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Class unaFFTclass

Fields

Unit

Declaration

type unaFFTclass = class(unaObject)

Description

Simple FFT.

Hierarchy

TObject
unaObject
unaFFTclass

Overview

Methods

	`constructor create(T: int);`
	`destructor Destroy(); override;`
	`procedure fft(input: pFloatArray; output: pComplexFloatArray); overload;`
	`procedure fft(input: pComplexFloat; output: pComplexFloat); overload;`
	`procedure fft(input: pComplexFloatArray; output: pComplexFloatArray); overload;`
	`procedure fft(input: pFloat; output: pComplexFloat); overload;`
	`procedure fftInverse(input: pComplexFloatArray; output: pComplexFloatArray); overload;`
	`procedure fftInverse(input: pComplexFloat; output: pComplexFloat); overload;`
	`procedure setup(T: int);`
	`procedure fFFT_reduce(X: pComplexFloat; offs, count, maxDepth: int; depth: int = 0);`

Properties

	`property log2ws: int read f_log2ws write setLog2ws;`
	`property r[index:int]: int read getR;`
	`property windowSize: int read f_windowSize;`
	`property ws[index:int]: tComplexFloat read getWS;`

Description

Methods

constructor create(T: int);

Creates and FFT objec and prepares internal variables for FFT.

Parameters

T: windowsSize = 2**T

	`destructor Destroy(); override;`

	`procedure fft(input: pFloatArray; output: pComplexFloatArray); overload;`
FFT, real input (single)

	`procedure fft(input: pComplexFloat; output: pComplexFloat); overload;`
FFT, complex input (single)

	`procedure fft(input: pComplexFloatArray; output: pComplexFloatArray); overload;`
FFT, complex input (single)

	`procedure fft(input: pFloat; output: pComplexFloat); overload;`
FFT, real input (single)

	`procedure fftInverse(input: pComplexFloatArray; output: pComplexFloatArray); overload;`
Inverse FFT on complex values (single)

	`procedure fftInverse(input: pComplexFloat; output: pComplexFloat); overload;`
Inverse FFT on complex values (single)

procedure setup(T: int);

Prepares internal variables for FFT.

Parameters

T: windowsSize = 2**T

	`procedure fFFT_reduce(X: pComplexFloat; offs, count, maxDepth: int; depth: int = 0);`
//

Properties

	`property log2ws: int read f_log2ws write setLog2ws;`
log2(windowSize)

	`property r[index:int]: int read getR;`
this could be useful

	`property windowSize: int read f_windowSize;`
Size of windows (in samples).

	`property ws[index:int]: tComplexFloat read getWS;`

(c) 2012 Lake of Soft

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