FFmpeg
fft_init_arm.c
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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 
28 
31 
33 
37 
39 {
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 }
ff_fft_calc_neon
void ff_fft_calc_neon(FFTContext *s, FFTComplex *z)
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
ff_imdct_half_vfp
void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input)
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:96
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
ff_imdct_calc_neon
void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input)
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_mdct_calc_neon
void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input)
ff_fft_init_arm
av_cold void ff_fft_init_arm(FFTContext *s)
Definition: fft_init_arm.c:38
ff_fft_calc_vfp
void ff_fft_calc_vfp(FFTContext *s, FFTComplex *z)
cpu.h
FFTSample
float FFTSample
Definition: avfft.h:35
ff_imdct_half_neon
void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input)
cpu.h
have_neon
#define have_neon(flags)
Definition: cpu.h:26
attributes.h
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
FFTContext
Definition: fft.h:75
FF_MDCT_PERM_INTERLEAVE
@ FF_MDCT_PERM_INTERLEAVE
Definition: fft.h:72
fft.h
ff_fft_permute_neon
void ff_fft_permute_neon(FFTContext *s, FFTComplex *z)
have_vfp_vm
#define have_vfp_vm(flags)
Definition: cpu.h:35
FFTComplex
Definition: avfft.h:37