Merge commit 'fd9212f2edfe9b107c3c08ba2df5fd2cba5ab9e3'
[ffmpeg.git] / libavcodec / x86 / fft_init.c
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
27 av_cold void ff_fft_init_x86(FFTContext *s)
28 {
29     int cpu_flags = av_get_cpu_flags();
30
31     if (s->nbits > 16)
32         return;
33
34 #if ARCH_X86_32
35     if (EXTERNAL_AMD3DNOW(cpu_flags)) {
36         s->imdct_calc = ff_imdct_calc_3dnow;
37         s->imdct_half = ff_imdct_half_3dnow;
38         s->fft_calc   = ff_fft_calc_3dnow;
39     }
40
41     if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) {
42         s->imdct_calc = ff_imdct_calc_3dnowext;
43         s->imdct_half = ff_imdct_half_3dnowext;
44         s->fft_calc   = ff_fft_calc_3dnowext;
45     }
46 #endif /* ARCH_X86_32 */
47
48     if (EXTERNAL_SSE(cpu_flags)) {
49         s->imdct_calc  = ff_imdct_calc_sse;
50         s->imdct_half  = ff_imdct_half_sse;
51         s->fft_permute = ff_fft_permute_sse;
52         s->fft_calc    = ff_fft_calc_sse;
53         s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
54     }
55
56     if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) {
57         s->imdct_half      = ff_imdct_half_avx;
58         s->fft_calc        = ff_fft_calc_avx;
59         s->fft_permutation = FF_FFT_PERM_AVX;
60     }
61 }