/*! @license * Shaka Player * Copyright 2016 Google LLC * SPDX-License-Identifier: Apache-2.0 *//** * @externs *//** * @typedef {{ * presentationTimeline: !shaka.media.PresentationTimeline, * variants: !Array.<shaka.extern.Variant>, * textStreams: !Array.<shaka.extern.Stream>, * imageStreams: !Array.<shaka.extern.Stream>, * offlineSessionIds: !Array.<string>, * minBufferTime: number, * sequenceMode: boolean, * ignoreManifestTimestampsInSegmentsMode: boolean, * type: string, * serviceDescription: ?shaka.extern.ServiceDescription, * nextUrl: ?string, * periodCount: number, * gapCount: number, * isLowLatency: boolean * }} * * @description * <p> * A Manifest object describes a collection of streams (segmented audio, video, * or text data) that share a common timeline. We call the collection of * streams "the presentation" and their timeline "the presentation timeline". * A Manifest describes one of two types of presentations: live and * video-on-demand. * </p> * * <p> * A live presentation begins at some point in time and either continues * indefinitely or ends when the presentation stops broadcasting. For a live * presentation, wall-clock time maps onto the presentation timeline, and the * current wall-clock time maps to the live-edge (AKA "the current presentation * time"). In contrast, a video-on-demand presentation exists entirely * independent of wall-clock time. * </p> * * <p> * A variant is a combination of an audio and a video streams that can be played * together. * </p> * * <p> * A stream has the same logical content as another stream if the only * difference between the two is their quality. For example, an SD video stream * and an HD video stream that depict the same scene have the same logical * content; whereas an English audio stream and a French audio stream have * different logical contents. The player can automatically switch between * streams which have the same logical content to adapt to network conditions. * </p> * * @property {!shaka.media.PresentationTimeline} presentationTimeline * <i>Required.</i> <br> * The presentation timeline. * @property {!Array.<shaka.extern.Variant>} variants * <i>Required.</i> <br> * The presentation's Variants. There must be at least one Variant. * @property {!Array.<shaka.extern.Stream>} textStreams * <i>Required.</i> <br> * The presentation's text streams. * @property {!Array.<shaka.extern.Stream>} imageStreams * <i>Required.</i> <br> * The presentation's image streams * @property {!Array.<string>} offlineSessionIds * <i>Defaults to [].</i> <br> * An array of EME sessions to load for offline playback. * @property {number} minBufferTime * <i>Defaults to 0.</i> <br> * The minimum number of seconds of content that must be buffered before * playback can begin. Can be overridden by a higher value from the Player * configuration. * @property {boolean} sequenceMode * If true, we will append the media segments using sequence mode; that is to * say, ignoring any timestamps inside the media files. * @property {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. * Only applies when sequenceMode is <code>false</code>, and only for HLS * streams. * <i>Defaults to <code>false</code>.</i> * @property {string} type * Indicates the type of the manifest. It can be <code>'HLS'</code> or * <code>'DASH'</code>. * @property {?shaka.extern.ServiceDescription} serviceDescription * The service description for the manifest. Used to adapt playbackRate to * decrease latency. * @property {?string} nextUrl * The next url to play. * @property {number} periodCount * Number of periods found in a manifest. For DASH, it represents number of * Period elements in a manifest. If streaming protocol does not implement * period-like structure, it should be set to 1. * <i>Defaults to <code>1</code>.</i> * @property {number} gapCount * The amount of gaps found in a manifest. For DASH, it represents number of * discontinuities found between periods. For HLS, it is a number of EXT-X-GAP * and GAP=YES occurrences. For MSS, it is always set to 0. * If in src= mode or nothing is loaded, NaN. * @property {bolean} isLowLatency * If true, the manifest is Low Latency. * * @exportDoc */shaka.extern.Manifest;/** * @typedef {{* id: string,* audioStreams: !Array.<shaka.extern.Stream>,* videoStreams: !Array.<shaka.extern.Stream>,* textStreams: !Array.<shaka.extern.Stream>,* imageStreams: !Array.<shaka.extern.Stream>* }}** @description Contains the streams from one DASH period.* For use in {@link shaka.util.PeriodCombiner}.** @property {string} id* The Period ID.* @property {!Array.<shaka.extern.Stream>} audioStreams* The audio streams from one Period.* @property {!Array.<shaka.extern.Stream>} videoStreams* The video streams from one Period.* @property {!Array.<shaka.extern.Stream>} textStreams* The text streams from one Period.* @property {!Array.<shaka.extern.Stream>} imageStreams* The image streams from one Period.** @exportDoc*/shaka.extern.Period;/** * @typedef {{ * targetLatency:?number, * maxLatency: ?number, * maxPlaybackRate: ?number, * minLatency: ?number, * minPlaybackRate: ?number * }} * * @description * Maximum and minimum latency and playback rate for a manifest. When max * latency is reached playbackrate is updated to maxPlaybackRate to decrease * latency. When min latency is reached playbackrate is updated to * minPlaybackRate to increase latency. * More information {@link https://dashif.org/docs/CR-Low-Latency-Live-r8.pdf here}. * * @property {?number} targetLatency * The target latency to aim for. * @property {?number} maxLatency * Maximum latency in seconds. * @property {?number} maxPlaybackRate * Maximum playback rate. * @property {?number} minLatency * Minimum latency in seconds. * @property {?number} minPlaybackRate * Minimum playback rate. * * @exportDoc */shaka.extern.ServiceDescription;/** * @typedef {{ * id: number, * language: string, * disabledUntilTime: number, * primary: boolean, * audio: ?shaka.extern.Stream, * video: ?shaka.extern.Stream, * bandwidth: number, * allowedByApplication: boolean, * allowedByKeySystem: boolean, * decodingInfos: !Array.<MediaCapabilitiesDecodingInfo> * }} * * @description * A Variant describes a combination of an audio and video streams which * could be played together. It's possible to have a video/audio only * variant. * * @property {number} id * <i>Required.</i> <br> * A unique ID among all Variant objects within the same Manifest. * @property {string} language * <i>Defaults to '' (i.e., unknown).</i> <br> * The Variant's language, specified as a language code. <br> * See {@link https://tools.ietf.org/html/rfc5646} <br> * See {@link http://www.iso.org/iso/home/standards/language_codes.htm} * @property {number} disabledUntilTime * <i>Defaults to 0.</i> <br> * 0 means the variant is enabled. The Player will set this value to * "(Date.now() / 1000) + config.streaming.maxDisabledTime" and once this * maxDisabledTime has passed Player will set the value to 0 in order to * reenable the variant. * @property {boolean} primary * <i>Defaults to false.</i> <br> * True indicates that the player should use this Variant over others if user * preferences cannot be met. The player may still use another Variant to * meet user preferences. * @property {?shaka.extern.Stream} audio * The audio stream of the variant. * @property {?shaka.extern.Stream} video * The video stream of the variant. * @property {number} bandwidth * The variant's required bandwidth in bits per second. * @property {boolean} allowedByApplication * <i>Defaults to true.</i><br> * Set by the Player to indicate whether the variant is allowed to be played * by the application. * @property {boolean} allowedByKeySystem * <i>Defaults to true.</i><br> * Set by the Player to indicate whether the variant is allowed to be played * by the key system. * @property {!Array.<MediaCapabilitiesDecodingInfo>} decodingInfos * <i>Defaults to [].</i><br> * Set by StreamUtils to indicate the results from MediaCapabilities * decodingInfo. * * @exportDoc */shaka.extern.Variant;/** * Creates a SegmentIndex; returns a Promise that resolves after the * SegmentIndex has been created. * * @typedef {function(): !Promise} * @exportDoc */shaka.extern.CreateSegmentIndexFunction;/** * @typedef {{ * bitsKey: number, * blockCipherMode: string, * cryptoKey: (webCrypto.CryptoKey|undefined), * fetchKey: (shaka.extern.CreateSegmentIndexFunction|undefined), * iv: (!Uint8Array|undefined), * firstMediaSequenceNumber: number * }} * * @description * AES key and iv info from the manifest. * * @property {number} bitsKey * The number of the bit key (eg: 128, 256). * @property {string} blockCipherMode * The block cipher mode of operation. Possible values: 'CTR' or 'CBC'. * @property {webCrypto.CryptoKey|undefined} cryptoKey * Web crypto key object of the AES key. If unset, the "fetchKey" * property should be provided. * @property {shaka.extern.FetchCryptoKeysFunction|undefined} fetchKey * A function that fetches the key. * Should be provided if the "cryptoKey" property is unset. * Should update this object in-place, to set "cryptoKey". * @property {(!Uint8Array|undefined)} iv * The IV in the manifest, if defined. For HLS see HLS RFC 8216 Section 5.2 * for handling undefined IV. * @property {number} firstMediaSequenceNumber * The starting Media Sequence Number of the playlist, used when IV is * undefined. * * @exportDoc */shaka.extern.aesKey;/** * A function that fetches the crypto keys for AES-128. * Returns a promise that resolves when the keys have been fetched. * * @typedef {function(): !Promise} * @exportDoc */shaka.extern.FetchCryptoKeysFunction;/** * SegmentIndex minimal API. * @interface * @exportDoc */shaka.extern.SegmentIndex = class { /** * Get number of references. * @return {number} * @exportDoc */ getNumReferences() {} /** * Finds the position of the segment for the given time, in seconds, relative * to the start of the presentation. Returns the position of the segment * with the largest end time if more than one segment is known for the given * time. * * @param {number} time * @return {?number} The position of the segment, or null if the position of * the segment could not be determined. * @exportDoc */ find(time) {} /** * Gets the SegmentReference for the segment at the given position. * * @param {number} position The position of the segment as returned by find(). * @return {shaka.media.SegmentReference} The SegmentReference, or null if * no such SegmentReference exists. * @exportDoc */ get(position) {} /** * Gets number of already evicted segments. * @return {number} * @exportDoc */ getNumEvicted() {}};/** * @typedef {{ * id: number, * originalId: ?string, * groupId: ?string, * createSegmentIndex: shaka.extern.CreateSegmentIndexFunction, * closeSegmentIndex: (function()|undefined), * segmentIndex: shaka.media.SegmentIndex, * mimeType: string, * codecs: string, * frameRate: (number|undefined), * pixelAspectRatio: (string|undefined), * hdr: (string|undefined), * colorGamut: (string|undefined), * videoLayout: (string|undefined), * bandwidth: (number|undefined), * width: (number|undefined), * height: (number|undefined), * kind: (string|undefined), * encrypted: boolean, * drmInfos: !Array.<shaka.extern.DrmInfo>, * keyIds: !Set.<string>, * language: string, * originalLanguage: ?string, * label: ?string, * type: string, * primary: boolean, * trickModeVideo: ?shaka.extern.Stream, * emsgSchemeIdUris: ?Array.<string>, * roles: !Array.<string>, * accessibilityPurpose: ?shaka.media.ManifestParser.AccessibilityPurpose, * forced: boolean, * channelsCount: ?number, * audioSamplingRate: ?number, * spatialAudio: boolean, * closedCaptions: Map.<string, string>, * tilesLayout: (string|undefined), * matchedStreams: * (!Array.<shaka.extern.Stream>|!Array.<shaka.extern.StreamDB>| * undefined), * mssPrivateData: (shaka.extern.MssPrivateData|undefined), * external: boolean, * fastSwitching: boolean, * fullMimeTypes: !Set.<string> * }} * * @description * A Stream object describes a single stream (segmented media data). * * @property {number} id * <i>Required.</i> <br> * A unique ID among all Stream objects within the same Manifest. * @property {?string} originalId * <i>Optional.</i> <br> * The original ID, if any, that appeared in the manifest. For example, in * DASH, this is the "id" attribute of the Representation element. In HLS, * this is the "NAME" attribute. * @property {?string} groupId * <i>Optional.</i> <br> * The ID of the stream's parent element. In DASH, this will be a unique * ID that represents the representation's parent adaptation element * @property {shaka.extern.CreateSegmentIndexFunction} createSegmentIndex * <i>Required.</i> <br> * Creates the Stream's segmentIndex (asynchronously). * @property {(function()|undefined)} closeSegmentIndex * <i>Optional.</i> <br> * Closes the Stream's segmentIndex. * @property {shaka.media.SegmentIndex} segmentIndex * <i>Required.</i> <br> * May be null until createSegmentIndex() is complete. * @property {string} mimeType * <i>Required.</i> <br> * The Stream's MIME type, e.g., 'audio/mp4', 'video/webm', or 'text/vtt'. * In the case of a stream that adapts between different periods with * different MIME types, this represents only the first period. * @property {string} codecs * <i>Defaults to '' (i.e., unknown / not needed).</i> <br> * The Stream's codecs, e.g., 'avc1.4d4015' or 'vp9', which must be * compatible with the Stream's MIME type. <br> * In the case of a stream that adapts between different periods with * different codecs, this represents only the first period. * See {@link https://tools.ietf.org/html/rfc6381} * @property {(number|undefined)} frameRate * <i>Video streams only.</i> <br> * The Stream's framerate in frames per second * @property {(string|undefined)} pixelAspectRatio * <i>Video streams only.</i> <br> * The Stream's pixel aspect ratio * @property {(string|undefined)} hdr * <i>Video streams only.</i> <br> * The Stream's HDR info * @property {(string|undefined)} colorGamut * <i>Video streams only.</i> <br> * The Stream's color gamut info * @property {(string|undefined)} videoLayout * <i>Video streams only.</i> <br> * The Stream's video layout info. * @property {(number|undefined)} bandwidth * <i>Audio and video streams only.</i> <br> * The stream's required bandwidth in bits per second. * @property {(number|undefined)} width * <i>Video streams only.</i> <br> * The stream's width in pixels. * @property {(number|undefined)} height * <i>Video streams only.</i> <br> * The stream's height in pixels. * @property {(string|undefined)} kind * <i>Text streams only.</i> <br> * The kind of text stream. For example, 'caption' or 'subtitle'. * @see https://bit.ly/TextKind * @property {boolean} encrypted * <i>Defaults to false.</i><br> * True if the stream is encrypted. * @property {!Array.<!shaka.extern.DrmInfo>} drmInfos * <i>Defaults to [] (i.e., no DRM).</i> <br> * An array of DrmInfo objects which describe DRM schemes are compatible with * the content. * @property {!Set.<string>} keyIds * <i>Defaults to empty (i.e., unencrypted or key ID unknown).</i> <br> * The stream's key IDs as lowercase hex strings. These key IDs identify the * encryption keys that the browser (key system) can use to decrypt the * stream. * @property {string} language * The Stream's language, specified as a language code. <br> * Audio stream's language must be identical to the language of the containing * Variant. * @property {?string} originalLanguage * <i>Optional.</i> <br> * The original language, if any, that appeared in the manifest. * @property {?string} label * The Stream's label, unique text that should describe the audio/text track. * @property {string} type * <i>Required.</i> <br> * Content type (e.g. 'video', 'audio' or 'text', 'image') * @property {boolean} primary * <i>Defaults to false.</i> <br> * True indicates that the player should use this Stream over others if user * preferences cannot be met. The player may still use another Variant to * meet user preferences. * @property {?shaka.extern.Stream} trickModeVideo * <i>Video streams only.</i> <br> * An alternate video stream to use for trick mode playback. * @property {?Array.<string>} emsgSchemeIdUris * <i>Defaults to empty.</i><br> * Array of registered emsg box scheme_id_uri that should result in * Player events. * @property {!Array.<string>} roles * The roles of the stream as they appear on the manifest, * e.g. 'main', 'caption', or 'commentary'. * @property {?shaka.media.ManifestParser.AccessibilityPurpose} * accessibilityPurpose * The DASH accessibility descriptor, if one was provided for this stream. * @property {boolean} forced * <i>Defaults to false.</i> <br> * Whether the stream set was forced * @property {?number} channelsCount * The channel count information for the audio stream. * @property {?number} audioSamplingRate * Specifies the maximum sampling rate of the content. * @property {boolean} spatialAudio * <i>Defaults to false.</i> <br> * Whether the stream set has spatial audio * @property {Map.<string, string>} closedCaptions * A map containing the description of closed captions, with the caption * channel number (CC1 | CC2 | CC3 | CC4) as the key and the language code * as the value. If the channel number is not provided by the description, * we'll set a 0-based index as the key. If the language code is not * provided by the description we'll set the same value as channel number. * Example: {'CC1': 'eng'; 'CC3': 'swe'}, or {'1', 'eng'; '2': 'swe'}, etc. * @property {(string|undefined)} tilesLayout * <i>Image streams only.</i> <br> * The value is a grid-item-dimension consisting of two positive decimal * integers in the format: column-x-row ('4x3'). It describes the arrangement * of Images in a Grid. The minimum valid LAYOUT is '1x1'. * @property {(!Array.<shaka.extern.Stream>|!Array.<shaka.extern.StreamDB>| * undefined)} matchedStreams * The streams in all periods which match the stream. Used for Dash. * @property {(shaka.extern.MssPrivateData|undefined)} mssPrivateData * <i>Microsoft Smooth Streaming only.</i> <br> * Private MSS data that is necessary to be able to do transmuxing. * @property {boolean} external * Indicate if the stream was added externally. * Eg: external text tracks. * @property {boolean} fastSwitching * Indicate if the stream should be used for fast switching. * @property {!Set.<string>} fullMimeTypes * A set of full MIME types (e.g. MIME types plus codecs information), that * represents the types used in each period of the original manifest. * Meant for being used by compatibility checking, such as with * MediaSource.isTypeSupported. * * @exportDoc */shaka.extern.Stream;/** * @typedef {{ * duration: number, * timescale: number, * codecPrivateData: ?string * }} * * @description * Private MSS data that is necessary to be able to do transmuxing. * * @property {number} duration * <i>Required.</i> <br> * MSS Stream duration. * @property {number} timescale * <i>Required.</i> <br> * MSS timescale. * @property {?string} codecPrivateData * MSS codecPrivateData. * * @exportDoc */shaka.extern.MssPrivateData;