FFT.c File Reference

Go to the source code of this file.

Defines
#define	TRUE   1
#define	FALSE   0
#define	PI   3.1415926
#define	FFT_DATA_TYPE   float
#define	fft   fft32
#define	FFT_DATA_TYPE   double
Functions
static int	setup_tables (int log2size)
int	fft (double re[], double im[], int log2size, int inverse)
Variables
static double *	sintab = NULL
static int *	bitrevtab = NULL
static int	lastlog = (-1)
static int	lastalloc = 0

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Define Documentation

#define FALSE   0

Definition at line 22 of file FFT.c.

#define fft   fft32

Definition at line 77 of file FFT.c.

#define FFT_DATA_TYPE   double

Definition at line 82 of file FFT.c.

#define FFT_DATA_TYPE   float

Definition at line 82 of file FFT.c.

#define PI   3.1415926

Definition at line 28 of file FFT.c.

#define TRUE   1

FFT.C ---- a complex in-place FFT routine

Definition at line 19 of file FFT.c.

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Function Documentation

int fft	(	double	re[],
		double	im[],
		int	log2size,
		int	inverse
	)

FFT.H ---- fft routine prototype declaration

Definition at line 86 of file FFT.c.

static int setup_tables

(

int

log2size

)

[static]

Definition at line 41 of file FFT.c.

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Variable Documentation

int* bitrevtab = NULL [static]

Definition at line 33 of file FFT.c.

int lastalloc = 0 [static]

Definition at line 35 of file FFT.c.

int lastlog = (-1) [static]

Definition at line 34 of file FFT.c.

double* sintab = NULL [static]

Definition at line 32 of file FFT.c.