PaulstretchBase.h

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/**********************************************************************
 
   Audacity: A Digital Audio Editor
   PaulstretchBase.h
 
   Nasca Octavian Paul (Paul Nasca)
 
 **********************************************************************/
#pragma once
 
#include "ShuttleAutomation.h"
#include "StatefulEffect.h"
#include <cfloat>
 
class WaveChannel;
 
class BUILTIN_EFFECTS_API PaulstretchBase : public StatefulEffect
{
public:
   static inline PaulstretchBase*
   FetchParameters(PaulstretchBase& e, EffectSettings&)
   {
      return &e;
   }
   static const ComponentInterfaceSymbol Symbol;
 
   PaulstretchBase();
   virtual ~PaulstretchBase();
 
   // ComponentInterface implementation
 
   ComponentInterfaceSymbol GetSymbol() const override;
   TranslatableString GetDescription() const override;
   ManualPageID ManualPage() const override;
 
   // EffectDefinitionInterface implementation
 
   EffectType GetType() const override;
 
   // Effect implementation
 
   double CalcPreviewInputLength(
      const EffectSettings& settings, double previewLength) const override;
   bool Process(EffectInstance& instance, EffectSettings& settings) override;
 
protected:
   // PaulstretchBase implementation
 
   size_t GetBufferSize(double rate) const;
 
   bool ProcessOne(
      const WaveChannel& track, WaveChannel& outputTrack, double t0, double t1,
      int count);
 
   float mAmount;
   float mTime_resolution; // seconds
 
   const EffectParameterMethods& Parameters() const override;
 
   static constexpr EffectParameter Amount {
      &PaulstretchBase::mAmount, L"Stretch Factor", 10.0f, 1.0, FLT_MAX, 1
   };
   static constexpr EffectParameter Time { &PaulstretchBase::mTime_resolution,
                                           L"Time Resolution",
                                           0.25f,
                                           0.00099f,
                                           FLT_MAX,
                                           1 };
};