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Estimate SAO merge coding costs better.

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- This doesn't seem to have very much of an effect. I guess the difference
  between 1 and 2 bits isn't that important.
This commit is contained in:
Ari Koivula 2014-04-15 15:09:42 +03:00
parent ef7840c623
commit c968253eb3
1 changed files with 45 additions and 21 deletions
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54
src/sao.c
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@ -141,10 +141,22 @@ static int sao_mode_bits_edge(int edge_class, int offsets[NUM_SAO_EDGE_CATEGORIE
{
int mode_bits = 0;
if ((sao_top != NULL && sao_check_merge(sao_top, SAO_TYPE_EDGE, offsets, 0, edge_class)) ||
(sao_left != NULL && sao_check_merge(sao_left, SAO_TYPE_EDGE, offsets, 0, edge_class))) {
// FL coded merges.
if (sao_left != NULL) {
mode_bits += 1;
} else {
if (sao_check_merge(sao_left, SAO_TYPE_EDGE, offsets, 0, edge_class)) {
return mode_bits;
}
}
if (sao_top != NULL) {
mode_bits += 1;
if (sao_check_merge(sao_top, SAO_TYPE_EDGE, offsets, 0, edge_class)) {
return mode_bits;
}
}
// TR coded offsets.
{
sao_eo_cat edge_cat;
for (edge_cat = SAO_EO_CAT1; edge_cat <= SAO_EO_CAT4; ++edge_cat) {
int abs_offset = abs(offsets[edge_cat]);
@ -154,6 +166,7 @@ static int sao_mode_bits_edge(int edge_class, int offsets[NUM_SAO_EDGE_CATEGORIE
mode_bits += abs_offset + 2;
}
}
}
// TR coded sao_eo_class_
if (edge_class == SAO_EO0 || edge_class == SAO_EO3) {
@ -162,24 +175,34 @@ static int sao_mode_bits_edge(int edge_class, int offsets[NUM_SAO_EDGE_CATEGORIE
mode_bits += 2;
}
}
return mode_bits;
}
static int sao_mode_bits_band(int band_position, int offsets[NUM_SAO_EDGE_CATEGORIES],
static int sao_mode_bits_band(int band_position, int offsets[4],
sao_info *sao_top, sao_info *sao_left)
{
int mode_bits = 0;
if ((sao_top != NULL && sao_check_merge(sao_top, SAO_TYPE_BAND, offsets, band_position, 0)) ||
(sao_left != NULL && sao_check_merge(sao_left, SAO_TYPE_BAND, offsets, band_position, 0))) {
// FL coded merges.
if (sao_left != NULL) {
mode_bits += 1;
} else {
sao_eo_cat edge_cat;
for (edge_cat = SAO_EO_CAT1; edge_cat <= SAO_EO_CAT4; ++edge_cat) {
int abs_offset = abs(offsets[edge_cat]);
if (sao_check_merge(sao_left, SAO_TYPE_BAND, offsets, band_position, 0)) {
return mode_bits;
}
}
if (sao_top != NULL) {
mode_bits += 1;
if (sao_check_merge(sao_top, SAO_TYPE_BAND, offsets, band_position, 0)) {
return mode_bits;
}
}
// TR coded offsets and possible FL coded offset signs.
{
int i;
for (i = 0; i < 4; ++i) {
int abs_offset = abs(offsets[i]);
if (abs_offset == 0) {
mode_bits += abs_offset + 1;
} else if (abs_offset == SAO_ABS_OFFSET_MAX) {
@ -188,10 +211,11 @@ static int sao_mode_bits_band(int band_position, int offsets[NUM_SAO_EDGE_CATEGO
mode_bits += abs_offset + 2 + 1;
}
}
mode_bits += 5; // FL coded band position.
}
// FL coded band position.
mode_bits += 5;
return mode_bits;
}
@ -714,7 +738,7 @@ static void sao_search_best_mode(const pixel * data[], const pixel * recdata[],
}
{
int mode_bits = sao_mode_bits_band(band_sao.band_position, band_sao.offsets, sao_top, sao_left);
int mode_bits = sao_mode_bits_band(band_sao.band_position, &band_sao.offsets[1], sao_top, sao_left);
int ddistortion = mode_bits * (int)(g_cur_lambda_cost + 0.5);
unsigned buf_i;