Audacity 3.2.0
Public Member Functions | Static Public Attributes | Private Member Functions | List of all members
EffectStereoToMono Class Referencefinal

An Effect to convert stereo to mono. More...

#include <StereoToMono.h>

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

 EffectStereoToMono ()
 
virtual ~EffectStereoToMono ()
 
ComponentInterfaceSymbol GetSymbol () const override
 
TranslatableString GetDescription () const override
 
EffectType GetType () const override
 Type determines how it behaves. More...
 
bool IsInteractive () const override
 Whether the effect needs a dialog for entry of settings. More...
 
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...
 
bool Process (EffectInstance &instance, EffectSettings &settings) override
 
bool IsHiddenFromMenus () const override
 Default is false. More...
 
- 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
 
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...
 
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 NumericFormatSymbol 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)
 Re-invoke DoEffect on another Effect object that implements the work. More...
 
- Public Member Functions inherited from EffectBase
 EffectBase ()
 
 ~EffectBase () override
 
void SetTracks (TrackList *pTracks)
 
bool DoEffect (EffectSettings &settings, const InstanceFinder &finder, double projectRate, TrackList *list, WaveTrackFactory *factory, NotifyingSelectedRegion &selectedRegion, unsigned flags, const EffectSettingsAccessPtr &pAccess) override
 
- 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 void Preview (EffectSettingsAccess &access, std::function< void()> updateUI, bool dryOnly)=0
 Calculate temporary tracks of limited length with effect applied and play. More...
 
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
 
- Public Member Functions inherited from StatefulEffectUIServices
 ~StatefulEffectUIServices () override
 
std::unique_ptr< EffectEditorPopulateUI (const EffectPlugin &plugin, ShuttleGui &S, EffectInstance &instance, EffectSettingsAccess &access, const EffectOutputs *pOutputs) const override
 Allows PopulateOrExchange to return null. More...
 
virtual std::unique_ptr< EffectEditorPopulateOrExchange (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 (EffectPlugin &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< EffectEditorPopulateUI (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 Attributes

static const ComponentInterfaceSymbol Symbol { XO("Stereo To Mono") }
 
- 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

bool ProcessOne (sampleCount &curTime, sampleCount totalTime, WaveTrack *left, WaveTrack *right)
 

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 }
 
- Static Public Member Functions inherited from Effect
static EffectFetchParameters (Effect &e, EffectSettings &)
 
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 Member Functions inherited from EffectUIServices
static int DoMessageBox (const EffectPlugin &plugin, const TranslatableString &message, long style=DefaultMessageBoxStyle, const TranslatableString &titleStr={})
 
- Public Attributes inherited from EffectBase
TrackListmTracks {}
 
- 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, const WaveTrack *pRight, sampleCount *start, sampleCount *len)
 
void CopyInputTracks (bool allSyncLockSelected=false)
 
TrackAddToOutputTracks (const std::shared_ptr< Track > &t)
 
- Protected Member Functions inherited from EffectBase
virtual std::any BeginPreview (const EffectSettings &settings)
 Called when Preview() starts, to allow temporary effect state changes. More...
 
void Preview (EffectSettingsAccess &access, std::function< void()> updateUI, bool dryOnly) final
 Calculate temporary tracks of limited length with effect applied and play. More...
 
virtual bool CheckWhetherSkipEffect (const EffectSettings &settings) const =0
 After Init(), tell whether Process() should be skipped. More...
 
virtual double CalcPreviewInputLength (const EffectSettings &settings, double previewLength) const =0
 
void SetLinearEffectFlag (bool linearEffectFlag)
 
void SetPreviewFullSelectionFlag (bool previewDurationFlag)
 
bool IsPreviewing () const
 
void IncludeNotSelectedPreviewTracks (bool includeNotSelected)
 
void ReplaceProcessedTracks (const bool bGoodResult)
 
const TrackListinputTracks () const
 
const AudacityProjectFindProject () const
 
- Protected Attributes inherited from EffectBase
BasicUI::ProgressDialogmProgress {}
 
double mProjectRate {}
 
WaveTrackFactorymFactory {}
 
std::shared_ptr< TrackListmOutputTracks
 
double mT0 {}
 
double mT1 {}
 
wxArrayString mPresetNames
 
unsigned mUIFlags { 0 }
 
- Static Protected Attributes inherited from EffectBase
static int nEffectsDone = 0
 

Detailed Description

An Effect to convert stereo to mono.

Definition at line 16 of file StereoToMono.h.

Constructor & Destructor Documentation

◆ EffectStereoToMono()

EffectStereoToMono::EffectStereoToMono ( )

Definition at line 32 of file StereoToMono.cpp.

33{
34}

◆ ~EffectStereoToMono()

EffectStereoToMono::~EffectStereoToMono ( )
virtual

Definition at line 36 of file StereoToMono.cpp.

37{
38}

Member Function Documentation

◆ GetAudioInCount()

unsigned EffectStereoToMono::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 65 of file StereoToMono.cpp.

66{
67 return 2;
68}

◆ GetAudioOutCount()

unsigned EffectStereoToMono::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 70 of file StereoToMono.cpp.

71{
72 return 1;
73}

◆ GetDescription()

TranslatableString EffectStereoToMono::GetDescription ( ) const
overridevirtual

Implements ComponentInterface.

Definition at line 47 of file StereoToMono.cpp.

48{
49 return XO("Converts stereo tracks to mono");
50}
XO("Cut/Copy/Paste")

References XO().

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◆ GetSymbol()

ComponentInterfaceSymbol EffectStereoToMono::GetSymbol ( ) const
overridevirtual

Implements ComponentInterface.

Definition at line 42 of file StereoToMono.cpp.

43{
44 return Symbol;
45}
static const ComponentInterfaceSymbol Symbol
Definition: StereoToMono.h:19

References Symbol.

◆ GetType()

EffectType EffectStereoToMono::GetType ( ) const
overridevirtual

Type determines how it behaves.

Implements EffectDefinitionInterface.

Definition at line 54 of file StereoToMono.cpp.

55{
56 // Really EffectTypeProcess, but this prevents it from showing in the Effect Menu
57 return EffectTypeHidden;
58}
@ EffectTypeHidden

References EffectTypeHidden.

◆ IsHiddenFromMenus()

bool EffectStereoToMono::IsHiddenFromMenus ( ) const
overridevirtual

Default is false.

Reimplemented from EffectDefinitionInterface.

Definition at line 226 of file StereoToMono.cpp.

227{
228 return true;
229}

◆ IsInteractive()

bool EffectStereoToMono::IsInteractive ( ) const
overridevirtual

Whether the effect needs a dialog for entry of settings.

Implements EffectDefinitionInterface.

Definition at line 60 of file StereoToMono.cpp.

61{
62 return false;
63}

◆ Process()

bool EffectStereoToMono::Process ( EffectInstance instance,
EffectSettings settings 
)
overridevirtual

Implements StatefulEffectBase.

Definition at line 77 of file StereoToMono.cpp.

78{
79 // Do not use mWaveTracks here. We will possibly DELETE tracks,
80 // so we must use the "real" tracklist.
81 this->CopyInputTracks(); // Set up mOutputTracks.
82 bool bGoodResult = true;
83
84 // Determine the total time (in samples) used by all of the target tracks
85 sampleCount totalTime = 0;
86
87 auto trackRange = mOutputTracks->SelectedLeaders< WaveTrack >();
88 while (trackRange.first != trackRange.second)
89 {
90 auto left = *trackRange.first;
91 auto channels = TrackList::Channels(left);
92 if (channels.size() > 1)
93 {
94 auto right = *channels.rbegin();
95 auto leftRate = left->GetRate();
96 auto rightRate = right->GetRate();
97
98 if (leftRate != rightRate)
99 {
100 if (leftRate != mProjectRate)
101 {
102 mProgress->SetMessage(XO("Resampling left channel"));
103 left->Resample(mProjectRate, mProgress);
104 leftRate = mProjectRate;
105 }
106 if (rightRate != mProjectRate)
107 {
108 mProgress->SetMessage(XO("Resampling right channel"));
109 right->Resample(mProjectRate, mProgress);
110 rightRate = mProjectRate;
111 }
112 }
113 {
114 auto start = wxMin(left->TimeToLongSamples(left->GetStartTime()),
115 right->TimeToLongSamples(right->GetStartTime()));
116 auto end = wxMax(left->TimeToLongSamples(left->GetEndTime()),
117 right->TimeToLongSamples(right->GetEndTime()));
118
119 totalTime += (end - start);
120 }
121 }
122
123 ++trackRange.first;
124 }
125
126 // Process each stereo track
127 sampleCount curTime = 0;
128 bool refreshIter = false;
129
130 mProgress->SetMessage(XO("Mixing down to mono"));
131
132 trackRange = mOutputTracks->SelectedLeaders< WaveTrack >();
133 while (trackRange.first != trackRange.second)
134 {
135 auto left = *trackRange.first;
136 auto channels = TrackList::Channels(left);
137 if (channels.size() > 1)
138 {
139 auto right = *channels.rbegin();
140
141 bGoodResult = ProcessOne(curTime, totalTime, left, right);
142 if (!bGoodResult)
143 {
144 break;
145 }
146
147 // The right channel has been deleted, so we must restart from the beginning
148 refreshIter = true;
149 }
150
151 if (refreshIter)
152 {
153 trackRange = mOutputTracks->SelectedLeaders< WaveTrack >();
154 refreshIter = false;
155 }
156 else
157 {
158 ++trackRange.first;
159 }
160 }
161
162 this->ReplaceProcessedTracks(bGoodResult);
163 return bGoodResult;
164}
virtual void SetMessage(const TranslatableString &message)=0
Change an existing dialog's message.
std::shared_ptr< TrackList > mOutputTracks
Definition: EffectBase.h:111
double mProjectRate
Definition: EffectBase.h:105
BasicUI::ProgressDialog * mProgress
Definition: EffectBase.h:104
void ReplaceProcessedTracks(const bool bGoodResult)
Definition: EffectBase.cpp:232
void CopyInputTracks(bool allSyncLockSelected=false)
Definition: Effect.cpp:396
bool ProcessOne(sampleCount &curTime, sampleCount totalTime, WaveTrack *left, WaveTrack *right)
static auto Channels(TrackType *pTrack) -> TrackIterRange< TrackType >
Definition: Track.h:1544
A Track that contains audio waveform data.
Definition: WaveTrack.h:51
Positions or offsets within audio files need a wide type.
Definition: SampleCount.h:19
auto end(const Ptr< Type, BaseDeleter > &p)
Enables range-for.
Definition: PackedArray.h:159

References TrackList::Channels(), Effect::CopyInputTracks(), PackedArray::end(), EffectBase::mOutputTracks, EffectBase::mProgress, EffectBase::mProjectRate, ProcessOne(), EffectBase::ReplaceProcessedTracks(), BasicUI::ProgressDialog::SetMessage(), and XO().

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◆ ProcessOne()

bool EffectStereoToMono::ProcessOne ( sampleCount curTime,
sampleCount  totalTime,
WaveTrack left,
WaveTrack right 
)
private

Definition at line 166 of file StereoToMono.cpp.

167{
168 auto idealBlockLen = left->GetMaxBlockSize() * 2;
169 bool bResult = true;
170 sampleCount processed = 0;
171
172 auto start = wxMin(left->GetStartTime(), right->GetStartTime());
173 auto end = wxMax(left->GetEndTime(), right->GetEndTime());
174
175 Mixer::Inputs tracks;
176 for (auto pTrack : { left, right })
177 tracks.emplace_back(
178 pTrack->SharedPointer<const SampleTrack>(), GetEffectStages(*pTrack));
179
180 Mixer mixer(move(tracks),
181 true, // Throw to abort mix-and-render if read fails:
183 start,
184 end,
185 1,
186 idealBlockLen,
187 false, // Not interleaved
188 left->GetRate(), // Process() checks that left and right
189 // rates are the same
191
192 auto outTrack = left->EmptyCopy();
193 outTrack->ConvertToSampleFormat(floatSample);
194
195 while (auto blockLen = mixer.Process()) {
196 auto buffer = mixer.GetBuffer();
197 for (auto i = 0; i < blockLen; i++)
198 {
199 ((float *)buffer)[i] /= 2.0;
200 }
201 // If mixing channels that both had only 16 bit effective format
202 // (for example), and no gains or envelopes, still there should be
203 // dithering because of the averaging above, which may introduce samples
204 // lying between the quantization levels. So default the effectiveFormat
205 // to widest.
206 outTrack->Append(buffer, floatSample, blockLen, 1);
207
208 curTime += blockLen;
209 if (TotalProgress(curTime.as_double() / totalTime.as_double()))
210 {
211 return false;
212 }
213 }
214 outTrack->Flush();
215
216 double minStart = wxMin(left->GetStartTime(), right->GetStartTime());
217 left->Clear(left->GetStartTime(), left->GetEndTime());
218 left->Paste(minStart, outTrack.get());
219 mOutputTracks->UnlinkChannels(*left);
220 mOutputTracks->Remove(right);
222
223 return bResult;
224}
std::vector< MixerOptions::StageSpecification > GetEffectStages(const WaveTrack &track)
const TrackList * inputTracks() const
Definition: EffectBase.h:108
bool TotalProgress(double frac, const TranslatableString &={}) const
Definition: Effect.cpp:338
Functions for doing the mixdown of the tracks.
Definition: Mix.h:26
std::vector< Input > Inputs
Definition: Mix.h:43
static RealtimeEffectList & Get(AudacityProject &project)
void Clear()
Use only in the main thread. Sends Remove messages.
void Paste(double t0, const Track *src) override
Definition: WaveTrack.cpp:1367
double GetStartTime() const override
Get the time at which the first clip in the track starts.
Definition: WaveTrack.cpp:1802
size_t GetMaxBlockSize() const override
This returns a nonnegative number of samples meant to size a memory buffer.
Definition: WaveTrack.cpp:1611
void Clear(double t0, double t1) override
Definition: WaveTrack.cpp:652
double GetEndTime() const override
Get the time at which the last clip in the track ends, plus recorded stuff.
Definition: WaveTrack.cpp:1822
double GetRate() const override
Definition: WaveTrack.cpp:360
Holder EmptyCopy(const SampleBlockFactoryPtr &pFactory={}, bool keepLink=true) const
Definition: WaveTrack.cpp:574
double as_double() const
Definition: SampleCount.h:46
Immutable structure is an argument to Mixer's constructor.
Definition: MixerOptions.h:54

References sampleCount::as_double(), RealtimeEffectList::Clear(), WaveTrack::Clear(), WaveTrack::EmptyCopy(), PackedArray::end(), floatSample, RealtimeEffectList::Get(), GetEffectStages(), WaveTrack::GetEndTime(), WaveTrack::GetMaxBlockSize(), WaveTrack::GetRate(), WaveTrack::GetStartTime(), EffectBase::inputTracks(), EffectBase::mOutputTracks, WaveTrack::Paste(), and Effect::TotalProgress().

Referenced by Process().

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Member Data Documentation

◆ Symbol

const ComponentInterfaceSymbol EffectStereoToMono::Symbol { XO("Stereo To Mono") }
static

Definition at line 19 of file StereoToMono.h.

Referenced by GetSymbol().


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