AudioFFT Class Reference

Performs 1D FFTs. More...

Public Member Functions
	AudioFFT ()
	Constructor.
void	fft (const float *data, float *re, float *im)
	Performs the forward FFT. More...
void	ifft (float *data, const float *re, const float *im)
	Performs the inverse FFT. More...
void	init (size_t size)
	Initializes the FFT object. More...
	~AudioFFT ()
	Destructor.

Static Public Member Functions
static size_t	ComplexSize (size_t size)
	Calculates the necessary size of the real/imaginary complex arrays. More...

Detailed Description

Performs 1D FFTs.

Member Function Documentation

size_t ComplexSize ( size_t  size )

static

Calculates the necessary size of the real/imaginary complex arrays.

Parameters

size	The size of the real data

Returns

The size of the real/imaginary complex arrays

void fft	(	const float *	data,
		float *	re,
		float *	im
	)

Performs the forward FFT.

Parameters

data	The real input data (has to be of the length as specified in init())
re	The real part of the complex output (has to be of length as returned by ComplexSize())
im	The imaginary part of the complex output (has to be of length as returned by ComplexSize())

void ifft	(	float *	data,
		const float *	re,
		const float *	im
	)

Performs the inverse FFT.

Parameters

data	The real output data (has to be of the length as specified in init())
re	The real part of the complex input (has to be of length as returned by ComplexSize())
im	The imaginary part of the complex input (has to be of length as returned by ComplexSize())

void init

(

size_t

size

)

Initializes the FFT object.

Parameters

size	Size of the real input (must be power 2)