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_matrix.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) 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 /* 30 * feeder_matrix: Generic any-to-any channel matrixing. Probably not the 31 * accurate way of doing things, but it should be fast and 32 * transparent enough, not to mention capable of handling 33 * possible non-standard way of multichannel interleaving 34 * order. In other words, it is tough to break. 35 * 36 * The Good: 37 * + very generic and compact, provided that the supplied matrix map is in a 38 * sane form. 39 * + should be fast enough. 40 * 41 * The Bad: 42 * + somebody might disagree with it. 43 * + 'matrix' is kind of 0x7a69, due to prolong mental block. 44 */ 45 46 #ifdef _KERNEL 47 #ifdef HAVE_KERNEL_OPTION_HEADERS 48 #include "opt_snd.h" 49 #endif 50 #include <dev/sound/pcm/sound.h> 51 #include <dev/sound/pcm/pcm.h> 52 #include "feeder_if.h" 53 54 #define SND_USE_FXDIV 55 #include "snd_fxdiv_gen.h" 56 57 SND_DECLARE_FILE("$FreeBSD$"); 58 #endif 59 60 #define FEEDMATRIX_RESERVOIR (SND_CHN_MAX * PCM_32_BPS) 61 62 #define SND_CHN_T_EOF 0x00e0fe0f 63 #define SND_CHN_T_NULL 0x0e0e0e0e 64 65 struct feed_matrix_info; 66 67 typedef void (*feed_matrix_t)(struct feed_matrix_info *, uint8_t *, 68 uint8_t *, uint32_t); 69 70 struct feed_matrix_info { 71 uint32_t bps; 72 uint32_t ialign, oalign; 73 uint32_t in, out; 74 feed_matrix_t apply; 75 #ifdef FEEDMATRIX_GENERIC 76 intpcm_read_t *rd; 77 intpcm_write_t *wr; 78 #endif 79 struct { 80 int chn[SND_CHN_T_MAX + 1]; 81 int mul, shift; 82 } matrix[SND_CHN_T_MAX + 1]; 83 uint8_t reservoir[FEEDMATRIX_RESERVOIR]; 84 }; 85 86 static struct pcmchan_matrix feeder_matrix_maps[SND_CHN_MATRIX_MAX] = { 87 [SND_CHN_MATRIX_1_0] = SND_CHN_MATRIX_MAP_1_0, 88 [SND_CHN_MATRIX_2_0] = SND_CHN_MATRIX_MAP_2_0, 89 [SND_CHN_MATRIX_2_1] = SND_CHN_MATRIX_MAP_2_1, 90 [SND_CHN_MATRIX_3_0] = SND_CHN_MATRIX_MAP_3_0, 91 [SND_CHN_MATRIX_3_1] = SND_CHN_MATRIX_MAP_3_1, 92 [SND_CHN_MATRIX_4_0] = SND_CHN_MATRIX_MAP_4_0, 93 [SND_CHN_MATRIX_4_1] = SND_CHN_MATRIX_MAP_4_1, 94 [SND_CHN_MATRIX_5_0] = SND_CHN_MATRIX_MAP_5_0, 95 [SND_CHN_MATRIX_5_1] = SND_CHN_MATRIX_MAP_5_1, 96 [SND_CHN_MATRIX_6_0] = SND_CHN_MATRIX_MAP_6_0, 97 [SND_CHN_MATRIX_6_1] = SND_CHN_MATRIX_MAP_6_1, 98 [SND_CHN_MATRIX_7_0] = SND_CHN_MATRIX_MAP_7_0, 99 [SND_CHN_MATRIX_7_1] = SND_CHN_MATRIX_MAP_7_1 100 }; 101 102 static int feeder_matrix_default_ids[9] = { 103 [0] = SND_CHN_MATRIX_UNKNOWN, 104 [1] = SND_CHN_MATRIX_1, 105 [2] = SND_CHN_MATRIX_2, 106 [3] = SND_CHN_MATRIX_3, 107 [4] = SND_CHN_MATRIX_4, 108 [5] = SND_CHN_MATRIX_5, 109 [6] = SND_CHN_MATRIX_6, 110 [7] = SND_CHN_MATRIX_7, 111 [8] = SND_CHN_MATRIX_8 112 }; 113 114 #ifdef _KERNEL 115 #define FEEDMATRIX_CLIP_CHECK(...) 116 #else 117 #define FEEDMATRIX_CLIP_CHECK(v, BIT) do { \ 118 if ((v) < PCM_S##BIT##_MIN || (v) > PCM_S##BIT##_MAX) \ 119 errx(1, "\n\n%s(): Sample clipping: %jd\n", \ 120 __func__, (intmax_t)(v)); \ 121 } while (0) 122 #endif 123 124 #define FEEDMATRIX_DECLARE(SIGN, BIT, ENDIAN) \ 125 static void \ 126 feed_matrix_##SIGN##BIT##ENDIAN(struct feed_matrix_info *info, \ 127 uint8_t *src, uint8_t *dst, uint32_t count) \ 128 { \ 129 intpcm64_t accum; \ 130 intpcm_t v; \ 131 int i, j; \ 132 \ 133 do { \ 134 for (i = 0; info->matrix[i].chn[0] != SND_CHN_T_EOF; \ 135 i++) { \ 136 if (info->matrix[i].chn[0] == SND_CHN_T_NULL) { \ 137 _PCM_WRITE_##SIGN##BIT##_##ENDIAN(dst, \ 138 0); \ 139 dst += PCM_##BIT##_BPS; \ 140 continue; \ 141 } else if (info->matrix[i].chn[1] == \ 142 SND_CHN_T_EOF) { \ 143 v = _PCM_READ_##SIGN##BIT##_##ENDIAN( \ 144 src + info->matrix[i].chn[0]); \ 145 _PCM_WRITE_##SIGN##BIT##_##ENDIAN(dst, \ 146 v); \ 147 dst += PCM_##BIT##_BPS; \ 148 continue; \ 149 } \ 150 \ 151 accum = 0; \ 152 for (j = 0; \ 153 info->matrix[i].chn[j] != SND_CHN_T_EOF; \ 154 j++) { \ 155 v = _PCM_READ_##SIGN##BIT##_##ENDIAN( \ 156 src + info->matrix[i].chn[j]); \ 157 accum += v; \ 158 } \ 159 \ 160 accum = (accum * info->matrix[i].mul) >> \ 161 info->matrix[i].shift; \ 162 \ 163 FEEDMATRIX_CLIP_CHECK(accum, BIT); \ 164 \ 165 v = (accum > PCM_S##BIT##_MAX) ? \ 166 PCM_S##BIT##_MAX : \ 167 ((accum < PCM_S##BIT##_MIN) ? \ 168 PCM_S##BIT##_MIN : \ 169 accum); \ 170 _PCM_WRITE_##SIGN##BIT##_##ENDIAN(dst, v); \ 171 dst += PCM_##BIT##_BPS; \ 172 } \ 173 src += info->ialign; \ 174 } while (--count != 0); \ 175 } 176 177 #if BYTE_ORDER == LITTLE_ENDIAN || defined(SND_FEEDER_MULTIFORMAT) 178 FEEDMATRIX_DECLARE(S, 16, LE) 179 FEEDMATRIX_DECLARE(S, 32, LE) 180 #endif 181 #if BYTE_ORDER == BIG_ENDIAN || defined(SND_FEEDER_MULTIFORMAT) 182 FEEDMATRIX_DECLARE(S, 16, BE) 183 FEEDMATRIX_DECLARE(S, 32, BE) 184 #endif 185 #ifdef SND_FEEDER_MULTIFORMAT 186 FEEDMATRIX_DECLARE(S, 8, NE) 187 FEEDMATRIX_DECLARE(S, 24, LE) 188 FEEDMATRIX_DECLARE(S, 24, BE) 189 FEEDMATRIX_DECLARE(U, 8, NE) 190 FEEDMATRIX_DECLARE(U, 16, LE) 191 FEEDMATRIX_DECLARE(U, 24, LE) 192 FEEDMATRIX_DECLARE(U, 32, LE) 193 FEEDMATRIX_DECLARE(U, 16, BE) 194 FEEDMATRIX_DECLARE(U, 24, BE) 195 FEEDMATRIX_DECLARE(U, 32, BE) 196 #endif 197 198 #define FEEDMATRIX_ENTRY(SIGN, BIT, ENDIAN) \ 199 { \ 200 AFMT_##SIGN##BIT##_##ENDIAN, \ 201 feed_matrix_##SIGN##BIT##ENDIAN \ 202 } 203 204 static const struct { 205 uint32_t format; 206 feed_matrix_t apply; 207 } feed_matrix_tab[] = { 208 #if BYTE_ORDER == LITTLE_ENDIAN || defined(SND_FEEDER_MULTIFORMAT) 209 FEEDMATRIX_ENTRY(S, 16, LE), 210 FEEDMATRIX_ENTRY(S, 32, LE), 211 #endif 212 #if BYTE_ORDER == BIG_ENDIAN || defined(SND_FEEDER_MULTIFORMAT) 213 FEEDMATRIX_ENTRY(S, 16, BE), 214 FEEDMATRIX_ENTRY(S, 32, BE), 215 #endif 216 #ifdef SND_FEEDER_MULTIFORMAT 217 FEEDMATRIX_ENTRY(S, 8, NE), 218 FEEDMATRIX_ENTRY(S, 24, LE), 219 FEEDMATRIX_ENTRY(S, 24, BE), 220 FEEDMATRIX_ENTRY(U, 8, NE), 221 FEEDMATRIX_ENTRY(U, 16, LE), 222 FEEDMATRIX_ENTRY(U, 24, LE), 223 FEEDMATRIX_ENTRY(U, 32, LE), 224 FEEDMATRIX_ENTRY(U, 16, BE), 225 FEEDMATRIX_ENTRY(U, 24, BE), 226 FEEDMATRIX_ENTRY(U, 32, BE) 227 #endif 228 }; 229 230 static void 231 feed_matrix_reset(struct feed_matrix_info *info) 232 { 233 uint32_t i, j; 234 235 for (i = 0; i < (sizeof(info->matrix) / sizeof(info->matrix[0])); i++) { 236 for (j = 0; 237 j < (sizeof(info->matrix[i].chn) / 238 sizeof(info->matrix[i].chn[0])); j++) { 239 info->matrix[i].chn[j] = SND_CHN_T_EOF; 240 } 241 info->matrix[i].mul = 1; 242 info->matrix[i].shift = 0; 243 } 244 } 245 246 #ifdef FEEDMATRIX_GENERIC 247 static void 248 feed_matrix_apply_generic(struct feed_matrix_info *info, 249 uint8_t *src, uint8_t *dst, uint32_t count) 250 { 251 intpcm64_t accum; 252 intpcm_t v; 253 int i, j; 254 255 do { 256 for (i = 0; info->matrix[i].chn[0] != SND_CHN_T_EOF; 257 i++) { 258 if (info->matrix[i].chn[0] == SND_CHN_T_NULL) { 259 info->wr(dst, 0); 260 dst += info->bps; 261 continue; 262 } else if (info->matrix[i].chn[1] == 263 SND_CHN_T_EOF) { 264 v = info->rd(src + info->matrix[i].chn[0]); 265 info->wr(dst, v); 266 dst += info->bps; 267 continue; 268 } 269 270 accum = 0; 271 for (j = 0; 272 info->matrix[i].chn[j] != SND_CHN_T_EOF; 273 j++) { 274 v = info->rd(src + info->matrix[i].chn[j]); 275 accum += v; 276 } 277 278 accum = (accum * info->matrix[i].mul) >> 279 info->matrix[i].shift; 280 281 FEEDMATRIX_CLIP_CHECK(accum, 32); 282 283 v = (accum > PCM_S32_MAX) ? PCM_S32_MAX : 284 ((accum < PCM_S32_MIN) ? PCM_S32_MIN : accum); 285 info->wr(dst, v); 286 dst += info->bps; 287 } 288 src += info->ialign; 289 } while (--count != 0); 290 } 291 #endif 292 293 static int 294 feed_matrix_setup(struct feed_matrix_info *info, struct pcmchan_matrix *m_in, 295 struct pcmchan_matrix *m_out) 296 { 297 uint32_t i, j, ch, in_mask, merge_mask; 298 int mul, shift; 299 300 if (info == NULL || m_in == NULL || m_out == NULL || 301 AFMT_CHANNEL(info->in) != m_in->channels || 302 AFMT_CHANNEL(info->out) != m_out->channels || 303 m_in->channels < SND_CHN_MIN || m_in->channels > SND_CHN_MAX || 304 m_out->channels < SND_CHN_MIN || m_out->channels > SND_CHN_MAX) 305 return (EINVAL); 306 307 feed_matrix_reset(info); 308 309 /* 310 * If both in and out are part of standard matrix and identical, skip 311 * everything altogether. 312 */ 313 if (m_in->id == m_out->id && !(m_in->id < SND_CHN_MATRIX_BEGIN || 314 m_in->id > SND_CHN_MATRIX_END)) 315 return (0); 316 317 /* 318 * Special case for mono input matrix. If the output supports 319 * possible 'center' channel, route it there. Otherwise, let it be 320 * matrixed to left/right. 321 */ 322 if (m_in->id == SND_CHN_MATRIX_1_0) { 323 if (m_out->id == SND_CHN_MATRIX_1_0) 324 in_mask = SND_CHN_T_MASK_FL; 325 else if (m_out->mask & SND_CHN_T_MASK_FC) 326 in_mask = SND_CHN_T_MASK_FC; 327 else 328 in_mask = SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR; 329 } else 330 in_mask = m_in->mask; 331 332 /* Merge, reduce, expand all possibilites. */ 333 for (ch = SND_CHN_T_BEGIN; ch <= SND_CHN_T_END && 334 m_out->map[ch].type != SND_CHN_T_MAX; ch += SND_CHN_T_STEP) { 335 merge_mask = m_out->map[ch].members & in_mask; 336 if (merge_mask == 0) { 337 info->matrix[ch].chn[0] = SND_CHN_T_NULL; 338 continue; 339 } 340 341 j = 0; 342 for (i = SND_CHN_T_BEGIN; i <= SND_CHN_T_END; 343 i += SND_CHN_T_STEP) { 344 if (merge_mask & (1 << i)) { 345 if (m_in->offset[i] >= 0 && 346 m_in->offset[i] < (int)m_in->channels) 347 info->matrix[ch].chn[j++] = 348 m_in->offset[i] * info->bps; 349 else { 350 info->matrix[ch].chn[j++] = 351 SND_CHN_T_EOF; 352 break; 353 } 354 } 355 } 356 357 #define FEEDMATRIX_ATTN_SHIFT 16 358 359 if (j > 1) { 360 /* 361 * XXX For channel that require accumulation from 362 * multiple channels, apply a slight attenuation to 363 * avoid clipping. 364 */ 365 mul = (1 << (FEEDMATRIX_ATTN_SHIFT - 1)) + 143 - j; 366 shift = FEEDMATRIX_ATTN_SHIFT; 367 while ((mul & 1) == 0 && shift > 0) { 368 mul >>= 1; 369 shift--; 370 } 371 info->matrix[ch].mul = mul; 372 info->matrix[ch].shift = shift; 373 } 374 } 375 376 #ifndef _KERNEL 377 fprintf(stderr, "Total: %d\n", ch); 378 379 for (i = 0; info->matrix[i].chn[0] != SND_CHN_T_EOF; i++) { 380 fprintf(stderr, "%d: [", i); 381 for (j = 0; info->matrix[i].chn[j] != SND_CHN_T_EOF; j++) { 382 if (j != 0) 383 fprintf(stderr, ", "); 384 fprintf(stderr, "%d", 385 (info->matrix[i].chn[j] == SND_CHN_T_NULL) ? 386 0xffffffff : info->matrix[i].chn[j] / info->bps); 387 } 388 fprintf(stderr, "] attn: (x * %d) >> %d\n", 389 info->matrix[i].mul, info->matrix[i].shift); 390 } 391 #endif 392 393 return (0); 394 } 395 396 static int 397 feed_matrix_init(struct pcm_feeder *f) 398 { 399 struct feed_matrix_info *info; 400 struct pcmchan_matrix *m_in, *m_out; 401 uint32_t i; 402 int ret; 403 404 if (AFMT_ENCODING(f->desc->in) != AFMT_ENCODING(f->desc->out)) 405 return (EINVAL); 406 407 info = malloc(sizeof(*info), M_DEVBUF, M_NOWAIT | M_ZERO); 408 if (info == NULL) 409 return (ENOMEM); 410 411 info->in = f->desc->in; 412 info->out = f->desc->out; 413 info->bps = AFMT_BPS(info->in); 414 info->ialign = AFMT_ALIGN(info->in); 415 info->oalign = AFMT_ALIGN(info->out); 416 info->apply = NULL; 417 418 for (i = 0; info->apply == NULL && 419 i < (sizeof(feed_matrix_tab) / sizeof(feed_matrix_tab[0])); i++) { 420 if (AFMT_ENCODING(info->in) == feed_matrix_tab[i].format) 421 info->apply = feed_matrix_tab[i].apply; 422 } 423 424 if (info->apply == NULL) { 425 #ifdef FEEDMATRIX_GENERIC 426 info->rd = feeder_format_read_op(info->in); 427 info->wr = feeder_format_write_op(info->out); 428 if (info->rd == NULL || info->wr == NULL) { 429 free(info, M_DEVBUF); 430 return (EINVAL); 431 } 432 info->apply = feed_matrix_apply_generic; 433 #else 434 free(info, M_DEVBUF); 435 return (EINVAL); 436 #endif 437 } 438 439 m_in = feeder_matrix_format_map(info->in); 440 m_out = feeder_matrix_format_map(info->out); 441 442 ret = feed_matrix_setup(info, m_in, m_out); 443 if (ret != 0) { 444 free(info, M_DEVBUF); 445 return (ret); 446 } 447 448 f->data = info; 449 450 return (0); 451 } 452 453 static int 454 feed_matrix_free(struct pcm_feeder *f) 455 { 456 struct feed_matrix_info *info; 457 458 info = f->data; 459 if (info != NULL) 460 free(info, M_DEVBUF); 461 462 f->data = NULL; 463 464 return (0); 465 } 466 467 static int 468 feed_matrix_feed(struct pcm_feeder *f, struct pcm_channel *c, uint8_t *b, 469 uint32_t count, void *source) 470 { 471 struct feed_matrix_info *info; 472 uint32_t j, inmax; 473 uint8_t *src, *dst; 474 475 info = f->data; 476 if (info->matrix[0].chn[0] == SND_CHN_T_EOF) 477 return (FEEDER_FEED(f->source, c, b, count, source)); 478 479 dst = b; 480 count = SND_FXROUND(count, info->oalign); 481 inmax = info->ialign + info->oalign; 482 483 /* 484 * This loop might look simmilar to other feeder_* loops, but be 485 * advised: matrixing might involve overlapping (think about 486 * swapping end to front or something like that). In this regard it 487 * might be simmilar to feeder_format, but feeder_format works on 488 * 'sample' domain where it can be fitted into single 32bit integer 489 * while matrixing works on 'sample frame' domain. 490 */ 491 do { 492 if (count < info->oalign) 493 break; 494 495 if (count < inmax) { 496 src = info->reservoir; 497 j = info->ialign; 498 } else { 499 if (info->ialign == info->oalign) 500 j = count - info->oalign; 501 else if (info->ialign > info->oalign) 502 j = SND_FXROUND(count - info->oalign, 503 info->ialign); 504 else 505 j = (SND_FXDIV(count, info->oalign) - 1) * 506 info->ialign; 507 src = dst + count - j; 508 } 509 510 j = SND_FXDIV(FEEDER_FEED(f->source, c, src, j, source), 511 info->ialign); 512 if (j == 0) 513 break; 514 515 info->apply(info, src, dst, j); 516 517 j *= info->oalign; 518 dst += j; 519 count -= j; 520 521 } while (count != 0); 522 523 return (dst - b); 524 } 525 526 static struct pcm_feederdesc feeder_matrix_desc[] = { 527 { FEEDER_MATRIX, 0, 0, 0, 0 }, 528 { 0, 0, 0, 0, 0 } 529 }; 530 531 static kobj_method_t feeder_matrix_methods[] = { 532 KOBJMETHOD(feeder_init, feed_matrix_init), 533 KOBJMETHOD(feeder_free, feed_matrix_free), 534 KOBJMETHOD(feeder_feed, feed_matrix_feed), 535 KOBJMETHOD_END 536 }; 537 538 FEEDER_DECLARE(feeder_matrix, NULL); 539 540 /* External */ 541 int 542 feeder_matrix_setup(struct pcm_feeder *f, struct pcmchan_matrix *m_in, 543 struct pcmchan_matrix *m_out) 544 { 545 546 if (f == NULL || f->desc == NULL || f->desc->type != FEEDER_MATRIX || 547 f->data == NULL) 548 return (EINVAL); 549 550 return (feed_matrix_setup(f->data, m_in, m_out)); 551 } 552 553 /* 554 * feeder_matrix_default_id(): For a given number of channels, return 555 * default preferred id (example: both 5.1 and 556 * 6.0 are simply 6 channels, but 5.1 is more 557 * preferable). 558 */ 559 int 560 feeder_matrix_default_id(uint32_t ch) 561 { 562 563 if (ch < feeder_matrix_maps[SND_CHN_MATRIX_BEGIN].channels || 564 ch > feeder_matrix_maps[SND_CHN_MATRIX_END].channels) 565 return (SND_CHN_MATRIX_UNKNOWN); 566 567 return (feeder_matrix_maps[feeder_matrix_default_ids[ch]].id); 568 } 569 570 /* 571 * feeder_matrix_default_channel_map(): Ditto, but return matrix map 572 * instead. 573 */ 574 struct pcmchan_matrix * 575 feeder_matrix_default_channel_map(uint32_t ch) 576 { 577 578 if (ch < feeder_matrix_maps[SND_CHN_MATRIX_BEGIN].channels || 579 ch > feeder_matrix_maps[SND_CHN_MATRIX_END].channels) 580 return (NULL); 581 582 return (&feeder_matrix_maps[feeder_matrix_default_ids[ch]]); 583 } 584 585 /* 586 * feeder_matrix_default_format(): For a given audio format, return the 587 * proper audio format based on preferable 588 * matrix. 589 */ 590 uint32_t 591 feeder_matrix_default_format(uint32_t format) 592 { 593 struct pcmchan_matrix *m; 594 uint32_t i, ch, ext; 595 596 ch = AFMT_CHANNEL(format); 597 ext = AFMT_EXTCHANNEL(format); 598 599 if (ext != 0) { 600 for (i = SND_CHN_MATRIX_BEGIN; i <= SND_CHN_MATRIX_END; i++) { 601 if (feeder_matrix_maps[i].channels == ch && 602 feeder_matrix_maps[i].ext == ext) 603 return (SND_FORMAT(format, ch, ext)); 604 } 605 } 606 607 m = feeder_matrix_default_channel_map(ch); 608 if (m == NULL) 609 return (0x00000000); 610 611 return (SND_FORMAT(format, ch, m->ext)); 612 } 613 614 /* 615 * feeder_matrix_format_id(): For a given audio format, return its matrix 616 * id. 617 */ 618 int 619 feeder_matrix_format_id(uint32_t format) 620 { 621 uint32_t i, ch, ext; 622 623 ch = AFMT_CHANNEL(format); 624 ext = AFMT_EXTCHANNEL(format); 625 626 for (i = SND_CHN_MATRIX_BEGIN; i <= SND_CHN_MATRIX_END; i++) { 627 if (feeder_matrix_maps[i].channels == ch && 628 feeder_matrix_maps[i].ext == ext) 629 return (feeder_matrix_maps[i].id); 630 } 631 632 return (SND_CHN_MATRIX_UNKNOWN); 633 } 634 635 /* 636 * feeder_matrix_format_map(): For a given audio format, return its matrix 637 * map. 638 */ 639 struct pcmchan_matrix * 640 feeder_matrix_format_map(uint32_t format) 641 { 642 uint32_t i, ch, ext; 643 644 ch = AFMT_CHANNEL(format); 645 ext = AFMT_EXTCHANNEL(format); 646 647 for (i = SND_CHN_MATRIX_BEGIN; i <= SND_CHN_MATRIX_END; i++) { 648 if (feeder_matrix_maps[i].channels == ch && 649 feeder_matrix_maps[i].ext == ext) 650 return (&feeder_matrix_maps[i]); 651 } 652 653 return (NULL); 654 } 655 656 /* 657 * feeder_matrix_id_map(): For a given matrix id, return its matrix map. 658 */ 659 struct pcmchan_matrix * 660 feeder_matrix_id_map(int id) 661 { 662 663 if (id < SND_CHN_MATRIX_BEGIN || id > SND_CHN_MATRIX_END) 664 return (NULL); 665 666 return (&feeder_matrix_maps[id]); 667 } 668 669 /* 670 * feeder_matrix_compare(): Compare the simmilarities of matrices. 671 */ 672 int 673 feeder_matrix_compare(struct pcmchan_matrix *m_in, struct pcmchan_matrix *m_out) 674 { 675 uint32_t i; 676 677 if (m_in == m_out) 678 return (0); 679 680 if (m_in->channels != m_out->channels || m_in->ext != m_out->ext || 681 m_in->mask != m_out->mask) 682 return (1); 683 684 for (i = 0; i < (sizeof(m_in->map) / sizeof(m_in->map[0])); i++) { 685 if (m_in->map[i].type != m_out->map[i].type) 686 return (1); 687 if (m_in->map[i].type == SND_CHN_T_MAX) 688 break; 689 if (m_in->map[i].members != m_out->map[i].members) 690 return (1); 691 if (i <= SND_CHN_T_END) { 692 if (m_in->offset[m_in->map[i].type] != 693 m_out->offset[m_out->map[i].type]) 694 return (1); 695 } 696 } 697 698 return (0); 699 } 700 701 /* 702 * XXX 4front interpretation of "surround" is ambigous and sort of 703 * conflicting with "rear"/"back". Map it to "side". Well.. 704 * who cares? 705 */ 706 static int snd_chn_to_oss[SND_CHN_T_MAX] = { 707 [SND_CHN_T_FL] = CHID_L, 708 [SND_CHN_T_FR] = CHID_R, 709 [SND_CHN_T_FC] = CHID_C, 710 [SND_CHN_T_LF] = CHID_LFE, 711 [SND_CHN_T_SL] = CHID_LS, 712 [SND_CHN_T_SR] = CHID_RS, 713 [SND_CHN_T_BL] = CHID_LR, 714 [SND_CHN_T_BR] = CHID_RR 715 }; 716 717 #define SND_CHN_OSS_VALIDMASK \ 718 (SND_CHN_T_MASK_FL | SND_CHN_T_MASK_FR | \ 719 SND_CHN_T_MASK_FC | SND_CHN_T_MASK_LF | \ 720 SND_CHN_T_MASK_SL | SND_CHN_T_MASK_SR | \ 721 SND_CHN_T_MASK_BL | SND_CHN_T_MASK_BR) 722 723 #define SND_CHN_OSS_MAX 8 724 #define SND_CHN_OSS_BEGIN CHID_L 725 #define SND_CHN_OSS_END CHID_RR 726 727 static int oss_to_snd_chn[SND_CHN_OSS_END + 1] = { 728 [CHID_L] = SND_CHN_T_FL, 729 [CHID_R] = SND_CHN_T_FR, 730 [CHID_C] = SND_CHN_T_FC, 731 [CHID_LFE] = SND_CHN_T_LF, 732 [CHID_LS] = SND_CHN_T_SL, 733 [CHID_RS] = SND_CHN_T_SR, 734 [CHID_LR] = SND_CHN_T_BL, 735 [CHID_RR] = SND_CHN_T_BR 736 }; 737 738 /* 739 * Used by SNDCTL_DSP_GET_CHNORDER. 740 */ 741 int 742 feeder_matrix_oss_get_channel_order(struct pcmchan_matrix *m, 743 unsigned long long *map) 744 { 745 unsigned long long tmpmap; 746 uint32_t i; 747 748 if (m == NULL || map == NULL || (m->mask & ~SND_CHN_OSS_VALIDMASK) || 749 m->channels > SND_CHN_OSS_MAX) 750 return (EINVAL); 751 752 tmpmap = 0x0000000000000000ULL; 753 754 for (i = 0; i < SND_CHN_OSS_MAX && m->map[i].type != SND_CHN_T_MAX; 755 i++) { 756 if ((1 << m->map[i].type) & ~SND_CHN_OSS_VALIDMASK) 757 return (EINVAL); 758 tmpmap |= 759 (unsigned long long)snd_chn_to_oss[m->map[i].type] << 760 (i * 4); 761 } 762 763 *map = tmpmap; 764 765 return (0); 766 } 767 768 /* 769 * Used by SNDCTL_DSP_SET_CHNORDER. 770 */ 771 int 772 feeder_matrix_oss_set_channel_order(struct pcmchan_matrix *m, 773 unsigned long long *map) 774 { 775 struct pcmchan_matrix tmp; 776 uint32_t chmask, i; 777 int ch, cheof; 778 779 if (m == NULL || map == NULL || (m->mask & ~SND_CHN_OSS_VALIDMASK) || 780 m->channels > SND_CHN_OSS_MAX || (*map & 0xffffffff00000000ULL)) 781 return (EINVAL); 782 783 tmp = *m; 784 tmp.channels = 0; 785 tmp.ext = 0; 786 tmp.mask = 0; 787 memset(tmp.offset, -1, sizeof(tmp.offset)); 788 cheof = 0; 789 790 for (i = 0; i < SND_CHN_OSS_MAX; i++) { 791 ch = (*map >> (i * 4)) & 0xf; 792 if (ch < SND_CHN_OSS_BEGIN) { 793 if (cheof == 0 && m->map[i].type != SND_CHN_T_MAX) 794 return (EINVAL); 795 cheof++; 796 tmp.map[i] = m->map[i]; 797 continue; 798 } else if (ch > SND_CHN_OSS_END) 799 return (EINVAL); 800 else if (cheof != 0) 801 return (EINVAL); 802 ch = oss_to_snd_chn[ch]; 803 chmask = 1 << ch; 804 /* channel not exist in matrix */ 805 if (!(chmask & m->mask)) 806 return (EINVAL); 807 /* duplicated channel */ 808 if (chmask & tmp.mask) 809 return (EINVAL); 810 tmp.map[i] = m->map[m->offset[ch]]; 811 if (tmp.map[i].type != ch) 812 return (EINVAL); 813 tmp.offset[ch] = i; 814 tmp.mask |= chmask; 815 tmp.channels++; 816 if (chmask & SND_CHN_T_MASK_LF) 817 tmp.ext++; 818 } 819 820 if (tmp.channels != m->channels || tmp.ext != m->ext || 821 tmp.mask != m->mask || 822 tmp.map[m->channels].type != SND_CHN_T_MAX) 823 return (EINVAL); 824 825 *m = tmp; 826 827 return (0); 828 }
Cache object: 002431c692f0bc5bed1e59a2f12393f4
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]