vp9_tile_common.c revision 5ae7ac49f08a179e4f054d99fcfc9dce78d26e58
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 135ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang#include "vp9/common/vp9_onyxc_int.h" 145ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang 1591037db265ecdd914a26e056cf69207b4f50924ehkuang#define MIN_TILE_WIDTH_B64 4 1691037db265ecdd914a26e056cf69207b4f50924ehkuang#define MAX_TILE_WIDTH_B64 64 1791037db265ecdd914a26e056cf69207b4f50924ehkuang 1891037db265ecdd914a26e056cf69207b4f50924ehkuangstatic int to_sbs(n_mis) { 191184aebb761cbeac9124c37189a80a1a58f04b6bhkuang return mi_cols_aligned_to_sb(n_mis) >> MI_BLOCK_SIZE_LOG2; 2091037db265ecdd914a26e056cf69207b4f50924ehkuang} 2191037db265ecdd914a26e056cf69207b4f50924ehkuang 225ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuangstatic void get_tile_offsets(int *min_tile_off, int *max_tile_off, 235ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang int tile_idx, int log2_n_tiles, int n_mis) { 2491037db265ecdd914a26e056cf69207b4f50924ehkuang const int n_sbs = to_sbs(n_mis); 25ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int sb_off1 = (tile_idx * n_sbs) >> log2_n_tiles; 26ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang const int sb_off2 = ((tile_idx + 1) * n_sbs) >> log2_n_tiles; 27ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 28ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang *min_tile_off = MIN(sb_off1 << 3, n_mis); 29ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang *max_tile_off = MIN(sb_off2 << 3, n_mis); 30ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 31ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 325ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuangvoid vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, 335ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang int row_idx, int col_idx) { 345ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang get_tile_offsets(&tile->mi_row_start, &tile->mi_row_end, 355ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang row_idx, cm->log2_tile_rows, cm->mi_rows); 365ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang get_tile_offsets(&tile->mi_col_start, &tile->mi_col_end, 375ae7ac49f08a179e4f054d99fcfc9dce78d26e58hkuang col_idx, cm->log2_tile_cols, cm->mi_cols); 38ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 39ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 4091037db265ecdd914a26e056cf69207b4f50924ehkuangvoid vp9_get_tile_n_bits(int mi_cols, 4191037db265ecdd914a26e056cf69207b4f50924ehkuang int *min_log2_tile_cols, int *max_log2_tile_cols) { 4291037db265ecdd914a26e056cf69207b4f50924ehkuang const int sb_cols = to_sbs(mi_cols); 43ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang int min_log2_n_tiles, max_log2_n_tiles; 44ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 45ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (max_log2_n_tiles = 0; 4691037db265ecdd914a26e056cf69207b4f50924ehkuang (sb_cols >> max_log2_n_tiles) >= MIN_TILE_WIDTH_B64; 47ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang max_log2_n_tiles++) {} 48ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang max_log2_n_tiles--; 49ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang if (max_log2_n_tiles < 0) 50ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang max_log2_n_tiles = 0; 51ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 52ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang for (min_log2_n_tiles = 0; 5391037db265ecdd914a26e056cf69207b4f50924ehkuang (MAX_TILE_WIDTH_B64 << min_log2_n_tiles) < sb_cols; 54ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang min_log2_n_tiles++) {} 55ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 5691037db265ecdd914a26e056cf69207b4f50924ehkuang assert(min_log2_n_tiles <= max_log2_n_tiles); 5791037db265ecdd914a26e056cf69207b4f50924ehkuang 5891037db265ecdd914a26e056cf69207b4f50924ehkuang *min_log2_tile_cols = min_log2_n_tiles; 5991037db265ecdd914a26e056cf69207b4f50924ehkuang *max_log2_tile_cols = max_log2_n_tiles; 60ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 61