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h264dsp.h
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1 /*
2  * Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * H.264 DSP functions.
24  * @author Michael Niedermayer <michaelni@gmx.at>
25  */
26 
27 #ifndef AVCODEC_H264DSP_H
28 #define AVCODEC_H264DSP_H
29 
30 #include <stdint.h>
31 
32 typedef void (*h264_weight_func)(uint8_t *block, int stride, int height,
33  int log2_denom, int weight, int offset);
34 typedef void (*h264_biweight_func)(uint8_t *dst, uint8_t *src,
35  int stride, int height, int log2_denom,
36  int weightd, int weights, int offset);
37 
38 /**
39  * Context for storing H.264 DSP functions
40  */
41 typedef struct H264DSPContext {
42  /* weighted MC */
43  h264_weight_func weight_h264_pixels_tab[4];
44  h264_biweight_func biweight_h264_pixels_tab[4];
45 
46  /* loop filter */
47  void (*h264_v_loop_filter_luma)(uint8_t *pix /*align 16*/, int stride,
48  int alpha, int beta, int8_t *tc0);
49  void (*h264_h_loop_filter_luma)(uint8_t *pix /*align 4 */, int stride,
50  int alpha, int beta, int8_t *tc0);
51  void (*h264_h_loop_filter_luma_mbaff)(uint8_t *pix /*align 16*/, int stride,
52  int alpha, int beta, int8_t *tc0);
53  /* v/h_loop_filter_luma_intra: align 16 */
54  void (*h264_v_loop_filter_luma_intra)(uint8_t *pix, int stride,
55  int alpha, int beta);
56  void (*h264_h_loop_filter_luma_intra)(uint8_t *pix, int stride,
57  int alpha, int beta);
58  void (*h264_h_loop_filter_luma_mbaff_intra)(uint8_t *pix /*align 16*/,
59  int stride, int alpha, int beta);
60  void (*h264_v_loop_filter_chroma)(uint8_t *pix /*align 8*/, int stride,
61  int alpha, int beta, int8_t *tc0);
62  void (*h264_h_loop_filter_chroma)(uint8_t *pix /*align 4*/, int stride,
63  int alpha, int beta, int8_t *tc0);
64  void (*h264_h_loop_filter_chroma_mbaff)(uint8_t *pix /*align 8*/,
65  int stride, int alpha, int beta,
66  int8_t *tc0);
67  void (*h264_v_loop_filter_chroma_intra)(uint8_t *pix /*align 8*/,
68  int stride, int alpha, int beta);
69  void (*h264_h_loop_filter_chroma_intra)(uint8_t *pix /*align 8*/,
70  int stride, int alpha, int beta);
71  void (*h264_h_loop_filter_chroma_mbaff_intra)(uint8_t *pix /*align 8*/,
72  int stride, int alpha, int beta);
73  // h264_loop_filter_strength: simd only. the C version is inlined in h264.c
74  void (*h264_loop_filter_strength)(int16_t bS[2][4][4], uint8_t nnz[40],
75  int8_t ref[2][40], int16_t mv[2][40][2],
76  int bidir, int edges, int step,
77  int mask_mv0, int mask_mv1, int field);
78 
79  /* IDCT */
80  void (*h264_idct_add)(uint8_t *dst /*align 4*/,
81  int16_t *block /*align 16*/, int stride);
82  void (*h264_idct8_add)(uint8_t *dst /*align 8*/,
83  int16_t *block /*align 16*/, int stride);
84  void (*h264_idct_dc_add)(uint8_t *dst /*align 4*/,
85  int16_t *block /*align 16*/, int stride);
86  void (*h264_idct8_dc_add)(uint8_t *dst /*align 8*/,
87  int16_t *block /*align 16*/, int stride);
88 
89  void (*h264_idct_add16)(uint8_t *dst /*align 16*/, const int *blockoffset,
90  int16_t *block /*align 16*/, int stride,
91  const uint8_t nnzc[15 * 8]);
92  void (*h264_idct8_add4)(uint8_t *dst /*align 16*/, const int *blockoffset,
93  int16_t *block /*align 16*/, int stride,
94  const uint8_t nnzc[15 * 8]);
95  void (*h264_idct_add8)(uint8_t **dst /*align 16*/, const int *blockoffset,
96  int16_t *block /*align 16*/, int stride,
97  const uint8_t nnzc[15 * 8]);
98  void (*h264_idct_add16intra)(uint8_t *dst /*align 16*/, const int *blockoffset,
99  int16_t *block /*align 16*/,
100  int stride, const uint8_t nnzc[15 * 8]);
101  void (*h264_luma_dc_dequant_idct)(int16_t *output,
102  int16_t *input /*align 16*/, int qmul);
103  void (*h264_chroma_dc_dequant_idct)(int16_t *block, int qmul);
104 
105  /* bypass-transform */
106  void (*h264_add_pixels8_clear)(uint8_t *dst, int16_t *block, int stride);
107  void (*h264_add_pixels4_clear)(uint8_t *dst, int16_t *block, int stride);
108 
109  /**
110  * Search buf from the start for up to size bytes. Return the index
111  * of a zero byte, or >= size if not found. Ideally, use lookahead
112  * to filter out any zero bytes that are known to not be followed by
113  * one or more further zero bytes and a one byte. Better still, filter
114  * out any bytes that form the trailing_zero_8bits syntax element too.
115  */
116  int (*h264_find_start_code_candidate)(const uint8_t *buf, int size);
117 } H264DSPContext;
118 
119 void ff_h264dsp_init(H264DSPContext *c, const int bit_depth,
120  const int chroma_format_idc);
121 void ff_h264dsp_init_aarch64(H264DSPContext *c, const int bit_depth,
122  const int chroma_format_idc);
123 void ff_h264dsp_init_arm(H264DSPContext *c, const int bit_depth,
124  const int chroma_format_idc);
125 void ff_h264dsp_init_ppc(H264DSPContext *c, const int bit_depth,
126  const int chroma_format_idc);
127 void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth,
128  const int chroma_format_idc);
129 
130 #endif /* AVCODEC_H264DSP_H */
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