@l5i/dashjs
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A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
32 lines (31 loc) • 5.28 kB
JavaScript
/**
* 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.
*/'use strict';Object.defineProperty(exports,'__esModule',{value:true});function _interopRequireDefault(obj){return obj && obj.__esModule?obj:{'default':obj};}function _classCallCheck(instance,Constructor){if(!(instance instanceof Constructor)){throw new TypeError('Cannot call a class as a function');}}var _utilsObjectUtils=require('../utils/ObjectUtils');var _utilsObjectUtils2=_interopRequireDefault(_utilsObjectUtils);var _coreFactoryMaker=require('../../core/FactoryMaker');var _coreFactoryMaker2=_interopRequireDefault(_coreFactoryMaker);var DEFAULT_INDEX=NaN;var Node=function Node(_baseUrls,_selectedIdx){_classCallCheck(this,Node);this.data = {baseUrls:_baseUrls || null,selectedIdx:_selectedIdx || DEFAULT_INDEX};this.children = [];};function BaseURLTreeModel(){var instance=undefined,root=undefined,dashManifestModel=undefined;var context=this.context;var objectUtils=(0,_utilsObjectUtils2['default'])(context).getInstance();function setup(){reset();}function setConfig(config){if(config.dashManifestModel){dashManifestModel = config.dashManifestModel;}}function checkSetConfigCall(){if(!dashManifestModel || !dashManifestModel.hasOwnProperty('getBaseURLsFromElement') || !dashManifestModel.hasOwnProperty('getRepresentationSortFunction')){throw new Error('setConfig function has to be called previously');}}function updateChildData(node,index,element){var baseUrls=dashManifestModel.getBaseURLsFromElement(element);if(!node[index]){node[index] = new Node(baseUrls);}else {if(!objectUtils.areEqual(baseUrls,node[index].data.baseUrls)){node[index].data.baseUrls = baseUrls;node[index].data.selectedIdx = DEFAULT_INDEX;}}}function getBaseURLCollectionsFromManifest(manifest){checkSetConfigCall();var baseUrls=dashManifestModel.getBaseURLsFromElement(manifest);if(!objectUtils.areEqual(baseUrls,root.data.baseUrls)){root.data.baseUrls = baseUrls;root.data.selectedIdx = DEFAULT_INDEX;}if(manifest && manifest.Period_asArray){manifest.Period_asArray.forEach(function(p,pi){updateChildData(root.children,pi,p);if(p.AdaptationSet_asArray){p.AdaptationSet_asArray.forEach(function(a,ai){updateChildData(root.children[pi].children,ai,a);if(a.Representation_asArray){a.Representation_asArray.sort(dashManifestModel.getRepresentationSortFunction()).forEach(function(r,ri){updateChildData(root.children[pi].children[ai].children,ri,r);});}});}});}}function walk(callback,node){var target=node || root;callback(target.data);if(target.children){target.children.forEach(function(child){return walk(callback,child);});}}function invalidateSelectedIndexes(serviceLocation){walk(function(data){if(!isNaN(data.selectedIdx)){if(serviceLocation === data.baseUrls[data.selectedIdx].serviceLocation){data.selectedIdx = DEFAULT_INDEX;}}});}function update(manifest){getBaseURLCollectionsFromManifest(manifest);}function reset(){root = new Node();}function getForPath(path){var target=root;var nodes=[target.data];if(path){path.forEach(function(p){target = target.children[p];if(target){nodes.push(target.data);}});}return nodes.filter(function(n){return n.baseUrls.length;});}instance = {reset:reset,update:update,getForPath:getForPath,invalidateSelectedIndexes:invalidateSelectedIndexes,setConfig:setConfig};setup();return instance;}BaseURLTreeModel.__dashjs_factory_name = 'BaseURLTreeModel';exports['default'] = _coreFactoryMaker2['default'].getClassFactory(BaseURLTreeModel);module.exports = exports['default'];
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