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, struct interface *interface)
 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         if (interface)
 163                 SCPY(p_interface_name, interface->name);
 164         p_tone_dir[0] = '\0';
 165         p_type = type;
 166         p_serial = port_serial++;
 167         p_tone_fh = -1;
 168         p_tone_fetched = NULL;
 169         p_tone_name[0] = '\0';
 170         p_state = PORT_STATE_IDLE;
 171         p_epointlist = NULL;
 172         memset(&p_callerinfo, 0, sizeof(p_callerinfo));
 173         memset(&p_dialinginfo, 0, sizeof(p_dialinginfo));
 174         memset(&p_connectinfo, 0, sizeof(p_connectinfo));
 175         memset(&p_redirinfo, 0, sizeof(p_redirinfo));
 176         memset(&p_capainfo, 0, sizeof(p_capainfo));
 177         p_echotest = 0;
 178         p_bridge = 0;
 179
 180         /* call recording */
 181         p_record = NULL;
 182         p_tap = 0;
 183         p_record_type = 0;
 184         p_record_length = 0;
 185         p_record_skip = 0;
 186         p_record_filename[0] = '\0';
 187         p_record_buffer_readp = 0;
 188         p_record_buffer_writep = 0;
 189         p_record_buffer_dir = 0;
 190
 191         /* append port to chain */
 192         next = NULL;
 193         temp = port_first;
 194         tempp = &port_first;
 195         while(temp) {
 196                 tempp = &temp->next;
 197                 temp = temp->next;
 198         }
 199         *tempp = this;
 200
 201         classuse++;
 202
 203         PDEBUG(DEBUG_PORT, "new port (%d) of type 0x%x, name '%s' interface '%s'\n", p_serial, type, portname, p_interface_name);
 204 }
 205
 206
 207 /*
 208  * port destructor
 209  */
 210 Port::~Port(void)
 211 {
 212         class Port *temp, **tempp;
 213         struct lcr_msg *message;
 214
 215         PDEBUG(DEBUG_PORT, "removing port (%d) of type 0x%x, name '%s' interface '%s'\n", p_serial, p_type, p_name, p_interface_name);
 216
 217         if (p_bridge) {
 218                 PDEBUG(DEBUG_PORT, "Removing us from bridge %u\n", p_bridge->bridge_id);
 219                 remove_bridge(p_bridge, this);
 220         }
 221
 222         if (p_record)
 223                 close_record(0, 0);
 224
 225         classuse--;
 226
 227         /* disconnect port from endpoint */
 228         while(p_epointlist) {
 229                 /* send disconnect */
 230                 message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
 231                 message->param.disconnectinfo.cause = 16;
 232                 message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
 233                 message_put(message);
 234                 /* remove endpoint */
 235                 free_epointlist(p_epointlist);
 236         }
 237
 238         /* remove port from chain */
 239         temp=port_first;
 240         tempp=&port_first;
 241         while(temp) {
 242                 if (temp == this)
 243                         break;
 244                 tempp = &temp->next;
 245                 temp = temp->next;
 246         }
 247         if (temp == NULL)
 248                 FATAL("PORT(%s) port not in port's list.\n", p_name);
 249         /* detach */
 250         *tempp=this->next;
 251
 252         /* close open tones file */
 253         if (p_tone_fh >= 0) {
 254                 close(p_tone_fh);
 255                 p_tone_fh = -1;
 256                 fhuse--;
 257         }
 258         p_tone_fetched = NULL;
 259 }
 260
 261 PORT_STATE_NAMES
 262
 263 /* set new endpoint state
 264  */
 265 void Port::new_state(int state)
 266 {
 267         PDEBUG(DEBUG_PORT, "PORT(%s) new state %s --> %s\n", p_name, state_name[p_state], state_name[state]);
 268         p_state = state;
 269 }
 270
 271
 272 /*
 273  * find the port with port_id
 274  */
 275 class Port *find_port_id(unsigned int port_id)
 276 {
 277         class Port *port = port_first;
 278
 279         while(port) {
 280 //printf("comparing: '%s' with '%s'\n", name, port->name);
 281                 if (port->p_serial == port_id)
 282                         return(port);
 283                 port = port->next;
 284         }
 285
 286         return(NULL);
 287 }
 288
 289
 290 /*
 291  * set echotest
 292  */
 293 void Port::set_echotest(int echotest)
 294 {
 295         p_echotest = echotest;
 296 }
 297
 298
 299 /*
 300  * set the file in the tone directory with the given name
 301  */
 302 void Port::set_tone(const char *dir, const char *name)
 303 {
 304         int fh;
 305         char filename[128];
 306
 307         if (name == NULL)
 308                 name = "";
 309
 310         if (!dir || !dir[0])
 311                 dir = options.tones_dir; /* just in case we have no PmISDN instance */
 312
 313         /* no counter, no eof, normal speed */
 314         p_tone_counter = 0;
 315         p_tone_eof = 0;
 316         p_tone_speed = 1;
 317         p_tone_codec = CODEC_LAW;
 318
 319         if (p_tone_fh >= 0) {
 320                 close(p_tone_fh);
 321                 p_tone_fh = -1;
 322                 fhuse--;
 323         }
 324         p_tone_fetched = NULL;
 325
 326         if (name[0]) {
 327                 if (name[0] == '/') {
 328                         SPRINT(p_tone_name, "%s", name);
 329                         p_tone_dir[0] = '\0';
 330                 } else {
 331                         SCPY(p_tone_dir, dir);
 332                         SCPY(p_tone_name, name);
 333                 }
 334                 /* trigger playback */
 335                 update_load();
 336         } else {
 337                 p_tone_name[0]= '\0';
 338                 p_tone_dir[0]= '\0';
 339                 return;
 340         }
 341
 342         if (!!strncmp(name,"cause_",6))
 343                 return;
 344
 345         /* now we check if the cause exists, otherwhise we use error tone. */
 346         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, 0, 0))) {
 347                 p_tone_fetched = NULL;
 348                 return;
 349         }
 350         SPRINT(filename, "%s_loop", p_tone_name);
 351         if ((p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, 0, 0))) {
 352                 p_tone_fetched = NULL;
 353                 return;
 354         }
 355         SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 356         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 357                 close(fh);
 358                 return;
 359         }
 360         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 361         if ((fh=open_tone(filename, &p_tone_codec, 0, 0)) >= 0) {
 362                 close(fh);
 363                 return;
 364         }
 365
 366         if (!strcmp(name,"cause_00") || !strcmp(name,"cause_10")) {
 367                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using release tone\n", p_name, name+6);
 368                 SPRINT(p_tone_name,"release");
 369         } else
 370         if (!strcmp(name,"cause_11")) {
 371                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using busy tone\n", p_name, name+6);
 372                 SPRINT(p_tone_name,"busy");
 373         } else {
 374                 PDEBUG(DEBUG_PORT, "PORT(%s) Given Cause 0x%s has no tone, using error tone\n", p_name, name+6);
 375                 SPRINT(p_tone_name,"error");
 376         }
 377 }
 378
 379
 380 /*
 381  * set the file in the tone directory for vbox playback
 382  * also set the play_eof-flag
 383  */
 384 void Port::set_vbox_tone(const char *dir, const char *name)
 385 {
 386         char filename[256];
 387
 388         p_tone_speed = 1;
 389         p_tone_counter = 0;
 390         p_tone_codec = CODEC_LAW;
 391         p_tone_eof = 1;
 392
 393         if (p_tone_fh >= 0) {
 394                 close(p_tone_fh);
 395                 p_tone_fh = -1;
 396                 fhuse--;
 397         }
 398         p_tone_fetched = NULL;
 399
 400         SPRINT(p_tone_dir,  dir);
 401         SPRINT(p_tone_name,  name);
 402         /* trigger playback */
 403         update_load();
 404
 405         /* now we check if the cause exists, otherwhise we use error tone. */
 406         if (p_tone_dir[0]) {
 407                 if ((p_tone_fetched=open_tone_fetched(p_tone_dir, p_tone_name, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 408                         PDEBUG(DEBUG_PORT, "PORT(%s) opening fetched tone: %s\n", p_name, p_tone_name);
 409                         return;
 410                 }
 411                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 412                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 413                         fhuse++;
 414                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 415                         return;
 416                 }
 417         } else {
 418                 SPRINT(filename, "%s", p_tone_name);
 419                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) >= 0) {
 420                         fhuse++;
 421                         PDEBUG(DEBUG_PORT, "PORT(%s) opening tone: %s\n", p_name, filename);
 422                         return;
 423                 }
 424         }
 425 }
 426
 427
 428 /*
 429  * set the file in the given directory for vbox playback
 430  * also set the eof-flag
 431  * also set the counter-flag
 432  */
 433 void Port::set_vbox_play(const char *name, int offset)
 434 {
 435         struct lcr_msg *message;
 436
 437         /* use ser_box_tone() */
 438         set_vbox_tone("", name);
 439         if (p_tone_fh < 0)
 440                 return;
 441
 442         /* enable counter */
 443         p_tone_counter = 1;
 444
 445         /* seek */
 446         if (p_tone_name[0]) {
 447                 /* send message with counter value */
 448                 if (p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 449                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 450                         message->param.counter.current = offset;
 451                         message->param.counter.max = p_tone_size;
 452                         message_put(message);
 453                 }
 454         }
 455 }
 456
 457
 458 /*
 459  * set the playback speed (for recording playback with different speeds)
 460  */
 461 void Port::set_vbox_speed(int speed)
 462 {
 463         /* enable vbox play mode */
 464         p_tone_speed = speed;
 465 }
 466
 467 /*
 468  * read from the given file as specified in port_set_tone and return sample data
 469  * if the tone ends, the result may be less samples than requested
 470  */
 471 int Port::read_audio(unsigned char *buffer, int length)
 472 {
 473         int l = 0,len;
 474         int nodata=0; /* to detect 0-length files and avoid endless reopen */
 475         char filename[128];
 476         int tone_left_before; /* temp variable to determine the change in p_tone_left */
 477
 478         /* nothing */
 479         if (length == 0)
 480                 return(0);
 481
 482         len = length;
 483
 484         /* if there is no tone set, use silence */
 485         if (!p_tone_name[0])
 486                 return(0);
 487
 488         /* if the file pointer is not open, we open it */
 489         if (p_tone_fh<0 && p_tone_fetched==NULL) {
 490                 if (p_tone_dir[0]) {
 491                         SPRINT(filename, "%s", p_tone_name);
 492                         /* if file does not exist */
 493                         if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 494                                 SPRINT(filename, "%s/%s/%s", SHARE_DATA, p_tone_dir, p_tone_name);
 495                                 /* if file does not exist */
 496                                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 497                                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 498                                         goto try_loop;
 499                                 }
 500                                 fhuse++;
 501                         }
 502                 } else {
 503                         SPRINT(filename, "%s", p_tone_name);
 504                         /* if file does not exist */
 505                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 506                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone: %s\n", p_name, filename);
 507                                 goto try_loop;
 508                         }
 509                         fhuse++;
 510                 }
 511                 PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 512         }
 513
 514 read_more:
 515         /* file descriptor is open read data */
 516         tone_left_before = p_tone_left;
 517         if (p_tone_fh >= 0) {
 518                 l = read_tone(p_tone_fh, buffer, p_tone_codec, len, p_tone_size, &p_tone_left, p_tone_speed);
 519                 if (l<0 || l>len) /* paranoia */
 520                         l=0;
 521                 buffer += l;
 522                 len -= l;
 523         }
 524         if (p_tone_fetched) {
 525                 l = read_tone_fetched(&p_tone_fetched, buffer, len, p_tone_size, &p_tone_left, p_tone_speed);
 526                 if (l<0 || l>len) /* paranoia */
 527                         l=0;
 528                 buffer += l;
 529                 len -= l;
 530         }
 531
 532         /* if counter is enabled, we check if we have a change */
 533         if (p_tone_counter && p_tone_size>=0 && ACTIVE_EPOINT(p_epointlist)) {
 534                 /* if we jumed to the next second */
 535                 if (((p_tone_size-p_tone_left)/8000) != (p_tone_size-tone_left_before)/8000) {
 536 //printf("\nsize=%d left=%d\n\n",p_tone_size,p_tone_left);
 537                         struct lcr_msg *message;
 538                         message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_COUNTER);
 539                         message->param.counter.current = (p_tone_size-p_tone_left)/8000;
 540                         message->param.counter.max = -1;
 541                         message_put(message);
 542                 }
 543         }
 544
 545         if (len==0)
 546                 return(length-len);
 547
 548         if (p_tone_fh >= 0) {
 549                 close(p_tone_fh);
 550                 p_tone_fh = -1;
 551                 fhuse--;
 552         }
 553         p_tone_fetched = NULL;
 554
 555         if (l)
 556                 nodata=0;
 557
 558         /* if the file has 0-length */
 559         if (nodata>1) {
 560                 PDEBUG(DEBUG_PORT, "PORT(%s) 0-length loop: %s\n", p_name, filename);
 561                 p_tone_name[0]=0;
 562                 p_tone_dir[0]=0;
 563                 return(length-len);
 564         }
 565
 566         /* if eof is reached, or if the normal file cannot be opened, continue with the loop file if possible */
 567 try_loop:
 568         if (p_tone_eof && ACTIVE_EPOINT(p_epointlist)) {
 569                 struct lcr_msg *message;
 570                 message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_TONE_EOF);
 571                 message_put(message);
 572         }
 573
 574         if (p_tone_dir[0]) {
 575                 /* if file does not exist */
 576                 SPRINT(filename, "%s_loop", p_tone_name);
 577                 if (!(p_tone_fetched=open_tone_fetched(p_tone_dir, filename, &p_tone_codec, &p_tone_size, &p_tone_left))) {
 578                         SPRINT(filename, "%s/%s/%s_loop", SHARE_DATA, p_tone_dir, p_tone_name);
 579                         /* if file does not exist */
 580                         if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 581                                 PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 582                                 p_tone_dir[0] = '\0';
 583                                 p_tone_name[0] = '\0';
 584                                 return(length-len);
 585                         }
 586                         fhuse++;
 587                 }
 588         } else {
 589                 SPRINT(filename, "%s_loop", p_tone_name);
 590                 /* if file does not exist */
 591                 if ((p_tone_fh=open_tone(filename, &p_tone_codec, &p_tone_size, &p_tone_left)) < 0) {
 592                         PDEBUG(DEBUG_PORT, "PORT(%s) no tone loop: %s\n",p_name, filename);
 593                         p_tone_dir[0] = '\0';
 594                         p_tone_name[0] = '\0';
 595                         return(length-len);
 596                 }
 597                 fhuse++;
 598         }
 599         nodata++;
 600         PDEBUG(DEBUG_PORT, "PORT(%s) opening %stone: %s\n", p_name, p_tone_fetched?"fetched ":"", filename);
 601
 602         /* now we have opened the loop */
 603         goto read_more;
 604 }
 605
 606
 607 /* Endpoint sends messages to the port
 608  * This is called by the message_epoint, inherited by child classes.
 609  * Therefor a return 1 means: "already handled here"
 610  */
 611 //extern struct lcr_msg *dddebug;
 612 int Port::message_epoint(unsigned int epoint_id, int message_id, union parameter *param)
 613 {
 614         /* check if we got audio data from one remote port */
 615         switch(message_id) {
 616         case MESSAGE_TONE: /* play tone */
 617                 PDEBUG(DEBUG_PORT, "PORT(%s) setting tone '%s' dir '%s'\n", p_name, param->tone.name, param->tone.dir);
 618                 set_tone(param->tone.dir,param->tone.name);
 619                 return 1;
 620
 621         case MESSAGE_VBOX_TONE: /* play tone of answering machine */
 622                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine tone '%s' '%s'\n", p_name, param->tone.dir, param->tone.name);
 623                 set_vbox_tone(param->tone.dir, param->tone.name);
 624                 return 1;
 625
 626         case MESSAGE_VBOX_PLAY: /* play recording of answering machine */
 627                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine file to play '%s' (offset %d seconds)\n", p_name, param->play.file, param->play.offset);
 628                 set_vbox_play(param->play.file, param->play.offset);
 629                 return 1;
 630
 631         case MESSAGE_VBOX_PLAY_SPEED: /* set speed of playback (recording of answering machine) */
 632                 PDEBUG(DEBUG_PORT, "PORT(%s) set answering machine playback speed %d (times)\n", p_name, param->speed);
 633                 set_vbox_speed(param->speed);
 634                 return 1;
 635
 636         case MESSAGE_BRIDGE: /* create / join / leave / destroy bridge */
 637                 PDEBUG(DEBUG_PORT, "PORT(%s) bridging to id %d\n", p_name, param->bridge_id);
 638                 bridge(param->bridge_id);
 639                 return 1;
 640         }
 641
 642         return 0;
 643 }
 644
 645
 646 /* wave header structure */
 647 struct fmt {
 648         unsigned short  stereo; /* 1 = mono, 2 = stereo */
 649         unsigned short  channels; /* number of channels */
 650         unsigned int    sample_rate; /* sample rate */
 651         unsigned int    data_rate; /* data rate */
 652         unsigned short  bytes_sample; /* bytes per sample (all channels) */
 653         unsigned short  bits_sample; /* bits per sample (one channel) */
 654 };
 655
 656
 657 /*
 658  * open record file (actually a wave file with empty header which will be
 659  * written before close, because we do not know the size yet)
 660  * type=1 record annoucement,  type=0 record audio stream, type=2 record vbox
 661  */
 662 int Port::open_record(int type, int vbox, int skip, char *extension, int anon_ignore, const char *vbox_email, int vbox_email_file)
 663 {
 664         /* RIFFxxxxWAVEfmt xxxx(fmt-size)dataxxxx... */
 665         char dummyheader[8+4+8+sizeof(fmt)+8];
 666         char filename[256];
 667         time_t now;
 668         struct tm *now_tm;
 669         int ret;
 670
 671         if (!extension) {
 672                 PERROR("Port(%d) not an extension\n", p_serial);
 673                 return(0);
 674         }
 675         SCPY(p_record_extension, extension);
 676         p_record_anon_ignore = anon_ignore;
 677         SCPY(p_record_vbox_email, vbox_email);
 678         p_record_vbox_email_file = vbox_email_file;
 679
 680         if (p_record) {
 681                 PERROR("Port(%d) already recording\n", p_serial);
 682                 return(0);
 683         }
 684
 685         if (vbox != 0)
 686                 SPRINT(filename, "%s/%s/vbox", EXTENSION_DATA, p_record_extension);
 687         else
 688                 SPRINT(filename, "%s/%s/recordings", EXTENSION_DATA, p_record_extension);
 689         if (mkdir(filename, 0755) < 0) {
 690                 if (errno != EEXIST) {
 691                         PERROR("Port(%d) cannot create directory '%s'\n", p_serial, filename);
 692                         return(0);
 693                 }
 694         }
 695
 696         if (vbox == 1)
 697                 UPRINT(strchr(filename,'\0'), "/announcement");
 698         else {
 699                 time(&now);
 700                 now_tm = localtime(&now);
 701                 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);
 702         }
 703         if (vbox == 2) {
 704                 p_record_vbox_year = now_tm->tm_year;
 705                 p_record_vbox_mon = now_tm->tm_mon;
 706                 p_record_vbox_mday = now_tm->tm_mday;
 707                 p_record_vbox_hour = now_tm->tm_hour;
 708                 p_record_vbox_min = now_tm->tm_min;
 709         }
 710
 711         /* check, if file exists (especially when an extension calls the same extension) */
 712         if (vbox != 1)
 713         if ((p_record = fopen(filename, "r"))) {
 714                 fclose(p_record);
 715                 SCAT(filename, "_2nd");
 716         }
 717
 718         p_record = fopen(filename, "w");
 719         if (!p_record) {
 720                 PERROR("Port(%d) cannot record because file cannot be opened '%s'\n", p_serial, filename);
 721                 return(0);
 722         }
 723         update_rxoff();
 724         fduse++;
 725
 726         p_record_type = type;
 727         p_record_vbox = vbox;
 728         p_record_skip = skip;
 729         p_record_length = 0;
 730         switch(p_record_type) {
 731                 case CODEC_MONO:
 732                 case CODEC_STEREO:
 733                 case CODEC_8BIT:
 734                 ret = fwrite(dummyheader, sizeof(dummyheader), 1, p_record);
 735                 break;
 736
 737                 case CODEC_LAW:
 738                 break;
 739         }
 740         UCPY(p_record_filename, filename);
 741
 742         PDEBUG(DEBUG_PORT, "Port(%d) recording started with file name '%s'\n", p_serial, filename);
 743         return(1);
 744 }
 745
 746
 747 /*
 748  * close the recoding file, put header in front and rename
 749  */
 750 void Port::close_record(int beep, int mute)
 751 {
 752         static signed short beep_mono[256];
 753         unsigned int size = 0, wsize = 0;
 754         struct fmt fmt;
 755         char filename[512], indexname[512];
 756         FILE *fp;
 757         int i, ii;
 758         char number[256], callerid[256];
 759         char *p;
 760         struct caller_info callerinfo;
 761         const char *valid_chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_.-!$%&/()=+*;~";
 762         int ret;
 763
 764         if (!p_record)
 765                 return;
 766         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);
 767
 768         memcpy(&callerinfo, &p_callerinfo, sizeof(struct caller_info));
 769 //      apply_callerid_restriction(p_record_anon_ignore, callerinfo.id, &callerinfo.ntype, &callerinfo.present, &callerinfo.screen, callerinfo.extension, callerinfo.name);
 770
 771         SCPY(number, p_dialinginfo.id);
 772         SCPY(callerid, numberrize_callerinfo(callerinfo.id, callerinfo.ntype, options.national, options.international));
 773         if (callerid[0] == '\0') {
 774                 if (callerinfo.present == INFO_PRESENT_RESTRICTED)
 775                         UCPY(callerid,"anonymous");
 776                 else
 777                         UCPY(callerid,"unknown");
 778         }
 779
 780         /* change verboten digits */
 781         p = callerid;
 782         while((p=strchr(p,'*')))
 783                 *(p++) = 'x';
 784         p = callerid;
 785         while((p=strchr(p,'/')))
 786                 *(p++) = 'x';
 787         p = number;
 788         while((p=strchr(p,'*')))
 789                 *(p++) = 'x';
 790         p = number;
 791         while((p=strchr(p,'/')))
 792                 *(p++) = 'x';
 793         i = 0;
 794         ii = strlen(callerid);
 795         while(i < ii) {
 796                 if (!strchr(valid_chars, callerid[i]))
 797                         callerid[i] = '_';
 798                 i++;
 799         }
 800         i = 0;
 801         ii = strlen(number);
 802         while(i < ii) {
 803                 if (!strchr(valid_chars, number[i]))
 804                         number[i] = '_';
 805                 i++;
 806         }
 807
 808         /* mute */
 809         if (mute && p_record_type==CODEC_MONO) {
 810                 i = p_record_length;
 811                 if (i > mute)
 812                         i = mute;
 813                 fseek(p_record, -(i<<1), SEEK_END);
 814                 p_record_length -= (i<<1);
 815         }
 816         /* add beep to the end of recording */
 817         if (beep && p_record_type==CODEC_MONO) {
 818                 i = 0;
 819                 while(i < 256) {
 820                         beep_mono[i] = (signed short)(sin((double)i / 5.688888888889 * 2.0 * 3.1415927) * 2000.0);
 821                         i++;
 822                 }
 823                 i = 0;
 824                 while(i < beep) {
 825                         ret = fwrite(beep_mono, sizeof(beep_mono), 1, p_record);
 826                         i += sizeof(beep_mono);
 827                         p_record_length += sizeof(beep_mono);
 828                 }
 829         }
 830
 831         /* complete header */
 832         switch(p_record_type) {
 833                 case CODEC_MONO:
 834                 case CODEC_STEREO:
 835                 case CODEC_8BIT:
 836                 /* cue */
 837                 fprintf(p_record, "cue %c%c%c%c%c%c%c%c", 4, 0, 0, 0, 0,0,0,0);
 838
 839                 /* LIST */
 840                 fprintf(p_record, "LIST%c%c%c%cadtl", 4, 0, 0, 0);
 841
 842                 /* go to header */
 843                 fseek(p_record, 0, SEEK_SET);
 844
 845                 /* WAVEfmt xxxx(fmt-size)dataxxxx[data]cue xxxx0000LISTxxxxadtl*/
 846                 size = p_record_length;
 847                 wsize = 4+8+sizeof(fmt)+8+size+8+4+8+4;
 848
 849                 /* RIFF */
 850                 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));
 851
 852                 /* WAVE */
 853                 fprintf(p_record, "WAVE");
 854
 855                 /* fmt */
 856                 fprintf(p_record, "fmt %c%c%c%c", (unsigned int)sizeof(fmt), 0, 0, 0);
 857                 switch(p_record_type) {
 858                         case CODEC_MONO:
 859                         fmt.stereo = 1;
 860                         fmt.channels = 1;
 861                         fmt.sample_rate = 8000; /* samples/sec */
 862                         fmt.data_rate = 16000; /* full data rate */
 863                         fmt.bytes_sample = 2; /* all channels */
 864                         fmt.bits_sample = 16; /* one channel */
 865                         break;
 866
 867                         case CODEC_STEREO:
 868                         fmt.stereo = 1;
 869                         fmt.channels = 2;
 870                         fmt.sample_rate = 8000; /* samples/sec */
 871                         fmt.data_rate = 32000; /* full data rate */
 872                         fmt.bytes_sample = 4; /* all channels */
 873                         fmt.bits_sample = 16; /* one channel */
 874                         break;
 875
 876                         case CODEC_8BIT:
 877                         fmt.stereo = 1;
 878                         fmt.channels = 1;
 879                         fmt.sample_rate = 8000; /* samples/sec */
 880                         fmt.data_rate = 8000; /* full data rate */
 881                         fmt.bytes_sample = 1; /* all channels */
 882                         fmt.bits_sample = 8; /* one channel */
 883                         break;
 884                 }
 885                 ret = fwrite(&fmt, sizeof(fmt), 1, p_record);
 886
 887                 /* data */
 888                 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));
 889
 890                 /* rename file */
 891                 if (p_record_vbox == 1)
 892                         SPRINT(filename, "%s.wav", p_record_filename);
 893                 else
 894                         SPRINT(filename, "%s_%s-%s.wav", p_record_filename, callerid, number);
 895                 break;
 896
 897                 case CODEC_LAW:
 898                 /* rename file */
 899                 if (p_record_vbox == 1)
 900                         SPRINT(filename, "%s.isdn", p_record_filename);
 901                 else
 902                         SPRINT(filename, "%s_%s-%s.isdn", p_record_filename, callerid, number);
 903                 break;
 904         }
 905
 906         fclose(p_record);
 907         fduse--;
 908         p_record = NULL;
 909         update_rxoff();
 910
 911         if (rename(p_record_filename, filename) < 0) {
 912                 PERROR("Port(%d) cannot rename from '%s' to '%s'\n", p_serial, p_record_filename, filename);
 913                 return;
 914         }
 915
 916         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);
 917
 918         if (p_record_vbox == 2) {
 919                 SPRINT(indexname, "%s/%s/vbox/index", EXTENSION_DATA, p_record_extension);
 920                 if ((fp = fopen(indexname,"a"))) {
 921                         fduse++;
 922
 923                         /* remove path from file name */
 924                         p = filename;
 925                         while(strchr(p, '/'))
 926                                 p = strchr(p, '/')+1;
 927                         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);
 928
 929                         fclose(fp);
 930                         fduse--;
 931                 } else {
 932                         PERROR("Port(%d) cannot open index file '%s' to append.\n", p_serial, indexname);
 933                 }
 934
 935                 /* send email with sample*/
 936                 if (p_record_vbox_email[0]) {
 937                         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);
 938                 }
 939         }
 940 }
 941
 942
 943 /*
 944  * recording function
 945  * Records all data from down and from up into one single stream.
 946  * Both streams may have gaps or jitter.
 947  * A Jitter buffer for both streams is used to compensate jitter.
 948  *
 949  * If one stream (dir) received packets, they are stored to a
 950  * buffer to wait for the other stream (dir), so both streams can
 951  * be combined. If the buffer is full, it's content is written
 952  * without mixing stream. (assuming only one stram (dir) exists.)
 953  * A flag is used to indicate what stream is currently in buffer.
 954  *
 955  * NOTE: First stereo sample (odd) is from down, second is from up.
 956  */
 957 void Port::record(unsigned char *data, int length, int dir_fromup)
 958 {
 959         unsigned char write_buffer[1024], *d;
 960         signed short *s;
 961         int free, i, ii;
 962         signed int sample;
 963         int ret;
 964
 965         /* no recording */
 966         if (!p_record || !length)
 967                 return;
 968
 969         /* skip data from local caller (dtmf input) */
 970         if (p_record_skip && !dir_fromup) {
 971                 /* more to skip than we have */
 972                 if (p_record_skip > length) {
 973                         p_record_skip -= length;
 974                         return;
 975                 }
 976                 /* less to skip */
 977                 data += p_record_skip;
 978                 length -= p_record_skip;
 979                 p_record_skip = 0;
 980         }
 981
 982 //printf("dir=%d len=%d\n", dir_fromup, length);
 983
 984         free = ((p_record_buffer_readp - p_record_buffer_writep - 1) & RECORD_BUFFER_MASK);
 985
 986 //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);
 987
 988         /* the buffer stores the same data stream */
 989         if (dir_fromup == p_record_buffer_dir) {
 990 same_again:
 991
 992 //printf("same free=%d length=%d\n", free, length);
 993                 /* first write what we can to the buffer */
 994                 while(free && length) {
 995                         p_record_buffer[p_record_buffer_writep] = audio_law_to_s32[*data++];
 996                         p_record_buffer_writep = (p_record_buffer_writep + 1) & RECORD_BUFFER_MASK;
 997                         free--;
 998                         length--;
 999                 }
1000                 /* all written, so we return */
1001                 if (!length)
1002                         return;
1003                 /* still data left, buffer is full, so we need to write a chunk to file */
1004                 switch(p_record_type) {
1005                         case CODEC_MONO:
1006                         s = (signed short *)write_buffer;
1007                         i = 0;
1008                         while(i < 256) {
1009                                 *s++ = p_record_buffer[p_record_buffer_readp];
1010                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1011                                 i++;
1012                         }
1013                         ret = fwrite(write_buffer, 512, 1, p_record);
1014                         p_record_length += 512;
1015                         break;
1016
1017                         case CODEC_STEREO:
1018                         s = (signed short *)write_buffer;
1019                         if (p_record_buffer_dir) {
1020                                 i = 0;
1021                                 while(i < 256) {
1022                                         *s++ = 0; /* nothing from down */
1023                                         *s++ = p_record_buffer[p_record_buffer_readp];
1024                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1025                                         i++;
1026                                 }
1027                         } else {
1028                                 i = 0;
1029                                 while(i < 256) {
1030                                         *s++ = p_record_buffer[p_record_buffer_readp];
1031                                         *s++ = 0; /* nothing from up */
1032                                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1033                                         i++;
1034                                 }
1035                         }
1036                         ret = fwrite(write_buffer, 1024, 1, p_record);
1037                         p_record_length += 1024;
1038                         break;
1039
1040                         case CODEC_8BIT:
1041                         d = write_buffer;
1042                         i = 0;
1043                         while(i < 256) {
1044                                 *d++ = ((unsigned short)(p_record_buffer[p_record_buffer_readp]+0x8000)) >> 8;
1045                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1046                                 i++;
1047                         }
1048                         ret = fwrite(write_buffer, 512, 1, p_record);
1049                         p_record_length += 512;
1050                         break;
1051
1052                         case CODEC_LAW:
1053                         d = write_buffer;
1054                         i = 0;
1055                         while(i < 256) {
1056                                 *d++ = audio_s16_to_law[p_record_buffer[p_record_buffer_readp] & 0xffff];
1057                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1058                                 i++;
1059                         }
1060                         ret = fwrite(write_buffer, 256, 1, p_record);
1061                         p_record_length += 256;
1062                         break;
1063                 }
1064                 /* because we still have data, we write again */
1065                 free += 256;
1066                 goto same_again;
1067         }
1068         /* the buffer stores the other stream */
1069
1070 different_again:
1071         /* if buffer empty, change it */
1072         if (p_record_buffer_readp == p_record_buffer_writep) {
1073                 p_record_buffer_dir = dir_fromup;
1074                 goto same_again;
1075         }
1076         /* how much data can we mix ? */
1077         ii = (p_record_buffer_writep - p_record_buffer_readp) & RECORD_BUFFER_MASK;
1078         if (length < ii)
1079                 ii = length;
1080
1081         if (ii > 256)
1082                 ii = 256;
1083 //printf("same ii=%d length=%d\n", ii, length);
1084 //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);
1085
1086         /* write data mixed with the buffer */
1087         switch(p_record_type) {
1088                 case CODEC_MONO:
1089                 s = (signed short *)write_buffer;
1090                 i = 0;
1091                 while(i < ii) {
1092                         sample = p_record_buffer[p_record_buffer_readp]
1093                                 + audio_law_to_s32[*data++];
1094                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1095                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1096                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1097                         *s++ = sample;
1098                         i++;
1099                 }
1100                 ret = fwrite(write_buffer, ii<<1, 1, p_record);
1101                 p_record_length += (ii<<1);
1102                 break;
1103
1104                 case CODEC_STEREO:
1105                 s = (signed short *)write_buffer;
1106                 if (p_record_buffer_dir) {
1107                         i = 0;
1108                         while(i < ii) {
1109                                 *s++ = audio_law_to_s32[*data++];
1110                                 *s++ = p_record_buffer[p_record_buffer_readp];
1111                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1112                                 i++;
1113                         }
1114                 } else {
1115                         i = 0;
1116                         while(i < ii) {
1117                                 *s++ = p_record_buffer[p_record_buffer_readp];
1118                                 *s++ = audio_law_to_s32[*data++];
1119                                 p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1120                                 i++;
1121                         }
1122                 }
1123                 ret = fwrite(write_buffer, ii<<2, 1, p_record);
1124                 p_record_length += (ii<<2);
1125                 break;
1126
1127                 case CODEC_8BIT:
1128                 d = write_buffer;
1129                 i = 0;
1130                 while(i < ii) {
1131                         sample = p_record_buffer[p_record_buffer_readp]
1132                                 + audio_law_to_s32[*data++];
1133                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1134                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1135                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1136                         *d++ = (sample+0x8000) >> 8;
1137                         i++;
1138                 }
1139                 ret = fwrite(write_buffer, ii, 1, p_record);
1140                 p_record_length += ii;
1141                 break;
1142
1143                 case CODEC_LAW:
1144                 d = write_buffer;
1145                 i = 0;
1146                 while(i < ii) {
1147                         sample = p_record_buffer[p_record_buffer_readp]
1148                                 + audio_law_to_s32[*data++];
1149                         p_record_buffer_readp = (p_record_buffer_readp + 1) & RECORD_BUFFER_MASK;
1150                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1151                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1152                         *d++ = audio_s16_to_law[sample & 0xffff];
1153                         i++;
1154                 }
1155                 ret = fwrite(write_buffer, ii, 1, p_record);
1156                 p_record_length += ii;
1157                 break;
1158         }
1159         length -= ii;
1160         /* still data */
1161         if (length)
1162                 goto different_again;
1163         /* no data (maybe buffer) */
1164         return;
1165
1166 }
1167
1168 void Port::tap(unsigned char *data, int length, int dir_fromup)
1169 {
1170 }
1171
1172 void Port::update_rxoff(void)
1173 {
1174 }
1175
1176 void Port::update_load(void)
1177 {
1178 }
1179
1180
1181 /*
1182  * bridge handling
1183  */
1184
1185 int bridge_timeout(struct lcr_timer *timer, void *instance, int index);
1186
1187 static void remove_bridge(struct port_bridge *bridge, class Port *port)
1188 {
1189         struct port_bridge **temp = &p_bridge_first;
1190         while (*temp) {
1191                 if (*temp == bridge) {
1192                         struct port_bridge_member **memberp = &bridge->first, *member;
1193
1194                         /* loop until we are found */
1195                         while(*memberp) {
1196                                 if ((*memberp)->port == port) {
1197                                         member = *memberp;
1198                                         *memberp = member->next;
1199                                         FREE(member, sizeof(struct port_bridge_member));
1200                                         memuse--;
1201 #ifndef TEST_CONFERENCE
1202                                         if (bridge->first && bridge->first->next && !bridge->first->next->next) {
1203 #else
1204                                         if (bridge->first && !bridge->first->next) {
1205 #endif
1206                                                 PDEBUG(DEBUG_PORT, "bridge %u is no conference anymore\n", bridge->bridge_id);
1207                                                 del_timer(&bridge->timer);
1208                                         }
1209                                         break;
1210                                 }
1211                                 memberp = &((*memberp)->next);
1212                         }
1213                         /* if bridge is empty, remove it */
1214                         if (bridge->first == NULL) {
1215                                 PDEBUG(DEBUG_PORT, "Remove bridge %u\n", bridge->bridge_id);
1216                                 *temp = bridge->next;
1217                                 FREE(bridge, sizeof(struct port_bridge));
1218                                 memuse--;
1219                         }
1220                         return;
1221                 }
1222                 temp = &((*temp)->next);
1223         }
1224         PERROR("Bridge %p not found in list\n", bridge);
1225 }
1226
1227 void Port::bridge(unsigned int bridge_id)
1228 {
1229         struct port_bridge_member **memberp;
1230
1231         /* Remove bridge, if we leave bridge or if we join a different bridge. */
1232         if (p_bridge && bridge_id != p_bridge->bridge_id) {
1233                 PDEBUG(DEBUG_PORT, "Remove port %u from bridge %u, because out new bridge is %u\n", p_serial, p_bridge->bridge_id, bridge_id);
1234                 remove_bridge(p_bridge, this);
1235                 p_bridge = NULL;
1236         }
1237
1238         /* if we leave bridge */
1239         if (!bridge_id)
1240                 return;
1241
1242         /* find bridge */
1243         if (!p_bridge) {
1244                 struct port_bridge *temp = p_bridge_first;
1245
1246                 while (temp) {
1247                         if (temp->bridge_id == bridge_id)
1248                                 break;
1249                         temp = temp->next;
1250                 }
1251                 p_bridge = temp;
1252                 if (p_bridge)
1253                         PDEBUG(DEBUG_PORT, "Port %d found existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1254         }
1255
1256         /* create bridge */
1257         if (!p_bridge) {
1258                 struct port_bridge **temp = &p_bridge_first;
1259
1260                 p_bridge = (struct port_bridge *) MALLOC(sizeof(struct port_bridge));
1261                 memuse++;
1262                 p_bridge->bridge_id = bridge_id;
1263
1264                 /* attach bridge instance to list */
1265                 while (*temp)
1266                         temp = &((*temp)->next);
1267                 *temp = p_bridge;
1268                 PDEBUG(DEBUG_PORT, "Port %d creating not existing bridge %u.\n", p_serial, p_bridge->bridge_id);
1269         }
1270
1271         /* attach to bridge */
1272         memberp = &p_bridge->first;
1273         while(*memberp) {
1274                 if ((*memberp)->port == this) {
1275                         /* already joined */
1276                         return;
1277                 }
1278                 memberp = &((*memberp)->next);
1279         }
1280         *memberp = (struct port_bridge_member *) MALLOC(sizeof(struct port_bridge_member));
1281         memuse++;
1282         (*memberp)->port = this;
1283         /* check if bridge becomes a conference */
1284 #ifndef TEST_CONFERENCE
1285         if (p_bridge->first->next && p_bridge->first->next->next && !p_bridge->first->next->next->next) {
1286                 p_bridge->first->next->next->write_p = 0;
1287                 p_bridge->first->next->next->min_space = 0;
1288                 memset(p_bridge->first->next->next->buffer, silence, sizeof((*memberp)->buffer));
1289 #else
1290         if (p_bridge->first->next && !p_bridge->first->next->next) {
1291 #endif
1292                 p_bridge->first->next->write_p = 0;
1293                 p_bridge->first->next->min_space = 0;
1294                 memset(p_bridge->first->next->buffer, silence, sizeof((*memberp)->buffer));
1295                 p_bridge->first->write_p = 0;
1296                 p_bridge->first->min_space = 0;
1297                 memset(p_bridge->first->buffer, silence, sizeof((*memberp)->buffer));
1298                 memset(p_bridge->sum_buffer, 0, sizeof(p_bridge->sum_buffer));
1299                 p_bridge->read_p = 0;
1300                 add_timer(&p_bridge->timer, bridge_timeout, p_bridge, 0);
1301                 schedule_timer(&p_bridge->timer, 0, 20000); /* 20 MS */
1302                 p_bridge->sample_count = 0;
1303                 PDEBUG(DEBUG_PORT, "bridge %u became a conference\n", p_bridge->bridge_id);
1304         }
1305 }
1306
1307 /* send data to remote Port or add to sum buffer */
1308 int Port::bridge_tx(unsigned char *data, int len)
1309 {
1310         int write_p, space;
1311         struct port_bridge_member *member;
1312         signed long *sum;
1313         unsigned char *buf;
1314
1315         /* less than two ports, so drop */
1316         if (!p_bridge || !p_bridge->first || !p_bridge->first->next)
1317                 return -EIO;
1318 #ifndef TEST_CONFERENCE
1319         /* two ports, so bridge */
1320         if (!p_bridge->first->next->next) {
1321                 if (p_bridge->first->port == this)
1322                         return p_bridge->first->next->port->bridge_rx(data, len);
1323                 if (p_bridge->first->next->port == this)
1324                         return p_bridge->first->port->bridge_rx(data, len);
1325                 return -EINVAL;
1326         }
1327 #endif
1328         /* more than two ports... */
1329         member = p_bridge->first;
1330         while (member) {
1331                 if (member->port == this)
1332                         break;
1333                 member = member->next;
1334         }
1335         if (!member)
1336                 return -EINVAL;
1337         write_p = member->write_p;
1338         /* calculate space, so write pointer will not overrun (or reach) read pointer in ring buffer */
1339         space = (p_bridge->read_p - write_p - 1) & (BRIDGE_BUFFER - 1);
1340         /* clip len, if it does not fit */
1341         if (space < len)
1342                 len = space;
1343         /* apply audio samples to sum buffer */
1344         sum = p_bridge->sum_buffer;
1345         buf = member->buffer;
1346         while (len--) {
1347                 sum[write_p] += audio_law_to_s32[*data];
1348                 buf[write_p] = *data++;
1349                 write_p = (write_p + 1) & (BRIDGE_BUFFER - 1);
1350         }
1351         /* raise write pointer */
1352         member->write_p = write_p;
1353
1354         return 0;
1355 }
1356
1357 int bridge_timeout(struct lcr_timer *timer, void *instance, int index)
1358 {
1359         struct port_bridge *bridge = (struct port_bridge *)instance;
1360         struct port_bridge_member *member = bridge->first;
1361         unsigned long long timer_time;
1362         signed long *sum, sample;
1363         unsigned char buffer[160], *buf, *d;
1364         int i, read_p, space;
1365
1366         bridge->sample_count += 160;
1367
1368         /* schedule exactly 20ms from last schedule */
1369         timer_time = timer->timeout.tv_sec * MICRO_SECONDS + timer->timeout.tv_usec;
1370         timer_time += 20000; /* 20 MS */
1371         timer->timeout.tv_sec = timer_time / MICRO_SECONDS;
1372         timer->timeout.tv_usec = timer_time % MICRO_SECONDS;
1373         timer->active = 1;
1374
1375         while (member) {
1376                 /* calculate transmit data */
1377                 read_p = bridge->read_p;
1378                 sum = bridge->sum_buffer;
1379                 buf = member->buffer;
1380                 d = buffer;
1381                 for (i = 0; i < 160; i++) {
1382                         sample = sum[read_p];
1383                         sample -= audio_law_to_s32[buf[read_p]];
1384                         buf[read_p] = silence;
1385                         if (sample < SHORT_MIN) sample = SHORT_MIN;
1386                         if (sample > SHORT_MAX) sample = SHORT_MAX;
1387                         *d++ = audio_s16_to_law[sample & 0xffff];
1388                         read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1389                 }
1390                 /* send data */
1391                 member->port->bridge_rx(buffer, 160);
1392                 /* raise write pointer, if read pointer would overrun them */
1393                 space = ((member->write_p - bridge->read_p) & (BRIDGE_BUFFER - 1)) - 160;
1394                 if (space < 0) {
1395                         space = 0;
1396                         member->write_p = read_p;
1397 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has buffer underrun\n", bridge->bridge_id, member->port->p_serial);
1398                 }
1399                 /* find minimum delay */
1400                 if (space < member->min_space)
1401                         member->min_space = space;
1402                 /* check if we should reduce buffer */
1403                 if (bridge->sample_count >= 8000*5) {
1404                         /* reduce buffer by minimum delay */
1405 //                      PDEBUG(DEBUG_PORT, "bridge %u member %d has min space of %d samples\n", bridge->bridge_id, member->port->p_serial, member->min_space);
1406                         member->write_p = (member->write_p - member->min_space) & (BRIDGE_BUFFER - 1);
1407                         member->min_space = 1000000; /* infinite */
1408                 }
1409                 member = member->next;
1410         }
1411
1412         /* clear sample data */
1413         read_p = bridge->read_p;
1414         sum = bridge->sum_buffer;
1415         for (i = 0; i < 160; i++) {
1416                 sum[read_p] = 0;
1417                 read_p = (read_p + 1) & (BRIDGE_BUFFER - 1);
1418         }
1419
1420         /* raise read pointer */
1421         bridge->read_p = read_p;
1422
1423         if (bridge->sample_count >= 8000*5)
1424                 bridge->sample_count = 0;
1425
1426         return 0;
1427 }
1428
1429
1430 /* receive data from remote Port (dummy, needs to be inherited) */
1431 int Port::bridge_rx(unsigned char *data, int len)
1432 {
1433         return 0; /* datenklo */
1434 }
1435