audacia/src/effects/ChangePitch.h

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

   Audacity: A Digital Audio Editor
   Audacity(R) is copyright (c) 1999-2012 Audacity Team.
   License: GPL v2.  See License.txt.

  ChangePitch.h
  Vaughan Johnson, Dominic Mazzoni, Steve Daulton

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

\file ChangePitch.h
\brief Change Pitch effect provides raising or lowering
the pitch without changing the tempo.

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


#if USE_SOUNDTOUCH

#ifndef __AUDACITY_EFFECT_CHANGEPITCH__
#define __AUDACITY_EFFECT_CHANGEPITCH__

#if USE_SBSMS
#include "SBSMSEffect.h"
#endif

#include "SoundTouchEffect.h"

class wxSlider;
class wxChoice;
class wxCheckBox;
class wxTextCtrl;
class wxSpinCtrl;
class ShuttleGui;

class EffectChangePitch final : public EffectSoundTouch
{
public:
   static const ComponentInterfaceSymbol Symbol;

   EffectChangePitch();
   virtual ~EffectChangePitch();

   // ComponentInterface implementation

   ComponentInterfaceSymbol GetSymbol() override;
   TranslatableString GetDescription() override;
   ManualPageID ManualPage() override;

   // EffectDefinitionInterface implementation

   EffectType GetType() override;

   // EffectClientInterface implementation

   bool DefineParams( ShuttleParams & S ) override;
   bool GetAutomationParameters(CommandParameters & parms) override;
   bool SetAutomationParameters(CommandParameters & parms) override;
   bool LoadFactoryDefaults() override;

   // Effect implementation

   bool Init() override;
   bool Process() override;
   bool CheckWhetherSkipEffect() override;
   void PopulateOrExchange(ShuttleGui & S) override;
   bool TransferDataToWindow() override;
   bool TransferDataFromWindow() override;

private:
   // EffectChangePitch implementation

   // Deduce m_FromFrequency from the samples at the beginning of
   // the selection. Then set some other params accordingly.
   void DeduceFrequencies();

   // calculations
   void Calc_ToPitch(); // Update m_nToPitch from NEW m_dSemitonesChange.
   void Calc_ToOctave();
   void Calc_SemitonesChange_fromPitches();
   void Calc_SemitonesChange_fromOctaveChange();
   void Calc_SemitonesChange_fromPercentChange();
   void Calc_ToFrequency(); // Update m_ToFrequency from m_FromFrequency & m_dPercentChange.
   void Calc_PercentChange(); // Update m_dPercentChange based on NEW m_dSemitonesChange.

   // handlers
   void OnChoice_FromPitch(wxCommandEvent & evt);
   void OnSpin_FromOctave(wxCommandEvent & evt);
   void OnChoice_ToPitch(wxCommandEvent & evt);
   void OnSpin_ToOctave(wxCommandEvent & evt);

   void OnText_SemitonesChange(wxCommandEvent & evt);

   void OnText_FromFrequency(wxCommandEvent & evt);
   void OnText_ToFrequency(wxCommandEvent & evt);

   void OnText_PercentChange(wxCommandEvent & evt);
   void OnSlider_PercentChange(wxCommandEvent & evt);

   // helper fns for controls
   void Update_Choice_FromPitch();
   void Update_Spin_FromOctave();
   void Update_Choice_ToPitch();
   void Update_Spin_ToOctave();

   void Update_Text_SemitonesChange();

   void Update_Text_FromFrequency();
   void Update_Text_ToFrequency();

   void Update_Text_PercentChange(); // Update control per current m_dPercentChange.
   void Update_Slider_PercentChange(); // Update control per current m_dPercentChange.

private:
   bool mUseSBSMS;
   // effect parameters
   int    m_nFromPitch;          // per PitchIndex()
   int    m_nFromOctave;         // per PitchOctave()
   int    m_nToPitch;            // per PitchIndex()
   int    m_nToOctave;           // per PitchOctave()

   double m_FromFrequency;       // starting frequency of selection
   double m_ToFrequency;         // target frequency of selection

   double m_dSemitonesChange;    // how many semitones to change pitch
   double m_dStartFrequency;     // starting frequency of first 0.2s of selection
   double m_dPercentChange;      // percent change to apply to pitch
                                 // Slider is (-100, 200], but textCtrls can set higher.

   bool m_bLoopDetect; // Used to avoid loops in initialization and in event handling.

   // controls
   wxChoice *     m_pChoice_FromPitch;
   wxSpinCtrl *   m_pSpin_FromOctave;
   wxChoice *     m_pChoice_ToPitch;
   wxSpinCtrl *   m_pSpin_ToOctave;
   wxTextCtrl *   m_pTextCtrl_SemitonesChange;

   wxTextCtrl *   m_pTextCtrl_FromFrequency;
   wxTextCtrl *   m_pTextCtrl_ToFrequency;
   wxTextCtrl *   m_pTextCtrl_PercentChange;
   wxSlider *     m_pSlider_PercentChange;

#if USE_SBSMS
   wxCheckBox *   mUseSBSMSCheckBox;
#endif

   DECLARE_EVENT_TABLE()
};

#endif // __AUDACITY_EFFECT_CHANGEPITCH__

#endif // USE_SOUNDTOUCH