ffmpeg/libavcodec/arm/fft_init_arm.c

   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/arm/cpu.h"
  22 #include "libavcodec/fft.h"
  23 #include "libavcodec/rdft.h"
  24 #include "libavcodec/synth_filter.h"
  25
  26 void ff_fft_calc_vfp(FFTContext *s, FFTComplex *z);
  27
  28 void ff_fft_permute_neon(FFTContext *s, FFTComplex *z);
  29 void ff_fft_calc_neon(FFTContext *s, FFTComplex *z);
  30
  31 void ff_imdct_half_vfp(FFTContext *s, FFTSample *output, const FFTSample *input);
  32
  33 void ff_imdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
  34 void ff_imdct_half_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
  35 void ff_mdct_calc_neon(FFTContext *s, FFTSample *output, const FFTSample *input);
  36
  37 void ff_rdft_calc_neon(struct RDFTContext *s, FFTSample *z);
  38
  39 av_cold void ff_fft_init_arm(FFTContext *s)
  40 {
  41     int cpu_flags = av_get_cpu_flags();
  42
  43     if (have_vfp(cpu_flags) && !have_vfpv3(cpu_flags)) {
  44         s->fft_calc     = ff_fft_calc_vfp;
  45 #if CONFIG_MDCT
  46         s->imdct_half   = ff_imdct_half_vfp;
  47 #endif
  48     }
  49
  50     if (have_neon(cpu_flags)) {
  51 #if CONFIG_FFT
  52         s->fft_permute  = ff_fft_permute_neon;
  53         s->fft_calc     = ff_fft_calc_neon;
  54 #endif
  55 #if CONFIG_MDCT
  56         s->imdct_calc   = ff_imdct_calc_neon;
  57         s->imdct_half   = ff_imdct_half_neon;
  58         s->mdct_calc    = ff_mdct_calc_neon;
  59         s->mdct_permutation = FF_MDCT_PERM_INTERLEAVE;
  60 #endif
  61     }
  62 }
  63
  64 #if CONFIG_RDFT
  65 av_cold void ff_rdft_init_arm(RDFTContext *s)
  66 {
  67     int cpu_flags = av_get_cpu_flags();
  68
  69     if (have_neon(cpu_flags))
  70         s->rdft_calc    = ff_rdft_calc_neon;
  71 }
  72 #endif