FFTDriver Class Reference

Abstract Class which defines the basic FFT functionality. More...

#include <AudioFFT.h>

Inheritance diagram for FFTDriver:

Public Member Functions
virtual bool	begin (int len)=0
virtual void	end ()=0
virtual void	fft ()=0
	Perform FFT.
virtual bool	getBin (int pos, FFTBin &bin)
	gets the value of a bin
virtual float	getValue (int pos)=0
	Get result value from Reverse FFT.
virtual bool	isReverseFFT ()
	Returns true if reverse FFT is supported.
virtual bool	isValid ()=0
virtual float	magnitude (int idx)=0
	Calculate the magnitude (fft result) at index (sqr(i² + r²))
virtual float	magnitudeFast (int idx)=0
	Calculate the magnitude w/o sqare root.
virtual void	rfft ()
	Calculate reverse FFT.
virtual bool	setBin (int idx, float real, float img)
	sets the value of a bin
bool	setBin (int pos, FFTBin &bin)
	sets the value of a bin
virtual void	setValue (int pos, float value)=0
	Sets the real value.

Detailed Description

Abstract Class which defines the basic FFT functionality.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

fft()

virtual void fft ( )

pure virtual

Perform FFT.

Implemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

getBin()

virtual bool getBin ( int  pos, FFTBin &  bin  )

inlinevirtual

gets the value of a bin

Reimplemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

getValue()

virtual float getValue ( int  pos )

pure virtual

Get result value from Reverse FFT.

Implemented in FFTDriverESP32FFT, FFTDriverCmsisFFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

isReverseFFT()

virtual bool isReverseFFT ( )

inlinevirtual

Returns true if reverse FFT is supported.

Reimplemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

magnitude()

virtual float magnitude ( int  idx )

pure virtual

Calculate the magnitude (fft result) at index (sqr(i² + r²))

Implemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

magnitudeFast()

virtual float magnitudeFast ( int  idx )

pure virtual

Calculate the magnitude w/o sqare root.

Implemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

rfft()

virtual void rfft ( )

inlinevirtual

Calculate reverse FFT.

Reimplemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

setBin()

virtual bool setBin ( int  idx, float  real, float  img  )

inlinevirtual

sets the value of a bin

Reimplemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

setValue()

virtual void setValue ( int  pos, float  value  )

pure virtual

Sets the real value.

Implemented in FFTDriverCmsisFFT, FFTDriverESP32FFT, FFTDriverEspressifFFT, FFTDriverKissFFT, and FFTDriverRealFFT.

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

• src/AudioTools/AudioLibs/AudioFFT.h