midiplay.c revision 1.19
1 /* $NetBSD: midiplay.c,v 1.19 2003/06/23 13:05:49 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002 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 #include <sys/cdefs.h> 39 40 #ifndef lint 41 __RCSID("$NetBSD: midiplay.c,v 1.19 2003/06/23 13:05:49 agc Exp $"); 42 #endif 43 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <fcntl.h> 48 #include <err.h> 49 #include <unistd.h> 50 #include <string.h> 51 #include <sys/types.h> 52 #include <sys/stat.h> 53 #include <sys/ioctl.h> 54 #include <sys/midiio.h> 55 56 #define DEVMUSIC "/dev/music" 57 58 struct track { 59 u_char *start, *end; 60 u_long curtime; 61 u_char status; 62 }; 63 64 #define MIDI_META 0xff 65 66 #define META_SEQNO 0x00 67 #define META_TEXT 0x01 68 #define META_COPYRIGHT 0x02 69 #define META_TRACK 0x03 70 #define META_INSTRUMENT 0x04 71 #define META_LYRIC 0x05 72 #define META_MARKER 0x06 73 #define META_CUE 0x07 74 #define META_CHPREFIX 0x20 75 #define META_EOT 0x2f 76 #define META_SET_TEMPO 0x51 77 #define META_KEY 0x59 78 #define META_SMPTE 0x54 79 #define META_TIMESIGN 0x58 80 81 char *metanames[] = { 82 "", "Text", "Copyright", "Track", "Instrument", 83 "Lyric", "Marker", "Cue", 84 }; 85 86 static int midi_lengths[] = { 2,2,2,2,1,1,2,0 }; 87 /* Number of bytes in a MIDI command */ 88 #define MIDI_LENGTH(d) (midi_lengths[((d) >> 4) & 7]) 89 90 void usage(void); 91 void send_event(seq_event_rec *); 92 void dometa(u_int, u_char *, u_int); 93 void midireset(void); 94 void send_sysex(u_char *, u_int); 95 u_long getvar(struct track *); 96 void playfile(FILE *, char *); 97 void playdata(u_char *, u_int, char *); 98 int main(int argc, char **argv); 99 100 #define P(c) 1,0x90,c,0x7f,4,0x80,c,0 101 #define PL(c) 1,0x90,c,0x7f,8,0x80,c,0 102 #define C 0x3c 103 #define D 0x3e 104 #define E 0x40 105 #define F 0x41 106 107 u_char sample[] = { 108 'M','T','h','d', 0,0,0,6, 0,1, 0,1, 0,8, 109 'M','T','r','k', 0,0,0,4+13*8, 110 P(C), P(C), P(C), P(E), P(D), P(D), P(D), 111 P(F), P(E), P(E), P(D), P(D), PL(C), 112 0, 0xff, 0x2f, 0 113 }; 114 #undef P 115 #undef PL 116 #undef C 117 #undef D 118 #undef E 119 #undef F 120 121 #define MARK_HEADER "MThd" 122 #define MARK_TRACK "MTrk" 123 #define MARK_LEN 4 124 125 #define RMID_SIG "RIFF" 126 #define RMID_MIDI_ID "RMID" 127 #define RMID_DATA_ID "data" 128 129 #define SIZE_LEN 4 130 #define HEADER_LEN 6 131 132 #define GET8(p) ((p)[0]) 133 #define GET16(p) (((p)[0] << 8) | (p)[1]) 134 #define GET24(p) (((p)[0] << 16) | ((p)[1] << 8) | (p)[2]) 135 #define GET32(p) (((p)[0] << 24) | ((p)[1] << 16) | ((p)[2] << 8) | (p)[3]) 136 #define GET32_LE(p) (((p)[3] << 24) | ((p)[2] << 16) | ((p)[1] << 8) | (p)[0]) 137 138 void 139 usage(void) 140 { 141 printf("Usage: %s [-d unit] [-f file] [-l] [-m] [-p pgm] [-q] " 142 "[-t tempo] [-v] [-x] [file ...]\n", 143 getprogname()); 144 exit(1); 145 } 146 147 int showmeta = 0; 148 int verbose = 0; 149 #define BASETEMPO 400000 150 u_int tempo = BASETEMPO; /* microsec / quarter note */ 151 u_int ttempo = 100; 152 int unit = 0; 153 int play = 1; 154 int fd = -1; 155 int sameprogram = 0; 156 157 void 158 send_event(seq_event_rec *ev) 159 { 160 /* 161 printf("%02x %02x %02x %02x %02x %02x %02x %02x\n", 162 ev->arr[0], ev->arr[1], ev->arr[2], ev->arr[3], 163 ev->arr[4], ev->arr[5], ev->arr[6], ev->arr[7]); 164 */ 165 if (play) 166 write(fd, ev, sizeof *ev); 167 } 168 169 u_long 170 getvar(struct track *tp) 171 { 172 u_long r, c; 173 174 r = 0; 175 do { 176 c = *tp->start++; 177 r = (r << 7) | (c & 0x7f); 178 } while ((c & 0x80) && tp->start < tp->end); 179 return (r); 180 } 181 182 void 183 dometa(u_int meta, u_char *p, u_int len) 184 { 185 switch (meta) { 186 case META_TEXT: 187 case META_COPYRIGHT: 188 case META_TRACK: 189 case META_INSTRUMENT: 190 case META_LYRIC: 191 case META_MARKER: 192 case META_CUE: 193 if (showmeta) { 194 printf("%s: ", metanames[meta]); 195 fwrite(p, len, 1, stdout); 196 printf("\n"); 197 } 198 break; 199 case META_SET_TEMPO: 200 tempo = GET24(p); 201 if (showmeta) 202 printf("Tempo: %d us / quarter note\n", tempo); 203 break; 204 case META_TIMESIGN: 205 if (showmeta) { 206 int n = p[1]; 207 int d = 1; 208 while (n-- > 0) 209 d *= 2; 210 printf("Time signature: %d/%d %d,%d\n", 211 p[0], d, p[2], p[3]); 212 } 213 break; 214 case META_KEY: 215 if (showmeta) 216 printf("Key: %d %s\n", (char)p[0], 217 p[1] ? "minor" : "major"); 218 break; 219 default: 220 break; 221 } 222 } 223 224 void 225 midireset(void) 226 { 227 /* General MIDI reset sequence */ 228 static u_char gm_reset[] = { 0x7e, 0x7f, 0x09, 0x01, 0xf7 }; 229 230 send_sysex(gm_reset, sizeof gm_reset); 231 } 232 233 #define SYSEX_CHUNK 6 234 void 235 send_sysex(u_char *p, u_int l) 236 { 237 seq_event_rec event; 238 u_int n; 239 240 event.arr[0] = SEQ_SYSEX; 241 event.arr[1] = unit; 242 do { 243 n = SYSEX_CHUNK; 244 if (l < n) { 245 memset(&event.arr[2], 0xff, SYSEX_CHUNK); 246 n = l; 247 } 248 memcpy(&event.arr[2], p, n); 249 send_event(&event); 250 l -= n; 251 p += n; 252 } while (l > 0); 253 } 254 255 void 256 playfile(FILE *f, char *name) 257 { 258 u_char *buf; 259 u_int tot, n, size, nread; 260 261 /* 262 * We need to read the whole file into memory for easy processing. 263 * Using mmap() would be nice, but some file systems do not support 264 * it, nor does reading from e.g. a pipe. The latter also precludes 265 * finding out the file size without reading it. 266 */ 267 size = 1000; 268 buf = malloc(size); 269 if (buf == 0) 270 errx(1, "malloc() failed"); 271 nread = size; 272 tot = 0; 273 for (;;) { 274 n = fread(buf + tot, 1, nread, f); 275 tot += n; 276 if (n < nread) 277 break; 278 /* There must be more to read. */ 279 nread = size; 280 size *= 2; 281 buf = realloc(buf, size); 282 if (buf == NULL) 283 errx(1, "realloc() failed"); 284 } 285 playdata(buf, tot, name); 286 free(buf); 287 } 288 289 void 290 playdata(u_char *buf, u_int tot, 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 (tot < MARK_LEN + 4) { 305 warnx("Not a MIDI file, too short"); 306 return; 307 } 308 309 if (memcmp(buf, RMID_SIG, MARK_LEN) == 0) { 310 u_char *eod; 311 /* Detected a RMID file, let's just check if it's 312 * a MIDI file */ 313 if (GET32_LE(buf + MARK_LEN) != tot - 8) { 314 warnx("Not a RMID file, bad header"); 315 return; 316 } 317 318 buf += MARK_LEN + 4; 319 if (memcmp(buf, RMID_MIDI_ID, MARK_LEN) != 0) { 320 warnx("Not a RMID file, bad ID"); 321 return; 322 } 323 324 /* Now look for the 'data' chunk, which contains 325 * MIDI data */ 326 buf += MARK_LEN; 327 328 /* Test against end-8 since we must have at least 8 bytes 329 * left to read */ 330 while(buf < end-8 && memcmp(buf, RMID_DATA_ID, MARK_LEN)) 331 buf += GET32_LE(buf+4) + 8; /* MARK_LEN + 4 */ 332 333 if (buf >= end-8) { 334 warnx("Not a valid RMID file, no data chunk"); 335 return; 336 } 337 338 buf += MARK_LEN; /* "data" */ 339 eod = buf + 4 + GET32_LE(buf); 340 if (eod >= end) { 341 warnx("Not a valid RMID file, bad data chunk size"); 342 return; 343 } 344 345 end = eod; 346 buf += 4; 347 } 348 349 if (memcmp(buf, MARK_HEADER, MARK_LEN) != 0) { 350 warnx("Not a MIDI file, missing header"); 351 return; 352 } 353 354 if (GET32(buf + MARK_LEN) != HEADER_LEN) { 355 warnx("Not a MIDI file, bad header"); 356 return; 357 } 358 format = GET16(buf + MARK_LEN + SIZE_LEN); 359 ntrks = GET16(buf + MARK_LEN + SIZE_LEN + 2); 360 divfmt = GET8(buf + MARK_LEN + SIZE_LEN + 4); 361 ticks = GET8(buf + MARK_LEN + SIZE_LEN + 5); 362 p = buf + MARK_LEN + SIZE_LEN + HEADER_LEN; 363 if ((divfmt & 0x80) == 0) 364 ticks |= divfmt << 8; 365 else 366 errx(1, "Absolute time codes not implemented yet"); 367 if (verbose > 1) 368 printf("format=%d ntrks=%d divfmt=%x ticks=%d\n", 369 format, ntrks, divfmt, ticks); 370 if (format != 0 && format != 1) { 371 warnx("Cannot play MIDI file of type %d", format); 372 return; 373 } 374 if (ntrks == 0) 375 return; 376 tracks = malloc(ntrks * sizeof(struct track)); 377 if (tracks == NULL) 378 errx(1, "malloc() tracks failed"); 379 for (t = 0; t < ntrks; ) { 380 if (p >= end - MARK_LEN - SIZE_LEN) { 381 warnx("Cannot find track %d", t); 382 goto ret; 383 } 384 len = GET32(p + MARK_LEN); 385 if (len > 1000000) { /* a safe guard */ 386 warnx("Crazy track length"); 387 goto ret; 388 } 389 if (memcmp(p, MARK_TRACK, MARK_LEN) == 0) { 390 tracks[t].start = p + MARK_LEN + SIZE_LEN; 391 tracks[t].end = tracks[t].start + len; 392 tracks[t].curtime = getvar(&tracks[t]); 393 t++; 394 } 395 p += MARK_LEN + SIZE_LEN + len; 396 } 397 398 /* 399 * Play MIDI events by selecting the track with the lowest 400 * curtime. Execute the event, update the curtime and repeat. 401 */ 402 if (sameprogram) { 403 for(t = 0; t < 16; t++) { 404 SEQ_MK_CHN_COMMON(&event, unit, MIDI_PGM_CHANGE, t, 405 sameprogram-1, 0, 0); 406 send_event(&event); 407 } 408 } 409 /* 410 * The ticks variable is the number of ticks that make up a quarter 411 * note and is used as a reference value for the delays between 412 * the MIDI events. 413 */ 414 now = 0; 415 for (;;) { 416 /* Locate lowest curtime */ 417 bestcur = ~0; 418 for (t = 0; t < ntrks; t++) { 419 if (tracks[t].curtime < bestcur) { 420 bestcur = tracks[t].curtime; 421 besttrk = t; 422 } 423 } 424 if (bestcur == ~0) 425 break; 426 if (verbose > 1) { 427 printf("DELAY %4ld TRACK %2d ", bestcur-now, besttrk); 428 fflush(stdout); 429 } 430 if (now < bestcur) { 431 union { 432 u_int32_t i; 433 u_int8_t b[4]; 434 } u; 435 u_int32_t delta = bestcur - now; 436 delta = (int)((double)delta * tempo / (1000.0*ticks)); 437 u.i = delta; 438 if (delta != 0) { 439 event.arr[0] = SEQ_TIMING; 440 event.arr[1] = TMR_WAIT_REL; 441 event.arr[4] = u.b[0]; 442 event.arr[5] = u.b[1]; 443 event.arr[6] = u.b[2]; 444 event.arr[7] = u.b[3]; 445 send_event(&event); 446 } 447 } 448 now = bestcur; 449 tp = &tracks[besttrk]; 450 byte = *tp->start++; 451 if (byte == MIDI_META) { 452 meta = *tp->start++; 453 mlen = getvar(tp); 454 if (verbose > 1) 455 printf("META %02x (%d)\n", meta, mlen); 456 dometa(meta, tp->start, mlen); 457 tp->start += mlen; 458 } else { 459 if (MIDI_IS_STATUS(byte)) 460 tp->status = byte; 461 else 462 tp->start--; 463 mlen = MIDI_LENGTH(tp->status); 464 msg = tp->start; 465 if (verbose > 1) { 466 if (mlen == 1) 467 printf("MIDI %02x (%d) %02x\n", 468 tp->status, mlen, msg[0]); 469 else 470 printf("MIDI %02x (%d) %02x %02x\n", 471 tp->status, mlen, msg[0], msg[1]); 472 } 473 status = MIDI_GET_STATUS(tp->status); 474 chan = MIDI_GET_CHAN(tp->status); 475 switch (status) { 476 case MIDI_NOTEOFF: 477 case MIDI_NOTEON: 478 case MIDI_KEY_PRESSURE: 479 SEQ_MK_CHN_VOICE(&event, unit, status, chan, 480 msg[0], msg[1]); 481 send_event(&event); 482 break; 483 case MIDI_CTL_CHANGE: 484 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 485 msg[0], 0, msg[1]); 486 send_event(&event); 487 break; 488 case MIDI_PGM_CHANGE: 489 if (sameprogram) 490 break; 491 case MIDI_CHN_PRESSURE: 492 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 493 msg[0], 0, 0); 494 send_event(&event); 495 break; 496 case MIDI_PITCH_BEND: 497 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 498 0, 0, 499 (msg[0] & 0x7f) | 500 ((msg[1] & 0x7f) << 7)); 501 send_event(&event); 502 break; 503 case MIDI_SYSTEM_PREFIX: 504 mlen = getvar(tp); 505 if (tp->status == MIDI_SYSEX_START) 506 send_sysex(tp->start, mlen); 507 else 508 /* Sorry, can't do this yet */; 509 break; 510 default: 511 if (verbose) 512 printf("MIDI event 0x%02x ignored\n", 513 tp->status); 514 } 515 tp->start += mlen; 516 } 517 if (tp->start >= tp->end) 518 tp->curtime = ~0; 519 else 520 tp->curtime += getvar(tp); 521 } 522 if (ioctl(fd, SEQUENCER_SYNC, 0) < 0) 523 err(1, "SEQUENCER_SYNC"); 524 525 ret: 526 free(tracks); 527 } 528 529 int 530 main(int argc, char **argv) 531 { 532 int ch; 533 int listdevs = 0; 534 int example = 0; 535 int nmidi; 536 int t; 537 const char *file = DEVMUSIC; 538 const char *sunit; 539 struct synth_info info; 540 FILE *f; 541 542 if ((sunit = getenv("MIDIUNIT"))) 543 unit = atoi(sunit); 544 545 while ((ch = getopt(argc, argv, "?d:f:lmp:qt:vx")) != -1) { 546 switch(ch) { 547 case 'd': 548 unit = atoi(optarg); 549 break; 550 case 'f': 551 file = optarg; 552 break; 553 case 'l': 554 listdevs++; 555 break; 556 case 'm': 557 showmeta++; 558 break; 559 case 'p': 560 sameprogram = atoi(optarg); 561 break; 562 case 'q': 563 play = 0; 564 break; 565 case 't': 566 ttempo = atoi(optarg); 567 break; 568 case 'v': 569 verbose++; 570 break; 571 case 'x': 572 example++; 573 break; 574 case '?': 575 default: 576 usage(); 577 } 578 } 579 argc -= optind; 580 argv += optind; 581 582 if (!play) 583 goto output; 584 585 fd = open(file, O_WRONLY); 586 if (fd < 0) 587 err(1, "%s", file); 588 if (ioctl(fd, SEQUENCER_NRMIDIS, &nmidi) < 0) 589 err(1, "ioctl(SEQUENCER_NRMIDIS) failed, "); 590 if (nmidi == 0) 591 errx(1, "Sorry, no MIDI devices available"); 592 if (listdevs) { 593 for (info.device = 0; info.device < nmidi; info.device++) { 594 if (ioctl(fd, SEQUENCER_INFO, &info) < 0) 595 err(1, "ioctl(SEQUENCER_INFO) failed, "); 596 printf("%d: %s\n", info.device, info.name); 597 } 598 exit(0); 599 } 600 601 /* 602 * The sequencer has two "knobs": the TIMEBASE and the TEMPO. 603 * The delay specified in TMR_WAIT_REL is specified in 604 * sequencer time units. The length of a unit is 605 * 60*1000000 / (TIMEBASE * TEMPO). 606 * Set it to 1ms/unit (adjusted by user tempo changes). 607 */ 608 t = 500 * ttempo / 100; 609 if (ioctl(fd, SEQUENCER_TMR_TIMEBASE, &t) < 0) 610 err(1, "SEQUENCER_TMR_TIMEBASE"); 611 t = 120; 612 if (ioctl(fd, SEQUENCER_TMR_TEMPO, &t) < 0) 613 err(1, "SEQUENCER_TMR_TEMPO"); 614 if (ioctl(fd, SEQUENCER_TMR_START, 0) < 0) 615 err(1, "SEQUENCER_TMR_START"); 616 617 midireset(); 618 619 output: 620 if (example) 621 while (example--) 622 playdata(sample, sizeof sample, "<Gubben Noa>"); 623 else if (argc == 0) 624 playfile(stdin, "<stdin>"); 625 else 626 while (argc--) { 627 f = fopen(*argv, "r"); 628 if (f == NULL) 629 err(1, "%s", *argv); 630 else { 631 playfile(f, *argv); 632 fclose(f); 633 } 634 argv++; 635 } 636 637 exit(0); 638 } 639
Indexes created Thu Sep 25 16:09:42 GMT 2025