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Diffstat (limited to 'media/libaom/src/av1/common/cfl.h')
| -rw-r--r-- | media/libaom/src/av1/common/cfl.h | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/media/libaom/src/av1/common/cfl.h b/media/libaom/src/av1/common/cfl.h new file mode 100644 index 000000000..d627891bf --- /dev/null +++ b/media/libaom/src/av1/common/cfl.h @@ -0,0 +1,302 @@ +/* + * 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/blockd.h" +#include "av1/common/onyxc_int.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->sb_type; + 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->cfl.is_chroma_reference) { + // 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(PLANE_TYPE plane) { + assert(plane > 0); + return (CFL_PRED_TYPE)(plane - 1); +} + +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); + +// Null function used for invalid tx_sizes +void cfl_subsample_lbd_null(const uint8_t *input, int input_stride, + uint16_t *output_q3); + +// Null function used for invalid tx_sizes +void cfl_subsample_hbd_null(const uint16_t *input, int input_stride, + uint16_t *output_q3); + +// 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 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] = { \ + subsample_##bd##_##sub##_4x4_##arch, /* 4x4 */ \ + subsample_##bd##_##sub##_8x8_##arch, /* 8x8 */ \ + subsample_##bd##_##sub##_16x16_##arch, /* 16x16 */ \ + subsample_##bd##_##sub##_32x32_##arch, /* 32x32 */ \ + cfl_subsample_##bd##_null, /* 64x64 (invalid CFL size) */ \ + subsample_##bd##_##sub##_4x8_##arch, /* 4x8 */ \ + subsample_##bd##_##sub##_8x4_##arch, /* 8x4 */ \ + subsample_##bd##_##sub##_8x16_##arch, /* 8x16 */ \ + subsample_##bd##_##sub##_16x8_##arch, /* 16x8 */ \ + subsample_##bd##_##sub##_16x32_##arch, /* 16x32 */ \ + subsample_##bd##_##sub##_32x16_##arch, /* 32x16 */ \ + cfl_subsample_##bd##_null, /* 32x64 (invalid CFL size) */ \ + cfl_subsample_##bd##_null, /* 64x32 (invalid CFL size) */ \ + subsample_##bd##_##sub##_4x16_##arch, /* 4x16 */ \ + subsample_##bd##_##sub##_16x4_##arch, /* 16x4 */ \ + subsample_##bd##_##sub##_8x32_##arch, /* 8x32 */ \ + subsample_##bd##_##sub##_32x8_##arch, /* 32x8 */ \ + cfl_subsample_##bd##_null, /* 16x64 (invalid CFL size) */ \ + cfl_subsample_##bd##_null, /* 64x16 (invalid CFL size) */ \ + }; + +// The RTCD script does not support passing in an array, so we wrap it in this +// function. +#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) + +// Null function used for invalid tx_sizes +static INLINE void cfl_subtract_average_null(const uint16_t *src, + int16_t *dst) { + (void)dst; + (void)src; + assert(0); +} + +// 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 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 get_subtract_average_fn_##arch(TX_SIZE tx_size) { \ + static const cfl_subtract_average_fn sub_avg[TX_SIZES_ALL] = { \ + subtract_average_4x4_##arch, /* 4x4 */ \ + subtract_average_8x8_##arch, /* 8x8 */ \ + subtract_average_16x16_##arch, /* 16x16 */ \ + subtract_average_32x32_##arch, /* 32x32 */ \ + cfl_subtract_average_null, /* 64x64 (invalid CFL size) */ \ + subtract_average_4x8_##arch, /* 4x8 */ \ + subtract_average_8x4_##arch, /* 8x4 */ \ + subtract_average_8x16_##arch, /* 8x16 */ \ + subtract_average_16x8_##arch, /* 16x8 */ \ + subtract_average_16x32_##arch, /* 16x32 */ \ + subtract_average_32x16_##arch, /* 32x16 */ \ + cfl_subtract_average_null, /* 32x64 (invalid CFL size) */ \ + cfl_subtract_average_null, /* 64x32 (invalid CFL size) */ \ + subtract_average_4x16_##arch, /* 4x16 (invalid CFL size) */ \ + subtract_average_16x4_##arch, /* 16x4 (invalid CFL size) */ \ + subtract_average_8x32_##arch, /* 8x32 (invalid CFL size) */ \ + subtract_average_32x8_##arch, /* 32x8 (invalid CFL size) */ \ + cfl_subtract_average_null, /* 16x64 (invalid CFL size) */ \ + cfl_subtract_average_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 subtract_average_4x4_c(const uint16_t *src, int16_t *dst); +void subtract_average_4x8_c(const uint16_t *src, int16_t *dst); +void subtract_average_4x16_c(const uint16_t *src, int16_t *dst); + +#define CFL_PREDICT_lbd(arch, width, height) \ + void 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); \ + } + +#define CFL_PREDICT_hbd(arch, width, height) \ + void 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); \ + } + +// 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) + +// Null function used for invalid tx_sizes +void cfl_predict_lbd_null(const int16_t *pred_buf_q3, uint8_t *dst, + int dst_stride, int alpha_q3); + +// Null function used for invalid tx_sizes +void cfl_predict_hbd_null(const int16_t *pred_buf_q3, uint16_t *dst, + int dst_stride, int alpha_q3, int bd); + +#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 get_predict_##bd##_fn_##arch(TX_SIZE tx_size) { \ + static const cfl_predict_##bd##_fn pred[TX_SIZES_ALL] = { \ + predict_##bd##_4x4_##arch, /* 4x4 */ \ + predict_##bd##_8x8_##arch, /* 8x8 */ \ + predict_##bd##_16x16_##arch, /* 16x16 */ \ + predict_##bd##_32x32_##arch, /* 32x32 */ \ + cfl_predict_##bd##_null, /* 64x64 (invalid CFL size) */ \ + predict_##bd##_4x8_##arch, /* 4x8 */ \ + predict_##bd##_8x4_##arch, /* 8x4 */ \ + predict_##bd##_8x16_##arch, /* 8x16 */ \ + predict_##bd##_16x8_##arch, /* 16x8 */ \ + predict_##bd##_16x32_##arch, /* 16x32 */ \ + predict_##bd##_32x16_##arch, /* 32x16 */ \ + cfl_predict_##bd##_null, /* 32x64 (invalid CFL size) */ \ + cfl_predict_##bd##_null, /* 64x32 (invalid CFL size) */ \ + predict_##bd##_4x16_##arch, /* 4x16 */ \ + predict_##bd##_16x4_##arch, /* 16x4 */ \ + predict_##bd##_8x32_##arch, /* 8x32 */ \ + predict_##bd##_32x8_##arch, /* 32x8 */ \ + cfl_predict_##bd##_null, /* 16x64 (invalid CFL size) */ \ + cfl_predict_##bd##_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_ |