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AAX SDK
2.4.1
Avid Audio Extensions Development Kit
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#include <AAX_IACFEffectParameters.h>
The interface for an AAX Plug-in's data model.
This is the interface for an instance of a plug-in's data model that gets exposed to the host application. The AAX host interacts with your plug-in's data model via this interface, which includes methods that store and update of your plug-in's internal data. See Data model interface.
Public Member Functions | |
Initialization and uninitialization | |
virtual AAX_Result | Initialize (IACFUnknown *iController)=0 |
Main data model initialization. Called when plug-in instance is first instantiated. More... | |
virtual AAX_Result | Uninitialize ()=0 |
Main data model uninitialization. More... | |
AAX host and plug-in event notification | |
virtual AAX_Result | NotificationReceived (AAX_CTypeID inNotificationType, const void *inNotificationData, uint32_t inNotificationDataSize)=0 |
Notification Hook. More... | |
Parameter information | |
These methods are used by the AAX host to retrieve information about the plug-in's data model.
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virtual AAX_Result | GetNumberOfParameters (int32_t *oNumControls) const =0 |
CALL: Retrieves the total number of plug-in parameters. More... | |
virtual AAX_Result | GetMasterBypassParameter (AAX_IString *oIDString) const =0 |
CALL: Retrieves the ID of the plug-in's Master Bypass parameter. More... | |
virtual AAX_Result | GetParameterIsAutomatable (AAX_CParamID iParameterID, AAX_CBoolean *oAutomatable) const =0 |
CALL: Retrieves information about a parameter's automatable status. More... | |
virtual AAX_Result | GetParameterNumberOfSteps (AAX_CParamID iParameterID, int32_t *oNumSteps) const =0 |
CALL: Retrieves the number of discrete steps for a parameter. More... | |
virtual AAX_Result | GetParameterName (AAX_CParamID iParameterID, AAX_IString *oName) const =0 |
CALL: Retrieves the full name for a parameter. More... | |
virtual AAX_Result | GetParameterNameOfLength (AAX_CParamID iParameterID, AAX_IString *oName, int32_t iNameLength) const =0 |
CALL: Retrieves an abbreviated name for a parameter. More... | |
virtual AAX_Result | GetParameterDefaultNormalizedValue (AAX_CParamID iParameterID, double *oValue) const =0 |
CALL: Retrieves default value of a parameter. More... | |
virtual AAX_Result | SetParameterDefaultNormalizedValue (AAX_CParamID iParameterID, double iValue)=0 |
CALL: Sets the default value of a parameter. More... | |
virtual AAX_Result | GetParameterType (AAX_CParamID iParameterID, AAX_EParameterType *oParameterType) const =0 |
CALL: Retrieves the type of a parameter. More... | |
virtual AAX_Result | GetParameterOrientation (AAX_CParamID iParameterID, AAX_EParameterOrientation *oParameterOrientation) const =0 |
CALL: Retrieves the orientation that should be applied to a parameter's controls. More... | |
virtual AAX_Result | GetParameter (AAX_CParamID iParameterID, AAX_IParameter **oParameter)=0 |
CALL: Retrieves an arbitrary setting within a parameter. More... | |
virtual AAX_Result | GetParameterIndex (AAX_CParamID iParameterID, int32_t *oControlIndex) const =0 |
CALL: Retrieves the index of a parameter. More... | |
virtual AAX_Result | GetParameterIDFromIndex (int32_t iControlIndex, AAX_IString *oParameterIDString) const =0 |
CALL: Retrieves the ID of a parameter. More... | |
virtual AAX_Result | GetParameterValueInfo (AAX_CParamID iParameterID, int32_t iSelector, int32_t *oValue) const =0 |
CALL: Retrieves a property of a parameter. More... | |
Parameter setters and getters | |
These methods are used by the AAX host and by the plug-in's UI to retrieve and modify the values of the plug-in's parameters.
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virtual AAX_Result | GetParameterValueFromString (AAX_CParamID iParameterID, double *oValue, const AAX_IString &iValueString) const =0 |
CALL: Converts a value string to a value. More... | |
virtual AAX_Result | GetParameterStringFromValue (AAX_CParamID iParameterID, double iValue, AAX_IString *oValueString, int32_t iMaxLength) const =0 |
CALL: Converts a normalized parameter value into a string representing its corresponding real value. More... | |
virtual AAX_Result | GetParameterValueString (AAX_CParamID iParameterID, AAX_IString *oValueString, int32_t iMaxLength) const =0 |
CALL: Retrieves the value string associated with a parameter's current value. More... | |
virtual AAX_Result | GetParameterNormalizedValue (AAX_CParamID iParameterID, double *oValuePtr) const =0 |
CALL: Retrieves a parameter's current value. More... | |
virtual AAX_Result | SetParameterNormalizedValue (AAX_CParamID iParameterID, double iValue)=0 |
CALL: Sets the specified parameter to a new value. More... | |
virtual AAX_Result | SetParameterNormalizedRelative (AAX_CParamID iParameterID, double iValue)=0 |
CALL: Sets the specified parameter to a new value relative to its current value. More... | |
Automated parameter helpers | |
These methods are used to lock and unlock automation system 'resources' when updating automatable parameters.
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virtual AAX_Result | TouchParameter (AAX_CParamID iParameterID)=0 |
"Touches" (locks) a parameter in the automation system to a particular control in preparation for updates More... | |
virtual AAX_Result | ReleaseParameter (AAX_CParamID iParameterID)=0 |
Releases a parameter from a "touched" state. More... | |
virtual AAX_Result | UpdateParameterTouch (AAX_CParamID iParameterID, AAX_CBoolean iTouchState)=0 |
Sets a "touched" state on a parameter. More... | |
Asynchronous parameter update methods | |
These methods are called by the AAX host when parameter values have been updated. They are called by the host and can be triggered by other plug-in modules via calls to AAX_IParameter's These methods are responsible for updating parameter values. Do not call these methods directly! To ensure proper synchronization and to avoid problematic dependency chains, other methods (e.g. SetParameterNormalizedValue()) and components (e.g. AAX_IEffectGUI) should always call a | |
virtual AAX_Result | UpdateParameterNormalizedValue (AAX_CParamID iParameterID, double iValue, AAX_EUpdateSource iSource)=0 |
Updates a single parameter's state to its current value. More... | |
virtual AAX_Result | UpdateParameterNormalizedRelative (AAX_CParamID iParameterID, double iValue)=0 |
Updates a single parameter's state to its current value, as a difference with the parameter's previous value. More... | |
virtual AAX_Result | GenerateCoefficients ()=0 |
Generates and dispatches new coefficient packets. More... | |
State reset handlers | |
virtual AAX_Result | ResetFieldData (AAX_CFieldIndex inFieldIndex, void *oData, uint32_t inDataSize) const =0 |
Called by the host to reset a private data field in the plug-in's algorithm. More... | |
Chunk methods | |
These methods are used to save and restore collections of plug-in state information, known as chunks. Chunks are used by the host when saving or restoring presets and session settings and when providing "compare" functionality for plug-ins. The default implementation of these methods in AAX_CEffectParameters supports a single chunk that includes state information for all of the plug-in's registered parameters. Override all of these methods to add support for additional chunks in your plug-in, for example if your plug-in contains any persistent state that is not encapsulated by its set of registered parameters.
For reference, see also: | |
virtual AAX_Result | GetNumberOfChunks (int32_t *oNumChunks) const =0 |
Retrieves the number of chunks used by this plug-in. More... | |
virtual AAX_Result | GetChunkIDFromIndex (int32_t iIndex, AAX_CTypeID *oChunkID) const =0 |
Retrieves the ID associated with a chunk index. More... | |
virtual AAX_Result | GetChunkSize (AAX_CTypeID iChunkID, uint32_t *oSize) const =0 |
Get the size of the data structure that can hold all of a chunk's information. More... | |
virtual AAX_Result | GetChunk (AAX_CTypeID iChunkID, AAX_SPlugInChunk *oChunk) const =0 |
Fills a block of data with chunk information representing the plug-in's current state. More... | |
virtual AAX_Result | SetChunk (AAX_CTypeID iChunkID, const AAX_SPlugInChunk *iChunk)=0 |
Restores a set of plug-in parameters based on chunk information. More... | |
virtual AAX_Result | CompareActiveChunk (const AAX_SPlugInChunk *iChunkP, AAX_CBoolean *oIsEqual) const =0 |
Determine if a chunk represents settings that are equivalent to the plug-in's current state. More... | |
virtual AAX_Result | GetNumberOfChanges (int32_t *oNumChanges) const =0 |
Retrieves the number of parameter changes made since the plug-in's creation. More... | |
Thread methods | |
virtual AAX_Result | TimerWakeup ()=0 |
Periodic wakeup callback for idle-time operations. More... | |
Auxiliary UI methods | |
virtual AAX_Result | GetCurveData (AAX_CTypeID iCurveType, const float *iValues, uint32_t iNumValues, float *oValues) const =0 |
Generate a set of output values based on a set of given input values. More... | |
Custom data methods | |
These functions exist as a proxiable way to move data between different modules (e.g. AAX_IEffectParameters and AAX_IEffectGUI.) Using these, the GUI can query any data through GetCustomData() with a plug-in defined
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virtual AAX_Result | GetCustomData (AAX_CTypeID iDataBlockID, uint32_t inDataSize, void *oData, uint32_t *oDataWritten) const =0 |
An optional interface hook for getting custom data from another module. More... | |
virtual AAX_Result | SetCustomData (AAX_CTypeID iDataBlockID, uint32_t inDataSize, const void *iData)=0 |
An optional interface hook for setting custom data for use by another module. More... | |
MIDI methods | |
virtual AAX_Result | DoMIDITransfers ()=0 |
MIDI update callback. More... | |
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virtual BEGIN_ACFINTERFACE ACFRESULT ACFMETHODCALLTYPE | QueryInterface (const acfIID &iid, void **ppOut)=0 |
Returns pointers to supported interfaces. More... | |
virtual acfUInt32 ACFMETHODCALLTYPE | AddRef (void)=0 |
Increments reference count. More... | |
virtual acfUInt32 ACFMETHODCALLTYPE | Release (void)=0 |
Decrements reference count. More... | |
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pure virtual |
Main data model initialization. Called when plug-in instance is first instantiated.
[in] | iController | A versioned reference that resolves to an AAX_IController interface |
Implemented in AAX_CEffectParameters.
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pure virtual |
Main data model uninitialization.
Implemented in AAX_CEffectParameters.
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pure virtual |
Notification Hook.
Called from the host to deliver notifications to this object.
Look at the AAX_ENotificationEvent enumeration to see a description of events you can listen for and the data they come with.
NotificationReceived()
methods.NotificationReceived()
method (e.g. the GUI).[in] | inNotificationType | Type of notification being received. Notifications form the host are one of AAX_ENotificationEvent |
[in] | inNotificationData | Block of incoming notification data |
[in] | inNotificationDataSize | Size of inNotificationData , in bytes |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the total number of plug-in parameters.
[out] | oNumControls | The number of parameters in the plug-in's Parameter Manager |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the ID of the plug-in's Master Bypass parameter.
This is required if you want our master bypass functionality in the host to hook up to your bypass parameters.
[out] | oIDString | The ID of the plug-in's Master Bypass control |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves information about a parameter's automatable status.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oAutomatable | True if the queried parameter is automatable, false if it is not |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the number of discrete steps for a parameter.
oNumSteps
MUST be greater than zero. All other values will be considered an error by the host.[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oNumSteps | The number of steps for this parameter |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the full name for a parameter.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oName | Reference to an AAX_IString owned by the host. The plug-in must set this string equal to the parameter's full name. |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves an abbreviated name for a parameter.
In general, lengths of 3 through 8 and 31 should be specifically addressed.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oName | Reference to an AAX_IString owned by the host. The plug-in must set this string equal to an abbreviated name for the parameter, using iNameLength characters or fewer. |
[in] | iNameLength | The maximum number of characters in oName |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves default value of a parameter.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oValue | The parameter's default value |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Sets the default value of a parameter.
[in] | iParameterID | The ID of the parameter that is being updated |
[out] | iValue | The parameter's new default value |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the type of a parameter.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oParameterType | The parameter's type |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the orientation that should be applied to a parameter's controls.
This method allows you to specify the orientation of knob controls that are managed by the host (e.g. knobs on an attached control surface.)
Here is an example override of this method that reverses the orientation of a control for a parameter:
The orientation options are set according to AAX_EParameterOrientationBits
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oParameterOrientation | The orientation of the parameter |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves an arbitrary setting within a parameter.
This is a convenience function for accessing the richer parameter interface from the plug-in's other modules.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oParameter | A pointer to the returned parameter |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the index of a parameter.
Although parameters are normally referenced by their AAX_CParamID, each parameter is also associated with a unique numeric index.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oControlIndex | The parameter's numeric index |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the ID of a parameter.
This method can be used to convert a parameter's unique numeric index to its AAX_CParamID
[in] | iControlIndex | The numeric index of the parameter that is being queried |
[out] | oParameterIDString | Reference to an AAX_IString owned by the host. The plug-in must set this string equal to the parameter's ID. |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves a property of a parameter.
This is a general purpose query that is specialized based on the value of iSelector
. The currently supported selector values are described by AAX_EParameterValueInfoSelector . The meaning of oValue
is dependent upon iSelector
.
[in] | iParameterID | The ID of the parameter that is being queried |
[in] | iSelector | The selector of the parameter value to retrieve. See AAX_EParameterValueInfoSelector |
[out] | oValue | The value of the specified parameter |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Converts a value string to a value.
This method uses the queried parameter's display delegate and taper to convert a char*
string into its corresponding value. The formatting of valueString must be supported by the parameter's display delegate in order for this call to succeed.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oValue | The value associated with valueString |
[in] | iValueString | The formatted value string that will be converted into a value |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Converts a normalized parameter value into a string representing its corresponding real value.
This method uses the queried parameter's display delegate and taper to convert a normalized value into the corresponding char*
value string for its real value.
[in] | iParameterID | The ID of the parameter that is being queried |
[in] | iValue | The normalized value that will be converted to a formatted valueString |
[out] | oValueString | The formatted value string associated with value |
[in] | iMaxLength | The maximum length of valueString |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves the value string associated with a parameter's current value.
This method uses the queried parameter's display delegate and taper to convert its current value into a corresponding char*
value string.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oValueString | The formatted value string associated with the parameter's current value |
[in] | iMaxLength | The maximum length of valueString |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Retrieves a parameter's current value.
[in] | iParameterID | The ID of the parameter that is being queried |
[out] | oValuePtr | The parameter's current value |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Sets the specified parameter to a new value.
SetParameterNormalizedValue() is responsible for initiating any process that is required in order to update all of the parameter's controls (e.g. in the plug-in's GUI, on control surfaces, in automation lanes, etc.) In most cases, the parameter manager will handle this initiation step.
[in] | iParameterID | The ID of the parameter that is being set |
[in] | iValue | The value to which the parameter should be set |
Implemented in AAX_CEffectParameters.
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pure virtual |
CALL: Sets the specified parameter to a new value relative to its current value.
This method is used in cases when a relative control value is more convenient, for example when updating a GUI control using a mouse wheel or the arrow keys. Note that the host may apply the parameter's step size prior to calling SetParameterNormalizedRelative() in order to determine the correct value for aValue.
SetParameterNormalizedRelative() can be used to incorporate "wrapping" behavior in a parameter's controls, if desired. If this behavior is not desired, then this method must properly account for overflow of the parameter's normalized value.
SetParameterNormalizedRelative() is responsible for initiating any process that is required in order to update all of the parameter's controls (e.g. in the plug-in's GUI, on control surfaces, in automation lanes, etc.) In most cases, the parameter manager will handle this initiation step.
See also UpdateParameterNormalizedRelative().
[in] | iParameterID | The ID of the parameter that is being queried |
[in] | iValue | The change in value that should be applied to the parameter |
Implemented in AAX_CEffectParameters.
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pure virtual |
"Touches" (locks) a parameter in the automation system to a particular control in preparation for updates
This method is called by the Parameter Manager to prime a parameter for receiving new automation data. When an automatable parameter is touched by a control, it will reject input from other controls until it is released.
[in] | iParameterID | The parameter that is being touched |
Implemented in AAX_CEffectParameters.
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pure virtual |
Releases a parameter from a "touched" state.
This method is called by the Parameter Manager to release a parameter so that any control may send updates to the parameter.
[in] | iParameterID | The parameter that is being released |
Implemented in AAX_CEffectParameters.
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pure virtual |
Sets a "touched" state on a parameter.
[in] | iParameterID | The parameter that is changing touch states. |
[in] | iTouchState | The touch state of the parameter. |
Implemented in AAX_CEffectParameters.
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pure virtual |
Updates a single parameter's state to its current value.
[in] | iParameterID | The ID of the parameter that is being updated |
[in] | iValue | The parameter's current value, to which its internal state must be updated |
[in] | iSource | The source of the update |
Implemented in AAX_CMonolithicParameters, and AAX_CEffectParameters.
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pure virtual |
Updates a single parameter's state to its current value, as a difference with the parameter's previous value.
UpdateParameterNormalizedRelative() can be used to incorporate "wraparound" behavior in a parameter's controls, if desired. If this behavior is not desired, then this method must properly account for overflow of the parameter's normalized value.
[in] | iParameterID | The ID of the parameter that is being updated |
[in] | iValue | The difference between the parameter's current value and its previous value (normalized). The parameter's state must be updated to reflect this difference. |
Implemented in AAX_CEffectParameters.
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pure virtual |
Generates and dispatches new coefficient packets.
This method is responsible for updating the coefficient packets associated with all parameters whose states have changed since the last call to GenerateCoefficients(). The host may call this method once for every parameter update, or it may "batch" parameter updates such that changes for several parameters are all handled by a single call to GenerateCoefficients().
For more information on tracking parameters' statuses using the AAX_CPacketDispatcher, helper class, see AAX_CPacketDispatcher::SetDirty().
Implemented in AAX_CEffectParameters, and AAX_CMonolithicParameters.
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pure virtual |
Called by the host to reset a private data field in the plug-in's algorithm.
This method is called sequentially for all private data fields on Effect initialization and during any "reset" event, such as priming for a non-real-time render. This method is called before the algorithm's optional initialization callback, and the initialized private data will be available within that callback via its context block.
[in] | inFieldIndex | The index of the field that is being initialized |
[out] | oData | The pre-allocated block of data that should be initialized |
[in] | inDataSize | The size of the data block, in bytes |
Implemented in AAX_CEffectParameters, and AAX_CMonolithicParameters.
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pure virtual |
Retrieves the number of chunks used by this plug-in.
[out] | oNumChunks | The number of distinct chunks used by this plug-in |
Implemented in AAX_CEffectParameters.
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pure virtual |
Retrieves the ID associated with a chunk index.
[in] | iIndex | Index of the queried chunk |
[out] | oChunkID | ID of the queried chunk |
Implemented in AAX_CEffectParameters.
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pure virtual |
Get the size of the data structure that can hold all of a chunk's information.
If chunkID is one of the plug-in's custom chunks, initialize *size to the size of the chunk's data in bytes.
This method is invoked every time a chunk is saved, therefore it is possible to have dynamically sized chunks. However, note that each call to GetChunkSize() will correspond to a following call to GetChunk(). The chunk provided in GetChunk() must have the same size as the size provided by GetChunkSize().
[in] | iChunkID | ID of the queried chunk |
[out] | oSize | The chunk's size in bytes |
Implemented in AAX_CEffectParameters.
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pure virtual |
Fills a block of data with chunk information representing the plug-in's current state.
By calling this method, the host is requesting information about the current state of the plug-in. The following chunk fields should be explicitly populated in this method. Other fields will be populated by the host.
[in] | iChunkID | ID of the chunk that should be provided |
[out] | oChunk | A preallocated block of memory that should be populated with the chunk's data. |
Implemented in AAX_CEffectParameters.
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pure virtual |
Restores a set of plug-in parameters based on chunk information.
By calling this method, the host is attempting to update the plug-in's current state to match the data stored in a chunk. The plug-in should initialize itself to this new state by calling SetParameterNormalizedValue() for each of the relevant parameters.
[in] | iChunkID | ID of the chunk that is being set |
[in] | iChunk | The chunk |
Implemented in AAX_CEffectParameters.
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pure virtual |
Determine if a chunk represents settings that are equivalent to the plug-in's current state.
aChunkP
then the plug-in's Compare Light will be illuminated in the plug-in header, allowing users to toggle between the plug-in's custom state and its saved state.[in] | iChunkP | The chunk that is to be tested |
[out] | oIsEqual | True if the chunk represents equivalent settings when compared with the plug-in's current state. False if the chunk represents non-equivalent settings |
Implemented in AAX_CEffectParameters.
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pure virtual |
Retrieves the number of parameter changes made since the plug-in's creation.
This method is polled regularly by the host, and can additionally be triggered by some events such as mouse clicks. When the number provided by this method changes, the host subsequently calls CompareActiveChunk() to determine if the plug-in's Compare light should be activated.
The value provided by this method should increment with each call to UpdateParameterNormalizedValue()
[out] | oNumChanges | Must be set to indicate the number of parameter changes that have occurred since plug-in initialization. |
Implemented in AAX_CEffectParameters.
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pure virtual |
Periodic wakeup callback for idle-time operations.
This method is called from the host using a non-main thread. In general, it should be driven at approximately one call per 30 ms. However, the wakeup is not guaranteed to be called at any regular interval - for example, it could be held off by a high real-time processing load - and there is no host contract regarding maximum latency between wakeup calls.
This wakeup thread runs continuously and cannot be armed/disarmed or by the plug-in.
Implemented in AAX_CEffectParameters, and AAX_CMonolithicParameters.
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pure virtual |
An optional interface hook for getting custom data from another module.
[in] | iDataBlockID | Identifier for the requested block of custom data |
[in] | inDataSize | Size of provided buffer, in bytes |
[out] | oData | Pointer to an allocated buffer. Data will be written here. |
[out] | oDataWritten | The number of bytes actually written |
Implemented in AAX_CEffectParameters.
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pure virtual |
An optional interface hook for setting custom data for use by another module.
[in] | iDataBlockID | Identifier for the provided block of custom data |
[in] | inDataSize | Size of provided buffer, in bytes |
[in] | iData | Pointer to the data buffer |
Implemented in AAX_CEffectParameters.
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pure virtual |
MIDI update callback.
Call AAX_IController::GetNextMIDIPacket() from within this method to retrieve and process MIDI packets directly within the Effect's data model. MIDI data will also be delivered to the Effect algorithm.
This method is called regularly by the host, similarly to AAX_IEffectParameters::TimerWakeup()
Implemented in AAX_CEffectParameters.