Libav
h264dsp.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3  * Copyright (c) 2003-2010 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
31 #include "avcodec.h"
32 #include "h264dsp.h"
33 #include "h264idct.h"
34 #include "libavutil/common.h"
35 
36 #define BIT_DEPTH 8
37 #include "h264dsp_template.c"
38 #undef BIT_DEPTH
39 
40 #define BIT_DEPTH 9
41 #include "h264dsp_template.c"
42 #undef BIT_DEPTH
43 
44 #define BIT_DEPTH 10
45 #include "h264dsp_template.c"
46 #undef BIT_DEPTH
47 
48 #define BIT_DEPTH 8
49 #include "h264addpx_template.c"
50 #undef BIT_DEPTH
51 
52 #define BIT_DEPTH 16
53 #include "h264addpx_template.c"
54 #undef BIT_DEPTH
55 
56 static int h264_find_start_code_candidate_c(const uint8_t *buf, int size)
57 {
58  int i = 0;
59 #if HAVE_FAST_UNALIGNED
60  /* we check i < size instead of i + 3 / 7 because it is
61  * simpler and there must be FF_INPUT_BUFFER_PADDING_SIZE
62  * bytes at the end.
63  */
64 #if HAVE_FAST_64BIT
65  while (i < size &&
66  !((~*(const uint64_t *)(buf + i) &
67  (*(const uint64_t *)(buf + i) - 0x0101010101010101ULL)) &
68  0x8080808080808080ULL))
69  i += 8;
70 #else
71  while (i < size &&
72  !((~*(const uint32_t *)(buf + i) &
73  (*(const uint32_t *)(buf + i) - 0x01010101U)) &
74  0x80808080U))
75  i += 4;
76 #endif
77 #endif
78  for (; i < size; i++)
79  if (!buf[i])
80  break;
81  return i;
82 }
83 
84 av_cold void ff_h264dsp_init(H264DSPContext *c, const int bit_depth,
85  const int chroma_format_idc)
86 {
87 #undef FUNC
88 #define FUNC(a, depth) a ## _ ## depth ## _c
89 
90 #define ADDPX_DSP(depth) \
91  c->h264_add_pixels4_clear = FUNC(ff_h264_add_pixels4, depth);\
92  c->h264_add_pixels8_clear = FUNC(ff_h264_add_pixels8, depth)
93 
94  if (bit_depth > 8 && bit_depth <= 16) {
95  ADDPX_DSP(16);
96  } else {
97  ADDPX_DSP(8);
98  }
99 
100 #define H264_DSP(depth) \
101  c->h264_idct_add= FUNC(ff_h264_idct_add, depth);\
102  c->h264_idct8_add= FUNC(ff_h264_idct8_add, depth);\
103  c->h264_idct_dc_add= FUNC(ff_h264_idct_dc_add, depth);\
104  c->h264_idct8_dc_add= FUNC(ff_h264_idct8_dc_add, depth);\
105  c->h264_idct_add16 = FUNC(ff_h264_idct_add16, depth);\
106  c->h264_idct8_add4 = FUNC(ff_h264_idct8_add4, depth);\
107  if (chroma_format_idc <= 1)\
108  c->h264_idct_add8 = FUNC(ff_h264_idct_add8, depth);\
109  else\
110  c->h264_idct_add8 = FUNC(ff_h264_idct_add8_422, depth);\
111  c->h264_idct_add16intra= FUNC(ff_h264_idct_add16intra, depth);\
112  c->h264_luma_dc_dequant_idct= FUNC(ff_h264_luma_dc_dequant_idct, depth);\
113  if (chroma_format_idc <= 1)\
114  c->h264_chroma_dc_dequant_idct= FUNC(ff_h264_chroma_dc_dequant_idct, depth);\
115  else\
116  c->h264_chroma_dc_dequant_idct= FUNC(ff_h264_chroma422_dc_dequant_idct, depth);\
117 \
118  c->weight_h264_pixels_tab[0]= FUNC(weight_h264_pixels16, depth);\
119  c->weight_h264_pixels_tab[1]= FUNC(weight_h264_pixels8, depth);\
120  c->weight_h264_pixels_tab[2]= FUNC(weight_h264_pixels4, depth);\
121  c->weight_h264_pixels_tab[3]= FUNC(weight_h264_pixels2, depth);\
122  c->biweight_h264_pixels_tab[0]= FUNC(biweight_h264_pixels16, depth);\
123  c->biweight_h264_pixels_tab[1]= FUNC(biweight_h264_pixels8, depth);\
124  c->biweight_h264_pixels_tab[2]= FUNC(biweight_h264_pixels4, depth);\
125  c->biweight_h264_pixels_tab[3]= FUNC(biweight_h264_pixels2, depth);\
126 \
127  c->h264_v_loop_filter_luma= FUNC(h264_v_loop_filter_luma, depth);\
128  c->h264_h_loop_filter_luma= FUNC(h264_h_loop_filter_luma, depth);\
129  c->h264_h_loop_filter_luma_mbaff= FUNC(h264_h_loop_filter_luma_mbaff, depth);\
130  c->h264_v_loop_filter_luma_intra= FUNC(h264_v_loop_filter_luma_intra, depth);\
131  c->h264_h_loop_filter_luma_intra= FUNC(h264_h_loop_filter_luma_intra, depth);\
132  c->h264_h_loop_filter_luma_mbaff_intra= FUNC(h264_h_loop_filter_luma_mbaff_intra, depth);\
133  c->h264_v_loop_filter_chroma= FUNC(h264_v_loop_filter_chroma, depth);\
134  if (chroma_format_idc <= 1)\
135  c->h264_h_loop_filter_chroma= FUNC(h264_h_loop_filter_chroma, depth);\
136  else\
137  c->h264_h_loop_filter_chroma= FUNC(h264_h_loop_filter_chroma422, depth);\
138  if (chroma_format_idc <= 1)\
139  c->h264_h_loop_filter_chroma_mbaff= FUNC(h264_h_loop_filter_chroma_mbaff, depth);\
140  else\
141  c->h264_h_loop_filter_chroma_mbaff= FUNC(h264_h_loop_filter_chroma422_mbaff, depth);\
142  c->h264_v_loop_filter_chroma_intra= FUNC(h264_v_loop_filter_chroma_intra, depth);\
143  if (chroma_format_idc <= 1)\
144  c->h264_h_loop_filter_chroma_intra= FUNC(h264_h_loop_filter_chroma_intra, depth);\
145  else\
146  c->h264_h_loop_filter_chroma_intra= FUNC(h264_h_loop_filter_chroma422_intra, depth);\
147  if (chroma_format_idc <= 1)\
148  c->h264_h_loop_filter_chroma_mbaff_intra= FUNC(h264_h_loop_filter_chroma_mbaff_intra, depth);\
149  else\
150  c->h264_h_loop_filter_chroma_mbaff_intra= FUNC(h264_h_loop_filter_chroma422_mbaff_intra, depth);\
151  c->h264_loop_filter_strength= NULL;
152 
153  switch (bit_depth) {
154  case 9:
155  H264_DSP(9);
156  break;
157  case 10:
158  H264_DSP(10);
159  break;
160  default:
161  H264_DSP(8);
162  break;
163  }
165 
166  if (ARCH_AARCH64) ff_h264dsp_init_aarch64(c, bit_depth, chroma_format_idc);
167  if (ARCH_ARM) ff_h264dsp_init_arm(c, bit_depth, chroma_format_idc);
168  if (ARCH_PPC) ff_h264dsp_init_ppc(c, bit_depth, chroma_format_idc);
169  if (ARCH_X86) ff_h264dsp_init_x86(c, bit_depth, chroma_format_idc);
170 }