midiplay.c revision 1.15
1 /* $NetBSD: midiplay.c,v 1.15 2001/11/25 12:29:52 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (augustss (at) netbsd.org). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <fcntl.h> 42 #include <err.h> 43 #include <unistd.h> 44 #include <string.h> 45 #include <sys/types.h> 46 #include <sys/stat.h> 47 #include <sys/ioctl.h> 48 #include <sys/midiio.h> 49 50 #define DEVMUSIC "/dev/music" 51 52 struct track { 53 u_char *start, *end; 54 u_long curtime; 55 u_char status; 56 }; 57 58 #define MIDI_META 0xff 59 60 #define META_SEQNO 0x00 61 #define META_TEXT 0x01 62 #define META_COPYRIGHT 0x02 63 #define META_TRACK 0x03 64 #define META_INSTRUMENT 0x04 65 #define META_LYRIC 0x05 66 #define META_MARKER 0x06 67 #define META_CUE 0x07 68 #define META_CHPREFIX 0x20 69 #define META_EOT 0x2f 70 #define META_SET_TEMPO 0x51 71 #define META_KEY 0x59 72 #define META_SMPTE 0x54 73 #define META_TIMESIGN 0x58 74 75 char *metanames[] = { 76 "", "Text", "Copyright", "Track", "Instrument", 77 "Lyric", "Marker", "Cue", 78 }; 79 80 static int midi_lengths[] = { 2,2,2,2,1,1,2,0 }; 81 /* Number of bytes in a MIDI command */ 82 #define MIDI_LENGTH(d) (midi_lengths[((d) >> 4) & 7]) 83 84 void usage __P((void)); 85 void send_event __P((seq_event_rec *)); 86 void dometa __P((u_int, u_char *, u_int)); 87 void midireset __P((void)); 88 void send_sysex __P((u_char *, u_int)); 89 u_long getvar __P((struct track *)); 90 void playfile __P((FILE *, char *)); 91 void playdata __P((u_char *, u_int, char *)); 92 int main __P((int argc, char **argv)); 93 94 #define P(c) 1,0x90,c,0x7f,4,0x80,c,0 95 #define PL(c) 1,0x90,c,0x7f,8,0x80,c,0 96 #define C 0x3c 97 #define D 0x3e 98 #define E 0x40 99 #define F 0x41 100 101 u_char sample[] = { 102 'M','T','h','d', 0,0,0,6, 0,1, 0,1, 0,8, 103 'M','T','r','k', 0,0,0,4+13*8, 104 P(C), P(C), P(C), P(E), P(D), P(D), P(D), 105 P(F), P(E), P(E), P(D), P(D), PL(C), 106 0, 0xff, 0x2f, 0 107 }; 108 #undef P 109 #undef PL 110 #undef C 111 #undef D 112 #undef E 113 #undef F 114 115 #define MARK_HEADER "MThd" 116 #define MARK_TRACK "MTrk" 117 #define MARK_LEN 4 118 119 #define SIZE_LEN 4 120 #define HEADER_LEN 6 121 122 #define GET8(p) ((p)[0]) 123 #define GET16(p) (((p)[0] << 8) | (p)[1]) 124 #define GET24(p) (((p)[0] << 16) | ((p)[1] << 8) | (p)[2]) 125 #define GET32(p) (((p)[0] << 24) | ((p)[1] << 16) | ((p)[2] << 8) | (p)[3]) 126 127 void 128 usage() 129 { 130 printf("Usage: %s [-d unit] [-f file] [-l] [-m] [-p pgm] [-q] [-t tempo] [-v] [-x] [file ...]\n", 131 getprogname()); 132 exit(1); 133 } 134 135 int showmeta = 0; 136 int verbose = 0; 137 #define BASETEMPO 400000 138 u_int tempo = BASETEMPO; /* microsec / quarter note */ 139 u_int ttempo = 100; 140 int unit = 0; 141 int play = 1; 142 int fd = -1; 143 int sameprogram = 0; 144 145 void 146 send_event(ev) 147 seq_event_rec *ev; 148 { 149 /* 150 printf("%02x %02x %02x %02x %02x %02x %02x %02x\n", 151 ev->arr[0], ev->arr[1], ev->arr[2], ev->arr[3], 152 ev->arr[4], ev->arr[5], ev->arr[6], ev->arr[7]); 153 */ 154 if (play) 155 write(fd, ev, sizeof *ev); 156 } 157 158 u_long 159 getvar(tp) 160 struct track *tp; 161 { 162 u_long r, c; 163 164 r = 0; 165 do { 166 c = *tp->start++; 167 r = (r << 7) | (c & 0x7f); 168 } while ((c & 0x80) && tp->start < tp->end); 169 return (r); 170 } 171 172 void 173 dometa(meta, p, len) 174 u_int meta; 175 u_char *p; 176 u_int len; 177 { 178 switch (meta) { 179 case META_TEXT: 180 case META_COPYRIGHT: 181 case META_TRACK: 182 case META_INSTRUMENT: 183 case META_LYRIC: 184 case META_MARKER: 185 case META_CUE: 186 if (showmeta) { 187 printf("%s: ", metanames[meta]); 188 fwrite(p, len, 1, stdout); 189 printf("\n"); 190 } 191 break; 192 case META_SET_TEMPO: 193 tempo = GET24(p); 194 if (showmeta) 195 printf("Tempo: %d us / quarter note\n", tempo); 196 break; 197 case META_TIMESIGN: 198 if (showmeta) { 199 int n = p[1]; 200 int d = 1; 201 while (n-- > 0) 202 d *= 2; 203 printf("Time signature: %d/%d %d,%d\n", 204 p[0], d, p[2], p[3]); 205 } 206 break; 207 case META_KEY: 208 if (showmeta) 209 printf("Key: %d %s\n", (char)p[0], 210 p[1] ? "minor" : "major"); 211 break; 212 default: 213 break; 214 } 215 } 216 217 void 218 midireset() 219 { 220 /* General MIDI reset sequence */ 221 static u_char gm_reset[] = { 0x7e, 0x7f, 0x09, 0x01, 0xf7 }; 222 223 send_sysex(gm_reset, sizeof gm_reset); 224 } 225 226 #define SYSEX_CHUNK 6 227 void 228 send_sysex(p, l) 229 u_char *p; 230 u_int l; 231 { 232 seq_event_rec event; 233 u_int n; 234 235 event.arr[0] = SEQ_SYSEX; 236 event.arr[1] = unit; 237 do { 238 n = SYSEX_CHUNK; 239 if (l < n) { 240 memset(&event.arr[2], 0xff, SYSEX_CHUNK); 241 n = l; 242 } 243 memcpy(&event.arr[2], p, n); 244 send_event(&event); 245 l -= n; 246 p += n; 247 } while (l > 0); 248 } 249 250 void 251 playfile(f, name) 252 FILE *f; 253 char *name; 254 { 255 u_char *buf; 256 u_int tot, n, size, nread; 257 258 /* 259 * We need to read the whole file into memory for easy processing. 260 * Using mmap() would be nice, but some file systems do not support 261 * it, nor does reading from e.g. a pipe. The latter also precludes 262 * finding out the file size without reading it. 263 */ 264 size = 1000; 265 buf = malloc(size); 266 if (buf == 0) 267 errx(1, "malloc() failed\n"); 268 nread = size; 269 tot = 0; 270 for (;;) { 271 n = fread(buf + tot, 1, nread, f); 272 tot += n; 273 if (n < nread) 274 break; 275 /* There must be more to read. */ 276 nread = size; 277 size *= 2; 278 buf = realloc(buf, size); 279 if (buf == NULL) 280 errx(1, "realloc() failed\n"); 281 } 282 playdata(buf, tot, name); 283 free(buf); 284 } 285 286 void 287 playdata(buf, tot, name) 288 u_char *buf; 289 u_int tot; 290 char *name; 291 { 292 int format, ntrks, divfmt, ticks, t, besttrk = 0; 293 u_int len, mlen, status, chan; 294 u_char *p, *end, byte, meta, *msg; 295 struct track *tracks; 296 u_long bestcur, now; 297 struct track *tp; 298 seq_event_rec event; 299 300 end = buf + tot; 301 if (verbose) 302 printf("Playing %s (%d bytes) ... \n", name, tot); 303 304 if (memcmp(buf, MARK_HEADER, MARK_LEN) != 0) { 305 warnx("Not a MIDI file, missing header\n"); 306 return; 307 } 308 if (GET32(buf + MARK_LEN) != HEADER_LEN) { 309 warnx("Not a MIDI file, bad header\n"); 310 return; 311 } 312 format = GET16(buf + MARK_LEN + SIZE_LEN); 313 ntrks = GET16(buf + MARK_LEN + SIZE_LEN + 2); 314 divfmt = GET8(buf + MARK_LEN + SIZE_LEN + 4); 315 ticks = GET8(buf + MARK_LEN + SIZE_LEN + 5); 316 p = buf + MARK_LEN + SIZE_LEN + HEADER_LEN; 317 if ((divfmt & 0x80) == 0) 318 ticks |= divfmt << 8; 319 else 320 errx(1, "Absolute time codes not implemented yet\n"); 321 if (verbose > 1) 322 printf("format=%d ntrks=%d divfmt=%x ticks=%d\n", 323 format, ntrks, divfmt, ticks); 324 if (format != 0 && format != 1) { 325 warnx("Cannot play MIDI file of type %d\n", format); 326 return; 327 } 328 if (ntrks == 0) 329 return; 330 tracks = malloc(ntrks * sizeof(struct track)); 331 if (tracks == NULL) 332 errx(1, "malloc() tracks failed\n"); 333 for (t = 0; t < ntrks; ) { 334 if (p >= end - MARK_LEN - SIZE_LEN) { 335 warnx("Cannot find track %d\n", t); 336 goto ret; 337 } 338 len = GET32(p + MARK_LEN); 339 if (len > 1000000) { /* a safe guard */ 340 warnx("Crazy track length\n"); 341 goto ret; 342 } 343 if (memcmp(p, MARK_TRACK, MARK_LEN) == 0) { 344 tracks[t].start = p + MARK_LEN + SIZE_LEN; 345 tracks[t].end = tracks[t].start + len; 346 tracks[t].curtime = getvar(&tracks[t]); 347 t++; 348 } 349 p += MARK_LEN + SIZE_LEN + len; 350 } 351 352 /* 353 * Play MIDI events by selecting the track with the lowest 354 * curtime. Execute the event, update the curtime and repeat. 355 */ 356 if (sameprogram) { 357 for(t = 0; t < 16; t++) { 358 SEQ_MK_CHN_COMMON(&event, unit, MIDI_PGM_CHANGE, t, 359 sameprogram-1, 0, 0); 360 send_event(&event); 361 } 362 } 363 /* 364 * The ticks variable is the number of ticks that make up a quarter 365 * note and is used as a reference value for the delays between 366 * the MIDI events. 367 */ 368 now = 0; 369 for (;;) { 370 /* Locate lowest curtime */ 371 bestcur = ~0; 372 for (t = 0; t < ntrks; t++) { 373 if (tracks[t].curtime < bestcur) { 374 bestcur = tracks[t].curtime; 375 besttrk = t; 376 } 377 } 378 if (bestcur == ~0) 379 break; 380 if (verbose > 1) { 381 printf("DELAY %4ld TRACK %2d ", bestcur-now, besttrk); 382 fflush(stdout); 383 } 384 if (now < bestcur) { 385 union { 386 u_int32_t i; 387 u_int8_t b[4]; 388 } u; 389 u_int32_t delta = bestcur - now; 390 delta = (int)((double)delta * tempo / (1000.0*ticks)); 391 u.i = delta; 392 if (delta != 0) { 393 event.arr[0] = SEQ_TIMING; 394 event.arr[1] = TMR_WAIT_REL; 395 event.arr[4] = u.b[0]; 396 event.arr[5] = u.b[1]; 397 event.arr[6] = u.b[2]; 398 event.arr[7] = u.b[3]; 399 send_event(&event); 400 } 401 } 402 now = bestcur; 403 tp = &tracks[besttrk]; 404 byte = *tp->start++; 405 if (byte == MIDI_META) { 406 meta = *tp->start++; 407 mlen = getvar(tp); 408 if (verbose > 1) 409 printf("META %02x (%d)\n", meta, mlen); 410 dometa(meta, tp->start, mlen); 411 tp->start += mlen; 412 } else { 413 if (MIDI_IS_STATUS(byte)) 414 tp->status = byte; 415 else 416 tp->start--; 417 mlen = MIDI_LENGTH(tp->status); 418 msg = tp->start; 419 if (verbose > 1) { 420 if (mlen == 1) 421 printf("MIDI %02x (%d) %02x\n", 422 tp->status, mlen, msg[0]); 423 else 424 printf("MIDI %02x (%d) %02x %02x\n", 425 tp->status, mlen, msg[0], msg[1]); 426 } 427 status = MIDI_GET_STATUS(tp->status); 428 chan = MIDI_GET_CHAN(tp->status); 429 switch (status) { 430 case MIDI_NOTEOFF: 431 case MIDI_NOTEON: 432 case MIDI_KEY_PRESSURE: 433 SEQ_MK_CHN_VOICE(&event, unit, status, chan, 434 msg[0], msg[1]); 435 send_event(&event); 436 break; 437 case MIDI_CTL_CHANGE: 438 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 439 msg[0], 0, msg[1]); 440 send_event(&event); 441 break; 442 case MIDI_PGM_CHANGE: 443 if (sameprogram) 444 break; 445 case MIDI_CHN_PRESSURE: 446 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 447 msg[0], 0, 0); 448 send_event(&event); 449 break; 450 case MIDI_PITCH_BEND: 451 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 452 0, 0, 453 (msg[0] & 0x7f) | 454 ((msg[1] & 0x7f) << 7)); 455 send_event(&event); 456 break; 457 case MIDI_SYSTEM_PREFIX: 458 mlen = getvar(tp); 459 if (tp->status == MIDI_SYSEX_START) 460 send_sysex(tp->start, mlen); 461 else 462 /* Sorry, can't do this yet */; 463 break; 464 default: 465 if (verbose) 466 printf("MIDI event 0x%02x ignored\n", 467 tp->status); 468 } 469 tp->start += mlen; 470 } 471 if (tp->start >= tp->end) 472 tp->curtime = ~0; 473 else 474 tp->curtime += getvar(tp); 475 } 476 if (ioctl(fd, SEQUENCER_SYNC, 0) < 0) 477 err(1, "SEQUENCER_SYNC"); 478 479 ret: 480 free(tracks); 481 } 482 483 int 484 main(argc, argv) 485 int argc; 486 char **argv; 487 { 488 int ch; 489 int listdevs = 0; 490 int example = 0; 491 int nmidi; 492 int t; 493 char *file = DEVMUSIC; 494 struct synth_info info; 495 FILE *f; 496 497 while ((ch = getopt(argc, argv, "?d:f:lmp:qt:vx")) != -1) { 498 switch(ch) { 499 case 'd': 500 unit = atoi(optarg); 501 break; 502 case 'f': 503 file = optarg; 504 break; 505 case 'l': 506 listdevs++; 507 break; 508 case 'm': 509 showmeta++; 510 break; 511 case 'p': 512 sameprogram = atoi(optarg); 513 break; 514 case 'q': 515 play = 0; 516 break; 517 case 't': 518 ttempo = atoi(optarg); 519 break; 520 case 'v': 521 verbose++; 522 break; 523 case 'x': 524 example++; 525 break; 526 case '?': 527 default: 528 usage(); 529 } 530 } 531 argc -= optind; 532 argv += optind; 533 534 if (!play) 535 goto output; 536 537 fd = open(file, O_WRONLY); 538 if (fd < 0) 539 err(1, "%s", file); 540 if (ioctl(fd, SEQUENCER_NRMIDIS, &nmidi) < 0) 541 err(1, "ioctl(SEQUENCER_NRMIDIS) failed, "); 542 if (nmidi == 0) 543 errx(1, "Sorry, no MIDI devices available\n"); 544 if (listdevs) { 545 for (info.device = 0; info.device < nmidi; info.device++) { 546 if (ioctl(fd, SEQUENCER_INFO, &info) < 0) 547 err(1, "ioctl(SEQUENCER_INFO) failed, "); 548 printf("%d: %s\n", info.device, info.name); 549 } 550 exit(0); 551 } 552 553 /* 554 * The sequencer has two "knobs": the TIMEBASE and the TEMPO. 555 * The delay specified in TMR_WAIT_REL is specified in 556 * sequencer time units. The length of a unit is 557 * 60*1000000 / (TIMEBASE * TEMPO). 558 * Set it to 1ms/unit (adjusted by user tempo changes). 559 */ 560 t = 500 * ttempo / 100; 561 if (ioctl(fd, SEQUENCER_TMR_TIMEBASE, &t) < 0) 562 err(1, "SEQUENCER_TMR_TIMEBASE"); 563 t = 120; 564 if (ioctl(fd, SEQUENCER_TMR_TEMPO, &t) < 0) 565 err(1, "SEQUENCER_TMR_TEMPO"); 566 if (ioctl(fd, SEQUENCER_TMR_START, 0) < 0) 567 err(1, "SEQUENCER_TMR_START"); 568 569 midireset(); 570 571 output: 572 if (example) 573 while (example--) 574 playdata(sample, sizeof sample, "<Gubben Noa>"); 575 else if (argc == 0) 576 playfile(stdin, "<stdin>"); 577 else 578 while (argc--) { 579 f = fopen(*argv, "r"); 580 if (f == NULL) 581 err(1, "%s", *argv); 582 else { 583 playfile(f, *argv); 584 fclose(f); 585 } 586 argv++; 587 } 588 589 exit(0); 590 } 591
Indexes created Thu Sep 25 16:09:42 GMT 2025