midiplay.c revision 1.12
1 /* $NetBSD: midiplay.c,v 1.12 2001/02/19 23:03:49 cgd 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; 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 } while (l > 0); 247 } 248 249 void 250 playfile(f, name) 251 FILE *f; 252 char *name; 253 { 254 u_char *buf; 255 u_int tot, n, size, nread; 256 257 /* 258 * We need to read the whole file into memory for easy processing. 259 * Using mmap() would be nice, but some file systems do not support 260 * it, nor does reading from e.g. a pipe. The latter also precludes 261 * finding out the file size without reading it. 262 */ 263 size = 1000; 264 buf = malloc(size); 265 if (buf == 0) 266 errx(1, "malloc() failed\n"); 267 nread = size; 268 tot = 0; 269 for (;;) { 270 n = fread(buf + tot, 1, nread, f); 271 tot += n; 272 if (n < nread) 273 break; 274 /* There must be more to read. */ 275 nread = size; 276 size *= 2; 277 buf = realloc(buf, size); 278 if (buf == NULL) 279 errx(1, "realloc() failed\n"); 280 } 281 playdata(buf, tot, name); 282 free(buf); 283 } 284 285 void 286 playdata(buf, tot, name) 287 u_char *buf; 288 u_int tot; 289 char *name; 290 { 291 int format, ntrks, divfmt, ticks, t, besttrk = 0; 292 u_int len, mlen, status, chan; 293 u_char *p, *end, byte, meta, *msg; 294 struct track *tracks; 295 u_long bestcur, now; 296 struct track *tp; 297 seq_event_rec event; 298 299 end = buf + tot; 300 if (verbose) 301 printf("Playing %s (%d bytes) ... \n", name, tot); 302 303 if (memcmp(buf, MARK_HEADER, MARK_LEN) != 0) { 304 warnx("Not a MIDI file, missing header\n"); 305 return; 306 } 307 if (GET32(buf + MARK_LEN) != HEADER_LEN) { 308 warnx("Not a MIDI file, bad header\n"); 309 return; 310 } 311 format = GET16(buf + MARK_LEN + SIZE_LEN); 312 ntrks = GET16(buf + MARK_LEN + SIZE_LEN + 2); 313 divfmt = GET8(buf + MARK_LEN + SIZE_LEN + 4); 314 ticks = GET8(buf + MARK_LEN + SIZE_LEN + 5); 315 p = buf + MARK_LEN + SIZE_LEN + HEADER_LEN; 316 if ((divfmt & 0x80) == 0) 317 ticks |= divfmt << 8; 318 else 319 errx(1, "Absolute time codes not implemented yet\n"); 320 if (verbose > 1) 321 printf("format=%d ntrks=%d divfmt=%x ticks=%d\n", 322 format, ntrks, divfmt, ticks); 323 if (format != 0 && format != 1) { 324 warnx("Cannot play MIDI file of type %d\n", format); 325 return; 326 } 327 if (ntrks == 0) 328 return; 329 tracks = malloc(ntrks * sizeof(struct track)); 330 if (tracks == NULL) 331 errx(1, "malloc() tracks failed\n"); 332 for (t = 0; t < ntrks; ) { 333 if (p >= end - MARK_LEN - SIZE_LEN) { 334 warnx("Cannot find track %d\n", t); 335 goto ret; 336 } 337 len = GET32(p + MARK_LEN); 338 if (len > 1000000) { /* a safe guard */ 339 warnx("Crazy track length\n"); 340 goto ret; 341 } 342 if (memcmp(p, MARK_TRACK, MARK_LEN) == 0) { 343 tracks[t].start = p + MARK_LEN + SIZE_LEN; 344 tracks[t].end = tracks[t].start + len; 345 tracks[t].curtime = getvar(&tracks[t]); 346 t++; 347 } 348 p += MARK_LEN + SIZE_LEN + len; 349 } 350 351 /* 352 * Play MIDI events by selecting the track track with the lowest 353 * curtime. Execute the event, update the curtime and repeat. 354 */ 355 if (sameprogram) { 356 for(t = 0; t < 16; t++) { 357 SEQ_MK_CHN_COMMON(&event, unit, MIDI_PGM_CHANGE, t, 358 sameprogram+1, 0, 0); 359 send_event(&event); 360 } 361 } 362 /* 363 * The ticks variable is the number of ticks that make up a quarter 364 * note and is used as a reference value for the delays between 365 * the MIDI events. 366 */ 367 now = 0; 368 for (;;) { 369 /* Locate lowest curtime */ 370 bestcur = ~0; 371 for (t = 0; t < ntrks; t++) { 372 if (tracks[t].curtime < bestcur) { 373 bestcur = tracks[t].curtime; 374 besttrk = t; 375 } 376 } 377 if (bestcur == ~0) 378 break; 379 if (verbose > 1) { 380 printf("DELAY %4ld TRACK %2d ", bestcur-now, besttrk); 381 fflush(stdout); 382 } 383 if (now < bestcur) { 384 union { 385 u_int32_t i; 386 u_int8_t b[4]; 387 } u; 388 u_int32_t delta = bestcur - now; 389 delta = (int)((double)delta * tempo / (1000.0*ticks)); 390 u.i = delta; 391 if (delta != 0) { 392 event.arr[0] = SEQ_TIMING; 393 event.arr[1] = TMR_WAIT_REL; 394 event.arr[4] = u.b[0]; 395 event.arr[5] = u.b[1]; 396 event.arr[6] = u.b[2]; 397 event.arr[7] = u.b[3]; 398 send_event(&event); 399 } 400 } 401 now = bestcur; 402 tp = &tracks[besttrk]; 403 byte = *tp->start++; 404 if (byte == MIDI_META) { 405 meta = *tp->start++; 406 mlen = getvar(tp); 407 if (verbose > 1) 408 printf("META %02x (%d)\n", meta, mlen); 409 dometa(meta, tp->start, mlen); 410 tp->start += mlen; 411 } else { 412 if (MIDI_IS_STATUS(byte)) 413 tp->status = byte; 414 else 415 tp->start--; 416 mlen = MIDI_LENGTH(tp->status); 417 msg = tp->start; 418 if (verbose > 1) { 419 if (mlen == 1) 420 printf("MIDI %02x (%d) %02x\n", 421 tp->status, mlen, msg[0]); 422 else 423 printf("MIDI %02x (%d) %02x %02x\n", 424 tp->status, mlen, msg[0], msg[1]); 425 } 426 status = MIDI_GET_STATUS(tp->status); 427 chan = MIDI_GET_CHAN(tp->status); 428 switch (status) { 429 case MIDI_NOTEOFF: 430 case MIDI_NOTEON: 431 case MIDI_KEY_PRESSURE: 432 SEQ_MK_CHN_VOICE(&event, unit, status, chan, 433 msg[0], msg[1]); 434 send_event(&event); 435 break; 436 case MIDI_CTL_CHANGE: 437 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 438 msg[0], 0, msg[1]); 439 send_event(&event); 440 break; 441 case MIDI_PGM_CHANGE: 442 if (sameprogram) 443 break; 444 case MIDI_CHN_PRESSURE: 445 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 446 msg[0], 0, 0); 447 send_event(&event); 448 break; 449 case MIDI_PITCH_BEND: 450 SEQ_MK_CHN_COMMON(&event, unit, status, chan, 451 0, 0, 452 (msg[0] & 0x7f) | 453 ((msg[1] & 0x7f) << 7)); 454 send_event(&event); 455 break; 456 case MIDI_SYSTEM_PREFIX: 457 mlen = getvar(tp); 458 if (tp->status == MIDI_SYSEX_START) 459 send_sysex(tp->start, mlen); 460 else 461 /* Sorry, can't do this yet */; 462 break; 463 default: 464 if (verbose) 465 printf("MIDI event 0x%02x ignored\n", 466 tp->status); 467 } 468 tp->start += mlen; 469 } 470 if (tp->start >= tp->end) 471 tp->curtime = ~0; 472 else 473 tp->curtime += getvar(tp); 474 } 475 if (ioctl(fd, SEQUENCER_SYNC, 0) < 0) 476 err(1, "SEQUENCER_SYNC"); 477 478 ret: 479 free(tracks); 480 } 481 482 int 483 main(argc, argv) 484 int argc; 485 char **argv; 486 { 487 int ch; 488 int listdevs = 0; 489 int example = 0; 490 int nmidi; 491 int t; 492 char *file = DEVMUSIC; 493 struct synth_info info; 494 FILE *f; 495 496 while ((ch = getopt(argc, argv, "?d:f:lmp:qt:vx")) != -1) { 497 switch(ch) { 498 case 'd': 499 unit = atoi(optarg); 500 break; 501 case 'f': 502 file = optarg; 503 break; 504 case 'l': 505 listdevs++; 506 break; 507 case 'm': 508 showmeta++; 509 break; 510 case 'p': 511 sameprogram = atoi(optarg); 512 break; 513 case 'q': 514 play = 0; 515 break; 516 case 't': 517 ttempo = atoi(optarg); 518 break; 519 case 'v': 520 verbose++; 521 break; 522 case 'x': 523 example++; 524 break; 525 case '?': 526 default: 527 usage(); 528 } 529 } 530 argc -= optind; 531 argv += optind; 532 533 fd = open(file, O_WRONLY); 534 if (fd < 0) 535 err(1, "%s", file); 536 if (ioctl(fd, SEQUENCER_NRMIDIS, &nmidi) < 0) 537 err(1, "ioctl(SEQUENCER_NRMIDIS) failed, "); 538 if (nmidi == 0) 539 errx(1, "Sorry, no MIDI devices available\n"); 540 if (listdevs) { 541 for (info.device = 0; info.device < nmidi; info.device++) { 542 if (ioctl(fd, SEQUENCER_INFO, &info) < 0) 543 err(1, "ioctl(SEQUENCER_INFO) failed, "); 544 printf("%d: %s\n", info.device, info.name); 545 } 546 exit(0); 547 } 548 549 /* 550 * The sequencer has two "knobs": the TIMEBASE and the TEMPO. 551 * The delay specified in TMR_WAIT_REL is specified in 552 * sequencer time units. The length of a unit is 553 * 60*1000000 / (TIMEBASE * TEMPO). 554 * Set it to 1ms/unit (adjusted by user tempo changes). 555 */ 556 t = 500 * ttempo / 100; 557 if (ioctl(fd, SEQUENCER_TMR_TIMEBASE, &t) < 0) 558 err(1, "SEQUENCER_TMR_TIMEBASE"); 559 t = 120; 560 if (ioctl(fd, SEQUENCER_TMR_TEMPO, &t) < 0) 561 err(1, "SEQUENCER_TMR_TEMPO"); 562 if (ioctl(fd, SEQUENCER_TMR_START, 0) < 0) 563 err(1, "SEQUENCER_TMR_START"); 564 565 midireset(); 566 if (example) 567 while (example--) 568 playdata(sample, sizeof sample, "<Gubben Noa>"); 569 else if (argc == 0) 570 playfile(stdin, "<stdin>"); 571 else 572 while (argc--) { 573 f = fopen(*argv, "r"); 574 if (f == NULL) 575 err(1, "%s", *argv); 576 else { 577 playfile(f, *argv); 578 fclose(f); 579 } 580 argv++; 581 } 582 583 exit(0); 584 } 585
Indexes created Thu Sep 25 16:09:42 GMT 2025