root/trunk/libjdkmidi/trunk/include/jdkmidi/fileread.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_FILEREAD_H
#define JDKMIDI_FILEREAD_H

#include "jdkmidi/midi.h"
#include "jdkmidi/msg.h"
#include "jdkmidi/sysex.h"
#include "jdkmidi/file.h"

namespace jdkmidi
{
  class MIDIFileReadStream;
  class MIDIFileReadStreamFile;
  class MIDIFileEvents;
  class MIDIFileRead;
  
  
  class MIDIFileReadStream
  {
    public:
      MIDIFileReadStream()
      {
      }
      
      virtual ~MIDIFileReadStream()
      {
      }
      
      virtual int ReadChar() = 0;
  };
  
  class MIDIFileReadStreamFile : public MIDIFileReadStream
  {
    public:
      explicit MIDIFileReadStreamFile ( const char *fname )
      {
        f=fopen ( fname, "rb" );
      }
      
      explicit MIDIFileReadStreamFile ( FILE *f_ ) : f ( f_ )
      {
      }
      
      virtual ~MIDIFileReadStreamFile()
      {
        if ( f )
        {
          fclose ( f );
        }
        
      }
      
      
      virtual int ReadChar()
      {
        int r=-1;
        
        if ( f && !feof ( f ) && !ferror ( f ) )
        {
          r=fgetc ( f );
        }
        
        return r;
      }
      
      
    private:
      FILE *f;
  };
  
  class MIDIFileEvents : protected MIDIFile
  {
    public:
      MIDIFileEvents()
      {
      }
      
      virtual ~MIDIFileEvents()
      {
      }
      
      
//
// The possible events in a MIDI Files
//

      virtual void    mf_system_mode ( const MIDITimedMessage &msg );
      virtual void    mf_note_on ( const MIDITimedMessage &msg );
      virtual void    mf_note_off ( const  MIDITimedMessage &msg );
      virtual void    mf_poly_after ( const MIDITimedMessage &msg );
      virtual void    mf_bender ( const MIDITimedMessage &msg );
      virtual void    mf_program ( const MIDITimedMessage &msg );
      virtual void    mf_chan_after ( const MIDITimedMessage &msg );
      virtual void    mf_control ( const MIDITimedMessage &msg );
      virtual void    mf_sysex ( MIDIClockTime time, const MIDISystemExclusive &ex );
      
      virtual void    mf_arbitrary ( MIDIClockTime time, int len, unsigned char *data );
      virtual void    mf_metamisc ( MIDIClockTime time, int, int, unsigned char *  );
      virtual void    mf_seqnum ( MIDIClockTime time, int );
      virtual void    mf_smpte ( MIDIClockTime time, int, int, int, int, int );
      virtual void    mf_timesig ( MIDIClockTime time, int, int, int, int );
      virtual void    mf_tempo ( MIDIClockTime time, unsigned long tempo );
      virtual void    mf_keysig ( MIDIClockTime time, int, int );
      virtual void    mf_sqspecific ( MIDIClockTime time, int, unsigned char * );
      virtual void    mf_text ( MIDIClockTime time, int, int, unsigned char * );
      virtual void    mf_eot ( MIDIClockTime time );
      
//
// the following methods are to be overridden for your specific purpose
//

      virtual void    mf_error ( const char * );
      
      virtual void    mf_starttrack ( int trk );
      virtual void    mf_endtrack ( int trk );
      virtual void    mf_header ( int, int, int );
      
//
// Higher level dispatch functions
//
      virtual void UpdateTime ( MIDIClockTime delta_time );
      virtual void    MetaEvent ( MIDIClockTime time, int type, int len, unsigned char *buf );
      virtual void    ChanMessage ( const MIDITimedMessage &msg );
      
  };
  
  class MIDIFileRead : protected MIDIFile
  {
    public:
    
      MIDIFileRead (
        MIDIFileReadStream *input_stream_,
        MIDIFileEvents *event_handler_,
        unsigned long max_msg_len=8192
      );
      virtual         ~MIDIFileRead();
      
      virtual bool    Parse();
      
      int  GetFormat()
      {
        return header_format;
      }
      int  GetNumberTracks()
      {
        return header_ntrks;
      }
      int  GetDivision()
      {
        return header_division;
      }
      
    protected:
    
      virtual int  ReadHeader();
      
      virtual void    mf_error ( const char * );
      
    protected:
      int  no_merge;
      MIDIClockTime   cur_time;
      int  skip_init;
      unsigned long   to_be_read;
      int   cur_track;
      int   abort_parse;
      
      unsigned char   *the_msg;
      int  max_msg_len;
      int    msg_index;
      
    private:
      unsigned long   ReadVariableNum();
      unsigned long   Read32Bit();
      int   Read16Bit();
      
      void    ReadTrack();
      
      void    MsgAdd ( int );
      void    MsgInit();
      
      int   EGetC();
      
      int   ReadMT ( unsigned long, int );
      void    BadByte ( int );
      
      void FormChanMessage ( unsigned char st, unsigned char b1, unsigned char b2 );
      
      
      int  header_format;
      int  header_ntrks;
      int  header_division;
      
      MIDIFileReadStream *input_stream;
      MIDIFileEvents *event_handler;
  };
}

#endif