QtiPlot  0.9.8.2
fft2D.h
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1 /***************************************************************************
2  File : fft2D.h
3  Project : QtiPlot
4  --------------------------------------------------------------------
5  Copyright : (C) 2007 by Ion Vasilief
6  Email (use @ for *) : ion_vasilief*yahoo.fr
7  Description : FFT for matrices
8 
9  ***************************************************************************/
10 
11 /***************************************************************************
12  * *
13  * This program is free software; you can redistribute it and/or modify *
14  * it under the terms of the GNU General Public License as published by *
15  * the Free Software Foundation; either version 2 of the License, or *
16  * (at your option) any later version. *
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18  * This program is distributed in the hope that it will be useful, *
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of *
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
21  * GNU General Public License for more details. *
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23  * You should have received a copy of the GNU General Public License *
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25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, *
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29 
30 #ifndef FOURIER_H
31 #define FOURIER_H
32 
33 void fft2d(double **xtre, double **xtim, int width, int height, bool shift = true);
34 void fft2d_inv(double **xtre, double **xtim, double **xrec_re, double **xrec_im, int width, int height, bool undoShift = true);
35 
36 bool isPower2(int n);
37 int next2Power(int n);
38 #endif