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"
21 #include "libavcodec/dct.h"
24 av_cold void ff_fft_init_mmx(FFTContext *s)
27 int has_vectors = av_get_cpu_flags();
28 if (has_vectors & AV_CPU_FLAG_AVX && HAVE_AVX && s->nbits >= 5) {
30 s->imdct_calc = ff_imdct_calc_sse;
31 s->imdct_half = ff_imdct_half_avx;
32 s->fft_permute = ff_fft_permute_sse;
33 s->fft_calc = ff_fft_calc_avx;
34 s->fft_permutation = FF_FFT_PERM_AVX;
35 } else if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE) {
36 /* SSE for P3/P4/K8 */
37 s->imdct_calc = ff_imdct_calc_sse;
38 s->imdct_half = ff_imdct_half_sse;
39 s->fft_permute = ff_fft_permute_sse;
40 s->fft_calc = ff_fft_calc_sse;
41 s->fft_permutation = FF_FFT_PERM_SWAP_LSBS;
42 } else if (has_vectors & AV_CPU_FLAG_3DNOWEXT && HAVE_AMD3DNOWEXT) {
44 s->imdct_calc = ff_imdct_calc_3dn2;
45 s->imdct_half = ff_imdct_half_3dn2;
46 s->fft_calc = ff_fft_calc_3dn2;
47 } else if (has_vectors & AV_CPU_FLAG_3DNOW && HAVE_AMD3DNOW) {
48 /* 3DNow! for K6-2/3 */
49 s->imdct_calc = ff_imdct_calc_3dn;
50 s->imdct_half = ff_imdct_half_3dn;
51 s->fft_calc = ff_fft_calc_3dn;
57 av_cold void ff_dct_init_mmx(DCTContext *s)
60 int has_vectors = av_get_cpu_flags();
61 if (has_vectors & AV_CPU_FLAG_AVX && HAVE_AVX)
62 s->dct32 = ff_dct32_float_avx;
63 else if (has_vectors & AV_CPU_FLAG_SSE2 && HAVE_SSE)
64 s->dct32 = ff_dct32_float_sse2;
65 else if (has_vectors & AV_CPU_FLAG_SSE && HAVE_SSE)
66 s->dct32 = ff_dct32_float_sse;