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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 FactoryMaker from '../../core/FactoryMaker.js';
import DashConstants from '../constants/DashConstants.js';
import ObjectIron from './objectiron.js';
import DurationMatcher from './matchers/DurationMatcher.js';
import DateTimeMatcher from './matchers/DateTimeMatcher.js';
import NumericMatcher from './matchers/NumericMatcher.js';
import LangMatcher from './matchers/LangMatcher.js';
import RepresentationBaseValuesMap from './maps/RepresentationBaseValuesMap.js';
import SegmentValuesMap from './maps/SegmentValuesMap.js';
import { parseXml as cmlParseXml } from '@svta/common-media-library/xml/parseXml.js';
// List of node that shall be represented as arrays
const arrayNodes = [
DashConstants.ACCESSIBILITY,
DashConstants.ADAPTATION_SET,
DashConstants.ADD,
DashConstants.AUDIO_CHANNEL_CONFIGURATION,
DashConstants.BASE_URL,
DashConstants.CONTENT_COMPONENT,
DashConstants.CONTENT_PROTECTION,
DashConstants.CONTENT_STEERING,
DashConstants.ESSENTIAL_PROPERTY,
DashConstants.EVENT,
DashConstants.EVENT_STREAM,
DashConstants.INBAND_EVENT_STREAM,
DashConstants.LABEL,
DashConstants.LOCATION,
DashConstants.METRICS,
DashConstants.PATCH_LOCATION,
DashConstants.PERIOD,
DashConstants.PRESELECTION,
DashConstants.PRODUCER_REFERENCE_TIME,
DashConstants.REMOVE,
DashConstants.REPLACE,
DashConstants.REPORTING,
DashConstants.REPRESENTATION,
DashConstants.ROLE,
DashConstants.S,
DashConstants.SEGMENT_SEQUENCE_PROPERTIES,
DashConstants.SEGMENT_URL,
DashConstants.SERVICE_DESCRIPTION,
DashConstants.SUPPLEMENTAL_PROPERTY,
DashConstants.UTC_TIMING,
];
function DashParser(config) {
config = config || {};
const context = this.context;
const debug = config.debug;
let instance,
logger,
matchers,
objectIron;
function setup() {
logger = debug.getLogger(instance);
matchers = [
new DurationMatcher(),
new DateTimeMatcher(),
new NumericMatcher(),
new LangMatcher()
];
objectIron = ObjectIron(context).create({
adaptationset: new RepresentationBaseValuesMap(),
period: new SegmentValuesMap()
});
}
function getIron() {
return objectIron;
}
function parse(data) {
let manifest;
const startTime = window.performance.now();
manifest = parseXml(data);
if (!manifest) {
throw new Error('failed to parse the manifest');
}
// handle full MPD and Patch ironing separately
Iif (manifest.Patch) {
manifest = manifest.Patch; // drop root reference
// apply iron to patch operations individually
if (manifest.add) {
manifest.add.forEach((operand) => objectIron.run(operand));
}
if (manifest.replace) {
manifest.replace.forEach((operand) => objectIron.run(operand));
}
// note that we don't need to iron remove as they contain no children
} else {
manifest = manifest.MPD; // drop root reference
objectIron.run(manifest);
}
const parsedTime = window.performance.now();
logger.info('Parsing complete: ' + (parsedTime - startTime).toPrecision(3) + 'ms');
manifest.protocol = 'DASH';
return manifest;
}
function processXml(data) {
const xml = cmlParseXml(data);
const root = xml.childNodes.find(child => child.nodeName === 'MPD' || child.nodeName === 'Patch') || xml.childNodes[0];
function processNode(node) {
// Convert tag name
let p = node.nodeName.indexOf(':');
Iif (p !== -1) {
node.__prefix = node.prefix;
node.nodeName = node.localName;
}
const { childNodes, attributes, nodeName } = node;
node.tagName = nodeName;
// Convert attributes
for (let k in attributes) {
let value = attributes[k];
Iif (nodeName === 'S') {
value = parseInt(value);
}
else {
for (let i = 0, len = matchers.length; i < len; i++) {
const matcher = matchers[i];
if (matcher.test(nodeName, k, value)) {
value = matcher.converter(value);
break;
}
}
}
node[k] = value;
}
// Convert children
const len = childNodes?.length;
for (let i = 0; i < len; i++) {
const child = childNodes[i];
if (child.nodeName === '#text') {
node.__text = child.nodeValue;
continue;
}
processNode(child);
const { nodeName } = child;
if (Array.isArray(node[nodeName])) {
node[nodeName].push(child);
}
else if (arrayNodes.indexOf(nodeName) !== -1) {
if (!node[nodeName]) {
node[nodeName] = [];
}
node[nodeName].push(child);
} else {
node[nodeName] = child;
}
}
node.__children = childNodes;
}
processNode(root);
return root;
}
function parseXml(data) {
try {
const root = processXml(data);
return {
[root.tagName]: root
};
} catch (e) {
return null;
}
}
instance = {
getIron: getIron,
parseXml: parseXml,
parse: parse
};
setup();
return instance;
}
DashParser.__dashjs_factory_name = 'DashParser';
export default FactoryMaker.getClassFactory(DashParser);
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