Annotation of src/usr.bin/aucat/midi.c, Revision 1.34
1.34 ! ratchov 1: /* $OpenBSD: midi.c,v 1.33 2011/05/09 18:03:08 ratchov Exp $ */
1.1 ratchov 2: /*
3: * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: /*
18: * TODO
19: *
1.7 ratchov 20: * use shadow variables (to save NRPNs, LSB of controller)
21: * in the midi merger
1.1 ratchov 22: *
23: * make output and input identical when only one
24: * input is used (fix running status)
25: */
26: #include <stdio.h>
27: #include <stdlib.h>
28: #include <string.h>
29:
30: #include "abuf.h"
31: #include "aproc.h"
1.3 ratchov 32: #include "conf.h"
33: #include "dev.h"
1.1 ratchov 34: #include "midi.h"
1.33 ratchov 35: #include "sysex.h"
1.14 ratchov 36: #ifdef DEBUG
37: #include "dbg.h"
38: #endif
1.1 ratchov 39:
40: /*
41: * input data rate is XFER / TIMO (in bytes per microsecond),
42: * it must be slightly larger than the MIDI standard 3125 bytes/s
43: */
44: #define MIDITHRU_XFER 340
45: #define MIDITHRU_TIMO 100000
46:
1.3 ratchov 47: /*
48: * masks to extract command and channel of status byte
49: */
50: #define MIDI_CMDMASK 0xf0
51: #define MIDI_CHANMASK 0x0f
52:
53: /*
54: * MIDI status bytes of voice messages
55: */
56: #define MIDI_NOFF 0x80 /* note off */
57: #define MIDI_NON 0x90 /* note on */
58: #define MIDI_KAT 0xa0 /* key after touch */
59: #define MIDI_CTL 0xb0 /* controller */
60: #define MIDI_PC 0xc0 /* program change */
61: #define MIDI_CAT 0xd0 /* channel after touch */
62: #define MIDI_BEND 0xe0 /* pitch bend */
1.16 ratchov 63: #define MIDI_ACK 0xfe /* active sensing message */
1.3 ratchov 64:
65: /*
66: * MIDI controller numbers
67: */
68: #define MIDI_CTLVOL 7 /* volume */
69: #define MIDI_CTLPAN 11 /* pan */
70:
71: /*
72: * length of voice and common messages (status byte included)
73: */
1.1 ratchov 74: unsigned voice_len[] = { 3, 3, 3, 3, 2, 2, 3 };
75: unsigned common_len[] = { 0, 2, 3, 2, 0, 0, 1, 1 };
76:
1.7 ratchov 77: /*
1.10 ratchov 78: * send the message stored in of ibuf->r.midi.msg to obuf
1.7 ratchov 79: */
1.1 ratchov 80: void
81: thru_flush(struct aproc *p, struct abuf *ibuf, struct abuf *obuf)
82: {
83: unsigned ocount, itodo;
84: unsigned char *odata, *idata;
85:
1.10 ratchov 86: itodo = ibuf->r.midi.used;
87: idata = ibuf->r.midi.msg;
1.14 ratchov 88: #ifdef DEBUG
89: if (debug_level >= 4) {
90: aproc_dbg(p);
91: dbg_puts(": flushing ");
92: dbg_putu(itodo);
93: dbg_puts(" byte message\n");
94: }
95: #endif
1.1 ratchov 96: while (itodo > 0) {
97: if (!ABUF_WOK(obuf)) {
1.14 ratchov 98: #ifdef DEBUG
1.28 ratchov 99: if (debug_level >= 3) {
1.14 ratchov 100: aproc_dbg(p);
101: dbg_puts(": overrun, discarding ");
102: dbg_putu(obuf->used);
103: dbg_puts(" bytes\n");
104: }
105: #endif
1.1 ratchov 106: abuf_rdiscard(obuf, obuf->used);
107: if (p->u.thru.owner == ibuf)
108: p->u.thru.owner = NULL;
109: return;
110: }
111: odata = abuf_wgetblk(obuf, &ocount, 0);
112: if (ocount > itodo)
113: ocount = itodo;
114: memcpy(odata, idata, ocount);
115: abuf_wcommit(obuf, ocount);
116: itodo -= ocount;
117: idata += ocount;
118: }
1.10 ratchov 119: ibuf->r.midi.used = 0;
1.1 ratchov 120: p->u.thru.owner = ibuf;
121: }
122:
1.7 ratchov 123: /*
124: * send the real-time message (one byte) to obuf, similar to thrui_flush()
125: */
1.1 ratchov 126: void
127: thru_rt(struct aproc *p, struct abuf *ibuf, struct abuf *obuf, unsigned c)
128: {
129: unsigned ocount;
130: unsigned char *odata;
131:
1.14 ratchov 132: #ifdef DEBUG
133: if (debug_level >= 4) {
134: aproc_dbg(p);
135: dbg_puts(": ");
1.19 ratchov 136: dbg_putx(c);
1.14 ratchov 137: dbg_puts(": flushing realtime message\n");
138: }
139: #endif
1.16 ratchov 140: if (c == MIDI_ACK)
141: return;
1.1 ratchov 142: if (!ABUF_WOK(obuf)) {
1.14 ratchov 143: #ifdef DEBUG
1.28 ratchov 144: if (debug_level >= 3) {
1.14 ratchov 145: aproc_dbg(p);
146: dbg_puts(": overrun, discarding ");
147: dbg_putu(obuf->used);
148: dbg_puts(" bytes\n");
149: }
150: #endif
1.1 ratchov 151: abuf_rdiscard(obuf, obuf->used);
152: if (p->u.thru.owner == ibuf)
153: p->u.thru.owner = NULL;
154: }
155: odata = abuf_wgetblk(obuf, &ocount, 0);
156: odata[0] = c;
157: abuf_wcommit(obuf, 1);
158: }
159:
1.7 ratchov 160: /*
161: * parse ibuf contents and store each message into obuf,
162: * use at most ``todo'' bytes (for throttling)
163: */
1.1 ratchov 164: void
165: thru_bcopy(struct aproc *p, struct abuf *ibuf, struct abuf *obuf, unsigned todo)
166: {
167: unsigned char *idata;
168: unsigned c, icount, ioffs;
169:
170: idata = NULL;
171: icount = ioffs = 0;
172: for (;;) {
173: if (icount == 0) {
174: if (todo == 0)
175: break;
176: idata = abuf_rgetblk(ibuf, &icount, ioffs);
177: if (icount > todo)
178: icount = todo;
179: if (icount == 0)
180: break;
181: todo -= icount;
182: ioffs += icount;
183: }
184: c = *idata++;
185: icount--;
186: if (c < 0x80) {
1.10 ratchov 187: if (ibuf->r.midi.idx == 0 && ibuf->r.midi.st) {
188: ibuf->r.midi.msg[ibuf->r.midi.used++] = ibuf->r.midi.st;
189: ibuf->r.midi.idx++;
1.1 ratchov 190: }
1.10 ratchov 191: ibuf->r.midi.msg[ibuf->r.midi.used++] = c;
192: ibuf->r.midi.idx++;
193: if (ibuf->r.midi.idx == ibuf->r.midi.len) {
1.1 ratchov 194: thru_flush(p, ibuf, obuf);
1.10 ratchov 195: if (ibuf->r.midi.st >= 0xf0)
196: ibuf->r.midi.st = 0;
197: ibuf->r.midi.idx = 0;
1.1 ratchov 198: }
1.10 ratchov 199: if (ibuf->r.midi.used == MIDI_MSGMAX) {
200: if (ibuf->r.midi.used == ibuf->r.midi.idx ||
1.1 ratchov 201: p->u.thru.owner == ibuf)
202: thru_flush(p, ibuf, obuf);
203: else
1.10 ratchov 204: ibuf->r.midi.used = 0;
1.1 ratchov 205: }
206: } else if (c < 0xf8) {
1.10 ratchov 207: if (ibuf->r.midi.used == ibuf->r.midi.idx ||
1.1 ratchov 208: p->u.thru.owner == ibuf) {
209: thru_flush(p, ibuf, obuf);
210: } else
1.10 ratchov 211: ibuf->r.midi.used = 0;
212: ibuf->r.midi.msg[0] = c;
213: ibuf->r.midi.used = 1;
214: ibuf->r.midi.len = (c >= 0xf0) ?
1.1 ratchov 215: common_len[c & 7] :
216: voice_len[(c >> 4) & 7];
1.10 ratchov 217: if (ibuf->r.midi.len == 1) {
1.1 ratchov 218: thru_flush(p, ibuf, obuf);
1.10 ratchov 219: ibuf->r.midi.idx = 0;
220: ibuf->r.midi.st = 0;
221: ibuf->r.midi.len = 0;
1.1 ratchov 222: } else {
1.10 ratchov 223: ibuf->r.midi.st = c;
224: ibuf->r.midi.idx = 1;
1.1 ratchov 225: }
226: } else {
227: thru_rt(p, ibuf, obuf, c);
228: }
229: }
230: }
231:
232: int
233: thru_in(struct aproc *p, struct abuf *ibuf)
234: {
235: struct abuf *i, *inext;
236: unsigned todo;
237:
238: if (!ABUF_ROK(ibuf))
239: return 0;
1.10 ratchov 240: if (ibuf->tickets == 0) {
1.14 ratchov 241: #ifdef DEBUG
242: if (debug_level >= 4) {
243: abuf_dbg(ibuf);
244: dbg_puts(": out of tickets, blocking\n");
245: }
246: #endif
1.1 ratchov 247: return 0;
248: }
249: todo = ibuf->used;
1.10 ratchov 250: if (todo > ibuf->tickets)
251: todo = ibuf->tickets;
252: ibuf->tickets -= todo;
1.20 ratchov 253: for (i = LIST_FIRST(&p->outs); i != NULL; i = inext) {
1.1 ratchov 254: inext = LIST_NEXT(i, oent);
255: if (ibuf->duplex == i)
256: continue;
257: thru_bcopy(p, ibuf, i, todo);
258: (void)abuf_flush(i);
259: }
260: abuf_rdiscard(ibuf, todo);
261: return 1;
262: }
263:
264: int
265: thru_out(struct aproc *p, struct abuf *obuf)
266: {
267: return 0;
268: }
269:
270: void
271: thru_eof(struct aproc *p, struct abuf *ibuf)
272: {
1.13 ratchov 273: if (!(p->flags & APROC_QUIT))
1.11 ratchov 274: return;
1.34 ! ratchov 275: if (LIST_EMPTY(&p->ins))
1.11 ratchov 276: aproc_del(p);
1.1 ratchov 277: }
278:
279: void
280: thru_hup(struct aproc *p, struct abuf *obuf)
281: {
1.31 ratchov 282: if (!(p->flags & APROC_QUIT))
283: return;
1.34 ! ratchov 284: if (LIST_EMPTY(&p->ins))
1.31 ratchov 285: aproc_del(p);
1.1 ratchov 286: }
287:
288: void
289: thru_newin(struct aproc *p, struct abuf *ibuf)
290: {
1.10 ratchov 291: ibuf->r.midi.used = 0;
292: ibuf->r.midi.len = 0;
293: ibuf->r.midi.idx = 0;
294: ibuf->r.midi.st = 0;
295: ibuf->tickets = MIDITHRU_XFER;
1.1 ratchov 296: }
297:
298: void
299: thru_done(struct aproc *p)
300: {
301: timo_del(&p->u.thru.timo);
302: }
303:
304: struct aproc_ops thru_ops = {
305: "thru",
306: thru_in,
307: thru_out,
308: thru_eof,
309: thru_hup,
310: thru_newin,
311: NULL, /* newout */
312: NULL, /* ipos */
313: NULL, /* opos */
314: thru_done
315: };
316:
1.7 ratchov 317: /*
318: * call-back invoked periodically to implement throttling at each invocation
319: * gain more ``tickets'' for processing. If one of the buffer was blocked by
320: * the throttelling mechanism, then run it
321: */
1.1 ratchov 322: void
323: thru_cb(void *addr)
324: {
325: struct aproc *p = (struct aproc *)addr;
326: struct abuf *i, *inext;
327: unsigned tickets;
328:
329: timo_add(&p->u.thru.timo, MIDITHRU_TIMO);
330:
1.20 ratchov 331: for (i = LIST_FIRST(&p->ins); i != NULL; i = inext) {
1.1 ratchov 332: inext = LIST_NEXT(i, ient);
1.10 ratchov 333: tickets = i->tickets;
334: i->tickets = MIDITHRU_XFER;
1.1 ratchov 335: if (tickets == 0)
336: abuf_run(i);
337: }
338: }
339:
340: struct aproc *
341: thru_new(char *name)
342: {
343: struct aproc *p;
344:
345: p = aproc_new(&thru_ops, name);
346: p->u.thru.owner = NULL;
347: timo_set(&p->u.thru.timo, thru_cb, p);
348: timo_add(&p->u.thru.timo, MIDITHRU_TIMO);
1.3 ratchov 349: return p;
350: }
351:
1.14 ratchov 352: #ifdef DEBUG
353: void
354: ctl_slotdbg(struct aproc *p, int slot)
355: {
356: struct ctl_slot *s;
357:
358: if (slot < 0) {
1.19 ratchov 359: dbg_puts("none");
1.14 ratchov 360: } else {
361: s = p->u.ctl.slot + slot;
362: dbg_puts(s->name);
363: dbg_putu(s->unit);
1.19 ratchov 364: dbg_puts("(");
1.14 ratchov 365: dbg_putu(s->vol);
1.19 ratchov 366: dbg_puts(")/");
1.14 ratchov 367: switch (s->tstate) {
368: case CTL_OFF:
369: dbg_puts("off");
370: break;
371: case CTL_RUN:
372: dbg_puts("run");
373: break;
374: case CTL_START:
375: dbg_puts("sta");
376: break;
377: case CTL_STOP:
378: dbg_puts("stp");
379: break;
380: default:
381: dbg_puts("unk");
382: break;
383: }
384: }
385: }
386: #endif
1.12 ratchov 387:
1.7 ratchov 388: /*
1.33 ratchov 389: * send a message to the given output
390: */
391: void
392: ctl_copymsg(struct abuf *obuf, unsigned char *msg, unsigned len)
393: {
394: unsigned ocount, itodo;
395: unsigned char *odata, *idata;
396:
397: itodo = len;
398: idata = msg;
399: while (itodo > 0) {
400: if (!ABUF_WOK(obuf)) {
401: #ifdef DEBUG
402: if (debug_level >= 3) {
403: abuf_dbg(obuf);
404: dbg_puts(": overrun, discarding ");
405: dbg_putu(obuf->used);
406: dbg_puts(" bytes\n");
407: }
408: #endif
409: abuf_rdiscard(obuf, obuf->used);
410: }
411: odata = abuf_wgetblk(obuf, &ocount, 0);
412: if (ocount > itodo)
413: ocount = itodo;
414: #ifdef DEBUG
415: if (debug_level >= 4) {
416: abuf_dbg(obuf);
417: dbg_puts(": stored ");
418: dbg_putu(ocount);
419: dbg_puts(" bytes\n");
420: }
421: #endif
422: memcpy(odata, idata, ocount);
423: abuf_wcommit(obuf, ocount);
424: itodo -= ocount;
425: idata += ocount;
426: }
427: }
428:
429: /*
1.7 ratchov 430: * broadcast a message to all output buffers on the behalf of ibuf.
431: * ie. don't sent back the message to the sender
432: */
1.3 ratchov 433: void
434: ctl_sendmsg(struct aproc *p, struct abuf *ibuf, unsigned char *msg, unsigned len)
435: {
436: struct abuf *i, *inext;
437:
1.20 ratchov 438: for (i = LIST_FIRST(&p->outs); i != NULL; i = inext) {
1.3 ratchov 439: inext = LIST_NEXT(i, oent);
1.19 ratchov 440: if (i->duplex && i->duplex == ibuf)
1.3 ratchov 441: continue;
1.33 ratchov 442: ctl_copymsg(i, msg, len);
1.3 ratchov 443: (void)abuf_flush(i);
444: }
445: }
446:
1.7 ratchov 447: /*
1.13 ratchov 448: * send a quarter frame MTC message
449: */
450: void
451: ctl_qfr(struct aproc *p)
452: {
453: unsigned char buf[2];
454: unsigned data;
455:
456: switch (p->u.ctl.qfr) {
457: case 0:
458: data = p->u.ctl.fr & 0xf;
459: break;
460: case 1:
461: data = p->u.ctl.fr >> 4;
462: break;
463: case 2:
464: data = p->u.ctl.sec & 0xf;
465: break;
466: case 3:
467: data = p->u.ctl.sec >> 4;
468: break;
469: case 4:
470: data = p->u.ctl.min & 0xf;
471: break;
472: case 5:
473: data = p->u.ctl.min >> 4;
474: break;
475: case 6:
476: data = p->u.ctl.hr & 0xf;
477: break;
478: case 7:
479: data = (p->u.ctl.hr >> 4) | (p->u.ctl.fps_id << 1);
480: /*
481: * tick messages are sent 2 frames ahead
482: */
483: p->u.ctl.fr += 2;
484: if (p->u.ctl.fr < p->u.ctl.fps)
485: break;
486: p->u.ctl.fr -= p->u.ctl.fps;
487: p->u.ctl.sec++;
488: if (p->u.ctl.sec < 60)
1.32 deraadt 489: break;
1.13 ratchov 490: p->u.ctl.sec = 0;
491: p->u.ctl.min++;
492: if (p->u.ctl.min < 60)
493: break;
494: p->u.ctl.min = 0;
495: p->u.ctl.hr++;
496: if (p->u.ctl.hr < 24)
497: break;
498: p->u.ctl.hr = 0;
499: break;
500: default:
501: /* NOTREACHED */
502: data = 0;
503: }
504: buf[0] = 0xf1;
505: buf[1] = (p->u.ctl.qfr << 4) | data;
506: p->u.ctl.qfr++;
507: p->u.ctl.qfr &= 7;
508: ctl_sendmsg(p, NULL, buf, 2);
509: }
510:
511: /*
512: * send a full frame MTC message
513: */
514: void
515: ctl_full(struct aproc *p)
516: {
517: unsigned char buf[10];
518: unsigned origin = p->u.ctl.origin;
519: unsigned fps = p->u.ctl.fps;
520:
521: p->u.ctl.hr = (origin / (3600 * MTC_SEC)) % 24;
522: p->u.ctl.min = (origin / (60 * MTC_SEC)) % 60;
523: p->u.ctl.sec = (origin / MTC_SEC) % 60;
524: p->u.ctl.fr = (origin / (MTC_SEC / fps)) % fps;
525:
526: buf[0] = 0xf0;
527: buf[1] = 0x7f;
528: buf[2] = 0x7f;
529: buf[3] = 0x01;
530: buf[4] = 0x01;
531: buf[5] = p->u.ctl.hr | (p->u.ctl.fps_id << 5);
532: buf[6] = p->u.ctl.min;
533: buf[7] = p->u.ctl.sec;
534: buf[8] = p->u.ctl.fr;
535: buf[9] = 0xf7;
536: p->u.ctl.qfr = 0;
537: ctl_sendmsg(p, NULL, buf, 10);
538: }
539:
1.33 ratchov 540: void
541: ctl_msg_vol(struct aproc *p, int slot, char *msg)
542: {
543: struct ctl_slot *s;
544:
545: s = p->u.ctl.slot + slot;
546: msg[0] = MIDI_CTL | slot;
547: msg[1] = MIDI_CTLVOL;
548: msg[2] = s->vol;
549: }
550:
1.13 ratchov 551: /*
1.12 ratchov 552: * find the best matching free slot index (ie midi channel).
553: * return -1, if there are no free slots anymore
1.7 ratchov 554: */
1.3 ratchov 555: int
1.12 ratchov 556: ctl_getidx(struct aproc *p, char *who)
1.3 ratchov 557: {
558: char *s;
559: struct ctl_slot *slot;
1.4 ratchov 560: char name[CTL_NAMEMAX];
561: unsigned i, unit, umap = 0;
1.6 ratchov 562: unsigned ser, bestser, bestidx;
1.3 ratchov 563:
1.4 ratchov 564: /*
565: * create a ``valid'' control name (lowcase, remove [^a-z], trucate)
566: */
1.5 ratchov 567: for (i = 0, s = who; ; s++) {
1.4 ratchov 568: if (i == CTL_NAMEMAX - 1 || *s == '\0') {
569: name[i] = '\0';
570: break;
571: } else if (*s >= 'A' && *s <= 'Z') {
572: name[i++] = *s + 'a' - 'A';
573: } else if (*s >= 'a' && *s <= 'z')
574: name[i++] = *s;
575: }
576: if (i == 0)
577: strlcpy(name, "noname", CTL_NAMEMAX);
578:
579: /*
580: * find the instance number of the control name
581: */
582: for (i = 0, slot = p->u.ctl.slot; i < CTL_NSLOT; i++, slot++) {
1.12 ratchov 583: if (slot->ops == NULL)
1.4 ratchov 584: continue;
585: if (strcmp(slot->name, name) == 0)
586: umap |= (1 << i);
587: }
1.12 ratchov 588: for (unit = 0; ; unit++) {
1.29 ratchov 589: if (unit == CTL_NSLOT) {
590: #ifdef DEBUG
591: if (debug_level >= 1) {
592: dbg_puts(name);
1.30 ratchov 593: dbg_puts(": too many instances\n");
1.29 ratchov 594: }
595: #endif
1.3 ratchov 596: return -1;
1.29 ratchov 597: }
1.12 ratchov 598: if ((umap & (1 << unit)) == 0)
1.3 ratchov 599: break;
600: }
1.29 ratchov 601:
1.4 ratchov 602: /*
603: * find a free controller slot with the same name/unit
604: */
605: for (i = 0, slot = p->u.ctl.slot; i < CTL_NSLOT; i++, slot++) {
1.12 ratchov 606: if (slot->ops == NULL &&
1.4 ratchov 607: strcmp(slot->name, name) == 0 &&
608: slot->unit == unit) {
1.14 ratchov 609: #ifdef DEBUG
610: if (debug_level >= 3) {
1.29 ratchov 611: dbg_puts(name);
612: dbg_putu(unit);
1.14 ratchov 613: dbg_puts(": found slot ");
614: dbg_putu(i);
615: dbg_puts("\n");
616: }
617: #endif
1.4 ratchov 618: return i;
619: }
620: }
621:
622: /*
1.6 ratchov 623: * couldn't find a matching slot, pick oldest free slot
1.12 ratchov 624: * and set its name/unit
1.4 ratchov 625: */
1.6 ratchov 626: bestser = 0;
627: bestidx = CTL_NSLOT;
628: for (i = 0, slot = p->u.ctl.slot; i < CTL_NSLOT; i++, slot++) {
1.12 ratchov 629: if (slot->ops != NULL)
1.6 ratchov 630: continue;
631: ser = p->u.ctl.serial - slot->serial;
632: if (ser > bestser) {
633: bestser = ser;
634: bestidx = i;
635: }
1.3 ratchov 636: }
1.29 ratchov 637: if (bestidx == CTL_NSLOT) {
638: #ifdef DEBUG
639: if (debug_level >= 1) {
640: dbg_puts(name);
641: dbg_putu(unit);
642: dbg_puts(": out of mixer slots\n");
643: }
644: #endif
1.6 ratchov 645: return -1;
1.29 ratchov 646: }
1.6 ratchov 647: slot = p->u.ctl.slot + bestidx;
1.22 ratchov 648: if (slot->name[0] != '\0')
649: slot->vol = MIDI_MAXCTL;
1.4 ratchov 650: strlcpy(slot->name, name, CTL_NAMEMAX);
1.6 ratchov 651: slot->serial = p->u.ctl.serial++;
1.4 ratchov 652: slot->unit = unit;
1.14 ratchov 653: #ifdef DEBUG
654: if (debug_level >= 3) {
1.29 ratchov 655: dbg_puts(name);
656: dbg_putu(unit);
1.14 ratchov 657: dbg_puts(": overwritten slot ");
658: dbg_putu(bestidx);
659: dbg_puts("\n");
660: }
661: #endif
1.6 ratchov 662: return bestidx;
1.3 ratchov 663: }
664:
1.7 ratchov 665: /*
1.13 ratchov 666: * check that all clients controlled by MMC are ready to start,
667: * if so, start them all but the caller
668: */
669: int
670: ctl_trystart(struct aproc *p, int caller)
671: {
672: unsigned i;
673: struct ctl_slot *s;
674:
675: if (p->u.ctl.tstate != CTL_START) {
1.14 ratchov 676: #ifdef DEBUG
1.19 ratchov 677: if (debug_level >= 3) {
678: ctl_slotdbg(p, caller);
679: dbg_puts(": server not started, delayd\n");
680: }
1.14 ratchov 681: #endif
1.13 ratchov 682: return 0;
683: }
684: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
685: if (!s->ops || i == caller)
686: continue;
687: if (s->tstate != CTL_OFF && s->tstate != CTL_START) {
1.14 ratchov 688: #ifdef DEBUG
1.19 ratchov 689: if (debug_level >= 3) {
690: ctl_slotdbg(p, i);
691: dbg_puts(": not ready, server delayed\n");
692: }
1.14 ratchov 693: #endif
1.13 ratchov 694: return 0;
695: }
696: }
697: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
698: if (!s->ops || i == caller)
699: continue;
700: if (s->tstate == CTL_START) {
1.14 ratchov 701: #ifdef DEBUG
1.19 ratchov 702: if (debug_level >= 3) {
703: ctl_slotdbg(p, i);
704: dbg_puts(": started\n");
705: }
1.14 ratchov 706: #endif
1.13 ratchov 707: s->tstate = CTL_RUN;
708: s->ops->start(s->arg);
709: }
710: }
711: if (caller >= 0)
712: p->u.ctl.slot[caller].tstate = CTL_RUN;
713: p->u.ctl.tstate = CTL_RUN;
1.25 ratchov 714: p->u.ctl.delta = MTC_SEC * dev_getpos(p->u.ctl.dev);
715: if (p->u.ctl.dev->rate % (30 * 4 * p->u.ctl.dev->round) == 0) {
1.13 ratchov 716: p->u.ctl.fps_id = MTC_FPS_30;
717: p->u.ctl.fps = 30;
1.25 ratchov 718: } else if (p->u.ctl.dev->rate % (25 * 4 * p->u.ctl.dev->round) == 0) {
1.13 ratchov 719: p->u.ctl.fps_id = MTC_FPS_25;
720: p->u.ctl.fps = 25;
721: } else {
722: p->u.ctl.fps_id = MTC_FPS_24;
723: p->u.ctl.fps = 24;
724: }
1.14 ratchov 725: #ifdef DEBUG
1.19 ratchov 726: if (debug_level >= 3) {
727: ctl_slotdbg(p, caller);
728: dbg_puts(": started server at ");
729: dbg_puti(p->u.ctl.delta);
730: dbg_puts(", ");
731: dbg_puti(p->u.ctl.fps);
732: dbg_puts(" mtc fps\n");
733: }
1.14 ratchov 734: #endif
1.25 ratchov 735: dev_wakeup(p->u.ctl.dev);
1.13 ratchov 736: ctl_full(p);
737: return 1;
738: }
739:
740: /*
1.12 ratchov 741: * allocate a new slot and register the given call-backs
742: */
743: int
1.13 ratchov 744: ctl_slotnew(struct aproc *p, char *who, struct ctl_ops *ops, void *arg, int tr)
1.12 ratchov 745: {
746: int idx;
747: struct ctl_slot *s;
1.33 ratchov 748: unsigned char msg[sizeof(struct sysex)];
1.12 ratchov 749:
1.19 ratchov 750: if (!APROC_OK(p)) {
751: #ifdef DEBUG
752: if (debug_level >= 1) {
753: dbg_puts(who);
754: dbg_puts(": MIDI control not available\n");
755: }
756: #endif
1.13 ratchov 757: return -1;
1.19 ratchov 758: }
1.12 ratchov 759: idx = ctl_getidx(p, who);
760: if (idx < 0)
761: return -1;
762:
763: s = p->u.ctl.slot + idx;
764: s->ops = ops;
765: s->arg = arg;
1.13 ratchov 766: s->tstate = tr ? CTL_STOP : CTL_OFF;
1.12 ratchov 767: s->ops->vol(s->arg, s->vol);
1.33 ratchov 768: ctl_msg_vol(p, idx, msg);
769: ctl_sendmsg(p, NULL, msg, 3);
1.12 ratchov 770: return idx;
771: }
772:
773: /*
1.7 ratchov 774: * release the given slot
775: */
1.3 ratchov 776: void
777: ctl_slotdel(struct aproc *p, int index)
778: {
1.13 ratchov 779: unsigned i;
780: struct ctl_slot *s;
781:
1.19 ratchov 782: if (!APROC_OK(p))
1.13 ratchov 783: return;
1.12 ratchov 784: p->u.ctl.slot[index].ops = NULL;
1.13 ratchov 785: if (!(p->flags & APROC_QUIT))
786: return;
787: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
788: if (s->ops)
789: return;
790: }
1.34 ! ratchov 791: if (LIST_EMPTY(&p->ins))
1.13 ratchov 792: aproc_del(p);
793: }
794:
795: /*
796: * called at every clock tick by the mixer, delta is positive, unless
797: * there's an overrun/underrun
798: */
799: void
800: ctl_ontick(struct aproc *p, int delta)
801: {
802: int qfrlen;
803:
804: /*
805: * don't send ticks before the start signal
806: */
807: if (p->u.ctl.tstate != CTL_RUN)
808: return;
809:
810: p->u.ctl.delta += delta * MTC_SEC;
811:
812: /*
813: * don't send ticks during the count-down
814: */
815: if (p->u.ctl.delta < 0)
816: return;
817:
1.25 ratchov 818: qfrlen = p->u.ctl.dev->rate * (MTC_SEC / (4 * p->u.ctl.fps));
1.13 ratchov 819: while (p->u.ctl.delta >= qfrlen) {
820: ctl_qfr(p);
821: p->u.ctl.delta -= qfrlen;
822: }
1.3 ratchov 823: }
824:
1.7 ratchov 825: /*
826: * notifty the mixer that volume changed, called by whom allocad the slot using
827: * ctl_slotnew(). Note: it doesn't make sens to call this from within the
828: * call-back.
829: */
1.3 ratchov 830: void
831: ctl_slotvol(struct aproc *p, int slot, unsigned vol)
832: {
833: unsigned char msg[3];
834:
1.19 ratchov 835: if (!APROC_OK(p))
1.13 ratchov 836: return;
1.14 ratchov 837: #ifdef DEBUG
838: if (debug_level >= 3) {
839: ctl_slotdbg(p, slot);
840: dbg_puts(": changing volume to ");
841: dbg_putu(vol);
842: dbg_puts("\n");
843: }
844: #endif
1.7 ratchov 845: p->u.ctl.slot[slot].vol = vol;
1.33 ratchov 846: ctl_msg_vol(p, slot, msg);
1.3 ratchov 847: ctl_sendmsg(p, NULL, msg, 3);
848: }
849:
1.7 ratchov 850: /*
1.13 ratchov 851: * notify the MMC layer that the stream is attempting
852: * to start. If other streams are not ready, 0 is returned meaning
853: * that the stream should wait. If other streams are ready, they
854: * are started, and the caller should start immediately.
855: */
856: int
857: ctl_slotstart(struct aproc *p, int slot)
858: {
859: struct ctl_slot *s = p->u.ctl.slot + slot;
860:
1.19 ratchov 861: if (!APROC_OK(p))
1.13 ratchov 862: return 1;
863: if (s->tstate == CTL_OFF || p->u.ctl.tstate == CTL_OFF)
864: return 1;
865:
866: /*
867: * if the server already started (the client missed the
868: * start rendez-vous) or the server is stopped, then
869: * tag the client as ``wanting to start''
870: */
871: s->tstate = CTL_START;
872: return ctl_trystart(p, slot);
873: }
874:
875: /*
876: * notify the MMC layer that the stream no longer is trying to
877: * start (or that it just stopped), meaning that its ``start'' call-back
878: * shouldn't be called anymore
879: */
880: void
881: ctl_slotstop(struct aproc *p, int slot)
882: {
883: struct ctl_slot *s = p->u.ctl.slot + slot;
884:
1.19 ratchov 885: if (!APROC_OK(p))
1.13 ratchov 886: return;
887: /*
888: * tag the stream as not trying to start,
889: * unless MMC is turned off
890: */
891: if (s->tstate != CTL_OFF)
892: s->tstate = CTL_STOP;
893: }
894:
895: /*
1.19 ratchov 896: * start all slots simultaneously
897: */
898: void
899: ctl_start(struct aproc *p)
900: {
901: if (!APROC_OK(p))
902: return;
903: if (p->u.ctl.tstate == CTL_STOP) {
904: p->u.ctl.tstate = CTL_START;
905: (void)ctl_trystart(p, -1);
906: #ifdef DEBUG
907: } else {
908: if (debug_level >= 3) {
909: aproc_dbg(p);
910: dbg_puts(": ignoring mmc start\n");
911: }
912: #endif
913: }
914: }
915:
916: /*
917: * stop all slots simultaneously
918: */
919: void
920: ctl_stop(struct aproc *p)
921: {
922: unsigned i;
923: struct ctl_slot *s;
924:
925: if (!APROC_OK(p))
926: return;
927: switch (p->u.ctl.tstate) {
928: case CTL_START:
929: p->u.ctl.tstate = CTL_STOP;
930: return;
931: case CTL_RUN:
932: p->u.ctl.tstate = CTL_STOP;
933: break;
934: default:
935: #ifdef DEBUG
936: if (debug_level >= 3) {
937: aproc_dbg(p);
938: dbg_puts(": ignored mmc stop\n");
939: }
940: #endif
941: return;
942: }
943: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
944: if (!s->ops)
945: continue;
946: if (s->tstate == CTL_RUN) {
947: #ifdef DEBUG
948: if (debug_level >= 3) {
949: ctl_slotdbg(p, i);
950: dbg_puts(": requested to stop\n");
951: }
952: #endif
953: s->ops->stop(s->arg);
954: }
955: }
956: }
957:
958: /*
959: * relocate all slots simultaneously
960: */
961: void
962: ctl_loc(struct aproc *p, unsigned origin)
963: {
964: unsigned i, tstate;
965: struct ctl_slot *s;
966:
967: if (!APROC_OK(p))
968: return;
969: #ifdef DEBUG
970: if (debug_level >= 2) {
971: dbg_puts("server relocated to ");
972: dbg_putu(origin);
973: dbg_puts("\n");
974: }
975: #endif
976: tstate = p->u.ctl.tstate;
977: if (tstate == CTL_RUN)
978: ctl_stop(p);
979: p->u.ctl.origin = origin;
980: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
981: if (!s->ops)
982: continue;
983: s->ops->loc(s->arg, p->u.ctl.origin);
984: }
985: if (tstate == CTL_RUN)
986: ctl_start(p);
987: }
988:
989: /*
990: * check if there are controlled streams
991: */
992: int
993: ctl_idle(struct aproc *p)
994: {
995: unsigned i;
996: struct ctl_slot *s;
997:
998: if (!APROC_OK(p))
999: return 1;
1000: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
1001: if (s->ops)
1002: return 0;
1003: }
1004: return 1;
1005: }
1006:
1007: /*
1.7 ratchov 1008: * handle a MIDI event received from ibuf
1009: */
1.3 ratchov 1010: void
1011: ctl_ev(struct aproc *p, struct abuf *ibuf)
1012: {
1013: unsigned chan;
1.5 ratchov 1014: struct ctl_slot *slot;
1.33 ratchov 1015: struct sysex *x;
1016: unsigned fps, len;
1.14 ratchov 1017: #ifdef DEBUG
1018: unsigned i;
1019:
1020: if (debug_level >= 3) {
1021: abuf_dbg(ibuf);
1022: dbg_puts(": got event:");
1023: for (i = 0; i < ibuf->r.midi.idx; i++) {
1024: dbg_puts(" ");
1025: dbg_putx(ibuf->r.midi.msg[i]);
1026: }
1027: dbg_puts("\n");
1028: }
1029: #endif
1.10 ratchov 1030: if ((ibuf->r.midi.msg[0] & MIDI_CMDMASK) == MIDI_CTL &&
1.33 ratchov 1031: (ibuf->r.midi.msg[1] == MIDI_CTLVOL)) {
1.10 ratchov 1032: chan = ibuf->r.midi.msg[0] & MIDI_CHANMASK;
1.3 ratchov 1033: if (chan >= CTL_NSLOT)
1034: return;
1.5 ratchov 1035: slot = p->u.ctl.slot + chan;
1.22 ratchov 1036: slot->vol = ibuf->r.midi.msg[2];
1.12 ratchov 1037: if (slot->ops == NULL)
1.3 ratchov 1038: return;
1.12 ratchov 1039: slot->ops->vol(slot->arg, slot->vol);
1.10 ratchov 1040: ctl_sendmsg(p, ibuf, ibuf->r.midi.msg, ibuf->r.midi.len);
1.3 ratchov 1041: }
1.33 ratchov 1042: x = (struct sysex *)ibuf->r.midi.msg;
1043: len = ibuf->r.midi.idx;
1044: if (x->start != SYSEX_START)
1045: return;
1046: if (len < SYSEX_SIZE(empty))
1047: return;
1048: switch (x->type) {
1049: case SYSEX_TYPE_RT:
1050: if (x->id0 != SYSEX_MMC)
1051: return;
1052: switch (x->id1) {
1053: case SYSEX_MMC_STOP:
1054: if (len != SYSEX_SIZE(stop))
1055: return;
1.14 ratchov 1056: #ifdef DEBUG
1.19 ratchov 1057: if (debug_level >= 3) {
1.14 ratchov 1058: abuf_dbg(ibuf);
1059: dbg_puts(": mmc stop\n");
1060: }
1061: #endif
1.19 ratchov 1062: ctl_stop(p);
1.13 ratchov 1063: break;
1.33 ratchov 1064: case SYSEX_MMC_START:
1065: if (len != SYSEX_SIZE(start))
1066: return;
1.14 ratchov 1067: #ifdef DEBUG
1.19 ratchov 1068: if (debug_level >= 3) {
1.14 ratchov 1069: abuf_dbg(ibuf);
1070: dbg_puts(": mmc start\n");
1071: }
1072: #endif
1.19 ratchov 1073: ctl_start(p);
1.13 ratchov 1074: break;
1.33 ratchov 1075: case SYSEX_MMC_LOC:
1076: if (len != SYSEX_SIZE(loc) ||
1077: x->u.loc.len != SYSEX_MMC_LOC_LEN ||
1078: x->u.loc.cmd != SYSEX_MMC_LOC_CMD)
1079: return;
1080: switch (x->u.loc.hr >> 5) {
1081: case MTC_FPS_24:
1082: fps = 24;
1083: break;
1084: case MTC_FPS_25:
1085: fps = 25;
1086: break;
1087: case MTC_FPS_30:
1088: fps = 30;
1089: break;
1090: default:
1091: p->u.ctl.origin = 0;
1092: return;
1093: }
1094: ctl_loc(p,
1095: (x->u.loc.hr & 0x1f) * 3600 * MTC_SEC +
1096: x->u.loc.min * 60 * MTC_SEC +
1097: x->u.loc.sec * MTC_SEC +
1098: x->u.loc.fr * (MTC_SEC / fps) +
1099: x->u.loc.cent * (MTC_SEC / 100 / fps));
1.13 ratchov 1100: break;
1101: }
1.33 ratchov 1102: break;
1.13 ratchov 1103: }
1.3 ratchov 1104: }
1105:
1106: int
1107: ctl_in(struct aproc *p, struct abuf *ibuf)
1108: {
1109: unsigned char *idata;
1110: unsigned c, i, icount;
1111:
1112: if (!ABUF_ROK(ibuf))
1113: return 0;
1114: idata = abuf_rgetblk(ibuf, &icount, 0);
1115: for (i = 0; i < icount; i++) {
1116: c = *idata++;
1.8 ratchov 1117: if (c >= 0xf8) {
1118: /* clock events not used yet */
1119: } else if (c >= 0xf0) {
1.10 ratchov 1120: if (ibuf->r.midi.st == 0xf0 && c == 0xf7 &&
1121: ibuf->r.midi.idx < MIDI_MSGMAX) {
1122: ibuf->r.midi.msg[ibuf->r.midi.idx++] = c;
1.8 ratchov 1123: ctl_ev(p, ibuf);
1124: continue;
1125: }
1.10 ratchov 1126: ibuf->r.midi.msg[0] = c;
1127: ibuf->r.midi.len = common_len[c & 7];
1128: ibuf->r.midi.st = c;
1129: ibuf->r.midi.idx = 1;
1.3 ratchov 1130: } else if (c >= 0x80) {
1.10 ratchov 1131: ibuf->r.midi.msg[0] = c;
1132: ibuf->r.midi.len = voice_len[(c >> 4) & 7];
1133: ibuf->r.midi.st = c;
1134: ibuf->r.midi.idx = 1;
1135: } else if (ibuf->r.midi.st) {
1136: if (ibuf->r.midi.idx == MIDI_MSGMAX)
1.8 ratchov 1137: continue;
1.10 ratchov 1138: if (ibuf->r.midi.idx == 0)
1139: ibuf->r.midi.msg[ibuf->r.midi.idx++] = ibuf->r.midi.st;
1140: ibuf->r.midi.msg[ibuf->r.midi.idx++] = c;
1141: if (ibuf->r.midi.idx == ibuf->r.midi.len) {
1.3 ratchov 1142: ctl_ev(p, ibuf);
1.10 ratchov 1143: ibuf->r.midi.idx = 0;
1.3 ratchov 1144: }
1145: }
1146: }
1147: abuf_rdiscard(ibuf, icount);
1148: return 1;
1149: }
1150:
1151: int
1152: ctl_out(struct aproc *p, struct abuf *obuf)
1153: {
1154: return 0;
1155: }
1156:
1157: void
1158: ctl_eof(struct aproc *p, struct abuf *ibuf)
1159: {
1.13 ratchov 1160: unsigned i;
1161: struct ctl_slot *s;
1162:
1163: if (!(p->flags & APROC_QUIT))
1164: return;
1165: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
1.27 ratchov 1166: if (s->ops != NULL)
1167: s->ops->quit(s->arg);
1.13 ratchov 1168: }
1.34 ! ratchov 1169: if (LIST_EMPTY(&p->ins))
1.13 ratchov 1170: aproc_del(p);
1.3 ratchov 1171: }
1172:
1173: void
1174: ctl_hup(struct aproc *p, struct abuf *obuf)
1175: {
1.13 ratchov 1176: unsigned i;
1177: struct ctl_slot *s;
1178:
1179: if (!(p->flags & APROC_QUIT))
1180: return;
1181: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
1182: if (s->ops)
1183: return;
1184: }
1.34 ! ratchov 1185: if (LIST_EMPTY(&p->ins))
1.13 ratchov 1186: aproc_del(p);
1.3 ratchov 1187: }
1188:
1189: void
1190: ctl_newin(struct aproc *p, struct abuf *ibuf)
1191: {
1.10 ratchov 1192: ibuf->r.midi.used = 0;
1193: ibuf->r.midi.len = 0;
1194: ibuf->r.midi.idx = 0;
1195: ibuf->r.midi.st = 0;
1.3 ratchov 1196: }
1197:
1198: void
1199: ctl_done(struct aproc *p)
1200: {
1.14 ratchov 1201: unsigned i;
1202: struct ctl_slot *s;
1203:
1204: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
1.25 ratchov 1205: if (s->ops != NULL)
1206: s->ops->quit(s->arg);
1.14 ratchov 1207: }
1.3 ratchov 1208: }
1209:
1210: struct aproc_ops ctl_ops = {
1211: "ctl",
1212: ctl_in,
1213: ctl_out,
1214: ctl_eof,
1215: ctl_hup,
1216: ctl_newin,
1217: NULL, /* newout */
1218: NULL, /* ipos */
1219: NULL, /* opos */
1220: ctl_done
1221: };
1222:
1223: struct aproc *
1.25 ratchov 1224: ctl_new(char *name, struct dev *dev)
1.3 ratchov 1225: {
1226: struct aproc *p;
1.5 ratchov 1227: struct ctl_slot *s;
1.3 ratchov 1228: unsigned i;
1229:
1230: p = aproc_new(&ctl_ops, name);
1.25 ratchov 1231: p->u.ctl.dev = dev;
1.6 ratchov 1232: p->u.ctl.serial = 0;
1.13 ratchov 1233: p->u.ctl.tstate = CTL_STOP;
1.5 ratchov 1234: for (i = 0, s = p->u.ctl.slot; i < CTL_NSLOT; i++, s++) {
1.3 ratchov 1235: p->u.ctl.slot[i].unit = i;
1.12 ratchov 1236: p->u.ctl.slot[i].ops = NULL;
1.7 ratchov 1237: p->u.ctl.slot[i].vol = MIDI_MAXCTL;
1.13 ratchov 1238: p->u.ctl.slot[i].tstate = CTL_OFF;
1.6 ratchov 1239: p->u.ctl.slot[i].serial = p->u.ctl.serial++;
1.22 ratchov 1240: p->u.ctl.slot[i].name[0] = '\0';
1.3 ratchov 1241: }
1.1 ratchov 1242: return p;
1243: }
![[BACK]](/icons/back.gif){kind=icon}
Return to midi.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / aucat