Noise Generator. More...

#include <TTNoise.h>

Inheritance diagram for TTNoise:

Collaboration diagram for TTNoise:

Protected Member Functions
TTErr	processWhiteNoise (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	Audio processing method generating white noise. More...

TTErr	processGauss (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	Audio processing method using the mersenne twister algorithm for gaussian distribution noise. More...

TTErr	processPinkNoise (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	Audio processing method generating pink noise. More...

TTErr	processBrownNoise (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	Audio processing method generating brown noise. More...

TTErr	processBlueNoise (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	Audio processing method generating blue noise. More...

TTErr	setMode (const TTValue &newMode)
	Set the mode, that is: Set what kind of noise to generate. More...

TTErr	setGain (const TTValue &newValue)
	Set the overall gain of the generated noise signal. More...

TTErr	setNumChannels (const TTChannelCount newNumChannels)
	Set the number of channels to process. More...

TTErr	getGain (TTValue &returnedValue)
	Get the current value used for scaling overall gain level of the generated noise signal. More...

TTErr	Clear ()
	Clear past values used internally by various noise generator algorithms. More...

Protected Attributes
MTRand	mTwister
	Class implementing Mersenne Twister algorithm.

TTFloat64	mMean
	Mean value for gauss distribution process method.

TTFloat64	mStd
	Standard deviation value for gauss distribution process method.

TTSymbol	mMode
	Attribute: what color is the noise?

TTFloat64	mGain
	Gain stage.

TTChannelCount	mNumChannels
	Sets the number of noise channels.

TTUInt32	accum
	Accumulator for the noise generation.

TTSampleVector	mb0
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

TTSampleVector	mb1
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

TTSampleVector	mb2
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

TTSampleVector	mb3
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

TTSampleVector	mb4
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

TTSampleVector	mb5
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

TTSampleVector	mb6
	Internal coefficient used to keep track of past values. Used for some noise algorithms.

Detailed Description

Noise Generator.

Definition at line 32 of file TTNoise.h.

Member Function Documentation

TTErr TTNoise::Clear ( )

protected

Clear past values used internally by various noise generator algorithms.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 66 of file TTNoise.cpp.

References kTTErrNone, mb0, mb1, mb2, mb3, mb4, mb5, mb6, and mNumChannels.

Referenced by setNumChannels().

TTErr TTNoise::getGain ( TTValue & returnedValue )

protected

Get the current value used for scaling overall gain level of the generated noise signal.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 102 of file TTNoise.cpp.

References kTTErrNone, mGain, and TTLinearGainToDecibels().

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TTErr TTNoise::processBlueNoise	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

Audio processing method generating blue noise.

Parameters

inputs	The input signal to process.
outputs	The processed audio signal.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 217 of file TTNoise.cpp.

References accum, kTTErrNone, mb0, mGain, mNumChannels, TTAudioSignal::mSampleVectors, mTwister, and setNumChannels().

Referenced by setMode().

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TTErr TTNoise::processBrownNoise	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

Audio processing method generating brown noise.

Parameters

inputs	The input signal to process.
outputs	The processed audio signal.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 179 of file TTNoise.cpp.

References accum, kTTErrNone, mb0, mGain, mNumChannels, TTAudioSignal::mSampleVectors, mTwister, and setNumChannels().

Referenced by setMode().

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TTErr TTNoise::processGauss	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

Audio processing method using the mersenne twister algorithm for gaussian distribution noise.

Parameters

inputs	The input signal to process.
outputs	The processed audio signal.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Referenced by setMode().

TTErr TTNoise::processPinkNoise	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

Audio processing method generating pink noise.

Parameters

inputs	The input signal to process.
outputs	The processed audio signal.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 138 of file TTNoise.cpp.

References accum, kTTErrNone, mb0, mb1, mb2, mb3, mb4, mb5, mb6, mGain, mNumChannels, TTAudioSignal::mSampleVectors, mTwister, and setNumChannels().

Referenced by setMode().

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TTErr TTNoise::processWhiteNoise	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

Audio processing method generating white noise.

Parameters

inputs	The input signal to process.
outputs	The processed audio signal.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 109 of file TTNoise.cpp.

References accum, kTTErrNone, mGain, mNumChannels, TTAudioSignal::mSampleVectors, mTwister, and setNumChannels().

Referenced by setMode().

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TTErr TTNoise::setGain ( const TTValue & newValue )

protected

Set the overall gain of the generated noise signal.

@param newValue The new value that we want to apply for gain scaling.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 95 of file TTNoise.cpp.

References kTTErrNone, mGain, and TTDecibelsToLinearGain().

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TTErr TTNoise::setMode ( const TTValue & newMode )

protected

Set the mode, that is: Set what kind of noise to generate.

Parameters

newMode The noise mode that we want to use.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 79 of file TTNoise.cpp.

References mMode, processBlueNoise(), processBrownNoise(), processGauss(), processPinkNoise(), processWhiteNoise(), setProcessMethod, and TT.

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TTErr TTNoise::setNumChannels ( const TTChannelCount newNumChannels )

protected

Set the number of channels to process.

Parameters

newNumChannels The number of channels to process.

Returns: TTErr error code if the method fails to execute, else kTTErrNone.

Definition at line 51 of file TTNoise.cpp.

References Clear(), kTTErrNone, mb0, mb1, mb2, mb3, mb4, mb5, mb6, and mNumChannels.

Referenced by processBlueNoise(), processBrownNoise(), processPinkNoise(), and processWhiteNoise().

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

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation