smf.h

一个很好的c++ midi解码算法,不依赖于任何平台.

/*
 *  srgplay - MIDI file player
 *  Copyright (C) 1998,1999 SAKAI Katsuya
 *
 *  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
 */

#ifndef __SMF_FORMAT_H_
#define __SMF_FORMAT_H_

#define META_EVENT       0xFF
#define META_TEMPO       0x51
#define META_TRACKEND    0x2F
#define META_PORT_CHANGE 0x21

class SMF_Chunk {
public:
  SMF_Chunk(){Index=0; Data=0;}
  ~SMF_Chunk(){if(Data!=0) delete Data; Data=0;}
  char Type[5];
  u_long Length;
  u_char *Data;
protected:
  u_long ReadVarLen();
  u_long ReadLen(int);  
  u_long Index;
};


class SMF_Header : public SMF_Chunk {
public:
  u_char Format;
  long NumOfTrack;
  long Timebase;
};


class SMF_Track : public SMF_Chunk {
public:
  void init();
  int playaEvent();
  u_long tick(){ return Tick; }

  long Number;
protected:
  SMF_Header *Header;

  u_char Port;
  u_char LocalLastStatus[16];
  u_long Tick;

};

#endif