fft.cc File Reference

#include <cmath>
#include "sigpr/EST_fft.h"
#include "EST_math.h"
#include "EST_error.h"

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Macros
#define	PI8   0.392699081698724 /* PI / 8.0 */
#define	RT2   1.4142135623731 /* sqrt(2.0) */
#define	IRT2   0.707106781186548 /* 1.0/sqrt(2.0) */
#define	signum(i)   (i < 0 ? -1 : i == 0 ? 0 : 1)
#define	l15   l[0]
#define	l14   l[1]
#define	l13   l[2]
#define	l12   l[3]
#define	l11   l[4]
#define	l10   l[5]
#define	l9   l[6]
#define	l8   l[7]
#define	l7   l[8]
#define	l6   l[9]
#define	l5   l[10]
#define	l4   l[11]
#define	l3   l[12]
#define	l2   l[13]
#define	l1   l[14]

Functions
int	slowFFT (EST_FVector &real, EST_FVector &imag)
	Basic in-place FFT. More...
int	slowIFFT (EST_FVector &real, EST_FVector &imag)
	Basic inverse in-place FFT. More...
int	energy_spectrum (EST_FVector &real, EST_FVector &imag)
int	power_spectrum_slow (EST_FVector &real, EST_FVector &imag)
	Power spectrum using the slowFFT function. More...
int	power_spectrum (EST_FVector &real, EST_FVector &imag)
	Power spectrum using the fastFFT function. More...
int	fastFFT (EST_FVector &invec)
	Fast FFT An optimised implementation by Tony Robinson to be used in preference to slowFFT. More...
int	fastlog2 (int n)

Macro Definition Documentation

#define PI8   0.392699081698724 /* PI / 8.0 */

Definition at line 47 of file fft.cc.

#define RT2   1.4142135623731 /* sqrt(2.0) */

Definition at line 48 of file fft.cc.

#define IRT2   0.707106781186548 /* 1.0/sqrt(2.0) */

Definition at line 49 of file fft.cc.

#define signum

(

i

)

(i < 0 ? -1 : i == 0 ? 0 : 1)

Definition at line 254 of file fft.cc.

#define l15   l[0]

#define l14   l[1]

#define l13   l[2]

#define l12   l[3]

#define l11   l[4]

#define l10   l[5]

#define l9   l[6]

#define l8   l[7]

#define l7   l[8]

#define l6   l[9]

#define l5   l[10]

#define l4   l[11]

#define l3   l[12]

#define l2   l[13]

#define l1   l[14]

Function Documentation

int energy_spectrum	(	EST_FVector &	real,
		EST_FVector &	imag
	)

Definition at line 197 of file fft.cc.