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 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 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 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 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 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 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 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 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 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 292 chn_pollreset(struct pcm_channel *c) 293 { 294 295 CHN_LOCKASSERT(c); 296 sndbuf_updateprevtotal(c->bufsoft); 297 } 298 299 static void 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 * 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 * 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 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 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 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 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 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