rx-player
Version:
Canal+ HTML5 Video Player
90 lines (89 loc) • 3.24 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.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = extractCompleteChunks;
exports.extractInitSegment = extractInitSegment;
var byte_parsing_1 = require("../../../utils/byte_parsing");
var find_complete_box_1 = require("./find_complete_box");
/**
* Take a chunk of ISOBMFF data and extract complete `moof`+`mdat` subsegments
* which are ready to be decoded.
* Returns a tuple of two containing first an array of those subsegments
* followed by the last un-decodable part.
* @param {Uint8Array} buffer
* @returns {Array}
*/
function extractCompleteChunks(buffer) {
var _position = 0;
var chunks = [];
var currentBuffer = null;
while (_position <= buffer.length) {
if (_position === buffer.length) {
currentBuffer = null;
break;
}
currentBuffer = buffer.subarray(_position, Infinity);
var moofIndex = (0, find_complete_box_1.default)(currentBuffer, 0x6d6f6f66 /* moof */);
if (moofIndex < 0) {
// no moof, not a media segment.
break;
}
var moofLen = (0, byte_parsing_1.be4toi)(buffer, moofIndex + _position);
var moofEnd = _position + moofIndex + moofLen;
if (moofEnd > buffer.length) {
// not a complete moof segment
break;
}
var mdatIndex = (0, find_complete_box_1.default)(currentBuffer, 0x6d646174 /* mdat */);
if (mdatIndex < 0) {
// no mdat, not a segment.
break;
}
var mdatLen = (0, byte_parsing_1.be4toi)(buffer, mdatIndex + _position);
var mdatEnd = _position + mdatIndex + mdatLen;
if (mdatEnd > buffer.length) {
// not a complete mdat segment
break;
}
var maxEnd = Math.max(moofEnd, mdatEnd);
var chunk = buffer.subarray(_position, maxEnd);
chunks.push(chunk);
_position = maxEnd;
}
if (chunks.length === 0) {
return [null, currentBuffer];
}
return [chunks, currentBuffer];
}
/**
* @param {Uint8Array} buffer
* @returns {Array}
*/
function extractInitSegment(buffer) {
var moovIndex = (0, find_complete_box_1.default)(buffer, 0x6d6f6f76 /* moov */);
if (moovIndex < 0) {
// no moov, not an init segment.
return [null, buffer];
}
var moovLen = (0, byte_parsing_1.be4toi)(buffer, moovIndex);
var moovEnd = moovIndex + moovLen;
if (moovEnd > buffer.length) {
// not a complete moov segment
return [null, buffer];
}
return [buffer.subarray(0, moovEnd), buffer.subarray(moovEnd, Infinity)];
}