/*
  ZynAddSubFX - a software synthesizer
 
  MIDIFile.h - MIDI file loader
  Copyright (C) 2003-2005 Nasca Octavian Paul
  Author: Nasca Octavian Paul

  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License 
  as published by the Free Software Foundation.

  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 (version 2) for more details.

  You should have received a copy of the GNU General Public License (version 2)
  along with this program; if not, write to the Free Software Foundation,
  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

*/

#ifndef MIDIFILE_H
#define MIDIFILE_H

#include "../globals.h"
#include "MIDIEvents.h"

class MIDIFile{
    public:
	MIDIFile();
	~MIDIFile();
	
	//returns -1 if there is an error, otherwise 0
	int loadfile(char *filename);
	
	//returns -1 if there is an error, otherwise 0
	int parsemidifile(MIDIEvents *me_);
	
    private:
	MIDIEvents *me;	
    
	unsigned char *midifile;
	int midifilesize,midifilek;
	bool midieof;

	//returns -1 if there is an error, otherwise 0
	int parsetrack(int ntrack);
    
	void parsenoteoff(char ntrack,char chan,unsigned int dt);
	void parsenoteon(char ntrack,char chan,unsigned int dt);
	void parsecontrolchange(char ntrack,char chan,unsigned int dt);
	void parsepitchwheel(char ntrack,char chan, unsigned int dt);
	void parsemetaevent(unsigned char mtype,unsigned char mlength);

	void add_dt(char ntrack, unsigned int dt);
	
	void clearmidifile();

	//convert the delta-time to internal format 
	unsigned int convertdt(unsigned int dt);	
	
	/* Low Level MIDIfile functions */
	
	//get a byte from the midifile
	unsigned char getbyte();

	//peek the current byte from the midifile
	unsigned char peekbyte();
	
	//get a set of 4 bytes from the midifile
	unsigned int getint32();
	
	//get a word of 2 bytes from the midifile
	unsigned short int getint16();

	//read a variable length quantity
	unsigned int getvarint32();	

	//skip some bytes
	void skipnbytes(int n);

	struct {
	    double tick;//how many seconds one tick has
	    
	}data;
	
};

#endif