chromium/third_party/libaom/source/libaom/av1/common/tile_common.c

/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#include <stdbool.h>

#include "av1/common/av1_common_int.h"
#include "av1/common/resize.h"
#include "av1/common/tile_common.h"
#include "aom_dsp/aom_dsp_common.h"

void av1_tile_init(TileInfo *tile, const AV1_COMMON *cm, int row, int col) { … }

// Find smallest k>=0 such that (blk_size << k) >= target
static int tile_log2(int blk_size, int target) { … }

void av1_get_tile_limits(AV1_COMMON *const cm) { … }

void av1_calculate_tile_cols(const SequenceHeader *const seq_params,
                             int cm_mi_rows, int cm_mi_cols,
                             CommonTileParams *const tiles) { … }

void av1_calculate_tile_rows(const SequenceHeader *const seq_params,
                             int cm_mi_rows, CommonTileParams *const tiles) { … }

void av1_tile_set_row(TileInfo *tile, const AV1_COMMON *cm, int row) { … }

void av1_tile_set_col(TileInfo *tile, const AV1_COMMON *cm, int col) { … }

int av1_get_sb_rows_in_tile(const AV1_COMMON *cm, const TileInfo *tile) { … }

int av1_get_sb_cols_in_tile(const AV1_COMMON *cm, const TileInfo *tile) { … }

// Section 7.3.1 of the AV1 spec says, on pages 200-201:
//   It is a requirement of bitstream conformance that the following conditions
//   are met:
//     ...
//     * TileHeight is equal to (use_128x128_superblock ? 128 : 64) for all
//       tiles (i.e. the tile is exactly one superblock high)
//     * TileWidth is identical for all tiles and is an integer multiple of
//       TileHeight (i.e. the tile is an integer number of superblocks wide)
//     ...
bool av1_get_uniform_tile_size(const AV1_COMMON *cm, int *w, int *h) { … }

int av1_is_min_tile_width_satisfied(const AV1_COMMON *cm) { … }