A class that produces delay effects which can be independently changed per channel. More...

#include <omSoundMultichannelDelay.h>

Inheritance diagram for om::sound::filters::MultichannelDelay:

Public Types
enum	DelayType { COMB = 0, ALL_PASS = 1 }
	An enum type which describes the various types of delay effects that a Delay can produce. More...

Public Member Functions
	MultichannelDelay ()
	Create a multichannel comb delay filter with 500ms delay time, 0 delay feedback, 0dB delay gain, and 0dB dry gain. More...

	MultichannelDelay (Float newDelayTime, Gain newFeedbackGain, Gain newDelayGain, Gain newDryGain)
	Create a multichannel comb delay filter with the specified delay parameters. More...

	MultichannelDelay (DelayType newType, Float newDelayTime, Gain newFeedbackGain, Gain newDelayGain, Gain newDryGain)
	Create a multichannel delay filter with the specified type and delay parameters. More...

DelayType	getType () const
	Return the kind of delay effect that this delay filter is producing. More...

void	setType (DelayType newType)
	Set the kind of delay effect that this delay filter is producing. More...

Float	getDelayTime (Index channelIndex) const
	Return the delay time for the specified delay filter channel in seconds. More...

void	setDelayTime (Index channelIndex, Float newDelayTime)
	Set the delay time for the specified delay filter channel in seconds. More...

void	setDelayTime (Float newDelayTime)
	Set the delay time for all of this delay filter's channels in seconds. More...

Float	getDecayTime (Index channelIndex) const
	Return the time it takes for the output of the specified delay filter channel to decay to -60dB. More...

void	setDecayTime (Index channelIndex, Float newDecayTime)
	Set the time it takes for the output of the specified delay filter channel to decay to -60dB. More...

void	setDecayTime (Float newDecayTime)
	Set the time it takes for the output of the all delay filter channels to decay to -60dB. More...

Gain	getFeedbackGain (Index channelIndex) const
	Return the feedback gain for the specified channel of this delay filter. More...

Gain	getFeedbackGainDB (Index channelIndex) const
	Return the feedback gain for the specified channel of this delay filter in decibels. More...

void	setFeedbackGain (Index channelIndex, Gain newFeedbackGain)
	Set the feedback gain for the specified channel of this delay filter. More...

void	setFeedbackGainDB (Index channelIndex, Gain newFeedbackGain)
	Set the feedback gain for the specified channel of this delay filter in decibels. More...

void	setFeedbackGain (Gain newFeedbackGain)
	Set the feedback gain for all channels of this delay filter. More...

void	setFeedbackGainDB (Gain newFeedbackGain)
	Set the feedback gain for all channels of this delay filter. More...

Float	getChannelPhase (Index channelIndex) const
	Return the delay phase offset of the channel with the specified index. More...

void	setChannelPhase (Index channelIndex, Float newPhase)
	Set the delay phase offset of the channel with the specified index. More...

void	setChannelPhase (Float newPhase)
	Set the delay phase offset for all channels. More...

Gain	getDelayGain () const
	Return the linear delay gain of this multichannel delay filter. More...

Gain	getDelayGainDB () const
	Return the delay gain of this multichannel delay filter in decibels. More...

void	setDelayGain (Gain newDelayGain)
	Set the linear delay gain of this multichannel delay filter. More...

void	setDelayGainDB (Gain newDelayGain)
	Set the delay gain of this multichannel delay filter in decibels. More...

Gain	getDryGain () const
	Return the linear dry gain of this multichannel delay filter. More...

Gain	getDryGainDB () const
	Return the dry gain of this multichannel delay filter in decibels. More...

void	setDryGain (Gain newDryGain)
	Set the linear dry gain of this multichannel delay filter. More...

void	setDryGainDB (Gain newDryGain)
	Set the dry gain of this multichannel delay filter in decibels. More...

virtual UTF8String	getName () const
	Return a human-readable name for this multichannel delay filter. More...

virtual UTF8String	getManufacturer () const
	Return the manufacturer name of this multichannel delay filter. More...

virtual FilterVersion	getVersion () const
	Return an object representing the version of this multichannel delay filter. More...

virtual FilterCategory	getCategory () const
	Return an object that describes the category of effect that this filter implements. More...

virtual Size	getParameterCount () const
	Return the total number of generic accessible parameters this multichannel delay filter has. More...

virtual Bool	getParameterInfo (Index parameterIndex, FilterParameterInfo &info) const
	Get information about the multichannel delay filter parameter at the specified index. More...

virtual Bool	getParameterValueName (Index parameterIndex, const FilterParameter &value, UTF8String &name) const
	Get any special name associated with the specified value of an indexed parameter. More...

Public Member Functions inherited from om::sound::filters::SoundFilter
virtual	~SoundFilter ()
	Destroy this sound filter object. More...

SoundResult	read (SoundBuffer &outputBuffer, Size numSamples)
	Fill the specified output buffer with the requested number of samples, based on internal filter state. More...

SoundResult	read (SoundFrame &outputFrame, Size numSamples)
	Fill the specified output frame with the requested number of samples, based on internal filter state. More...

SoundResult	write (const SoundBuffer &inputBuffer, Size numSamples)
	Process the specified input buffer samples and do something with them. More...

SoundResult	write (const SoundFrame &inputFrame, Size numSamples)
	Process the specified input frame samples and do something with them. More...

SoundResult	process (const SoundBuffer &inputBuffer, SoundBuffer &outputBuffer, Size numSamples)
	Apply this filter to the specified input buffer data, placing the result in the output buffer. More...

SoundResult	process (const SoundBuffer &inputBuffer, SoundFrame &outputFrame, Size numSamples)
	Apply this filter to the specified input buffer data, placing the result in the output frame. More...

SoundResult	process (const SoundFrame &inputFrame, SoundFrame &outputFrame, Size numSamples)
	Apply this filter to the specified input frame data, placing the result in the output frame. More...

SoundResult	process (const SoundFrame &inputBuffer, SoundBuffer &outputBuffer, Size numSamples)
	Apply this filter to the specified input frame data, placing the result in the output buffer. More...

void	reset ()
	Signal to the filter that the audio stream is restarting. More...

UInt64	getFrameIndex () const
	Return the index of the next frame to be processed (or the current one if currently processing). More...

Size	getInputCount () const
	Return the current number of audio inputs that this filter has. More...

virtual UTF8String	getInputName (Index inputIndex) const
	Return a human-readable name of the filter audio input at the specified index. More...

Size	getOutputCount () const
	Return the current number of audio outputs that this filter has. More...

virtual UTF8String	getOutputName (Index outputIndex) const
	Return a human-readable name of the filter audio output at the specified index. More...

Size	getMIDIInputCount () const
	Return the current number of MIDI inputs that this filter has. More...

virtual UTF8String	getMIDIInputName (Index inputIndex) const
	Return a human-readable name of the filter MIDI input at the specified index. More...

Size	getMIDIOutputCount () const
	Return the current number of MIDI outputs that this filter has. More...

virtual UTF8String	getMIDIOutputName (Index outputIndex) const
	Return a human-readable name of the filter MIDI output at the specified index. More...

virtual Time	getLatency () const
	Return a Time value indicating the latency of this sound filter in seconds. More...

virtual Bool	getParameterIndex (const UTF8String &parameterName, Index &parameterIndex) const
	Query the index of the parameter with the specified name. More...

Bool	getParameter (Index parameterIndex, FilterParameter &value) const
	Place the value of the parameter at the specified index in the output parameter. More...

Bool	getParameter (Index parameterIndex, Bool &value) const
	Place the value of the parameter at the specified index in the output parameter. More...

Bool	getParameter (Index parameterIndex, Int64 &value) const
	Place the value of the parameter at the specified index in the output parameter. More...

Bool	getParameter (Index parameterIndex, Float32 &value) const
	Place the value of the parameter at the specified index in the output parameter. More...

Bool	getParameter (Index parameterIndex, Float64 &value) const
	Place the value of the parameter at the specified index in the output parameter. More...

template<typename ParameterType >
Bool	getParameter (const UTF8String &name, ParameterType &value) const
	Place the value of the parameter with the specified name in the output parameter. More...

template<typename ParameterType >
Bool	getParameter (const char *name, ParameterType &value) const
	Place the value of the parameter with the specified name in the output parameter. More...

Bool	setParameter (Index parameterIndex, const FilterParameter &value)
	Attempt to set the parameter value at the specified index. More...

Bool	setParameter (Index parameterIndex, Bool value)
	Attempt to set the parameter value at the specified index. More...

Bool	setParameter (Index parameterIndex, Int64 value)
	Attempt to set the parameter value at the specified index. More...

Bool	setParameter (Index parameterIndex, Float32 value)
	Attempt to set the parameter value at the specified index. More...

Bool	setParameter (Index parameterIndex, Float64 value)
	Attempt to set the parameter value at the specified index. More...

template<typename ParameterType >
Bool	setParameter (const UTF8String &name, ParameterType value)
	Attempt to set the parameter value with the specified name. More...

template<typename ParameterType >
Bool	setParameter (const char *name, ParameterType value)
	Attempt to set the parameter value with the specified name. More...

virtual Bool	writeState (DataOutputStream &stream) const
	Write the current state of this sound filter to a data output stream. More...

virtual Bool	readState (DataInputStream &stream)
	Read a previously saved filter state from the specified data input stream and replace the filter's state. More...

virtual Size	getPresetCount () const
	Return the number of standard configuration presets that this sound filter has. More...

virtual Bool	getPreset (Index presetIndex, FilterPreset &preset) const
	Get the standard preset for this sound filter with the specified index. More...

Bool	getIsSynchronized () const
	Return whether or not this sound filter performs thread synchronization. More...

void	setIsSynchronized (Bool newIsSynchronized)
	Set whether or not this sound filter performs thread synchronization. More...

virtual Bool	allowsInPlaceProcessing () const
	Return whether or not this sound filter can process audio data in-place. More...

Static Public Attributes
static const UTF8String	NAME
	A string indicating the human-readable name of this multichannel delay filter. More...

static const UTF8String	MANUFACTURER
	A string indicating the manufacturer name of this multichanel delay filter. More...

static const FilterVersion	VERSION
	An object indicating the version of this multichannel delay filter. More...

Static Public Attributes inherited from om::sound::filters::SoundFilter
static const om::resources::ResourceType	RESOURCE_TYPE
	The resource type for a sound filter. More...

Additional Inherited Members
Static Public Member Functions inherited from om::sound::filters::SoundFilter
static Size	getMaximumNumberOfInputs ()
	Return the maximum number of audio inputs that a SoundFilter can support. More...

static Size	getMaximumNumberOfOutputs ()
	Return the maximum number of audio outputs that a SoundFilter can support. More...

static Size	getMaximumNumberOfMIDIInputs ()
	Return the maximum number of MIDI inputs that a SoundFilter can support. More...

static Size	getMaximumNumberOfMIDIOutputs ()
	Return the maximum number of MIDI outputs that a SoundFilter can support. More...

Protected Member Functions inherited from om::sound::filters::SoundFilter
	SoundFilter ()
	Create a new sound filter with 1 audio input and output, and no MIDI inputs or outputs. More...

	SoundFilter (Size numInputs, Size numOutputs)
	Create a new sound filter with the specified number of audio inputs and outputs. More...

	SoundFilter (Size numInputs, Size numOutputs, Size numMIDIInputs, Size numMIDIOutputs)
	Create a new sound filter with the specified number of audio inputs and outputs. More...

void	setInputCount (Size newNumInputs)
	Set the number of inputs that this filter should have. More...

void	setOutputCount (Size newNumOutputs)
	Set the number of outputs that this filter should have. More...

void	setMIDIInputCount (Size newNumMIDIInputs)
	Set the number of MIDI inputs that this filter should have. More...

void	setMIDIOutputCount (Size newNumMIDIOutputs)
	Set the number of MIDI outputs that this filter should have. More...

Bool	isFirstFrame () const
	Return whether or not the filter's next frame to be processed is also its first frame. More...

void	lockMutex () const
	Acquire a mutex which handles subclass rendering parameter synchronization. More...

void	unlockMutex () const
	Release a mutex which handles subclass rendering parameter synchronization. More...

Detailed Description

A class that produces delay effects which can be independently changed per channel.

This class represents a generic delay-style effect. It can be switched between comb filtering and all-pass delay. This class can also be used to implement a simple delay filter with basic delay time, feedback, and mix controls. It may also be used as a building block for more complex effects like a Schroeder reverberator.

Having explicit control of the delay times and feedback gains for the different channels allows different echo patterns for each channel, increasing stereo imaging. It is often useful to use a set of delay filters with different delay times for each channel to approximate a reverb tail.

Member Enumeration Documentation

enum om::sound::filters::MultichannelDelay::DelayType

An enum type which describes the various types of delay effects that a Delay can produce.

Enumerator
COMB	The delay filter behaves as a delay filter (the same as a standard delay effect).
ALL_PASS	The delay filter behaves as an all-pass filter.

Constructor & Destructor Documentation

om::sound::filters::MultichannelDelay::MultichannelDelay ( )

Create a multichannel comb delay filter with 500ms delay time, 0 delay feedback, 0dB delay gain, and 0dB dry gain.

om::sound::filters::MultichannelDelay::MultichannelDelay	(	Float	newDelayTime,
		Gain	newFeedbackGain,
		Gain	newDelayGain,
		Gain	newDryGain
	)

Create a multichannel comb delay filter with the specified delay parameters.

This constructor creates a filter with the specified delay time, delay feedback gain, delay output gain, and input-to-output gain.

om::sound::filters::MultichannelDelay::MultichannelDelay	(	DelayType	newType,
		Float	newDelayTime,
		Gain	newFeedbackGain,
		Gain	newDelayGain,
		Gain	newDryGain
	)

Create a multichannel delay filter with the specified type and delay parameters.

This constructor creates a filter with the specified delay time, delay feedback gain, delay output gain, and input-to-output gain.

Member Function Documentation

DelayType om::sound::filters::MultichannelDelay::getType ( ) const

inline

Return the kind of delay effect that this delay filter is producing.

void om::sound::filters::MultichannelDelay::setType ( DelayType newType )

inline

Set the kind of delay effect that this delay filter is producing.

Float om::sound::filters::MultichannelDelay::getDelayTime ( Index channelIndex ) const

inline

Return the delay time for the specified delay filter channel in seconds.

void om::sound::filters::MultichannelDelay::setDelayTime	(	Index	channelIndex,
		Float	newDelayTime
	)

Set the delay time for the specified delay filter channel in seconds.

void om::sound::filters::MultichannelDelay::setDelayTime ( Float newDelayTime )

Set the delay time for all of this delay filter's channels in seconds.

Float om::sound::filters::MultichannelDelay::getDecayTime ( Index channelIndex ) const

inline

Return the time it takes for the output of the specified delay filter channel to decay to -60dB.

This method computes the decay time of the multichannel delay filter using the current values for the feedback gain and delay time of the multichannel delay filter.

void om::sound::filters::MultichannelDelay::setDecayTime	(	Index	channelIndex,
		Float	newDecayTime
	)

Set the time it takes for the output of the specified delay filter channel to decay to -60dB.

This method uses the current multichannel delay filter delay time to compute the feedback gain necessary to produce the desired decay time.

void om::sound::filters::MultichannelDelay::setDecayTime ( Float newDecayTime )

Set the time it takes for the output of the all delay filter channels to decay to -60dB.

This method uses the current multichannel delay filter delay time to compute the feedback gain necessary to produce the desired decay time.

Gain om::sound::filters::MultichannelDelay::getFeedbackGain ( Index channelIndex ) const

inline

Return the feedback gain for the specified channel of this delay filter.

This value represents how much of each output delay sample is sent back to the delay buffer during each pass over the delay buffer. This value should be between -0.99999 and 0.99999 in order to ensure filter stability.

Gain om::sound::filters::MultichannelDelay::getFeedbackGainDB ( Index channelIndex ) const

inline

Return the feedback gain for the specified channel of this delay filter in decibels.

This value represents the gain applied to the output delay sample that is sent back to the delay buffer during each pass over the delay buffer. This value should be between -infinity and -0.00001 in order to ensure filter stability.

void om::sound::filters::MultichannelDelay::setFeedbackGain	(	Index	channelIndex,
		Gain	newFeedbackGain
	)

Set the feedback gain for the specified channel of this delay filter.

This value represents how much of each output delay sample is sent back to the delay buffer during each pass over the delay buffer. This value is clamped to be between -0.99999 and 0.99999 in order to ensure filter stability.

void om::sound::filters::MultichannelDelay::setFeedbackGainDB	(	Index	channelIndex,
		Gain	newFeedbackGain
	)

inline

Set the feedback gain for the specified channel of this delay filter in decibels.

This value represents the gain applied to the output delay sample that is sent back to the delay buffer during each pass over the delay buffer. This value should be between -infinity and -0.00001 in order to ensure filter stability.

void om::sound::filters::MultichannelDelay::setFeedbackGain ( Gain newFeedbackGain )

Set the feedback gain for all channels of this delay filter.

This value represents how much of each output delay sample is sent back to the delay buffer during each pass over the delay buffer. This value is clamped to be between -0.99999 and 0.99999 in order to ensure filter stability.

void om::sound::filters::MultichannelDelay::setFeedbackGainDB ( Gain newFeedbackGain )

inline

Set the feedback gain for all channels of this delay filter.

This value represents the gain applied to the output delay sample that is sent back to the delay buffer during each pass over the delay buffer. This value should be between -infinity and -0.00001 in order to ensure filter stability.

Float om::sound::filters::MultichannelDelay::getChannelPhase ( Index channelIndex ) const

inline

Return the delay phase offset of the channel with the specified index.

This value, specified in degrees, indicates how much the phase of the channel should be shifted by. This parameter allows the creation of ping-pong delay effects. For example, if the phase of the left channel is 0 and the phase of the right channel is 180, the channels' delay will be 50% out-of-phase, creating the classic ping-pong style delay.

void om::sound::filters::MultichannelDelay::setChannelPhase	(	Index	channelIndex,
		Float	newPhase
	)

Set the delay phase offset of the channel with the specified index.

This value, specified in degrees, indicates how much the phase of the channel should be shifted by. This parameter allows the creation of ping-pong delay effects. For example, if the phase of the left channel is 0 and the phase of the right channel is 180, the channels' delay will be 50% out-of-phase, creating the classic ping-pong style delay.

The input phase value is clamped so that the new phase value lies between -180 and 180 degrees.

void om::sound::filters::MultichannelDelay::setChannelPhase ( Float newPhase )

Set the delay phase offset for all channels.

Doing this brings all channels into phase with each other (regardless of what phase that is).

The input phase value is clamped so that the new phase value lies between -180 and 180 degrees.

Gain om::sound::filters::MultichannelDelay::getDelayGain ( ) const

inline

Return the linear delay gain of this multichannel delay filter.

This value represents the gain applied to the delayed signal before it is mixed with input signal.

Gain om::sound::filters::MultichannelDelay::getDelayGainDB ( ) const

inline

Return the delay gain of this multichannel delay filter in decibels.

This value represents the gain applied to the delayed signal before it is mixed with input signal.

void om::sound::filters::MultichannelDelay::setDelayGain ( Gain newDelayGain )

inline

Set the linear delay gain of this multichannel delay filter.

This value represents the gain applied to the delayed signal before it is mixed with input signal.

void om::sound::filters::MultichannelDelay::setDelayGainDB ( Gain newDelayGain )

inline

Set the delay gain of this multichannel delay filter in decibels.

This value represents the gain applied to the delayed signal before it is mixed with input signal.

Gain om::sound::filters::MultichannelDelay::getDryGain ( ) const

inline

Return the linear dry gain of this multichannel delay filter.

This value represents the gain applied to the input signal before it is mixed with delayed signal.

Gain om::sound::filters::MultichannelDelay::getDryGainDB ( ) const

inline

Return the dry gain of this multichannel delay filter in decibels.

This value represents the gain applied to the input signal before it is mixed with delayed signal.

void om::sound::filters::MultichannelDelay::setDryGain ( Gain newDryGain )

inline

Set the linear dry gain of this multichannel delay filter.

This value represents the gain applied to the input signal before it is mixed with delayed signal.

void om::sound::filters::MultichannelDelay::setDryGainDB ( Gain newDryGain )

inline

Set the dry gain of this multichannel delay filter in decibels.

This value represents the gain applied to the input signal before it is mixed with delayed signal.

virtual UTF8String om::sound::filters::MultichannelDelay::getName ( ) const

virtual

Return a human-readable name for this multichannel delay filter.

The method returns the string "Mutichannel Comb Filter".

Reimplemented from om::sound::filters::SoundFilter.

virtual UTF8String om::sound::filters::MultichannelDelay::getManufacturer ( ) const

virtual

Return the manufacturer name of this multichannel delay filter.

The method returns the string "Om Sound".

Reimplemented from om::sound::filters::SoundFilter.

virtual FilterVersion om::sound::filters::MultichannelDelay::getVersion ( ) const

virtual

Return an object representing the version of this multichannel delay filter.

Reimplemented from om::sound::filters::SoundFilter.

virtual FilterCategory om::sound::filters::MultichannelDelay::getCategory ( ) const

virtual

Return an object that describes the category of effect that this filter implements.

This method returns the value FilterCategory::DELAY.

Reimplemented from om::sound::filters::SoundFilter.

virtual Size om::sound::filters::MultichannelDelay::getParameterCount ( ) const

virtual

Return the total number of generic accessible parameters this multichannel delay filter has.

Reimplemented from om::sound::filters::SoundFilter.

virtual Bool om::sound::filters::MultichannelDelay::getParameterInfo	(	Index	parameterIndex,
		FilterParameterInfo &	info
	)		const

virtual

Get information about the multichannel delay filter parameter at the specified index.

Reimplemented from om::sound::filters::SoundFilter.

virtual Bool om::sound::filters::MultichannelDelay::getParameterValueName	(	Index	parameterIndex,
		const FilterParameter &	value,
		UTF8String &	name
	)		const

virtual

Get any special name associated with the specified value of an indexed parameter.

Reimplemented from om::sound::filters::SoundFilter.

Member Data Documentation

const UTF8String om::sound::filters::MultichannelDelay::NAME

static

A string indicating the human-readable name of this multichannel delay filter.

const UTF8String om::sound::filters::MultichannelDelay::MANUFACTURER

static

A string indicating the manufacturer name of this multichanel delay filter.

const FilterVersion om::sound::filters::MultichannelDelay::VERSION

static

An object indicating the version of this multichannel delay filter.

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

omSoundMultichannelDelay.h

Public Types

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation