Effect.cpp

Go to the documentation of this file.

/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  Effect.cpp
 
  Dominic Mazzoni
  Vaughan Johnson
  Martyn Shaw
 
*******************************************************************//*******************************************************************/
#include "Effect.h"
 
#include <algorithm>
 
#include <wx/defs.h>
 
#include "BasicUI.h"
#include "ConfigInterface.h"
#include "ProjectNumericFormats.h"
#include "ShuttleAutomation.h"
#include "SyncLock.h"
#include "ViewInfo.h"
#include "WaveTrack.h"
#include "wxFileNameWrapper.h"
#include "NumericConverter.h"
 
#include <unordered_map>
 
Effect::Effect()
{
}
 
Effect::~Effect()
{
}
 
// ComponentInterface implementation
 
PluginPath Effect::GetPath() const
{
   return BUILTIN_EFFECT_PREFIX + GetSymbol().Internal();
}
 
ComponentInterfaceSymbol Effect::GetSymbol() const
{
   return {};
}
 
VendorSymbol Effect::GetVendor() const
{
   return XO("Audacity");
}
 
wxString Effect::GetVersion() const
{
   return AUDACITY_VERSION_STRING;
}
 
TranslatableString Effect::GetDescription() const
{
   return {};
}
 
// EffectDefinitionInterface implementation
 
EffectType Effect::GetType() const
{
   return EffectTypeNone;
}
 
EffectFamilySymbol Effect::GetFamily() const
{
   // Unusually, the internal and visible strings differ for the built-in
   // effect family.
   return { wxT("Audacity"), XO("Built-in") };
}
 
bool Effect::IsInteractive() const
{
   return true;
}
 
bool Effect::IsDefault() const
{
   return true;
}
 
auto Effect::RealtimeSupport() const -> RealtimeSince
{
   return RealtimeSince::Never;
}
 
bool Effect::SupportsAutomation() const
{
   return true;
}
 
const EffectParameterMethods &Effect::Parameters() const
{
   static const CapturedParameters<Effect> empty;
   return empty;
}
 
bool Effect::VisitSettings(SettingsVisitor &visitor, EffectSettings &settings)
{
   Parameters().Visit(*this, visitor, settings);
   return true;
}
 
bool Effect::VisitSettings(
   ConstSettingsVisitor &visitor, const EffectSettings &settings) const
{
   Parameters().Visit(*this, visitor, settings);
   return true;
}
 
bool Effect::SaveSettings(
   const EffectSettings &settings, CommandParameters & parms) const
{
   Parameters().Get( *this, settings, parms );
   return true;
}
 
bool Effect::LoadSettings(
   const CommandParameters & parms, EffectSettings &settings) const
{
   // The first argument, and with it the const_cast, will disappear when
   // all built-in effects are stateless.
   return Parameters().Set( *const_cast<Effect*>(this), parms, settings );
}
 
OptionalMessage Effect::LoadUserPreset(
   const RegistryPath & name, EffectSettings &settings) const
{
   // Find one string in the registry and then reinterpret it
   // as complete settings
   wxString parms;
   if (!GetConfig(GetDefinition(), PluginSettings::Private,
      name, wxT("Parameters"), parms))
      return {};
 
   return LoadSettingsFromString(parms, settings);
}
 
bool Effect::SaveUserPreset(
   const RegistryPath & name, const EffectSettings &settings) const
{
   // Save all settings as a single string value in the registry
   wxString parms;
   if (!SaveSettingsAsString(settings, parms))
      return false;
 
   return SetConfig(GetDefinition(), PluginSettings::Private,
      name, wxT("Parameters"), parms);
}
 
RegistryPaths Effect::GetFactoryPresets() const
{
   return {};
}
 
OptionalMessage Effect::LoadFactoryPreset(int id, EffectSettings &settings) const
{
   return { nullptr };
}
 
OptionalMessage Effect::LoadFactoryDefaults(EffectSettings &settings) const
{
   return LoadUserPreset(FactoryDefaultsGroup(), settings);
}
 
bool Effect::CanExportPresets() const
{
   return true;
}
 
bool Effect::HasOptions() const
{
   return false;
}
 
// EffectPlugin implementation
 
const EffectSettingsManager& Effect::GetDefinition() const
{
   return *this;
}
 
NumericFormatSymbol Effect::GetSelectionFormat()
{
   if( !IsBatchProcessing() && FindProject() )
      return ProjectNumericFormats::Get( *FindProject() ).GetSelectionFormat();
   return NumericConverter::HoursMinsSecondsFormat();
}
 
wxString Effect::GetSavedStateGroup()
{
   return wxT("SavedState");
}
 
// Effect implementation
 
bool Effect::SaveSettingsAsString(
   const EffectSettings &settings, wxString & parms) const
{
   CommandParameters eap;
   ShuttleGetAutomation S;
   S.mpEap = &eap;
   if( VisitSettings( S, settings ) ){
      ;// got eap value using VisitSettings.
   }
   // Won't be needed in future
   else if (!SaveSettings(settings, eap))
   {
      return false;
   }
 
   return eap.GetParameters(parms);
}
 
OptionalMessage Effect::LoadSettingsFromString(
   const wxString & parms, EffectSettings &settings) const
{
   // If the string starts with one of certain significant substrings,
   // then the rest of the string is reinterpreted as part of a registry key,
   // and a user or factory preset is then loaded.
   // (Where did these prefixes come from?  See EffectPresetsDialog; and
   // ultimately the uses of it by EffectManager::GetPreset, which is used by
   // the macro management dialog)
   wxString preset = parms;
   OptionalMessage result;
   if (preset.StartsWith(kUserPresetIdent))
   {
      preset.Replace(kUserPresetIdent, wxEmptyString, false);
      result = LoadUserPreset(UserPresetsGroup(preset), settings);
   }
   else if (preset.StartsWith(kFactoryPresetIdent))
   {
      preset.Replace(kFactoryPresetIdent, wxEmptyString, false);
      auto presets = GetFactoryPresets();
      result = LoadFactoryPreset(
         make_iterator_range( presets ).index( preset ), settings );
   }
   else if (preset.StartsWith(kCurrentSettingsIdent))
   {
      preset.Replace(kCurrentSettingsIdent, wxEmptyString, false);
      result = LoadUserPreset(CurrentSettingsGroup(), settings);
   }
   else if (preset.StartsWith(kFactoryDefaultsIdent))
   {
      preset.Replace(kFactoryDefaultsIdent, wxEmptyString, false);
      result = LoadUserPreset(FactoryDefaultsGroup(), settings);
   }
   else
   {
      // If the string did not start with any of the significant substrings,
      // then use VisitSettings or LoadSettings to reinterpret it,
      // or use LoadSettings.
      // This interprets what was written by SaveSettings, above.
      CommandParameters eap(parms);
      ShuttleSetAutomation S;
      S.SetForValidating( &eap );
      // VisitSettings returns false if not defined for this effect.
      // To do: fix const_cast in use of VisitSettings
      if ( !const_cast<Effect*>(this)->VisitSettings(S, settings) ) {
         // the old method...
         if (LoadSettings(eap, settings))
            return { nullptr };
      }
      else if( !S.bOK )
         result = {};
      else{
         result = { nullptr };
         S.SetForWriting( &eap );
         const_cast<Effect*>(this)->VisitSettings(S, settings);
      }
   }
 
   if (!result)
   {
      using namespace BasicUI;
      ShowMessageBox(
         XO("%s: Could not load settings below. Default settings will be used.\n\n%s")
            .Format( GetName(), preset ),
         MessageBoxOptions{}.Caption(GetName()));
      // We are using default settings and we still wish to continue.
      result = { nullptr };
   }
   return result;
}
 
unsigned Effect::TestUIFlags(unsigned mask) {
   return mask & mUIFlags;
}
 
bool Effect::IsBatchProcessing() const
{
   return mIsBatch;
}
 
void Effect::SetBatchProcessing()
{
   mIsBatch = true;
   // Save effect's internal state in a special registry path
   // just for this purpose
   // If effect is not stateful, this step doesn't really matter, and the
   // settings object is a dummy
   auto dummySettings = MakeSettings();
   SaveUserPreset(GetSavedStateGroup(), dummySettings);
}
 
void Effect::UnsetBatchProcessing()
{
   mIsBatch = false;
   // Restore effect's internal state from registry
   // If effect is not stateful, this call doesn't really matter, and the
   // settings object is a dummy
   auto dummySettings = MakeSettings();
   // Ignore failure
   (void ) LoadUserPreset(GetSavedStateGroup(), dummySettings);
}
 
bool Effect::Delegate(Effect &delegate, EffectSettings &settings)
{
   NotifyingSelectedRegion region;
   region.setTimes( mT0, mT1 );
 
   return delegate.DoEffect(settings, {}, mProjectRate, mTracks, mFactory,
      region, mUIFlags, nullptr);
}
 
bool Effect::TotalProgress(double frac, const TranslatableString &msg) const
{
   auto updateResult = (mProgress ?
      mProgress->Poll(frac * 1000, 1000, msg) :
      BasicUI::ProgressResult::Success);
   return (updateResult != BasicUI::ProgressResult::Success);
}
 
bool Effect::TrackProgress(
   int whichTrack, double frac, const TranslatableString &msg) const
{
   auto updateResult = (mProgress ?
      mProgress->Poll((whichTrack + frac) * 1000,
         (double) mNumTracks * 1000, msg) :
      BasicUI::ProgressResult::Success);
   return (updateResult != BasicUI::ProgressResult::Success);
}
 
bool Effect::TrackGroupProgress(
   int whichGroup, double frac, const TranslatableString &msg) const
{
   auto updateResult = (mProgress ?
      mProgress->Poll((whichGroup + frac) * 1000,
         (double) mNumGroups * 1000, msg) :
      BasicUI::ProgressResult::Success);
   return (updateResult != BasicUI::ProgressResult::Success);
}
 
void Effect::GetBounds(
   const WaveTrack &track, const WaveTrack *pRight,
   sampleCount *start, sampleCount *len)
{
   auto t0 = std::max( mT0, track.GetStartTime() );
   auto t1 = std::min( mT1, track.GetEndTime() );
 
   if ( pRight ) {
      t0 = std::min( t0, std::max( mT0, pRight->GetStartTime() ) );
      t1 = std::max( t1, std::min( mT1, pRight->GetEndTime() ) );
   }
 
   if (t1 > t0) {
      *start = track.TimeToLongSamples(t0);
      auto end = track.TimeToLongSamples(t1);
      *len = end - *start;
   }
   else {
      *start = 0;
      *len = 0;
   }
}
 
//
// private methods
//
// Use this method to copy the input tracks to mOutputTracks, if
// doing the processing on them, and replacing the originals only on success (and not cancel).
// Copy the group tracks that have tracks selected
// If not all sync-locked selected, then only selected wave tracks.
void Effect::CopyInputTracks(bool allSyncLockSelected)
{
   // Reset map
   mIMap.clear();
   mOMap.clear();
 
   mOutputTracks = TrackList::Create(
      const_cast<AudacityProject*>( FindProject() ) // how to remove this const_cast?
  );
 
   auto trackRange = mTracks->Any() +
      [&] (const Track *pTrack) {
         return allSyncLockSelected
         ? SyncLock::IsSelectedOrSyncLockSelected(pTrack)
         : track_cast<const WaveTrack*>( pTrack ) && pTrack->GetSelected();
      };
 
   for (auto aTrack : trackRange)
   {
      Track *o = mOutputTracks->Add(aTrack->Duplicate());
      mIMap.push_back(aTrack);
      mOMap.push_back(o);
   }
}
 
Track *Effect::AddToOutputTracks(const std::shared_ptr<Track> &t)
{
   mIMap.push_back(NULL);
   mOMap.push_back(t.get());
   return mOutputTracks->Add(t);
}
 
bool Effect::CheckWhetherSkipEffect(const EffectSettings &) const
{
   return false;
}
 
double Effect::CalcPreviewInputLength(
   const EffectSettings &, double previewLength) const
{
   return previewLength;
}