code.delx.au - pulseaudio/blob - src/pulse/channelmap.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2005-2006 Lennart Poettering
   7   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32
  33 #include <pulse/xmalloc.h>
  34 #include <pulsecore/core-util.h>
  35 #include <pulsecore/macro.h>
  36
  37 #include "channelmap.h"
  38
  39 const char *const table[] = {
  40     [PA_CHANNEL_POSITION_MONO] = "mono",
  41
  42     [PA_CHANNEL_POSITION_FRONT_CENTER] = "front-center",
  43     [PA_CHANNEL_POSITION_FRONT_LEFT] = "front-left",
  44     [PA_CHANNEL_POSITION_FRONT_RIGHT] = "front-right",
  45
  46     [PA_CHANNEL_POSITION_REAR_CENTER] = "rear-center",
  47     [PA_CHANNEL_POSITION_REAR_LEFT] = "rear-left",
  48     [PA_CHANNEL_POSITION_REAR_RIGHT] = "rear-right",
  49
  50     [PA_CHANNEL_POSITION_LFE] = "lfe",
  51
  52     [PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "front-left-of-center",
  53     [PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "front-right-of-center",
  54
  55     [PA_CHANNEL_POSITION_SIDE_LEFT] = "side-left",
  56     [PA_CHANNEL_POSITION_SIDE_RIGHT] = "side-right",
  57
  58     [PA_CHANNEL_POSITION_AUX0] = "aux0",
  59     [PA_CHANNEL_POSITION_AUX1] = "aux1",
  60     [PA_CHANNEL_POSITION_AUX2] = "aux2",
  61     [PA_CHANNEL_POSITION_AUX3] = "aux3",
  62     [PA_CHANNEL_POSITION_AUX4] = "aux4",
  63     [PA_CHANNEL_POSITION_AUX5] = "aux5",
  64     [PA_CHANNEL_POSITION_AUX6] = "aux6",
  65     [PA_CHANNEL_POSITION_AUX7] = "aux7",
  66     [PA_CHANNEL_POSITION_AUX8] = "aux8",
  67     [PA_CHANNEL_POSITION_AUX9] = "aux9",
  68     [PA_CHANNEL_POSITION_AUX10] = "aux10",
  69     [PA_CHANNEL_POSITION_AUX11] = "aux11",
  70     [PA_CHANNEL_POSITION_AUX12] = "aux12",
  71     [PA_CHANNEL_POSITION_AUX13] = "aux13",
  72     [PA_CHANNEL_POSITION_AUX14] = "aux14",
  73     [PA_CHANNEL_POSITION_AUX15] = "aux15",
  74     [PA_CHANNEL_POSITION_AUX16] = "aux16",
  75     [PA_CHANNEL_POSITION_AUX17] = "aux17",
  76     [PA_CHANNEL_POSITION_AUX18] = "aux18",
  77     [PA_CHANNEL_POSITION_AUX19] = "aux19",
  78     [PA_CHANNEL_POSITION_AUX20] = "aux20",
  79     [PA_CHANNEL_POSITION_AUX21] = "aux21",
  80     [PA_CHANNEL_POSITION_AUX22] = "aux22",
  81     [PA_CHANNEL_POSITION_AUX23] = "aux23",
  82     [PA_CHANNEL_POSITION_AUX24] = "aux24",
  83     [PA_CHANNEL_POSITION_AUX25] = "aux25",
  84     [PA_CHANNEL_POSITION_AUX26] = "aux26",
  85     [PA_CHANNEL_POSITION_AUX27] = "aux27",
  86     [PA_CHANNEL_POSITION_AUX28] = "aux28",
  87     [PA_CHANNEL_POSITION_AUX29] = "aux29",
  88     [PA_CHANNEL_POSITION_AUX30] = "aux30",
  89     [PA_CHANNEL_POSITION_AUX31] = "aux31",
  90
  91     [PA_CHANNEL_POSITION_TOP_CENTER] = "top-center",
  92
  93     [PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center",
  94     [PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left",
  95     [PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right",
  96
  97     [PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center",
  98     [PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left",
  99     [PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right"
 100 };
 101
 102 const char *const pretty_table[] = {
 103     [PA_CHANNEL_POSITION_MONO] = "Mono",
 104
 105     [PA_CHANNEL_POSITION_FRONT_CENTER] = "Front Center",
 106     [PA_CHANNEL_POSITION_FRONT_LEFT] = "Front Left",
 107     [PA_CHANNEL_POSITION_FRONT_RIGHT] = "Front Right",
 108
 109     [PA_CHANNEL_POSITION_REAR_CENTER] = "Rear Center",
 110     [PA_CHANNEL_POSITION_REAR_LEFT] = "Rear Left",
 111     [PA_CHANNEL_POSITION_REAR_RIGHT] = "Rear Right",
 112
 113     [PA_CHANNEL_POSITION_LFE] = "Low Frequency Emmiter",
 114
 115     [PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "Front Left-of-center",
 116     [PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "Front Right-of-center",
 117
 118     [PA_CHANNEL_POSITION_SIDE_LEFT] = "Side Left",
 119     [PA_CHANNEL_POSITION_SIDE_RIGHT] = "Side Right",
 120
 121     [PA_CHANNEL_POSITION_AUX0] = "Auxiliary 0",
 122     [PA_CHANNEL_POSITION_AUX1] = "Auxiliary 1",
 123     [PA_CHANNEL_POSITION_AUX2] = "Auxiliary 2",
 124     [PA_CHANNEL_POSITION_AUX3] = "Auxiliary 3",
 125     [PA_CHANNEL_POSITION_AUX4] = "Auxiliary 4",
 126     [PA_CHANNEL_POSITION_AUX5] = "Auxiliary 5",
 127     [PA_CHANNEL_POSITION_AUX6] = "Auxiliary 6",
 128     [PA_CHANNEL_POSITION_AUX7] = "Auxiliary 7",
 129     [PA_CHANNEL_POSITION_AUX8] = "Auxiliary 8",
 130     [PA_CHANNEL_POSITION_AUX9] = "Auxiliary 9",
 131     [PA_CHANNEL_POSITION_AUX10] = "Auxiliary 10",
 132     [PA_CHANNEL_POSITION_AUX11] = "Auxiliary 11",
 133     [PA_CHANNEL_POSITION_AUX12] = "Auxiliary 12",
 134     [PA_CHANNEL_POSITION_AUX13] = "Auxiliary 13",
 135     [PA_CHANNEL_POSITION_AUX14] = "Auxiliary 14",
 136     [PA_CHANNEL_POSITION_AUX15] = "Auxiliary 15",
 137     [PA_CHANNEL_POSITION_AUX16] = "Auxiliary 16",
 138     [PA_CHANNEL_POSITION_AUX17] = "Auxiliary 17",
 139     [PA_CHANNEL_POSITION_AUX18] = "Auxiliary 18",
 140     [PA_CHANNEL_POSITION_AUX19] = "Auxiliary 19",
 141     [PA_CHANNEL_POSITION_AUX20] = "Auxiliary 20",
 142     [PA_CHANNEL_POSITION_AUX21] = "Auxiliary 21",
 143     [PA_CHANNEL_POSITION_AUX22] = "Auxiliary 22",
 144     [PA_CHANNEL_POSITION_AUX23] = "Auxiliary 23",
 145     [PA_CHANNEL_POSITION_AUX24] = "Auxiliary 24",
 146     [PA_CHANNEL_POSITION_AUX25] = "Auxiliary 25",
 147     [PA_CHANNEL_POSITION_AUX26] = "Auxiliary 26",
 148     [PA_CHANNEL_POSITION_AUX27] = "Auxiliary 27",
 149     [PA_CHANNEL_POSITION_AUX28] = "Auxiliary 28",
 150     [PA_CHANNEL_POSITION_AUX29] = "Auxiliary 29",
 151     [PA_CHANNEL_POSITION_AUX30] = "Auxiliary 30",
 152     [PA_CHANNEL_POSITION_AUX31] = "Auxiliary 31",
 153
 154     [PA_CHANNEL_POSITION_TOP_CENTER] = "Top Center",
 155
 156     [PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "Top Front Center",
 157     [PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "Top Front Left",
 158     [PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "Top Front Right",
 159
 160     [PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "Top Rear Center",
 161     [PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "Top Rear left",
 162     [PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "Top Rear Right"
 163 };
 164
 165 pa_channel_map* pa_channel_map_init(pa_channel_map *m) {
 166     unsigned c;
 167     pa_assert(m);
 168
 169     m->channels = 0;
 170
 171     for (c = 0; c < PA_CHANNELS_MAX; c++)
 172         m->map[c] = PA_CHANNEL_POSITION_INVALID;
 173
 174     return m;
 175 }
 176
 177 pa_channel_map* pa_channel_map_init_mono(pa_channel_map *m) {
 178     pa_assert(m);
 179
 180     pa_channel_map_init(m);
 181
 182     m->channels = 1;
 183     m->map[0] = PA_CHANNEL_POSITION_MONO;
 184     return m;
 185 }
 186
 187 pa_channel_map* pa_channel_map_init_stereo(pa_channel_map *m) {
 188     pa_assert(m);
 189
 190     pa_channel_map_init(m);
 191
 192     m->channels = 2;
 193     m->map[0] = PA_CHANNEL_POSITION_LEFT;
 194     m->map[1] = PA_CHANNEL_POSITION_RIGHT;
 195     return m;
 196 }
 197
 198 pa_channel_map* pa_channel_map_init_auto(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def) {
 199     pa_assert(m);
 200     pa_assert(channels > 0);
 201     pa_assert(channels <= PA_CHANNELS_MAX);
 202
 203     pa_channel_map_init(m);
 204
 205     m->channels = channels;
 206
 207     switch (def) {
 208         case PA_CHANNEL_MAP_AIFF:
 209
 210             /* This is somewhat compatible with RFC3551 */
 211
 212             switch (channels) {
 213                 case 1:
 214                     m->map[0] = PA_CHANNEL_POSITION_MONO;
 215                     return m;
 216
 217                 case 6:
 218                     m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
 219                     m->map[1] = PA_CHANNEL_POSITION_SIDE_LEFT;
 220                     m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
 221                     m->map[3] = PA_CHANNEL_POSITION_FRONT_RIGHT;
 222                     m->map[4] = PA_CHANNEL_POSITION_SIDE_RIGHT;
 223                     m->map[5] = PA_CHANNEL_POSITION_LFE;
 224                     return m;
 225
 226                 case 5:
 227                     m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
 228                     m->map[3] = PA_CHANNEL_POSITION_REAR_LEFT;
 229                     m->map[4] = PA_CHANNEL_POSITION_REAR_RIGHT;
 230                     /* Fall through */
 231
 232                 case 2:
 233                     m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
 234                     m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
 235                     return m;
 236
 237                 case 3:
 238                     m->map[0] = PA_CHANNEL_POSITION_LEFT;
 239                     m->map[1] = PA_CHANNEL_POSITION_RIGHT;
 240                     m->map[2] = PA_CHANNEL_POSITION_CENTER;
 241                     return m;
 242
 243                 case 4:
 244                     m->map[0] = PA_CHANNEL_POSITION_LEFT;
 245                     m->map[1] = PA_CHANNEL_POSITION_CENTER;
 246                     m->map[2] = PA_CHANNEL_POSITION_RIGHT;
 247                     m->map[3] = PA_CHANNEL_POSITION_LFE;
 248                     return m;
 249
 250                 default:
 251                     return NULL;
 252             }
 253
 254         case PA_CHANNEL_MAP_ALSA:
 255
 256             switch (channels) {
 257                 case 1:
 258                     m->map[0] = PA_CHANNEL_POSITION_MONO;
 259                     return m;
 260
 261                 case 8:
 262                     m->map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
 263                     m->map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
 264                     /* Fall through */
 265
 266                 case 6:
 267                     m->map[5] = PA_CHANNEL_POSITION_LFE;
 268                     /* Fall through */
 269
 270                 case 5:
 271                     m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
 272                     /* Fall through */
 273
 274                 case 4:
 275                     m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
 276                     m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
 277                     /* Fall through */
 278
 279                 case 2:
 280                     m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
 281                     m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
 282                     return m;
 283
 284                 default:
 285                     return NULL;
 286             }
 287
 288         case PA_CHANNEL_MAP_AUX: {
 289             unsigned i;
 290
 291             if (channels >= PA_CHANNELS_MAX)
 292                 return NULL;
 293
 294             for (i = 0; i < channels; i++)
 295                 m->map[i] = PA_CHANNEL_POSITION_AUX0 + i;
 296
 297             return m;
 298         }
 299
 300         case PA_CHANNEL_MAP_WAVEEX:
 301
 302             switch (channels) {
 303                 case 1:
 304                     m->map[0] = PA_CHANNEL_POSITION_MONO;
 305                     return m;
 306
 307                 case 18:
 308                     m->map[15] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
 309                     m->map[16] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
 310                     m->map[17] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
 311                     /* Fall through */
 312
 313                 case 15:
 314                     m->map[12] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
 315                     m->map[13] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
 316                     m->map[14] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
 317                     /* Fall through */
 318
 319                 case 12:
 320                     m->map[11] = PA_CHANNEL_POSITION_TOP_CENTER;
 321                     /* Fall through */
 322
 323                 case 11:
 324                     m->map[9] = PA_CHANNEL_POSITION_SIDE_LEFT;
 325                     m->map[10] = PA_CHANNEL_POSITION_SIDE_RIGHT;
 326                     /* Fall through */
 327
 328                 case 9:
 329                     m->map[8] = PA_CHANNEL_POSITION_REAR_CENTER;
 330                     /* Fall through */
 331
 332                 case 8:
 333                     m->map[6] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
 334                     m->map[7] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
 335                     /* Fall through */
 336
 337                 case 6:
 338                     m->map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
 339                     m->map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
 340                     /* Fall through */
 341
 342                 case 4:
 343                     m->map[3] = PA_CHANNEL_POSITION_LFE;
 344                     /* Fall through */
 345
 346                 case 3:
 347                     m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
 348                     /* Fall through */
 349
 350                 case 2:
 351                     m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
 352                     m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
 353                     return m;
 354
 355                 default:
 356                     return NULL;
 357             }
 358
 359         case PA_CHANNEL_MAP_OSS:
 360
 361             switch (channels) {
 362                 case 1:
 363                     m->map[0] = PA_CHANNEL_POSITION_MONO;
 364                     return m;
 365
 366                 case 8:
 367                     m->map[6] = PA_CHANNEL_POSITION_REAR_LEFT;
 368                     m->map[7] = PA_CHANNEL_POSITION_REAR_RIGHT;
 369                     /* Fall through */
 370
 371                 case 6:
 372                     m->map[4] = PA_CHANNEL_POSITION_SIDE_LEFT;
 373                     m->map[5] = PA_CHANNEL_POSITION_SIDE_RIGHT;
 374                     /* Fall through */
 375
 376                 case 4:
 377                     m->map[3] = PA_CHANNEL_POSITION_LFE;
 378                     /* Fall through */
 379
 380                 case 3:
 381                     m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
 382                     /* Fall through */
 383
 384                 case 2:
 385                     m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
 386                     m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
 387                     return m;
 388
 389                 default:
 390                     return NULL;
 391             }
 392
 393
 394         default:
 395             return NULL;
 396     }
 397 }
 398
 399
 400 const char* pa_channel_position_to_string(pa_channel_position_t pos) {
 401
 402     if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
 403         return NULL;
 404
 405     return table[pos];
 406 }
 407
 408 const char* pa_channel_position_to_pretty_string(pa_channel_position_t pos) {
 409     if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
 410         return NULL;
 411
 412     return pretty_table[pos];
 413 }
 414
 415 int pa_channel_map_equal(const pa_channel_map *a, const pa_channel_map *b) {
 416     unsigned c;
 417
 418     pa_assert(a);
 419     pa_assert(b);
 420
 421     if (a->channels != b->channels)
 422         return 0;
 423
 424     for (c = 0; c < a->channels; c++)
 425         if (a->map[c] != b->map[c])
 426             return 0;
 427
 428     return 1;
 429 }
 430
 431 char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
 432     unsigned channel;
 433     int first = 1;
 434     char *e;
 435
 436     pa_assert(s);
 437     pa_assert(l > 0);
 438     pa_assert(map);
 439
 440     *(e = s) = 0;
 441
 442     for (channel = 0; channel < map->channels && l > 1; channel++) {
 443         l -= pa_snprintf(e, l, "%s%s",
 444                       first ? "" : ",",
 445                       pa_channel_position_to_string(map->map[channel]));
 446
 447         e = strchr(e, 0);
 448         first = 0;
 449     }
 450
 451     return s;
 452 }
 453
 454 pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
 455     const char *state;
 456     pa_channel_map map;
 457     char *p;
 458
 459     pa_assert(rmap);
 460     pa_assert(s);
 461
 462     memset(&map, 0, sizeof(map));
 463
 464     if (strcmp(s, "stereo") == 0) {
 465         map.channels = 2;
 466         map.map[0] = PA_CHANNEL_POSITION_LEFT;
 467         map.map[1] = PA_CHANNEL_POSITION_RIGHT;
 468         goto finish;
 469     }
 470
 471     state = NULL;
 472     map.channels = 0;
 473
 474     while ((p = pa_split(s, ",", &state))) {
 475
 476         if (map.channels >= PA_CHANNELS_MAX) {
 477             pa_xfree(p);
 478             return NULL;
 479         }
 480
 481         /* Some special aliases */
 482         if (strcmp(p, "left") == 0)
 483             map.map[map.channels++] = PA_CHANNEL_POSITION_LEFT;
 484         else if (strcmp(p, "right") == 0)
 485             map.map[map.channels++] = PA_CHANNEL_POSITION_RIGHT;
 486         else if (strcmp(p, "center") == 0)
 487             map.map[map.channels++] = PA_CHANNEL_POSITION_CENTER;
 488         else if (strcmp(p, "subwoofer") == 0)
 489             map.map[map.channels++] = PA_CHANNEL_POSITION_SUBWOOFER;
 490         else {
 491             pa_channel_position_t i;
 492
 493             for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
 494                 if (strcmp(p, table[i]) == 0) {
 495                     map.map[map.channels++] = i;
 496                     break;
 497                 }
 498
 499             if (i >= PA_CHANNEL_POSITION_MAX) {
 500                 pa_xfree(p);
 501                 return NULL;
 502             }
 503         }
 504
 505         pa_xfree(p);
 506     }
 507
 508 finish:
 509
 510     if (!pa_channel_map_valid(&map))
 511         return NULL;
 512
 513     *rmap = map;
 514     return rmap;
 515 }
 516
 517 int pa_channel_map_valid(const pa_channel_map *map) {
 518     unsigned c;
 519
 520     pa_assert(map);
 521
 522     if (map->channels <= 0 || map->channels > PA_CHANNELS_MAX)
 523         return 0;
 524
 525     for (c = 0; c < map->channels; c++) {
 526
 527         if (map->map[c] < 0 ||map->map[c] >= PA_CHANNEL_POSITION_MAX)
 528             return 0;
 529
 530     }
 531
 532     return 1;
 533 }
 534