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 struct pcm_channel * 1161 chn_init(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, 1162 int dir, void *devinfo) 1163 { 1164 struct pcm_channel *c; 1165 struct feeder_class *fc; 1166 struct snd_dbuf *b, *bs; 1167 char *dirs, buf[CHN_NAMELEN]; 1168 int i, direction, *pnum, max, type, unit; 1169 1170 PCM_BUSYASSERT(d); 1171 PCM_LOCKASSERT(d); 1172 1173 switch (dir) { 1174 case PCMDIR_PLAY: 1175 dirs = "play"; 1176 direction = PCMDIR_PLAY; 1177 pnum = &d->playcount; 1178 type = SND_DEV_DSPHW_PLAY; 1179 max = SND_MAXHWCHAN; 1180 break; 1181 case PCMDIR_PLAY_VIRTUAL: 1182 dirs = "virtual_play"; 1183 direction = PCMDIR_PLAY; 1184 pnum = &d->pvchancount; 1185 type = SND_DEV_DSPHW_VPLAY; 1186 max = SND_MAXVCHANS; 1187 break; 1188 case PCMDIR_REC: 1189 dirs = "record"; 1190 direction = PCMDIR_REC; 1191 pnum = &d->reccount; 1192 type = SND_DEV_DSPHW_REC; 1193 max = SND_MAXHWCHAN; 1194 break; 1195 case PCMDIR_REC_VIRTUAL: 1196 dirs = "virtual_record"; 1197 direction = PCMDIR_REC; 1198 pnum = &d->rvchancount; 1199 type = SND_DEV_DSPHW_VREC; 1200 max = SND_MAXVCHANS; 1201 break; 1202 default: 1203 device_printf(d->dev, 1204 "%s(): invalid channel direction: %d\n", 1205 __func__, dir); 1206 return (NULL); 1207 } 1208 1209 if (*pnum >= max) { 1210 device_printf(d->dev, "%s(): cannot allocate more channels " 1211 "(max=%d)\n", __func__, max); 1212 return (NULL); 1213 } 1214 1215 unit = 0; 1216 CHN_FOREACH(c, d, channels.pcm) { 1217 if (c->type != type) 1218 continue; 1219 unit++; 1220 if (unit >= max) { 1221 device_printf(d->dev, "%s(): cannot allocate more " 1222 "channels for type=%d (max=%d)\n", 1223 __func__, type, max); 1224 return (NULL); 1225 } 1226 } 1227 1228 PCM_UNLOCK(d); 1229 b = NULL; 1230 bs = NULL; 1231 1232 c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK | M_ZERO); 1233 c->methods = kobj_create(cls, M_DEVBUF, M_WAITOK | M_ZERO); 1234 chn_lockinit(c, dir); 1235 CHN_INIT(c, children); 1236 CHN_INIT(c, children.busy); 1237 c->direction = direction; 1238 c->type = type; 1239 c->unit = unit; 1240 c->format = SND_FORMAT(AFMT_U8, 1, 0); 1241 c->speed = DSP_DEFAULT_SPEED; 1242 c->pid = -1; 1243 c->latency = -1; 1244 c->timeout = 1; 1245 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 1246 c->parentsnddev = d; 1247 c->parentchannel = parent; 1248 c->dev = d->dev; 1249 c->trigger = PCMTRIG_STOP; 1250 1251 snprintf(c->name, sizeof(c->name), "%s:%s:%s", 1252 device_get_nameunit(c->dev), dirs, 1253 dsp_unit2name(buf, sizeof(buf), c)); 1254 1255 c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0); 1256 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1257 1258 for (i = 0; i < SND_CHN_T_MAX; i++) 1259 c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER; 1260 1261 c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER; 1262 c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm; 1263 1264 CHN_LOCK(c); 1265 chn_vpc_reset(c, SND_VOL_C_PCM, 1); 1266 CHN_UNLOCK(c); 1267 1268 fc = feeder_getclass(NULL); 1269 if (fc == NULL) { 1270 device_printf(d->dev, "%s(): failed to get feeder class\n", 1271 __func__); 1272 goto fail; 1273 } 1274 if (feeder_add(c, fc, NULL)) { 1275 device_printf(d->dev, "%s(): failed to add feeder\n", __func__); 1276 goto fail; 1277 } 1278 1279 b = sndbuf_create(c->dev, c->name, "primary", c); 1280 bs = sndbuf_create(c->dev, c->name, "secondary", c); 1281 if (b == NULL || bs == NULL) { 1282 device_printf(d->dev, "%s(): failed to create %s buffer\n", 1283 __func__, b == NULL ? "hardware" : "software"); 1284 goto fail; 1285 } 1286 c->bufhard = b; 1287 c->bufsoft = bs; 1288 1289 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction); 1290 if (c->devinfo == NULL) { 1291 device_printf(d->dev, "%s(): CHANNEL_INIT() failed\n", __func__); 1292 goto fail; 1293 } 1294 1295 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0)) { 1296 device_printf(d->dev, "%s(): hardware buffer's size is 0\n", 1297 __func__); 1298 goto fail; 1299 } 1300 1301 sndbuf_setfmt(b, c->format); 1302 sndbuf_setspd(b, c->speed); 1303 sndbuf_setfmt(bs, c->format); 1304 sndbuf_setspd(bs, c->speed); 1305 sndbuf_setup(bs, NULL, 0); 1306 1307 /** 1308 * @todo Should this be moved somewhere else? The primary buffer 1309 * is allocated by the driver or via DMA map setup, and tmpbuf 1310 * seems to only come into existence in sndbuf_resize(). 1311 */ 1312 if (c->direction == PCMDIR_PLAY) { 1313 bs->sl = sndbuf_getmaxsize(bs); 1314 bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_NOWAIT); 1315 if (bs->shadbuf == NULL) { 1316 device_printf(d->dev, "%s(): failed to create shadow " 1317 "buffer\n", __func__); 1318 goto fail; 1319 } 1320 } 1321 1322 PCM_LOCK(d); 1323 1324 return (c); 1325 1326 fail: 1327 feeder_remove(c); 1328 if (c->devinfo && CHANNEL_FREE(c->methods, c->devinfo)) 1329 sndbuf_free(b); 1330 if (bs) 1331 sndbuf_destroy(bs); 1332 if (b) 1333 sndbuf_destroy(b); 1334 CHN_LOCK(c); 1335 chn_lockdestroy(c); 1336 1337 kobj_delete(c->methods, M_DEVBUF); 1338 free(c, M_DEVBUF); 1339 1340 PCM_LOCK(d); 1341 1342 return (NULL); 1343 } 1344 1345 void 1346 chn_kill(struct pcm_channel *c) 1347 { 1348 struct snd_dbuf *b = c->bufhard; 1349 struct snd_dbuf *bs = c->bufsoft; 1350 1351 PCM_BUSYASSERT(c->parentsnddev); 1352 1353 if (CHN_STARTED(c)) { 1354 CHN_LOCK(c); 1355 chn_trigger(c, PCMTRIG_ABORT); 1356 CHN_UNLOCK(c); 1357 } 1358 feeder_remove(c); 1359 if (CHANNEL_FREE(c->methods, c->devinfo)) 1360 sndbuf_free(b); 1361 sndbuf_destroy(bs); 1362 sndbuf_destroy(b); 1363 CHN_LOCK(c); 1364 c->flags |= CHN_F_DEAD; 1365 chn_lockdestroy(c); 1366 kobj_delete(c->methods, M_DEVBUF); 1367 free(c, M_DEVBUF); 1368 } 1369 1370 void 1371 chn_shutdown(struct pcm_channel *c) 1372 { 1373 CHN_LOCKASSERT(c); 1374 1375 chn_wakeup(c); 1376 c->flags |= CHN_F_DEAD; 1377 } 1378 1379 /* release a locked channel and unlock it */ 1380 int 1381 chn_release(struct pcm_channel *c) 1382 { 1383 PCM_BUSYASSERT(c->parentsnddev); 1384 CHN_LOCKASSERT(c); 1385 1386 c->flags &= ~CHN_F_BUSY; 1387 c->pid = -1; 1388 strlcpy(c->comm, CHN_COMM_UNUSED, sizeof(c->comm)); 1389 CHN_UNLOCK(c); 1390 1391 return (0); 1392 } 1393 1394 int 1395 chn_ref(struct pcm_channel *c, int ref) 1396 { 1397 PCM_BUSYASSERT(c->parentsnddev); 1398 CHN_LOCKASSERT(c); 1399 KASSERT((c->refcount + ref) >= 0, 1400 ("%s(): new refcount will be negative", __func__)); 1401 1402 c->refcount += ref; 1403 1404 return (c->refcount); 1405 } 1406 1407 int 1408 chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right, 1409 int center) 1410 { 1411 int i, ret; 1412 1413 ret = 0; 1414 1415 for (i = 0; i < SND_CHN_T_MAX; i++) { 1416 if ((1 << i) & SND_CHN_LEFT_MASK) 1417 ret |= chn_setvolume_matrix(c, vc, i, left); 1418 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1419 ret |= chn_setvolume_matrix(c, vc, i, right) << 8; 1420 else 1421 ret |= chn_setvolume_matrix(c, vc, i, center) << 16; 1422 } 1423 1424 return (ret); 1425 } 1426 1427 int 1428 chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val) 1429 { 1430 int i; 1431 1432 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1433 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1434 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && 1435 vt <= SND_CHN_T_END)) && (vt != SND_CHN_T_VOL_0DB || 1436 (val >= SND_VOL_0DB_MIN && val <= SND_VOL_0DB_MAX)), 1437 ("%s(): invalid volume matrix c=%p vc=%d vt=%d val=%d", 1438 __func__, c, vc, vt, val)); 1439 CHN_LOCKASSERT(c); 1440 1441 if (val < 0) 1442 val = 0; 1443 if (val > 100) 1444 val = 100; 1445 1446 c->volume[vc][vt] = val; 1447 1448 /* 1449 * Do relative calculation here and store it into class + 1 1450 * to ease the job of feeder_volume. 1451 */ 1452 if (vc == SND_VOL_C_MASTER) { 1453 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1454 vc += SND_VOL_C_STEP) 1455 c->volume[SND_VOL_C_VAL(vc)][vt] = 1456 SND_VOL_CALC_VAL(c->volume, vc, vt); 1457 } else if (vc & 1) { 1458 if (vt == SND_CHN_T_VOL_0DB) 1459 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1460 i += SND_CHN_T_STEP) { 1461 c->volume[SND_VOL_C_VAL(vc)][i] = 1462 SND_VOL_CALC_VAL(c->volume, vc, i); 1463 } 1464 else 1465 c->volume[SND_VOL_C_VAL(vc)][vt] = 1466 SND_VOL_CALC_VAL(c->volume, vc, vt); 1467 } 1468 1469 return (val); 1470 } 1471 1472 int 1473 chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt) 1474 { 1475 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1476 (vt == SND_CHN_T_VOL_0DB || 1477 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1478 ("%s(): invalid volume matrix c=%p vc=%d vt=%d", 1479 __func__, c, vc, vt)); 1480 CHN_LOCKASSERT(c); 1481 1482 return (c->volume[vc][vt]); 1483 } 1484 1485 int 1486 chn_setmute_multi(struct pcm_channel *c, int vc, int mute) 1487 { 1488 int i, ret; 1489 1490 ret = 0; 1491 1492 for (i = 0; i < SND_CHN_T_MAX; i++) { 1493 if ((1 << i) & SND_CHN_LEFT_MASK) 1494 ret |= chn_setmute_matrix(c, vc, i, mute); 1495 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1496 ret |= chn_setmute_matrix(c, vc, i, mute) << 8; 1497 else 1498 ret |= chn_setmute_matrix(c, vc, i, mute) << 16; 1499 } 1500 return (ret); 1501 } 1502 1503 int 1504 chn_setmute_matrix(struct pcm_channel *c, int vc, int vt, int mute) 1505 { 1506 int i; 1507 1508 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1509 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1510 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1511 ("%s(): invalid mute matrix c=%p vc=%d vt=%d mute=%d", 1512 __func__, c, vc, vt, mute)); 1513 1514 CHN_LOCKASSERT(c); 1515 1516 mute = (mute != 0); 1517 1518 c->muted[vc][vt] = mute; 1519 1520 /* 1521 * Do relative calculation here and store it into class + 1 1522 * to ease the job of feeder_volume. 1523 */ 1524 if (vc == SND_VOL_C_MASTER) { 1525 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1526 vc += SND_VOL_C_STEP) 1527 c->muted[SND_VOL_C_VAL(vc)][vt] = mute; 1528 } else if (vc & 1) { 1529 if (vt == SND_CHN_T_VOL_0DB) { 1530 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1531 i += SND_CHN_T_STEP) { 1532 c->muted[SND_VOL_C_VAL(vc)][i] = mute; 1533 } 1534 } else { 1535 c->muted[SND_VOL_C_VAL(vc)][vt] = mute; 1536 } 1537 } 1538 return (mute); 1539 } 1540 1541 int 1542 chn_getmute_matrix(struct pcm_channel *c, int vc, int vt) 1543 { 1544 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1545 (vt == SND_CHN_T_VOL_0DB || 1546 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1547 ("%s(): invalid mute matrix c=%p vc=%d vt=%d", 1548 __func__, c, vc, vt)); 1549 CHN_LOCKASSERT(c); 1550 1551 return (c->muted[vc][vt]); 1552 } 1553 1554 struct pcmchan_matrix * 1555 chn_getmatrix(struct pcm_channel *c) 1556 { 1557 1558 KASSERT(c != NULL, ("%s(): NULL channel", __func__)); 1559 CHN_LOCKASSERT(c); 1560 1561 if (!(c->format & AFMT_CONVERTIBLE)) 1562 return (NULL); 1563 1564 return (&c->matrix); 1565 } 1566 1567 int 1568 chn_setmatrix(struct pcm_channel *c, struct pcmchan_matrix *m) 1569 { 1570 1571 KASSERT(c != NULL && m != NULL, 1572 ("%s(): NULL channel or matrix", __func__)); 1573 CHN_LOCKASSERT(c); 1574 1575 if (!(c->format & AFMT_CONVERTIBLE)) 1576 return (EINVAL); 1577 1578 c->matrix = *m; 1579 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1580 1581 return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext))); 1582 } 1583 1584 /* 1585 * XXX chn_oss_* exists for the sake of compatibility. 1586 */ 1587 int 1588 chn_oss_getorder(struct pcm_channel *c, unsigned long long *map) 1589 { 1590 1591 KASSERT(c != NULL && map != NULL, 1592 ("%s(): NULL channel or map", __func__)); 1593 CHN_LOCKASSERT(c); 1594 1595 if (!(c->format & AFMT_CONVERTIBLE)) 1596 return (EINVAL); 1597 1598 return (feeder_matrix_oss_get_channel_order(&c->matrix, map)); 1599 } 1600 1601 int 1602 chn_oss_setorder(struct pcm_channel *c, unsigned long long *map) 1603 { 1604 struct pcmchan_matrix m; 1605 int ret; 1606 1607 KASSERT(c != NULL && map != NULL, 1608 ("%s(): NULL channel or map", __func__)); 1609 CHN_LOCKASSERT(c); 1610 1611 if (!(c->format & AFMT_CONVERTIBLE)) 1612 return (EINVAL); 1613 1614 m = c->matrix; 1615 ret = feeder_matrix_oss_set_channel_order(&m, map); 1616 if (ret != 0) 1617 return (ret); 1618 1619 return (chn_setmatrix(c, &m)); 1620 } 1621 1622 #define SND_CHN_OSS_FRONT (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR) 1623 #define SND_CHN_OSS_SURR (SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR) 1624 #define SND_CHN_OSS_CENTER_LFE (SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF) 1625 #define SND_CHN_OSS_REAR (SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR) 1626 1627 int 1628 chn_oss_getmask(struct pcm_channel *c, uint32_t *retmask) 1629 { 1630 struct pcmchan_matrix *m; 1631 struct pcmchan_caps *caps; 1632 uint32_t i, format; 1633 1634 KASSERT(c != NULL && retmask != NULL, 1635 ("%s(): NULL channel or retmask", __func__)); 1636 CHN_LOCKASSERT(c); 1637 1638 caps = chn_getcaps(c); 1639 if (caps == NULL || caps->fmtlist == NULL) 1640 return (ENODEV); 1641 1642 for (i = 0; caps->fmtlist[i] != 0; i++) { 1643 format = caps->fmtlist[i]; 1644 if (!(format & AFMT_CONVERTIBLE)) { 1645 *retmask |= DSP_BIND_SPDIF; 1646 continue; 1647 } 1648 m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format); 1649 if (m == NULL) 1650 continue; 1651 if (m->mask & SND_CHN_OSS_FRONT) 1652 *retmask |= DSP_BIND_FRONT; 1653 if (m->mask & SND_CHN_OSS_SURR) 1654 *retmask |= DSP_BIND_SURR; 1655 if (m->mask & SND_CHN_OSS_CENTER_LFE) 1656 *retmask |= DSP_BIND_CENTER_LFE; 1657 if (m->mask & SND_CHN_OSS_REAR) 1658 *retmask |= DSP_BIND_REAR; 1659 } 1660 1661 /* report software-supported binding mask */ 1662 if (!CHN_BITPERFECT(c) && report_soft_matrix) 1663 *retmask |= DSP_BIND_FRONT | DSP_BIND_SURR | 1664 DSP_BIND_CENTER_LFE | DSP_BIND_REAR; 1665 1666 return (0); 1667 } 1668 1669 void 1670 chn_vpc_reset(struct pcm_channel *c, int vc, int force) 1671 { 1672 int i; 1673 1674 KASSERT(c != NULL && vc >= SND_VOL_C_BEGIN && vc <= SND_VOL_C_END, 1675 ("%s(): invalid reset c=%p vc=%d", __func__, c, vc)); 1676 CHN_LOCKASSERT(c); 1677 1678 if (force == 0 && chn_vpc_autoreset == 0) 1679 return; 1680 1681 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP) 1682 CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]); 1683 } 1684 1685 static u_int32_t 1686 round_pow2(u_int32_t v) 1687 { 1688 u_int32_t ret; 1689 1690 if (v < 2) 1691 v = 2; 1692 ret = 0; 1693 while (v >> ret) 1694 ret++; 1695 ret = 1 << (ret - 1); 1696 while (ret < v) 1697 ret <<= 1; 1698 return ret; 1699 } 1700 1701 static u_int32_t 1702 round_blksz(u_int32_t v, int round) 1703 { 1704 u_int32_t ret, tmp; 1705 1706 if (round < 1) 1707 round = 1; 1708 1709 ret = min(round_pow2(v), CHN_2NDBUFMAXSIZE >> 1); 1710 1711 if (ret > v && (ret >> 1) > 0 && (ret >> 1) >= ((v * 3) >> 2)) 1712 ret >>= 1; 1713 1714 tmp = ret - (ret % round); 1715 while (tmp < 16 || tmp < round) { 1716 ret <<= 1; 1717 tmp = ret - (ret % round); 1718 } 1719 1720 return ret; 1721 } 1722 1723 /* 1724 * 4Front call it DSP Policy, while we call it "Latency Profile". The idea 1725 * is to keep 2nd buffer short so that it doesn't cause long queue during 1726 * buffer transfer. 1727 * 1728 * Latency reference table for 48khz stereo 16bit: (PLAY) 1729 * 1730 * +---------+------------+-----------+------------+ 1731 * | Latency | Blockcount | Blocksize | Buffersize | 1732 * +---------+------------+-----------+------------+ 1733 * | 0 | 2 | 64 | 128 | 1734 * +---------+------------+-----------+------------+ 1735 * | 1 | 4 | 128 | 512 | 1736 * +---------+------------+-----------+------------+ 1737 * | 2 | 8 | 512 | 4096 | 1738 * +---------+------------+-----------+------------+ 1739 * | 3 | 16 | 512 | 8192 | 1740 * +---------+------------+-----------+------------+ 1741 * | 4 | 32 | 512 | 16384 | 1742 * +---------+------------+-----------+------------+ 1743 * | 5 | 32 | 1024 | 32768 | 1744 * +---------+------------+-----------+------------+ 1745 * | 6 | 16 | 2048 | 32768 | 1746 * +---------+------------+-----------+------------+ 1747 * | 7 | 8 | 4096 | 32768 | 1748 * +---------+------------+-----------+------------+ 1749 * | 8 | 4 | 8192 | 32768 | 1750 * +---------+------------+-----------+------------+ 1751 * | 9 | 2 | 16384 | 32768 | 1752 * +---------+------------+-----------+------------+ 1753 * | 10 | 2 | 32768 | 65536 | 1754 * +---------+------------+-----------+------------+ 1755 * 1756 * Recording need a different reference table. All we care is 1757 * gobbling up everything within reasonable buffering threshold. 1758 * 1759 * Latency reference table for 48khz stereo 16bit: (REC) 1760 * 1761 * +---------+------------+-----------+------------+ 1762 * | Latency | Blockcount | Blocksize | Buffersize | 1763 * +---------+------------+-----------+------------+ 1764 * | 0 | 512 | 32 | 16384 | 1765 * +---------+------------+-----------+------------+ 1766 * | 1 | 256 | 64 | 16384 | 1767 * +---------+------------+-----------+------------+ 1768 * | 2 | 128 | 128 | 16384 | 1769 * +---------+------------+-----------+------------+ 1770 * | 3 | 64 | 256 | 16384 | 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 * Calculations for other data rate are entirely based on these reference 1788 * tables. For normal operation, Latency 5 seems give the best, well 1789 * balanced performance for typical workload. Anything below 5 will 1790 * eat up CPU to keep up with increasing context switches because of 1791 * shorter buffer space and usually require the application to handle it 1792 * aggressively through possibly real time programming technique. 1793 * 1794 */ 1795 #define CHN_LATENCY_PBLKCNT_REF \ 1796 {{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}, \ 1797 {1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}} 1798 #define CHN_LATENCY_PBUFSZ_REF \ 1799 {{7, 9, 12, 13, 14, 15, 15, 15, 15, 15, 16}, \ 1800 {11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 17}} 1801 1802 #define CHN_LATENCY_RBLKCNT_REF \ 1803 {{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}, \ 1804 {9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}} 1805 #define CHN_LATENCY_RBUFSZ_REF \ 1806 {{14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16}, \ 1807 {15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17}} 1808 1809 #define CHN_LATENCY_DATA_REF 192000 /* 48khz stereo 16bit ~ 48000 x 2 x 2 */ 1810 1811 static int 1812 chn_calclatency(int dir, int latency, int bps, u_int32_t datarate, 1813 u_int32_t max, int *rblksz, int *rblkcnt) 1814 { 1815 static int pblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1816 CHN_LATENCY_PBLKCNT_REF; 1817 static int pbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1818 CHN_LATENCY_PBUFSZ_REF; 1819 static int rblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1820 CHN_LATENCY_RBLKCNT_REF; 1821 static int rbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1822 CHN_LATENCY_RBUFSZ_REF; 1823 u_int32_t bufsz; 1824 int lprofile, blksz, blkcnt; 1825 1826 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX || 1827 bps < 1 || datarate < 1 || 1828 !(dir == PCMDIR_PLAY || dir == PCMDIR_REC)) { 1829 if (rblksz != NULL) 1830 *rblksz = CHN_2NDBUFMAXSIZE >> 1; 1831 if (rblkcnt != NULL) 1832 *rblkcnt = 2; 1833 printf("%s(): FAILED dir=%d latency=%d bps=%d " 1834 "datarate=%u max=%u\n", 1835 __func__, dir, latency, bps, datarate, max); 1836 return CHN_2NDBUFMAXSIZE; 1837 } 1838 1839 lprofile = chn_latency_profile; 1840 1841 if (dir == PCMDIR_PLAY) { 1842 blkcnt = pblkcnts[lprofile][latency]; 1843 bufsz = pbufszs[lprofile][latency]; 1844 } else { 1845 blkcnt = rblkcnts[lprofile][latency]; 1846 bufsz = rbufszs[lprofile][latency]; 1847 } 1848 1849 bufsz = round_pow2(snd_xbytes(1 << bufsz, CHN_LATENCY_DATA_REF, 1850 datarate)); 1851 if (bufsz > max) 1852 bufsz = max; 1853 blksz = round_blksz(bufsz >> blkcnt, bps); 1854 1855 if (rblksz != NULL) 1856 *rblksz = blksz; 1857 if (rblkcnt != NULL) 1858 *rblkcnt = 1 << blkcnt; 1859 1860 return blksz << blkcnt; 1861 } 1862 1863 static int 1864 chn_resizebuf(struct pcm_channel *c, int latency, 1865 int blkcnt, int blksz) 1866 { 1867 struct snd_dbuf *b, *bs, *pb; 1868 int sblksz, sblkcnt, hblksz, hblkcnt, limit = 0, nsblksz, nsblkcnt; 1869 int ret; 1870 1871 CHN_LOCKASSERT(c); 1872 1873 if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) || 1874 !(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC)) 1875 return EINVAL; 1876 1877 if (latency == -1) { 1878 c->latency = -1; 1879 latency = chn_latency; 1880 } else if (latency == -2) { 1881 latency = c->latency; 1882 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1883 latency = chn_latency; 1884 } else if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1885 return EINVAL; 1886 else { 1887 c->latency = latency; 1888 } 1889 1890 bs = c->bufsoft; 1891 b = c->bufhard; 1892 1893 if (!(blksz == 0 || blkcnt == -1) && 1894 (blksz < 16 || blksz < sndbuf_getalign(bs) || blkcnt < 2 || 1895 (blksz * blkcnt) > CHN_2NDBUFMAXSIZE)) 1896 return EINVAL; 1897 1898 chn_calclatency(c->direction, latency, sndbuf_getalign(bs), 1899 sndbuf_getalign(bs) * sndbuf_getspd(bs), CHN_2NDBUFMAXSIZE, 1900 &sblksz, &sblkcnt); 1901 1902 if (blksz == 0 || blkcnt == -1) { 1903 if (blkcnt == -1) 1904 c->flags &= ~CHN_F_HAS_SIZE; 1905 if (c->flags & CHN_F_HAS_SIZE) { 1906 blksz = sndbuf_getblksz(bs); 1907 blkcnt = sndbuf_getblkcnt(bs); 1908 } 1909 } else 1910 c->flags |= CHN_F_HAS_SIZE; 1911 1912 if (c->flags & CHN_F_HAS_SIZE) { 1913 /* 1914 * The application has requested their own blksz/blkcnt. 1915 * Just obey with it, and let them toast alone. We can 1916 * clamp it to the nearest latency profile, but that would 1917 * defeat the purpose of having custom control. The least 1918 * we can do is round it to the nearest ^2 and align it. 1919 */ 1920 sblksz = round_blksz(blksz, sndbuf_getalign(bs)); 1921 sblkcnt = round_pow2(blkcnt); 1922 } 1923 1924 if (c->parentchannel != NULL) { 1925 pb = c->parentchannel->bufsoft; 1926 CHN_UNLOCK(c); 1927 CHN_LOCK(c->parentchannel); 1928 chn_notify(c->parentchannel, CHN_N_BLOCKSIZE); 1929 CHN_UNLOCK(c->parentchannel); 1930 CHN_LOCK(c); 1931 if (c->direction == PCMDIR_PLAY) { 1932 limit = (pb != NULL) ? 1933 sndbuf_xbytes(sndbuf_getsize(pb), pb, bs) : 0; 1934 } else { 1935 limit = (pb != NULL) ? 1936 sndbuf_xbytes(sndbuf_getblksz(pb), pb, bs) * 2 : 0; 1937 } 1938 } else { 1939 hblkcnt = 2; 1940 if (c->flags & CHN_F_HAS_SIZE) { 1941 hblksz = round_blksz(sndbuf_xbytes(sblksz, bs, b), 1942 sndbuf_getalign(b)); 1943 hblkcnt = round_pow2(sndbuf_getblkcnt(bs)); 1944 } else 1945 chn_calclatency(c->direction, latency, 1946 sndbuf_getalign(b), 1947 sndbuf_getalign(b) * sndbuf_getspd(b), 1948 CHN_2NDBUFMAXSIZE, &hblksz, &hblkcnt); 1949 1950 if ((hblksz << 1) > sndbuf_getmaxsize(b)) 1951 hblksz = round_blksz(sndbuf_getmaxsize(b) >> 1, 1952 sndbuf_getalign(b)); 1953 1954 while ((hblksz * hblkcnt) > sndbuf_getmaxsize(b)) { 1955 if (hblkcnt < 4) 1956 hblksz >>= 1; 1957 else 1958 hblkcnt >>= 1; 1959 } 1960 1961 hblksz -= hblksz % sndbuf_getalign(b); 1962 1963 #if 0 1964 hblksz = sndbuf_getmaxsize(b) >> 1; 1965 hblksz -= hblksz % sndbuf_getalign(b); 1966 hblkcnt = 2; 1967 #endif 1968 1969 CHN_UNLOCK(c); 1970 if (chn_usefrags == 0 || 1971 CHANNEL_SETFRAGMENTS(c->methods, c->devinfo, 1972 hblksz, hblkcnt) != 0) 1973 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, 1974 c->devinfo, hblksz)); 1975 CHN_LOCK(c); 1976 1977 if (!CHN_EMPTY(c, children)) { 1978 nsblksz = round_blksz( 1979 sndbuf_xbytes(sndbuf_getblksz(b), b, bs), 1980 sndbuf_getalign(bs)); 1981 nsblkcnt = sndbuf_getblkcnt(b); 1982 if (c->direction == PCMDIR_PLAY) { 1983 do { 1984 nsblkcnt--; 1985 } while (nsblkcnt >= 2 && 1986 nsblksz * nsblkcnt >= sblksz * sblkcnt); 1987 nsblkcnt++; 1988 } 1989 sblksz = nsblksz; 1990 sblkcnt = nsblkcnt; 1991 limit = 0; 1992 } else 1993 limit = sndbuf_xbytes(sndbuf_getblksz(b), b, bs) * 2; 1994 } 1995 1996 if (limit > CHN_2NDBUFMAXSIZE) 1997 limit = CHN_2NDBUFMAXSIZE; 1998 1999 #if 0 2000 while (limit > 0 && (sblksz * sblkcnt) > limit) { 2001 if (sblkcnt < 4) 2002 break; 2003 sblkcnt >>= 1; 2004 } 2005 #endif 2006 2007 while ((sblksz * sblkcnt) < limit) 2008 sblkcnt <<= 1; 2009 2010 while ((sblksz * sblkcnt) > CHN_2NDBUFMAXSIZE) { 2011 if (sblkcnt < 4) 2012 sblksz >>= 1; 2013 else 2014 sblkcnt >>= 1; 2015 } 2016 2017 sblksz -= sblksz % sndbuf_getalign(bs); 2018 2019 if (sndbuf_getblkcnt(bs) != sblkcnt || sndbuf_getblksz(bs) != sblksz || 2020 sndbuf_getsize(bs) != (sblkcnt * sblksz)) { 2021 ret = sndbuf_remalloc(bs, sblkcnt, sblksz); 2022 if (ret != 0) { 2023 device_printf(c->dev, "%s(): Failed: %d %d\n", 2024 __func__, sblkcnt, sblksz); 2025 return ret; 2026 } 2027 } 2028 2029 /* 2030 * Interrupt timeout 2031 */ 2032 c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) / 2033 ((u_int64_t)sndbuf_getspd(bs) * sndbuf_getalign(bs)); 2034 if (c->parentchannel != NULL) 2035 c->timeout = min(c->timeout, c->parentchannel->timeout); 2036 if (c->timeout < 1) 2037 c->timeout = 1; 2038 2039 /* 2040 * OSSv4 docs: "By default OSS will set the low water level equal 2041 * to the fragment size which is optimal in most cases." 2042 */ 2043 c->lw = sndbuf_getblksz(bs); 2044 chn_resetbuf(c); 2045 2046 if (snd_verbose > 3) 2047 device_printf(c->dev, "%s(): %s (%s) timeout=%u " 2048 "b[%d/%d/%d] bs[%d/%d/%d] limit=%d\n", 2049 __func__, CHN_DIRSTR(c), 2050 (c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware", 2051 c->timeout, 2052 sndbuf_getsize(b), sndbuf_getblksz(b), 2053 sndbuf_getblkcnt(b), 2054 sndbuf_getsize(bs), sndbuf_getblksz(bs), 2055 sndbuf_getblkcnt(bs), limit); 2056 2057 return 0; 2058 } 2059 2060 int 2061 chn_setlatency(struct pcm_channel *c, int latency) 2062 { 2063 CHN_LOCKASSERT(c); 2064 /* Destroy blksz/blkcnt, enforce latency profile. */ 2065 return chn_resizebuf(c, latency, -1, 0); 2066 } 2067 2068 int 2069 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz) 2070 { 2071 CHN_LOCKASSERT(c); 2072 /* Destroy latency profile, enforce blksz/blkcnt */ 2073 return chn_resizebuf(c, -1, blkcnt, blksz); 2074 } 2075 2076 int 2077 chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed) 2078 { 2079 struct pcmchan_caps *caps; 2080 uint32_t hwspeed, delta; 2081 int ret; 2082 2083 CHN_LOCKASSERT(c); 2084 2085 if (speed < 1 || format == 0 || CHN_STARTED(c)) 2086 return (EINVAL); 2087 2088 c->format = format; 2089 c->speed = speed; 2090 2091 caps = chn_getcaps(c); 2092 2093 hwspeed = speed; 2094 RANGE(hwspeed, caps->minspeed, caps->maxspeed); 2095 2096 sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo, 2097 hwspeed)); 2098 hwspeed = sndbuf_getspd(c->bufhard); 2099 2100 delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed); 2101 2102 if (delta <= feeder_rate_round) 2103 c->speed = hwspeed; 2104 2105 ret = feeder_chain(c); 2106 2107 if (ret == 0) 2108 ret = CHANNEL_SETFORMAT(c->methods, c->devinfo, 2109 sndbuf_getfmt(c->bufhard)); 2110 2111 if (ret == 0) 2112 ret = chn_resizebuf(c, -2, 0, 0); 2113 2114 return (ret); 2115 } 2116 2117 int 2118 chn_setspeed(struct pcm_channel *c, uint32_t speed) 2119 { 2120 uint32_t oldformat, oldspeed, format; 2121 int ret; 2122 2123 #if 0 2124 /* XXX force 48k */ 2125 if (c->format & AFMT_PASSTHROUGH) 2126 speed = AFMT_PASSTHROUGH_RATE; 2127 #endif 2128 2129 oldformat = c->format; 2130 oldspeed = c->speed; 2131 format = oldformat; 2132 2133 ret = chn_setparam(c, format, speed); 2134 if (ret != 0) { 2135 if (snd_verbose > 3) 2136 device_printf(c->dev, 2137 "%s(): Setting speed %d failed, " 2138 "falling back to %d\n", 2139 __func__, speed, oldspeed); 2140 chn_setparam(c, c->format, oldspeed); 2141 } 2142 2143 return (ret); 2144 } 2145 2146 int 2147 chn_setformat(struct pcm_channel *c, uint32_t format) 2148 { 2149 uint32_t oldformat, oldspeed, speed; 2150 int ret; 2151 2152 /* XXX force stereo */ 2153 if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) { 2154 format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL, 2155 AFMT_PASSTHROUGH_EXTCHANNEL); 2156 } 2157 2158 oldformat = c->format; 2159 oldspeed = c->speed; 2160 speed = oldspeed; 2161 2162 ret = chn_setparam(c, format, speed); 2163 if (ret != 0) { 2164 if (snd_verbose > 3) 2165 device_printf(c->dev, 2166 "%s(): Format change 0x%08x failed, " 2167 "falling back to 0x%08x\n", 2168 __func__, format, oldformat); 2169 chn_setparam(c, oldformat, oldspeed); 2170 } 2171 2172 return (ret); 2173 } 2174 2175 void 2176 chn_syncstate(struct pcm_channel *c) 2177 { 2178 struct snddev_info *d; 2179 struct snd_mixer *m; 2180 2181 d = (c != NULL) ? c->parentsnddev : NULL; 2182 m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 : 2183 NULL; 2184 2185 if (d == NULL || m == NULL) 2186 return; 2187 2188 CHN_LOCKASSERT(c); 2189 2190 if (c->feederflags & (1 << FEEDER_VOLUME)) { 2191 uint32_t parent; 2192 int vol, pvol, left, right, center; 2193 2194 if (c->direction == PCMDIR_PLAY && 2195 (d->flags & SD_F_SOFTPCMVOL)) { 2196 /* CHN_UNLOCK(c); */ 2197 vol = mix_get(m, SOUND_MIXER_PCM); 2198 parent = mix_getparent(m, SOUND_MIXER_PCM); 2199 if (parent != SOUND_MIXER_NONE) 2200 pvol = mix_get(m, parent); 2201 else 2202 pvol = 100 | (100 << 8); 2203 /* CHN_LOCK(c); */ 2204 } else { 2205 vol = 100 | (100 << 8); 2206 pvol = vol; 2207 } 2208 2209 if (vol == -1) { 2210 device_printf(c->dev, 2211 "Soft PCM Volume: Failed to read pcm " 2212 "default value\n"); 2213 vol = 100 | (100 << 8); 2214 } 2215 2216 if (pvol == -1) { 2217 device_printf(c->dev, 2218 "Soft PCM Volume: Failed to read parent " 2219 "default value\n"); 2220 pvol = 100 | (100 << 8); 2221 } 2222 2223 left = ((vol & 0x7f) * (pvol & 0x7f)) / 100; 2224 right = (((vol >> 8) & 0x7f) * ((pvol >> 8) & 0x7f)) / 100; 2225 center = (left + right) >> 1; 2226 2227 chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right, center); 2228 } 2229 2230 if (c->feederflags & (1 << FEEDER_EQ)) { 2231 struct pcm_feeder *f; 2232 int treble, bass, state; 2233 2234 /* CHN_UNLOCK(c); */ 2235 treble = mix_get(m, SOUND_MIXER_TREBLE); 2236 bass = mix_get(m, SOUND_MIXER_BASS); 2237 /* CHN_LOCK(c); */ 2238 2239 if (treble == -1) 2240 treble = 50; 2241 else 2242 treble = ((treble & 0x7f) + 2243 ((treble >> 8) & 0x7f)) >> 1; 2244 2245 if (bass == -1) 2246 bass = 50; 2247 else 2248 bass = ((bass & 0x7f) + ((bass >> 8) & 0x7f)) >> 1; 2249 2250 f = feeder_find(c, FEEDER_EQ); 2251 if (f != NULL) { 2252 if (FEEDER_SET(f, FEEDEQ_TREBLE, treble) != 0) 2253 device_printf(c->dev, 2254 "EQ: Failed to set treble -- %d\n", 2255 treble); 2256 if (FEEDER_SET(f, FEEDEQ_BASS, bass) != 0) 2257 device_printf(c->dev, 2258 "EQ: Failed to set bass -- %d\n", 2259 bass); 2260 if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0) 2261 device_printf(c->dev, 2262 "EQ: Failed to set preamp -- %d\n", 2263 d->eqpreamp); 2264 if (d->flags & SD_F_EQ_BYPASSED) 2265 state = FEEDEQ_BYPASS; 2266 else if (d->flags & SD_F_EQ_ENABLED) 2267 state = FEEDEQ_ENABLE; 2268 else 2269 state = FEEDEQ_DISABLE; 2270 if (FEEDER_SET(f, FEEDEQ_STATE, state) != 0) 2271 device_printf(c->dev, 2272 "EQ: Failed to set state -- %d\n", state); 2273 } 2274 } 2275 } 2276 2277 int 2278 chn_trigger(struct pcm_channel *c, int go) 2279 { 2280 struct snddev_info *d = c->parentsnddev; 2281 int ret; 2282 2283 CHN_LOCKASSERT(c); 2284 if (!PCMTRIG_COMMON(go)) 2285 return (CHANNEL_TRIGGER(c->methods, c->devinfo, go)); 2286 2287 if (go == c->trigger) 2288 return (0); 2289 2290 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go); 2291 if (ret != 0) 2292 return (ret); 2293 2294 switch (go) { 2295 case PCMTRIG_START: 2296 if (snd_verbose > 3) 2297 device_printf(c->dev, 2298 "%s() %s: calling go=0x%08x , " 2299 "prev=0x%08x\n", __func__, c->name, go, 2300 c->trigger); 2301 if (c->trigger != PCMTRIG_START) { 2302 c->trigger = go; 2303 CHN_UNLOCK(c); 2304 PCM_LOCK(d); 2305 CHN_INSERT_HEAD(d, c, channels.pcm.busy); 2306 PCM_UNLOCK(d); 2307 CHN_LOCK(c); 2308 chn_syncstate(c); 2309 } 2310 break; 2311 case PCMTRIG_STOP: 2312 case PCMTRIG_ABORT: 2313 if (snd_verbose > 3) 2314 device_printf(c->dev, 2315 "%s() %s: calling go=0x%08x , " 2316 "prev=0x%08x\n", __func__, c->name, go, 2317 c->trigger); 2318 if (c->trigger == PCMTRIG_START) { 2319 c->trigger = go; 2320 CHN_UNLOCK(c); 2321 PCM_LOCK(d); 2322 CHN_REMOVE(d, c, channels.pcm.busy); 2323 PCM_UNLOCK(d); 2324 CHN_LOCK(c); 2325 } 2326 break; 2327 default: 2328 break; 2329 } 2330 2331 return (0); 2332 } 2333 2334 /** 2335 * @brief Queries sound driver for sample-aligned hardware buffer pointer index 2336 * 2337 * This function obtains the hardware pointer location, then aligns it to 2338 * the current bytes-per-sample value before returning. (E.g., a channel 2339 * running in 16 bit stereo mode would require 4 bytes per sample, so a 2340 * hwptr value ranging from 32-35 would be returned as 32.) 2341 * 2342 * @param c PCM channel context 2343 * @returns sample-aligned hardware buffer pointer index 2344 */ 2345 int 2346 chn_getptr(struct pcm_channel *c) 2347 { 2348 int hwptr; 2349 2350 CHN_LOCKASSERT(c); 2351 hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0; 2352 return (hwptr - (hwptr % sndbuf_getalign(c->bufhard))); 2353 } 2354 2355 struct pcmchan_caps * 2356 chn_getcaps(struct pcm_channel *c) 2357 { 2358 CHN_LOCKASSERT(c); 2359 return CHANNEL_GETCAPS(c->methods, c->devinfo); 2360 } 2361 2362 u_int32_t 2363 chn_getformats(struct pcm_channel *c) 2364 { 2365 u_int32_t *fmtlist, fmts; 2366 int i; 2367 2368 fmtlist = chn_getcaps(c)->fmtlist; 2369 fmts = 0; 2370 for (i = 0; fmtlist[i]; i++) 2371 fmts |= fmtlist[i]; 2372 2373 /* report software-supported formats */ 2374 if (!CHN_BITPERFECT(c) && report_soft_formats) 2375 fmts |= AFMT_CONVERTIBLE; 2376 2377 return (AFMT_ENCODING(fmts)); 2378 } 2379 2380 int 2381 chn_notify(struct pcm_channel *c, u_int32_t flags) 2382 { 2383 struct pcm_channel *ch; 2384 struct pcmchan_caps *caps; 2385 uint32_t bestformat, bestspeed, besthwformat, *vchanformat, *vchanrate; 2386 uint32_t vpflags; 2387 int dirty, err, run, nrun; 2388 2389 CHN_LOCKASSERT(c); 2390 2391 if (CHN_EMPTY(c, children)) 2392 return (ENODEV); 2393 2394 err = 0; 2395 2396 /* 2397 * If the hwchan is running, we can't change its rate, format or 2398 * blocksize 2399 */ 2400 run = (CHN_STARTED(c)) ? 1 : 0; 2401 if (run) 2402 flags &= CHN_N_VOLUME | CHN_N_TRIGGER; 2403 2404 if (flags & CHN_N_RATE) { 2405 /* 2406 * XXX I'll make good use of this someday. 2407 * However this is currently being superseded by 2408 * the availability of CHN_F_VCHAN_DYNAMIC. 2409 */ 2410 } 2411 2412 if (flags & CHN_N_FORMAT) { 2413 /* 2414 * XXX I'll make good use of this someday. 2415 * However this is currently being superseded by 2416 * the availability of CHN_F_VCHAN_DYNAMIC. 2417 */ 2418 } 2419 2420 if (flags & CHN_N_VOLUME) { 2421 /* 2422 * XXX I'll make good use of this someday, though 2423 * soft volume control is currently pretty much 2424 * integrated. 2425 */ 2426 } 2427 2428 if (flags & CHN_N_BLOCKSIZE) { 2429 /* 2430 * Set to default latency profile 2431 */ 2432 chn_setlatency(c, chn_latency); 2433 } 2434 2435 if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) { 2436 nrun = CHN_EMPTY(c, children.busy) ? 0 : 1; 2437 if (nrun && !run) 2438 err = chn_start(c, 1); 2439 if (!nrun && run) 2440 chn_abort(c); 2441 flags &= ~CHN_N_TRIGGER; 2442 } 2443 2444 if (flags & CHN_N_TRIGGER) { 2445 if (c->direction == PCMDIR_PLAY) { 2446 vchanformat = &c->parentsnddev->pvchanformat; 2447 vchanrate = &c->parentsnddev->pvchanrate; 2448 } else { 2449 vchanformat = &c->parentsnddev->rvchanformat; 2450 vchanrate = &c->parentsnddev->rvchanrate; 2451 } 2452 2453 /* Dynamic Virtual Channel */ 2454 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) { 2455 bestformat = *vchanformat; 2456 bestspeed = *vchanrate; 2457 } else { 2458 bestformat = 0; 2459 bestspeed = 0; 2460 } 2461 2462 besthwformat = 0; 2463 nrun = 0; 2464 caps = chn_getcaps(c); 2465 dirty = 0; 2466 vpflags = 0; 2467 2468 CHN_FOREACH(ch, c, children.busy) { 2469 CHN_LOCK(ch); 2470 if ((ch->format & AFMT_PASSTHROUGH) && 2471 snd_fmtvalid(ch->format, caps->fmtlist)) { 2472 bestformat = ch->format; 2473 bestspeed = ch->speed; 2474 CHN_UNLOCK(ch); 2475 vpflags = CHN_F_PASSTHROUGH; 2476 nrun++; 2477 break; 2478 } 2479 if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) { 2480 if (c->flags & CHN_F_VCHAN_ADAPTIVE) { 2481 bestspeed = ch->speed; 2482 RANGE(bestspeed, caps->minspeed, 2483 caps->maxspeed); 2484 besthwformat = snd_fmtbest(ch->format, 2485 caps->fmtlist); 2486 if (besthwformat != 0) 2487 bestformat = besthwformat; 2488 } 2489 CHN_UNLOCK(ch); 2490 vpflags = CHN_F_EXCLUSIVE; 2491 nrun++; 2492 continue; 2493 } 2494 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) || 2495 vpflags != 0) { 2496 CHN_UNLOCK(ch); 2497 nrun++; 2498 continue; 2499 } 2500 if (ch->speed > bestspeed) { 2501 bestspeed = ch->speed; 2502 RANGE(bestspeed, caps->minspeed, 2503 caps->maxspeed); 2504 } 2505 besthwformat = snd_fmtbest(ch->format, caps->fmtlist); 2506 if (!(besthwformat & AFMT_VCHAN)) { 2507 CHN_UNLOCK(ch); 2508 nrun++; 2509 continue; 2510 } 2511 if (AFMT_CHANNEL(besthwformat) > 2512 AFMT_CHANNEL(bestformat)) 2513 bestformat = besthwformat; 2514 else if (AFMT_CHANNEL(besthwformat) == 2515 AFMT_CHANNEL(bestformat) && 2516 AFMT_BIT(besthwformat) > AFMT_BIT(bestformat)) 2517 bestformat = besthwformat; 2518 CHN_UNLOCK(ch); 2519 nrun++; 2520 } 2521 2522 if (bestformat == 0) 2523 bestformat = c->format; 2524 if (bestspeed == 0) 2525 bestspeed = c->speed; 2526 2527 if (bestformat != c->format || bestspeed != c->speed) 2528 dirty = 1; 2529 2530 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2531 c->flags |= vpflags; 2532 2533 if (nrun && !run) { 2534 if (dirty) { 2535 bestspeed = CHANNEL_SETSPEED(c->methods, 2536 c->devinfo, bestspeed); 2537 err = chn_reset(c, bestformat, bestspeed); 2538 } 2539 if (err == 0 && dirty) { 2540 CHN_FOREACH(ch, c, children.busy) { 2541 CHN_LOCK(ch); 2542 if (VCHAN_SYNC_REQUIRED(ch)) 2543 vchan_sync(ch); 2544 CHN_UNLOCK(ch); 2545 } 2546 } 2547 if (err == 0) { 2548 if (dirty) 2549 c->flags |= CHN_F_DIRTY; 2550 err = chn_start(c, 1); 2551 } 2552 } 2553 2554 if (nrun && run && dirty) { 2555 chn_abort(c); 2556 bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo, 2557 bestspeed); 2558 err = chn_reset(c, bestformat, bestspeed); 2559 if (err == 0) { 2560 CHN_FOREACH(ch, c, children.busy) { 2561 CHN_LOCK(ch); 2562 if (VCHAN_SYNC_REQUIRED(ch)) 2563 vchan_sync(ch); 2564 CHN_UNLOCK(ch); 2565 } 2566 } 2567 if (err == 0) { 2568 c->flags |= CHN_F_DIRTY; 2569 err = chn_start(c, 1); 2570 } 2571 } 2572 2573 if (err == 0 && !(bestformat & AFMT_PASSTHROUGH) && 2574 (bestformat & AFMT_VCHAN)) { 2575 *vchanformat = bestformat; 2576 *vchanrate = bestspeed; 2577 } 2578 2579 if (!nrun && run) { 2580 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2581 bestformat = *vchanformat; 2582 bestspeed = *vchanrate; 2583 chn_abort(c); 2584 if (c->format != bestformat || c->speed != bestspeed) 2585 chn_reset(c, bestformat, bestspeed); 2586 } 2587 } 2588 2589 return (err); 2590 } 2591 2592 /** 2593 * @brief Fetch array of supported discrete sample rates 2594 * 2595 * Wrapper for CHANNEL_GETRATES. Please see channel_if.m:getrates() for 2596 * detailed information. 2597 * 2598 * @note If the operation isn't supported, this function will just return 0 2599 * (no rates in the array), and *rates will be set to NULL. Callers 2600 * should examine rates @b only if this function returns non-zero. 2601 * 2602 * @param c pcm channel to examine 2603 * @param rates pointer to array of integers; rate table will be recorded here 2604 * 2605 * @return number of rates in the array pointed to be @c rates 2606 */ 2607 int 2608 chn_getrates(struct pcm_channel *c, int **rates) 2609 { 2610 KASSERT(rates != NULL, ("rates is null")); 2611 CHN_LOCKASSERT(c); 2612 return CHANNEL_GETRATES(c->methods, c->devinfo, rates); 2613 } 2614 2615 /** 2616 * @brief Remove channel from a sync group, if there is one. 2617 * 2618 * This function is initially intended for the following conditions: 2619 * - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl) 2620 * - Closing a device. (A channel can't be destroyed if it's still in use.) 2621 * 2622 * @note Before calling this function, the syncgroup list mutex must be 2623 * held. (Consider pcm_channel::sm protected by the SG list mutex 2624 * whether @c c is locked or not.) 2625 * 2626 * @param c channel device to be started or closed 2627 * @returns If this channel was the only member of a group, the group ID 2628 * is returned to the caller so that the caller can release it 2629 * via free_unr() after giving up the syncgroup lock. Else it 2630 * returns 0. 2631 */ 2632 int 2633 chn_syncdestroy(struct pcm_channel *c) 2634 { 2635 struct pcmchan_syncmember *sm; 2636 struct pcmchan_syncgroup *sg; 2637 int sg_id; 2638 2639 sg_id = 0; 2640 2641 PCM_SG_LOCKASSERT(MA_OWNED); 2642 2643 if (c->sm != NULL) { 2644 sm = c->sm; 2645 sg = sm->parent; 2646 c->sm = NULL; 2647 2648 KASSERT(sg != NULL, ("syncmember has null parent")); 2649 2650 SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link); 2651 free(sm, M_DEVBUF); 2652 2653 if (SLIST_EMPTY(&sg->members)) { 2654 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2655 sg_id = sg->id; 2656 free(sg, M_DEVBUF); 2657 } 2658 } 2659 2660 return sg_id; 2661 } 2662 2663 #ifdef OSSV4_EXPERIMENT 2664 int 2665 chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak) 2666 { 2667 CHN_LOCKASSERT(c); 2668 return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak); 2669 } 2670 #endif 2671