TracktionEngine: tracktion::graph::NodePlayer Class Reference

TracktionEngine

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Simple player for an Node. More...

#include <tracktion_NodePlayer.h>

Public Member Functions
	NodePlayer ()=default
	Creates an empty NodePlayer.

	NodePlayer (std::unique_ptr< Node > nodeToProcess, PlayHeadState *playHeadStateToUse=nullptr)
	Creates an NodePlayer to process a Node.

Node *	getNode ()
	Returns the current Node.

void	setNode (std::unique_ptr< Node > newNode)
	Sets the Node to process.

void	setNode (std::unique_ptr< Node > newNode, double sampleRateToUse, int blockSizeToUse)
	Sets the Node to process with a new sample rate and block size.

void	prepareToPlay (double sampleRateToUse, int blockSizeToUse)
	Prepares the current Node to be played.

std::unique_ptr< NodeGraph >	prepareToPlay (std::unique_ptr< Node > node, NodeGraph *oldGraph, double sampleRateToUse, int blockSizeToUse)
	Prepares a specific Node to be played and returns all the Nodes.

int	process (const Node::ProcessContext &pc)
	Processes a block of audio and MIDI data.

double	getSampleRate () const

int	processPostorderedNodes (NodeGraph &graphToProcess, const Node::ProcessContext &pc)

Protected Member Functions
int	processWithPlayHeadState (PlayHeadState &phs, NodeGraph &graphToProcess, const Node::ProcessContext &pc)

Static Protected Member Functions
static int	processPostorderedNodesSingleThreaded (NodeGraph &nodeGraph, const Node::ProcessContext &pc)
	Processes a group of Nodes assuming a postordering VertexOrdering.

Protected Attributes
std::unique_ptr< Node >	input

std::unique_ptr< NodeGraph >	nodeGraph

PlayHeadState *	playHeadState = nullptr

double	sampleRate = 0.0

int	blockSize = 0

juce::SpinLock	inputAndNodesLock

Detailed Description

Simple player for an Node.

This simply iterate all the nodes attempting to process them in a single thread.

Constructor & Destructor Documentation

◆ NodePlayer() [1/2]

tracktion::graph::NodePlayer::NodePlayer ( )

default

Creates an empty NodePlayer.

◆ NodePlayer() [2/2]

tracktion::graph::NodePlayer::NodePlayer	(	std::unique_ptr< Node >	nodeToProcess,
		PlayHeadState *	playHeadStateToUse = `nullptr`
	)

Creates an NodePlayer to process a Node.

Member Function Documentation

◆ getNode()

Node * tracktion::graph::NodePlayer::getNode ( )

Returns the current Node.

References input, and nodeGraph.

◆ setNode() [1/2]

void tracktion::graph::NodePlayer::setNode ( std::unique_ptr< Node > newNode )

Sets the Node to process.

References blockSize, sampleRate, and setNode().

Referenced by setNode().

◆ setNode() [2/2]

void tracktion::graph::NodePlayer::setNode	(	std::unique_ptr< Node >	newNode,
		double	sampleRateToUse,
		int	blockSizeToUse
	)

Sets the Node to process with a new sample rate and block size.

References inputAndNodesLock, nodeGraph, and prepareToPlay().

◆ prepareToPlay() [1/2]

void tracktion::graph::NodePlayer::prepareToPlay	(	double	sampleRateToUse,
		int	blockSizeToUse
	)

Prepares the current Node to be played.

References blockSize, input, nodeGraph, prepareToPlay(), and sampleRate.

Referenced by prepareToPlay(), and setNode().

◆ prepareToPlay() [2/2]

std::unique_ptr< NodeGraph > tracktion::graph::NodePlayer::prepareToPlay	(	std::unique_ptr< Node >	node,
		NodeGraph *	oldGraph,
		double	sampleRateToUse,
		int	blockSizeToUse
	)

Prepares a specific Node to be played and returns all the Nodes.

References blockSize, tracktion::graph::PlayHeadState::playHead, playHeadState, sampleRate, tracktion::graph::PlayHead::setScrubbingBlockLength(), and tracktion::graph::timeToSample().

◆ process()

int tracktion::graph::NodePlayer::process ( const Node::ProcessContext & pc )

Processes a block of audio and MIDI data.

Returns the number of times a node was checked but unable to be processed.

References inputAndNodesLock, nodeGraph, playHeadState, processPostorderedNodes(), and processWithPlayHeadState().

◆ getSampleRate()

double tracktion::graph::NodePlayer::getSampleRate ( ) const

References sampleRate.

◆ processPostorderedNodes()

int tracktion::graph::NodePlayer::processPostorderedNodes	(	NodeGraph &	graphToProcess,
		const Node::ProcessContext &	pc
	)

References processPostorderedNodesSingleThreaded().

Referenced by process(), and processWithPlayHeadState().

◆ processWithPlayHeadState()

int tracktion::graph::NodePlayer::processWithPlayHeadState	(	PlayHeadState &	phs,
		NodeGraph &	graphToProcess,
		const Node::ProcessContext &	pc
	)

protected

References tracktion::graph::Node::AudioAndMidiBuffer::audio, tracktion::graph::Node::ProcessContext::buffers, tracktion::graph::Node::AudioAndMidiBuffer::midi, tracktion::graph::Node::ProcessContext::numSamples, tracktion::graph::PlayHeadState::playHead, processPostorderedNodes(), tracktion::graph::Node::ProcessContext::referenceSampleRange, and tracktion::graph::PlayHeadState::update().

Referenced by process().

◆ processPostorderedNodesSingleThreaded()

static int tracktion::graph::NodePlayer::processPostorderedNodesSingleThreaded	(	NodeGraph &	nodeGraph,
		const Node::ProcessContext &	pc
	)

staticprotected

Processes a group of Nodes assuming a postordering VertexOrdering.

If these conditions are met the Nodes should be processed in a single loop iteration.

References tracktion::graph::Node::AudioAndMidiBuffer::audio, tracktion::graph::Node::ProcessContext::buffers, tracktion::graph::Node::AudioAndMidiBuffer::midi, nodeGraph, tracktion::graph::Node::ProcessContext::numSamples, and tracktion::graph::Node::ProcessContext::referenceSampleRange.

Referenced by processPostorderedNodes().

Member Data Documentation

◆ input

std::unique_ptr<Node> tracktion::graph::NodePlayer::input

protected

Referenced by getNode(), and prepareToPlay().

◆ nodeGraph

std::unique_ptr<NodeGraph> tracktion::graph::NodePlayer::nodeGraph

protected

Referenced by getNode(), prepareToPlay(), process(), processPostorderedNodesSingleThreaded(), and setNode().

◆ playHeadState

PlayHeadState* tracktion::graph::NodePlayer::playHeadState = nullptr

protected

Referenced by prepareToPlay(), and process().

◆ sampleRate

double tracktion::graph::NodePlayer::sampleRate = 0.0

protected

Referenced by getSampleRate(), prepareToPlay(), prepareToPlay(), and setNode().

◆ blockSize

int tracktion::graph::NodePlayer::blockSize = 0

protected

Referenced by prepareToPlay(), prepareToPlay(), and setNode().

◆ inputAndNodesLock

juce::SpinLock tracktion::graph::NodePlayer::inputAndNodesLock

protected

Referenced by process(), and setNode().

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

tracktion_NodePlayer.h