Class unaDspFFT

Unit

unaDsp

Declaration

type unaDspFFT = class(unaObject)

Description

FFT implementation.

Hierarchy

• TObject
• unaObject
• unaDspFFT

Overview

Methods

	constructor create(windowSize: unsigned = 1024);
	procedure AfterConstruction(); override;
	procedure BeforeDestruction(); override;
	procedure dft_complex_forward(samples: pointer; channel: unsigned = 0);
	procedure fft_complex_forward(samples: pointer; channel: unsigned = 0);
	procedure setFormat(sps, bits, channels: int); overload;
	procedure setFormat(format: punaPCMFormat); overload;
	procedure setWindowSize(size: unsigned);

Properties

	property data: pFloatArray read f_dataProxy;
	property dataC: pComplexFloatArray read f_dataC;
	property fftReady: bool read f_fftReady;
	property sampleRate: int read f_sps;
	property steps: unsigned read f_steps write setSteps;
	property windowSize: unsigned read f_windowSize write setWindowSize;

Description

Methods

	constructor create(windowSize: unsigned = 1024);

	procedure AfterConstruction(); override;

	procedure BeforeDestruction(); override;

	procedure dft_complex_forward(samples: pointer; channel: unsigned = 0);
complex DFT. Results are in dataR, dataI. /Works really slow/

	procedure fft_complex_forward(samples: pointer; channel: unsigned = 0);
complex FFT. Results are in dataR, dataI. /Works faster/

	procedure setFormat(sps, bits, channels: int); overload;

	procedure setFormat(format: punaPCMFormat); overload;

	procedure setWindowSize(size: unsigned);
size should be power of 2.

Properties

	property data: pFloatArray read f_dataProxy;

	property dataC: pComplexFloatArray read f_dataC;

	property fftReady: bool read f_fftReady;

	property sampleRate: int read f_sps;

	property steps: unsigned read f_steps write setSteps;

	property windowSize: unsigned read f_windowSize write setWindowSize;

(c) 2012 Lake of Soft