunkedData) {
|
||
const bufferedAfter = this.getBuffered_(contentType);
|
||
const newBuffered = shaka.media.TimeRangesUtils.computeAddedRange(
|
||
bufferedBefore, bufferedAfter);
|
||
if (newBuffered) {
|
||
const segmentDuration = reference.endTime - reference.startTime;
|
||
const timeAdded = newBuffered.end - newBuffered.start;
|
||
// Check end times instead of start times. We may be overwriting a
|
||
// buffer and only the end changes, and that would be fine.
|
||
// Also, exclude tiny segments. Sometimes alignment segments as small
|
||
// as 33ms are seen in Google DAI content. For such tiny segments,
|
||
// half a segment duration would be no issue.
|
||
const offset = Math.abs(newBuffered.end - reference.endTime);
|
||
if (segmentDuration > 0.100 && (offset > segmentDuration / 2 ||
|
||
Math.abs(segmentDuration - timeAdded) > 0.030)) {
|
||
shaka.log.error('Possible encoding problem detected!',
|
||
'Unexpected buffered range for reference', reference,
|
||
'from URIs', reference.getUris(),
|
||
'should be', {start: reference.startTime, end: reference.endTime},
|
||
'but got', newBuffered);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Set the selected closed captions Id and language.
|
||
*
|
||
* @param {string} id
|
||
*/
|
||
setSelectedClosedCaptionId(id) {
|
||
const VIDEO = shaka.util.ManifestParserUtils.ContentType.VIDEO;
|
||
const videoBufferEndTime = this.bufferEnd(VIDEO) || 0;
|
||
this.textEngine_.setSelectedClosedCaptionId(id, videoBufferEndTime);
|
||
}
|
||
|
||
/** Disable embedded closed captions. */
|
||
clearSelectedClosedCaptionId() {
|
||
if (this.textEngine_) {
|
||
this.textEngine_.setSelectedClosedCaptionId('', 0);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation to remove data from the SourceBuffer.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} startTime relative to the start of the presentation
|
||
* @param {number} endTime relative to the start of the presentation
|
||
* @return {!Promise}
|
||
*/
|
||
async remove(contentType, startTime, endTime) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
await this.textEngine_.remove(startTime, endTime);
|
||
} else {
|
||
await this.enqueueOperation_(
|
||
contentType,
|
||
() => this.remove_(contentType, startTime, endTime),
|
||
null);
|
||
if (this.needSplitMuxedContent_) {
|
||
await this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.remove_(ContentType.AUDIO, startTime, endTime),
|
||
null);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation to clear the SourceBuffer.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @return {!Promise}
|
||
*/
|
||
async clear(contentType) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
if (!this.textEngine_) {
|
||
return;
|
||
}
|
||
await this.textEngine_.remove(0, Infinity);
|
||
} else {
|
||
// Note that not all platforms allow clearing to Infinity.
|
||
await this.enqueueOperation_(
|
||
contentType,
|
||
() => this.remove_(contentType, 0, this.mediaSource_.duration),
|
||
null);
|
||
if (this.needSplitMuxedContent_) {
|
||
await this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.remove_(
|
||
ContentType.AUDIO, 0, this.mediaSource_.duration),
|
||
null);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Fully reset the state of the caption parser owned by MediaSourceEngine.
|
||
*/
|
||
resetCaptionParser() {
|
||
if (this.captionParser_) {
|
||
this.captionParser_.reset();
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation to flush the SourceBuffer.
|
||
* This is a workaround for what we believe is a Chromecast bug.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @return {!Promise}
|
||
*/
|
||
async flush(contentType) {
|
||
// Flush the pipeline. Necessary on Chromecast, even though we have removed
|
||
// everything.
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
// Nothing to flush for text.
|
||
return;
|
||
}
|
||
await this.enqueueOperation_(
|
||
contentType,
|
||
() => this.flush_(contentType),
|
||
null);
|
||
if (this.needSplitMuxedContent_) {
|
||
await this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.flush_(ContentType.AUDIO),
|
||
null);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Sets the timestamp offset and append window end for the given content type.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} timestampOffset The timestamp offset. Segments which start
|
||
* at time t will be inserted at time t + timestampOffset instead. This
|
||
* value does not affect segments which have already been inserted.
|
||
* @param {number} appendWindowStart The timestamp to set the append window
|
||
* start to. For future appends, frames/samples with timestamps less than
|
||
* this value will be dropped.
|
||
* @param {number} appendWindowEnd The timestamp to set the append window end
|
||
* to. For future appends, frames/samples with timestamps greater than this
|
||
* value will be dropped.
|
||
* @param {boolean} ignoreTimestampOffset If true, the timestampOffset will
|
||
* not be applied in this step.
|
||
* @param {string} mimeType
|
||
* @param {string} codecs
|
||
* @param {!Map.<shaka.util.ManifestParserUtils.ContentType,
|
||
* shaka.extern.Stream>} streamsByType
|
||
* A map of content types to streams. All streams must be supported
|
||
* according to MediaSourceEngine.isStreamSupported.
|
||
*
|
||
* @return {!Promise}
|
||
*/
|
||
async setStreamProperties(
|
||
contentType, timestampOffset, appendWindowStart, appendWindowEnd,
|
||
ignoreTimestampOffset, mimeType, codecs, streamsByType) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
if (!ignoreTimestampOffset) {
|
||
this.textEngine_.setTimestampOffset(timestampOffset);
|
||
}
|
||
this.textEngine_.setAppendWindow(appendWindowStart, appendWindowEnd);
|
||
return;
|
||
}
|
||
const operations = [];
|
||
|
||
const hasChangedCodecs = await this.codecSwitchIfNecessary_(
|
||
contentType, mimeType, codecs, streamsByType);
|
||
|
||
if (!hasChangedCodecs) {
|
||
// Queue an abort() to help MSE splice together overlapping segments.
|
||
// We set appendWindowEnd when we change periods in DASH content, and the
|
||
// period transition may result in overlap.
|
||
//
|
||
// An abort() also helps with MPEG2-TS. When we append a TS segment, we
|
||
// always enter a PARSING_MEDIA_SEGMENT state and we can't change the
|
||
// timestamp offset. By calling abort(), we reset the state so we can
|
||
// set it.
|
||
operations.push(this.enqueueOperation_(
|
||
contentType,
|
||
() => this.abort_(contentType),
|
||
null));
|
||
if (this.needSplitMuxedContent_) {
|
||
operations.push(this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.abort_(ContentType.AUDIO),
|
||
null));
|
||
}
|
||
}
|
||
if (!ignoreTimestampOffset) {
|
||
operations.push(this.enqueueOperation_(
|
||
contentType,
|
||
() => this.setTimestampOffset_(contentType, timestampOffset),
|
||
null));
|
||
if (this.needSplitMuxedContent_) {
|
||
operations.push(this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.setTimestampOffset_(
|
||
ContentType.AUDIO, timestampOffset),
|
||
null));
|
||
}
|
||
}
|
||
operations.push(this.enqueueOperation_(
|
||
contentType,
|
||
() => this.setAppendWindow_(
|
||
contentType, appendWindowStart, appendWindowEnd),
|
||
null));
|
||
if (this.needSplitMuxedContent_) {
|
||
operations.push(this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.setAppendWindow_(
|
||
ContentType.AUDIO, appendWindowStart, appendWindowEnd),
|
||
null));
|
||
}
|
||
|
||
await Promise.all(operations);
|
||
}
|
||
|
||
/**
|
||
* Adjust timestamp offset to maintain AV sync across discontinuities.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} timestampOffset
|
||
* @return {!Promise}
|
||
*/
|
||
async resync(contentType, timestampOffset) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
|
||
if (contentType == ContentType.TEXT) {
|
||
// This operation is for audio and video only.
|
||
return;
|
||
}
|
||
|
||
// Reset the promise in case the timestamp offset changed during
|
||
// a period/discontinuity transition.
|
||
if (contentType == ContentType.VIDEO) {
|
||
this.textSequenceModeOffset_ = new shaka.util.PublicPromise();
|
||
}
|
||
|
||
if (!this.sequenceMode_) {
|
||
return;
|
||
}
|
||
|
||
// Queue an abort() to help MSE splice together overlapping segments.
|
||
// We set appendWindowEnd when we change periods in DASH content, and the
|
||
// period transition may result in overlap.
|
||
//
|
||
// An abort() also helps with MPEG2-TS. When we append a TS segment, we
|
||
// always enter a PARSING_MEDIA_SEGMENT state and we can't change the
|
||
// timestamp offset. By calling abort(), we reset the state so we can
|
||
// set it.
|
||
this.enqueueOperation_(
|
||
contentType,
|
||
() => this.abort_(contentType),
|
||
null);
|
||
if (this.needSplitMuxedContent_) {
|
||
this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.abort_(ContentType.AUDIO),
|
||
null);
|
||
}
|
||
await this.enqueueOperation_(
|
||
contentType,
|
||
() => this.setTimestampOffset_(contentType, timestampOffset),
|
||
null);
|
||
if (this.needSplitMuxedContent_) {
|
||
await this.enqueueOperation_(
|
||
ContentType.AUDIO,
|
||
() => this.setTimestampOffset_(ContentType.AUDIO, timestampOffset),
|
||
null);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @param {string=} reason Valid reasons are 'network' and 'decode'.
|
||
* @return {!Promise}
|
||
* @see http://w3c.github.io/media-source/#idl-def-EndOfStreamError
|
||
*/
|
||
async endOfStream(reason) {
|
||
await this.enqueueBlockingOperation_(() => {
|
||
// If endOfStream() has already been called on the media source,
|
||
// don't call it again. Also do not call if readyState is
|
||
// 'closed' (not attached to video element) since it is not a
|
||
// valid operation.
|
||
if (this.ended() || this.mediaSource_.readyState === 'closed') {
|
||
return;
|
||
}
|
||
// Tizen won't let us pass undefined, but it will let us omit the
|
||
// argument.
|
||
if (reason) {
|
||
this.mediaSource_.endOfStream(reason);
|
||
} else {
|
||
this.mediaSource_.endOfStream();
|
||
}
|
||
});
|
||
}
|
||
|
||
/**
|
||
* @param {number} duration
|
||
* @return {!Promise}
|
||
*/
|
||
async setDuration(duration) {
|
||
await this.enqueueBlockingOperation_(() => {
|
||
// Reducing the duration causes the MSE removal algorithm to run, which
|
||
// triggers an 'updateend' event to fire. To handle this scenario, we
|
||
// have to insert a dummy operation into the beginning of each queue,
|
||
// which the 'updateend' handler will remove.
|
||
if (duration < this.mediaSource_.duration) {
|
||
for (const contentType in this.sourceBuffers_) {
|
||
const dummyOperation = {
|
||
start: () => {},
|
||
p: new shaka.util.PublicPromise(),
|
||
uri: null,
|
||
};
|
||
this.queues_[contentType].unshift(dummyOperation);
|
||
}
|
||
}
|
||
|
||
this.mediaSource_.duration = duration;
|
||
this.lastDuration_ = duration;
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Get the current MediaSource duration.
|
||
*
|
||
* @return {number}
|
||
*/
|
||
getDuration() {
|
||
return this.mediaSource_.duration;
|
||
}
|
||
|
||
/**
|
||
* Append data to the SourceBuffer.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {BufferSource} data
|
||
* @param {number} timestampOffset
|
||
* @private
|
||
*/
|
||
append_(contentType, data, timestampOffset) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
|
||
// Append only video data to the LCEVC Dec.
|
||
if (contentType == ContentType.VIDEO && this.lcevcDec_) {
|
||
// Append video buffers to the LCEVC Dec for parsing and storing
|
||
// of LCEVC data.
|
||
this.lcevcDec_.appendBuffer(data, timestampOffset);
|
||
}
|
||
|
||
// This will trigger an 'updateend' event.
|
||
this.sourceBuffers_[contentType].appendBuffer(data);
|
||
}
|
||
|
||
/**
|
||
* Remove data from the SourceBuffer.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} startTime relative to the start of the presentation
|
||
* @param {number} endTime relative to the start of the presentation
|
||
* @private
|
||
*/
|
||
remove_(contentType, startTime, endTime) {
|
||
if (endTime <= startTime) {
|
||
// Ignore removal of inverted or empty ranges.
|
||
// Fake 'updateend' event to resolve the operation.
|
||
this.onUpdateEnd_(contentType);
|
||
return;
|
||
}
|
||
|
||
// This will trigger an 'updateend' event.
|
||
this.sourceBuffers_[contentType].remove(startTime, endTime);
|
||
}
|
||
|
||
/**
|
||
* Call abort() on the SourceBuffer.
|
||
* This resets MSE's last_decode_timestamp on all track buffers, which should
|
||
* trigger the splicing logic for overlapping segments.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @private
|
||
*/
|
||
abort_(contentType) {
|
||
// Save the append window, which is reset on abort().
|
||
const appendWindowStart =
|
||
this.sourceBuffers_[contentType].appendWindowStart;
|
||
const appendWindowEnd = this.sourceBuffers_[contentType].appendWindowEnd;
|
||
|
||
// This will not trigger an 'updateend' event, since nothing is happening.
|
||
// This is only to reset MSE internals, not to abort an actual operation.
|
||
this.sourceBuffers_[contentType].abort();
|
||
|
||
// Restore the append window.
|
||
this.sourceBuffers_[contentType].appendWindowStart = appendWindowStart;
|
||
this.sourceBuffers_[contentType].appendWindowEnd = appendWindowEnd;
|
||
|
||
// Fake an 'updateend' event to resolve the operation.
|
||
this.onUpdateEnd_(contentType);
|
||
}
|
||
|
||
/**
|
||
* Nudge the playhead to force the media pipeline to be flushed.
|
||
* This seems to be necessary on Chromecast to get new content to replace old
|
||
* content.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @private
|
||
*/
|
||
flush_(contentType) {
|
||
// Never use flush_ if there's data. It causes a hiccup in playback.
|
||
goog.asserts.assert(
|
||
this.video_.buffered.length == 0, 'MediaSourceEngine.flush_ should ' +
|
||
'only be used after clearing all data!');
|
||
|
||
// Seeking forces the pipeline to be flushed.
|
||
this.video_.currentTime -= 0.001;
|
||
|
||
// Fake an 'updateend' event to resolve the operation.
|
||
this.onUpdateEnd_(contentType);
|
||
}
|
||
|
||
/**
|
||
* Set the SourceBuffer's timestamp offset.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} timestampOffset
|
||
* @private
|
||
*/
|
||
setTimestampOffset_(contentType, timestampOffset) {
|
||
// Work around for
|
||
// https://github.com/shaka-project/shaka-player/issues/1281:
|
||
// TODO(https://bit.ly/2ttKiBU): follow up when this is fixed in Edge
|
||
if (timestampOffset < 0) {
|
||
// Try to prevent rounding errors in Edge from removing the first
|
||
// keyframe.
|
||
timestampOffset += 0.001;
|
||
}
|
||
|
||
this.sourceBuffers_[contentType].timestampOffset = timestampOffset;
|
||
|
||
// Fake an 'updateend' event to resolve the operation.
|
||
this.onUpdateEnd_(contentType);
|
||
}
|
||
|
||
/**
|
||
* Set the SourceBuffer's append window end.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {number} appendWindowStart
|
||
* @param {number} appendWindowEnd
|
||
* @private
|
||
*/
|
||
setAppendWindow_(contentType, appendWindowStart, appendWindowEnd) {
|
||
// You can't set start > end, so first set start to 0, then set the new
|
||
// end, then set the new start. That way, there are no intermediate
|
||
// states which are invalid.
|
||
this.sourceBuffers_[contentType].appendWindowStart = 0;
|
||
this.sourceBuffers_[contentType].appendWindowEnd = appendWindowEnd;
|
||
this.sourceBuffers_[contentType].appendWindowStart = appendWindowStart;
|
||
|
||
// Fake an 'updateend' event to resolve the operation.
|
||
this.onUpdateEnd_(contentType);
|
||
}
|
||
|
||
/**
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @private
|
||
*/
|
||
onError_(contentType) {
|
||
const operation = this.queues_[contentType][0];
|
||
goog.asserts.assert(operation, 'Spurious error event!');
|
||
goog.asserts.assert(!this.sourceBuffers_[contentType].updating,
|
||
'SourceBuffer should not be updating on error!');
|
||
const code = this.video_.error ? this.video_.error.code : 0;
|
||
operation.p.reject(new shaka.util.Error(
|
||
shaka.util.Error.Severity.CRITICAL,
|
||
shaka.util.Error.Category.MEDIA,
|
||
shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_FAILED,
|
||
code, operation.uri));
|
||
// Do not pop from queue. An 'updateend' event will fire next, and to
|
||
// avoid synchronizing these two event handlers, we will allow that one to
|
||
// pop from the queue as normal. Note that because the operation has
|
||
// already been rejected, the call to resolve() in the 'updateend' handler
|
||
// will have no effect.
|
||
}
|
||
|
||
/**
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @private
|
||
*/
|
||
onUpdateEnd_(contentType) {
|
||
if (this.reloadingMediaSource_) {
|
||
return;
|
||
}
|
||
const operation = this.queues_[contentType][0];
|
||
goog.asserts.assert(operation, 'Spurious updateend event!');
|
||
if (!operation) {
|
||
return;
|
||
}
|
||
goog.asserts.assert(!this.sourceBuffers_[contentType].updating,
|
||
'SourceBuffer should not be updating on updateend!');
|
||
operation.p.resolve();
|
||
this.popFromQueue_(contentType);
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation and start it if appropriate.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {function()} start
|
||
* @param {?string} uri
|
||
* @return {!Promise}
|
||
* @private
|
||
*/
|
||
enqueueOperation_(contentType, start, uri) {
|
||
this.destroyer_.ensureNotDestroyed();
|
||
const operation = {
|
||
start: start,
|
||
p: new shaka.util.PublicPromise(),
|
||
uri,
|
||
};
|
||
this.queues_[contentType].push(operation);
|
||
|
||
if (this.queues_[contentType].length == 1) {
|
||
this.startOperation_(contentType);
|
||
}
|
||
return operation.p;
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation which must block all other operations on all
|
||
* SourceBuffers.
|
||
*
|
||
* @param {function():(Promise|undefined)} run
|
||
* @return {!Promise}
|
||
* @private
|
||
*/
|
||
async enqueueBlockingOperation_(run) {
|
||
this.destroyer_.ensureNotDestroyed();
|
||
|
||
/** @type {!Array.<!shaka.util.PublicPromise>} */
|
||
const allWaiters = [];
|
||
|
||
// Enqueue a 'wait' operation onto each queue.
|
||
// This operation signals its readiness when it starts.
|
||
// When all wait operations are ready, the real operation takes place.
|
||
for (const contentType in this.sourceBuffers_) {
|
||
const ready = new shaka.util.PublicPromise();
|
||
const operation = {
|
||
start: () => ready.resolve(),
|
||
p: ready,
|
||
uri: null,
|
||
};
|
||
|
||
this.queues_[contentType].push(operation);
|
||
allWaiters.push(ready);
|
||
|
||
if (this.queues_[contentType].length == 1) {
|
||
operation.start();
|
||
}
|
||
}
|
||
|
||
// Return a Promise to the real operation, which waits to begin until
|
||
// there are no other in-progress operations on any SourceBuffers.
|
||
try {
|
||
await Promise.all(allWaiters);
|
||
} catch (error) {
|
||
// One of the waiters failed, which means we've been destroyed.
|
||
goog.asserts.assert(
|
||
this.destroyer_.destroyed(), 'Should be destroyed by now');
|
||
// We haven't popped from the queue. Canceled waiters have been removed
|
||
// by destroy. What's left now should just be resolved waiters. In
|
||
// uncompiled mode, we will maintain good hygiene and make sure the
|
||
// assert at the end of destroy passes. In compiled mode, the queues
|
||
// are wiped in destroy.
|
||
if (goog.DEBUG) {
|
||
for (const contentType in this.sourceBuffers_) {
|
||
if (this.queues_[contentType].length) {
|
||
goog.asserts.assert(
|
||
this.queues_[contentType].length == 1,
|
||
'Should be at most one item in queue!');
|
||
goog.asserts.assert(
|
||
allWaiters.includes(this.queues_[contentType][0].p),
|
||
'The item in queue should be one of our waiters!');
|
||
this.queues_[contentType].shift();
|
||
}
|
||
}
|
||
}
|
||
throw error;
|
||
}
|
||
|
||
if (goog.DEBUG) {
|
||
// If we did it correctly, nothing is updating.
|
||
for (const contentType in this.sourceBuffers_) {
|
||
goog.asserts.assert(
|
||
this.sourceBuffers_[contentType].updating == false,
|
||
'SourceBuffers should not be updating after a blocking op!');
|
||
}
|
||
}
|
||
|
||
// Run the real operation, which can be asynchronous.
|
||
try {
|
||
await run();
|
||
} catch (exception) {
|
||
throw new shaka.util.Error(
|
||
shaka.util.Error.Severity.CRITICAL,
|
||
shaka.util.Error.Category.MEDIA,
|
||
shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
|
||
exception,
|
||
this.video_.error || 'No error in the media element',
|
||
null);
|
||
} finally {
|
||
// Unblock the queues.
|
||
for (const contentType in this.sourceBuffers_) {
|
||
this.popFromQueue_(contentType);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Pop from the front of the queue and start a new operation.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @private
|
||
*/
|
||
popFromQueue_(contentType) {
|
||
// Remove the in-progress operation, which is now complete.
|
||
this.queues_[contentType].shift();
|
||
this.startOperation_(contentType);
|
||
}
|
||
|
||
/**
|
||
* Starts the next operation in the queue.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @private
|
||
*/
|
||
startOperation_(contentType) {
|
||
// Retrieve the next operation, if any, from the queue and start it.
|
||
const next = this.queues_[contentType][0];
|
||
if (next) {
|
||
try {
|
||
next.start();
|
||
} catch (exception) {
|
||
if (exception.name == 'QuotaExceededError') {
|
||
next.p.reject(new shaka.util.Error(
|
||
shaka.util.Error.Severity.CRITICAL,
|
||
shaka.util.Error.Category.MEDIA,
|
||
shaka.util.Error.Code.QUOTA_EXCEEDED_ERROR,
|
||
contentType));
|
||
} else {
|
||
next.p.reject(new shaka.util.Error(
|
||
shaka.util.Error.Severity.CRITICAL,
|
||
shaka.util.Error.Category.MEDIA,
|
||
shaka.util.Error.Code.MEDIA_SOURCE_OPERATION_THREW,
|
||
exception,
|
||
this.video_.error || 'No error in the media element',
|
||
next.uri));
|
||
}
|
||
this.popFromQueue_(contentType);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @return {!shaka.extern.TextDisplayer}
|
||
*/
|
||
getTextDisplayer() {
|
||
goog.asserts.assert(
|
||
this.textDisplayer_,
|
||
'TextDisplayer should only be null when this is destroyed');
|
||
|
||
return this.textDisplayer_;
|
||
}
|
||
|
||
/**
|
||
* @param {!shaka.extern.TextDisplayer} textDisplayer
|
||
*/
|
||
setTextDisplayer(textDisplayer) {
|
||
this.textDisplayer_ = textDisplayer;
|
||
if (this.textEngine_) {
|
||
this.textEngine_.setDisplayer(textDisplayer);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @param {boolean} segmentRelativeVttTiming
|
||
*/
|
||
setSegmentRelativeVttTiming(segmentRelativeVttTiming) {
|
||
this.segmentRelativeVttTiming_ = segmentRelativeVttTiming;
|
||
}
|
||
|
||
/**
|
||
* Apply platform-specific transformations to this segment to work around
|
||
* issues in the platform.
|
||
*
|
||
* @param {!BufferSource} segment
|
||
* @param {?number} startTime
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {?string} uri
|
||
* @return {!BufferSource}
|
||
* @private
|
||
*/
|
||
workAroundBrokenPlatforms_(segment, startTime, contentType, uri) {
|
||
const Platform = shaka.util.Platform;
|
||
|
||
const isInitSegment = startTime == null;
|
||
const encryptionExpected = this.expectedEncryption_[contentType];
|
||
const keySystem = this.playerInterface_.getKeySystem();
|
||
|
||
// If:
|
||
// 1. the configuration tells to insert fake encryption,
|
||
// 2. and this is an init segment,
|
||
// 3. and encryption is expected,
|
||
// 4. and the platform requires encryption in all init segments,
|
||
// 5. and the content is MP4 (mimeType == "video/mp4" or "audio/mp4"),
|
||
// then insert fake encryption metadata for init segments that lack it.
|
||
// The MP4 requirement is because we can currently only do this
|
||
// transformation on MP4 containers.
|
||
// See: https://github.com/shaka-project/shaka-player/issues/2759
|
||
if (this.config_.insertFakeEncryptionInInit &&
|
||
isInitSegment &&
|
||
encryptionExpected &&
|
||
Platform.requiresEncryptionInfoInAllInitSegments(keySystem) &&
|
||
shaka.util.MimeUtils.getContainerType(
|
||
this.sourceBufferTypes_[contentType]) == 'mp4') {
|
||
shaka.log.debug('Forcing fake encryption information in init segment.');
|
||
segment = shaka.media.ContentWorkarounds.fakeEncryption(segment, uri);
|
||
}
|
||
|
||
return segment;
|
||
}
|
||
|
||
/**
|
||
* Prepare the SourceBuffer to parse a potentially new type or codec.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {string} mimeType
|
||
* @param {?shaka.extern.Transmuxer} transmuxer
|
||
* @private
|
||
*/
|
||
change_(contentType, mimeType, transmuxer) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType === ContentType.TEXT) {
|
||
shaka.log.debug(`Change not supported for ${contentType}`);
|
||
return;
|
||
}
|
||
shaka.log.debug(
|
||
`Change Type: ${this.sourceBufferTypes_[contentType]} -> ${mimeType}`);
|
||
if (shaka.media.Capabilities.isChangeTypeSupported()) {
|
||
if (this.transmuxers_[contentType]) {
|
||
this.transmuxers_[contentType].destroy();
|
||
delete this.transmuxers_[contentType];
|
||
}
|
||
if (transmuxer) {
|
||
this.transmuxers_[contentType] = transmuxer;
|
||
}
|
||
const type = this.addExtraFeaturesToMimeType_(mimeType);
|
||
this.sourceBuffers_[contentType].changeType(type);
|
||
this.sourceBufferTypes_[contentType] = mimeType;
|
||
} else {
|
||
shaka.log.debug('Change Type not supported');
|
||
}
|
||
|
||
// Fake an 'updateend' event to resolve the operation.
|
||
this.onUpdateEnd_(contentType);
|
||
}
|
||
|
||
/**
|
||
* Enqueue an operation to prepare the SourceBuffer to parse a potentially new
|
||
* type or codec.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {string} mimeType
|
||
* @param {?shaka.extern.Transmuxer} transmuxer
|
||
* @return {!Promise}
|
||
*/
|
||
changeType(contentType, mimeType, transmuxer) {
|
||
return this.enqueueOperation_(
|
||
contentType,
|
||
() => this.change_(contentType, mimeType, transmuxer),
|
||
null);
|
||
}
|
||
|
||
/**
|
||
* Resets the MediaSource and re-adds source buffers due to codec mismatch
|
||
*
|
||
* @param {!Map.<shaka.util.ManifestParserUtils.ContentType,
|
||
* shaka.extern.Stream>} streamsByType
|
||
* @private
|
||
*/
|
||
async reset_(streamsByType) {
|
||
const Functional = shaka.util.Functional;
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
this.reloadingMediaSource_ = true;
|
||
this.needSplitMuxedContent_ = false;
|
||
const currentTime = this.video_.currentTime;
|
||
|
||
// When codec switching if the user is currently paused we don't want
|
||
// to trigger a play when switching codec.
|
||
// Playing can also end up in a paused state after a codec switch
|
||
// so we need to remember the current states.
|
||
const previousAutoPlayState = this.video_.autoplay;
|
||
const previousPausedState = this.video_.paused;
|
||
if (this.playbackHasBegun_) {
|
||
// Only set autoplay to false if the video playback has already begun.
|
||
// When a codec switch happens before playback has begun this can cause
|
||
// autoplay not to work as expected.
|
||
this.video_.autoplay = false;
|
||
}
|
||
|
||
try {
|
||
this.eventManager_.removeAll();
|
||
|
||
const cleanup = [];
|
||
for (const contentType in this.transmuxers_) {
|
||
cleanup.push(this.transmuxers_[contentType].destroy());
|
||
}
|
||
for (const contentType in this.queues_) {
|
||
// Make a local copy of the queue and the first item.
|
||
const q = this.queues_[contentType];
|
||
const inProgress = q[0];
|
||
|
||
// Drop everything else out of the original queue.
|
||
this.queues_[contentType] = q.slice(0, 1);
|
||
|
||
// We will wait for this item to complete/fail.
|
||
if (inProgress) {
|
||
cleanup.push(inProgress.p.catch(Functional.noop));
|
||
}
|
||
|
||
// The rest will be rejected silently if possible.
|
||
for (const item of q.slice(1)) {
|
||
item.p.reject(shaka.util.Destroyer.destroyedError());
|
||
}
|
||
}
|
||
for (const contentType in this.sourceBuffers_) {
|
||
const sourceBuffer = this.sourceBuffers_[contentType];
|
||
try {
|
||
this.mediaSource_.removeSourceBuffer(sourceBuffer);
|
||
} catch (e) {}
|
||
}
|
||
await Promise.all(cleanup);
|
||
this.transmuxers_ = {};
|
||
this.sourceBuffers_ = {};
|
||
|
||
const previousDuration = this.mediaSource_.duration;
|
||
this.mediaSourceOpen_ = new shaka.util.PublicPromise();
|
||
this.mediaSource_ = this.createMediaSource(this.mediaSourceOpen_);
|
||
await this.mediaSourceOpen_;
|
||
if (!isNaN(previousDuration) && previousDuration) {
|
||
this.mediaSource_.duration = previousDuration;
|
||
} else if (!isNaN(this.lastDuration_) && this.lastDuration_) {
|
||
this.mediaSource_.duration = this.lastDuration_;
|
||
}
|
||
|
||
const sourceBufferAdded = new shaka.util.PublicPromise();
|
||
const sourceBuffers =
|
||
/** @type {EventTarget} */(this.mediaSource_.sourceBuffers);
|
||
|
||
const totalOfBuffers = streamsByType.size;
|
||
let numberOfSourceBufferAdded = 0;
|
||
const onSourceBufferAdded = () => {
|
||
numberOfSourceBufferAdded++;
|
||
if (numberOfSourceBufferAdded === totalOfBuffers) {
|
||
sourceBufferAdded.resolve();
|
||
this.eventManager_.unlisten(sourceBuffers, 'addsourcebuffer',
|
||
onSourceBufferAdded);
|
||
}
|
||
};
|
||
|
||
this.eventManager_.listen(sourceBuffers, 'addsourcebuffer',
|
||
onSourceBufferAdded);
|
||
|
||
for (const contentType of streamsByType.keys()) {
|
||
const stream = streamsByType.get(contentType);
|
||
// eslint-disable-next-line no-await-in-loop
|
||
await this.initSourceBuffer_(contentType, stream, stream.codecs);
|
||
if (this.needSplitMuxedContent_) {
|
||
this.queues_[ContentType.AUDIO] = [];
|
||
this.queues_[ContentType.VIDEO] = [];
|
||
} else {
|
||
this.queues_[contentType] = [];
|
||
}
|
||
}
|
||
const audio = streamsByType.get(ContentType.AUDIO);
|
||
if (audio && audio.isAudioMuxedInVideo) {
|
||
this.needSplitMuxedContent_ = true;
|
||
}
|
||
|
||
// Fake a seek to catchup the playhead.
|
||
this.video_.currentTime = currentTime;
|
||
|
||
await sourceBufferAdded;
|
||
} finally {
|
||
this.reloadingMediaSource_ = false;
|
||
|
||
this.destroyer_.ensureNotDestroyed();
|
||
|
||
this.eventManager_.listenOnce(this.video_, 'canplaythrough', () => {
|
||
// Don't use ensureNotDestroyed() from this event listener, because
|
||
// that results in an uncaught exception. Instead, just check the
|
||
// flag.
|
||
if (this.destroyer_.destroyed()) {
|
||
return;
|
||
}
|
||
|
||
this.video_.autoplay = previousAutoPlayState;
|
||
if (!previousPausedState) {
|
||
this.video_.play();
|
||
}
|
||
});
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Resets the Media Source
|
||
* @param {!Map.<shaka.util.ManifestParserUtils.ContentType,
|
||
* shaka.extern.Stream>} streamsByType
|
||
* @return {!Promise}
|
||
*/
|
||
reset(streamsByType) {
|
||
return this.enqueueBlockingOperation_(
|
||
() => this.reset_(streamsByType));
|
||
}
|
||
|
||
/**
|
||
* Codec switch if necessary, this will not resolve until the codec
|
||
* switch is over.
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {string} mimeType
|
||
* @param {string} codecs
|
||
* @param {!Map.<shaka.util.ManifestParserUtils.ContentType,
|
||
* shaka.extern.Stream>} streamsByType
|
||
* @return {!Promise.<boolean>} true if there was a codec switch,
|
||
* false otherwise.
|
||
* @private
|
||
*/
|
||
async codecSwitchIfNecessary_(contentType, mimeType, codecs, streamsByType) {
|
||
const ContentType = shaka.util.ManifestParserUtils.ContentType;
|
||
if (contentType == ContentType.TEXT) {
|
||
return false;
|
||
}
|
||
const MimeUtils = shaka.util.MimeUtils;
|
||
const currentCodec = MimeUtils.getNormalizedCodec(
|
||
MimeUtils.getCodecs(this.sourceBufferTypes_[contentType]));
|
||
const currentBasicType = MimeUtils.getBasicType(
|
||
this.sourceBufferTypes_[contentType]);
|
||
|
||
/** @type {?shaka.extern.Transmuxer} */
|
||
let transmuxer;
|
||
let transmuxerMuxed = false;
|
||
let newMimeType = shaka.util.MimeUtils.getFullType(mimeType, codecs);
|
||
let needTransmux = this.config_.forceTransmux;
|
||
if (!shaka.media.Capabilities.isTypeSupported(newMimeType) ||
|
||
(!this.sequenceMode_ &&
|
||
shaka.util.MimeUtils.RAW_FORMATS.includes(newMimeType))) {
|
||
needTransmux = true;
|
||
}
|
||
const TransmuxerEngine = shaka.transmuxer.TransmuxerEngine;
|
||
if (needTransmux) {
|
||
const newMimeTypeWithAllCodecs =
|
||
shaka.util.MimeUtils.getFullTypeWithAllCodecs(mimeType, codecs);
|
||
const transmuxerPlugin =
|
||
TransmuxerEngine.findTransmuxer(newMimeTypeWithAllCodecs);
|
||
if (transmuxerPlugin) {
|
||
transmuxer = transmuxerPlugin();
|
||
const audioCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
|
||
ContentType.AUDIO, (codecs || '').split(','));
|
||
const videoCodec = shaka.util.ManifestParserUtils.guessCodecsSafe(
|
||
ContentType.VIDEO, (codecs || '').split(','));
|
||
if (audioCodec && videoCodec) {
|
||
transmuxerMuxed = true;
|
||
let codec = videoCodec;
|
||
if (contentType == ContentType.AUDIO) {
|
||
codec = audioCodec;
|
||
}
|
||
newMimeType = transmuxer.convertCodecs(contentType,
|
||
shaka.util.MimeUtils.getFullTypeWithAllCodecs(mimeType, codec));
|
||
} else {
|
||
newMimeType =
|
||
transmuxer.convertCodecs(contentType, newMimeTypeWithAllCodecs);
|
||
}
|
||
}
|
||
}
|
||
|
||
const newCodec = MimeUtils.getNormalizedCodec(
|
||
MimeUtils.getCodecs(newMimeType));
|
||
const newBasicType = MimeUtils.getBasicType(newMimeType);
|
||
|
||
// Current/new codecs base and basic type match then no need to switch
|
||
if (currentCodec === newCodec && currentBasicType === newBasicType) {
|
||
if (this.transmuxers_[contentType] && !transmuxer) {
|
||
this.transmuxers_[contentType].destroy();
|
||
delete this.transmuxers_[contentType];
|
||
} else if (!this.transmuxers_[contentType] && transmuxer) {
|
||
this.transmuxers_[contentType] = transmuxer;
|
||
} else if (transmuxer) {
|
||
// Compare if the transmuxer is different
|
||
if (this.transmuxers_[contentType] &&
|
||
this.transmuxers_[contentType].transmux != transmuxer.transmux) {
|
||
this.transmuxers_[contentType].destroy();
|
||
delete this.transmuxers_[contentType];
|
||
this.transmuxers_[contentType] = transmuxer;
|
||
} else {
|
||
transmuxer.destroy();
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
let allowChangeType = true;
|
||
if (this.needSplitMuxedContent_ || (transmuxerMuxed &&
|
||
transmuxer && !this.transmuxers_[contentType])) {
|
||
allowChangeType = false;
|
||
}
|
||
|
||
if (allowChangeType && this.config_.codecSwitchingStrategy ===
|
||
shaka.config.CodecSwitchingStrategy.SMOOTH &&
|
||
shaka.media.Capabilities.isChangeTypeSupported()) {
|
||
await this.changeType(contentType, newMimeType, transmuxer);
|
||
} else {
|
||
if (transmuxer) {
|
||
transmuxer.destroy();
|
||
}
|
||
await this.reset(streamsByType);
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* Returns true if it's necessary codec switch to load the new stream.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {shaka.extern.Stream} stream
|
||
* @param {string} refMimeType
|
||
* @param {string} refCodecs
|
||
* @return {boolean}
|
||
* @private
|
||
*/
|
||
isCodecSwitchNecessary_(contentType, stream, refMimeType, refCodecs) {
|
||
if (contentType == shaka.util.ManifestParserUtils.ContentType.TEXT) {
|
||
return false;
|
||
}
|
||
const MimeUtils = shaka.util.MimeUtils;
|
||
const currentCodec = MimeUtils.getNormalizedCodec(
|
||
MimeUtils.getCodecs(this.sourceBufferTypes_[contentType]));
|
||
const currentBasicType = MimeUtils.getBasicType(
|
||
this.sourceBufferTypes_[contentType]);
|
||
|
||
let newMimeType = shaka.util.MimeUtils.getFullType(refMimeType, refCodecs);
|
||
let needTransmux = this.config_.forceTransmux;
|
||
if (!shaka.media.Capabilities.isTypeSupported(newMimeType) ||
|
||
(!this.sequenceMode_ &&
|
||
shaka.util.MimeUtils.RAW_FORMATS.includes(newMimeType))) {
|
||
needTransmux = true;
|
||
}
|
||
const newMimeTypeWithAllCodecs =
|
||
shaka.util.MimeUtils.getFullTypeWithAllCodecs(
|
||
refMimeType, refCodecs);
|
||
const TransmuxerEngine = shaka.transmuxer.TransmuxerEngine;
|
||
if (needTransmux) {
|
||
const transmuxerPlugin =
|
||
TransmuxerEngine.findTransmuxer(newMimeTypeWithAllCodecs);
|
||
if (transmuxerPlugin) {
|
||
const transmuxer = transmuxerPlugin();
|
||
newMimeType =
|
||
transmuxer.convertCodecs(contentType, newMimeTypeWithAllCodecs);
|
||
transmuxer.destroy();
|
||
}
|
||
}
|
||
|
||
const newCodec = MimeUtils.getNormalizedCodec(
|
||
MimeUtils.getCodecs(newMimeType));
|
||
const newBasicType = MimeUtils.getBasicType(newMimeType);
|
||
|
||
return currentCodec !== newCodec || currentBasicType !== newBasicType;
|
||
}
|
||
|
||
/**
|
||
* Returns true if it's necessary reset the media source to load the
|
||
* new stream.
|
||
*
|
||
* @param {shaka.util.ManifestParserUtils.ContentType} contentType
|
||
* @param {shaka.extern.Stream} stream
|
||
* @param {string} mimeType
|
||
* @param {string} codecs
|
||
* @return {boolean}
|
||
*/
|
||
isResetMediaSourceNecessary(contentType, stream, mimeType, codecs) {
|
||
if (!this.isCodecSwitchNecessary_(contentType, stream, mimeType, codecs)) {
|
||
return false;
|
||
}
|
||
|
||
return this.config_.codecSwitchingStrategy !==
|
||
shaka.config.CodecSwitchingStrategy.SMOOTH ||
|
||
!shaka.media.Capabilities.isChangeTypeSupported() ||
|
||
this.needSplitMuxedContent_;
|
||
}
|
||
|
||
/**
|
||
* Update LCEVC Decoder object when ready for LCEVC Decode.
|
||
* @param {?shaka.lcevc.Dec} lcevcDec
|
||
*/
|
||
updateLcevcDec(lcevcDec) {
|
||
this.lcevcDec_ = lcevcDec;
|
||
}
|
||
|
||
/**
|
||
* @param {string} mimeType
|
||
* @return {string}
|
||
* @private
|
||
*/
|
||
addExtraFeaturesToMimeType_(mimeType) {
|
||
const extraFeatures = this.config_.addExtraFeaturesToSourceBuffer(mimeType);
|
||
const extendedType = mimeType + extraFeatures;
|
||
shaka.log.debug('Using full mime type', extendedType);
|
||
|
||
return extendedType;
|
||
}
|
||
};
|
||
|
||
|
||
/**
|
||
* Internal reference to window.URL.createObjectURL function to avoid
|
||
* compatibility issues with other libraries and frameworks such as React
|
||
* Native. For use in unit tests only, not meant for external use.
|
||
*
|
||
* @type {function(?):string}
|
||
*/
|
||
shaka.media.MediaSourceEngine.createObjectURL = window.URL.createObjectURL;
|
||
|
||
|
||
/**
|
||
* @typedef {{
|
||
* start: function(),
|
||
* p: !shaka.util.PublicPromise,
|
||
* uri: ?string
|
||
* }}
|
||
*
|
||
* @summary An operation in queue.
|
||
* @property {function()} start
|
||
* The function which starts the operation.
|
||
* @property {!shaka.util.PublicPromise} p
|
||
* The PublicPromise which is associated with this operation.
|
||
* @property {?string} uri
|
||
* A segment URI (if any) associated with this operation.
|
||
*/
|
||
shaka.media.MediaSourceEngine.Operation;
|
||
|
||
|
||
/**
|
||
* @enum {string}
|
||
* @private
|
||
*/
|
||
shaka.media.MediaSourceEngine.SourceBufferMode_ = {
|
||
SEQUENCE: 'sequence',
|
||
SEGMENTS: 'segments',
|
||
};
|
||
|
||
|
||
/**
|
||
* @typedef {{
|
||
* getKeySystem: function():?string,
|
||
* onMetadata: function(!Array<shaka.extern.ID3Metadata>, number, ?number),
|
||
* onEvent: function(!Event),
|
||
* onManifestUpdate: function()
|
||
* }}
|
||
*
|
||
* @summary Player interface
|
||
* @property {function():?string} getKeySystem
|
||
* Gets currently used key system or null if not used.
|
||
* @property {function(
|
||
* !Array<shaka.extern.ID3Metadata>, number, ?number)} onMetadata
|
||
* Callback to use when metadata arrives.
|
||
* @property {function(!Event)} onEvent
|
||
* Called when an event occurs that should be sent to the app.
|
||
* @property {function()} onManifestUpdate
|
||
* Called when an embedded 'emsg' box should trigger a manifest update.
|
||
*/
|
||
shaka.media.MediaSourceEngine.PlayerInterface;
|