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