/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.cea.TsCeaParser');
goog.require('shaka.cea.CeaUtils');
goog.require('shaka.cea.SeiProcessor');
goog.require('shaka.media.ClosedCaptionParser');
goog.require('shaka.util.BufferUtils');
goog.require('shaka.util.TsParser');
/**
* MPEG TS CEA parser.
* @implements {shaka.extern.ICeaParser}
* @export
*/
shaka.cea.TsCeaParser = class {
/** */
constructor() {
/**
* SEI data processor.
* @private
* @const {!shaka.cea.SeiProcessor}
*/
this.seiProcessor_ = new shaka.cea.SeiProcessor();
}
/**
* @override
*/
init(initSegment) {
// TS hasn't init segment
}
/**
* @override
*/
parse(mediaSegment) {
const CeaUtils = shaka.cea.CeaUtils;
/** @type {!Array<!shaka.extern.ICeaParser.CaptionPacket>} **/
const captionPackets = [];
const uint8ArrayData = shaka.util.BufferUtils.toUint8(mediaSegment);
if (!shaka.util.TsParser.probe(uint8ArrayData)) {
return captionPackets;
}
const tsParser = new shaka.util.TsParser().parse(uint8ArrayData);
const videoNalus = tsParser.getVideoNalus();
for (const nalu of videoNalus) {
if (nalu.type == CeaUtils.H264_NALU_TYPE_SEI &&
nalu.time != null) {
for (const packet of this.seiProcessor_.process(nalu.data)) {
captionPackets.push({
packet: packet,
pts: nalu.time,
});
}
}
}
return captionPackets;
}
};
shaka.media.ClosedCaptionParser.registerParser('video/mp2t',
() => new shaka.cea.TsCeaParser());