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Add SAO coding costs for sao_eo_class, band position and offset sign.

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- This reduces bdrate a little bit.

- It seems like increasing the bit cost of using SAO in general
  increases bdrate.
This commit is contained in:
Ari Koivula 2014-04-15 14:55:13 +03:00
parent 9ff32c566c
commit ef7840c623
1 changed files with 14 additions and 2 deletions
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16
src/sao.c
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@ -154,6 +154,14 @@ static int sao_mode_bits_edge(int edge_class, int offsets[NUM_SAO_EDGE_CATEGORIE
mode_bits += abs_offset + 2; mode_bits += abs_offset + 2;
} }
} }
// TR coded sao_eo_class_
if (edge_class == SAO_EO0 || edge_class == SAO_EO3) {
mode_bits += 1;
} else {
mode_bits += 2;
}
} }
return mode_bits; return mode_bits;
@ -172,12 +180,16 @@ static int sao_mode_bits_band(int band_position, int offsets[NUM_SAO_EDGE_CATEGO
sao_eo_cat edge_cat; sao_eo_cat edge_cat;
for (edge_cat = SAO_EO_CAT1; edge_cat <= SAO_EO_CAT4; ++edge_cat) { for (edge_cat = SAO_EO_CAT1; edge_cat <= SAO_EO_CAT4; ++edge_cat) {
int abs_offset = abs(offsets[edge_cat]); int abs_offset = abs(offsets[edge_cat]);
if (abs_offset == 0 || abs_offset == SAO_ABS_OFFSET_MAX) { if (abs_offset == 0) {
mode_bits += abs_offset + 1; mode_bits += abs_offset + 1;
} else if (abs_offset == SAO_ABS_OFFSET_MAX) {
mode_bits += abs_offset + 1 + 1;
} else { } else {
mode_bits += abs_offset + 2; mode_bits += abs_offset + 2 + 1;
} }
} }
mode_bits += 5; // FL coded band position.
} }
return mode_bits; return mode_bits;