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 SND_DEV_DSPHW_PLAY: 1165 return (d->p_unr); 1166 case SND_DEV_DSPHW_VPLAY: 1167 return (d->vp_unr); 1168 case SND_DEV_DSPHW_REC: 1169 return (d->r_unr); 1170 case SND_DEV_DSPHW_VREC: 1171 return (d->vr_unr); 1172 default: 1173 __assert_unreachable(); 1174 } 1175 1176 } 1177 1178 struct pcm_channel * 1179 chn_init(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, 1180 int dir, void *devinfo) 1181 { 1182 struct pcm_channel *c; 1183 struct feeder_class *fc; 1184 struct snd_dbuf *b, *bs; 1185 char buf[CHN_NAMELEN]; 1186 int i, direction, type; 1187 1188 PCM_BUSYASSERT(d); 1189 PCM_LOCKASSERT(d); 1190 1191 switch (dir) { 1192 case PCMDIR_PLAY: 1193 direction = PCMDIR_PLAY; 1194 type = SND_DEV_DSPHW_PLAY; 1195 break; 1196 case PCMDIR_PLAY_VIRTUAL: 1197 direction = PCMDIR_PLAY; 1198 type = SND_DEV_DSPHW_VPLAY; 1199 break; 1200 case PCMDIR_REC: 1201 direction = PCMDIR_REC; 1202 type = SND_DEV_DSPHW_REC; 1203 break; 1204 case PCMDIR_REC_VIRTUAL: 1205 direction = PCMDIR_REC; 1206 type = SND_DEV_DSPHW_VREC; 1207 break; 1208 default: 1209 device_printf(d->dev, 1210 "%s(): invalid channel direction: %d\n", 1211 __func__, dir); 1212 return (NULL); 1213 } 1214 1215 PCM_UNLOCK(d); 1216 b = NULL; 1217 bs = NULL; 1218 1219 c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK | M_ZERO); 1220 c->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 1221 chn_lockinit(c, dir); 1222 CHN_INIT(c, children); 1223 CHN_INIT(c, children.busy); 1224 c->direction = direction; 1225 c->type = type; 1226 c->unit = alloc_unr(chn_getunr(d, c->type)); 1227 c->format = SND_FORMAT(AFMT_U8, 1, 0); 1228 c->speed = DSP_DEFAULT_SPEED; 1229 c->pid = -1; 1230 c->latency = -1; 1231 c->timeout = 1; 1232 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 1233 c->parentsnddev = d; 1234 c->parentchannel = parent; 1235 c->dev = d->dev; 1236 c->trigger = PCMTRIG_STOP; 1237 1238 strlcpy(c->name, dsp_unit2name(buf, sizeof(buf), c), sizeof(c->name)); 1239 1240 c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0); 1241 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1242 1243 for (i = 0; i < SND_CHN_T_MAX; i++) 1244 c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER; 1245 1246 c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER; 1247 c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm; 1248 1249 CHN_LOCK(c); 1250 chn_vpc_reset(c, SND_VOL_C_PCM, 1); 1251 CHN_UNLOCK(c); 1252 1253 fc = feeder_getclass(NULL); 1254 if (fc == NULL) { 1255 device_printf(d->dev, "%s(): failed to get feeder class\n", 1256 __func__); 1257 goto fail; 1258 } 1259 if (feeder_add(c, fc, NULL)) { 1260 device_printf(d->dev, "%s(): failed to add feeder\n", __func__); 1261 goto fail; 1262 } 1263 1264 b = sndbuf_create(c->dev, c->name, "primary", c); 1265 bs = sndbuf_create(c->dev, c->name, "secondary", c); 1266 if (b == NULL || bs == NULL) { 1267 device_printf(d->dev, "%s(): failed to create %s buffer\n", 1268 __func__, b == NULL ? "hardware" : "software"); 1269 goto fail; 1270 } 1271 c->bufhard = b; 1272 c->bufsoft = bs; 1273 1274 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction); 1275 if (c->devinfo == NULL) { 1276 device_printf(d->dev, "%s(): CHANNEL_INIT() failed\n", __func__); 1277 goto fail; 1278 } 1279 1280 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0)) { 1281 device_printf(d->dev, "%s(): hardware buffer's size is 0\n", 1282 __func__); 1283 goto fail; 1284 } 1285 1286 sndbuf_setfmt(b, c->format); 1287 sndbuf_setspd(b, c->speed); 1288 sndbuf_setfmt(bs, c->format); 1289 sndbuf_setspd(bs, c->speed); 1290 sndbuf_setup(bs, NULL, 0); 1291 1292 /** 1293 * @todo Should this be moved somewhere else? The primary buffer 1294 * is allocated by the driver or via DMA map setup, and tmpbuf 1295 * seems to only come into existence in sndbuf_resize(). 1296 */ 1297 if (c->direction == PCMDIR_PLAY) { 1298 bs->sl = sndbuf_getmaxsize(bs); 1299 bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_WAITOK); 1300 } 1301 1302 PCM_LOCK(d); 1303 CHN_INSERT_SORT_ASCEND(d, c, channels.pcm); 1304 1305 switch (c->type) { 1306 case SND_DEV_DSPHW_PLAY: 1307 d->playcount++; 1308 break; 1309 case SND_DEV_DSPHW_VPLAY: 1310 d->pvchancount++; 1311 break; 1312 case SND_DEV_DSPHW_REC: 1313 d->reccount++; 1314 break; 1315 case SND_DEV_DSPHW_VREC: 1316 d->rvchancount++; 1317 break; 1318 default: 1319 __assert_unreachable(); 1320 } 1321 1322 return (c); 1323 1324 fail: 1325 free_unr(chn_getunr(d, c->type), c->unit); 1326 feeder_remove(c); 1327 if (c->devinfo && CHANNEL_FREE(c->methods, c->devinfo)) 1328 sndbuf_free(b); 1329 if (bs) 1330 sndbuf_destroy(bs); 1331 if (b) 1332 sndbuf_destroy(b); 1333 CHN_LOCK(c); 1334 chn_lockdestroy(c); 1335 1336 kobj_delete(c->methods, M_DEVBUF); 1337 free(c, M_DEVBUF); 1338 1339 PCM_LOCK(d); 1340 1341 return (NULL); 1342 } 1343 1344 void 1345 chn_kill(struct pcm_channel *c) 1346 { 1347 struct snddev_info *d = c->parentsnddev; 1348 struct snd_dbuf *b = c->bufhard; 1349 struct snd_dbuf *bs = c->bufsoft; 1350 1351 PCM_BUSYASSERT(c->parentsnddev); 1352 1353 PCM_LOCK(d); 1354 CHN_REMOVE(d, c, channels.pcm); 1355 1356 switch (c->type) { 1357 case SND_DEV_DSPHW_PLAY: 1358 d->playcount--; 1359 break; 1360 case SND_DEV_DSPHW_VPLAY: 1361 d->pvchancount--; 1362 break; 1363 case SND_DEV_DSPHW_REC: 1364 d->reccount--; 1365 break; 1366 case SND_DEV_DSPHW_VREC: 1367 d->rvchancount--; 1368 break; 1369 default: 1370 __assert_unreachable(); 1371 } 1372 PCM_UNLOCK(d); 1373 1374 if (CHN_STARTED(c)) { 1375 CHN_LOCK(c); 1376 chn_trigger(c, PCMTRIG_ABORT); 1377 CHN_UNLOCK(c); 1378 } 1379 free_unr(chn_getunr(c->parentsnddev, c->type), c->unit); 1380 feeder_remove(c); 1381 if (CHANNEL_FREE(c->methods, c->devinfo)) 1382 sndbuf_free(b); 1383 sndbuf_destroy(bs); 1384 sndbuf_destroy(b); 1385 CHN_LOCK(c); 1386 c->flags |= CHN_F_DEAD; 1387 chn_lockdestroy(c); 1388 kobj_delete(c->methods, M_DEVBUF); 1389 free(c, M_DEVBUF); 1390 } 1391 1392 void 1393 chn_shutdown(struct pcm_channel *c) 1394 { 1395 CHN_LOCKASSERT(c); 1396 1397 chn_wakeup(c); 1398 c->flags |= CHN_F_DEAD; 1399 } 1400 1401 /* release a locked channel and unlock it */ 1402 int 1403 chn_release(struct pcm_channel *c) 1404 { 1405 PCM_BUSYASSERT(c->parentsnddev); 1406 CHN_LOCKASSERT(c); 1407 1408 c->flags &= ~CHN_F_BUSY; 1409 c->pid = -1; 1410 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 1411 CHN_UNLOCK(c); 1412 1413 return (0); 1414 } 1415 1416 int 1417 chn_ref(struct pcm_channel *c, int ref) 1418 { 1419 PCM_BUSYASSERT(c->parentsnddev); 1420 CHN_LOCKASSERT(c); 1421 KASSERT((c->refcount + ref) >= 0, 1422 ("%s(): new refcount will be negative", __func__)); 1423 1424 c->refcount += ref; 1425 1426 return (c->refcount); 1427 } 1428 1429 int 1430 chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right, 1431 int center) 1432 { 1433 int i, ret; 1434 1435 ret = 0; 1436 1437 for (i = 0; i < SND_CHN_T_MAX; i++) { 1438 if ((1 << i) & SND_CHN_LEFT_MASK) 1439 ret |= chn_setvolume_matrix(c, vc, i, left); 1440 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1441 ret |= chn_setvolume_matrix(c, vc, i, right) << 8; 1442 else 1443 ret |= chn_setvolume_matrix(c, vc, i, center) << 16; 1444 } 1445 1446 return (ret); 1447 } 1448 1449 int 1450 chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val) 1451 { 1452 int i; 1453 1454 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1455 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1456 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && 1457 vt <= SND_CHN_T_END)) && (vt != SND_CHN_T_VOL_0DB || 1458 (val >= SND_VOL_0DB_MIN && val <= SND_VOL_0DB_MAX)), 1459 ("%s(): invalid volume matrix c=%p vc=%d vt=%d val=%d", 1460 __func__, c, vc, vt, val)); 1461 CHN_LOCKASSERT(c); 1462 1463 if (val < 0) 1464 val = 0; 1465 if (val > 100) 1466 val = 100; 1467 1468 c->volume[vc][vt] = val; 1469 1470 /* 1471 * Do relative calculation here and store it into class + 1 1472 * to ease the job of feeder_volume. 1473 */ 1474 if (vc == SND_VOL_C_MASTER) { 1475 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1476 vc += SND_VOL_C_STEP) 1477 c->volume[SND_VOL_C_VAL(vc)][vt] = 1478 SND_VOL_CALC_VAL(c->volume, vc, vt); 1479 } else if (vc & 1) { 1480 if (vt == SND_CHN_T_VOL_0DB) 1481 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1482 i += SND_CHN_T_STEP) { 1483 c->volume[SND_VOL_C_VAL(vc)][i] = 1484 SND_VOL_CALC_VAL(c->volume, vc, i); 1485 } 1486 else 1487 c->volume[SND_VOL_C_VAL(vc)][vt] = 1488 SND_VOL_CALC_VAL(c->volume, vc, vt); 1489 } 1490 1491 return (val); 1492 } 1493 1494 int 1495 chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt) 1496 { 1497 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1498 (vt == SND_CHN_T_VOL_0DB || 1499 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1500 ("%s(): invalid volume matrix c=%p vc=%d vt=%d", 1501 __func__, c, vc, vt)); 1502 CHN_LOCKASSERT(c); 1503 1504 return (c->volume[vc][vt]); 1505 } 1506 1507 int 1508 chn_setmute_multi(struct pcm_channel *c, int vc, int mute) 1509 { 1510 int i, ret; 1511 1512 ret = 0; 1513 1514 for (i = 0; i < SND_CHN_T_MAX; i++) { 1515 if ((1 << i) & SND_CHN_LEFT_MASK) 1516 ret |= chn_setmute_matrix(c, vc, i, mute); 1517 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1518 ret |= chn_setmute_matrix(c, vc, i, mute) << 8; 1519 else 1520 ret |= chn_setmute_matrix(c, vc, i, mute) << 16; 1521 } 1522 return (ret); 1523 } 1524 1525 int 1526 chn_setmute_matrix(struct pcm_channel *c, int vc, int vt, int mute) 1527 { 1528 int i; 1529 1530 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1531 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1532 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1533 ("%s(): invalid mute matrix c=%p vc=%d vt=%d mute=%d", 1534 __func__, c, vc, vt, mute)); 1535 1536 CHN_LOCKASSERT(c); 1537 1538 mute = (mute != 0); 1539 1540 c->muted[vc][vt] = mute; 1541 1542 /* 1543 * Do relative calculation here and store it into class + 1 1544 * to ease the job of feeder_volume. 1545 */ 1546 if (vc == SND_VOL_C_MASTER) { 1547 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1548 vc += SND_VOL_C_STEP) 1549 c->muted[SND_VOL_C_VAL(vc)][vt] = mute; 1550 } else if (vc & 1) { 1551 if (vt == SND_CHN_T_VOL_0DB) { 1552 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1553 i += SND_CHN_T_STEP) { 1554 c->muted[SND_VOL_C_VAL(vc)][i] = mute; 1555 } 1556 } else { 1557 c->muted[SND_VOL_C_VAL(vc)][vt] = mute; 1558 } 1559 } 1560 return (mute); 1561 } 1562 1563 int 1564 chn_getmute_matrix(struct pcm_channel *c, int vc, int vt) 1565 { 1566 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1567 (vt == SND_CHN_T_VOL_0DB || 1568 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1569 ("%s(): invalid mute matrix c=%p vc=%d vt=%d", 1570 __func__, c, vc, vt)); 1571 CHN_LOCKASSERT(c); 1572 1573 return (c->muted[vc][vt]); 1574 } 1575 1576 struct pcmchan_matrix * 1577 chn_getmatrix(struct pcm_channel *c) 1578 { 1579 1580 KASSERT(c != NULL, ("%s(): NULL channel", __func__)); 1581 CHN_LOCKASSERT(c); 1582 1583 if (!(c->format & AFMT_CONVERTIBLE)) 1584 return (NULL); 1585 1586 return (&c->matrix); 1587 } 1588 1589 int 1590 chn_setmatrix(struct pcm_channel *c, struct pcmchan_matrix *m) 1591 { 1592 1593 KASSERT(c != NULL && m != NULL, 1594 ("%s(): NULL channel or matrix", __func__)); 1595 CHN_LOCKASSERT(c); 1596 1597 if (!(c->format & AFMT_CONVERTIBLE)) 1598 return (EINVAL); 1599 1600 c->matrix = *m; 1601 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1602 1603 return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext))); 1604 } 1605 1606 /* 1607 * XXX chn_oss_* exists for the sake of compatibility. 1608 */ 1609 int 1610 chn_oss_getorder(struct pcm_channel *c, unsigned long long *map) 1611 { 1612 1613 KASSERT(c != NULL && map != NULL, 1614 ("%s(): NULL channel or map", __func__)); 1615 CHN_LOCKASSERT(c); 1616 1617 if (!(c->format & AFMT_CONVERTIBLE)) 1618 return (EINVAL); 1619 1620 return (feeder_matrix_oss_get_channel_order(&c->matrix, map)); 1621 } 1622 1623 int 1624 chn_oss_setorder(struct pcm_channel *c, unsigned long long *map) 1625 { 1626 struct pcmchan_matrix m; 1627 int ret; 1628 1629 KASSERT(c != NULL && map != NULL, 1630 ("%s(): NULL channel or map", __func__)); 1631 CHN_LOCKASSERT(c); 1632 1633 if (!(c->format & AFMT_CONVERTIBLE)) 1634 return (EINVAL); 1635 1636 m = c->matrix; 1637 ret = feeder_matrix_oss_set_channel_order(&m, map); 1638 if (ret != 0) 1639 return (ret); 1640 1641 return (chn_setmatrix(c, &m)); 1642 } 1643 1644 #define SND_CHN_OSS_FRONT (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR) 1645 #define SND_CHN_OSS_SURR (SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR) 1646 #define SND_CHN_OSS_CENTER_LFE (SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF) 1647 #define SND_CHN_OSS_REAR (SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR) 1648 1649 int 1650 chn_oss_getmask(struct pcm_channel *c, uint32_t *retmask) 1651 { 1652 struct pcmchan_matrix *m; 1653 struct pcmchan_caps *caps; 1654 uint32_t i, format; 1655 1656 KASSERT(c != NULL && retmask != NULL, 1657 ("%s(): NULL channel or retmask", __func__)); 1658 CHN_LOCKASSERT(c); 1659 1660 caps = chn_getcaps(c); 1661 if (caps == NULL || caps->fmtlist == NULL) 1662 return (ENODEV); 1663 1664 for (i = 0; caps->fmtlist[i] != 0; i++) { 1665 format = caps->fmtlist[i]; 1666 if (!(format & AFMT_CONVERTIBLE)) { 1667 *retmask |= DSP_BIND_SPDIF; 1668 continue; 1669 } 1670 m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format); 1671 if (m == NULL) 1672 continue; 1673 if (m->mask & SND_CHN_OSS_FRONT) 1674 *retmask |= DSP_BIND_FRONT; 1675 if (m->mask & SND_CHN_OSS_SURR) 1676 *retmask |= DSP_BIND_SURR; 1677 if (m->mask & SND_CHN_OSS_CENTER_LFE) 1678 *retmask |= DSP_BIND_CENTER_LFE; 1679 if (m->mask & SND_CHN_OSS_REAR) 1680 *retmask |= DSP_BIND_REAR; 1681 } 1682 1683 /* report software-supported binding mask */ 1684 if (!CHN_BITPERFECT(c) && report_soft_matrix) 1685 *retmask |= DSP_BIND_FRONT | DSP_BIND_SURR | 1686 DSP_BIND_CENTER_LFE | DSP_BIND_REAR; 1687 1688 return (0); 1689 } 1690 1691 void 1692 chn_vpc_reset(struct pcm_channel *c, int vc, int force) 1693 { 1694 int i; 1695 1696 KASSERT(c != NULL && vc >= SND_VOL_C_BEGIN && vc <= SND_VOL_C_END, 1697 ("%s(): invalid reset c=%p vc=%d", __func__, c, vc)); 1698 CHN_LOCKASSERT(c); 1699 1700 if (force == 0 && chn_vpc_autoreset == 0) 1701 return; 1702 1703 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP) 1704 CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]); 1705 } 1706 1707 static u_int32_t 1708 round_pow2(u_int32_t v) 1709 { 1710 u_int32_t ret; 1711 1712 if (v < 2) 1713 v = 2; 1714 ret = 0; 1715 while (v >> ret) 1716 ret++; 1717 ret = 1 << (ret - 1); 1718 while (ret < v) 1719 ret <<= 1; 1720 return ret; 1721 } 1722 1723 static u_int32_t 1724 round_blksz(u_int32_t v, int round) 1725 { 1726 u_int32_t ret, tmp; 1727 1728 if (round < 1) 1729 round = 1; 1730 1731 ret = min(round_pow2(v), CHN_2NDBUFMAXSIZE >> 1); 1732 1733 if (ret > v && (ret >> 1) > 0 && (ret >> 1) >= ((v * 3) >> 2)) 1734 ret >>= 1; 1735 1736 tmp = ret - (ret % round); 1737 while (tmp < 16 || tmp < round) { 1738 ret <<= 1; 1739 tmp = ret - (ret % round); 1740 } 1741 1742 return ret; 1743 } 1744 1745 /* 1746 * 4Front call it DSP Policy, while we call it "Latency Profile". The idea 1747 * is to keep 2nd buffer short so that it doesn't cause long queue during 1748 * buffer transfer. 1749 * 1750 * Latency reference table for 48khz stereo 16bit: (PLAY) 1751 * 1752 * +---------+------------+-----------+------------+ 1753 * | Latency | Blockcount | Blocksize | Buffersize | 1754 * +---------+------------+-----------+------------+ 1755 * | 0 | 2 | 64 | 128 | 1756 * +---------+------------+-----------+------------+ 1757 * | 1 | 4 | 128 | 512 | 1758 * +---------+------------+-----------+------------+ 1759 * | 2 | 8 | 512 | 4096 | 1760 * +---------+------------+-----------+------------+ 1761 * | 3 | 16 | 512 | 8192 | 1762 * +---------+------------+-----------+------------+ 1763 * | 4 | 32 | 512 | 16384 | 1764 * +---------+------------+-----------+------------+ 1765 * | 5 | 32 | 1024 | 32768 | 1766 * +---------+------------+-----------+------------+ 1767 * | 6 | 16 | 2048 | 32768 | 1768 * +---------+------------+-----------+------------+ 1769 * | 7 | 8 | 4096 | 32768 | 1770 * +---------+------------+-----------+------------+ 1771 * | 8 | 4 | 8192 | 32768 | 1772 * +---------+------------+-----------+------------+ 1773 * | 9 | 2 | 16384 | 32768 | 1774 * +---------+------------+-----------+------------+ 1775 * | 10 | 2 | 32768 | 65536 | 1776 * +---------+------------+-----------+------------+ 1777 * 1778 * Recording need a different reference table. All we care is 1779 * gobbling up everything within reasonable buffering threshold. 1780 * 1781 * Latency reference table for 48khz stereo 16bit: (REC) 1782 * 1783 * +---------+------------+-----------+------------+ 1784 * | Latency | Blockcount | Blocksize | Buffersize | 1785 * +---------+------------+-----------+------------+ 1786 * | 0 | 512 | 32 | 16384 | 1787 * +---------+------------+-----------+------------+ 1788 * | 1 | 256 | 64 | 16384 | 1789 * +---------+------------+-----------+------------+ 1790 * | 2 | 128 | 128 | 16384 | 1791 * +---------+------------+-----------+------------+ 1792 * | 3 | 64 | 256 | 16384 | 1793 * +---------+------------+-----------+------------+ 1794 * | 4 | 32 | 512 | 16384 | 1795 * +---------+------------+-----------+------------+ 1796 * | 5 | 32 | 1024 | 32768 | 1797 * +---------+------------+-----------+------------+ 1798 * | 6 | 16 | 2048 | 32768 | 1799 * +---------+------------+-----------+------------+ 1800 * | 7 | 8 | 4096 | 32768 | 1801 * +---------+------------+-----------+------------+ 1802 * | 8 | 4 | 8192 | 32768 | 1803 * +---------+------------+-----------+------------+ 1804 * | 9 | 2 | 16384 | 32768 | 1805 * +---------+------------+-----------+------------+ 1806 * | 10 | 2 | 32768 | 65536 | 1807 * +---------+------------+-----------+------------+ 1808 * 1809 * Calculations for other data rate are entirely based on these reference 1810 * tables. For normal operation, Latency 5 seems give the best, well 1811 * balanced performance for typical workload. Anything below 5 will 1812 * eat up CPU to keep up with increasing context switches because of 1813 * shorter buffer space and usually require the application to handle it 1814 * aggressively through possibly real time programming technique. 1815 * 1816 */ 1817 #define CHN_LATENCY_PBLKCNT_REF \ 1818 {{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}, \ 1819 {1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}} 1820 #define CHN_LATENCY_PBUFSZ_REF \ 1821 {{7, 9, 12, 13, 14, 15, 15, 15, 15, 15, 16}, \ 1822 {11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 17}} 1823 1824 #define CHN_LATENCY_RBLKCNT_REF \ 1825 {{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}, \ 1826 {9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}} 1827 #define CHN_LATENCY_RBUFSZ_REF \ 1828 {{14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16}, \ 1829 {15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17}} 1830 1831 #define CHN_LATENCY_DATA_REF 192000 /* 48khz stereo 16bit ~ 48000 x 2 x 2 */ 1832 1833 static int 1834 chn_calclatency(int dir, int latency, int bps, u_int32_t datarate, 1835 u_int32_t max, int *rblksz, int *rblkcnt) 1836 { 1837 static int pblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1838 CHN_LATENCY_PBLKCNT_REF; 1839 static int pbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1840 CHN_LATENCY_PBUFSZ_REF; 1841 static int rblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1842 CHN_LATENCY_RBLKCNT_REF; 1843 static int rbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1844 CHN_LATENCY_RBUFSZ_REF; 1845 u_int32_t bufsz; 1846 int lprofile, blksz, blkcnt; 1847 1848 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX || 1849 bps < 1 || datarate < 1 || 1850 !(dir == PCMDIR_PLAY || dir == PCMDIR_REC)) { 1851 if (rblksz != NULL) 1852 *rblksz = CHN_2NDBUFMAXSIZE >> 1; 1853 if (rblkcnt != NULL) 1854 *rblkcnt = 2; 1855 printf("%s(): FAILED dir=%d latency=%d bps=%d " 1856 "datarate=%u max=%u\n", 1857 __func__, dir, latency, bps, datarate, max); 1858 return CHN_2NDBUFMAXSIZE; 1859 } 1860 1861 lprofile = chn_latency_profile; 1862 1863 if (dir == PCMDIR_PLAY) { 1864 blkcnt = pblkcnts[lprofile][latency]; 1865 bufsz = pbufszs[lprofile][latency]; 1866 } else { 1867 blkcnt = rblkcnts[lprofile][latency]; 1868 bufsz = rbufszs[lprofile][latency]; 1869 } 1870 1871 bufsz = round_pow2(snd_xbytes(1 << bufsz, CHN_LATENCY_DATA_REF, 1872 datarate)); 1873 if (bufsz > max) 1874 bufsz = max; 1875 blksz = round_blksz(bufsz >> blkcnt, bps); 1876 1877 if (rblksz != NULL) 1878 *rblksz = blksz; 1879 if (rblkcnt != NULL) 1880 *rblkcnt = 1 << blkcnt; 1881 1882 return blksz << blkcnt; 1883 } 1884 1885 static int 1886 chn_resizebuf(struct pcm_channel *c, int latency, 1887 int blkcnt, int blksz) 1888 { 1889 struct snd_dbuf *b, *bs, *pb; 1890 int sblksz, sblkcnt, hblksz, hblkcnt, limit = 0, nsblksz, nsblkcnt; 1891 int ret; 1892 1893 CHN_LOCKASSERT(c); 1894 1895 if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) || 1896 !(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC)) 1897 return EINVAL; 1898 1899 if (latency == -1) { 1900 c->latency = -1; 1901 latency = chn_latency; 1902 } else if (latency == -2) { 1903 latency = c->latency; 1904 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1905 latency = chn_latency; 1906 } else if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1907 return EINVAL; 1908 else { 1909 c->latency = latency; 1910 } 1911 1912 bs = c->bufsoft; 1913 b = c->bufhard; 1914 1915 if (!(blksz == 0 || blkcnt == -1) && 1916 (blksz < 16 || blksz < sndbuf_getalign(bs) || blkcnt < 2 || 1917 (blksz * blkcnt) > CHN_2NDBUFMAXSIZE)) 1918 return EINVAL; 1919 1920 chn_calclatency(c->direction, latency, sndbuf_getalign(bs), 1921 sndbuf_getalign(bs) * sndbuf_getspd(bs), CHN_2NDBUFMAXSIZE, 1922 &sblksz, &sblkcnt); 1923 1924 if (blksz == 0 || blkcnt == -1) { 1925 if (blkcnt == -1) 1926 c->flags &= ~CHN_F_HAS_SIZE; 1927 if (c->flags & CHN_F_HAS_SIZE) { 1928 blksz = sndbuf_getblksz(bs); 1929 blkcnt = sndbuf_getblkcnt(bs); 1930 } 1931 } else 1932 c->flags |= CHN_F_HAS_SIZE; 1933 1934 if (c->flags & CHN_F_HAS_SIZE) { 1935 /* 1936 * The application has requested their own blksz/blkcnt. 1937 * Just obey with it, and let them toast alone. We can 1938 * clamp it to the nearest latency profile, but that would 1939 * defeat the purpose of having custom control. The least 1940 * we can do is round it to the nearest ^2 and align it. 1941 */ 1942 sblksz = round_blksz(blksz, sndbuf_getalign(bs)); 1943 sblkcnt = round_pow2(blkcnt); 1944 } 1945 1946 if (c->parentchannel != NULL) { 1947 pb = c->parentchannel->bufsoft; 1948 CHN_UNLOCK(c); 1949 CHN_LOCK(c->parentchannel); 1950 chn_notify(c->parentchannel, CHN_N_BLOCKSIZE); 1951 CHN_UNLOCK(c->parentchannel); 1952 CHN_LOCK(c); 1953 if (c->direction == PCMDIR_PLAY) { 1954 limit = (pb != NULL) ? 1955 sndbuf_xbytes(sndbuf_getsize(pb), pb, bs) : 0; 1956 } else { 1957 limit = (pb != NULL) ? 1958 sndbuf_xbytes(sndbuf_getblksz(pb), pb, bs) * 2 : 0; 1959 } 1960 } else { 1961 hblkcnt = 2; 1962 if (c->flags & CHN_F_HAS_SIZE) { 1963 hblksz = round_blksz(sndbuf_xbytes(sblksz, bs, b), 1964 sndbuf_getalign(b)); 1965 hblkcnt = round_pow2(sndbuf_getblkcnt(bs)); 1966 } else 1967 chn_calclatency(c->direction, latency, 1968 sndbuf_getalign(b), 1969 sndbuf_getalign(b) * sndbuf_getspd(b), 1970 CHN_2NDBUFMAXSIZE, &hblksz, &hblkcnt); 1971 1972 if ((hblksz << 1) > sndbuf_getmaxsize(b)) 1973 hblksz = round_blksz(sndbuf_getmaxsize(b) >> 1, 1974 sndbuf_getalign(b)); 1975 1976 while ((hblksz * hblkcnt) > sndbuf_getmaxsize(b)) { 1977 if (hblkcnt < 4) 1978 hblksz >>= 1; 1979 else 1980 hblkcnt >>= 1; 1981 } 1982 1983 hblksz -= hblksz % sndbuf_getalign(b); 1984 1985 #if 0 1986 hblksz = sndbuf_getmaxsize(b) >> 1; 1987 hblksz -= hblksz % sndbuf_getalign(b); 1988 hblkcnt = 2; 1989 #endif 1990 1991 CHN_UNLOCK(c); 1992 if (chn_usefrags == 0 || 1993 CHANNEL_SETFRAGMENTS(c->methods, c->devinfo, 1994 hblksz, hblkcnt) != 0) 1995 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, 1996 c->devinfo, hblksz)); 1997 CHN_LOCK(c); 1998 1999 if (!CHN_EMPTY(c, children)) { 2000 nsblksz = round_blksz( 2001 sndbuf_xbytes(sndbuf_getblksz(b), b, bs), 2002 sndbuf_getalign(bs)); 2003 nsblkcnt = sndbuf_getblkcnt(b); 2004 if (c->direction == PCMDIR_PLAY) { 2005 do { 2006 nsblkcnt--; 2007 } while (nsblkcnt >= 2 && 2008 nsblksz * nsblkcnt >= sblksz * sblkcnt); 2009 nsblkcnt++; 2010 } 2011 sblksz = nsblksz; 2012 sblkcnt = nsblkcnt; 2013 limit = 0; 2014 } else 2015 limit = sndbuf_xbytes(sndbuf_getblksz(b), b, bs) * 2; 2016 } 2017 2018 if (limit > CHN_2NDBUFMAXSIZE) 2019 limit = CHN_2NDBUFMAXSIZE; 2020 2021 #if 0 2022 while (limit > 0 && (sblksz * sblkcnt) > limit) { 2023 if (sblkcnt < 4) 2024 break; 2025 sblkcnt >>= 1; 2026 } 2027 #endif 2028 2029 while ((sblksz * sblkcnt) < limit) 2030 sblkcnt <<= 1; 2031 2032 while ((sblksz * sblkcnt) > CHN_2NDBUFMAXSIZE) { 2033 if (sblkcnt < 4) 2034 sblksz >>= 1; 2035 else 2036 sblkcnt >>= 1; 2037 } 2038 2039 sblksz -= sblksz % sndbuf_getalign(bs); 2040 2041 if (sndbuf_getblkcnt(bs) != sblkcnt || sndbuf_getblksz(bs) != sblksz || 2042 sndbuf_getsize(bs) != (sblkcnt * sblksz)) { 2043 ret = sndbuf_remalloc(bs, sblkcnt, sblksz); 2044 if (ret != 0) { 2045 device_printf(c->dev, "%s(): Failed: %d %d\n", 2046 __func__, sblkcnt, sblksz); 2047 return ret; 2048 } 2049 } 2050 2051 /* 2052 * Interrupt timeout 2053 */ 2054 c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) / 2055 ((u_int64_t)sndbuf_getspd(bs) * sndbuf_getalign(bs)); 2056 if (c->parentchannel != NULL) 2057 c->timeout = min(c->timeout, c->parentchannel->timeout); 2058 if (c->timeout < 1) 2059 c->timeout = 1; 2060 2061 /* 2062 * OSSv4 docs: "By default OSS will set the low water level equal 2063 * to the fragment size which is optimal in most cases." 2064 */ 2065 c->lw = sndbuf_getblksz(bs); 2066 chn_resetbuf(c); 2067 2068 if (snd_verbose > 3) 2069 device_printf(c->dev, "%s(): %s (%s) timeout=%u " 2070 "b[%d/%d/%d] bs[%d/%d/%d] limit=%d\n", 2071 __func__, CHN_DIRSTR(c), 2072 (c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware", 2073 c->timeout, 2074 sndbuf_getsize(b), sndbuf_getblksz(b), 2075 sndbuf_getblkcnt(b), 2076 sndbuf_getsize(bs), sndbuf_getblksz(bs), 2077 sndbuf_getblkcnt(bs), limit); 2078 2079 return 0; 2080 } 2081 2082 int 2083 chn_setlatency(struct pcm_channel *c, int latency) 2084 { 2085 CHN_LOCKASSERT(c); 2086 /* Destroy blksz/blkcnt, enforce latency profile. */ 2087 return chn_resizebuf(c, latency, -1, 0); 2088 } 2089 2090 int 2091 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz) 2092 { 2093 CHN_LOCKASSERT(c); 2094 /* Destroy latency profile, enforce blksz/blkcnt */ 2095 return chn_resizebuf(c, -1, blkcnt, blksz); 2096 } 2097 2098 int 2099 chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed) 2100 { 2101 struct pcmchan_caps *caps; 2102 uint32_t hwspeed, delta; 2103 int ret; 2104 2105 CHN_LOCKASSERT(c); 2106 2107 if (speed < 1 || format == 0 || CHN_STARTED(c)) 2108 return (EINVAL); 2109 2110 c->format = format; 2111 c->speed = speed; 2112 2113 caps = chn_getcaps(c); 2114 2115 hwspeed = speed; 2116 RANGE(hwspeed, caps->minspeed, caps->maxspeed); 2117 2118 sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo, 2119 hwspeed)); 2120 hwspeed = sndbuf_getspd(c->bufhard); 2121 2122 delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed); 2123 2124 if (delta <= feeder_rate_round) 2125 c->speed = hwspeed; 2126 2127 ret = feeder_chain(c); 2128 2129 if (ret == 0) 2130 ret = CHANNEL_SETFORMAT(c->methods, c->devinfo, 2131 sndbuf_getfmt(c->bufhard)); 2132 2133 if (ret == 0) 2134 ret = chn_resizebuf(c, -2, 0, 0); 2135 2136 return (ret); 2137 } 2138 2139 int 2140 chn_setspeed(struct pcm_channel *c, uint32_t speed) 2141 { 2142 uint32_t oldformat, oldspeed, format; 2143 int ret; 2144 2145 #if 0 2146 /* XXX force 48k */ 2147 if (c->format & AFMT_PASSTHROUGH) 2148 speed = AFMT_PASSTHROUGH_RATE; 2149 #endif 2150 2151 oldformat = c->format; 2152 oldspeed = c->speed; 2153 format = oldformat; 2154 2155 ret = chn_setparam(c, format, speed); 2156 if (ret != 0) { 2157 if (snd_verbose > 3) 2158 device_printf(c->dev, 2159 "%s(): Setting speed %d failed, " 2160 "falling back to %d\n", 2161 __func__, speed, oldspeed); 2162 chn_setparam(c, c->format, oldspeed); 2163 } 2164 2165 return (ret); 2166 } 2167 2168 int 2169 chn_setformat(struct pcm_channel *c, uint32_t format) 2170 { 2171 uint32_t oldformat, oldspeed, speed; 2172 int ret; 2173 2174 /* XXX force stereo */ 2175 if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) { 2176 format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL, 2177 AFMT_PASSTHROUGH_EXTCHANNEL); 2178 } 2179 2180 oldformat = c->format; 2181 oldspeed = c->speed; 2182 speed = oldspeed; 2183 2184 ret = chn_setparam(c, format, speed); 2185 if (ret != 0) { 2186 if (snd_verbose > 3) 2187 device_printf(c->dev, 2188 "%s(): Format change 0x%08x failed, " 2189 "falling back to 0x%08x\n", 2190 __func__, format, oldformat); 2191 chn_setparam(c, oldformat, oldspeed); 2192 } 2193 2194 return (ret); 2195 } 2196 2197 void 2198 chn_syncstate(struct pcm_channel *c) 2199 { 2200 struct snddev_info *d; 2201 struct snd_mixer *m; 2202 2203 d = (c != NULL) ? c->parentsnddev : NULL; 2204 m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 : 2205 NULL; 2206 2207 if (d == NULL || m == NULL) 2208 return; 2209 2210 CHN_LOCKASSERT(c); 2211 2212 if (c->feederflags & (1 << FEEDER_VOLUME)) { 2213 uint32_t parent; 2214 int vol, pvol, left, right, center; 2215 2216 if (c->direction == PCMDIR_PLAY && 2217 (d->flags & SD_F_SOFTPCMVOL)) { 2218 /* CHN_UNLOCK(c); */ 2219 vol = mix_get(m, SOUND_MIXER_PCM); 2220 parent = mix_getparent(m, SOUND_MIXER_PCM); 2221 if (parent != SOUND_MIXER_NONE) 2222 pvol = mix_get(m, parent); 2223 else 2224 pvol = 100 | (100 << 8); 2225 /* CHN_LOCK(c); */ 2226 } else { 2227 vol = 100 | (100 << 8); 2228 pvol = vol; 2229 } 2230 2231 if (vol == -1) { 2232 device_printf(c->dev, 2233 "Soft PCM Volume: Failed to read pcm " 2234 "default value\n"); 2235 vol = 100 | (100 << 8); 2236 } 2237 2238 if (pvol == -1) { 2239 device_printf(c->dev, 2240 "Soft PCM Volume: Failed to read parent " 2241 "default value\n"); 2242 pvol = 100 | (100 << 8); 2243 } 2244 2245 left = ((vol & 0x7f) * (pvol & 0x7f)) / 100; 2246 right = (((vol >> 8) & 0x7f) * ((pvol >> 8) & 0x7f)) / 100; 2247 center = (left + right) >> 1; 2248 2249 chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right, center); 2250 } 2251 2252 if (c->feederflags & (1 << FEEDER_EQ)) { 2253 struct pcm_feeder *f; 2254 int treble, bass, state; 2255 2256 /* CHN_UNLOCK(c); */ 2257 treble = mix_get(m, SOUND_MIXER_TREBLE); 2258 bass = mix_get(m, SOUND_MIXER_BASS); 2259 /* CHN_LOCK(c); */ 2260 2261 if (treble == -1) 2262 treble = 50; 2263 else 2264 treble = ((treble & 0x7f) + 2265 ((treble >> 8) & 0x7f)) >> 1; 2266 2267 if (bass == -1) 2268 bass = 50; 2269 else 2270 bass = ((bass & 0x7f) + ((bass >> 8) & 0x7f)) >> 1; 2271 2272 f = feeder_find(c, FEEDER_EQ); 2273 if (f != NULL) { 2274 if (FEEDER_SET(f, FEEDEQ_TREBLE, treble) != 0) 2275 device_printf(c->dev, 2276 "EQ: Failed to set treble -- %d\n", 2277 treble); 2278 if (FEEDER_SET(f, FEEDEQ_BASS, bass) != 0) 2279 device_printf(c->dev, 2280 "EQ: Failed to set bass -- %d\n", 2281 bass); 2282 if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0) 2283 device_printf(c->dev, 2284 "EQ: Failed to set preamp -- %d\n", 2285 d->eqpreamp); 2286 if (d->flags & SD_F_EQ_BYPASSED) 2287 state = FEEDEQ_BYPASS; 2288 else if (d->flags & SD_F_EQ_ENABLED) 2289 state = FEEDEQ_ENABLE; 2290 else 2291 state = FEEDEQ_DISABLE; 2292 if (FEEDER_SET(f, FEEDEQ_STATE, state) != 0) 2293 device_printf(c->dev, 2294 "EQ: Failed to set state -- %d\n", state); 2295 } 2296 } 2297 } 2298 2299 int 2300 chn_trigger(struct pcm_channel *c, int go) 2301 { 2302 struct snddev_info *d = c->parentsnddev; 2303 int ret; 2304 2305 CHN_LOCKASSERT(c); 2306 if (!PCMTRIG_COMMON(go)) 2307 return (CHANNEL_TRIGGER(c->methods, c->devinfo, go)); 2308 2309 if (go == c->trigger) 2310 return (0); 2311 2312 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go); 2313 if (ret != 0) 2314 return (ret); 2315 2316 switch (go) { 2317 case PCMTRIG_START: 2318 if (snd_verbose > 3) 2319 device_printf(c->dev, 2320 "%s() %s: calling go=0x%08x , " 2321 "prev=0x%08x\n", __func__, c->name, go, 2322 c->trigger); 2323 if (c->trigger != PCMTRIG_START) { 2324 c->trigger = go; 2325 CHN_UNLOCK(c); 2326 PCM_LOCK(d); 2327 CHN_INSERT_HEAD(d, c, channels.pcm.busy); 2328 PCM_UNLOCK(d); 2329 CHN_LOCK(c); 2330 chn_syncstate(c); 2331 } 2332 break; 2333 case PCMTRIG_STOP: 2334 case PCMTRIG_ABORT: 2335 if (snd_verbose > 3) 2336 device_printf(c->dev, 2337 "%s() %s: calling go=0x%08x , " 2338 "prev=0x%08x\n", __func__, c->name, go, 2339 c->trigger); 2340 if (c->trigger == PCMTRIG_START) { 2341 c->trigger = go; 2342 CHN_UNLOCK(c); 2343 PCM_LOCK(d); 2344 CHN_REMOVE(d, c, channels.pcm.busy); 2345 PCM_UNLOCK(d); 2346 CHN_LOCK(c); 2347 } 2348 break; 2349 default: 2350 break; 2351 } 2352 2353 return (0); 2354 } 2355 2356 /** 2357 * @brief Queries sound driver for sample-aligned hardware buffer pointer index 2358 * 2359 * This function obtains the hardware pointer location, then aligns it to 2360 * the current bytes-per-sample value before returning. (E.g., a channel 2361 * running in 16 bit stereo mode would require 4 bytes per sample, so a 2362 * hwptr value ranging from 32-35 would be returned as 32.) 2363 * 2364 * @param c PCM channel context 2365 * @returns sample-aligned hardware buffer pointer index 2366 */ 2367 int 2368 chn_getptr(struct pcm_channel *c) 2369 { 2370 int hwptr; 2371 2372 CHN_LOCKASSERT(c); 2373 hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0; 2374 return (hwptr - (hwptr % sndbuf_getalign(c->bufhard))); 2375 } 2376 2377 struct pcmchan_caps * 2378 chn_getcaps(struct pcm_channel *c) 2379 { 2380 CHN_LOCKASSERT(c); 2381 return CHANNEL_GETCAPS(c->methods, c->devinfo); 2382 } 2383 2384 u_int32_t 2385 chn_getformats(struct pcm_channel *c) 2386 { 2387 u_int32_t *fmtlist, fmts; 2388 int i; 2389 2390 fmtlist = chn_getcaps(c)->fmtlist; 2391 fmts = 0; 2392 for (i = 0; fmtlist[i]; i++) 2393 fmts |= fmtlist[i]; 2394 2395 /* report software-supported formats */ 2396 if (!CHN_BITPERFECT(c) && report_soft_formats) 2397 fmts |= AFMT_CONVERTIBLE; 2398 2399 return (AFMT_ENCODING(fmts)); 2400 } 2401 2402 int 2403 chn_notify(struct pcm_channel *c, u_int32_t flags) 2404 { 2405 struct pcm_channel *ch; 2406 struct pcmchan_caps *caps; 2407 uint32_t bestformat, bestspeed, besthwformat, *vchanformat, *vchanrate; 2408 uint32_t vpflags; 2409 int dirty, err, run, nrun; 2410 2411 CHN_LOCKASSERT(c); 2412 2413 if (CHN_EMPTY(c, children)) 2414 return (ENODEV); 2415 2416 err = 0; 2417 2418 /* 2419 * If the hwchan is running, we can't change its rate, format or 2420 * blocksize 2421 */ 2422 run = (CHN_STARTED(c)) ? 1 : 0; 2423 if (run) 2424 flags &= CHN_N_VOLUME | CHN_N_TRIGGER; 2425 2426 if (flags & CHN_N_RATE) { 2427 /* 2428 * XXX I'll make good use of this someday. 2429 * However this is currently being superseded by 2430 * the availability of CHN_F_VCHAN_DYNAMIC. 2431 */ 2432 } 2433 2434 if (flags & CHN_N_FORMAT) { 2435 /* 2436 * XXX I'll make good use of this someday. 2437 * However this is currently being superseded by 2438 * the availability of CHN_F_VCHAN_DYNAMIC. 2439 */ 2440 } 2441 2442 if (flags & CHN_N_VOLUME) { 2443 /* 2444 * XXX I'll make good use of this someday, though 2445 * soft volume control is currently pretty much 2446 * integrated. 2447 */ 2448 } 2449 2450 if (flags & CHN_N_BLOCKSIZE) { 2451 /* 2452 * Set to default latency profile 2453 */ 2454 chn_setlatency(c, chn_latency); 2455 } 2456 2457 if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) { 2458 nrun = CHN_EMPTY(c, children.busy) ? 0 : 1; 2459 if (nrun && !run) 2460 err = chn_start(c, 1); 2461 if (!nrun && run) 2462 chn_abort(c); 2463 flags &= ~CHN_N_TRIGGER; 2464 } 2465 2466 if (flags & CHN_N_TRIGGER) { 2467 if (c->direction == PCMDIR_PLAY) { 2468 vchanformat = &c->parentsnddev->pvchanformat; 2469 vchanrate = &c->parentsnddev->pvchanrate; 2470 } else { 2471 vchanformat = &c->parentsnddev->rvchanformat; 2472 vchanrate = &c->parentsnddev->rvchanrate; 2473 } 2474 2475 /* Dynamic Virtual Channel */ 2476 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) { 2477 bestformat = *vchanformat; 2478 bestspeed = *vchanrate; 2479 } else { 2480 bestformat = 0; 2481 bestspeed = 0; 2482 } 2483 2484 besthwformat = 0; 2485 nrun = 0; 2486 caps = chn_getcaps(c); 2487 dirty = 0; 2488 vpflags = 0; 2489 2490 CHN_FOREACH(ch, c, children.busy) { 2491 CHN_LOCK(ch); 2492 if ((ch->format & AFMT_PASSTHROUGH) && 2493 snd_fmtvalid(ch->format, caps->fmtlist)) { 2494 bestformat = ch->format; 2495 bestspeed = ch->speed; 2496 CHN_UNLOCK(ch); 2497 vpflags = CHN_F_PASSTHROUGH; 2498 nrun++; 2499 break; 2500 } 2501 if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) { 2502 if (c->flags & CHN_F_VCHAN_ADAPTIVE) { 2503 bestspeed = ch->speed; 2504 RANGE(bestspeed, caps->minspeed, 2505 caps->maxspeed); 2506 besthwformat = snd_fmtbest(ch->format, 2507 caps->fmtlist); 2508 if (besthwformat != 0) 2509 bestformat = besthwformat; 2510 } 2511 CHN_UNLOCK(ch); 2512 vpflags = CHN_F_EXCLUSIVE; 2513 nrun++; 2514 continue; 2515 } 2516 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) || 2517 vpflags != 0) { 2518 CHN_UNLOCK(ch); 2519 nrun++; 2520 continue; 2521 } 2522 if (ch->speed > bestspeed) { 2523 bestspeed = ch->speed; 2524 RANGE(bestspeed, caps->minspeed, 2525 caps->maxspeed); 2526 } 2527 besthwformat = snd_fmtbest(ch->format, caps->fmtlist); 2528 if (!(besthwformat & AFMT_VCHAN)) { 2529 CHN_UNLOCK(ch); 2530 nrun++; 2531 continue; 2532 } 2533 if (AFMT_CHANNEL(besthwformat) > 2534 AFMT_CHANNEL(bestformat)) 2535 bestformat = besthwformat; 2536 else if (AFMT_CHANNEL(besthwformat) == 2537 AFMT_CHANNEL(bestformat) && 2538 AFMT_BIT(besthwformat) > AFMT_BIT(bestformat)) 2539 bestformat = besthwformat; 2540 CHN_UNLOCK(ch); 2541 nrun++; 2542 } 2543 2544 if (bestformat == 0) 2545 bestformat = c->format; 2546 if (bestspeed == 0) 2547 bestspeed = c->speed; 2548 2549 if (bestformat != c->format || bestspeed != c->speed) 2550 dirty = 1; 2551 2552 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2553 c->flags |= vpflags; 2554 2555 if (nrun && !run) { 2556 if (dirty) { 2557 bestspeed = CHANNEL_SETSPEED(c->methods, 2558 c->devinfo, bestspeed); 2559 err = chn_reset(c, bestformat, bestspeed); 2560 } 2561 if (err == 0 && dirty) { 2562 CHN_FOREACH(ch, c, children.busy) { 2563 CHN_LOCK(ch); 2564 if (VCHAN_SYNC_REQUIRED(ch)) 2565 vchan_sync(ch); 2566 CHN_UNLOCK(ch); 2567 } 2568 } 2569 if (err == 0) { 2570 if (dirty) 2571 c->flags |= CHN_F_DIRTY; 2572 err = chn_start(c, 1); 2573 } 2574 } 2575 2576 if (nrun && run && dirty) { 2577 chn_abort(c); 2578 bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo, 2579 bestspeed); 2580 err = chn_reset(c, bestformat, bestspeed); 2581 if (err == 0) { 2582 CHN_FOREACH(ch, c, children.busy) { 2583 CHN_LOCK(ch); 2584 if (VCHAN_SYNC_REQUIRED(ch)) 2585 vchan_sync(ch); 2586 CHN_UNLOCK(ch); 2587 } 2588 } 2589 if (err == 0) { 2590 c->flags |= CHN_F_DIRTY; 2591 err = chn_start(c, 1); 2592 } 2593 } 2594 2595 if (err == 0 && !(bestformat & AFMT_PASSTHROUGH) && 2596 (bestformat & AFMT_VCHAN)) { 2597 *vchanformat = bestformat; 2598 *vchanrate = bestspeed; 2599 } 2600 2601 if (!nrun && run) { 2602 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2603 bestformat = *vchanformat; 2604 bestspeed = *vchanrate; 2605 chn_abort(c); 2606 if (c->format != bestformat || c->speed != bestspeed) 2607 chn_reset(c, bestformat, bestspeed); 2608 } 2609 } 2610 2611 return (err); 2612 } 2613 2614 /** 2615 * @brief Fetch array of supported discrete sample rates 2616 * 2617 * Wrapper for CHANNEL_GETRATES. Please see channel_if.m:getrates() for 2618 * detailed information. 2619 * 2620 * @note If the operation isn't supported, this function will just return 0 2621 * (no rates in the array), and *rates will be set to NULL. Callers 2622 * should examine rates @b only if this function returns non-zero. 2623 * 2624 * @param c pcm channel to examine 2625 * @param rates pointer to array of integers; rate table will be recorded here 2626 * 2627 * @return number of rates in the array pointed to be @c rates 2628 */ 2629 int 2630 chn_getrates(struct pcm_channel *c, int **rates) 2631 { 2632 KASSERT(rates != NULL, ("rates is null")); 2633 CHN_LOCKASSERT(c); 2634 return CHANNEL_GETRATES(c->methods, c->devinfo, rates); 2635 } 2636 2637 /** 2638 * @brief Remove channel from a sync group, if there is one. 2639 * 2640 * This function is initially intended for the following conditions: 2641 * - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl) 2642 * - Closing a device. (A channel can't be destroyed if it's still in use.) 2643 * 2644 * @note Before calling this function, the syncgroup list mutex must be 2645 * held. (Consider pcm_channel::sm protected by the SG list mutex 2646 * whether @c c is locked or not.) 2647 * 2648 * @param c channel device to be started or closed 2649 * @returns If this channel was the only member of a group, the group ID 2650 * is returned to the caller so that the caller can release it 2651 * via free_unr() after giving up the syncgroup lock. Else it 2652 * returns 0. 2653 */ 2654 int 2655 chn_syncdestroy(struct pcm_channel *c) 2656 { 2657 struct pcmchan_syncmember *sm; 2658 struct pcmchan_syncgroup *sg; 2659 int sg_id; 2660 2661 sg_id = 0; 2662 2663 PCM_SG_LOCKASSERT(MA_OWNED); 2664 2665 if (c->sm != NULL) { 2666 sm = c->sm; 2667 sg = sm->parent; 2668 c->sm = NULL; 2669 2670 KASSERT(sg != NULL, ("syncmember has null parent")); 2671 2672 SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link); 2673 free(sm, M_DEVBUF); 2674 2675 if (SLIST_EMPTY(&sg->members)) { 2676 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2677 sg_id = sg->id; 2678 free(sg, M_DEVBUF); 2679 } 2680 } 2681 2682 return sg_id; 2683 } 2684 2685 #ifdef OSSV4_EXPERIMENT 2686 int 2687 chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak) 2688 { 2689 CHN_LOCKASSERT(c); 2690 return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak); 2691 } 2692 #endif 2693