mp4box/src/parsing/samplegroups/avss.js

JavaScript version of GPAC's MP4Box tool

BoxParser.createSampleGroupCtor("avss", function(stream) {
	this.subSequenceIdentifier = stream.readUint16();
	this.layerNumber = stream.readUint8();
	var tmp_byte = stream.readUint8();
	this.durationFlag = tmp_byte >> 7;
	this.avgRateFlag = (tmp_byte >> 6) & 0x1;
	if (this.durationFlag) {
		this.duration = stream.readUint32();
	}
	if (this.avgRateFlag) {
		this.accurateStatisticsFlag = stream.readUint8();
		this.avgBitRate = stream.readUint16();
		this.avgFrameRate = stream.readUint16();
	}
	this.dependency = [];
	var numReferences = stream.readUint8();
	for (var i = 0; i < numReferences; i++) {
		var dependencyInfo = {};
		this.dependency.push(dependencyInfo);
		dependencyInfo.subSeqDirectionFlag = stream.readUint8();
		dependencyInfo.layerNumber = stream.readUint8();
		dependencyInfo.subSequenceIdentifier = stream.readUint16();
	}
});