1 /** 2 * \file pcm/pcm_route.c 3 * \ingroup PCM_Plugins 4 * \brief PCM Route & Volume Plugin Interface 5 * \author Abramo Bagnara <abramo (at) alsa-project.org> 6 * \date 2000-2001 7 */ 8 /* 9 * PCM - Route & Volume Plugin 10 * Copyright (c) 2000 by Abramo Bagnara <abramo (at) alsa-project.org> 11 * 12 * 13 * This library is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU Lesser General Public License as 15 * published by the Free Software Foundation; either version 2.1 of 16 * the License, or (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU Lesser General Public License for more details. 22 * 23 * You should have received a copy of the GNU Lesser General Public 24 * License along with this library; if not, write to the Free Software 25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 26 * 27 */ 28 29 #include <byteswap.h> 30 #include <math.h> 31 #include "pcm_local.h" 32 #include "pcm_plugin.h" 33 34 #include "plugin_ops.h" 35 36 #ifndef PIC 37 /* entry for static linking */ 38 const char *_snd_module_pcm_route = ""; 39 #endif 40 41 #ifndef DOC_HIDDEN 42 43 /* The best possible hack to support missing optimization in gcc 2.7.2.3 */ 44 #if SND_PCM_PLUGIN_ROUTE_RESOLUTION & (SND_PCM_PLUGIN_ROUTE_RESOLUTION - 1) != 0 45 #define div(a) a /= SND_PCM_PLUGIN_ROUTE_RESOLUTION 46 #elif SND_PCM_PLUGIN_ROUTE_RESOLUTION == 16 47 #define div(a) a >>= 4 48 #else 49 #error "Add some code here" 50 #endif 51 52 typedef struct { 53 int channel; 54 int as_int; 55 #if SND_PCM_PLUGIN_ROUTE_FLOAT 56 float as_float; 57 #endif 58 } snd_pcm_route_ttable_src_t; 59 60 typedef struct snd_pcm_route_ttable_dst snd_pcm_route_ttable_dst_t; 61 62 typedef struct { 63 enum {UINT32=0, UINT64=1, FLOAT=2} sum_idx; 64 unsigned int get_idx; 65 unsigned int put_idx; 66 unsigned int conv_idx; 67 int use_getput; 68 unsigned int src_size; 69 snd_pcm_format_t dst_sfmt; 70 unsigned int ndsts; 71 snd_pcm_route_ttable_dst_t *dsts; 72 } snd_pcm_route_params_t; 73 74 75 typedef void (*route_f)(const snd_pcm_channel_area_t *dst_area, 76 snd_pcm_uframes_t dst_offset, 77 const snd_pcm_channel_area_t *src_areas, 78 snd_pcm_uframes_t src_offset, 79 unsigned int src_channels, 80 snd_pcm_uframes_t frames, 81 const snd_pcm_route_ttable_dst_t *ttable, 82 const snd_pcm_route_params_t *params); 83 84 struct snd_pcm_route_ttable_dst { 85 int att; /* Attenuated */ 86 unsigned int nsrcs; 87 snd_pcm_route_ttable_src_t* srcs; 88 route_f func; 89 }; 90 91 typedef union { 92 int32_t as_sint32; 93 int64_t as_sint64; 94 #if SND_PCM_PLUGIN_ROUTE_FLOAT 95 float as_float; 96 #endif 97 } sum_t; 98 99 typedef struct { 100 /* This field need to be the first */ 101 snd_pcm_plugin_t plug; 102 snd_pcm_format_t sformat; 103 int schannels; 104 snd_pcm_route_params_t params; 105 } snd_pcm_route_t; 106 107 #endif /* DOC_HIDDEN */ 108 109 static void snd_pcm_route_convert1_zero(const snd_pcm_channel_area_t *dst_area, 110 snd_pcm_uframes_t dst_offset, 111 const snd_pcm_channel_area_t *src_areas ATTRIBUTE_UNUSED, 112 snd_pcm_uframes_t src_offset ATTRIBUTE_UNUSED, 113 unsigned int src_channels ATTRIBUTE_UNUSED, 114 snd_pcm_uframes_t frames, 115 const snd_pcm_route_ttable_dst_t* ttable ATTRIBUTE_UNUSED, 116 const snd_pcm_route_params_t *params) 117 { 118 snd_pcm_area_silence(dst_area, dst_offset, frames, params->dst_sfmt); 119 } 120 121 #ifndef DOC_HIDDEN 122 123 static void snd_pcm_route_convert1_one(const snd_pcm_channel_area_t *dst_area, 124 snd_pcm_uframes_t dst_offset, 125 const snd_pcm_channel_area_t *src_areas, 126 snd_pcm_uframes_t src_offset, 127 unsigned int src_channels, 128 snd_pcm_uframes_t frames, 129 const snd_pcm_route_ttable_dst_t* ttable, 130 const snd_pcm_route_params_t *params) 131 { 132 #define CONV_LABELS 133 #include "plugin_ops.h" 134 #undef CONV_LABELS 135 void *conv; 136 const snd_pcm_channel_area_t *src_area = 0; 137 unsigned int srcidx; 138 const char *src; 139 char *dst; 140 int src_step, dst_step; 141 for (srcidx = 0; srcidx < ttable->nsrcs && srcidx < src_channels; ++srcidx) { 142 unsigned int channel = ttable->srcs[srcidx].channel; 143 if (channel >= src_channels) 144 continue; 145 src_area = &src_areas[channel]; 146 if (src_area->addr != NULL) 147 break; 148 } 149 if (srcidx == ttable->nsrcs || srcidx == src_channels) { 150 snd_pcm_route_convert1_zero(dst_area, dst_offset, 151 src_areas, src_offset, 152 src_channels, 153 frames, ttable, params); 154 return; 155 } 156 157 conv = conv_labels[params->conv_idx]; 158 src = snd_pcm_channel_area_addr(src_area, src_offset); 159 dst = snd_pcm_channel_area_addr(dst_area, dst_offset); 160 src_step = snd_pcm_channel_area_step(src_area); 161 dst_step = snd_pcm_channel_area_step(dst_area); 162 while (frames-- > 0) { 163 goto *conv; 164 #define CONV_END after 165 #include "plugin_ops.h" 166 #undef CONV_END 167 after: 168 src += src_step; 169 dst += dst_step; 170 } 171 } 172 173 static void snd_pcm_route_convert1_one_getput(const snd_pcm_channel_area_t *dst_area, 174 snd_pcm_uframes_t dst_offset, 175 const snd_pcm_channel_area_t *src_areas, 176 snd_pcm_uframes_t src_offset, 177 unsigned int src_channels, 178 snd_pcm_uframes_t frames, 179 const snd_pcm_route_ttable_dst_t* ttable, 180 const snd_pcm_route_params_t *params) 181 { 182 #define CONV24_LABELS 183 #include "plugin_ops.h" 184 #undef CONV24_LABELS 185 void *get, *put; 186 const snd_pcm_channel_area_t *src_area = 0; 187 unsigned int srcidx; 188 const char *src; 189 char *dst; 190 int src_step, dst_step; 191 u_int32_t sample = 0; 192 for (srcidx = 0; srcidx < ttable->nsrcs && srcidx < src_channels; ++srcidx) { 193 unsigned int channel = ttable->srcs[srcidx].channel; 194 if (channel >= src_channels) 195 continue; 196 src_area = &src_areas[channel]; 197 if (src_area->addr != NULL) 198 break; 199 } 200 if (srcidx == ttable->nsrcs || srcidx == src_channels) { 201 snd_pcm_route_convert1_zero(dst_area, dst_offset, 202 src_areas, src_offset, 203 src_channels, 204 frames, ttable, params); 205 return; 206 } 207 208 get = get32_labels[params->get_idx]; 209 put = put32_labels[params->put_idx]; 210 src = snd_pcm_channel_area_addr(src_area, src_offset); 211 dst = snd_pcm_channel_area_addr(dst_area, dst_offset); 212 src_step = snd_pcm_channel_area_step(src_area); 213 dst_step = snd_pcm_channel_area_step(dst_area); 214 while (frames-- > 0) { 215 goto *get; 216 #define CONV24_END after 217 #include "plugin_ops.h" 218 #undef CONV24_END 219 after: 220 src += src_step; 221 dst += dst_step; 222 } 223 } 224 225 static void snd_pcm_route_convert1_many(const snd_pcm_channel_area_t *dst_area, 226 snd_pcm_uframes_t dst_offset, 227 const snd_pcm_channel_area_t *src_areas, 228 snd_pcm_uframes_t src_offset, 229 unsigned int src_channels, 230 snd_pcm_uframes_t frames, 231 const snd_pcm_route_ttable_dst_t* ttable, 232 const snd_pcm_route_params_t *params) 233 { 234 #define GETS_LABELS 235 #define PUT32_LABELS 236 #include "plugin_ops.h" 237 #undef GETS_LABELS 238 #undef PUT32_LABELS 239 static void *const zero_labels[3] = { 240 &&zero_int32, &&zero_int64, 241 #if SND_PCM_PLUGIN_ROUTE_FLOAT 242 &&zero_float 243 #endif 244 }; 245 /* sum_type att */ 246 static void *const add_labels[3 * 2] = { 247 &&add_int32_noatt, &&add_int32_att, 248 &&add_int64_noatt, &&add_int64_att, 249 #if SND_PCM_PLUGIN_ROUTE_FLOAT 250 &&add_float_noatt, &&add_float_att 251 #endif 252 }; 253 /* sum_type att shift */ 254 static void *const norm_labels[3 * 2 * 4] = { 255 0, 256 &&norm_int32_8_noatt, 257 &&norm_int32_16_noatt, 258 &&norm_int32_24_noatt, 259 0, 260 &&norm_int32_8_att, 261 &&norm_int32_16_att, 262 &&norm_int32_24_att, 263 &&norm_int64_0_noatt, 264 &&norm_int64_8_noatt, 265 &&norm_int64_16_noatt, 266 &&norm_int64_24_noatt, 267 &&norm_int64_0_att, 268 &&norm_int64_8_att, 269 &&norm_int64_16_att, 270 &&norm_int64_24_att, 271 #if SND_PCM_PLUGIN_ROUTE_FLOAT 272 &&norm_float_0, 273 &&norm_float_8, 274 &&norm_float_16, 275 &&norm_float_24, 276 &&norm_float_0, 277 &&norm_float_8, 278 &&norm_float_16, 279 &&norm_float_24, 280 #endif 281 }; 282 void *zero, *get, *add, *norm, *put32; 283 int nsrcs = ttable->nsrcs; 284 char *dst; 285 int dst_step; 286 const char *srcs[nsrcs]; 287 int src_steps[nsrcs]; 288 snd_pcm_route_ttable_src_t src_tt[nsrcs]; 289 int32_t sample = 0; 290 int srcidx, srcidx1 = 0; 291 for (srcidx = 0; srcidx < nsrcs && (unsigned)srcidx < src_channels; ++srcidx) { 292 const snd_pcm_channel_area_t *src_area; 293 unsigned int channel = ttable->srcs[srcidx].channel; 294 if (channel >= src_channels) 295 continue; 296 src_area = &src_areas[channel]; 297 srcs[srcidx1] = snd_pcm_channel_area_addr(src_area, src_offset); 298 src_steps[srcidx1] = snd_pcm_channel_area_step(src_area); 299 src_tt[srcidx1] = ttable->srcs[srcidx]; 300 srcidx1++; 301 } 302 nsrcs = srcidx1; 303 if (nsrcs == 0) { 304 snd_pcm_route_convert1_zero(dst_area, dst_offset, 305 src_areas, src_offset, 306 src_channels, 307 frames, ttable, params); 308 return; 309 } else if (nsrcs == 1 && src_tt[0].as_int == SND_PCM_PLUGIN_ROUTE_RESOLUTION) { 310 if (params->use_getput) 311 snd_pcm_route_convert1_one_getput(dst_area, dst_offset, 312 src_areas, src_offset, 313 src_channels, 314 frames, ttable, params); 315 else 316 snd_pcm_route_convert1_one(dst_area, dst_offset, 317 src_areas, src_offset, 318 src_channels, 319 frames, ttable, params); 320 return; 321 } 322 323 zero = zero_labels[params->sum_idx]; 324 get = gets_labels[params->get_idx]; 325 add = add_labels[params->sum_idx * 2 + ttable->att]; 326 norm = norm_labels[params->sum_idx * 8 + ttable->att * 4 + 4 - params->src_size]; 327 put32 = put32_labels[params->put_idx]; 328 dst = snd_pcm_channel_area_addr(dst_area, dst_offset); 329 dst_step = snd_pcm_channel_area_step(dst_area); 330 331 while (frames-- > 0) { 332 snd_pcm_route_ttable_src_t *ttp = src_tt; 333 sum_t sum; 334 335 /* Zero sum */ 336 goto *zero; 337 zero_int32: 338 sum.as_sint32 = 0; 339 goto zero_end; 340 zero_int64: 341 sum.as_sint64 = 0; 342 goto zero_end; 343 #if SND_PCM_PLUGIN_ROUTE_FLOAT 344 zero_float: 345 sum.as_float = 0.0; 346 goto zero_end; 347 #endif 348 zero_end: 349 for (srcidx = 0; srcidx < nsrcs; ++srcidx) { 350 const char *src = srcs[srcidx]; 351 352 /* Get sample */ 353 goto *get; 354 #define GETS_END after_get 355 #include "plugin_ops.h" 356 #undef GETS_END 357 after_get: 358 359 /* Sum */ 360 goto *add; 361 add_int32_att: 362 sum.as_sint32 += sample * ttp->as_int; 363 goto after_sum; 364 add_int32_noatt: 365 if (ttp->as_int) 366 sum.as_sint32 += sample; 367 goto after_sum; 368 add_int64_att: 369 sum.as_sint64 += (int64_t) sample * ttp->as_int; 370 goto after_sum; 371 add_int64_noatt: 372 if (ttp->as_int) 373 sum.as_sint64 += sample; 374 goto after_sum; 375 #if SND_PCM_PLUGIN_ROUTE_FLOAT 376 add_float_att: 377 sum.as_float += sample * ttp->as_float; 378 goto after_sum; 379 add_float_noatt: 380 if (ttp->as_int) 381 sum.as_float += sample; 382 goto after_sum; 383 #endif 384 after_sum: 385 srcs[srcidx] += src_steps[srcidx]; 386 ttp++; 387 } 388 389 /* Normalization */ 390 goto *norm; 391 norm_int32_8_att: 392 sum.as_sint64 = sum.as_sint32; 393 norm_int64_8_att: 394 sum.as_sint64 <<= 8; 395 norm_int64_0_att: 396 div(sum.as_sint64); 397 goto norm_int; 398 399 norm_int32_16_att: 400 sum.as_sint64 = sum.as_sint32; 401 norm_int64_16_att: 402 sum.as_sint64 <<= 16; 403 div(sum.as_sint64); 404 goto norm_int; 405 406 norm_int32_24_att: 407 sum.as_sint64 = sum.as_sint32; 408 norm_int64_24_att: 409 sum.as_sint64 <<= 24; 410 div(sum.as_sint64); 411 goto norm_int; 412 413 norm_int32_8_noatt: 414 sum.as_sint64 = sum.as_sint32; 415 norm_int64_8_noatt: 416 sum.as_sint64 <<= 8; 417 goto norm_int; 418 419 norm_int32_16_noatt: 420 sum.as_sint64 = sum.as_sint32; 421 norm_int64_16_noatt: 422 sum.as_sint64 <<= 16; 423 goto norm_int; 424 425 norm_int32_24_noatt: 426 sum.as_sint64 = sum.as_sint32; 427 norm_int64_24_noatt: 428 sum.as_sint64 <<= 24; 429 goto norm_int; 430 431 norm_int64_0_noatt: 432 norm_int: 433 if (sum.as_sint64 > (int64_t)0x7fffffff) 434 sample = 0x7fffffff; /* maximum positive value */ 435 else if (sum.as_sint64 < -(int64_t)0x80000000) 436 sample = 0x80000000; /* maximum negative value */ 437 else 438 sample = sum.as_sint64; 439 goto after_norm; 440 441 #if SND_PCM_PLUGIN_ROUTE_FLOAT 442 norm_float_8: 443 sum.as_float *= 1 << 8; 444 goto norm_float; 445 norm_float_16: 446 sum.as_float *= 1 << 16; 447 goto norm_float; 448 norm_float_24: 449 sum.as_float *= 1 << 24; 450 goto norm_float; 451 norm_float_0: 452 norm_float: 453 sum.as_float = rint(sum.as_float); 454 if (sum.as_float > (int64_t)0x7fffffff) 455 sample = 0x7fffffff; /* maximum positive value */ 456 else if (sum.as_float < -(int64_t)0x80000000) 457 sample = 0x80000000; /* maximum negative value */ 458 else 459 sample = sum.as_float; 460 goto after_norm; 461 #endif 462 after_norm: 463 464 /* Put sample */ 465 goto *put32; 466 #define PUT32_END after_put32 467 #include "plugin_ops.h" 468 #undef PUT32_END 469 after_put32: 470 471 dst += dst_step; 472 } 473 } 474 475 #endif /* DOC_HIDDEN */ 476 477 static void snd_pcm_route_convert(const snd_pcm_channel_area_t *dst_areas, 478 snd_pcm_uframes_t dst_offset, 479 const snd_pcm_channel_area_t *src_areas, 480 snd_pcm_uframes_t src_offset, 481 unsigned int src_channels, 482 unsigned int dst_channels, 483 snd_pcm_uframes_t frames, 484 snd_pcm_route_params_t *params) 485 { 486 unsigned int dst_channel; 487 snd_pcm_route_ttable_dst_t *dstp; 488 const snd_pcm_channel_area_t *dst_area; 489 490 dstp = params->dsts; 491 dst_area = dst_areas; 492 for (dst_channel = 0; dst_channel < dst_channels; ++dst_channel) { 493 if (dst_channel >= params->ndsts) 494 snd_pcm_route_convert1_zero(dst_area, dst_offset, 495 src_areas, src_offset, 496 src_channels, 497 frames, dstp, params); 498 else 499 dstp->func(dst_area, dst_offset, 500 src_areas, src_offset, 501 src_channels, 502 frames, dstp, params); 503 dstp++; 504 dst_area++; 505 } 506 } 507 508 static int snd_pcm_route_close(snd_pcm_t *pcm) 509 { 510 snd_pcm_route_t *route = pcm->private_data; 511 snd_pcm_route_params_t *params = &route->params; 512 unsigned int dst_channel; 513 514 if (params->dsts) { 515 for (dst_channel = 0; dst_channel < params->ndsts; ++dst_channel) { 516 free(params->dsts[dst_channel].srcs); 517 } 518 free(params->dsts); 519 } 520 return snd_pcm_generic_close(pcm); 521 } 522 523 static int snd_pcm_route_hw_refine_cprepare(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_hw_params_t *params) 524 { 525 int err; 526 snd_pcm_access_mask_t access_mask = { SND_PCM_ACCBIT_SHM }; 527 snd_pcm_format_mask_t format_mask = { SND_PCM_FMTBIT_LINEAR }; 528 err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_ACCESS, 529 &access_mask); 530 if (err < 0) 531 return err; 532 err = _snd_pcm_hw_param_set_mask(params, SND_PCM_HW_PARAM_FORMAT, 533 &format_mask); 534 if (err < 0) 535 return err; 536 err = _snd_pcm_hw_params_set_subformat(params, SND_PCM_SUBFORMAT_STD); 537 if (err < 0) 538 return err; 539 err = _snd_pcm_hw_param_set_min(params, SND_PCM_HW_PARAM_CHANNELS, 1, 0); 540 if (err < 0) 541 return err; 542 params->info &= ~(SND_PCM_INFO_MMAP | SND_PCM_INFO_MMAP_VALID); 543 return 0; 544 } 545 546 static int snd_pcm_route_hw_refine_sprepare(snd_pcm_t *pcm, snd_pcm_hw_params_t *sparams) 547 { 548 snd_pcm_route_t *route = pcm->private_data; 549 snd_pcm_access_mask_t saccess_mask = { SND_PCM_ACCBIT_MMAP }; 550 _snd_pcm_hw_params_any(sparams); 551 _snd_pcm_hw_param_set_mask(sparams, SND_PCM_HW_PARAM_ACCESS, 552 &saccess_mask); 553 if (route->sformat != SND_PCM_FORMAT_UNKNOWN) { 554 _snd_pcm_hw_params_set_format(sparams, route->sformat); 555 _snd_pcm_hw_params_set_subformat(sparams, SND_PCM_SUBFORMAT_STD); 556 } 557 if (route->schannels >= 0) { 558 _snd_pcm_hw_param_set(sparams, SND_PCM_HW_PARAM_CHANNELS, 559 (unsigned int) route->schannels, 0); 560 } 561 return 0; 562 } 563 564 static int snd_pcm_route_hw_refine_schange(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, 565 snd_pcm_hw_params_t *sparams) 566 { 567 snd_pcm_route_t *route = pcm->private_data; 568 int err; 569 unsigned int links = (SND_PCM_HW_PARBIT_RATE | 570 SND_PCM_HW_PARBIT_PERIODS | 571 SND_PCM_HW_PARBIT_PERIOD_SIZE | 572 SND_PCM_HW_PARBIT_PERIOD_TIME | 573 SND_PCM_HW_PARBIT_BUFFER_SIZE | 574 SND_PCM_HW_PARBIT_BUFFER_TIME | 575 SND_PCM_HW_PARBIT_TICK_TIME); 576 if (route->sformat == SND_PCM_FORMAT_UNKNOWN) 577 links |= (SND_PCM_HW_PARBIT_FORMAT | 578 SND_PCM_HW_PARBIT_SUBFORMAT | 579 SND_PCM_HW_PARBIT_SAMPLE_BITS); 580 if (route->schannels < 0) 581 links |= SND_PCM_HW_PARBIT_CHANNELS; 582 err = _snd_pcm_hw_params_refine(sparams, links, params); 583 if (err < 0) 584 return err; 585 return 0; 586 } 587 588 static int snd_pcm_route_hw_refine_cchange(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, 589 snd_pcm_hw_params_t *sparams) 590 { 591 snd_pcm_route_t *route = pcm->private_data; 592 int err; 593 unsigned int links = (SND_PCM_HW_PARBIT_RATE | 594 SND_PCM_HW_PARBIT_PERIODS | 595 SND_PCM_HW_PARBIT_PERIOD_SIZE | 596 SND_PCM_HW_PARBIT_PERIOD_TIME | 597 SND_PCM_HW_PARBIT_BUFFER_SIZE | 598 SND_PCM_HW_PARBIT_BUFFER_TIME | 599 SND_PCM_HW_PARBIT_TICK_TIME); 600 if (route->sformat == SND_PCM_FORMAT_UNKNOWN) 601 links |= (SND_PCM_HW_PARBIT_FORMAT | 602 SND_PCM_HW_PARBIT_SUBFORMAT | 603 SND_PCM_HW_PARBIT_SAMPLE_BITS); 604 if (route->schannels < 0) 605 links |= SND_PCM_HW_PARBIT_CHANNELS; 606 err = _snd_pcm_hw_params_refine(params, links, sparams); 607 if (err < 0) 608 return err; 609 return 0; 610 } 611 612 static int snd_pcm_route_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params) 613 { 614 return snd_pcm_hw_refine_slave(pcm, params, 615 snd_pcm_route_hw_refine_cprepare, 616 snd_pcm_route_hw_refine_cchange, 617 snd_pcm_route_hw_refine_sprepare, 618 snd_pcm_route_hw_refine_schange, 619 snd_pcm_generic_hw_refine); 620 } 621 622 static int snd_pcm_route_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t * params) 623 { 624 snd_pcm_route_t *route = pcm->private_data; 625 snd_pcm_t *slave = route->plug.gen.slave; 626 snd_pcm_format_t src_format, dst_format; 627 int err = snd_pcm_hw_params_slave(pcm, params, 628 snd_pcm_route_hw_refine_cchange, 629 snd_pcm_route_hw_refine_sprepare, 630 snd_pcm_route_hw_refine_schange, 631 snd_pcm_generic_hw_params); 632 if (err < 0) 633 return err; 634 635 if (pcm->stream == SND_PCM_STREAM_PLAYBACK) { 636 err = INTERNAL(snd_pcm_hw_params_get_format)(params, &src_format); 637 dst_format = slave->format; 638 } else { 639 src_format = slave->format; 640 err = INTERNAL(snd_pcm_hw_params_get_format)(params, &dst_format); 641 } 642 if (err < 0) 643 return err; 644 route->params.use_getput = snd_pcm_format_physical_width(src_format) == 24 || 645 snd_pcm_format_physical_width(dst_format) == 24; 646 route->params.get_idx = snd_pcm_linear_get_index(src_format, SND_PCM_FORMAT_S16); 647 route->params.put_idx = snd_pcm_linear_put32_index(SND_PCM_FORMAT_S32, dst_format); 648 route->params.conv_idx = snd_pcm_linear_convert_index(src_format, dst_format); 649 route->params.src_size = snd_pcm_format_width(src_format) / 8; 650 route->params.dst_sfmt = dst_format; 651 #if SND_PCM_PLUGIN_ROUTE_FLOAT 652 route->params.sum_idx = FLOAT; 653 #else 654 if (snd_pcm_format_width(src_format) == 32) 655 route->params.sum_idx = UINT64; 656 else 657 route->params.sum_idx = UINT32; 658 #endif 659 return 0; 660 } 661 662 static snd_pcm_uframes_t 663 snd_pcm_route_write_areas(snd_pcm_t *pcm, 664 const snd_pcm_channel_area_t *areas, 665 snd_pcm_uframes_t offset, 666 snd_pcm_uframes_t size, 667 const snd_pcm_channel_area_t *slave_areas, 668 snd_pcm_uframes_t slave_offset, 669 snd_pcm_uframes_t *slave_sizep) 670 { 671 snd_pcm_route_t *route = pcm->private_data; 672 snd_pcm_t *slave = route->plug.gen.slave; 673 if (size > *slave_sizep) 674 size = *slave_sizep; 675 snd_pcm_route_convert(slave_areas, slave_offset, 676 areas, offset, 677 pcm->channels, 678 slave->channels, 679 size, &route->params); 680 *slave_sizep = size; 681 return size; 682 } 683 684 static snd_pcm_uframes_t 685 snd_pcm_route_read_areas(snd_pcm_t *pcm, 686 const snd_pcm_channel_area_t *areas, 687 snd_pcm_uframes_t offset, 688 snd_pcm_uframes_t size, 689 const snd_pcm_channel_area_t *slave_areas, 690 snd_pcm_uframes_t slave_offset, 691 snd_pcm_uframes_t *slave_sizep) 692 { 693 snd_pcm_route_t *route = pcm->private_data; 694 snd_pcm_t *slave = route->plug.gen.slave; 695 if (size > *slave_sizep) 696 size = *slave_sizep; 697 snd_pcm_route_convert(areas, offset, 698 slave_areas, slave_offset, 699 slave->channels, 700 pcm->channels, 701 size, &route->params); 702 *slave_sizep = size; 703 return size; 704 } 705 706 static void snd_pcm_route_dump(snd_pcm_t *pcm, snd_output_t *out) 707 { 708 snd_pcm_route_t *route = pcm->private_data; 709 unsigned int dst; 710 if (route->sformat == SND_PCM_FORMAT_UNKNOWN) 711 snd_output_printf(out, "Route conversion PCM\n"); 712 else 713 snd_output_printf(out, "Route conversion PCM (sformat=%s)\n", 714 snd_pcm_format_name(route->sformat)); 715 snd_output_puts(out, " Transformation table:\n"); 716 for (dst = 0; dst < route->params.ndsts; dst++) { 717 snd_pcm_route_ttable_dst_t *d = &route->params.dsts[dst]; 718 unsigned int src; 719 snd_output_printf(out, " %d <- ", dst); 720 if (d->nsrcs == 0) { 721 snd_output_printf(out, "none\n"); 722 continue; 723 } 724 src = 0; 725 while (1) { 726 snd_pcm_route_ttable_src_t *s = &d->srcs[src]; 727 if (d->att) 728 #if SND_PCM_PLUGIN_ROUTE_FLOAT 729 snd_output_printf(out, "%d*%g", s->channel, s->as_float); 730 #else 731 snd_output_printf(out, "%d*%g", s->channel, (double)s->as_int / (double)SND_PCM_PLUGIN_ROUTE_RESOLUTION); 732 #endif 733 else 734 snd_output_printf(out, "%d", s->channel); 735 src++; 736 if (src == d->nsrcs) 737 break; 738 snd_output_puts(out, " + "); 739 } 740 snd_output_putc(out, '\n'); 741 } 742 if (pcm->setup) { 743 snd_output_printf(out, "Its setup is:\n"); 744 snd_pcm_dump_setup(pcm, out); 745 } 746 snd_output_printf(out, "Slave: "); 747 snd_pcm_dump(route->plug.gen.slave, out); 748 } 749 750 static const snd_pcm_ops_t snd_pcm_route_ops = { 751 .close = snd_pcm_route_close, 752 .info = snd_pcm_generic_info, 753 .hw_refine = snd_pcm_route_hw_refine, 754 .hw_params = snd_pcm_route_hw_params, 755 .hw_free = snd_pcm_generic_hw_free, 756 .sw_params = snd_pcm_generic_sw_params, 757 .channel_info = snd_pcm_generic_channel_info, 758 .dump = snd_pcm_route_dump, 759 .nonblock = snd_pcm_generic_nonblock, 760 .async = snd_pcm_generic_async, 761 .mmap = snd_pcm_generic_mmap, 762 .munmap = snd_pcm_generic_munmap, 763 }; 764 765 static int route_load_ttable(snd_pcm_route_params_t *params, snd_pcm_stream_t stream, 766 unsigned int tt_ssize, 767 snd_pcm_route_ttable_entry_t *ttable, 768 unsigned int tt_cused, unsigned int tt_sused) 769 { 770 unsigned int src_channel, dst_channel; 771 snd_pcm_route_ttable_dst_t *dptr; 772 unsigned int sused, dused, smul, dmul; 773 if (stream == SND_PCM_STREAM_PLAYBACK) { 774 sused = tt_cused; 775 dused = tt_sused; 776 smul = tt_ssize; 777 dmul = 1; 778 } else { 779 sused = tt_sused; 780 dused = tt_cused; 781 smul = 1; 782 dmul = tt_ssize; 783 } 784 params->ndsts = dused; 785 dptr = calloc(dused, sizeof(*params->dsts)); 786 if (!dptr) 787 return -ENOMEM; 788 params->dsts = dptr; 789 for (dst_channel = 0; dst_channel < dused; ++dst_channel) { 790 snd_pcm_route_ttable_entry_t t = 0; 791 int att = 0; 792 int nsrcs = 0; 793 snd_pcm_route_ttable_src_t srcs[sused]; 794 for (src_channel = 0; src_channel < sused; ++src_channel) { 795 snd_pcm_route_ttable_entry_t v; 796 v = ttable[src_channel * smul + dst_channel * dmul]; 797 if (v != 0) { 798 srcs[nsrcs].channel = src_channel; 799 #if SND_PCM_PLUGIN_ROUTE_FLOAT 800 /* Also in user space for non attenuated */ 801 srcs[nsrcs].as_int = (v == SND_PCM_PLUGIN_ROUTE_FULL ? SND_PCM_PLUGIN_ROUTE_RESOLUTION : 0); 802 srcs[nsrcs].as_float = v; 803 #else 804 assert(v >= 0 && v <= SND_PCM_PLUGIN_ROUTE_FULL); 805 srcs[nsrcs].as_int = v; 806 #endif 807 if (v != SND_PCM_PLUGIN_ROUTE_FULL) 808 att = 1; 809 t += v; 810 nsrcs++; 811 } 812 } 813 #if 0 814 assert(t <= SND_PCM_PLUGIN_ROUTE_FULL); 815 #endif 816 dptr->att = att; 817 dptr->nsrcs = nsrcs; 818 if (nsrcs == 0) 819 dptr->func = snd_pcm_route_convert1_zero; 820 else 821 dptr->func = snd_pcm_route_convert1_many; 822 if (nsrcs > 0) { 823 dptr->srcs = calloc((unsigned int) nsrcs, sizeof(*srcs)); 824 if (!dptr->srcs) 825 return -ENOMEM; 826 memcpy(dptr->srcs, srcs, sizeof(*srcs) * nsrcs); 827 } else 828 dptr->srcs = 0; 829 dptr++; 830 } 831 return 0; 832 } 833 834 /** 835 * \brief Creates a new Route & Volume PCM 836 * \param pcmp Returns created PCM handle 837 * \param name Name of PCM 838 * \param sformat Slave format 839 * \param schannels Slave channels 840 * \param ttable Attenuation table 841 * \param tt_ssize Attenuation table - slave size 842 * \param tt_cused Attenuation table - client used count 843 * \param tt_sused Attenuation table - slave used count 844 * \param slave Slave PCM handle 845 * \param close_slave When set, the slave PCM handle is closed with copy PCM 846 * \retval zero on success otherwise a negative error code 847 * \warning Using of this function might be dangerous in the sense 848 * of compatibility reasons. The prototype might be freely 849 * changed in future. 850 */ 851 int snd_pcm_route_open(snd_pcm_t **pcmp, const char *name, 852 snd_pcm_format_t sformat, int schannels, 853 snd_pcm_route_ttable_entry_t *ttable, 854 unsigned int tt_ssize, 855 unsigned int tt_cused, unsigned int tt_sused, 856 snd_pcm_t *slave, int close_slave) 857 { 858 snd_pcm_t *pcm; 859 snd_pcm_route_t *route; 860 int err; 861 assert(pcmp && slave && ttable); 862 if (sformat != SND_PCM_FORMAT_UNKNOWN && 863 snd_pcm_format_linear(sformat) != 1) 864 return -EINVAL; 865 route = calloc(1, sizeof(snd_pcm_route_t)); 866 if (!route) { 867 return -ENOMEM; 868 } 869 snd_pcm_plugin_init(&route->plug); 870 route->sformat = sformat; 871 route->schannels = schannels; 872 route->plug.read = snd_pcm_route_read_areas; 873 route->plug.write = snd_pcm_route_write_areas; 874 route->plug.undo_read = snd_pcm_plugin_undo_read_generic; 875 route->plug.undo_write = snd_pcm_plugin_undo_write_generic; 876 route->plug.gen.slave = slave; 877 route->plug.gen.close_slave = close_slave; 878 879 err = snd_pcm_new(&pcm, SND_PCM_TYPE_ROUTE, name, slave->stream, slave->mode); 880 if (err < 0) { 881 free(route); 882 return err; 883 } 884 pcm->ops = &snd_pcm_route_ops; 885 pcm->fast_ops = &snd_pcm_plugin_fast_ops; 886 pcm->private_data = route; 887 pcm->poll_fd = slave->poll_fd; 888 pcm->poll_events = slave->poll_events; 889 pcm->monotonic = slave->monotonic; 890 snd_pcm_set_hw_ptr(pcm, &route->plug.hw_ptr, -1, 0); 891 snd_pcm_set_appl_ptr(pcm, &route->plug.appl_ptr, -1, 0); 892 err = route_load_ttable(&route->params, pcm->stream, tt_ssize, ttable, tt_cused, tt_sused); 893 if (err < 0) { 894 snd_pcm_close(pcm); 895 return err; 896 } 897 *pcmp = pcm; 898 899 return 0; 900 } 901 902 /** 903 * \brief Determine route matrix sizes 904 * \param tt Configuration root describing route matrix 905 * \param tt_csize Returned client size in elements 906 * \param tt_ssize Returned slave size in elements 907 * \retval zero on success otherwise a negative error code 908 */ 909 int snd_pcm_route_determine_ttable(snd_config_t *tt, 910 unsigned int *tt_csize, 911 unsigned int *tt_ssize) 912 { 913 snd_config_iterator_t i, inext; 914 long csize = 0, ssize = 0; 915 int err; 916 917 assert(tt && tt_csize && tt_ssize); 918 snd_config_for_each(i, inext, tt) { 919 snd_config_t *in = snd_config_iterator_entry(i); 920 snd_config_iterator_t j, jnext; 921 long cchannel; 922 const char *id; 923 if (!snd_config_get_id(in, &id) < 0) 924 continue; 925 err = safe_strtol(id, &cchannel); 926 if (err < 0) { 927 SNDERR("Invalid client channel: %s", id); 928 return -EINVAL; 929 } 930 if (cchannel + 1 > csize) 931 csize = cchannel + 1; 932 if (snd_config_get_type(in) != SND_CONFIG_TYPE_COMPOUND) 933 return -EINVAL; 934 snd_config_for_each(j, jnext, in) { 935 snd_config_t *jnode = snd_config_iterator_entry(j); 936 long schannel; 937 const char *id; 938 if (snd_config_get_id(jnode, &id) < 0) 939 continue; 940 err = safe_strtol(id, &schannel); 941 if (err < 0) { 942 SNDERR("Invalid slave channel: %s", id); 943 return -EINVAL; 944 } 945 if (schannel + 1 > ssize) 946 ssize = schannel + 1; 947 } 948 } 949 if (csize == 0 || ssize == 0) { 950 SNDERR("Invalid null ttable configuration"); 951 return -EINVAL; 952 } 953 *tt_csize = csize; 954 *tt_ssize = ssize; 955 return 0; 956 } 957 958 /** 959 * \brief Load route matrix 960 * \param tt Configuration root describing route matrix 961 * \param ttable Returned route matrix 962 * \param tt_csize Client size in elements 963 * \param tt_ssize Slave size in elements 964 * \param tt_cused Used client elements 965 * \param tt_sused Used slave elements 966 * \param schannels Slave channels 967 * \retval zero on success otherwise a negative error code 968 */ 969 int snd_pcm_route_load_ttable(snd_config_t *tt, snd_pcm_route_ttable_entry_t *ttable, 970 unsigned int tt_csize, unsigned int tt_ssize, 971 unsigned int *tt_cused, unsigned int *tt_sused, 972 int schannels) 973 { 974 int cused = -1; 975 int sused = -1; 976 snd_config_iterator_t i, inext; 977 unsigned int k; 978 int err; 979 for (k = 0; k < tt_csize * tt_ssize; ++k) 980 ttable[k] = 0.0; 981 snd_config_for_each(i, inext, tt) { 982 snd_config_t *in = snd_config_iterator_entry(i); 983 snd_config_iterator_t j, jnext; 984 long cchannel; 985 const char *id; 986 if (!snd_config_get_id(in, &id) < 0) 987 continue; 988 err = safe_strtol(id, &cchannel); 989 if (err < 0 || 990 cchannel < 0 || (unsigned int) cchannel > tt_csize) { 991 SNDERR("Invalid client channel: %s", id); 992 return -EINVAL; 993 } 994 if (snd_config_get_type(in) != SND_CONFIG_TYPE_COMPOUND) 995 return -EINVAL; 996 snd_config_for_each(j, jnext, in) { 997 snd_config_t *jnode = snd_config_iterator_entry(j); 998 double value; 999 long schannel; 1000 const char *id; 1001 if (snd_config_get_id(jnode, &id) < 0) 1002 continue; 1003 err = safe_strtol(id, &schannel); 1004 if (err < 0 || 1005 schannel < 0 || (unsigned int) schannel > tt_ssize || 1006 (schannels > 0 && schannel >= schannels)) { 1007 SNDERR("Invalid slave channel: %s", id); 1008 return -EINVAL; 1009 } 1010 err = snd_config_get_real(jnode, &value); 1011 if (err < 0) { 1012 long v; 1013 err = snd_config_get_integer(jnode, &v); 1014 if (err < 0) { 1015 SNDERR("Invalid type for %s", id); 1016 return -EINVAL; 1017 } 1018 value = v; 1019 } 1020 ttable[cchannel * tt_ssize + schannel] = value; 1021 if (schannel > sused) 1022 sused = schannel; 1023 } 1024 if (cchannel > cused) 1025 cused = cchannel; 1026 } 1027 *tt_sused = sused + 1; 1028 *tt_cused = cused + 1; 1029 return 0; 1030 } 1031 1032 /*! \page pcm_plugins 1033 1034 \section pcm_plugins_route Plugin: Route & Volume 1035 1036 This plugin converts channels and applies volume during the conversion. 1037 The format and rate must match for both of them. 1038 1039 \code 1040 pcm.name { 1041 type route # Route & Volume conversion PCM 1042 slave STR # Slave name 1043 # or 1044 slave { # Slave definition 1045 pcm STR # Slave PCM name 1046 # or 1047 pcm { } # Slave PCM definition 1048 [format STR] # Slave format 1049 [channels INT] # Slave channels 1050 } 1051 ttable { # Transfer table (bi-dimensional compound of cchannels * schannels numbers) 1052 CCHANNEL { 1053 SCHANNEL REAL # route value (0.0 - 1.0) 1054 } 1055 } 1056 } 1057 \endcode 1058 1059 \subsection pcm_plugins_route_funcref Function reference 1060 1061 <UL> 1062 <LI>snd_pcm_route_open() 1063 <LI>_snd_pcm_route_open() 1064 </UL> 1065 1066 */ 1067 1068 /** 1069 * \brief Creates a new Route & Volume PCM 1070 * \param pcmp Returns created PCM handle 1071 * \param name Name of PCM 1072 * \param root Root configuration node 1073 * \param conf Configuration node with Route & Volume PCM description 1074 * \param stream Stream type 1075 * \param mode Stream mode 1076 * \retval zero on success otherwise a negative error code 1077 * \warning Using of this function might be dangerous in the sense 1078 * of compatibility reasons. The prototype might be freely 1079 * changed in future. 1080 */ 1081 int _snd_pcm_route_open(snd_pcm_t **pcmp, const char *name, 1082 snd_config_t *root, snd_config_t *conf, 1083 snd_pcm_stream_t stream, int mode) 1084 { 1085 snd_config_iterator_t i, next; 1086 int err; 1087 snd_pcm_t *spcm; 1088 snd_config_t *slave = NULL, *sconf; 1089 snd_pcm_format_t sformat = SND_PCM_FORMAT_UNKNOWN; 1090 int schannels = -1; 1091 snd_config_t *tt = NULL; 1092 snd_pcm_route_ttable_entry_t *ttable = NULL; 1093 unsigned int csize, ssize; 1094 unsigned int cused, sused; 1095 snd_config_for_each(i, next, conf) { 1096 snd_config_t *n = snd_config_iterator_entry(i); 1097 const char *id; 1098 if (snd_config_get_id(n, &id) < 0) 1099 continue; 1100 if (snd_pcm_conf_generic_id(id)) 1101 continue; 1102 if (strcmp(id, "slave") == 0) { 1103 slave = n; 1104 continue; 1105 } 1106 if (strcmp(id, "ttable") == 0) { 1107 if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND) { 1108 SNDERR("Invalid type for %s", id); 1109 return -EINVAL; 1110 } 1111 tt = n; 1112 continue; 1113 } 1114 SNDERR("Unknown field %s", id); 1115 return -EINVAL; 1116 } 1117 if (!slave) { 1118 SNDERR("slave is not defined"); 1119 return -EINVAL; 1120 } 1121 if (!tt) { 1122 SNDERR("ttable is not defined"); 1123 return -EINVAL; 1124 } 1125 err = snd_pcm_slave_conf(root, slave, &sconf, 2, 1126 SND_PCM_HW_PARAM_FORMAT, 0, &sformat, 1127 SND_PCM_HW_PARAM_CHANNELS, 0, &schannels); 1128 if (err < 0) 1129 return err; 1130 if (sformat != SND_PCM_FORMAT_UNKNOWN && 1131 snd_pcm_format_linear(sformat) != 1) { 1132 snd_config_delete(sconf); 1133 SNDERR("slave format is not linear"); 1134 return -EINVAL; 1135 } 1136 1137 err = snd_pcm_route_determine_ttable(tt, &csize, &ssize); 1138 if (err < 0) { 1139 snd_config_delete(sconf); 1140 return err; 1141 } 1142 ttable = malloc(csize * ssize * sizeof(snd_pcm_route_ttable_entry_t)); 1143 if (ttable == NULL) { 1144 snd_config_delete(sconf); 1145 return -ENOMEM; 1146 } 1147 err = snd_pcm_route_load_ttable(tt, ttable, csize, ssize, 1148 &cused, &sused, schannels); 1149 if (err < 0) { 1150 free(ttable); 1151 snd_config_delete(sconf); 1152 return err; 1153 } 1154 1155 err = snd_pcm_open_slave(&spcm, root, sconf, stream, mode, conf); 1156 snd_config_delete(sconf); 1157 if (err < 0) { 1158 free(ttable); 1159 return err; 1160 } 1161 err = snd_pcm_route_open(pcmp, name, sformat, schannels, 1162 ttable, ssize, 1163 cused, sused, 1164 spcm, 1); 1165 free(ttable); 1166 if (err < 0) 1167 snd_pcm_close(spcm); 1168 return err; 1169 } 1170 #ifndef DOC_HIDDEN 1171 SND_DLSYM_BUILD_VERSION(_snd_pcm_route_open, SND_PCM_DLSYM_VERSION); 1172 #endif 1173
