SpectrumAnalyzer Class Reference

Spectrum Analyzer. More...

#include <spectrumanalyzer.h>

Inheritance diagram for SpectrumAnalyzer:

List of all members.

Public Member Functions
	SpectrumAnalyzer ()
	~SpectrumAnalyzer ()
card16	getSamplingRate () const
card8	getBits () const
card8	getChannels () const
card16	getByteOrder () const
cardinal	getBytesPerSecond () const
cardinal	getBitsPerSample () const
card16	setSamplingRate (const card16 samplingRate)
card8	setBits (const card8 bits)
card8	setChannels (const card8 channels)
card16	setByteOrder (const card16 byteOrder)
bool	ready () const
void	sync ()
bool	write (const void *data, const size_t length)
bool	getSpectrum (cardinal *left, cardinal *right, const cardinal bars)
Private Member Functions
void	doFourierTransformation (card16 *data, cardinal *output, cardinal bars)
Private Attributes
FastFourierTransformation *	FFT
cardinal	InputBufferPos
char	InputBuffer [4 *FFTPoints]
card16	AudioSamplingRate
card8	AudioBits
card8	AudioChannels
card16	AudioByteOrder
Static Private Attributes
static const cardinal	FFTPoints = 256

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Detailed Description

Spectrum Analyzer.

This class implements a spectrum analyzer device implementing AudioWriterInterface.

Author:

Thomas Dreibholz

Version:

1.0

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Constructor & Destructor Documentation

SpectrumAnalyzer::SpectrumAnalyzer

(

)

Constructor.

SpectrumAnalyzer::~SpectrumAnalyzer

(

)

Destructor.

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Member Function Documentation

void SpectrumAnalyzer::doFourierTransformation	(	card16 *	data,
		cardinal *	output,
		cardinal	bars
	)		[private]

card8 SpectrumAnalyzer::getBits

(

)

const [virtual]

getBits() Implementation of AudioQualityInterface.

See also:

AudioQualityInterface::getBits

Implements AudioQualityInterface.

cardinal SpectrumAnalyzer::getBitsPerSample

(

)

const [virtual]

getBitsPerSample() Implementation of AudioQualityInterface.

See also:

AudioQualityInterface::getBitsPerSample

Implements AudioQualityInterface.

card16 SpectrumAnalyzer::getByteOrder

(

)

const [virtual]

getByteOrder() Implementation of AudioQualityInterface.

See also:

AudioQualityInterface::getByteOrder

Implements AudioQualityInterface.

cardinal SpectrumAnalyzer::getBytesPerSecond

(

)

const [virtual]

getBytesPerSecond() Implementation of AudioQualityInterface.

See also:

AudioQualityInterface::getBytesPerSecond

Implements AudioQualityInterface.

card8 SpectrumAnalyzer::getChannels

(

)

const [virtual]

getChannels() Implementation of AudioQualityInterface.

See also:

AudioQualityInterface::getChannels

Implements AudioQualityInterface.

card16 SpectrumAnalyzer::getSamplingRate

(

)

const [virtual]

getSamplingRate() Implementation of AudioQualityInterface.

See also:

AudioQualityInterface::getSamplingRate

Implements AudioQualityInterface.

bool SpectrumAnalyzer::getSpectrum	(	cardinal *	left,
		cardinal *	right,
		const cardinal	bars
	)

Do Fourier transformation and get spectrum.

Parameters:

left	Pointer to spectrum array for left channel.
right	Pointer to spectrum array for right channel.
bars	Number of bars.

Returns:

true, if spectrum has been computed; false, if there is not enough input data available.

bool SpectrumAnalyzer::ready

(

)

const [virtual]

ready() implementation of AudioWriterInterface

See also:

AudioWriterInterface::ready

Implements AudioWriterInterface.

card8 SpectrumAnalyzer::setBits

(

const card8

bits

)

[virtual]

setBits() Implementation of AdjustableAudioQualityInterface.

See also:

AdjustableAudioQualityInterface::setBits

Implements AdjustableAudioQualityInterface.

card16 SpectrumAnalyzer::setByteOrder

(

const card16

byteOrder

)

[virtual]

setByteOrder() Implementation of AdjustableAudioQualityInterface.

See also:

AdjustableAudioQualityInterface::setByteOrder

Implements AdjustableAudioQualityInterface.

card8 SpectrumAnalyzer::setChannels

(

const card8

channels

)

[virtual]

setChannels() Implementation of AdjustableAudioQualityInterface.

See also:

AdjustableAudioQualityInterface::setChannels

Implements AdjustableAudioQualityInterface.

card16 SpectrumAnalyzer::setSamplingRate

(

const card16

samplingRate

)

[virtual]

setSamplingRate() Implementation of AdjustableAudioQualityInterface.

See also:

AdjustableAudioQualityInterface::setSamplingRate

Implements AdjustableAudioQualityInterface.

void SpectrumAnalyzer::sync

(

)

[virtual]

sync() implementation of AudioWriterInterface

See also:

AudioWriterInterface::sync

Implements AudioWriterInterface.

bool SpectrumAnalyzer::write	(	const void *	data,
		const size_t	length
	)		[virtual]

write() implementation of AudioWriterInterface

See also:

AudioWriterInterface::write

Implements AudioWriterInterface.

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Member Data Documentation

card8 SpectrumAnalyzer::AudioBits [private]

card16 SpectrumAnalyzer::AudioByteOrder [private]

card8 SpectrumAnalyzer::AudioChannels [private]

card16 SpectrumAnalyzer::AudioSamplingRate [private]

FastFourierTransformation* SpectrumAnalyzer::FFT [private]

const cardinal SpectrumAnalyzer::FFTPoints = 256 [static, private]

char SpectrumAnalyzer::InputBuffer[4 *FFTPoints] [private]

cardinal SpectrumAnalyzer::InputBufferPos [private]

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

• spectrumanalyzer.h
• spectrumanalyzer.cc