mp4box/src/parsing/leva.js

JavaScript version of GPAC's MP4Box tool

BoxParser.createFullBoxCtor("leva", "LevelAssignmentBox", function(stream) {
	var count = stream.readUint8();
	this.levels = [];
	for (var i = 0; i < count; i++) {
		var level = {};
		this.levels[i] = level;
		level.track_ID = stream.readUint32();
		var tmp_byte = stream.readUint8();
		level.padding_flag = tmp_byte >> 7;
		level.assignment_type = tmp_byte & 0x7F;
		switch (level.assignment_type) {
			case 0:
				level.grouping_type = stream.readString(4);
				break;
			case 1:
				level.grouping_type = stream.readString(4);
				level.grouping_type_parameter = stream.readUint32();
				break;
			case 2:
				break;
			case 3:
				break;
			case 4:
				level.sub_track_id = stream.readUint32();
				break;
			default:
				Log.warn("BoxParser", "Unknown leva assignement type");
		}
	}
});