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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 Errors from '../../core/errors/Errors.js';
import EventBus from '../../core/EventBus.js';
import Events from '../../core/events/Events.js';
import BlacklistController from '../controllers/BlacklistController.js';
import DVBSelector from './baseUrlResolution/DVBSelector.js';
import BasicSelector from './baseUrlResolution/BasicSelector.js';
import FactoryMaker from '../../core/FactoryMaker.js';
import DashJSError from '../vo/DashJSError.js';
import {checkParameterType} from './SupervisorTools.js';
import ContentSteeringSelector from './baseUrlResolution/ContentSteeringSelector.js';
import Settings from '../../core/Settings.js';
function BaseURLSelector() {
const context = this.context;
const eventBus = EventBus(context).getInstance();
const settings = Settings(context).getInstance();
let instance,
serviceLocationBlacklistController,
basicSelector,
dvbSelector,
contentSteeringSelector,
selector;
function setup() {
serviceLocationBlacklistController = BlacklistController(context).create({
updateEventName: Events.SERVICE_LOCATION_BASE_URL_BLACKLIST_CHANGED,
addBlacklistEventName: Events.SERVICE_LOCATION_BASE_URL_BLACKLIST_ADD
});
basicSelector = BasicSelector(context).create({
blacklistController: serviceLocationBlacklistController
});
dvbSelector = DVBSelector(context).create({
blacklistController: serviceLocationBlacklistController
});
contentSteeringSelector = ContentSteeringSelector(context).create();
contentSteeringSelector.setConfig({
blacklistController: serviceLocationBlacklistController,
addBlacklistEventName: Events.SERVICE_LOCATION_BASE_URL_BLACKLIST_ADD
})
selector = basicSelector;
}
function setConfig(config) {
if (config.selector) {
selector = config.selector;
}
if (config.contentSteeringSelector) {
contentSteeringSelector = config.contentSteeringSelector;
}
}
function chooseSelector(isDVB) {
checkParameterType(isDVB, 'boolean');
selector = isDVB ? dvbSelector : basicSelector;
}
function select(data) {
if (!data) {
return;
}
// Check if we got any instructions from the content steering element in the MPD or from the content steering server
if (settings.get().streaming.applyContentSteering) {
const steeringIndex = contentSteeringSelector.selectBaseUrlIndex(data);
Iif (!isNaN(steeringIndex) && steeringIndex !== -1) {
data.selectedIdx = steeringIndex;
}
}
// Once a random selection has been carried out amongst a group of BaseURLs with the same
// @priority attribute value, then that choice should be re-used if the selection needs to be made again
// unless the blacklist has been modified or the available BaseURLs have changed.
Iif (!isNaN(data.selectedIdx)) {
return data.baseUrls[data.selectedIdx];
}
let selectedBaseUrl = selector.select(data.baseUrls);
if (!selectedBaseUrl) {
eventBus.trigger(Events.URL_RESOLUTION_FAILED, {
error: new DashJSError(
Errors.URL_RESOLUTION_FAILED_GENERIC_ERROR_CODE,
Errors.URL_RESOLUTION_FAILED_GENERIC_ERROR_MESSAGE
)
});
Iif (selector === basicSelector) {
reset();
}
return;
}
data.selectedIdx = data.baseUrls.indexOf(selectedBaseUrl);
return selectedBaseUrl;
}
function reset() {
contentSteeringSelector.reset();
serviceLocationBlacklistController.reset();
}
instance = {
chooseSelector: chooseSelector,
select: select,
reset: reset,
setConfig: setConfig
};
setup();
return instance;
}
BaseURLSelector.__dashjs_factory_name = 'BaseURLSelector';
export default FactoryMaker.getClassFactory(BaseURLSelector);
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