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 #include "fft.h" 25 ff_fft_init_x86(FFTContext * s)26av_cold void ff_fft_init_x86(FFTContext *s) 27 { 28 int cpu_flags = av_get_cpu_flags(); 29 30 #if ARCH_X86_32 31 #if (HAVE_AMD3DNOW_EXTERNAL == 1) 32 if (EXTERNAL_AMD3DNOW(cpu_flags)) { 33 /* 3DNow! for K6-2/3 */ 34 s->imdct_calc = ff_imdct_calc_3dnow; 35 s->imdct_half = ff_imdct_half_3dnow; 36 s->fft_calc = ff_fft_calc_3dnow; 37 } 38 #endif 39 #if (HAVE_AMD3DNOWEXT_EXTERNAL == 1) 40 if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) { 41 /* 3DNowEx for K7 */ 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 47 #endif 48 #if (HAVE_SSE_EXTERNAL == 1) 49 if (EXTERNAL_SSE(cpu_flags)) { 50 /* SSE for P3/P4/K8 */ 51 s->imdct_calc = ff_imdct_calc_sse; 52 s->imdct_half = ff_imdct_half_sse; 53 s->fft_permute = ff_fft_permute_sse; 54 s->fft_calc = ff_fft_calc_sse; 55 s->fft_permutation = FF_FFT_PERM_SWAP_LSBS; 56 } 57 #endif 58 #if (HAVE_AVX_EXTERNAL == 1) 59 if (EXTERNAL_AVX(cpu_flags) && s->nbits >= 5) { 60 /* AVX for SB */ 61 s->imdct_half = ff_imdct_half_avx; 62 s->fft_calc = ff_fft_calc_avx; 63 s->fft_permutation = FF_FFT_PERM_AVX; 64 } 65 #endif 66 } 67