An abstract Effect class that simplifies the implementation of a basic monaural effect. Inherit from it if your effect just modifies a single track in place and doesn't care how many samples it gets at a time. More...

#include <SimpleMono.h>

Inheritance diagram for EffectSimpleMono:

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Collaboration diagram for EffectSimpleMono:

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Public Member Functions
bool	Process () override

Public Member Functions inherited from Effect
	Effect ()

virtual	~Effect ()

PluginPath	GetPath () override

ComponentInterfaceSymbol	GetSymbol () override

VendorSymbol	GetVendor () override

wxString	GetVersion () override

TranslatableString	GetDescription () override

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

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

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

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

bool	IsLegacy () override

bool	SupportsRealtime () override
	Whether the effect supports realtime previewing (while audio is playing). More...

bool	SupportsAutomation () override
	Whether the effect can be used without the UI, in a macro. More...

bool	GetAutomationParameters (CommandParameters &parms) override
	Save current settings into parms. More...

bool	SetAutomationParameters (CommandParameters &parms) override
	Change settings to those stored in parms. More...

bool	LoadUserPreset (const RegistryPath &name) override
	Change settings to a user-named preset. More...

bool	SaveUserPreset (const RegistryPath &name) override
	Save current settings as a user-named preset. More...

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

bool	LoadFactoryPreset (int id) override
	Change settings to the preset whose name is `GetFactoryPresets()[id]` More...

bool	LoadFactoryDefaults () override
	Change settings back to "factory default". More...

bool	SetHost (EffectHostInterface *host) override

unsigned	GetAudioInCount () override

unsigned	GetAudioOutCount () override

int	GetMidiInCount () override

int	GetMidiOutCount () override

sampleCount	GetLatency () override
	Called for destructive, non-realtime effect computation. More...

size_t	GetTailSize () override

void	SetSampleRate (double rate) override

size_t	SetBlockSize (size_t maxBlockSize) override

size_t	GetBlockSize () const override

bool	ProcessInitialize (sampleCount totalLen, ChannelNames chanMap=NULL) override
	Called for destructive, non-realtime effect computation. More...

bool	ProcessFinalize () override
	Called for destructive, non-realtime effect computation. More...

size_t	ProcessBlock (float inBlock, float outBlock, size_t blockLen) override
	Called for destructive, non-realtime effect computation. More...

bool	RealtimeInitialize () override

bool	RealtimeAddProcessor (unsigned numChannels, float sampleRate) override

bool	RealtimeFinalize () override

bool	RealtimeSuspend () override

bool	RealtimeResume () noexcept override

bool	RealtimeProcessStart () override

size_t	RealtimeProcess (int group, float inbuf, float outbuf, size_t numSamples) override

bool	RealtimeProcessEnd () noexcept override

int	ShowClientInterface (wxWindow &parent, wxDialog &dialog, bool forceModal=false) override

bool	PopulateUI (ShuttleGui &S) final
	Adds controls to a panel that is given as the parent window of `S` More...

bool	IsGraphicalUI () override

bool	ValidateUI () override

bool	HideUI () override

bool	CloseUI () override

bool	CanExportPresets () override

void	ExportPresets () override

void	ImportPresets () override

bool	HasOptions () override

void	ShowOptions () override

EffectDefinitionInterface &	GetDefinition () override

double	GetDuration () override

NumericFormatSymbol	GetDurationFormat () override

virtual NumericFormatSymbol	GetSelectionFormat ()

void	SetDuration (double duration) override

RegistryPath	GetUserPresetsGroup (const RegistryPath &name) override

RegistryPath	GetCurrentSettingsGroup () override

RegistryPath	GetFactoryDefaultsGroup () override

virtual wxString	GetSavedStateGroup ()

int	ShowHostInterface (wxWindow &parent, const EffectDialogFactory &factory, bool forceModal=false) override

unsigned	TestUIFlags (unsigned mask)

void	SetPresetParameters (const wxArrayString Names, const wxArrayString Values)

virtual bool	Startup (EffectUIClientInterface *client)

virtual bool	GetAutomationParametersAsString (wxString &parms)

virtual bool	SetAutomationParametersFromString (const wxString &parms)

virtual bool	IsBatchProcessing ()

virtual void	SetBatchProcessing (bool start)

bool	DoEffect (double projectRate, TrackList list, WaveTrackFactory factory, NotifyingSelectedRegion &selectedRegion, unsigned flags, wxWindow *pParent=nullptr, const EffectDialogFactory &dialogFactory={})

bool	Delegate (Effect &delegate, wxWindow &parent, const EffectDialogFactory &factory)

int	MessageBox (const TranslatableString &message, long style=DefaultMessageBoxStyle, const TranslatableString &titleStr={})

virtual bool	Startup ()

Public Member Functions inherited from EffectUIClientInterface
virtual	~EffectUIClientInterface ()

Public Member Functions inherited from EffectProcessor
virtual	~EffectProcessor ()

Public Member Functions inherited from EffectDefinitionInterface
virtual	~EffectDefinitionInterface ()

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

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

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

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

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

Public Member Functions inherited from ComponentInterface
virtual	~ComponentInterface ()

TranslatableString	GetName ()

virtual bool	DefineParams (ShuttleParams &WXUNUSED(S))

Public Member Functions inherited from EffectUIHostInterface
virtual	~EffectUIHostInterface ()

Public Member Functions inherited from EffectHostInterface
virtual	~EffectHostInterface ()

Protected Member Functions
virtual bool	NewTrackSimpleMono ()=0

virtual bool	ProcessSimpleMono (float *buffer, size_t len)=0

Protected Member Functions inherited from Effect
bool	EnableApply (bool enable=true)

bool	EnablePreview (bool enable=true)

virtual bool	Init ()

virtual bool	CheckWhetherSkipEffect ()

virtual bool	ProcessPass ()

virtual bool	InitPass1 ()

virtual bool	InitPass2 ()

virtual void	End ()

virtual double	CalcPreviewInputLength (double previewLength)

virtual void	Preview (bool dryOnly)

virtual void	PopulateOrExchange (ShuttleGui &S)

virtual bool	TransferDataToWindow ()

virtual bool	TransferDataFromWindow ()

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

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

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

int	GetNumWaveTracks ()

int	GetNumWaveGroups ()

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

void	SetLinearEffectFlag (bool linearEffectFlag)

void	SetPreviewFullSelectionFlag (bool previewDurationFlag)

bool	IsPreviewing ()

void	IncludeNotSelectedPreviewTracks (bool includeNotSelected)

void	CopyInputTracks (bool allSyncLockSelected=false)

std::shared_ptr< AddedAnalysisTrack >	AddAnalysisTrack (const wxString &name=wxString())

ModifiedAnalysisTrack	ModifyAnalysisTrack (const LabelTrack *pOrigTrack, const wxString &name=wxString())

void	ReplaceProcessedTracks (const bool bGoodResult)

Track *	AddToOutputTracks (const std::shared_ptr< Track > &t)

const TrackList *	inputTracks () const

const AudacityProject *	FindProject () const

Protected Attributes
int	mCurTrackNum

double	mCurRate

double	mCurT0

double	mCurT1

int	mCurChannel

Protected Attributes inherited from Effect
BasicUI::ProgressDialog *	mProgress = nullptr

double	mProjectRate

double	mSampleRate

WaveTrackFactory *	mFactory

std::shared_ptr< TrackList >	mOutputTracks

double	mT0

double	mT1

wxArrayString	mPresetNames

wxArrayString	mPresetValues

int	mPass

wxWeakRef< wxDialog >	mHostUIDialog
	This smart pointer tracks the lifetime of the dialog. More...

wxWeakRef< wxDialog >	mUIDialog
	This weak pointer may be the same as the above, or null. More...

wxWindow *	mUIParent

unsigned	mUIFlags { 0 }

sampleCount	mSampleCnt

Private Member Functions
bool	ProcessOne (WaveTrack *t, sampleCount start, sampleCount end)

Additional Inherited Members
Public Types inherited from Effect
enum	: long { DefaultMessageBoxStyle = wxOK \| wxCENTRE }

Static Public Member Functions inherited from Effect
static void	IncEffectCounter ()

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 Attributes inherited from Effect
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>")

Static Protected Attributes inherited from Effect
static int	nEffectsDone =0

Detailed Description

An abstract Effect class that simplifies the implementation of a basic monaural effect. Inherit from it if your effect just modifies a single track in place and doesn't care how many samples it gets at a time.

Your derived class only needs to implement GetSymbol, GetEffectAction, and ProcessSimpleMono.

Definition at line 24 of file SimpleMono.h.

Member Function Documentation

◆ NewTrackSimpleMono()

bool EffectSimpleMono::NewTrackSimpleMono ( )

protectedpure virtual

Definition at line 125 of file SimpleMono.cpp.

 {
    return true;
 }

Referenced by Process().

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◆ Process()

bool EffectSimpleMono::Process ( )

overridevirtual

If Process() is not overridden, it uses ProcessInitialize(), ProcessBlock(), and ProcessFinalize() methods of EffectProcessor, and also GetLatency() to determine how many leading output samples to discard and how many extra samples to produce.

Reimplemented from Effect.

Definition at line 29 of file SimpleMono.cpp.

 {
    //Iterate over each track
    this->CopyInputTracks(); // Set up mOutputTracks.
    bool bGoodResult = true;
  
    mCurTrackNum = 0;
    for( auto pOutWaveTrack : mOutputTracks->Selected< WaveTrack >() )
    {
       //Get start and end times from track
       double trackStart = pOutWaveTrack->GetStartTime();
       double trackEnd = pOutWaveTrack->GetEndTime();
  
       //Set the current bounds to whichever left marker is
       //greater and whichever right marker is less:
       mCurT0 = mT0 < trackStart? trackStart: mT0;
       mCurT1 = mT1 > trackEnd? trackEnd: mT1;
  
       // Process only if the right marker is to the right of the left marker
       if (mCurT1 > mCurT0) {
  
          //Transform the marker timepoints to samples
          auto start = pOutWaveTrack->TimeToLongSamples(mCurT0);
          auto end = pOutWaveTrack->TimeToLongSamples(mCurT1);
  
          //Get the track rate and samples
          mCurRate = pOutWaveTrack->GetRate();
          mCurChannel = pOutWaveTrack->GetChannel();
  
          //NewTrackSimpleMono() will returns true by default
          //ProcessOne() processes a single track
          if (!NewTrackSimpleMono() || !ProcessOne(pOutWaveTrack, start, end))
          {
             bGoodResult = false;
             break;
          }
       }
  
       mCurTrackNum++;
    }
  
    this->ReplaceProcessedTracks(bGoodResult);
    return bGoodResult;
 }

References Effect::CopyInputTracks(), mCurChannel, mCurRate, mCurT0, mCurT1, mCurTrackNum, Effect::mOutputTracks, Effect::mT0, Effect::mT1, NewTrackSimpleMono(), ProcessOne(), and Effect::ReplaceProcessedTracks().

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◆ ProcessOne()

bool EffectSimpleMono::ProcessOne	(	WaveTrack *	t,
		sampleCount	start,
		sampleCount	end
	)

private

Definition at line 77 of file SimpleMono.cpp.

 {
    //Get the length of the buffer (as double). len is
    //used simple to calculate a progress meter, so it is easier
    //to make it a double now than it is to do it later
    auto len = (end - start).as_double();
  
    //Initiate a processing buffer.  This buffer will (most likely)
    //be shorter than the length of the track being processed.
    Floats buffer{ track->GetMaxBlockSize() };
  
    //Go through the track one buffer at a time. s counts which
    //sample the current buffer starts at.
    auto s = start;
    while (s < end) {
       //Get a block of samples (smaller than the size of the buffer)
       //Adjust the block size if it is the final block in the track
       const auto block =
          limitSampleBufferSize( track->GetBestBlockSize(s), end - s );
  
       //Get the samples from the track and put them in the buffer
       track->GetFloats(buffer.get(), s, block);
  
       //Process the buffer.  If it fails, clean up and exit.
       if (!ProcessSimpleMono(buffer.get(), block))
          //Return false because the effect failed.
          return false;
  
       //Processing succeeded. copy the newly-changed samples back
       //onto the track.
       track->Set((samplePtr) buffer.get(), floatSample, s, block);
  
       //Increment s one blockfull of samples
       s += block;
  
       //Update the Progress meter
       if (TrackProgress(mCurTrackNum,
                         (s - start).as_double() /
                         len))
          return false;
    }
  
    //Return true because the effect processing succeeded.
    return true;
 }

References floatSample, WaveTrack::GetBestBlockSize(), SampleTrack::GetFloats(), WaveTrack::GetMaxBlockSize(), limitSampleBufferSize(), mCurTrackNum, ProcessSimpleMono(), WaveTrack::Set(), and Effect::TrackProgress().

Referenced by Process().

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◆ ProcessSimpleMono()

virtual bool EffectSimpleMono::ProcessSimpleMono	(	float *	buffer,
		size_t	len
	)

int EffectSimpleMono::mCurTrackNum

protected

Definition at line 41 of file SimpleMono.h.

Referenced by Process(), and ProcessOne().

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

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ NewTrackSimpleMono()

◆ Process()

◆ ProcessOne()

◆ ProcessSimpleMono()

Member Data Documentation

◆ mCurChannel

◆ mCurRate

◆ mCurT0

◆ mCurT1

◆ mCurTrackNum