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Code Issues Releases Activity

avcodec/smcenc: improve compression ratio a little

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Actually reverts previous change.
This commit is contained in:
Paul B Mahol 2022-12-02 21:17:34 +01:00
parent fb51eebc6c
commit 8d9f7fa79e
1 changed files with 13 additions and 12 deletions
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25
libavcodec/smcenc.c
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@ -127,16 +127,11 @@ static void smc_encode_stream(SMCContext *s, const AVFrame *frame,
int color_pair_index = 0;
int color_quad_index = 0;
int color_octet_index = 0;
int prev_block_inter = 0;
int color_table_index; /* indexes to color pair, quad, or octet tables */
int total_blocks;
int cur_y = 0;
int cur_x = 0;
memset(s->color_pairs, 0, sizeof(s->color_pairs));
memset(s->color_quads, 0, sizeof(s->color_quads));
memset(s->color_octets, 0, sizeof(s->color_octets));
/* Number of 4x4 blocks in frame. */
total_blocks = ((width + 3) / 4) * ((height + 3) / 4);
@ -183,7 +178,7 @@ static void smc_encode_stream(SMCContext *s, const AVFrame *frame,
cur_y = frame_y;
cur_x = frame_x;
while (block_counter > 0 && prev_block_inter == 0 && block_counter + intra_skip_blocks < total_blocks) {
while (block_counter > 0 && block_counter + intra_skip_blocks < total_blocks) {
const int y_size = FFMIN(4, height - cur_y);
const int x_size = FFMIN(4, width - cur_x);
const ptrdiff_t offset = xpixel_ptr - src_pixels;
@ -249,30 +244,36 @@ static void smc_encode_stream(SMCContext *s, const AVFrame *frame,
cur_y = frame_y;
cur_x = frame_x;
blocks = coded_blocks;
blocks = coded_distinct <= 8 ? coded_blocks : 0;
distinct = coded_distinct;
if (intra_skip_blocks > 0 && intra_skip_blocks >= inter_skip_blocks) {
if (intra_skip_blocks >= blocks && intra_skip_blocks >= inter_skip_blocks) {
distinct = 17;
blocks = intra_skip_blocks;
}
if (intra_skip_blocks > 16 && intra_skip_blocks >= inter_skip_blocks) {
if (intra_skip_blocks > 16 && intra_skip_blocks >= inter_skip_blocks &&
intra_skip_blocks >= blocks) {
distinct = 18;
blocks = intra_skip_blocks;
}
if (inter_skip_blocks > 0 && inter_skip_blocks > intra_skip_blocks) {
if (inter_skip_blocks >= blocks && inter_skip_blocks > intra_skip_blocks) {
distinct = 19;
blocks = inter_skip_blocks;
}
if (inter_skip_blocks > 16 && inter_skip_blocks > intra_skip_blocks) {
if (inter_skip_blocks > 16 && inter_skip_blocks > intra_skip_blocks &&
inter_skip_blocks >= blocks) {
distinct = 20;
blocks = inter_skip_blocks;
}
prev_block_inter = distinct == 19 || distinct == 20;
if (blocks == 0) {
blocks = coded_blocks;
distinct = coded_distinct;
}
switch (distinct) {
case 1:
if (blocks <= 16) {