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/*
Fast Fourier/Cosine/Sine Transform
Copyright Takuya OOURA, 1996-2001
(Email: ooura@kurims.kyoto-u.ac.jp or ooura@mmm.t.u-tokyo.ac.jp)
You may use, copy, modify and distribute this code for any
purpose (include commercial use) and without fee.
http://momonga.t.u-tokyo.ac.jp/~ooura/fft.html
*/
#ifndef fftsg_h
#define fftsg_h
#include "drc.h"
#ifdef __cplusplus
extern "C" {
#endif
#define OouraForward (-1)
#define OouraBackward (1)
#define OouraRForward (1)
#define OouraRBackward (-1)
void cdft(int nx2, int dir, DRCFloat * data, int * ip, DRCFloat * w);
void rdft(int n, int dir, DRCFloat * data, int * ip, DRCFloat * w);
void ddct(int n, int dir, DRCFloat * data, int * ip, DRCFloat * w);
void ddst(int n, int dir, DRCFloat * data, int * ip, DRCFloat * w);
void dfct(int n, DRCFloat *a, DRCFloat *t, int *ip, DRCFloat *w);
void dfst(int n, DRCFloat *a, DRCFloat *t, int *ip, DRCFloat *w);
#ifdef __cplusplus
}
#endif
#endif
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