An Effect that makes a sound louder or softer. More...

#include <Amplify.h>

Inheritance diagram for EffectAmplify:

Collaboration diagram for EffectAmplify:

Classes
struct	Instance

Public Member Functions
	EffectAmplify ()

virtual	~EffectAmplify ()

ComponentInterfaceSymbol	GetSymbol () const override

TranslatableString	GetDescription () const override

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

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

OptionalMessage	LoadFactoryDefaults (EffectSettings &settings) const override

OptionalMessage	DoLoadFactoryDefaults (EffectSettings &settings)

unsigned	GetAudioInCount () const override
	How many input buffers to allocate at once. More...

unsigned	GetAudioOutCount () const override
	How many output buffers to allocate at once. More...

size_t	ProcessBlock (EffectSettings &settings, const float const inBlock, float const outBlock, size_t blockLen) override
	Called for destructive effect computation. More...

bool	Init () override

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

std::unique_ptr< EffectEditor >	PopulateOrExchange (ShuttleGui &S, EffectInstance &instance, EffectSettingsAccess &access, const EffectOutputs *pOutputs) override
	Add controls to effect panel; always succeeds. More...

bool	TransferDataToWindow (const EffectSettings &settings) override

bool	TransferDataFromWindow (EffectSettings &settings) override

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

Public Member Functions inherited from StatefulPerTrackEffect
	~StatefulPerTrackEffect () override

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

size_t	SetBlockSize (size_t maxBlockSize) override

size_t	GetBlockSize () const override

bool	ProcessInitialize (EffectSettings &settings, double sampleRate, ChannelNames chanMap=nullptr) override

bool	ProcessFinalize () noexcept override

virtual size_t	ProcessBlock (EffectSettings &settings, const float const inBlock, float const outBlock, size_t blockLen)=0
	Called for destructive effect computation. More...

Public Member Functions inherited from StatefulEffectBase
virtual bool	Init ()

virtual bool	Process (EffectInstance &instance, EffectSettings &settings)=0

virtual bool	RealtimeInitialize (EffectSettings &settings, double sampleRate)

virtual bool	RealtimeAddProcessor (EffectSettings &settings, EffectOutputs *pOutputs, unsigned numChannels, float sampleRate)

virtual bool	RealtimeSuspend ()

virtual bool	RealtimeResume ()

virtual bool	RealtimeProcessStart (MessagePackage &package)
	settings are possibly changed, since last call, by an asynchronous dialog More...

virtual size_t	RealtimeProcess (size_t group, EffectSettings &settings, const float const inBuf, float const outBuf, size_t numSamples)

virtual bool	RealtimeProcessEnd (EffectSettings &settings) noexcept
	settings can be updated to let a dialog change appearance at idle More...

virtual bool	RealtimeFinalize (EffectSettings &settings) noexcept

virtual size_t	SetBlockSize (size_t maxBlockSize)

virtual size_t	GetBlockSize () const

virtual unsigned	GetAudioInCount () const
	How many input buffers to allocate at once. More...

virtual unsigned	GetAudioOutCount () const
	How many output buffers to allocate at once. More...

virtual sampleCount	GetLatency () const

virtual bool	NeedsDither () const

virtual bool	ProcessInitialize (EffectSettings &settings, double sampleRate, ChannelNames chanMap=nullptr)

virtual bool	ProcessFinalize () noexcept

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)

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 EffectSettings	MakeSettings () const

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

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 StatefulEffectUIServices
	~StatefulEffectUIServices () override

std::unique_ptr< EffectEditor >	PopulateUI (const EffectPlugin &plugin, ShuttleGui &S, EffectInstance &instance, EffectSettingsAccess &access, const EffectOutputs *pOutputs) const override
	Allows PopulateOrExchange to return null. More...

virtual std::unique_ptr< EffectEditor >	PopulateOrExchange (ShuttleGui &S, EffectInstance &instance, EffectSettingsAccess &access, const EffectOutputs *pOutputs)
	Add controls to effect panel; always succeeds. More...

virtual bool	TransferDataToWindow (const EffectSettings &settings)

virtual bool	TransferDataFromWindow (EffectSettings &settings)

Public Member Functions inherited from BasicEffectUIServices
int	ShowClientInterface (const EffectPlugin &plugin, wxWindow &parent, wxDialog &dialog, EffectEditor *pEditor, bool forceModal) const override

void	ExportPresets (const EffectPlugin &plugin, const EffectSettings &settings) const override

OptionalMessage	ImportPresets (const EffectPlugin &plugin, EffectSettings &settings) const override

void	ShowOptions (const EffectPlugin &plugin) const override

bool	ValidateUI (const EffectPlugin &context, EffectSettings &) const override

bool	CloseUI () const override

Public Member Functions inherited from EffectUIServices
virtual	~EffectUIServices ()

virtual int	ShowHostInterface (EffectBase &plugin, wxWindow &parent, const EffectDialogFactory &factory, std::shared_ptr< EffectInstance > &pInstance, EffectSettingsAccess &access, bool forceModal=false)

virtual int	ShowClientInterface (const EffectPlugin &plugin, wxWindow &parent, wxDialog &dialog, EffectEditor *pEditor, bool forceModal=false) const =0

virtual std::unique_ptr< EffectEditor >	PopulateUI (const EffectPlugin &plugin, ShuttleGui &S, EffectInstance &instance, EffectSettingsAccess &access, const EffectOutputs *pOutputs) const =0
	Adds controls to a panel that is given as the parent window of `S` More...

virtual void	ExportPresets (const EffectPlugin &plugin, const EffectSettings &settings) const =0

virtual OptionalMessage	ImportPresets (const EffectPlugin &plugin, EffectSettings &settings) const =0

virtual void	ShowOptions (const EffectPlugin &plugin) const =0

virtual bool	ValidateUI (const EffectPlugin &context, EffectSettings &settings) const =0

virtual bool	CloseUI () const =0

Static Public Member Functions
static EffectAmplify *	FetchParameters (EffectAmplify &e, EffectSettings &)

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 EffectUIServices
static int	DoMessageBox (const EffectPlugin &plugin, const TranslatableString &message, long style=DefaultMessageBoxStyle, const TranslatableString &titleStr={})

Static Public Attributes
static const ComponentInterfaceSymbol	Symbol { XO("Amplify") }

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>")

Private Member Functions
void	ClampRatio ()

void	OnAmpText (wxCommandEvent &evt)

void	OnPeakText (wxCommandEvent &evt)

void	OnAmpSlider (wxCommandEvent &evt)

void	OnClipCheckBox (wxCommandEvent &evt)

void	CheckClip ()

const EffectParameterMethods &	Parameters () const override

Private Attributes
wxWeakRef< wxWindow >	mUIParent {}

double	mPeak = 1.0

double	mRatio = 1.0

double	mRatioClip = 1.0

double	mAmp = 0.0

double	mNewPeak = 1.0

bool	mCanClip = true

wxSlider *	mAmpS

wxTextCtrl *	mAmpT

wxTextCtrl *	mNewPeakT

wxCheckBox *	mClip

Static Private Attributes
static constexpr EffectParameter	Ratio

static constexpr EffectParameter	Amp

static constexpr EffectParameter	Clipping

Additional Inherited Members
Public Types inherited from StatefulEffectBase
using	MessagePackage = EffectInstance::MessagePackage

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 EffectUIServices
enum	: long { DefaultMessageBoxStyle = wxOK \| wxCENTRE }

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 }

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

Protected Attributes inherited from PerTrackEffect
sampleCount	mSampleCnt {}

Protected Attributes inherited from EffectBase
wxArrayString	mPresetNames

unsigned	mUIFlags { 0 }

Detailed Description

An Effect that makes a sound louder or softer.

This rewritten class supports a smart Amplify effect - it calculates the maximum amount of gain that can be applied to all tracks without causing clipping and selects this as the default parameter.

Definition at line 27 of file Amplify.h.

Constructor & Destructor Documentation

◆ EffectAmplify()

EffectAmplify::EffectAmplify ( )

Definition at line 100 of file Amplify.cpp.

{
   mAmp = Amp.def;
   // Ratio.def == DB_TO_LINEAR(Amp.def)
   Parameters().Reset(*this);
   mRatioClip = 0.0;
   mPeak = 0.0;
 
   SetLinearEffectFlag(true);
}

References Amp, EffectParameter< Structure, Member, Type, Value >::def, mAmp, mPeak, mRatioClip, Parameters(), EffectParameterMethods::Reset(), and EffectBase::SetLinearEffectFlag().

Referenced by Parameters().

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◆ ~EffectAmplify()

EffectAmplify::~EffectAmplify ( )

virtual

Definition at line 111 of file Amplify.cpp.

112{

113}

Member Function Documentation

◆ BeginPreview()

std::any EffectAmplify::BeginPreview ( const EffectSettings & settings )

overridevirtual

Called when Preview() starts, to allow temporary effect state changes.

default returns a null

Returns: will undo its effects in its destructor before Preview() finishes

Reimplemented from EffectBase.

Definition at line 210 of file Amplify.cpp.

{
   return { std::pair{
      CopyableValueRestorer(mRatio), CopyableValueRestorer(mPeak)
   } };
}

References mPeak, and mRatio.

◆ CheckClip()

void EffectAmplify::CheckClip ( )

private

Definition at line 358 of file Amplify.cpp.

{
   EffectEditor::EnableApply(mUIParent,
      mClip->GetValue() || (mPeak > 0.0 && mRatio <= mRatioClip));
}

References EffectEditor::EnableApply(), mClip, mPeak, mRatio, mRatioClip, and mUIParent.

Referenced by OnAmpSlider(), OnAmpText(), OnClipCheckBox(), OnPeakText(), and TransferDataToWindow().

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◆ ClampRatio()

void EffectAmplify::ClampRatio ( )

private

Definition at line 301 of file Amplify.cpp.

{
   // limit range of gain
   double dBInit = LINEAR_TO_DB(mRatio);
   double dB = std::clamp<double>(dBInit, Amp.min, Amp.max);
   if (dB != dBInit)
      mRatio = DB_TO_LINEAR(dB);
 
   mAmp = LINEAR_TO_DB(mRatio);
   mNewPeak = LINEAR_TO_DB(mRatio * mPeak);
}

References Amp, DB_TO_LINEAR, LINEAR_TO_DB, mAmp, EffectParameter< Structure, Member, Type, Value >::max, EffectParameter< Structure, Member, Type, Value >::min, mNewPeak, mPeak, and mRatio.

Referenced by DoLoadFactoryDefaults(), PopulateOrExchange(), and TransferDataFromWindow().

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◆ DoLoadFactoryDefaults()

OptionalMessage EffectAmplify::DoLoadFactoryDefaults ( EffectSettings & settings )

Definition at line 168 of file Amplify.cpp.

{
   Init();
 
   mRatioClip = 0.0;
   if (mPeak > 0.0)
   {
      mRatio = 1.0 / mPeak;
      mRatioClip = mRatio;
   }
   else
   {
      mRatio = 1.0;
   }
   mCanClip = false;
 
   ClampRatio();
   return { nullptr };
}

References ClampRatio(), Init(), mCanClip, mPeak, mRatio, and mRatioClip.

Referenced by LoadFactoryDefaults().

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◆ FetchParameters()

static EffectAmplify * EffectAmplify::FetchParameters	(	EffectAmplify &	e,
		EffectSettings &
	)

inlinestatic

Definition at line 31 of file Amplify.h.

31{ return &e; }

◆ GetAudioInCount()

unsigned EffectAmplify::GetAudioInCount ( ) const

overridevirtual

How many input buffers to allocate at once.

If the instance processes channels independently, this can return 1 The result is not necessarily well defined before RealtimeInitialize Default implementation returns 0

Reimplemented from StatefulEffectBase.

Definition at line 140 of file Amplify.cpp.

{
   return 1;
}

◆ GetAudioOutCount()

unsigned EffectAmplify::GetAudioOutCount ( ) const

overridevirtual

How many output buffers to allocate at once.

The result is not necessarily well defined before RealtimeInitialize Default implementation returns 0

Reimplemented from StatefulEffectBase.

Definition at line 145 of file Amplify.cpp.

{
   return 1;
}

◆ GetDescription()

TranslatableString EffectAmplify::GetDescription ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 122 of file Amplify.cpp.

{
   // Note: This is useful only after ratio has been set.
   return XO("Increases or decreases the volume of the audio you have selected");
}

References XO().

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◆ GetSymbol()

ComponentInterfaceSymbol EffectAmplify::GetSymbol ( ) const

overridevirtual

Implements ComponentInterface.

Definition at line 117 of file Amplify.cpp.

{
   return Symbol;
}

References Symbol.

◆ GetType()

EffectType EffectAmplify::GetType ( ) const

overridevirtual

Type determines how it behaves.

Implements EffectDefinitionInterface.

Definition at line 135 of file Amplify.cpp.

{
   return EffectTypeProcess;
}

References EffectTypeProcess.

◆ Init()

bool EffectAmplify::Init ( )

overridevirtual

Default implementation does nothing, returns true

Reimplemented from StatefulEffectBase.

Definition at line 190 of file Amplify.cpp.

{
   auto range = inputTracks()->Selected<const WaveTrack>();
   bool hasStretch = any_of(begin(range), end(range),
      [this](auto *pTrack){
         return WaveTrackUtilities::HasStretch(*pTrack, mT0, mT1); });
   if (hasStretch)
      range = MakeOutputTracks()->Get().Selected<const WaveTrack>();
   mPeak = 0.0;
   for (auto t : range) {
      for (const auto pChannel : t->Channels()) {
         auto pair = pChannel->GetMinMax(mT0, mT1); // may throw
         const float min = pair.first, max = pair.second;
         const float newpeak = std::max(fabs(min), fabs(max));
         mPeak = std::max<double>(mPeak, newpeak);
      }
   }
   return true;
}

References PackedArray::begin(), PackedArray::end(), WaveTrackUtilities::HasStretch(), EffectBase::inputTracks(), PerTrackEffect::MakeOutputTracks(), min(), mPeak, EffectBase::mT0, EffectBase::mT1, and TrackList::Selected().

Referenced by DoLoadFactoryDefaults().

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◆ LoadFactoryDefaults()

OptionalMessage EffectAmplify::LoadFactoryDefaults ( EffectSettings & settings ) const

overridevirtual

Change settings back to "factory default"

Returns: nullopt for failure

Implements EffectSettingsManager.

Definition at line 162 of file Amplify.cpp.

{
   // To do: externalize state so const_cast isn't needed
   return const_cast<EffectAmplify&>(*this).DoLoadFactoryDefaults(settings);
}

References DoLoadFactoryDefaults(), and settings().

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◆ MakeInstance()

std::shared_ptr< EffectInstance > EffectAmplify::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 349 of file Amplify.cpp.

{
   // Cheat with const_cast to return an object that calls through to
   // non-const methods of a stateful effect.
   return std::make_shared<Instance>(const_cast<EffectAmplify&>(*this));
}

◆ ManualPage()

ManualPageID EffectAmplify::ManualPage ( ) const

overridevirtual

Name of a page in the Audacity alpha manual, default is empty.

Reimplemented from EffectDefinitionInterface.

Definition at line 128 of file Amplify.cpp.

{
   return L"Amplify";
}

◆ OnAmpSlider()

void EffectAmplify::OnAmpSlider ( wxCommandEvent & evt )

private

Definition at line 407 of file Amplify.cpp.

{
   double dB = evt.GetInt() / Amp.scale;
   mRatio = DB_TO_LINEAR(std::clamp<double>(dB, Amp.min, Amp.max));
 
   double dB2 = (evt.GetInt() - 1) / Amp.scale;
   double ratio2 = DB_TO_LINEAR(std::clamp<double>(dB2, Amp.min, Amp.max));
 
   if (!mClip->GetValue() && mRatio * mPeak > 1.0 && ratio2 * mPeak < 1.0)
   {
      mRatio = 1.0 / mPeak;
   }
 
   mAmp = LINEAR_TO_DB(mRatio);
   mAmpT->GetValidator()->TransferToWindow();
 
   mNewPeak = LINEAR_TO_DB(mRatio * mPeak);
   mNewPeakT->GetValidator()->TransferToWindow();
 
   CheckClip();
}

References Amp, CheckClip(), DB_TO_LINEAR, LINEAR_TO_DB, mAmp, mAmpT, EffectParameter< Structure, Member, Type, Value >::max, mClip, EffectParameter< Structure, Member, Type, Value >::min, mNewPeak, mNewPeakT, mPeak, mRatio, and EffectParameter< Structure, Member, Type, Value >::scale.

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◆ OnAmpText()

void EffectAmplify::OnAmpText ( wxCommandEvent & evt )

private

Definition at line 364 of file Amplify.cpp.

{
   if (!mAmpT->GetValidator()->TransferFromWindow())
   {
      EffectEditor::EnableApply(mUIParent, false);
      return;
   }
 
   mRatio = DB_TO_LINEAR(std::clamp<double>(mAmp * Amp.scale, Amp.min * Amp.scale, Amp.max * Amp.scale) / Amp.scale);
 
   mAmpS->SetValue((int) (LINEAR_TO_DB(mRatio) * Amp.scale + 0.5));
 
   mNewPeak = LINEAR_TO_DB(mRatio * mPeak);
   mNewPeakT->GetValidator()->TransferToWindow();
 
   CheckClip();
}

References Amp, CheckClip(), DB_TO_LINEAR, EffectEditor::EnableApply(), LINEAR_TO_DB, mAmp, mAmpS, mAmpT, EffectParameter< Structure, Member, Type, Value >::max, EffectParameter< Structure, Member, Type, Value >::min, mNewPeak, mNewPeakT, mPeak, mRatio, mUIParent, and EffectParameter< Structure, Member, Type, Value >::scale.

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◆ OnClipCheckBox()

void EffectAmplify::OnClipCheckBox ( wxCommandEvent & evt )

private

Definition at line 429 of file Amplify.cpp.

{
   CheckClip();
}

References CheckClip().

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◆ OnPeakText()

void EffectAmplify::OnPeakText ( wxCommandEvent & evt )

private

Definition at line 382 of file Amplify.cpp.

{
   if (!mNewPeakT->GetValidator()->TransferFromWindow())
   {
      EffectEditor::EnableApply(mUIParent, false);
      return;
   }
 
   if (mNewPeak == 0.0)
      mRatio = mRatioClip;
   else
      mRatio = DB_TO_LINEAR(mNewPeak) / mPeak;
 
   double ampInit = LINEAR_TO_DB(mRatio);
   mAmp = std::clamp<double>(ampInit, Amp.min, Amp.max);
   if (mAmp != ampInit)
      mRatio = DB_TO_LINEAR(mAmp);
 
   mAmpT->GetValidator()->TransferToWindow();
 
   mAmpS->SetValue((int) (mAmp * Amp.scale + 0.5f));
 
   CheckClip();
}

References Amp, CheckClip(), DB_TO_LINEAR, EffectEditor::EnableApply(), LINEAR_TO_DB, mAmp, mAmpS, mAmpT, EffectParameter< Structure, Member, Type, Value >::max, EffectParameter< Structure, Member, Type, Value >::min, mNewPeak, mNewPeakT, mPeak, mRatio, mRatioClip, mUIParent, and EffectParameter< Structure, Member, Type, Value >::scale.

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◆ Parameters()

const EffectParameterMethods & EffectAmplify::Parameters ( ) const

overrideprivatevirtual

Reimplemented from Effect.

Definition at line 52 of file Amplify.cpp.

{
   static CapturedParameters<EffectAmplify,
      // Interactive case
      Ratio, Clipping
   > parameters;
 
   static CapturedParameters<EffectAmplify,
      Ratio
   > batchParameters{
      // If invoking Amplify from a macro, mCanClip is not a parameter
      // but is always true
      [](EffectAmplify &, EffectSettings &, EffectAmplify &e, bool) {
         e.mCanClip = true;
         return true;
      },
   };
 
   // Parameters differ depending on batch mode.  Option to disable clipping
   // is interactive only.
   if (IsBatchProcessing())
      return batchParameters;
   else
      return parameters;
}

References Clipping, EffectAmplify(), Effect::IsBatchProcessing(), and Ratio.

Referenced by EffectAmplify().

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◆ PopulateOrExchange()

std::unique_ptr< EffectEditor > EffectAmplify::PopulateOrExchange	(	ShuttleGui &	S,
		EffectInstance &	instance,
		EffectSettingsAccess &	access,
		const EffectOutputs *	pOutputs
	)

overridevirtual

Add controls to effect panel; always succeeds.

Returns: if not null, then return it from PopulateUI instead of a DefaultEffectEditor; default implementation returns null

Reimplemented from StatefulEffectUIServices.

Definition at line 217 of file Amplify.cpp.

{
   mUIParent = S.GetParent();
 
   enum{ precision = 3 }; // allow (a generous) 3 decimal  places for Amplification (dB)
 
   bool batch = IsBatchProcessing();
   if ( batch )
   {
      mCanClip = true;
      mPeak = 1.0;
   }
   else 
   {
      if (mPeak > 0.0)
      {
         mRatio = 1.0 / mPeak;
         mRatioClip = mRatio;
      }
      else
      {
         mRatio = 1.0;
      }
   }
 
   // At this point mNewPeak is still uninitialized; this will initialize it
   ClampRatio();
 
   S.AddSpace(0, 5);
 
   S.StartVerticalLay(0);
   {
      // Amplitude
      S.StartMultiColumn(2, wxCENTER);
      {
         mAmpT = S.Id(ID_Amp)
            .Validator<FloatingPointValidator<double>>(
               precision, &mAmp, NumValidatorStyle::ONE_TRAILING_ZERO, Amp.min, Amp.max )
            .AddTextBox(XXO("&Amplification (dB):"), L"", 12);
      }
      S.EndMultiColumn();
 
      // Amplitude
      S.StartHorizontalLay(wxEXPAND);
      {
         mAmpS = S.Id(ID_Amp)
            .Style(wxSL_HORIZONTAL)
            .Name(XO("Amplification dB"))
            .AddSlider( {}, 0, Amp.max * Amp.scale, Amp.min * Amp.scale);
      }
      S.EndHorizontalLay();
 
      // Peak
      S.StartMultiColumn(2, wxCENTER);
      {
         mNewPeakT = S.Id(ID_Peak)
            .Validator<FloatingPointValidator<double>>(
               // One extra decimal place so that rounding is visible to user
               // (see: bug 958)
               precision + 1,
               &mNewPeak, NumValidatorStyle::ONE_TRAILING_ZERO,
               // min and max need same precision as what we're validating (bug 963)
               RoundValue( precision + 1, Amp.min + LINEAR_TO_DB(mPeak) ),
               RoundValue( precision + 1, Amp.max + LINEAR_TO_DB(mPeak) ) )
            .AddTextBox(XXO("&New Peak Amplitude (dB):"), L"", 12);
      }
      S.EndMultiColumn();
 
      // Clipping
      S.StartHorizontalLay(wxCENTER);
      {
 
         mClip = S.Id(ID_Clip).Disable( batch )
            .AddCheckBox(XXO("Allo&w clipping"), false);
      }
      S.EndHorizontalLay();
   }
   S.EndVerticalLay();
 
   return nullptr;
}

References Amp, ClampRatio(), ID_Amp, ID_Clip, ID_Peak, Effect::IsBatchProcessing(), LINEAR_TO_DB, mAmp, mAmpS, mAmpT, EffectParameter< Structure, Member, Type, Value >::max, mCanClip, mClip, EffectParameter< Structure, Member, Type, Value >::min, mNewPeak, mNewPeakT, mPeak, mRatio, mRatioClip, mUIParent, S, EffectParameter< Structure, Member, Type, Value >::scale, XO(), and XXO().

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◆ ProcessBlock()

size_t EffectAmplify::ProcessBlock	(	EffectSettings &	settings,
		const float const	inBlock,
		float const	outBlock,
		size_t	blockLen
	)

overridevirtual

Called for destructive effect computation.

Implements StatefulPerTrackEffect.

Definition at line 150 of file Amplify.cpp.

{
   for (decltype(blockLen) i = 0; i < blockLen; i++)
   {
      outBlock[0][i] = inBlock[0][i] * mRatio;
   }
 
   return blockLen;
}

References mRatio.

◆ TransferDataFromWindow()

bool EffectAmplify::TransferDataFromWindow ( EffectSettings & settings )

overridevirtual

Update the given settings from controls; default does nothing, returns true

Reimplemented from StatefulEffectUIServices.

Definition at line 328 of file Amplify.cpp.

{
   if (!mUIParent->Validate() || !mUIParent->TransferDataFromWindow())
   {
      return false;
   }
 
   mRatio = DB_TO_LINEAR(std::clamp<double>(mAmp * Amp.scale, Amp.min * Amp.scale, Amp.max * Amp.scale) / Amp.scale);
 
   mCanClip = mClip->GetValue();
 
   if (!mCanClip && mRatio * mPeak > 1.0)
   {
      mRatio = 1.0 / mPeak;
   }
 
   ClampRatio();
 
   return true;
}

References Amp, ClampRatio(), DB_TO_LINEAR, mAmp, EffectParameter< Structure, Member, Type, Value >::max, mCanClip, mClip, EffectParameter< Structure, Member, Type, Value >::min, mPeak, mRatio, mUIParent, and EffectParameter< Structure, Member, Type, Value >::scale.

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◆ TransferDataToWindow()

bool EffectAmplify::TransferDataToWindow ( const EffectSettings & settings )

overridevirtual

Update controls for the settings; default does nothing, returns true

Reimplemented from StatefulEffectUIServices.

Definition at line 313 of file Amplify.cpp.

{
   mAmpT->GetValidator()->TransferToWindow();
 
   mAmpS->SetValue((int) (mAmp * Amp.scale + 0.5f));
 
   mNewPeakT->GetValidator()->TransferToWindow();
 
   mClip->SetValue(mCanClip);
 
   CheckClip();
 
   return true;
}

References Amp, CheckClip(), mAmp, mAmpS, mAmpT, mCanClip, mClip, mNewPeakT, and EffectParameter< Structure, Member, Type, Value >::scale.

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Member Data Documentation

◆ Amp

constexpr EffectParameter EffectAmplify::Amp

staticconstexprprivate

Initial value:

{ &EffectAmplify::mAmp,

L"", -0.91515f, -50.0f, 50.0f, 10.0f }

Definition at line 107 of file Amplify.h.

Referenced by ClampRatio(), EffectAmplify(), OnAmpSlider(), OnAmpText(), OnPeakText(), PopulateOrExchange(), TransferDataFromWindow(), and TransferDataToWindow().

◆ Clipping

constexpr EffectParameter EffectAmplify::Clipping

staticconstexprprivate

Initial value:

{ &EffectAmplify::mCanClip,

L"AllowClipping", false, false, true, 1 }

Definition at line 109 of file Amplify.h.

Referenced by Parameters().

◆ mAmp

double EffectAmplify::mAmp = 0.0

private

Definition at line 91 of file Amplify.h.

Referenced by ClampRatio(), EffectAmplify(), OnAmpSlider(), OnAmpText(), OnPeakText(), PopulateOrExchange(), TransferDataFromWindow(), and TransferDataToWindow().

◆ mAmpS

wxSlider* EffectAmplify::mAmpS

private

Definition at line 95 of file Amplify.h.

Referenced by OnAmpText(), OnPeakText(), PopulateOrExchange(), and TransferDataToWindow().

◆ mAmpT

wxTextCtrl* EffectAmplify::mAmpT

private

Definition at line 96 of file Amplify.h.

Referenced by OnAmpSlider(), OnAmpText(), OnPeakText(), PopulateOrExchange(), and TransferDataToWindow().

◆ mCanClip

bool EffectAmplify::mCanClip = true

private

Definition at line 93 of file Amplify.h.

Referenced by DoLoadFactoryDefaults(), PopulateOrExchange(), TransferDataFromWindow(), and TransferDataToWindow().

◆ mClip

wxCheckBox* EffectAmplify::mClip

private

Definition at line 98 of file Amplify.h.

Referenced by CheckClip(), OnAmpSlider(), PopulateOrExchange(), TransferDataFromWindow(), and TransferDataToWindow().

◆ mNewPeak

double EffectAmplify::mNewPeak = 1.0

private

Definition at line 92 of file Amplify.h.

Referenced by ClampRatio(), OnAmpSlider(), OnAmpText(), OnPeakText(), and PopulateOrExchange().

◆ mNewPeakT

wxTextCtrl* EffectAmplify::mNewPeakT

private

Definition at line 97 of file Amplify.h.

Referenced by OnAmpSlider(), OnAmpText(), OnPeakText(), PopulateOrExchange(), and TransferDataToWindow().

◆ mPeak

double EffectAmplify::mPeak = 1.0

private

Definition at line 87 of file Amplify.h.

Referenced by BeginPreview(), CheckClip(), ClampRatio(), DoLoadFactoryDefaults(), EffectAmplify(), Init(), OnAmpSlider(), OnAmpText(), OnPeakText(), PopulateOrExchange(), and TransferDataFromWindow().

◆ mRatio

double EffectAmplify::mRatio = 1.0

private

Definition at line 89 of file Amplify.h.

Referenced by BeginPreview(), CheckClip(), ClampRatio(), DoLoadFactoryDefaults(), OnAmpSlider(), OnAmpText(), OnPeakText(), PopulateOrExchange(), ProcessBlock(), and TransferDataFromWindow().

◆ mRatioClip

double EffectAmplify::mRatioClip = 1.0

private

Definition at line 90 of file Amplify.h.

Referenced by CheckClip(), DoLoadFactoryDefaults(), EffectAmplify(), OnPeakText(), and PopulateOrExchange().

◆ mUIParent

wxWeakRef<wxWindow> EffectAmplify::mUIParent {}

private

Definition at line 85 of file Amplify.h.

Referenced by CheckClip(), OnAmpText(), OnPeakText(), PopulateOrExchange(), and TransferDataFromWindow().

◆ Ratio

constexpr EffectParameter EffectAmplify::Ratio

staticconstexprprivate

Initial value:

{ &EffectAmplify::mRatio,

L"Ratio", 0.9f, 0.003162f, 316.227766f, 1.0f }

Definition at line 104 of file Amplify.h.

Referenced by Parameters().

◆ Symbol

const ComponentInterfaceSymbol EffectAmplify::Symbol { XO("Amplify") }

static

Definition at line 32 of file Amplify.h.

Referenced by GetSymbol().

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

Classes

Public Member Functions

Static Public Member Functions

Static Public Attributes

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ EffectAmplify()

◆ ~EffectAmplify()

Member Function Documentation

◆ BeginPreview()

◆ CheckClip()

◆ ClampRatio()

◆ DoLoadFactoryDefaults()

◆ FetchParameters()

◆ GetAudioInCount()

◆ GetAudioOutCount()

◆ GetDescription()

◆ GetSymbol()

◆ GetType()

◆ Init()

◆ LoadFactoryDefaults()

◆ MakeInstance()

◆ ManualPage()

◆ OnAmpSlider()

◆ OnAmpText()

◆ OnClipCheckBox()

◆ OnPeakText()

◆ Parameters()

◆ PopulateOrExchange()

◆ ProcessBlock()

◆ TransferDataFromWindow()

◆ TransferDataToWindow()

Member Data Documentation

◆ Amp

◆ Clipping

◆ mAmp

◆ mAmpS

◆ mAmpT

◆ mCanClip

◆ mClip

◆ mNewPeak

◆ mNewPeakT

◆ mPeak

◆ mRatio

◆ mRatioClip

◆ mUIParent

◆ Ratio

◆ Symbol