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lavc/hevc_ps: compactify ShortTermRPS 

Do not use larger fields than needed, use size-1 bitfields for flags.

Reduces sizeof(HEVCSPS) by 1280 bytes.
This commit is contained in:
Anton Khirnov 2024-04-10 14:42:37 +02:00
parent 9127819d51
commit 63a96dbcce
3 changed files with 15 additions and 12 deletions
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6
libavcodec/hevc_ps.c
View File

@ -143,11 +143,11 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {
used[k] = get_bits1(gb);
rps->use_delta_flag = 0;
rps->use_delta = 0;
if (!used[k])
rps->use_delta_flag = get_bits1(gb);
rps->use_delta = get_bits1(gb);
if (used[k] || rps->use_delta_flag) {
if (used[k] || rps->use_delta) {
if (i < rps_ridx->num_delta_pocs)
delta_poc = delta_rps + rps_ridx->delta_poc[i];
else

19
libavcodec/hevc_ps.h
View File

@ -70,16 +70,19 @@ 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[32];
uint32_t used;
uint8_t delta_idx;
uint8_t num_negative_pics;
uint8_t num_delta_pocs;
uint8_t rps_idx_num_delta_pocs;
uint16_t abs_delta_rps;
unsigned delta_rps_sign:1;
unsigned rps_predict:1;
unsigned use_delta:1;
} ShortTermRPS;
typedef struct HEVCWindow {

2
libavcodec/vulkan_hevc.c
View File

@ -359,7 +359,7 @@ static void set_sps(const HEVCSPS *sps, int sps_idx,
.delta_rps_sign = sps->st_rps[i].delta_rps_sign,
},
.delta_idx_minus1 = sps->st_rps[i].delta_idx - 1,
.use_delta_flag = sps->st_rps[i].use_delta_flag,
.use_delta_flag = sps->st_rps[i].use_delta,
.abs_delta_rps_minus1 = sps->st_rps[i].abs_delta_rps - 1,
.used_by_curr_pic_flag = 0x0,
.used_by_curr_pic_s0_flag = 0x0,