mmus2mid.c

/* Emacs style mode select   -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
*  PrBoom: a Doom port merged with LxDoom and LSDLDoom
*  based on BOOM, a modified and improved DOOM engine
*  Copyright (C) 1999 by
*  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
*  Copyright (C) 1999-2000 by
*  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
*  Copyright 2005, 2006 by
*  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
*
* Copyright (C) 2022 by André Guilherme
*  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.
*
* DESCRIPTION:
*  This file supports conversion of MUS format music in memory
*  to MIDI format 1 music in memory.
*
*  The primary routine, mmus2mid, converts a block of memory in MUS format
*  to an Allegro MIDI structure. This supports playing MUS lumps in a wad
*  file with BOOM.
*
*  Another routine, Midi2MIDI, converts a block of memory in MIDI format 1 to
*  an Allegro MIDI structure. This supports playing MIDI lumps in a wad
*  file with BOOM.
*
*  For testing purposes, and to make a utility if desired, if the symbol
*  STANDALONE is defined by uncommenting the definition below, a main
*  routine is compiled that will convert a possibly wildcarded set of MUS
*  files to a similarly named set of MIDI files.
*
*  Much of the code here is thanks to S. Bacquet's source for QMUS2MID.C
*
*-----------------------------------------------------------------------------
*/


#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#ifdef MSDOS /* proff: I don't use allegro in windows */
#include <allegro.h>
#endif /* !MSDOS */
#include "mmus2mid.h"
//#include "lprintf.h"  // jff 08/03/98 - declaration of lprintf

//#define STANDALONE  /* uncomment this to make MMUS2MID.EXE */
#ifndef STANDALONE
#include "m_swap.h"
#include "z_zone.h"
#endif

// some macros to decode mus event bit fields

#define last(e)         ((UBYTE)((e) & 0x80))
#define event_type(e)   ((UBYTE)(((e) & 0x7F) >> 4))
#define channel(e)      ((UBYTE)((e) & 0x0F))

// event types


// static routine prototypes


//
// TWriteByte()
//
// write one byte to the selected MIDItrack, update current position
// if track allocation exceeded, double it
// if track not allocated, initially allocate TRACKBUFFERSIZE bytes
//
// Passed pointer to Allegro MIDI structure, number of the MIDI track being
// written, and the byte to write.
//
// Returns 0 on success, MEMALLOC if a memory allocation error occurs
//
static int TWriteByte(MIDI *mididata, int MIDItrack, UBYTE byte)
{
	ULONG pos ;

	pos = mididata->track[MIDItrack].len;
	if (pos >= (ULONG)track[MIDItrack].alloced)
	{
		track[MIDItrack].alloced =        // double allocation
			track[MIDItrack].alloced?       // or set initial TRACKBUFFERSIZE
			2*track[MIDItrack].alloced :
		TRACKBUFFERSIZE;

		if (!(mididata->track[MIDItrack].data =     // attempt to reallocate
			realloc(mididata->track[MIDItrack].data,
			track[MIDItrack].alloced)))
			return MEMALLOC;
	}
	mididata->track[MIDItrack].data[pos] = byte;
	mididata->track[MIDItrack].len++;
	return 0;
}

//
// TWriteVarLen()
//
// write the ULONG value to tracknum-th track, in midi format, which is
// big endian, 7 bits per byte, with all bytes but the last flagged by
// bit 8 being set, allowing the length to vary.
//
// Passed the Allegro MIDI structure, the track number to write,
// and the ULONG value to encode in midi format there
//
// Returns 0 if sucessful, MEMALLOC if a memory allocation error occurs
//
static int TWriteVarLen(MIDI *mididata, int tracknum, register ULONG value)
{
	register ULONG buffer;

	buffer = value & 0x7f;
	while ((value >>= 7))         // terminates because value unsigned
	{
		buffer <<= 8;               // note first value shifted in has bit 8 clear
		buffer |= 0x80;             // all succeeding values do not
		buffer += (value & 0x7f);
	}
	while (1)                     // write bytes out in opposite order
	{
		if (TWriteByte(mididata, tracknum, (UBYTE)(buffer&0xff))) // insure buffer masked
			return MEMALLOC;

		if (buffer & 0x80)
			buffer >>= 8;
		else                        // terminate on the byte with bit 8 clear
			break;
	}
	return 0;
}

//
// ReadTime()
//
// Read a time value from the MUS buffer, advancing the position in it
//
// A time value is a variable length sequence of 8 bit bytes, with all
// but the last having bit 8 set.
//
// Passed a pointer to the pointer to the MUS buffer
// Returns the integer unsigned long time value there and advances the pointer
//
static ULONG ReadTime(const UBYTE **musptrp)
{
	register ULONG timeval = 0;
	int byte;

	do    // shift each byte read up in the result until a byte with bit 8 clear
	{
		byte = *(*musptrp)++;
		timeval = (timeval << 7) + (byte & 0x7F);
	}
	while(byte & 0x80);

	return timeval;
}

//
// FirstChannelAvailable()
//
// Return the next unassigned MIDI channel number
//
// The assignment for MUS channel 15 is not counted in the caculation, that
// being percussion and always assigned to MIDI channel 9 (base 0).
//
// Passed the array of MIDI channels assigned to MUS channels
// Returns the maximum channel number unassigned unless that is 9 in which
// case 10 is returned.
//
// killough 10/7/98: changed char parameter, return values to int

static int FirstChannelAvailable(int MUS2MIDchannel[])
{
	int i ;
	int max = -1 ;

	// find the largest MIDI channel assigned so far
	for (i = 0; i < 15; i++)
		if (MUS2MIDchannel[i] > max)
			max = MUS2MIDchannel[i];

	return (max == 8 ? 10 : max+1); // skip MIDI channel 9 (percussion)
}

//
// MidiEvent()
//
// Constructs a MIDI event code, and writes it to the current MIDI track
// unless its the same as the last event code and compressio is enabled
// in which case nothing is written.
//
// Passed the Allegro MIDI structure, the midi event code, the current
// MIDI channel number, the current MIDI track number, and whether compression
// (running status) is enabled.
//
// Returns the new event code if successful, 0 if a memory allocation error
//
static UBYTE MidiEvent(MIDI *mididata,UBYTE midicode,UBYTE MIDIchannel,
					   UBYTE MIDItrack,int nocomp)
{
	UBYTE newevent;

	newevent = midicode | MIDIchannel;
	if ((newevent != track[MIDItrack].lastEvt) || nocomp)
	{
		if (TWriteByte(mididata,MIDItrack, newevent))
			return 0;                                    // indicates MEMALLOC error
		track[MIDItrack].lastEvt = newevent;
	}
	return newevent;
}

//
// mmus2mid()
//
// Convert a memory buffer contain MUS data to an Allegro MIDI structure
// with specified time division and compression.
//
// Passed a pointer to the buffer containing MUS data, a pointer to the
// Allegro MIDI structure, the divisions, and a flag whether to compress.
//
// Returns 0 if successful, otherwise an error code (see mmus2mid.h).
//
int mmus2mid(const UBYTE *mus, MIDI *mididata, UWORD division, int nocomp)
{
	UWORD TrackCnt = 0;
	UBYTE evt, MUSchannel, MIDIchannel, MIDItrack=0, NewEvent;
	int i, event, data;
	const UBYTE *musptr;
	size_t muslen;
	static MUSheader MUSh;
	UBYTE MIDIchan2track[MIDI_TRACKS];  // killough 10/7/98: fix too small array
	int MUS2MIDchannel[MIDI_TRACKS];    // killough 10/7/98: fix too small array

	// copy the MUS header from the MUS buffer to the MUSh header structure

	memcpy(&MUSh,mus,sizeof(MUSheader));
	MUSh.ScoreLength = doom_wtohs(MUSh.ScoreLength);
	MUSh.ScoreStart  = doom_wtohs(MUSh.ScoreStart);
	MUSh.channels    = doom_wtohs(MUSh.channels);
	MUSh.SecChannels = doom_wtohs(MUSh.SecChannels);
	MUSh.InstrCnt    = doom_wtohs(MUSh.InstrCnt);

	// check some things and set length of MUS buffer from internal data

	if (!(muslen = MUSh.ScoreLength + MUSh.ScoreStart))
		return MUSDATAMT;     // MUS file empty

	if (MUSh.channels > 15)       // MUSchannels + drum channel > 16
		return TOOMCHAN ;

	musptr = mus+MUSh.ScoreStart; // init musptr to start of score

	for (i = 0; i < MIDI_TRACKS; i++)   // init the track structure's tracks
	{
		MUS2MIDchannel[i] = -1;       // flag for channel not used yet
		track[i].velocity = 64;
		track[i].deltaT = 0;
		track[i].lastEvt = 0;
		//free(mididata->track[i].data);//jff 3/5/98 remove old allocations
		mididata->track[i].data=NULL;
		track[i].alloced = 0;
		mididata->track[i].len = 0;
	}

	if (!division)
		division = 70;

	// allocate the first track which is a special tempo/key track
	// note multiple tracks means midi format 1

	// set the divisions (ticks per quarter note)
	mididata->divisions = division;

	// allocate for midi tempo/key track, allow for end of track
	if (!(mididata->track[0].data =
		realloc(mididata->track[0].data,sizeof(midikey)+sizeof(miditempo)+4)))
		return MEMALLOC;

	// key C major
	memcpy(mididata->track[0].data,midikey,sizeof(midikey));
	// tempo uS/qnote
	memcpy(mididata->track[0].data+sizeof(midikey),miditempo,sizeof(miditempo));
	mididata->track[0].len = sizeof(midikey)+sizeof(miditempo);

	TrackCnt++;   // music tracks start at 1

	// process the MUS events in the MUS buffer

	do
	{
		// get a mus event, decode its type and channel fields

		event = *musptr++;
		if ((evt = event_type(event)) == SCORE_END) //jff 1/23/98 use symbol
			break;  // if end of score event, leave
		MUSchannel = channel(event);

		// if this channel not initialized, do so

		if (MUS2MIDchannel[MUSchannel] == -1)
		{
			// set MIDIchannel and MIDItrack

			MIDIchannel = MUS2MIDchannel[MUSchannel] =
				(MUSchannel == 15 ? 9 : FirstChannelAvailable(MUS2MIDchannel));
			MIDItrack = MIDIchan2track[MIDIchannel] = (UBYTE)TrackCnt++;
		}
		else // channel already allocated as a track, use those values
		{
			MIDIchannel = MUS2MIDchannel[MUSchannel];
			MIDItrack   = MIDIchan2track[MIDIchannel];
		}

		if (TWriteVarLen(mididata, MIDItrack, track[MIDItrack].deltaT))
			return MEMALLOC;
		track[MIDItrack].deltaT = 0;

		switch(evt)
		{
		case RELEASE_NOTE:
			// killough 10/7/98: Fix noise problems by not allowing compression
			if (!(NewEvent=MidiEvent(mididata,0x90,MIDIchannel,MIDItrack,1)))
				return MEMALLOC;

			data = *musptr++;
			if (TWriteByte(mididata, MIDItrack, (UBYTE)(data & 0x7F)))
				return MEMALLOC;
			if (TWriteByte(mididata, MIDItrack, 0))
				return MEMALLOC;
			break;

		case PLAY_NOTE:
			if (!(NewEvent=MidiEvent(mididata,0x90,MIDIchannel,MIDItrack,nocomp)))
				return MEMALLOC;

			data = *musptr++;
			if (TWriteByte(mididata, MIDItrack, (UBYTE)(data & 0x7F)))
				return MEMALLOC;
			if( data & 0x80 )
				track[MIDItrack].velocity = (*musptr++) & 0x7f;
			if (TWriteByte(mididata, MIDItrack, track[MIDItrack].velocity))
				return MEMALLOC;
			break;

		case BEND_NOTE:
			if (!(NewEvent=MidiEvent(mididata,0xE0,MIDIchannel,MIDItrack,nocomp)))
				return MEMALLOC;

			data = *musptr++;
			if (TWriteByte(mididata, MIDItrack, (UBYTE)((data & 1) << 6)))
				return MEMALLOC;
			if (TWriteByte(mididata, MIDItrack, (UBYTE)(data >> 1)))
				return MEMALLOC;
			break;

		case SYS_EVENT:
			if (!(NewEvent=MidiEvent(mididata,0xB0,MIDIchannel,MIDItrack,nocomp)))
				return MEMALLOC;

			data = *musptr++;
			if (data<10 || data>14)
				return BADSYSEVT;

			if (TWriteByte(mididata, MIDItrack, MUS2MIDcontrol[data]))
				return MEMALLOC;
			if (data == 12)
			{
				if (TWriteByte(mididata, MIDItrack, (UBYTE)(MUSh.channels+1)))
					return MEMALLOC;
			}
			else
				if (TWriteByte(mididata, MIDItrack, 0))
					return MEMALLOC;
			break;

		case CNTL_CHANGE:
			data = *musptr++;
			if (data>9)
				return BADCTLCHG;

			if (data)
			{
				if (!(NewEvent=MidiEvent(mididata,0xB0,MIDIchannel,MIDItrack,nocomp)))
					return MEMALLOC;

				if (TWriteByte(mididata, MIDItrack, MUS2MIDcontrol[data]))
					return MEMALLOC;
			}
			else
			{
				if (!(NewEvent=MidiEvent(mididata,0xC0,MIDIchannel,MIDItrack,nocomp)))
					return MEMALLOC;
			}
			data = *musptr++;
			if (TWriteByte(mididata, MIDItrack, (UBYTE)(data & 0x7F)))
				return MEMALLOC;
			break;

		case UNKNOWN_EVENT1:   // mus events 5 and 7
		case UNKNOWN_EVENT2:   // meaning not known
			return BADMUSCTL;

		case SCORE_END:
			break;

		default:
			return BADMUSCTL;   // exit with error
		}
		if (last(event))
		{
			ULONG DeltaTime = ReadTime(&musptr); // killough 10/7/98: make local
			for (i = 0;i < MIDI_TRACKS; i++) //jff 3/13/98 update all tracks
				track[i].deltaT += DeltaTime;  //whether allocated yet or not
		}

	}
	while ((evt != SCORE_END) && ((size_t)(musptr-mus) < muslen));

	if (evt!=SCORE_END)
		return MUSDATACOR;

	// Now add an end of track to each mididata track, correct allocation

	for (i = 0; i < MIDI_TRACKS; i++)
		if (mididata->track[i].len)
		{       // killough 10/7/98: simplify code
			if (TWriteByte(mididata, i, 0x00) || // midi end of track code
				TWriteByte(mididata, i, 0xFF) ||
				TWriteByte(mididata, i, 0x2F) ||
				TWriteByte(mididata, i, 0x00))
				return MEMALLOC;

			// jff 1/23/98 fix failure to set data NULL, len 0 for unused tracks
			// shorten allocation to proper length (important for Allegro)
			if (!(mididata->track[i].data =
				realloc(mididata->track[i].data,mididata->track[i].len)))
				return MEMALLOC;
		}
		else
		{
			free(mididata->track[i].data);
			mididata->track[i].data = NULL;
		}

	return 0;
}

void free_mididata(MIDI *mid)
{
	int i;

	for (i = 0; i < MIDI_TRACKS; i++)
		if (mid->track[i].data)
			free(mid->track[i].data);
}

//
// ReadLength()
//
// Reads the length of a chunk in a midi buffer, advancing the pointer
// 4 bytes, bigendian
//
// Passed a pointer to the pointer to a MIDI buffer
// Returns the chunk length at the pointer position
//
static size_t ReadLength(UBYTE **mid)
{
	UBYTE *midptr = *mid;

	size_t length = (*midptr++)<<24;
	length += (*midptr++)<<16;
	length += (*midptr++)<<8;
	length += *midptr++;
	*mid = midptr;
	return length;
}

//
// MidiToMIDI()
//
// Convert an in-memory copy of a MIDI format 0 or 1 file to
// an Allegro MIDI structure, that is valid or has been zeroed
//
// Passed a pointer to a memory buffer with MIDI format music in it and a
// pointer to an Allegro MIDI structure.
//
// Returns 0 if successful, BADMIDHDR if the buffer is not MIDI format
//
int MidiToMIDI(UBYTE *mid,MIDI *mididata)
{
	int i;
	int ntracks;

	// read the midi header

	if (memcmp(mid,midihdr,4))
		return BADMIDHDR;

	mididata->divisions = (mid[12]<<8)+mid[13];
	ntracks = (mid[10]<<8)+mid[11];

	if (ntracks>=MIDI_TRACKS)
		return BADMIDHDR;

	mid += 4;
	{  // killough 10/7/98: fix mid from being modified twice before sequence pt.
		size_t t = ReadLength(&mid);            // seek past header
		mid += t;
	}

	// now read each track

	for (i=0;i<ntracks;i++)
	{
		while (memcmp(mid,trackhdr,4))    // simply skip non-track data
		{
			mid += 4;
			{
				size_t t = ReadLength(&mid);            // seek past header
				mid += t;  // killough 10/7/98: prevent mid undefined behavior
			}
		}
		mid += 4;
		mididata->track[i].len = ReadLength(&mid);  // get length, move mid past it

		// read a track
		mididata->track[i].data = realloc(mididata->track[i].data,mididata->track[i].len);
		memcpy(mididata->track[i].data,mid,mididata->track[i].len);
		mid += mididata->track[i].len;
	}
	for (;i<MIDI_TRACKS;i++)
		if (mididata->track[i].len)
		{
			free(mididata->track[i].data);
			mididata->track[i].data = NULL;
			mididata->track[i].len = 0;
		}
	return 0;
}

//#ifdef STANDALONE /* this code unused by BOOM provided for future portability */
//                  /* it also provides a MUS to MID file converter*/
// proff: I moved this down, because I need MIDItoMidi


//
// FreeTracks()
//
// Free all track allocations in the MIDI structure
//
// Passed a pointer to an Allegro MIDI structure
// Returns nothing
//
static void FreeTracks(MIDI *mididata)
{
	int i;

	for (i=0; i<MIDI_TRACKS; i++)
	{
		free(mididata->track[i].data);
		mididata->track[i].data = NULL;
		mididata->track[i].len = 0;
	}
}

//
// TWriteLength()
//
// Write the length of a MIDI chunk to a midi buffer. The length is four
// bytes and is written byte-reversed for bigendian. The pointer to the
// midi buffer is advanced.
//
// Passed a pointer to the pointer to a midi buffer, and the length to write
// Returns nothing
//
static void TWriteLength(UBYTE **midiptr,ULONG length)
{
	// proff: Added typecast to avoid warning
	*(*midiptr)++ = (unsigned char)((length>>24)&0xff);
	*(*midiptr)++ = (unsigned char)((length>>16)&0xff);
	*(*midiptr)++ = (unsigned char)((length>>8)&0xff);
	*(*midiptr)++ = (unsigned char)((length)&0xff);
}

//
// MIDIToMidi()
//
// This routine converts an Allegro MIDI structure to a midi 1 format file
// in memory. It is used to support memory MUS -> MIDI conversion
//
// Passed a pointer to an Allegro MIDI structure, a pointer to a pointer to
// a buffer containing midi data, and a pointer to a length return.
// Returns 0 if successful, MEMALLOC if a memory allocation error occurs
//
int MIDIToMidi(MIDI *mididata,UBYTE **mid,int *midlen)
{
	size_t total;
	int i,ntrks;
	UBYTE *midiptr;

	// calculate how long the mid buffer must be, and allocate

	total = sizeof(midihdr);
	for (i=0,ntrks=0;i<MIDI_TRACKS;i++)
		if (mididata->track[i].len)
		{
			total += 8 + mididata->track[i].len; // Track hdr + track length
			ntrks++;
		}
	if ((*mid = malloc(total))==NULL)
		return MEMALLOC;


	// fill in number of tracks and bigendian divisions (ticks/qnote)

	midihdr[10] = 0;
	midihdr[11] = (UBYTE)ntrks;   // set number of tracks in header
	midihdr[12] = (mididata->divisions>>8) & 0x7f;
	midihdr[13] = (mididata->divisions) & 0xff;

	// write the midi header

	midiptr = *mid;
	memcpy(midiptr,midihdr,sizeof(midihdr));
	midiptr += sizeof(midihdr);

	// write the tracks

	for (i=0;i<MIDI_TRACKS;i++)
	{
		if (mididata->track[i].len)
		{
			memcpy(midiptr,trackhdr,sizeof(trackhdr));    // header
			midiptr += sizeof(trackhdr);
			TWriteLength(&midiptr,mididata->track[i].len);  // track length
			// data
			memcpy(midiptr,mididata->track[i].data,mididata->track[i].len);
			midiptr += mididata->track[i].len;
		}
	}

	// return length information

	*midlen = midiptr - *mid;

	return 0;
}

#ifdef STANDALONE /* this code unused by BOOM provided for future portability */
/* it also provides a MUS to MID file converter*/
// proff: I moved this down, because I need MIDItoMidi

//
// main()
//
// Main routine that will convert a globbed set of MUS files to the
// correspondingly named MID files using mmus2mid(). Only compiled
// if the STANDALONE symbol is defined.
//
// Passed the command line arguments, returns 0 if successful
//
int main(int argc,char **argv)
{
	FILE *musst,*midst;
	char musfile[FILENAME_MAX],midfile[FILENAME_MAX];
	MUSheader MUSh;
	UBYTE *mus,*mid;
	static MIDI mididata;
	int err,midlen;
	char *p,*q;
	int i;

	if (argc<2)
	{
		//jff 8/3/98 use logical output routine
		lprintf(LO_INFO,"Usage: MMUS2MID musfile[.MUS]\n");
		lprintf(LO_INFO,"writes musfile.MID as output\n");
		lprintf(LO_INFO,"musfile may contain wildcards\n");
		exit(1);
	}

	for (i=1;i<argc;i++)
	{
		strcpy(musfile,argv[i]);
		p = strrchr(musfile,'.');
		q = strrchr(musfile,'\\');
		if (p && (!q || q<p)) *p='\0';
		strcpy(midfile,musfile);
		strcat(musfile,".MUS");
		strcat(midfile,".MID");

		musst = fopen(musfile,"rb");
		if (musst)
		{
			fread(&MUSh,sizeof(MUSheader),1,musst);
			mus = malloc(MUSh.ScoreLength+MUSh.ScoreStart);
			if (mus)
			{
				fseek(musst,0,SEEK_SET);
				if (!fread(mus,MUSh.ScoreLength+MUSh.ScoreStart,1,musst))
				{
					//jff 8/3/98 use logical output routine
					lprintf(LO_FATAL,"Error reading MUS file\n");
					free(mus);
					exit(1);
				}
				fclose(musst);
			}
			else
			{
				//jff 8/3/98 use logical output routine
				lprintf(LO_FATAL,"Out of memory\n");
				free(mus);
				exit(1);
			}

			err = mmus2mid(mus,&mididata,89,1);
			if (err)
			{
				//jff 8/3/98 use logical output routine
				lprintf(LO_FATAL,"Error converting MUS file to MIDI: %d\n",err);
				exit(1);
			}
			free(mus);

			MIDIToMidi(&mididata,&mid,&midlen);

			midst = fopen(midfile,"wb");
			if (midst)
			{
				if (!fwrite(mid,midlen,1,midst))
				{
					//jff 8/3/98 use logical output routine
					lprintf(LO_FATAL,"Error writing MIDI file\n");
					FreeTracks(&mididata);
					free(mid);
					exit(1);
				}
				fclose(midst);
			}
			else
			{
				//jff 8/3/98 use logical output routine
				lprintf(LO_FATAL,"Can't open MIDI file for output: %s\n", midfile);
				FreeTracks(&mididata);
				free(mid);
				exit(1);
			}
		}
		else
		{
			//jff 8/3/98 use logical output routine
			lprintf(LO_FATAL,"Can't open MUS file for input: %s\n", midfile);
			exit(1);
		}

		//jff 8/3/98 use logical output routine
		lprintf(LO_CONFIRM,"MUS file %s converted to MIDI file %s\n",musfile,midfile);
		FreeTracks(&mididata);
		free(mid);
	}
	exit(0);
}

#endif