| 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 | } |