fft.h

   1 /*
   2   ZynAddSubFX - a software synthesizer
   3
   4   FFTwrapper.h  -  A wrapper for Fast Fourier Transforms
   5   Copyright (C) 2002-2005 Nasca Octavian Paul
   6   Author: Nasca Octavian Paul
   7
   8   This program is free software; you can redistribute it and/or modify
   9   it under the terms of version 2 of the GNU General Public License
  10   as published by the Free Software Foundation.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License (version 2) for more details.
  16
  17   You should have received a copy of the GNU General Public License (version 2)
  18   along with this program; if not, write to the Free Software Foundation,
  19   Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20
  21 */
  22
  23 #ifndef FFT_WRAPPER_H
  24 #define FFT_WRAPPER_H
  25
  26 #include "globals.h"
  27
  28 struct zyn_fft_freqs
  29 {
  30   zyn_sample_type *s,*c;               /* sine and cosine components */
  31 };
  32
  33 typedef void * zyn_fft_handle;
  34
  35 #ifdef __cplusplus
  36 extern "C" {
  37 #endif
  38 #if 0
  39 } /* Adjust editor indent */
  40 #endif
  41
  42 void
  43 zyn_fft_freqs_init(
  44   struct zyn_fft_freqs * f,
  45   int size);
  46
  47 void
  48 zyn_fft_freqs_uninit(
  49   struct zyn_fft_freqs * f);
  50
  51 zyn_fft_handle
  52 zyn_fft_create(
  53   int fftsize);
  54
  55 void
  56 zyn_fft_destroy(
  57   zyn_fft_handle handle);
  58
  59 void
  60 zyn_fft_smps2freqs(
  61   zyn_fft_handle handle,
  62   REALTYPE * smps,
  63   struct zyn_fft_freqs * freqs_ptr);
  64
  65 void
  66 zyn_fft_freqs2smps(
  67   zyn_fft_handle handle,
  68   struct zyn_fft_freqs * freqs_ptr,
  69   REALTYPE * smps);
  70
  71 #if 0
  72 { /* Adjust editor indent */
  73 #endif
  74 #ifdef __cplusplus
  75 } /* extern "C" */
  76 #endif
  77
  78 #endif
  79