2 * This file is part of FFmpeg.
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.
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.
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
19 #include "libavutil/cpu.h"
20 #include "libavcodec/dsputil.h"
23 av_cold void ff_fft_init_mmx(FFTContext *s)
26 int has_vectors = av_get_cpu_flags();
27 if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE) {
28 /* SSE for P3/P4/K8 */
29 s->imdct_calc = ff_imdct_calc_sse;
30 s->imdct_half = ff_imdct_half_sse;
31 s->fft_permute = ff_fft_permute_sse;
32 s->fft_calc = ff_fft_calc_sse;
33 } else if (has_vectors & AV_CPU_FLAG_3DNOWEXT && HAVE_AMD3DNOWEXT) {
35 s->imdct_calc = ff_imdct_calc_3dn2;
36 s->imdct_half = ff_imdct_half_3dn2;
37 s->fft_calc = ff_fft_calc_3dn2;
38 } else if (has_vectors & AV_CPU_FLAG_3DNOW && HAVE_AMD3DNOW) {
39 /* 3DNow! for K6-2/3 */
40 s->imdct_calc = ff_imdct_calc_3dn;
41 s->imdct_half = ff_imdct_half_3dn;
42 s->fft_calc = ff_fft_calc_3dn;
48 av_cold void ff_dct_init_mmx(DCTContext *s)
50 int has_vectors = av_get_cpu_flags();
51 if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE)
52 s->dct32 = ff_dct32_float_sse;