2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #include "vp9/common/vp9_tile_common.h"
13 #include "vp9/common/vp9_onyxc_int.h"
15 #define MIN_TILE_WIDTH_B64 4
16 #define MAX_TILE_WIDTH_B64 64
18 static int get_tile_offset(int idx, int mis, int log2) {
19 const int sb_cols = mi_cols_aligned_to_sb(mis) >> MI_BLOCK_SIZE_LOG2;
20 const int offset = ((idx * sb_cols) >> log2) << MI_BLOCK_SIZE_LOG2;
21 return MIN(offset, mis);
24 void vp9_tile_set_row(TileInfo *tile, const VP9_COMMON *cm, int row) {
25 tile->mi_row_start = get_tile_offset(row, cm->mi_rows, cm->log2_tile_rows);
26 tile->mi_row_end = get_tile_offset(row + 1, cm->mi_rows, cm->log2_tile_rows);
29 void vp9_tile_set_col(TileInfo *tile, const VP9_COMMON *cm, int col) {
30 tile->mi_col_start = get_tile_offset(col, cm->mi_cols, cm->log2_tile_cols);
31 tile->mi_col_end = get_tile_offset(col + 1, cm->mi_cols, cm->log2_tile_cols);
34 void vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, int row, int col) {
35 vp9_tile_set_row(tile, cm, row);
36 vp9_tile_set_col(tile, cm, col);
39 void vp9_get_tile_n_bits(int mi_cols,
40 int *min_log2_tile_cols, int *max_log2_tile_cols) {
41 const int sb_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2;
42 int min_log2 = 0, max_log2 = 0;
45 while ((sb_cols >> max_log2) >= MIN_TILE_WIDTH_B64)
52 while ((MAX_TILE_WIDTH_B64 << min_log2) < sb_cols)
55 assert(min_log2 <= max_log2);
57 *min_log2_tile_cols = min_log2;
58 *max_log2_tile_cols = max_log2;