FFmpeg
vf_pullup_init.c
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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 General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 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
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * 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 "libavutil/attributes.h"
20 #include "libavutil/cpu.h"
21 #include "libavutil/x86/asm.h"
22 #include "libavutil/x86/cpu.h"
23 #include "libavfilter/vf_pullup.h"
24 
25 int ff_pullup_filter_diff_mmx(const uint8_t *a, const uint8_t *b, ptrdiff_t s);
26 int ff_pullup_filter_comb_mmx(const uint8_t *a, const uint8_t *b, ptrdiff_t s);
27 int ff_pullup_filter_var_mmx (const uint8_t *a, const uint8_t *b, ptrdiff_t s);
28 
30 {
31 #if HAVE_X86ASM
33 
34  if (EXTERNAL_MMX(cpu_flags)) {
38  }
39 #endif
40 }
cpu.h
ff_pullup_filter_comb_mmx
int ff_pullup_filter_comb_mmx(const uint8_t *a, const uint8_t *b, ptrdiff_t s)
b
#define b
Definition: input.c:40
vf_pullup.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
ff_pullup_filter_var_mmx
int ff_pullup_filter_var_mmx(const uint8_t *a, const uint8_t *b, ptrdiff_t s)
av_cold
#define av_cold
Definition: attributes.h:90
ff_pullup_filter_diff_mmx
int ff_pullup_filter_diff_mmx(const uint8_t *a, const uint8_t *b, ptrdiff_t s)
s
#define s(width, name)
Definition: cbs_vp9.c:257
PullupContext
Definition: vf_pullup.h:49
ff_pullup_init_x86
av_cold void ff_pullup_init_x86(PullupContext *s)
Definition: vf_pullup_init.c:29
cpu.h
asm.h
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
attributes.h
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56