FFmpeg
cfhdencdsp_init.c
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1 /*
2  * Copyright (c) 2021 Paul B Mahol
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 #include <stddef.h>
22 #include <stdint.h>
23 
24 #include "config.h"
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/x86/cpu.h"
28 #include "libavcodec/cfhdencdsp.h"
29 
30 void ff_cfhdenc_horiz_filter_sse2(int16_t *input, int16_t *low, int16_t *high,
31  ptrdiff_t in_stride, ptrdiff_t low_stride,
32  ptrdiff_t high_stride,
33  int width, int height);
34 void ff_cfhdenc_vert_filter_sse2(int16_t *input, int16_t *low, int16_t *high,
35  ptrdiff_t in_stride, ptrdiff_t low_stride,
36  ptrdiff_t high_stride,
37  int width, int height);
38 
40 {
42 
43 #if ARCH_X86_64
44  if (EXTERNAL_SSE2(cpu_flags)) {
45  c->horiz_filter = ff_cfhdenc_horiz_filter_sse2;
46  c->vert_filter = ff_cfhdenc_vert_filter_sse2;
47  }
48 #endif
49 }
cpu.h
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:96
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
av_cold
#define av_cold
Definition: attributes.h:90
width
#define width
ff_cfhdenc_horiz_filter_sse2
void ff_cfhdenc_horiz_filter_sse2(int16_t *input, int16_t *low, int16_t *high, ptrdiff_t in_stride, ptrdiff_t low_stride, ptrdiff_t high_stride, int width, int height)
ff_cfhdencdsp_init_x86
av_cold void ff_cfhdencdsp_init_x86(CFHDEncDSPContext *c)
Definition: cfhdencdsp_init.c:39
ff_cfhdenc_vert_filter_sse2
void ff_cfhdenc_vert_filter_sse2(int16_t *input, int16_t *low, int16_t *high, ptrdiff_t in_stride, ptrdiff_t low_stride, ptrdiff_t high_stride, int width, int height)
c
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
cpu.h
cfhdencdsp.h
height
#define height
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
CFHDEncDSPContext
Definition: cfhdencdsp.h:25