vital::FormantModule Class Reference

A module that applies various formant filtering styles to an incoming audio signal. More...

#include <formant_module.h>

Inheritance diagram for vital::FormantModule:

Public Types
enum	{   kAudio , kReset , kResonance , kBlend ,   kStyle , kNumInputs }
	Input parameter indices for the FormantModule. More...

Public Member Functions
	FormantModule (std::string prefix="")
	Constructs a FormantModule, optionally with a parameter prefix for distinguishing multiple instances.
virtual	~FormantModule ()
Output *	createModControl (std::string name, bool audio_rate=false, bool smooth_value=false)
	Creates a modulation control (parameter) that can be mono or poly depending on the module settings.
void	init () override
	Initializes the FormantModule, creating formant filters and connecting parameters.
void	process (int num_samples) override
	Processes a block of samples. Chooses the appropriate formant filter style and processes audio.
void	reset (poly_mask reset_mask) override
	Resets the currently active formant filter for a given set of voices (indicated by the reset_mask).
void	hardReset () override
	Performs a hard reset of the currently active formant filter, clearing its internal state.
void	setMono (bool mono)
	Sets whether the module is operating in mono mode or not.
virtual Processor *	clone () const override
	Creates a clone of this FormantModule with identical settings.
Public Member Functions inherited from vital::SynthModule
	SynthModule (int num_inputs, int num_outputs, bool control_rate=false)
	Constructs a SynthModule with specified I/O and control rate.
virtual	~SynthModule ()
	Destructor.
control_map	getControls ()
	Returns a map of all controls from this module and its submodules.
Output *	getModulationSource (std::string name)
	Retrieves a modulation source output by name.
const StatusOutput *	getStatusOutput (std::string name) const
	Retrieves a StatusOutput by name.
Processor *	getModulationDestination (std::string name, bool poly)
	Retrieves a modulation destination Processor by name and poly mode.
Processor *	getMonoModulationDestination (std::string name)
	Retrieves a mono modulation destination by name.
Processor *	getPolyModulationDestination (std::string name)
	Retrieves a poly modulation destination by name.
ValueSwitch *	getModulationSwitch (std::string name, bool poly)
	Retrieves a modulation switch by name and poly mode.
ValueSwitch *	getMonoModulationSwitch (std::string name)
	Retrieves a mono modulation switch by name.
ValueSwitch *	getPolyModulationSwitch (std::string name)
	Retrieves a poly modulation switch by name.
void	updateAllModulationSwitches ()
	Updates all modulation switches based on whether their destinations have inputs.
output_map &	getModulationSources ()
	Returns a reference to the map of modulation sources.
input_map &	getMonoModulationDestinations ()
	Returns a reference to the map of mono modulation destinations.
input_map &	getPolyModulationDestinations ()
	Returns a reference to the map of poly modulation destinations.
virtual output_map &	getMonoModulations ()
	Returns a reference to the map of mono modulation readouts.
virtual output_map &	getPolyModulations ()
	Returns a reference to the map of poly modulation readouts.
virtual void	correctToTime (double seconds)
	Allows correction of module state to a given time (if needed).
void	enableOwnedProcessors (bool enable)
	Enables or disables all owned processors.
virtual void	enable (bool enable) override
	Enables or disables this SynthModule and its owned processors.
void	addMonoProcessor (Processor *processor, bool own=true)
	Adds a mono processor to this module.
void	addIdleMonoProcessor (Processor *processor)
	Adds a mono processor that is considered idle (not part of main processing chain).
void	addSubmodule (SynthModule *module)
	Adds a submodule to this SynthModule.
Public Member Functions inherited from vital::ProcessorRouter
	ProcessorRouter (int num_inputs=0, int num_outputs=0, bool control_rate=false)
	Constructs a ProcessorRouter with a specified number of inputs and outputs.
	ProcessorRouter (const ProcessorRouter &original)
	Copy constructor. Creates a new ProcessorRouter from an existing one.
virtual	~ProcessorRouter ()
	Destructor.
virtual void	setSampleRate (int sample_rate) override
	Sets the sample rate for all Processors in this router.
virtual void	setOversampleAmount (int oversample) override
	Sets the oversampling amount for all Processors in this router.
virtual void	addProcessor (Processor *processor)
	Adds a Processor to be managed by this router.
virtual void	addProcessorRealTime (Processor *processor)
	Adds a Processor to the router in real-time (no memory allocations).
virtual void	addIdleProcessor (Processor *processor)
	Adds a Processor that should remain idle (not processed) in the router.
virtual void	removeProcessor (Processor *processor)
	Removes a Processor from this router.
void	connect (Processor *destination, const Output *source, int index)
	Connects a source Output to a destination Processor input by index.
void	disconnect (const Processor *destination, const Output *source)
	Disconnects a source Output from a destination Processor.
bool	isDownstream (const Processor *first, const Processor *second) const
	Checks if one Processor is downstream from another, i.e., if there's a path from the second to the first.
bool	areOrdered (const Processor *first, const Processor *second) const
	Checks if the order of two Processors is fixed in the router's processing sequence.
virtual bool	isPolyphonic (const Processor *processor) const
	Determines if a given Processor is polyphonic within this router.
virtual ProcessorRouter *	getMonoRouter ()
	Gets the mono router that corresponds to this ProcessorRouter.
virtual ProcessorRouter *	getPolyRouter ()
	Gets the polyphonic router that corresponds to this ProcessorRouter.
virtual void	resetFeedbacks (poly_mask reset_mask)
	Resets all Feedback nodes within this router using a reset mask.
Public Member Functions inherited from vital::Processor
	Processor (int num_inputs, int num_outputs, bool control_rate=false, int max_oversample=1)
	Constructs a Processor with a given number of inputs/outputs and oversampling.
virtual	~Processor ()
	Virtual destructor.
virtual bool	hasState () const
	Indicates whether this Processor requires per-voice state.
virtual void	processWithInput (const poly_float *audio_in, int num_samples)
	An optional processing function taking explicit input buffer. Fallback is an assertion failure (not supported).
bool	initialized ()
	Returns whether this Processor has been initialized.
force_inline bool	enabled () const
	Checks if this Processor is enabled.
force_inline int	getSampleRate () const
	Retrieves the current (effective) sample rate.
force_inline int	getOversampleAmount () const
	Retrieves the current oversampling factor.
force_inline bool	isControlRate () const
	Checks if this Processor is running at control rate (buffer_size == 1).
virtual void	setControlRate (bool control_rate)
	Sets whether this Processor runs at control rate.
force_inline poly_mask	getResetMask (int input_index) const
	Retrieves a mask indicating which voices triggered a note-on event. Compares the input's trigger_value to kVoiceOn.
force_inline void	clearOutputBufferForReset (poly_mask reset_mask, int input_index, int output_index) const
	Clears output samples for voices that are about to be reset, based on the trigger offset.
bool	inputMatchesBufferSize (int input=0)
	Checks whether the buffer size of a particular input matches the size needed by this Processor.
bool	checkInputAndOutputSize (int num_samples)
	Checks if all inputs and outputs have buffers big enough for num_samples.
virtual bool	isPolyphonic () const
	Checks if this Processor is polyphonic by querying its ProcessorRouter.
void	plug (const Output *source)
	Connects an external Output to this Processor's first input.
void	plug (const Output *source, unsigned int input_index)
	Connects an external Output to a specified input index.
void	plug (const Processor *source)
	Connects the first output of a Processor to this Processor's first input.
void	plug (const Processor *source, unsigned int input_index)
	Connects the first output of a Processor to a specified input index.
void	plugNext (const Output *source)
	Connects an external Output to the first available (unplugged) input.
void	plugNext (const Processor *source)
	Connects the first output of a Processor to the first available (unplugged) input.
void	useInput (Input *input)
	Uses an existing Input object as this Processor's first input.
void	useInput (Input *input, int index)
	Uses an existing Input object at a specified input index.
void	useOutput (Output *output)
	Uses an existing Output object as this Processor's first output.
void	useOutput (Output *output, int index)
	Uses an existing Output object at a specified output index.
int	connectedInputs ()
	Counts how many inputs are connected to a real source (not null_source_).
virtual void	unplugIndex (unsigned int input_index)
	Removes the connection at a specified input index, if any.
virtual void	unplug (const Output *source)
	Removes a connection to a given Output from all inputs.
virtual void	unplug (const Processor *source)
	Removes connections to all outputs from a given Processor.
virtual void	numInputsChanged ()
	Called when the number of inputs changes (e.g., new connections). Subclasses may override for dynamic behavior.
force_inline void	router (ProcessorRouter *router)
	Sets the ProcessorRouter that owns or manages this Processor.
force_inline ProcessorRouter *	router () const
	Returns the ProcessorRouter that currently owns this Processor.
ProcessorRouter *	getTopLevelRouter () const
	Gets the topmost (root) ProcessorRouter by traversing parent routers.
virtual void	registerInput (Input *input, int index)
	Registers a new input, appending it to the input list.
virtual Output *	registerOutput (Output *output, int index)
	Registers a new Output in the output list at a specified index.
virtual void	registerInput (Input *input)
	Registers a new Input by appending it to the end of the input list.
virtual Output *	registerOutput (Output *output)
	Registers a new Output by appending it to the end of the output list.
force_inline int	numInputs () const
	Returns the total number of Input pointers (owned or otherwise).
force_inline int	numOutputs () const
	Returns the total number of Output pointers (owned or otherwise).
force_inline int	numOwnedInputs () const
	Returns how many Input objects this Processor owns.
force_inline int	numOwnedOutputs () const
	Returns how many Output objects this Processor owns.
force_inline Input *	input (unsigned int index=0) const
	Retrieves the Input pointer at a given index.
force_inline bool	isInputSourcePolyphonic (int index=0)
	Checks if the input source at a given index is polyphonic.
force_inline Input *	ownedInput (unsigned int index=0) const
	Retrieves an owned Input pointer at a given index.
force_inline Output *	output (unsigned int index=0) const
	Retrieves the Output pointer at a given index.
force_inline Output *	ownedOutput (unsigned int index=0) const
	Retrieves an owned Output pointer at a given index.
void	setPluggingStart (int start)
	Sets the position at which plugNext starts searching for an open input.

Protected Member Functions
void	setStyle (int new_style)
	Sets the currently active formant filter style, enabling and disabling submodules as necessary.
Protected Member Functions inherited from vital::SynthModule
Value *	createBaseControl (std::string name, bool audio_rate=false, bool smooth_value=false)
	Creates a simple control processor for a given parameter name.
Output *	createBaseModControl (std::string name, bool audio_rate=false, bool smooth_value=false, Output *internal_modulation=nullptr)
	Creates a base mod control, which is a control combined with a modulation input.
Output *	createMonoModControl (std::string name, bool audio_rate=false, bool smooth_value=false, Output *internal_modulation=nullptr)
	Creates a monophonic mod control, including applying parameter scaling.
Output *	createPolyModControl (std::string name, bool audio_rate=false, bool smooth_value=false, Output *internal_modulation=nullptr, Input *reset=nullptr)
	Creates a polyphonic mod control, including applying parameter scaling.
Output *	createTempoSyncSwitch (std::string name, Processor *frequency, const Output *beats_per_second, bool poly, Input *midi=nullptr)
	Creates a tempo sync switch that toggles between tempo-based frequency and free-running frequency.
void	createStatusOutput (std::string name, Output *source)
	Creates a status output associated with a given Output.
Protected Member Functions inherited from vital::ProcessorRouter
virtual void	addFeedback (Feedback *feedback)
	Adds a Feedback node to handle a feedback loop introduced by a connection.
virtual void	removeFeedback (Feedback *feedback)
	Removes a previously added Feedback node.
void	reorder (Processor *processor)
	Reorders the internal processing sequence to account for a Processor's dependencies.
virtual void	updateAllProcessors ()
	Updates all processors to match the global order. Called when changes occur.
force_inline bool	shouldUpdate ()
	Checks if local changes need to be synchronized with global changes.
virtual void	createAddedProcessors ()
	Creates any processors that were added at the global level but not yet replicated locally.
virtual void	deleteRemovedProcessors ()
	Deletes any processors that were removed at the global level but not yet removed locally.
const Processor *	getContext (const Processor *processor) const
	Gets the processor context within this router for a global Processor reference.
void	getDependencies (const Processor *processor) const
	Populates the internal dependencies structure for a given Processor.
Processor *	getLocalProcessor (const Processor *global_processor)
	Retrieves the local instance of a globally defined Processor.
Protected Member Functions inherited from vital::Processor
Output *	addOutput (int oversample=1)
	Creates and registers a new Output. Handles control rate vs. audio rate.
Input *	addInput ()
	Creates and registers a new Input, initially connected to null_source_.

Protected Attributes
std::string	prefix_
	Prefix for parameter naming.
Processor *	formant_filters_ [FormantFilter::kTotalFormantFilters]
	Array holding all possible formant filter styles.
int	last_style_
	Tracks the currently active style.
bool	mono_
	True if running in mono mode, false for polyphonic.
Protected Attributes inherited from vital::SynthModule
std::shared_ptr< ModuleData >	data_
	Shared data storage for this SynthModule.
Protected Attributes inherited from vital::ProcessorRouter
std::shared_ptr< CircularQueue< Processor * > >	global_order_
	Global processing order reference.
std::shared_ptr< CircularQueue< Processor * > >	global_reorder_
	Temporary storage for reorder operations.
CircularQueue< Processor * >	local_order_
	Local ordering of Processors.
std::map< const Processor *, std::pair< int, std::unique_ptr< Processor > > >	processors_
	Map of global to local Processors.
std::map< const Processor *, std::unique_ptr< Processor > >	idle_processors_
	Idle Processors that are not active in the graph.
std::shared_ptr< std::vector< const Feedback * > >	global_feedback_order_
	Global order of Feedback nodes.
std::vector< Feedback * >	local_feedback_order_
	Local copies of Feedback nodes.
std::map< const Processor *, std::pair< int, std::unique_ptr< Feedback > > >	feedback_processors_
	Map of global to local Feedback processors.
std::shared_ptr< int >	global_changes_
	Global change counter.
int	local_changes_
	Local change counter to track synchronization with global changes.
std::shared_ptr< CircularQueue< const Processor * > >	dependencies_
	Queue for dependencies calculations.
std::shared_ptr< CircularQueue< const Processor * > >	dependencies_visited_
	Queue of visited processors for dependencies calc.
std::shared_ptr< CircularQueue< const Processor * > >	dependency_inputs_
	Queue of processors to check inputs for dependencies.
Protected Attributes inherited from vital::Processor
std::shared_ptr< ProcessorState >	state_
	Shared state (sample rate, oversample, etc.)
int	plugging_start_
	The index at which plugNext starts searching for an unplugged input.
std::vector< std::shared_ptr< Input > >	owned_inputs_
	Inputs owned by this Processor.
std::vector< std::shared_ptr< Output > >	owned_outputs_
	Outputs owned by this Processor.
std::shared_ptr< std::vector< Input * > >	inputs_
	All inputs, owned or external.
std::shared_ptr< std::vector< Output * > >	outputs_
	All outputs, owned or external.
ProcessorRouter *	router_
	The ProcessorRouter that manages this Processor.

Additional Inherited Members
Static Protected Attributes inherited from vital::Processor
static const Output	null_source_
	A null (dummy) source used for unconnected inputs.

Detailed Description

A module that applies various formant filtering styles to an incoming audio signal.

The FormantModule provides a selection of different formant filter styles, allowing morphing between vowel shapes or other spectral formant distributions. Parameters such as formant position (X, Y), transpose, resonance, and spread can be controlled, and the filter style can be changed dynamically.

Member Enumeration Documentation

anonymous enum

anonymous enum

Input parameter indices for the FormantModule.

• kAudio: The input audio signal to be filtered.
• kReset: Reset trigger to reinitialize the filter state.
• kResonance: Resonance control for the formant filters.
• kBlend: Blending control, used by the VocalTract style for interpolation.
• kStyle: Selects which formant filter style to use.

Enumerator
kAudio
kReset
kResonance
kBlend
kStyle
kNumInputs

Constructor & Destructor Documentation

FormantModule()

vital::FormantModule::FormantModule

(

std::string

prefix = ""

)

Constructs a FormantModule, optionally with a parameter prefix for distinguishing multiple instances.

Parameters

prefix

A string prefix applied to parameter names.

~FormantModule()

virtual vital::FormantModule::~FormantModule ( )

inlinevirtual

Member Function Documentation

clone()

virtual Processor * vital::FormantModule::clone ( ) const

inlineoverridevirtual

Creates a clone of this FormantModule with identical settings.

Returns

A pointer to the newly cloned FormantModule instance.

Reimplemented from vital::SynthModule.

createModControl()

Output * vital::FormantModule::createModControl	(	std::string	name,
		bool	audio_rate = false,
		bool	smooth_value = false )

Creates a modulation control (parameter) that can be mono or poly depending on the module settings.

Parameters

name	The name of the parameter.
audio_rate	True for audio-rate modulation, false for control-rate.
smooth_value	True if the parameter changes should be smoothed over time.

Returns

A pointer to the newly created Output parameter object.

Creates a modulation parameter either as mono or poly depending on the mono_ flag.

If mono_, creates a mono mod control; otherwise, creates a poly mod control, connecting the poly mod control's reset input to this module's reset input for proper voice handling.

hardReset()

void vital::FormantModule::hardReset ( )

overridevirtual

Performs a hard reset of the currently active formant filter, clearing its internal state.

Performs a hard reset on the currently active formant filter.

Reimplemented from vital::Processor.

init()

void vital::FormantModule::init ( )

overridevirtual

Initializes the FormantModule, creating formant filters and connecting parameters.

Initializes all formant filter styles and a VocalTract processor, plugging in parameters for X, Y, transpose, etc.

Reimplemented from vital::ProcessorRouter.

process()

void vital::FormantModule::process ( int num_samples )

overridevirtual

Processes a block of samples. Chooses the appropriate formant filter style and processes audio.

Parameters

num_samples

The number of samples to process in the current block.

Reads the style parameter from input(kStyle) and sets the active formant filter style accordingly. Then processes the current block of audio samples through the active formant filter.

Reimplemented from vital::ProcessorRouter.

reset()

void vital::FormantModule::reset ( poly_mask reset_mask )

overridevirtual

Resets the currently active formant filter for a given set of voices (indicated by the reset_mask).

Parameters

reset_mask

A mask indicating which voices should be reset.

Resets the currently active formant filter.

Reimplemented from vital::Processor.

setMono()

void vital::FormantModule::setMono ( bool mono )

inline

Sets whether the module is operating in mono mode or not.

Parameters

mono	True if the module should be mono, false if polyphonic.

setStyle()

force_inline void vital::FormantModule::setStyle ( int new_style )

protected

Sets the currently active formant filter style, enabling and disabling submodules as necessary.

Parameters

new_style

The index of the new style (from 0 to FormantFilter::kTotalFormantFilters - 1).

Switches the active formant filter style, enabling the new one and disabling the old one. Also resets the newly activated filter to ensure a clean start.

Member Data Documentation

formant_filters_

Processor* vital::FormantModule::formant_filters_[FormantFilter::kTotalFormantFilters]

protected

Array holding all possible formant filter styles.

last_style_

int vital::FormantModule::last_style_

protected

Tracks the currently active style.

mono_

bool vital::FormantModule::mono_

protected

True if running in mono mode, false for polyphonic.

prefix_

std::string vital::FormantModule::prefix_

protected

Prefix for parameter naming.

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

• /Users/davidvogel/repos/VitalHelp/src/synthesis/modules/formant_module.h
• /Users/davidvogel/repos/VitalHelp/src/synthesis/modules/formant_module.cpp