audacia/src/effects/Amplify.h

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

  Audacity: A Digital Audio Editor

  Amplify.h

  Dominic Mazzoni

  This rewritten class supports a smart Amplify effect - it calculates
  the maximum amount of gain that can be applied to all tracks without
  causing clipping and selects this as the default parameter.

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

#ifndef __AUDACITY_EFFECT_AMPLIFY__
#define __AUDACITY_EFFECT_AMPLIFY__

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

#include "../ShuttleGui.h"

#include "Effect.h"

#define AMPLIFY_PLUGIN_SYMBOL XO("Amplify")

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

   // IdentInterface implementation

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

   // EffectIdentInterface implementation

   virtual EffectType GetType();

   // EffectClientInterface implementation

   virtual int GetAudioInCount();
   virtual int GetAudioOutCount();
   virtual sampleCount ProcessBlock(float **inBlock, float **outBlock, sampleCount blockLen);
   virtual bool GetAutomationParameters(EffectAutomationParameters & parms);
   virtual bool SetAutomationParameters(EffectAutomationParameters & parms);

   // Effect implementation

   virtual bool Init();
   virtual void Preview(bool dryOnly);
   virtual void PopulateOrExchange(ShuttleGui & S);
   virtual bool TransferDataToWindow();
   virtual bool TransferDataFromWindow();

private:
   // EffectAmplify implementation

   void OnAmpText(wxCommandEvent & evt);
   void OnPeakText(wxCommandEvent & evt);
   void OnAmpSlider(wxCommandEvent & evt);
   void OnClipCheckBox(wxCommandEvent & evt);
   void CheckClip();

private:
   float mPeak;

   float mRatio;
   float mAmp;
   float mNewPeak;
   bool mCanClip;

   wxSlider *mAmpS;
   wxTextCtrl *mAmpT;
   wxTextCtrl *mNewPeakT;
   wxCheckBox *mClip;

   DECLARE_EVENT_TABLE();
};

#endif // __AUDACITY_EFFECT_AMPLIFY__