fft.c
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/cpu.h"
20 #include "libavcodec/dsputil.h"
21 #include "libavcodec/dct.h"
22 #include "fft.h"
23 
25 {
26 #if HAVE_YASM
27  int has_vectors = av_get_cpu_flags();
28  if (has_vectors & AV_CPU_FLAG_AVX && HAVE_AVX && s->nbits >= 5) {
29  /* AVX for SB */
35  } else if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE) {
36  /* SSE for P3/P4/K8 */
42  }
43 #endif
44 }
45 
46 #if CONFIG_DCT
48 {
49 #if HAVE_YASM
50  int has_vectors = av_get_cpu_flags();
51  if (has_vectors & AV_CPU_FLAG_AVX && HAVE_AVX)
53  else if (has_vectors & AV_CPU_FLAG_SSE2 && HAVE_SSE)
55  else if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE)
57 #endif
58 }
59 #endif
60 
#define AV_CPU_FLAG_AVX
AVX functions: requires OS support even if YMM registers aren't used.
Definition: cpu.h:40
void ff_fft_calc_avx(FFTContext *s, FFTComplex *z)
#define AV_CPU_FLAG_SSE
SSE functions.
Definition: cpu.h:30
void(* fft_permute)(struct FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling fft_calc().
Definition: fft.h:75
void ff_dct32_float_avx(FFTSample *out, const FFTSample *in)
#define HAVE_SSE
Definition: config.h:48
void ff_dct32_float_sse2(FFTSample *out, const FFTSample *in)
void ff_dct32_float_sse(FFTSample *out, const FFTSample *in)
#define av_cold
Definition: attributes.h:71
void ff_dct_init_mmx(DCTContext *s)
void ff_fft_calc_sse(FFTContext *s, FFTComplex *z)
Definition: fft_sse.c:41
void(* imdct_calc)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:81
Definition: fft.h:62
int nbits
Definition: fft.h:63
Definition: dct.h:29
int fft_permutation
Definition: fft.h:85
#define FF_FFT_PERM_SWAP_LSBS
Definition: fft.h:87
av_cold void ff_fft_init_mmx(FFTContext *s)
Definition: fft.c:24
void ff_imdct_calc_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft_sse.c:83
void ff_imdct_half_sse(FFTContext *s, FFTSample *output, const FFTSample *input)
#define FF_FFT_PERM_AVX
Definition: fft.h:88
void(* dct32)(FFTSample *out, const FFTSample *in)
Definition: dct.h:36
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:82
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:22
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:80
DSP utils.
#define HAVE_AVX
Definition: config.h:41
void ff_fft_permute_sse(FFTContext *s, FFTComplex *z)
Definition: fft_sse.c:66
#define AV_CPU_FLAG_SSE2
PIV SSE2 functions.
Definition: cpu.h:31