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/libavcodec/arm/fft_init_arm.c

http://github.com/FFmpeg/FFmpeg
C | 61 lines | 33 code | 9 blank | 19 comment | 2 complexity | 4b32d763baabca1aaaac8aab63f4de98 MD5 | raw file
 1/*
 2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
 3 *
 4 * This file is part of FFmpeg.
 5 *
 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.
10 *
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.
15 *
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
19 */
20
21#include "libavutil/attributes.h"
22#include "libavutil/cpu.h"
23#include "libavutil/arm/cpu.h"
24
25#include "libavcodec/fft.h"
26
27void ff_fft_calc_vfp(FFTContext *s, FFTComplex *z);
28
29void ff_fft_permute_neon(FFTContext *s, FFTComplex *z);
30void ff_fft_calc_neon(FFTContext *s, FFTComplex *z);
31
32void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input);
33
34void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
35void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
36void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
37
38av_cold void ff_fft_init_arm(FFTContext *s)
39{
40    int cpu_flags = av_get_cpu_flags();
41
42    if (have_vfp_vm(cpu_flags)) {
43        s->fft_calc     = ff_fft_calc_vfp;
44#if CONFIG_MDCT
45        s->imdct_half   = ff_imdct_half_vfp;
46#endif
47    }
48
49    if (have_neon(cpu_flags)) {
50#if CONFIG_FFT
51        s->fft_permute  = ff_fft_permute_neon;
52        s->fft_calc     = ff_fft_calc_neon;
53#endif
54#if CONFIG_MDCT
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;
59#endif
60    }
61}