www.pudn.com > WinceWave.rar > fft.h

/* 
 * FAAC - Freeware Advanced Audio Coder 
 * $Id: fft.h,v 1.3 2002/08/21 16:52:52 knik Exp $ 
 * Copyright (C) 2002 Krzysztof Nikiel 
 * 
 * This library 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 2.1 of the License, or (at your option) any later version. 
 * 
 * This library 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 this library; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 * 
 */ 
 
#ifndef _FFT_H_ 
#define _FFT_H_ 
 
#ifndef M_PI 
#define M_PI    3.14159265358979323846 
#endif 
 
#ifndef AllocMemory 
#define AllocMemory(x)	malloc((x)) 
#endif 
 
#ifndef FreeMemory 
#define FreeMemory(ptr)	free((ptr)) 
#endif 
 
#ifndef __cplusplus 
extern "C" 
{ 
#endif 
 
void rfft(double *x, int logm); 
void fft(double *xr, double *xi, int logm); 
void ffti(double *xr, double *xi, int logm); 
 
#ifndef __cplusplus 
} 
#endif 
 
#endif