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libavfilter
x86
af_volume_init.c
Go to the documentation of this file.
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
config.h
"
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#include "
libavutil/attributes.h
"
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#include "
libavutil/cpu.h
"
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#include "
libavutil/samplefmt.h
"
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#include "
libavutil/x86/cpu.h
"
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#include "
libavfilter/af_volume.h
"
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void
ff_scale_samples_s16_sse2
(
uint8_t
*dst,
const
uint8_t
*
src
,
int
len
,
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int
volume);
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void
ff_scale_samples_s32_sse2
(
uint8_t
*dst,
const
uint8_t
*
src
,
int
len
,
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int
volume);
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void
ff_scale_samples_s32_ssse3_atom
(
uint8_t
*dst,
const
uint8_t
*
src
,
int
len
,
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int
volume);
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void
ff_scale_samples_s32_avx
(
uint8_t
*dst,
const
uint8_t
*
src
,
int
len
,
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int
volume);
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av_cold
void
ff_volume_init_x86
(
VolumeContext
*vol)
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{
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int
cpu_flags =
av_get_cpu_flags
();
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enum
AVSampleFormat
sample_fmt =
av_get_packed_sample_fmt
(vol->
sample_fmt
);
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if
(sample_fmt ==
AV_SAMPLE_FMT_S16
) {
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if
(
EXTERNAL_SSE2
(cpu_flags) && vol->
volume_i
< 32768) {
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vol->
scale_samples
=
ff_scale_samples_s16_sse2
;
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vol->
samples_align
= 8;
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}
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}
else
if
(sample_fmt ==
AV_SAMPLE_FMT_S32
) {
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if
(
EXTERNAL_SSE2
(cpu_flags)) {
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vol->
scale_samples
=
ff_scale_samples_s32_sse2
;
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vol->
samples_align
= 4;
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}
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if
(
EXTERNAL_SSSE3
(cpu_flags) && cpu_flags &
AV_CPU_FLAG_ATOM
) {
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vol->
scale_samples
=
ff_scale_samples_s32_ssse3_atom
;
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vol->
samples_align
= 4;
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}
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if
(
EXTERNAL_AVX
(cpu_flags)) {
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vol->
scale_samples
=
ff_scale_samples_s32_avx
;
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vol->
samples_align
= 8;
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}
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}
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}
ff_scale_samples_s16_sse2
void ff_scale_samples_s16_sse2(uint8_t *dst, const uint8_t *src, int len, int volume)
cpu.h
samplefmt.h
attributes.h
Macro definitions for various function/variable attributes.
VolumeContext::volume_i
int volume_i
Definition:
af_volume.h:81
config.h
uint8_t
uint8_t
Definition:
audio_convert.c:194
av_cold
#define av_cold
Definition:
attributes.h:74
AV_CPU_FLAG_ATOM
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition:
cpu.h:42
VolumeContext::samples_align
int samples_align
Definition:
af_volume.h:88
VolumeContext::scale_samples
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition:
af_volume.h:86
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition:
cpu.h:50
AV_SAMPLE_FMT_S32
signed 32 bits
Definition:
samplefmt.h:63
af_volume.h
audio volume filter
ff_scale_samples_s32_avx
void ff_scale_samples_s32_avx(uint8_t *dst, const uint8_t *src, int len, int volume)
ff_scale_samples_s32_ssse3_atom
void ff_scale_samples_s32_ssse3_atom(uint8_t *dst, const uint8_t *src, int len, int volume)
ff_volume_init_x86
av_cold void ff_volume_init_x86(VolumeContext *vol)
Definition:
af_volume_init.c:36
VolumeContext::sample_fmt
enum AVSampleFormat sample_fmt
Definition:
af_volume.h:84
VolumeContext
Definition:
af_volume.h:68
src
AVS_Value src
Definition:
avisynth_c.h:524
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition:
samplefmt.h:59
cpu.h
ff_scale_samples_s32_sse2
void ff_scale_samples_s32_sse2(uint8_t *dst, const uint8_t *src, int len, int volume)
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition:
cpu.h:52
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:75
av_get_packed_sample_fmt
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
Definition:
samplefmt.c:73
AV_SAMPLE_FMT_S16
signed 16 bits
Definition:
samplefmt.h:62
len
int len
Definition:
vorbis_enc_data.h:452
EXTERNAL_AVX
#define EXTERNAL_AVX(flags)
Definition:
cpu.h:55
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