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Refactor calculation of tile_cols

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Change-Id: I2c38ea2bcf6d221a0b6b2fb9be4cebbee21006a3
This commit is contained in:
Yaowu Xu 2015-01-07 08:49:43 -08:00
parent 2fe1bfa5ad
commit e9cf9b7dfe
1 changed files with 18 additions and 18 deletions
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36
vp9/common/vp9_tile_common.c
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@ -36,24 +36,24 @@ void vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, int row, int col) {
vp9_tile_set_col(tile, cm, col);
}
static int get_min_log2_tile_cols(const int sb64_cols) {
int min_log2 = 0;
while ((MAX_TILE_WIDTH_B64 << min_log2) < sb64_cols)
++min_log2;
return min_log2;
}
static int get_max_log2_tile_cols(const int sb64_cols) {
int max_log2 = 1;
while ((sb64_cols >> max_log2) >= MIN_TILE_WIDTH_B64)
++max_log2;
return max_log2 - 1;
}
void vp9_get_tile_n_bits(int mi_cols,
int *min_log2_tile_cols, int *max_log2_tile_cols) {
const int sb_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2;
int min_log2 = 0, max_log2 = 0;
// max
while ((sb_cols >> max_log2) >= MIN_TILE_WIDTH_B64)
++max_log2;
--max_log2;
if (max_log2 < 0)
max_log2 = 0;
// min
while ((MAX_TILE_WIDTH_B64 << min_log2) < sb_cols)
++min_log2;
assert(min_log2 <= max_log2);
*min_log2_tile_cols = min_log2;
*max_log2_tile_cols = max_log2;
const int sb64_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2;
*min_log2_tile_cols = get_min_log2_tile_cols(sb64_cols);
*max_log2_tile_cols = get_max_log2_tile_cols(sb64_cols);
assert(*min_log2_tile_cols <= *max_log2_tile_cols);
}