108 lines
6.1 KiB
JavaScript
108 lines
6.1 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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* FPS Controller
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*/
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var FPSController = function (_EventHandler) {
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_inherits(FPSController, _EventHandler);
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function FPSController(hls) {
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_classCallCheck(this, FPSController);
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return _possibleConstructorReturn(this, (FPSController.__proto__ || Object.getPrototypeOf(FPSController)).call(this, hls, _events2.default.MEDIA_ATTACHING));
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}
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_createClass(FPSController, [{
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key: 'destroy',
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value: function destroy() {
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if (this.timer) {
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clearInterval(this.timer);
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}
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this.isVideoPlaybackQualityAvailable = false;
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}
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}, {
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key: 'onMediaAttaching',
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value: function onMediaAttaching(data) {
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var config = this.hls.config;
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if (config.capLevelOnFPSDrop) {
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var video = this.video = data.media instanceof HTMLVideoElement ? data.media : null;
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if (typeof video.getVideoPlaybackQuality === 'function') {
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this.isVideoPlaybackQualityAvailable = true;
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}
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clearInterval(this.timer);
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this.timer = setInterval(this.checkFPSInterval.bind(this), config.fpsDroppedMonitoringPeriod);
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}
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}
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}, {
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key: 'checkFPS',
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value: function checkFPS(video, decodedFrames, droppedFrames) {
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var currentTime = performance.now();
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if (decodedFrames) {
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if (this.lastTime) {
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var currentPeriod = currentTime - this.lastTime,
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currentDropped = droppedFrames - this.lastDroppedFrames,
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currentDecoded = decodedFrames - this.lastDecodedFrames,
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droppedFPS = 1000 * currentDropped / currentPeriod,
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hls = this.hls;
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hls.trigger(_events2.default.FPS_DROP, { currentDropped: currentDropped, currentDecoded: currentDecoded, totalDroppedFrames: droppedFrames });
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if (droppedFPS > 0) {
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//logger.log('checkFPS : droppedFPS/decodedFPS:' + droppedFPS/(1000 * currentDecoded / currentPeriod));
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if (currentDropped > hls.config.fpsDroppedMonitoringThreshold * currentDecoded) {
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var currentLevel = hls.currentLevel;
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_logger.logger.warn('drop FPS ratio greater than max allowed value for currentLevel: ' + currentLevel);
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if (currentLevel > 0 && (hls.autoLevelCapping === -1 || hls.autoLevelCapping >= currentLevel)) {
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currentLevel = currentLevel - 1;
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hls.trigger(_events2.default.FPS_DROP_LEVEL_CAPPING, { level: currentLevel, droppedLevel: hls.currentLevel });
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hls.autoLevelCapping = currentLevel;
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hls.streamController.nextLevelSwitch();
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}
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}
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}
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}
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this.lastTime = currentTime;
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this.lastDroppedFrames = droppedFrames;
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this.lastDecodedFrames = decodedFrames;
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}
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}
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}, {
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key: 'checkFPSInterval',
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value: function checkFPSInterval() {
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var video = this.video;
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if (video) {
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if (this.isVideoPlaybackQualityAvailable) {
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var videoPlaybackQuality = video.getVideoPlaybackQuality();
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this.checkFPS(video, videoPlaybackQuality.totalVideoFrames, videoPlaybackQuality.droppedVideoFrames);
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} else {
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this.checkFPS(video, video.webkitDecodedFrameCount, video.webkitDroppedFrameCount);
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}
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}
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}
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}]);
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return FPSController;
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}(_eventHandler2.default);
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exports.default = FPSController;
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