FFmpeg
h264chroma.c
Go to the documentation of this file.
1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "config.h"
20 #include "libavutil/attributes.h"
21 #include "h264chroma.h"
22 
23 #define BIT_DEPTH 8
24 #include "h264chroma_template.c"
25 #undef BIT_DEPTH
26 
27 #define BIT_DEPTH 16
28 #include "h264chroma_template.c"
29 #undef BIT_DEPTH
30 
31 #define SET_CHROMA(depth) \
32  c->put_h264_chroma_pixels_tab[0] = put_h264_chroma_mc8_ ## depth ## _c; \
33  c->put_h264_chroma_pixels_tab[1] = put_h264_chroma_mc4_ ## depth ## _c; \
34  c->put_h264_chroma_pixels_tab[2] = put_h264_chroma_mc2_ ## depth ## _c; \
35  c->put_h264_chroma_pixels_tab[3] = put_h264_chroma_mc1_ ## depth ## _c; \
36  c->avg_h264_chroma_pixels_tab[0] = avg_h264_chroma_mc8_ ## depth ## _c; \
37  c->avg_h264_chroma_pixels_tab[1] = avg_h264_chroma_mc4_ ## depth ## _c; \
38  c->avg_h264_chroma_pixels_tab[2] = avg_h264_chroma_mc2_ ## depth ## _c; \
39  c->avg_h264_chroma_pixels_tab[3] = avg_h264_chroma_mc1_ ## depth ## _c; \
40 
42 {
43  if (bit_depth > 8 && bit_depth <= 16) {
44  SET_CHROMA(16);
45  } else {
46  SET_CHROMA(8);
47  }
48 
49  if (ARCH_AARCH64)
50  ff_h264chroma_init_aarch64(c, bit_depth);
51  if (ARCH_ARM)
52  ff_h264chroma_init_arm(c, bit_depth);
53  if (ARCH_PPC)
54  ff_h264chroma_init_ppc(c, bit_depth);
55  if (ARCH_X86)
56  ff_h264chroma_init_x86(c, bit_depth);
57  if (ARCH_MIPS)
58  ff_h264chroma_init_mips(c, bit_depth);
59 }
av_cold void ff_h264chroma_init(H264ChromaContext *c, int bit_depth)
Definition: h264chroma.c:41
Macro definitions for various function/variable attributes.
void ff_h264chroma_init_ppc(H264ChromaContext *c, int bit_depth)
#define av_cold
Definition: attributes.h:82
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
av_cold void ff_h264chroma_init_aarch64(H264ChromaContext *c, int bit_depth)
av_cold void ff_h264chroma_init_arm(H264ChromaContext *c, int bit_depth)
static void bit_depth(AudioStatsContext *s, uint64_t mask, uint64_t imask, AVRational *depth)
Definition: af_astats.c:226
void ff_h264chroma_init_mips(H264ChromaContext *c, int bit_depth)
void ff_h264chroma_init_x86(H264ChromaContext *c, int bit_depth)
#define SET_CHROMA(depth)
Definition: h264chroma.c:31