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* 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 EventBus from '../../core/EventBus.js';
import Events from '../../core/events/Events.js';
import FactoryMaker from '../../core/FactoryMaker.js';
import InitCache from '../utils/InitCache.js';
import SourceBufferSink from '../SourceBufferSink.js';
import DashJSError from '../../streaming/vo/DashJSError.js';
import Errors from '../../core/errors/Errors.js';
const BUFFER_CONTROLLER_TYPE = 'NotFragmentedTextBufferController';
function NotFragmentedTextBufferController(config) {
config = config || {};
const context = this.context;
const eventBus = EventBus(context).getInstance();
const textController = config.textController;
const errHandler = config.errHandler;
const streamInfo = config.streamInfo;
const type = config.type;
let instance,
isBufferingCompleted,
initialized,
mediaSource,
sourceBufferSink,
initCache;
function setup() {
initialized = false;
mediaSource = null;
isBufferingCompleted = false;
initCache = InitCache(context).getInstance();
eventBus.on(Events.INIT_FRAGMENT_LOADED, _onInitFragmentLoaded, instance);
}
function getBufferControllerType() {
return BUFFER_CONTROLLER_TYPE;
}
function initialize(source) {
setMediaSource(source);
}
function createBufferSink(mediaInfo) {
return new Promise((resolve, reject) => {
try {
sourceBufferSink = SourceBufferSink(context).create({ mediaSource, textController, eventBus });
sourceBufferSink.initializeForFirstUse(mediaInfo);
if (!initialized) {
Iif (sourceBufferSink.getBuffer() && typeof sourceBufferSink.getBuffer().initialize === 'function') {
sourceBufferSink.getBuffer().initialize();
}
initialized = true;
}
resolve(sourceBufferSink);
} catch (e) {
errHandler.error(new DashJSError(Errors.MEDIASOURCE_TYPE_UNSUPPORTED_CODE, Errors.MEDIASOURCE_TYPE_UNSUPPORTED_MESSAGE + type));
reject(e);
}
});
}
function getStreamId() {
return streamInfo.id;
}
function getType() {
return type;
}
function getBuffer() {
return sourceBufferSink;
}
function setMediaSource(value) {
mediaSource = value;
}
function getMediaSource() {
return mediaSource;
}
function getIsPruningInProgress() {
return false;
}
function dischargePreBuffer() {
}
function getBufferLevel() {
return 0;
}
function getIsBufferingCompleted() {
return isBufferingCompleted;
}
function setIsBufferingCompleted(value) {
Iif (isBufferingCompleted === value) {
return;
}
isBufferingCompleted = value;
if (isBufferingCompleted) {
triggerEvent(Events.BUFFERING_COMPLETED);
}
}
function reset(errored) {
eventBus.off(Events.INIT_FRAGMENT_LOADED, _onInitFragmentLoaded, instance);
if (!errored && sourceBufferSink) {
sourceBufferSink.abort();
sourceBufferSink.reset();
sourceBufferSink = null;
}
}
function appendInitSegmentFromCache(representationId) {
// If text data file already in cache then no need to append it again
return initCache.extract(streamInfo.id, representationId) !== null;
}
function _onInitFragmentLoaded(e) {
if (!e.chunk.bytes || isBufferingCompleted) {
return;
}
initCache.save(e.chunk);
sourceBufferSink.append(e.chunk);
setIsBufferingCompleted(true);
}
function getRangeAt() {
return null;
}
function hasBufferAtTime() {
return true;
}
function getAllRangesWithSafetyFactor() {
return [];
}
function getContinuousBufferTimeForTargetTime() {
return Number.POSITIVE_INFINITY;
}
function clearBuffers() {
return Promise.resolve();
}
function pruneBuffer() {
return;
}
function updateBufferTimestampOffset() {
return Promise.resolve();
}
function prepareForPlaybackSeek() {
return Promise.resolve();
}
function prepareForReplacementTrackSwitch() {
isBufferingCompleted = false;
return Promise.resolve();
}
function updateAppendWindow() {
return Promise.resolve();
}
function setSeekTarget() {
}
function segmentRequestingCompleted() {
}
function pruneAllSafely() {
return Promise.resolve();
}
function triggerEvent(eventType, data) {
let payload = data || {};
eventBus.trigger(eventType, payload, { streamId: streamInfo.id, mediaType: type });
}
instance = {
initialize,
getStreamId,
getType,
getBufferControllerType,
createBufferSink,
dischargePreBuffer,
getBuffer,
getBufferLevel,
getRangeAt,
pruneBuffer,
hasBufferAtTime,
getAllRangesWithSafetyFactor,
getContinuousBufferTimeForTargetTime,
setMediaSource,
getMediaSource,
appendInitSegmentFromCache,
getIsBufferingCompleted,
setIsBufferingCompleted,
getIsPruningInProgress,
reset,
clearBuffers,
prepareForPlaybackSeek,
prepareForReplacementTrackSwitch,
setSeekTarget,
updateAppendWindow,
pruneAllSafely,
updateBufferTimestampOffset,
segmentRequestingCompleted
};
setup();
return instance;
}
NotFragmentedTextBufferController.__dashjs_factory_name = BUFFER_CONTROLLER_TYPE;
export default FactoryMaker.getClassFactory(NotFragmentedTextBufferController);
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