audacia/src/effects/Compressor.h

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

  Audacity: A Digital Audio Editor

  Compressor.h

  Dominic Mazzoni

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

#ifndef __AUDACITY_EFFECT_COMPRESSOR__
#define __AUDACITY_EFFECT_COMPRESSOR__

#include <wx/bitmap.h>
#include <wx/checkbox.h>
#include <wx/event.h>
#include <wx/gdicmn.h>
#include <wx/slider.h>
#include <wx/string.h>
#include <wx/stattext.h>
#include <wx/window.h>
#include "../widgets/wxPanelWrapper.h"

#include "TwoPassSimpleMono.h"

class EffectCompressorPanel;
class ShuttleGui;

#define COMPRESSOR_PLUGIN_SYMBOL XO("Compressor")

class EffectCompressor final : public EffectTwoPassSimpleMono
{
public:

   EffectCompressor();
   virtual ~EffectCompressor();

   // IdentInterface implementation

   wxString GetSymbol() override;
   wxString GetDescription() override;

   // EffectIdentInterface implementation

   EffectType GetType() override;

   // EffectClientInterface implementation

   bool GetAutomationParameters(EffectAutomationParameters & parms) override;
   bool SetAutomationParameters(EffectAutomationParameters & parms) override;

   // Effect implementation

   bool Startup() override;
   void PopulateOrExchange(ShuttleGui & S) override;
   bool TransferDataToWindow() override;
   bool TransferDataFromWindow() override;

protected:
   // EffectTwoPassSimpleMono implementation

   bool InitPass1() override;
   bool InitPass2() override;
   bool NewTrackPass1() override;
   bool ProcessPass2(float *buffer, size_t len) override;
   bool TwoBufferProcessPass1
      (float *buffer1, size_t len1, float *buffer2, size_t len2) override;

private:
   // EffectCompressor implementation

   void FreshenCircle();
   float AvgCircle(float x);
   void Follow(float *buffer, float *env, size_t len, float *previous, size_t previous_len);
   float DoCompression(float x, double env);

   void OnSlider(wxCommandEvent & evt);
   void UpdateUI();

private:
   double    mRMSSum;
   int       mCircleSize;
   int       mCirclePos;
   double   *mCircle;

   double    mAttackTime;
   double    mThresholdDB;
   double    mNoiseFloorDB;
   double    mRatio;
   bool      mNormalize;	//MJS
   bool      mUsePeak;

   double    mDecayTime;   // The "Release" time.
   double    mAttackFactor;
   double    mAttackInverseFactor;
   double    mDecayFactor;
   double    mThreshold;
   double    mCompression;
   double    mNoiseFloor;
   int       mNoiseCounter;
   double    mGain;
   double    mLastLevel;
   float	   *mFollow1;
   float	   *mFollow2;
   size_t    mFollowLen;

   double    mMax;			//MJS

   EffectCompressorPanel *mPanel;

   wxStaticText *mThresholdLabel;
   wxSlider *mThresholdSlider;
   wxStaticText *mThresholdText;

   wxStaticText *mNoiseFloorLabel;
   wxSlider *mNoiseFloorSlider;
   wxStaticText *mNoiseFloorText;

   wxStaticText *mRatioLabel;
   wxSlider *mRatioSlider;
   wxStaticText *mRatioText;

   wxStaticText *mAttackLabel;
   wxSlider *mAttackSlider;
   wxStaticText *mAttackText;

   wxStaticText *mDecayLabel;
   wxSlider *mDecaySlider;
   wxStaticText *mDecayText;

   wxCheckBox *mGainCheckBox;
   wxCheckBox *mPeakCheckBox;

   DECLARE_EVENT_TABLE()
};

class EffectCompressorPanel final : public wxPanelWrapper
{
public:
   EffectCompressorPanel(wxWindow *parent,
                         double & threshold,
                         double & noiseFloor,
                         double & ratio);

private:
   void OnPaint(wxPaintEvent & evt);
   void OnSize(wxSizeEvent & evt);

private:
   double & threshold;
   double & noiseFloor;
   double & ratio;

   DECLARE_EVENT_TABLE()
};

#endif