Function parseProfileTierLevel

src/codec_data.ts:599–643

(
	bitstream: Bitstream,
	maxNumSubLayersMinus1: number,
)

};

const parseProfileTierLevel = (
	bitstream: Bitstream,
	maxNumSubLayersMinus1: number,
) => {
	const general_profile_space = bitstream.readBits(2);
	const general_tier_flag = bitstream.readBits(1);
	const general_profile_idc = bitstream.readBits(5);

	let general_profile_compatibility_flags = 0;
	for (let i = 0; i < 32; i++) {
		general_profile_compatibility_flags = (general_profile_compatibility_flags << 1) | bitstream.readBits(1);
	}

	const general_constraint_indicator_flags = new Uint8Array(6);
	for (let i = 0; i < 6; i++) {
		general_constraint_indicator_flags[i] = bitstream.readBits(8);
	}

	const general_level_idc = bitstream.readBits(8);

	const sub_layer_profile_present_flag: number[] = [];
	const sub_layer_level_present_flag: number[] = [];
	for (let i = 0; i < maxNumSubLayersMinus1; i++) {
		sub_layer_profile_present_flag.push(bitstream.readBits(1));
		sub_layer_level_present_flag.push(bitstream.readBits(1));
	}
	if (maxNumSubLayersMinus1 > 0) {
		for (let i = maxNumSubLayersMinus1; i < 8; i++) {
			bitstream.skipBits(2); // reserved_zero_2bits
		}
	}
	for (let i = 0; i < maxNumSubLayersMinus1; i++) {
		if (sub_layer_profile_present_flag[i]) bitstream.skipBits(88);
		if (sub_layer_level_present_flag[i]) bitstream.skipBits(8);
	}

	return {
		general_profile_space,
		general_tier_flag,
		general_profile_idc,
		general_profile_compatibility_flags,
		general_constraint_indicator_flags,
		general_level_idc,
	};
};

const skipScalingListData = (bitstream: Bitstream) => {
	for (let sizeId = 0; sizeId < 4; sizeId++) {