An Effect class that handles a wide range of effects. ??Mac only?? More...

#include <AudioUnitEffectBase.h>

Inheritance diagram for AudioUnitEffectBase:

Collaboration diagram for AudioUnitEffectBase:

Public Types
using	Parameters = PackedArray::Ptr< const AudioUnitParameterID >

Public Types inherited from EffectPlugin
using	EffectSettingsAccessPtr = std::shared_ptr< EffectSettingsAccess >

using	InstancePointer = std::shared_ptr< EffectInstanceEx >

using	InstanceFinder = std::function< std::optional< InstancePointer >(EffectSettings &settings) >

Public Types inherited from EffectDefinitionInterface
enum class	RealtimeSince : unsigned { Never , After_3_1 , Always }
	In which versions of Audacity was an effect realtime capable? More...

Public Types inherited from AudioUnitWrapper
using	Parameters = PackedArray::Ptr< const AudioUnitParameterID >

using	ParameterVisitor = std::function< bool(const ParameterInfo &pi, AudioUnitParameterID ID) >
	Return value: if true, continue visiting. More...

Public Member Functions
	AudioUnitEffectBase (const PluginPath &path, const wxString &name, AudioComponent component, Parameters pParameters=nullptr, AudioUnitEffectBase master=nullptr)

	~AudioUnitEffectBase () override

PluginPath	GetPath () const override

ComponentInterfaceSymbol	GetSymbol () const override

VendorSymbol	GetVendor () const override

wxString	GetVersion () const override

TranslatableString	GetDescription () const override

EffectType	GetType () const override
	Type determines how it behaves. More...

EffectFamilySymbol	GetFamily () const override
	Report identifier and user-visible name of the effect protocol. More...

bool	IsInteractive () const override
	Whether the effect needs a dialog for entry of settings. More...

bool	IsDefault () const override
	Whether the effect sorts "above the line" in the menus. More...

RealtimeSince	RealtimeSupport () const override
	Since which version of Audacity has the effect supported realtime? More...

bool	SupportsAutomation () const override
	Whether the effect has any automatable controls. More...

EffectSettings	MakeSettings () const override

bool	CopySettingsContents (const EffectSettings &src, EffectSettings &dst) const override
	Update one settings object from another. More...

bool	SaveSettings (const EffectSettings &settings, CommandParameters &parms) const override
	Store settings as keys and values. More...

bool	LoadSettings (const CommandParameters &parms, EffectSettings &settings) const override
	May allocate memory, so should be called only in the main thread. More...

OptionalMessage	LoadUserPreset (const RegistryPath &name, EffectSettings &settings) const override

bool	SaveUserPreset (const RegistryPath &name, const EffectSettings &settings) const override
	Save settings in the configuration file as a user-named preset. More...

RegistryPaths	GetFactoryPresets () const override
	Report names of factory presets. More...

OptionalMessage	LoadFactoryPreset (int id, EffectSettings &settings) const override

bool	InitializePlugin ()

std::shared_ptr< EffectInstance >	MakeInstance () const override
	Make an object maintaining short-term state of an Effect. More...

bool	CanExportPresets () const override
	Whether the effect supports export of presets to files, and importing too. More...

bool	HasOptions () const override

TranslatableString	Export (const AudioUnitEffectSettings &settings, const wxString &path) const

TranslatableString	Import (AudioUnitEffectSettings &settings, const wxString &path) const

TranslatableString	SaveBlobToConfig (const RegistryPath &group, const wxString &path, const void *blob, size_t len, bool allowEmpty=true) const

void	GetChannelCounts ()

bool	MigrateOldConfigFile (const RegistryPath &group, EffectSettings &settings) const

OptionalMessage	LoadPreset (const RegistryPath &group, EffectSettings &settings) const

bool	SavePreset (const RegistryPath &group, const AudioUnitEffectSettings &settings) const

Public Member Functions inherited from PerTrackEffect
	~PerTrackEffect () override

Public Member Functions inherited from Effect
	Effect ()

virtual	~Effect ()

PluginPath	GetPath () const override

bool	VisitSettings (SettingsVisitor &visitor, EffectSettings &settings) override

bool	VisitSettings (ConstSettingsVisitor &visitor, const EffectSettings &settings) const override

ComponentInterfaceSymbol	GetSymbol () const override

VendorSymbol	GetVendor () const override

wxString	GetVersion () const override

TranslatableString	GetDescription () const override

EffectFamilySymbol	GetFamily () const override
	Report identifier and user-visible name of the effect protocol. More...

bool	IsInteractive () const override
	Whether the effect needs a dialog for entry of settings. More...

bool	IsDefault () const override
	Whether the effect sorts "above the line" in the menus. More...

RealtimeSince	RealtimeSupport () const override
	Since which version of Audacity has the effect supported realtime? More...

bool	SupportsAutomation () const override
	Whether the effect has any automatable controls. More...

bool	SaveSettings (const EffectSettings &settings, CommandParameters &parms) const override
	Store settings as keys and values. More...

bool	LoadSettings (const CommandParameters &parms, EffectSettings &settings) const override
	Restore settings from keys and values. More...

OptionalMessage	LoadUserPreset (const RegistryPath &name, EffectSettings &settings) const override

bool	SaveUserPreset (const RegistryPath &name, const EffectSettings &settings) const override
	Save settings in the configuration file as a user-named preset. More...

RegistryPaths	GetFactoryPresets () const override
	Report names of factory presets. More...

OptionalMessage	LoadFactoryPreset (int id, EffectSettings &settings) const override

OptionalMessage	LoadFactoryDefaults (EffectSettings &settings) const override

virtual const EffectParameterMethods &	Parameters () const

bool	CanExportPresets () const override
	Whether the effect supports export of presets to files, and importing too. More...

bool	HasOptions () const override

const EffectSettingsManager &	GetDefinition () const override

virtual NumericFormatID	GetSelectionFormat ()

bool	SaveSettingsAsString (const EffectSettings &settings, wxString &parms) const override

OptionalMessage	LoadSettingsFromString (const wxString &parms, EffectSettings &settings) const override

bool	IsBatchProcessing () const override

void	SetBatchProcessing () override

void	UnsetBatchProcessing () override

unsigned	TestUIFlags (unsigned mask)

bool	Delegate (Effect &delegate, EffectSettings &settings, InstanceFinder finder={})
	Re-invoke DoEffect on another Effect object that implements the work. More...

Public Member Functions inherited from EffectBase
	EffectBase ()

	~EffectBase () override

bool	IsLinearEffect () const

bool	PreviewsFullSelection () const

void	SetTracks (TrackList *pTracks)

double	GetDefaultDuration ()

virtual std::any	BeginPreview (const EffectSettings &settings)
	Called when Preview() starts, to allow temporary effect state changes. More...

bool	DoEffect (EffectSettings &settings, const InstanceFinder &finder, double projectRate, TrackList list, WaveTrackFactory factory, NotifyingSelectedRegion &selectedRegion, unsigned flags, const EffectSettingsAccessPtr &pAccess) override

virtual double	CalcPreviewInputLength (const EffectSettings &settings, double previewLength) const =0

void	CountWaveTracks ()

Public Member Functions inherited from EffectPlugin
EffectPlugin &	operator= (EffectPlugin &)=delete

virtual	~EffectPlugin ()

virtual bool	HasOptions () const =0

virtual bool	CanExportPresets () const =0
	Whether the effect supports export of presets to files, and importing too. More...

virtual const EffectSettingsManager &	GetDefinition () const =0

virtual bool	SaveSettingsAsString (const EffectSettings &settings, wxString &parms) const =0

virtual OptionalMessage	LoadSettingsFromString (const wxString &parms, EffectSettings &settings) const =0

virtual bool	IsBatchProcessing () const =0

virtual void	SetBatchProcessing ()=0

virtual void	UnsetBatchProcessing ()=0

virtual bool	DoEffect (EffectSettings &settings, const InstanceFinder &finder, double projectRate, TrackList list, WaveTrackFactory factory, NotifyingSelectedRegion &selectedRegion, unsigned flags, const EffectSettingsAccessPtr &pAccess=nullptr)=0

Public Member Functions inherited from EffectInstanceFactory
virtual	~EffectInstanceFactory ()

virtual std::shared_ptr< EffectInstance >	MakeInstance () const =0
	Make an object maintaining short-term state of an Effect. More...

Public Member Functions inherited from EffectSettingsManager
virtual	~EffectSettingsManager ()

virtual bool	VisitSettings (SettingsVisitor &visitor, EffectSettings &settings)

virtual bool	VisitSettings (ConstSettingsVisitor &visitor, const EffectSettings &settings) const

virtual std::unique_ptr< EffectOutputs >	MakeOutputs () const
	Produce an object to hold values to send to effect output meters. More...

Public Member Functions inherited from EffectDefinitionInterface
virtual	~EffectDefinitionInterface ()

virtual EffectType	GetType () const =0
	Type determines how it behaves. More...

virtual EffectType	GetClassification () const
	Determines which menu it appears in; default same as GetType(). More...

virtual EffectFamilySymbol	GetFamily () const =0
	Report identifier and user-visible name of the effect protocol. More...

virtual bool	IsInteractive () const =0
	Whether the effect needs a dialog for entry of settings. More...

virtual bool	IsDefault () const =0
	Whether the effect sorts "above the line" in the menus. More...

virtual RealtimeSince	RealtimeSupport () const =0
	Since which version of Audacity has the effect supported realtime? More...

bool	SupportsRealtime () const

virtual bool	SupportsAutomation () const =0
	Whether the effect has any automatable controls. More...

virtual bool	EnablesDebug () const
	Whether the effect dialog should have a Debug button; default, always false. More...

virtual ManualPageID	ManualPage () const
	Name of a page in the Audacity alpha manual, default is empty. More...

virtual FilePath	HelpPage () const
	Fully qualified local help file name, default is empty. More...

virtual bool	IsHiddenFromMenus () const
	Default is false. More...

Public Member Functions inherited from ComponentInterface
virtual	~ComponentInterface ()

virtual PluginPath	GetPath () const =0

virtual ComponentInterfaceSymbol	GetSymbol () const =0

virtual VendorSymbol	GetVendor () const =0

virtual wxString	GetVersion () const =0

virtual TranslatableString	GetDescription () const =0

TranslatableString	GetName () const

Public Member Functions inherited from AudioUnitWrapper
	AudioUnitWrapper (AudioComponent component, Parameters *pParameters)

template<typename T >
OSStatus	GetFixedSizeProperty (AudioUnitPropertyID inID, T &property, AudioUnitScope inScope=kAudioUnitScope_Global, AudioUnitElement inElement=0) const

template<typename T >
OSStatus	GetVariableSizeProperty (AudioUnitPropertyID inID, PackedArray::Ptr< T > &pObject, AudioUnitScope inScope=kAudioUnitScope_Global, AudioUnitElement inElement=0) const

template<typename T >
OSStatus	SetProperty (AudioUnitPropertyID inID, const T &property, AudioUnitScope inScope=kAudioUnitScope_Global, AudioUnitElement inElement=0) const

void	ForEachParameter (ParameterVisitor visitor) const

bool	LoadPreset (const EffectDefinitionInterface &effect, const RegistryPath &group, EffectSettings &settings) const

bool	LoadFactoryPreset (const EffectDefinitionInterface &effect, int id, EffectSettings *pSettings) const

std::pair< CF_ptr< CFDataRef >, TranslatableString >	MakeBlob (const EffectDefinitionInterface &effect, const AudioUnitEffectSettings &settings, const wxCFStringRef &cfname, bool binary) const
	Obtain dump of the setting state of an AudioUnit instance. More...

TranslatableString	InterpretBlob (AudioUnitEffectSettings &settings, const wxString &group, const wxMemoryBuffer &buf) const
	Interpret the dump made before by MakeBlob. More...

bool	FetchSettings (AudioUnitEffectSettings &settings, bool fetchValues, bool fetchPreset=false) const
	May allocate memory, so should be called only in the main thread. More...

bool	StoreSettings (const EffectDefinitionInterface &effect, const AudioUnitEffectSettings &settings) const

bool	CreateAudioUnit ()

AudioUnit	GetAudioUnit () const

AudioComponent	GetComponent () const

const Parameters &	GetParameters () const

bool	SetRateAndChannels (double sampleRate, const wxString &identifier)

Static Public Member Functions
static RegistryPath	ChoosePresetKey (const EffectSettings &settings)

static RegistryPath	FindPresetKey (const CommandParameters &parms)

Static Public Member Functions inherited from Effect
static Effect *	FetchParameters (Effect &e, EffectSettings &)

Static Public Member Functions inherited from EffectBase
static std::optional< InstancePointer >	FindInstance (EffectPlugin &plugin)

static InstanceFinder	DefaultInstanceFinder (EffectPlugin &plugin)

Static Public Member Functions inherited from EffectDefinitionInterface
static Identifier	GetSquashedName (const Identifier &ident)
	A utility that strips spaces and CamelCases a name. More...

Static Public Member Functions inherited from AudioUnitWrapper
static AudioUnitEffectSettings &	GetSettings (EffectSettings &settings)

static const AudioUnitEffectSettings &	GetSettings (const EffectSettings &settings)

static bool	MoveSettingsContents (AudioUnitEffectSettings &&src, AudioUnitEffectSettings &dst, bool merge)
	Copy, then clear the optionals in src. More...

Protected Attributes
const PluginPath	mPath

const wxString	mName

const wxString	mVendor

bool	mInteractive { false }

Protected Attributes inherited from PerTrackEffect
sampleCount	mSampleCnt {}

Protected Attributes inherited from EffectBase
double	mF0 {}

double	mF1 {}

wxArrayString	mPresetNames

unsigned	mUIFlags { 0 }

Protected Attributes inherited from AudioUnitWrapper
const AudioComponent	mComponent

AudioUnitCleanup< AudioUnit, AudioComponentInstanceDispose >	mUnit

Parameters	mOwnParameters

Parameters &	mParameters

unsigned	mAudioIns { 2 }

unsigned	mAudioOuts { 2 }

Additional Inherited Members
Public Attributes inherited from EffectBase
std::shared_ptr< TrackList >	mTracks {}

int	mNumTracks {}

BasicUI::ProgressDialog *	mProgress {}

double	mProjectRate {}

WaveTrackFactory *	mFactory {}

double	mT0 {}

double	mT1 {}

bool	mIsPreview { false }

Static Public Attributes inherited from EffectPlugin
static const wxString	kUserPresetIdent = wxT("User Preset:")

static const wxString	kFactoryPresetIdent = wxT("Factory Preset:")

static const wxString	kCurrentSettingsIdent = wxT("<Current Settings>")

static const wxString	kFactoryDefaultsIdent = wxT("<Factory Defaults>")

Protected Member Functions inherited from PerTrackEffect
bool	DoPass1 () const

bool	DoPass2 () const

bool	Process (EffectInstance &instance, EffectSettings &settings) const

std::shared_ptr< EffectOutputTracks >	MakeOutputTracks ()

void	DestroyOutputTracks () const

Protected Member Functions inherited from Effect
bool	CheckWhetherSkipEffect (const EffectSettings &settings) const override
	Default implementation returns false. More...

double	CalcPreviewInputLength (const EffectSettings &settings, double previewLength) const override
	Default implementation returns `previewLength` More...

bool	TotalProgress (double frac, const TranslatableString &={}) const

bool	TrackProgress (int whichTrack, double frac, const TranslatableString &={}) const

bool	TrackGroupProgress (int whichGroup, double frac, const TranslatableString &={}) const

int	GetNumWaveTracks () const

int	GetNumWaveGroups () const

void	GetBounds (const WaveTrack &track, sampleCount start, sampleCount len)

Protected Member Functions inherited from EffectBase
virtual bool	CheckWhetherSkipEffect (const EffectSettings &settings) const =0
	After Init(), tell whether Process() should be skipped. More...

void	SetLinearEffectFlag (bool linearEffectFlag)

void	SetPreviewFullSelectionFlag (bool previewDurationFlag)

bool	IsPreviewing () const

const TrackList *	inputTracks () const

const AudacityProject *	FindProject () const

Detailed Description

An Effect class that handles a wide range of effects. ??Mac only??

Definition at line 28 of file AudioUnitEffectBase.h.

Member Typedef Documentation

◆ Parameters

using AudioUnitEffectBase::Parameters = PackedArray::Ptr<const AudioUnitParameterID>

Definition at line 33 of file AudioUnitEffectBase.h.

Constructor & Destructor Documentation

◆ AudioUnitEffectBase()

AudioUnitEffectBase::AudioUnitEffectBase	(	const PluginPath &	path,
		const wxString &	name,
		AudioComponent	component,
		Parameters *	pParameters = `nullptr`,
		AudioUnitEffectBase *	master = `nullptr`
	)

Definition at line 70 of file AudioUnitEffectBase.cpp.

   : AudioUnitWrapper{ component, pParameters }
   , mPath{ path }
   , mName{ name.AfterFirst(wxT(':')).Trim(true).Trim(false) }
   , mVendor{ name.BeforeFirst(wxT(':')).Trim(true).Trim(false) }
{
}

◆ ~AudioUnitEffectBase()

AudioUnitEffectBase::~AudioUnitEffectBase ( )

overridedefault

Member Function Documentation

◆ CanExportPresets()

bool AudioUnitEffectBase::CanExportPresets ( ) const

overridevirtual

Whether the effect supports export of presets to files, and importing too.

Implements EffectPlugin.

Definition at line 373 of file AudioUnitEffectBase.cpp.

{
   return true;
}

◆ ChoosePresetKey()

RegistryPath AudioUnitEffectBase::ChoosePresetKey ( const EffectSettings & settings )

static

Definition at line 258 of file AudioUnitEffectBase.cpp.

{
   // Find a key to use for the preset that does not collide with any
   // parameter name
   wxString result = PresetStr;
 
   // That string probably works but be sure
   const auto &map = GetSettings(settings).values;
   using Pair = decltype(*map.begin());
   while (std::any_of(map.begin(), map.end(), [&](Pair &pair){
      return pair.second && pair.second->first == result;
   }))
      result += "_";
 
   return result;
}

References AudioUnitWrapper::GetSettings(), PresetStr, settings(), and AudioUnitEffectSettings::values.

Referenced by SaveSettings().

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◆ CopySettingsContents()

bool AudioUnitEffectBase::CopySettingsContents	(	const EffectSettings &	src,
		EffectSettings &	dst
	)		const

overridevirtual

Update one settings object from another.

This may run in a worker thread, and should avoid memory allocations. Therefore do not copy the underlying std::any, but copy the contents of the contained objects.

Assume that src and dst were created and previously modified only by this

Default implementation does nothing and returns true

Parameters

src	settings to copy from
dst	settings to copy into
copyDirection	direction in which copy is performed

Returns: success

Reimplemented from EffectSettingsManager.

Definition at line 249 of file AudioUnitEffectBase.cpp.

{
   // Not needed -- rely on EffectInstance::Message instead
   return true;
}

◆ Export()

TranslatableString AudioUnitEffectBase::Export	(	const AudioUnitEffectSettings &	settings,
		const wxString &	path
	)		const

Definition at line 436 of file AudioUnitEffectBase.cpp.

{
   // Create the file
   wxFFile f(path, wxT("wb"));
   if (!f.IsOpened())
      return XO("Couldn't open \"%s\"").Format(path);
 
   // First set the name of the preset
   wxCFStringRef cfname(wxFileName(path).GetName());
 
   const auto &[data, message] = MakeBlob(*this, settings, cfname, false);
   if (!data || !message.empty())
      return message;
 
   // Write XML data
   auto length = CFDataGetLength(data.get());
   if (f.Write(CFDataGetBytePtr(data.get()), length) != length || f.Error())
      return XO("Failed to write XML preset to \"%s\"").Format(path);
 
   f.Close();
   return {};
}

References ComponentInterface::GetName(), AudioUnitWrapper::MakeBlob(), settings(), wxT(), and XO().

Referenced by AudioUnitEffect::ExportPresets().

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◆ FindPresetKey()

RegistryPath AudioUnitEffectBase::FindPresetKey ( const CommandParameters & parms )

static

Definition at line 276 of file AudioUnitEffectBase.cpp.

{
   RegistryPath result;
   auto len = strlen(PresetStr);
   if (auto [index, key] = std::tuple(0L, wxString{})
       ; parms.GetFirstEntry(key, index)
   ) do {
      if (key.StartsWith(PresetStr)
          && key.Mid(len).find_first_not_of("_") == wxString::npos
          && key.length() > result.length())
         result = key;
   } while(parms.GetNextEntry(key, index));
   return result;
}

References key, Tuple::detail::npos(), and PresetStr.

Referenced by LoadSettings().

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◆ GetChannelCounts()

void AudioUnitEffectBase::GetChannelCounts ( )

Definition at line 482 of file AudioUnitEffectBase.cpp.

{
   // Does AU have channel info
   PackedArray::Ptr<AUChannelInfo> info;
   if (GetVariableSizeProperty(kAudioUnitProperty_SupportedNumChannels, info)) {
      // None supplied.  Apparently all FX type units can do any number of INs
      // and OUTs as long as they are the same number.  In this case, we'll
      // just say stereo.
      //
      // We should probably check to make sure we're dealing with an FX type.
      mAudioIns = 2;
      mAudioOuts = 2;
      return;
   }
 
   // This is where it gets weird...not sure what is the best
   // way to do this really.  If we knew how many ins/outs we
   // really needed, we could make a better choice.
 
   bool haven2m = false;   // nothing -> mono
   bool haven2s = false;   // nothing -> stereo
   bool havem2n = false;   // mono -> nothing
   bool haves2n = false;   // stereo -> nothing
   bool havem2m = false;   // mono -> mono
   bool haves2s = false;   // stereo -> stereo
   bool havem2s = false;   // mono -> stereo
   bool haves2m = false;   // stereo -> mono
 
   mAudioIns = 2;
   mAudioOuts = 2;
 
   // Look only for exact channel constraints
   for (auto &ci : info) {
      int ic = ci.inChannels;
      int oc = ci.outChannels;
 
      if (ic < 0 && oc >= 0)
         ic = 2;
      else if (ic >= 0 && oc < 0)
         oc = 2;
      else if (ic < 0 && oc < 0) {
         ic = 2;
         oc = 2;
      }
 
      if (ic == 2 && oc == 2)
         haves2s = true;
      else if (ic == 1 && oc == 1)
         havem2m = true;
      else if (ic == 1 && oc == 2)
         havem2s = true;
      else if (ic == 2 && oc == 1)
         haves2m = true;
      else if (ic == 0 && oc == 2)
         haven2s = true;
      else if (ic == 0 && oc == 1)
         haven2m = true;
      else if (ic == 1 && oc == 0)
         havem2n = true;
      else if (ic == 2 && oc == 0)
         haves2n = true;
   }
 
   if (haves2s) {
      mAudioIns = 2;
      mAudioOuts = 2;
   }
   else if (havem2m) {
      mAudioIns = 1;
      mAudioOuts = 1;
   }
   else if (havem2s) {
      mAudioIns = 1;
      mAudioOuts = 2;
   }
   else if (haves2m) {
      mAudioIns = 2;
      mAudioOuts = 1;
   }
   else if (haven2m) {
      mAudioIns = 0;
      mAudioOuts = 1;
   }
   else if (haven2s) {
      mAudioIns = 0;
      mAudioOuts = 2;
   }
   else if (haves2n) {
      mAudioIns = 2;
      mAudioOuts = 0;
   }
   else if (havem2n) {
      mAudioIns = 1;
      mAudioOuts = 0;
   }
 
   return;
}

References AudioUnitWrapper::GetVariableSizeProperty(), AudioUnitWrapper::mAudioIns, and AudioUnitWrapper::mAudioOuts.

Referenced by InitializePlugin().

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◆ GetDescription()

TranslatableString AudioUnitEffectBase::GetDescription ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 113 of file AudioUnitEffectBase.cpp.

{
   /* i18n-hint: Can mean "not available," "not applicable," "no answer" */
   return XO("n/a");
}

References XO().

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◆ GetFactoryPresets()

RegistryPaths AudioUnitEffectBase::GetFactoryPresets ( ) const

overridevirtual

Report names of factory presets.

Implements EffectSettingsManager.

Definition at line 359 of file AudioUnitEffectBase.cpp.

{
   RegistryPaths presets;
 
   // Retrieve the list of factory presets
   CF_ptr<CFArrayRef> array;
   if (!GetFixedSizeProperty(kAudioUnitProperty_FactoryPresets, array))
      for (CFIndex i = 0, cnt = CFArrayGetCount(array.get()); i < cnt; ++i)
         presets.push_back(wxCFStringRef::AsString(
            static_cast<const AUPreset*>(CFArrayGetValueAtIndex(array.get(), i))
               ->presetName));
   return presets;
}

References AudioUnitWrapper::GetFixedSizeProperty().

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◆ GetFamily()

EffectFamilySymbol AudioUnitEffectBase::GetFamily ( ) const

overridevirtual

Report identifier and user-visible name of the effect protocol.

Implements EffectDefinitionInterface.

Definition at line 143 of file AudioUnitEffectBase.cpp.

{
   return AUDIOUNITEFFECTS_FAMILY;
}

References AUDIOUNITEFFECTS_FAMILY.

◆ GetPath()

PluginPath AudioUnitEffectBase::GetPath ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 86 of file AudioUnitEffectBase.cpp.

{
   return mPath;
}

References mPath.

◆ GetSymbol()

ComponentInterfaceSymbol AudioUnitEffectBase::GetSymbol ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 91 of file AudioUnitEffectBase.cpp.

{
   return mName;
}

References mName.

Referenced by InitializePlugin(), and MakeInstance().

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◆ GetType()

EffectType AudioUnitEffectBase::GetType ( ) const

overridevirtual

Type determines how it behaves.

Implements EffectDefinitionInterface.

Definition at line 123 of file AudioUnitEffectBase.cpp.

{
   if (mAudioIns == 0 && mAudioOuts == 0)
   {
      return EffectTypeNone;
   }
 
   if (mAudioIns == 0)
   {
      return EffectTypeGenerate;
   }
 
   if (mAudioOuts == 0)
   {
      return EffectTypeAnalyze;
   }
 
   return EffectTypeProcess;
}

References EffectTypeAnalyze, EffectTypeGenerate, EffectTypeNone, EffectTypeProcess, AudioUnitWrapper::mAudioIns, and AudioUnitWrapper::mAudioOuts.

Referenced by RealtimeSupport(), and AudioUnitEffect::ShowClientInterface().

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◆ GetVendor()

VendorSymbol AudioUnitEffectBase::GetVendor ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 96 of file AudioUnitEffectBase.cpp.

{
   return { mVendor };
}

References mVendor.

◆ GetVersion()

wxString AudioUnitEffectBase::GetVersion ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 101 of file AudioUnitEffectBase.cpp.

{
   UInt32 version;
 
   OSStatus result = AudioComponentGetVersion(mComponent, &version);
 
   return wxString::Format(wxT("%d.%d.%d"),
                           (version >> 16) & 0xffff,
                           (version >> 8) & 0xff,
                           version & 0xff);
}

References AudioUnitWrapper::mComponent, and wxT().

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◆ HasOptions()

bool AudioUnitEffectBase::HasOptions ( ) const

overridevirtual

Whether there are preferences applying to the effect's family, for which a UI may be needed to change them

Implements EffectPlugin.

Definition at line 378 of file AudioUnitEffectBase.cpp.

{
   return true;
}

◆ Import()

TranslatableString AudioUnitEffectBase::Import	(	AudioUnitEffectSettings &	settings,
		const wxString &	path
	)		const

Definition at line 460 of file AudioUnitEffectBase.cpp.

{
   // Open the preset
   wxFFile f(path, wxT("r"));
   if (!f.IsOpened())
      return XO("Couldn't open \"%s\"").Format(path);
 
   // Load it into the buffer
   size_t len = f.Length();
   wxMemoryBuffer buf(len);
   if (f.Read(buf.GetData(), len) != len || f.Error())
      return XO("Unable to read the preset from \"%s\"").Format(path);
   buf.SetDataLen(len);
 
   const auto error = InterpretBlob(settings, path, buf);
   if (!error.empty())
      return error;
 
   return {};
}

References AudioUnitWrapper::InterpretBlob(), settings(), wxT(), and XO().

Referenced by AudioUnitEffect::ImportPresets().

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◆ InitializePlugin()

bool AudioUnitEffectBase::InitializePlugin ( )

Definition at line 188 of file AudioUnitEffectBase.cpp.

{
   // To implement the services of EffectPlugin -- such as, a query of the
   // set of effect parameters, so that we can implement MakeSettings -- we
   // also need what is called an AudioComponentInstance, also called an
   // AudioUnit.
   // It's not just for implementing EffectInstance.  AudioUnits is unlike other
   // third party effect families that distinguish the notions of plug-in and
   // instance.
 
   GetChannelCounts();
 
   if (!CreateAudioUnit())
      return false;
 
   // Use an arbitrary rate while completing the discovery of channel support
   if (!SetRateAndChannels(44100.0, GetSymbol().Internal()))
      return false;
 
   // Determine interactivity
   mInteractive = (Count(mParameters) > 0);
   if (!mInteractive) {
      // Check for a Cocoa UI
      // This could retrieve a variable-size property, but we only look at
      // the first element.
      AudioUnitCocoaViewInfo cocoaViewInfo;
      mInteractive =
         !GetFixedSizeProperty(kAudioUnitProperty_CocoaUI, cocoaViewInfo);
      if (!mInteractive) {
         // Check for a Carbon UI
         // This could retrieve a variable sized array but we only need the
         // first
         AudioComponentDescription compDesc;
         mInteractive = !GetFixedSizeProperty(
            kAudioUnitProperty_GetUIComponentList, compDesc);
      }
   }
 
   return true;
}

References PackedArray::Count(), AudioUnitWrapper::CreateAudioUnit(), GetChannelCounts(), AudioUnitWrapper::GetFixedSizeProperty(), GetSymbol(), Internal, mInteractive, AudioUnitWrapper::mParameters, and AudioUnitWrapper::SetRateAndChannels().

Referenced by AudioUnitEffectsModule::DiscoverPluginsAtPath().

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◆ IsDefault()

bool AudioUnitEffectBase::IsDefault ( ) const

overridevirtual

Whether the effect sorts "above the line" in the menus.

Implements EffectDefinitionInterface.

Definition at line 153 of file AudioUnitEffectBase.cpp.

{
   return false;
}

◆ IsInteractive()

bool AudioUnitEffectBase::IsInteractive ( ) const

overridevirtual

Whether the effect needs a dialog for entry of settings.

Implements EffectDefinitionInterface.

Definition at line 148 of file AudioUnitEffectBase.cpp.

{
   return mInteractive;
}

References mInteractive.

◆ LoadFactoryPreset()

OptionalMessage AudioUnitEffectBase::LoadFactoryPreset	(	int	id,
		EffectSettings &	settings
	)		const

overridevirtual

Change settings to the preset whose name is GetFactoryPresets()[id]

Returns: nullopt for failure

Implements EffectSettingsManager.

Definition at line 352 of file AudioUnitEffectBase.cpp.

{
   if (AudioUnitWrapper::LoadFactoryPreset(*this, id, &settings))
      return { nullptr };
   return {};
}

References AudioUnitWrapper::LoadFactoryPreset(), and settings().

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◆ LoadPreset()

OptionalMessage AudioUnitEffectBase::LoadPreset	(	const RegistryPath &	group,
		EffectSettings &	settings
	)		const

Definition at line 407 of file AudioUnitEffectBase.cpp.

{
   if (MigrateOldConfigFile(group, settings))
      return { nullptr };
 
   if (AudioUnitWrapper::LoadPreset(*this, group, settings))
      return { nullptr };
   return {};
}

References AudioUnitWrapper::LoadPreset(), MigrateOldConfigFile(), and settings().

Referenced by LoadUserPreset().

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◆ LoadSettings()

bool AudioUnitEffectBase::LoadSettings	(	const CommandParameters &	parms,
		EffectSettings &	settings
	)		const

overridevirtual

May allocate memory, so should be called only in the main thread.

Implements EffectSettingsManager.

Definition at line 309 of file AudioUnitEffectBase.cpp.

{
   // First clean all settings, in case any are not defined in parms
   auto &mySettings = GetSettings(settings);
   mySettings.ResetValues();
   auto &map = mySettings.values;
 
   // Reload preset first
   if (auto presetKey = FindPresetKey(parms); !presetKey.empty()) {
      SInt32 value = 0;
      if (parms.Read(presetKey, &value))
         AudioUnitWrapper::LoadFactoryPreset(*this, value, &settings);
   }
 
   // Load settings from CommandParameters
   // Iterate the config only, not using any AudioUnit handles
   if (auto [index, key, value] = std::tuple(
         0L, wxString{}, AudioUnitParameterValue{})
       ; parms.GetFirstEntry(key, index)
   ) do {
      if (auto pKey = ParameterInfo::ParseKey(key)
         ; pKey && parms.Read(key, &value)
      )
         map[*pKey].emplace(mySettings.Intern(key), value);
   } while(parms.GetNextEntry(key, index));
   return true;
}

References FindPresetKey(), AudioUnitWrapper::GetSettings(), key, AudioUnitWrapper::LoadFactoryPreset(), AudioUnitWrapper::ParameterInfo::ParseKey(), and settings().

Referenced by MigrateOldConfigFile().

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◆ LoadUserPreset()

OptionalMessage AudioUnitEffectBase::LoadUserPreset	(	const RegistryPath &	name,
		EffectSettings &	settings
	)		const

overridevirtual

Change settings to a user-named preset

Returns: nullopt for failure

Implements EffectSettingsManager.

Definition at line 338 of file AudioUnitEffectBase.cpp.

{
   // To do: externalize state so const_cast isn't needed
   return const_cast<AudioUnitEffectBase*>(this)->LoadPreset(name, settings);
}

References LoadPreset(), name, and settings().

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◆ MakeInstance()

std::shared_ptr< EffectInstance > AudioUnitEffectBase::MakeInstance ( ) const

overridevirtual

Make an object maintaining short-term state of an Effect.

One effect may have multiple instances extant simultaneously. Instances have state, may be implemented in foreign code, and are temporary, whereas EffectSettings represents persistent effect state that can be saved and reloaded from files.

Parameters

settings may be assumed to have a lifetime enclosing the instance's

Postcondition: true (no promises that the result isn't null)

Implements EffectInstanceFactory.

Definition at line 178 of file AudioUnitEffectBase.cpp.

{
   bool useLatency;
   GetConfig(*this, PluginSettings::Shared, OptionsKey, UseLatencyKey,
      useLatency, true);
 
   return std::make_shared<AudioUnitInstance>(*this, mComponent, mParameters,
      GetSymbol().Internal(), mAudioIns, mAudioOuts, useLatency);
}

References PluginSettings::GetConfig(), GetSymbol(), Internal, AudioUnitWrapper::mAudioIns, AudioUnitWrapper::mAudioOuts, AudioUnitWrapper::mComponent, AudioUnitWrapper::mParameters, OptionsKey, PluginSettings::Shared, and UseLatencyKey.

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◆ MakeSettings()

EffectSettings AudioUnitEffectBase::MakeSettings ( ) const

overridevirtual

Produce an object holding new, independent settings

Default implementation returns an empty any

Reimplemented from EffectSettingsManager.

Definition at line 242 of file AudioUnitEffectBase.cpp.

{
   AudioUnitEffectSettings settings;
   FetchSettings(settings, true);
   return EffectSettings::Make<AudioUnitEffectSettings>(std::move(settings));
}

References AudioUnitWrapper::FetchSettings(), and settings().

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◆ MigrateOldConfigFile()

bool AudioUnitEffectBase::MigrateOldConfigFile	(	const RegistryPath &	group,
		EffectSettings &	settings
	)		const

Definition at line 387 of file AudioUnitEffectBase.cpp.

{
   // Migration of very old format configuration file, should not normally
   // happen and perhaps this code can be abandoned
   // Attempt to load old preset parameters and resave using new method
   constexpr auto oldKey = L"Parameters";
   wxString parms;
   if (GetConfig(*this, PluginSettings::Private,
      group, oldKey, parms, wxEmptyString)) {
      CommandParameters eap;
      if (eap.SetParameters(parms))
         if (LoadSettings(eap, settings))
            if (SavePreset(group, GetSettings(settings)))
               RemoveConfig(*this, PluginSettings::Private, group, oldKey);
      return true;
   }
   return false;
}

References PluginSettings::GetConfig(), AudioUnitWrapper::GetSettings(), LoadSettings(), PluginSettings::Private, PluginSettings::RemoveConfig(), SavePreset(), CommandParameters::SetParameters(), and settings().

Referenced by LoadPreset().

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◆ RealtimeSupport()

auto AudioUnitEffectBase::RealtimeSupport ( ) const

overridevirtual

Since which version of Audacity has the effect supported realtime?

Implements EffectDefinitionInterface.

Definition at line 158 of file AudioUnitEffectBase.cpp.

{
   return GetType() == EffectTypeProcess
      ? RealtimeSince::After_3_1
      : RealtimeSince::Never;
}

References EffectDefinitionInterface::After_3_1, EffectTypeProcess, GetType(), and EffectDefinitionInterface::Never.

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◆ SaveBlobToConfig()

TranslatableString AudioUnitEffectBase::SaveBlobToConfig	(	const RegistryPath &	group,
		const wxString &	path,
		const void *	blob,
		size_t	len,
		bool	allowEmpty = `true`
	)		const

Parameters

path	only for formatting error messages

Returns: error message

Definition at line 49 of file AudioUnitEffectBase.cpp.

{
   // Base64 encode the returned binary property list
   auto parms = wxBase64Encode(blob, len);
   if (!allowEmpty && parms.IsEmpty())
      return XO("Failed to encode preset from \"%s\"").Format(path);
 
   // And write it to the config
   if (!SetConfig(*this, PluginSettings::Private, group, PRESET_KEY, parms))
      return XO("Unable to store preset in config file");
   return {};
}

References PRESET_KEY, PluginSettings::Private, PluginSettings::SetConfig(), and XO().

Referenced by SavePreset().

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◆ SavePreset()

bool AudioUnitEffectBase::SavePreset	(	const RegistryPath &	group,
		const AudioUnitEffectSettings &	settings
	)		const

Definition at line 418 of file AudioUnitEffectBase.cpp.

{
   wxCFStringRef cfname(wxFileNameFromPath(group));
   const auto &[data, _] = MakeBlob(*this, settings, cfname, true);
   if (!data)
      return false;
 
   // Nothing to do if we don't have any data
   if (const auto length = CFDataGetLength(data.get())) {
      auto error =
         SaveBlobToConfig(group, {}, CFDataGetBytePtr(data.get()), length);
      if (!error.empty())
         return false;
   }
   return true;
}

References _, AudioUnitWrapper::MakeBlob(), SaveBlobToConfig(), and settings().

Referenced by MigrateOldConfigFile(), and SaveUserPreset().

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◆ SaveSettings()

bool AudioUnitEffectBase::SaveSettings	(	const EffectSettings &	settings,
		CommandParameters &	parms
	)		const

overridevirtual

Store settings as keys and values.

The override may assume parms is initially empty

Returns: true on success

Implements EffectSettingsManager.

Definition at line 291 of file AudioUnitEffectBase.cpp.

{
   const auto &mySettings = GetSettings(settings);
   if (mySettings.mPresetNumber) {
      const auto key = ChoosePresetKey(settings);
      parms.Write(key, *mySettings.mPresetNumber);
   }
 
   // Save settings into CommandParameters
   // Iterate the map only, not using any AudioUnit handles
   for (auto &[ID, pPair] : mySettings.values)
      if (pPair)
         // Write names, not numbers, as keys in the config file
         parms.Write(pPair->first, pPair->second);
   return true;
}

References ChoosePresetKey(), AudioUnitWrapper::GetSettings(), key, and settings().

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◆ SaveUserPreset()

bool AudioUnitEffectBase::SaveUserPreset	(	const RegistryPath &	name,
		const EffectSettings &	settings
	)		const

overridevirtual

Save settings in the configuration file as a user-named preset.

Implements EffectSettingsManager.

Definition at line 345 of file AudioUnitEffectBase.cpp.

{
   return SavePreset(name, GetSettings(settings));
}

References AudioUnitWrapper::GetSettings(), name, SavePreset(), and settings().

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◆ SupportsAutomation()

bool AudioUnitEffectBase::SupportsAutomation ( ) const

overridevirtual

Whether the effect has any automatable controls.

Implements EffectDefinitionInterface.

Definition at line 165 of file AudioUnitEffectBase.cpp.

{
   bool supports = false;
   ForEachParameter(
   [&supports](const ParameterInfo &pi, AudioUnitParameterID) {
      if (pi.mInfo.flags & kAudioUnitParameterFlag_IsWritable)
         supports = true;
      // Search only until we find one, that's all we need to know
      return !supports;
   });
   return supports;
}

References AudioUnitWrapper::ForEachParameter(), and MIR::anonymous_namespace{MirUtils.cpp}::pi.

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Member Data Documentation

◆ mInteractive

bool AudioUnitEffectBase::mInteractive { false }

protected

Definition at line 120 of file AudioUnitEffectBase.h.

Referenced by InitializePlugin(), and IsInteractive().

◆ mName

const wxString AudioUnitEffectBase::mName

protected

Definition at line 117 of file AudioUnitEffectBase.h.

Referenced by AudioUnitEffect::ExportPresets(), GetSymbol(), and AudioUnitEffect::ImportPresets().

◆ mPath

const PluginPath AudioUnitEffectBase::mPath

protected

Definition at line 116 of file AudioUnitEffectBase.h.

Referenced by GetPath().

◆ mVendor

const wxString AudioUnitEffectBase::mVendor

protected

Definition at line 118 of file AudioUnitEffectBase.h.

Referenced by AudioUnitEffect::ExportPresets(), GetVendor(), and AudioUnitEffect::ImportPresets().

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

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Parameters

Constructor & Destructor Documentation

◆ AudioUnitEffectBase()

◆ ~AudioUnitEffectBase()

Member Function Documentation

◆ CanExportPresets()

◆ ChoosePresetKey()

◆ CopySettingsContents()

◆ Export()

◆ FindPresetKey()

◆ GetChannelCounts()

◆ GetDescription()

◆ GetFactoryPresets()

◆ GetFamily()

◆ GetPath()

◆ GetSymbol()

◆ GetType()

◆ GetVendor()

◆ GetVersion()

◆ HasOptions()

◆ Import()

◆ InitializePlugin()

◆ IsDefault()

◆ IsInteractive()

◆ LoadFactoryPreset()

◆ LoadPreset()

◆ LoadSettings()

◆ LoadUserPreset()

◆ MakeInstance()

◆ MakeSettings()

◆ MigrateOldConfigFile()

◆ RealtimeSupport()

◆ SaveBlobToConfig()

◆ SavePreset()

◆ SaveSettings()

◆ SaveUserPreset()

◆ SupportsAutomation()

Member Data Documentation

◆ mInteractive

◆ mName

◆ mPath

◆ mVendor