| /* |
| * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "vp9/common/vp9_tile_common.h" |
| #include "vp9/common/vp9_onyxc_int.h" |
| #include "vpx_dsp/vpx_dsp_common.h" |
| |
| #define MIN_TILE_WIDTH_B64 4 |
| #define MAX_TILE_WIDTH_B64 64 |
| |
| static int get_tile_offset(int idx, int mis, int log2) { |
| const int sb_cols = mi_cols_aligned_to_sb(mis) >> MI_BLOCK_SIZE_LOG2; |
| const int offset = ((idx * sb_cols) >> log2) << MI_BLOCK_SIZE_LOG2; |
| return VPXMIN(offset, mis); |
| } |
| |
| void vp9_tile_set_row(TileInfo *tile, const VP9_COMMON *cm, int row) { |
| tile->mi_row_start = get_tile_offset(row, cm->mi_rows, cm->log2_tile_rows); |
| tile->mi_row_end = get_tile_offset(row + 1, cm->mi_rows, cm->log2_tile_rows); |
| } |
| |
| void vp9_tile_set_col(TileInfo *tile, const VP9_COMMON *cm, int col) { |
| tile->mi_col_start = get_tile_offset(col, cm->mi_cols, cm->log2_tile_cols); |
| tile->mi_col_end = get_tile_offset(col + 1, cm->mi_cols, cm->log2_tile_cols); |
| } |
| |
| void vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, int row, int col) { |
| vp9_tile_set_row(tile, cm, row); |
| 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 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); |
| } |