dashjs
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A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
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<h1 class="page-title">Source: offline/controllers/OfflineController.js</h1>
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<pre
class="sunlight-highlight-javascript linenums">/**
* 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 OfflineConstants from '../constants/OfflineConstants';
import OfflineStoreController from './OfflineStoreController';
import OfflineDownload from '../OfflineDownload';
import IndexDBOfflineLoader from '../net/IndexDBOfflineLoader';
import OfflineUrlUtils from '../utils/OfflineUrlUtils';
import OfflineEvents from '../events/OfflineEvents';
import OfflineErrors from '../errors/OfflineErrors';
import OfflineRecord from '../vo/OfflineDownloadVo';
/**
* @module OfflineController
* @param {Object} config - dependencies
* @description Provides access to offline stream recording and playback functionality. This module can be accessed using the MediaPlayer API getOfflineController()
*/
function OfflineController(config) {
const context = this.context;
const errHandler = config.errHandler;
const events = config.events;
const errors = config.errors;
const settings = config.settings;
const eventBus = config.eventBus;
const debug = config.debug;
const manifestLoader = config.manifestLoader;
const manifestModel = config.manifestModel;
const mediaPlayerModel = config.mediaPlayerModel;
const abrController = config.abrController;
const playbackController = config.playbackController;
const dashMetrics = config.dashMetrics;
const timelineConverter = config.timelineConverter;
const segmentBaseController = config.segmentBaseController;
const adapter = config.adapter;
const manifestUpdater = config.manifestUpdater;
const baseURLController = config.baseURLController;
const schemeLoaderFactory = config.schemeLoaderFactory;
const constants = config.constants;
const dashConstants = config.dashConstants;
const urlUtils = config.urlUtils;
let instance,
downloads,
logger,
offlineStoreController,
offlineUrlUtils;
function setup() {
logger = debug.getLogger(instance);
offlineStoreController = OfflineStoreController(context).create({
eventBus: config.eventBus,
errHandler: errHandler
});
offlineUrlUtils = OfflineUrlUtils(context).getInstance();
urlUtils.registerUrlRegex(offlineUrlUtils.getRegex(), offlineUrlUtils);
schemeLoaderFactory.registerLoader(OfflineConstants.OFFLINE_SCHEME, IndexDBOfflineLoader);
downloads = [];
}
/*
---------------------------------------------------------------------------
DOWNLOAD LIST FUNCTIONS
---------------------------------------------------------------------------
*/
function getDownloadFromId(id) {
let download = downloads.find((item) => {
return item.getId() === id;
});
return download;
}
function createDownloadFromId(id) {
let download;
download = getDownloadFromId(id);
if (!download) {
// create download controller
download = OfflineDownload(context).create({
id: id,
eventBus: eventBus,
events: events,
errors: errors,
settings: settings,
manifestLoader: manifestLoader,
manifestModel: manifestModel,
mediaPlayerModel: mediaPlayerModel,
manifestUpdater: manifestUpdater,
baseURLController: baseURLController,
abrController: abrController,
playbackController: playbackController,
adapter: adapter,
dashMetrics: dashMetrics,
timelineConverter: timelineConverter,
errHandler: errHandler,
segmentBaseController: segmentBaseController,
offlineStoreController: offlineStoreController,
debug: debug,
constants: constants,
dashConstants: dashConstants,
urlUtils: urlUtils
});
downloads.push(download);
}
return download;
}
function createDownloadFromStorage(offline) {
let download = getDownloadFromId(offline.manifestId);
if (!download) {
download = createDownloadFromId(offline.manifestId);
let status = offline.status;
if (status === OfflineConstants.OFFLINE_STATUS_STARTED) {
status = OfflineConstants.OFFLINE_STATUS_STOPPED;
}
download.setInitialState({
url: offline.url,
progress: offline.progress,
originalUrl: offline.originalURL,
status: status
});
}
return download;
}
function removeDownloadFromId(id) {
return new Promise(function (resolve, reject) {
let download = getDownloadFromId(id);
let waitForStatusChanged = false;
if (download) {
//is download running?
if (download.isDownloading()) {
//register status changed event
waitForStatusChanged = true;
const downloadStopped = function () {
eventBus.off(events.OFFLINE_RECORD_STOPPED, downloadStopped, instance);
return offlineStoreController.deleteDownloadById(id).then(function () {
resolve();
}).catch(function (err) {
reject(err);
});
};
eventBus.on(events.OFFLINE_RECORD_STOPPED, downloadStopped, instance);
}
download.deleteDownload();
let index = downloads.indexOf(download);
downloads.splice(index, 1);
}
if (!waitForStatusChanged) {
resolve();
}
});
}
function generateManifestId() {
let timestamp = new Date().getTime();
return timestamp;
}
/*
---------------------------------------------------------------------------
OFFLINE CONTROLLER API
---------------------------------------------------------------------------
*/
/**
* Loads records from storage
* This methods has to be called first, to be sure that all downloads have been loaded
*
* @return {Promise} asynchronously resolved
* @memberof module:OfflineController
*/
function loadRecordsFromStorage() {
return new Promise(function (resolve, reject) {
offlineStoreController.getAllManifests().then((items) => {
items.manifests.forEach((offline) => {
createDownloadFromStorage(offline);
});
resolve();
}).catch((e) => {
logger.error('Failed to load downloads ' + e);
reject(e);
});
});
}
/**
* Get all records from storage
*
* @return {Promise} asynchronously resolved with records
* @memberof module:OfflineController
* @instance
*/
function getAllRecords() {
let records = [];
downloads.forEach((download) => {
const record = new OfflineRecord();
record.id = download.getId();
record.progress = download.getDownloadProgression();
record.url = download.getOfflineUrl();
record.originalUrl = download.getManifestUrl();
record.status = download.getStatus();
records.push(record);
});
return records;
}
/**
* Create a new content record in storage and download manifest from url
*
* @param {string} manifestURL - the content manifest url
* @return {Promise} asynchronously resolved with record identifier
* @memberof module:OfflineController
* @instance
*/
function createRecord(manifestURL) {
return new Promise(function (resolve, reject) {
let id = generateManifestId();
// create download controller
let download = createDownloadFromId(id);
download.downloadFromUrl(manifestURL).then(() => {
download.initDownload();
resolve(id);
})
.catch((e) => {
logger.error('Failed to download ' + e);
removeDownloadFromId(id).then(function () {
reject(e);
});
});
});
}
/**
* Start downloading the record with selected tracks representations
*
* @param {string} id - record identifier
* @param {MediaInfo[]} mediaInfos - the selected tracks representations
* @memberof module:OfflineController
* @instance
*/
function startRecord(id, mediaInfos) {
let download = getDownloadFromId(id);
if (download) {
download.startDownload(mediaInfos);
}
}
/**
* Stop downloading of the record
*
* @param {string} id - record identifier
* @memberof module:OfflineController
* @instance
*/
function stopRecord(id) {
let download = getDownloadFromId(id);
if (download) {
download.stopDownload();
}
}
/**
* Resume downloading of the record
*
* @param {string} id - record identifier
* @memberof module:OfflineController
* @instance
*/
function resumeRecord(id) {
let download = getDownloadFromId(id);
if (download) {
download.resumeDownload();
}
}
/**
* Deletes a record from storage
*
* @param {string} id - record identifier
* @memberof module:OfflineController
* @instance
*/
function deleteRecord(id) {
return removeDownloadFromId(id).then(function () {
return offlineStoreController.deleteDownloadById(id);
});
}
/**
* Get download progression of a record
*
* @param {string} id - record identifier
* @return {number} percentage progression
* @memberof module:OfflineController
* @instance
*/
function getRecordProgression(id) {
let download = getDownloadFromId(id);
if (download) {
return download.getDownloadProgression();
}
return 0;
}
/**
* Reset all records
* @memberof module:OfflineController
* @instance
*/
function resetRecords() {
downloads.forEach((download) => {
download.resetDownload();
});
}
/**
* Reset
* @instance
*/
function reset() {
resetRecords();
schemeLoaderFactory.unregisterLoader(OfflineConstants.OFFLINE_SCHEME);
}
instance = {
loadRecordsFromStorage: loadRecordsFromStorage,
createRecord: createRecord,
startRecord: startRecord,
stopRecord: stopRecord,
resumeRecord: resumeRecord,
deleteRecord: deleteRecord,
getRecordProgression: getRecordProgression,
getAllRecords: getAllRecords,
resetRecords: resetRecords,
reset: reset
};
setup();
return instance;
}
OfflineController.__dashjs_factory_name = 'OfflineController';
const factory = dashjs.FactoryMaker.getClassFactory(OfflineController); /* jshint ignore:line */
factory.events = OfflineEvents;
factory.errors = OfflineErrors;
dashjs.FactoryMaker.updateClassFactory(OfflineController.__dashjs_factory_name, factory); /* jshint ignore:line */
export default factory;
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$( "#main span[id^='toc']" ).addClass( "toc-shim" );
$( '.dropdown-toggle' ).dropdown();
$( "table" ).each( function () {
var $this = $( this );
$this.addClass('table');
} );
} );
</script>
<!--Navigation and Symbol Display-->
<script>
$( function () {
$( '#main' ).localScroll( {
offset : { top : 60 } //offset by the height of your header (give or take a few px, see what works for you)
} );
$( "dt.name" ).each( function () {
var $this = $( this ).find("h4");
var icon = $( "<i/>" ).addClass( "icon-plus-sign" ).addClass( "pull-right" ).addClass( "icon-white" );
var dt = $(this);
var children = dt.next( "dd" );
dt.prepend( icon ).css( {cursor : "pointer"} );
dt.addClass( "member-collapsed" ).addClass( "member" );
children.hide();
dt.children().on( "click", function () {
children = dt.next( "dd" );
children.slideToggle( "fast", function () {
if ( children.is( ":visible" ) ) {
icon.addClass( "icon-minus-sign" ).removeClass( "icon-plus-sign" ).removeClass( "icon-white" );
dt.addClass( "member-open" ).animate( "member-collapsed" );
} else {
icon.addClass( "icon-plus-sign" ).removeClass( "icon-minus-sign" ).addClass( "icon-white" );
dt.addClass( "member-collapsed" ).removeClass( "member-open" );
}
} );
} );
} );
} );
</script>
<!--Google Analytics-->
<script type="text/javascript">
$(document).ready(function() {
SearcherDisplay.init();
});
</script>
</body>
</html>