| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "config.h" |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/x86/cpu.h" |
| |
| #include "fft.h" |
| |
| av_cold void ff_fft_init_x86(FFTContext *s) |
| { |
| int cpu_flags = av_get_cpu_flags(); |
| |
| if (s->nbits > 16) |
| return; |
| |
| #if ARCH_X86_32 |
| if (EXTERNAL_AMD3DNOW(cpu_flags)) { |
| s->imdct_calc = ff_imdct_calc_3dnow; |
| s->imdct_half = ff_imdct_half_3dnow; |
| s->fft_calc = ff_fft_calc_3dnow; |
| } |
| |
| if (EXTERNAL_AMD3DNOWEXT(cpu_flags)) { |
| s->imdct_calc = ff_imdct_calc_3dnowext; |
| s->imdct_half = ff_imdct_half_3dnowext; |
| s->fft_calc = ff_fft_calc_3dnowext; |
| } |
| #endif /* ARCH_X86_32 */ |
| |
| if (EXTERNAL_SSE(cpu_flags)) { |
| s->imdct_calc = ff_imdct_calc_sse; |
| s->imdct_half = ff_imdct_half_sse; |
| s->fft_permute = ff_fft_permute_sse; |
| s->fft_calc = ff_fft_calc_sse; |
| s->fft_permutation = FF_FFT_PERM_SWAP_LSBS; |
| } |
| |
| if (EXTERNAL_AVX_FAST(cpu_flags) && s->nbits >= 5) { |
| s->imdct_half = ff_imdct_half_avx; |
| s->fft_calc = ff_fft_calc_avx; |
| s->fft_permutation = FF_FFT_PERM_AVX; |
| } |
| } |