1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
5 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006
6 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org>
7 * Portions Copyright (c) Luigi Rizzo <luigi@FreeBSD.org> - 1997-99
8 * All rights reserved.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifdef HAVE_KERNEL_OPTION_HEADERS
33 #include "opt_snd.h"
34 #endif
35
36 #include <dev/sound/pcm/sound.h>
37 #include <dev/sound/pcm/vchan.h>
38
39 #include "feeder_if.h"
40
41 int report_soft_formats = 1;
42 SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_formats, CTLFLAG_RW,
43 &report_soft_formats, 0, "report software-emulated formats");
44
45 int report_soft_matrix = 1;
46 SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_matrix, CTLFLAG_RW,
47 &report_soft_matrix, 0, "report software-emulated channel matrixing");
48
49 int chn_latency = CHN_LATENCY_DEFAULT;
50
51 static int
sysctl_hw_snd_latency(SYSCTL_HANDLER_ARGS)52 sysctl_hw_snd_latency(SYSCTL_HANDLER_ARGS)
53 {
54 int err, val;
55
56 val = chn_latency;
57 err = sysctl_handle_int(oidp, &val, 0, req);
58 if (err != 0 || req->newptr == NULL)
59 return err;
60 if (val < CHN_LATENCY_MIN || val > CHN_LATENCY_MAX)
61 err = EINVAL;
62 else
63 chn_latency = val;
64
65 return err;
66 }
67 SYSCTL_PROC(_hw_snd, OID_AUTO, latency,
68 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 0, sizeof(int),
69 sysctl_hw_snd_latency, "I",
70 "buffering latency (0=low ... 10=high)");
71
72 int chn_latency_profile = CHN_LATENCY_PROFILE_DEFAULT;
73
74 static int
sysctl_hw_snd_latency_profile(SYSCTL_HANDLER_ARGS)75 sysctl_hw_snd_latency_profile(SYSCTL_HANDLER_ARGS)
76 {
77 int err, val;
78
79 val = chn_latency_profile;
80 err = sysctl_handle_int(oidp, &val, 0, req);
81 if (err != 0 || req->newptr == NULL)
82 return err;
83 if (val < CHN_LATENCY_PROFILE_MIN || val > CHN_LATENCY_PROFILE_MAX)
84 err = EINVAL;
85 else
86 chn_latency_profile = val;
87
88 return err;
89 }
90 SYSCTL_PROC(_hw_snd, OID_AUTO, latency_profile,
91 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 0, sizeof(int),
92 sysctl_hw_snd_latency_profile, "I",
93 "buffering latency profile (0=aggressive 1=safe)");
94
95 static int chn_timeout = CHN_TIMEOUT;
96
97 static int
sysctl_hw_snd_timeout(SYSCTL_HANDLER_ARGS)98 sysctl_hw_snd_timeout(SYSCTL_HANDLER_ARGS)
99 {
100 int err, val;
101
102 val = chn_timeout;
103 err = sysctl_handle_int(oidp, &val, 0, req);
104 if (err != 0 || req->newptr == NULL)
105 return err;
106 if (val < CHN_TIMEOUT_MIN || val > CHN_TIMEOUT_MAX)
107 err = EINVAL;
108 else
109 chn_timeout = val;
110
111 return err;
112 }
113 SYSCTL_PROC(_hw_snd, OID_AUTO, timeout,
114 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 0, sizeof(int),
115 sysctl_hw_snd_timeout, "I",
116 "interrupt timeout (1 - 10) seconds");
117
118 static int chn_vpc_autoreset = 1;
119 SYSCTL_INT(_hw_snd, OID_AUTO, vpc_autoreset, CTLFLAG_RWTUN,
120 &chn_vpc_autoreset, 0, "automatically reset channels volume to 0db");
121
122 static int chn_vol_0db_pcm = SND_VOL_0DB_PCM;
123
124 static void
chn_vpc_proc(int reset,int db)125 chn_vpc_proc(int reset, int db)
126 {
127 struct snddev_info *d;
128 struct pcm_channel *c;
129 int i;
130
131 for (i = 0; pcm_devclass != NULL &&
132 i < devclass_get_maxunit(pcm_devclass); i++) {
133 d = devclass_get_softc(pcm_devclass, i);
134 if (!PCM_REGISTERED(d))
135 continue;
136 PCM_LOCK(d);
137 PCM_WAIT(d);
138 PCM_ACQUIRE(d);
139 CHN_FOREACH(c, d, channels.pcm) {
140 CHN_LOCK(c);
141 CHN_SETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_VOL_0DB, db);
142 if (reset != 0)
143 chn_vpc_reset(c, SND_VOL_C_PCM, 1);
144 CHN_UNLOCK(c);
145 }
146 PCM_RELEASE(d);
147 PCM_UNLOCK(d);
148 }
149 }
150
151 static int
sysctl_hw_snd_vpc_0db(SYSCTL_HANDLER_ARGS)152 sysctl_hw_snd_vpc_0db(SYSCTL_HANDLER_ARGS)
153 {
154 int err, val;
155
156 val = chn_vol_0db_pcm;
157 err = sysctl_handle_int(oidp, &val, 0, req);
158 if (err != 0 || req->newptr == NULL)
159 return (err);
160 if (val < SND_VOL_0DB_MIN || val > SND_VOL_0DB_MAX)
161 return (EINVAL);
162
163 chn_vol_0db_pcm = val;
164 chn_vpc_proc(0, val);
165
166 return (0);
167 }
168 SYSCTL_PROC(_hw_snd, OID_AUTO, vpc_0db,
169 CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, 0, sizeof(int),
170 sysctl_hw_snd_vpc_0db, "I",
171 "0db relative level");
172
173 static int
sysctl_hw_snd_vpc_reset(SYSCTL_HANDLER_ARGS)174 sysctl_hw_snd_vpc_reset(SYSCTL_HANDLER_ARGS)
175 {
176 int err, val;
177
178 val = 0;
179 err = sysctl_handle_int(oidp, &val, 0, req);
180 if (err != 0 || req->newptr == NULL || val == 0)
181 return (err);
182
183 chn_vol_0db_pcm = SND_VOL_0DB_PCM;
184 chn_vpc_proc(1, SND_VOL_0DB_PCM);
185
186 return (0);
187 }
188 SYSCTL_PROC(_hw_snd, OID_AUTO, vpc_reset,
189 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, sizeof(int),
190 sysctl_hw_snd_vpc_reset, "I",
191 "reset volume on all channels");
192
193 static int chn_usefrags = 0;
194 static int chn_syncdelay = -1;
195
196 SYSCTL_INT(_hw_snd, OID_AUTO, usefrags, CTLFLAG_RWTUN,
197 &chn_usefrags, 0, "prefer setfragments() over setblocksize()");
198 SYSCTL_INT(_hw_snd, OID_AUTO, syncdelay, CTLFLAG_RWTUN,
199 &chn_syncdelay, 0,
200 "append (0-1000) millisecond trailing buffer delay on each sync");
201
202 /**
203 * @brief Channel sync group lock
204 *
205 * Clients should acquire this lock @b without holding any channel locks
206 * before touching syncgroups or the main syncgroup list.
207 */
208 struct mtx snd_pcm_syncgroups_mtx;
209 MTX_SYSINIT(pcm_syncgroup, &snd_pcm_syncgroups_mtx, "PCM channel sync group lock", MTX_DEF);
210 /**
211 * @brief syncgroups' master list
212 *
213 * Each time a channel syncgroup is created, it's added to this list. This
214 * list should only be accessed with @sa snd_pcm_syncgroups_mtx held.
215 *
216 * See SNDCTL_DSP_SYNCGROUP for more information.
217 */
218 struct pcm_synclist snd_pcm_syncgroups = SLIST_HEAD_INITIALIZER(snd_pcm_syncgroups);
219
220 static void
chn_lockinit(struct pcm_channel * c,int dir)221 chn_lockinit(struct pcm_channel *c, int dir)
222 {
223 switch (dir) {
224 case PCMDIR_PLAY:
225 c->lock = snd_mtxcreate(c->name, "pcm play channel");
226 cv_init(&c->intr_cv, "pcmwr");
227 break;
228 case PCMDIR_PLAY_VIRTUAL:
229 c->lock = snd_mtxcreate(c->name, "pcm virtual play channel");
230 cv_init(&c->intr_cv, "pcmwrv");
231 break;
232 case PCMDIR_REC:
233 c->lock = snd_mtxcreate(c->name, "pcm record channel");
234 cv_init(&c->intr_cv, "pcmrd");
235 break;
236 case PCMDIR_REC_VIRTUAL:
237 c->lock = snd_mtxcreate(c->name, "pcm virtual record channel");
238 cv_init(&c->intr_cv, "pcmrdv");
239 break;
240 default:
241 panic("%s(): Invalid direction=%d", __func__, dir);
242 break;
243 }
244
245 cv_init(&c->cv, "pcmchn");
246 }
247
248 static void
chn_lockdestroy(struct pcm_channel * c)249 chn_lockdestroy(struct pcm_channel *c)
250 {
251 CHN_LOCKASSERT(c);
252
253 CHN_BROADCAST(&c->cv);
254 CHN_BROADCAST(&c->intr_cv);
255
256 cv_destroy(&c->cv);
257 cv_destroy(&c->intr_cv);
258
259 snd_mtxfree(c->lock);
260 }
261
262 /**
263 * @brief Determine channel is ready for I/O
264 *
265 * @retval 1 = ready for I/O
266 * @retval 0 = not ready for I/O
267 */
268 static int
chn_polltrigger(struct pcm_channel * c)269 chn_polltrigger(struct pcm_channel *c)
270 {
271 struct snd_dbuf *bs = c->bufsoft;
272 u_int delta;
273
274 CHN_LOCKASSERT(c);
275
276 if (c->flags & CHN_F_MMAP) {
277 if (sndbuf_getprevtotal(bs) < c->lw)
278 delta = c->lw;
279 else
280 delta = sndbuf_gettotal(bs) - sndbuf_getprevtotal(bs);
281 } else {
282 if (c->direction == PCMDIR_PLAY)
283 delta = sndbuf_getfree(bs);
284 else
285 delta = sndbuf_getready(bs);
286 }
287
288 return ((delta < c->lw) ? 0 : 1);
289 }
290
291 static void
chn_pollreset(struct pcm_channel * c)292 chn_pollreset(struct pcm_channel *c)
293 {
294
295 CHN_LOCKASSERT(c);
296 sndbuf_updateprevtotal(c->bufsoft);
297 }
298
299 static void
chn_wakeup(struct pcm_channel * c)300 chn_wakeup(struct pcm_channel *c)
301 {
302 struct snd_dbuf *bs;
303 struct pcm_channel *ch;
304
305 CHN_LOCKASSERT(c);
306
307 bs = c->bufsoft;
308
309 if (CHN_EMPTY(c, children.busy)) {
310 if (SEL_WAITING(sndbuf_getsel(bs)) && chn_polltrigger(c))
311 selwakeuppri(sndbuf_getsel(bs), PRIBIO);
312 if (c->flags & CHN_F_SLEEPING) {
313 /*
314 * Ok, I can just panic it right here since it is
315 * quite obvious that we never allow multiple waiters
316 * from userland. I'm too generous...
317 */
318 CHN_BROADCAST(&c->intr_cv);
319 }
320 } else {
321 CHN_FOREACH(ch, c, children.busy) {
322 CHN_LOCK(ch);
323 chn_wakeup(ch);
324 CHN_UNLOCK(ch);
325 }
326 }
327 }
328
329 static int
chn_sleep(struct pcm_channel * c,int timeout)330 chn_sleep(struct pcm_channel *c, int timeout)
331 {
332 int ret;
333
334 CHN_LOCKASSERT(c);
335 KASSERT((c->flags & CHN_F_SLEEPING) == 0,
336 ("%s(): entered with CHN_F_SLEEPING", __func__));
337
338 if (c->flags & CHN_F_DEAD)
339 return (EINVAL);
340
341 c->flags |= CHN_F_SLEEPING;
342 ret = cv_timedwait_sig(&c->intr_cv, c->lock, timeout);
343 c->flags &= ~CHN_F_SLEEPING;
344
345 return ((c->flags & CHN_F_DEAD) ? EINVAL : ret);
346 }
347
348 /*
349 * chn_dmaupdate() tracks the status of a dma transfer,
350 * updating pointers.
351 */
352
353 static unsigned int
chn_dmaupdate(struct pcm_channel * c)354 chn_dmaupdate(struct pcm_channel *c)
355 {
356 struct snd_dbuf *b = c->bufhard;
357 unsigned int delta, old, hwptr, amt;
358
359 KASSERT(sndbuf_getsize(b) > 0, ("bufsize == 0"));
360 CHN_LOCKASSERT(c);
361
362 old = sndbuf_gethwptr(b);
363 hwptr = chn_getptr(c);
364 delta = (sndbuf_getsize(b) + hwptr - old) % sndbuf_getsize(b);
365 sndbuf_sethwptr(b, hwptr);
366
367 if (c->direction == PCMDIR_PLAY) {
368 amt = min(delta, sndbuf_getready(b));
369 amt -= amt % sndbuf_getalign(b);
370 if (amt > 0)
371 sndbuf_dispose(b, NULL, amt);
372 } else {
373 amt = min(delta, sndbuf_getfree(b));
374 amt -= amt % sndbuf_getalign(b);
375 if (amt > 0)
376 sndbuf_acquire(b, NULL, amt);
377 }
378 if (snd_verbose > 3 && CHN_STARTED(c) && delta == 0) {
379 device_printf(c->dev, "WARNING: %s DMA completion "
380 "too fast/slow ! hwptr=%u, old=%u "
381 "delta=%u amt=%u ready=%u free=%u\n",
382 CHN_DIRSTR(c), hwptr, old, delta, amt,
383 sndbuf_getready(b), sndbuf_getfree(b));
384 }
385
386 return delta;
387 }
388
389 static void
chn_wrfeed(struct pcm_channel * c)390 chn_wrfeed(struct pcm_channel *c)
391 {
392 struct snd_dbuf *b = c->bufhard;
393 struct snd_dbuf *bs = c->bufsoft;
394 unsigned int amt, want, wasfree;
395
396 CHN_LOCKASSERT(c);
397
398 if ((c->flags & CHN_F_MMAP) && !(c->flags & CHN_F_CLOSING))
399 sndbuf_acquire(bs, NULL, sndbuf_getfree(bs));
400
401 wasfree = sndbuf_getfree(b);
402 want = min(sndbuf_getsize(b),
403 imax(0, sndbuf_xbytes(sndbuf_getsize(bs), bs, b) -
404 sndbuf_getready(b)));
405 amt = min(wasfree, want);
406 if (amt > 0)
407 sndbuf_feed(bs, b, c, c->feeder, amt);
408
409 /*
410 * Possible xruns. There should be no empty space left in buffer.
411 */
412 if (sndbuf_getready(b) < want)
413 c->xruns++;
414
415 if (sndbuf_getfree(b) < wasfree)
416 chn_wakeup(c);
417 }
418
419 #if 0
420 static void
421 chn_wrupdate(struct pcm_channel *c)
422 {
423
424 CHN_LOCKASSERT(c);
425 KASSERT(c->direction == PCMDIR_PLAY, ("%s(): bad channel", __func__));
426
427 if ((c->flags & (CHN_F_MMAP | CHN_F_VIRTUAL)) || CHN_STOPPED(c))
428 return;
429 chn_dmaupdate(c);
430 chn_wrfeed(c);
431 /* tell the driver we've updated the primary buffer */
432 chn_trigger(c, PCMTRIG_EMLDMAWR);
433 }
434 #endif
435
436 static void
chn_wrintr(struct pcm_channel * c)437 chn_wrintr(struct pcm_channel *c)
438 {
439
440 CHN_LOCKASSERT(c);
441 /* update pointers in primary buffer */
442 chn_dmaupdate(c);
443 /* ...and feed from secondary to primary */
444 chn_wrfeed(c);
445 /* tell the driver we've updated the primary buffer */
446 chn_trigger(c, PCMTRIG_EMLDMAWR);
447 }
448
449 /*
450 * user write routine - uiomove data into secondary buffer, trigger if necessary
451 * if blocking, sleep, rinse and repeat.
452 *
453 * called externally, so must handle locking
454 */
455
456 int
chn_write(struct pcm_channel * c,struct uio * buf)457 chn_write(struct pcm_channel *c, struct uio *buf)
458 {
459 struct snd_dbuf *bs = c->bufsoft;
460 void *off;
461 int ret, timeout, sz, t, p;
462
463 CHN_LOCKASSERT(c);
464
465 ret = 0;
466 timeout = chn_timeout * hz;
467
468 while (ret == 0 && buf->uio_resid > 0) {
469 sz = min(buf->uio_resid, sndbuf_getfree(bs));
470 if (sz > 0) {
471 /*
472 * The following assumes that the free space in
473 * the buffer can never be less around the
474 * unlock-uiomove-lock sequence.
475 */
476 while (ret == 0 && sz > 0) {
477 p = sndbuf_getfreeptr(bs);
478 t = min(sz, sndbuf_getsize(bs) - p);
479 off = sndbuf_getbufofs(bs, p);
480 CHN_UNLOCK(c);
481 ret = uiomove(off, t, buf);
482 CHN_LOCK(c);
483 sz -= t;
484 sndbuf_acquire(bs, NULL, t);
485 }
486 ret = 0;
487 if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) {
488 ret = chn_start(c, 0);
489 if (ret != 0)
490 c->flags |= CHN_F_DEAD;
491 }
492 } else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER)) {
493 /**
494 * @todo Evaluate whether EAGAIN is truly desirable.
495 * 4Front drivers behave like this, but I'm
496 * not sure if it at all violates the "write
497 * should be allowed to block" model.
498 *
499 * The idea is that, while set with CHN_F_NOTRIGGER,
500 * a channel isn't playing, *but* without this we
501 * end up with "interrupt timeout / channel dead".
502 */
503 ret = EAGAIN;
504 } else {
505 ret = chn_sleep(c, timeout);
506 if (ret == EAGAIN) {
507 ret = EINVAL;
508 c->flags |= CHN_F_DEAD;
509 device_printf(c->dev, "%s(): %s: "
510 "play interrupt timeout, channel dead\n",
511 __func__, c->name);
512 } else if (ret == ERESTART || ret == EINTR)
513 c->flags |= CHN_F_ABORTING;
514 }
515 }
516
517 return (ret);
518 }
519
520 /*
521 * Feed new data from the read buffer. Can be called in the bottom half.
522 */
523 static void
chn_rdfeed(struct pcm_channel * c)524 chn_rdfeed(struct pcm_channel *c)
525 {
526 struct snd_dbuf *b = c->bufhard;
527 struct snd_dbuf *bs = c->bufsoft;
528 unsigned int amt;
529
530 CHN_LOCKASSERT(c);
531
532 if (c->flags & CHN_F_MMAP)
533 sndbuf_dispose(bs, NULL, sndbuf_getready(bs));
534
535 amt = sndbuf_getfree(bs);
536 if (amt > 0)
537 sndbuf_feed(b, bs, c, c->feeder, amt);
538
539 amt = sndbuf_getready(b);
540 if (amt > 0) {
541 c->xruns++;
542 sndbuf_dispose(b, NULL, amt);
543 }
544
545 if (sndbuf_getready(bs) > 0)
546 chn_wakeup(c);
547 }
548
549 #if 0
550 static void
551 chn_rdupdate(struct pcm_channel *c)
552 {
553
554 CHN_LOCKASSERT(c);
555 KASSERT(c->direction == PCMDIR_REC, ("chn_rdupdate on bad channel"));
556
557 if ((c->flags & (CHN_F_MMAP | CHN_F_VIRTUAL)) || CHN_STOPPED(c))
558 return;
559 chn_trigger(c, PCMTRIG_EMLDMARD);
560 chn_dmaupdate(c);
561 chn_rdfeed(c);
562 }
563 #endif
564
565 /* read interrupt routine. Must be called with interrupts blocked. */
566 static void
chn_rdintr(struct pcm_channel * c)567 chn_rdintr(struct pcm_channel *c)
568 {
569
570 CHN_LOCKASSERT(c);
571 /* tell the driver to update the primary buffer if non-dma */
572 chn_trigger(c, PCMTRIG_EMLDMARD);
573 /* update pointers in primary buffer */
574 chn_dmaupdate(c);
575 /* ...and feed from primary to secondary */
576 chn_rdfeed(c);
577 }
578
579 /*
580 * user read routine - trigger if necessary, uiomove data from secondary buffer
581 * if blocking, sleep, rinse and repeat.
582 *
583 * called externally, so must handle locking
584 */
585
586 int
chn_read(struct pcm_channel * c,struct uio * buf)587 chn_read(struct pcm_channel *c, struct uio *buf)
588 {
589 struct snd_dbuf *bs = c->bufsoft;
590 void *off;
591 int ret, timeout, sz, t, p;
592
593 CHN_LOCKASSERT(c);
594
595 if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) {
596 ret = chn_start(c, 0);
597 if (ret != 0) {
598 c->flags |= CHN_F_DEAD;
599 return (ret);
600 }
601 }
602
603 ret = 0;
604 timeout = chn_timeout * hz;
605
606 while (ret == 0 && buf->uio_resid > 0) {
607 sz = min(buf->uio_resid, sndbuf_getready(bs));
608 if (sz > 0) {
609 /*
610 * The following assumes that the free space in
611 * the buffer can never be less around the
612 * unlock-uiomove-lock sequence.
613 */
614 while (ret == 0 && sz > 0) {
615 p = sndbuf_getreadyptr(bs);
616 t = min(sz, sndbuf_getsize(bs) - p);
617 off = sndbuf_getbufofs(bs, p);
618 CHN_UNLOCK(c);
619 ret = uiomove(off, t, buf);
620 CHN_LOCK(c);
621 sz -= t;
622 sndbuf_dispose(bs, NULL, t);
623 }
624 ret = 0;
625 } else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER))
626 ret = EAGAIN;
627 else {
628 ret = chn_sleep(c, timeout);
629 if (ret == EAGAIN) {
630 ret = EINVAL;
631 c->flags |= CHN_F_DEAD;
632 device_printf(c->dev, "%s(): %s: "
633 "record interrupt timeout, channel dead\n",
634 __func__, c->name);
635 } else if (ret == ERESTART || ret == EINTR)
636 c->flags |= CHN_F_ABORTING;
637 }
638 }
639
640 return (ret);
641 }
642
643 void
chn_intr_locked(struct pcm_channel * c)644 chn_intr_locked(struct pcm_channel *c)
645 {
646
647 CHN_LOCKASSERT(c);
648
649 c->interrupts++;
650
651 if (c->direction == PCMDIR_PLAY)
652 chn_wrintr(c);
653 else
654 chn_rdintr(c);
655 }
656
657 void
chn_intr(struct pcm_channel * c)658 chn_intr(struct pcm_channel *c)
659 {
660
661 if (CHN_LOCKOWNED(c)) {
662 chn_intr_locked(c);
663 return;
664 }
665
666 CHN_LOCK(c);
667 chn_intr_locked(c);
668 CHN_UNLOCK(c);
669 }
670
671 u_int32_t
chn_start(struct pcm_channel * c,int force)672 chn_start(struct pcm_channel *c, int force)
673 {
674 u_int32_t i, j;
675 struct snd_dbuf *b = c->bufhard;
676 struct snd_dbuf *bs = c->bufsoft;
677 int err;
678
679 CHN_LOCKASSERT(c);
680 /* if we're running, or if we're prevented from triggering, bail */
681 if (CHN_STARTED(c) || ((c->flags & CHN_F_NOTRIGGER) && !force))
682 return (EINVAL);
683
684 err = 0;
685
686 if (force) {
687 i = 1;
688 j = 0;
689 } else {
690 if (c->direction == PCMDIR_REC) {
691 i = sndbuf_getfree(bs);
692 j = (i > 0) ? 1 : sndbuf_getready(b);
693 } else {
694 if (sndbuf_getfree(bs) == 0) {
695 i = 1;
696 j = 0;
697 } else {
698 struct snd_dbuf *pb;
699
700 pb = CHN_BUF_PARENT(c, b);
701 i = sndbuf_xbytes(sndbuf_getready(bs), bs, pb);
702 j = sndbuf_getalign(pb);
703 }
704 }
705 if (snd_verbose > 3 && CHN_EMPTY(c, children))
706 device_printf(c->dev, "%s(): %s (%s) threshold "
707 "i=%d j=%d\n", __func__, CHN_DIRSTR(c),
708 (c->flags & CHN_F_VIRTUAL) ? "virtual" :
709 "hardware", i, j);
710 }
711
712 if (i >= j) {
713 c->flags |= CHN_F_TRIGGERED;
714 sndbuf_setrun(b, 1);
715 if (c->flags & CHN_F_CLOSING)
716 c->feedcount = 2;
717 else {
718 c->feedcount = 0;
719 c->interrupts = 0;
720 c->xruns = 0;
721 }
722 if (c->parentchannel == NULL) {
723 if (c->direction == PCMDIR_PLAY)
724 sndbuf_fillsilence_rl(b,
725 sndbuf_xbytes(sndbuf_getsize(bs), bs, b));
726 if (snd_verbose > 3)
727 device_printf(c->dev,
728 "%s(): %s starting! (%s/%s) "
729 "(ready=%d force=%d i=%d j=%d "
730 "intrtimeout=%u latency=%dms)\n",
731 __func__,
732 (c->flags & CHN_F_HAS_VCHAN) ?
733 "VCHAN PARENT" : "HW", CHN_DIRSTR(c),
734 (c->flags & CHN_F_CLOSING) ? "closing" :
735 "running",
736 sndbuf_getready(b),
737 force, i, j, c->timeout,
738 (sndbuf_getsize(b) * 1000) /
739 (sndbuf_getalign(b) * sndbuf_getspd(b)));
740 }
741 err = chn_trigger(c, PCMTRIG_START);
742 }
743
744 return (err);
745 }
746
747 void
chn_resetbuf(struct pcm_channel * c)748 chn_resetbuf(struct pcm_channel *c)
749 {
750 struct snd_dbuf *b = c->bufhard;
751 struct snd_dbuf *bs = c->bufsoft;
752
753 c->blocks = 0;
754 sndbuf_reset(b);
755 sndbuf_reset(bs);
756 }
757
758 /*
759 * chn_sync waits until the space in the given channel goes above
760 * a threshold. The threshold is checked against fl or rl respectively.
761 * Assume that the condition can become true, do not check here...
762 */
763 int
chn_sync(struct pcm_channel * c,int threshold)764 chn_sync(struct pcm_channel *c, int threshold)
765 {
766 struct snd_dbuf *b, *bs;
767 int ret, count, hcount, minflush, resid, residp, syncdelay, blksz;
768 u_int32_t cflag;
769
770 CHN_LOCKASSERT(c);
771
772 if (c->direction != PCMDIR_PLAY)
773 return (EINVAL);
774
775 bs = c->bufsoft;
776
777 if ((c->flags & (CHN_F_DEAD | CHN_F_ABORTING)) ||
778 (threshold < 1 && sndbuf_getready(bs) < 1))
779 return (0);
780
781 /* if we haven't yet started and nothing is buffered, else start*/
782 if (CHN_STOPPED(c)) {
783 if (threshold > 0 || sndbuf_getready(bs) > 0) {
784 ret = chn_start(c, 1);
785 if (ret != 0)
786 return (ret);
787 } else
788 return (0);
789 }
790
791 b = CHN_BUF_PARENT(c, c->bufhard);
792
793 minflush = threshold + sndbuf_xbytes(sndbuf_getready(b), b, bs);
794
795 syncdelay = chn_syncdelay;
796
797 if (syncdelay < 0 && (threshold > 0 || sndbuf_getready(bs) > 0))
798 minflush += sndbuf_xbytes(sndbuf_getsize(b), b, bs);
799
800 /*
801 * Append (0-1000) millisecond trailing buffer (if needed)
802 * for slower / high latency hardwares (notably USB audio)
803 * to avoid audible truncation.
804 */
805 if (syncdelay > 0)
806 minflush += (sndbuf_getalign(bs) * sndbuf_getspd(bs) *
807 ((syncdelay > 1000) ? 1000 : syncdelay)) / 1000;
808
809 minflush -= minflush % sndbuf_getalign(bs);
810
811 if (minflush > 0) {
812 threshold = min(minflush, sndbuf_getfree(bs));
813 sndbuf_clear(bs, threshold);
814 sndbuf_acquire(bs, NULL, threshold);
815 minflush -= threshold;
816 }
817
818 resid = sndbuf_getready(bs);
819 residp = resid;
820 blksz = sndbuf_getblksz(b);
821 if (blksz < 1) {
822 device_printf(c->dev,
823 "%s(): WARNING: blksz < 1 ! maxsize=%d [%d/%d/%d]\n",
824 __func__, sndbuf_getmaxsize(b), sndbuf_getsize(b),
825 sndbuf_getblksz(b), sndbuf_getblkcnt(b));
826 if (sndbuf_getblkcnt(b) > 0)
827 blksz = sndbuf_getsize(b) / sndbuf_getblkcnt(b);
828 if (blksz < 1)
829 blksz = 1;
830 }
831 count = sndbuf_xbytes(minflush + resid, bs, b) / blksz;
832 hcount = count;
833 ret = 0;
834
835 if (snd_verbose > 3)
836 device_printf(c->dev, "%s(): [begin] timeout=%d count=%d "
837 "minflush=%d resid=%d\n", __func__, c->timeout, count,
838 minflush, resid);
839
840 cflag = c->flags & CHN_F_CLOSING;
841 c->flags |= CHN_F_CLOSING;
842 while (count > 0 && (resid > 0 || minflush > 0)) {
843 ret = chn_sleep(c, c->timeout);
844 if (ret == ERESTART || ret == EINTR) {
845 c->flags |= CHN_F_ABORTING;
846 break;
847 } else if (ret == 0 || ret == EAGAIN) {
848 resid = sndbuf_getready(bs);
849 if (resid == residp) {
850 --count;
851 if (snd_verbose > 3)
852 device_printf(c->dev,
853 "%s(): [stalled] timeout=%d "
854 "count=%d hcount=%d "
855 "resid=%d minflush=%d\n",
856 __func__, c->timeout, count,
857 hcount, resid, minflush);
858 } else if (resid < residp && count < hcount) {
859 ++count;
860 if (snd_verbose > 3)
861 device_printf(c->dev,
862 "%s((): [resume] timeout=%d "
863 "count=%d hcount=%d "
864 "resid=%d minflush=%d\n",
865 __func__, c->timeout, count,
866 hcount, resid, minflush);
867 }
868 if (minflush > 0 && sndbuf_getfree(bs) > 0) {
869 threshold = min(minflush,
870 sndbuf_getfree(bs));
871 sndbuf_clear(bs, threshold);
872 sndbuf_acquire(bs, NULL, threshold);
873 resid = sndbuf_getready(bs);
874 minflush -= threshold;
875 }
876 residp = resid;
877 } else
878 break;
879 }
880 c->flags &= ~CHN_F_CLOSING;
881 c->flags |= cflag;
882
883 if (snd_verbose > 3)
884 device_printf(c->dev,
885 "%s(): timeout=%d count=%d hcount=%d resid=%d residp=%d "
886 "minflush=%d ret=%d\n",
887 __func__, c->timeout, count, hcount, resid, residp,
888 minflush, ret);
889
890 return (0);
891 }
892
893 /* called externally, handle locking */
894 int
chn_poll(struct pcm_channel * c,int ev,struct thread * td)895 chn_poll(struct pcm_channel *c, int ev, struct thread *td)
896 {
897 struct snd_dbuf *bs = c->bufsoft;
898 int ret;
899
900 CHN_LOCKASSERT(c);
901
902 if (!(c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED))) {
903 ret = chn_start(c, 1);
904 if (ret != 0)
905 return (0);
906 }
907
908 ret = 0;
909 if (chn_polltrigger(c)) {
910 chn_pollreset(c);
911 ret = ev;
912 } else
913 selrecord(td, sndbuf_getsel(bs));
914
915 return (ret);
916 }
917
918 /*
919 * chn_abort terminates a running dma transfer. it may sleep up to 200ms.
920 * it returns the number of bytes that have not been transferred.
921 *
922 * called from: dsp_close, dsp_ioctl, with channel locked
923 */
924 int
chn_abort(struct pcm_channel * c)925 chn_abort(struct pcm_channel *c)
926 {
927 int missing = 0;
928 struct snd_dbuf *b = c->bufhard;
929 struct snd_dbuf *bs = c->bufsoft;
930
931 CHN_LOCKASSERT(c);
932 if (CHN_STOPPED(c))
933 return 0;
934 c->flags |= CHN_F_ABORTING;
935
936 c->flags &= ~CHN_F_TRIGGERED;
937 /* kill the channel */
938 chn_trigger(c, PCMTRIG_ABORT);
939 sndbuf_setrun(b, 0);
940 if (!(c->flags & CHN_F_VIRTUAL))
941 chn_dmaupdate(c);
942 missing = sndbuf_getready(bs);
943
944 c->flags &= ~CHN_F_ABORTING;
945 return missing;
946 }
947
948 /*
949 * this routine tries to flush the dma transfer. It is called
950 * on a close of a playback channel.
951 * first, if there is data in the buffer, but the dma has not yet
952 * begun, we need to start it.
953 * next, we wait for the play buffer to drain
954 * finally, we stop the dma.
955 *
956 * called from: dsp_close, not valid for record channels.
957 */
958
959 int
chn_flush(struct pcm_channel * c)960 chn_flush(struct pcm_channel *c)
961 {
962 struct snd_dbuf *b = c->bufhard;
963
964 CHN_LOCKASSERT(c);
965 KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel"));
966 DEB(printf("chn_flush: c->flags 0x%08x\n", c->flags));
967
968 c->flags |= CHN_F_CLOSING;
969 chn_sync(c, 0);
970 c->flags &= ~CHN_F_TRIGGERED;
971 /* kill the channel */
972 chn_trigger(c, PCMTRIG_ABORT);
973 sndbuf_setrun(b, 0);
974
975 c->flags &= ~CHN_F_CLOSING;
976 return 0;
977 }
978
979 int
snd_fmtvalid(uint32_t fmt,uint32_t * fmtlist)980 snd_fmtvalid(uint32_t fmt, uint32_t *fmtlist)
981 {
982 int i;
983
984 for (i = 0; fmtlist[i] != 0; i++) {
985 if (fmt == fmtlist[i] ||
986 ((fmt & AFMT_PASSTHROUGH) &&
987 (AFMT_ENCODING(fmt) & fmtlist[i])))
988 return (1);
989 }
990
991 return (0);
992 }
993
994 static const struct {
995 char *name, *alias1, *alias2;
996 uint32_t afmt;
997 } afmt_tab[] = {
998 { "alaw", NULL, NULL, AFMT_A_LAW },
999 { "mulaw", NULL, NULL, AFMT_MU_LAW },
1000 { "u8", "8", NULL, AFMT_U8 },
1001 { "s8", NULL, NULL, AFMT_S8 },
1002 #if BYTE_ORDER == LITTLE_ENDIAN
1003 { "s16le", "s16", "16", AFMT_S16_LE },
1004 { "s16be", NULL, NULL, AFMT_S16_BE },
1005 #else
1006 { "s16le", NULL, NULL, AFMT_S16_LE },
1007 { "s16be", "s16", "16", AFMT_S16_BE },
1008 #endif
1009 { "u16le", NULL, NULL, AFMT_U16_LE },
1010 { "u16be", NULL, NULL, AFMT_U16_BE },
1011 { "s24le", NULL, NULL, AFMT_S24_LE },
1012 { "s24be", NULL, NULL, AFMT_S24_BE },
1013 { "u24le", NULL, NULL, AFMT_U24_LE },
1014 { "u24be", NULL, NULL, AFMT_U24_BE },
1015 #if BYTE_ORDER == LITTLE_ENDIAN
1016 { "s32le", "s32", "32", AFMT_S32_LE },
1017 { "s32be", NULL, NULL, AFMT_S32_BE },
1018 #else
1019 { "s32le", NULL, NULL, AFMT_S32_LE },
1020 { "s32be", "s32", "32", AFMT_S32_BE },
1021 #endif
1022 { "u32le", NULL, NULL, AFMT_U32_LE },
1023 { "u32be", NULL, NULL, AFMT_U32_BE },
1024 { "ac3", NULL, NULL, AFMT_AC3 },
1025 { NULL, NULL, NULL, 0 }
1026 };
1027
1028 uint32_t
snd_str2afmt(const char * req)1029 snd_str2afmt(const char *req)
1030 {
1031 int ext;
1032 int ch;
1033 int i;
1034 char b1[8];
1035 char b2[8];
1036
1037 memset(b1, 0, sizeof(b1));
1038 memset(b2, 0, sizeof(b2));
1039
1040 i = sscanf(req, "%5[^:]:%6s", b1, b2);
1041
1042 if (i == 1) {
1043 if (strlen(req) != strlen(b1))
1044 return (0);
1045 strlcpy(b2, "2.0", sizeof(b2));
1046 } else if (i == 2) {
1047 if (strlen(req) != (strlen(b1) + 1 + strlen(b2)))
1048 return (0);
1049 } else
1050 return (0);
1051
1052 i = sscanf(b2, "%d.%d", &ch, &ext);
1053
1054 if (i == 0) {
1055 if (strcasecmp(b2, "mono") == 0) {
1056 ch = 1;
1057 ext = 0;
1058 } else if (strcasecmp(b2, "stereo") == 0) {
1059 ch = 2;
1060 ext = 0;
1061 } else if (strcasecmp(b2, "quad") == 0) {
1062 ch = 4;
1063 ext = 0;
1064 } else
1065 return (0);
1066 } else if (i == 1) {
1067 if (ch < 1 || ch > AFMT_CHANNEL_MAX)
1068 return (0);
1069 ext = 0;
1070 } else if (i == 2) {
1071 if (ext < 0 || ext > AFMT_EXTCHANNEL_MAX)
1072 return (0);
1073 if (ch < 1 || (ch + ext) > AFMT_CHANNEL_MAX)
1074 return (0);
1075 } else
1076 return (0);
1077
1078 for (i = 0; afmt_tab[i].name != NULL; i++) {
1079 if (strcasecmp(afmt_tab[i].name, b1) != 0) {
1080 if (afmt_tab[i].alias1 == NULL)
1081 continue;
1082 if (strcasecmp(afmt_tab[i].alias1, b1) != 0) {
1083 if (afmt_tab[i].alias2 == NULL)
1084 continue;
1085 if (strcasecmp(afmt_tab[i].alias2, b1) != 0)
1086 continue;
1087 }
1088 }
1089 /* found a match */
1090 return (SND_FORMAT(afmt_tab[i].afmt, ch + ext, ext));
1091 }
1092 /* not a valid format */
1093 return (0);
1094 }
1095
1096 uint32_t
snd_afmt2str(uint32_t afmt,char * buf,size_t len)1097 snd_afmt2str(uint32_t afmt, char *buf, size_t len)
1098 {
1099 uint32_t enc;
1100 uint32_t ext;
1101 uint32_t ch;
1102 int i;
1103
1104 if (buf == NULL || len < AFMTSTR_LEN)
1105 return (0);
1106
1107 memset(buf, 0, len);
1108
1109 enc = AFMT_ENCODING(afmt);
1110 ch = AFMT_CHANNEL(afmt);
1111 ext = AFMT_EXTCHANNEL(afmt);
1112 /* check there is at least one channel */
1113 if (ch <= ext)
1114 return (0);
1115 for (i = 0; afmt_tab[i].name != NULL; i++) {
1116 if (enc != afmt_tab[i].afmt)
1117 continue;
1118 /* found a match */
1119 snprintf(buf, len, "%s:%d.%d",
1120 afmt_tab[i].name, ch - ext, ext);
1121 return (SND_FORMAT(enc, ch, ext));
1122 }
1123 return (0);
1124 }
1125
1126 int
chn_reset(struct pcm_channel * c,uint32_t fmt,uint32_t spd)1127 chn_reset(struct pcm_channel *c, uint32_t fmt, uint32_t spd)
1128 {
1129 int r;
1130
1131 CHN_LOCKASSERT(c);
1132 c->feedcount = 0;
1133 c->flags &= CHN_F_RESET;
1134 c->interrupts = 0;
1135 c->timeout = 1;
1136 c->xruns = 0;
1137
1138 c->flags |= (pcm_getflags(c->dev) & SD_F_BITPERFECT) ?
1139 CHN_F_BITPERFECT : 0;
1140
1141 r = CHANNEL_RESET(c->methods, c->devinfo);
1142 if (r == 0 && fmt != 0 && spd != 0) {
1143 r = chn_setparam(c, fmt, spd);
1144 fmt = 0;
1145 spd = 0;
1146 }
1147 if (r == 0 && fmt != 0)
1148 r = chn_setformat(c, fmt);
1149 if (r == 0 && spd != 0)
1150 r = chn_setspeed(c, spd);
1151 if (r == 0)
1152 r = chn_setlatency(c, chn_latency);
1153 if (r == 0) {
1154 chn_resetbuf(c);
1155 r = CHANNEL_RESETDONE(c->methods, c->devinfo);
1156 }
1157 return r;
1158 }
1159
1160 int
chn_init(struct pcm_channel * c,void * devinfo,int dir,int direction)1161 chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction)
1162 {
1163 struct feeder_class *fc;
1164 struct snd_dbuf *b, *bs;
1165 int i, ret;
1166
1167 chn_lockinit(c, dir);
1168
1169 b = NULL;
1170 bs = NULL;
1171 CHN_INIT(c, children);
1172 CHN_INIT(c, children.busy);
1173 c->devinfo = NULL;
1174 c->feeder = NULL;
1175 c->latency = -1;
1176 c->timeout = 1;
1177
1178 ret = ENOMEM;
1179 b = sndbuf_create(c->dev, c->name, "primary", c);
1180 if (b == NULL)
1181 goto out;
1182 bs = sndbuf_create(c->dev, c->name, "secondary", c);
1183 if (bs == NULL)
1184 goto out;
1185
1186 CHN_LOCK(c);
1187
1188 ret = EINVAL;
1189 fc = feeder_getclass(NULL);
1190 if (fc == NULL)
1191 goto out;
1192 if (chn_addfeeder(c, fc, NULL))
1193 goto out;
1194
1195 /*
1196 * XXX - sndbuf_setup() & sndbuf_resize() expect to be called
1197 * with the channel unlocked because they are also called
1198 * from driver methods that don't know about locking
1199 */
1200 CHN_UNLOCK(c);
1201 sndbuf_setup(bs, NULL, 0);
1202 CHN_LOCK(c);
1203 c->bufhard = b;
1204 c->bufsoft = bs;
1205 c->flags = 0;
1206 c->feederflags = 0;
1207 c->sm = NULL;
1208 c->format = SND_FORMAT(AFMT_U8, 1, 0);
1209 c->speed = DSP_DEFAULT_SPEED;
1210
1211 c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0);
1212 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
1213
1214 for (i = 0; i < SND_CHN_T_MAX; i++) {
1215 c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER;
1216 }
1217
1218 c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER;
1219 c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm;
1220
1221 memset(c->muted, 0, sizeof(c->muted));
1222
1223 chn_vpc_reset(c, SND_VOL_C_PCM, 1);
1224
1225 ret = ENODEV;
1226 CHN_UNLOCK(c); /* XXX - Unlock for CHANNEL_INIT() malloc() call */
1227 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction);
1228 CHN_LOCK(c);
1229 if (c->devinfo == NULL)
1230 goto out;
1231
1232 ret = ENOMEM;
1233 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0))
1234 goto out;
1235
1236 ret = 0;
1237 c->direction = direction;
1238
1239 sndbuf_setfmt(b, c->format);
1240 sndbuf_setspd(b, c->speed);
1241 sndbuf_setfmt(bs, c->format);
1242 sndbuf_setspd(bs, c->speed);
1243
1244 /**
1245 * @todo Should this be moved somewhere else? The primary buffer
1246 * is allocated by the driver or via DMA map setup, and tmpbuf
1247 * seems to only come into existence in sndbuf_resize().
1248 */
1249 if (c->direction == PCMDIR_PLAY) {
1250 bs->sl = sndbuf_getmaxsize(bs);
1251 bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_NOWAIT);
1252 if (bs->shadbuf == NULL) {
1253 ret = ENOMEM;
1254 goto out;
1255 }
1256 }
1257
1258 out:
1259 CHN_UNLOCK(c);
1260 if (ret) {
1261 if (c->devinfo) {
1262 if (CHANNEL_FREE(c->methods, c->devinfo))
1263 sndbuf_free(b);
1264 }
1265 if (bs)
1266 sndbuf_destroy(bs);
1267 if (b)
1268 sndbuf_destroy(b);
1269 CHN_LOCK(c);
1270 c->flags |= CHN_F_DEAD;
1271 chn_lockdestroy(c);
1272
1273 return ret;
1274 }
1275
1276 return 0;
1277 }
1278
1279 void
chn_kill(struct pcm_channel * c)1280 chn_kill(struct pcm_channel *c)
1281 {
1282 struct snd_dbuf *b = c->bufhard;
1283 struct snd_dbuf *bs = c->bufsoft;
1284
1285 PCM_BUSYASSERT(c->parentsnddev);
1286
1287 if (CHN_STARTED(c)) {
1288 CHN_LOCK(c);
1289 chn_trigger(c, PCMTRIG_ABORT);
1290 CHN_UNLOCK(c);
1291 }
1292 while (chn_removefeeder(c) == 0)
1293 ;
1294 if (CHANNEL_FREE(c->methods, c->devinfo))
1295 sndbuf_free(b);
1296 sndbuf_destroy(bs);
1297 sndbuf_destroy(b);
1298 CHN_LOCK(c);
1299 c->flags |= CHN_F_DEAD;
1300 chn_lockdestroy(c);
1301 kobj_delete(c->methods, M_DEVBUF);
1302 free(c, M_DEVBUF);
1303 }
1304
1305 void
chn_shutdown(struct pcm_channel * c)1306 chn_shutdown(struct pcm_channel *c)
1307 {
1308 CHN_LOCKASSERT(c);
1309
1310 chn_wakeup(c);
1311 c->flags |= CHN_F_DEAD;
1312 }
1313
1314 /* release a locked channel and unlock it */
1315 int
chn_release(struct pcm_channel * c)1316 chn_release(struct pcm_channel *c)
1317 {
1318 PCM_BUSYASSERT(c->parentsnddev);
1319 CHN_LOCKASSERT(c);
1320
1321 c->flags &= ~CHN_F_BUSY;
1322 c->pid = -1;
1323 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm));
1324 CHN_UNLOCK(c);
1325
1326 return (0);
1327 }
1328
1329 int
chn_ref(struct pcm_channel * c,int ref)1330 chn_ref(struct pcm_channel *c, int ref)
1331 {
1332 PCM_BUSYASSERT(c->parentsnddev);
1333 CHN_LOCKASSERT(c);
1334 KASSERT((c->refcount + ref) >= 0,
1335 ("%s(): new refcount will be negative", __func__));
1336
1337 c->refcount += ref;
1338
1339 return (c->refcount);
1340 }
1341
1342 int
chn_setvolume_multi(struct pcm_channel * c,int vc,int left,int right,int center)1343 chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right,
1344 int center)
1345 {
1346 int i, ret;
1347
1348 ret = 0;
1349
1350 for (i = 0; i < SND_CHN_T_MAX; i++) {
1351 if ((1 << i) & SND_CHN_LEFT_MASK)
1352 ret |= chn_setvolume_matrix(c, vc, i, left);
1353 else if ((1 << i) & SND_CHN_RIGHT_MASK)
1354 ret |= chn_setvolume_matrix(c, vc, i, right) << 8;
1355 else
1356 ret |= chn_setvolume_matrix(c, vc, i, center) << 16;
1357 }
1358
1359 return (ret);
1360 }
1361
1362 int
chn_setvolume_matrix(struct pcm_channel * c,int vc,int vt,int val)1363 chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val)
1364 {
1365 int i;
1366
1367 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
1368 (vc == SND_VOL_C_MASTER || (vc & 1)) &&
1369 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN &&
1370 vt <= SND_CHN_T_END)) && (vt != SND_CHN_T_VOL_0DB ||
1371 (val >= SND_VOL_0DB_MIN && val <= SND_VOL_0DB_MAX)),
1372 ("%s(): invalid volume matrix c=%p vc=%d vt=%d val=%d",
1373 __func__, c, vc, vt, val));
1374 CHN_LOCKASSERT(c);
1375
1376 if (val < 0)
1377 val = 0;
1378 if (val > 100)
1379 val = 100;
1380
1381 c->volume[vc][vt] = val;
1382
1383 /*
1384 * Do relative calculation here and store it into class + 1
1385 * to ease the job of feeder_volume.
1386 */
1387 if (vc == SND_VOL_C_MASTER) {
1388 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END;
1389 vc += SND_VOL_C_STEP)
1390 c->volume[SND_VOL_C_VAL(vc)][vt] =
1391 SND_VOL_CALC_VAL(c->volume, vc, vt);
1392 } else if (vc & 1) {
1393 if (vt == SND_CHN_T_VOL_0DB)
1394 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END;
1395 i += SND_CHN_T_STEP) {
1396 c->volume[SND_VOL_C_VAL(vc)][i] =
1397 SND_VOL_CALC_VAL(c->volume, vc, i);
1398 }
1399 else
1400 c->volume[SND_VOL_C_VAL(vc)][vt] =
1401 SND_VOL_CALC_VAL(c->volume, vc, vt);
1402 }
1403
1404 return (val);
1405 }
1406
1407 int
chn_getvolume_matrix(struct pcm_channel * c,int vc,int vt)1408 chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt)
1409 {
1410 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
1411 (vt == SND_CHN_T_VOL_0DB ||
1412 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)),
1413 ("%s(): invalid volume matrix c=%p vc=%d vt=%d",
1414 __func__, c, vc, vt));
1415 CHN_LOCKASSERT(c);
1416
1417 return (c->volume[vc][vt]);
1418 }
1419
1420 int
chn_setmute_multi(struct pcm_channel * c,int vc,int mute)1421 chn_setmute_multi(struct pcm_channel *c, int vc, int mute)
1422 {
1423 int i, ret;
1424
1425 ret = 0;
1426
1427 for (i = 0; i < SND_CHN_T_MAX; i++) {
1428 if ((1 << i) & SND_CHN_LEFT_MASK)
1429 ret |= chn_setmute_matrix(c, vc, i, mute);
1430 else if ((1 << i) & SND_CHN_RIGHT_MASK)
1431 ret |= chn_setmute_matrix(c, vc, i, mute) << 8;
1432 else
1433 ret |= chn_setmute_matrix(c, vc, i, mute) << 16;
1434 }
1435 return (ret);
1436 }
1437
1438 int
chn_setmute_matrix(struct pcm_channel * c,int vc,int vt,int mute)1439 chn_setmute_matrix(struct pcm_channel *c, int vc, int vt, int mute)
1440 {
1441 int i;
1442
1443 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
1444 (vc == SND_VOL_C_MASTER || (vc & 1)) &&
1445 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)),
1446 ("%s(): invalid mute matrix c=%p vc=%d vt=%d mute=%d",
1447 __func__, c, vc, vt, mute));
1448
1449 CHN_LOCKASSERT(c);
1450
1451 mute = (mute != 0);
1452
1453 c->muted[vc][vt] = mute;
1454
1455 /*
1456 * Do relative calculation here and store it into class + 1
1457 * to ease the job of feeder_volume.
1458 */
1459 if (vc == SND_VOL_C_MASTER) {
1460 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END;
1461 vc += SND_VOL_C_STEP)
1462 c->muted[SND_VOL_C_VAL(vc)][vt] = mute;
1463 } else if (vc & 1) {
1464 if (vt == SND_CHN_T_VOL_0DB) {
1465 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END;
1466 i += SND_CHN_T_STEP) {
1467 c->muted[SND_VOL_C_VAL(vc)][i] = mute;
1468 }
1469 } else {
1470 c->muted[SND_VOL_C_VAL(vc)][vt] = mute;
1471 }
1472 }
1473 return (mute);
1474 }
1475
1476 int
chn_getmute_matrix(struct pcm_channel * c,int vc,int vt)1477 chn_getmute_matrix(struct pcm_channel *c, int vc, int vt)
1478 {
1479 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX &&
1480 (vt == SND_CHN_T_VOL_0DB ||
1481 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)),
1482 ("%s(): invalid mute matrix c=%p vc=%d vt=%d",
1483 __func__, c, vc, vt));
1484 CHN_LOCKASSERT(c);
1485
1486 return (c->muted[vc][vt]);
1487 }
1488
1489 struct pcmchan_matrix *
chn_getmatrix(struct pcm_channel * c)1490 chn_getmatrix(struct pcm_channel *c)
1491 {
1492
1493 KASSERT(c != NULL, ("%s(): NULL channel", __func__));
1494 CHN_LOCKASSERT(c);
1495
1496 if (!(c->format & AFMT_CONVERTIBLE))
1497 return (NULL);
1498
1499 return (&c->matrix);
1500 }
1501
1502 int
chn_setmatrix(struct pcm_channel * c,struct pcmchan_matrix * m)1503 chn_setmatrix(struct pcm_channel *c, struct pcmchan_matrix *m)
1504 {
1505
1506 KASSERT(c != NULL && m != NULL,
1507 ("%s(): NULL channel or matrix", __func__));
1508 CHN_LOCKASSERT(c);
1509
1510 if (!(c->format & AFMT_CONVERTIBLE))
1511 return (EINVAL);
1512
1513 c->matrix = *m;
1514 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL;
1515
1516 return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext)));
1517 }
1518
1519 /*
1520 * XXX chn_oss_* exists for the sake of compatibility.
1521 */
1522 int
chn_oss_getorder(struct pcm_channel * c,unsigned long long * map)1523 chn_oss_getorder(struct pcm_channel *c, unsigned long long *map)
1524 {
1525
1526 KASSERT(c != NULL && map != NULL,
1527 ("%s(): NULL channel or map", __func__));
1528 CHN_LOCKASSERT(c);
1529
1530 if (!(c->format & AFMT_CONVERTIBLE))
1531 return (EINVAL);
1532
1533 return (feeder_matrix_oss_get_channel_order(&c->matrix, map));
1534 }
1535
1536 int
chn_oss_setorder(struct pcm_channel * c,unsigned long long * map)1537 chn_oss_setorder(struct pcm_channel *c, unsigned long long *map)
1538 {
1539 struct pcmchan_matrix m;
1540 int ret;
1541
1542 KASSERT(c != NULL && map != NULL,
1543 ("%s(): NULL channel or map", __func__));
1544 CHN_LOCKASSERT(c);
1545
1546 if (!(c->format & AFMT_CONVERTIBLE))
1547 return (EINVAL);
1548
1549 m = c->matrix;
1550 ret = feeder_matrix_oss_set_channel_order(&m, map);
1551 if (ret != 0)
1552 return (ret);
1553
1554 return (chn_setmatrix(c, &m));
1555 }
1556
1557 #define SND_CHN_OSS_FRONT (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR)
1558 #define SND_CHN_OSS_SURR (SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR)
1559 #define SND_CHN_OSS_CENTER_LFE (SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF)
1560 #define SND_CHN_OSS_REAR (SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR)
1561
1562 int
chn_oss_getmask(struct pcm_channel * c,uint32_t * retmask)1563 chn_oss_getmask(struct pcm_channel *c, uint32_t *retmask)
1564 {
1565 struct pcmchan_matrix *m;
1566 struct pcmchan_caps *caps;
1567 uint32_t i, format;
1568
1569 KASSERT(c != NULL && retmask != NULL,
1570 ("%s(): NULL channel or retmask", __func__));
1571 CHN_LOCKASSERT(c);
1572
1573 caps = chn_getcaps(c);
1574 if (caps == NULL || caps->fmtlist == NULL)
1575 return (ENODEV);
1576
1577 for (i = 0; caps->fmtlist[i] != 0; i++) {
1578 format = caps->fmtlist[i];
1579 if (!(format & AFMT_CONVERTIBLE)) {
1580 *retmask |= DSP_BIND_SPDIF;
1581 continue;
1582 }
1583 m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format);
1584 if (m == NULL)
1585 continue;
1586 if (m->mask & SND_CHN_OSS_FRONT)
1587 *retmask |= DSP_BIND_FRONT;
1588 if (m->mask & SND_CHN_OSS_SURR)
1589 *retmask |= DSP_BIND_SURR;
1590 if (m->mask & SND_CHN_OSS_CENTER_LFE)
1591 *retmask |= DSP_BIND_CENTER_LFE;
1592 if (m->mask & SND_CHN_OSS_REAR)
1593 *retmask |= DSP_BIND_REAR;
1594 }
1595
1596 /* report software-supported binding mask */
1597 if (!CHN_BITPERFECT(c) && report_soft_matrix)
1598 *retmask |= DSP_BIND_FRONT | DSP_BIND_SURR |
1599 DSP_BIND_CENTER_LFE | DSP_BIND_REAR;
1600
1601 return (0);
1602 }
1603
1604 void
chn_vpc_reset(struct pcm_channel * c,int vc,int force)1605 chn_vpc_reset(struct pcm_channel *c, int vc, int force)
1606 {
1607 int i;
1608
1609 KASSERT(c != NULL && vc >= SND_VOL_C_BEGIN && vc <= SND_VOL_C_END,
1610 ("%s(): invalid reset c=%p vc=%d", __func__, c, vc));
1611 CHN_LOCKASSERT(c);
1612
1613 if (force == 0 && chn_vpc_autoreset == 0)
1614 return;
1615
1616 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP)
1617 CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]);
1618 }
1619
1620 static u_int32_t
round_pow2(u_int32_t v)1621 round_pow2(u_int32_t v)
1622 {
1623 u_int32_t ret;
1624
1625 if (v < 2)
1626 v = 2;
1627 ret = 0;
1628 while (v >> ret)
1629 ret++;
1630 ret = 1 << (ret - 1);
1631 while (ret < v)
1632 ret <<= 1;
1633 return ret;
1634 }
1635
1636 static u_int32_t
round_blksz(u_int32_t v,int round)1637 round_blksz(u_int32_t v, int round)
1638 {
1639 u_int32_t ret, tmp;
1640
1641 if (round < 1)
1642 round = 1;
1643
1644 ret = min(round_pow2(v), CHN_2NDBUFMAXSIZE >> 1);
1645
1646 if (ret > v && (ret >> 1) > 0 && (ret >> 1) >= ((v * 3) >> 2))
1647 ret >>= 1;
1648
1649 tmp = ret - (ret % round);
1650 while (tmp < 16 || tmp < round) {
1651 ret <<= 1;
1652 tmp = ret - (ret % round);
1653 }
1654
1655 return ret;
1656 }
1657
1658 /*
1659 * 4Front call it DSP Policy, while we call it "Latency Profile". The idea
1660 * is to keep 2nd buffer short so that it doesn't cause long queue during
1661 * buffer transfer.
1662 *
1663 * Latency reference table for 48khz stereo 16bit: (PLAY)
1664 *
1665 * +---------+------------+-----------+------------+
1666 * | Latency | Blockcount | Blocksize | Buffersize |
1667 * +---------+------------+-----------+------------+
1668 * | 0 | 2 | 64 | 128 |
1669 * +---------+------------+-----------+------------+
1670 * | 1 | 4 | 128 | 512 |
1671 * +---------+------------+-----------+------------+
1672 * | 2 | 8 | 512 | 4096 |
1673 * +---------+------------+-----------+------------+
1674 * | 3 | 16 | 512 | 8192 |
1675 * +---------+------------+-----------+------------+
1676 * | 4 | 32 | 512 | 16384 |
1677 * +---------+------------+-----------+------------+
1678 * | 5 | 32 | 1024 | 32768 |
1679 * +---------+------------+-----------+------------+
1680 * | 6 | 16 | 2048 | 32768 |
1681 * +---------+------------+-----------+------------+
1682 * | 7 | 8 | 4096 | 32768 |
1683 * +---------+------------+-----------+------------+
1684 * | 8 | 4 | 8192 | 32768 |
1685 * +---------+------------+-----------+------------+
1686 * | 9 | 2 | 16384 | 32768 |
1687 * +---------+------------+-----------+------------+
1688 * | 10 | 2 | 32768 | 65536 |
1689 * +---------+------------+-----------+------------+
1690 *
1691 * Recording need a different reference table. All we care is
1692 * gobbling up everything within reasonable buffering threshold.
1693 *
1694 * Latency reference table for 48khz stereo 16bit: (REC)
1695 *
1696 * +---------+------------+-----------+------------+
1697 * | Latency | Blockcount | Blocksize | Buffersize |
1698 * +---------+------------+-----------+------------+
1699 * | 0 | 512 | 32 | 16384 |
1700 * +---------+------------+-----------+------------+
1701 * | 1 | 256 | 64 | 16384 |
1702 * +---------+------------+-----------+------------+
1703 * | 2 | 128 | 128 | 16384 |
1704 * +---------+------------+-----------+------------+
1705 * | 3 | 64 | 256 | 16384 |
1706 * +---------+------------+-----------+------------+
1707 * | 4 | 32 | 512 | 16384 |
1708 * +---------+------------+-----------+------------+
1709 * | 5 | 32 | 1024 | 32768 |
1710 * +---------+------------+-----------+------------+
1711 * | 6 | 16 | 2048 | 32768 |
1712 * +---------+------------+-----------+------------+
1713 * | 7 | 8 | 4096 | 32768 |
1714 * +---------+------------+-----------+------------+
1715 * | 8 | 4 | 8192 | 32768 |
1716 * +---------+------------+-----------+------------+
1717 * | 9 | 2 | 16384 | 32768 |
1718 * +---------+------------+-----------+------------+
1719 * | 10 | 2 | 32768 | 65536 |
1720 * +---------+------------+-----------+------------+
1721 *
1722 * Calculations for other data rate are entirely based on these reference
1723 * tables. For normal operation, Latency 5 seems give the best, well
1724 * balanced performance for typical workload. Anything below 5 will
1725 * eat up CPU to keep up with increasing context switches because of
1726 * shorter buffer space and usually require the application to handle it
1727 * aggressively through possibly real time programming technique.
1728 *
1729 */
1730 #define CHN_LATENCY_PBLKCNT_REF \
1731 {{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}, \
1732 {1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}}
1733 #define CHN_LATENCY_PBUFSZ_REF \
1734 {{7, 9, 12, 13, 14, 15, 15, 15, 15, 15, 16}, \
1735 {11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 17}}
1736
1737 #define CHN_LATENCY_RBLKCNT_REF \
1738 {{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}, \
1739 {9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}}
1740 #define CHN_LATENCY_RBUFSZ_REF \
1741 {{14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16}, \
1742 {15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17}}
1743
1744 #define CHN_LATENCY_DATA_REF 192000 /* 48khz stereo 16bit ~ 48000 x 2 x 2 */
1745
1746 static int
chn_calclatency(int dir,int latency,int bps,u_int32_t datarate,u_int32_t max,int * rblksz,int * rblkcnt)1747 chn_calclatency(int dir, int latency, int bps, u_int32_t datarate,
1748 u_int32_t max, int *rblksz, int *rblkcnt)
1749 {
1750 static int pblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
1751 CHN_LATENCY_PBLKCNT_REF;
1752 static int pbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
1753 CHN_LATENCY_PBUFSZ_REF;
1754 static int rblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
1755 CHN_LATENCY_RBLKCNT_REF;
1756 static int rbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] =
1757 CHN_LATENCY_RBUFSZ_REF;
1758 u_int32_t bufsz;
1759 int lprofile, blksz, blkcnt;
1760
1761 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX ||
1762 bps < 1 || datarate < 1 ||
1763 !(dir == PCMDIR_PLAY || dir == PCMDIR_REC)) {
1764 if (rblksz != NULL)
1765 *rblksz = CHN_2NDBUFMAXSIZE >> 1;
1766 if (rblkcnt != NULL)
1767 *rblkcnt = 2;
1768 printf("%s(): FAILED dir=%d latency=%d bps=%d "
1769 "datarate=%u max=%u\n",
1770 __func__, dir, latency, bps, datarate, max);
1771 return CHN_2NDBUFMAXSIZE;
1772 }
1773
1774 lprofile = chn_latency_profile;
1775
1776 if (dir == PCMDIR_PLAY) {
1777 blkcnt = pblkcnts[lprofile][latency];
1778 bufsz = pbufszs[lprofile][latency];
1779 } else {
1780 blkcnt = rblkcnts[lprofile][latency];
1781 bufsz = rbufszs[lprofile][latency];
1782 }
1783
1784 bufsz = round_pow2(snd_xbytes(1 << bufsz, CHN_LATENCY_DATA_REF,
1785 datarate));
1786 if (bufsz > max)
1787 bufsz = max;
1788 blksz = round_blksz(bufsz >> blkcnt, bps);
1789
1790 if (rblksz != NULL)
1791 *rblksz = blksz;
1792 if (rblkcnt != NULL)
1793 *rblkcnt = 1 << blkcnt;
1794
1795 return blksz << blkcnt;
1796 }
1797
1798 static int
chn_resizebuf(struct pcm_channel * c,int latency,int blkcnt,int blksz)1799 chn_resizebuf(struct pcm_channel *c, int latency,
1800 int blkcnt, int blksz)
1801 {
1802 struct snd_dbuf *b, *bs, *pb;
1803 int sblksz, sblkcnt, hblksz, hblkcnt, limit = 0, nsblksz, nsblkcnt;
1804 int ret;
1805
1806 CHN_LOCKASSERT(c);
1807
1808 if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) ||
1809 !(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC))
1810 return EINVAL;
1811
1812 if (latency == -1) {
1813 c->latency = -1;
1814 latency = chn_latency;
1815 } else if (latency == -2) {
1816 latency = c->latency;
1817 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX)
1818 latency = chn_latency;
1819 } else if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX)
1820 return EINVAL;
1821 else {
1822 c->latency = latency;
1823 }
1824
1825 bs = c->bufsoft;
1826 b = c->bufhard;
1827
1828 if (!(blksz == 0 || blkcnt == -1) &&
1829 (blksz < 16 || blksz < sndbuf_getalign(bs) || blkcnt < 2 ||
1830 (blksz * blkcnt) > CHN_2NDBUFMAXSIZE))
1831 return EINVAL;
1832
1833 chn_calclatency(c->direction, latency, sndbuf_getalign(bs),
1834 sndbuf_getalign(bs) * sndbuf_getspd(bs), CHN_2NDBUFMAXSIZE,
1835 &sblksz, &sblkcnt);
1836
1837 if (blksz == 0 || blkcnt == -1) {
1838 if (blkcnt == -1)
1839 c->flags &= ~CHN_F_HAS_SIZE;
1840 if (c->flags & CHN_F_HAS_SIZE) {
1841 blksz = sndbuf_getblksz(bs);
1842 blkcnt = sndbuf_getblkcnt(bs);
1843 }
1844 } else
1845 c->flags |= CHN_F_HAS_SIZE;
1846
1847 if (c->flags & CHN_F_HAS_SIZE) {
1848 /*
1849 * The application has requested their own blksz/blkcnt.
1850 * Just obey with it, and let them toast alone. We can
1851 * clamp it to the nearest latency profile, but that would
1852 * defeat the purpose of having custom control. The least
1853 * we can do is round it to the nearest ^2 and align it.
1854 */
1855 sblksz = round_blksz(blksz, sndbuf_getalign(bs));
1856 sblkcnt = round_pow2(blkcnt);
1857 }
1858
1859 if (c->parentchannel != NULL) {
1860 pb = c->parentchannel->bufsoft;
1861 CHN_UNLOCK(c);
1862 CHN_LOCK(c->parentchannel);
1863 chn_notify(c->parentchannel, CHN_N_BLOCKSIZE);
1864 CHN_UNLOCK(c->parentchannel);
1865 CHN_LOCK(c);
1866 if (c->direction == PCMDIR_PLAY) {
1867 limit = (pb != NULL) ?
1868 sndbuf_xbytes(sndbuf_getsize(pb), pb, bs) : 0;
1869 } else {
1870 limit = (pb != NULL) ?
1871 sndbuf_xbytes(sndbuf_getblksz(pb), pb, bs) * 2 : 0;
1872 }
1873 } else {
1874 hblkcnt = 2;
1875 if (c->flags & CHN_F_HAS_SIZE) {
1876 hblksz = round_blksz(sndbuf_xbytes(sblksz, bs, b),
1877 sndbuf_getalign(b));
1878 hblkcnt = round_pow2(sndbuf_getblkcnt(bs));
1879 } else
1880 chn_calclatency(c->direction, latency,
1881 sndbuf_getalign(b),
1882 sndbuf_getalign(b) * sndbuf_getspd(b),
1883 CHN_2NDBUFMAXSIZE, &hblksz, &hblkcnt);
1884
1885 if ((hblksz << 1) > sndbuf_getmaxsize(b))
1886 hblksz = round_blksz(sndbuf_getmaxsize(b) >> 1,
1887 sndbuf_getalign(b));
1888
1889 while ((hblksz * hblkcnt) > sndbuf_getmaxsize(b)) {
1890 if (hblkcnt < 4)
1891 hblksz >>= 1;
1892 else
1893 hblkcnt >>= 1;
1894 }
1895
1896 hblksz -= hblksz % sndbuf_getalign(b);
1897
1898 #if 0
1899 hblksz = sndbuf_getmaxsize(b) >> 1;
1900 hblksz -= hblksz % sndbuf_getalign(b);
1901 hblkcnt = 2;
1902 #endif
1903
1904 CHN_UNLOCK(c);
1905 if (chn_usefrags == 0 ||
1906 CHANNEL_SETFRAGMENTS(c->methods, c->devinfo,
1907 hblksz, hblkcnt) != 0)
1908 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods,
1909 c->devinfo, hblksz));
1910 CHN_LOCK(c);
1911
1912 if (!CHN_EMPTY(c, children)) {
1913 nsblksz = round_blksz(
1914 sndbuf_xbytes(sndbuf_getblksz(b), b, bs),
1915 sndbuf_getalign(bs));
1916 nsblkcnt = sndbuf_getblkcnt(b);
1917 if (c->direction == PCMDIR_PLAY) {
1918 do {
1919 nsblkcnt--;
1920 } while (nsblkcnt >= 2 &&
1921 nsblksz * nsblkcnt >= sblksz * sblkcnt);
1922 nsblkcnt++;
1923 }
1924 sblksz = nsblksz;
1925 sblkcnt = nsblkcnt;
1926 limit = 0;
1927 } else
1928 limit = sndbuf_xbytes(sndbuf_getblksz(b), b, bs) * 2;
1929 }
1930
1931 if (limit > CHN_2NDBUFMAXSIZE)
1932 limit = CHN_2NDBUFMAXSIZE;
1933
1934 #if 0
1935 while (limit > 0 && (sblksz * sblkcnt) > limit) {
1936 if (sblkcnt < 4)
1937 break;
1938 sblkcnt >>= 1;
1939 }
1940 #endif
1941
1942 while ((sblksz * sblkcnt) < limit)
1943 sblkcnt <<= 1;
1944
1945 while ((sblksz * sblkcnt) > CHN_2NDBUFMAXSIZE) {
1946 if (sblkcnt < 4)
1947 sblksz >>= 1;
1948 else
1949 sblkcnt >>= 1;
1950 }
1951
1952 sblksz -= sblksz % sndbuf_getalign(bs);
1953
1954 if (sndbuf_getblkcnt(bs) != sblkcnt || sndbuf_getblksz(bs) != sblksz ||
1955 sndbuf_getsize(bs) != (sblkcnt * sblksz)) {
1956 ret = sndbuf_remalloc(bs, sblkcnt, sblksz);
1957 if (ret != 0) {
1958 device_printf(c->dev, "%s(): Failed: %d %d\n",
1959 __func__, sblkcnt, sblksz);
1960 return ret;
1961 }
1962 }
1963
1964 /*
1965 * Interrupt timeout
1966 */
1967 c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) /
1968 ((u_int64_t)sndbuf_getspd(bs) * sndbuf_getalign(bs));
1969 if (c->parentchannel != NULL)
1970 c->timeout = min(c->timeout, c->parentchannel->timeout);
1971 if (c->timeout < 1)
1972 c->timeout = 1;
1973
1974 /*
1975 * OSSv4 docs: "By default OSS will set the low water level equal
1976 * to the fragment size which is optimal in most cases."
1977 */
1978 c->lw = sndbuf_getblksz(bs);
1979 chn_resetbuf(c);
1980
1981 if (snd_verbose > 3)
1982 device_printf(c->dev, "%s(): %s (%s) timeout=%u "
1983 "b[%d/%d/%d] bs[%d/%d/%d] limit=%d\n",
1984 __func__, CHN_DIRSTR(c),
1985 (c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware",
1986 c->timeout,
1987 sndbuf_getsize(b), sndbuf_getblksz(b),
1988 sndbuf_getblkcnt(b),
1989 sndbuf_getsize(bs), sndbuf_getblksz(bs),
1990 sndbuf_getblkcnt(bs), limit);
1991
1992 return 0;
1993 }
1994
1995 int
chn_setlatency(struct pcm_channel * c,int latency)1996 chn_setlatency(struct pcm_channel *c, int latency)
1997 {
1998 CHN_LOCKASSERT(c);
1999 /* Destroy blksz/blkcnt, enforce latency profile. */
2000 return chn_resizebuf(c, latency, -1, 0);
2001 }
2002
2003 int
chn_setblocksize(struct pcm_channel * c,int blkcnt,int blksz)2004 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz)
2005 {
2006 CHN_LOCKASSERT(c);
2007 /* Destroy latency profile, enforce blksz/blkcnt */
2008 return chn_resizebuf(c, -1, blkcnt, blksz);
2009 }
2010
2011 int
chn_setparam(struct pcm_channel * c,uint32_t format,uint32_t speed)2012 chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed)
2013 {
2014 struct pcmchan_caps *caps;
2015 uint32_t hwspeed, delta;
2016 int ret;
2017
2018 CHN_LOCKASSERT(c);
2019
2020 if (speed < 1 || format == 0 || CHN_STARTED(c))
2021 return (EINVAL);
2022
2023 c->format = format;
2024 c->speed = speed;
2025
2026 caps = chn_getcaps(c);
2027
2028 hwspeed = speed;
2029 RANGE(hwspeed, caps->minspeed, caps->maxspeed);
2030
2031 sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo,
2032 hwspeed));
2033 hwspeed = sndbuf_getspd(c->bufhard);
2034
2035 delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed);
2036
2037 if (delta <= feeder_rate_round)
2038 c->speed = hwspeed;
2039
2040 ret = feeder_chain(c);
2041
2042 if (ret == 0)
2043 ret = CHANNEL_SETFORMAT(c->methods, c->devinfo,
2044 sndbuf_getfmt(c->bufhard));
2045
2046 if (ret == 0)
2047 ret = chn_resizebuf(c, -2, 0, 0);
2048
2049 return (ret);
2050 }
2051
2052 int
chn_setspeed(struct pcm_channel * c,uint32_t speed)2053 chn_setspeed(struct pcm_channel *c, uint32_t speed)
2054 {
2055 uint32_t oldformat, oldspeed, format;
2056 int ret;
2057
2058 #if 0
2059 /* XXX force 48k */
2060 if (c->format & AFMT_PASSTHROUGH)
2061 speed = AFMT_PASSTHROUGH_RATE;
2062 #endif
2063
2064 oldformat = c->format;
2065 oldspeed = c->speed;
2066 format = oldformat;
2067
2068 ret = chn_setparam(c, format, speed);
2069 if (ret != 0) {
2070 if (snd_verbose > 3)
2071 device_printf(c->dev,
2072 "%s(): Setting speed %d failed, "
2073 "falling back to %d\n",
2074 __func__, speed, oldspeed);
2075 chn_setparam(c, c->format, oldspeed);
2076 }
2077
2078 return (ret);
2079 }
2080
2081 int
chn_setformat(struct pcm_channel * c,uint32_t format)2082 chn_setformat(struct pcm_channel *c, uint32_t format)
2083 {
2084 uint32_t oldformat, oldspeed, speed;
2085 int ret;
2086
2087 /* XXX force stereo */
2088 if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) {
2089 format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL,
2090 AFMT_PASSTHROUGH_EXTCHANNEL);
2091 }
2092
2093 oldformat = c->format;
2094 oldspeed = c->speed;
2095 speed = oldspeed;
2096
2097 ret = chn_setparam(c, format, speed);
2098 if (ret != 0) {
2099 if (snd_verbose > 3)
2100 device_printf(c->dev,
2101 "%s(): Format change 0x%08x failed, "
2102 "falling back to 0x%08x\n",
2103 __func__, format, oldformat);
2104 chn_setparam(c, oldformat, oldspeed);
2105 }
2106
2107 return (ret);
2108 }
2109
2110 void
chn_syncstate(struct pcm_channel * c)2111 chn_syncstate(struct pcm_channel *c)
2112 {
2113 struct snddev_info *d;
2114 struct snd_mixer *m;
2115
2116 d = (c != NULL) ? c->parentsnddev : NULL;
2117 m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 :
2118 NULL;
2119
2120 if (d == NULL || m == NULL)
2121 return;
2122
2123 CHN_LOCKASSERT(c);
2124
2125 if (c->feederflags & (1 << FEEDER_VOLUME)) {
2126 uint32_t parent;
2127 int vol, pvol, left, right, center;
2128
2129 if (c->direction == PCMDIR_PLAY &&
2130 (d->flags & SD_F_SOFTPCMVOL)) {
2131 /* CHN_UNLOCK(c); */
2132 vol = mix_get(m, SOUND_MIXER_PCM);
2133 parent = mix_getparent(m, SOUND_MIXER_PCM);
2134 if (parent != SOUND_MIXER_NONE)
2135 pvol = mix_get(m, parent);
2136 else
2137 pvol = 100 | (100 << 8);
2138 /* CHN_LOCK(c); */
2139 } else {
2140 vol = 100 | (100 << 8);
2141 pvol = vol;
2142 }
2143
2144 if (vol == -1) {
2145 device_printf(c->dev,
2146 "Soft PCM Volume: Failed to read pcm "
2147 "default value\n");
2148 vol = 100 | (100 << 8);
2149 }
2150
2151 if (pvol == -1) {
2152 device_printf(c->dev,
2153 "Soft PCM Volume: Failed to read parent "
2154 "default value\n");
2155 pvol = 100 | (100 << 8);
2156 }
2157
2158 left = ((vol & 0x7f) * (pvol & 0x7f)) / 100;
2159 right = (((vol >> 8) & 0x7f) * ((pvol >> 8) & 0x7f)) / 100;
2160 center = (left + right) >> 1;
2161
2162 chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right, center);
2163 }
2164
2165 if (c->feederflags & (1 << FEEDER_EQ)) {
2166 struct pcm_feeder *f;
2167 int treble, bass, state;
2168
2169 /* CHN_UNLOCK(c); */
2170 treble = mix_get(m, SOUND_MIXER_TREBLE);
2171 bass = mix_get(m, SOUND_MIXER_BASS);
2172 /* CHN_LOCK(c); */
2173
2174 if (treble == -1)
2175 treble = 50;
2176 else
2177 treble = ((treble & 0x7f) +
2178 ((treble >> 8) & 0x7f)) >> 1;
2179
2180 if (bass == -1)
2181 bass = 50;
2182 else
2183 bass = ((bass & 0x7f) + ((bass >> 8) & 0x7f)) >> 1;
2184
2185 f = chn_findfeeder(c, FEEDER_EQ);
2186 if (f != NULL) {
2187 if (FEEDER_SET(f, FEEDEQ_TREBLE, treble) != 0)
2188 device_printf(c->dev,
2189 "EQ: Failed to set treble -- %d\n",
2190 treble);
2191 if (FEEDER_SET(f, FEEDEQ_BASS, bass) != 0)
2192 device_printf(c->dev,
2193 "EQ: Failed to set bass -- %d\n",
2194 bass);
2195 if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0)
2196 device_printf(c->dev,
2197 "EQ: Failed to set preamp -- %d\n",
2198 d->eqpreamp);
2199 if (d->flags & SD_F_EQ_BYPASSED)
2200 state = FEEDEQ_BYPASS;
2201 else if (d->flags & SD_F_EQ_ENABLED)
2202 state = FEEDEQ_ENABLE;
2203 else
2204 state = FEEDEQ_DISABLE;
2205 if (FEEDER_SET(f, FEEDEQ_STATE, state) != 0)
2206 device_printf(c->dev,
2207 "EQ: Failed to set state -- %d\n", state);
2208 }
2209 }
2210 }
2211
2212 int
chn_trigger(struct pcm_channel * c,int go)2213 chn_trigger(struct pcm_channel *c, int go)
2214 {
2215 struct snddev_info *d = c->parentsnddev;
2216 int ret;
2217
2218 CHN_LOCKASSERT(c);
2219 if (!PCMTRIG_COMMON(go))
2220 return (CHANNEL_TRIGGER(c->methods, c->devinfo, go));
2221
2222 if (go == c->trigger)
2223 return (0);
2224
2225 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go);
2226 if (ret != 0)
2227 return (ret);
2228
2229 switch (go) {
2230 case PCMTRIG_START:
2231 if (snd_verbose > 3)
2232 device_printf(c->dev,
2233 "%s() %s: calling go=0x%08x , "
2234 "prev=0x%08x\n", __func__, c->name, go,
2235 c->trigger);
2236 if (c->trigger != PCMTRIG_START) {
2237 c->trigger = go;
2238 CHN_UNLOCK(c);
2239 PCM_LOCK(d);
2240 CHN_INSERT_HEAD(d, c, channels.pcm.busy);
2241 PCM_UNLOCK(d);
2242 CHN_LOCK(c);
2243 chn_syncstate(c);
2244 }
2245 break;
2246 case PCMTRIG_STOP:
2247 case PCMTRIG_ABORT:
2248 if (snd_verbose > 3)
2249 device_printf(c->dev,
2250 "%s() %s: calling go=0x%08x , "
2251 "prev=0x%08x\n", __func__, c->name, go,
2252 c->trigger);
2253 if (c->trigger == PCMTRIG_START) {
2254 c->trigger = go;
2255 CHN_UNLOCK(c);
2256 PCM_LOCK(d);
2257 CHN_REMOVE(d, c, channels.pcm.busy);
2258 PCM_UNLOCK(d);
2259 CHN_LOCK(c);
2260 }
2261 break;
2262 default:
2263 break;
2264 }
2265
2266 return (0);
2267 }
2268
2269 /**
2270 * @brief Queries sound driver for sample-aligned hardware buffer pointer index
2271 *
2272 * This function obtains the hardware pointer location, then aligns it to
2273 * the current bytes-per-sample value before returning. (E.g., a channel
2274 * running in 16 bit stereo mode would require 4 bytes per sample, so a
2275 * hwptr value ranging from 32-35 would be returned as 32.)
2276 *
2277 * @param c PCM channel context
2278 * @returns sample-aligned hardware buffer pointer index
2279 */
2280 int
chn_getptr(struct pcm_channel * c)2281 chn_getptr(struct pcm_channel *c)
2282 {
2283 int hwptr;
2284
2285 CHN_LOCKASSERT(c);
2286 hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0;
2287 return (hwptr - (hwptr % sndbuf_getalign(c->bufhard)));
2288 }
2289
2290 struct pcmchan_caps *
chn_getcaps(struct pcm_channel * c)2291 chn_getcaps(struct pcm_channel *c)
2292 {
2293 CHN_LOCKASSERT(c);
2294 return CHANNEL_GETCAPS(c->methods, c->devinfo);
2295 }
2296
2297 u_int32_t
chn_getformats(struct pcm_channel * c)2298 chn_getformats(struct pcm_channel *c)
2299 {
2300 u_int32_t *fmtlist, fmts;
2301 int i;
2302
2303 fmtlist = chn_getcaps(c)->fmtlist;
2304 fmts = 0;
2305 for (i = 0; fmtlist[i]; i++)
2306 fmts |= fmtlist[i];
2307
2308 /* report software-supported formats */
2309 if (!CHN_BITPERFECT(c) && report_soft_formats)
2310 fmts |= AFMT_CONVERTIBLE;
2311
2312 return (AFMT_ENCODING(fmts));
2313 }
2314
2315 int
chn_notify(struct pcm_channel * c,u_int32_t flags)2316 chn_notify(struct pcm_channel *c, u_int32_t flags)
2317 {
2318 struct pcm_channel *ch;
2319 struct pcmchan_caps *caps;
2320 uint32_t bestformat, bestspeed, besthwformat, *vchanformat, *vchanrate;
2321 uint32_t vpflags;
2322 int dirty, err, run, nrun;
2323
2324 CHN_LOCKASSERT(c);
2325
2326 if (CHN_EMPTY(c, children))
2327 return (ENODEV);
2328
2329 err = 0;
2330
2331 /*
2332 * If the hwchan is running, we can't change its rate, format or
2333 * blocksize
2334 */
2335 run = (CHN_STARTED(c)) ? 1 : 0;
2336 if (run)
2337 flags &= CHN_N_VOLUME | CHN_N_TRIGGER;
2338
2339 if (flags & CHN_N_RATE) {
2340 /*
2341 * XXX I'll make good use of this someday.
2342 * However this is currently being superseded by
2343 * the availability of CHN_F_VCHAN_DYNAMIC.
2344 */
2345 }
2346
2347 if (flags & CHN_N_FORMAT) {
2348 /*
2349 * XXX I'll make good use of this someday.
2350 * However this is currently being superseded by
2351 * the availability of CHN_F_VCHAN_DYNAMIC.
2352 */
2353 }
2354
2355 if (flags & CHN_N_VOLUME) {
2356 /*
2357 * XXX I'll make good use of this someday, though
2358 * soft volume control is currently pretty much
2359 * integrated.
2360 */
2361 }
2362
2363 if (flags & CHN_N_BLOCKSIZE) {
2364 /*
2365 * Set to default latency profile
2366 */
2367 chn_setlatency(c, chn_latency);
2368 }
2369
2370 if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) {
2371 nrun = CHN_EMPTY(c, children.busy) ? 0 : 1;
2372 if (nrun && !run)
2373 err = chn_start(c, 1);
2374 if (!nrun && run)
2375 chn_abort(c);
2376 flags &= ~CHN_N_TRIGGER;
2377 }
2378
2379 if (flags & CHN_N_TRIGGER) {
2380 if (c->direction == PCMDIR_PLAY) {
2381 vchanformat = &c->parentsnddev->pvchanformat;
2382 vchanrate = &c->parentsnddev->pvchanrate;
2383 } else {
2384 vchanformat = &c->parentsnddev->rvchanformat;
2385 vchanrate = &c->parentsnddev->rvchanrate;
2386 }
2387
2388 /* Dynamic Virtual Channel */
2389 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) {
2390 bestformat = *vchanformat;
2391 bestspeed = *vchanrate;
2392 } else {
2393 bestformat = 0;
2394 bestspeed = 0;
2395 }
2396
2397 besthwformat = 0;
2398 nrun = 0;
2399 caps = chn_getcaps(c);
2400 dirty = 0;
2401 vpflags = 0;
2402
2403 CHN_FOREACH(ch, c, children.busy) {
2404 CHN_LOCK(ch);
2405 if ((ch->format & AFMT_PASSTHROUGH) &&
2406 snd_fmtvalid(ch->format, caps->fmtlist)) {
2407 bestformat = ch->format;
2408 bestspeed = ch->speed;
2409 CHN_UNLOCK(ch);
2410 vpflags = CHN_F_PASSTHROUGH;
2411 nrun++;
2412 break;
2413 }
2414 if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) {
2415 if (c->flags & CHN_F_VCHAN_ADAPTIVE) {
2416 bestspeed = ch->speed;
2417 RANGE(bestspeed, caps->minspeed,
2418 caps->maxspeed);
2419 besthwformat = snd_fmtbest(ch->format,
2420 caps->fmtlist);
2421 if (besthwformat != 0)
2422 bestformat = besthwformat;
2423 }
2424 CHN_UNLOCK(ch);
2425 vpflags = CHN_F_EXCLUSIVE;
2426 nrun++;
2427 continue;
2428 }
2429 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) ||
2430 vpflags != 0) {
2431 CHN_UNLOCK(ch);
2432 nrun++;
2433 continue;
2434 }
2435 if (ch->speed > bestspeed) {
2436 bestspeed = ch->speed;
2437 RANGE(bestspeed, caps->minspeed,
2438 caps->maxspeed);
2439 }
2440 besthwformat = snd_fmtbest(ch->format, caps->fmtlist);
2441 if (!(besthwformat & AFMT_VCHAN)) {
2442 CHN_UNLOCK(ch);
2443 nrun++;
2444 continue;
2445 }
2446 if (AFMT_CHANNEL(besthwformat) >
2447 AFMT_CHANNEL(bestformat))
2448 bestformat = besthwformat;
2449 else if (AFMT_CHANNEL(besthwformat) ==
2450 AFMT_CHANNEL(bestformat) &&
2451 AFMT_BIT(besthwformat) > AFMT_BIT(bestformat))
2452 bestformat = besthwformat;
2453 CHN_UNLOCK(ch);
2454 nrun++;
2455 }
2456
2457 if (bestformat == 0)
2458 bestformat = c->format;
2459 if (bestspeed == 0)
2460 bestspeed = c->speed;
2461
2462 if (bestformat != c->format || bestspeed != c->speed)
2463 dirty = 1;
2464
2465 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE);
2466 c->flags |= vpflags;
2467
2468 if (nrun && !run) {
2469 if (dirty) {
2470 bestspeed = CHANNEL_SETSPEED(c->methods,
2471 c->devinfo, bestspeed);
2472 err = chn_reset(c, bestformat, bestspeed);
2473 }
2474 if (err == 0 && dirty) {
2475 CHN_FOREACH(ch, c, children.busy) {
2476 CHN_LOCK(ch);
2477 if (VCHAN_SYNC_REQUIRED(ch))
2478 vchan_sync(ch);
2479 CHN_UNLOCK(ch);
2480 }
2481 }
2482 if (err == 0) {
2483 if (dirty)
2484 c->flags |= CHN_F_DIRTY;
2485 err = chn_start(c, 1);
2486 }
2487 }
2488
2489 if (nrun && run && dirty) {
2490 chn_abort(c);
2491 bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo,
2492 bestspeed);
2493 err = chn_reset(c, bestformat, bestspeed);
2494 if (err == 0) {
2495 CHN_FOREACH(ch, c, children.busy) {
2496 CHN_LOCK(ch);
2497 if (VCHAN_SYNC_REQUIRED(ch))
2498 vchan_sync(ch);
2499 CHN_UNLOCK(ch);
2500 }
2501 }
2502 if (err == 0) {
2503 c->flags |= CHN_F_DIRTY;
2504 err = chn_start(c, 1);
2505 }
2506 }
2507
2508 if (err == 0 && !(bestformat & AFMT_PASSTHROUGH) &&
2509 (bestformat & AFMT_VCHAN)) {
2510 *vchanformat = bestformat;
2511 *vchanrate = bestspeed;
2512 }
2513
2514 if (!nrun && run) {
2515 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE);
2516 bestformat = *vchanformat;
2517 bestspeed = *vchanrate;
2518 chn_abort(c);
2519 if (c->format != bestformat || c->speed != bestspeed)
2520 chn_reset(c, bestformat, bestspeed);
2521 }
2522 }
2523
2524 return (err);
2525 }
2526
2527 /**
2528 * @brief Fetch array of supported discrete sample rates
2529 *
2530 * Wrapper for CHANNEL_GETRATES. Please see channel_if.m:getrates() for
2531 * detailed information.
2532 *
2533 * @note If the operation isn't supported, this function will just return 0
2534 * (no rates in the array), and *rates will be set to NULL. Callers
2535 * should examine rates @b only if this function returns non-zero.
2536 *
2537 * @param c pcm channel to examine
2538 * @param rates pointer to array of integers; rate table will be recorded here
2539 *
2540 * @return number of rates in the array pointed to be @c rates
2541 */
2542 int
chn_getrates(struct pcm_channel * c,int ** rates)2543 chn_getrates(struct pcm_channel *c, int **rates)
2544 {
2545 KASSERT(rates != NULL, ("rates is null"));
2546 CHN_LOCKASSERT(c);
2547 return CHANNEL_GETRATES(c->methods, c->devinfo, rates);
2548 }
2549
2550 /**
2551 * @brief Remove channel from a sync group, if there is one.
2552 *
2553 * This function is initially intended for the following conditions:
2554 * - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl)
2555 * - Closing a device. (A channel can't be destroyed if it's still in use.)
2556 *
2557 * @note Before calling this function, the syncgroup list mutex must be
2558 * held. (Consider pcm_channel::sm protected by the SG list mutex
2559 * whether @c c is locked or not.)
2560 *
2561 * @param c channel device to be started or closed
2562 * @returns If this channel was the only member of a group, the group ID
2563 * is returned to the caller so that the caller can release it
2564 * via free_unr() after giving up the syncgroup lock. Else it
2565 * returns 0.
2566 */
2567 int
chn_syncdestroy(struct pcm_channel * c)2568 chn_syncdestroy(struct pcm_channel *c)
2569 {
2570 struct pcmchan_syncmember *sm;
2571 struct pcmchan_syncgroup *sg;
2572 int sg_id;
2573
2574 sg_id = 0;
2575
2576 PCM_SG_LOCKASSERT(MA_OWNED);
2577
2578 if (c->sm != NULL) {
2579 sm = c->sm;
2580 sg = sm->parent;
2581 c->sm = NULL;
2582
2583 KASSERT(sg != NULL, ("syncmember has null parent"));
2584
2585 SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link);
2586 free(sm, M_DEVBUF);
2587
2588 if (SLIST_EMPTY(&sg->members)) {
2589 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link);
2590 sg_id = sg->id;
2591 free(sg, M_DEVBUF);
2592 }
2593 }
2594
2595 return sg_id;
2596 }
2597
2598 #ifdef OSSV4_EXPERIMENT
2599 int
chn_getpeaks(struct pcm_channel * c,int * lpeak,int * rpeak)2600 chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak)
2601 {
2602 CHN_LOCKASSERT(c);
2603 return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak);
2604 }
2605 #endif
2606