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Diffstat (limited to 'third_party/aom/av1/common/partition.c')
| -rw-r--r-- | third_party/aom/av1/common/partition.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/partition.c b/third_party/aom/av1/common/partition.c new file mode 100644 index 000000000..634a9edd5 --- /dev/null +++ b/third_party/aom/av1/common/partition.c @@ -0,0 +1,256 @@ +/* + * Copyright (c) 2001-2016, 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. + */ + +/* clang-format off */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "enums.h" +#include "odintrin.h" +#include "partition.h" +#include "zigzag.h" + +OD_EXTERN const index_pair *OD_ZIGZAG4[4] = { + OD_ZIGZAG4_DCT_DCT, + OD_ZIGZAG4_ADST_DCT, + OD_ZIGZAG4_DCT_ADST, + OD_ZIGZAG4_ADST_ADST +}; + +OD_EXTERN const index_pair *OD_ZIGZAG8[4] = { + OD_ZIGZAG8_DCT_DCT, + OD_ZIGZAG8_ADST_DCT, + OD_ZIGZAG8_DCT_ADST, + OD_ZIGZAG8_ADST_ADST +}; + +OD_EXTERN const index_pair *OD_ZIGZAG16[4] = { + OD_ZIGZAG16_DCT_DCT, + OD_ZIGZAG16_ADST_DCT, + OD_ZIGZAG16_DCT_ADST, + OD_ZIGZAG16_ADST_ADST +}; + +OD_EXTERN const index_pair *OD_ZIGZAG32[4] = { + OD_ZIGZAG32_DCT_DCT, + OD_ZIGZAG32_DCT_DCT, + OD_ZIGZAG32_DCT_DCT, + OD_ZIGZAG32_DCT_DCT +}; + +/* The tables below specify how coefficient blocks are translated to + and from PVQ partition coding scan order for 4x4, 8x8 and 16x16 */ + +static const int OD_LAYOUT32_OFFSETS[4] = { 0, 128, 256, 768 }; +const band_layout OD_LAYOUT32 = { + OD_ZIGZAG32, + 32, + 3, + OD_LAYOUT32_OFFSETS +}; + +static const int OD_LAYOUT16_OFFSETS[4] = { 0, 32, 64, 192 }; +const band_layout OD_LAYOUT16 = { + OD_ZIGZAG16, + 16, + 3, + OD_LAYOUT16_OFFSETS +}; + +const int OD_LAYOUT8_OFFSETS[4] = { 0, 8, 16, 48 }; +const band_layout OD_LAYOUT8 = { + OD_ZIGZAG8, + 8, + 3, + OD_LAYOUT8_OFFSETS +}; + +static const int OD_LAYOUT4_OFFSETS[2] = { 0, 15 }; +const band_layout OD_LAYOUT4 = { + OD_ZIGZAG4, + 4, + 1, + OD_LAYOUT4_OFFSETS +}; + +/* First element is the number of bands, followed by the list all the band + boundaries. */ +static const int OD_BAND_OFFSETS4[] = {1, 1, 16}; +static const int OD_BAND_OFFSETS8[] = {4, 1, 16, 24, 32, 64}; +static const int OD_BAND_OFFSETS16[] = {7, 1, 16, 24, 32, 64, 96, 128, 256}; +static const int OD_BAND_OFFSETS32[] = {10, 1, 16, 24, 32, 64, 96, 128, 256, + 384, 512, 1024}; +static const int OD_BAND_OFFSETS64[] = {13, 1, 16, 24, 32, 64, 96, 128, 256, + 384, 512, 1024, 1536, 2048, 4096}; + +const int *const OD_BAND_OFFSETS[OD_TXSIZES + 1] = { + OD_BAND_OFFSETS4, + OD_BAND_OFFSETS8, + OD_BAND_OFFSETS16, + OD_BAND_OFFSETS32, + OD_BAND_OFFSETS64 +}; + +/** Perform a single stage of conversion from a coefficient block in + * raster order into coding scan order + * + * @param [in] layout scan order specification + * @param [out] dst destination vector + * @param [in] src source coefficient block + * @param [int] int source vector row stride + */ +static void od_band_from_raster(const band_layout *layout, tran_low_t *dst, + const tran_low_t *src, int stride, TX_TYPE tx_type) { + int i; + int len; + len = layout->band_offsets[layout->nb_bands]; + for (i = 0; i < len; i++) { + dst[i] = src[layout->dst_table[tx_type][i][1]*stride + layout->dst_table[tx_type][i][0]]; + } +} + +/** Perform a single stage of conversion from a vector in coding scan + order back into a coefficient block in raster order + * + * @param [in] layout scan order specification + * @param [out] dst destination coefficient block + * @param [in] src source vector + * @param [int] stride destination vector row stride + */ +static void od_raster_from_band(const band_layout *layout, tran_low_t *dst, + int stride, TX_TYPE tx_type, const tran_low_t *src) { + int i; + int len; + len = layout->band_offsets[layout->nb_bands]; + for (i = 0; i < len; i++) { + dst[layout->dst_table[tx_type][i][1]*stride + layout->dst_table[tx_type][i][0]] = src[i]; + } +} + +static const band_layout *const OD_LAYOUTS[] = {&OD_LAYOUT4, &OD_LAYOUT8, + &OD_LAYOUT16, &OD_LAYOUT32}; + +/** Converts a coefficient block in raster order into a vector in + * coding scan order with the PVQ partitions laid out one after + * another. This works in stages; the 4x4 conversion is applied to + * the coefficients nearest DC, then the 8x8 applied to the 8x8 block + * nearest DC that was not already coded by 4x4, then 16x16 following + * the same pattern. + * + * @param [out] dst destination vector + * @param [in] n block size (along one side) + * @param [in] ty_type transfrom type + * @param [in] src source coefficient block + * @param [in] stride source vector row stride + */ +void od_raster_to_coding_order(tran_low_t *dst, int n, TX_TYPE ty_type, + const tran_low_t *src, int stride) { + int bs; + /* dst + 1 because DC is not included for 4x4 blocks. */ + od_band_from_raster(OD_LAYOUTS[0], dst + 1, src, stride, ty_type); + for (bs = 1; bs < OD_TXSIZES; bs++) { + int size; + int offset; + /* Length of block size > 4. */ + size = 1 << (OD_LOG_BSIZE0 + bs); + /* Offset is the size of the previous block squared. */ + offset = 1 << 2*(OD_LOG_BSIZE0 - 1 + bs); + if (n >= size) { + /* 3 16x16 bands come after 3 8x8 bands, which come after 2 4x4 bands. */ + od_band_from_raster(OD_LAYOUTS[bs], dst + offset, src, stride, ty_type); + } + } + dst[0] = src[0]; +} + +/** Converts a vector in coding scan order witht he PVQ partitions + * laid out one after another into a coefficient block in raster + * order. This works in stages in the reverse order of raster->scan + * order; the 16x16 conversion is applied to the coefficients that + * don't appear in an 8x8 block, then the 8x8 applied to the 8x8 block + * sans the 4x4 block it contains, then 4x4 is converted sans DC. + * + * @param [out] dst destination coefficient block + * @param [in] stride destination vector row stride + * @param [in] src source vector + * @param [in] n block size (along one side) + */ +void od_coding_order_to_raster(tran_low_t *dst, int stride, TX_TYPE ty_type, + const tran_low_t *src, int n) { + int bs; + /* src + 1 because DC is not included for 4x4 blocks. */ + od_raster_from_band(OD_LAYOUTS[0], dst, stride, ty_type, src + 1); + for (bs = 1; bs < OD_TXSIZES; bs++) { + int size; + int offset; + /* Length of block size > 4 */ + size = 1 << (OD_LOG_BSIZE0 + bs); + /* Offset is the size of the previous block squared. */ + offset = 1 << 2*(OD_LOG_BSIZE0 - 1 + bs); + if (n >= size) { + /* 3 16x16 bands come after 3 8x8 bands, which come after 2 4x4 bands. */ + od_raster_from_band(OD_LAYOUTS[bs], dst, stride, ty_type, src + offset); + } + } + dst[0] = src[0]; +} + +/** Perform a single stage of conversion from a coefficient block in + * raster order into coding scan order + * + * @param [in] layout scan order specification + * @param [out] dst destination vector + * @param [in] src source coefficient block + * @param [int] int source vector row stride + */ +static void od_band_from_raster_16(const band_layout *layout, int16_t *dst, + const int16_t *src, int stride) { + int i; + int len; + len = layout->band_offsets[layout->nb_bands]; + for (i = 0; i < len; i++) { + dst[i] = src[layout->dst_table[DCT_DCT][i][1]*stride + layout->dst_table[DCT_DCT][i][0]]; + } +} + +/** Converts a coefficient block in raster order into a vector in + * coding scan order with the PVQ partitions laid out one after + * another. This works in stages; the 4x4 conversion is applied to + * the coefficients nearest DC, then the 8x8 applied to the 8x8 block + * nearest DC that was not already coded by 4x4, then 16x16 following + * the same pattern. + * + * @param [out] dst destination vector + * @param [in] n block size (along one side) + * @param [in] src source coefficient block + * @param [in] stride source vector row stride + */ +void od_raster_to_coding_order_16(int16_t *dst, int n, const int16_t *src, + int stride) { + int bs; + /* dst + 1 because DC is not included for 4x4 blocks. */ + od_band_from_raster_16(OD_LAYOUTS[0], dst + 1, src, stride); + for (bs = 1; bs < OD_TXSIZES; bs++) { + int size; + int offset; + /* Length of block size > 4. */ + size = 1 << (OD_LOG_BSIZE0 + bs); + /* Offset is the size of the previous block squared. */ + offset = 1 << 2*(OD_LOG_BSIZE0 - 1 + bs); + if (n >= size) { + /* 3 16x16 bands come after 3 8x8 bands, which come after 2 4x4 bands. */ + od_band_from_raster_16(OD_LAYOUTS[bs], dst + offset, src, stride); + } + } + dst[0] = src[0]; +} |