| /* |
| * 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) { |
| av1_tile_set_row(tile, cm, row); |
| av1_tile_set_col(tile, cm, col); |
| } |
| |
| // Find smallest k>=0 such that (blk_size << k) >= target |
| static int tile_log2(int blk_size, int target) { |
| int k; |
| for (k = 0; (blk_size << k) < target; k++) { |
| } |
| return k; |
| } |
| |
| void av1_get_tile_limits(AV1_COMMON *const cm) { |
| const SequenceHeader *const seq_params = cm->seq_params; |
| CommonTileParams *const tiles = &cm->tiles; |
| const int sb_cols = |
| CEIL_POWER_OF_TWO(cm->mi_params.mi_cols, seq_params->mib_size_log2); |
| const int sb_rows = |
| CEIL_POWER_OF_TWO(cm->mi_params.mi_rows, seq_params->mib_size_log2); |
| |
| const int sb_size_log2 = seq_params->mib_size_log2 + MI_SIZE_LOG2; |
| tiles->max_width_sb = MAX_TILE_WIDTH >> sb_size_log2; |
| |
| #if CONFIG_CWG_C013 |
| bool use_level_7_above = false; |
| for (int i = 0; i < seq_params->operating_points_cnt_minus_1 + 1; i++) { |
| if (seq_params->seq_level_idx[i] >= SEQ_LEVEL_7_0 && |
| seq_params->seq_level_idx[i] <= SEQ_LEVEL_8_3) { |
| // Currently it is assumed that levels 7.x and 8.x are either used for all |
| // operating points, or none of them. |
| if (i != 0 && !use_level_7_above) { |
| aom_internal_error(cm->error, AOM_CODEC_UNSUP_BITSTREAM, |
| "Either all the operating points are levels 7.x or " |
| "8.x, or none of them are."); |
| } |
| use_level_7_above = true; |
| } |
| } |
| const int max_tile_area_sb = |
| (use_level_7_above ? MAX_TILE_AREA_LEVEL_7_AND_ABOVE : MAX_TILE_AREA) >> |
| (2 * sb_size_log2); |
| #else |
| const int max_tile_area_sb = MAX_TILE_AREA >> (2 * sb_size_log2); |
| #endif |
| |
| tiles->min_log2_cols = tile_log2(tiles->max_width_sb, sb_cols); |
| tiles->max_log2_cols = tile_log2(1, AOMMIN(sb_cols, MAX_TILE_COLS)); |
| tiles->max_log2_rows = tile_log2(1, AOMMIN(sb_rows, MAX_TILE_ROWS)); |
| tiles->min_log2 = tile_log2(max_tile_area_sb, sb_cols * sb_rows); |
| tiles->min_log2 = AOMMAX(tiles->min_log2, tiles->min_log2_cols); |
| } |
| |
| void av1_calculate_tile_cols(const SequenceHeader *const seq_params, |
| int cm_mi_rows, int cm_mi_cols, |
| CommonTileParams *const tiles) { |
| int sb_cols = CEIL_POWER_OF_TWO(cm_mi_cols, seq_params->mib_size_log2); |
| int sb_rows = CEIL_POWER_OF_TWO(cm_mi_rows, seq_params->mib_size_log2); |
| int i; |
| |
| // This will be overridden if there is at least two columns of tiles |
| // (otherwise there is no inner tile width) |
| tiles->min_inner_width = -1; |
| |
| if (tiles->uniform_spacing) { |
| int start_sb; |
| int size_sb = CEIL_POWER_OF_TWO(sb_cols, tiles->log2_cols); |
| assert(size_sb > 0); |
| for (i = 0, start_sb = 0; start_sb < sb_cols; i++) { |
| tiles->col_start_sb[i] = start_sb; |
| start_sb += size_sb; |
| } |
| tiles->cols = i; |
| tiles->col_start_sb[i] = sb_cols; |
| tiles->min_log2_rows = AOMMAX(tiles->min_log2 - tiles->log2_cols, 0); |
| tiles->max_height_sb = sb_rows >> tiles->min_log2_rows; |
| |
| tiles->width = size_sb << seq_params->mib_size_log2; |
| tiles->width = AOMMIN(tiles->width, cm_mi_cols); |
| if (tiles->cols > 1) { |
| tiles->min_inner_width = tiles->width; |
| } |
| } else { |
| int max_tile_area_sb = (sb_rows * sb_cols); |
| int widest_tile_sb = 1; |
| int narrowest_inner_tile_sb = 65536; |
| tiles->log2_cols = tile_log2(1, tiles->cols); |
| for (i = 0; i < tiles->cols; i++) { |
| int size_sb = tiles->col_start_sb[i + 1] - tiles->col_start_sb[i]; |
| widest_tile_sb = AOMMAX(widest_tile_sb, size_sb); |
| // ignore the rightmost tile in frame for determining the narrowest |
| if (i < tiles->cols - 1) |
| narrowest_inner_tile_sb = AOMMIN(narrowest_inner_tile_sb, size_sb); |
| } |
| if (tiles->min_log2) { |
| max_tile_area_sb >>= (tiles->min_log2 + 1); |
| } |
| tiles->max_height_sb = AOMMAX(max_tile_area_sb / widest_tile_sb, 1); |
| if (tiles->cols > 1) { |
| tiles->min_inner_width = narrowest_inner_tile_sb |
| << seq_params->mib_size_log2; |
| } |
| } |
| } |
| |
| void av1_calculate_tile_rows(const SequenceHeader *const seq_params, |
| int cm_mi_rows, CommonTileParams *const tiles) { |
| int sb_rows = CEIL_POWER_OF_TWO(cm_mi_rows, seq_params->mib_size_log2); |
| int start_sb, size_sb, i; |
| |
| if (tiles->uniform_spacing) { |
| size_sb = CEIL_POWER_OF_TWO(sb_rows, tiles->log2_rows); |
| assert(size_sb > 0); |
| for (i = 0, start_sb = 0; start_sb < sb_rows; i++) { |
| tiles->row_start_sb[i] = start_sb; |
| start_sb += size_sb; |
| } |
| tiles->rows = i; |
| tiles->row_start_sb[i] = sb_rows; |
| |
| tiles->height = size_sb << seq_params->mib_size_log2; |
| tiles->height = AOMMIN(tiles->height, cm_mi_rows); |
| } else { |
| tiles->log2_rows = tile_log2(1, tiles->rows); |
| } |
| } |
| |
| void av1_tile_set_row(TileInfo *tile, const AV1_COMMON *cm, int row) { |
| assert(row < cm->tiles.rows); |
| int mi_row_start = cm->tiles.row_start_sb[row] |
| << cm->seq_params->mib_size_log2; |
| int mi_row_end = cm->tiles.row_start_sb[row + 1] |
| << cm->seq_params->mib_size_log2; |
| tile->tile_row = row; |
| tile->mi_row_start = mi_row_start; |
| tile->mi_row_end = AOMMIN(mi_row_end, cm->mi_params.mi_rows); |
| assert(tile->mi_row_end > tile->mi_row_start); |
| } |
| |
| void av1_tile_set_col(TileInfo *tile, const AV1_COMMON *cm, int col) { |
| assert(col < cm->tiles.cols); |
| int mi_col_start = cm->tiles.col_start_sb[col] |
| << cm->seq_params->mib_size_log2; |
| int mi_col_end = cm->tiles.col_start_sb[col + 1] |
| << cm->seq_params->mib_size_log2; |
| tile->tile_col = col; |
| tile->mi_col_start = mi_col_start; |
| tile->mi_col_end = AOMMIN(mi_col_end, cm->mi_params.mi_cols); |
| assert(tile->mi_col_end > tile->mi_col_start); |
| } |
| |
| int av1_get_sb_rows_in_tile(const AV1_COMMON *cm, const TileInfo *tile) { |
| return CEIL_POWER_OF_TWO(tile->mi_row_end - tile->mi_row_start, |
| cm->seq_params->mib_size_log2); |
| } |
| |
| int av1_get_sb_cols_in_tile(const AV1_COMMON *cm, const TileInfo *tile) { |
| return CEIL_POWER_OF_TWO(tile->mi_col_end - tile->mi_col_start, |
| cm->seq_params->mib_size_log2); |
| } |
| |
| // 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) { |
| const CommonTileParams *const tiles = &cm->tiles; |
| if (tiles->uniform_spacing) { |
| *w = tiles->width; |
| *h = tiles->height; |
| } else { |
| for (int i = 0; i < tiles->cols; ++i) { |
| const int tile_width_sb = |
| tiles->col_start_sb[i + 1] - tiles->col_start_sb[i]; |
| const int tile_w = tile_width_sb * cm->seq_params->mib_size; |
| // ensure all tiles have same dimension |
| if (i != 0 && tile_w != *w) { |
| return false; |
| } |
| *w = tile_w; |
| } |
| |
| for (int i = 0; i < tiles->rows; ++i) { |
| const int tile_height_sb = |
| tiles->row_start_sb[i + 1] - tiles->row_start_sb[i]; |
| const int tile_h = tile_height_sb * cm->seq_params->mib_size; |
| // ensure all tiles have same dimension |
| if (i != 0 && tile_h != *h) { |
| return false; |
| } |
| *h = tile_h; |
| } |
| } |
| return true; |
| } |
| |
| int av1_is_min_tile_width_satisfied(const AV1_COMMON *cm) { |
| // Disable check if there is a single tile col in the frame |
| if (cm->tiles.cols == 1) return 1; |
| |
| return ((cm->tiles.min_inner_width << MI_SIZE_LOG2) >= |
| (64 << av1_superres_scaled(cm))); |
| } |