230 lines
9.1 KiB
JavaScript
230 lines
9.1 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
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var _events = require('../events');
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var _events2 = _interopRequireDefault(_events);
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var _eventHandler = require('../event-handler');
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var _eventHandler2 = _interopRequireDefault(_eventHandler);
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var _logger = require('../utils/logger');
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /*
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* audio track controller
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*/
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function filterSubtitleTracks(textTrackList) {
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var tracks = [];
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for (var i = 0; i < textTrackList.length; i++) {
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if (textTrackList[i].kind === 'subtitles') {
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tracks.push(textTrackList[i]);
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}
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}
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return tracks;
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}
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var SubtitleTrackController = function (_EventHandler) {
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_inherits(SubtitleTrackController, _EventHandler);
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function SubtitleTrackController(hls) {
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_classCallCheck(this, SubtitleTrackController);
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var _this = _possibleConstructorReturn(this, (SubtitleTrackController.__proto__ || Object.getPrototypeOf(SubtitleTrackController)).call(this, hls, _events2.default.MEDIA_ATTACHED, _events2.default.MEDIA_DETACHING, _events2.default.MANIFEST_LOADING, _events2.default.MANIFEST_LOADED, _events2.default.SUBTITLE_TRACK_LOADED));
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_this.tracks = [];
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_this.trackId = -1;
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_this.media = undefined;
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return _this;
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}
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_createClass(SubtitleTrackController, [{
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key: '_onTextTracksChanged',
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value: function _onTextTracksChanged() {
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// Media is undefined when switching streams via loadSource()
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if (!this.media) {
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return;
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}
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var trackId = -1;
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var tracks = filterSubtitleTracks(this.media.textTracks);
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for (var id = 0; id < tracks.length; id++) {
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if (tracks[id].mode === 'showing') {
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trackId = id;
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}
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}
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// Setting current subtitleTrack will invoke code.
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this.subtitleTrack = trackId;
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}
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}, {
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key: 'destroy',
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value: function destroy() {
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_eventHandler2.default.prototype.destroy.call(this);
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}
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// Listen for subtitle track change, then extract the current track ID.
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}, {
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key: 'onMediaAttached',
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value: function onMediaAttached(data) {
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this.media = data.media;
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if (!this.media) {
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return;
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}
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this.trackChangeListener = this._onTextTracksChanged.bind(this);
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this.media.textTracks.addEventListener('change', this.trackChangeListener);
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}
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}, {
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key: 'onMediaDetaching',
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value: function onMediaDetaching() {
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if (!this.media) {
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return;
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}
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this.media.textTracks.removeEventListener('change', this.trackChangeListener);
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this.media = undefined;
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}
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// Reset subtitle tracks on manifest loading
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}, {
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key: 'onManifestLoading',
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value: function onManifestLoading() {
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this.tracks = [];
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this.trackId = -1;
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}
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// Fired whenever a new manifest is loaded.
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}, {
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key: 'onManifestLoaded',
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value: function onManifestLoaded(data) {
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var _this2 = this;
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var tracks = data.subtitles || [];
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var defaultFound = false;
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this.tracks = tracks;
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this.trackId = -1;
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this.hls.trigger(_events2.default.SUBTITLE_TRACKS_UPDATED, { subtitleTracks: tracks });
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// loop through available subtitle tracks and autoselect default if needed
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// TODO: improve selection logic to handle forced, etc
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tracks.forEach(function (track) {
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if (track.default) {
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_this2.subtitleTrack = track.id;
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defaultFound = true;
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}
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});
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}
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// Trigger subtitle track playlist reload.
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}, {
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key: 'onTick',
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value: function onTick() {
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var trackId = this.trackId;
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var subtitleTrack = this.tracks[trackId];
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if (!subtitleTrack) {
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return;
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}
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var details = subtitleTrack.details;
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// check if we need to load playlist for this subtitle Track
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if (details === undefined || details.live === true) {
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// track not retrieved yet, or live playlist we need to (re)load it
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_logger.logger.log('(re)loading playlist for subtitle track ' + trackId);
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this.hls.trigger(_events2.default.SUBTITLE_TRACK_LOADING, { url: subtitleTrack.url, id: trackId });
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}
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}
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}, {
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key: 'onSubtitleTrackLoaded',
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value: function onSubtitleTrackLoaded(data) {
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var _this3 = this;
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if (data.id < this.tracks.length) {
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_logger.logger.log('subtitle track ' + data.id + ' loaded');
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this.tracks[data.id].details = data.details;
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// check if current playlist is a live playlist
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if (data.details.live && !this.timer) {
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// if live playlist we will have to reload it periodically
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// set reload period to playlist target duration
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this.timer = setInterval(function () {
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_this3.onTick();
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}, 1000 * data.details.targetduration, this);
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}
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if (!data.details.live && this.timer) {
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// playlist is not live and timer is armed : stopping it
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clearInterval(this.timer);
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this.timer = null;
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}
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}
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}
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/** get alternate subtitle tracks list from playlist **/
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}, {
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key: 'setSubtitleTrackInternal',
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value: function setSubtitleTrackInternal(newId) {
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// check if level idx is valid
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if (newId >= 0 && newId < this.tracks.length) {
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// stopping live reloading timer if any
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if (this.timer) {
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clearInterval(this.timer);
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this.timer = null;
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}
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this.trackId = newId;
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_logger.logger.log('switching to subtitle track ' + newId);
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var subtitleTrack = this.tracks[newId];
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this.hls.trigger(_events2.default.SUBTITLE_TRACK_SWITCH, { id: newId });
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// check if we need to load playlist for this subtitle Track
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var details = subtitleTrack.details;
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if (details === undefined || details.live === true) {
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// track not retrieved yet, or live playlist we need to (re)load it
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_logger.logger.log('(re)loading playlist for subtitle track ' + newId);
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this.hls.trigger(_events2.default.SUBTITLE_TRACK_LOADING, { url: subtitleTrack.url, id: newId });
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}
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}
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}
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}, {
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key: 'subtitleTracks',
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get: function get() {
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return this.tracks;
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}
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/** get index of the selected subtitle track (index in subtitle track lists) **/
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}, {
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key: 'subtitleTrack',
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get: function get() {
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return this.trackId;
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}
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/** select a subtitle track, based on its index in subtitle track lists**/
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,
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set: function set(subtitleTrackId) {
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if (this.trackId !== subtitleTrackId) {
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// || this.tracks[subtitleTrackId].details === undefined) {
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this.setSubtitleTrackInternal(subtitleTrackId);
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}
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}
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}]);
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return SubtitleTrackController;
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}(_eventHandler2.default);
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exports.default = SubtitleTrackController;
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