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/**************************************************************************
* Copyright 2009-2015 Olivier Belanger *
* *
* This file is part of pyo, a python module to help digital signal *
* processing script creation. *
* *
* pyo is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation, either version 3 of the *
* License, or (at your option) any later version. *
* *
* pyo is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with pyo. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
#ifndef _FFT_H
#define _FFT_H
#include "pyomodule.h"
/* in-place split-radix real fft */
void realfft_split(MYFLT *data, MYFLT *outdata, int n, MYFLT **twiddle);
void irealfft_split(MYFLT *data, MYFLT *outdata, int n, MYFLT **twiddle);
void fft_compute_split_twiddle(MYFLT **twiddle, int size);
void fft_compute_window(MYFLT *window, int size, int wintype);
/* in-place radix-2 real fft (not used actually) */
void realfft_packed(MYFLT *data, MYFLT *outdata, int size, MYFLT *twiddle);
void irealfft_packed(MYFLT *data, MYFLT *outdata, int size, MYFLT *twiddle);
/* Prototype for array generation of twiddle factors */
void fft_compute_split_twiddle(MYFLT **twiddle, int size);
void fft_compute_radix2_twiddle(MYFLT *twiddle, int size);
#endif // _FFT_H
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