Fade.h

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  Fade.h
 
  Dominic Mazzoni
 
**********************************************************************/
#pragma once
 
#include "StatefulPerTrackEffect.h"
 
class BUILTIN_EFFECTS_API Fade : public StatefulPerTrackEffect
{
public:
   Fade(bool fadeIn = false);
   virtual ~Fade() 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;
 
protected:
   // EffectFade implementation
 
   bool mFadeIn;
   sampleCount mSample;
};
 
class BUILTIN_EFFECTS_API FadeIn final : public Fade
{
public:
   static const ComponentInterfaceSymbol Symbol;
 
   FadeIn();
 
   // ComponentInterface implementation
   ComponentInterfaceSymbol GetSymbol() const override;
   TranslatableString GetDescription() const override;
};
 
class BUILTIN_EFFECTS_API FadeOut final : public Fade
{
public:
   static const ComponentInterfaceSymbol Symbol;
 
   FadeOut();
 
   // ComponentInterface implementation
   ComponentInterfaceSymbol GetSymbol() const override;
   TranslatableString GetDescription() const override;
};