rx-player
Version:
Canal+ HTML5 Video Player
88 lines (87 loc) • 2.73 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 { getBoxContent, getBoxesContent } from "./get_box";
/**
* Returns the content of the first "traf" box encountered in the given ISOBMFF
* data.
* Returns null if not found.
* @param {Uint8Array} buffer
* @returns {Uint8Array|null}
*/
function getTRAF(buffer) {
const moof = getBoxContent(buffer, 0x6d6f6f66 /* moof */);
if (moof === null) {
return null;
}
return getBoxContent(moof, 0x74726166 /* traf */);
}
/**
* Returns the content of all "traf" boxes encountered in the given ISOBMFF
* data.
* Might be preferred to just `getTRAF` if you suspect that your ISOBMFF may
* have multiple "moof" boxes.
* @param {Uint8Array} buffer
* @returns {Array.<Uint8Array>}
*/
function getTRAFs(buffer) {
const moofs = getBoxesContent(buffer, 0x6d6f6f66 /* moof */);
return moofs.reduce((acc, moof) => {
const traf = getBoxContent(moof, 0x74726166 /* traf */);
if (traf !== null) {
acc.push(traf);
}
return acc;
}, []);
}
/**
* Returns the content of the first "moof" box encountered in the given ISOBMFF
* data.
* Returns null if not found.
* @param {Uint8Array} buffer
* @returns {Uint8Array|null}
*/
function getMDAT(buf) {
return getBoxContent(buf, 0x6d646174 /* "mdat" */);
}
/**
* Returns the content of the first "mdia" box encountered in the given ISOBMFF
* data.
* Returns null if not found.
* @param {Uint8Array} buffer
* @returns {Uint8Array|null}
*/
function getMDIA(buf) {
const moov = getBoxContent(buf, 0x6d6f6f76 /* moov */);
if (moov === null) {
return null;
}
const trak = getBoxContent(moov, 0x7472616b /* "trak" */);
if (trak === null) {
return null;
}
return getBoxContent(trak, 0x6d646961 /* "mdia" */);
}
/**
* Returns the content of the first "emsg" box encountered in the given ISOBMFF
* data.
* Returns null if not found.
* @param {Uint8Array} buffer
* @returns {Uint8Array|null}
*/
function getEMSG(buffer, offset = 0) {
return getBoxContent(buffer.subarray(offset), 0x656d7367 /* emsg */);
}
export { getTRAF, getTRAFs, getMDAT, getMDIA, getEMSG };