Fade.h

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  Fade.h
 
  Dominic Mazzoni
 
**********************************************************************/
 
#ifndef __AUDACITY_EFFECT_FADE__
#define __AUDACITY_EFFECT_FADE__
 
#include "StatefulPerTrackEffect.h"
 
class EffectFade : public StatefulPerTrackEffect
{
public:
   EffectFade(bool fadeIn = false);
   virtual ~EffectFade();
 
   // ComponentInterface implementation
 
   ComponentInterfaceSymbol GetSymbol() const override;
   TranslatableString GetDescription() const override;
 
   // EffectDefinitionInterface implementation
 
   EffectType GetType() const override;
   bool IsInteractive() const override;
 
   unsigned GetAudioInCount() const override;
   unsigned GetAudioOutCount() const override;
   bool ProcessInitialize(EffectSettings &settings, double sampleRate,
      ChannelNames chanMap) override;
   size_t ProcessBlock(EffectSettings &settings,
      const float *const *inBlock, float *const *outBlock, size_t blockLen)
      override;
 
private:
   // EffectFade implementation
 
   bool mFadeIn;
   sampleCount mSample;
};
 
class EffectFadeIn final : public EffectFade
{
public:
   static const ComponentInterfaceSymbol Symbol;
 
   EffectFadeIn() : EffectFade{ true } {}
};
 
 
class EffectFadeOut final : public EffectFade
{
public:
   static const ComponentInterfaceSymbol Symbol;
 
   EffectFadeOut() : EffectFade{ false } {}
};
 
#endif