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https://github.com/FFmpeg/FFmpeg.git
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45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavcodec/dsputil.h"
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#include "fft.h"
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av_cold void ff_fft_init_mmx(FFTContext *s)
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{
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#if HAVE_YASM
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int has_vectors = mm_support();
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if (has_vectors & FF_MM_SSE && HAVE_SSE) {
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/* SSE for P3/P4/K8 */
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s->imdct_calc = ff_imdct_calc_sse;
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s->imdct_half = ff_imdct_half_sse;
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s->fft_permute = ff_fft_permute_sse;
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s->fft_calc = ff_fft_calc_sse;
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} else if (has_vectors & FF_MM_3DNOWEXT && HAVE_AMD3DNOWEXT) {
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/* 3DNowEx for K7 */
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s->imdct_calc = ff_imdct_calc_3dn2;
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s->imdct_half = ff_imdct_half_3dn2;
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s->fft_calc = ff_fft_calc_3dn2;
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} else if (has_vectors & FF_MM_3DNOW && HAVE_AMD3DNOW) {
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/* 3DNow! for K6-2/3 */
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s->imdct_calc = ff_imdct_calc_3dn;
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s->imdct_half = ff_imdct_half_3dn;
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s->fft_calc = ff_fft_calc_3dn;
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}
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#endif
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}
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