port.cpp

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** PBX4Linux                                                                 **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** port                                                                      **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 /* HOW TO audio?
  13
  14 Audio flow has two ways:
  15
  16 * from channel to the upper layer
  17   -> sound from mISDN channel
  18   -> announcement from vbox channel
  19
  20 * from the upper layer to the channel
  21   -> sound from remote channel
  22
  23 Audio is required:
  24
  25   -> if local or remote channel is not mISDN
  26   -> if call is recorded (vbox)
  27
  28
  29 Functions:
  30
  31 * PmISDN::txfromup
  32   -> audio from upper layer is buffered for later transmission to channel
  33 * PmISDN::handler
  34   -> buffered audio from upper layer or tones are transmitted via system clock
  35 * mISDN_handler
  36   -> rx-data from port to record() and upper layer
  37   -> tx-data from port (dsp) to record()
  38 * VboxPort::handler
  39   -> streaming announcement to upper layer
  40   -> recording announcement
  41 * VboxPort::message_epoint
  42   -> recording audio message from upper layer
  43
  44
  45
  46 */
  47
  48 #include "main.h"
  49
  50 /* enable to test conference mixing, even if only two members are bridged */
  51 //#define TEST_CONFERENCE 1
  52
  53 #define SHORT_MIN -32768
  54 #define SHORT_MAX 32767
  55
  56 class Port *port_first = NULL;
  57
  58 unsigned int port_serial = 1; /* must be 1, because 0== no port */
  59
  60 struct port_bridge *p_bridge_first;
  61
  62 static void remove_bridge(struct port_bridge *bridge, class Port *port);
  63
  64 /* free epointlist relation
  65  */
  66 void Port::free_epointlist(struct epoint_list *epointlist)
  67 {
  68         struct epoint_list *temp, **tempp;
  69
  70         temp = p_epointlist;
  71         tempp = &p_epointlist;
  72         while(temp) {
  73                 if (temp == epointlist)
  74                         break;
  75
  76                 tempp = &temp->next;
  77                 temp = temp->next;
  78         }
  79         if (temp == 0) {
  80                 PERROR("SOFTWARE ERROR: epointlist not in port's list.\n");
  81                 return;
  82         }
  83         /* detach */
  84         *tempp=temp->next;
  85
  86         /* free */
  87         PDEBUG(DEBUG_EPOINT, "PORT(%d) removed epoint from port\n", p_serial);
  88         FREE(temp, sizeof(struct epoint_list));
  89         ememuse--;
  90 }
  91
  92
  93 void Port::free_epointid(unsigned int epoint_id)
  94 {
  95         struct epoint_list *temp, **tempp;
  96
  97         temp = p_epointlist;
  98         tempp = &p_epointlist;
  99         while(temp) {
 100                 if (temp->epoint_id == epoint_id)
 101                         break;
 102
 103                 tempp = &temp->next;
 104                 temp = temp->next;
 105         }
 106         if (temp == 0) {
 107                 PERROR("epoint_id not in port's list.\n");
 108                 return;
 109         }
 110         /* detach */
 111         *tempp=temp->next;
 112
 113         /* free */
 114         PDEBUG(DEBUG_EPOINT, "PORT(%d) removed epoint from port\n", p_serial);
 115         FREE(temp, sizeof(struct epoint_list));
 116         ememuse--;
 117 }
 118
 119
 120 /* create new epointlist relation
 121  */
 122 struct epoint_list *Port::epointlist_new(unsigned int epoint_id)
 123 {
 124         struct epoint_list *epointlist, **epointlistpointer;
 125
 126         /* epointlist structure */
 127         epointlist = (struct epoint_list *)MALLOC(sizeof(struct epoint_list));
 128         if (!epointlist)
 129                 FATAL("No memory for epointlist\n");
 130         ememuse++;
 131         PDEBUG(DEBUG_EPOINT, "PORT(%d) allocating epoint_list.\n", p_serial);
 132
 133         /* add epoint_list to chain */
 134         epointlist->next = NULL;
 135         epointlistpointer = &p_epointlist;
 136         while(*epointlistpointer)
 137                 epointlistpointer = &((*epointlistpointer)->next);
 138         *epointlistpointer = epointlist;
 139
 140         /* link to epoint */
 141         epointlist->epoint_id = epoint_id;
 142         epointlist->active = 1;
 143
 144         return(epointlist);
 145 }
 146
 147
 148 /*
 149  * port constructor
 150  */
 151 Port::Port(int type, const char *portname, struct port_settings *settings)
 152 {
 153         class Port *temp, **tempp;
 154
 155         /* initialize object */
 156         if (settings)
 157                 memcpy(&p_settings, settings, sizeof(struct port_settings));
 158         else {
 159                 memset(&p_settings, 0, sizeof(p_settings));
 160         }
 161         SCPY(p_name, portname);
 162         p_tone_dir[0] = '\0';
 163         p_type = type;
 164         p_serial = port_serial++;
 165         p_tone_fh = -1;
 166         p_tone_fetched = NULL;
 167         p_tone_name[0] = '\0';
 168         p_state = PORT_STATE_IDLE;
 169         p_epointlist = NULL;
 170         memset(&p_callerinfo, 0, sizeof(p_callerinfo));
 171         memset(&p_dialinginfo, 0, sizeof(p_dialinginfo));
 172         memset(&p_connectinfo, 0, sizeof(p_connectinfo));
 173         memset(&p_redirinfo, 0, sizeof(p_redirinfo));
 174         memset(&p_capainfo, 0, sizeof(p_capainfo));
 175         p_echotest = 0;
 176         p_bridge = 0;
 177
 178         /* call recording */
 179         p_record = NULL;
 180         p_record_type = 0;
 181         p_record_length = 0;
 182         p_record_skip = 0;
 183         p_record_filename[0] = '\0';
 184         p_record_buffer_readp = 0;
 185         p_record_buffer_writep = 0;
 186         p_record_buffer_dir = 0;
 187
 188         /* append port to chain */
 189         next = NULL;
 190         temp = port_first;
 191         tempp = &port_first;
 192         while(temp) {
 193                 tempp = &temp->next;
 194                 temp = temp->next;
 195         }
 196         *tempp = this;
 197
 198         classuse++;
 199
 200         PDEBUG(DEBUG_PORT, "new port (%d) of type 0x%x, name '%s'\n", p_serial, type, portname);
 201 }
 202
 203
 204 /*
 205  * port destructor
 206  */
 207 Port::~Port(void)
 208 {
 209         class Port *temp, **tempp;
 210         struct lcr_msg *message;
 211
 212         PDEBUG(DEBUG_PORT, "removing port (%d) of type 0x%x, name '%s'\n", p_serial, p_type, p_name);
 213
 214         if (p_bridge) {
 215                 PDEBUG(DEBUG_PORT, "Removing us from bridge %u\n", p_bridge->bridge_id);
 216                 remove_bridge(p_bridge, this);
 217         }
 218
 219         if (p_record)
 220                 close_record(0, 0);
 221
 222         classuse--;
 223
 224         /* disconnect port from endpoint */
 225         while(p_epointlist) {
 226                 /* send disconnect */
 227                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 228                 message->param.disconnectinfo.cause = 16;
 229                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 230                 message_put(message);
 231                 /* remove endpoint */
 232                 free_epointlist(p_epointlist);
 233         }
 234
 235         /* remove port from chain */
 236         temp=port_first;
 237         tempp=&port_first;
 238         while(temp) {
 239                 if (temp == this)
 240                         break;
 241                 tempp = &temp->next;
 242                 temp = temp->next;
 243         }
 244         if (temp == NULL)
 245                 FATAL("PORT(%s) port not in port's list.\n", p_name);
 246         /* detach */
 247         *tempp=this->next;
 248
 249         /* close open tones file */
 250         if (p_tone_fh >= 0) {
 251                 close(p_tone_fh);
 252                 p_tone_fh = -1;
 253                 fhuse--;
 254         }
 255         p_tone_fetched = NULL;
 256 }
 257
 258 PORT_STATE_NAMES
 259
 260 /* set new endpoint state
 261  */
 262 void Port::new_state(int state)
 263 {
 264         PDEBUG(DEBUG_PORT, "PORT(%s) new state %s --> %s\n", p_name, state_name[p_state], state_name[state]);
 265         p_state = state;
 266 }
 267
 268
 269 /*
 270  * find the port with port_id
 271  */
 272 class Port *find_port_id(unsigned int port_id)
 273 {
 274         class Port *port = port_first;
 275
 276         while(port) {
 277 //printf("comparing: '%s' with '%s'\n", name, port->name);
 278                 if (port->p_serial == port_id)
 279                         return(port);
 280                 port = port->next;
 281         }
 282
 283         return(NULL);
 284 }
 285
 286
 287 /*
 288  * set echotest
 289  */
 290 void Port::set_echotest(int echotest)
 291 {
 292         p_echotest = echotest;
 293 }
 294
 295
 296 /*
 297  * set the file in the tone directory with the given name
 298  */
 299 void Port::set_tone(const char *dir, const char *name)
 300 {
 301         int fh;
 302         char filename[128];
 303
 304         if (name == NULL)
 305                 name = "";
 306
 307         if (!dir || !dir[0])
 308                 dir = options.tones_dir; /* just in case we have no PmISDN instance */
 309
 310         /* no counter, no eof, normal speed */
 311         p_tone_counter = 0;
 312         p_tone_eof = 0;
 313         p_tone_speed = 1;
 314         p_tone_codec = CODEC_LAW;
 315
 316         if (p_tone_fh >= 0) {
 317                 close(p_tone_fh);
 318                 p_tone_fh = -1;
 319                 fhuse--;
 320         }
 321         p_tone_fetched = NULL;
 322
 323         if (name[0]) {
 324                 if (name[0] == '/') {
 325                         SPRINT(p_tone_name, "%s", name);
 326                         p_tone_dir[0] = '\0';
 327                 } else {
 328                         SCPY(p_tone_dir, dir);
 329                         SCPY(p_tone_name, name);
 330                 }
 331                 /* trigger playback */
 332                 update_load();
 333         } else {
 334                 p_tone_name[0]= '\0';
 335                 p_tone_dir[0]= '\0';
 336                 return;
 337         }
 338
 339         if (!!strncmp(name,"cause_",6))
 340                 return;
 341
 342         /* now we check if the cause exists, otherwhise we use error tone. */
 343         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, 0, 0))) {
 344                 p_tone_fetched = NULL;
 345                 return;
 346         }
 347         SPRINT(filename, "%s_loop", p_tone_name);
 348         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, 0, 0))) {
 349                 p_tone_fetched = NULL;
 350                 return;
 351         }
 352         SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 353         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 354                 close(fh);
 355                 return;
 356         }
 357         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 358         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 359                 close(fh);
 360                 return;
 361         }
 362
 363         if (!strcmp(name,"cause_00") || !strcmp(name,"cause_10")) {
 364                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using release tone\n", p_name, name+6);
 365                 SPRINT(p_tone_name,"release");
 366         } else
 367         if (!strcmp(name,"cause_11")) {
 368                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using busy tone\n", p_name, name+6);
 369                 SPRINT(p_tone_name,"busy");
 370         } else {
 371                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using error tone\n", p_name, name+6);
 372                 SPRINT(p_tone_name,"error");
 373         }
 374 }
 375
 376
 377 /*
 378  * set the file in the tone directory for vbox playback
 379  * also set the play_eof-flag
 380  */
 381 void Port::set_vbox_tone(const char *dir, const char *name)
 382 {
 383         char filename[256];
 384
 385         p_tone_speed = 1;
 386         p_tone_counter = 0;
 387         p_tone_codec = CODEC_LAW;
 388         p_tone_eof = 1;
 389
 390         if (p_tone_fh >= 0) {
 391                 close(p_tone_fh);
 392                 p_tone_fh = -1;
 393                 fhuse--;
 394         }
 395         p_tone_fetched = NULL;
 396
 397         SPRINT(p_tone_dir,  dir);
 398         SPRINT(p_tone_name,  name);
 399         /* trigger playback */
 400         update_load();
 401
 402         /* now we check if the cause exists, otherwhise we use error tone. */
 403         if (p_tone_dir[0]) {
 404                 if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 405                         PDEBUG(DEBUG_PORT, "PORT(%s) opening fetched tone: %s\n", p_name, p_tone_name);
 406                         return;
 407                 }
 408                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 409                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 410                         fhuse++;
 411                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 412                         return;
 413                 }
 414         } else {
 415                 SPRINT(filename, "%s", p_tone_name);
 416                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 417                         fhuse++;
 418                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 419                         return;
 420                 }
 421         }
 422 }
 423
 424
 425 /*
 426  * set the file in the given directory for vbox playback
 427  * also set the eof-flag
 428  * also set the counter-flag
 429  */
 430 void Port::set_vbox_play(const char *name, int offset)
 431 {
 432         struct lcr_msg *message;
 433
 434         /* use ser_box_tone() */
 435         set_vbox_tone("", name);
 436         if (p_tone_fh < 0)
 437                 return;
 438
 439         /* enable counter */
 440         p_tone_counter = 1;
 441
 442         /* seek */
 443         if (p_tone_name[0]) {
 444                 /* send message with counter value */
 445                 if (p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 446                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 447                         message->param.counter.current = offset;
 448                         message->param.counter.max = p_tone_size;
 449                         message_put(message);
 450                 }
 451         }
 452 }
 453
 454
 455 /*
 456  * set the playback speed (for recording playback with different speeds)
 457  */
 458 void Port::set_vbox_speed(int speed)
 459 {
 460         /* enable vbox play mode */
 461         p_tone_speed = speed;
 462 }
 463
 464 /*
 465  * read from the given file as specified in port_set_tone and return sample data
 466  * if the tone ends, the result may be less samples than requested
 467  */
 468 int Port::read_audio(unsigned char *buffer, int length)
 469 {
 470         int l = 0,len;
 471         int nodata=0; /* to detect 0-length files and avoid endless reopen */
 472         char filename[128];
 473         int tone_left_before; /* temp variable to determine the change in p_tone_left */
 474
 475         /* nothing */
 476         if (length == 0)
 477                 return(0);
 478
 479         len = length;
 480
 481         /* if there is no tone set, use silence */
 482         if (!p_tone_name[0])
 483                 return(0);
 484
 485         /* if the file pointer is not open, we open it */
 486         if (p_tone_fh<0 && p_tone_fetched==NULL) {
 487                 if (p_tone_dir[0]) {
 488                         SPRINT(filename, "%s", p_tone_name);
 489                         /* if file does not exist */
 490                         if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 491                                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 492                                 /* if file does not exist */
 493                                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 494                                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 495                                         goto try_loop;
 496                                 }
 497                                 fhuse++;
 498                         }
 499                 } else {
 500                         SPRINT(filename, "%s", p_tone_name);
 501                         /* if file does not exist */
 502                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 503                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 504                                 goto try_loop;
 505                         }
 506                         fhuse++;
 507                 }
 508                 PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 509         }
 510
 511 read_more:
 512         /* file descriptor is open read data */
 513         tone_left_before = p_tone_left;
 514         if (p_tone_fh >= 0) {
 515                 l = read_tone(p_tone_fh, buffer, p_tone_codec, len, p_tone_size, &p_tone_left, p_tone_speed);
 516                 if (l<0 || l>len) /* paranoia */
 517                         l=0;
 518                 buffer += l;
 519                 len -= l;
 520         }
 521         if (p_tone_fetched) {
 522                 l = read_tone_fetched(&p_tone_fetched, buffer, len, p_tone_size, &p_tone_left, p_tone_speed);
 523                 if (l<0 || l>len) /* paranoia */
 524                         l=0;
 525                 buffer += l;
 526                 len -= l;
 527         }
 528
 529         /* if counter is enabled, we check if we have a change */
 530         if (p_tone_counter && p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 531                 /* if we jumed to the next second */
 532                 if (((p_tone_size-p_tone_left)/8000) != (p_tone_size-tone_left_before)/8000) {
 533 //printf("\nsize=%d left=%d\n\n",p_tone_size,p_tone_left);
 534                         struct lcr_msg *message;
 535                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 536                         message->param.counter.current = (p_tone_size-p_tone_left)/8000;
 537                         message->param.counter.max = -1;
 538                         message_put(message);
 539                 }
 540         }
 541
 542         if (len==0)
 543                 return(length-len);
 544
 545         if (p_tone_fh >= 0) {
 546                 close(p_tone_fh);
 547                 p_tone_fh = -1;
 548                 fhuse--;
 549         }
 550         p_tone_fetched = NULL;
 551
 552         if (l)
 553                 nodata=0;
 554
 555         /* if the file has 0-length */
 556         if (nodata>1) {
 557                 PDEBUG(DEBUG_PORT, "PORT(%s) 0-length loop: %s\n", p_name, filename);
 558                 p_tone_name[0]=0;
 559                 p_tone_dir[0]=0;
 560                 return(length-len);
 561         }
 562
 563         /* if eof is reached, or if the normal file cannot be opened, continue with the loop file if possible */
 564 try_loop:
 565         if (p_tone_eof && ACTIVE_EPOINT(p_epointlist)) {
 566                 struct lcr_msg *message;
 567                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_EOF);
 568                 message_put(message);
 569         }
 570
 571         if (p_tone_dir[0]) {
 572                 /* if file does not exist */
 573                 SPRINT(filename, "%s_loop", p_tone_name);
 574                 if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 575                         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 576                         /* if file does not exist */
 577                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 578                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 579                                 p_tone_dir[0] = '\0';
 580                                 p_tone_name[0] = '\0';
 581                                 return(length-len);
 582                         }
 583                         fhuse++;
 584                 }
 585         } else {
 586                 SPRINT(filename, "%s_loop", p_tone_name);
 587                 /* if file does not exist */
 588                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 589                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 590                         p_tone_dir[0] = '\0';
 591                         p_tone_name[0] = '\0';
 592                         return(length-len);
 593                 }
 594                 fhuse++;
 595         }
 596         nodata++;
 597         PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 598
 599         /* now we have opened the loop */
 600         goto read_more;
 601 }
 602
 603
 604 /* Endpoint sends messages to the port
 605  * This is called by the message_epoint, inherited by child classes.
 606  * Therefor a return 1 means: "already handled here"
 607  */
 608 //extern struct lcr_msg *dddebug;
 609 int Port::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 610 {
 611         /* check if we got audio data from one remote port */
 612         switch(message_id) {
 613         case MESSAGE_TONE: /* play tone */
 614                 PDEBUG(DEBUG_PORT, "PORT(%s) setting tone '%s' dir '%s'\n", p_name, param->tone.name, param->tone.dir);
 615                 set_tone(param->tone.dir,param->tone.name);
 616                 return 1;
 617
 618         case MESSAGE_VBOX_TONE: /* play tone of answering machine */
 619                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine tone '%s' '%s'\n", p_name, param->tone.dir, param->tone.name);
 620                 set_vbox_tone(param->tone.dir, param->tone.name);
 621                 return 1;
 622
 623         case MESSAGE_VBOX_PLAY: /* play recording of answering machine */
 624                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine file to play '%s' (offset %d seconds)\n", p_name, param->play.file, param->play.offset);
 625                 set_vbox_play(param->play.file, param->play.offset);
 626                 return 1;
 627
 628         case MESSAGE_VBOX_PLAY_SPEED: /* set speed of playback (recording of answering machine) */
 629                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine playback speed %d (times)\n", p_name, param->speed);
 630                 set_vbox_speed(param->speed);
 631                 return 1;
 632
 633         case MESSAGE_BRIDGE: /* create / join / leave / destroy bridge */
 634                 PDEBUG(DEBUG_PORT, "PORT(%s) bridging to id %d\n", p_name, param->bridge_id);
 635                 bridge(param->bridge_id);
 636                 return 1;
 637         }
 638
 639         return 0;
 640 }
 641
 642
 643 /* wave header structure */
 644 struct fmt {
 645         unsigned short  stereo; /* 1 = mono, 2 = stereo */
 646         unsigned short  channels; /* number of channels */
 647         unsigned int    sample_rate; /* sample rate */
 648         unsigned int    data_rate; /* data rate */
 649         unsigned short  bytes_sample; /* bytes per sample (all channels) */
 650         unsigned short  bits_sample; /* bits per sample (one channel) */
 651 };
 652
 653
 654 /*
 655  * open record file (actually a wave file with empty header which will be
 656  * written before close, because we do not know the size yet)
 657  * type=1 record annoucement,  type=0 record audio stream, type=2 record vbox
 658  */
 659 int Port::open_record(int type, int vbox, int skip, char *extension, int anon_ignore, const char *vbox_email, int vbox_email_file)
 660 {
 661         /* RIFFxxxxWAVEfmt xxxx(fmt-size)dataxxxx... */
 662         char dummyheader[8+4+8+sizeof(fmt)+8];
 663         char filename[256];
 664         time_t now;
 665         struct tm *now_tm;
 666         int ret;
 667
 668         if (!extension) {
 669                 PERROR("Port(%d) not an extension\n", p_serial);
 670                 return(0);
 671         }
 672         SCPY(p_record_extension, extension);
 673         p_record_anon_ignore = anon_ignore;
 674         SCPY(p_record_vbox_email, vbox_email);
 675         p_record_vbox_email_file = vbox_email_file;
 676
 677         if (p_record) {
 678                 PERROR("Port(%d) already recording\n", p_serial);
 679                 return(0);
 680         }
 681
 682         if (vbox != 0)
 683                 SPRINT(filename, "%s/%s/vbox", EXTENSION_DATA, p_record_extension);
 684         else
 685                 SPRINT(filename, "%s/%s/recordings", EXTENSION_DATA, p_record_extension);
 686         if (mkdir(filename, 0755) < 0) {
 687                 if (errno != EEXIST) {
 688                         PERROR("Port(%d) cannot create directory '%s'\n", p_serial, filename);
 689                         return(0);
 690                 }
 691         }
 692
 693         if (vbox == 1)
 694                 UPRINT(strchr(filename,'\0'), "/announcement");
 695         else {
 696                 time(&now);
 697                 now_tm = localtime(&now);
 698                 UPRINT(strchr(filename,'\0'), "/%04d-%02d-%02d_%02d%02d%02d", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
 699         }
 700         if (vbox == 2) {
 701                 p_record_vbox_year = now_tm->tm_year;
 702                 p_record_vbox_mon = now_tm->tm_mon;
 703                 p_record_vbox_mday = now_tm->tm_mday;
 704                 p_record_vbox_hour = now_tm->tm_hour;
 705                 p_record_vbox_min = now_tm->tm_min;
 706         }
 707
 708         /* check, if file exists (especially when an extension calls the same extension) */
 709         if (vbox != 1)
 710         if ((p_record = fopen(filename, "r"))) {
 711                 fclose(p_record);
 712                 SCAT(filename, "_2nd");
 713         }
 714
 715         p_record = fopen(filename, "w");
 716         if (!p_record) {
 717                 PERROR("Port(%d) cannot record because file cannot be opened '%s'\n", p_serial, filename);
 718                 return(0);
 719         }
 720         update_rxoff();
 721         fduse++;
 722
 723         p_record_type = type;
 724         p_record_vbox = vbox;
 725         p_record_skip = skip;
 726         p_record_length = 0;
 727         switch(p_record_type) {
 728                 case CODEC_MONO:
 729                 case CODEC_STEREO:
 730                 case CODEC_8BIT:
 731                 ret = fwrite(dummyheader, sizeof(dummyheader), 1, p_record);
 732                 break;
 733
 734                 case CODEC_LAW:
 735                 break;
 736         }
 737         UCPY(p_record_filename, filename);
 738
 739         PDEBUG(DEBUG_PORT, "Port(%d) recording started with file name '%s'\n", p_serial, filename);
 740         return(1);
 741 }
 742
 743
 744 /*
 745  * close the recoding file, put header in front and rename
 746  */
 747 void Port::close_record(int beep, int mute)
 748 {
 749         static signed short beep_mono[256];
 750         unsigned int size = 0, wsize = 0;
 751         struct fmt fmt;
 752         char filename[512], indexname[512];
 753         FILE *fp;
 754         int i, ii;
 755         char number[256], callerid[256];
 756         char *p;
 757         struct caller_info callerinfo;
 758         const char *valid_chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_.-!$%&/()=+*;~";
 759         int ret;
 760
 761         if (!p_record)
 762                 return;
 763         PDEBUG(DEBUG_PORT, "data still in record buffer: %d (dir %d)\n", (p_record_buffer_writep - p_record_buffer_readp) & RECORD_BUFFER_MASK, p_record_buffer_dir);
 764
 765         memcpy(&callerinfo, &p_callerinfo, sizeof(struct caller_info));
 766 //      apply_callerid_restriction(p_record_anon_ignore, callerinfo.id, &callerinfo.ntype, &callerinfo.present, &callerinfo.screen, callerinfo.extension, callerinfo.name);
 767
 768         SCPY(number, p_dialinginfo.id);
 769         SCPY(callerid, numberrize_callerinfo(callerinfo.id, callerinfo.ntype, options.national, options.international));
 770         if (callerid[0] == '\0') {
 771                 if (callerinfo.present == INFO_PRESENT_RESTRICTED)
 772                         UCPY(callerid,"anonymous");
 773                 else
 774                         UCPY(callerid,"unknown");
 775         }
 776
 777         /* change verboten digits */
 778         p = callerid;
 779         while((p=strchr(p,'*')))
 780                 *(p++) = 'x';
 781         p = callerid;
 782         while((p=strchr(p,'/')))
 783                 *(p++) = 'x';
 784         p = number;
 785         while((p=strchr(p,'*')))
 786                 *(p++) = 'x';
 787         p = number;
 788         while((p=strchr(p,'/')))
 789                 *(p++) = 'x';
 790         i = 0;
 791         ii = strlen(callerid);
 792         while(i < ii) {
 793                 if (!strchr(valid_chars, callerid[i]))
 794                         callerid[i] = '_';
 795                 i++;
 796         }
 797         i = 0;
 798         ii = strlen(number);
 799         while(i < ii) {
 800                 if (!strchr(valid_chars, number[i]))
 801                         number[i] = '_';
 802                 i++;
 803         }
 804
 805         /* mute */
 806         if (mute && p_record_type==CODEC_MONO) {
 807                 i = p_record_length;
 808                 if (i > mute)
 809                         i = mute;
 810                 fseek(p_record, -(i<<1), SEEK_END);
 811                 p_record_length -= (i<<1);
 812         }
 813         /* add beep to the end of recording */
 814         if (beep && p_record_type==CODEC_MONO) {
 815                 i = 0;
 816                 while(i < 256) {
 817                         beep_mono[i] = (signed short)(sin((double)i / 5.688888888889 * 2.0 * 3.1415927) * 2000.0);
 818                         i++;
 819                 }
 820                 i = 0;
 821                 while(i < beep) {
 822                         ret = fwrite(beep_mono, sizeof(beep_mono), 1, p_record);
 823                         i += sizeof(beep_mono);
 824                         p_record_length += sizeof(beep_mono);
 825                 }
 826         }
 827
 828         /* complete header */
 829         switch(p_record_type) {
 830                 case CODEC_MONO:
 831                 case CODEC_STEREO:
 832                 case CODEC_8BIT:
 833                 /* cue */
 834                 fprintf(p_record, "cue %c%c%c%c%c%c%c%c", 4, 0, 0, 0, 0,0,0,0);
 835
 836                 /* LIST */
 837                 fprintf(p_record, "LIST%c%c%c%cadtl", 4, 0, 0, 0);
 838
 839                 /* go to header */
 840                 fseek(p_record, 0, SEEK_SET);
 841
 842                 /* WAVEfmt xxxx(fmt-size)dataxxxx[data]cue xxxx0000LISTxxxxadtl*/
 843                 size = p_record_length;
 844                 wsize = 4+8+sizeof(fmt)+8+size+8+4+8+4;
 845
 846                 /* RIFF */
 847                 fprintf(p_record, "RIFF%c%c%c%c", (unsigned char)(wsize&0xff), (unsigned char)((wsize>>8)&0xff), (unsigned char)((wsize>>16)&0xff), (unsigned char)(wsize>>24));
 848
 849                 /* WAVE */
 850                 fprintf(p_record, "WAVE");
 851
 852                 /* fmt */
 853                 fprintf(p_record, "fmt %c%c%c%c", (unsigned int)sizeof(fmt), 0, 0, 0);
 854                 switch(p_record_type) {
 855                         case CODEC_MONO:
 856                         fmt.stereo = 1;
 857                         fmt.channels = 1;
 858                         fmt.sample_rate = 8000; /* samples/sec */
 859                         fmt.data_rate = 16000; /* full data rate */
 860                         fmt.bytes_sample = 2; /* all channels */
 861                         fmt.bits_sample = 16; /* one channel */
 862                         break;
 863
 864                         case CODEC_STEREO:
 865                         fmt.stereo = 1;
 866                         fmt.channels = 2;
 867                         fmt.sample_rate = 8000; /* samples/sec */
 868                         fmt.data_rate = 32000; /* full data rate */
 869                         fmt.bytes_sample = 4; /* all channels */
 870                         fmt.bits_sample = 16; /* one channel */
 871                         break;
 872
 873                         case CODEC_8BIT:
 874                         fmt.stereo = 1;
 875                         fmt.channels = 1;
 876                         fmt.sample_rate = 8000; /* samples/sec */
 877                         fmt.data_rate = 8000; /* full data rate */
 878                         fmt.bytes_sample = 1; /* all channels */
 879                         fmt.bits_sample = 8; /* one channel */
 880                         break;
 881                 }
 882                 ret = fwrite(&fmt, sizeof(fmt), 1, p_record);
 883
 884                 /* data */
 885                 fprintf(p_record, "data%c%c%c%c", (unsigned char)(size&0xff), (unsigned char)((size>>8)&0xff), (unsigned char)((size>>16)&0xff), (unsigned char)(size>>24));
 886
 887                 /* rename file */
 888                 if (p_record_vbox == 1)
 889                         SPRINT(filename, "%s.wav", p_record_filename);
 890                 else
 891                         SPRINT(filename, "%s_%s-%s.wav", p_record_filename, callerid, number);
 892                 break;
 893
 894                 case CODEC_LAW:
 895                 /* rename file */
 896                 if (p_record_vbox == 1)
 897                         SPRINT(filename, "%s.isdn", p_record_filename);
 898                 else
 899                         SPRINT(filename, "%s_%s-%s.isdn", p_record_filename, callerid, number);
 900                 break;
 901         }
 902
 903         fclose(p_record);
 904         fduse--;
 905         p_record = NULL;
 906         update_rxoff();
 907
 908         if (rename(p_record_filename, filename) < 0) {
 909                 PERROR("Port(%d) cannot rename from '%s' to '%s'\n", p_serial, p_record_filename, filename);
 910                 return;
 911         }
 912
 913         PDEBUG(DEBUG_PORT, "Port(%d) recording is written and renamed to '%s' and must have the following size:%lu raw:%lu samples:%lu\n", p_serial, filename, wsize+8, size, size>>1);
 914
 915         if (p_record_vbox == 2) {
 916                 SPRINT(indexname, "%s/%s/vbox/index", EXTENSION_DATA, p_record_extension);
 917                 if ((fp = fopen(indexname,"a"))) {
 918                         fduse++;
 919
 920                         /* remove path from file name */
 921                         p = filename;
 922                         while(strchr(p, '/'))
 923                                 p = strchr(p, '/')+1;
 924                         fprintf(fp, "%s %d %d %d %d %d %s\n", p, p_record_vbox_year, p_record_vbox_mon, p_record_vbox_mday, p_record_vbox_hour, p_record_vbox_min, callerid);
 925
 926                         fclose(fp);
 927                         fduse--;
 928                 } else {
 929                         PERROR("Port(%d) cannot open index file '%s' to append.\n", p_serial, indexname);
 930                 }
 931
 932                 /* send email with sample*/
 933                 if (p_record_vbox_email[0]) {
 934                         send_mail(p_record_vbox_email_file?filename:(char *)"", callerid, callerinfo.extension, callerinfo.name, p_record_vbox_email, p_record_vbox_year, p_record_vbox_mon, p_record_vbox_mday, p_record_vbox_hour, p_record_vbox_min, p_record_extension);
 935                 }
 936         }
 937 }
 938
 939
 940 /*
 941  * recording function
 942  * Records all data from down and from up into one single stream.
 943  * Both streams may have gaps or jitter.
 944  * A Jitter buffer for both streams is used to compensate jitter.
 945  *
 946  * If one stream (dir) received packets, they are stored to a
 947  * buffer to wait for the other stream (dir), so both streams can
 948  * be combined. If the buffer is full, it's content is written
 949  * without mixing stream. (assuming only one stram (dir) exists.)
 950  * A flag is used to indicate what stream is currently in buffer.
 951  *
 952  * NOTE: First stereo sample (odd) is from down, second is from up.
 953  */
 954 void Port::record(unsigned char *data, int length, int dir_fromup)
 955 {
 956         unsigned char write_buffer[1024], *d;
 957         signed short *s;
 958         int free, i, ii;
 959         signed int sample;
 960         int ret;
 961
 962         /* no recording */
 963         if (!p_record || !length)
 964                 return;
 965
 966         /* skip data from local caller (dtmf input) */
 967         if (p_record_skip && !dir_fromup) {
 968                 /* more to skip than we have */
 969                 if (p_record_skip > length) {
 970                         p_record_skip -= length;
 971                         return;
 972                 }
 973                 /* less to skip */
 974                 data += p_record_skip;
 975                 length -= p_record_skip;
 976                 p_record_skip = 0;
 977         }
 978
 979 //printf("dir=%d len=%d\n", dir_fromup, length);
 980
 981         free = ((p_record_buffer_readp - p_record_buffer_writep - 1) & RECORD_BUFFER_MASK);
 982
 983 //PDEBUG(DEBUG_PORT, "record(data,%d,%d): free=%d, p_record_buffer_dir=%d, p_record_buffer_readp=%d, p_record_buffer_writep=%d.\n", length, dir_fromup, free, p_record_buffer_dir, p_record_buffer_readp, p_record_buffer_writep);
 984
 985         /* the buffer stores the same data stream */
 986         if (dir_fromup == p_record_buffer_dir) {
 987 same_again:
 988
 989 //printf("same free=%d length=%d\n", free, length);
 990                 /* first write what we can to the buffer */
 991                 while(free && length) {
 992                         p_record_buffer[p_record_buffer_writep] = audio_law_to_s32[*data++];
 993                         p_record_buffer_writep = (p_record_buffer_writep + 1) & RECORD_BUFFER_MASK;
 994                         free--;
 995                         length--;
 996                 }
 997                 /* all written, so we return */
 998                 if (!length)
 999                         return;
1000                 /* still data left, buffer is full, so we need to write a chunk to file */
1001                 switch(p_record_type) {
1002                         case CODEC_MONO:
1003                         s = (signed short *)write_buffer;
1004                         i = 0;
1005                         while(i < 256) {
1006                                 *s++ = p_record_buffer[p_record_buffer_readp];
1007                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1008                                 i++;
1009                         }
1010                         ret = fwrite(write_buffer, 512, 1, p_record);
1011                         p_record_length += 512;
1012                         break;
1013
1014                         case CODEC_STEREO:
1015                         s = (signed short *)write_buffer;
1016                         if (p_record_buffer_dir) {
1017                                 i = 0;
1018                                 while(i < 256) {
1019                                         *s++ = 0; /* nothing from down */
1020                                         *s++ = p_record_buffer[p_record_buffer_readp];
1021                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1022                                         i++;
1023                                 }
1024                         } else {
1025                                 i = 0;
1026                                 while(i < 256) {
1027                                         *s++ = p_record_buffer[p_record_buffer_readp];
1028                                         *s++ = 0; /* nothing from up */
1029                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1030                                         i++;
1031                                 }
1032                         }
1033                         ret = fwrite(write_buffer, 1024, 1, p_record);
1034                         p_record_length += 1024;
1035                         break;
1036
1037                         case CODEC_8BIT:
1038                         d = write_buffer;
1039                         i = 0;
1040                         while(i < 256) {
1041                                 *d++ = ((unsigned short)(p_record_buffer[p_record_buffer_readp]+0x8000)) >> 8;
1042                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1043                                 i++;
1044                         }
1045                         ret = fwrite(write_buffer, 512, 1, p_record);
1046                         p_record_length += 512;
1047                         break;
1048
1049                         case CODEC_LAW:
1050                         d = write_buffer;
1051                         i = 0;
1052                         while(i < 256) {
1053                                 *d++ = audio_s16_to_law[p_record_buffer[p_record_buffer_readp] & 0xffff];
1054                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1055                                 i++;
1056                         }
1057                         ret = fwrite(write_buffer, 256, 1, p_record);
1058                         p_record_length += 256;
1059                         break;
1060                 }
1061                 /* because we still have data, we write again */
1062                 free += 256;
1063                 goto same_again;
1064         }
1065         /* the buffer stores the other stream */
1066
1067 different_again:
1068         /* if buffer empty, change it */
1069         if (p_record_buffer_readp == p_record_buffer_writep) {
1070                 p_record_buffer_dir = dir_fromup;
1071                 goto same_again;
1072         }
1073         /* how much data can we mix ? */
1074         ii = (p_record_buffer_writep - p_record_buffer_readp) & RECORD_BUFFER_MASK;
1075         if (length < ii)
1076                 ii = length;
1077
1078         if (ii > 256)
1079                 ii = 256;
1080 //printf("same ii=%d length=%d\n", ii, length);
1081 //PDEBUG(DEBUG_PORT, "record(data,%d,%d): free=%d, p_record_buffer_dir=%d, p_record_buffer_readp=%d, p_record_buffer_writep=%d: mixing %d bytes.\n", length, dir_fromup, free, p_record_buffer_dir, p_record_buffer_readp, p_record_buffer_writep, ii);
1082
1083         /* write data mixed with the buffer */
1084         switch(p_record_type) {
1085                 case CODEC_MONO:
1086                 s = (signed short *)write_buffer;
1087                 i = 0;
1088                 while(i < ii) {
1089                         sample = p_record_buffer[p_record_buffer_readp]
1090                                 + audio_law_to_s32[*data++];
1091                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1092                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1093                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1094                         *s++ = sample;
1095                         i++;
1096                 }
1097                 ret = fwrite(write_buffer, ii<<1, 1, p_record);
1098                 p_record_length += (ii<<1);
1099                 break;
1100
1101                 case CODEC_STEREO:
1102                 s = (signed short *)write_buffer;
1103                 if (p_record_buffer_dir) {
1104                         i = 0;
1105                         while(i < ii) {
1106                                 *s++ = audio_law_to_s32[*data++];
1107                                 *s++ = p_record_buffer[p_record_buffer_readp];
1108                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1109                                 i++;
1110                         }
1111                 } else {
1112                         i = 0;
1113                         while(i < ii) {
1114                                 *s++ = p_record_buffer[p_record_buffer_readp];
1115                                 *s++ = audio_law_to_s32[*data++];
1116                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1117                                 i++;
1118                         }
1119                 }
1120                 ret = fwrite(write_buffer, ii<<2, 1, p_record);
1121                 p_record_length += (ii<<2);
1122                 break;
1123
1124                 case CODEC_8BIT:
1125                 d = write_buffer;
1126                 i = 0;
1127                 while(i < ii) {
1128                         sample = p_record_buffer[p_record_buffer_readp]
1129                                 + audio_law_to_s32[*data++];
1130                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1131                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1132                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1133                         *d++ = (sample+0x8000) >> 8;
1134                         i++;
1135                 }
1136                 ret = fwrite(write_buffer, ii, 1, p_record);
1137                 p_record_length += ii;
1138                 break;
1139
1140                 case CODEC_LAW:
1141                 d = write_buffer;
1142                 i = 0;
1143                 while(i < ii) {
1144                         sample = p_record_buffer[p_record_buffer_readp]
1145                                 + audio_law_to_s32[*data++];
1146                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1147                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1148                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1149                         *d++ = audio_s16_to_law[sample & 0xffff];
1150                         i++;
1151                 }
1152                 ret = fwrite(write_buffer, ii, 1, p_record);
1153                 p_record_length += ii;
1154                 break;
1155         }
1156         length -= ii;
1157         /* still data */
1158         if (length)
1159                 goto different_again;
1160         /* no data (maybe buffer) */
1161         return;
1162
1163 }
1164
1165 void Port::update_rxoff(void)
1166 {
1167 }
1168
1169 void Port::update_load(void)
1170 {
1171 }
1172
1173
1174 /*
1175  * bridge handling
1176  */
1177
1178 int bridge_timeout(struct lcr_timer *timer, void *instance, int index);
1179
1180 static void remove_bridge(struct port_bridge *bridge, class Port *port)
1181 {
1182         struct port_bridge **temp = &p_bridge_first;
1183         while (*temp) {
1184                 if (*temp == bridge) {
1185                         struct port_bridge_member **memberp = &bridge->first, *member;
1186
1187                         /* loop until we are found */
1188                         while(*memberp) {
1189                                 if ((*memberp)->port == port) {
1190                                         member = *memberp;
1191                                         *memberp = member->next;
1192                                         FREE(member, sizeof(struct port_bridge_member));
1193                                         memuse--;
1194 #ifndef TEST_CONFERENCE
1195                                         if (bridge->first && bridge->first->next && !bridge->first->next->next) {
1196 #else
1197                                         if (bridge->first && !bridge->first->next) {
1198 #endif
1199                                                 PDEBUG(DEBUG_PORT, "bridge %u is no conference anymore\n", bridge->bridge_id);
1200                                                 del_timer(&bridge->timer);
1201                                         }
1202                                         break;
1203                                 }
1204                                 memberp = &((*memberp)->next);
1205                         }
1206                         /* if bridge is empty, remove it */
1207                         if (bridge->first == NULL) {
1208                                 PDEBUG(DEBUG_PORT, "Remove bridge %u\n", bridge->bridge_id);
1209                                 *temp = bridge->next;
1210                                 FREE(bridge, sizeof(struct port_bridge));
1211                                 memuse--;
1212                         }
1213                         return;
1214                 }
1215                 temp = &((*temp)->next);
1216         }
1217         PERROR("Bridge %p not found in list\n", bridge);
1218 }
1219
1220 void Port::bridge(unsigned int bridge_id)
1221 {
1222         struct port_bridge_member **memberp;
1223
1224         /* Remove bridge, if we leave bridge or if we join a different bridge. */
1225         if (p_bridge && bridge_id != p_bridge->bridge_id) {
1226                 PDEBUG(DEBUG_PORT, "Remove port %u from bridge %u, because out new bridge is %u\n", p_serial, p_bridge->bridge_id, bridge_id);
1227                 remove_bridge(p_bridge, this);
1228                 p_bridge = NULL;
1229         }
1230
1231         /* if we leave bridge */
1232         if (!bridge_id)
1233                 return;
1234
1235         /* find bridge */
1236         if (!p_bridge) {
1237                 struct port_bridge *temp = p_bridge_first;
1238
1239                 while (temp) {
1240                         if (temp->bridge_id == bridge_id)
1241                                 break;
1242                         temp = temp->next;
1243                 }
1244                 p_bridge = temp;
1245                 if (p_bridge)
1246                         PDEBUG(DEBUG_PORT, "Port %d found existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1247         }
1248
1249         /* create bridge */
1250         if (!p_bridge) {
1251                 struct port_bridge **temp = &p_bridge_first;
1252
1253                 p_bridge = (struct port_bridge *) MALLOC(sizeof(struct port_bridge));
1254                 memuse++;
1255                 p_bridge->bridge_id = bridge_id;
1256
1257                 /* attach bridge instance to list */
1258                 while (*temp)
1259                         temp = &((*temp)->next);
1260                 *temp = p_bridge;
1261                 PDEBUG(DEBUG_PORT, "Port %d creating not existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1262         }
1263
1264         /* attach to bridge */
1265         memberp = &p_bridge->first;
1266         while(*memberp) {
1267                 if ((*memberp)->port == this) {
1268                         /* already joined */
1269                         return;
1270                 }
1271                 memberp = &((*memberp)->next);
1272         }
1273         *memberp = (struct port_bridge_member *) MALLOC(sizeof(struct port_bridge_member));
1274         memuse++;
1275         (*memberp)->port = this;
1276         /* check if bridge becomes a conference */
1277 #ifndef TEST_CONFERENCE
1278         if (p_bridge->first->next && p_bridge->first->next->next && !p_bridge->first->next->next->next) {
1279                 p_bridge->first->next->next->write_p = 0;
1280                 p_bridge->first->next->next->min_space = 0;
1281                 memset(p_bridge->first->next->next->buffer, silence, sizeof((*memberp)->buffer));
1282 #else
1283         if (p_bridge->first->next && !p_bridge->first->next->next) {
1284 #endif
1285                 p_bridge->first->next->write_p = 0;
1286                 p_bridge->first->next->min_space = 0;
1287                 memset(p_bridge->first->next->buffer, silence, sizeof((*memberp)->buffer));
1288                 p_bridge->first->write_p = 0;
1289                 p_bridge->first->min_space = 0;
1290                 memset(p_bridge->first->buffer, silence, sizeof((*memberp)->buffer));
1291                 memset(p_bridge->sum_buffer, 0, sizeof(p_bridge->sum_buffer));
1292                 p_bridge->read_p = 0;
1293                 add_timer(&p_bridge->timer, bridge_timeout, p_bridge, 0);
1294                 schedule_timer(&p_bridge->timer, 0, 20000); /* 20 MS */
1295                 p_bridge->sample_count = 0;
1296                 PDEBUG(DEBUG_PORT, "bridge %u became a conference\n", p_bridge->bridge_id);
1297         }
1298 }
1299
1300 /* send data to remote Port or add to sum buffer */
1301 int Port::bridge_tx(unsigned char *data, int len)
1302 {
1303         int write_p, space;
1304         struct port_bridge_member *member;
1305         signed long *sum;
1306         unsigned char *buf;
1307
1308         /* less than two ports, so drop */
1309         if (!p_bridge || !p_bridge->first || !p_bridge->first->next)
1310                 return -EIO;
1311 #ifndef TEST_CONFERENCE
1312         /* two ports, so bridge */
1313         if (!p_bridge->first->next->next) {
1314                 if (p_bridge->first->port == this)
1315                         return p_bridge->first->next->port->bridge_rx(data, len);
1316                 if (p_bridge->first->next->port == this)
1317                         return p_bridge->first->port->bridge_rx(data, len);
1318                 return -EINVAL;
1319         }
1320 #endif
1321         /* more than two ports... */
1322         member = p_bridge->first;
1323         while (member) {
1324                 if (member->port == this)
1325                         break;
1326                 member = member->next;
1327         }
1328         if (!member)
1329                 return -EINVAL;
1330         write_p = member->write_p;
1331         /* calculate space, so write pointer will not overrun (or reach) read pointer in ring buffer */
1332         space = (p_bridge->read_p - write_p - 1) & (BRIDGE_BUFFER - 1);
1333         /* clip len, if it does not fit */
1334         if (space < len)
1335                 len = space;
1336         /* apply audio samples to sum buffer */
1337         sum = p_bridge->sum_buffer;
1338         buf = member->buffer;
1339         while (len--) {
1340                 sum[write_p] += audio_law_to_s32[*data];
1341                 buf[write_p] = *data++;
1342                 write_p = (write_p + 1) & (BRIDGE_BUFFER - 1);
1343         }
1344         /* raise write pointer */
1345         member->write_p = write_p;
1346
1347         return 0;
1348 }
1349
1350 int bridge_timeout(struct lcr_timer *timer, void *instance, int index)
1351 {
1352         struct port_bridge *bridge = (struct port_bridge *)instance;
1353         struct port_bridge_member *member = bridge->first;
1354         unsigned long long timer_time;
1355         signed long *sum, sample;
1356         unsigned char buffer[160], *buf, *d;
1357         int i, read_p, space;
1358
1359         bridge->sample_count += 160;
1360
1361         /* schedule exactly 20ms from last schedule */
1362         timer_time = timer->timeout.tv_sec * MICRO_SECONDS + timer->timeout.tv_usec;
1363         timer_time += 20000; /* 20 MS */
1364         timer->timeout.tv_sec = timer_time / MICRO_SECONDS;
1365         timer->timeout.tv_usec = timer_time % MICRO_SECONDS;
1366         timer->active = 1;
1367
1368         while (member) {
1369                 /* calculate transmit data */
1370                 read_p = bridge->read_p;
1371                 sum = bridge->sum_buffer;
1372                 buf = member->buffer;
1373                 d = buffer;
1374                 for (i = 0; i < 160; i++) {
1375                         sample = sum[read_p];
1376                         sample -= audio_law_to_s32[buf[read_p]];
1377                         buf[read_p] = silence;
1378                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1379                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1380                         *d++ = audio_s16_to_law[sample & 0xffff];
1381                         read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1382                 }
1383                 /* send data */
1384                 member->port->bridge_rx(buffer, 160);
1385                 /* raise write pointer, if read pointer would overrun them */
1386                 space = ((member->write_p - bridge->read_p) & (BRIDGE_BUFFER - 1)) - 160;
1387                 if (space < 0) {
1388                         space = 0;
1389                         member->write_p = read_p;
1390 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has buffer underrun\n", bridge->bridge_id, member->port->p_serial);
1391                 }
1392                 /* find minimum delay */
1393                 if (space < member->min_space)
1394                         member->min_space = space;
1395                 /* check if we should reduce buffer */
1396                 if (bridge->sample_count >= 8000*5) {
1397                         /* reduce buffer by minimum delay */
1398 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has min space of %d samples\n", bridge->bridge_id, member->port->p_serial, member->min_space);
1399                         member->write_p = (member->write_p - member->min_space) & (BRIDGE_BUFFER - 1);
1400                         member->min_space = 1000000; /* infinite */
1401                 }
1402                 member = member->next;
1403         }
1404
1405         /* clear sample data */
1406         read_p = bridge->read_p;
1407         sum = bridge->sum_buffer;
1408         for (i = 0; i < 160; i++) {
1409                 sum[read_p] = 0;
1410                 read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1411         }
1412
1413         /* raise read pointer */
1414         bridge->read_p = read_p;
1415
1416         if (bridge->sample_count >= 8000*5)
1417                 bridge->sample_count = 0;
1418
1419         return 0;
1420 }
1421
1422
1423 /* receive data from remote Port (dummy, needs to be inherited) */
1424 int Port::bridge_rx(unsigned char *data, int len)
1425 {
1426         return 0; /* datenklo */
1427 }
1428