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midicomp.c
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midicomp.c
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/***
# midicomp
A MIDI Compiler - convert SMF MIDI files to and from plain text.
***/
char *usage = "\
midicomp v0.0.6 20110727 [email protected] (AGPLv3) \n\
\n\
http://github.com/markc/midicomp \n\
\n\
Command line argument usage: \n\
\n\
-d --debug send any debug output to stderr \n\
-v --verbose output in columns with notes on \n\
-c --compile compile ascii input into SMF \n\
-n --note note on/off value as note|octave \n\
-t --time use absolute time instead of ticks \n\
-i --inc write/read incremental time or tick values to/from ascii file \n\
-fN --fold=N fold sysex data at N columns \n\
\n\
To translate a SMF file to plain ascii format: \n\
\n\
midicomp some.mid # to view as plain text \n\
midicomp some.mid > some.asc # to create a text version \n\
\n\
To translate a plain ascii formatted file to SMF: \n\
\n\
midicomp -c some.asc some.mid # input and output filenames \n\
midicomp -c some.mid < some.asc # input from stdin with one arg \n\
\n\
midicomp some.mid | somefilter | midicomp -c some2.mid \n";
#include <malloc.h>
#include <setjmp.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include "midicomp.h"
int main(int argc, char **argv) {
FILE *efopen();
Mf_nomerge = 1;
opterr = 0;
int compile = 0;
int c;
struct option long_options[] = {
{"debug", no_argument, 0, 'd'},
{"verbose", no_argument, 0, 'v'},
{"compile", no_argument, 0, 'c'},
{"note", no_argument, 0, 'n'},
{"time", no_argument, 0, 't'},
{"inc", no_argument, 0, 'i'},
{"fold", required_argument, 0, 'f'},
{0, 0, 0, 0}
};
int option_index = 0;
while ((c = getopt_long(argc, argv, "dvcntif:", long_options, &option_index)) != -1) {
switch (c) {
case 0:
if (long_options[option_index].flag != 0)
break;
case 'd':
dbg++;
break;
case 'f':
fold = atoi(optarg);
fprintf(stderr, "fold=%d\n", fold);
break;
case 'm':
Mf_nomerge = 0;
break;
case 'n':
notes++;
break;
case 't':
times++;
break;
case 'i':
incs++;
break;
case 'c':
compile++;
break;
case 'v':
verbose++;
notes++;
break;
case 'h':
default:
fprintf(stderr, "%s\n", usage);
return 1;
}
}
if (dbg) fprintf(stderr, "main()\n");
TrkNr = 0;
Measure = 4;
Beat = 96;
Clicks = 96;
M0 = 0;
T0 = 0;
if (compile) {
char *infile;
char *outfile;
if (optind < argc) {
if (optind+1 < argc) {
yyin = efopen(argv[optind], "r");
infile = argv[optind];
F = efopen(argv[optind+1], "wb");
outfile = argv[optind+1];
} else {
yyin = stdin;
infile = "stdin";
F = efopen(argv[optind], "wb");
outfile = argv[optind];
}
} else {
yyin = stdin;
infile = "stdin";
#ifdef SETMODE
setmode (fileno(stdout), O_BINARY);
F = stdout;
#else
F = fdopen (fileno(stdout), "wb");
#endif
outfile = "stdout";
}
if (dbg) fprintf(stderr, "Compiling %s to %s\n", infile, outfile);
Mf_putc = fileputc;
Mf_wtrack = mywritetrack;
translate();
fclose(F);
fclose(yyin);
} else {
if (verbose) {
Onmsg = "On ch=%-2d note=%-3s vol=%-3d\n";
Offmsg = "Off ch=%-2d note=%-3s vol=%-3d\n";
PoPrmsg = "PolyPr ch=%-2d note=%-3s val=%-3d\n";
Parmsg = "Param ch=%-2d con=%-3d val=%-3d\n";
Pbmsg = "Pb ch=%-2d val=%-3d\n";
PrChmsg = "ProgCh ch=%-2d prog=%-3d\n";
ChPrmsg = "ChanPr ch=%-2d val=%-3d\n";
}
if (optind < argc)
F = efopen(argv[optind], "rb");
else
F = fdopen(fileno(stdin), "rb");
initfuncs();
Mf_getc = filegetc;
mfread();
if (ferror(F)) error ("Output file error");
fclose(F);
}
}
void mfread() {
if (Mf_getc == NULLFUNC)
mferror("mfread() called without setting Mf_getc");
readheader();
while(readtrack()) ;
}
static int readmt(char *s) {
int n = 0;
char *p = s;
int c;
while ( n++<4 && (c=(*Mf_getc)()) != EOF ) {
if ( c != *p++ ) {
char buff[32];
(void) strcpy(buff, "expecting ");
(void) strcat(buff, s);
mferror(buff);
}
}
return(c);
}
static int egetc() {
int c = (*Mf_getc)();
if ( c == EOF )
mferror("premature EOF");
Mf_toberead--;
return(c);
}
static void readheader() {
int format, ntrks, division;
if (readmt("MThd") == EOF) return;
Mf_toberead = read32bit();
format = read16bit();
ntrks = read16bit();
division = read16bit();
if (Mf_header) (*Mf_header)(format, ntrks, division);
while(Mf_toberead > 0) (void) egetc();
}
static int readtrack() {
long lookfor;
int c, c1, type;
int sysexcontinue = 0;
int running = 0;
int status = 0;
int needed;
static int chantype[] = {
0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 2, 1, 1, 2, 0
};
if (readmt("MTrk") == EOF) return(0);
Mf_toberead = read32bit();
Mf_currtime = 0;
old_Mf_currtime = 0;
if (Mf_starttrack) (*Mf_starttrack)();
while (Mf_toberead > 0) {
old_Mf_currtime=Mf_currtime;
Mf_currtime += readvarinum();
c = egetc();
if (sysexcontinue && c != 0xf7)
mferror("didn't find expected continuation of a sysex");
if ((c & 0x80) == 0) {
if (status == 0) mferror("unexpected running status");
running = 1;
c1 = c;
c = status;
} else if (c < 0xf0) {
status = c;
running = 0;
}
needed = chantype[ (c>>4) & 0xf ];
if (needed) {
if (!running) c1 = egetc();
chanmessage(status, c1, (needed>1) ? egetc() : 0 );
continue;
}
switch(c) {
case 0xff:
type = egetc();
lookfor = Mf_toberead - readvarinum();
msginit();
while(Mf_toberead >= lookfor) msgadd(egetc());
metaevent(type);
break;
case 0xf0:
lookfor = Mf_toberead - readvarinum();
msginit();
msgadd(0xf0);
while(Mf_toberead >= lookfor) msgadd(c=egetc());
if (c == 0xf7 || Mf_nomerge == 0)
sysex();
else
sysexcontinue = 1;
break;
case 0xf7:
lookfor = Mf_toberead - readvarinum();
if (! sysexcontinue) msginit();
while (Mf_toberead >= lookfor) msgadd(c=egetc());
if (! sysexcontinue) {
if (Mf_arbitrary) (*Mf_arbitrary)(msgleng(), msg());
} else if (c == 0xf7) {
sysex();
sysexcontinue = 0;
}
break;
default:
badbyte(c);
break;
}
}
if ( Mf_endtrack ) (*Mf_endtrack)();
return(1);
}
static void badbyte(int c) {
char buff[32];
(void) sprintf(buff, "unexpected byte: 0x%02x", c);
mferror(buff);
}
static int metaevent(int type) {
int leng = msgleng();
char *m = msg();
switch (type) {
case 0x00:
if (Mf_seqnum) (*Mf_seqnum)(to16bit(m[0], m[1]));
break;
case 0x01: /* Text event */
case 0x02: /* Copyright notice */
case 0x03: /* Sequence/Track name */
case 0x04: /* Instrument name */
case 0x05: /* Lyric */
case 0x06: /* Marker */
case 0x07: /* Cue point */
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0c:
case 0x0d:
case 0x0e:
case 0x0f:
if (Mf_text) (*Mf_text)(type, leng, m);
break;
case 0x2f:
if (Mf_eot) (*Mf_eot)();
break;
case 0x51:
if (Mf_tempo) (*Mf_tempo)(to32bit(0, m[0], m[1], m[2]));
break;
case 0x54:
if (Mf_smpte)
(*Mf_smpte)(m[0], m[1], m[2], m[3], m[4]);
break;
case 0x58:
if (Mf_timesig)
(*Mf_timesig)(m[0], m[1], m[2], m[3]);
break;
case 0x59:
if (Mf_keysig) (*Mf_keysig)(m[0], m[1]);
break;
case 0x7f:
if (Mf_sqspecific) (*Mf_sqspecific)(leng, m);
break;
default:
if (Mf_metamisc) (*Mf_metamisc)(type, leng, m);
}
}
static int sysex() {
if (Mf_sysex) (*Mf_sysex)(msgleng(), msg());
}
static int chanmessage(int status, int c1, int c2) {
int chan = status & 0xf;
switch(status & 0xf0) {
case 0x80: if (Mf_off) (*Mf_off)(chan, c1, c2); break;
case 0x90: if (Mf_on) (*Mf_on)(chan, c1, c2); break;
case 0xa0: if (Mf_pressure) (*Mf_pressure)(chan, c1, c2); break;
case 0xb0: if (Mf_parameter) (*Mf_parameter)(chan, c1, c2); break;
case 0xe0: if (Mf_pitchbend) (*Mf_pitchbend)(chan, c1, c2); break;
case 0xc0: if (Mf_program) (*Mf_program)(chan, c1); break;
case 0xd0: if (Mf_chanpressure) (*Mf_chanpressure)(chan, c1); break;
}
}
static long readvarinum() {
long value;
int c;
c = egetc();
value = c;
if (c & 0x80) {
value &= 0x7f;
do {
c = egetc();
value = (value << 7) + (c & 0x7f);
} while (c & 0x80);
}
return (value);
}
static long to32bit(int c1, int c2, int c3, int c4) {
long value = 0L;
value = (c1 & 0xff);
value = (value<<8) + (c2 & 0xff);
value = (value<<8) + (c3 & 0xff);
value = (value<<8) + (c4 & 0xff);
return (value);
}
static int to16bit(int c1, int c2) {
return ((c1 & 0xff ) << 8) + (c2 & 0xff);
}
static long read32bit() {
int c1, c2, c3, c4;
c1 = egetc();
c2 = egetc();
c3 = egetc();
c4 = egetc();
return to32bit(c1, c2, c3, c4);
}
static int read16bit() {
int c1, c2;
c1 = egetc();
c2 = egetc();
return to16bit(c1, c2);
}
void mferror(char *s) {
if (Mf_error) (*Mf_error)(s);
exit(1);
}
static void msginit() {
Msgindex = 0;
}
static char * msg() {
return(Msgbuff);
}
static int msgleng() {
return(Msgindex);
}
static void msgadd(int c) {
if (Msgindex >= Msgsize) biggermsg();
Msgbuff[Msgindex++] = c;
}
static void biggermsg() {
char *newmess;
char *oldmess = Msgbuff;
int oldleng = Msgsize;
Msgsize += MSGINCREMENT;
newmess = (char *) malloc((unsigned)(sizeof(char)*Msgsize));
if (newmess == NULL) mferror("malloc error!");
if (oldmess != NULL) {
register char *p = newmess;
register char *q = oldmess;
register char *endq = &oldmess[oldleng];
for( ; q!=endq ; p++, q++ ) *p = *q;
free(oldmess);
}
Msgbuff = newmess;
}
void mfwrite(int format, int ntracks, int division, FILE *fp) {
int i;
void mf_w_track_chunk(), mf_w_header_chunk();
if (Mf_putc == NULLFUNC)
mferror("mfmf_write() called without setting Mf_putc");
if (Mf_wtrack == NULLFUNC)
mferror("mfmf_write() called without setting Mf_mf_writetrack");
mf_w_header_chunk(format, ntracks, division);
if (format == 1 && ( Mf_wtempotrack )) {
mf_w_track_chunk(-1, fp, Mf_wtempotrack);
ntracks--;
}
for(i = 0; i < ntracks; i++)
mf_w_track_chunk(i, fp, Mf_wtrack);
}
void mf_w_track_chunk(which_track, fp, wtrack)
int which_track;
FILE *fp;
int (*wtrack)();
{
unsigned long trkhdr, trklength;
long offset, place_marker;
void write16bit(), write32bit();
trkhdr = MTrk;
trklength = 0;
offset = ftell(fp);
write32bit(trkhdr);
write32bit(trklength);
Mf_numbyteswritten = 0L;
laststat = 0;
(*wtrack)(which_track);
if (laststat != meta_event || lastmeta != end_of_track) {
eputc(0);
eputc(meta_event);
eputc(end_of_track);
eputc(0);
}
laststat = 0;
place_marker = ftell(fp);
if (fseek(fp, offset, 0) < 0)
mferror("error seeking during final stage of write");
trklength = Mf_numbyteswritten;
write32bit(trkhdr);
write32bit(trklength);
fseek(fp, place_marker, 0);
}
void mf_w_header_chunk(int format, int ntracks, int division) {
unsigned long ident, length;
void write16bit(), write32bit();
ident = MThd;
length = 6;
write32bit(ident);
write32bit(length);
write16bit(format);
write16bit(ntracks);
write16bit(division);
}
int mf_w_midi_event(
unsigned long delta_time,
unsigned int type,
unsigned int chan,
unsigned char *data,
unsigned long size) {
int i;
unsigned char c;
WriteVarLen(delta_time);
c = type | chan;
if(chan > 15)
perror("error: MIDI channel greater than 16\n");
if (!Mf_RunStat || laststat != c)
eputc(c);
laststat = c;
for(i = 0; i < size; i++)
eputc(data[i]);
return(size);
}
int mf_w_meta_event(
unsigned long delta_time,
unsigned int type,
unsigned char *data,
unsigned long size) {
int i;
WriteVarLen(delta_time);
eputc(meta_event);
laststat = meta_event;
eputc(type);
lastmeta = type;
WriteVarLen(size);
for(i = 0; i < size; i++) {
if (eputc(data[i]) != data[i]) return(-1);
}
return(size);
}
int mf_w_sysex_event(
unsigned long delta_time,
unsigned char *data,
unsigned long size) {
int i;
WriteVarLen(delta_time);
eputc(*data);
laststat = 0;
WriteVarLen(size-1);
for(i = 1; i < size; i++) {
if(eputc(data[i]) != data[i]) return(-1);
}
return(size);
}
void mf_w_tempo(unsigned long delta_time, unsigned long tempo) {
WriteVarLen(delta_time);
eputc(meta_event);
laststat = meta_event;
eputc(set_tempo);
eputc(3);
eputc((unsigned)(0xff & (tempo >> 16)));
eputc((unsigned)(0xff & (tempo >> 8)));
eputc((unsigned)(0xff & tempo));
}
unsigned long mf_sec2ticks(float secs, int division, unsigned int tempo) {
return (long)(((secs * 1000.0) / 4.0 * division) / tempo);
}
void WriteVarLen(unsigned long value) {
unsigned long buffer;
buffer = value & 0x7f;
while((value >>= 7) > 0) {
buffer <<= 8;
buffer |= 0x80;
buffer += (value & 0x7f);
}
while(1) {
eputc((unsigned)(buffer & 0xff));
if (buffer & 0x80)
buffer >>= 8;
else
return;
}
}
float mf_ticks2sec(int ticks, unsigned int division, unsigned long tempo) {
float smpte_format, smpte_resolution;
if (division > 0) {
return((float)(((float) (ticks)*(float)(tempo))/
((float)(division)*1000000.0)));
} else {
smpte_format = upperbyte(division);
smpte_resolution = lowerbyte(division);
return(float)((float) ticks/(smpte_format*smpte_resolution*1000000.0));
}
}
void write32bit(unsigned long data) {
eputc((unsigned)((data >> 24) & 0xff));
eputc((unsigned)((data >> 16) & 0xff));
eputc((unsigned)((data >> 8 ) & 0xff));
eputc((unsigned)(data & 0xff));
}
void write16bit(int data) {
eputc((unsigned)((data & 0xff00) >> 8));
eputc((unsigned)(data & 0xff));
}
int eputc(unsigned char c) {
int return_val;
if ((Mf_putc) == NULLFUNC) {
mferror("Mf_putc undefined");
return(-1);
}
return_val = (*Mf_putc)(c);
if (return_val == EOF) mferror("error writing");
Mf_numbyteswritten++;
return(return_val);
}
char *mknote(int pitch) {
static char * Notes [] =
{"c", "c#", "d", "d#", "e", "f", "f#", "g", "g#", "a", "a#", "b"};
static char buf[5];
if ( notes )
sprintf (buf, "%s%d", Notes[pitch % 12], pitch/12);
else
sprintf (buf, "%d", pitch);
return buf;
}
void myheader(int format, int ntrks, int division) {
if (division & 0x8000) {
times = 0;
printf("MFile %d %d %d %d\n",
format, ntrks, -((-(division>>8))&0xff), division&0xff);
} else {
printf("MFile %d %d %d\n", format, ntrks, division);
}
if (format > 2) {
fprintf(stderr, "Can't deal with format %d files\n", format);
exit (1);
}
Beat = Clicks = division;
TrksToDo = ntrks;
}
void mytrstart() {
printf("MTrk\n");
TrkNr ++;
}
void mytrend() {
printf("TrkEnd\n");
--TrksToDo;
}
void mynon(int chan, int pitch, int vol) {
prtime();
printf(Onmsg, chan+1, mknote(pitch), vol);
}
void mynoff(int chan, int pitch, int vol) {
prtime();
printf(Offmsg, chan+1, mknote(pitch), vol);
}
void mypressure(int chan, int pitch, int press) {
prtime();
printf(PoPrmsg, chan+1, mknote(pitch), press);
}
void myparameter(int chan, int control, int value) {
prtime();
printf(Parmsg, chan+1, control, value);
}
void mypitchbend(int chan, int lsb, int msb) {
prtime();
printf(Pbmsg, chan+1, 128*msb+lsb);
}
void myprogram(int chan, int program) {
prtime();
printf(PrChmsg, chan+1, program);
}
void mychanpressure(int chan, int press) {
prtime();
printf(ChPrmsg, chan+1, press);
}
void mysysex(int leng, char *mess) {
prtime();
printf("SysEx");
prhex (mess, leng);
}
void mymmisc(int type, int leng, char *mess) {
prtime();
printf("Meta 0x%02x", type);
prhex(mess, leng);
}
void mymspecial(int leng, char *mess) {
prtime();
printf("SeqSpec");
prhex(mess, leng);
}
void mymtext(int type, int leng, char *mess) {
static char *ttype[] = {
NULL,
"Text", "Copyright", "TrkName", "InstrName", "Lyric", "Marker", "Cue", "Unrec"
};
int unrecognized = (sizeof(ttype)/sizeof(char *)) - 1;
prtime();
if (type < 1 || type > unrecognized)
printf("Meta 0x%02x ", type);
else if (type == 3 && TrkNr == 1)
printf("Meta SeqName ");
else
printf("Meta %s ", ttype[type]);
prtext (mess, leng);
}
void mymseq(int num) {
prtime();
printf("SeqNr %d\n", num);
}
void mymeot() {
prtime();
printf("Meta TrkEnd\n");
}
void mykeysig(int sf, int mi) {
prtime();
printf("KeySig %d %s\n", (sf > 127 ? sf-256 : sf), (mi ? "minor" : "major"));
}
void mytempo(long tempo) {
prtime();
printf("Tempo %ld\n", tempo);
}
void mytimesig(int nn, int dd, int cc, int bb) {
int denom = 1;
while (dd-- > 0) denom *= 2;
prtime();
printf("TimeSig %d/%d %d %d\n", nn, denom, cc, bb);
M0 += (Mf_currtime-T0)/(Beat*Measure);
T0 = Mf_currtime;
Measure = nn;
Beat = 4 * Clicks / denom;
}
void mysmpte(int hr, int mn, int se, int fr, int ff) {
prtime();
printf("SMPTE %d %d %d %d %d\n", hr, mn, se, fr, ff);
}
void myarbitrary(int leng, char *mess) {
prtime();
printf("Arb", leng);
prhex(mess, leng);
}
void prtime() {
if (times)
{
if (incs)
{
long m = (Mf_currtime-old_Mf_currtime)/Beat;
if (verbose)
printf("%03ld:%02ld:%03ld ",
m/Measure+M0,m%Measure,(Mf_currtime-old_Mf_currtime)%Beat);
else
printf("%ld:%ld:%ld ",
m/Measure+M0,m%Measure,(Mf_currtime-old_Mf_currtime)%Beat);
}
else
{
long m = (Mf_currtime-T0)/Beat;
if (verbose)
printf("%03ld:%02ld:%03ld ",
m/Measure+M0,m%Measure,(Mf_currtime-T0)%Beat);
else
printf("%ld:%ld:%ld ",
m/Measure+M0,m%Measure,(Mf_currtime-T0)%Beat);
}
}
else
{
if (incs)
{
if (verbose)
printf("%-10ld ", Mf_currtime - old_Mf_currtime);
else
printf("%ld ", Mf_currtime - old_Mf_currtime);
}
else
{
if (verbose)
printf("%-10ld ", Mf_currtime);
else
printf("%ld ", Mf_currtime);
}
}
}
void prtext(unsigned char *p, int leng) {
int n, c;
int pos = 25;
printf("\"");
for ( n=0; n<leng; n++ ) {
c = *p++;
if (fold && pos >= fold) {
printf ("\\\n\t");
pos = 13; /* tab + \xab + \ */
if (c == ' ' || c == '\t') {
putchar ('\\');
++pos;
}
}
switch (c) {
case '\\':
case '"':
printf ("\\%c", c);
pos += 2;
break;
case '\r':
printf ("\\r");
pos += 2;
break;
case '\n':
printf ("\\n");
pos += 2;
break;
case '\0':
printf ("\\0");
pos += 2;
break;
default:
if (isprint(c)) {
putchar(c);
++pos;
} else {
printf("\\x%02x" , c);
pos += 4;
}
}
}
printf("\"\n");
}
void prhex(unsigned char *p, int leng) {
int n;
int pos = 25;
for(n = 0; n < leng; n++, p++) {
if (fold && pos >= fold) {
printf ("\\\n\t%02x", *p);
pos = 14;
} else {
printf(" %02x", *p);
pos += 3;
}
}
printf("\n");
}
myerror(char *s) {
if (TrksToDo <= 0)
fprintf(stderr, "Error: Garbage at end\n", s);
else
fprintf(stderr, "Error: %s\n", s);
}
void initfuncs() {
Mf_error = myerror;
Mf_header = myheader;
Mf_starttrack = mytrstart;
Mf_endtrack = mytrend;
Mf_on = mynon;
Mf_off = mynoff;
Mf_pressure = mypressure;
Mf_parameter = myparameter;
Mf_pitchbend = mypitchbend;
Mf_program = myprogram;
Mf_chanpressure = mychanpressure;
Mf_sysex = mysysex;
Mf_metamisc = mymmisc;
Mf_seqnum = mymseq;
Mf_eot = mymeot;
Mf_timesig = mytimesig;
Mf_smpte = mysmpte;
Mf_tempo = mytempo;
Mf_keysig = mykeysig;
Mf_sqspecific = mymspecial;
Mf_text = mymtext;
Mf_arbitrary = myarbitrary;
}
void prs_error(char *s) {
int c;
int count;
int ln = (eol_seen? lineno-1 : lineno);