engine::ChannelMapperPlugin Class Reference

A plugin that applies an explicit channel mapping. More...

#include <tracktion_ChannelMapperPlugin.h>

Inheritance diagram for engine::ChannelMapperPlugin:

Public Member Functions
	ChannelMapperPlugin (PluginCreationInfo)
	~ChannelMapperPlugin () override
juce::String	getName () const override
	The name of the type, e.g.
juce::String	getPluginType () override
	Returns a string identifying the plugin type (used as the XML tag name).
juce::String	getShortName (int) override
	Returns an abbreviated name, ideally fitting within suggestedLength characters.
juce::String	getSelectableDescription () override
	Subclasses must return a description of what they are.
bool	takesMidiInput () override
bool	canBeAddedToClip () override
bool	producesAudioWhenNoAudioInput () override
	Returns true if the plugin can produce audio when its input is silent (e.g.
BusLayout	getBusses () const override
	Returns the full input/output bus layout of this plugin.
int	getNumOutputChannelsGivenInputs (int numInputChannels) override
	Returns the number of output channels this plugin will produce for track routing.
void	initialise (const PluginInitialisationInfo &) override
	Gives the plugin a chance to set itself up before being played.
void	deinitialise () override
	Called after play stops to release resources.
void	applyToBuffer (const PluginRenderContext &) override
	Process the next block of data.
void	restorePluginStateFromValueTree (const juce::ValueTree &) override
ChannelMap	getChannelMap () const
	Returns the current channel map.
void	setChannelMap (const ChannelMap &)
	Sets a new channel map and stores it in the plugin state.
int	getNumInputChannels () const
	Returns the number of input channels configured.
int	getNumOutputChannels () const
	Returns the number of output channels configured.
void	setNumInputChannels (int)
	Sets the number of input channels.
void	setNumOutputChannels (int)
	Sets the number of output channels.
Public Member Functions inherited from engine::Plugin
	Plugin (PluginCreationInfo)
	~Plugin () override
void	selectableAboutToBeDeleted () override
	Called just before the selectable is about to be deleted so any subclasses should still be valid at this point.
void	playStartedOrStopped ()
	called by the system to let the plugin manage its automation stuff
virtual void	initialiseFully ()
	Gives the plugin a chance to do extra initialisation when it's been added to an edit.
virtual void	flushPluginStateToValueTree () override
virtual juce::String	getVendor ()
	Returns the plugin vendor/manufacturer name.
juce::String	getDisplayName () const
	Returns the custom name if set, otherwise the built-in getName().
juce::String	getCustomName () const
	Returns the raw custom name (may be empty).
void	setCustomName (const juce::String &)
	Sets a custom display name.
virtual juce::String	getIdentifierString ()
	A unique string to identify a plugin independent of install location.
virtual juce::String	getTooltip ()
	Returns a tooltip string for UI display.
virtual void	setEnabled (bool)
	Enable/disable the plugin.
bool	isEnabled () const noexcept
void	setFrozen (bool shouldBeFrozen)
	Freezing is stronger than disabling – a frozen plugin cannot be interacted with at all.
bool	isFrozen () const noexcept
void	setProcessingEnabled (bool p)
	Enable/disable processing.
bool	isProcessingEnabled () const noexcept
virtual void	initialiseWithoutStopping (const PluginInitialisationInfo &)
	Tells the plugin that the audio graph has changed but the plugin isn't being re-initialised - i.e.
virtual void	reset ()
	Should reset synth voices, tails, clear delay buffers, etc.
virtual void	trackPropertiesChanged ()
	Track name or colour has changed.
virtual void	midiPanic ()
	Tells the plugin to turn off any playing notes, if applicable.
virtual void	prepareForNextBlock (TimePosition)
	Called between successive rendering blocks.
void	applyToBufferWithAutomation (const PluginRenderContext &)
virtual bool	shouldMeasureCpuUsage () const noexcept
	Plugins can return false if they want to avoid the overhead of measuring the CPU usage.
double	getCpuUsage () const noexcept
	Returns the proportion of the current buffer size spent processing this plugin.
virtual bool	noTail ()
	Returns true if the plugin has no tail (i.e.
virtual void	getChannelNames (juce::StringArray *ins, juce::StringArray *outs)
	Fills the provided StringArrays with the names of this plugin's input and/or output channels.
virtual bool	takesAudioInput ()
	Returns true if this plugin should be fed audio from upstream in the chain.
virtual bool	isSynth ()
virtual double	getLatencySeconds ()
	Returns the plugin's processing latency in seconds.
virtual double	getTailLength () const
	Returns the length of the plugin's tail in seconds (e.g.
virtual bool	canSidechain ()
	Returns true if this plugin supports sidechain input.
AutomatableParameter *	addParam (const juce::String &paramID, const juce::String &name, juce::NormalisableRange< float > valueRange)
	Registers a new automatable parameter owned by this plugin.
AutomatableParameter *	addParam (const juce::String &paramID, const juce::String &name, juce::NormalisableRange< float > valueRange, std::function< juce::String(float)> valueToStringFunction, std::function< float(const juce::String &)> stringToValueFunction)
	Registers a new automatable parameter with custom string conversion functions.
juce::StringArray	getInputChannelNames ()
	Returns the names of this plugin's input channels (convenience wrapper around getChannelNames).
juce::StringArray	getSidechainSourceNames (bool allowNone)
	Returns the names of available sidechain sources for this plugin.
void	setSidechainSourceByName (const juce::String &name)
	Sets the sidechain source by its display name.
juce::String	getSidechainSourceName ()
	Returns the display name of the current sidechain source.
void	guessSidechainRouting ()
	Attempts to automatically determine a sensible sidechain routing.
int	getNumWires () const
Wire *	getWire (int index) const
void	makeConnection (int srcChannel, int dstChannel, juce::UndoManager *)
void	breakConnection (int srcChannel, int dstChannel)
virtual bool	hasNameForMidiNoteNumber (int note, int midiChannel, juce::String &name)
	If it's a synth that names its notes, this can return the name it uses for this note 0-127.
virtual bool	hasNameForMidiProgram (int programNum, int bank, juce::String &name)
	Returns the name for a midi program, if there is one.
virtual bool	hasNameForMidiBank (int bank, juce::String &name)
virtual bool	canBeAddedToRack ()
virtual bool	canBeAddedToFolderTrack ()
virtual bool	canBeAddedToMaster ()
virtual bool	canBeDisabled ()
virtual bool	canBeMoved ()
virtual bool	needsConstantBufferSize ()
	Returns true if this plugin requires a constant audio buffer size (no variable-size blocks).
virtual bool	isMissing ()
	Returns true if the plugin's backing file/DLL is missing (e.g.
virtual bool	isDisabled ()
	Returns true if the plugin has been forcibly disabled (e.g.
bool	isInRack () const
	Returns true if this plugin lives inside a RackType.
juce::ReferenceCountedObjectPtr< RackType >	getOwnerRackType () const
bool	isClipEffectPlugin () const
	Returns true if this plugin is being used as a clip effect.
virtual juce::AudioProcessor *	getWrappedAudioProcessor () const
	Returns the underlying juce::AudioProcessor, if this plugin wraps one.
AutomatableParameter::Ptr	getQuickControlParameter () const
void	setQuickControlParameter (AutomatableParameter *)
virtual void	deleteFromParent ()
	Attempts to delete this plugin, whether it's a master plugin, track plugin, etc.
void	removeFromParent ()
	Detaches the plugin from any parent it might be in.
Track *	getOwnerTrack () const
	Returns the track if it's a track or clip plugin.
Clip *	getOwnerClip () const
	Returns the clip if that's what it's in.
PluginList *	getOwnerList () const
	Returns the PluginList that contains this plugin.
Ptr	findPluginThatFeedsIntoThis () const
	Returns the previous plugin in the same PluginList, or nullptr.
Ptr	findPluginThatThisFeedsInto () const
	Returns the next plugin in the same PluginList, or nullptr.
void	changed () override
	Marks the plugin as changed and notifies the Edit.
juce::Array< ReferencedItem >	getReferencedItems () override
void	reassignReferencedItem (const ReferencedItem &, ProjectItemRef newRef, double newStartTime) override
virtual void	sourceMediaChanged ()
	Called when ProjectItem sources are re-assigned so you can reload from the new source.
bool	setPluginToMirror (const Plugin::Ptr &)
	Sets a master plugin whose settings this one will mirror.
virtual void	updateFromMirroredPluginIfNeeded (Plugin &)
	Called to pull state from the mirrored master.
Plugin::Ptr	getMirroredPlugin () const
	Returns the plugin this one is mirroring, or nullptr.
bool	baseClassNeedsInitialising () const noexcept
	Returns true if baseClassInitialise() has not yet been called (or has been fully deinitialised).
void	baseClassInitialise (const PluginInitialisationInfo &)
	Prepares the plugin for playback.
void	baseClassDeinitialise ()
	Tears down the plugin after playback.
void	setSidechainSourceID (EditItemID newID)
EditItemID	getSidechainSourceID () const
virtual std::unique_ptr< EditorComponent >	createEditor ()
	Creates a custom editor component for this plugin, or nullptr if none.
void	showWindowExplicitly ()
	Shows the plugin's editor window, creating it if necessary.
void	hideWindowForShutdown ()
	Hides the plugin window during shutdown (avoids dangling references).
juce::UndoManager *	getUndoManager () const noexcept
bool	isInitialising () const
Public Member Functions inherited from engine::Selectable
	Selectable ()
virtual	~Selectable ()
virtual void	selectionStatusChanged (bool isNowSelected)
	Can be overridden to tell this object that it has just been selected or deselected.
void	addListener (SelectableListener *)
void	removeListener (SelectableListener *)
void	addSelectableListener (SelectableListener *)
void	removeSelectableListener (SelectableListener *)
void	cancelAnyPendingUpdates ()
	If changed() has been called, this will cancel any pending async change notificaions.
void	deselect ()
void	propertiesChanged ()
void	notifyListenersOfDeletion ()
WeakRef	getWeakRef ()
Public Member Functions inherited from engine::Exportable
virtual	~Exportable ()=default
Public Member Functions inherited from engine::AutomatableEditItem
	AutomatableEditItem (Edit &, const juce::ValueTree &)
	~AutomatableEditItem () override
juce::Array< AutomatableParameter * >	getAutomatableParameters () const
int	getNumAutomatableParameters () const
AutomatableParameter::Ptr	getAutomatableParameter (int index) const
AutomatableParameter::Ptr	getAutomatableParameterByID (const juce::String &paramID) const
void	visitAllAutomatableParams (const std::function< void(AutomatableParameter &)> &visit) const
void	deleteParameter (AutomatableParameter *)
void	deleteAutomatableParameters ()
int	indexOfAutomatableParameter (const AutomatableParameter::Ptr &) const
AutomatableParameterTree &	getParameterTree () const
juce::ReferenceCountedArray< AutomatableParameter >	getFlattenedParameterTree () const
void	addParameterListChangeListener (ParameterListChangeListener *)
void	removeParameterListChangeListener (ParameterListChangeListener *)
bool	isAutomationNeeded () const noexcept
void	setAutomatableParamPosition (TimePosition)
bool	isBeingActivelyPlayed () const
virtual void	updateAutomatableParamPosition (TimePosition)
	Updates all the auto params to their positions at this time.
void	updateParameterStreams (TimePosition)
	Updates all the parameter streams to their positions at this time.
void	resetRecordingStatus ()
	Marks the end of an automation recording stream.
void	updateStreamIterators ()
void	addActiveParameter (const AutomatableParameter &)
void	removeActiveParameter (const AutomatableParameter &)
bool	isActiveParameter (AutomatableParameter &)
Public Member Functions inherited from engine::EditItem
	EditItem (EditItemID, Edit &)
	EditItem (Edit &, const juce::ValueTree &)
virtual	~EditItem ()=default
Public Member Functions inherited from engine::MacroParameterElement
	MacroParameterElement (Edit &, const juce::ValueTree &)
	Constructor.
virtual	~MacroParameterElement ()=default
	Destructor.
MacroParameterList *	getMacroParameterList ()
	If no parameters have been created, this may return nullptr.
MacroParameterList &	getMacroParameterListForWriting ()
	This ensures that the list has been created.
juce::ReferenceCountedArray< MacroParameter >	getMacroParameters () const

Static Public Member Functions
static const char *	getPluginName ()
static juce::ValueTree	create ()
Static Public Member Functions inherited from engine::Plugin
static bool	areSelectedPluginsRackable (SelectionManager &)
static RackInstance *	wrapSelectedPluginsInRack (SelectionManager &)
static void	sortPlugins (Plugin::Array &)
static void	sortPlugins (std::vector< Plugin * > &)
Static Public Member Functions inherited from engine::Selectable
static void	initialise ()
static bool	isSelectableValid (const Selectable *) noexcept
	checks whether this object has been deleted.
Static Public Member Functions inherited from engine::Exportable
static juce::Array< Exportable * >	addAllExportables (Edit &)
	Returns all the Exportables contained in an Edit.

Static Public Attributes
static const char *	xmlTypeName

Additional Inherited Members
Public Types inherited from engine::Plugin
enum class	Type { allPlugins , folderTrackPlugins , effectPlugins }
	Filter categories used when enumerating plugins. More...
using	Ptr = juce::ReferenceCountedObjectPtr< Plugin >
using	Array = juce::ReferenceCountedArray< Plugin >
Public Types inherited from engine::Selectable
using	WeakRef = juce::WeakReference< Selectable >
Public Attributes inherited from engine::Plugin
std::unique_ptr< WindowState >	windowState
Engine &	engine
juce::ValueTree	state
	The ValueTree that stores this plugin's persistent state within the Edit.
Public Attributes inherited from engine::Selectable
WeakRef::Master	masterReference
Public Attributes inherited from engine::AutomatableEditItem
juce::ValueTree	elementState
juce::CachedValue< bool >	remapOnTempoChange
Public Attributes inherited from engine::EditItem
Edit &	edit
const EditItemID	itemID
	Every EditItem has an ID which is unique within the edit.
Public Attributes inherited from engine::MacroParameterElement
Edit &	ownerEdit
juce::ValueTree	parentStateForList
Protected Member Functions inherited from engine::Plugin
void	valueTreePropertyChanged (juce::ValueTree &, const juce::Identifier &) override
void	valueTreeChanged () override
void	valueTreeChildAdded (juce::ValueTree &, juce::ValueTree &) override
void	valueTreeChildRemoved (juce::ValueTree &, juce::ValueTree &, int) override
void	valueTreeParentChanged (juce::ValueTree &) override
virtual void	processingChanged ()
	Called when the processing enabled state changes.
Protected Member Functions inherited from engine::AutomatableEditItem
virtual void	buildParameterTree () const
void	updateLastPlaybackTime ()
void	clearParameterList ()
void	addAutomatableParameter (const AutomatableParameter::Ptr &)
void	rebuildParameterTree ()
void	saveChangedParametersToState ()
	Saves the explicit value of any parameters that have deviated to the state.
void	restoreChangedParametersFromState ()
	Restores the value of any explicitly set parameters.
Protected Member Functions inherited from engine::ValueTreeAllEventListener
void	valueTreePropertyChanged (juce::ValueTree &, const juce::Identifier &) override
void	valueTreeChildAdded (juce::ValueTree &, juce::ValueTree &) override
void	valueTreeChildRemoved (juce::ValueTree &, juce::ValueTree &, int) override
void	valueTreeChildOrderChanged (juce::ValueTree &, int, int) override
void	valueTreeParentChanged (juce::ValueTree &) override
void	valueTreeRedirected (juce::ValueTree &) override
Static Protected Member Functions inherited from engine::Plugin
static void	getLeftRightChannelNames (juce::StringArray *ins, juce::StringArray *outs)
	Helper to populate stereo left/right channel name arrays.
static void	getLeftRightChannelNames (juce::StringArray *chans)
Protected Attributes inherited from engine::Plugin
juce::CachedValue< AtomicWrapper< bool > >	enabled
juce::CachedValue< bool >	frozen
juce::CachedValue< bool >	processing
juce::CachedValue< juce::String >	quickParamName
juce::CachedValue< juce::String >	customName
juce::CachedValue< EditItemID >	masterPluginID
juce::CachedValue< EditItemID >	sidechainSourceID
double	sampleRate = 44100.0
	Current sample rate and block size, set during baseClassInitialise().
int	blockSizeSamples = 512

Detailed Description

A plugin that applies an explicit channel mapping.

This allows users to remap, duplicate, or sum audio channels on a track. The mapping is stored as a serialized string of source->dest pairs in the plugin's ValueTree state.

Constructor & Destructor Documentation

ChannelMapperPlugin()

engine::ChannelMapperPlugin::ChannelMapperPlugin

(

PluginCreationInfo

)

~ChannelMapperPlugin()

engine::ChannelMapperPlugin::~ChannelMapperPlugin ( )

override

Member Function Documentation

getPluginName()

static const char * engine::ChannelMapperPlugin::getPluginName ( )

static

create()

static juce::ValueTree engine::ChannelMapperPlugin::create ( )

static

getName()

juce::String engine::ChannelMapperPlugin::getName ( ) const

overridevirtual

The name of the type, e.g.

"Compressor"

Implements engine::Plugin.

getPluginType()

juce::String engine::ChannelMapperPlugin::getPluginType ( )

overridevirtual

Returns a string identifying the plugin type (used as the XML tag name).

Implements engine::Plugin.

getShortName()

juce::String engine::ChannelMapperPlugin::getShortName ( int  )

overridevirtual

Returns an abbreviated name, ideally fitting within suggestedLength characters.

Reimplemented from engine::Plugin.

getSelectableDescription()

juce::String engine::ChannelMapperPlugin::getSelectableDescription ( )

overridevirtual

Subclasses must return a description of what they are.

Implements engine::Selectable.

takesMidiInput()

bool engine::ChannelMapperPlugin::takesMidiInput ( )

overridevirtual

Reimplemented from engine::Plugin.

canBeAddedToClip()

bool engine::ChannelMapperPlugin::canBeAddedToClip ( )

overridevirtual

Reimplemented from engine::Plugin.

producesAudioWhenNoAudioInput()

bool engine::ChannelMapperPlugin::producesAudioWhenNoAudioInput ( )

overridevirtual

Returns true if the plugin can produce audio when its input is silent (e.g.

synths, plugins with tails, or plugins driven by automation).

Reimplemented from engine::Plugin.

getBusses()

BusLayout engine::ChannelMapperPlugin::getBusses ( ) const

overridevirtual

Returns the full input/output bus layout of this plugin.

Every concrete plugin must declare its bus topology here. Multi-out plugins (e.g. ExternalPlugin hosting a VST3 with multiple output buses) report each output bus as a separate entry in the returned layout's outputs list; the first entry is the main bus.

Consumers that only need the main bus can use e.g. getBusses().outputs.front().

Implements engine::Plugin.

getNumOutputChannelsGivenInputs()

int engine::ChannelMapperPlugin::getNumOutputChannelsGivenInputs ( int  numInputChannels )

overridevirtual

Returns the number of output channels this plugin will produce for track routing.

E.g. some might be able to do mono, so will return 1 if the input is 1, 2 if it is 2, etc.

The default impl returns the number of items that getChannelNames() returns. Subclasses with sidechain buses must override this to return only the main bus output count, since sidechain channels are routed separately.

Reimplemented from engine::Plugin.

initialise()

void engine::ChannelMapperPlugin::initialise ( const PluginInitialisationInfo &  )

overridevirtual

Gives the plugin a chance to set itself up before being played.

This won't be called concurrently with the process thread.

The sample rate and the average block size - although the blocks won't always be the same, and may be bigger.

Don't call this directly or the initialise count will become out of sync.

See also

baseClassInitialise [[ message_thread ]]

Implements engine::Plugin.

deinitialise()

void engine::ChannelMapperPlugin::deinitialise ( )

overridevirtual

Called after play stops to release resources.

Don't call this directly or the initialise count will become out of sync.

See also

baseClassDeinitialise

Implements engine::Plugin.

applyToBuffer()

void engine::ChannelMapperPlugin::applyToBuffer ( const PluginRenderContext &  )

overridevirtual

Process the next block of data.

The incoming buffer will have an unknown number of channels, and the plugin has to deal with them however it wants to.

The buffer should be resized to the number of output channels that the plugin wants to return (which should be the same or less than the number of output channel names it returns from getChannelNames() - never more than this).

Implements engine::Plugin.

restorePluginStateFromValueTree()

void engine::ChannelMapperPlugin::restorePluginStateFromValueTree ( const juce::ValueTree &  )

overridevirtual

Reimplemented from engine::AutomatableEditItem.

getChannelMap()

ChannelMap engine::ChannelMapperPlugin::getChannelMap

(

)

const

Returns the current channel map.

setChannelMap()

void engine::ChannelMapperPlugin::setChannelMap

(

const ChannelMap &

)

Sets a new channel map and stores it in the plugin state.

getNumInputChannels()

int engine::ChannelMapperPlugin::getNumInputChannels

(

)

const

Returns the number of input channels configured.

getNumOutputChannels()

int engine::ChannelMapperPlugin::getNumOutputChannels

(

)

const

Returns the number of output channels configured.

setNumInputChannels()

void engine::ChannelMapperPlugin::setNumInputChannels

(

int

)

Sets the number of input channels.

setNumOutputChannels()

void engine::ChannelMapperPlugin::setNumOutputChannels

(

int

)

Sets the number of output channels.

Member Data Documentation

xmlTypeName

const char* engine::ChannelMapperPlugin::xmlTypeName

static

---

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

• tracktion_ChannelMapperPlugin.h