Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/channel.c
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1 /*- 2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 3 * Portions Copyright (c) Ryan Beasley <ryan.beasley@gmail.com> - GSoC 2006 4 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 5 * Portions Copyright (c) Luigi Rizzo <luigi@FreeBSD.org> - 1997-99 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include "opt_isa.h" 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 SND_DECLARE_FILE("$FreeBSD: releng/10.3/sys/dev/sound/pcm/channel.c 283950 2015-06-03 15:32:43Z hselasky $"); 42 43 int report_soft_formats = 1; 44 SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_formats, CTLFLAG_RW, 45 &report_soft_formats, 1, "report software-emulated formats"); 46 47 int report_soft_matrix = 1; 48 SYSCTL_INT(_hw_snd, OID_AUTO, report_soft_matrix, CTLFLAG_RW, 49 &report_soft_matrix, 1, "report software-emulated channel matrixing"); 50 51 int chn_latency = CHN_LATENCY_DEFAULT; 52 TUNABLE_INT("hw.snd.latency", &chn_latency); 53 54 static int 55 sysctl_hw_snd_latency(SYSCTL_HANDLER_ARGS) 56 { 57 int err, val; 58 59 val = chn_latency; 60 err = sysctl_handle_int(oidp, &val, 0, req); 61 if (err != 0 || req->newptr == NULL) 62 return err; 63 if (val < CHN_LATENCY_MIN || val > CHN_LATENCY_MAX) 64 err = EINVAL; 65 else 66 chn_latency = val; 67 68 return err; 69 } 70 SYSCTL_PROC(_hw_snd, OID_AUTO, latency, CTLTYPE_INT | CTLFLAG_RW, 71 0, sizeof(int), sysctl_hw_snd_latency, "I", 72 "buffering latency (0=low ... 10=high)"); 73 74 int chn_latency_profile = CHN_LATENCY_PROFILE_DEFAULT; 75 TUNABLE_INT("hw.snd.latency_profile", &chn_latency_profile); 76 77 static int 78 sysctl_hw_snd_latency_profile(SYSCTL_HANDLER_ARGS) 79 { 80 int err, val; 81 82 val = chn_latency_profile; 83 err = sysctl_handle_int(oidp, &val, 0, req); 84 if (err != 0 || req->newptr == NULL) 85 return err; 86 if (val < CHN_LATENCY_PROFILE_MIN || val > CHN_LATENCY_PROFILE_MAX) 87 err = EINVAL; 88 else 89 chn_latency_profile = val; 90 91 return err; 92 } 93 SYSCTL_PROC(_hw_snd, OID_AUTO, latency_profile, CTLTYPE_INT | CTLFLAG_RW, 94 0, sizeof(int), sysctl_hw_snd_latency_profile, "I", 95 "buffering latency profile (0=aggresive 1=safe)"); 96 97 static int chn_timeout = CHN_TIMEOUT; 98 TUNABLE_INT("hw.snd.timeout", &chn_timeout); 99 #ifdef SND_DEBUG 100 static int 101 sysctl_hw_snd_timeout(SYSCTL_HANDLER_ARGS) 102 { 103 int err, val; 104 105 val = chn_timeout; 106 err = sysctl_handle_int(oidp, &val, 0, req); 107 if (err != 0 || req->newptr == NULL) 108 return err; 109 if (val < CHN_TIMEOUT_MIN || val > CHN_TIMEOUT_MAX) 110 err = EINVAL; 111 else 112 chn_timeout = val; 113 114 return err; 115 } 116 SYSCTL_PROC(_hw_snd, OID_AUTO, timeout, CTLTYPE_INT | CTLFLAG_RW, 117 0, sizeof(int), sysctl_hw_snd_timeout, "I", 118 "interrupt timeout (1 - 10) seconds"); 119 #endif 120 121 static int chn_vpc_autoreset = 1; 122 TUNABLE_INT("hw.snd.vpc_autoreset", &chn_vpc_autoreset); 123 SYSCTL_INT(_hw_snd, OID_AUTO, vpc_autoreset, CTLFLAG_RW, 124 &chn_vpc_autoreset, 0, "automatically reset channels volume to 0db"); 125 126 static int chn_vol_0db_pcm = SND_VOL_0DB_PCM; 127 TUNABLE_INT("hw.snd.vpc_0db", &chn_vol_0db_pcm); 128 129 static void 130 chn_vpc_proc(int reset, int db) 131 { 132 struct snddev_info *d; 133 struct pcm_channel *c; 134 int i; 135 136 for (i = 0; pcm_devclass != NULL && 137 i < devclass_get_maxunit(pcm_devclass); i++) { 138 d = devclass_get_softc(pcm_devclass, i); 139 if (!PCM_REGISTERED(d)) 140 continue; 141 PCM_LOCK(d); 142 PCM_WAIT(d); 143 PCM_ACQUIRE(d); 144 CHN_FOREACH(c, d, channels.pcm) { 145 CHN_LOCK(c); 146 CHN_SETVOLUME(c, SND_VOL_C_PCM, SND_CHN_T_VOL_0DB, db); 147 if (reset != 0) 148 chn_vpc_reset(c, SND_VOL_C_PCM, 1); 149 CHN_UNLOCK(c); 150 } 151 PCM_RELEASE(d); 152 PCM_UNLOCK(d); 153 } 154 } 155 156 static int 157 sysctl_hw_snd_vpc_0db(SYSCTL_HANDLER_ARGS) 158 { 159 int err, val; 160 161 val = chn_vol_0db_pcm; 162 err = sysctl_handle_int(oidp, &val, 0, req); 163 if (err != 0 || req->newptr == NULL) 164 return (err); 165 if (val < SND_VOL_0DB_MIN || val > SND_VOL_0DB_MAX) 166 return (EINVAL); 167 168 chn_vol_0db_pcm = val; 169 chn_vpc_proc(0, val); 170 171 return (0); 172 } 173 SYSCTL_PROC(_hw_snd, OID_AUTO, vpc_0db, CTLTYPE_INT | CTLFLAG_RW, 174 0, sizeof(int), sysctl_hw_snd_vpc_0db, "I", 175 "0db relative level"); 176 177 static int 178 sysctl_hw_snd_vpc_reset(SYSCTL_HANDLER_ARGS) 179 { 180 int err, val; 181 182 val = 0; 183 err = sysctl_handle_int(oidp, &val, 0, req); 184 if (err != 0 || req->newptr == NULL || val == 0) 185 return (err); 186 187 chn_vol_0db_pcm = SND_VOL_0DB_PCM; 188 chn_vpc_proc(1, SND_VOL_0DB_PCM); 189 190 return (0); 191 } 192 SYSCTL_PROC(_hw_snd, OID_AUTO, vpc_reset, CTLTYPE_INT | CTLFLAG_RW, 193 0, sizeof(int), sysctl_hw_snd_vpc_reset, "I", 194 "reset volume on all channels"); 195 196 static int chn_usefrags = 0; 197 TUNABLE_INT("hw.snd.usefrags", &chn_usefrags); 198 static int chn_syncdelay = -1; 199 TUNABLE_INT("hw.snd.syncdelay", &chn_syncdelay); 200 #ifdef SND_DEBUG 201 SYSCTL_INT(_hw_snd, OID_AUTO, usefrags, CTLFLAG_RW, 202 &chn_usefrags, 1, "prefer setfragments() over setblocksize()"); 203 SYSCTL_INT(_hw_snd, OID_AUTO, syncdelay, CTLFLAG_RW, 204 &chn_syncdelay, 1, 205 "append (0-1000) millisecond trailing buffer delay on each sync"); 206 #endif 207 208 /** 209 * @brief Channel sync group lock 210 * 211 * Clients should acquire this lock @b without holding any channel locks 212 * before touching syncgroups or the main syncgroup list. 213 */ 214 struct mtx snd_pcm_syncgroups_mtx; 215 MTX_SYSINIT(pcm_syncgroup, &snd_pcm_syncgroups_mtx, "PCM channel sync group lock", MTX_DEF); 216 /** 217 * @brief syncgroups' master list 218 * 219 * Each time a channel syncgroup is created, it's added to this list. This 220 * list should only be accessed with @sa snd_pcm_syncgroups_mtx held. 221 * 222 * See SNDCTL_DSP_SYNCGROUP for more information. 223 */ 224 struct pcm_synclist snd_pcm_syncgroups = SLIST_HEAD_INITIALIZER(snd_pcm_syncgroups); 225 226 static void 227 chn_lockinit(struct pcm_channel *c, int dir) 228 { 229 switch (dir) { 230 case PCMDIR_PLAY: 231 c->lock = snd_mtxcreate(c->name, "pcm play channel"); 232 cv_init(&c->intr_cv, "pcmwr"); 233 break; 234 case PCMDIR_PLAY_VIRTUAL: 235 c->lock = snd_mtxcreate(c->name, "pcm virtual play channel"); 236 cv_init(&c->intr_cv, "pcmwrv"); 237 break; 238 case PCMDIR_REC: 239 c->lock = snd_mtxcreate(c->name, "pcm record channel"); 240 cv_init(&c->intr_cv, "pcmrd"); 241 break; 242 case PCMDIR_REC_VIRTUAL: 243 c->lock = snd_mtxcreate(c->name, "pcm virtual record channel"); 244 cv_init(&c->intr_cv, "pcmrdv"); 245 break; 246 default: 247 panic("%s(): Invalid direction=%d", __func__, dir); 248 break; 249 } 250 251 cv_init(&c->cv, "pcmchn"); 252 } 253 254 static void 255 chn_lockdestroy(struct pcm_channel *c) 256 { 257 CHN_LOCKASSERT(c); 258 259 CHN_BROADCAST(&c->cv); 260 CHN_BROADCAST(&c->intr_cv); 261 262 cv_destroy(&c->cv); 263 cv_destroy(&c->intr_cv); 264 265 snd_mtxfree(c->lock); 266 } 267 268 /** 269 * @brief Determine channel is ready for I/O 270 * 271 * @retval 1 = ready for I/O 272 * @retval 0 = not ready for I/O 273 */ 274 static int 275 chn_polltrigger(struct pcm_channel *c) 276 { 277 struct snd_dbuf *bs = c->bufsoft; 278 u_int delta; 279 280 CHN_LOCKASSERT(c); 281 282 if (c->flags & CHN_F_MMAP) { 283 if (sndbuf_getprevtotal(bs) < c->lw) 284 delta = c->lw; 285 else 286 delta = sndbuf_gettotal(bs) - sndbuf_getprevtotal(bs); 287 } else { 288 if (c->direction == PCMDIR_PLAY) 289 delta = sndbuf_getfree(bs); 290 else 291 delta = sndbuf_getready(bs); 292 } 293 294 return ((delta < c->lw) ? 0 : 1); 295 } 296 297 static void 298 chn_pollreset(struct pcm_channel *c) 299 { 300 301 CHN_LOCKASSERT(c); 302 sndbuf_updateprevtotal(c->bufsoft); 303 } 304 305 static void 306 chn_wakeup(struct pcm_channel *c) 307 { 308 struct snd_dbuf *bs; 309 struct pcm_channel *ch; 310 311 CHN_LOCKASSERT(c); 312 313 bs = c->bufsoft; 314 315 if (CHN_EMPTY(c, children.busy)) { 316 if (SEL_WAITING(sndbuf_getsel(bs)) && chn_polltrigger(c)) 317 selwakeuppri(sndbuf_getsel(bs), PRIBIO); 318 if (c->flags & CHN_F_SLEEPING) { 319 /* 320 * Ok, I can just panic it right here since it is 321 * quite obvious that we never allow multiple waiters 322 * from userland. I'm too generous... 323 */ 324 CHN_BROADCAST(&c->intr_cv); 325 } 326 } else { 327 CHN_FOREACH(ch, c, children.busy) { 328 CHN_LOCK(ch); 329 chn_wakeup(ch); 330 CHN_UNLOCK(ch); 331 } 332 } 333 } 334 335 static int 336 chn_sleep(struct pcm_channel *c, int timeout) 337 { 338 int ret; 339 340 CHN_LOCKASSERT(c); 341 342 if (c->flags & CHN_F_DEAD) 343 return (EINVAL); 344 345 c->flags |= CHN_F_SLEEPING; 346 ret = cv_timedwait_sig(&c->intr_cv, c->lock, timeout); 347 c->flags &= ~CHN_F_SLEEPING; 348 349 return ((c->flags & CHN_F_DEAD) ? EINVAL : ret); 350 } 351 352 /* 353 * chn_dmaupdate() tracks the status of a dma transfer, 354 * updating pointers. 355 */ 356 357 static unsigned int 358 chn_dmaupdate(struct pcm_channel *c) 359 { 360 struct snd_dbuf *b = c->bufhard; 361 unsigned int delta, old, hwptr, amt; 362 363 KASSERT(sndbuf_getsize(b) > 0, ("bufsize == 0")); 364 CHN_LOCKASSERT(c); 365 366 old = sndbuf_gethwptr(b); 367 hwptr = chn_getptr(c); 368 delta = (sndbuf_getsize(b) + hwptr - old) % sndbuf_getsize(b); 369 sndbuf_sethwptr(b, hwptr); 370 371 if (c->direction == PCMDIR_PLAY) { 372 amt = min(delta, sndbuf_getready(b)); 373 amt -= amt % sndbuf_getalign(b); 374 if (amt > 0) 375 sndbuf_dispose(b, NULL, amt); 376 } else { 377 amt = min(delta, sndbuf_getfree(b)); 378 amt -= amt % sndbuf_getalign(b); 379 if (amt > 0) 380 sndbuf_acquire(b, NULL, amt); 381 } 382 if (snd_verbose > 3 && CHN_STARTED(c) && delta == 0) { 383 device_printf(c->dev, "WARNING: %s DMA completion " 384 "too fast/slow ! hwptr=%u, old=%u " 385 "delta=%u amt=%u ready=%u free=%u\n", 386 CHN_DIRSTR(c), hwptr, old, delta, amt, 387 sndbuf_getready(b), sndbuf_getfree(b)); 388 } 389 390 return delta; 391 } 392 393 static void 394 chn_wrfeed(struct pcm_channel *c) 395 { 396 struct snd_dbuf *b = c->bufhard; 397 struct snd_dbuf *bs = c->bufsoft; 398 unsigned int amt, want, wasfree; 399 400 CHN_LOCKASSERT(c); 401 402 if ((c->flags & CHN_F_MMAP) && !(c->flags & CHN_F_CLOSING)) 403 sndbuf_acquire(bs, NULL, sndbuf_getfree(bs)); 404 405 wasfree = sndbuf_getfree(b); 406 want = min(sndbuf_getsize(b), 407 imax(0, sndbuf_xbytes(sndbuf_getsize(bs), bs, b) - 408 sndbuf_getready(b))); 409 amt = min(wasfree, want); 410 if (amt > 0) 411 sndbuf_feed(bs, b, c, c->feeder, amt); 412 413 /* 414 * Possible xruns. There should be no empty space left in buffer. 415 */ 416 if (sndbuf_getready(b) < want) 417 c->xruns++; 418 419 if (sndbuf_getfree(b) < wasfree) 420 chn_wakeup(c); 421 } 422 423 #if 0 424 static void 425 chn_wrupdate(struct pcm_channel *c) 426 { 427 428 CHN_LOCKASSERT(c); 429 KASSERT(c->direction == PCMDIR_PLAY, ("%s(): bad channel", __func__)); 430 431 if ((c->flags & (CHN_F_MMAP | CHN_F_VIRTUAL)) || CHN_STOPPED(c)) 432 return; 433 chn_dmaupdate(c); 434 chn_wrfeed(c); 435 /* tell the driver we've updated the primary buffer */ 436 chn_trigger(c, PCMTRIG_EMLDMAWR); 437 } 438 #endif 439 440 static void 441 chn_wrintr(struct pcm_channel *c) 442 { 443 444 CHN_LOCKASSERT(c); 445 /* update pointers in primary buffer */ 446 chn_dmaupdate(c); 447 /* ...and feed from secondary to primary */ 448 chn_wrfeed(c); 449 /* tell the driver we've updated the primary buffer */ 450 chn_trigger(c, PCMTRIG_EMLDMAWR); 451 } 452 453 /* 454 * user write routine - uiomove data into secondary buffer, trigger if necessary 455 * if blocking, sleep, rinse and repeat. 456 * 457 * called externally, so must handle locking 458 */ 459 460 int 461 chn_write(struct pcm_channel *c, struct uio *buf) 462 { 463 struct snd_dbuf *bs = c->bufsoft; 464 void *off; 465 int ret, timeout, sz, t, p; 466 467 CHN_LOCKASSERT(c); 468 469 ret = 0; 470 timeout = chn_timeout * hz; 471 472 while (ret == 0 && buf->uio_resid > 0) { 473 sz = min(buf->uio_resid, sndbuf_getfree(bs)); 474 if (sz > 0) { 475 /* 476 * The following assumes that the free space in 477 * the buffer can never be less around the 478 * unlock-uiomove-lock sequence. 479 */ 480 while (ret == 0 && sz > 0) { 481 p = sndbuf_getfreeptr(bs); 482 t = min(sz, sndbuf_getsize(bs) - p); 483 off = sndbuf_getbufofs(bs, p); 484 CHN_UNLOCK(c); 485 ret = uiomove(off, t, buf); 486 CHN_LOCK(c); 487 sz -= t; 488 sndbuf_acquire(bs, NULL, t); 489 } 490 ret = 0; 491 if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) { 492 ret = chn_start(c, 0); 493 if (ret != 0) 494 c->flags |= CHN_F_DEAD; 495 } 496 } else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER)) { 497 /** 498 * @todo Evaluate whether EAGAIN is truly desirable. 499 * 4Front drivers behave like this, but I'm 500 * not sure if it at all violates the "write 501 * should be allowed to block" model. 502 * 503 * The idea is that, while set with CHN_F_NOTRIGGER, 504 * a channel isn't playing, *but* without this we 505 * end up with "interrupt timeout / channel dead". 506 */ 507 ret = EAGAIN; 508 } else { 509 ret = chn_sleep(c, timeout); 510 if (ret == EAGAIN) { 511 ret = EINVAL; 512 c->flags |= CHN_F_DEAD; 513 device_printf(c->dev, "%s(): %s: " 514 "play interrupt timeout, channel dead\n", 515 __func__, c->name); 516 } else if (ret == ERESTART || ret == EINTR) 517 c->flags |= CHN_F_ABORTING; 518 } 519 } 520 521 return (ret); 522 } 523 524 /* 525 * Feed new data from the read buffer. Can be called in the bottom half. 526 */ 527 static void 528 chn_rdfeed(struct pcm_channel *c) 529 { 530 struct snd_dbuf *b = c->bufhard; 531 struct snd_dbuf *bs = c->bufsoft; 532 unsigned int amt; 533 534 CHN_LOCKASSERT(c); 535 536 if (c->flags & CHN_F_MMAP) 537 sndbuf_dispose(bs, NULL, sndbuf_getready(bs)); 538 539 amt = sndbuf_getfree(bs); 540 if (amt > 0) 541 sndbuf_feed(b, bs, c, c->feeder, amt); 542 543 amt = sndbuf_getready(b); 544 if (amt > 0) { 545 c->xruns++; 546 sndbuf_dispose(b, NULL, amt); 547 } 548 549 if (sndbuf_getready(bs) > 0) 550 chn_wakeup(c); 551 } 552 553 #if 0 554 static void 555 chn_rdupdate(struct pcm_channel *c) 556 { 557 558 CHN_LOCKASSERT(c); 559 KASSERT(c->direction == PCMDIR_REC, ("chn_rdupdate on bad channel")); 560 561 if ((c->flags & (CHN_F_MMAP | CHN_F_VIRTUAL)) || CHN_STOPPED(c)) 562 return; 563 chn_trigger(c, PCMTRIG_EMLDMARD); 564 chn_dmaupdate(c); 565 chn_rdfeed(c); 566 } 567 #endif 568 569 /* read interrupt routine. Must be called with interrupts blocked. */ 570 static void 571 chn_rdintr(struct pcm_channel *c) 572 { 573 574 CHN_LOCKASSERT(c); 575 /* tell the driver to update the primary buffer if non-dma */ 576 chn_trigger(c, PCMTRIG_EMLDMARD); 577 /* update pointers in primary buffer */ 578 chn_dmaupdate(c); 579 /* ...and feed from primary to secondary */ 580 chn_rdfeed(c); 581 } 582 583 /* 584 * user read routine - trigger if necessary, uiomove data from secondary buffer 585 * if blocking, sleep, rinse and repeat. 586 * 587 * called externally, so must handle locking 588 */ 589 590 int 591 chn_read(struct pcm_channel *c, struct uio *buf) 592 { 593 struct snd_dbuf *bs = c->bufsoft; 594 void *off; 595 int ret, timeout, sz, t, p; 596 597 CHN_LOCKASSERT(c); 598 599 if (CHN_STOPPED(c) && !(c->flags & CHN_F_NOTRIGGER)) { 600 ret = chn_start(c, 0); 601 if (ret != 0) { 602 c->flags |= CHN_F_DEAD; 603 return (ret); 604 } 605 } 606 607 ret = 0; 608 timeout = chn_timeout * hz; 609 610 while (ret == 0 && buf->uio_resid > 0) { 611 sz = min(buf->uio_resid, sndbuf_getready(bs)); 612 if (sz > 0) { 613 /* 614 * The following assumes that the free space in 615 * the buffer can never be less around the 616 * unlock-uiomove-lock sequence. 617 */ 618 while (ret == 0 && sz > 0) { 619 p = sndbuf_getreadyptr(bs); 620 t = min(sz, sndbuf_getsize(bs) - p); 621 off = sndbuf_getbufofs(bs, p); 622 CHN_UNLOCK(c); 623 ret = uiomove(off, t, buf); 624 CHN_LOCK(c); 625 sz -= t; 626 sndbuf_dispose(bs, NULL, t); 627 } 628 ret = 0; 629 } else if (c->flags & (CHN_F_NBIO | CHN_F_NOTRIGGER)) 630 ret = EAGAIN; 631 else { 632 ret = chn_sleep(c, timeout); 633 if (ret == EAGAIN) { 634 ret = EINVAL; 635 c->flags |= CHN_F_DEAD; 636 device_printf(c->dev, "%s(): %s: " 637 "record interrupt timeout, channel dead\n", 638 __func__, c->name); 639 } else if (ret == ERESTART || ret == EINTR) 640 c->flags |= CHN_F_ABORTING; 641 } 642 } 643 644 return (ret); 645 } 646 647 void 648 chn_intr_locked(struct pcm_channel *c) 649 { 650 651 CHN_LOCKASSERT(c); 652 653 c->interrupts++; 654 655 if (c->direction == PCMDIR_PLAY) 656 chn_wrintr(c); 657 else 658 chn_rdintr(c); 659 } 660 661 void 662 chn_intr(struct pcm_channel *c) 663 { 664 665 if (CHN_LOCKOWNED(c)) { 666 chn_intr_locked(c); 667 return; 668 } 669 670 CHN_LOCK(c); 671 chn_intr_locked(c); 672 CHN_UNLOCK(c); 673 } 674 675 u_int32_t 676 chn_start(struct pcm_channel *c, int force) 677 { 678 u_int32_t i, j; 679 struct snd_dbuf *b = c->bufhard; 680 struct snd_dbuf *bs = c->bufsoft; 681 int err; 682 683 CHN_LOCKASSERT(c); 684 /* if we're running, or if we're prevented from triggering, bail */ 685 if (CHN_STARTED(c) || ((c->flags & CHN_F_NOTRIGGER) && !force)) 686 return (EINVAL); 687 688 err = 0; 689 690 if (force) { 691 i = 1; 692 j = 0; 693 } else { 694 if (c->direction == PCMDIR_REC) { 695 i = sndbuf_getfree(bs); 696 j = (i > 0) ? 1 : sndbuf_getready(b); 697 } else { 698 if (sndbuf_getfree(bs) == 0) { 699 i = 1; 700 j = 0; 701 } else { 702 struct snd_dbuf *pb; 703 704 pb = CHN_BUF_PARENT(c, b); 705 i = sndbuf_xbytes(sndbuf_getready(bs), bs, pb); 706 j = sndbuf_getalign(pb); 707 } 708 } 709 if (snd_verbose > 3 && CHN_EMPTY(c, children)) 710 device_printf(c->dev, "%s(): %s (%s) threshold " 711 "i=%d j=%d\n", __func__, CHN_DIRSTR(c), 712 (c->flags & CHN_F_VIRTUAL) ? "virtual" : 713 "hardware", i, j); 714 } 715 716 if (i >= j) { 717 c->flags |= CHN_F_TRIGGERED; 718 sndbuf_setrun(b, 1); 719 if (c->flags & CHN_F_CLOSING) 720 c->feedcount = 2; 721 else { 722 c->feedcount = 0; 723 c->interrupts = 0; 724 c->xruns = 0; 725 } 726 if (c->parentchannel == NULL) { 727 if (c->direction == PCMDIR_PLAY) 728 sndbuf_fillsilence_rl(b, 729 sndbuf_xbytes(sndbuf_getsize(bs), bs, b)); 730 if (snd_verbose > 3) 731 device_printf(c->dev, 732 "%s(): %s starting! (%s/%s) " 733 "(ready=%d force=%d i=%d j=%d " 734 "intrtimeout=%u latency=%dms)\n", 735 __func__, 736 (c->flags & CHN_F_HAS_VCHAN) ? 737 "VCHAN PARENT" : "HW", CHN_DIRSTR(c), 738 (c->flags & CHN_F_CLOSING) ? "closing" : 739 "running", 740 sndbuf_getready(b), 741 force, i, j, c->timeout, 742 (sndbuf_getsize(b) * 1000) / 743 (sndbuf_getalign(b) * sndbuf_getspd(b))); 744 } 745 err = chn_trigger(c, PCMTRIG_START); 746 } 747 748 return (err); 749 } 750 751 void 752 chn_resetbuf(struct pcm_channel *c) 753 { 754 struct snd_dbuf *b = c->bufhard; 755 struct snd_dbuf *bs = c->bufsoft; 756 757 c->blocks = 0; 758 sndbuf_reset(b); 759 sndbuf_reset(bs); 760 } 761 762 /* 763 * chn_sync waits until the space in the given channel goes above 764 * a threshold. The threshold is checked against fl or rl respectively. 765 * Assume that the condition can become true, do not check here... 766 */ 767 int 768 chn_sync(struct pcm_channel *c, int threshold) 769 { 770 struct snd_dbuf *b, *bs; 771 int ret, count, hcount, minflush, resid, residp, syncdelay, blksz; 772 u_int32_t cflag; 773 774 CHN_LOCKASSERT(c); 775 776 if (c->direction != PCMDIR_PLAY) 777 return (EINVAL); 778 779 bs = c->bufsoft; 780 781 if ((c->flags & (CHN_F_DEAD | CHN_F_ABORTING)) || 782 (threshold < 1 && sndbuf_getready(bs) < 1)) 783 return (0); 784 785 /* if we haven't yet started and nothing is buffered, else start*/ 786 if (CHN_STOPPED(c)) { 787 if (threshold > 0 || sndbuf_getready(bs) > 0) { 788 ret = chn_start(c, 1); 789 if (ret != 0) 790 return (ret); 791 } else 792 return (0); 793 } 794 795 b = CHN_BUF_PARENT(c, c->bufhard); 796 797 minflush = threshold + sndbuf_xbytes(sndbuf_getready(b), b, bs); 798 799 syncdelay = chn_syncdelay; 800 801 if (syncdelay < 0 && (threshold > 0 || sndbuf_getready(bs) > 0)) 802 minflush += sndbuf_xbytes(sndbuf_getsize(b), b, bs); 803 804 /* 805 * Append (0-1000) millisecond trailing buffer (if needed) 806 * for slower / high latency hardwares (notably USB audio) 807 * to avoid audible truncation. 808 */ 809 if (syncdelay > 0) 810 minflush += (sndbuf_getalign(bs) * sndbuf_getspd(bs) * 811 ((syncdelay > 1000) ? 1000 : syncdelay)) / 1000; 812 813 minflush -= minflush % sndbuf_getalign(bs); 814 815 if (minflush > 0) { 816 threshold = min(minflush, sndbuf_getfree(bs)); 817 sndbuf_clear(bs, threshold); 818 sndbuf_acquire(bs, NULL, threshold); 819 minflush -= threshold; 820 } 821 822 resid = sndbuf_getready(bs); 823 residp = resid; 824 blksz = sndbuf_getblksz(b); 825 if (blksz < 1) { 826 device_printf(c->dev, 827 "%s(): WARNING: blksz < 1 ! maxsize=%d [%d/%d/%d]\n", 828 __func__, sndbuf_getmaxsize(b), sndbuf_getsize(b), 829 sndbuf_getblksz(b), sndbuf_getblkcnt(b)); 830 if (sndbuf_getblkcnt(b) > 0) 831 blksz = sndbuf_getsize(b) / sndbuf_getblkcnt(b); 832 if (blksz < 1) 833 blksz = 1; 834 } 835 count = sndbuf_xbytes(minflush + resid, bs, b) / blksz; 836 hcount = count; 837 ret = 0; 838 839 if (snd_verbose > 3) 840 device_printf(c->dev, "%s(): [begin] timeout=%d count=%d " 841 "minflush=%d resid=%d\n", __func__, c->timeout, count, 842 minflush, resid); 843 844 cflag = c->flags & CHN_F_CLOSING; 845 c->flags |= CHN_F_CLOSING; 846 while (count > 0 && (resid > 0 || minflush > 0)) { 847 ret = chn_sleep(c, c->timeout); 848 if (ret == ERESTART || ret == EINTR) { 849 c->flags |= CHN_F_ABORTING; 850 break; 851 } else if (ret == 0 || ret == EAGAIN) { 852 resid = sndbuf_getready(bs); 853 if (resid == residp) { 854 --count; 855 if (snd_verbose > 3) 856 device_printf(c->dev, 857 "%s(): [stalled] timeout=%d " 858 "count=%d hcount=%d " 859 "resid=%d minflush=%d\n", 860 __func__, c->timeout, count, 861 hcount, resid, minflush); 862 } else if (resid < residp && count < hcount) { 863 ++count; 864 if (snd_verbose > 3) 865 device_printf(c->dev, 866 "%s((): [resume] timeout=%d " 867 "count=%d hcount=%d " 868 "resid=%d minflush=%d\n", 869 __func__, c->timeout, count, 870 hcount, resid, minflush); 871 } 872 if (minflush > 0 && sndbuf_getfree(bs) > 0) { 873 threshold = min(minflush, 874 sndbuf_getfree(bs)); 875 sndbuf_clear(bs, threshold); 876 sndbuf_acquire(bs, NULL, threshold); 877 resid = sndbuf_getready(bs); 878 minflush -= threshold; 879 } 880 residp = resid; 881 } else 882 break; 883 } 884 c->flags &= ~CHN_F_CLOSING; 885 c->flags |= cflag; 886 887 if (snd_verbose > 3) 888 device_printf(c->dev, 889 "%s(): timeout=%d count=%d hcount=%d resid=%d residp=%d " 890 "minflush=%d ret=%d\n", 891 __func__, c->timeout, count, hcount, resid, residp, 892 minflush, ret); 893 894 return (0); 895 } 896 897 /* called externally, handle locking */ 898 int 899 chn_poll(struct pcm_channel *c, int ev, struct thread *td) 900 { 901 struct snd_dbuf *bs = c->bufsoft; 902 int ret; 903 904 CHN_LOCKASSERT(c); 905 906 if (!(c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED))) { 907 ret = chn_start(c, 1); 908 if (ret != 0) 909 return (0); 910 } 911 912 ret = 0; 913 if (chn_polltrigger(c)) { 914 chn_pollreset(c); 915 ret = ev; 916 } else 917 selrecord(td, sndbuf_getsel(bs)); 918 919 return (ret); 920 } 921 922 /* 923 * chn_abort terminates a running dma transfer. it may sleep up to 200ms. 924 * it returns the number of bytes that have not been transferred. 925 * 926 * called from: dsp_close, dsp_ioctl, with channel locked 927 */ 928 int 929 chn_abort(struct pcm_channel *c) 930 { 931 int missing = 0; 932 struct snd_dbuf *b = c->bufhard; 933 struct snd_dbuf *bs = c->bufsoft; 934 935 CHN_LOCKASSERT(c); 936 if (CHN_STOPPED(c)) 937 return 0; 938 c->flags |= CHN_F_ABORTING; 939 940 c->flags &= ~CHN_F_TRIGGERED; 941 /* kill the channel */ 942 chn_trigger(c, PCMTRIG_ABORT); 943 sndbuf_setrun(b, 0); 944 if (!(c->flags & CHN_F_VIRTUAL)) 945 chn_dmaupdate(c); 946 missing = sndbuf_getready(bs); 947 948 c->flags &= ~CHN_F_ABORTING; 949 return missing; 950 } 951 952 /* 953 * this routine tries to flush the dma transfer. It is called 954 * on a close of a playback channel. 955 * first, if there is data in the buffer, but the dma has not yet 956 * begun, we need to start it. 957 * next, we wait for the play buffer to drain 958 * finally, we stop the dma. 959 * 960 * called from: dsp_close, not valid for record channels. 961 */ 962 963 int 964 chn_flush(struct pcm_channel *c) 965 { 966 struct snd_dbuf *b = c->bufhard; 967 968 CHN_LOCKASSERT(c); 969 KASSERT(c->direction == PCMDIR_PLAY, ("chn_flush on bad channel")); 970 DEB(printf("chn_flush: c->flags 0x%08x\n", c->flags)); 971 972 c->flags |= CHN_F_CLOSING; 973 chn_sync(c, 0); 974 c->flags &= ~CHN_F_TRIGGERED; 975 /* kill the channel */ 976 chn_trigger(c, PCMTRIG_ABORT); 977 sndbuf_setrun(b, 0); 978 979 c->flags &= ~CHN_F_CLOSING; 980 return 0; 981 } 982 983 int 984 snd_fmtvalid(uint32_t fmt, uint32_t *fmtlist) 985 { 986 int i; 987 988 for (i = 0; fmtlist[i] != 0; i++) { 989 if (fmt == fmtlist[i] || 990 ((fmt & AFMT_PASSTHROUGH) && 991 (AFMT_ENCODING(fmt) & fmtlist[i]))) 992 return (1); 993 } 994 995 return (0); 996 } 997 998 static const struct { 999 char *name, *alias1, *alias2; 1000 uint32_t afmt; 1001 } afmt_tab[] = { 1002 { "alaw", NULL, NULL, AFMT_A_LAW }, 1003 { "mulaw", NULL, NULL, AFMT_MU_LAW }, 1004 { "u8", "8", NULL, AFMT_U8 }, 1005 { "s8", NULL, NULL, AFMT_S8 }, 1006 #if BYTE_ORDER == LITTLE_ENDIAN 1007 { "s16le", "s16", "16", AFMT_S16_LE }, 1008 { "s16be", NULL, NULL, AFMT_S16_BE }, 1009 #else 1010 { "s16le", NULL, NULL, AFMT_S16_LE }, 1011 { "s16be", "s16", "16", AFMT_S16_BE }, 1012 #endif 1013 { "u16le", NULL, NULL, AFMT_U16_LE }, 1014 { "u16be", NULL, NULL, AFMT_U16_BE }, 1015 { "s24le", NULL, NULL, AFMT_S24_LE }, 1016 { "s24be", NULL, NULL, AFMT_S24_BE }, 1017 { "u24le", NULL, NULL, AFMT_U24_LE }, 1018 { "u24be", NULL, NULL, AFMT_U24_BE }, 1019 #if BYTE_ORDER == LITTLE_ENDIAN 1020 { "s32le", "s32", "32", AFMT_S32_LE }, 1021 { "s32be", NULL, NULL, AFMT_S32_BE }, 1022 #else 1023 { "s32le", NULL, NULL, AFMT_S32_LE }, 1024 { "s32be", "s32", "32", AFMT_S32_BE }, 1025 #endif 1026 { "u32le", NULL, NULL, AFMT_U32_LE }, 1027 { "u32be", NULL, NULL, AFMT_U32_BE }, 1028 { "ac3", NULL, NULL, AFMT_AC3 }, 1029 { NULL, NULL, NULL, 0 } 1030 }; 1031 1032 uint32_t 1033 snd_str2afmt(const char *req) 1034 { 1035 int ext; 1036 int ch; 1037 int i; 1038 char b1[8]; 1039 char b2[8]; 1040 1041 memset(b1, 0, sizeof(b1)); 1042 memset(b2, 0, sizeof(b2)); 1043 1044 i = sscanf(req, "%5[^:]:%6s", b1, b2); 1045 1046 if (i == 1) { 1047 if (strlen(req) != strlen(b1)) 1048 return (0); 1049 strlcpy(b2, "2.0", sizeof(b2)); 1050 } else if (i == 2) { 1051 if (strlen(req) != (strlen(b1) + 1 + strlen(b2))) 1052 return (0); 1053 } else 1054 return (0); 1055 1056 i = sscanf(b2, "%d.%d", &ch, &ext); 1057 1058 if (i == 0) { 1059 if (strcasecmp(b2, "mono") == 0) { 1060 ch = 1; 1061 ext = 0; 1062 } else if (strcasecmp(b2, "stereo") == 0) { 1063 ch = 2; 1064 ext = 0; 1065 } else if (strcasecmp(b2, "quad") == 0) { 1066 ch = 4; 1067 ext = 0; 1068 } else 1069 return (0); 1070 } else if (i == 1) { 1071 if (ch < 1 || ch > AFMT_CHANNEL_MAX) 1072 return (0); 1073 ext = 0; 1074 } else if (i == 2) { 1075 if (ext < 0 || ext > AFMT_EXTCHANNEL_MAX) 1076 return (0); 1077 if (ch < 1 || (ch + ext) > AFMT_CHANNEL_MAX) 1078 return (0); 1079 } else 1080 return (0); 1081 1082 for (i = 0; afmt_tab[i].name != NULL; i++) { 1083 if (strcasecmp(afmt_tab[i].name, b1) != 0) { 1084 if (afmt_tab[i].alias1 == NULL) 1085 continue; 1086 if (strcasecmp(afmt_tab[i].alias1, b1) != 0) { 1087 if (afmt_tab[i].alias2 == NULL) 1088 continue; 1089 if (strcasecmp(afmt_tab[i].alias2, b1) != 0) 1090 continue; 1091 } 1092 } 1093 /* found a match */ 1094 return (SND_FORMAT(afmt_tab[i].afmt, ch + ext, ext)); 1095 } 1096 /* not a valid format */ 1097 return (0); 1098 } 1099 1100 uint32_t 1101 snd_afmt2str(uint32_t afmt, char *buf, size_t len) 1102 { 1103 uint32_t enc; 1104 uint32_t ext; 1105 uint32_t ch; 1106 int i; 1107 1108 if (buf == NULL || len < AFMTSTR_LEN) 1109 return (0); 1110 1111 memset(buf, 0, len); 1112 1113 enc = AFMT_ENCODING(afmt); 1114 ch = AFMT_CHANNEL(afmt); 1115 ext = AFMT_EXTCHANNEL(afmt); 1116 /* check there is at least one channel */ 1117 if (ch <= ext) 1118 return (0); 1119 for (i = 0; afmt_tab[i].name != NULL; i++) { 1120 if (enc != afmt_tab[i].afmt) 1121 continue; 1122 /* found a match */ 1123 snprintf(buf, len, "%s:%d.%d", 1124 afmt_tab[i].name, ch - ext, ext); 1125 return (SND_FORMAT(enc, ch, ext)); 1126 } 1127 return (0); 1128 } 1129 1130 int 1131 chn_reset(struct pcm_channel *c, uint32_t fmt, uint32_t spd) 1132 { 1133 int r; 1134 1135 CHN_LOCKASSERT(c); 1136 c->feedcount = 0; 1137 c->flags &= CHN_F_RESET; 1138 c->interrupts = 0; 1139 c->timeout = 1; 1140 c->xruns = 0; 1141 1142 c->flags |= (pcm_getflags(c->dev) & SD_F_BITPERFECT) ? 1143 CHN_F_BITPERFECT : 0; 1144 1145 r = CHANNEL_RESET(c->methods, c->devinfo); 1146 if (r == 0 && fmt != 0 && spd != 0) { 1147 r = chn_setparam(c, fmt, spd); 1148 fmt = 0; 1149 spd = 0; 1150 } 1151 if (r == 0 && fmt != 0) 1152 r = chn_setformat(c, fmt); 1153 if (r == 0 && spd != 0) 1154 r = chn_setspeed(c, spd); 1155 if (r == 0) 1156 r = chn_setlatency(c, chn_latency); 1157 if (r == 0) { 1158 chn_resetbuf(c); 1159 r = CHANNEL_RESETDONE(c->methods, c->devinfo); 1160 } 1161 return r; 1162 } 1163 1164 int 1165 chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction) 1166 { 1167 struct feeder_class *fc; 1168 struct snd_dbuf *b, *bs; 1169 int i, ret; 1170 1171 if (chn_timeout < CHN_TIMEOUT_MIN || chn_timeout > CHN_TIMEOUT_MAX) 1172 chn_timeout = CHN_TIMEOUT; 1173 1174 chn_lockinit(c, dir); 1175 1176 b = NULL; 1177 bs = NULL; 1178 CHN_INIT(c, children); 1179 CHN_INIT(c, children.busy); 1180 c->devinfo = NULL; 1181 c->feeder = NULL; 1182 c->latency = -1; 1183 c->timeout = 1; 1184 1185 ret = ENOMEM; 1186 b = sndbuf_create(c->dev, c->name, "primary", c); 1187 if (b == NULL) 1188 goto out; 1189 bs = sndbuf_create(c->dev, c->name, "secondary", c); 1190 if (bs == NULL) 1191 goto out; 1192 1193 CHN_LOCK(c); 1194 1195 ret = EINVAL; 1196 fc = feeder_getclass(NULL); 1197 if (fc == NULL) 1198 goto out; 1199 if (chn_addfeeder(c, fc, NULL)) 1200 goto out; 1201 1202 /* 1203 * XXX - sndbuf_setup() & sndbuf_resize() expect to be called 1204 * with the channel unlocked because they are also called 1205 * from driver methods that don't know about locking 1206 */ 1207 CHN_UNLOCK(c); 1208 sndbuf_setup(bs, NULL, 0); 1209 CHN_LOCK(c); 1210 c->bufhard = b; 1211 c->bufsoft = bs; 1212 c->flags = 0; 1213 c->feederflags = 0; 1214 c->sm = NULL; 1215 c->format = SND_FORMAT(AFMT_U8, 1, 0); 1216 c->speed = DSP_DEFAULT_SPEED; 1217 1218 c->matrix = *feeder_matrix_id_map(SND_CHN_MATRIX_1_0); 1219 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1220 1221 for (i = 0; i < SND_CHN_T_MAX; i++) { 1222 c->volume[SND_VOL_C_MASTER][i] = SND_VOL_0DB_MASTER; 1223 } 1224 1225 c->volume[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB] = SND_VOL_0DB_MASTER; 1226 c->volume[SND_VOL_C_PCM][SND_CHN_T_VOL_0DB] = chn_vol_0db_pcm; 1227 1228 chn_vpc_reset(c, SND_VOL_C_PCM, 1); 1229 1230 ret = ENODEV; 1231 CHN_UNLOCK(c); /* XXX - Unlock for CHANNEL_INIT() malloc() call */ 1232 c->devinfo = CHANNEL_INIT(c->methods, devinfo, b, c, direction); 1233 CHN_LOCK(c); 1234 if (c->devinfo == NULL) 1235 goto out; 1236 1237 ret = ENOMEM; 1238 if ((sndbuf_getsize(b) == 0) && ((c->flags & CHN_F_VIRTUAL) == 0)) 1239 goto out; 1240 1241 ret = 0; 1242 c->direction = direction; 1243 1244 sndbuf_setfmt(b, c->format); 1245 sndbuf_setspd(b, c->speed); 1246 sndbuf_setfmt(bs, c->format); 1247 sndbuf_setspd(bs, c->speed); 1248 1249 /** 1250 * @todo Should this be moved somewhere else? The primary buffer 1251 * is allocated by the driver or via DMA map setup, and tmpbuf 1252 * seems to only come into existence in sndbuf_resize(). 1253 */ 1254 if (c->direction == PCMDIR_PLAY) { 1255 bs->sl = sndbuf_getmaxsize(bs); 1256 bs->shadbuf = malloc(bs->sl, M_DEVBUF, M_NOWAIT); 1257 if (bs->shadbuf == NULL) { 1258 ret = ENOMEM; 1259 goto out; 1260 } 1261 } 1262 1263 out: 1264 CHN_UNLOCK(c); 1265 if (ret) { 1266 if (c->devinfo) { 1267 if (CHANNEL_FREE(c->methods, c->devinfo)) 1268 sndbuf_free(b); 1269 } 1270 if (bs) 1271 sndbuf_destroy(bs); 1272 if (b) 1273 sndbuf_destroy(b); 1274 CHN_LOCK(c); 1275 c->flags |= CHN_F_DEAD; 1276 chn_lockdestroy(c); 1277 1278 return ret; 1279 } 1280 1281 return 0; 1282 } 1283 1284 int 1285 chn_kill(struct pcm_channel *c) 1286 { 1287 struct snd_dbuf *b = c->bufhard; 1288 struct snd_dbuf *bs = c->bufsoft; 1289 1290 if (CHN_STARTED(c)) { 1291 CHN_LOCK(c); 1292 chn_trigger(c, PCMTRIG_ABORT); 1293 CHN_UNLOCK(c); 1294 } 1295 while (chn_removefeeder(c) == 0) 1296 ; 1297 if (CHANNEL_FREE(c->methods, c->devinfo)) 1298 sndbuf_free(b); 1299 sndbuf_destroy(bs); 1300 sndbuf_destroy(b); 1301 CHN_LOCK(c); 1302 c->flags |= CHN_F_DEAD; 1303 chn_lockdestroy(c); 1304 1305 return (0); 1306 } 1307 1308 /* XXX Obsolete. Use *_matrix() variant instead. */ 1309 int 1310 chn_setvolume(struct pcm_channel *c, int left, int right) 1311 { 1312 int ret; 1313 1314 ret = chn_setvolume_matrix(c, SND_VOL_C_MASTER, SND_CHN_T_FL, left); 1315 ret |= chn_setvolume_matrix(c, SND_VOL_C_MASTER, SND_CHN_T_FR, 1316 right) << 8; 1317 1318 return (ret); 1319 } 1320 1321 int 1322 chn_setvolume_multi(struct pcm_channel *c, int vc, int left, int right, 1323 int center) 1324 { 1325 int i, ret; 1326 1327 ret = 0; 1328 1329 for (i = 0; i < SND_CHN_T_MAX; i++) { 1330 if ((1 << i) & SND_CHN_LEFT_MASK) 1331 ret |= chn_setvolume_matrix(c, vc, i, left); 1332 else if ((1 << i) & SND_CHN_RIGHT_MASK) 1333 ret |= chn_setvolume_matrix(c, vc, i, right) << 8; 1334 else 1335 ret |= chn_setvolume_matrix(c, vc, i, center) << 16; 1336 } 1337 1338 return (ret); 1339 } 1340 1341 int 1342 chn_setvolume_matrix(struct pcm_channel *c, int vc, int vt, int val) 1343 { 1344 int i; 1345 1346 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1347 (vc == SND_VOL_C_MASTER || (vc & 1)) && 1348 (vt == SND_CHN_T_VOL_0DB || (vt >= SND_CHN_T_BEGIN && 1349 vt <= SND_CHN_T_END)) && (vt != SND_CHN_T_VOL_0DB || 1350 (val >= SND_VOL_0DB_MIN && val <= SND_VOL_0DB_MAX)), 1351 ("%s(): invalid volume matrix c=%p vc=%d vt=%d val=%d", 1352 __func__, c, vc, vt, val)); 1353 CHN_LOCKASSERT(c); 1354 1355 if (val < 0) 1356 val = 0; 1357 if (val > 100) 1358 val = 100; 1359 1360 c->volume[vc][vt] = val; 1361 1362 /* 1363 * Do relative calculation here and store it into class + 1 1364 * to ease the job of feeder_volume. 1365 */ 1366 if (vc == SND_VOL_C_MASTER) { 1367 for (vc = SND_VOL_C_BEGIN; vc <= SND_VOL_C_END; 1368 vc += SND_VOL_C_STEP) 1369 c->volume[SND_VOL_C_VAL(vc)][vt] = 1370 SND_VOL_CALC_VAL(c->volume, vc, vt); 1371 } else if (vc & 1) { 1372 if (vt == SND_CHN_T_VOL_0DB) 1373 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 1374 i += SND_CHN_T_STEP) { 1375 c->volume[SND_VOL_C_VAL(vc)][i] = 1376 SND_VOL_CALC_VAL(c->volume, vc, i); 1377 } 1378 else 1379 c->volume[SND_VOL_C_VAL(vc)][vt] = 1380 SND_VOL_CALC_VAL(c->volume, vc, vt); 1381 } 1382 1383 return (val); 1384 } 1385 1386 int 1387 chn_getvolume_matrix(struct pcm_channel *c, int vc, int vt) 1388 { 1389 KASSERT(c != NULL && vc >= SND_VOL_C_MASTER && vc < SND_VOL_C_MAX && 1390 (vt == SND_CHN_T_VOL_0DB || 1391 (vt >= SND_CHN_T_BEGIN && vt <= SND_CHN_T_END)), 1392 ("%s(): invalid volume matrix c=%p vc=%d vt=%d", 1393 __func__, c, vc, vt)); 1394 CHN_LOCKASSERT(c); 1395 1396 return (c->volume[vc][vt]); 1397 } 1398 1399 struct pcmchan_matrix * 1400 chn_getmatrix(struct pcm_channel *c) 1401 { 1402 1403 KASSERT(c != NULL, ("%s(): NULL channel", __func__)); 1404 CHN_LOCKASSERT(c); 1405 1406 if (!(c->format & AFMT_CONVERTIBLE)) 1407 return (NULL); 1408 1409 return (&c->matrix); 1410 } 1411 1412 int 1413 chn_setmatrix(struct pcm_channel *c, struct pcmchan_matrix *m) 1414 { 1415 1416 KASSERT(c != NULL && m != NULL, 1417 ("%s(): NULL channel or matrix", __func__)); 1418 CHN_LOCKASSERT(c); 1419 1420 if (!(c->format & AFMT_CONVERTIBLE)) 1421 return (EINVAL); 1422 1423 c->matrix = *m; 1424 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 1425 1426 return (chn_setformat(c, SND_FORMAT(c->format, m->channels, m->ext))); 1427 } 1428 1429 /* 1430 * XXX chn_oss_* exists for the sake of compatibility. 1431 */ 1432 int 1433 chn_oss_getorder(struct pcm_channel *c, unsigned long long *map) 1434 { 1435 1436 KASSERT(c != NULL && map != NULL, 1437 ("%s(): NULL channel or map", __func__)); 1438 CHN_LOCKASSERT(c); 1439 1440 if (!(c->format & AFMT_CONVERTIBLE)) 1441 return (EINVAL); 1442 1443 return (feeder_matrix_oss_get_channel_order(&c->matrix, map)); 1444 } 1445 1446 int 1447 chn_oss_setorder(struct pcm_channel *c, unsigned long long *map) 1448 { 1449 struct pcmchan_matrix m; 1450 int ret; 1451 1452 KASSERT(c != NULL && map != NULL, 1453 ("%s(): NULL channel or map", __func__)); 1454 CHN_LOCKASSERT(c); 1455 1456 if (!(c->format & AFMT_CONVERTIBLE)) 1457 return (EINVAL); 1458 1459 m = c->matrix; 1460 ret = feeder_matrix_oss_set_channel_order(&m, map); 1461 if (ret != 0) 1462 return (ret); 1463 1464 return (chn_setmatrix(c, &m)); 1465 } 1466 1467 #define SND_CHN_OSS_FRONT (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR) 1468 #define SND_CHN_OSS_SURR (SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR) 1469 #define SND_CHN_OSS_CENTER_LFE (SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF) 1470 #define SND_CHN_OSS_REAR (SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR) 1471 1472 int 1473 chn_oss_getmask(struct pcm_channel *c, uint32_t *retmask) 1474 { 1475 struct pcmchan_matrix *m; 1476 struct pcmchan_caps *caps; 1477 uint32_t i, format; 1478 1479 KASSERT(c != NULL && retmask != NULL, 1480 ("%s(): NULL channel or retmask", __func__)); 1481 CHN_LOCKASSERT(c); 1482 1483 caps = chn_getcaps(c); 1484 if (caps == NULL || caps->fmtlist == NULL) 1485 return (ENODEV); 1486 1487 for (i = 0; caps->fmtlist[i] != 0; i++) { 1488 format = caps->fmtlist[i]; 1489 if (!(format & AFMT_CONVERTIBLE)) { 1490 *retmask |= DSP_BIND_SPDIF; 1491 continue; 1492 } 1493 m = CHANNEL_GETMATRIX(c->methods, c->devinfo, format); 1494 if (m == NULL) 1495 continue; 1496 if (m->mask & SND_CHN_OSS_FRONT) 1497 *retmask |= DSP_BIND_FRONT; 1498 if (m->mask & SND_CHN_OSS_SURR) 1499 *retmask |= DSP_BIND_SURR; 1500 if (m->mask & SND_CHN_OSS_CENTER_LFE) 1501 *retmask |= DSP_BIND_CENTER_LFE; 1502 if (m->mask & SND_CHN_OSS_REAR) 1503 *retmask |= DSP_BIND_REAR; 1504 } 1505 1506 /* report software-supported binding mask */ 1507 if (!CHN_BITPERFECT(c) && report_soft_matrix) 1508 *retmask |= DSP_BIND_FRONT | DSP_BIND_SURR | 1509 DSP_BIND_CENTER_LFE | DSP_BIND_REAR; 1510 1511 return (0); 1512 } 1513 1514 void 1515 chn_vpc_reset(struct pcm_channel *c, int vc, int force) 1516 { 1517 int i; 1518 1519 KASSERT(c != NULL && vc >= SND_VOL_C_BEGIN && vc <= SND_VOL_C_END, 1520 ("%s(): invalid reset c=%p vc=%d", __func__, c, vc)); 1521 CHN_LOCKASSERT(c); 1522 1523 if (force == 0 && chn_vpc_autoreset == 0) 1524 return; 1525 1526 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; i += SND_CHN_T_STEP) 1527 CHN_SETVOLUME(c, vc, i, c->volume[vc][SND_CHN_T_VOL_0DB]); 1528 } 1529 1530 static u_int32_t 1531 round_pow2(u_int32_t v) 1532 { 1533 u_int32_t ret; 1534 1535 if (v < 2) 1536 v = 2; 1537 ret = 0; 1538 while (v >> ret) 1539 ret++; 1540 ret = 1 << (ret - 1); 1541 while (ret < v) 1542 ret <<= 1; 1543 return ret; 1544 } 1545 1546 static u_int32_t 1547 round_blksz(u_int32_t v, int round) 1548 { 1549 u_int32_t ret, tmp; 1550 1551 if (round < 1) 1552 round = 1; 1553 1554 ret = min(round_pow2(v), CHN_2NDBUFMAXSIZE >> 1); 1555 1556 if (ret > v && (ret >> 1) > 0 && (ret >> 1) >= ((v * 3) >> 2)) 1557 ret >>= 1; 1558 1559 tmp = ret - (ret % round); 1560 while (tmp < 16 || tmp < round) { 1561 ret <<= 1; 1562 tmp = ret - (ret % round); 1563 } 1564 1565 return ret; 1566 } 1567 1568 /* 1569 * 4Front call it DSP Policy, while we call it "Latency Profile". The idea 1570 * is to keep 2nd buffer short so that it doesn't cause long queue during 1571 * buffer transfer. 1572 * 1573 * Latency reference table for 48khz stereo 16bit: (PLAY) 1574 * 1575 * +---------+------------+-----------+------------+ 1576 * | Latency | Blockcount | Blocksize | Buffersize | 1577 * +---------+------------+-----------+------------+ 1578 * | 0 | 2 | 64 | 128 | 1579 * +---------+------------+-----------+------------+ 1580 * | 1 | 4 | 128 | 512 | 1581 * +---------+------------+-----------+------------+ 1582 * | 2 | 8 | 512 | 4096 | 1583 * +---------+------------+-----------+------------+ 1584 * | 3 | 16 | 512 | 8192 | 1585 * +---------+------------+-----------+------------+ 1586 * | 4 | 32 | 512 | 16384 | 1587 * +---------+------------+-----------+------------+ 1588 * | 5 | 32 | 1024 | 32768 | 1589 * +---------+------------+-----------+------------+ 1590 * | 6 | 16 | 2048 | 32768 | 1591 * +---------+------------+-----------+------------+ 1592 * | 7 | 8 | 4096 | 32768 | 1593 * +---------+------------+-----------+------------+ 1594 * | 8 | 4 | 8192 | 32768 | 1595 * +---------+------------+-----------+------------+ 1596 * | 9 | 2 | 16384 | 32768 | 1597 * +---------+------------+-----------+------------+ 1598 * | 10 | 2 | 32768 | 65536 | 1599 * +---------+------------+-----------+------------+ 1600 * 1601 * Recording need a different reference table. All we care is 1602 * gobbling up everything within reasonable buffering threshold. 1603 * 1604 * Latency reference table for 48khz stereo 16bit: (REC) 1605 * 1606 * +---------+------------+-----------+------------+ 1607 * | Latency | Blockcount | Blocksize | Buffersize | 1608 * +---------+------------+-----------+------------+ 1609 * | 0 | 512 | 32 | 16384 | 1610 * +---------+------------+-----------+------------+ 1611 * | 1 | 256 | 64 | 16384 | 1612 * +---------+------------+-----------+------------+ 1613 * | 2 | 128 | 128 | 16384 | 1614 * +---------+------------+-----------+------------+ 1615 * | 3 | 64 | 256 | 16384 | 1616 * +---------+------------+-----------+------------+ 1617 * | 4 | 32 | 512 | 16384 | 1618 * +---------+------------+-----------+------------+ 1619 * | 5 | 32 | 1024 | 32768 | 1620 * +---------+------------+-----------+------------+ 1621 * | 6 | 16 | 2048 | 32768 | 1622 * +---------+------------+-----------+------------+ 1623 * | 7 | 8 | 4096 | 32768 | 1624 * +---------+------------+-----------+------------+ 1625 * | 8 | 4 | 8192 | 32768 | 1626 * +---------+------------+-----------+------------+ 1627 * | 9 | 2 | 16384 | 32768 | 1628 * +---------+------------+-----------+------------+ 1629 * | 10 | 2 | 32768 | 65536 | 1630 * +---------+------------+-----------+------------+ 1631 * 1632 * Calculations for other data rate are entirely based on these reference 1633 * tables. For normal operation, Latency 5 seems give the best, well 1634 * balanced performance for typical workload. Anything below 5 will 1635 * eat up CPU to keep up with increasing context switches because of 1636 * shorter buffer space and usually require the application to handle it 1637 * aggresively through possibly real time programming technique. 1638 * 1639 */ 1640 #define CHN_LATENCY_PBLKCNT_REF \ 1641 {{1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}, \ 1642 {1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 1}} 1643 #define CHN_LATENCY_PBUFSZ_REF \ 1644 {{7, 9, 12, 13, 14, 15, 15, 15, 15, 15, 16}, \ 1645 {11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 17}} 1646 1647 #define CHN_LATENCY_RBLKCNT_REF \ 1648 {{9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}, \ 1649 {9, 8, 7, 6, 5, 5, 4, 3, 2, 1, 1}} 1650 #define CHN_LATENCY_RBUFSZ_REF \ 1651 {{14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16}, \ 1652 {15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 17}} 1653 1654 #define CHN_LATENCY_DATA_REF 192000 /* 48khz stereo 16bit ~ 48000 x 2 x 2 */ 1655 1656 static int 1657 chn_calclatency(int dir, int latency, int bps, u_int32_t datarate, 1658 u_int32_t max, int *rblksz, int *rblkcnt) 1659 { 1660 static int pblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1661 CHN_LATENCY_PBLKCNT_REF; 1662 static int pbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1663 CHN_LATENCY_PBUFSZ_REF; 1664 static int rblkcnts[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1665 CHN_LATENCY_RBLKCNT_REF; 1666 static int rbufszs[CHN_LATENCY_PROFILE_MAX + 1][CHN_LATENCY_MAX + 1] = 1667 CHN_LATENCY_RBUFSZ_REF; 1668 u_int32_t bufsz; 1669 int lprofile, blksz, blkcnt; 1670 1671 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX || 1672 bps < 1 || datarate < 1 || 1673 !(dir == PCMDIR_PLAY || dir == PCMDIR_REC)) { 1674 if (rblksz != NULL) 1675 *rblksz = CHN_2NDBUFMAXSIZE >> 1; 1676 if (rblkcnt != NULL) 1677 *rblkcnt = 2; 1678 printf("%s(): FAILED dir=%d latency=%d bps=%d " 1679 "datarate=%u max=%u\n", 1680 __func__, dir, latency, bps, datarate, max); 1681 return CHN_2NDBUFMAXSIZE; 1682 } 1683 1684 lprofile = chn_latency_profile; 1685 1686 if (dir == PCMDIR_PLAY) { 1687 blkcnt = pblkcnts[lprofile][latency]; 1688 bufsz = pbufszs[lprofile][latency]; 1689 } else { 1690 blkcnt = rblkcnts[lprofile][latency]; 1691 bufsz = rbufszs[lprofile][latency]; 1692 } 1693 1694 bufsz = round_pow2(snd_xbytes(1 << bufsz, CHN_LATENCY_DATA_REF, 1695 datarate)); 1696 if (bufsz > max) 1697 bufsz = max; 1698 blksz = round_blksz(bufsz >> blkcnt, bps); 1699 1700 if (rblksz != NULL) 1701 *rblksz = blksz; 1702 if (rblkcnt != NULL) 1703 *rblkcnt = 1 << blkcnt; 1704 1705 return blksz << blkcnt; 1706 } 1707 1708 static int 1709 chn_resizebuf(struct pcm_channel *c, int latency, 1710 int blkcnt, int blksz) 1711 { 1712 struct snd_dbuf *b, *bs, *pb; 1713 int sblksz, sblkcnt, hblksz, hblkcnt, limit = 0, nsblksz, nsblkcnt; 1714 int ret; 1715 1716 CHN_LOCKASSERT(c); 1717 1718 if ((c->flags & (CHN_F_MMAP | CHN_F_TRIGGERED)) || 1719 !(c->direction == PCMDIR_PLAY || c->direction == PCMDIR_REC)) 1720 return EINVAL; 1721 1722 if (latency == -1) { 1723 c->latency = -1; 1724 latency = chn_latency; 1725 } else if (latency == -2) { 1726 latency = c->latency; 1727 if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1728 latency = chn_latency; 1729 } else if (latency < CHN_LATENCY_MIN || latency > CHN_LATENCY_MAX) 1730 return EINVAL; 1731 else { 1732 c->latency = latency; 1733 } 1734 1735 bs = c->bufsoft; 1736 b = c->bufhard; 1737 1738 if (!(blksz == 0 || blkcnt == -1) && 1739 (blksz < 16 || blksz < sndbuf_getalign(bs) || blkcnt < 2 || 1740 (blksz * blkcnt) > CHN_2NDBUFMAXSIZE)) 1741 return EINVAL; 1742 1743 chn_calclatency(c->direction, latency, sndbuf_getalign(bs), 1744 sndbuf_getalign(bs) * sndbuf_getspd(bs), CHN_2NDBUFMAXSIZE, 1745 &sblksz, &sblkcnt); 1746 1747 if (blksz == 0 || blkcnt == -1) { 1748 if (blkcnt == -1) 1749 c->flags &= ~CHN_F_HAS_SIZE; 1750 if (c->flags & CHN_F_HAS_SIZE) { 1751 blksz = sndbuf_getblksz(bs); 1752 blkcnt = sndbuf_getblkcnt(bs); 1753 } 1754 } else 1755 c->flags |= CHN_F_HAS_SIZE; 1756 1757 if (c->flags & CHN_F_HAS_SIZE) { 1758 /* 1759 * The application has requested their own blksz/blkcnt. 1760 * Just obey with it, and let them toast alone. We can 1761 * clamp it to the nearest latency profile, but that would 1762 * defeat the purpose of having custom control. The least 1763 * we can do is round it to the nearest ^2 and align it. 1764 */ 1765 sblksz = round_blksz(blksz, sndbuf_getalign(bs)); 1766 sblkcnt = round_pow2(blkcnt); 1767 } 1768 1769 if (c->parentchannel != NULL) { 1770 pb = c->parentchannel->bufsoft; 1771 CHN_UNLOCK(c); 1772 CHN_LOCK(c->parentchannel); 1773 chn_notify(c->parentchannel, CHN_N_BLOCKSIZE); 1774 CHN_UNLOCK(c->parentchannel); 1775 CHN_LOCK(c); 1776 if (c->direction == PCMDIR_PLAY) { 1777 limit = (pb != NULL) ? 1778 sndbuf_xbytes(sndbuf_getsize(pb), pb, bs) : 0; 1779 } else { 1780 limit = (pb != NULL) ? 1781 sndbuf_xbytes(sndbuf_getblksz(pb), pb, bs) * 2 : 0; 1782 } 1783 } else { 1784 hblkcnt = 2; 1785 if (c->flags & CHN_F_HAS_SIZE) { 1786 hblksz = round_blksz(sndbuf_xbytes(sblksz, bs, b), 1787 sndbuf_getalign(b)); 1788 hblkcnt = round_pow2(sndbuf_getblkcnt(bs)); 1789 } else 1790 chn_calclatency(c->direction, latency, 1791 sndbuf_getalign(b), 1792 sndbuf_getalign(b) * sndbuf_getspd(b), 1793 CHN_2NDBUFMAXSIZE, &hblksz, &hblkcnt); 1794 1795 if ((hblksz << 1) > sndbuf_getmaxsize(b)) 1796 hblksz = round_blksz(sndbuf_getmaxsize(b) >> 1, 1797 sndbuf_getalign(b)); 1798 1799 while ((hblksz * hblkcnt) > sndbuf_getmaxsize(b)) { 1800 if (hblkcnt < 4) 1801 hblksz >>= 1; 1802 else 1803 hblkcnt >>= 1; 1804 } 1805 1806 hblksz -= hblksz % sndbuf_getalign(b); 1807 1808 #if 0 1809 hblksz = sndbuf_getmaxsize(b) >> 1; 1810 hblksz -= hblksz % sndbuf_getalign(b); 1811 hblkcnt = 2; 1812 #endif 1813 1814 CHN_UNLOCK(c); 1815 if (chn_usefrags == 0 || 1816 CHANNEL_SETFRAGMENTS(c->methods, c->devinfo, 1817 hblksz, hblkcnt) != 0) 1818 sndbuf_setblksz(b, CHANNEL_SETBLOCKSIZE(c->methods, 1819 c->devinfo, hblksz)); 1820 CHN_LOCK(c); 1821 1822 if (!CHN_EMPTY(c, children)) { 1823 nsblksz = round_blksz( 1824 sndbuf_xbytes(sndbuf_getblksz(b), b, bs), 1825 sndbuf_getalign(bs)); 1826 nsblkcnt = sndbuf_getblkcnt(b); 1827 if (c->direction == PCMDIR_PLAY) { 1828 do { 1829 nsblkcnt--; 1830 } while (nsblkcnt >= 2 && 1831 nsblksz * nsblkcnt >= sblksz * sblkcnt); 1832 nsblkcnt++; 1833 } 1834 sblksz = nsblksz; 1835 sblkcnt = nsblkcnt; 1836 limit = 0; 1837 } else 1838 limit = sndbuf_xbytes(sndbuf_getblksz(b), b, bs) * 2; 1839 } 1840 1841 if (limit > CHN_2NDBUFMAXSIZE) 1842 limit = CHN_2NDBUFMAXSIZE; 1843 1844 #if 0 1845 while (limit > 0 && (sblksz * sblkcnt) > limit) { 1846 if (sblkcnt < 4) 1847 break; 1848 sblkcnt >>= 1; 1849 } 1850 #endif 1851 1852 while ((sblksz * sblkcnt) < limit) 1853 sblkcnt <<= 1; 1854 1855 while ((sblksz * sblkcnt) > CHN_2NDBUFMAXSIZE) { 1856 if (sblkcnt < 4) 1857 sblksz >>= 1; 1858 else 1859 sblkcnt >>= 1; 1860 } 1861 1862 sblksz -= sblksz % sndbuf_getalign(bs); 1863 1864 if (sndbuf_getblkcnt(bs) != sblkcnt || sndbuf_getblksz(bs) != sblksz || 1865 sndbuf_getsize(bs) != (sblkcnt * sblksz)) { 1866 ret = sndbuf_remalloc(bs, sblkcnt, sblksz); 1867 if (ret != 0) { 1868 device_printf(c->dev, "%s(): Failed: %d %d\n", 1869 __func__, sblkcnt, sblksz); 1870 return ret; 1871 } 1872 } 1873 1874 /* 1875 * Interrupt timeout 1876 */ 1877 c->timeout = ((u_int64_t)hz * sndbuf_getsize(bs)) / 1878 ((u_int64_t)sndbuf_getspd(bs) * sndbuf_getalign(bs)); 1879 if (c->parentchannel != NULL) 1880 c->timeout = min(c->timeout, c->parentchannel->timeout); 1881 if (c->timeout < 1) 1882 c->timeout = 1; 1883 1884 /* 1885 * OSSv4 docs: "By default OSS will set the low water level equal 1886 * to the fragment size which is optimal in most cases." 1887 */ 1888 c->lw = sndbuf_getblksz(bs); 1889 chn_resetbuf(c); 1890 1891 if (snd_verbose > 3) 1892 device_printf(c->dev, "%s(): %s (%s) timeout=%u " 1893 "b[%d/%d/%d] bs[%d/%d/%d] limit=%d\n", 1894 __func__, CHN_DIRSTR(c), 1895 (c->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware", 1896 c->timeout, 1897 sndbuf_getsize(b), sndbuf_getblksz(b), 1898 sndbuf_getblkcnt(b), 1899 sndbuf_getsize(bs), sndbuf_getblksz(bs), 1900 sndbuf_getblkcnt(bs), limit); 1901 1902 return 0; 1903 } 1904 1905 int 1906 chn_setlatency(struct pcm_channel *c, int latency) 1907 { 1908 CHN_LOCKASSERT(c); 1909 /* Destroy blksz/blkcnt, enforce latency profile. */ 1910 return chn_resizebuf(c, latency, -1, 0); 1911 } 1912 1913 int 1914 chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz) 1915 { 1916 CHN_LOCKASSERT(c); 1917 /* Destroy latency profile, enforce blksz/blkcnt */ 1918 return chn_resizebuf(c, -1, blkcnt, blksz); 1919 } 1920 1921 int 1922 chn_setparam(struct pcm_channel *c, uint32_t format, uint32_t speed) 1923 { 1924 struct pcmchan_caps *caps; 1925 uint32_t hwspeed, delta; 1926 int ret; 1927 1928 CHN_LOCKASSERT(c); 1929 1930 if (speed < 1 || format == 0 || CHN_STARTED(c)) 1931 return (EINVAL); 1932 1933 c->format = format; 1934 c->speed = speed; 1935 1936 caps = chn_getcaps(c); 1937 1938 hwspeed = speed; 1939 RANGE(hwspeed, caps->minspeed, caps->maxspeed); 1940 1941 sndbuf_setspd(c->bufhard, CHANNEL_SETSPEED(c->methods, c->devinfo, 1942 hwspeed)); 1943 hwspeed = sndbuf_getspd(c->bufhard); 1944 1945 delta = (hwspeed > speed) ? (hwspeed - speed) : (speed - hwspeed); 1946 1947 if (delta <= feeder_rate_round) 1948 c->speed = hwspeed; 1949 1950 ret = feeder_chain(c); 1951 1952 if (ret == 0) 1953 ret = CHANNEL_SETFORMAT(c->methods, c->devinfo, 1954 sndbuf_getfmt(c->bufhard)); 1955 1956 if (ret == 0) 1957 ret = chn_resizebuf(c, -2, 0, 0); 1958 1959 return (ret); 1960 } 1961 1962 int 1963 chn_setspeed(struct pcm_channel *c, uint32_t speed) 1964 { 1965 uint32_t oldformat, oldspeed, format; 1966 int ret; 1967 1968 #if 0 1969 /* XXX force 48k */ 1970 if (c->format & AFMT_PASSTHROUGH) 1971 speed = AFMT_PASSTHROUGH_RATE; 1972 #endif 1973 1974 oldformat = c->format; 1975 oldspeed = c->speed; 1976 format = oldformat; 1977 1978 ret = chn_setparam(c, format, speed); 1979 if (ret != 0) { 1980 if (snd_verbose > 3) 1981 device_printf(c->dev, 1982 "%s(): Setting speed %d failed, " 1983 "falling back to %d\n", 1984 __func__, speed, oldspeed); 1985 chn_setparam(c, c->format, oldspeed); 1986 } 1987 1988 return (ret); 1989 } 1990 1991 int 1992 chn_setformat(struct pcm_channel *c, uint32_t format) 1993 { 1994 uint32_t oldformat, oldspeed, speed; 1995 int ret; 1996 1997 /* XXX force stereo */ 1998 if ((format & AFMT_PASSTHROUGH) && AFMT_CHANNEL(format) < 2) { 1999 format = SND_FORMAT(format, AFMT_PASSTHROUGH_CHANNEL, 2000 AFMT_PASSTHROUGH_EXTCHANNEL); 2001 } 2002 2003 oldformat = c->format; 2004 oldspeed = c->speed; 2005 speed = oldspeed; 2006 2007 ret = chn_setparam(c, format, speed); 2008 if (ret != 0) { 2009 if (snd_verbose > 3) 2010 device_printf(c->dev, 2011 "%s(): Format change 0x%08x failed, " 2012 "falling back to 0x%08x\n", 2013 __func__, format, oldformat); 2014 chn_setparam(c, oldformat, oldspeed); 2015 } 2016 2017 return (ret); 2018 } 2019 2020 void 2021 chn_syncstate(struct pcm_channel *c) 2022 { 2023 struct snddev_info *d; 2024 struct snd_mixer *m; 2025 2026 d = (c != NULL) ? c->parentsnddev : NULL; 2027 m = (d != NULL && d->mixer_dev != NULL) ? d->mixer_dev->si_drv1 : 2028 NULL; 2029 2030 if (d == NULL || m == NULL) 2031 return; 2032 2033 CHN_LOCKASSERT(c); 2034 2035 if (c->feederflags & (1 << FEEDER_VOLUME)) { 2036 uint32_t parent; 2037 int vol, pvol, left, right, center; 2038 2039 if (c->direction == PCMDIR_PLAY && 2040 (d->flags & SD_F_SOFTPCMVOL)) { 2041 /* CHN_UNLOCK(c); */ 2042 vol = mix_get(m, SOUND_MIXER_PCM); 2043 parent = mix_getparent(m, SOUND_MIXER_PCM); 2044 if (parent != SOUND_MIXER_NONE) 2045 pvol = mix_get(m, parent); 2046 else 2047 pvol = 100 | (100 << 8); 2048 /* CHN_LOCK(c); */ 2049 } else { 2050 vol = 100 | (100 << 8); 2051 pvol = vol; 2052 } 2053 2054 if (vol == -1) { 2055 device_printf(c->dev, 2056 "Soft PCM Volume: Failed to read pcm " 2057 "default value\n"); 2058 vol = 100 | (100 << 8); 2059 } 2060 2061 if (pvol == -1) { 2062 device_printf(c->dev, 2063 "Soft PCM Volume: Failed to read parent " 2064 "default value\n"); 2065 pvol = 100 | (100 << 8); 2066 } 2067 2068 left = ((vol & 0x7f) * (pvol & 0x7f)) / 100; 2069 right = (((vol >> 8) & 0x7f) * ((pvol >> 8) & 0x7f)) / 100; 2070 center = (left + right) >> 1; 2071 2072 chn_setvolume_multi(c, SND_VOL_C_MASTER, left, right, center); 2073 } 2074 2075 if (c->feederflags & (1 << FEEDER_EQ)) { 2076 struct pcm_feeder *f; 2077 int treble, bass, state; 2078 2079 /* CHN_UNLOCK(c); */ 2080 treble = mix_get(m, SOUND_MIXER_TREBLE); 2081 bass = mix_get(m, SOUND_MIXER_BASS); 2082 /* CHN_LOCK(c); */ 2083 2084 if (treble == -1) 2085 treble = 50; 2086 else 2087 treble = ((treble & 0x7f) + 2088 ((treble >> 8) & 0x7f)) >> 1; 2089 2090 if (bass == -1) 2091 bass = 50; 2092 else 2093 bass = ((bass & 0x7f) + ((bass >> 8) & 0x7f)) >> 1; 2094 2095 f = chn_findfeeder(c, FEEDER_EQ); 2096 if (f != NULL) { 2097 if (FEEDER_SET(f, FEEDEQ_TREBLE, treble) != 0) 2098 device_printf(c->dev, 2099 "EQ: Failed to set treble -- %d\n", 2100 treble); 2101 if (FEEDER_SET(f, FEEDEQ_BASS, bass) != 0) 2102 device_printf(c->dev, 2103 "EQ: Failed to set bass -- %d\n", 2104 bass); 2105 if (FEEDER_SET(f, FEEDEQ_PREAMP, d->eqpreamp) != 0) 2106 device_printf(c->dev, 2107 "EQ: Failed to set preamp -- %d\n", 2108 d->eqpreamp); 2109 if (d->flags & SD_F_EQ_BYPASSED) 2110 state = FEEDEQ_BYPASS; 2111 else if (d->flags & SD_F_EQ_ENABLED) 2112 state = FEEDEQ_ENABLE; 2113 else 2114 state = FEEDEQ_DISABLE; 2115 if (FEEDER_SET(f, FEEDEQ_STATE, state) != 0) 2116 device_printf(c->dev, 2117 "EQ: Failed to set state -- %d\n", state); 2118 } 2119 } 2120 } 2121 2122 int 2123 chn_trigger(struct pcm_channel *c, int go) 2124 { 2125 #ifdef DEV_ISA 2126 struct snd_dbuf *b = c->bufhard; 2127 #endif 2128 struct snddev_info *d = c->parentsnddev; 2129 int ret; 2130 2131 CHN_LOCKASSERT(c); 2132 #ifdef DEV_ISA 2133 if (SND_DMA(b) && (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)) 2134 sndbuf_dmabounce(b); 2135 #endif 2136 if (!PCMTRIG_COMMON(go)) 2137 return (CHANNEL_TRIGGER(c->methods, c->devinfo, go)); 2138 2139 if (go == c->trigger) 2140 return (0); 2141 2142 ret = CHANNEL_TRIGGER(c->methods, c->devinfo, go); 2143 if (ret != 0) 2144 return (ret); 2145 2146 switch (go) { 2147 case PCMTRIG_START: 2148 if (snd_verbose > 3) 2149 device_printf(c->dev, 2150 "%s() %s: calling go=0x%08x , " 2151 "prev=0x%08x\n", __func__, c->name, go, 2152 c->trigger); 2153 if (c->trigger != PCMTRIG_START) { 2154 c->trigger = go; 2155 CHN_UNLOCK(c); 2156 PCM_LOCK(d); 2157 CHN_INSERT_HEAD(d, c, channels.pcm.busy); 2158 PCM_UNLOCK(d); 2159 CHN_LOCK(c); 2160 chn_syncstate(c); 2161 } 2162 break; 2163 case PCMTRIG_STOP: 2164 case PCMTRIG_ABORT: 2165 if (snd_verbose > 3) 2166 device_printf(c->dev, 2167 "%s() %s: calling go=0x%08x , " 2168 "prev=0x%08x\n", __func__, c->name, go, 2169 c->trigger); 2170 if (c->trigger == PCMTRIG_START) { 2171 c->trigger = go; 2172 CHN_UNLOCK(c); 2173 PCM_LOCK(d); 2174 CHN_REMOVE(d, c, channels.pcm.busy); 2175 PCM_UNLOCK(d); 2176 CHN_LOCK(c); 2177 } 2178 break; 2179 default: 2180 break; 2181 } 2182 2183 return (0); 2184 } 2185 2186 /** 2187 * @brief Queries sound driver for sample-aligned hardware buffer pointer index 2188 * 2189 * This function obtains the hardware pointer location, then aligns it to 2190 * the current bytes-per-sample value before returning. (E.g., a channel 2191 * running in 16 bit stereo mode would require 4 bytes per sample, so a 2192 * hwptr value ranging from 32-35 would be returned as 32.) 2193 * 2194 * @param c PCM channel context 2195 * @returns sample-aligned hardware buffer pointer index 2196 */ 2197 int 2198 chn_getptr(struct pcm_channel *c) 2199 { 2200 int hwptr; 2201 2202 CHN_LOCKASSERT(c); 2203 hwptr = (CHN_STARTED(c)) ? CHANNEL_GETPTR(c->methods, c->devinfo) : 0; 2204 return (hwptr - (hwptr % sndbuf_getalign(c->bufhard))); 2205 } 2206 2207 struct pcmchan_caps * 2208 chn_getcaps(struct pcm_channel *c) 2209 { 2210 CHN_LOCKASSERT(c); 2211 return CHANNEL_GETCAPS(c->methods, c->devinfo); 2212 } 2213 2214 u_int32_t 2215 chn_getformats(struct pcm_channel *c) 2216 { 2217 u_int32_t *fmtlist, fmts; 2218 int i; 2219 2220 fmtlist = chn_getcaps(c)->fmtlist; 2221 fmts = 0; 2222 for (i = 0; fmtlist[i]; i++) 2223 fmts |= fmtlist[i]; 2224 2225 /* report software-supported formats */ 2226 if (!CHN_BITPERFECT(c) && report_soft_formats) 2227 fmts |= AFMT_CONVERTIBLE; 2228 2229 return (AFMT_ENCODING(fmts)); 2230 } 2231 2232 int 2233 chn_notify(struct pcm_channel *c, u_int32_t flags) 2234 { 2235 struct pcm_channel *ch; 2236 struct pcmchan_caps *caps; 2237 uint32_t bestformat, bestspeed, besthwformat, *vchanformat, *vchanrate; 2238 uint32_t vpflags; 2239 int dirty, err, run, nrun; 2240 2241 CHN_LOCKASSERT(c); 2242 2243 if (CHN_EMPTY(c, children)) 2244 return (ENODEV); 2245 2246 err = 0; 2247 2248 /* 2249 * If the hwchan is running, we can't change its rate, format or 2250 * blocksize 2251 */ 2252 run = (CHN_STARTED(c)) ? 1 : 0; 2253 if (run) 2254 flags &= CHN_N_VOLUME | CHN_N_TRIGGER; 2255 2256 if (flags & CHN_N_RATE) { 2257 /* 2258 * XXX I'll make good use of this someday. 2259 * However this is currently being superseded by 2260 * the availability of CHN_F_VCHAN_DYNAMIC. 2261 */ 2262 } 2263 2264 if (flags & CHN_N_FORMAT) { 2265 /* 2266 * XXX I'll make good use of this someday. 2267 * However this is currently being superseded by 2268 * the availability of CHN_F_VCHAN_DYNAMIC. 2269 */ 2270 } 2271 2272 if (flags & CHN_N_VOLUME) { 2273 /* 2274 * XXX I'll make good use of this someday, though 2275 * soft volume control is currently pretty much 2276 * integrated. 2277 */ 2278 } 2279 2280 if (flags & CHN_N_BLOCKSIZE) { 2281 /* 2282 * Set to default latency profile 2283 */ 2284 chn_setlatency(c, chn_latency); 2285 } 2286 2287 if ((flags & CHN_N_TRIGGER) && !(c->flags & CHN_F_VCHAN_DYNAMIC)) { 2288 nrun = CHN_EMPTY(c, children.busy) ? 0 : 1; 2289 if (nrun && !run) 2290 err = chn_start(c, 1); 2291 if (!nrun && run) 2292 chn_abort(c); 2293 flags &= ~CHN_N_TRIGGER; 2294 } 2295 2296 if (flags & CHN_N_TRIGGER) { 2297 if (c->direction == PCMDIR_PLAY) { 2298 vchanformat = &c->parentsnddev->pvchanformat; 2299 vchanrate = &c->parentsnddev->pvchanrate; 2300 } else { 2301 vchanformat = &c->parentsnddev->rvchanformat; 2302 vchanrate = &c->parentsnddev->rvchanrate; 2303 } 2304 2305 /* Dynamic Virtual Channel */ 2306 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE)) { 2307 bestformat = *vchanformat; 2308 bestspeed = *vchanrate; 2309 } else { 2310 bestformat = 0; 2311 bestspeed = 0; 2312 } 2313 2314 besthwformat = 0; 2315 nrun = 0; 2316 caps = chn_getcaps(c); 2317 dirty = 0; 2318 vpflags = 0; 2319 2320 CHN_FOREACH(ch, c, children.busy) { 2321 CHN_LOCK(ch); 2322 if ((ch->format & AFMT_PASSTHROUGH) && 2323 snd_fmtvalid(ch->format, caps->fmtlist)) { 2324 bestformat = ch->format; 2325 bestspeed = ch->speed; 2326 CHN_UNLOCK(ch); 2327 vpflags = CHN_F_PASSTHROUGH; 2328 nrun++; 2329 break; 2330 } 2331 if ((ch->flags & CHN_F_EXCLUSIVE) && vpflags == 0) { 2332 if (c->flags & CHN_F_VCHAN_ADAPTIVE) { 2333 bestspeed = ch->speed; 2334 RANGE(bestspeed, caps->minspeed, 2335 caps->maxspeed); 2336 besthwformat = snd_fmtbest(ch->format, 2337 caps->fmtlist); 2338 if (besthwformat != 0) 2339 bestformat = besthwformat; 2340 } 2341 CHN_UNLOCK(ch); 2342 vpflags = CHN_F_EXCLUSIVE; 2343 nrun++; 2344 continue; 2345 } 2346 if (!(c->flags & CHN_F_VCHAN_ADAPTIVE) || 2347 vpflags != 0) { 2348 CHN_UNLOCK(ch); 2349 nrun++; 2350 continue; 2351 } 2352 if (ch->speed > bestspeed) { 2353 bestspeed = ch->speed; 2354 RANGE(bestspeed, caps->minspeed, 2355 caps->maxspeed); 2356 } 2357 besthwformat = snd_fmtbest(ch->format, caps->fmtlist); 2358 if (!(besthwformat & AFMT_VCHAN)) { 2359 CHN_UNLOCK(ch); 2360 nrun++; 2361 continue; 2362 } 2363 if (AFMT_CHANNEL(besthwformat) > 2364 AFMT_CHANNEL(bestformat)) 2365 bestformat = besthwformat; 2366 else if (AFMT_CHANNEL(besthwformat) == 2367 AFMT_CHANNEL(bestformat) && 2368 AFMT_BIT(besthwformat) > AFMT_BIT(bestformat)) 2369 bestformat = besthwformat; 2370 CHN_UNLOCK(ch); 2371 nrun++; 2372 } 2373 2374 if (bestformat == 0) 2375 bestformat = c->format; 2376 if (bestspeed == 0) 2377 bestspeed = c->speed; 2378 2379 if (bestformat != c->format || bestspeed != c->speed) 2380 dirty = 1; 2381 2382 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2383 c->flags |= vpflags; 2384 2385 if (nrun && !run) { 2386 if (dirty) { 2387 bestspeed = CHANNEL_SETSPEED(c->methods, 2388 c->devinfo, bestspeed); 2389 err = chn_reset(c, bestformat, bestspeed); 2390 } 2391 if (err == 0 && dirty) { 2392 CHN_FOREACH(ch, c, children.busy) { 2393 CHN_LOCK(ch); 2394 if (VCHAN_SYNC_REQUIRED(ch)) 2395 vchan_sync(ch); 2396 CHN_UNLOCK(ch); 2397 } 2398 } 2399 if (err == 0) { 2400 if (dirty) 2401 c->flags |= CHN_F_DIRTY; 2402 err = chn_start(c, 1); 2403 } 2404 } 2405 2406 if (nrun && run && dirty) { 2407 chn_abort(c); 2408 bestspeed = CHANNEL_SETSPEED(c->methods, c->devinfo, 2409 bestspeed); 2410 err = chn_reset(c, bestformat, bestspeed); 2411 if (err == 0) { 2412 CHN_FOREACH(ch, c, children.busy) { 2413 CHN_LOCK(ch); 2414 if (VCHAN_SYNC_REQUIRED(ch)) 2415 vchan_sync(ch); 2416 CHN_UNLOCK(ch); 2417 } 2418 } 2419 if (err == 0) { 2420 c->flags |= CHN_F_DIRTY; 2421 err = chn_start(c, 1); 2422 } 2423 } 2424 2425 if (err == 0 && !(bestformat & AFMT_PASSTHROUGH) && 2426 (bestformat & AFMT_VCHAN)) { 2427 *vchanformat = bestformat; 2428 *vchanrate = bestspeed; 2429 } 2430 2431 if (!nrun && run) { 2432 c->flags &= ~(CHN_F_PASSTHROUGH | CHN_F_EXCLUSIVE); 2433 bestformat = *vchanformat; 2434 bestspeed = *vchanrate; 2435 chn_abort(c); 2436 if (c->format != bestformat || c->speed != bestspeed) 2437 chn_reset(c, bestformat, bestspeed); 2438 } 2439 } 2440 2441 return (err); 2442 } 2443 2444 /** 2445 * @brief Fetch array of supported discrete sample rates 2446 * 2447 * Wrapper for CHANNEL_GETRATES. Please see channel_if.m:getrates() for 2448 * detailed information. 2449 * 2450 * @note If the operation isn't supported, this function will just return 0 2451 * (no rates in the array), and *rates will be set to NULL. Callers 2452 * should examine rates @b only if this function returns non-zero. 2453 * 2454 * @param c pcm channel to examine 2455 * @param rates pointer to array of integers; rate table will be recorded here 2456 * 2457 * @return number of rates in the array pointed to be @c rates 2458 */ 2459 int 2460 chn_getrates(struct pcm_channel *c, int **rates) 2461 { 2462 KASSERT(rates != NULL, ("rates is null")); 2463 CHN_LOCKASSERT(c); 2464 return CHANNEL_GETRATES(c->methods, c->devinfo, rates); 2465 } 2466 2467 /** 2468 * @brief Remove channel from a sync group, if there is one. 2469 * 2470 * This function is initially intended for the following conditions: 2471 * - Starting a syncgroup (@c SNDCTL_DSP_SYNCSTART ioctl) 2472 * - Closing a device. (A channel can't be destroyed if it's still in use.) 2473 * 2474 * @note Before calling this function, the syncgroup list mutex must be 2475 * held. (Consider pcm_channel::sm protected by the SG list mutex 2476 * whether @c c is locked or not.) 2477 * 2478 * @param c channel device to be started or closed 2479 * @returns If this channel was the only member of a group, the group ID 2480 * is returned to the caller so that the caller can release it 2481 * via free_unr() after giving up the syncgroup lock. Else it 2482 * returns 0. 2483 */ 2484 int 2485 chn_syncdestroy(struct pcm_channel *c) 2486 { 2487 struct pcmchan_syncmember *sm; 2488 struct pcmchan_syncgroup *sg; 2489 int sg_id; 2490 2491 sg_id = 0; 2492 2493 PCM_SG_LOCKASSERT(MA_OWNED); 2494 2495 if (c->sm != NULL) { 2496 sm = c->sm; 2497 sg = sm->parent; 2498 c->sm = NULL; 2499 2500 KASSERT(sg != NULL, ("syncmember has null parent")); 2501 2502 SLIST_REMOVE(&sg->members, sm, pcmchan_syncmember, link); 2503 free(sm, M_DEVBUF); 2504 2505 if (SLIST_EMPTY(&sg->members)) { 2506 SLIST_REMOVE(&snd_pcm_syncgroups, sg, pcmchan_syncgroup, link); 2507 sg_id = sg->id; 2508 free(sg, M_DEVBUF); 2509 } 2510 } 2511 2512 return sg_id; 2513 } 2514 2515 #ifdef OSSV4_EXPERIMENT 2516 int 2517 chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak) 2518 { 2519 CHN_LOCKASSERT(c); 2520 return CHANNEL_GETPEAKS(c->methods, c->devinfo, lpeak, rpeak); 2521 } 2522 #endif
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