Function skipStRefPicSet

src/codec_data.ts:671–718

(
	bitstream: Bitstream,
	stRpsIdx: number,
	num_short_term_ref_pic_sets: number,
	NumDeltaPocs: number[],
)

};

const skipStRefPicSet = (
	bitstream: Bitstream,
	stRpsIdx: number,
	num_short_term_ref_pic_sets: number,
	NumDeltaPocs: number[],
) => {
	let NumDeltaPocsThis = 0;
	let inter_ref_pic_set_prediction_flag = 0;
	let RefRpsIdx = 0;

	if (stRpsIdx !== 0) {
		inter_ref_pic_set_prediction_flag = bitstream.readBits(1);
	}
	if (inter_ref_pic_set_prediction_flag) {
		if (stRpsIdx === num_short_term_ref_pic_sets) {
			const delta_idx_minus1 = readExpGolomb(bitstream);
			RefRpsIdx = stRpsIdx - (delta_idx_minus1 + 1);
		} else {
			RefRpsIdx = stRpsIdx - 1;
		}
		bitstream.readBits(1); // delta_rps_sign
		readExpGolomb(bitstream); // abs_delta_rps_minus1

		// The number of iterations is NumDeltaPocs[RefRpsIdx] + 1
		const numDelta = NumDeltaPocs[RefRpsIdx] ?? 0;
		for (let j = 0; j <= numDelta; j++) {
			const used_by_curr_pic_flag = bitstream.readBits(1);
			if (!used_by_curr_pic_flag) {
				bitstream.readBits(1); // use_delta_flag
			}
		}
		NumDeltaPocsThis = NumDeltaPocs[RefRpsIdx]!;
	} else {
		const num_negative_pics = readExpGolomb(bitstream);
		const num_positive_pics = readExpGolomb(bitstream);

		for (let i = 0; i < num_negative_pics; i++) {
			readExpGolomb(bitstream); // delta_poc_s0_minus1[i]
			bitstream.readBits(1); // used_by_curr_pic_s0_flag[i]
		}
		for (let i = 0; i < num_positive_pics; i++) {
			readExpGolomb(bitstream); // delta_poc_s1_minus1[i]
			bitstream.readBits(1); // used_by_curr_pic_s1_flag[i]
		}
		NumDeltaPocsThis = num_negative_pics + num_positive_pics;
	}
	return NumDeltaPocsThis;
};

const parseVuiForMinSpatialSegmentationIdc = (bitstream: Bitstream, sps_max_sub_layers_minus1: number) => {
	if (bitstream.readBits(1)) { // aspect_ratio_info_present_flag