1233d2500723e5594f3e7c70896ffeeef32b9c950ywan/* 2233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3233d2500723e5594f3e7c70896ffeeef32b9c950ywan * 4233d2500723e5594f3e7c70896ffeeef32b9c950ywan * Use of this source code is governed by a BSD-style license 5233d2500723e5594f3e7c70896ffeeef32b9c950ywan * that can be found in the LICENSE file in the root of the source 6233d2500723e5594f3e7c70896ffeeef32b9c950ywan * tree. An additional intellectual property rights grant can be found 7233d2500723e5594f3e7c70896ffeeef32b9c950ywan * in the file PATENTS. All contributing project authors may 8233d2500723e5594f3e7c70896ffeeef32b9c950ywan * be found in the AUTHORS file in the root of the source tree. 9233d2500723e5594f3e7c70896ffeeef32b9c950ywan */ 10233d2500723e5594f3e7c70896ffeeef32b9c950ywan 11233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/common/vp9_tile_common.h" 12233d2500723e5594f3e7c70896ffeeef32b9c950ywan 13233d2500723e5594f3e7c70896ffeeef32b9c950ywan#include "vp9/common/vp9_onyxc_int.h" 14233d2500723e5594f3e7c70896ffeeef32b9c950ywan 15233d2500723e5594f3e7c70896ffeeef32b9c950ywan#define MIN_TILE_WIDTH_B64 4 16233d2500723e5594f3e7c70896ffeeef32b9c950ywan#define MAX_TILE_WIDTH_B64 64 17233d2500723e5594f3e7c70896ffeeef32b9c950ywan 18233d2500723e5594f3e7c70896ffeeef32b9c950ywanstatic int get_tile_offset(int idx, int mis, int log2) { 19233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int sb_cols = mi_cols_aligned_to_sb(mis) >> MI_BLOCK_SIZE_LOG2; 20233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int offset = ((idx * sb_cols) >> log2) << MI_BLOCK_SIZE_LOG2; 21233d2500723e5594f3e7c70896ffeeef32b9c950ywan return MIN(offset, mis); 22233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 23233d2500723e5594f3e7c70896ffeeef32b9c950ywan 24233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, int row, int col) { 25233d2500723e5594f3e7c70896ffeeef32b9c950ywan tile->mi_row_start = get_tile_offset(row, cm->mi_rows, cm->log2_tile_rows); 26233d2500723e5594f3e7c70896ffeeef32b9c950ywan tile->mi_row_end = get_tile_offset(row + 1, cm->mi_rows, cm->log2_tile_rows); 27233d2500723e5594f3e7c70896ffeeef32b9c950ywan tile->mi_col_start = get_tile_offset(col, cm->mi_cols, cm->log2_tile_cols); 28233d2500723e5594f3e7c70896ffeeef32b9c950ywan tile->mi_col_end = get_tile_offset(col + 1, cm->mi_cols, cm->log2_tile_cols); 29233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 30233d2500723e5594f3e7c70896ffeeef32b9c950ywan 31233d2500723e5594f3e7c70896ffeeef32b9c950ywanvoid vp9_get_tile_n_bits(int mi_cols, 32233d2500723e5594f3e7c70896ffeeef32b9c950ywan int *min_log2_tile_cols, int *max_log2_tile_cols) { 33233d2500723e5594f3e7c70896ffeeef32b9c950ywan const int sb_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2; 34233d2500723e5594f3e7c70896ffeeef32b9c950ywan int min_log2 = 0, max_log2 = 0; 35233d2500723e5594f3e7c70896ffeeef32b9c950ywan 36233d2500723e5594f3e7c70896ffeeef32b9c950ywan // max 37233d2500723e5594f3e7c70896ffeeef32b9c950ywan while ((sb_cols >> max_log2) >= MIN_TILE_WIDTH_B64) 38233d2500723e5594f3e7c70896ffeeef32b9c950ywan ++max_log2; 39233d2500723e5594f3e7c70896ffeeef32b9c950ywan --max_log2; 40233d2500723e5594f3e7c70896ffeeef32b9c950ywan if (max_log2 < 0) 41233d2500723e5594f3e7c70896ffeeef32b9c950ywan max_log2 = 0; 42233d2500723e5594f3e7c70896ffeeef32b9c950ywan 43233d2500723e5594f3e7c70896ffeeef32b9c950ywan // min 44233d2500723e5594f3e7c70896ffeeef32b9c950ywan while ((MAX_TILE_WIDTH_B64 << min_log2) < sb_cols) 45233d2500723e5594f3e7c70896ffeeef32b9c950ywan ++min_log2; 46233d2500723e5594f3e7c70896ffeeef32b9c950ywan 47233d2500723e5594f3e7c70896ffeeef32b9c950ywan assert(min_log2 <= max_log2); 48233d2500723e5594f3e7c70896ffeeef32b9c950ywan 49233d2500723e5594f3e7c70896ffeeef32b9c950ywan *min_log2_tile_cols = min_log2; 50233d2500723e5594f3e7c70896ffeeef32b9c950ywan *max_log2_tile_cols = max_log2; 51233d2500723e5594f3e7c70896ffeeef32b9c950ywan} 52