#include <audio/node/levelmeternode.h>

Public Types
enum	EType { PEAK, RMS }

Public Member Functions
	LevelMeterNode (NodeManager &nodeManager, TimeValue analysisWindowSize=10, bool rootProcess=true)

virtual	~LevelMeterNode ()

float	getLevel ()

void	setType (EType type)

void	process () override

void	sampleRateChanged (float sampleRate) override

Public Member Functions inherited from Node
	Node (NodeManager &manager)

const std::set< OutputPin * > &	getOutputs () const

const std::set< InputPinBase * > &	getInputs () const

Public Member Functions inherited from Process
	Process (NodeManager &nodeManager)

	Process (ParentProcess &parent)

	Process (const Process &)=delete

Process &	operator= (const Process &)=delete

virtual	~Process ()

void	update ()

NodeManager &	getNodeManager () const

int	getBufferSize () const

float	getSampleRate () const

DiscreteTimeValue	getSampleTime () const

Public Attributes
InputPin	input = {this}

Additional Inherited Members
Protected Member Functions inherited from Node
SampleBuffer &	getOutputBuffer (OutputPin &output)

Protected Member Functions inherited from Process
virtual void	bufferSizeChanged (int bufferSize)

bool	isRegisteredWithNodeManager () const

Description

Node to measure the amplitude level of an audio signal. Can be used for VU meters or envelope followers for example. Can switch between measuring peaks of the signal or the root mean square.

Inheritance diagram for LevelMeterNode:

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Collaboration diagram for LevelMeterNode:

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Member Enumeration Documentation

◆ EType

enum EType

strong

Enumerator
PEAK
RMS

Constructor & Destructor Documentation

◆ LevelMeterNode()

LevelMeterNode	(	NodeManager &	nodeManager,
		TimeValue	analysisWindowSize = `10`,
		bool	rootProcess = `true`
	)

Parameters

nodeManager	the node manager
analysisWindowSize	the time window in milliseconds that will be used to generate one single output value. Also the period that corresponds to the analysis frequency.
rootProcess	indicates that the node is registered as root process with the AudioNodeManager and is processed automatically.

◆ ~LevelMeterNode()

virtual ~LevelMeterNode ( )

virtual

Member Function Documentation

◆ getLevel()

float getLevel ( )

Returns: : The current level of the analyzed signal.

◆ process()

void process ( )

overridevirtual

Has to be overwritted by descendants to specify the actual process.

Reimplemented from Node.

◆ sampleRateChanged()

void sampleRateChanged ( float sampleRate )

overridevirtual

Called whenever the sample rate that the node system runs on changes. Can be overwritten to respond to changes

Parameters

sampleRate then new sample rate

Reimplemented from Process.

◆ setType()

void setType ( EType type )

Set the Type of the analysis. PEAK means the highest absolute amplitude within the analyzed window will be output. RMS means the root mean square of all values within the analyzed window will be output.

Member Data Documentation

◆ input

InputPin input = {this}

The input for the audio signal that will be analyzed.

Public Types

Public Member Functions

Public Attributes

Additional Inherited Members