audacity/src/effects/Echo.h

/**********************************************************************

  Audacity: A Digital Audio Editor

  Echo.h

  Dominic Mazzoni
  Vaughan Johnson (dialog)

**********************************************************************/

#ifndef __AUDACITY_EFFECT_ECHO__
#define __AUDACITY_EFFECT_ECHO__

#include <wx/event.h>
#include <wx/string.h>
#include <wx/textctrl.h>

#include "Effect.h"

class ShuttleGui;

#define ECHO_PLUGIN_SYMBOL XO("Echo")

class EffectEcho : public Effect
{
public:
   EffectEcho();
   virtual ~EffectEcho();

   // IdentInterface implementation

   virtual wxString GetSymbol();
   virtual wxString GetDescription();

   // EffectIdentInterface implementation

   virtual EffectType GetType();

   // EffectClientInterface implementation

   virtual int GetAudioInCount();
   virtual int GetAudioOutCount();
   virtual bool ProcessInitialize(sampleCount totalLen, ChannelNames chanMap = NULL);
   virtual bool ProcessFinalize();
   virtual sampleCount ProcessBlock(float **inBlock, float **outBlock, sampleCount blockLen);
   virtual bool GetAutomationParameters(EffectAutomationParameters & parms);
   virtual bool SetAutomationParameters(EffectAutomationParameters & parms);

   // Effect implementation
   virtual void PopulateOrExchange(ShuttleGui & S);
   virtual bool TransferDataToWindow();
   virtual bool TransferDataFromWindow();

private:
   // EffectEcho implementation

private:
   double delay;
   double decay;
   float *history;
   sampleCount histPos;
   sampleCount histLen;
};

#endif // __AUDACITY_EFFECT_ECHO__