This implements a window function as described @ https://ccrma.stanford.edu/~jos/sasp/Kaiser_Window.html
http://en.wikipedia.org/wiki/Window_function#Kaiser_windows. More...

#include <TTKaiserWindow.h>

Inheritance diagram for KaiserWindow:

Collaboration diagram for KaiserWindow:

Protected Member Functions
TTFloat64	BesselFunctionI0 (TTFloat64 x)
	internal use: calculate zeroth-order bessel function of the first kind

TTErr	setAlpha (const TTValue &newValue)
	Set the alpha attribute of the Kaiser window function. More...

TTErr	setBeta (const TTValue &newValue)
	Set the beta attribute of the Kaiser window function. More...

TTErr	calculateValue (const TTFloat64 &x, TTFloat64 &y, TTPtrSizedInt data)
	Calculate y = f(x) for a single value. More...

TTErr	processAudio (TTAudioSignalArrayPtr inputs, TTAudioSignalArrayPtr outputs)
	A standard audio processing method as used by TTBlue objects. More...

virtual TTErr	test (TTValue &returnedTestInfo)
	Unit test for the window function unit. More...

Protected Attributes
TTFloat64	mAlpha
	alpha and beta atributes are linked to allow congruence with both references above. More...

TTFloat64	mBeta
	attribute: beta parameter for the Kaiser function

TTFloat64	mBesselIOofBeta
	calculated from the beta attribute

Detailed Description

This implements a window function as described @ https://ccrma.stanford.edu/~jos/sasp/Kaiser_Window.html
http://en.wikipedia.org/wiki/Window_function#Kaiser_windows.

Definition at line 29 of file TTKaiserWindow.h.

Member Function Documentation

TTErr KaiserWindow::calculateValue	(	const TTFloat64 &	x,
		TTFloat64 &	y,
		TTPtrSizedInt	data
	)

inlineprotected

Calculate y = f(x) for a single value.

Parameters

x	The input value to the window function.
y	The resulting value for the window function.
data	Not used.

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

Definition at line 87 of file TTKaiserWindow.cpp.

References BesselFunctionI0(), kTTErrNone, mBesselIOofBeta, and mBeta.

Referenced by processAudio().

Here is the call graph for this function:

TTErr KaiserWindow::processAudio	(	TTAudioSignalArrayPtr	inputs,
		TTAudioSignalArrayPtr	outputs
	)

protected

A standard audio processing method as used by TTBlue objects.

Parameters

inputs	The input vector that is to be processed.
outputs	The resulting windowed vector.

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

Definition at line 102 of file TTKaiserWindow.cpp.

References calculateValue().

Here is the call graph for this function:

TTErr KaiserWindow::setAlpha ( const TTValue & newValue )

protected

Set the alpha attribute of the Kaiser window function.

Parameters

newValue The new value to apply.

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

Definition at line 63 of file TTKaiserWindow.cpp.

References BesselFunctionI0(), kTTErrNone, kTTPi, mAlpha, mBesselIOofBeta, and mBeta.

Here is the call graph for this function:

TTErr KaiserWindow::setBeta ( const TTValue & newValue )

protected

Set the beta attribute of the Kaiser window function.

Parameters

newValue The new value to apply.

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

Definition at line 75 of file TTKaiserWindow.cpp.

References BesselFunctionI0(), kTTErrNone, kTTPi, mAlpha, mBesselIOofBeta, and mBeta.

Here is the call graph for this function:

TTErr KaiserWindow::test ( TTValue & returnedTestInfo )

protectedvirtual

Unit test for the window function unit.

Parameters

returnedTestInfo The outcome from the performed unit test.

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

Reimplemented from TTAudioObjectBase.

Definition at line 52 of file TTKaiserWindow.test.cpp.

References TTAudioSignal::allocWithVectorSize(), kTTPi, mBesselIOofBeta, TTAudioSignal::mSampleVectors, TTAudioObjectBase::process(), TTValue::resize(), TTObjectBase::sendMessage(), TTObjectBase::setAttributeValue(), TT, TTObjectBaseInstantiate(), and TTObjectBaseRelease().

Here is the call graph for this function:

Member Data Documentation

TTFloat64 KaiserWindow::mAlpha

protected

alpha and beta atributes are linked to allow congruence with both references above.

setting one updates the other so that the following relationship is always true: beta = alpha * piattribute: alpha parameter for the Kaiser function

Definition at line 39 of file TTKaiserWindow.h.

Referenced by setAlpha(), and setBeta().

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

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

Member Data Documentation