FFmpeg
vf_hflip_init.c
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1 /*
2  * Copyright (c) 2017 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 "libavutil/attributes.h"
22 #include "libavutil/cpu.h"
23 #include "libavutil/x86/cpu.h"
24 #include "libavfilter/hflip.h"
25 
26 void ff_hflip_byte_ssse3(const uint8_t *src, uint8_t *dst, int w);
27 void ff_hflip_byte_avx2(const uint8_t *src, uint8_t *dst, int w);
28 void ff_hflip_short_ssse3(const uint8_t *src, uint8_t *dst, int w);
29 void ff_hflip_short_avx2(const uint8_t *src, uint8_t *dst, int w);
30 
31 av_cold void ff_hflip_init_x86(FlipContext *s, int step[4], int nb_planes)
32 {
34  int i;
35 
36  for (i = 0; i < nb_planes; i++) {
37  if (step[i] == 1) {
39  s->flip_line[i] = ff_hflip_byte_ssse3;
40  }
42  s->flip_line[i] = ff_hflip_byte_avx2;
43  }
44  } else if (step[i] == 2) {
46  s->flip_line[i] = ff_hflip_short_ssse3;
47  }
49  s->flip_line[i] = ff_hflip_short_avx2;
50  }
51  }
52  }
53 }
ff_hflip_byte_ssse3
void ff_hflip_byte_ssse3(const uint8_t *src, uint8_t *dst, int w)
cpu.h
EXTERNAL_AVX2_FAST
#define EXTERNAL_AVX2_FAST(flags)
Definition: cpu.h:79
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
w
uint8_t w
Definition: llviddspenc.c:38
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
s
#define s(width, name)
Definition: cbs_vp9.c:257
src
#define src
Definition: vp8dsp.c:255
ff_hflip_byte_avx2
void ff_hflip_byte_avx2(const uint8_t *src, uint8_t *dst, int w)
cpu.h
hflip.h
attributes.h
i
int i
Definition: input.c:406
ff_hflip_short_avx2
void ff_hflip_short_avx2(const uint8_t *src, uint8_t *dst, int w)
FlipContext
Definition: hflip.h:27
ff_hflip_init_x86
av_cold void ff_hflip_init_x86(FlipContext *s, int step[4], int nb_planes)
Definition: vf_hflip_init.c:31
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
ff_hflip_short_ssse3
void ff_hflip_short_ssse3(const uint8_t *src, uint8_t *dst, int w)