Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/feeder.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * Copyright (c) 1999 Cameron Grant <cg@FreeBSD.org> 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 #ifdef HAVE_KERNEL_OPTION_HEADERS 31 #include "opt_snd.h" 32 #endif 33 34 #include <dev/sound/pcm/sound.h> 35 36 #include "feeder_if.h" 37 38 SND_DECLARE_FILE("$FreeBSD$"); 39 40 static MALLOC_DEFINE(M_FEEDER, "feeder", "pcm feeder"); 41 42 #define MAXFEEDERS 256 43 #undef FEEDER_DEBUG 44 45 struct feedertab_entry { 46 SLIST_ENTRY(feedertab_entry) link; 47 struct feeder_class *feederclass; 48 struct pcm_feederdesc *desc; 49 50 int idx; 51 }; 52 static SLIST_HEAD(, feedertab_entry) feedertab; 53 54 /*****************************************************************************/ 55 56 void 57 feeder_register(void *p) 58 { 59 static int feedercnt = 0; 60 61 struct feeder_class *fc = p; 62 struct feedertab_entry *fte; 63 int i; 64 65 if (feedercnt == 0) { 66 KASSERT(fc->desc == NULL, ("first feeder not root: %s", fc->name)); 67 68 SLIST_INIT(&feedertab); 69 fte = malloc(sizeof(*fte), M_FEEDER, M_NOWAIT | M_ZERO); 70 if (fte == NULL) { 71 printf("can't allocate memory for root feeder: %s\n", 72 fc->name); 73 74 return; 75 } 76 fte->feederclass = fc; 77 fte->desc = NULL; 78 fte->idx = feedercnt; 79 SLIST_INSERT_HEAD(&feedertab, fte, link); 80 feedercnt++; 81 82 /* initialize global variables */ 83 84 if (snd_verbose < 0 || snd_verbose > 4) 85 snd_verbose = 1; 86 87 /* initialize unit numbering */ 88 snd_unit_init(); 89 if (snd_unit < 0 || snd_unit > PCMMAXUNIT) 90 snd_unit = -1; 91 92 if (snd_maxautovchans < 0 || 93 snd_maxautovchans > SND_MAXVCHANS) 94 snd_maxautovchans = 0; 95 96 if (chn_latency < CHN_LATENCY_MIN || 97 chn_latency > CHN_LATENCY_MAX) 98 chn_latency = CHN_LATENCY_DEFAULT; 99 100 if (chn_latency_profile < CHN_LATENCY_PROFILE_MIN || 101 chn_latency_profile > CHN_LATENCY_PROFILE_MAX) 102 chn_latency_profile = CHN_LATENCY_PROFILE_DEFAULT; 103 104 if (feeder_rate_min < FEEDRATE_MIN || 105 feeder_rate_max < FEEDRATE_MIN || 106 feeder_rate_min > FEEDRATE_MAX || 107 feeder_rate_max > FEEDRATE_MAX || 108 !(feeder_rate_min < feeder_rate_max)) { 109 feeder_rate_min = FEEDRATE_RATEMIN; 110 feeder_rate_max = FEEDRATE_RATEMAX; 111 } 112 113 if (feeder_rate_round < FEEDRATE_ROUNDHZ_MIN || 114 feeder_rate_round > FEEDRATE_ROUNDHZ_MAX) 115 feeder_rate_round = FEEDRATE_ROUNDHZ; 116 117 if (bootverbose) 118 printf("%s: snd_unit=%d snd_maxautovchans=%d " 119 "latency=%d " 120 "feeder_rate_min=%d feeder_rate_max=%d " 121 "feeder_rate_round=%d\n", 122 __func__, snd_unit, snd_maxautovchans, 123 chn_latency, 124 feeder_rate_min, feeder_rate_max, 125 feeder_rate_round); 126 127 /* we've got our root feeder so don't veto pcm loading anymore */ 128 pcm_veto_load = 0; 129 130 return; 131 } 132 133 KASSERT(fc->desc != NULL, ("feeder '%s' has no descriptor", fc->name)); 134 135 /* beyond this point failure is non-fatal but may result in some translations being unavailable */ 136 i = 0; 137 while ((feedercnt < MAXFEEDERS) && (fc->desc[i].type > 0)) { 138 /* printf("adding feeder %s, %x -> %x\n", fc->name, fc->desc[i].in, fc->desc[i].out); */ 139 fte = malloc(sizeof(*fte), M_FEEDER, M_NOWAIT | M_ZERO); 140 if (fte == NULL) { 141 printf("can't allocate memory for feeder '%s', %x -> %x\n", fc->name, fc->desc[i].in, fc->desc[i].out); 142 143 return; 144 } 145 fte->feederclass = fc; 146 fte->desc = &fc->desc[i]; 147 fte->idx = feedercnt; 148 fte->desc->idx = feedercnt; 149 SLIST_INSERT_HEAD(&feedertab, fte, link); 150 i++; 151 } 152 feedercnt++; 153 if (feedercnt >= MAXFEEDERS) 154 printf("MAXFEEDERS (%d >= %d) exceeded\n", feedercnt, MAXFEEDERS); 155 } 156 157 static void 158 feeder_unregisterall(void *p) 159 { 160 struct feedertab_entry *fte, *next; 161 162 next = SLIST_FIRST(&feedertab); 163 while (next != NULL) { 164 fte = next; 165 next = SLIST_NEXT(fte, link); 166 free(fte, M_FEEDER); 167 } 168 } 169 170 static int 171 cmpdesc(struct pcm_feederdesc *n, struct pcm_feederdesc *m) 172 { 173 return ((n->type == m->type) && 174 ((n->in == 0) || (n->in == m->in)) && 175 ((n->out == 0) || (n->out == m->out)) && 176 (n->flags == m->flags)); 177 } 178 179 static void 180 feeder_destroy(struct pcm_feeder *f) 181 { 182 FEEDER_FREE(f); 183 kobj_delete((kobj_t)f, M_FEEDER); 184 } 185 186 static struct pcm_feeder * 187 feeder_create(struct feeder_class *fc, struct pcm_feederdesc *desc) 188 { 189 struct pcm_feeder *f; 190 int err; 191 192 f = (struct pcm_feeder *)kobj_create((kobj_class_t)fc, M_FEEDER, M_NOWAIT | M_ZERO); 193 if (f == NULL) 194 return NULL; 195 196 f->data = fc->data; 197 f->source = NULL; 198 f->parent = NULL; 199 f->class = fc; 200 f->desc = &(f->desc_static); 201 202 if (desc) { 203 *(f->desc) = *desc; 204 } else { 205 f->desc->type = FEEDER_ROOT; 206 f->desc->in = 0; 207 f->desc->out = 0; 208 f->desc->flags = 0; 209 f->desc->idx = 0; 210 } 211 212 err = FEEDER_INIT(f); 213 if (err) { 214 printf("feeder_init(%p) on %s returned %d\n", f, fc->name, err); 215 feeder_destroy(f); 216 217 return NULL; 218 } 219 220 return f; 221 } 222 223 struct feeder_class * 224 feeder_getclass(struct pcm_feederdesc *desc) 225 { 226 struct feedertab_entry *fte; 227 228 SLIST_FOREACH(fte, &feedertab, link) { 229 if ((desc == NULL) && (fte->desc == NULL)) 230 return fte->feederclass; 231 if ((fte->desc != NULL) && (desc != NULL) && cmpdesc(desc, fte->desc)) 232 return fte->feederclass; 233 } 234 return NULL; 235 } 236 237 int 238 chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc) 239 { 240 struct pcm_feeder *nf; 241 242 nf = feeder_create(fc, desc); 243 if (nf == NULL) 244 return ENOSPC; 245 246 nf->source = c->feeder; 247 248 if (c->feeder != NULL) 249 c->feeder->parent = nf; 250 c->feeder = nf; 251 252 return 0; 253 } 254 255 int 256 chn_removefeeder(struct pcm_channel *c) 257 { 258 struct pcm_feeder *f; 259 260 if (c->feeder == NULL) 261 return -1; 262 f = c->feeder; 263 c->feeder = c->feeder->source; 264 feeder_destroy(f); 265 266 return 0; 267 } 268 269 struct pcm_feeder * 270 chn_findfeeder(struct pcm_channel *c, u_int32_t type) 271 { 272 struct pcm_feeder *f; 273 274 f = c->feeder; 275 while (f != NULL) { 276 if (f->desc->type == type) 277 return f; 278 f = f->source; 279 } 280 281 return NULL; 282 } 283 284 /* 285 * 14bit format scoring 286 * -------------------- 287 * 288 * 13 12 11 10 9 8 2 1 0 offset 289 * +---+---+---+---+---+---+-------------+---+---+ 290 * | X | X | X | X | X | X | X X X X X X | X | X | 291 * +---+---+---+---+---+---+-------------+---+---+ 292 * | | | | | | | | | 293 * | | | | | | | | +--> signed? 294 * | | | | | | | | 295 * | | | | | | | +------> bigendian? 296 * | | | | | | | 297 * | | | | | | +---------------> total channels 298 * | | | | | | 299 * | | | | | +------------------------> AFMT_A_LAW 300 * | | | | | 301 * | | | | +----------------------------> AFMT_MU_LAW 302 * | | | | 303 * | | | +--------------------------------> AFMT_8BIT 304 * | | | 305 * | | +------------------------------------> AFMT_16BIT 306 * | | 307 * | +----------------------------------------> AFMT_24BIT 308 * | 309 * +--------------------------------------------> AFMT_32BIT 310 */ 311 #define score_signeq(s1, s2) (((s1) & 0x1) == ((s2) & 0x1)) 312 #define score_endianeq(s1, s2) (((s1) & 0x2) == ((s2) & 0x2)) 313 #define score_cheq(s1, s2) (((s1) & 0xfc) == ((s2) & 0xfc)) 314 #define score_chgt(s1, s2) (((s1) & 0xfc) > ((s2) & 0xfc)) 315 #define score_chlt(s1, s2) (((s1) & 0xfc) < ((s2) & 0xfc)) 316 #define score_val(s1) ((s1) & 0x3f00) 317 #define score_cse(s1) ((s1) & 0x7f) 318 319 u_int32_t 320 snd_fmtscore(u_int32_t fmt) 321 { 322 u_int32_t ret; 323 324 ret = 0; 325 if (fmt & AFMT_SIGNED) 326 ret |= 1 << 0; 327 if (fmt & AFMT_BIGENDIAN) 328 ret |= 1 << 1; 329 /*if (fmt & AFMT_STEREO) 330 ret |= (2 & 0x3f) << 2; 331 else 332 ret |= (1 & 0x3f) << 2;*/ 333 ret |= (AFMT_CHANNEL(fmt) & 0x3f) << 2; 334 if (fmt & AFMT_A_LAW) 335 ret |= 1 << 8; 336 else if (fmt & AFMT_MU_LAW) 337 ret |= 1 << 9; 338 else if (fmt & AFMT_8BIT) 339 ret |= 1 << 10; 340 else if (fmt & AFMT_16BIT) 341 ret |= 1 << 11; 342 else if (fmt & AFMT_24BIT) 343 ret |= 1 << 12; 344 else if (fmt & AFMT_32BIT) 345 ret |= 1 << 13; 346 347 return ret; 348 } 349 350 static u_int32_t 351 snd_fmtbestfunc(u_int32_t fmt, u_int32_t *fmts, int cheq) 352 { 353 u_int32_t best, score, score2, oldscore; 354 int i; 355 356 if (fmt == 0 || fmts == NULL || fmts[0] == 0) 357 return 0; 358 359 if (snd_fmtvalid(fmt, fmts)) 360 return fmt; 361 362 best = 0; 363 score = snd_fmtscore(fmt); 364 oldscore = 0; 365 for (i = 0; fmts[i] != 0; i++) { 366 score2 = snd_fmtscore(fmts[i]); 367 if (cheq && !score_cheq(score, score2) && 368 (score_chlt(score2, score) || 369 (oldscore != 0 && score_chgt(score2, oldscore)))) 370 continue; 371 if (oldscore == 0 || 372 (score_val(score2) == score_val(score)) || 373 (score_val(score2) == score_val(oldscore)) || 374 (score_val(score2) > score_val(oldscore) && 375 score_val(score2) < score_val(score)) || 376 (score_val(score2) < score_val(oldscore) && 377 score_val(score2) > score_val(score)) || 378 (score_val(oldscore) < score_val(score) && 379 score_val(score2) > score_val(oldscore))) { 380 if (score_val(oldscore) != score_val(score2) || 381 score_cse(score) == score_cse(score2) || 382 ((score_cse(oldscore) != score_cse(score) && 383 !score_endianeq(score, oldscore) && 384 (score_endianeq(score, score2) || 385 (!score_signeq(score, oldscore) && 386 score_signeq(score, score2)))))) { 387 best = fmts[i]; 388 oldscore = score2; 389 } 390 } 391 } 392 return best; 393 } 394 395 u_int32_t 396 snd_fmtbestbit(u_int32_t fmt, u_int32_t *fmts) 397 { 398 return snd_fmtbestfunc(fmt, fmts, 0); 399 } 400 401 u_int32_t 402 snd_fmtbestchannel(u_int32_t fmt, u_int32_t *fmts) 403 { 404 return snd_fmtbestfunc(fmt, fmts, 1); 405 } 406 407 u_int32_t 408 snd_fmtbest(u_int32_t fmt, u_int32_t *fmts) 409 { 410 u_int32_t best1, best2; 411 u_int32_t score, score1, score2; 412 413 if (snd_fmtvalid(fmt, fmts)) 414 return fmt; 415 416 best1 = snd_fmtbestchannel(fmt, fmts); 417 best2 = snd_fmtbestbit(fmt, fmts); 418 419 if (best1 != 0 && best2 != 0 && best1 != best2) { 420 /*if (fmt & AFMT_STEREO)*/ 421 if (AFMT_CHANNEL(fmt) > 1) 422 return best1; 423 else { 424 score = score_val(snd_fmtscore(fmt)); 425 score1 = score_val(snd_fmtscore(best1)); 426 score2 = score_val(snd_fmtscore(best2)); 427 if (score1 == score2 || score1 == score) 428 return best1; 429 else if (score2 == score) 430 return best2; 431 else if (score1 > score2) 432 return best1; 433 return best2; 434 } 435 } else if (best2 == 0) 436 return best1; 437 else 438 return best2; 439 } 440 441 void 442 feeder_printchain(struct pcm_feeder *head) 443 { 444 struct pcm_feeder *f; 445 446 printf("feeder chain (head @%p)\n", head); 447 f = head; 448 while (f != NULL) { 449 printf("%s/%d @ %p\n", f->class->name, f->desc->idx, f); 450 f = f->source; 451 } 452 printf("[end]\n\n"); 453 } 454 455 /*****************************************************************************/ 456 457 static int 458 feed_root(struct pcm_feeder *feeder, struct pcm_channel *ch, u_int8_t *buffer, u_int32_t count, void *source) 459 { 460 struct snd_dbuf *src = source; 461 int l, offset; 462 463 KASSERT(count > 0, ("feed_root: count == 0")); 464 465 if (++ch->feedcount == 0) 466 ch->feedcount = 2; 467 468 l = min(count, sndbuf_getready(src)); 469 470 /* When recording only return as much data as available */ 471 if (ch->direction == PCMDIR_REC) { 472 sndbuf_dispose(src, buffer, l); 473 return l; 474 } 475 476 477 offset = count - l; 478 479 if (offset > 0) { 480 if (snd_verbose > 3) 481 printf("%s: (%s) %spending %d bytes " 482 "(count=%d l=%d feed=%d)\n", 483 __func__, 484 (ch->flags & CHN_F_VIRTUAL) ? "virtual" : "hardware", 485 (ch->feedcount == 1) ? "pre" : "ap", 486 offset, count, l, ch->feedcount); 487 488 if (ch->feedcount == 1) { 489 memset(buffer, 490 sndbuf_zerodata(sndbuf_getfmt(src)), 491 offset); 492 if (l > 0) 493 sndbuf_dispose(src, buffer + offset, l); 494 else 495 ch->feedcount--; 496 } else { 497 if (l > 0) 498 sndbuf_dispose(src, buffer, l); 499 memset(buffer + l, 500 sndbuf_zerodata(sndbuf_getfmt(src)), 501 offset); 502 if (!(ch->flags & CHN_F_CLOSING)) 503 ch->xruns++; 504 } 505 } else if (l > 0) 506 sndbuf_dispose(src, buffer, l); 507 508 return count; 509 } 510 511 static kobj_method_t feeder_root_methods[] = { 512 KOBJMETHOD(feeder_feed, feed_root), 513 KOBJMETHOD_END 514 }; 515 static struct feeder_class feeder_root_class = { 516 .name = "feeder_root", 517 .methods = feeder_root_methods, 518 .size = sizeof(struct pcm_feeder), 519 .desc = NULL, 520 .data = NULL, 521 }; 522 SYSINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_register, &feeder_root_class); 523 SYSUNINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_unregisterall, NULL);
Cache object: b3b9f33325c4486c32adb8eef79a7bb2
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]