2 * This file is part of Libav.
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #include "libavutil/attributes.h"
20 #include "libavutil/cpu.h"
21 #include "libavutil/aarch64/cpu.h"
23 #include "libavcodec/fft.h"
25 void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
26 void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
27 void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
29 av_cold void ff_mdct_init_aarch64(FFTContext *s)
31 int cpu_flags = av_get_cpu_flags();
33 if (have_neon(cpu_flags)) {
34 s->imdct_calc = ff_imdct_calc_neon;
35 s->imdct_half = ff_imdct_half_neon;
36 s->mdct_calc = ff_mdct_calc_neon;
37 s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;