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fix(webcodec): fix a h265 header parsing issue

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This commit is contained in:
Simon Chan 2023-09-25 16:37:40 +08:00
parent e7827b011a
commit 85d082f9e7
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GPG key ID: A8B69F750B9BCEDD
1 changed files with 26 additions and 17 deletions
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35
libraries/scrcpy/src/codec/h265.ts
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@ -14,6 +14,9 @@
// cspell: ignore texmc
// cspell: ignore rbsp
// cspell: ignore cprms
// cspell: ignore nalu
// cspell: ignore sodb
// cspell: ignore luma
import { NaluSodbBitReader, annexBSplitNalu } from "./nalu.js";
@ -275,9 +278,9 @@ export function h265ParseSequenceParameterSet(nalu: Uint8Array) {
const log2_max_pic_order_cnt_lsb_minus4 =
reader.decodeExponentialGolombNumber();
let sps_max_dec_pic_buffering_minus1: number[] | undefined;
let sps_max_num_reorder_pics: number[] | undefined;
let sps_max_latency_increase_plus1: number[] | undefined;
const sps_max_dec_pic_buffering_minus1: number[] = [];
const sps_max_num_reorder_pics: number[] = [];
const sps_max_latency_increase_plus1: number[] = [];
const sps_sub_layer_ordering_info_present_flag = !!reader.next();
for (
let i = sps_sub_layer_ordering_info_present_flag
@ -286,18 +289,12 @@ export function h265ParseSequenceParameterSet(nalu: Uint8Array) {
i <= sps_max_sub_layers_minus1;
i += 1
) {
sps_max_dec_pic_buffering_minus1 = [];
sps_max_num_reorder_pics = [];
sps_max_latency_increase_plus1 = [];
for (let i = 0; i <= sps_max_sub_layers_minus1; i += 1) {
sps_max_dec_pic_buffering_minus1[i] =
reader.decodeExponentialGolombNumber();
sps_max_num_reorder_pics[i] =
reader.decodeExponentialGolombNumber();
sps_max_num_reorder_pics[i] = reader.decodeExponentialGolombNumber();
sps_max_latency_increase_plus1[i] =
reader.decodeExponentialGolombNumber();
}
}
const log2_min_luma_coding_block_size_minus3 =
reader.decodeExponentialGolombNumber();
@ -370,7 +367,10 @@ export function h265ParseSequenceParameterSet(nalu: Uint8Array) {
const vui_parameters_present_flag = !!reader.next();
let vuiParameters: H265VuiParameters | undefined;
if (vui_parameters_present_flag) {
vuiParameters = h265ParseVuiParameters(reader);
vuiParameters = h265ParseVuiParameters(
reader,
sps_max_sub_layers_minus1,
);
}
const sps_extension_present_flag = !!reader.next();
@ -897,7 +897,10 @@ export function h265ParseShortTermReferencePictureSet(
/**
* E.2.1 VUI parameters syntax
*/
export function h265ParseVuiParameters(reader: NaluSodbBitReader) {
export function h265ParseVuiParameters(
reader: NaluSodbBitReader,
sps_max_sub_layers_minus1: number,
) {
const aspect_ratio_info_present_flag = !!reader.next();
let aspect_ratio_idc: number | undefined;
let sar_width: number | undefined;
@ -966,6 +969,7 @@ export function h265ParseVuiParameters(reader: NaluSodbBitReader) {
let vui_poc_proportional_to_timing_flag: boolean | undefined;
let vui_num_ticks_poc_diff_one_minus1: number | undefined;
let vui_hrd_parameters_present_flag: boolean | undefined;
let vui_hrd_parameters: H265HrdParameters | undefined;
if (vui_timing_info_present_flag) {
vui_num_units_in_tick = reader.read(32);
vui_time_scale = reader.read(32);
@ -976,7 +980,11 @@ export function h265ParseVuiParameters(reader: NaluSodbBitReader) {
}
vui_hrd_parameters_present_flag = !!reader.next();
if (vui_hrd_parameters_present_flag) {
throw new Error("Not implemented");
vui_hrd_parameters = h265ParseHrdParameters(
reader,
true,
sps_max_sub_layers_minus1,
);
}
}
@ -1037,6 +1045,7 @@ export function h265ParseVuiParameters(reader: NaluSodbBitReader) {
vui_poc_proportional_to_timing_flag,
vui_num_ticks_poc_diff_one_minus1,
vui_hrd_parameters_present_flag,
vui_hrd_parameters,
bitstream_restriction_flag,
tiles_fixed_structure_flag,