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NetBSD/usr.bin/midiplay/midiplay.c

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/* $NetBSD: midiplay.c,v 1.7 1998/10/20 20:22:09 augustss Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Author: Lennart Augustsson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <err.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/midiio.h>
#define DEVMUSIC "/dev/music"
struct track {
u_char *start, *end;
u_long curtime;
u_char status;
};
#define MIDI_META 0xff
#define META_SEQNO 0x00
#define META_TEXT 0x01
#define META_COPYRIGHT 0x02
#define META_TRACK 0x03
#define META_INSTRUMENT 0x04
#define META_LYRIC 0x05
#define META_MARKER 0x06
#define META_CUE 0x07
#define META_CHPREFIX 0x20
#define META_EOT 0x2f
#define META_SET_TEMPO 0x51
#define META_KEY 0x59
#define META_SMPTE 0x54
#define META_TIMESIGN 0x58
char *metanames[] = {
"", "Text", "Copyright", "Track", "Instrument",
"Lyric", "Marker", "Cue",
};
static int midi_lengths[] = { 2,2,2,2,1,1,2,0 };
/* Number of bytes in a MIDI command */
#define MIDI_LENGTH(d) (midi_lengths[((d) >> 4) & 7])
void usage __P((void));
void send_event __P((seq_event_rec *));
void dometa __P((u_int, u_char *, u_int));
void midireset __P((void));
void send_sysex __P((u_char *, u_int));
u_long getvar __P((struct track *));
void playfile __P((FILE *, char *));
void playdata __P((u_char *, u_int, char *));
int main __P((int argc, char **argv));
extern char *__progname;
#define P(c) 1,0x90,c,0x7f,4,0x80,c,0
#define PL(c) 1,0x90,c,0x7f,8,0x80,c,0
#define C 0x3c
#define D 0x3e
#define E 0x40
#define F 0x41
u_char sample[] = {
'M','T','h','d', 0,0,0,6, 0,1, 0,1, 0,8,
'M','T','r','k', 0,0,0,4+13*8,
P(C), P(C), P(C), P(E), P(D), P(D), P(D),
P(F), P(E), P(E), P(D), P(D), PL(C),
0, 0xff, 0x2f, 0
};
#undef P
#undef PL
#undef C
#undef D
#undef E
#undef F
#define MARK_HEADER "MThd"
#define MARK_TRACK "MTrk"
#define MARK_LEN 4
#define SIZE_LEN 4
#define HEADER_LEN 6
#define GET8(p) ((p)[0])
#define GET16(p) (((p)[0] << 8) | (p)[1])
#define GET24(p) (((p)[0] << 16) | ((p)[1] << 8) | (p)[2])
#define GET32(p) (((p)[0] << 24) | ((p)[1] << 16) | ((p)[2] << 8) | (p)[3])
void
usage()
{
printf("Usage: %s [-d unit] [-f file] [-l] [-m] [-q] [-t tempo] [-v] [-x] [file ...]\n",
__progname);
exit(1);
}
int showmeta = 0;
int verbose = 0;
#define BASETEMPO 400000
u_int tempo = BASETEMPO; /* microsec / quarter note */
u_int ttempo = 100;
int unit = 0;
int play = 1;
int fd;
void
send_event(ev)
seq_event_rec *ev;
{
/*
printf("%02x %02x %02x %02x %02x %02x %02x %02x\n",
ev->arr[0], ev->arr[1], ev->arr[2], ev->arr[3],
ev->arr[4], ev->arr[5], ev->arr[6], ev->arr[7]);
*/
if (play)
write(fd, ev, sizeof *ev);
}
u_long
getvar(tp)
struct track *tp;
{
u_long r, c;
r = 0;
do {
c = *tp->start++;
r = (r << 7) | (c & 0x7f);
} while ((c & 0x80) && tp->start < tp->end);
return (r);
}
void
dometa(meta, p, len)
u_int meta;
u_char *p;
u_int len;
{
switch (meta) {
case META_TEXT:
case META_COPYRIGHT:
case META_TRACK:
case META_INSTRUMENT:
case META_LYRIC:
case META_MARKER:
case META_CUE:
if (showmeta) {
printf("%s: ", metanames[meta]);
fwrite(p, len, 1, stdout);
printf("\n");
}
break;
case META_SET_TEMPO:
tempo = GET24(p);
if (showmeta)
printf("Tempo: %d us / quarter note\n", tempo);
break;
case META_TIMESIGN:
if (showmeta) {
int n = p[1];
int d = 1;
while (n-- > 0)
d *= 2;
printf("Time signature: %d/%d %d,%d\n",
p[0], d, p[2], p[3]);
}
break;
case META_KEY:
if (showmeta)
printf("Key: %d %s\n", (char)p[0],
p[1] ? "minor" : "major");
break;
default:
break;
}
}
void
midireset()
{
/* General MIDI reset sequence */
static u_char gm_reset[] = { 0x7e, 0x7f, 0x09, 0x01, 0xf7 };
send_sysex(gm_reset, sizeof gm_reset);
}
#define SYSEX_CHUNK 6
void
send_sysex(p, l)
u_char *p;
u_int l;
{
seq_event_rec event;
u_int n;
event.arr[0] = SEQ_SYSEX;
event.arr[1] = unit;
do {
n = SYSEX_CHUNK;
if (l < n) {
memset(&event.arr[2], 0xff, SYSEX_CHUNK);
n = l;
}
memcpy(&event.arr[2], p, n);
send_event(&event);
l -= n;
} while (l > 0);
}
void
playfile(f, name)
FILE *f;
char *name;
{
u_char *buf;
u_int tot, n, size, nread;
/*
* We need to read the whole file into memory for easy processing.
* Using mmap() would be nice, but some file systems do not support
* it, nor does reading from e.g. a pipe. The latter also precludes
* finding out the file size without reading it.
*/
size = 1000;
buf = malloc(size);
if (buf == 0)
errx(1, "malloc() failed\n");
nread = size;
tot = 0;
for (;;) {
n = fread(buf + tot, 1, nread, f);
tot += n;
if (n < nread)
break;
/* There must be more to read. */
nread = size;
size *= 2;
buf = realloc(buf, size);
if (buf == NULL)
errx(1, "realloc() failed\n");
}
playdata(buf, tot, name);
free(buf);
}
void
playdata(buf, tot, name)
u_char *buf;
u_int tot;
char *name;
{
int format, ntrks, divfmt, ticks, t, besttrk = 0;
u_int len, mlen, status, chan;
u_char *p, *end, byte, meta, *msg;
struct track *tracks;
u_long bestcur, now;
struct track *tp;
seq_event_rec event;
end = buf + tot;
if (verbose)
printf("Playing %s (%d bytes) ... \n", name, tot);
if (memcmp(buf, MARK_HEADER, MARK_LEN) != 0) {
warnx("Not a MIDI file, missing header\n");
return;
}
if (GET32(buf + MARK_LEN) != HEADER_LEN) {
warnx("Not a MIDI file, bad header\n");
return;
}
format = GET16(buf + MARK_LEN + SIZE_LEN);
ntrks = GET16(buf + MARK_LEN + SIZE_LEN + 2);
divfmt = GET8(buf + MARK_LEN + SIZE_LEN + 4);
ticks = GET8(buf + MARK_LEN + SIZE_LEN + 5);
p = buf + MARK_LEN + SIZE_LEN + HEADER_LEN;
if ((divfmt & 0x80) == 0)
ticks |= divfmt << 8;
else
errx(1, "Absolute time codes not implemented yet\n");
if (verbose > 1)
printf("format=%d ntrks=%d divfmt=%x ticks=%d\n",
format, ntrks, divfmt, ticks);
if (format != 0 && format != 1) {
warnx("Cannnot play MIDI file of type %d\n", format);
return;
}
if (ntrks == 0)
return;
tracks = malloc(ntrks * sizeof(struct track));
if (tracks == NULL)
errx(1, "malloc() tracks failed\n");
for (t = 0; t < ntrks; ) {
if (p >= end - MARK_LEN - SIZE_LEN) {
warnx("Cannot find track %d\n", t);
goto ret;
}
len = GET32(p + MARK_LEN);
if (len > 1000000) { /* a safe guard */
warnx("Crazy track length\n");
goto ret;
}
if (memcmp(p, MARK_TRACK, MARK_LEN) == 0) {
tracks[t].start = p + MARK_LEN + SIZE_LEN;
tracks[t].end = tracks[t].start + len;
tracks[t].curtime = getvar(&tracks[t]);
t++;
}
p += MARK_LEN + SIZE_LEN + len;
}
/*
* Play MIDI events by selecting the track track with the lowest
* curtime. Execute the event, update the curtime and repeat.
*/
/*
* The ticks variable is the number of ticks that make up a quarter
* note and is used as a reference value for the delays between
* the MIDI events.
* The sequencer has two "knobs": the TIMEBASE and the TEMPO.
* The delay specified in TMR_WAIT_REL is specified in
* sequencer time units. The length of a unit is
* 60*1000000 / (TIMEBASE * TEMPO).
* Set it to 1ms/unit (adjusted by user tempo changes).
*/
t = 500 * ttempo / 100;
if (ioctl(fd, SEQUENCER_TMR_TIMEBASE, &t) < 0)
err(1, "SEQUENCER_TMR_TIMEBASE");
t = 120;
if (ioctl(fd, SEQUENCER_TMR_TEMPO, &t) < 0)
err(1, "SEQUENCER_TMR_TEMPO");
if (ioctl(fd, SEQUENCER_TMR_START, 0) < 0)
err(1, "SEQUENCER_TMR_START");
now = 0;
for (;;) {
/* Locate lowest curtime */
bestcur = ~0;
for (t = 0; t < ntrks; t++) {
if (tracks[t].curtime < bestcur) {
bestcur = tracks[t].curtime;
besttrk = t;
}
}
if (bestcur == ~0)
break;
if (verbose > 1) {
printf("DELAY %4ld TRACK %2d ", bestcur-now, besttrk);
fflush(stdout);
}
if (now < bestcur) {
union {
u_int32_t i;
u_int8_t b[4];
} u;
u_int32_t delta = bestcur - now;
delta = (int)((double)delta * tempo / (1000.0*ticks));
u.i = delta;
if (delta != 0) {
event.arr[0] = SEQ_TIMING;
event.arr[1] = TMR_WAIT_REL;
event.arr[4] = u.b[0];
event.arr[5] = u.b[1];
event.arr[6] = u.b[2];
event.arr[7] = u.b[3];
send_event(&event);
}
}
now = bestcur;
tp = &tracks[besttrk];
byte = *tp->start++;
if (byte == MIDI_META) {
meta = *tp->start++;
mlen = getvar(tp);
if (verbose > 1)
printf("META %02x (%d)\n", meta, mlen);
dometa(meta, tp->start, mlen);
tp->start += mlen;
} else {
if (MIDI_IS_STATUS(byte))
tp->status = byte;
else
tp->start--;
mlen = MIDI_LENGTH(tp->status);
msg = tp->start;
if (verbose > 1) {
if (mlen == 1)
printf("MIDI %02x (%d) %02x\n",
tp->status, mlen, msg[0]);
else
printf("MIDI %02x (%d) %02x %02x\n",
tp->status, mlen, msg[0], msg[1]);
}
status = MIDI_GET_STATUS(tp->status);
chan = MIDI_GET_CHAN(tp->status);
switch (status) {
case MIDI_NOTEOFF:
case MIDI_NOTEON:
case MIDI_KEY_PRESSURE:
SEQ_MK_CHN_VOICE(&event, unit, status, chan,
msg[0], msg[1]);
send_event(&event);
break;
case MIDI_CTL_CHANGE:
SEQ_MK_CHN_COMMON(&event, unit, status, chan,
msg[0], 0, msg[1]);
send_event(&event);
break;
case MIDI_PGM_CHANGE:
case MIDI_CHN_PRESSURE:
SEQ_MK_CHN_COMMON(&event, unit, status, chan,
msg[0], 0, 0);
send_event(&event);
break;
case MIDI_PITCH_BEND:
SEQ_MK_CHN_COMMON(&event, unit, status, chan,
0, 0,
(msg[0] & 0x7f) |
((msg[1] & 0x7f) << 7));
send_event(&event);
break;
case MIDI_SYSTEM_PREFIX:
mlen = getvar(tp);
if (tp->status == MIDI_SYSEX_START)
send_sysex(tp->start, mlen);
else
/* Sorry, can't do this yet */;
break;
default:
if (verbose)
printf("MIDI event 0x%02x ignored\n",
tp->status);
}
tp->start += mlen;
}
if (tp->start >= tp->end)
tp->curtime = ~0;
else
tp->curtime += getvar(tp);
}
if (ioctl(fd, SEQUENCER_SYNC, 0) < 0)
err(1, "SEQUENCER_SYNC");
ret:
free(tracks);
}
int
main(argc, argv)
int argc;
char **argv;
{
int ch;
int listdevs = 0;
int example = 0;
int nmidi;
char *file = DEVMUSIC;
struct synth_info info;
FILE *f;
while ((ch = getopt(argc, argv, "?d:f:lmqt:vx")) != -1) {
switch(ch) {
case 'd':
unit = atoi(optarg);
break;
case 'f':
file = optarg;
break;
case 'l':
listdevs++;
break;
case 'm':
showmeta++;
break;
case 'q':
play = 0;
break;
case 't':
ttempo = atoi(optarg);
break;
case 'v':
verbose++;
break;
case 'x':
example++;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
fd = open(file, O_WRONLY);
if (fd < 0)
err(1, "%s", file);
if (ioctl(fd, SEQUENCER_NRMIDIS, &nmidi) < 0)
err(1, "ioctl(SEQUENCER_NRMIDIS) failed, ");
if (nmidi == 0)
errx(1, "Sorry, no MIDI devices available\n");
if (listdevs) {
for (info.device = 0; info.device < nmidi; info.device++) {
if (ioctl(fd, SEQUENCER_INFO, &info) < 0)
err(1, "ioctl(SEQUENCER_INFO) failed, ");
printf("%d: %s\n", info.device, info.name);
}
exit(0);
}
midireset();
if (example)
playdata(sample, sizeof sample, "<Gubben Noa>");
else if (argc == 0)
playfile(stdin, "<stdin>");
else
while (argc--) {
f = fopen(*argv, "r");
if (f == NULL)
err(1, "%s", *argv);
else {
playfile(f, *argv);
fclose(f);
}
argv++;
}
exit(0);
}
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