490ba1ad25
If configured with --enable-ext-tile, the codec uses an alternative tile coding syntax in the bitstream. Changes include:: - The maximum number of tile rows and columns is extended to 1024 each. - The minimum tile width/height is 64 pixels (1 superblock). - A tile copy mode is added where a tile directly reuse the coded data of a previous tile - The meaning of the tile-columns and tile-rows codec parameters are overloaded to mean tile-width and tile-height in units of 64 pixels. - All tiles should now be independent, including rows within the same columns, so large scale parallel, or independent decoding is possible. - vpxdec also gained the options to decode only a particular tile, tile row, or tile column. Changes without --enable-ext-tile: - All tiles should now be independent, including rows within the same columns, so large scale parallel, or independent decoding is possible. - vpxenc default tile configuration changed to use 1 tile column. Change-Id: I0cd08ad550967ac18622dae5e98ad23d581cb33e
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vp10/common/tile_common.h"
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#include "vp10/common/onyxc_int.h"
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#include "vpx_dsp/vpx_dsp_common.h"
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#define MIN_TILE_WIDTH_B64 4
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#define MAX_TILE_WIDTH_B64 64
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void vp10_tile_set_row(TileInfo *tile, const VP10_COMMON *cm, int row) {
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tile->mi_row_start = row * cm->tile_height;
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tile->mi_row_end = VPXMIN(tile->mi_row_start + cm->tile_height,
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cm->mi_rows);
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}
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void vp10_tile_set_col(TileInfo *tile, const VP10_COMMON *cm, int col) {
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tile->mi_col_start = col * cm->tile_width;
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tile->mi_col_end = VPXMIN(tile->mi_col_start + cm->tile_width,
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cm->mi_cols);
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}
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void vp10_tile_init(TileInfo *tile, const VP10_COMMON *cm, int row, int col) {
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vp10_tile_set_row(tile, cm, row);
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vp10_tile_set_col(tile, cm, col);
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}
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#if !CONFIG_EXT_TILE
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// TODO(geza.lore): CU_SIZE dependent.
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static int get_min_log2_tile_cols(const int sb64_cols) {
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int min_log2 = 0;
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while ((MAX_TILE_WIDTH_B64 << min_log2) < sb64_cols)
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++min_log2;
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return min_log2;
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}
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static int get_max_log2_tile_cols(const int sb64_cols) {
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int max_log2 = 1;
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while ((sb64_cols >> max_log2) >= MIN_TILE_WIDTH_B64)
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++max_log2;
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return max_log2 - 1;
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}
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void vp10_get_tile_n_bits(int mi_cols,
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int *min_log2_tile_cols, int *max_log2_tile_cols) {
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const int sb64_cols = mi_cols_aligned_to_sb(mi_cols) >> MI_BLOCK_SIZE_LOG2;
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*min_log2_tile_cols = get_min_log2_tile_cols(sb64_cols);
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*max_log2_tile_cols = get_max_log2_tile_cols(sb64_cols);
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assert(*min_log2_tile_cols <= *max_log2_tile_cols);
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}
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#endif // !CONFIG_EXT_TILE
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