StateVariableFilter::Parameters< NumericType > Struct Template Reference

#include <juce_StateVariableFilter.h>

Inheritance diagram for StateVariableFilter::Parameters< NumericType >:

Collaboration diagram for StateVariableFilter::Parameters< NumericType >:

Public Types
using	Ptr = ReferenceCountedObjectPtr< Parameters >
	The Coefficients structure is ref-counted, so this is a handy type that can be used as a pointer to one. More...
enum	Type {   Type::lowPass,   Type::bandPass,   Type::highPass }

Public Member Functions
	Parameters ()=default
	Parameters (const Parameters &o)
void	decReferenceCount () noexcept
	Decreases the object's reference count. More...
bool	decReferenceCountWithoutDeleting () noexcept
	Decreases the object's reference count. More...
int	getReferenceCount () const noexcept
	Returns the object's current reference count. More...
void	incReferenceCount () noexcept
	Increments the object's reference count. More...
Parameters &	operator= (const Parameters &o) noexcept
void	setCutOffFrequency (double sampleRate, NumericType frequency, NumericType resonance=static_cast< NumericType >(1.0/std::sqrt(2.0))) noexcept
	Sets the cutoff frequency and resonance of the IIR filter. More...

Public Attributes
NumericType	g = static_cast<NumericType> (std::tan (double_Pi * 200.0 / 44100.0))
NumericType	h = static_cast<NumericType> (1.0 / (1.0 + R2 * g + g * g))
NumericType	R2 = static_cast<NumericType> (std::sqrt (2.0))
Type	type = Type::lowPass
	The type of the IIR filter. More...

Protected Member Functions
void	resetReferenceCount () noexcept
	Resets the reference count to zero without deleting the object. More...

Member Typedef Documentation

Ptr

template<typename NumericType>

using StateVariableFilter::Parameters< NumericType >::Ptr = ReferenceCountedObjectPtr<Parameters>

The Coefficients structure is ref-counted, so this is a handy type that can be used as a pointer to one.

Member Enumeration Documentation

Type

template<typename NumericType>

enum StateVariableFilter::Parameters::Type

strong

Enumerator
lowPass
bandPass
highPass

Constructor & Destructor Documentation

Parameters() [1/2]

template<typename NumericType>

StateVariableFilter::Parameters< NumericType >::Parameters ( )

default

Parameters() [2/2]

template<typename NumericType>

StateVariableFilter::Parameters< NumericType >::Parameters ( const Parameters< NumericType > &  o )

inline

Member Function Documentation

decReferenceCount()

void ReferenceCountedObject::decReferenceCount ( )

inlinenoexceptinherited

Decreases the object's reference count.

If the count gets to zero, the object will be deleted.

References jassert.

decReferenceCountWithoutDeleting()

bool ReferenceCountedObject::decReferenceCountWithoutDeleting ( )

inlinenoexceptinherited

Decreases the object's reference count.

If the count gets to zero, the object will not be deleted, but this method will return true, allowing the caller to take care of deletion.

References jassert.

getReferenceCount()

int ReferenceCountedObject::getReferenceCount ( ) const

inlinenoexceptinherited

Returns the object's current reference count.

incReferenceCount()

void ReferenceCountedObject::incReferenceCount ( )

inlinenoexceptinherited

Increments the object's reference count.

This is done automatically by the smart pointer, but is public just in case it's needed for nefarious purposes.

operator=()

template<typename NumericType>

Parameters& StateVariableFilter::Parameters< NumericType >::operator= ( const Parameters< NumericType > &  o )

inlinenoexcept

References StateVariableFilter::Parameters< NumericType >::g.

resetReferenceCount()

void ReferenceCountedObject::resetReferenceCount ( )

inlineprotectednoexceptinherited

Resets the reference count to zero without deleting the object.

You should probably never need to use this!

setCutOffFrequency()

template<typename NumericType>

void StateVariableFilter::Parameters< NumericType >::setCutOffFrequency ( double  sampleRate, NumericType  frequency, NumericType  resonance = static_cast<NumericType> (1.0 / std::sqrt (2.0))  )

inlinenoexcept

Sets the cutoff frequency and resonance of the IIR filter.

Note : the bandwidth of the resonance increases with the value of the parameter. To have a standard 12 dB/octave filter, the value must be set at 1 / sqrt(2).

References double_Pi.

Member Data Documentation

g

template<typename NumericType>

NumericType StateVariableFilter::Parameters< NumericType >::g = static_cast<NumericType> (std::tan (double_Pi * 200.0 / 44100.0))

Referenced by StateVariableFilter::Parameters< NumericType >::operator=().

h

template<typename NumericType>

NumericType StateVariableFilter::Parameters< NumericType >::h = static_cast<NumericType> (1.0 / (1.0 + R2 * g + g * g))

R2

template<typename NumericType>

NumericType StateVariableFilter::Parameters< NumericType >::R2 = static_cast<NumericType> (std::sqrt (2.0))

type

template<typename NumericType>

Type StateVariableFilter::Parameters< NumericType >::type = Type::lowPass

The type of the IIR filter.

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

• juce_StateVariableFilter.h