1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
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.
9 */
10 #define INLINE __inline
11
12 #include "vp9_onyxc_int.h"
13 #include "vp9_enums.h"
14 #include "vpx_dsp_common.h"
15
16 #define MIN_TILE_WIDTH_B64 4
17 #define MAX_TILE_WIDTH_B64 64
18
get_tile_offset(int idx,int mis,int log2)19 static int get_tile_offset(int idx, int mis, int log2) {
20 const int sb_cols = mi_cols_aligned_to_sb(mis) >> MI_BLOCK_SIZE_LOG2;
21 const int offset = ((idx * sb_cols) >> log2) << MI_BLOCK_SIZE_LOG2;
22 return VPXMIN(offset, mis);
23 }
24
eb_vp9_tile_set_row(TileInfo * tile,const VP9_COMMON * cm,int row)25 void eb_vp9_tile_set_row(TileInfo *tile, const VP9_COMMON *cm, int row) {
26 tile->mi_row_start = get_tile_offset(row, cm->mi_rows, cm->log2_tile_rows);
27 tile->mi_row_end = get_tile_offset(row + 1, cm->mi_rows, cm->log2_tile_rows);
28 }
29
eb_vp9_tile_set_col(TileInfo * tile,const VP9_COMMON * cm,int col)30 void eb_vp9_tile_set_col(TileInfo *tile, const VP9_COMMON *cm, int col) {
31 tile->mi_col_start = get_tile_offset(col, cm->mi_cols, cm->log2_tile_cols);
32 tile->mi_col_end = get_tile_offset(col + 1, cm->mi_cols, cm->log2_tile_cols);
33 }
34
eb_vp9_tile_init(TileInfo * tile,const VP9_COMMON * cm,int row,int col)35 void eb_vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, int row, int col) {
36 eb_vp9_tile_set_row(tile, cm, row);
37 eb_vp9_tile_set_col(tile, cm, col);
38 }
39
get_min_log2_tile_cols(const int sb64_cols)40 static int get_min_log2_tile_cols(const int sb64_cols) {
41 int min_log2 = 0;
42 while ((MAX_TILE_WIDTH_B64 << min_log2) < sb64_cols) ++min_log2;
43 return min_log2;
44 }
45
get_max_log2_tile_cols(const int sb64_cols)46 static int get_max_log2_tile_cols(const int sb64_cols) {
47 int max_log2 = 1;
48 while ((sb64_cols >> max_log2) >= MIN_TILE_WIDTH_B64) ++max_log2;
49 return max_log2 - 1;
50 }
51
eb_vp9_get_tile_n_bits(int mi_cols,int * min_log2_tile_cols,int * max_log2_tile_cols)52 void eb_vp9_get_tile_n_bits(int mi_cols, int *min_log2_tile_cols,
53 int *max_log2_tile_cols) {
54 const int sb64_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2;
55 *min_log2_tile_cols = get_min_log2_tile_cols(sb64_cols);
56 *max_log2_tile_cols = get_max_log2_tile_cols(sb64_cols);
57 assert(*min_log2_tile_cols <= *max_log2_tile_cols);
58 }
59