fft Class Reference

Class for performing fourier transforms using FFTW3. More...

#include <fft.h>

Public Member Functions
	fft (int nBufferFrames)
	Construct the fftw3 plans for the object.
void	executefft (double *inputBuffer)
void	executeInverse_fft (fftw_complex *fourierSpectrum)
	fft (int nBufferFrames)
void	executefft (double *inputBuffer)
void	executeInverse_fft (fftw_complex *fourierSpectrum)
	fft (int nBufferFrames, int samplingRate)
void	executefft (double *inputBuffer)
void	executeInverse_fft (fftw_complex *fourierSpectrum)

Public Attributes
int	nBufferFrames
double *	in
fftw_complex *	out
fftw_complex *	inverse_in
double *	inverse_out
fftw_plan	my_plan
fftw_plan	inverse_plan
double	in [AUDIO_BUFFER_SIZE]
fftw_complex	out [FFT_BUFFER_SIZE]
fftw_complex	inverse_in [FFT_BUFFER_SIZE]
double	inverse_out [AUDIO_BUFFER_SIZE]
int	samplingRate
VoxFilter *	voxFilter

Detailed Description

Class for performing fourier transforms using FFTW3.

Allows for the set-up of a fftw3 plan (the most time consuming part of the process) when the class instantiated, allowing the performance of forward and inverse fast fourier transforms with minimal computational cost inside the RtAudio Callback when the methods are called.

Member Function Documentation

void fft::executefft

(

double *

inputBuffer

)

Execute the forward fourier transform and update generate the frequncy spectrum for the data input

void fft::executeInverse_fft

(

fftw_complex *

fourierSpectrum

)

Execute the inverse fourier transform to reconstruct a time-series signal from the input frequency spectrum. Data is then scaled back to the appropriate size.

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The documentation for this class was generated from the following files:

• /home/travis/build/a2198699s/pitch-perfector/Code/classfiles/fft.h
• /home/travis/build/a2198699s/pitch-perfector/Code/classfiles/fft.cpp