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2ba45a60 DM |
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 | #include "libavutil/attributes.h" | |
21 | #include "libavutil/cpu.h" | |
22 | #include "libavutil/x86/cpu.h" | |
23 | #include "fft.h" | |
24 | ||
25 | av_cold void ff_fft_init_x86(FFTContext *s) | |
26 | { | |
27 | int cpu_flags = av_get_cpu_flags(); | |
28 | ||
29 | #if ARCH_X86_32 | |
30 | if (EXTERNAL_AMD3DNOW(cpu_flags)) { | |
31 | /* 3DNow! for K6-2/3 */ | |
32 | s->imdct_calc = ff_imdct_calc_3dnow; | |
33 | s->imdct_half = ff_imdct_half_3dnow; | |
34 | s->fft_calc = ff_fft_calc_3dnow; | |
35 | } | |
36 | if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) { | |
37 | /* 3DNowEx for K7 */ | |
38 | s->imdct_calc = ff_imdct_calc_3dnowext; | |
39 | s->imdct_half = ff_imdct_half_3dnowext; | |
40 | s->fft_calc = ff_fft_calc_3dnowext; | |
41 | } | |
42 | #endif | |
43 | if (EXTERNAL_SSE(cpu_flags)) { | |
44 | /* SSE for P3/P4/K8 */ | |
45 | s->imdct_calc = ff_imdct_calc_sse; | |
46 | s->imdct_half = ff_imdct_half_sse; | |
47 | s->fft_permute = ff_fft_permute_sse; | |
48 | s->fft_calc = ff_fft_calc_sse; | |
49 | s->fft_permutation = FF_FFT_PERM_SWAP_LSBS; | |
50 | } | |
51 | if (EXTERNAL_AVX(cpu_flags) && s->nbits >= 5) { | |
52 | /* AVX for SB */ | |
53 | s->imdct_half = ff_imdct_half_avx; | |
54 | s->fft_calc = ff_fft_calc_avx; | |
55 | s->fft_permutation = FF_FFT_PERM_AVX; | |
56 | } | |
57 | } |