rx-player
Version:
Canal+ HTML5 Video Player
62 lines (61 loc) • 2.3 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 { base64ToBytes } from "../../../utils/base64";
import { concat } from "../../../utils/byte_parsing";
import { hexToBytes } from "../../../utils/string_parsing";
import { getPlayReadyKIDFromPrivateData } from "../../containers/isobmff";
/**
* @param {Uint8Array} keyIdBytes
* @returns {Array.<Object>}
*/
function createWidevineKeySystem(keyIdBytes) {
return [
{
systemId: "edef8ba9-79d6-4ace-a3c8-27dcd51d21ed", // Widevine
privateData: concat([0x08, 0x01, 0x12, 0x10], keyIdBytes),
},
];
}
/**
* Parse "Protection" Node, which contains DRM information
* @param {Element} protectionNode
* @returns {Object}
*/
export default function parseProtectionNode(protectionNode, keySystemCreator = createWidevineKeySystem) {
if (protectionNode.firstElementChild === null ||
protectionNode.firstElementChild.nodeName !== "ProtectionHeader") {
throw new Error("Protection should have ProtectionHeader child");
}
const header = protectionNode.firstElementChild;
const privateData = base64ToBytes(header.textContent === null ? "" : header.textContent);
const keyIdHex = getPlayReadyKIDFromPrivateData(privateData);
const keyIdBytes = hexToBytes(keyIdHex);
// remove possible braces
const systemIdAttr = header.getAttribute("SystemID");
const systemId = (systemIdAttr !== null ? systemIdAttr : "")
.toLowerCase()
.replace(/\{|\}/g, "");
return {
keyId: keyIdBytes,
keySystems: [
{
systemId,
privateData,
/* keyIds: [keyIdBytes], */
},
].concat(keySystemCreator(keyIdBytes)),
};
}