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spkrnote.h

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#ifndef __SPKRNOTE_H_INCLUDED__
#define __SPKRNOTE_H_INCLUDED__

// $Id

//**********************************************************************
//                                                                     *
//    Description:   Implementation using PC speaker to produce sound  *
//                   for a single note.                                *
//                                                                     *
//    Author:        Chris White (whitecf@bcs.org.uk)                  *
//                                                                     *
//    Copyright (C) 2003  Monitor Computing Services Ltd.              *
//                                                                     *
//    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 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 (http://www.gnu.org/copyleft/gpl.html) along with this   *
//    program; if not, write to:                                       *
//       The Free Software Foundation Inc.,                            *
//       59 Temple Place - Suite 330,                                  *
//       Boston, MA  02111-1307,                                       *
//       USA.                                                          *
//                                                                     *
//**********************************************************************
//                                                                     *
//    Notes:                                                           *
//                                                                     *
//**********************************************************************


#include <note.h>


namespace Monitor {
namespace Utility {

class SpeakerNote : public Note
{
public:
    typedef int    Frequency;
    typedef int    Length;

    SpeakerNote(Frequency    newFrequency, Length    newLength);

    virtual ~SpeakerNote();

    virtual void
    sound() const
    throw (Note::Busy);

    Frequency
    getFrequency() const;

    void
    setFrequency(Frequency    newFrequency);

    Length
    getLength() const;
    
    void
    setLength(Length    newLength);


private:
    void
    endSound() const;

    static int    busy;
    
    Frequency     frequency;

    Length        length;
};

};  // namespace Utility
};  // namespace Monitor

#endif // __SPKRNOTE_H_INCLUDED__

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