streaming_controllers_MediaSourceController.js
/**
* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and contributor
* rights, including patent rights, and no such rights are granted under this license.
*
* Copyright (c) 2013, Dash Industry Forum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * Neither the name of Dash Industry Forum nor the names of its
* contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
import FactoryMaker from '../../core/FactoryMaker';
import Debug from '../../core/Debug';
import EventBus from '../../core/EventBus';
import MediaPlayerEvents from '../MediaPlayerEvents';
function MediaSourceController() {
let instance,
mediaSource,
settings,
mediaSourceType,
logger;
const context = this.context;
const eventBus = EventBus(context).getInstance();
function setup() {
logger = Debug(context).getInstance().getLogger(instance);
}
function createMediaSource() {
let hasWebKit = ('WebKitMediaSource' in window);
let hasMediaSource = ('MediaSource' in window);
let hasManagedMediaSource = ('ManagedMediaSource' in window);
if (hasManagedMediaSource) {
// eslint-disable-next-line no-undef
mediaSource = new ManagedMediaSource();
mediaSourceType = 'managedMediaSource';
logger.info(`Created ManagedMediaSource`)
} else if (hasMediaSource) {
mediaSource = new MediaSource();
mediaSourceType = 'mediaSource';
logger.info(`Created MediaSource`)
} else if (hasWebKit) {
mediaSource = new WebKitMediaSource();
logger.info(`Created WebkitMediaSource`)
}
return mediaSource;
}
function attachMediaSource(videoModel) {
let objectURL = window.URL.createObjectURL(mediaSource);
videoModel.setSource(objectURL);
if (mediaSourceType === 'managedMediaSource') {
videoModel.setDisableRemotePlayback(true);
mediaSource.addEventListener('startstreaming', () => {
eventBus.trigger(MediaPlayerEvents.MANAGED_MEDIA_SOURCE_START_STREAMING)
})
mediaSource.addEventListener('endstreaming', () => {
eventBus.trigger(MediaPlayerEvents.MANAGED_MEDIA_SOURCE_END_STREAMING)
})
}
return objectURL;
}
function detachMediaSource(videoModel) {
videoModel.setSource(null);
}
function setDuration(value) {
if (!mediaSource || mediaSource.readyState !== 'open') return;
if (value === null && isNaN(value)) return;
if (mediaSource.duration === value) return;
if (value === Infinity && !settings.get().streaming.buffer.mediaSourceDurationInfinity) {
value = Math.pow(2, 32);
}
if (!isBufferUpdating(mediaSource)) {
logger.info('Set MediaSource duration:' + value);
mediaSource.duration = value;
} else {
setTimeout(setDuration.bind(null, value), 50);
}
}
function setSeekable(start, end) {
if (mediaSource && typeof mediaSource.setLiveSeekableRange === 'function' && typeof mediaSource.clearLiveSeekableRange === 'function' &&
mediaSource.readyState === 'open' && start >= 0 && start < end) {
mediaSource.clearLiveSeekableRange();
mediaSource.setLiveSeekableRange(start, end);
}
}
function signalEndOfStream(source) {
if (!source || source.readyState !== 'open') {
return;
}
let buffers = source.sourceBuffers;
for (let i = 0; i < buffers.length; i++) {
if (buffers[i].updating) {
return;
}
if (buffers[i].buffered.length === 0) {
return;
}
}
logger.info('call to mediaSource endOfStream');
source.endOfStream();
}
function isBufferUpdating(source) {
let buffers = source.sourceBuffers;
for (let i = 0; i < buffers.length; i++) {
if (buffers[i].updating) {
return true;
}
}
return false;
}
/**
* Set the config of the MediaSourceController
* @param {object} config
*/
function setConfig(config) {
if (!config) {
return;
}
if (config.settings) {
settings = config.settings;
}
}
instance = {
attachMediaSource,
createMediaSource,
detachMediaSource,
setConfig,
setDuration,
setSeekable,
signalEndOfStream,
};
setup();
return instance;
}
MediaSourceController.__dashjs_factory_name = 'MediaSourceController';
export default FactoryMaker.getSingletonFactory(MediaSourceController);