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af_volume_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 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 "libavutil/cpu.h"
22 #include "libavutil/samplefmt.h"
23 #include "libavutil/x86/cpu.h"
24 #include "libavfilter/af_volume.h"
25 
26 void ff_scale_samples_s16_sse2(uint8_t *dst, const uint8_t *src, int len,
27  int volume);
28 
29 void ff_scale_samples_s32_sse2(uint8_t *dst, const uint8_t *src, int len,
30  int volume);
32  int volume);
33 void ff_scale_samples_s32_avx(uint8_t *dst, const uint8_t *src, int len,
34  int volume);
35 
37 {
39  enum AVSampleFormat sample_fmt = av_get_packed_sample_fmt(vol->sample_fmt);
40 
41  if (sample_fmt == AV_SAMPLE_FMT_S16) {
42  if (EXTERNAL_SSE2(cpu_flags) && vol->volume_i < 32768) {
44  vol->samples_align = 8;
45  }
46  } else if (sample_fmt == AV_SAMPLE_FMT_S32) {
47  if (EXTERNAL_SSE2(cpu_flags)) {
49  vol->samples_align = 4;
50  }
51  if (EXTERNAL_SSSE3(cpu_flags) && cpu_flags & AV_CPU_FLAG_ATOM) {
53  vol->samples_align = 4;
54  }
55  if (EXTERNAL_AVX_FAST(cpu_flags)) {
57  vol->samples_align = 8;
58  }
59  }
60 }
void ff_scale_samples_s16_sse2(uint8_t *dst, const uint8_t *src, int len, int volume)
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
uint8_t
#define av_cold
Definition: attributes.h:82
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:42
int samples_align
Definition: af_volume.h:88
#define EXTERNAL_AVX_FAST(flags)
Definition: cpu.h:67
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.h:86
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:57
signed 32 bits
Definition: samplefmt.h:62
audio volume filter
void ff_scale_samples_s32_avx(uint8_t *dst, const uint8_t *src, int len, int volume)
void ff_scale_samples_s32_ssse3_atom(uint8_t *dst, const uint8_t *src, int len, int volume)
av_cold void ff_volume_init_x86(VolumeContext *vol)
enum AVSampleFormat sample_fmt
Definition: af_volume.h:84
static int cpu_flags
Definition: cpu.c:47
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
void ff_scale_samples_s32_sse2(uint8_t *dst, const uint8_t *src, int len, int volume)
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:63
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:88
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
Definition: samplefmt.c:75
signed 16 bits
Definition: samplefmt.h:61
int len