USpectrogram Class Reference

#include <USpectrogram.h>

List of all members.

Public Slots
void	clear ()
void	push (const std::vector< float > &frame)
void	push (const QVector< float > &frame)
void	setSamplingRate (int fs)
Public Member Functions
	USpectrogram (QWidget *parent=0)
	USpectrogram (int fs, QWidget *parent=0)
void	setData (const QList< QVector< float > > &data)

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Detailed Description

USpectrogram is a QWidget to show a spectrogram. Add frames (squared magnitude values) incrementally using Qt signals/slots.

Chirp

Example:

 #include "utilite/USpectrogram.h"
 #include <QApplication>

 int main(int argc, char * argv[])
 {
  QApplication app(argc, argv);
        USpectrogram spectrogram;

        // Get audio frames and compute the FFTs,
        // compute the squared magnitude (im*im + re*re) of the FFTs, then
        // add the frequency frames to the spectrogram.
        std::vector<float> frame1, frame2, frame3, frame4; //...
        spectrogram.push(frame1);
        spectrogram.push(frame2);
        spectrogram.push(frame3);
        spectrogram.push(frame4);
        spectrogram.push(frameXXXX);
        //...

        spectrogram.show();
        app.exec();
        return 0;
 }

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Constructor & Destructor Documentation

USpectrogram::USpectrogram

(

QWidget *

parent = 0

)

Constructor 1.

USpectrogram::USpectrogram	(	int	fs,
		QWidget *	parent = 0
	)

Constructor 2. Set the sampling frequency of the frames (used to show values in Hz).

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Member Function Documentation

void USpectrogram::clear

(

)

[slot]

Clear the spectrogram.

void USpectrogram::push

(

const std::vector< float > &

frame

)

[slot]

Push a new frame. It must be the same size of the previous added frames. If not, a clear() is required.

void USpectrogram::push

(

const QVector< float > &

frame

)

[slot]

For convenience, push a new frame. It must be the same size of the previous added frames. If not, a clear() is required.

void USpectrogram::setData

(

const QList< QVector< float > > &

data

)

Set all frames. If you want to incrementally add frames, use slot push().

void USpectrogram::setSamplingRate

(

int

fs

)

[slot]

Set sampling rate (to display frequencies in Hz).

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

• qt/include/utilite/USpectrogram.h