root/trunk/libjdkmidi/trunk/include/jdkmidi/keysig.h

/*
 *  libjdkmidi-2004 C++ Class Library for MIDI
 *
 *  Copyright (C) 2004  J.D. Koftinoff Software, Ltd.
 *  www.jdkoftinoff.com
 *  jeffk@jdkoftinoff.com
 *
 *  *** RELEASED UNDER THE GNU GENERAL PUBLIC LICENSE (GPL) April 27, 2004 ***
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/*
** Copyright 1986 to 1998 By J.D. Koftinoff Software, Ltd.
**
** All rights reserved.
**
** No one may duplicate this source code in any form for any reason
** without the written permission given by J.D. Koftinoff Software, Ltd.
**
*/

#ifndef JDKMIDI_KEYSIG_H
#define JDKMIDI_KEYSIG_H

#include "jdkmidi/midi.h"

namespace jdkmidi
{
  enum MIDIAccidentalType
  {
    ACCFlat=0,
    ACCNatural,
    ACCSharp
  };
  
  class MIDIKeySignature
  {
    public:
    
      MIDIKeySignature();
      MIDIKeySignature ( const MIDIKeySignature &k );
      
      void Reset();
      
      
      bool IsMajor()
      {
        return major;
      }
      
      void SetSharpFlats ( int sf, bool maj=true )
      {
        sharp_flat=sf;
        major=maj;
        Reset();
      }
      
      int GetSharpFlats()
      {
        return sharp_flat;
      }
      
      MIDIAccidentalType GetNoteStatus ( int white_note )
      {
        return state[white_note%7];
      }
      
      
      bool ConvertMIDINote ( int in_note, int *out_note );
      
    protected:
    
      bool ProcessWhiteNote ( int in_note, int *out_note );
      bool ProcessBlackNote ( int in_note, int *out_note );
      
      MIDIAccidentalType state[7];
      bool  use_sharps;
      int  sharp_flat;
      bool  major;
      
      static int sharp_list[7];
      static int flat_list[7];
      
      
  };
}

#endif