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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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}
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1.8.2