juce::AudioParameterFloat Class Reference

#include <juce_AudioParameterFloat.h>

Inheritance diagram for juce::AudioParameterFloat:

Public Member Functions
	AudioParameterFloat (const ParameterID &parameterID, const String &parameterName, NormalisableRange< float > normalisableRange, float defaultValue, const AudioParameterFloatAttributes &attributes={})
	AudioParameterFloat (const ParameterID &parameterID, const String &parameterName, NormalisableRange< float > normalisableRange, float defaultValue, const String &parameterLabel, Category parameterCategory=AudioProcessorParameter::genericParameter, std::function< String(float value, int maximumStringLength)> stringFromValue=nullptr, std::function< float(const String &text)> valueFromString=nullptr)
	AudioParameterFloat (const ParameterID &parameterID, const String &parameterName, float minValue, float maxValue, float defaultValue)
	~AudioParameterFloat () override
float	get () const noexcept
	operator float () const noexcept
AudioParameterFloat &	operator= (float newValue)
const NormalisableRange< float > &	getNormalisableRange () const override
Public Member Functions inherited from juce::RangedAudioParameter
int	getNumSteps () const override
float	convertTo0to1 (float v) const noexcept
float	convertFrom0to1 (float v) const noexcept
	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const AudioProcessorParameterWithIDAttributes &attributes={})
	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const String &parameterLabel, Category parameterCategory=AudioProcessorParameter::genericParameter)
Public Member Functions inherited from juce::AudioProcessorParameterWithID
	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const AudioProcessorParameterWithIDAttributes &attributes={})
	AudioProcessorParameterWithID (const ParameterID &parameterID, const String &parameterName, const String &parameterLabel, Category parameterCategory=AudioProcessorParameter::genericParameter)
String	getName (int) const override
String	getLabel () const override
Category	getCategory () const override
String	getParameterID () const override
bool	isMetaParameter () const override
bool	isAutomatable () const override
bool	isOrientationInverted () const override
Public Member Functions inherited from juce::HostedAudioProcessorParameter
	AudioProcessorParameter () noexcept=default
	AudioProcessorParameter (int versionHint)
Public Member Functions inherited from juce::AudioProcessorParameter
	AudioProcessorParameter () noexcept=default
	AudioProcessorParameter (int versionHint)
virtual	~AudioProcessorParameter ()
void	setValueNotifyingHost (float newValue)
void	beginChangeGesture ()
void	endChangeGesture ()
virtual bool	isDiscrete () const
virtual bool	isBoolean () const
int	getParameterIndex () const noexcept
virtual String	getCurrentValueAsText () const
virtual StringArray	getAllValueStrings () const
int	getVersionHint () const
void	addListener (Listener *newListener)
void	removeListener (Listener *listener)
void	sendValueChangedMessageToListeners (float newValue)

Public Attributes
NormalisableRange< float >	range
Public Attributes inherited from juce::AudioProcessorParameterWithID
const String	paramID
const String	name
const String	label
const Category	category

Protected Member Functions
virtual void	valueChanged (float newValue)

Private Member Functions
float	getValue () const override
void	setValue (float newValue) override
float	getDefaultValue () const override
int	getNumSteps () const override
String	getText (float, int) const override
float	getValueForText (const String &) const override

Private Attributes
std::atomic< float >	value
const float	valueDefault
std::function< String(float, int)>	stringFromValueFunction
std::function< float(const String &)>	valueFromStringFunction

Additional Inherited Members
Public Types inherited from juce::AudioProcessorParameter
enum	Category {   genericParameter = (0 << 16) | 0 , inputGain = (1 << 16) | 0 , outputGain = (1 << 16) | 1 , inputMeter = (2 << 16) | 0 ,   outputMeter = (2 << 16) | 1 , compressorLimiterGainReductionMeter = (2 << 16) | 2 , expanderGateGainReductionMeter = (2 << 16) | 3 , analysisMeter = (2 << 16) | 4 ,   otherMeter = (2 << 16) | 5 }

Detailed Description

A subclass of AudioProcessorParameter that provides an easy way to create a parameter which maps onto a given NormalisableRange.

See also

AudioParameterInt, AudioParameterBool, AudioParameterChoice

@tags{Audio}

Constructor & Destructor Documentation

AudioParameterFloat() [1/3]

juce::AudioParameterFloat::AudioParameterFloat	(	const ParameterID &	parameterID,
		const String &	parameterName,
		NormalisableRange< float >	normalisableRange,
		float	defaultValue,
		const AudioParameterFloatAttributes &	attributes = {} )

Creates a AudioParameterFloat with the specified parameters.

Note that the attributes argument is optional and only needs to be supplied if you want to change options from their default values.

Example usage:

auto attributes = AudioParameterFloatAttributes().withStringFromValueFunction ([] (auto x, auto) { return String (x * 100); })
                                                 .withLabel ("%");
auto param = std::make_unique<AudioParameterFloat> ("paramID", "Parameter Name", NormalisableRange<float>(), 0.5f, attributes);

Parameters

parameterID	The parameter ID to use
parameterName	The parameter name to use
normalisableRange	The NormalisableRange to use
defaultValue	The non-normalised default value
Attributes	Optional characteristics

AudioParameterFloat() [2/3]

juce::AudioParameterFloat::AudioParameterFloat ( const ParameterID & parameterID, const String & parameterName, NormalisableRange< float > normalisableRange, float defaultValue, const String & parameterLabel, Category parameterCategory = AudioProcessorParameter::genericParameter, std::function< String(float value, int maximumStringLength)> stringFromValue = nullptr, std::function< float(const String &text)> valueFromString = nullptr )

inline

Creates a AudioParameterFloat with the specified parameters.

Parameters

parameterID	The parameter ID to use
parameterName	The parameter name to use
normalisableRange	The NormalisableRange to use
defaultValue	The non-normalised default value
parameterLabel	An optional label for the parameter's value
parameterCategory	An optional parameter category
stringFromValue	An optional lambda function that converts a non-normalised value to a string with a maximum length. This may be used by hosts to display the parameter's value.
valueFromString	An optional lambda function that parses a string and converts it into a non-normalised value. Some hosts use this to allow users to type in parameter values.

AudioParameterFloat() [3/3]

juce::AudioParameterFloat::AudioParameterFloat	(	const ParameterID &	parameterID,
		const String &	parameterName,
		float	minValue,
		float	maxValue,
		float	defaultValue )

Creates a AudioParameterFloat with an ID, name, and range. On creation, its value is set to the default value. For control over skew factors, you can use the other constructor and provide a NormalisableRange.

~AudioParameterFloat()

juce::AudioParameterFloat::~AudioParameterFloat ( )

override

Destructor.

Member Function Documentation

get()

float juce::AudioParameterFloat::get ( ) const

inlinenoexcept

Returns the parameter's current value.

getDefaultValue()

float juce::AudioParameterFloat::getDefaultValue ( ) const

overrideprivatevirtual

This should return the default value for this parameter.

Implements juce::AudioProcessorParameter.

Reimplemented in juce::AudioProcessorValueTreeState::Parameter.

getNormalisableRange()

const NormalisableRange< float > & juce::AudioParameterFloat::getNormalisableRange ( ) const

inlineoverridevirtual

Returns the range of values that the parameter can take.

Implements juce::RangedAudioParameter.

getNumSteps()

int juce::AudioParameterFloat::getNumSteps ( ) const

overrideprivatevirtual

Returns the number of steps that this parameter's range should be quantised into.

If you want a continuous range of values, don't override this method, and allow the default implementation to return AudioProcessor::getDefaultNumParameterSteps().

If your parameter is boolean, then you may want to make this return 2.

The value that is returned may or may not be used, depending on the host. If you want the host to display stepped automation values, rather than a continuous interpolation between successive values, you should override isDiscrete to return true.

See also

isDiscrete

Reimplemented from juce::AudioProcessorParameter.

Reimplemented in juce::AudioProcessorValueTreeState::Parameter.

getText()

String juce::AudioParameterFloat::getText ( float normalisedValue, int  ) const

overrideprivatevirtual

Returns a textual version of the supplied normalised parameter value. The default implementation just returns the floating point value as a string, but this could do anything you need for a custom type of value.

Reimplemented from juce::AudioProcessorParameter.

getValue()

float juce::AudioParameterFloat::getValue ( ) const

overrideprivatevirtual

Called by the host to find out the value of this parameter.

Hosts will expect the value returned to be between 0 and 1.0.

This could be called quite frequently, so try to make your code efficient. It's also likely to be called by non-UI threads, so the code in here should be thread-aware.

Implements juce::AudioProcessorParameter.

getValueForText()

float juce::AudioParameterFloat::getValueForText ( const String & text ) const

overrideprivatevirtual

Should parse a string and return the appropriate value for it.

Implements juce::AudioProcessorParameter.

operator float()

juce::AudioParameterFloat::operator float ( ) const

inlinenoexcept

Returns the parameter's current value.

operator=()

AudioParameterFloat & juce::AudioParameterFloat::operator=

(

float

newValue

)

Changes the parameter's current value.

setValue()

void juce::AudioParameterFloat::setValue ( float newValue )

overrideprivatevirtual

The host will call this method to change the value of a parameter.

The host may call this at any time, including during the audio processing callback, so your implementation has to process this very efficiently and avoid any kind of locking.

If you want to set the value of a parameter internally, e.g. from your editor component, then don't call this directly - instead, use the setValueNotifyingHost() method, which will also send a message to the host telling it about the change. If the message isn't sent, the host won't be able to automate your parameters properly.

The value passed will be between 0 and 1.0.

Implements juce::AudioProcessorParameter.

valueChanged()

void juce::AudioParameterFloat::valueChanged ( float newValue )

protectedvirtual

Override this method if you are interested in receiving callbacks when the parameter value changes.

Reimplemented in juce::AudioProcessorValueTreeState::Parameter.

Member Data Documentation

range

NormalisableRange<float> juce::AudioParameterFloat::range

Provides access to the parameter's range.

stringFromValueFunction

std::function<String (float, int)> juce::AudioParameterFloat::stringFromValueFunction

private

value

std::atomic<float> juce::AudioParameterFloat::value

private

valueDefault

const float juce::AudioParameterFloat::valueDefault

private

valueFromStringFunction

std::function<float (const String&)> juce::AudioParameterFloat::valueFromStringFunction

private

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

• /home/runner/work/lmms-fork/lmms-fork/plugins/CarlaBase/carla/source/modules/juce_audio_processors/utilities/juce_AudioParameterFloat.h
• /home/runner/work/lmms-fork/lmms-fork/plugins/CarlaBase/carla/source/modules/juce_audio_processors/utilities/juce_AudioParameterFloat.cpp