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 25av_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} 58