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 static struct unrhdr * 1161 chn_getunr(struct snddev_info *d, int type) 1162 { 1163 switch (type) { 1164 case PCMDIR_PLAY: 1165 return (d->p_unr); 1166 case PCMDIR_PLAY_VIRTUAL: 1167 return (d->vp_unr); 1168 case PCMDIR_REC: 1169 return (d->r_unr); 1170 case PCMDIR_REC_VIRTUAL: 1171 return (d->vr_unr); 1172 default: 1173 __assert_unreachable(); 1174 } 1175 1176 } 1177 1178 char * 1179 chn_mkname(char *buf, size_t len, struct pcm_channel *c) 1180 { 1181 const char *str; 1182 1183 KASSERT(buf != NULL && len != 0, 1184 ("%s(): bogus buf=%p len=%zu", __func__, buf, len)); 1185 1186 switch (c->type) { 1187 case PCMDIR_PLAY: 1188 str = "play"; 1189 break; 1190 case PCMDIR_PLAY_VIRTUAL: 1191 str = "virtual_play"; 1192 break; 1193 case PCMDIR_REC: 1194 str = "record"; 1195 break; 1196 case PCMDIR_REC_VIRTUAL: 1197 str = "virtual_record"; 1198 break; 1199 default: 1200 __assert_unreachable(); 1201 } 1202 1203 snprintf(buf, len, "dsp%d.%s.%d", 1204 device_get_unit(c->dev), str, c->unit); 1205 1206 return (buf); 1207 } 1208 1209 struct pcm_channel * 1210 chn_init(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, 1211 int dir, void *devinfo) 1212 { 1213 struct pcm_channel *c; 1214 struct feeder_class *fc; 1215 struct snd_dbuf *b, *bs; 1216 char buf[CHN_NAMELEN]; 1217 int i, direction; 1218 1219 PCM_BUSYASSERT(d); 1220 PCM_LOCKASSERT(d); 1221 1222 switch (dir) { 1223 case PCMDIR_PLAY: 1224 case PCMDIR_PLAY_VIRTUAL: 1225 direction = PCMDIR_PLAY; 1226 break; 1227 case PCMDIR_REC: 1228 case PCMDIR_REC_VIRTUAL: 1229 direction = PCMDIR_REC; 1230 break; 1231 default: 1232 device_printf(d->dev, 1233 "%s(): invalid channel direction: %d\n", 1234 __func__, dir); 1235 return (NULL); 1236 } 1237 1238 PCM_UNLOCK(d); 1239 b = NULL; 1240 bs = NULL; 1241 1242 c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK | M_ZERO); 1243 c->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 1244 chn_lockinit(c, dir); 1245 CHN_INIT(c, children); 1246 CHN_INIT(c, children.busy); 1247 c->direction = direction; 1248 c->type = dir; 1249 c->unit = alloc_unr(chn_getunr(d, c->type)); 1250 c->format = SND_FORMAT(AFMT_U8, 1, 0); 1251 c->speed = DSP_DEFAULT_SPEED; 1252 c->pid = -1; 1253 c->latency = -1; 1254 c->timeout = 1; 1255 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 1256 c->parentsnddev = d; 1257 c->parentchannel = parent; 1258 c->dev = d->dev; 1259 c->trigger = PCMTRIG_STOP; 1260 strlcpy(c->name, chn_mkname(buf, sizeof(buf), c), sizeof(c->name)); 1261 1262 c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0); 1263 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1264 1265 for (i = 0; i < SND_CHN_T_MAX; i++) 1266 c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER; 1267 1268 c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER; 1269 c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm; 1270 1271 CHN_LOCK(c); 1272 chn_vpc_reset(c, SND_VOL_C_PCM, 1); 1273 CHN_UNLOCK(c); 1274 1275 fc = feeder_getclass(NULL); 1276 if (fc == NULL) { 1277 device_printf(d->dev, "%s(): failed to get feeder class\n", 1278 __func__); 1279 goto fail; 1280 } 1281 if (feeder_add(c, fc, NULL)) { 1282 device_printf(d->dev, "%s(): failed to add feeder\n", __func__); 1283 goto fail; 1284 } 1285 1286 b = sndbuf_create(c->dev, c->name, "primary", c); 1287 bs = sndbuf_create(c->dev, c->name, "secondary", c); 1288 if (b == NULL || bs == NULL) { 1289 device_printf(d->dev, "%s(): failed to create %s buffer\n", 1290 __func__, b == NULL ? "hardware" : "software"); 1291 goto fail; 1292 } 1293 c->bufhard = b; 1294 c->bufsoft = bs; 1295 1296 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction); 1297 if (c->devinfo == NULL) { 1298 device_printf(d->dev, "%s(): CHANNEL_INIT() failed\n", __func__); 1299 goto fail; 1300 } 1301 1302 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0)) { 1303 device_printf(d->dev, "%s(): hardware buffer's size is 0\n", 1304 __func__); 1305 goto fail; 1306 } 1307 1308 sndbuf_setfmt(b, c->format); 1309 sndbuf_setspd(b, c->speed); 1310 sndbuf_setfmt(bs, c->format); 1311 sndbuf_setspd(bs, c->speed); 1312 sndbuf_setup(bs, NULL, 0); 1313 1314 /** 1315 * @todo Should this be moved somewhere else? The primary buffer 1316 * is allocated by the driver or via DMA map setup, and tmpbuf 1317 * seems to only come into existence in sndbuf_resize(). 1318 */ 1319 if (c->direction == PCMDIR_PLAY) { 1320 bs->sl = sndbuf_getmaxsize(bs); 1321 bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_WAITOK); 1322 } 1323 1324 PCM_LOCK(d); 1325 CHN_INSERT_SORT_ASCEND(d, c, channels.pcm); 1326 1327 switch (c->type) { 1328 case PCMDIR_PLAY: 1329 d->playcount++; 1330 break; 1331 case PCMDIR_PLAY_VIRTUAL: 1332 d->pvchancount++; 1333 break; 1334 case PCMDIR_REC: 1335 d->reccount++; 1336 break; 1337 case PCMDIR_REC_VIRTUAL: 1338 d->rvchancount++; 1339 break; 1340 default: 1341 __assert_unreachable(); 1342 } 1343 1344 return (c); 1345 1346 fail: 1347 free_unr(chn_getunr(d, c->type), c->unit); 1348 feeder_remove(c); 1349 if (c->devinfo && CHANNEL_FREE(c->methods, c->devinfo)) 1350 sndbuf_free(b); 1351 if (bs) 1352 sndbuf_destroy(bs); 1353 if (b) 1354 sndbuf_destroy(b); 1355 CHN_LOCK(c); 1356 chn_lockdestroy(c); 1357 1358 kobj_delete(c->methods, M_DEVBUF); 1359 free(c, M_DEVBUF); 1360 1361 PCM_LOCK(d); 1362 1363 return (NULL); 1364 } 1365 1366 void 1367 chn_kill(struct pcm_channel *c) 1368 { 1369 struct snddev_info *d = c->parentsnddev; 1370 struct snd_dbuf *b = c->bufhard; 1371 struct snd_dbuf *bs = c->bufsoft; 1372 1373 PCM_BUSYASSERT(c->parentsnddev); 1374 1375 PCM_LOCK(d); 1376 CHN_REMOVE(d, c, channels.pcm); 1377 1378 switch (c->type) { 1379 case PCMDIR_PLAY: 1380 d->playcount--; 1381 break; 1382 case PCMDIR_PLAY_VIRTUAL: 1383 d->pvchancount--; 1384 break; 1385 case PCMDIR_REC: 1386 d->reccount--; 1387 break; 1388 case PCMDIR_REC_VIRTUAL: 1389 d->rvchancount--; 1390 break; 1391 default: 1392 __assert_unreachable(); 1393 } 1394 PCM_UNLOCK(d); 1395 1396 if (CHN_STARTED(c)) { 1397 CHN_LOCK(c); 1398 chn_trigger(c, PCMTRIG_ABORT); 1399 CHN_UNLOCK(c); 1400 } 1401 free_unr(chn_getunr(c->parentsnddev, c->type), c->unit); 1402 feeder_remove(c); 1403 if (CHANNEL_FREE(c->methods, c->devinfo)) 1404 sndbuf_free(b); 1405 sndbuf_destroy(bs); 1406 sndbuf_destroy(b); 1407 CHN_LOCK(c); 1408 c->flags |= CHN_F_DEAD; 1409 chn_lockdestroy(c); 1410 kobj_delete(c->methods, M_DEVBUF); 1411 free(c, M_DEVBUF); 1412 } 1413 1414 void 1415 chn_shutdown(struct pcm_channel *c) 1416 { 1417 CHN_LOCKASSERT(c); 1418 1419 chn_wakeup(c); 1420 c->flags |= CHN_F_DEAD; 1421 } 1422 1423 /* release a locked channel and unlock it */ 1424 int 1425 chn_release(struct pcm_channel *c) 1426 { 1427 PCM_BUSYASSERT(c->parentsnddev); 1428 CHN_LOCKASSERT(c); 1429 1430 c->flags &= ~CHN_F_BUSY; 1431 c->pid = -1; 1432 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 1433 CHN_UNLOCK(c); 1434 1435 return (0); 1436 } 1437 1438 int 1439 chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right, 1440 int center) 1441 { 1442 int i, ret; 1443 1444 ret = 0; 1445 1446 for (i = 0; i < SND_CHN_T_MAX; i++) { 1447 if ((1 << i) & SND_CHN_LEFT_MASK) 1448 ret |= chn_setvolume_matrix(c, vc, i, left); 1449 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1450 ret |= chn_setvolume_matrix(c, vc, i, right) << 8; 1451 else 1452 ret |= chn_setvolume_matrix(c, vc, i, center) << 16; 1453 } 1454 1455 return (ret); 1456 } 1457 1458 int 1459 chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val) 1460 { 1461 int i; 1462 1463 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1464 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1465 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && 1466 vt <= SND_CHN_T_END)) && (vt != SND_CHN_T_VOL_0DB || 1467 (val >= SND_VOL_0DB_MIN && val <= SND_VOL_0DB_MAX)), 1468 ("%s(): invalid volume matrix c=%p vc=%d vt=%d val=%d", 1469 __func__, c, vc, vt, val)); 1470 CHN_LOCKASSERT(c); 1471 1472 if (val < 0) 1473 val = 0; 1474 if (val > 100) 1475 val = 100; 1476 1477 c->volume[vc][vt] = val; 1478 1479 /* 1480 * Do relative calculation here and store it into class + 1 1481 * to ease the job of feeder_volume. 1482 */ 1483 if (vc == SND_VOL_C_MASTER) { 1484 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1485 vc += SND_VOL_C_STEP) 1486 c->volume[SND_VOL_C_VAL(vc)][vt] = 1487 SND_VOL_CALC_VAL(c->volume, vc, vt); 1488 } else if (vc & 1) { 1489 if (vt == SND_CHN_T_VOL_0DB) 1490 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1491 i += SND_CHN_T_STEP) { 1492 c->volume[SND_VOL_C_VAL(vc)][i] = 1493 SND_VOL_CALC_VAL(c->volume, vc, i); 1494 } 1495 else 1496 c->volume[SND_VOL_C_VAL(vc)][vt] = 1497 SND_VOL_CALC_VAL(c->volume, vc, vt); 1498 } 1499 1500 return (val); 1501 } 1502 1503 int 1504 chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt) 1505 { 1506 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1507 (vt == SND_CHN_T_VOL_0DB || 1508 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1509 ("%s(): invalid volume matrix c=%p vc=%d vt=%d", 1510 __func__, c, vc, vt)); 1511 CHN_LOCKASSERT(c); 1512 1513 return (c->volume[vc][vt]); 1514 } 1515 1516 int 1517 chn_setmute_multi(struct pcm_channel *c, int vc, int mute) 1518 { 1519 int i, ret; 1520 1521 ret = 0; 1522 1523 for (i = 0; i < SND_CHN_T_MAX; i++) { 1524 if ((1 << i) & SND_CHN_LEFT_MASK) 1525 ret |= chn_setmute_matrix(c, vc, i, mute); 1526 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1527 ret |= chn_setmute_matrix(c, vc, i, mute) << 8; 1528 else 1529 ret |= chn_setmute_matrix(c, vc, i, mute) << 16; 1530 } 1531 return (ret); 1532 } 1533 1534 int 1535 chn_setmute_matrix(struct pcm_channel *c, int vc, int vt, int mute) 1536 { 1537 int i; 1538 1539 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1540 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1541 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1542 ("%s(): invalid mute matrix c=%p vc=%d vt=%d mute=%d", 1543 __func__, c, vc, vt, mute)); 1544 1545 CHN_LOCKASSERT(c); 1546 1547 mute = (mute != 0); 1548 1549 c->muted[vc][vt] = mute; 1550 1551 /* 1552 * Do relative calculation here and store it into class + 1 1553 * to ease the job of feeder_volume. 1554 */ 1555 if (vc == SND_VOL_C_MASTER) { 1556 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1557 vc += SND_VOL_C_STEP) 1558 c->muted[SND_VOL_C_VAL(vc)][vt] = mute; 1559 } else if (vc & 1) { 1560 if (vt == SND_CHN_T_VOL_0DB) { 1561 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1562 i += SND_CHN_T_STEP) { 1563 c->muted[SND_VOL_C_VAL(vc)][i] = mute; 1564 } 1565 } else { 1566 c->muted[SND_VOL_C_VAL(vc)][vt] = mute; 1567 } 1568 } 1569 return (mute); 1570 } 1571 1572 int 1573 chn_getmute_matrix(struct pcm_channel *c, int vc, int vt) 1574 { 1575 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1576 (vt == SND_CHN_T_VOL_0DB || 1577 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1578 ("%s(): invalid mute matrix c=%p vc=%d vt=%d", 1579 __func__, c, vc, vt)); 1580 CHN_LOCKASSERT(c); 1581 1582 return (c->muted[vc][vt]); 1583 } 1584 1585 struct pcmchan_matrix * 1586 chn_getmatrix(struct pcm_channel *c) 1587 { 1588 1589 KASSERT(c != NULL, ("%s(): NULL channel", __func__)); 1590 CHN_LOCKASSERT(c); 1591 1592 if (!(c->format & AFMT_CONVERTIBLE)) 1593 return (NULL); 1594 1595 return (&c->matrix); 1596 } 1597 1598 int 1599 chn_setmatrix(struct pcm_channel *c, struct pcmchan_matrix *m) 1600 { 1601 1602 KASSERT(c != NULL && m != NULL, 1603 ("%s(): NULL channel or matrix", __func__)); 1604 CHN_LOCKASSERT(c); 1605 1606 if (!(c->format & AFMT_CONVERTIBLE)) 1607 return (EINVAL); 1608 1609 c->matrix = *m; 1610 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1611 1612 return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext))); 1613 } 1614 1615 /* 1616 * XXX chn_oss_* exists for the sake of compatibility. 1617 */ 1618 int 1619 chn_oss_getorder(struct pcm_channel *c, unsigned long long *map) 1620 { 1621 1622 KASSERT(c != NULL && map != NULL, 1623 ("%s(): NULL channel or map", __func__)); 1624 CHN_LOCKASSERT(c); 1625 1626 if (!(c->format & AFMT_CONVERTIBLE)) 1627 return (EINVAL); 1628 1629 return (feeder_matrix_oss_get_channel_order(&c->matrix, map)); 1630 } 1631 1632 int 1633 chn_oss_setorder(struct pcm_channel *c, unsigned long long *map) 1634 { 1635 struct pcmchan_matrix m; 1636 int ret; 1637 1638 KASSERT(c != NULL && map != NULL, 1639 ("%s(): NULL channel or map", __func__)); 1640 CHN_LOCKASSERT(c); 1641 1642 if (!(c->format & AFMT_CONVERTIBLE)) 1643 return (EINVAL); 1644 1645 m = c->matrix; 1646 ret = feeder_matrix_oss_set_channel_order(&m, map); 1647 if (ret != 0) 1648 return (ret); 1649 1650 return (chn_setmatrix(c, &m)); 1651 } 1652 1653 #define SND_CHN_OSS_FRONT (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR) 1654 #define SND_CHN_OSS_SURR (SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR) 1655 #define SND_CHN_OSS_CENTER_LFE (SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF) 1656 #define SND_CHN_OSS_REAR (SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR) 1657 1658 int 1659 chn_oss_getmask(struct pcm_channel *c, uint32_t *retmask) 1660 { 1661 struct pcmchan_matrix *m; 1662 struct pcmchan_caps *caps; 1663 uint32_t i, format; 1664 1665 KASSERT(c != NULL && retmask != NULL, 1666 ("%s(): NULL channel or retmask", __func__)); 1667 CHN_LOCKASSERT(c); 1668 1669 caps = chn_getcaps(c); 1670 if (caps == NULL || caps->fmtlist == NULL) 1671 return (ENODEV); 1672 1673 for (i = 0; caps->fmtlist[i] != 0; i++) { 1674 format = caps->fmtlist[i]; 1675 if (!(format & AFMT_CONVERTIBLE)) { 1676 *retmask |= DSP_BIND_SPDIF; 1677 continue; 1678 } 1679 m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format); 1680 if (m == NULL) 1681 continue; 1682 if (m->mask & SND_CHN_OSS_FRONT) 1683 *retmask |= DSP_BIND_FRONT; 1684 if (m->mask & SND_CHN_OSS_SURR) 1685 *retmask |= DSP_BIND_SURR; 1686 if (m->mask & SND_CHN_OSS_CENTER_LFE) 1687 *retmask |= DSP_BIND_CENTER_LFE; 1688 if (m->mask & SND_CHN_OSS_REAR) 1689 *retmask |= DSP_BIND_REAR; 1690 } 1691 1692 /* report software-supported binding mask */ 1693 if (!CHN_BITPERFECT(c) && report_soft_matrix) 1694 *retmask |= DSP_BIND_FRONT | DSP_BIND_SURR | 1695 DSP_BIND_CENTER_LFE | DSP_BIND_REAR; 1696 1697 return (0); 1698 } 1699 1700 void 1701 chn_vpc_reset(struct pcm_channel *c, int vc, int force) 1702 { 1703 int i; 1704 1705 KASSERT(c != NULL && vc >= SND_VOL_C_BEGIN && vc <= SND_VOL_C_END, 1706 ("%s(): invalid reset c=%p vc=%d", __func__, c, vc)); 1707 CHN_LOCKASSERT(c); 1708 1709 if (force == 0 && chn_vpc_autoreset == 0) 1710 return; 1711 1712 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP) 1713 CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]); 1714 } 1715 1716 static u_int32_t 1717 round_pow2(u_int32_t v) 1718 { 1719 u_int32_t ret; 1720 1721 if (v < 2) 1722 v = 2; 1723 ret = 0; 1724 while (v >> ret) 1725 ret++; 1726 ret = 1 << (ret - 1); 1727 while (ret < v) 1728 ret <<= 1; 1729 return ret; 1730 } 1731 1732 static u_int32_t 1733 round_blksz(u_int32_t v, int round) 1734 { 1735 u_int32_t ret, tmp; 1736 1737 if (round < 1) 1738 round = 1; 1739 1740 ret = min(round_pow2(v), CHN_2NDBUFMAXSIZE >> 1); 1741 1742 if (ret > v && (ret >> 1) > 0 && (ret >> 1) >= ((v * 3) >> 2)) 1743 ret >>= 1; 1744 1745 tmp = ret - (ret % round); 1746 while (tmp < 16 || tmp < round) { 1747 ret <<= 1; 1748 tmp = ret - (ret % round); 1749 } 1750 1751 return ret; 1752 } 1753 1754 /* 1755 * 4Front call it DSP Policy, while we call it "Latency Profile". The idea 1756 * is to keep 2nd buffer short so that it doesn't cause long queue during 1757 * buffer transfer. 1758 * 1759 * Latency reference table for 48khz stereo 16bit: (PLAY) 1760 * 1761 * +---------+------------+-----------+------------+ 1762 * | Latency | Blockcount | Blocksize | Buffersize | 1763 * +---------+------------+-----------+------------+ 1764 * | 0 | 2 | 64 | 128 | 1765 * +---------+------------+-----------+------------+ 1766 * | 1 | 4 | 128 | 512 | 1767 * +---------+------------+-----------+------------+ 1768 * | 2 | 8 | 512 | 4096 | 1769 * +---------+------------+-----------+------------+ 1770 * | 3 | 16 | 512 | 8192 | 1771 * +---------+------------+-----------+------------+ 1772 * | 4 | 32 | 512 | 16384 | 1773 * +---------+------------+-----------+------------+ 1774 * | 5 | 32 | 1024 | 32768 | 1775 * +---------+------------+-----------+------------+ 1776 * | 6 | 16 | 2048 | 32768 | 1777 * +---------+------------+-----------+------------+ 1778 * | 7 | 8 | 4096 | 32768 | 1779 * +---------+------------+-----------+------------+ 1780 * | 8 | 4 | 8192 | 32768 | 1781 * +---------+------------+-----------+------------+ 1782 * | 9 | 2 | 16384 | 32768 | 1783 * +---------+------------+-----------+------------+ 1784 * | 10 | 2 | 32768 | 65536 | 1785 * +---------+------------+-----------+------------+ 1786 * 1787 * Recording need a different reference table. All we care is 1788 * gobbling up everything within reasonable buffering threshold. 1789 * 1790 * Latency reference table for 48khz stereo 16bit: (REC) 1791 * 1792 * +---------+------------+-----------+------------+ 1793 * | Latency | Blockcount | Blocksize | Buffersize | 1794 * +---------+------------+-----------+------------+ 1795 * | 0 | 512 | 32 | 16384 | 1796 * +---------+------------+-----------+------------+ 1797 * | 1 | 256 | 64 | 16384 | 1798 * +---------+------------+-----------+------------+ 1799 * | 2 | 128 | 128 | 16384 | 1800 * +---------+------------+-----------+------------+ 1801 * | 3 | 64 | 256 | 16384 | 1802 * +---------+------------+-----------+------------+ 1803 * | 4 | 32 | 512 | 16384 | 1804 * +---------+------------+-----------+------------+ 1805 * | 5 | 32 | 1024 | 32768 | 1806 * +---------+------------+-----------+------------+ 1807 * | 6 | 16 | 2048 | 32768 | 1808 * +---------+------------+-----------+------------+ 1809 * | 7 | 8 | 4096 | 32768 | 1810 * +---------+------------+-----------+------------+ 1811 * | 8 | 4 | 8192 | 32768 | 1812 * +---------+------------+-----------+------------+ 1813 * | 9 | 2 | 16384 | 32768 | 1814 * +---------+------------+-----------+------------+ 1815 * | 10 | 2 | 32768 | 65536 | 1816 * +---------+------------+-----------+------------+ 1817 * 1818 * Calculations for other data rate are entirely based on these reference 1819 * tables. For normal operation, Latency 5 seems give the best, well 1820 * balanced performance for typical workload. Anything below 5 will 1821 * eat up CPU to keep up with increasing context switches because of 1822 * shorter buffer space and usually require the application to handle it 1823 * aggressively through possibly real time programming technique. 1824 * 1825 */ 1826 #define CHN_LATENCY_PBLKCNT_REF \ 1827 {{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}, \ 1828 {1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}} 1829 #define CHN_LATENCY_PBUFSZ_REF \ 1830 {{7, 9, 12, 13, 14, 15, 15, 15, 15, 15, 16}, \ 1831 {11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 17}} 1832 1833 #define CHN_LATENCY_RBLKCNT_REF \ 1834 {{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}, \ 1835 {9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}} 1836 #define CHN_LATENCY_RBUFSZ_REF \ 1837 {{14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16}, \ 1838 {15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17}} 1839 1840 #define CHN_LATENCY_DATA_REF 192000 /* 48khz stereo 16bit ~ 48000 x 2 x 2 */ 1841 1842 static int 1843 chn_calclatency(int dir, int latency, int bps, u_int32_t datarate, 1844 u_int32_t max, int *rblksz, int *rblkcnt) 1845 { 1846 static int pblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1847 CHN_LATENCY_PBLKCNT_REF; 1848 static int pbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1849 CHN_LATENCY_PBUFSZ_REF; 1850 static int rblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1851 CHN_LATENCY_RBLKCNT_REF; 1852 static int rbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1853 CHN_LATENCY_RBUFSZ_REF; 1854 u_int32_t bufsz; 1855 int lprofile, blksz, blkcnt; 1856 1857 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX || 1858 bps < 1 || datarate < 1 || 1859 !(dir == PCMDIR_PLAY || dir == PCMDIR_REC)) { 1860 if (rblksz != NULL) 1861 *rblksz = CHN_2NDBUFMAXSIZE >> 1; 1862 if (rblkcnt != NULL) 1863 *rblkcnt = 2; 1864 printf("%s(): FAILED dir=%d latency=%d bps=%d " 1865 "datarate=%u max=%u\n", 1866 __func__, dir, latency, bps, datarate, max); 1867 return CHN_2NDBUFMAXSIZE; 1868 } 1869 1870 lprofile = chn_latency_profile; 1871 1872 if (dir == PCMDIR_PLAY) { 1873 blkcnt = pblkcnts[lprofile][latency]; 1874 bufsz = pbufszs[lprofile][latency]; 1875 } else { 1876 blkcnt = rblkcnts[lprofile][latency]; 1877 bufsz = rbufszs[lprofile][latency]; 1878 } 1879 1880 bufsz = round_pow2(snd_xbytes(1 << bufsz, CHN_LATENCY_DATA_REF, 1881 datarate)); 1882 if (bufsz > max) 1883 bufsz = max; 1884 blksz = round_blksz(bufsz >> blkcnt, bps); 1885 1886 if (rblksz != NULL) 1887 *rblksz = blksz; 1888 if (rblkcnt != NULL) 1889 *rblkcnt = 1 << blkcnt; 1890 1891 return blksz << blkcnt; 1892 } 1893 1894 static int 1895 chn_resizebuf(struct pcm_channel *c, int latency, 1896 int blkcnt, int blksz) 1897 { 1898 struct snd_dbuf *b, *bs, *pb; 1899 int sblksz, sblkcnt, hblksz, hblkcnt, limit = 0, nsblksz, nsblkcnt; 1900 int ret; 1901 1902 CHN_LOCKASSERT(c); 1903 1904 if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) || 1905 !(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC)) 1906 return EINVAL; 1907 1908 if (latency == -1) { 1909 c->latency = -1; 1910 latency = chn_latency; 1911 } else if (latency == -2) { 1912 latency = c->latency; 1913 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1914 latency = chn_latency; 1915 } else if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1916 return EINVAL; 1917 else { 1918 c->latency = latency; 1919 } 1920 1921 bs = c->bufsoft; 1922 b = c->bufhard; 1923 1924 if (!(blksz == 0 || blkcnt == -1) && 1925 (blksz < 16 || blksz < sndbuf_getalign(bs) || blkcnt < 2 || 1926 (blksz * blkcnt) > CHN_2NDBUFMAXSIZE)) 1927 return EINVAL; 1928 1929 chn_calclatency(c->direction, latency, sndbuf_getalign(bs), 1930 sndbuf_getalign(bs) * sndbuf_getspd(bs), CHN_2NDBUFMAXSIZE, 1931 &sblksz, &sblkcnt); 1932 1933 if (blksz == 0 || blkcnt == -1) { 1934 if (blkcnt == -1) 1935 c->flags &= ~CHN_F_HAS_SIZE; 1936 if (c->flags & CHN_F_HAS_SIZE) { 1937 blksz = sndbuf_getblksz(bs); 1938 blkcnt = sndbuf_getblkcnt(bs); 1939 } 1940 } else 1941 c->flags |= CHN_F_HAS_SIZE; 1942 1943 if (c->flags & CHN_F_HAS_SIZE) { 1944 /* 1945 * The application has requested their own blksz/blkcnt. 1946 * Just obey with it, and let them toast alone. We can 1947 * clamp it to the nearest latency profile, but that would 1948 * defeat the purpose of having custom control. The least 1949 * we can do is round it to the nearest ^2 and align it. 1950 */ 1951 sblksz = round_blksz(blksz, sndbuf_getalign(bs)); 1952 sblkcnt = round_pow2(blkcnt); 1953 } 1954 1955 if (c->parentchannel != NULL) { 1956 pb = c->parentchannel->bufsoft; 1957 CHN_UNLOCK(c); 1958 CHN_LOCK(c->parentchannel); 1959 chn_notify(c->parentchannel, CHN_N_BLOCKSIZE); 1960 CHN_UNLOCK(c->parentchannel); 1961 CHN_LOCK(c); 1962 if (c->direction == PCMDIR_PLAY) { 1963 limit = (pb != NULL) ? 1964 sndbuf_xbytes(sndbuf_getsize(pb), pb, bs) : 0; 1965 } else { 1966 limit = (pb != NULL) ? 1967 sndbuf_xbytes(sndbuf_getblksz(pb), pb, bs) * 2 : 0; 1968 } 1969 } else { 1970 hblkcnt = 2; 1971 if (c->flags & CHN_F_HAS_SIZE) { 1972 hblksz = round_blksz(sndbuf_xbytes(sblksz, bs, b), 1973 sndbuf_getalign(b)); 1974 hblkcnt = round_pow2(sndbuf_getblkcnt(bs)); 1975 } else 1976 chn_calclatency(c->direction, latency, 1977 sndbuf_getalign(b), 1978 sndbuf_getalign(b) * sndbuf_getspd(b), 1979 CHN_2NDBUFMAXSIZE, &hblksz, &hblkcnt); 1980 1981 if ((hblksz << 1) > sndbuf_getmaxsize(b)) 1982 hblksz = round_blksz(sndbuf_getmaxsize(b) >> 1, 1983 sndbuf_getalign(b)); 1984 1985 while ((hblksz * hblkcnt) > sndbuf_getmaxsize(b)) { 1986 if (hblkcnt < 4) 1987 hblksz >>= 1; 1988 else 1989 hblkcnt >>= 1; 1990 } 1991 1992 hblksz -= hblksz % sndbuf_getalign(b); 1993 1994 #if 0 1995 hblksz = sndbuf_getmaxsize(b) >> 1; 1996 hblksz -= hblksz % sndbuf_getalign(b); 1997 hblkcnt = 2; 1998 #endif 1999 2000 CHN_UNLOCK(c); 2001 if (chn_usefrags == 0 || 2002 CHANNEL_SETFRAGMENTS(c->methods, c->devinfo, 2003 hblksz, hblkcnt) != 0) 2004 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, 2005 c->devinfo, hblksz)); 2006 CHN_LOCK(c); 2007 2008 if (!CHN_EMPTY(c, children)) { 2009 nsblksz = round_blksz( 2010 sndbuf_xbytes(sndbuf_getblksz(b), b, bs), 2011 sndbuf_getalign(bs)); 2012 nsblkcnt = sndbuf_getblkcnt(b); 2013 if (c->direction == PCMDIR_PLAY) { 2014 do { 2015 nsblkcnt--; 2016 } while (nsblkcnt >= 2 && 2017 nsblksz * nsblkcnt >= sblksz * sblkcnt); 2018 nsblkcnt++; 2019 } 2020 sblksz = nsblksz; 2021 sblkcnt = nsblkcnt; 2022 limit = 0; 2023 } else 2024 limit = sndbuf_xbytes(sndbuf_getblksz(b), b, bs) * 2; 2025 } 2026 2027 if (limit > CHN_2NDBUFMAXSIZE) 2028 limit = CHN_2NDBUFMAXSIZE; 2029 2030 #if 0 2031 while (limit > 0 && (sblksz * sblkcnt) > limit) { 2032 if (sblkcnt < 4) 2033 break; 2034 sblkcnt >>= 1; 2035 } 2036 #endif 2037 2038 while ((sblksz * sblkcnt) < limit) 2039 sblkcnt <<= 1; 2040 2041 while ((sblksz * sblkcnt) > CHN_2NDBUFMAXSIZE) { 2042 if (sblkcnt < 4) 2043 sblksz >>= 1; 2044 else 2045 sblkcnt >>= 1; 2046 } 2047 2048 sblksz -= sblksz % sndbuf_getalign(bs); 2049 2050 if (sndbuf_getblkcnt(bs) != sblkcnt || sndbuf_getblksz(bs) != sblksz || 2051 sndbuf_getsize(bs) != (sblkcnt * sblksz)) { 2052 ret = sndbuf_remalloc(bs, sblkcnt, sblksz); 2053 if (ret != 0) { 2054 device_printf(c->dev, "%s(): Failed: %d %d\n", 2055 __func__, sblkcnt, sblksz); 2056 return ret; 2057 } 2058 } 2059 2060 /* 2061 * Interrupt timeout 2062 */ 2063 c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) / 2064 ((u_int64_t)sndbuf_getspd(bs) * sndbuf_getalign(bs)); 2065 if (c->parentchannel != NULL) 2066 c->timeout = min(c->timeout, c->parentchannel->timeout); 2067 if (c->timeout < 1) 2068 c->timeout = 1; 2069 2070 /* 2071 * OSSv4 docs: "By default OSS will set the low water level equal 2072 * to the fragment size which is optimal in most cases." 2073 */ 2074 c->lw = sndbuf_getblksz(bs); 2075 chn_resetbuf(c); 2076 2077 if (snd_verbose > 3) 2078 device_printf(c->dev, "%s(): %s (%s) timeout=%u " 2079 "b[%d/%d/%d] bs[%d/%d/%d] limit=%d\n", 2080 __func__, CHN_DIRSTR(c), 2081 (c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware", 2082 c->timeout, 2083 sndbuf_getsize(b), sndbuf_getblksz(b), 2084 sndbuf_getblkcnt(b), 2085 sndbuf_getsize(bs), sndbuf_getblksz(bs), 2086 sndbuf_getblkcnt(bs), limit); 2087 2088 return 0; 2089 } 2090 2091 int 2092 chn_setlatency(struct pcm_channel *c, int latency) 2093 { 2094 CHN_LOCKASSERT(c); 2095 /* Destroy blksz/blkcnt, enforce latency profile. */ 2096 return chn_resizebuf(c, latency, -1, 0); 2097 } 2098 2099 int 2100 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz) 2101 { 2102 CHN_LOCKASSERT(c); 2103 /* Destroy latency profile, enforce blksz/blkcnt */ 2104 return chn_resizebuf(c, -1, blkcnt, blksz); 2105 } 2106 2107 int 2108 chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed) 2109 { 2110 struct pcmchan_caps *caps; 2111 uint32_t hwspeed, delta; 2112 int ret; 2113 2114 CHN_LOCKASSERT(c); 2115 2116 if (speed < 1 || format == 0 || CHN_STARTED(c)) 2117 return (EINVAL); 2118 2119 c->format = format; 2120 c->speed = speed; 2121 2122 caps = chn_getcaps(c); 2123 2124 hwspeed = speed; 2125 RANGE(hwspeed, caps->minspeed, caps->maxspeed); 2126 2127 sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo, 2128 hwspeed)); 2129 hwspeed = sndbuf_getspd(c->bufhard); 2130 2131 delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed); 2132 2133 if (delta <= feeder_rate_round) 2134 c->speed = hwspeed; 2135 2136 ret = feeder_chain(c); 2137 2138 if (ret == 0) 2139 ret = CHANNEL_SETFORMAT(c->methods, c->devinfo, 2140 sndbuf_getfmt(c->bufhard)); 2141 2142 if (ret == 0) 2143 ret = chn_resizebuf(c, -2, 0, 0); 2144 2145 return (ret); 2146 } 2147 2148 int 2149 chn_setspeed(struct pcm_channel *c, uint32_t speed) 2150 { 2151 uint32_t oldformat, oldspeed, format; 2152 int ret; 2153 2154 #if 0 2155 /* XXX force 48k */ 2156 if (c->format & AFMT_PASSTHROUGH) 2157 speed = AFMT_PASSTHROUGH_RATE; 2158 #endif 2159 2160 oldformat = c->format; 2161 oldspeed = c->speed; 2162 format = oldformat; 2163 2164 ret = chn_setparam(c, format, speed); 2165 if (ret != 0) { 2166 if (snd_verbose > 3) 2167 device_printf(c->dev, 2168 "%s(): Setting speed %d failed, " 2169 "falling back to %d\n", 2170 __func__, speed, oldspeed); 2171 chn_setparam(c, c->format, oldspeed); 2172 } 2173 2174 return (ret); 2175 } 2176 2177 int 2178 chn_setformat(struct pcm_channel *c, uint32_t format) 2179 { 2180 uint32_t oldformat, oldspeed, speed; 2181 int ret; 2182 2183 /* XXX force stereo */ 2184 if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) { 2185 format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL, 2186 AFMT_PASSTHROUGH_EXTCHANNEL); 2187 } 2188 2189 oldformat = c->format; 2190 oldspeed = c->speed; 2191 speed = oldspeed; 2192 2193 ret = chn_setparam(c, format, speed); 2194 if (ret != 0) { 2195 if (snd_verbose > 3) 2196 device_printf(c->dev, 2197 "%s(): Format change 0x%08x failed, " 2198 "falling back to 0x%08x\n", 2199 __func__, format, oldformat); 2200 chn_setparam(c, oldformat, oldspeed); 2201 } 2202 2203 return (ret); 2204 } 2205 2206 void 2207 chn_syncstate(struct pcm_channel *c) 2208 { 2209 struct snddev_info *d; 2210 struct snd_mixer *m; 2211 2212 d = (c != NULL) ? c->parentsnddev : NULL; 2213 m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 : 2214 NULL; 2215 2216 if (d == NULL || m == NULL) 2217 return; 2218 2219 CHN_LOCKASSERT(c); 2220 2221 if (c->feederflags & (1 << FEEDER_VOLUME)) { 2222 uint32_t parent; 2223 int vol, pvol, left, right, center; 2224 2225 if (c->direction == PCMDIR_PLAY && 2226 (d->flags & SD_F_SOFTPCMVOL)) { 2227 /* CHN_UNLOCK(c); */ 2228 vol = mix_get(m, SOUND_MIXER_PCM); 2229 parent = mix_getparent(m, SOUND_MIXER_PCM); 2230 if (parent != SOUND_MIXER_NONE) 2231 pvol = mix_get(m, parent); 2232 else 2233 pvol = 100 | (100 << 8); 2234 /* CHN_LOCK(c); */ 2235 } else { 2236 vol = 100 | (100 << 8); 2237 pvol = vol; 2238 } 2239 2240 if (vol == -1) { 2241 device_printf(c->dev, 2242 "Soft PCM Volume: Failed to read pcm " 2243 "default value\n"); 2244 vol = 100 | (100 << 8); 2245 } 2246 2247 if (pvol == -1) { 2248 device_printf(c->dev, 2249 "Soft PCM Volume: Failed to read parent " 2250 "default value\n"); 2251 pvol = 100 | (100 << 8); 2252 } 2253 2254 left = ((vol & 0x7f) * (pvol & 0x7f)) / 100; 2255 right = (((vol >> 8) & 0x7f) * ((pvol >> 8) & 0x7f)) / 100; 2256 center = (left + right) >> 1; 2257 2258 chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right, center); 2259 } 2260 2261 if (c->feederflags & (1 << FEEDER_EQ)) { 2262 struct pcm_feeder *f; 2263 int treble, bass, state; 2264 2265 /* CHN_UNLOCK(c); */ 2266 treble = mix_get(m, SOUND_MIXER_TREBLE); 2267 bass = mix_get(m, SOUND_MIXER_BASS); 2268 /* CHN_LOCK(c); */ 2269 2270 if (treble == -1) 2271 treble = 50; 2272 else 2273 treble = ((treble & 0x7f) + 2274 ((treble >> 8) & 0x7f)) >> 1; 2275 2276 if (bass == -1) 2277 bass = 50; 2278 else 2279 bass = ((bass & 0x7f) + ((bass >> 8) & 0x7f)) >> 1; 2280 2281 f = feeder_find(c, FEEDER_EQ); 2282 if (f != NULL) { 2283 if (FEEDER_SET(f, FEEDEQ_TREBLE, treble) != 0) 2284 device_printf(c->dev, 2285 "EQ: Failed to set treble -- %d\n", 2286 treble); 2287 if (FEEDER_SET(f, FEEDEQ_BASS, bass) != 0) 2288 device_printf(c->dev, 2289 "EQ: Failed to set bass -- %d\n", 2290 bass); 2291 if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0) 2292 device_printf(c->dev, 2293 "EQ: Failed to set preamp -- %d\n", 2294 d->eqpreamp); 2295 if (d->flags & SD_F_EQ_BYPASSED) 2296 state = FEEDEQ_BYPASS; 2297 else if (d->flags & SD_F_EQ_ENABLED) 2298 state = FEEDEQ_ENABLE; 2299 else 2300 state = FEEDEQ_DISABLE; 2301 if (FEEDER_SET(f, FEEDEQ_STATE, state) != 0) 2302 device_printf(c->dev, 2303 "EQ: Failed to set state -- %d\n", state); 2304 } 2305 } 2306 } 2307 2308 int 2309 chn_trigger(struct pcm_channel *c, int go) 2310 { 2311 struct snddev_info *d = c->parentsnddev; 2312 int ret; 2313 2314 CHN_LOCKASSERT(c); 2315 if (!PCMTRIG_COMMON(go)) 2316 return (CHANNEL_TRIGGER(c->methods, c->devinfo, go)); 2317 2318 if (go == c->trigger) 2319 return (0); 2320 2321 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go); 2322 if (ret != 0) 2323 return (ret); 2324 2325 switch (go) { 2326 case PCMTRIG_START: 2327 if (snd_verbose > 3) 2328 device_printf(c->dev, 2329 "%s() %s: calling go=0x%08x , " 2330 "prev=0x%08x\n", __func__, c->name, go, 2331 c->trigger); 2332 if (c->trigger != PCMTRIG_START) { 2333 c->trigger = go; 2334 CHN_UNLOCK(c); 2335 PCM_LOCK(d); 2336 CHN_INSERT_HEAD(d, c, channels.pcm.busy); 2337 PCM_UNLOCK(d); 2338 CHN_LOCK(c); 2339 chn_syncstate(c); 2340 } 2341 break; 2342 case PCMTRIG_STOP: 2343 case PCMTRIG_ABORT: 2344 if (snd_verbose > 3) 2345 device_printf(c->dev, 2346 "%s() %s: calling go=0x%08x , " 2347 "prev=0x%08x\n", __func__, c->name, go, 2348 c->trigger); 2349 if (c->trigger == PCMTRIG_START) { 2350 c->trigger = go; 2351 CHN_UNLOCK(c); 2352 PCM_LOCK(d); 2353 CHN_REMOVE(d, c, channels.pcm.busy); 2354 PCM_UNLOCK(d); 2355 CHN_LOCK(c); 2356 } 2357 break; 2358 default: 2359 break; 2360 } 2361 2362 return (0); 2363 } 2364 2365 /** 2366 * @brief Queries sound driver for sample-aligned hardware buffer pointer index 2367 * 2368 * This function obtains the hardware pointer location, then aligns it to 2369 * the current bytes-per-sample value before returning. (E.g., a channel 2370 * running in 16 bit stereo mode would require 4 bytes per sample, so a 2371 * hwptr value ranging from 32-35 would be returned as 32.) 2372 * 2373 * @param c PCM channel context 2374 * @returns sample-aligned hardware buffer pointer index 2375 */ 2376 int 2377 chn_getptr(struct pcm_channel *c) 2378 { 2379 int hwptr; 2380 2381 CHN_LOCKASSERT(c); 2382 hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0; 2383 return (hwptr - (hwptr % sndbuf_getalign(c->bufhard))); 2384 } 2385 2386 struct pcmchan_caps * 2387 chn_getcaps(struct pcm_channel *c) 2388 { 2389 CHN_LOCKASSERT(c); 2390 return CHANNEL_GETCAPS(c->methods, c->devinfo); 2391 } 2392 2393 u_int32_t 2394 chn_getformats(struct pcm_channel *c) 2395 { 2396 u_int32_t *fmtlist, fmts; 2397 int i; 2398 2399 fmtlist = chn_getcaps(c)->fmtlist; 2400 fmts = 0; 2401 for (i = 0; fmtlist[i]; i++) 2402 fmts |= fmtlist[i]; 2403 2404 /* report software-supported formats */ 2405 if (!CHN_BITPERFECT(c) && report_soft_formats) 2406 fmts |= AFMT_CONVERTIBLE; 2407 2408 return (AFMT_ENCODING(fmts)); 2409 } 2410 2411 int 2412 chn_notify(struct pcm_channel *c, u_int32_t flags) 2413 { 2414 struct pcm_channel *ch; 2415 struct pcmchan_caps *caps; 2416 uint32_t bestformat, bestspeed, besthwformat, *vchanformat, *vchanrate; 2417 uint32_t vpflags; 2418 int dirty, err, run, nrun; 2419 2420 CHN_LOCKASSERT(c); 2421 2422 if (CHN_EMPTY(c, children)) 2423 return (ENODEV); 2424 2425 err = 0; 2426 2427 /* 2428 * If the hwchan is running, we can't change its rate, format or 2429 * blocksize 2430 */ 2431 run = (CHN_STARTED(c)) ? 1 : 0; 2432 if (run) 2433 flags &= CHN_N_VOLUME | CHN_N_TRIGGER; 2434 2435 if (flags & CHN_N_RATE) { 2436 /* 2437 * XXX I'll make good use of this someday. 2438 * However this is currently being superseded by 2439 * the availability of CHN_F_VCHAN_DYNAMIC. 2440 */ 2441 } 2442 2443 if (flags & CHN_N_FORMAT) { 2444 /* 2445 * XXX I'll make good use of this someday. 2446 * However this is currently being superseded by 2447 * the availability of CHN_F_VCHAN_DYNAMIC. 2448 */ 2449 } 2450 2451 if (flags & CHN_N_VOLUME) { 2452 /* 2453 * XXX I'll make good use of this someday, though 2454 * soft volume control is currently pretty much 2455 * integrated. 2456 */ 2457 } 2458 2459 if (flags & CHN_N_BLOCKSIZE) { 2460 /* 2461 * Set to default latency profile 2462 */ 2463 chn_setlatency(c, chn_latency); 2464 } 2465 2466 if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) { 2467 nrun = CHN_EMPTY(c, children.busy) ? 0 : 1; 2468 if (nrun && !run) 2469 err = chn_start(c, 1); 2470 if (!nrun && run) 2471 chn_abort(c); 2472 flags &= ~CHN_N_TRIGGER; 2473 } 2474 2475 if (flags & CHN_N_TRIGGER) { 2476 if (c->direction == PCMDIR_PLAY) { 2477 vchanformat = &c->parentsnddev->pvchanformat; 2478 vchanrate = &c->parentsnddev->pvchanrate; 2479 } else { 2480 vchanformat = &c->parentsnddev->rvchanformat; 2481 vchanrate = &c->parentsnddev->rvchanrate; 2482 } 2483 2484 /* Dynamic Virtual Channel */ 2485 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) { 2486 bestformat = *vchanformat; 2487 bestspeed = *vchanrate; 2488 } else { 2489 bestformat = 0; 2490 bestspeed = 0; 2491 } 2492 2493 besthwformat = 0; 2494 nrun = 0; 2495 caps = chn_getcaps(c); 2496 dirty = 0; 2497 vpflags = 0; 2498 2499 CHN_FOREACH(ch, c, children.busy) { 2500 CHN_LOCK(ch); 2501 if ((ch->format & AFMT_PASSTHROUGH) && 2502 snd_fmtvalid(ch->format, caps->fmtlist)) { 2503 bestformat = ch->format; 2504 bestspeed = ch->speed; 2505 CHN_UNLOCK(ch); 2506 vpflags = CHN_F_PASSTHROUGH; 2507 nrun++; 2508 break; 2509 } 2510 if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) { 2511 if (c->flags & CHN_F_VCHAN_ADAPTIVE) { 2512 bestspeed = ch->speed; 2513 RANGE(bestspeed, caps->minspeed, 2514 caps->maxspeed); 2515 besthwformat = snd_fmtbest(ch->format, 2516 caps->fmtlist); 2517 if (besthwformat != 0) 2518 bestformat = besthwformat; 2519 } 2520 CHN_UNLOCK(ch); 2521 vpflags = CHN_F_EXCLUSIVE; 2522 nrun++; 2523 continue; 2524 } 2525 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) || 2526 vpflags != 0) { 2527 CHN_UNLOCK(ch); 2528 nrun++; 2529 continue; 2530 } 2531 if (ch->speed > bestspeed) { 2532 bestspeed = ch->speed; 2533 RANGE(bestspeed, caps->minspeed, 2534 caps->maxspeed); 2535 } 2536 besthwformat = snd_fmtbest(ch->format, caps->fmtlist); 2537 if (!(besthwformat & AFMT_VCHAN)) { 2538 CHN_UNLOCK(ch); 2539 nrun++; 2540 continue; 2541 } 2542 if (AFMT_CHANNEL(besthwformat) > 2543 AFMT_CHANNEL(bestformat)) 2544 bestformat = besthwformat; 2545 else if (AFMT_CHANNEL(besthwformat) == 2546 AFMT_CHANNEL(bestformat) && 2547 AFMT_BIT(besthwformat) > AFMT_BIT(bestformat)) 2548 bestformat = besthwformat; 2549 CHN_UNLOCK(ch); 2550 nrun++; 2551 } 2552 2553 if (bestformat == 0) 2554 bestformat = c->format; 2555 if (bestspeed == 0) 2556 bestspeed = c->speed; 2557 2558 if (bestformat != c->format || bestspeed != c->speed) 2559 dirty = 1; 2560 2561 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2562 c->flags |= vpflags; 2563 2564 if (nrun && !run) { 2565 if (dirty) { 2566 bestspeed = CHANNEL_SETSPEED(c->methods, 2567 c->devinfo, bestspeed); 2568 err = chn_reset(c, bestformat, bestspeed); 2569 } 2570 if (err == 0 && dirty) { 2571 CHN_FOREACH(ch, c, children.busy) { 2572 CHN_LOCK(ch); 2573 if (VCHAN_SYNC_REQUIRED(ch)) 2574 vchan_sync(ch); 2575 CHN_UNLOCK(ch); 2576 } 2577 } 2578 if (err == 0) { 2579 if (dirty) 2580 c->flags |= CHN_F_DIRTY; 2581 err = chn_start(c, 1); 2582 } 2583 } 2584 2585 if (nrun && run && dirty) { 2586 chn_abort(c); 2587 bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo, 2588 bestspeed); 2589 err = chn_reset(c, bestformat, bestspeed); 2590 if (err == 0) { 2591 CHN_FOREACH(ch, c, children.busy) { 2592 CHN_LOCK(ch); 2593 if (VCHAN_SYNC_REQUIRED(ch)) 2594 vchan_sync(ch); 2595 CHN_UNLOCK(ch); 2596 } 2597 } 2598 if (err == 0) { 2599 c->flags |= CHN_F_DIRTY; 2600 err = chn_start(c, 1); 2601 } 2602 } 2603 2604 if (err == 0 && !(bestformat & AFMT_PASSTHROUGH) && 2605 (bestformat & AFMT_VCHAN)) { 2606 *vchanformat = bestformat; 2607 *vchanrate = bestspeed; 2608 } 2609 2610 if (!nrun && run) { 2611 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2612 bestformat = *vchanformat; 2613 bestspeed = *vchanrate; 2614 chn_abort(c); 2615 if (c->format != bestformat || c->speed != bestspeed) 2616 chn_reset(c, bestformat, bestspeed); 2617 } 2618 } 2619 2620 return (err); 2621 } 2622 2623 /** 2624 * @brief Fetch array of supported discrete sample rates 2625 * 2626 * Wrapper for CHANNEL_GETRATES. Please see channel_if.m:getrates() for 2627 * detailed information. 2628 * 2629 * @note If the operation isn't supported, this function will just return 0 2630 * (no rates in the array), and *rates will be set to NULL. Callers 2631 * should examine rates @b only if this function returns non-zero. 2632 * 2633 * @param c pcm channel to examine 2634 * @param rates pointer to array of integers; rate table will be recorded here 2635 * 2636 * @return number of rates in the array pointed to be @c rates 2637 */ 2638 int 2639 chn_getrates(struct pcm_channel *c, int **rates) 2640 { 2641 KASSERT(rates != NULL, ("rates is null")); 2642 CHN_LOCKASSERT(c); 2643 return CHANNEL_GETRATES(c->methods, c->devinfo, rates); 2644 } 2645 2646 /** 2647 * @brief Remove channel from a sync group, if there is one. 2648 * 2649 * This function is initially intended for the following conditions: 2650 * - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl) 2651 * - Closing a device. (A channel can't be destroyed if it's still in use.) 2652 * 2653 * @note Before calling this function, the syncgroup list mutex must be 2654 * held. (Consider pcm_channel::sm protected by the SG list mutex 2655 * whether @c c is locked or not.) 2656 * 2657 * @param c channel device to be started or closed 2658 * @returns If this channel was the only member of a group, the group ID 2659 * is returned to the caller so that the caller can release it 2660 * via free_unr() after giving up the syncgroup lock. Else it 2661 * returns 0. 2662 */ 2663 int 2664 chn_syncdestroy(struct pcm_channel *c) 2665 { 2666 struct pcmchan_syncmember *sm; 2667 struct pcmchan_syncgroup *sg; 2668 int sg_id; 2669 2670 sg_id = 0; 2671 2672 PCM_SG_LOCKASSERT(MA_OWNED); 2673 2674 if (c->sm != NULL) { 2675 sm = c->sm; 2676 sg = sm->parent; 2677 c->sm = NULL; 2678 2679 KASSERT(sg != NULL, ("syncmember has null parent")); 2680 2681 SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link); 2682 free(sm, M_DEVBUF); 2683 2684 if (SLIST_EMPTY(&sg->members)) { 2685 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2686 sg_id = sg->id; 2687 free(sg, M_DEVBUF); 2688 } 2689 } 2690 2691 return sg_id; 2692 } 2693 2694 #ifdef OSSV4_EXPERIMENT 2695 int 2696 chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak) 2697 { 2698 CHN_LOCKASSERT(c); 2699 return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak); 2700 } 2701 #endif 2702