Audacity 3.2.0
Public Member Functions | Protected Member Functions | List of all members
Generator Class Referenceabstract

#include <Generator.h>

Inheritance diagram for Generator:
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Collaboration diagram for Generator:
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Public Member Functions

 Generator ()
 
- Public Member Functions inherited from StatefulEffect
 ~StatefulEffect () override
 
std::shared_ptr< EffectInstanceMakeInstance () const override
 Make an object maintaining short-term state of an Effect. 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 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 EffectParameterMethodsParameters () const
 
bool CanExportPresets () const override
 Whether the effect supports export of presets to files, and importing too. More...
 
bool HasOptions () const override
 
const EffectSettingsManagerGetDefinition () 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
EffectPluginoperator= (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 EffectSettingsManagerGetDefinition () 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< EffectInstanceMakeInstance () 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< EffectOutputsMakeOutputs () 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
 

Protected Member Functions

virtual bool GenerateTrack (const EffectSettings &settings, WaveTrack &tmp)=0
 GenerateTrack() must be overridden by the actual generator class. More...
 
bool Process (EffectInstance &instance, EffectSettings &settings) override
 
- 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 TrackListinputTracks () const
 
const AudacityProjectFindProject () const
 

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...
 
- Static Public Member Functions inherited from Effect
static EffectFetchParameters (Effect &e, EffectSettings &)
 
- Static Public Member Functions inherited from EffectBase
static std::optional< InstancePointerFindInstance (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...
 
- Public Attributes inherited from EffectBase
std::shared_ptr< TrackListmTracks {}
 
int mNumTracks {}
 
BasicUI::ProgressDialogmProgress {}
 
double mProjectRate {}
 
WaveTrackFactorymFactory {}
 
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 Attributes inherited from EffectBase
double mF0 {}
 
double mF1 {}
 
wxArrayString mPresetNames
 
unsigned mUIFlags { 0 }
 

Detailed Description

Definition at line 24 of file Generator.h.

Constructor & Destructor Documentation

◆ Generator()

Generator::Generator ( )
inline

Definition at line 27 of file Generator.h.

27{ }

Member Function Documentation

◆ GenerateTrack()

virtual bool Generator::GenerateTrack ( const EffectSettings settings,
WaveTrack tmp 
)
protectedpure virtual

GenerateTrack() must be overridden by the actual generator class.

Precondition
mDuration > 0.0
Postcondition
tmp is filled with data

Implemented in SilenceBase.

Referenced by Process().

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◆ Process()

bool Generator::Process ( EffectInstance instance,
EffectSettings settings 
)
overrideprotectedvirtual

Implements StatefulEffectBase.

Definition at line 26 of file libraries/lib-builtin-effects/Generator.cpp.

27{
28 const auto duration = settings.extra.GetDuration();
29
30 // Set up mOutputTracks.
31 // This effect needs all for sync-lock grouping.
32 EffectOutputTracks outputs { *mTracks, GetType(), { { mT0, mT1 } }, true };
33
34 // Iterate over the tracks
35 bool bGoodResult = true;
36 int ntrack = 0;
37
38 outputs.Get().Any().VisitWhile(bGoodResult,
39 [&](auto &&fallthrough){ return [&](WaveTrack &track) {
40 if (!track.GetSelected())
41 return fallthrough();
42 bool editClipCanMove = GetEditClipsCanMove();
43
44 //if we can't move clips, and we're generating into an empty space,
45 //make sure there's room.
46 if (!editClipCanMove &&
47 track.IsEmpty(mT0, mT1 + 1.0 / track.GetRate()) &&
48 !track.IsEmpty(mT0,
49 mT0 + duration - (mT1 - mT0) - 1.0 / track.GetRate()))
50 {
51 using namespace BasicUI;
53 XO("There is not enough room available to generate the audio"),
54 MessageBoxOptions {}.IconStyle(Icon::Error));
55 bGoodResult = false;
56 return;
57 }
58
59 if (duration > 0.0) {
60 // Create a temporary track
61 auto copy = track.EmptyCopy();
62 // Fill with data
64 bGoodResult = false;
65 if (bGoodResult) {
66 copy->Flush();
67 PasteTimeWarper warper{ mT1, mT0 + duration };
68 auto pProject = FindProject();
69 const auto &selectedRegion =
71 // According to https://manual.audacityteam.org/man/silence.html,
72 // generating silence with an audio selection should behave like
73 // the "Silence Audio" command, which doesn't affect track clip
74 // boundaries.
75 constexpr auto preserve = true;
76 constexpr auto merge = true;
77 track.ClearAndPaste(
78 selectedRegion.t0(), selectedRegion.t1(), *copy, preserve,
79 merge, &warper);
80 }
81 else
82 return;
83 }
84 else
85 // If the duration is zero, there's no need to actually
86 // generate anything
87 track.Clear(mT0, mT1);
88
89 ntrack++;
90 }; },
91 [&](Track &t) {
93 t.SyncLockAdjust(mT1, mT0 + duration);
94 }
95 );
96
97 if (bGoodResult) {
98 outputs.Commit();
99 mT1 = mT0 + duration; // Update selection.
100 }
101
102 return bGoodResult;
103}
XO("Cut/Copy/Paste")
static Settings & settings()
Definition: TrackInfo.cpp:51
bool GetEditClipsCanMove()
Definition: WaveTrack.cpp:3408
double mT1
Definition: EffectBase.h:123
std::shared_ptr< TrackList > mTracks
Definition: EffectBase.h:116
double mT0
Definition: EffectBase.h:122
const AudacityProject * FindProject() const
Definition: EffectBase.cpp:220
virtual EffectType GetType() const =0
Type determines how it behaves.
Use this object to copy the input tracks to tentative outputTracks.
virtual bool GenerateTrack(const EffectSettings &settings, WaveTrack &tmp)=0
GenerateTrack() must be overridden by the actual generator class.
Unit slope but with either a jump (pasting more) or a flat interval (pasting less)
Definition: TimeWarper.h:181
static bool IsSyncLockSelected(const Track &track)
Definition: SyncLock.cpp:80
Abstract base class for an object holding data associated with points on a time axis.
Definition: Track.h:110
NotifyingSelectedRegion selectedRegion
Definition: ViewInfo.h:216
static ViewInfo & Get(AudacityProject &project)
Definition: ViewInfo.cpp:235
A Track that contains audio waveform data.
Definition: WaveTrack.h:203
MessageBoxResult ShowMessageBox(const TranslatableString &message, MessageBoxOptions options={})
Show a modal message box with either Ok or Yes and No, and optionally Cancel.
Definition: BasicUI.h:287
void copy(const T *src, T *dst, int32_t n)
Definition: VectorOps.h:40
MessageBoxOptions && IconStyle(Icon style) &&
Definition: BasicUI.h:104

References staffpad::vo::copy(), EffectBase::FindProject(), GenerateTrack(), ViewInfo::Get(), GetEditClipsCanMove(), EffectDefinitionInterface::GetType(), BasicUI::MessageBoxOptions::IconStyle(), SyncLock::IsSyncLockSelected(), EffectBase::mT0, EffectBase::mT1, EffectBase::mTracks, ViewInfo::selectedRegion, settings(), BasicUI::ShowMessageBox(), and XO().

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