1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifdef HAVE_KERNEL_OPTION_HEADERS 30 #include "opt_snd.h" 31 #endif 32 33 #include <dev/sound/pcm/sound.h> 34 35 #include "feeder_if.h" 36 37 SND_DECLARE_FILE("$FreeBSD$"); 38 39 /* chain state */ 40 struct feeder_chain_state { 41 uint32_t afmt; /* audio format */ 42 uint32_t rate; /* sampling rate */ 43 struct pcmchan_matrix *matrix; /* matrix map */ 44 }; 45 46 /* 47 * chain descriptor that will be passed around from the beginning until the 48 * end of chain process. 49 */ 50 struct feeder_chain_desc { 51 struct feeder_chain_state origin; /* original state */ 52 struct feeder_chain_state current; /* current state */ 53 struct feeder_chain_state target; /* target state */ 54 struct pcm_feederdesc desc; /* feeder descriptor */ 55 uint32_t afmt_ne; /* preferred native endian */ 56 int mode; /* chain mode */ 57 int use_eq; /* need EQ? */ 58 int use_matrix; /* need channel matrixing? */ 59 int use_volume; /* need softpcmvol? */ 60 int dummy; /* dummy passthrough */ 61 int expensive; /* possibly expensive */ 62 }; 63 64 #define FEEDER_CHAIN_LEAN 0 65 #define FEEDER_CHAIN_16 1 66 #define FEEDER_CHAIN_32 2 67 #define FEEDER_CHAIN_MULTI 3 68 #define FEEDER_CHAIN_FULLMULTI 4 69 #define FEEDER_CHAIN_LAST 5 70 71 #if defined(SND_FEEDER_FULL_MULTIFORMAT) 72 #define FEEDER_CHAIN_DEFAULT FEEDER_CHAIN_FULLMULTI 73 #elif defined(SND_FEEDER_MULTIFORMAT) 74 #define FEEDER_CHAIN_DEFAULT FEEDER_CHAIN_MULTI 75 #else 76 #define FEEDER_CHAIN_DEFAULT FEEDER_CHAIN_LEAN 77 #endif 78 79 /* 80 * List of preferred formats that might be required during 81 * processing. It will be decided through snd_fmtbest(). 82 */ 83 84 /* 'Lean' mode, signed 16 or 32 bit native endian. */ 85 static uint32_t feeder_chain_formats_lean[] = { 86 AFMT_S16_NE, AFMT_S32_NE, 87 0 88 }; 89 90 /* Force everything to signed 16 bit native endian. */ 91 static uint32_t feeder_chain_formats_16[] = { 92 AFMT_S16_NE, 93 0 94 }; 95 96 /* Force everything to signed 32 bit native endian. */ 97 static uint32_t feeder_chain_formats_32[] = { 98 AFMT_S32_NE, 99 0 100 }; 101 102 /* Multiple choices, all except 8 bit. */ 103 static uint32_t feeder_chain_formats_multi[] = { 104 AFMT_S16_LE, AFMT_S16_BE, AFMT_U16_LE, AFMT_U16_BE, 105 AFMT_S24_LE, AFMT_S24_BE, AFMT_U24_LE, AFMT_U24_BE, 106 AFMT_S32_LE, AFMT_S32_BE, AFMT_U32_LE, AFMT_U32_BE, 107 0 108 }; 109 110 /* Everything that is convertible. */ 111 static uint32_t feeder_chain_formats_fullmulti[] = { 112 AFMT_S8, AFMT_U8, 113 AFMT_S16_LE, AFMT_S16_BE, AFMT_U16_LE, AFMT_U16_BE, 114 AFMT_S24_LE, AFMT_S24_BE, AFMT_U24_LE, AFMT_U24_BE, 115 AFMT_S32_LE, AFMT_S32_BE, AFMT_U32_LE, AFMT_U32_BE, 116 0 117 }; 118 119 static uint32_t *feeder_chain_formats[FEEDER_CHAIN_LAST] = { 120 [FEEDER_CHAIN_LEAN] = feeder_chain_formats_lean, 121 [FEEDER_CHAIN_16] = feeder_chain_formats_16, 122 [FEEDER_CHAIN_32] = feeder_chain_formats_32, 123 [FEEDER_CHAIN_MULTI] = feeder_chain_formats_multi, 124 [FEEDER_CHAIN_FULLMULTI] = feeder_chain_formats_fullmulti 125 }; 126 127 static int feeder_chain_mode = FEEDER_CHAIN_DEFAULT; 128 129 #if defined(_KERNEL) && defined(SND_DEBUG) && defined(SND_FEEDER_FULL_MULTIFORMAT) 130 SYSCTL_INT(_hw_snd, OID_AUTO, feeder_chain_mode, CTLFLAG_RWTUN, 131 &feeder_chain_mode, 0, 132 "feeder chain mode " 133 "(0=lean, 1=16bit, 2=32bit, 3=multiformat, 4=fullmultiformat)"); 134 #endif 135 136 /* 137 * feeder_build_format(): Chain any format converter. 138 */ 139 static int 140 feeder_build_format(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 141 { 142 struct feeder_class *fc; 143 struct pcm_feederdesc *desc; 144 int ret; 145 146 desc = &(cdesc->desc); 147 desc->type = FEEDER_FORMAT; 148 desc->in = 0; 149 desc->out = 0; 150 desc->flags = 0; 151 152 fc = feeder_getclass(desc); 153 if (fc == NULL) { 154 device_printf(c->dev, 155 "%s(): can't find feeder_format\n", __func__); 156 return (ENOTSUP); 157 } 158 159 desc->in = cdesc->current.afmt; 160 desc->out = cdesc->target.afmt; 161 162 ret = chn_addfeeder(c, fc, desc); 163 if (ret != 0) { 164 device_printf(c->dev, 165 "%s(): can't add feeder_format\n", __func__); 166 return (ret); 167 } 168 169 c->feederflags |= 1 << FEEDER_FORMAT; 170 171 cdesc->current.afmt = cdesc->target.afmt; 172 173 return (0); 174 } 175 176 /* 177 * feeder_build_formatne(): Chain format converter that suite best for native 178 * endian format. 179 */ 180 static int 181 feeder_build_formatne(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 182 { 183 struct feeder_chain_state otarget; 184 int ret; 185 186 if (cdesc->afmt_ne == 0 || 187 AFMT_ENCODING(cdesc->current.afmt) == cdesc->afmt_ne) 188 return (0); 189 190 otarget = cdesc->target; 191 cdesc->target = cdesc->current; 192 cdesc->target.afmt = SND_FORMAT(cdesc->afmt_ne, 193 cdesc->current.matrix->channels, cdesc->current.matrix->ext); 194 195 ret = feeder_build_format(c, cdesc); 196 if (ret != 0) 197 return (ret); 198 199 cdesc->target = otarget; 200 201 return (0); 202 } 203 204 /* 205 * feeder_build_rate(): Chain sample rate converter. 206 */ 207 static int 208 feeder_build_rate(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 209 { 210 struct feeder_class *fc; 211 struct pcm_feeder *f; 212 struct pcm_feederdesc *desc; 213 int ret; 214 215 ret = feeder_build_formatne(c, cdesc); 216 if (ret != 0) 217 return (ret); 218 219 desc = &(cdesc->desc); 220 desc->type = FEEDER_RATE; 221 desc->in = 0; 222 desc->out = 0; 223 desc->flags = 0; 224 225 fc = feeder_getclass(desc); 226 if (fc == NULL) { 227 device_printf(c->dev, 228 "%s(): can't find feeder_rate\n", __func__); 229 return (ENOTSUP); 230 } 231 232 desc->in = cdesc->current.afmt; 233 desc->out = desc->in; 234 235 ret = chn_addfeeder(c, fc, desc); 236 if (ret != 0) { 237 device_printf(c->dev, 238 "%s(): can't add feeder_rate\n", __func__); 239 return (ret); 240 } 241 242 f = c->feeder; 243 244 /* 245 * If in 'dummy' mode (possibly due to passthrough mode), set the 246 * conversion quality to the lowest possible (should be fastest) since 247 * listener won't be hearing anything. Theoretically we can just 248 * disable it, but that will cause weird runtime behaviour: 249 * application appear to play something that is either too fast or too 250 * slow. 251 */ 252 if (cdesc->dummy != 0) { 253 ret = FEEDER_SET(f, FEEDRATE_QUALITY, 0); 254 if (ret != 0) { 255 device_printf(c->dev, 256 "%s(): can't set resampling quality\n", __func__); 257 return (ret); 258 } 259 } 260 261 ret = FEEDER_SET(f, FEEDRATE_SRC, cdesc->current.rate); 262 if (ret != 0) { 263 device_printf(c->dev, 264 "%s(): can't set source rate\n", __func__); 265 return (ret); 266 } 267 268 ret = FEEDER_SET(f, FEEDRATE_DST, cdesc->target.rate); 269 if (ret != 0) { 270 device_printf(c->dev, 271 "%s(): can't set destination rate\n", __func__); 272 return (ret); 273 } 274 275 c->feederflags |= 1 << FEEDER_RATE; 276 277 cdesc->current.rate = cdesc->target.rate; 278 279 return (0); 280 } 281 282 /* 283 * feeder_build_matrix(): Chain channel matrixing converter. 284 */ 285 static int 286 feeder_build_matrix(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 287 { 288 struct feeder_class *fc; 289 struct pcm_feeder *f; 290 struct pcm_feederdesc *desc; 291 int ret; 292 293 ret = feeder_build_formatne(c, cdesc); 294 if (ret != 0) 295 return (ret); 296 297 desc = &(cdesc->desc); 298 desc->type = FEEDER_MATRIX; 299 desc->in = 0; 300 desc->out = 0; 301 desc->flags = 0; 302 303 fc = feeder_getclass(desc); 304 if (fc == NULL) { 305 device_printf(c->dev, 306 "%s(): can't find feeder_matrix\n", __func__); 307 return (ENOTSUP); 308 } 309 310 desc->in = cdesc->current.afmt; 311 desc->out = SND_FORMAT(cdesc->current.afmt, 312 cdesc->target.matrix->channels, cdesc->target.matrix->ext); 313 314 ret = chn_addfeeder(c, fc, desc); 315 if (ret != 0) { 316 device_printf(c->dev, 317 "%s(): can't add feeder_matrix\n", __func__); 318 return (ret); 319 } 320 321 f = c->feeder; 322 ret = feeder_matrix_setup(f, cdesc->current.matrix, 323 cdesc->target.matrix); 324 if (ret != 0) { 325 device_printf(c->dev, 326 "%s(): feeder_matrix_setup() failed\n", __func__); 327 return (ret); 328 } 329 330 c->feederflags |= 1 << FEEDER_MATRIX; 331 332 cdesc->current.afmt = desc->out; 333 cdesc->current.matrix = cdesc->target.matrix; 334 cdesc->use_matrix = 0; 335 336 return (0); 337 } 338 339 /* 340 * feeder_build_volume(): Chain soft volume. 341 */ 342 static int 343 feeder_build_volume(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 344 { 345 struct feeder_class *fc; 346 struct pcm_feeder *f; 347 struct pcm_feederdesc *desc; 348 int ret; 349 350 ret = feeder_build_formatne(c, cdesc); 351 if (ret != 0) 352 return (ret); 353 354 desc = &(cdesc->desc); 355 desc->type = FEEDER_VOLUME; 356 desc->in = 0; 357 desc->out = 0; 358 desc->flags = 0; 359 360 fc = feeder_getclass(desc); 361 if (fc == NULL) { 362 device_printf(c->dev, 363 "%s(): can't find feeder_volume\n", __func__); 364 return (ENOTSUP); 365 } 366 367 desc->in = cdesc->current.afmt; 368 desc->out = desc->in; 369 370 ret = chn_addfeeder(c, fc, desc); 371 if (ret != 0) { 372 device_printf(c->dev, 373 "%s(): can't add feeder_volume\n", __func__); 374 return (ret); 375 } 376 377 f = c->feeder; 378 379 /* 380 * If in 'dummy' mode (possibly due to passthrough mode), set BYPASS 381 * mode since listener won't be hearing anything. Theoretically we can 382 * just disable it, but that will confuse volume per channel mixer. 383 */ 384 if (cdesc->dummy != 0) { 385 ret = FEEDER_SET(f, FEEDVOLUME_STATE, FEEDVOLUME_BYPASS); 386 if (ret != 0) { 387 device_printf(c->dev, 388 "%s(): can't set volume bypass\n", __func__); 389 return (ret); 390 } 391 } 392 393 ret = feeder_volume_apply_matrix(f, cdesc->current.matrix); 394 if (ret != 0) { 395 device_printf(c->dev, 396 "%s(): feeder_volume_apply_matrix() failed\n", __func__); 397 return (ret); 398 } 399 400 c->feederflags |= 1 << FEEDER_VOLUME; 401 402 cdesc->use_volume = 0; 403 404 return (0); 405 } 406 407 /* 408 * feeder_build_eq(): Chain parametric software equalizer. 409 */ 410 static int 411 feeder_build_eq(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 412 { 413 struct feeder_class *fc; 414 struct pcm_feeder *f; 415 struct pcm_feederdesc *desc; 416 int ret; 417 418 ret = feeder_build_formatne(c, cdesc); 419 if (ret != 0) 420 return (ret); 421 422 desc = &(cdesc->desc); 423 desc->type = FEEDER_EQ; 424 desc->in = 0; 425 desc->out = 0; 426 desc->flags = 0; 427 428 fc = feeder_getclass(desc); 429 if (fc == NULL) { 430 device_printf(c->dev, 431 "%s(): can't find feeder_eq\n", __func__); 432 return (ENOTSUP); 433 } 434 435 desc->in = cdesc->current.afmt; 436 desc->out = desc->in; 437 438 ret = chn_addfeeder(c, fc, desc); 439 if (ret != 0) { 440 device_printf(c->dev, 441 "%s(): can't add feeder_eq\n", __func__); 442 return (ret); 443 } 444 445 f = c->feeder; 446 447 ret = FEEDER_SET(f, FEEDEQ_RATE, cdesc->current.rate); 448 if (ret != 0) { 449 device_printf(c->dev, 450 "%s(): can't set rate on feeder_eq\n", __func__); 451 return (ret); 452 } 453 454 c->feederflags |= 1 << FEEDER_EQ; 455 456 cdesc->use_eq = 0; 457 458 return (0); 459 } 460 461 /* 462 * feeder_build_root(): Chain root feeder, the top, father of all. 463 */ 464 static int 465 feeder_build_root(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 466 { 467 struct feeder_class *fc; 468 int ret; 469 470 fc = feeder_getclass(NULL); 471 if (fc == NULL) { 472 device_printf(c->dev, 473 "%s(): can't find feeder_root\n", __func__); 474 return (ENOTSUP); 475 } 476 477 ret = chn_addfeeder(c, fc, NULL); 478 if (ret != 0) { 479 device_printf(c->dev, 480 "%s(): can't add feeder_root\n", __func__); 481 return (ret); 482 } 483 484 c->feederflags |= 1 << FEEDER_ROOT; 485 486 c->feeder->desc->in = cdesc->current.afmt; 487 c->feeder->desc->out = cdesc->current.afmt; 488 489 return (0); 490 } 491 492 /* 493 * feeder_build_mixer(): Chain software mixer for virtual channels. 494 */ 495 static int 496 feeder_build_mixer(struct pcm_channel *c, struct feeder_chain_desc *cdesc) 497 { 498 struct feeder_class *fc; 499 struct pcm_feederdesc *desc; 500 int ret; 501 502 desc = &(cdesc->desc); 503 desc->type = FEEDER_MIXER; 504 desc->in = 0; 505 desc->out = 0; 506 desc->flags = 0; 507 508 fc = feeder_getclass(desc); 509 if (fc == NULL) { 510 device_printf(c->dev, 511 "%s(): can't find feeder_mixer\n", __func__); 512 return (ENOTSUP); 513 } 514 515 desc->in = cdesc->current.afmt; 516 desc->out = desc->in; 517 518 ret = chn_addfeeder(c, fc, desc); 519 if (ret != 0) { 520 device_printf(c->dev, 521 "%s(): can't add feeder_mixer\n", __func__); 522 return (ret); 523 } 524 525 c->feederflags |= 1 << FEEDER_MIXER; 526 527 return (0); 528 } 529 530 /* Macrosses to ease our job doing stuffs later. */ 531 #define FEEDER_BW(c, t) ((c)->t.matrix->channels * (c)->t.rate) 532 533 #define FEEDRATE_UP(c) ((c)->target.rate > (c)->current.rate) 534 #define FEEDRATE_DOWN(c) ((c)->target.rate < (c)->current.rate) 535 #define FEEDRATE_REQUIRED(c) (FEEDRATE_UP(c) || FEEDRATE_DOWN(c)) 536 537 #define FEEDMATRIX_UP(c) ((c)->target.matrix->channels > \ 538 (c)->current.matrix->channels) 539 #define FEEDMATRIX_DOWN(c) ((c)->target.matrix->channels < \ 540 (c)->current.matrix->channels) 541 #define FEEDMATRIX_REQUIRED(c) (FEEDMATRIX_UP(c) || \ 542 FEEDMATRIX_DOWN(c) || (c)->use_matrix != 0) 543 544 #define FEEDFORMAT_REQUIRED(c) (AFMT_ENCODING((c)->current.afmt) != \ 545 AFMT_ENCODING((c)->target.afmt)) 546 547 #define FEEDVOLUME_REQUIRED(c) ((c)->use_volume != 0) 548 549 #define FEEDEQ_VALIDRATE(c, t) (feeder_eq_validrate((c)->t.rate) != 0) 550 #define FEEDEQ_ECONOMY(c) (FEEDER_BW(c, current) < FEEDER_BW(c, target)) 551 #define FEEDEQ_REQUIRED(c) ((c)->use_eq != 0 && \ 552 FEEDEQ_VALIDRATE(c, current)) 553 554 #define FEEDFORMAT_NE_REQUIRED(c) \ 555 ((c)->afmt_ne != AFMT_S32_NE && \ 556 (((c)->mode == FEEDER_CHAIN_16 && \ 557 AFMT_ENCODING((c)->current.afmt) != AFMT_S16_NE) || \ 558 ((c)->mode == FEEDER_CHAIN_32 && \ 559 AFMT_ENCODING((c)->current.afmt) != AFMT_S32_NE) || \ 560 (c)->mode == FEEDER_CHAIN_FULLMULTI || \ 561 ((c)->mode == FEEDER_CHAIN_MULTI && \ 562 ((c)->current.afmt & AFMT_8BIT)) || \ 563 ((c)->mode == FEEDER_CHAIN_LEAN && \ 564 !((c)->current.afmt & (AFMT_S16_NE | AFMT_S32_NE))))) 565 566 static void 567 feeder_default_matrix(struct pcmchan_matrix *m, uint32_t fmt, int id) 568 { 569 int x; 570 571 memset(m, 0, sizeof(*m)); 572 573 m->id = id; 574 m->channels = AFMT_CHANNEL(fmt); 575 m->ext = AFMT_EXTCHANNEL(fmt); 576 for (x = 0; x != SND_CHN_T_MAX; x++) 577 m->offset[x] = -1; 578 } 579 580 int 581 feeder_chain(struct pcm_channel *c) 582 { 583 struct snddev_info *d; 584 struct pcmchan_caps *caps; 585 struct feeder_chain_desc cdesc; 586 struct pcmchan_matrix *hwmatrix, *softmatrix; 587 uint32_t hwfmt, softfmt; 588 int ret; 589 590 CHN_LOCKASSERT(c); 591 592 /* Remove everything first. */ 593 while (chn_removefeeder(c) == 0) 594 ; 595 596 KASSERT(c->feeder == NULL, ("feeder chain not empty")); 597 598 /* clear and populate chain descriptor. */ 599 bzero(&cdesc, sizeof(cdesc)); 600 601 switch (feeder_chain_mode) { 602 case FEEDER_CHAIN_LEAN: 603 case FEEDER_CHAIN_16: 604 case FEEDER_CHAIN_32: 605 #if defined(SND_FEEDER_MULTIFORMAT) || defined(SND_FEEDER_FULL_MULTIFORMAT) 606 case FEEDER_CHAIN_MULTI: 607 #endif 608 #if defined(SND_FEEDER_FULL_MULTIFORMAT) 609 case FEEDER_CHAIN_FULLMULTI: 610 #endif 611 break; 612 default: 613 feeder_chain_mode = FEEDER_CHAIN_DEFAULT; 614 break; 615 } 616 617 cdesc.mode = feeder_chain_mode; 618 cdesc.expensive = 1; /* XXX faster.. */ 619 620 #define VCHAN_PASSTHROUGH(c) (((c)->flags & (CHN_F_VIRTUAL | \ 621 CHN_F_PASSTHROUGH)) == \ 622 (CHN_F_VIRTUAL | CHN_F_PASSTHROUGH)) 623 624 /* Get the best possible hardware format. */ 625 if (VCHAN_PASSTHROUGH(c)) 626 hwfmt = c->parentchannel->format; 627 else { 628 caps = chn_getcaps(c); 629 if (caps == NULL || caps->fmtlist == NULL) { 630 device_printf(c->dev, 631 "%s(): failed to get channel caps\n", __func__); 632 return (ENODEV); 633 } 634 635 if ((c->format & AFMT_PASSTHROUGH) && 636 !snd_fmtvalid(c->format, caps->fmtlist)) 637 return (ENODEV); 638 639 hwfmt = snd_fmtbest(c->format, caps->fmtlist); 640 if (hwfmt == 0 || !snd_fmtvalid(hwfmt, caps->fmtlist)) { 641 device_printf(c->dev, 642 "%s(): invalid hardware format 0x%08x\n", 643 __func__, hwfmt); 644 { 645 int i; 646 for (i = 0; caps->fmtlist[i] != 0; i++) 647 printf("0x%08x\n", caps->fmtlist[i]); 648 printf("Req: 0x%08x\n", c->format); 649 } 650 return (ENODEV); 651 } 652 } 653 654 /* 655 * The 'hardware' possibly have different interpretation of channel 656 * matrixing, so get it first ..... 657 */ 658 hwmatrix = CHANNEL_GETMATRIX(c->methods, c->devinfo, hwfmt); 659 if (hwmatrix == NULL) { 660 /* setup a default matrix */ 661 hwmatrix = &c->matrix_scratch; 662 feeder_default_matrix(hwmatrix, hwfmt, 663 SND_CHN_MATRIX_UNKNOWN); 664 } 665 /* ..... and rebuild hwfmt. */ 666 hwfmt = SND_FORMAT(hwfmt, hwmatrix->channels, hwmatrix->ext); 667 668 /* Reset and rebuild default channel format/matrix map. */ 669 softfmt = c->format; 670 softmatrix = &c->matrix; 671 if (softmatrix->channels != AFMT_CHANNEL(softfmt) || 672 softmatrix->ext != AFMT_EXTCHANNEL(softfmt)) { 673 softmatrix = feeder_matrix_format_map(softfmt); 674 if (softmatrix == NULL) { 675 /* setup a default matrix */ 676 softmatrix = &c->matrix; 677 feeder_default_matrix(softmatrix, softfmt, 678 SND_CHN_MATRIX_PCMCHANNEL); 679 } else { 680 c->matrix = *softmatrix; 681 c->matrix.id = SND_CHN_MATRIX_PCMCHANNEL; 682 } 683 } 684 softfmt = SND_FORMAT(softfmt, softmatrix->channels, softmatrix->ext); 685 if (softfmt != c->format) 686 device_printf(c->dev, 687 "%s(): WARNING: %s Soft format 0x%08x -> 0x%08x\n", 688 __func__, CHN_DIRSTR(c), c->format, softfmt); 689 690 /* 691 * PLAY and REC are opposite. 692 */ 693 if (c->direction == PCMDIR_PLAY) { 694 cdesc.origin.afmt = softfmt; 695 cdesc.origin.matrix = softmatrix; 696 cdesc.origin.rate = c->speed; 697 cdesc.target.afmt = hwfmt; 698 cdesc.target.matrix = hwmatrix; 699 cdesc.target.rate = sndbuf_getspd(c->bufhard); 700 } else { 701 cdesc.origin.afmt = hwfmt; 702 cdesc.origin.matrix = hwmatrix; 703 cdesc.origin.rate = sndbuf_getspd(c->bufhard); 704 cdesc.target.afmt = softfmt; 705 cdesc.target.matrix = softmatrix; 706 cdesc.target.rate = c->speed; 707 } 708 709 d = c->parentsnddev; 710 711 /* 712 * If channel is in bitperfect or passthrough mode, make it appear 713 * that 'origin' and 'target' identical, skipping mostly chain 714 * procedures. 715 */ 716 if (CHN_BITPERFECT(c) || (c->format & AFMT_PASSTHROUGH)) { 717 if (c->direction == PCMDIR_PLAY) 718 cdesc.origin = cdesc.target; 719 else 720 cdesc.target = cdesc.origin; 721 c->format = cdesc.target.afmt; 722 c->speed = cdesc.target.rate; 723 } else { 724 /* hwfmt is not convertible, so 'dummy' it. */ 725 if (hwfmt & AFMT_PASSTHROUGH) 726 cdesc.dummy = 1; 727 728 if ((softfmt & AFMT_CONVERTIBLE) && 729 (((d->flags & SD_F_VPC) && !(c->flags & CHN_F_HAS_VCHAN)) || 730 (!(d->flags & SD_F_VPC) && (d->flags & SD_F_SOFTPCMVOL) && 731 !(c->flags & CHN_F_VIRTUAL)))) 732 cdesc.use_volume = 1; 733 734 if (feeder_matrix_compare(cdesc.origin.matrix, 735 cdesc.target.matrix) != 0) 736 cdesc.use_matrix = 1; 737 738 /* Soft EQ only applicable for PLAY. */ 739 if (cdesc.dummy == 0 && 740 c->direction == PCMDIR_PLAY && (d->flags & SD_F_EQ) && 741 (((d->flags & SD_F_EQ_PC) && 742 !(c->flags & CHN_F_HAS_VCHAN)) || 743 (!(d->flags & SD_F_EQ_PC) && !(c->flags & CHN_F_VIRTUAL)))) 744 cdesc.use_eq = 1; 745 746 if (FEEDFORMAT_NE_REQUIRED(&cdesc)) { 747 cdesc.afmt_ne = 748 (cdesc.dummy != 0) ? 749 snd_fmtbest(AFMT_ENCODING(softfmt), 750 feeder_chain_formats[cdesc.mode]) : 751 snd_fmtbest(AFMT_ENCODING(cdesc.target.afmt), 752 feeder_chain_formats[cdesc.mode]); 753 if (cdesc.afmt_ne == 0) { 754 device_printf(c->dev, 755 "%s(): snd_fmtbest failed!\n", __func__); 756 cdesc.afmt_ne = 757 (((cdesc.dummy != 0) ? softfmt : 758 cdesc.target.afmt) & 759 (AFMT_24BIT | AFMT_32BIT)) ? 760 AFMT_S32_NE : AFMT_S16_NE; 761 } 762 } 763 } 764 765 cdesc.current = cdesc.origin; 766 767 /* Build everything. */ 768 769 c->feederflags = 0; 770 771 #define FEEDER_BUILD(t) do { \ 772 ret = feeder_build_##t(c, &cdesc); \ 773 if (ret != 0) \ 774 return (ret); \ 775 } while (0) 776 777 if (!(c->flags & CHN_F_HAS_VCHAN) || c->direction == PCMDIR_REC) 778 FEEDER_BUILD(root); 779 else if (c->direction == PCMDIR_PLAY && (c->flags & CHN_F_HAS_VCHAN)) 780 FEEDER_BUILD(mixer); 781 else 782 return (ENOTSUP); 783 784 /* 785 * The basic idea is: The smaller the bandwidth, the cheaper the 786 * conversion process, with following constraints:- 787 * 788 * 1) Almost all feeders work best in 16/32 native endian. 789 * 2) Try to avoid 8bit feeders due to poor dynamic range. 790 * 3) Avoid volume, format, matrix and rate in BITPERFECT or 791 * PASSTHROUGH mode. 792 * 4) Try putting volume before EQ or rate. Should help to 793 * avoid/reduce possible clipping. 794 * 5) EQ require specific, valid rate, unless it allow sloppy 795 * conversion. 796 */ 797 if (FEEDMATRIX_UP(&cdesc)) { 798 if (FEEDEQ_REQUIRED(&cdesc) && 799 (!FEEDEQ_VALIDRATE(&cdesc, target) || 800 (cdesc.expensive == 0 && FEEDEQ_ECONOMY(&cdesc)))) 801 FEEDER_BUILD(eq); 802 if (FEEDRATE_REQUIRED(&cdesc)) 803 FEEDER_BUILD(rate); 804 FEEDER_BUILD(matrix); 805 if (FEEDVOLUME_REQUIRED(&cdesc)) 806 FEEDER_BUILD(volume); 807 if (FEEDEQ_REQUIRED(&cdesc)) 808 FEEDER_BUILD(eq); 809 } else if (FEEDMATRIX_DOWN(&cdesc)) { 810 FEEDER_BUILD(matrix); 811 if (FEEDVOLUME_REQUIRED(&cdesc)) 812 FEEDER_BUILD(volume); 813 if (FEEDEQ_REQUIRED(&cdesc) && 814 (!FEEDEQ_VALIDRATE(&cdesc, target) || 815 FEEDEQ_ECONOMY(&cdesc))) 816 FEEDER_BUILD(eq); 817 if (FEEDRATE_REQUIRED(&cdesc)) 818 FEEDER_BUILD(rate); 819 if (FEEDEQ_REQUIRED(&cdesc)) 820 FEEDER_BUILD(eq); 821 } else { 822 if (FEEDRATE_DOWN(&cdesc)) { 823 if (FEEDEQ_REQUIRED(&cdesc) && 824 !FEEDEQ_VALIDRATE(&cdesc, target)) { 825 if (FEEDVOLUME_REQUIRED(&cdesc)) 826 FEEDER_BUILD(volume); 827 FEEDER_BUILD(eq); 828 } 829 FEEDER_BUILD(rate); 830 } 831 if (FEEDMATRIX_REQUIRED(&cdesc)) 832 FEEDER_BUILD(matrix); 833 if (FEEDVOLUME_REQUIRED(&cdesc)) 834 FEEDER_BUILD(volume); 835 if (FEEDRATE_UP(&cdesc)) { 836 if (FEEDEQ_REQUIRED(&cdesc) && 837 !FEEDEQ_VALIDRATE(&cdesc, target)) 838 FEEDER_BUILD(eq); 839 FEEDER_BUILD(rate); 840 } 841 if (FEEDEQ_REQUIRED(&cdesc)) 842 FEEDER_BUILD(eq); 843 } 844 845 if (FEEDFORMAT_REQUIRED(&cdesc)) 846 FEEDER_BUILD(format); 847 848 if (c->direction == PCMDIR_REC && (c->flags & CHN_F_HAS_VCHAN)) 849 FEEDER_BUILD(mixer); 850 851 sndbuf_setfmt(c->bufsoft, c->format); 852 sndbuf_setspd(c->bufsoft, c->speed); 853 854 sndbuf_setfmt(c->bufhard, hwfmt); 855 856 chn_syncstate(c); 857 858 return (0); 859 } 860