rx-player
Version:
Canal+ HTML5 Video Player
109 lines (108 loc) • 4.96 kB
JavaScript
/**
* Copyright 2015 CANAL+ Group
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { assertUnreachable } from "../../../../utils/assert";
import isNullOrUndefined from "../../../../utils/is_null_or_undefined";
import parseMpdIr from "../common";
import { createMPDIntermediateRepresentation } from "./node_parsers/MPD";
import { createPeriodIntermediateRepresentation } from "./node_parsers/Period";
/**
* Parse MPD through the JS parser, on a `Document` instance.
* @param {Document} document - Original manifest as returned by the server
* @param {Object} args - Various parsing options and information.
* @returns {Object} - Response returned by the DASH-JS parser.
*/
export default function parseFromDocument(document, args) {
const root = document.documentElement;
if (isNullOrUndefined(root) || root.nodeName !== "MPD") {
throw new Error("DASH Parser: document root should be MPD");
}
const [mpdIR, warnings] = createMPDIntermediateRepresentation(root);
const ret = parseMpdIr(mpdIR, args, warnings);
return processReturn(ret);
/**
* Handle `parseMpdIr` return values, asking for resources if they are needed
* and pre-processing them before continuing parsing.
*
* @param {Object} initialRes
* @returns {Object}
*/
function processReturn(initialRes) {
if (initialRes.type === "done") {
return initialRes;
}
else if (initialRes.type === "needs-clock") {
return {
type: "needs-resources",
value: {
urls: [initialRes.value.url],
format: "string",
continue(loadedClock) {
if (loadedClock.length !== 1) {
throw new Error("DASH parser: wrong number of loaded ressources.");
}
const newRet = initialRes.value.continue(loadedClock[0].responseData);
return processReturn(newRet);
},
},
};
}
else if (initialRes.type === "needs-xlinks") {
return {
type: "needs-resources",
value: {
urls: initialRes.value.xlinksUrls,
format: "string",
continue(loadedXlinks) {
const resourceInfos = [];
for (let i = 0; i < loadedXlinks.length; i++) {
const { responseData: xlinkResp, receivedTime, sendingTime, url, } = loadedXlinks[i];
if (!xlinkResp.success) {
throw xlinkResp.error;
}
const wrappedData = "<root>" + xlinkResp.data + "</root>";
const dataAsXML = new DOMParser().parseFromString(wrappedData, "text/xml");
if (isNullOrUndefined(dataAsXML) || dataAsXML.children.length === 0) {
throw new Error("DASH parser: Invalid external ressources");
}
const periods = dataAsXML.children[0].children;
const periodsIR = [];
const periodsIRWarnings = [];
for (let j = 0; j < periods.length; j++) {
if (periods[j].nodeType === Node.ELEMENT_NODE) {
const [periodIR, periodWarnings] = createPeriodIntermediateRepresentation(periods[j]);
periodsIRWarnings.push(...periodWarnings);
periodsIR.push(periodIR);
}
}
resourceInfos.push({
url,
receivedTime,
sendingTime,
parsed: periodsIR,
warnings: periodsIRWarnings,
});
}
const newRet = initialRes.value.continue(resourceInfos);
return processReturn(newRet);
},
},
};
}
else {
assertUnreachable(initialRes);
}
}
}