vp9_tile_common.c revision 1184aebb761cbeac9124c37189a80a1a58f04b6b
1ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang/* 2ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * 4ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * Use of this source code is governed by a BSD-style license 5ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * that can be found in the LICENSE file in the root of the source 6ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * tree. An additional intellectual property rights grant can be found 7ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * in the file PATENTS. All contributing project authors may 8ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang * be found in the AUTHORS file in the root of the source tree. 9ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang */ 10ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 11ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang#include "vp9/common/vp9_tile_common.h" 12ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 1391037db265ecdd914a26e056cf69207b4f50924ehkuang#define MIN_TILE_WIDTH_B64 4 1491037db265ecdd914a26e056cf69207b4f50924ehkuang#define MAX_TILE_WIDTH_B64 64 1591037db265ecdd914a26e056cf69207b4f50924ehkuang 1691037db265ecdd914a26e056cf69207b4f50924ehkuangstatic int to_sbs(n_mis) { 171184aebb761cbeac9124c37189a80a1a58f04b6bhkuang return mi_cols_aligned_to_sb(n_mis) >> MI_BLOCK_SIZE_LOG2; 1891037db265ecdd914a26e056cf69207b4f50924ehkuang} 1991037db265ecdd914a26e056cf69207b4f50924ehkuang 2091037db265ecdd914a26e056cf69207b4f50924ehkuangstatic void vp9_get_tile_offsets(int *min_tile_off, int *max_tile_off, 2191037db265ecdd914a26e056cf69207b4f50924ehkuang int tile_idx, int log2_n_tiles, int n_mis) { 2291037db265ecdd914a26e056cf69207b4f50924ehkuang const int n_sbs = to_sbs(n_mis); 23ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int sb_off1 = (tile_idx * n_sbs) >> log2_n_tiles; 24ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int sb_off2 = ((tile_idx + 1) * n_sbs) >> log2_n_tiles; 25ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 26ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang *min_tile_off = MIN(sb_off1 << 3, n_mis); 27ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang *max_tile_off = MIN(sb_off2 << 3, n_mis); 28ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 29ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 30ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangvoid vp9_get_tile_col_offsets(VP9_COMMON *cm, int tile_col_idx) { 3191037db265ecdd914a26e056cf69207b4f50924ehkuang vp9_get_tile_offsets(&cm->cur_tile_mi_col_start, &cm->cur_tile_mi_col_end, 3291037db265ecdd914a26e056cf69207b4f50924ehkuang tile_col_idx, cm->log2_tile_cols, cm->mi_cols); 33ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 34ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 35ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuangvoid vp9_get_tile_row_offsets(VP9_COMMON *cm, int tile_row_idx) { 3691037db265ecdd914a26e056cf69207b4f50924ehkuang vp9_get_tile_offsets(&cm->cur_tile_mi_row_start, &cm->cur_tile_mi_row_end, 3791037db265ecdd914a26e056cf69207b4f50924ehkuang tile_row_idx, cm->log2_tile_rows, cm->mi_rows); 38ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 39ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 40ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 4191037db265ecdd914a26e056cf69207b4f50924ehkuangvoid vp9_get_tile_n_bits(int mi_cols, 4291037db265ecdd914a26e056cf69207b4f50924ehkuang int *min_log2_tile_cols, int *max_log2_tile_cols) { 4391037db265ecdd914a26e056cf69207b4f50924ehkuang const int sb_cols = to_sbs(mi_cols); 44ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang int min_log2_n_tiles, max_log2_n_tiles; 45ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 46ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (max_log2_n_tiles = 0; 4791037db265ecdd914a26e056cf69207b4f50924ehkuang (sb_cols >> max_log2_n_tiles) >= MIN_TILE_WIDTH_B64; 48ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang max_log2_n_tiles++) {} 49ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang max_log2_n_tiles--; 50ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang if (max_log2_n_tiles < 0) 51ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang max_log2_n_tiles = 0; 52ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 53ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (min_log2_n_tiles = 0; 5491037db265ecdd914a26e056cf69207b4f50924ehkuang (MAX_TILE_WIDTH_B64 << min_log2_n_tiles) < sb_cols; 55ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang min_log2_n_tiles++) {} 56ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 5791037db265ecdd914a26e056cf69207b4f50924ehkuang assert(min_log2_n_tiles <= max_log2_n_tiles); 5891037db265ecdd914a26e056cf69207b4f50924ehkuang 5991037db265ecdd914a26e056cf69207b4f50924ehkuang *min_log2_tile_cols = min_log2_n_tiles; 6091037db265ecdd914a26e056cf69207b4f50924ehkuang *max_log2_tile_cols = max_log2_n_tiles; 61ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 62