147 lines
4.2 KiB
C++
147 lines
4.2 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 "SoundTouchEffect.h"
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#include <wx/intl.h>
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#include <wx/dialog.h>
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#include <wx/slider.h>
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class wxString;
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class wxTextCtrl;
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class EffectChangeTempo : public EffectSoundTouch {
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public:
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EffectChangeTempo();
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virtual wxString GetEffectName() {
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return wxString(_("Change Tempo..."));
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}
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virtual std::set<wxString> GetEffectCategories() {
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std::set<wxString> result;
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result.insert(wxT("http://audacityteam.org/namespace#PitchAndTempo"));
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return result;
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}
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virtual wxString GetEffectIdentifier() {
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return wxString(wxT("ChangeTempo"));
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}
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virtual wxString GetEffectAction() {
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return wxString(_("Changing Tempo"));
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}
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// Useful only after PromptUser values have been set.
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virtual wxString GetEffectDescription();
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virtual bool Init();
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virtual bool PromptUser();
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virtual bool TransferParameters( Shuttle & shuttle );
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virtual bool CheckWhetherSkipEffect() { return (m_PercentChange == 0.0); }
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virtual bool Process();
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double CalcPreviewInputLength(double previewLength);
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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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unsigned int m_FromBPM; // user-set beats-per-minute. Zero means not yet set.
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unsigned int 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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friend class ChangeTempoDialog;
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};
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//----------------------------------------------------------------------------
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// ChangeTempoDialog
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//----------------------------------------------------------------------------
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class ChangeTempoDialog:public EffectDialog {
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public:
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ChangeTempoDialog(EffectChangeTempo * effect,
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wxWindow * parent);
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void PopulateOrExchange(ShuttleGui & S);
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bool TransferDataToWindow();
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bool TransferDataFromWindow();
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private:
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// handlers
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void OnText_PercentChange(wxCommandEvent & event);
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void OnSlider_PercentChange(wxCommandEvent & event);
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void OnText_FromBPM(wxCommandEvent & event);
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void OnText_ToBPM(wxCommandEvent & event);
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void OnText_ToLength(wxCommandEvent & event);
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void OnPreview( wxCommandEvent &event );
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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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EffectChangeTempo * mEffect;
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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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public:
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// effect parameters
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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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// Slider is (-100, 200], but textCtrls can set higher.
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unsigned int m_FromBPM; // user-set beats-per-minute. Zero means not yet set.
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unsigned int 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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private:
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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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// Indentation settings for Vim and Emacs and unique identifier for Arch, a
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// version control system. Please do not modify past this point.
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//
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// Local Variables:
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// c-basic-offset: 3
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// indent-tabs-mode: nil
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// End:
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//
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// vim: et sts=3 sw=3
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// arch-tag: d5538ef9-b7b0-4dd9-a23b-8cce354262a8
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