| /* |
| * 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. |
| */ |
| |
| #ifndef AOM_AV1_COMMON_CFL_H_ |
| #define AOM_AV1_COMMON_CFL_H_ |
| |
| #include "av1/common/av1_common_int.h" |
| #include "av1/common/blockd.h" |
| |
| // Can we use CfL for the current block? |
| static INLINE CFL_ALLOWED_TYPE is_cfl_allowed(const MACROBLOCKD *xd) { |
| const MB_MODE_INFO *mbmi = xd->mi[0]; |
| const BLOCK_SIZE bsize = mbmi->bsize; |
| assert(bsize < BLOCK_SIZES_ALL); |
| if (xd->lossless[mbmi->segment_id]) { |
| // In lossless, CfL is available when the partition size is equal to the |
| // transform size. |
| const int ssx = xd->plane[AOM_PLANE_U].subsampling_x; |
| const int ssy = xd->plane[AOM_PLANE_U].subsampling_y; |
| const int plane_bsize = get_plane_block_size(bsize, ssx, ssy); |
| return (CFL_ALLOWED_TYPE)(plane_bsize == BLOCK_4X4); |
| } |
| // Spec: CfL is available to luma partitions lesser than or equal to 32x32 |
| return (CFL_ALLOWED_TYPE)(block_size_wide[bsize] <= 32 && |
| block_size_high[bsize] <= 32); |
| } |
| |
| // Do we need to save the luma pixels from the current block, |
| // for a possible future CfL prediction? |
| static INLINE CFL_ALLOWED_TYPE store_cfl_required(const AV1_COMMON *cm, |
| const MACROBLOCKD *xd) { |
| const MB_MODE_INFO *mbmi = xd->mi[0]; |
| |
| if (cm->seq_params->monochrome) return CFL_DISALLOWED; |
| |
| if (!xd->is_chroma_ref) { |
| // For non-chroma-reference blocks, we should always store the luma pixels, |
| // in case the corresponding chroma-reference block uses CfL. |
| // Note that this can only happen for block sizes which are <8 on |
| // their shortest side, as otherwise they would be chroma reference |
| // blocks. |
| return CFL_ALLOWED; |
| } |
| |
| // If this block has chroma information, we know whether we're |
| // actually going to perform a CfL prediction |
| return (CFL_ALLOWED_TYPE)(!is_inter_block(mbmi) && |
| mbmi->uv_mode == UV_CFL_PRED); |
| } |
| |
| static INLINE int get_scaled_luma_q0(int alpha_q3, int16_t pred_buf_q3) { |
| int scaled_luma_q6 = alpha_q3 * pred_buf_q3; |
| return ROUND_POWER_OF_TWO_SIGNED(scaled_luma_q6, 6); |
| } |
| |
| static INLINE CFL_PRED_TYPE get_cfl_pred_type(int plane) { |
| assert(plane > 0); |
| return (CFL_PRED_TYPE)(plane - 1); |
| } |
| |
| static INLINE void clear_cfl_dc_pred_cache_flags(CFL_CTX *cfl) { |
| cfl->use_dc_pred_cache = false; |
| cfl->dc_pred_is_cached[CFL_PRED_U] = false; |
| cfl->dc_pred_is_cached[CFL_PRED_V] = false; |
| } |
| |
| void cfl_predict_block(MACROBLOCKD *const xd, uint8_t *dst, int dst_stride, |
| TX_SIZE tx_size, int plane); |
| |
| void cfl_store_block(MACROBLOCKD *const xd, BLOCK_SIZE bsize, TX_SIZE tx_size); |
| |
| void cfl_store_tx(MACROBLOCKD *const xd, int row, int col, TX_SIZE tx_size, |
| BLOCK_SIZE bsize); |
| |
| void cfl_store_dc_pred(MACROBLOCKD *const xd, const uint8_t *input, |
| CFL_PRED_TYPE pred_plane, int width); |
| |
| void cfl_load_dc_pred(MACROBLOCKD *const xd, uint8_t *dst, int dst_stride, |
| TX_SIZE tx_size, CFL_PRED_TYPE pred_plane); |
| |
| // Allows the CFL_SUBSAMPLE function to switch types depending on the bitdepth. |
| #define CFL_lbd_TYPE uint8_t *cfl_type |
| #define CFL_hbd_TYPE uint16_t *cfl_type |
| |
| // Declare a size-specific wrapper for the size-generic function. The compiler |
| // will inline the size generic function in here, the advantage is that the size |
| // will be constant allowing for loop unrolling and other constant propagated |
| // goodness. |
| #define CFL_SUBSAMPLE(arch, sub, bd, width, height) \ |
| void cfl_subsample_##bd##_##sub##_##width##x##height##_##arch( \ |
| const CFL_##bd##_TYPE, int input_stride, uint16_t *output_q3) { \ |
| cfl_luma_subsampling_##sub##_##bd##_##arch(cfl_type, input_stride, \ |
| output_q3, width, height); \ |
| } |
| |
| // Declare size-specific wrappers for all valid CfL sizes. |
| #define CFL_SUBSAMPLE_FUNCTIONS(arch, sub, bd) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 4, 4) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 8, 8) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 16, 16) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 32, 32) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 4, 8) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 8, 4) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 8, 16) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 16, 8) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 16, 32) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 32, 16) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 4, 16) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 16, 4) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 8, 32) \ |
| CFL_SUBSAMPLE(arch, sub, bd, 32, 8) \ |
| cfl_subsample_##bd##_fn cfl_get_luma_subsampling_##sub##_##bd##_##arch( \ |
| TX_SIZE tx_size) { \ |
| CFL_SUBSAMPLE_FUNCTION_ARRAY(arch, sub, bd) \ |
| return subfn_##sub[tx_size]; \ |
| } |
| |
| // Declare an architecture-specific array of function pointers for size-specific |
| // wrappers. |
| #define CFL_SUBSAMPLE_FUNCTION_ARRAY(arch, sub, bd) \ |
| static const cfl_subsample_##bd##_fn subfn_##sub[TX_SIZES_ALL] = { \ |
| cfl_subsample_##bd##_##sub##_4x4_##arch, /* 4x4 */ \ |
| cfl_subsample_##bd##_##sub##_8x8_##arch, /* 8x8 */ \ |
| cfl_subsample_##bd##_##sub##_16x16_##arch, /* 16x16 */ \ |
| cfl_subsample_##bd##_##sub##_32x32_##arch, /* 32x32 */ \ |
| NULL, /* 64x64 (invalid CFL size) */ \ |
| cfl_subsample_##bd##_##sub##_4x8_##arch, /* 4x8 */ \ |
| cfl_subsample_##bd##_##sub##_8x4_##arch, /* 8x4 */ \ |
| cfl_subsample_##bd##_##sub##_8x16_##arch, /* 8x16 */ \ |
| cfl_subsample_##bd##_##sub##_16x8_##arch, /* 16x8 */ \ |
| cfl_subsample_##bd##_##sub##_16x32_##arch, /* 16x32 */ \ |
| cfl_subsample_##bd##_##sub##_32x16_##arch, /* 32x16 */ \ |
| NULL, /* 32x64 (invalid CFL size) */ \ |
| NULL, /* 64x32 (invalid CFL size) */ \ |
| cfl_subsample_##bd##_##sub##_4x16_##arch, /* 4x16 */ \ |
| cfl_subsample_##bd##_##sub##_16x4_##arch, /* 16x4 */ \ |
| cfl_subsample_##bd##_##sub##_8x32_##arch, /* 8x32 */ \ |
| cfl_subsample_##bd##_##sub##_32x8_##arch, /* 32x8 */ \ |
| NULL, /* 16x64 (invalid CFL size) */ \ |
| NULL, /* 64x16 (invalid CFL size) */ \ |
| }; |
| |
| // The RTCD script does not support passing in an array, so we wrap it in this |
| // function. |
| #if CONFIG_AV1_HIGHBITDEPTH |
| #define CFL_GET_SUBSAMPLE_FUNCTION(arch) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 420, lbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 422, lbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 444, lbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 420, hbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 422, hbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 444, hbd) |
| #else |
| #define CFL_GET_SUBSAMPLE_FUNCTION(arch) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 420, lbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 422, lbd) \ |
| CFL_SUBSAMPLE_FUNCTIONS(arch, 444, lbd) |
| #endif |
| |
| // Declare a size-specific wrapper for the size-generic function. The compiler |
| // will inline the size generic function in here, the advantage is that the size |
| // will be constant allowing for loop unrolling and other constant propagated |
| // goodness. |
| #define CFL_SUB_AVG_X(arch, width, height, round_offset, num_pel_log2) \ |
| void cfl_subtract_average_##width##x##height##_##arch(const uint16_t *src, \ |
| int16_t *dst) { \ |
| subtract_average_##arch(src, dst, width, height, round_offset, \ |
| num_pel_log2); \ |
| } |
| |
| // Declare size-specific wrappers for all valid CfL sizes. |
| #define CFL_SUB_AVG_FN(arch) \ |
| CFL_SUB_AVG_X(arch, 4, 4, 8, 4) \ |
| CFL_SUB_AVG_X(arch, 4, 8, 16, 5) \ |
| CFL_SUB_AVG_X(arch, 4, 16, 32, 6) \ |
| CFL_SUB_AVG_X(arch, 8, 4, 16, 5) \ |
| CFL_SUB_AVG_X(arch, 8, 8, 32, 6) \ |
| CFL_SUB_AVG_X(arch, 8, 16, 64, 7) \ |
| CFL_SUB_AVG_X(arch, 8, 32, 128, 8) \ |
| CFL_SUB_AVG_X(arch, 16, 4, 32, 6) \ |
| CFL_SUB_AVG_X(arch, 16, 8, 64, 7) \ |
| CFL_SUB_AVG_X(arch, 16, 16, 128, 8) \ |
| CFL_SUB_AVG_X(arch, 16, 32, 256, 9) \ |
| CFL_SUB_AVG_X(arch, 32, 8, 128, 8) \ |
| CFL_SUB_AVG_X(arch, 32, 16, 256, 9) \ |
| CFL_SUB_AVG_X(arch, 32, 32, 512, 10) \ |
| cfl_subtract_average_fn cfl_get_subtract_average_fn_##arch( \ |
| TX_SIZE tx_size) { \ |
| static const cfl_subtract_average_fn sub_avg[TX_SIZES_ALL] = { \ |
| cfl_subtract_average_4x4_##arch, /* 4x4 */ \ |
| cfl_subtract_average_8x8_##arch, /* 8x8 */ \ |
| cfl_subtract_average_16x16_##arch, /* 16x16 */ \ |
| cfl_subtract_average_32x32_##arch, /* 32x32 */ \ |
| NULL, /* 64x64 (invalid CFL size) */ \ |
| cfl_subtract_average_4x8_##arch, /* 4x8 */ \ |
| cfl_subtract_average_8x4_##arch, /* 8x4 */ \ |
| cfl_subtract_average_8x16_##arch, /* 8x16 */ \ |
| cfl_subtract_average_16x8_##arch, /* 16x8 */ \ |
| cfl_subtract_average_16x32_##arch, /* 16x32 */ \ |
| cfl_subtract_average_32x16_##arch, /* 32x16 */ \ |
| NULL, /* 32x64 (invalid CFL size) */ \ |
| NULL, /* 64x32 (invalid CFL size) */ \ |
| cfl_subtract_average_4x16_##arch, /* 4x16 (invalid CFL size) */ \ |
| cfl_subtract_average_16x4_##arch, /* 16x4 (invalid CFL size) */ \ |
| cfl_subtract_average_8x32_##arch, /* 8x32 (invalid CFL size) */ \ |
| cfl_subtract_average_32x8_##arch, /* 32x8 (invalid CFL size) */ \ |
| NULL, /* 16x64 (invalid CFL size) */ \ |
| NULL, /* 64x16 (invalid CFL size) */ \ |
| }; \ |
| /* Modulo TX_SIZES_ALL to ensure that an attacker won't be able to */ \ |
| /* index the function pointer array out of bounds. */ \ |
| return sub_avg[tx_size % TX_SIZES_ALL]; \ |
| } |
| |
| // For VSX SIMD optimization, the C versions of width == 4 subtract are |
| // faster than the VSX. As such, the VSX code calls the C versions. |
| void cfl_subtract_average_4x4_c(const uint16_t *src, int16_t *dst); |
| void cfl_subtract_average_4x8_c(const uint16_t *src, int16_t *dst); |
| void cfl_subtract_average_4x16_c(const uint16_t *src, int16_t *dst); |
| |
| #define CFL_PREDICT_lbd(arch, width, height) \ |
| void cfl_predict_lbd_##width##x##height##_##arch( \ |
| const int16_t *pred_buf_q3, uint8_t *dst, int dst_stride, \ |
| int alpha_q3) { \ |
| cfl_predict_lbd_##arch(pred_buf_q3, dst, dst_stride, alpha_q3, width, \ |
| height); \ |
| } |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| #define CFL_PREDICT_hbd(arch, width, height) \ |
| void cfl_predict_hbd_##width##x##height##_##arch( \ |
| const int16_t *pred_buf_q3, uint16_t *dst, int dst_stride, int alpha_q3, \ |
| int bd) { \ |
| cfl_predict_hbd_##arch(pred_buf_q3, dst, dst_stride, alpha_q3, bd, width, \ |
| height); \ |
| } |
| #endif |
| |
| // This wrapper exists because clang format does not like calling macros with |
| // lowercase letters. |
| #define CFL_PREDICT_X(arch, width, height, bd) \ |
| CFL_PREDICT_##bd(arch, width, height) |
| |
| #define CFL_PREDICT_FN(arch, bd) \ |
| CFL_PREDICT_X(arch, 4, 4, bd) \ |
| CFL_PREDICT_X(arch, 4, 8, bd) \ |
| CFL_PREDICT_X(arch, 4, 16, bd) \ |
| CFL_PREDICT_X(arch, 8, 4, bd) \ |
| CFL_PREDICT_X(arch, 8, 8, bd) \ |
| CFL_PREDICT_X(arch, 8, 16, bd) \ |
| CFL_PREDICT_X(arch, 8, 32, bd) \ |
| CFL_PREDICT_X(arch, 16, 4, bd) \ |
| CFL_PREDICT_X(arch, 16, 8, bd) \ |
| CFL_PREDICT_X(arch, 16, 16, bd) \ |
| CFL_PREDICT_X(arch, 16, 32, bd) \ |
| CFL_PREDICT_X(arch, 32, 8, bd) \ |
| CFL_PREDICT_X(arch, 32, 16, bd) \ |
| CFL_PREDICT_X(arch, 32, 32, bd) \ |
| cfl_predict_##bd##_fn cfl_get_predict_##bd##_fn_##arch(TX_SIZE tx_size) { \ |
| static const cfl_predict_##bd##_fn pred[TX_SIZES_ALL] = { \ |
| cfl_predict_##bd##_4x4_##arch, /* 4x4 */ \ |
| cfl_predict_##bd##_8x8_##arch, /* 8x8 */ \ |
| cfl_predict_##bd##_16x16_##arch, /* 16x16 */ \ |
| cfl_predict_##bd##_32x32_##arch, /* 32x32 */ \ |
| NULL, /* 64x64 (invalid CFL size) */ \ |
| cfl_predict_##bd##_4x8_##arch, /* 4x8 */ \ |
| cfl_predict_##bd##_8x4_##arch, /* 8x4 */ \ |
| cfl_predict_##bd##_8x16_##arch, /* 8x16 */ \ |
| cfl_predict_##bd##_16x8_##arch, /* 16x8 */ \ |
| cfl_predict_##bd##_16x32_##arch, /* 16x32 */ \ |
| cfl_predict_##bd##_32x16_##arch, /* 32x16 */ \ |
| NULL, /* 32x64 (invalid CFL size) */ \ |
| NULL, /* 64x32 (invalid CFL size) */ \ |
| cfl_predict_##bd##_4x16_##arch, /* 4x16 */ \ |
| cfl_predict_##bd##_16x4_##arch, /* 16x4 */ \ |
| cfl_predict_##bd##_8x32_##arch, /* 8x32 */ \ |
| cfl_predict_##bd##_32x8_##arch, /* 32x8 */ \ |
| NULL, /* 16x64 (invalid CFL size) */ \ |
| NULL, /* 64x16 (invalid CFL size) */ \ |
| }; \ |
| /* Modulo TX_SIZES_ALL to ensure that an attacker won't be able to */ \ |
| /* index the function pointer array out of bounds. */ \ |
| return pred[tx_size % TX_SIZES_ALL]; \ |
| } |
| |
| #endif // AOM_AV1_COMMON_CFL_H_ |
