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hevc_ps: expose rps fields

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This commit is contained in:
Lynne 2022-12-14 00:25:48 +01:00
parent abdd87d44e
commit f58db8e534
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GPG Key ID: A2FEA5F03F034464
2 changed files with 26 additions and 20 deletions
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39
libavcodec/hevc_ps.c
View File

@ -100,51 +100,50 @@ static void remove_vps(HEVCParamSets *s, int id)
int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header)
{
uint8_t rps_predict = 0;
int delta_poc;
int k0 = 0;
int k = 0;
int i;
if (rps != sps->st_rps && sps->nb_st_rps)
rps_predict = get_bits1(gb);
rps->rps_predict = 0;
if (rps_predict) {
if (rps != sps->st_rps && sps->nb_st_rps)
rps->rps_predict = get_bits1(gb);
if (rps->rps_predict) {
const ShortTermRPS *rps_ridx;
int delta_rps;
unsigned abs_delta_rps;
uint8_t use_delta_flag = 0;
uint8_t delta_rps_sign;
if (is_slice_header) {
unsigned int delta_idx = get_ue_golomb_long(gb) + 1;
if (delta_idx > sps->nb_st_rps) {
rps->delta_idx = get_ue_golomb_long(gb) + 1;
if (rps->delta_idx > sps->nb_st_rps) {
av_log(avctx, AV_LOG_ERROR,
"Invalid value of delta_idx in slice header RPS: %d > %d.\n",
delta_idx, sps->nb_st_rps);
rps->delta_idx, sps->nb_st_rps);
return AVERROR_INVALIDDATA;
}
rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx];
rps_ridx = &sps->st_rps[sps->nb_st_rps - rps->delta_idx];
rps->rps_idx_num_delta_pocs = rps_ridx->num_delta_pocs;
} else
rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];
delta_rps_sign = get_bits1(gb);
abs_delta_rps = get_ue_golomb_long(gb) + 1;
if (abs_delta_rps < 1 || abs_delta_rps > 32768) {
rps->delta_rps_sign = get_bits1(gb);
rps->abs_delta_rps = get_ue_golomb_long(gb) + 1;
if (rps->abs_delta_rps > 32768) {
av_log(avctx, AV_LOG_ERROR,
"Invalid value of abs_delta_rps: %d\n",
abs_delta_rps);
rps->abs_delta_rps);
return AVERROR_INVALIDDATA;
}
delta_rps = (1 - (delta_rps_sign << 1)) * abs_delta_rps;
delta_rps = (1 - (rps->delta_rps_sign << 1)) * rps->abs_delta_rps;
for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {
int used = rps->used[k] = get_bits1(gb);
rps->use_delta_flag = 0;
if (!used)
use_delta_flag = get_bits1(gb);
rps->use_delta_flag = get_bits1(gb);
if (used || use_delta_flag) {
if (used || rps->use_delta_flag) {
if (i < rps_ridx->num_delta_pocs)
delta_poc = delta_rps + rps_ridx->delta_poc[i];
else
@ -210,7 +209,7 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
if (rps->num_delta_pocs) {
prev = 0;
for (i = 0; i < rps->num_negative_pics; i++) {
delta_poc = get_ue_golomb_long(gb) + 1;
delta_poc = rps->delta_poc_s0[i] = get_ue_golomb_long(gb) + 1;
if (delta_poc < 1 || delta_poc > 32768) {
av_log(avctx, AV_LOG_ERROR,
"Invalid value of delta_poc: %d\n",
@ -223,7 +222,7 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
}
prev = 0;
for (i = 0; i < nb_positive_pics; i++) {
delta_poc = get_ue_golomb_long(gb) + 1;
delta_poc = rps->delta_poc_s1[i] = get_ue_golomb_long(gb) + 1;
if (delta_poc < 1 || delta_poc > 32768) {
av_log(avctx, AV_LOG_ERROR,
"Invalid value of delta_poc: %d\n",

7
libavcodec/hevc_ps.h
View File

@ -70,9 +70,16 @@ typedef struct HEVCHdrParams {
} HEVCHdrParams;
typedef struct ShortTermRPS {
uint8_t rps_predict;
unsigned int delta_idx;
uint8_t use_delta_flag;
uint8_t delta_rps_sign;
unsigned int abs_delta_rps;
unsigned int num_negative_pics;
int num_delta_pocs;
int rps_idx_num_delta_pocs;
int32_t delta_poc_s0[32];
int32_t delta_poc_s1[32];
int32_t delta_poc[32];
uint8_t used[32];
} ShortTermRPS;