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 18b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianstatic int get_tile_offset(int idx, int mis, int log2) { 19b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian const int sb_cols = mi_cols_aligned_to_sb(mis) >> MI_BLOCK_SIZE_LOG2; 20b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian const int offset = ((idx * sb_cols) >> log2) << MI_BLOCK_SIZE_LOG2; 21b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian return MIN(offset, mis); 2291037db265ecdd914a26e056cf69207b4f50924ehkuang} 2391037db265ecdd914a26e056cf69207b4f50924ehkuang 24b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianvoid vp9_tile_init(TileInfo *tile, const VP9_COMMON *cm, int row, int col) { 25b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian tile->mi_row_start = get_tile_offset(row, cm->mi_rows, cm->log2_tile_rows); 26b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian tile->mi_row_end = get_tile_offset(row + 1, cm->mi_rows, cm->log2_tile_rows); 27b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian tile->mi_col_start = get_tile_offset(col, cm->mi_cols, cm->log2_tile_cols); 28b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian tile->mi_col_end = get_tile_offset(col + 1, cm->mi_cols, cm->log2_tile_cols); 29ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 30ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 3191037db265ecdd914a26e056cf69207b4f50924ehkuangvoid vp9_get_tile_n_bits(int mi_cols, 3291037db265ecdd914a26e056cf69207b4f50924ehkuang int *min_log2_tile_cols, int *max_log2_tile_cols) { 33b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian const int sb_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2; 34b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian int min_log2 = 0, max_log2 = 0; 35ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 36b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // max 37b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian while ((sb_cols >> max_log2) >= MIN_TILE_WIDTH_B64) 38b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian ++max_log2; 39b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian --max_log2; 40b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (max_log2 < 0) 41b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian max_log2 = 0; 42ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 43b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // min 44b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian while ((MAX_TILE_WIDTH_B64 << min_log2) < sb_cols) 45b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian ++min_log2; 46ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang 47b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian assert(min_log2 <= max_log2); 4891037db265ecdd914a26e056cf69207b4f50924ehkuang 49b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *min_log2_tile_cols = min_log2; 50b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *max_log2_tile_cols = max_log2; 51ba164dffc5a6795bce97fae02b51ccf3330e15e4hkuang} 52