mirror of
https://github.com/cookiengineer/audacity
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101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/**********************************************************************
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Audacity: A Digital Audio Editor
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ChangeTempo.h
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Vaughan Johnson, Dominic Mazzoni
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Change Tempo effect provides speeding up or
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slowing down tempo without changing pitch.
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**********************************************************************/
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#if USE_SOUNDTOUCH
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#ifndef __AUDACITY_EFFECT_CHANGETEMPO__
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#define __AUDACITY_EFFECT_CHANGETEMPO__
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#include <wx/event.h>
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#include <wx/slider.h>
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#include <wx/string.h>
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#include <wx/textctrl.h>
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#include "SoundTouchEffect.h"
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class ShuttleGui;
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#define CHANGETEMPO_PLUGIN_SYMBOL XO("Change Tempo")
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class EffectChangeTempo : public EffectSoundTouch
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{
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public:
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EffectChangeTempo();
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virtual ~EffectChangeTempo();
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// IdentInterface implementation
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virtual wxString GetSymbol();
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virtual wxString GetDescription();
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// EffectIdentInterface implementation
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virtual EffectType GetType();
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virtual bool SupportsAutomation();
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// EffectClientInterface implementation
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virtual bool GetAutomationParameters(EffectAutomationParameters & parms);
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virtual bool SetAutomationParameters(EffectAutomationParameters & parms);
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// Effect implementation
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virtual bool Init();
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virtual bool CheckWhetherSkipEffect();
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virtual bool Process();
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virtual double CalcPreviewInputLength(double previewLength);
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virtual void PopulateOrExchange(ShuttleGui & S);
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virtual bool TransferDataToWindow();
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virtual bool TransferDataFromWindow();
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private:
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// EffectChangeTempo implementation
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// handlers
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void OnText_PercentChange(wxCommandEvent & evt);
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void OnSlider_PercentChange(wxCommandEvent & evt);
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void OnText_FromBPM(wxCommandEvent & evt);
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void OnText_ToBPM(wxCommandEvent & evt);
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void OnText_ToLength(wxCommandEvent & evt);
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// helper fns
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void Update_Text_PercentChange(); // Update control per current m_PercentChange.
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void Update_Slider_PercentChange(); // Update control per current m_PercentChange.
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void Update_Text_ToBPM(); // Use m_FromBPM & m_PercentChange to set new m_ToBPM & control.
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void Update_Text_ToLength(); // Use m_FromLength & m_PercentChange to set new m_ToLength & control.
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private:
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double m_PercentChange; // percent change to apply to tempo
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// -100% is meaningless, but sky's the upper limit
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double m_FromBPM; // user-set beats-per-minute. Zero means not yet set.
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double m_ToBPM; // Zero value means not yet set.
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double m_FromLength; // starting length of selection
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double m_ToLength; // target length of selection
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bool m_bLoopDetect;
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// controls
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wxTextCtrl * m_pTextCtrl_PercentChange;
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wxSlider * m_pSlider_PercentChange;
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wxTextCtrl * m_pTextCtrl_FromBPM;
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wxTextCtrl * m_pTextCtrl_ToBPM;
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wxTextCtrl * m_pTextCtrl_FromLength;
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wxTextCtrl * m_pTextCtrl_ToLength;
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DECLARE_EVENT_TABLE();
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};
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#endif // __AUDACITY_EFFECT_CHANGETEMPO__
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#endif // USE_SOUNDTOUCH
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