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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.

Anton Khirnov committed 2 years ago

Commit 63a96db1 parent 91278193 files · +15 −12Browse files

Unified · Split

3 files
  1. libavcodec/hevc_ps.c +3 −3
  2. libavcodec/hevc_ps.h +11 −8
  3. libavcodec/vulkan_hevc.c +1 −1
libavcodec/hevc_ps.c+3−3
@@ -143,11 +143,11 @@ int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx, · 142 unmodified lines
143143 for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {
144144 used[k] = get_bits1(gb);
145145
146− rps->use_delta_flag = 0;
146+ rps->use_delta = 0;
147147 if (!used[k])
148− rps->use_delta_flag = get_bits1(gb);
148+ rps->use_delta = get_bits1(gb);
149149
150− if (used[k] || rps->use_delta_flag) {
150+ if (used[k] || rps->use_delta) {
151151 if (i < rps_ridx->num_delta_pocs)
152152 delta_poc = delta_rps + rps_ridx->delta_poc[i];
153153 else
libavcodec/hevc_ps.h+11−8
@@ -70,16 +70,19 @@ typedef struct HEVCHdrParams { · 69 unmodified lines
7070 } HEVCHdrParams;
7171
7272 typedef struct ShortTermRPS {
73− uint8_t rps_predict;
74− unsigned int delta_idx;
75− uint8_t use_delta_flag;
76− uint8_t delta_rps_sign;
77− unsigned int abs_delta_rps;
78− unsigned int num_negative_pics;
79− int num_delta_pocs;
80− int rps_idx_num_delta_pocs;
8173 int32_t delta_poc[32];
8274 uint32_t used;
75+
76+ uint8_t delta_idx;
77+ uint8_t num_negative_pics;
78+ uint8_t num_delta_pocs;
79+ uint8_t rps_idx_num_delta_pocs;
80+
81+ uint16_t abs_delta_rps;
82+ unsigned delta_rps_sign:1;
83+
84+ unsigned rps_predict:1;
85+ unsigned use_delta:1;
8386 } ShortTermRPS;
8487
8588 typedef struct HEVCWindow {
libavcodec/vulkan_hevc.c+1−1
@@ -359,7 +359,7 @@ static void set_sps(const HEVCSPS *sps, int sps_idx, · 358 unmodified lines
359359 .delta_rps_sign = sps->st_rps[i].delta_rps_sign,
360360 },
361361 .delta_idx_minus1 = sps->st_rps[i].delta_idx - 1,
362− .use_delta_flag = sps->st_rps[i].use_delta_flag,
362+ .use_delta_flag = sps->st_rps[i].use_delta,
363363 .abs_delta_rps_minus1 = sps->st_rps[i].abs_delta_rps - 1,
364364 .used_by_curr_pic_flag = 0x0,
365365 .used_by_curr_pic_s0_flag = 0x0,

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