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lavc/hevc_ps: reduce the size of used_by_curr_pic_lt_sps_flag 

It is currently an array of 32 uint8_t, each storing a single flag. A
single uint32_t is sufficient.
This commit is contained in:
Anton Khirnov 2024-04-10 11:27:51 +02:00
parent 72bdbce00d
commit bd1a06dc43
4 changed files with 6 additions and 5 deletions
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4
libavcodec/hevc_ps.c
View File

@ -1094,9 +1094,11 @@ int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
sps->num_long_term_ref_pics_sps);
return AVERROR_INVALIDDATA;
}
sps->used_by_curr_pic_lt = 0;
for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb);
sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);
sps->used_by_curr_pic_lt |= get_bits1(gb) * (1 << i);
}
}

2
libavcodec/hevc_ps.h
View File

@ -230,7 +230,7 @@ typedef struct HEVCSPS {
uint8_t long_term_ref_pics_present_flag;
uint16_t lt_ref_pic_poc_lsb_sps[HEVC_MAX_LONG_TERM_REF_PICS];
uint8_t used_by_curr_pic_lt_sps_flag[HEVC_MAX_LONG_TERM_REF_PICS];
uint32_t used_by_curr_pic_lt;
uint8_t num_long_term_ref_pics_sps;
struct {

2
libavcodec/hevcdec.c
View File

@ -295,7 +295,7 @@ static int decode_lt_rps(HEVCContext *s, LongTermRPS *rps, GetBitContext *gb)
lt_idx_sps = get_bits(gb, av_ceil_log2(sps->num_long_term_ref_pics_sps));
rps->poc[i] = sps->lt_ref_pic_poc_lsb_sps[lt_idx_sps];
rps->used[i] = sps->used_by_curr_pic_lt_sps_flag[lt_idx_sps];
rps->used[i] = !!(sps->used_by_curr_pic_lt & (1 << lt_idx_sps));
} else {
rps->poc[i] = get_bits(gb, sps->log2_max_poc_lsb);
rps->used[i] = get_bits1(gb);

3
libavcodec/vulkan_hevc.c
View File

@ -386,11 +386,10 @@ static void set_sps(const HEVCSPS *sps, int sps_idx,
}
*ltr = (StdVideoH265LongTermRefPicsSps) {
.used_by_curr_pic_lt_sps_flag = 0x0,
.used_by_curr_pic_lt_sps_flag = sps->used_by_curr_pic_lt,
};
for (int i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
ltr->used_by_curr_pic_lt_sps_flag |= sps->used_by_curr_pic_lt_sps_flag[i] << i;
ltr->lt_ref_pic_poc_lsb_sps[i] = sps->lt_ref_pic_poc_lsb_sps[i];
}