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