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) {
38  if (EXTERNAL_SSSE3(cpu_flags)) {
40  }
41  if (EXTERNAL_AVX2_FAST(cpu_flags)) {
43  }
44  } else if (step[i] == 2) {
45  if (EXTERNAL_SSSE3(cpu_flags)) {
47  }
48  if (EXTERNAL_AVX2_FAST(cpu_flags)) {
50  }
51  }
52  }
53 }
void ff_hflip_byte_avx2(const uint8_t *src, uint8_t *dst, int w)
static atomic_int cpu_flags
Definition: cpu.c:50
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
uint8_t
#define av_cold
Definition: attributes.h:82
#define EXTERNAL_AVX2_FAST(flags)
Definition: cpu.h:79
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
av_cold void ff_hflip_init_x86(FlipContext *s, int step[4], int nb_planes)
Definition: vf_hflip_init.c:31
void ff_hflip_short_ssse3(const uint8_t *src, uint8_t *dst, int w)
void ff_hflip_short_avx2(const uint8_t *src, uint8_t *dst, int w)
uint8_t w
Definition: llviddspenc.c:38
#define s(width, name)
Definition: cbs_vp9.c:257
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
void(* flip_line[4])(const uint8_t *src, uint8_t *dst, int w)
Definition: hflip.h:33
void ff_hflip_byte_ssse3(const uint8_t *src, uint8_t *dst, int w)
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