160 lines
7.1 KiB
JavaScript
160 lines
7.1 KiB
JavaScript
'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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* Subtitle Stream Controller
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*/
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var SubtitleStreamController = function (_EventHandler) {
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_inherits(SubtitleStreamController, _EventHandler);
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function SubtitleStreamController(hls) {
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_classCallCheck(this, SubtitleStreamController);
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var _this = _possibleConstructorReturn(this, (SubtitleStreamController.__proto__ || Object.getPrototypeOf(SubtitleStreamController)).call(this, hls, _events2.default.ERROR, _events2.default.SUBTITLE_TRACKS_UPDATED, _events2.default.SUBTITLE_TRACK_SWITCH, _events2.default.SUBTITLE_TRACK_LOADED, _events2.default.SUBTITLE_FRAG_PROCESSED));
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_this.config = hls.config;
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_this.vttFragSNsProcessed = {};
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_this.vttFragQueues = undefined;
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_this.currentlyProcessing = null;
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_this.currentTrackId = -1;
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return _this;
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}
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_createClass(SubtitleStreamController, [{
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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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// Remove all queued items and create a new, empty queue for each track.
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}, {
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key: 'clearVttFragQueues',
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value: function clearVttFragQueues() {
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var _this2 = this;
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this.vttFragQueues = {};
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this.tracks.forEach(function (track) {
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_this2.vttFragQueues[track.id] = [];
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});
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}
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// If no frag is being processed and queue isn't empty, initiate processing of next frag in line.
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}, {
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key: 'nextFrag',
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value: function nextFrag() {
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if (this.currentlyProcessing === null && this.currentTrackId > -1 && this.vttFragQueues[this.currentTrackId].length) {
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var frag = this.currentlyProcessing = this.vttFragQueues[this.currentTrackId].shift();
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this.hls.trigger(_events2.default.FRAG_LOADING, { frag: frag });
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}
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}
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// When fragment has finished processing, add sn to list of completed if successful.
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}, {
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key: 'onSubtitleFragProcessed',
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value: function onSubtitleFragProcessed(data) {
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if (data.success) {
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this.vttFragSNsProcessed[data.frag.trackId].push(data.frag.sn);
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}
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this.currentlyProcessing = null;
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this.nextFrag();
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}
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// If something goes wrong, procede to next frag, if we were processing one.
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}, {
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key: 'onError',
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value: function onError(data) {
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var frag = data.frag;
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// don't handle frag error not related to subtitle fragment
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if (frag && frag.type !== 'subtitle') {
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return;
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}
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if (this.currentlyProcessing) {
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this.currentlyProcessing = null;
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this.nextFrag();
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}
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}
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// Got all new subtitle tracks.
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}, {
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key: 'onSubtitleTracksUpdated',
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value: function onSubtitleTracksUpdated(data) {
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var _this3 = this;
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_logger.logger.log('subtitle tracks updated');
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this.tracks = data.subtitleTracks;
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this.clearVttFragQueues();
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this.vttFragSNsProcessed = {};
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this.tracks.forEach(function (track) {
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_this3.vttFragSNsProcessed[track.id] = [];
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});
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}
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}, {
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key: 'onSubtitleTrackSwitch',
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value: function onSubtitleTrackSwitch(data) {
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this.currentTrackId = data.id;
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this.clearVttFragQueues();
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}
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// Got a new set of subtitle fragments.
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}, {
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key: 'onSubtitleTrackLoaded',
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value: function onSubtitleTrackLoaded(data) {
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var processedFragSNs = this.vttFragSNsProcessed[data.id],
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fragQueue = this.vttFragQueues[data.id],
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currentFragSN = !!this.currentlyProcessing ? this.currentlyProcessing.sn : -1;
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var alreadyProcessed = function alreadyProcessed(frag) {
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return processedFragSNs.indexOf(frag.sn) > -1;
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};
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var alreadyInQueue = function alreadyInQueue(frag) {
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return fragQueue.some(function (fragInQueue) {
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return fragInQueue.sn === frag.sn;
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});
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};
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// Add all fragments that haven't been, aren't currently being and aren't waiting to be processed, to queue.
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data.details.fragments.forEach(function (frag) {
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if (!(alreadyProcessed(frag) || frag.sn === currentFragSN || alreadyInQueue(frag))) {
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// Frags don't know their subtitle track ID, so let's just add that...
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frag.trackId = data.id;
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fragQueue.push(frag);
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}
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});
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this.nextFrag();
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}
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}]);
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return SubtitleStreamController;
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}(_eventHandler2.default);
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exports.default = SubtitleStreamController; |