code.delx.au - pulseaudio/blob - src/pulsecore/tagstruct.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as
  10   published by the Free Software Foundation; either version 2.1 of the
  11   License, or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public
  19   License along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/time.h>
  32 #include <stdarg.h>
  33
  34 #ifdef HAVE_NETINET_IN_H
  35 #include <netinet/in.h>
  36 #endif
  37
  38 #include <pulse/xmalloc.h>
  39
  40 #include <pulsecore/winsock.h>
  41 #include <pulsecore/macro.h>
  42
  43 #include "tagstruct.h"
  44
  45 struct pa_tagstruct {
  46     uint8_t *data;
  47     size_t length, allocated;
  48     size_t rindex;
  49
  50     int dynamic;
  51 };
  52
  53 pa_tagstruct *pa_tagstruct_new(const uint8_t* data, size_t length) {
  54     pa_tagstruct*t;
  55
  56     pa_assert(!data || (data && length));
  57
  58     t = pa_xnew(pa_tagstruct, 1);
  59     t->data = (uint8_t*) data;
  60     t->allocated = t->length = data ? length : 0;
  61     t->rindex = 0;
  62     t->dynamic = !data;
  63
  64     return t;
  65 }
  66
  67 void pa_tagstruct_free(pa_tagstruct*t) {
  68     pa_assert(t);
  69
  70     if (t->dynamic)
  71         pa_xfree(t->data);
  72     pa_xfree(t);
  73 }
  74
  75 uint8_t* pa_tagstruct_free_data(pa_tagstruct*t, size_t *l) {
  76     uint8_t *p;
  77
  78     pa_assert(t);
  79     pa_assert(t->dynamic);
  80     pa_assert(l);
  81
  82     p = t->data;
  83     *l = t->length;
  84     pa_xfree(t);
  85     return p;
  86 }
  87
  88 static void extend(pa_tagstruct*t, size_t l) {
  89     pa_assert(t);
  90     pa_assert(t->dynamic);
  91
  92     if (t->length+l <= t->allocated)
  93         return;
  94
  95     t->data = pa_xrealloc(t->data, t->allocated = t->length+l+100);
  96 }
  97
  98 void pa_tagstruct_puts(pa_tagstruct*t, const char *s) {
  99     size_t l;
 100     pa_assert(t);
 101
 102     if (s) {
 103         l = strlen(s)+2;
 104         extend(t, l);
 105         t->data[t->length] = PA_TAG_STRING;
 106         strcpy((char*) (t->data+t->length+1), s);
 107         t->length += l;
 108     } else {
 109         extend(t, 1);
 110         t->data[t->length] = PA_TAG_STRING_NULL;
 111         t->length += 1;
 112     }
 113 }
 114
 115 void pa_tagstruct_putu32(pa_tagstruct*t, uint32_t i) {
 116     pa_assert(t);
 117
 118     extend(t, 5);
 119     t->data[t->length] = PA_TAG_U32;
 120     i = htonl(i);
 121     memcpy(t->data+t->length+1, &i, 4);
 122     t->length += 5;
 123 }
 124
 125 void pa_tagstruct_putu8(pa_tagstruct*t, uint8_t c) {
 126     pa_assert(t);
 127
 128     extend(t, 2);
 129     t->data[t->length] = PA_TAG_U8;
 130     *(t->data+t->length+1) = c;
 131     t->length += 2;
 132 }
 133
 134 void pa_tagstruct_put_sample_spec(pa_tagstruct *t, const pa_sample_spec *ss) {
 135     uint32_t rate;
 136
 137     pa_assert(t);
 138     pa_assert(ss);
 139
 140     extend(t, 7);
 141     t->data[t->length] = PA_TAG_SAMPLE_SPEC;
 142     t->data[t->length+1] = (uint8_t) ss->format;
 143     t->data[t->length+2] = ss->channels;
 144     rate = htonl(ss->rate);
 145     memcpy(t->data+t->length+3, &rate, 4);
 146     t->length += 7;
 147 }
 148
 149 void pa_tagstruct_put_arbitrary(pa_tagstruct *t, const void *p, size_t length) {
 150     uint32_t tmp;
 151
 152     pa_assert(t);
 153     pa_assert(p);
 154
 155     extend(t, 5+length);
 156     t->data[t->length] = PA_TAG_ARBITRARY;
 157     tmp = htonl(length);
 158     memcpy(t->data+t->length+1, &tmp, 4);
 159     if (length)
 160         memcpy(t->data+t->length+5, p, length);
 161     t->length += 5+length;
 162 }
 163
 164 void pa_tagstruct_put_boolean(pa_tagstruct*t, int b) {
 165     pa_assert(t);
 166
 167     extend(t, 1);
 168     t->data[t->length] = b ? PA_TAG_BOOLEAN_TRUE : PA_TAG_BOOLEAN_FALSE;
 169     t->length += 1;
 170 }
 171
 172 void pa_tagstruct_put_timeval(pa_tagstruct*t, const struct timeval *tv) {
 173     uint32_t tmp;
 174     pa_assert(t);
 175
 176     extend(t, 9);
 177     t->data[t->length] = PA_TAG_TIMEVAL;
 178     tmp = htonl(tv->tv_sec);
 179     memcpy(t->data+t->length+1, &tmp, 4);
 180     tmp = htonl(tv->tv_usec);
 181     memcpy(t->data+t->length+5, &tmp, 4);
 182     t->length += 9;
 183 }
 184
 185 void pa_tagstruct_put_usec(pa_tagstruct*t, pa_usec_t u) {
 186     uint32_t tmp;
 187
 188     pa_assert(t);
 189
 190     extend(t, 9);
 191     t->data[t->length] = PA_TAG_USEC;
 192     tmp = htonl((uint32_t) (u >> 32));
 193     memcpy(t->data+t->length+1, &tmp, 4);
 194     tmp = htonl((uint32_t) u);
 195     memcpy(t->data+t->length+5, &tmp, 4);
 196     t->length += 9;
 197 }
 198
 199 void pa_tagstruct_putu64(pa_tagstruct*t, uint64_t u) {
 200     uint32_t tmp;
 201
 202     pa_assert(t);
 203
 204     extend(t, 9);
 205     t->data[t->length] = PA_TAG_U64;
 206     tmp = htonl((uint32_t) (u >> 32));
 207     memcpy(t->data+t->length+1, &tmp, 4);
 208     tmp = htonl((uint32_t) u);
 209     memcpy(t->data+t->length+5, &tmp, 4);
 210     t->length += 9;
 211 }
 212
 213 void pa_tagstruct_puts64(pa_tagstruct*t, int64_t u) {
 214     uint32_t tmp;
 215
 216     pa_assert(t);
 217
 218     extend(t, 9);
 219     t->data[t->length] = PA_TAG_S64;
 220     tmp = htonl((uint32_t) ((uint64_t) u >> 32));
 221     memcpy(t->data+t->length+1, &tmp, 4);
 222     tmp = htonl((uint32_t) ((uint64_t) u));
 223     memcpy(t->data+t->length+5, &tmp, 4);
 224     t->length += 9;
 225 }
 226
 227 void pa_tagstruct_put_channel_map(pa_tagstruct *t, const pa_channel_map *map) {
 228     unsigned i;
 229
 230     pa_assert(t);
 231     extend(t, 2 + map->channels);
 232
 233     t->data[t->length++] = PA_TAG_CHANNEL_MAP;
 234     t->data[t->length++] = map->channels;
 235
 236     for (i = 0; i < map->channels; i ++)
 237         t->data[t->length++] = (uint8_t) map->map[i];
 238 }
 239
 240 void pa_tagstruct_put_cvolume(pa_tagstruct *t, const pa_cvolume *cvolume) {
 241     unsigned i;
 242     pa_volume_t vol;
 243
 244     pa_assert(t);
 245     extend(t, 2 + cvolume->channels * sizeof(pa_volume_t));
 246
 247     t->data[t->length++] = PA_TAG_CVOLUME;
 248     t->data[t->length++] = cvolume->channels;
 249
 250     for (i = 0; i < cvolume->channels; i ++) {
 251         vol = htonl(cvolume->values[i]);
 252         memcpy(t->data + t->length, &vol, sizeof(pa_volume_t));
 253         t->length += sizeof(pa_volume_t);
 254     }
 255 }
 256
 257 int pa_tagstruct_gets(pa_tagstruct*t, const char **s) {
 258     int error = 0;
 259     size_t n;
 260     char *c;
 261
 262     pa_assert(t);
 263     pa_assert(s);
 264
 265     if (t->rindex+1 > t->length)
 266         return -1;
 267
 268     if (t->data[t->rindex] == PA_TAG_STRING_NULL) {
 269         t->rindex++;
 270         *s = NULL;
 271         return 0;
 272     }
 273
 274     if (t->rindex+2 > t->length)
 275         return -1;
 276
 277     if (t->data[t->rindex] != PA_TAG_STRING)
 278         return -1;
 279
 280     error = 1;
 281     for (n = 0, c = (char*) (t->data+t->rindex+1); t->rindex+1+n < t->length; n++, c++)
 282         if (!*c) {
 283             error = 0;
 284             break;
 285         }
 286
 287     if (error)
 288         return -1;
 289
 290     *s = (char*) (t->data+t->rindex+1);
 291
 292     t->rindex += n+2;
 293     return 0;
 294 }
 295
 296 int pa_tagstruct_getu32(pa_tagstruct*t, uint32_t *i) {
 297     pa_assert(t);
 298     pa_assert(i);
 299
 300     if (t->rindex+5 > t->length)
 301         return -1;
 302
 303     if (t->data[t->rindex] != PA_TAG_U32)
 304         return -1;
 305
 306     memcpy(i, t->data+t->rindex+1, 4);
 307     *i = ntohl(*i);
 308     t->rindex += 5;
 309     return 0;
 310 }
 311
 312 int pa_tagstruct_getu8(pa_tagstruct*t, uint8_t *c) {
 313     pa_assert(t);
 314     pa_assert(c);
 315
 316     if (t->rindex+2 > t->length)
 317         return -1;
 318
 319     if (t->data[t->rindex] != PA_TAG_U8)
 320         return -1;
 321
 322     *c = t->data[t->rindex+1];
 323     t->rindex +=2;
 324     return 0;
 325 }
 326
 327 int pa_tagstruct_get_sample_spec(pa_tagstruct *t, pa_sample_spec *ss) {
 328     pa_assert(t);
 329     pa_assert(ss);
 330
 331     if (t->rindex+7 > t->length)
 332         return -1;
 333
 334     if (t->data[t->rindex] != PA_TAG_SAMPLE_SPEC)
 335         return -1;
 336
 337     ss->format = t->data[t->rindex+1];
 338     ss->channels = t->data[t->rindex+2];
 339     memcpy(&ss->rate, t->data+t->rindex+3, 4);
 340     ss->rate = ntohl(ss->rate);
 341
 342     t->rindex += 7;
 343     return 0;
 344 }
 345
 346 int pa_tagstruct_get_arbitrary(pa_tagstruct *t, const void **p, size_t length) {
 347     uint32_t len;
 348
 349     pa_assert(t);
 350     pa_assert(p);
 351
 352     if (t->rindex+5+length > t->length)
 353         return -1;
 354
 355     if (t->data[t->rindex] != PA_TAG_ARBITRARY)
 356         return -1;
 357
 358     memcpy(&len, t->data+t->rindex+1, 4);
 359     if (ntohl(len) != length)
 360         return -1;
 361
 362     *p = t->data+t->rindex+5;
 363     t->rindex += 5+length;
 364     return 0;
 365 }
 366
 367 int pa_tagstruct_eof(pa_tagstruct*t) {
 368     pa_assert(t);
 369
 370     return t->rindex >= t->length;
 371 }
 372
 373 const uint8_t* pa_tagstruct_data(pa_tagstruct*t, size_t *l) {
 374     pa_assert(t);
 375     pa_assert(t->dynamic);
 376     pa_assert(l);
 377
 378     *l = t->length;
 379     return t->data;
 380 }
 381
 382 int pa_tagstruct_get_boolean(pa_tagstruct*t, int *b) {
 383     pa_assert(t);
 384     pa_assert(b);
 385
 386     if (t->rindex+1 > t->length)
 387         return -1;
 388
 389     if (t->data[t->rindex] == PA_TAG_BOOLEAN_TRUE)
 390         *b = 1;
 391     else if (t->data[t->rindex] == PA_TAG_BOOLEAN_FALSE)
 392         *b = 0;
 393     else
 394         return -1;
 395
 396     t->rindex +=1;
 397     return 0;
 398 }
 399
 400 int pa_tagstruct_get_timeval(pa_tagstruct*t, struct timeval *tv) {
 401
 402     pa_assert(t);
 403     pa_assert(tv);
 404
 405     if (t->rindex+9 > t->length)
 406         return -1;
 407
 408     if (t->data[t->rindex] != PA_TAG_TIMEVAL)
 409         return -1;
 410
 411     memcpy(&tv->tv_sec, t->data+t->rindex+1, 4);
 412     tv->tv_sec = ntohl(tv->tv_sec);
 413     memcpy(&tv->tv_usec, t->data+t->rindex+5, 4);
 414     tv->tv_usec = ntohl(tv->tv_usec);
 415     t->rindex += 9;
 416     return 0;
 417 }
 418
 419 int pa_tagstruct_get_usec(pa_tagstruct*t, pa_usec_t *u) {
 420     uint32_t tmp;
 421
 422     pa_assert(t);
 423     pa_assert(u);
 424
 425     if (t->rindex+9 > t->length)
 426         return -1;
 427
 428     if (t->data[t->rindex] != PA_TAG_USEC)
 429         return -1;
 430
 431     memcpy(&tmp, t->data+t->rindex+1, 4);
 432     *u = (pa_usec_t) ntohl(tmp) << 32;
 433     memcpy(&tmp, t->data+t->rindex+5, 4);
 434     *u |= (pa_usec_t) ntohl(tmp);
 435     t->rindex +=9;
 436     return 0;
 437 }
 438
 439 int pa_tagstruct_getu64(pa_tagstruct*t, uint64_t *u) {
 440     uint32_t tmp;
 441
 442     pa_assert(t);
 443     pa_assert(u);
 444
 445     if (t->rindex+9 > t->length)
 446         return -1;
 447
 448     if (t->data[t->rindex] != PA_TAG_U64)
 449         return -1;
 450
 451     memcpy(&tmp, t->data+t->rindex+1, 4);
 452     *u = (uint64_t) ntohl(tmp) << 32;
 453     memcpy(&tmp, t->data+t->rindex+5, 4);
 454     *u |= (uint64_t) ntohl(tmp);
 455     t->rindex +=9;
 456     return 0;
 457 }
 458
 459 int pa_tagstruct_gets64(pa_tagstruct*t, int64_t *u) {
 460     uint32_t tmp;
 461
 462     pa_assert(t);
 463     pa_assert(u);
 464
 465     if (t->rindex+9 > t->length)
 466         return -1;
 467
 468     if (t->data[t->rindex] != PA_TAG_S64)
 469         return -1;
 470
 471     memcpy(&tmp, t->data+t->rindex+1, 4);
 472     *u = (int64_t) ((uint64_t) ntohl(tmp) << 32);
 473     memcpy(&tmp, t->data+t->rindex+5, 4);
 474     *u |= (int64_t) ntohl(tmp);
 475     t->rindex +=9;
 476     return 0;
 477 }
 478
 479 int pa_tagstruct_get_channel_map(pa_tagstruct *t, pa_channel_map *map) {
 480     unsigned i;
 481
 482     pa_assert(t);
 483     pa_assert(map);
 484
 485     if (t->rindex+2 > t->length)
 486         return -1;
 487
 488     if (t->data[t->rindex] != PA_TAG_CHANNEL_MAP)
 489         return -1;
 490
 491     if ((map->channels = t->data[t->rindex+1]) > PA_CHANNELS_MAX)
 492         return -1;
 493
 494     if (t->rindex+2+map->channels > t->length)
 495         return -1;
 496
 497     for (i = 0; i < map->channels; i ++)
 498         map->map[i] = (int8_t) t->data[t->rindex + 2 + i];
 499
 500     t->rindex += 2 + map->channels;
 501     return 0;
 502 }
 503
 504 int pa_tagstruct_get_cvolume(pa_tagstruct *t, pa_cvolume *cvolume) {
 505     unsigned i;
 506     pa_volume_t vol;
 507
 508     pa_assert(t);
 509     pa_assert(cvolume);
 510
 511     if (t->rindex+2 > t->length)
 512         return -1;
 513
 514     if (t->data[t->rindex] != PA_TAG_CVOLUME)
 515         return -1;
 516
 517     if ((cvolume->channels = t->data[t->rindex+1]) > PA_CHANNELS_MAX)
 518         return -1;
 519
 520     if (t->rindex+2+cvolume->channels*sizeof(pa_volume_t) > t->length)
 521         return -1;
 522
 523     for (i = 0; i < cvolume->channels; i ++) {
 524         memcpy(&vol, t->data + t->rindex + 2 + i * sizeof(pa_volume_t), sizeof(pa_volume_t));
 525         cvolume->values[i] = (pa_volume_t) ntohl(vol);
 526     }
 527
 528     t->rindex += 2 + cvolume->channels * sizeof(pa_volume_t);
 529     return 0;
 530 }
 531
 532 void pa_tagstruct_put(pa_tagstruct *t, ...) {
 533     va_list va;
 534     pa_assert(t);
 535
 536     va_start(va, t);
 537
 538     for (;;) {
 539         int tag = va_arg(va, int);
 540
 541         if (tag == PA_TAG_INVALID)
 542             break;
 543
 544         switch (tag) {
 545             case PA_TAG_STRING:
 546             case PA_TAG_STRING_NULL:
 547                 pa_tagstruct_puts(t, va_arg(va, char*));
 548                 break;
 549
 550             case PA_TAG_U32:
 551                 pa_tagstruct_putu32(t, va_arg(va, uint32_t));
 552                 break;
 553
 554             case PA_TAG_U8:
 555                 pa_tagstruct_putu8(t, (uint8_t) va_arg(va, int));
 556                 break;
 557
 558             case PA_TAG_U64:
 559                 pa_tagstruct_putu64(t, va_arg(va, uint64_t));
 560                 break;
 561
 562             case PA_TAG_SAMPLE_SPEC:
 563                 pa_tagstruct_put_sample_spec(t, va_arg(va, pa_sample_spec*));
 564                 break;
 565
 566             case PA_TAG_ARBITRARY: {
 567                 void *p = va_arg(va, void*);
 568                 size_t size = va_arg(va, size_t);
 569                 pa_tagstruct_put_arbitrary(t, p, size);
 570                 break;
 571             }
 572
 573             case PA_TAG_BOOLEAN_TRUE:
 574             case PA_TAG_BOOLEAN_FALSE:
 575                 pa_tagstruct_put_boolean(t, va_arg(va, int));
 576                 break;
 577
 578             case PA_TAG_TIMEVAL:
 579                 pa_tagstruct_put_timeval(t, va_arg(va, struct timeval*));
 580                 break;
 581
 582             case PA_TAG_USEC:
 583                 pa_tagstruct_put_usec(t, va_arg(va, pa_usec_t));
 584                 break;
 585
 586             case PA_TAG_CHANNEL_MAP:
 587                 pa_tagstruct_put_channel_map(t, va_arg(va, pa_channel_map *));
 588                 break;
 589
 590             case PA_TAG_CVOLUME:
 591                 pa_tagstruct_put_cvolume(t, va_arg(va, pa_cvolume *));
 592                 break;
 593
 594             default:
 595                 pa_assert_not_reached();
 596         }
 597     }
 598
 599     va_end(va);
 600 }
 601
 602 int pa_tagstruct_get(pa_tagstruct *t, ...) {
 603     va_list va;
 604     int ret = 0;
 605
 606     pa_assert(t);
 607
 608     va_start(va, t);
 609     while (ret == 0) {
 610         int tag = va_arg(va, int);
 611
 612         if (tag == PA_TAG_INVALID)
 613             break;
 614
 615         switch (tag) {
 616             case PA_TAG_STRING:
 617             case PA_TAG_STRING_NULL:
 618                 ret = pa_tagstruct_gets(t, va_arg(va, const char**));
 619                 break;
 620
 621             case PA_TAG_U32:
 622                 ret = pa_tagstruct_getu32(t, va_arg(va, uint32_t*));
 623                 break;
 624
 625             case PA_TAG_U8:
 626                 ret = pa_tagstruct_getu8(t, va_arg(va, uint8_t*));
 627                 break;
 628
 629             case PA_TAG_U64:
 630                 ret = pa_tagstruct_getu64(t, va_arg(va, uint64_t*));
 631                 break;
 632
 633             case PA_TAG_SAMPLE_SPEC:
 634                 ret = pa_tagstruct_get_sample_spec(t, va_arg(va, pa_sample_spec*));
 635                 break;
 636
 637             case PA_TAG_ARBITRARY: {
 638                 const void **p = va_arg(va, const void**);
 639                 size_t size = va_arg(va, size_t);
 640                 ret = pa_tagstruct_get_arbitrary(t, p, size);
 641                 break;
 642             }
 643
 644             case PA_TAG_BOOLEAN_TRUE:
 645             case PA_TAG_BOOLEAN_FALSE:
 646                 ret = pa_tagstruct_get_boolean(t, va_arg(va, int*));
 647                 break;
 648
 649             case PA_TAG_TIMEVAL:
 650                 ret = pa_tagstruct_get_timeval(t, va_arg(va, struct timeval*));
 651                 break;
 652
 653             case PA_TAG_USEC:
 654                 ret = pa_tagstruct_get_usec(t, va_arg(va, pa_usec_t*));
 655                 break;
 656
 657             case PA_TAG_CHANNEL_MAP:
 658                 ret = pa_tagstruct_get_channel_map(t, va_arg(va, pa_channel_map *));
 659                 break;
 660
 661             case PA_TAG_CVOLUME:
 662                 ret = pa_tagstruct_get_cvolume(t, va_arg(va, pa_cvolume *));
 663                 break;
 664
 665             default:
 666                 pa_assert_not_reached();
 667         }
 668
 669     }
 670
 671     va_end(va);
 672     return ret;
 673 }