/*
* Copyright ( c ) 2003 - 2010 Michael Niedermayer < michaelni @ gmx . at >
*
* This file is part of FFmpeg .
*
* FFmpeg is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 . 1 of the License , or ( at your option ) any later version .
*
* FFmpeg is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
/**
* @ file
* H . 264 DSP functions .
* @ author Michael Niedermayer < michaelni @ gmx . at >
*/
#ifndef AVCODEC_H264DSP_H
#define AVCODEC_H264DSP_H
#include <stdint.h>
#include <stddef.h>
typedef void (*h264_weight_func)(uint8_t *block, ptrdiff_t stride, int height,
int log2_denom, int weight, int offset);
typedef void (*h264_biweight_func)(uint8_t *dst, uint8_t *src,
ptrdiff_t stride, int height, int log2_denom,
int weightd, int weights, int offset);
/**
* Context for storing H . 264 DSP functions
*/
typedef struct H264DSPContext {
/* weighted MC */
h264_weight_func weight_pixels_tab[4 ];
h264_biweight_func biweight_pixels_tab[4 ];
/* loop filter */
void (*v_loop_filter_luma)(uint8_t *pix /*align 16*/, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void (*h_loop_filter_luma)(uint8_t *pix /*align 4 */, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void (*h_loop_filter_luma_mbaff)(uint8_t *pix /*align 16*/, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
/* v/h_loop_filter_luma_intra: align 16 */
void (*v_loop_filter_luma_intra)(uint8_t *pix, ptrdiff_t stride,
int alpha, int beta);
void (*h_loop_filter_luma_intra)(uint8_t *pix, ptrdiff_t stride,
int alpha, int beta);
void (*h_loop_filter_luma_mbaff_intra)(uint8_t *pix /*align 16*/,
ptrdiff_t stride, int alpha, int beta);
void (*v_loop_filter_chroma)(uint8_t *pix /*align 8*/, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void (*h_loop_filter_chroma)(uint8_t *pix /*align 4*/, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void (*h_loop_filter_chroma_mbaff)(uint8_t *pix /*align 8*/,
ptrdiff_t stride, int alpha, int beta,
int8_t *tc0);
void (*v_loop_filter_chroma_intra)(uint8_t *pix /*align 8*/,
ptrdiff_t stride, int alpha, int beta);
void (*h_loop_filter_chroma_intra)(uint8_t *pix /*align 8*/,
ptrdiff_t stride, int alpha, int beta);
void (*h_loop_filter_chroma_mbaff_intra)(uint8_t *pix /*align 8*/,
ptrdiff_t stride, int alpha, int beta);
// loop_filter_strength: simd only. the C version is inlined in h264_loopfilter.c
void (*loop_filter_strength)(int16_t bS[2 ][4 ][4 ], uint8_t nnz[40 ],
int8_t ref[2 ][40 ], int16_t mv[2 ][40 ][2 ],
int bidir, int edges, int step,
int mask_mv0, int mask_mv1, int field);
/* IDCT */
void (*idct_add)(uint8_t *dst /*align 4*/,
int16_t *block /*align 16*/, int stride);
void (*idct8_add)(uint8_t *dst /*align 8*/,
int16_t *block /*align 16*/, int stride);
void (*idct_dc_add)(uint8_t *dst /*align 4*/,
int16_t *block /*align 16*/, int stride);
void (*idct8_dc_add)(uint8_t *dst /*align 8*/,
int16_t *block /*align 16*/, int stride);
void (*idct_add16)(uint8_t *dst /*align 16*/, const int *blockoffset,
int16_t *block /*align 16*/, int stride,
const uint8_t nnzc[5 * 8 ]);
void (*idct8_add4)(uint8_t *dst /*align 16*/, const int *blockoffset,
int16_t *block /*align 16*/, int stride,
const uint8_t nnzc[5 * 8 ]);
void (*idct_add8)(uint8_t **dst /*align 16*/, const int *blockoffset,
int16_t *block /*align 16*/, int stride,
const uint8_t nnzc[15 * 8 ]);
void (*idct_add16intra)(uint8_t *dst /*align 16*/, const int *blockoffset,
int16_t *block /*align 16*/,
int stride, const uint8_t nnzc[5 * 8 ]);
void (*luma_dc_dequant_idct)(int16_t *output,
int16_t *input /*align 16*/, int qmul);
void (*chroma_dc_dequant_idct)(int16_t *block, int qmul);
/* bypass-transform */
void (*add_pixels8_clear)(uint8_t *dst, int16_t *block, int stride);
void (*add_pixels4_clear)(uint8_t *dst, int16_t *block, int stride);
/**
* Search buf from the start for up to size bytes . Return the index
* of a zero byte , or > = size if not found . Ideally , use lookahead
* to filter out any zero bytes that are known to not be followed by
* one or more further zero bytes and a one byte . Better still , filter
* out any bytes that form the trailing_zero_8bits syntax element too .
*/
int (*startcode_find_candidate)(const uint8_t *buf, int size);
} H264DSPContext;
void ff_h264dsp_init(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_aarch64(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_arm(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_ppc(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_riscv(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_mips(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
void ff_h264dsp_init_loongarch(H264DSPContext *c, const int bit_depth,
const int chroma_format_idc);
#endif /* AVCODEC_H264DSP_H */
Messung V0.5 in Prozent C=74 H=100 G=87
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(vorverarbeitet am 2026-08-22)
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