mp4box/src/parsing/tfra.js

JavaScript version of GPAC's MP4Box tool

BoxParser.createFullBoxCtor("tfra", "TrackFragmentRandomAccessBox", function(stream) {
	this.track_ID = stream.readUint32();
	stream.readUint24();
	var tmp_byte = stream.readUint8();
	this.length_size_of_traf_num = (tmp_byte >> 4) & 0x3;
	this.length_size_of_trun_num = (tmp_byte >> 2) & 0x3;
	this.length_size_of_sample_num = (tmp_byte) & 0x3;
	this.entries = [];
	var number_of_entries = stream.readUint32();
	for (var i = 0; i < number_of_entries; i++) {
		if (this.version === 1) {
			this.time = stream.readUint64();
			this.moof_offset = stream.readUint64();
		} else {
			this.time = stream.readUint32();
			this.moof_offset = stream.readUint32();
		}
		this.traf_number = stream["readUint"+(8*(this.length_size_of_traf_num+1))]();
		this.trun_number = stream["readUint"+(8*(this.length_size_of_trun_num+1))]();
		this.sample_number = stream["readUint"+(8*(this.length_size_of_sample_num+1))]();
	}
});