Libav
libavcodec
x86
mdct_init.c
Go to the documentation of this file.
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/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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/x86/cpu.h
"
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#include "
mdct.h
"
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av_cold
void
ff_mdct_init_x86
(
FFTContext
*s)
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{
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int
cpu_flags =
av_get_cpu_flags
();
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#if ARCH_X86_32
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if
(
EXTERNAL_AMD3DNOW
(cpu_flags)) {
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s->
imdct_calc
=
ff_imdct_calc_3dnow
;
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s->
imdct_half
=
ff_imdct_half_3dnow
;
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}
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if
(
EXTERNAL_AMD3DNOWEXT
(cpu_flags)) {
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s->
imdct_calc
=
ff_imdct_calc_3dnowext
;
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s->
imdct_half
=
ff_imdct_half_3dnowext
;
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}
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#endif
/* ARCH_X86_32 */
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if
(
EXTERNAL_SSE
(cpu_flags)) {
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s->
imdct_calc
=
ff_imdct_calc_sse
;
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s->
imdct_half
=
ff_imdct_half_sse
;
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}
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if
(
EXTERNAL_AVX_FAST
(cpu_flags) && s->
nbits
>= 5) {
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s->
imdct_half
=
ff_imdct_half_avx
;
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}
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}
ff_imdct_half_3dnowext
void ff_imdct_half_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input)
mdct.h
ff_imdct_calc_3dnow
void ff_imdct_calc_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input)
cpu.h
EXTERNAL_SSE
#define EXTERNAL_SSE(flags)
Definition:
cpu.h:57
ff_imdct_calc_3dnowext
void ff_imdct_calc_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input)
attributes.h
Macro definitions for various function/variable attributes.
ff_imdct_half_3dnow
void ff_imdct_half_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input)
config.h
av_cold
#define av_cold
Definition:
attributes.h:66
ff_mdct_init_x86
av_cold void ff_mdct_init_x86(FFTContext *s)
Definition:
mdct_init.c:27
EXTERNAL_AVX_FAST
#define EXTERNAL_AVX_FAST(flags)
Definition:
cpu.h:70
ff_imdct_half_avx
void ff_imdct_half_avx(FFTContext *s, FFTSample *output, const FFTSample *input)
FFTContext::imdct_calc
void(* imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition:
fft.h:92
EXTERNAL_AMD3DNOWEXT
#define EXTERNAL_AMD3DNOWEXT(flags)
Definition:
cpu.h:54
FFTContext
Definition:
fft.h:73
FFTContext::nbits
int nbits
Definition:
fft.h:74
ff_imdct_half_sse
void ff_imdct_half_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
cpu.h
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:47
FFTContext::imdct_half
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition:
fft.h:93
ff_imdct_calc_sse
void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
EXTERNAL_AMD3DNOW
#define EXTERNAL_AMD3DNOW(flags)
Definition:
cpu.h:53
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