FFmpeg
fft_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 
21 #include "libavutil/attributes.h"
22 #include "libavutil/cpu.h"
23 #include "libavutil/x86/cpu.h"
24 
25 #include "fft.h"
26 
28 {
30 
31  if (s->nbits > 16)
32  return;
33 
34 #if ARCH_X86_32
35  if (EXTERNAL_AMD3DNOW(cpu_flags)) {
39  }
40 
41  if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
45  }
46 #endif /* ARCH_X86_32 */
47 
48  if (EXTERNAL_SSE(cpu_flags)) {
54  }
55 
56  if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) {
60  }
61 }
void ff_fft_calc_avx(FFTContext *s, FFTComplex *z)
void ff_imdct_half_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input)
static atomic_int cpu_flags
Definition: cpu.c:50
#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
void ff_imdct_half_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input)
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
void ff_fft_calc_3dnow(FFTContext *s, FFTComplex *z)
#define EXTERNAL_AVX_FAST(flags)
Definition: cpu.h:71
void ff_fft_calc_sse(FFTContext *s, FFTComplex *z)
void(* fft_permute)(struct FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling fft_calc().
Definition: fft.h:101
void(* imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:107
#define EXTERNAL_AMD3DNOWEXT(flags)
Definition: cpu.h:55
void ff_imdct_calc_3dnowext(FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:88
int nbits
Definition: fft.h:89
#define s(width, name)
Definition: cbs_vp9.c:257
enum fft_permutation_type fft_permutation
Definition: fft.h:111
av_cold void ff_fft_init_x86(FFTContext *s)
Definition: fft_init.c:27
void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
void ff_imdct_half_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
void ff_imdct_calc_3dnow(FFTContext *s, FFTSample *output, const FFTSample *input)
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:108
void ff_fft_calc_3dnowext(FFTContext *s, FFTComplex *z)
void ff_imdct_half_avx(FFTContext *s, FFTSample *output, const FFTSample *input)
void(* fft_calc)(struct FFTContext *s, FFTComplex *z)
Do a complex FFT with the parameters defined in ff_fft_init().
Definition: fft.h:106
void ff_fft_permute_sse(FFTContext *s, FFTComplex *z)
#define EXTERNAL_AMD3DNOW(flags)
Definition: cpu.h:54