2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/attributes.h"
22 #include "libavutil/cpu.h"
23 #include "libavutil/arm/cpu.h"
25 #include "libavcodec/fft.h"
27 void ff_fft_calc_vfp(FFTContext *s, FFTComplex *z);
29 void ff_fft_permute_neon(FFTContext *s, FFTComplex *z);
30 void ff_fft_calc_neon(FFTContext *s, FFTComplex *z);
32 void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input);
34 void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
35 void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
36 void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
38 av_cold void ff_fft_init_arm(FFTContext *s)
40 int cpu_flags = av_get_cpu_flags();
42 if (have_vfp_vm(cpu_flags)) {
43 s->fft_calc = ff_fft_calc_vfp;
45 s->imdct_half = ff_imdct_half_vfp;
49 if (have_neon(cpu_flags)) {
51 s->fft_permute = ff_fft_permute_neon;
52 s->fft_calc = ff_fft_calc_neon;
55 s->imdct_calc = ff_imdct_calc_neon;
56 s->imdct_half = ff_imdct_half_neon;
57 s->mdct_calc = ff_mdct_calc_neon;
58 s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;