sjero.net Git - linphone/blob - coreapi/linphonecall.c

   1
   2 /*
   3 linphone
   4 Copyright (C) 2010  Belledonne Communications SARL
   5  (simon.morlat@linphone.org)
   6
   7 This program is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public License
   9 as published by the Free Software Foundation; either version 2
  10 of the License, or (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 */
  21 #ifdef WIN32
  22 #include <time.h>
  23 #endif
  24 #include "linphonecore.h"
  25 #include "sipsetup.h"
  26 #include "lpconfig.h"
  27 #include "private.h"
  28 #include <ortp/event.h>
  29 #include <ortp/b64.h>
  30
  31
  32 #include "mediastreamer2/mediastream.h"
  33 #include "mediastreamer2/msvolume.h"
  34 #include "mediastreamer2/msequalizer.h"
  35 #include "mediastreamer2/msfileplayer.h"
  36 #include "mediastreamer2/msjpegwriter.h"
  37 #include "mediastreamer2/mseventqueue.h"
  38
  39 #ifdef VIDEO_ENABLED
  40 static MSWebCam *get_nowebcam_device(){
  41         return ms_web_cam_manager_get_cam(ms_web_cam_manager_get(),"StaticImage: Static picture");
  42 }
  43 #endif
  44
  45 static bool_t generate_b64_crypto_key(int key_length, char* key_out) {
  46         int b64_size;
  47         uint8_t* tmp = (uint8_t*) malloc(key_length);
  48         if (ortp_crypto_get_random(tmp, key_length)!=0) {
  49                 ms_error("Failed to generate random key");
  50                 free(tmp);
  51                 return FALSE;
  52         }
  53
  54         b64_size = b64_encode((const char*)tmp, key_length, NULL, 0);
  55         if (b64_size == 0) {
  56                 ms_error("Failed to b64 encode key");
  57                 free(tmp);
  58                 return FALSE;
  59         }
  60         key_out[b64_size] = '\0';
  61         b64_encode((const char*)tmp, key_length, key_out, 40);
  62         free(tmp);
  63         return TRUE;
  64 }
  65
  66 LinphoneCore *linphone_call_get_core(const LinphoneCall *call){
  67         return call->core;
  68 }
  69
  70 const char* linphone_call_get_authentication_token(LinphoneCall *call){
  71         return call->auth_token;
  72 }
  73
  74 bool_t linphone_call_get_authentication_token_verified(LinphoneCall *call){
  75         return call->auth_token_verified;
  76 }
  77
  78 static bool_t linphone_call_are_all_streams_encrypted(LinphoneCall *call) {
  79         // Check ZRTP encryption in audiostream
  80         if (!call->audiostream_encrypted) {
  81                 return FALSE;
  82         }
  83
  84 #ifdef VIDEO_ENABLED
  85         // If video enabled, check ZRTP encryption in videostream
  86         const LinphoneCallParams *params=linphone_call_get_current_params(call);
  87         if (params->has_video && !call->videostream_encrypted) {
  88                 return FALSE;
  89         }
  90 #endif
  91
  92         return TRUE;
  93 }
  94
  95 void propagate_encryption_changed(LinphoneCall *call){
  96         LinphoneCore *lc=call->core;
  97         if (!linphone_call_are_all_streams_encrypted(call)) {
  98                 ms_message("Some streams are not encrypted");
  99                 call->current_params.media_encryption=LinphoneMediaEncryptionNone;
 100                 if (lc->vtable.call_encryption_changed)
 101                         lc->vtable.call_encryption_changed(call->core, call, FALSE, call->auth_token);
 102         } else {
 103                 ms_message("All streams are encrypted");
 104                 call->current_params.media_encryption=LinphoneMediaEncryptionZRTP;
 105                 if (lc->vtable.call_encryption_changed)
 106                         lc->vtable.call_encryption_changed(call->core, call, TRUE, call->auth_token);
 107         }
 108 }
 109
 110 #ifdef VIDEO_ENABLED
 111 static void linphone_call_videostream_encryption_changed(void *data, bool_t encrypted){
 112         ms_message("Video stream is %s", encrypted ? "encrypted" : "not encrypted");
 113
 114         LinphoneCall *call = (LinphoneCall *)data;
 115         call->videostream_encrypted=encrypted;
 116         propagate_encryption_changed(call);
 117 }
 118 #endif
 119
 120 static void linphone_call_audiostream_encryption_changed(void *data, bool_t encrypted) {
 121         char status[255]={0};
 122         ms_message("Audio stream is %s ", encrypted ? "encrypted" : "not encrypted");
 123
 124         LinphoneCall *call = (LinphoneCall *)data;
 125         call->audiostream_encrypted=encrypted;
 126
 127         if (encrypted && call->core->vtable.display_status != NULL) {
 128                 snprintf(status,sizeof(status)-1,_("Authentication token is %s"),call->auth_token);
 129                  call->core->vtable.display_status(call->core, status);
 130         }
 131
 132         propagate_encryption_changed(call);
 133
 134
 135 #ifdef VIDEO_ENABLED
 136         // Enable video encryption
 137         const LinphoneCallParams *params=linphone_call_get_current_params(call);
 138         if (params->has_video) {
 139                 ms_message("Trying to enable encryption on video stream");
 140                 OrtpZrtpParams params;
 141                 params.zid_file=NULL; //unused
 142                 video_stream_enable_zrtp(call->videostream,call->audiostream,&params);
 143         }
 144 #endif
 145 }
 146
 147
 148 static void linphone_call_audiostream_auth_token_ready(void *data, const char* auth_token, bool_t verified) {
 149         LinphoneCall *call=(LinphoneCall *)data;
 150         if (call->auth_token != NULL)
 151                 ms_free(call->auth_token);
 152
 153         call->auth_token=ms_strdup(auth_token);
 154         call->auth_token_verified=verified;
 155
 156         ms_message("Authentication token is %s (%s)", auth_token, verified?"verified":"unverified");
 157 }
 158
 159 void linphone_call_set_authentication_token_verified(LinphoneCall *call, bool_t verified){
 160         if (call->audiostream==NULL){
 161                 ms_error("linphone_call_set_authentication_token_verified(): No audio stream");
 162         }
 163         if (call->audiostream->ortpZrtpContext==NULL){
 164                 ms_error("linphone_call_set_authentication_token_verified(): No zrtp context.");
 165         }
 166         if (!call->auth_token_verified && verified){
 167                 ortp_zrtp_sas_verified(call->audiostream->ortpZrtpContext);
 168         }else if (call->auth_token_verified && !verified){
 169                 ortp_zrtp_sas_reset_verified(call->audiostream->ortpZrtpContext);
 170         }
 171         call->auth_token_verified=verified;
 172         propagate_encryption_changed(call);
 173 }
 174
 175 static MSList *make_codec_list(LinphoneCore *lc, const MSList *codecs, int bandwidth_limit){
 176         MSList *l=NULL;
 177         const MSList *it;
 178         for(it=codecs;it!=NULL;it=it->next){
 179                 PayloadType *pt=(PayloadType*)it->data;
 180                 if (pt->flags & PAYLOAD_TYPE_ENABLED){
 181                         if (bandwidth_limit>0 && !linphone_core_is_payload_type_usable_for_bandwidth(lc,pt,bandwidth_limit)){
 182                                 ms_message("Codec %s/%i eliminated because of audio bandwidth constraint.",pt->mime_type,pt->clock_rate);
 183                                 continue;
 184                         }
 185                         if (linphone_core_check_payload_type_usability(lc,pt)){
 186                                 l=ms_list_append(l,payload_type_clone(pt));
 187                         }
 188                 }
 189         }
 190         return l;
 191 }
 192
 193 static SalMediaDescription *_create_local_media_description(LinphoneCore *lc, LinphoneCall *call, unsigned int session_id, unsigned int session_ver){
 194         MSList *l;
 195         PayloadType *pt;
 196         int i;
 197         const char *me=linphone_core_get_identity(lc);
 198         LinphoneAddress *addr=linphone_address_new(me);
 199         const char *username=linphone_address_get_username (addr);
 200         SalMediaDescription *md=sal_media_description_new();
 201
 202         md->session_id=session_id;
 203         md->session_ver=session_ver;
 204         md->nstreams=1;
 205         strncpy(md->addr,call->localip,sizeof(md->addr));
 206         strncpy(md->username,username,sizeof(md->username));
 207         md->bandwidth=linphone_core_get_download_bandwidth(lc);
 208
 209         /*set audio capabilities */
 210         strncpy(md->streams[0].addr,call->localip,sizeof(md->streams[0].addr));
 211         md->streams[0].port=call->audio_port;
 212         md->streams[0].proto=(call->params.media_encryption == LinphoneMediaEncryptionSRTP) ?
 213                 SalProtoRtpSavp : SalProtoRtpAvp;
 214         md->streams[0].type=SalAudio;
 215         md->streams[0].ptime=lc->net_conf.down_ptime;
 216         l=make_codec_list(lc,lc->codecs_conf.audio_codecs,call->params.audio_bw);
 217         pt=payload_type_clone(rtp_profile_get_payload_from_mime(&av_profile,"telephone-event"));
 218         l=ms_list_append(l,pt);
 219         md->streams[0].payloads=l;
 220
 221
 222         if (call->params.has_video){
 223                 md->nstreams++;
 224                 md->streams[1].port=call->video_port;
 225                 md->streams[1].proto=md->streams[0].proto;
 226                 md->streams[1].type=SalVideo;
 227                 l=make_codec_list(lc,lc->codecs_conf.video_codecs,0);
 228                 md->streams[1].payloads=l;
 229         }
 230
 231         for(i=0; i<md->nstreams; i++) {
 232                 if (md->streams[i].proto == SalProtoRtpSavp) {
 233                         md->streams[i].crypto[0].tag = 1;
 234                         md->streams[i].crypto[0].algo = AES_128_SHA1_80;
 235                         if (!generate_b64_crypto_key(30, md->streams[i].crypto[0].master_key))
 236                                 md->streams[i].crypto[0].algo = 0;
 237                         md->streams[i].crypto[1].tag = 2;
 238                         md->streams[i].crypto[1].algo = AES_128_SHA1_32;
 239                         if (!generate_b64_crypto_key(30, md->streams[i].crypto[1].master_key))
 240                                 md->streams[i].crypto[1].algo = 0;
 241                         md->streams[i].crypto[2].algo = 0;
 242                 }
 243         }
 244
 245         linphone_address_destroy(addr);
 246         return md;
 247 }
 248
 249 void update_local_media_description(LinphoneCore *lc, LinphoneCall *call){
 250         SalMediaDescription *md=call->localdesc;
 251         if (md== NULL) {
 252                 call->localdesc = create_local_media_description(lc,call);
 253         } else {
 254                 call->localdesc = _create_local_media_description(lc,call,md->session_id,md->session_ver+1);
 255                 sal_media_description_unref(md);
 256         }
 257 }
 258
 259 SalMediaDescription *create_local_media_description(LinphoneCore *lc, LinphoneCall *call){
 260         unsigned int id=rand() & 0xfff;
 261         return _create_local_media_description(lc,call,id,id);
 262 }
 263
 264 static int find_port_offset(LinphoneCore *lc){
 265         int offset;
 266         MSList *elem;
 267         int audio_port;
 268         bool_t already_used=FALSE;
 269         for(offset=0;offset<100;offset+=2){
 270                 audio_port=linphone_core_get_audio_port (lc)+offset;
 271                 already_used=FALSE;
 272                 for(elem=lc->calls;elem!=NULL;elem=elem->next){
 273                         LinphoneCall *call=(LinphoneCall*)elem->data;
 274                         if (call->audio_port==audio_port) {
 275                                 already_used=TRUE;
 276                                 break;
 277                         }
 278                 }
 279                 if (!already_used) break;
 280         }
 281         if (offset==100){
 282                 ms_error("Could not find any free port !");
 283                 return -1;
 284         }
 285         return offset;
 286 }
 287
 288 static void linphone_call_init_common(LinphoneCall *call, LinphoneAddress *from, LinphoneAddress *to){
 289         int port_offset;
 290         call->magic=linphone_call_magic;
 291         call->refcnt=1;
 292         call->state=LinphoneCallIdle;
 293         call->start_time=time(NULL);
 294         call->media_start_time=0;
 295         call->log=linphone_call_log_new(call, from, to);
 296         call->owns_call_log=TRUE;
 297         linphone_core_notify_all_friends(call->core,LinphoneStatusOnThePhone);
 298         port_offset=find_port_offset (call->core);
 299         if (port_offset==-1) return;
 300         call->audio_port=linphone_core_get_audio_port(call->core)+port_offset;
 301         call->video_port=linphone_core_get_video_port(call->core)+port_offset;
 302
 303 }
 304
 305 static void discover_mtu(LinphoneCore *lc, const char *remote){
 306         int mtu;
 307         if (lc->net_conf.mtu==0 ){
 308                 /*attempt to discover mtu*/
 309                 mtu=ms_discover_mtu(remote);
 310                 if (mtu>0){
 311                         ms_set_mtu(mtu);
 312                         ms_message("Discovered mtu is %i, RTP payload max size is %i",
 313                                 mtu, ms_get_payload_max_size());
 314                 }
 315         }
 316 }
 317
 318 LinphoneCall * linphone_call_new_outgoing(struct _LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, const LinphoneCallParams *params)
 319 {
 320         LinphoneCall *call=ms_new0(LinphoneCall,1);
 321         call->dir=LinphoneCallOutgoing;
 322         call->op=sal_op_new(lc->sal);
 323         sal_op_set_user_pointer(call->op,call);
 324         call->core=lc;
 325         linphone_core_get_local_ip(lc,linphone_address_get_domain(to),call->localip);
 326         linphone_call_init_common(call,from,to);
 327         call->params=*params;
 328         call->localdesc=create_local_media_description (lc,call);
 329         call->camera_active=params->has_video;
 330         if (linphone_core_get_firewall_policy(call->core)==LinphonePolicyUseStun)
 331                 linphone_core_run_stun_tests(call->core,call);
 332         discover_mtu(lc,linphone_address_get_domain (to));
 333         if (params->referer){
 334                 sal_call_set_referer(call->op,params->referer->op);
 335                 call->referer=linphone_call_ref(params->referer);
 336         }
 337         return call;
 338 }
 339
 340 LinphoneCall * linphone_call_new_incoming(LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, SalOp *op){
 341         LinphoneCall *call=ms_new0(LinphoneCall,1);
 342         char *from_str;
 343
 344         call->dir=LinphoneCallIncoming;
 345         sal_op_set_user_pointer(op,call);
 346         call->op=op;
 347         call->core=lc;
 348
 349         if (lc->sip_conf.ping_with_options){
 350                 /*the following sends an option request back to the caller so that
 351                  we get a chance to discover our nat'd address before answering.*/
 352                 call->ping_op=sal_op_new(lc->sal);
 353                 from_str=linphone_address_as_string_uri_only(from);
 354                 sal_op_set_route(call->ping_op,sal_op_get_network_origin(op));
 355                 sal_op_set_user_pointer(call->ping_op,call);
 356                 sal_ping(call->ping_op,linphone_core_find_best_identity(lc,from,NULL),from_str);
 357                 ms_free(from_str);
 358         }
 359
 360         linphone_address_clean(from);
 361         linphone_core_get_local_ip(lc,linphone_address_get_domain(from),call->localip);
 362         linphone_call_init_common(call, from, to);
 363         linphone_core_init_default_params(lc, &call->params);
 364         call->params.has_video &= !!lc->video_policy.automatically_accept;
 365         call->localdesc=create_local_media_description (lc,call);
 366         call->camera_active=call->params.has_video;
 367         if (linphone_core_get_firewall_policy(call->core)==LinphonePolicyUseStun)
 368                 linphone_core_run_stun_tests(call->core,call);
 369         discover_mtu(lc,linphone_address_get_domain(from));
 370         return call;
 371 }
 372
 373 /* this function is called internally to get rid of a call.
 374  It performs the following tasks:
 375  - remove the call from the internal list of calls
 376  - update the call logs accordingly
 377 */
 378
 379 static void linphone_call_set_terminated(LinphoneCall *call){
 380         LinphoneCore *lc=call->core;
 381
 382         linphone_core_update_allocated_audio_bandwidth(lc);
 383
 384         call->owns_call_log=FALSE;
 385         linphone_call_log_completed(call);
 386
 387
 388         if (call == lc->current_call){
 389                 ms_message("Resetting the current call");
 390                 lc->current_call=NULL;
 391         }
 392
 393         if (linphone_core_del_call(lc,call) != 0){
 394                 ms_error("Could not remove the call from the list !!!");
 395         }
 396
 397         if (ms_list_size(lc->calls)==0)
 398                 linphone_core_notify_all_friends(lc,lc->presence_mode);
 399
 400         linphone_core_conference_check_uninit(lc);
 401         if (call->ringing_beep){
 402                 linphone_core_stop_dtmf(lc);
 403                 call->ringing_beep=FALSE;
 404         }
 405         if (call->referer){
 406                 linphone_call_unref(call->referer);
 407                 call->referer=NULL;
 408         }
 409 }
 410
 411 void linphone_call_fix_call_parameters(LinphoneCall *call){
 412         call->params.has_video=call->current_params.has_video;
 413         call->params.media_encryption=call->current_params.media_encryption;
 414 }
 415
 416 const char *linphone_call_state_to_string(LinphoneCallState cs){
 417         switch (cs){
 418                 case LinphoneCallIdle:
 419                         return "LinphoneCallIdle";
 420                 case LinphoneCallIncomingReceived:
 421                         return "LinphoneCallIncomingReceived";
 422                 case LinphoneCallOutgoingInit:
 423                         return "LinphoneCallOutgoingInit";
 424                 case LinphoneCallOutgoingProgress:
 425                         return "LinphoneCallOutgoingProgress";
 426                 case LinphoneCallOutgoingRinging:
 427                         return "LinphoneCallOutgoingRinging";
 428                 case LinphoneCallOutgoingEarlyMedia:
 429                         return "LinphoneCallOutgoingEarlyMedia";
 430                 case LinphoneCallConnected:
 431                         return "LinphoneCallConnected";
 432                 case LinphoneCallStreamsRunning:
 433                         return "LinphoneCallStreamsRunning";
 434                 case LinphoneCallPausing:
 435                         return "LinphoneCallPausing";
 436                 case LinphoneCallPaused:
 437                         return "LinphoneCallPaused";
 438                 case LinphoneCallResuming:
 439                         return "LinphoneCallResuming";
 440                 case LinphoneCallRefered:
 441                         return "LinphoneCallRefered";
 442                 case LinphoneCallError:
 443                         return "LinphoneCallError";
 444                 case LinphoneCallEnd:
 445                         return "LinphoneCallEnd";
 446                 case LinphoneCallPausedByRemote:
 447                         return "LinphoneCallPausedByRemote";
 448                 case LinphoneCallUpdatedByRemote:
 449                         return "LinphoneCallUpdatedByRemote";
 450                 case LinphoneCallIncomingEarlyMedia:
 451                         return "LinphoneCallIncomingEarlyMedia";
 452                 case LinphoneCallUpdated:
 453                         return "LinphoneCallUpdated";
 454                 case LinphoneCallReleased:
 455                         return "LinphoneCallReleased";
 456         }
 457         return "undefined state";
 458 }
 459
 460 void linphone_call_set_state(LinphoneCall *call, LinphoneCallState cstate, const char *message){
 461         LinphoneCore *lc=call->core;
 462
 463         if (call->state!=cstate){
 464                 if (call->state==LinphoneCallEnd || call->state==LinphoneCallError){
 465                         if (cstate!=LinphoneCallReleased){
 466                                 ms_warning("Spurious call state change from %s to %s, ignored.",linphone_call_state_to_string(call->state),
 467                                    linphone_call_state_to_string(cstate));
 468                                 return;
 469                         }
 470                 }
 471                 ms_message("Call %p: moving from state %s to %s",call,linphone_call_state_to_string(call->state),
 472                            linphone_call_state_to_string(cstate));
 473                 if (cstate!=LinphoneCallRefered){
 474                         /*LinphoneCallRefered is rather an event, not a state.
 475                          Indeed it does not change the state of the call (still paused or running)*/
 476                         call->state=cstate;
 477                 }
 478                 if (cstate==LinphoneCallEnd || cstate==LinphoneCallError){
 479              if (call->reason==LinphoneReasonDeclined){
 480                                 call->log->status=LinphoneCallDeclined;
 481                         }
 482                         linphone_call_set_terminated (call);
 483                 }
 484                 if (cstate == LinphoneCallConnected) {
 485                         call->log->status=LinphoneCallSuccess;
 486                         call->media_start_time=time(NULL);
 487                 }
 488
 489                 if (lc->vtable.call_state_changed)
 490                         lc->vtable.call_state_changed(lc,call,cstate,message);
 491                 if (cstate==LinphoneCallReleased){
 492                         if (call->op!=NULL) {
 493                                 /* so that we cannot have anymore upcalls for SAL
 494                                  concerning this call*/
 495                                 sal_op_release(call->op);
 496                                 call->op=NULL;
 497                         }
 498                         linphone_call_unref(call);
 499                 }
 500         }
 501 }
 502
 503 static void linphone_call_destroy(LinphoneCall *obj)
 504 {
 505         if (obj->op!=NULL) {
 506                 sal_op_release(obj->op);
 507                 obj->op=NULL;
 508         }
 509         if (obj->resultdesc!=NULL) {
 510                 sal_media_description_unref(obj->resultdesc);
 511                 obj->resultdesc=NULL;
 512         }
 513         if (obj->localdesc!=NULL) {
 514                 sal_media_description_unref(obj->localdesc);
 515                 obj->localdesc=NULL;
 516         }
 517         if (obj->ping_op) {
 518                 sal_op_release(obj->ping_op);
 519         }
 520         if (obj->refer_to){
 521                 ms_free(obj->refer_to);
 522         }
 523         if (obj->owns_call_log)
 524                 linphone_call_log_destroy(obj->log);
 525         if (obj->auth_token) {
 526                 ms_free(obj->auth_token);
 527         }
 528
 529         ms_free(obj);
 530 }
 531
 532 /**
 533  * @addtogroup call_control
 534  * @{
 535 **/
 536
 537 /**
 538  * Increments the call 's reference count.
 539  * An application that wishes to retain a pointer to call object
 540  * must use this function to unsure the pointer remains
 541  * valid. Once the application no more needs this pointer,
 542  * it must call linphone_call_unref().
 543 **/
 544 LinphoneCall * linphone_call_ref(LinphoneCall *obj){
 545         obj->refcnt++;
 546         return obj;
 547 }
 548
 549 /**
 550  * Decrements the call object reference count.
 551  * See linphone_call_ref().
 552 **/
 553 void linphone_call_unref(LinphoneCall *obj){
 554         obj->refcnt--;
 555         if (obj->refcnt==0){
 556                 linphone_call_destroy(obj);
 557         }
 558 }
 559
 560 /**
 561  * Returns current parameters associated to the call.
 562 **/
 563 const LinphoneCallParams * linphone_call_get_current_params(const LinphoneCall *call){
 564         return &call->current_params;
 565 }
 566
 567 static bool_t is_video_active(const SalStreamDescription *sd){
 568         return sd->port!=0 && sd->dir!=SalStreamInactive;
 569 }
 570
 571 /**
 572  * Returns call parameters proposed by remote.
 573  *
 574  * This is useful when receiving an incoming call, to know whether the remote party
 575  * supports video, encryption or whatever.
 576 **/
 577 const LinphoneCallParams * linphone_call_get_remote_params(LinphoneCall *call){
 578         LinphoneCallParams *cp=&call->remote_params;
 579         memset(cp,0,sizeof(*cp));
 580         if (call->op){
 581                 SalMediaDescription *md=sal_call_get_remote_media_description(call->op);
 582                 if (md){
 583                         SalStreamDescription *asd,*vsd,*secure_asd,*secure_vsd;
 584
 585                         asd=sal_media_description_find_stream(md,SalProtoRtpAvp,SalAudio);
 586                         vsd=sal_media_description_find_stream(md,SalProtoRtpAvp,SalVideo);
 587                         secure_asd=sal_media_description_find_stream(md,SalProtoRtpSavp,SalAudio);
 588                         secure_vsd=sal_media_description_find_stream(md,SalProtoRtpSavp,SalVideo);
 589                         if (secure_vsd){
 590                                 cp->has_video=is_video_active(secure_vsd);
 591                                 if (secure_asd || asd==NULL)
 592                                         cp->media_encryption=LinphoneMediaEncryptionSRTP;
 593                         }else if (vsd){
 594                                 cp->has_video=is_video_active(vsd);
 595                         }
 596                         return cp;
 597                 }
 598         }
 599         return NULL;
 600 }
 601
 602 /**
 603  * Returns the remote address associated to this call
 604  *
 605 **/
 606 const LinphoneAddress * linphone_call_get_remote_address(const LinphoneCall *call){
 607         return call->dir==LinphoneCallIncoming ? call->log->from : call->log->to;
 608 }
 609
 610 /**
 611  * Returns the remote address associated to this call as a string.
 612  *
 613  * The result string must be freed by user using ms_free().
 614 **/
 615 char *linphone_call_get_remote_address_as_string(const LinphoneCall *call){
 616         return linphone_address_as_string(linphone_call_get_remote_address(call));
 617 }
 618
 619 /**
 620  * Retrieves the call's current state.
 621 **/
 622 LinphoneCallState linphone_call_get_state(const LinphoneCall *call){
 623         return call->state;
 624 }
 625
 626 /**
 627  * Returns the reason for a call termination (either error or normal termination)
 628 **/
 629 LinphoneReason linphone_call_get_reason(const LinphoneCall *call){
 630         return call->reason;
 631 }
 632
 633 /**
 634  * Get the user_pointer in the LinphoneCall
 635  *
 636  * @ingroup call_control
 637  *
 638  * return user_pointer an opaque user pointer that can be retrieved at any time
 639 **/
 640 void *linphone_call_get_user_pointer(LinphoneCall *call)
 641 {
 642         return call->user_pointer;
 643 }
 644
 645 /**
 646  * Set the user_pointer in the LinphoneCall
 647  *
 648  * @ingroup call_control
 649  *
 650  * the user_pointer is an opaque user pointer that can be retrieved at any time in the LinphoneCall
 651 **/
 652 void linphone_call_set_user_pointer(LinphoneCall *call, void *user_pointer)
 653 {
 654         call->user_pointer = user_pointer;
 655 }
 656
 657 /**
 658  * Returns the call log associated to this call.
 659 **/
 660 LinphoneCallLog *linphone_call_get_call_log(const LinphoneCall *call){
 661         return call->log;
 662 }
 663
 664 /**
 665  * Returns the refer-to uri (if the call was transfered).
 666 **/
 667 const char *linphone_call_get_refer_to(const LinphoneCall *call){
 668         return call->refer_to;
 669 }
 670
 671 /**
 672  * Returns direction of the call (incoming or outgoing).
 673 **/
 674 LinphoneCallDir linphone_call_get_dir(const LinphoneCall *call){
 675         return call->log->dir;
 676 }
 677
 678 /**
 679  * Returns the far end's user agent description string, if available.
 680 **/
 681 const char *linphone_call_get_remote_user_agent(LinphoneCall *call){
 682         if (call->op){
 683                 return sal_op_get_remote_ua (call->op);
 684         }
 685         return NULL;
 686 }
 687
 688 /**
 689  * Returns true if this calls has received a transfer that has not been
 690  * executed yet.
 691  * Pending transfers are executed when this call is being paused or closed,
 692  * locally or by remote endpoint.
 693  * If the call is already paused while receiving the transfer request, the
 694  * transfer immediately occurs.
 695 **/
 696 bool_t linphone_call_has_transfer_pending(const LinphoneCall *call){
 697         return call->refer_pending;
 698 }
 699
 700 /**
 701  * Returns call's duration in seconds.
 702 **/
 703 int linphone_call_get_duration(const LinphoneCall *call){
 704         if (call->media_start_time==0) return 0;
 705         return time(NULL)-call->media_start_time;
 706 }
 707
 708 /**
 709  * Returns the call object this call is replacing, if any.
 710  * Call replacement can occur during call transfers.
 711  * By default, the core automatically terminates the replaced call and accept the new one.
 712  * This function allows the application to know whether a new incoming call is a one that replaces another one.
 713 **/
 714 LinphoneCall *linphone_call_get_replaced_call(LinphoneCall *call){
 715         SalOp *op=sal_call_get_replaces(call->op);
 716         if (op){
 717                 return (LinphoneCall*)sal_op_get_user_pointer(op);
 718         }
 719         return NULL;
 720 }
 721
 722 /**
 723  * Indicate whether camera input should be sent to remote end.
 724 **/
 725 void linphone_call_enable_camera (LinphoneCall *call, bool_t enable){
 726 #ifdef VIDEO_ENABLED
 727         if (call->videostream!=NULL && call->videostream->ticker!=NULL){
 728                 LinphoneCore *lc=call->core;
 729                 MSWebCam *nowebcam=get_nowebcam_device();
 730                 if (call->camera_active!=enable && lc->video_conf.device!=nowebcam){
 731                         video_stream_change_camera(call->videostream,
 732                                      enable ? lc->video_conf.device : nowebcam);
 733                 }
 734         }
 735         call->camera_active=enable;
 736 #endif
 737 }
 738
 739 /**
 740  * Take a photo of currently received video and write it into a jpeg file.
 741 **/
 742 int linphone_call_take_video_snapshot(LinphoneCall *call, const char *file){
 743 #ifdef VIDEO_ENABLED
 744         if (call->videostream!=NULL && call->videostream->jpegwriter!=NULL){
 745                 return ms_filter_call_method(call->videostream->jpegwriter,MS_JPEG_WRITER_TAKE_SNAPSHOT,(void*)file);
 746         }
 747         ms_warning("Cannot take snapshot: no currently running video stream on this call.");
 748         return -1;
 749 #endif
 750         return -1;
 751 }
 752
 753 /**
 754  * Returns TRUE if camera pictures are sent to the remote party.
 755 **/
 756 bool_t linphone_call_camera_enabled (const LinphoneCall *call){
 757         return call->camera_active;
 758 }
 759
 760 /**
 761  * Enable video stream.
 762 **/
 763 void linphone_call_params_enable_video(LinphoneCallParams *cp, bool_t enabled){
 764         cp->has_video=enabled;
 765 }
 766
 767 /**
 768  * Returns whether video is enabled.
 769 **/
 770 bool_t linphone_call_params_video_enabled(const LinphoneCallParams *cp){
 771         return cp->has_video;
 772 }
 773
 774 enum LinphoneMediaEncryption linphone_call_params_get_media_encryption(const LinphoneCallParams *cp) {
 775         return cp->media_encryption;
 776 }
 777
 778 void linphone_call_params_set_media_encryption(LinphoneCallParams *cp, enum LinphoneMediaEncryption e) {
 779         cp->media_encryption = e;
 780 }
 781
 782
 783 /**
 784  * Enable sending of real early media (during outgoing calls).
 785 **/
 786 void linphone_call_params_enable_early_media_sending(LinphoneCallParams *cp, bool_t enabled){
 787         cp->real_early_media=enabled;
 788 }
 789
 790 bool_t linphone_call_params_early_media_sending_enabled(const LinphoneCallParams *cp){
 791         return cp->real_early_media;
 792 }
 793
 794 /**
 795  * Returns true if the call is part of the locally managed conference.
 796 **/
 797 bool_t linphone_call_params_local_conference_mode(const LinphoneCallParams *cp){
 798         return cp->in_conference;
 799 }
 800
 801 /**
 802  * Refine bandwidth settings for this call by setting a bandwidth limit for audio streams.
 803  * As a consequence, codecs whose bitrates are not compatible with this limit won't be used.
 804 **/
 805 void linphone_call_params_set_audio_bandwidth_limit(LinphoneCallParams *cp, int bandwidth){
 806         cp->audio_bw=bandwidth;
 807 }
 808
 809 #ifdef VIDEO_ENABLED
 810 /**
 811  * Request remote side to send us a Video Fast Update.
 812 **/
 813 void linphone_call_send_vfu_request(LinphoneCall *call)
 814 {
 815         if (LinphoneCallStreamsRunning == linphone_call_get_state(call))
 816                 sal_call_send_vfu_request(call->op);
 817 }
 818 #endif
 819
 820 /**
 821  *
 822 **/
 823 LinphoneCallParams * linphone_call_params_copy(const LinphoneCallParams *cp){
 824         LinphoneCallParams *ncp=ms_new0(LinphoneCallParams,1);
 825         memcpy(ncp,cp,sizeof(LinphoneCallParams));
 826         return ncp;
 827 }
 828
 829 /**
 830  *
 831 **/
 832 void linphone_call_params_destroy(LinphoneCallParams *p){
 833         ms_free(p);
 834 }
 835
 836 /**
 837  * @}
 838 **/
 839
 840
 841 #ifdef TEST_EXT_RENDERER
 842 static void rendercb(void *data, const MSPicture *local, const MSPicture *remote){
 843         ms_message("rendercb, local buffer=%p, remote buffer=%p",
 844                    local ? local->planes[0] : NULL, remote? remote->planes[0] : NULL);
 845 }
 846 #endif
 847
 848 #ifdef VIDEO_ENABLED
 849 static void video_stream_event_cb(void *user_pointer, const MSFilter *f, const unsigned int event_id, const void *args){
 850     LinphoneCall* call = (LinphoneCall*) user_pointer;
 851         ms_warning("In linphonecall.c: video_stream_event_cb");
 852         switch (event_id) {
 853                 case MS_VIDEO_DECODER_DECODING_ERRORS:
 854                         ms_warning("Case is MS_VIDEO_DECODER_DECODING_ERRORS");
 855                         linphone_call_send_vfu_request(call);
 856                         break;
 857         case MS_VIDEO_DECODER_FIRST_IMAGE_DECODED:
 858             ms_message("First video frame decoded successfully");
 859             if (call->core->vtable.call_first_video_frame != NULL)
 860                 call->core->vtable.call_first_video_frame(call->core, call);
 861             break;
 862                 default:
 863                         ms_warning("Unhandled event %i", event_id);
 864                         break;
 865         }
 866 }
 867 #endif
 868
 869 void linphone_call_init_media_streams(LinphoneCall *call){
 870         LinphoneCore *lc=call->core;
 871         SalMediaDescription *md=call->localdesc;
 872         AudioStream *audiostream;
 873
 874         call->audiostream=audiostream=audio_stream_new(md->streams[0].port,linphone_core_ipv6_enabled(lc));
 875         if (linphone_core_echo_limiter_enabled(lc)){
 876                 const char *type=lp_config_get_string(lc->config,"sound","el_type","mic");
 877                 if (strcasecmp(type,"mic")==0)
 878                         audio_stream_enable_echo_limiter(audiostream,ELControlMic);
 879                 else if (strcasecmp(type,"full")==0)
 880                         audio_stream_enable_echo_limiter(audiostream,ELControlFull);
 881         }
 882         audio_stream_enable_gain_control(audiostream,TRUE);
 883         if (linphone_core_echo_cancellation_enabled(lc)){
 884                 int len,delay,framesize;
 885                 const char *statestr=lp_config_get_string(lc->config,"sound","ec_state",NULL);
 886                 len=lp_config_get_int(lc->config,"sound","ec_tail_len",0);
 887                 delay=lp_config_get_int(lc->config,"sound","ec_delay",0);
 888                 framesize=lp_config_get_int(lc->config,"sound","ec_framesize",0);
 889                 audio_stream_set_echo_canceller_params(audiostream,len,delay,framesize);
 890                 if (statestr && audiostream->ec){
 891                         ms_filter_call_method(audiostream->ec,MS_ECHO_CANCELLER_SET_STATE_STRING,(void*)statestr);
 892                 }
 893         }
 894         audio_stream_enable_automatic_gain_control(audiostream,linphone_core_agc_enabled(lc));
 895         {
 896                 int enabled=lp_config_get_int(lc->config,"sound","noisegate",0);
 897                 audio_stream_enable_noise_gate(audiostream,enabled);
 898         }
 899
 900         if (lc->rtptf){
 901                 RtpTransport *artp=lc->rtptf->audio_rtp_func(lc->rtptf->audio_rtp_func_data, call->audio_port);
 902                 RtpTransport *artcp=lc->rtptf->audio_rtcp_func(lc->rtptf->audio_rtcp_func_data, call->audio_port+1);
 903                 rtp_session_set_transports(audiostream->session,artp,artcp);
 904         }
 905
 906         call->audiostream_app_evq = ortp_ev_queue_new();
 907         rtp_session_register_event_queue(audiostream->session,call->audiostream_app_evq);
 908
 909 #ifdef VIDEO_ENABLED
 910
 911         if ((lc->video_conf.display || lc->video_conf.capture) && md->streams[1].port>0){
 912                 int video_recv_buf_size=lp_config_get_int(lc->config,"video","recv_buf_size",0);
 913                 call->videostream=video_stream_new(md->streams[1].port,linphone_core_ipv6_enabled(lc));
 914                 video_stream_enable_display_filter_auto_rotate(call->videostream, lp_config_get_int(lc->config,"video","display_filter_auto_rotate",0));
 915                 if (video_recv_buf_size>0) rtp_session_set_recv_buf_size(call->videostream->session,video_recv_buf_size);
 916
 917                 if( lc->video_conf.displaytype != NULL)
 918                         video_stream_set_display_filter_name(call->videostream,lc->video_conf.displaytype);
 919                 video_stream_set_event_callback(call->videostream,video_stream_event_cb, call);
 920                 if (lc->rtptf){
 921                         RtpTransport *vrtp=lc->rtptf->video_rtp_func(lc->rtptf->video_rtp_func_data, call->video_port);
 922                         RtpTransport *vrtcp=lc->rtptf->video_rtcp_func(lc->rtptf->video_rtcp_func_data, call->video_port+1);
 923                         rtp_session_set_transports(call->videostream->session,vrtp,vrtcp);
 924                 }
 925                 call->videostream_app_evq = ortp_ev_queue_new();
 926                 rtp_session_register_event_queue(call->videostream->session,call->videostream_app_evq);
 927 #ifdef TEST_EXT_RENDERER
 928                 video_stream_set_render_callback(call->videostream,rendercb,NULL);
 929 #endif
 930         }
 931 #else
 932         call->videostream=NULL;
 933 #endif
 934 }
 935
 936
 937 static int dtmf_tab[16]={'0','1','2','3','4','5','6','7','8','9','*','#','A','B','C','D'};
 938
 939 static void linphone_core_dtmf_received(RtpSession* s, int dtmf, void* user_data){
 940         LinphoneCore* lc = (LinphoneCore*)user_data;
 941         if (dtmf<0 || dtmf>15){
 942                 ms_warning("Bad dtmf value %i",dtmf);
 943                 return;
 944         }
 945         if (lc->vtable.dtmf_received != NULL)
 946                 lc->vtable.dtmf_received(lc, linphone_core_get_current_call(lc), dtmf_tab[dtmf]);
 947 }
 948
 949 static void parametrize_equalizer(LinphoneCore *lc, AudioStream *st){
 950         if (st->equalizer){
 951                 MSFilter *f=st->equalizer;
 952                 int enabled=lp_config_get_int(lc->config,"sound","eq_active",0);
 953                 const char *gains=lp_config_get_string(lc->config,"sound","eq_gains",NULL);
 954                 ms_filter_call_method(f,MS_EQUALIZER_SET_ACTIVE,&enabled);
 955                 if (enabled){
 956                         if (gains){
 957                                 do{
 958                                         int bytes;
 959                                         MSEqualizerGain g;
 960                                         if (sscanf(gains,"%f:%f:%f %n",&g.frequency,&g.gain,&g.width,&bytes)==3){
 961                                                 ms_message("Read equalizer gains: %f(~%f) --> %f",g.frequency,g.width,g.gain);
 962                                                 ms_filter_call_method(f,MS_EQUALIZER_SET_GAIN,&g);
 963                                                 gains+=bytes;
 964                                         }else break;
 965                                 }while(1);
 966                         }
 967                 }
 968         }
 969 }
 970
 971 void _post_configure_audio_stream(AudioStream *st, LinphoneCore *lc, bool_t muted){
 972         float mic_gain=lp_config_get_float(lc->config,"sound","mic_gain",1);
 973         float thres = 0;
 974         float recv_gain;
 975         float ng_thres=lp_config_get_float(lc->config,"sound","ng_thres",0.05);
 976         float ng_floorgain=lp_config_get_float(lc->config,"sound","ng_floorgain",0);
 977         int dc_removal=lp_config_get_int(lc->config,"sound","dc_removal",0);
 978
 979         if (!muted)
 980                 audio_stream_set_mic_gain(st,mic_gain);
 981         else
 982                 audio_stream_set_mic_gain(st,0);
 983
 984         recv_gain = lc->sound_conf.soft_play_lev;
 985         if (recv_gain != 0) {
 986                 linphone_core_set_playback_gain_db (lc,recv_gain);
 987         }
 988
 989         if (st->volsend){
 990                 ms_filter_call_method(st->volsend,MS_VOLUME_REMOVE_DC,&dc_removal);
 991                 float speed=lp_config_get_float(lc->config,"sound","el_speed",-1);
 992                 thres=lp_config_get_float(lc->config,"sound","el_thres",-1);
 993                 float force=lp_config_get_float(lc->config,"sound","el_force",-1);
 994                 int sustain=lp_config_get_int(lc->config,"sound","el_sustain",-1);
 995                 float transmit_thres=lp_config_get_float(lc->config,"sound","el_transmit_thres",-1);
 996                 MSFilter *f=NULL;
 997                 f=st->volsend;
 998                 if (speed==-1) speed=0.03;
 999                 if (force==-1) force=25;
1000                 ms_filter_call_method(f,MS_VOLUME_SET_EA_SPEED,&speed);
1001                 ms_filter_call_method(f,MS_VOLUME_SET_EA_FORCE,&force);
1002                 if (thres!=-1)
1003                         ms_filter_call_method(f,MS_VOLUME_SET_EA_THRESHOLD,&thres);
1004                 if (sustain!=-1)
1005                         ms_filter_call_method(f,MS_VOLUME_SET_EA_SUSTAIN,&sustain);
1006                 if (transmit_thres!=-1)
1007                                 ms_filter_call_method(f,MS_VOLUME_SET_EA_TRANSMIT_THRESHOLD,&transmit_thres);
1008
1009                 ms_filter_call_method(st->volsend,MS_VOLUME_SET_NOISE_GATE_THRESHOLD,&ng_thres);
1010                 ms_filter_call_method(st->volsend,MS_VOLUME_SET_NOISE_GATE_FLOORGAIN,&ng_floorgain);
1011         }
1012         if (st->volrecv){
1013                 /* parameters for a limited noise-gate effect, using echo limiter threshold */
1014                 float floorgain = 1/mic_gain;
1015                 int spk_agc=lp_config_get_int(lc->config,"sound","speaker_agc_enabled",0);
1016                 ms_filter_call_method(st->volrecv, MS_VOLUME_ENABLE_AGC, &spk_agc);
1017                 ms_filter_call_method(st->volrecv,MS_VOLUME_SET_NOISE_GATE_THRESHOLD,&ng_thres);
1018                 ms_filter_call_method(st->volrecv,MS_VOLUME_SET_NOISE_GATE_FLOORGAIN,&floorgain);
1019         }
1020         parametrize_equalizer(lc,st);
1021 }
1022
1023 static void post_configure_audio_streams(LinphoneCall*call){
1024         AudioStream *st=call->audiostream;
1025         LinphoneCore *lc=call->core;
1026         _post_configure_audio_stream(st,lc,call->audio_muted);
1027         if (lc->vtable.dtmf_received!=NULL){
1028                 /* replace by our default action*/
1029                 audio_stream_play_received_dtmfs(call->audiostream,FALSE);
1030                 rtp_session_signal_connect(call->audiostream->session,"telephone-event",(RtpCallback)linphone_core_dtmf_received,(unsigned long)lc);
1031         }
1032 }
1033
1034 static RtpProfile *make_profile(LinphoneCall *call, const SalMediaDescription *md, const SalStreamDescription *desc, int *used_pt){
1035         int bw;
1036         const MSList *elem;
1037         RtpProfile *prof=rtp_profile_new("Call profile");
1038         bool_t first=TRUE;
1039         int remote_bw=0;
1040         LinphoneCore *lc=call->core;
1041         int up_ptime=0;
1042         *used_pt=-1;
1043
1044         for(elem=desc->payloads;elem!=NULL;elem=elem->next){
1045                 PayloadType *pt=(PayloadType*)elem->data;
1046                 int number;
1047
1048                 if ((pt->flags & PAYLOAD_TYPE_FLAG_CAN_SEND) && first) {
1049                         if (desc->type==SalAudio){
1050                                 linphone_core_update_allocated_audio_bandwidth_in_call(call,pt);
1051                                 up_ptime=linphone_core_get_upload_ptime(lc);
1052                         }
1053                         *used_pt=payload_type_get_number(pt);
1054                         first=FALSE;
1055                 }
1056                 if (desc->bandwidth>0) remote_bw=desc->bandwidth;
1057                 else if (md->bandwidth>0) {
1058                         /*case where b=AS is given globally, not per stream*/
1059                         remote_bw=md->bandwidth;
1060                         if (desc->type==SalVideo){
1061                                 remote_bw=get_video_bandwidth(remote_bw,call->audio_bw);
1062                         }
1063                 }
1064
1065                 if (desc->type==SalAudio){
1066                                 bw=get_min_bandwidth(call->audio_bw,remote_bw);
1067                 }else bw=get_min_bandwidth(get_video_bandwidth(linphone_core_get_upload_bandwidth (lc),call->audio_bw),remote_bw);
1068                 if (bw>0) pt->normal_bitrate=bw*1000;
1069                 else if (desc->type==SalAudio){
1070                         pt->normal_bitrate=-1;
1071                 }
1072                 if (desc->ptime>0){
1073                         up_ptime=desc->ptime;
1074                 }
1075                 if (up_ptime>0){
1076                         char tmp[40];
1077                         snprintf(tmp,sizeof(tmp),"ptime=%i",up_ptime);
1078                         payload_type_append_send_fmtp(pt,tmp);
1079                 }
1080                 number=payload_type_get_number(pt);
1081                 if (rtp_profile_get_payload(prof,number)!=NULL){
1082                         ms_warning("A payload type with number %i already exists in profile !",number);
1083                 }else
1084                         rtp_profile_set_payload(prof,number,pt);
1085         }
1086         return prof;
1087 }
1088
1089
1090 static void setup_ring_player(LinphoneCore *lc, LinphoneCall *call){
1091         int pause_time=3000;
1092         audio_stream_play(call->audiostream,lc->sound_conf.ringback_tone);
1093         ms_filter_call_method(call->audiostream->soundread,MS_FILE_PLAYER_LOOP,&pause_time);
1094 }
1095
1096 #define LINPHONE_RTCP_SDES_TOOL "Linphone-" LINPHONE_VERSION
1097
1098 static bool_t linphone_call_sound_resources_available(LinphoneCall *call){
1099         LinphoneCore *lc=call->core;
1100         LinphoneCall *current=linphone_core_get_current_call(lc);
1101         return !linphone_core_is_in_conference(lc) &&
1102                 (current==NULL || current==call);
1103 }
1104 static int find_crypto_index_from_tag(const SalSrtpCryptoAlgo crypto[],unsigned char tag) {
1105     int i;
1106     for(i=0; i<SAL_CRYPTO_ALGO_MAX; i++) {
1107         if (crypto[i].tag == tag) {
1108             return i;
1109         }
1110     }
1111     return -1;
1112 }
1113 static void linphone_call_start_audio_stream(LinphoneCall *call, const char *cname, bool_t muted, bool_t send_ringbacktone, bool_t use_arc){
1114         LinphoneCore *lc=call->core;
1115         int jitt_comp=lc->rtp_conf.audio_jitt_comp;
1116         int used_pt=-1;
1117         /* look for savp stream first */
1118         const SalStreamDescription *stream=sal_media_description_find_stream(call->resultdesc,
1119                                                 SalProtoRtpSavp,SalAudio);
1120         /* no savp audio stream, use avp */
1121         if (!stream)
1122                 stream=sal_media_description_find_stream(call->resultdesc,
1123                                                 SalProtoRtpAvp,SalAudio);
1124
1125         if (stream && stream->dir!=SalStreamInactive && stream->port!=0){
1126                 MSSndCard *playcard=lc->sound_conf.lsd_card ?
1127                         lc->sound_conf.lsd_card : lc->sound_conf.play_sndcard;
1128                 MSSndCard *captcard=lc->sound_conf.capt_sndcard;
1129                 const char *playfile=lc->play_file;
1130                 const char *recfile=lc->rec_file;
1131                 call->audio_profile=make_profile(call,call->resultdesc,stream,&used_pt);
1132                 bool_t use_ec;
1133
1134                 if (used_pt!=-1){
1135                         if (playcard==NULL) {
1136                                 ms_warning("No card defined for playback !");
1137                         }
1138                         if (captcard==NULL) {
1139                                 ms_warning("No card defined for capture !");
1140                         }
1141                         /*Replace soundcard filters by inactive file players or recorders
1142                          when placed in recvonly or sendonly mode*/
1143                         if (stream->port==0 || stream->dir==SalStreamRecvOnly){
1144                                 captcard=NULL;
1145                                 playfile=NULL;
1146                         }else if (stream->dir==SalStreamSendOnly){
1147                                 playcard=NULL;
1148                                 captcard=NULL;
1149                                 recfile=NULL;
1150                                 /*And we will eventually play "playfile" if set by the user*/
1151                                 /*playfile=NULL;*/
1152                         }
1153                         if (send_ringbacktone){
1154                                 captcard=NULL;
1155                                 playfile=NULL;/* it is setup later*/
1156                         }
1157                         /*if playfile are supplied don't use soundcards*/
1158                         if (lc->use_files) {
1159                                 captcard=NULL;
1160                                 playcard=NULL;
1161                         }
1162                         if (call->params.in_conference){
1163                                 /* first create the graph without soundcard resources*/
1164                                 captcard=playcard=NULL;
1165                         }
1166                         if (!linphone_call_sound_resources_available(call)){
1167                                 ms_message("Sound resources are used by another call, not using soundcard.");
1168                                 captcard=playcard=NULL;
1169                         }
1170                         use_ec=captcard==NULL ? FALSE : linphone_core_echo_cancellation_enabled(lc);
1171
1172                         audio_stream_enable_adaptive_bitrate_control(call->audiostream,use_arc);
1173                         audio_stream_start_full(
1174                                 call->audiostream,
1175                                 call->audio_profile,
1176                                 stream->addr[0]!='\0' ? stream->addr : call->resultdesc->addr,
1177                                 stream->port,
1178                                 linphone_core_rtcp_enabled(lc) ? (stream->port+1) : 0,
1179                                 used_pt,
1180                                 jitt_comp,
1181                                 playfile,
1182                                 recfile,
1183                                 playcard,
1184                                 captcard,
1185                                 use_ec
1186                                 );
1187                         post_configure_audio_streams(call);
1188                         if (muted && !send_ringbacktone){
1189                                 audio_stream_set_mic_gain(call->audiostream,0);
1190                         }
1191                         if (stream->dir==SalStreamSendOnly && playfile!=NULL){
1192                                 int pause_time=500;
1193                                 ms_filter_call_method(call->audiostream->soundread,MS_FILE_PLAYER_LOOP,&pause_time);
1194                         }
1195                         if (send_ringbacktone){
1196                                 setup_ring_player(lc,call);
1197                         }
1198                         audio_stream_set_rtcp_information(call->audiostream, cname, LINPHONE_RTCP_SDES_TOOL);
1199
1200             /* valid local tags are > 0 */
1201                         if (stream->proto == SalProtoRtpSavp) {
1202                 const SalStreamDescription *local_st_desc=sal_media_description_find_stream(call->localdesc,
1203                                                                                             SalProtoRtpSavp,SalAudio);
1204                 int crypto_idx = find_crypto_index_from_tag(local_st_desc->crypto, stream->crypto_local_tag);
1205
1206                 if (crypto_idx >= 0) {
1207                     audio_stream_enable_strp(
1208                                              call->audiostream,
1209                                              stream->crypto[0].algo,
1210                                              local_st_desc->crypto[crypto_idx].master_key,
1211                                              stream->crypto[0].master_key);
1212                     call->audiostream_encrypted=TRUE;
1213                 } else {
1214                     ms_warning("Failed to find local crypto algo with tag: %d", stream->crypto_local_tag);
1215                     call->audiostream_encrypted=FALSE;
1216                 }
1217                         }else call->audiostream_encrypted=FALSE;
1218                         if (call->params.in_conference){
1219                                 /*transform the graph to connect it to the conference filter */
1220                                 bool_t mute=stream->dir==SalStreamRecvOnly;
1221                                 linphone_call_add_to_conf(call, mute);
1222                         }
1223                         call->current_params.in_conference=call->params.in_conference;
1224                 }else ms_warning("No audio stream accepted ?");
1225         }
1226 }
1227
1228 static void linphone_call_start_video_stream(LinphoneCall *call, const char *cname,bool_t all_inputs_muted){
1229 #ifdef VIDEO_ENABLED
1230         LinphoneCore *lc=call->core;
1231         int used_pt=-1;
1232         /* look for savp stream first */
1233         const SalStreamDescription *vstream=sal_media_description_find_stream(call->resultdesc,
1234                                                 SalProtoRtpSavp,SalVideo);
1235         /* no savp audio stream, use avp */
1236         if (!vstream)
1237                 vstream=sal_media_description_find_stream(call->resultdesc,
1238                                                 SalProtoRtpAvp,SalVideo);
1239
1240         /* shutdown preview */
1241         if (lc->previewstream!=NULL) {
1242                 video_preview_stop(lc->previewstream);
1243                 lc->previewstream=NULL;
1244         }
1245
1246         if (vstream!=NULL && vstream->dir!=SalStreamInactive && vstream->port!=0) {
1247                 const char *addr=vstream->addr[0]!='\0' ? vstream->addr : call->resultdesc->addr;
1248                 call->video_profile=make_profile(call,call->resultdesc,vstream,&used_pt);
1249                 if (used_pt!=-1){
1250                         VideoStreamDir dir=VideoStreamSendRecv;
1251                         MSWebCam *cam=lc->video_conf.device;
1252                         bool_t is_inactive=FALSE;
1253
1254                         call->current_params.has_video=TRUE;
1255
1256                         video_stream_enable_adaptive_bitrate_control(call->videostream,
1257                                                                   linphone_core_adaptive_rate_control_enabled(lc));
1258                         video_stream_set_sent_video_size(call->videostream,linphone_core_get_preferred_video_size(lc));
1259                         video_stream_enable_self_view(call->videostream,lc->video_conf.selfview);
1260                         if (lc->video_window_id!=0)
1261                                 video_stream_set_native_window_id(call->videostream,lc->video_window_id);
1262                         if (lc->preview_window_id!=0)
1263                                 video_stream_set_native_preview_window_id (call->videostream,lc->preview_window_id);
1264                         video_stream_use_preview_video_window (call->videostream,lc->use_preview_window);
1265
1266                         if (vstream->dir==SalStreamSendOnly && lc->video_conf.capture ){
1267                                 cam=get_nowebcam_device();
1268                                 dir=VideoStreamSendOnly;
1269                         }else if (vstream->dir==SalStreamRecvOnly && lc->video_conf.display ){
1270                                 dir=VideoStreamRecvOnly;
1271                         }else if (vstream->dir==SalStreamSendRecv){
1272                                 if (lc->video_conf.display && lc->video_conf.capture)
1273                                         dir=VideoStreamSendRecv;
1274                                 else if (lc->video_conf.display)
1275                                         dir=VideoStreamRecvOnly;
1276                                 else
1277                                         dir=VideoStreamSendOnly;
1278                         }else{
1279                                 ms_warning("video stream is inactive.");
1280                                 /*either inactive or incompatible with local capabilities*/
1281                                 is_inactive=TRUE;
1282                         }
1283                         if (call->camera_active==FALSE || all_inputs_muted){
1284                                 cam=get_nowebcam_device();
1285                         }
1286                         if (!is_inactive){
1287                                 video_stream_set_direction (call->videostream, dir);
1288                                 ms_message("%s lc rotation:%d\n", __FUNCTION__, lc->device_rotation);
1289                                 video_stream_set_device_rotation(call->videostream, lc->device_rotation);
1290                                 video_stream_start(call->videostream,
1291                                         call->video_profile, addr, vstream->port,
1292                                         linphone_core_rtcp_enabled(lc) ? (vstream->port+1) : 0,
1293                                         used_pt, lc->rtp_conf.audio_jitt_comp, cam);
1294                                 video_stream_set_rtcp_information(call->videostream, cname,LINPHONE_RTCP_SDES_TOOL);
1295                         }
1296
1297                         if (vstream->proto == SalProtoRtpSavp) {
1298                                 const SalStreamDescription *local_st_desc=sal_media_description_find_stream(call->localdesc,
1299                                                 SalProtoRtpSavp,SalVideo);
1300
1301                                 video_stream_enable_strp(
1302                                         call->videostream,
1303                                         vstream->crypto[0].algo,
1304                                         local_st_desc->crypto[0].master_key,
1305                                         vstream->crypto[0].master_key
1306                                         );
1307                                 call->videostream_encrypted=TRUE;
1308                         }else{
1309                                 call->videostream_encrypted=FALSE;
1310                         }
1311                 }else ms_warning("No video stream accepted.");
1312         }else{
1313                 ms_warning("No valid video stream defined.");
1314         }
1315 #endif
1316 }
1317
1318 void linphone_call_start_media_streams(LinphoneCall *call, bool_t all_inputs_muted, bool_t send_ringbacktone){
1319         LinphoneCore *lc=call->core;
1320         LinphoneAddress *me=linphone_core_get_primary_contact_parsed(lc);
1321         char *cname;
1322         bool_t use_arc=linphone_core_adaptive_rate_control_enabled(lc);
1323 #ifdef VIDEO_ENABLED
1324         const SalStreamDescription *vstream=sal_media_description_find_stream(call->resultdesc,
1325                                                         SalProtoRtpAvp,SalVideo);
1326 #endif
1327
1328         if(call->audiostream == NULL)
1329         {
1330                 ms_fatal("start_media_stream() called without prior init !");
1331                 return;
1332         }
1333         cname=linphone_address_as_string_uri_only(me);
1334
1335 #if defined(VIDEO_ENABLED)
1336         if (vstream!=NULL && vstream->dir!=SalStreamInactive && vstream->payloads!=NULL){
1337                 /*when video is used, do not make adaptive rate control on audio, it is stupid.*/
1338                 use_arc=FALSE;
1339         }
1340 #endif
1341         linphone_call_start_audio_stream(call,cname,all_inputs_muted,send_ringbacktone,use_arc);
1342         call->current_params.has_video=FALSE;
1343         if (call->videostream!=NULL) {
1344                 linphone_call_start_video_stream(call,cname,all_inputs_muted);
1345         call->log->video_enabled = TRUE;
1346         }
1347
1348         call->all_muted=all_inputs_muted;
1349         call->playing_ringbacktone=send_ringbacktone;
1350         call->up_bw=linphone_core_get_upload_bandwidth(lc);
1351
1352         if (call->params.media_encryption==LinphoneMediaEncryptionZRTP) {
1353                 OrtpZrtpParams params;
1354                 /*will be set later when zrtp is activated*/
1355                 call->current_params.media_encryption=LinphoneMediaEncryptionNone;
1356
1357                 params.zid_file=lc->zrtp_secrets_cache;
1358                 audio_stream_enable_zrtp(call->audiostream,&params);
1359         }else if (call->params.media_encryption==LinphoneMediaEncryptionSRTP){
1360                 call->current_params.media_encryption=linphone_call_are_all_streams_encrypted(call) ?
1361                         LinphoneMediaEncryptionSRTP : LinphoneMediaEncryptionNone;
1362         }
1363
1364         /*also reflect the change if the "wished" params, in order to avoid to propose SAVP or video again
1365          * further in the call, for example during pause,resume, conferencing reINVITEs*/
1366         linphone_call_fix_call_parameters(call);
1367
1368         goto end;
1369         end:
1370                 ms_free(cname);
1371                 linphone_address_destroy(me);
1372 }
1373
1374 static void linphone_call_log_fill_stats(LinphoneCallLog *log, AudioStream *st){
1375         audio_stream_get_local_rtp_stats (st,&log->local_stats);
1376         log->quality=audio_stream_get_average_quality_rating(st);
1377 }
1378
1379 void linphone_call_stop_media_streams(LinphoneCall *call){
1380         if (call->audiostream!=NULL) {
1381                 rtp_session_unregister_event_queue(call->audiostream->session,call->audiostream_app_evq);
1382                 ortp_ev_queue_flush(call->audiostream_app_evq);
1383                 ortp_ev_queue_destroy(call->audiostream_app_evq);
1384
1385                 if (call->audiostream->ec){
1386                         const char *state_str=NULL;
1387                         ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_GET_STATE_STRING,&state_str);
1388                         if (state_str){
1389                                 ms_message("Writing echo canceler state, %i bytes",(int)strlen(state_str));
1390                                 lp_config_set_string(call->core->config,"sound","ec_state",state_str);
1391                         }
1392                 }
1393                 linphone_call_log_fill_stats (call->log,call->audiostream);
1394                 if (call->endpoint){
1395                         linphone_call_remove_from_conf(call);
1396                 }
1397                 audio_stream_stop(call->audiostream);
1398                 call->audiostream=NULL;
1399         }
1400
1401
1402 #ifdef VIDEO_ENABLED
1403         if (call->videostream!=NULL){
1404                 rtp_session_unregister_event_queue(call->videostream->session,call->videostream_app_evq);
1405                 ortp_ev_queue_flush(call->videostream_app_evq);
1406                 ortp_ev_queue_destroy(call->videostream_app_evq);
1407                 video_stream_stop(call->videostream);
1408                 call->videostream=NULL;
1409         }
1410 #endif
1411         ms_event_queue_skip(call->core->msevq);
1412
1413         if (call->audio_profile){
1414                 rtp_profile_clear_all(call->audio_profile);
1415                 rtp_profile_destroy(call->audio_profile);
1416                 call->audio_profile=NULL;
1417         }
1418         if (call->video_profile){
1419                 rtp_profile_clear_all(call->video_profile);
1420                 rtp_profile_destroy(call->video_profile);
1421                 call->video_profile=NULL;
1422         }
1423 }
1424
1425
1426
1427 void linphone_call_enable_echo_cancellation(LinphoneCall *call, bool_t enable) {
1428         if (call!=NULL && call->audiostream!=NULL && call->audiostream->ec){
1429                 bool_t bypass_mode = !enable;
1430                 ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_SET_BYPASS_MODE,&bypass_mode);
1431         }
1432 }
1433 bool_t linphone_call_echo_cancellation_enabled(LinphoneCall *call) {
1434         if (call!=NULL && call->audiostream!=NULL && call->audiostream->ec){
1435                 bool_t val;
1436                 ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_GET_BYPASS_MODE,&val);
1437                 return !val;
1438         } else {
1439                 return linphone_core_echo_cancellation_enabled(call->core);
1440         }
1441 }
1442
1443 void linphone_call_enable_echo_limiter(LinphoneCall *call, bool_t val){
1444         if (call!=NULL && call->audiostream!=NULL ) {
1445                 if (val) {
1446                 const char *type=lp_config_get_string(call->core->config,"sound","el_type","mic");
1447                 if (strcasecmp(type,"mic")==0)
1448                         audio_stream_enable_echo_limiter(call->audiostream,ELControlMic);
1449                 else if (strcasecmp(type,"full")==0)
1450                         audio_stream_enable_echo_limiter(call->audiostream,ELControlFull);
1451                 } else {
1452                         audio_stream_enable_echo_limiter(call->audiostream,ELInactive);
1453                 }
1454         }
1455 }
1456
1457 bool_t linphone_call_echo_limiter_enabled(const LinphoneCall *call){
1458         if (call!=NULL && call->audiostream!=NULL ){
1459                 return call->audiostream->el_type !=ELInactive ;
1460         } else {
1461                 return linphone_core_echo_limiter_enabled(call->core);
1462         }
1463 }
1464
1465 /**
1466  * @addtogroup call_misc
1467  * @{
1468 **/
1469
1470 /**
1471  * Returns the measured sound volume played locally (received from remote)
1472  * It is expressed in dbm0.
1473 **/
1474 float linphone_call_get_play_volume(LinphoneCall *call){
1475         AudioStream *st=call->audiostream;
1476         if (st && st->volrecv){
1477                 float vol=0;
1478                 ms_filter_call_method(st->volrecv,MS_VOLUME_GET,&vol);
1479                 return vol;
1480
1481         }
1482         return LINPHONE_VOLUME_DB_LOWEST;
1483 }
1484
1485 /**
1486  * Returns the measured sound volume recorded locally (sent to remote)
1487  * It is expressed in dbm0.
1488 **/
1489 float linphone_call_get_record_volume(LinphoneCall *call){
1490         AudioStream *st=call->audiostream;
1491         if (st && st->volsend && !call->audio_muted && call->state==LinphoneCallStreamsRunning){
1492                 float vol=0;
1493                 ms_filter_call_method(st->volsend,MS_VOLUME_GET,&vol);
1494                 return vol;
1495
1496         }
1497         return LINPHONE_VOLUME_DB_LOWEST;
1498 }
1499
1500 /**
1501  * Obtain real-time quality rating of the call
1502  *
1503  * Based on local RTP statistics and RTCP feedback, a quality rating is computed and updated
1504  * during all the duration of the call. This function returns its value at the time of the function call.
1505  * It is expected that the rating is updated at least every 5 seconds or so.
1506  * The rating is a floating point number comprised between 0 and 5.
1507  *
1508  * 4-5 = good quality <br>
1509  * 3-4 = average quality <br>
1510  * 2-3 = poor quality <br>
1511  * 1-2 = very poor quality <br>
1512  * 0-1 = can't be worse, mostly unusable <br>
1513  *
1514  * @returns The function returns -1 if no quality measurement is available, for example if no
1515  * active audio stream exist. Otherwise it returns the quality rating.
1516 **/
1517 float linphone_call_get_current_quality(LinphoneCall *call){
1518         if (call->audiostream){
1519                 return audio_stream_get_quality_rating(call->audiostream);
1520         }
1521         return -1;
1522 }
1523
1524 /**
1525  * Returns call quality averaged over all the duration of the call.
1526  *
1527  * See linphone_call_get_current_quality() for more details about quality measurement.
1528 **/
1529 float linphone_call_get_average_quality(LinphoneCall *call){
1530         if (call->audiostream){
1531                 return audio_stream_get_average_quality_rating(call->audiostream);
1532         }
1533         return -1;
1534 }
1535
1536 /**
1537  * @}
1538 **/
1539
1540 static void display_bandwidth(RtpSession *as, RtpSession *vs){
1541         ms_message("bandwidth usage: audio=[d=%.1f,u=%.1f] video=[d=%.1f,u=%.1f] kbit/sec",
1542         (as!=NULL) ? (rtp_session_compute_recv_bandwidth(as)*1e-3) : 0,
1543         (as!=NULL) ? (rtp_session_compute_send_bandwidth(as)*1e-3) : 0,
1544         (vs!=NULL) ? (rtp_session_compute_recv_bandwidth(vs)*1e-3) : 0,
1545         (vs!=NULL) ? (rtp_session_compute_send_bandwidth(vs)*1e-3) : 0);
1546 }
1547
1548 static void linphone_core_disconnected(LinphoneCore *lc, LinphoneCall *call){
1549         char temp[256];
1550         char *from=NULL;
1551         if(call)
1552                 from = linphone_call_get_remote_address_as_string(call);
1553         if (from)
1554         {
1555                 snprintf(temp,sizeof(temp),"Remote end %s seems to have disconnected, the call is going to be closed.",from);
1556                 free(from);
1557         }
1558         else
1559         {
1560                 snprintf(temp,sizeof(temp),"Remote end seems to have disconnected, the call is going to be closed.");
1561         }
1562         if (lc->vtable.display_warning!=NULL)
1563                 lc->vtable.display_warning(lc,temp);
1564         linphone_core_terminate_call(lc,call);
1565 }
1566
1567 void linphone_call_background_tasks(LinphoneCall *call, bool_t one_second_elapsed){
1568         int disconnect_timeout = linphone_core_get_nortp_timeout(call->core);
1569         bool_t disconnected=FALSE;
1570
1571         if (call->state==LinphoneCallStreamsRunning && one_second_elapsed){
1572                 RtpSession *as=NULL,*vs=NULL;
1573                 float audio_load=0, video_load=0;
1574                 if (call->audiostream!=NULL){
1575                         as=call->audiostream->session;
1576                         if (call->audiostream->ticker)
1577                                 audio_load=ms_ticker_get_average_load(call->audiostream->ticker);
1578                 }
1579                 if (call->videostream!=NULL){
1580                         if (call->videostream->ticker)
1581                                 video_load=ms_ticker_get_average_load(call->videostream->ticker);
1582                         vs=call->videostream->session;
1583                 }
1584                 display_bandwidth(as,vs);
1585                 ms_message("Thread processing load: audio=%f\tvideo=%f",audio_load,video_load);
1586         }
1587 #ifdef VIDEO_ENABLED
1588         if (call->videostream!=NULL) {
1589                 // Beware that the application queue should not depend on treatments fron the
1590                 // mediastreamer queue.
1591                 video_stream_iterate(call->videostream);
1592
1593                 if (call->videostream_app_evq){
1594                         OrtpEvent *ev;
1595                         while (NULL != (ev=ortp_ev_queue_get(call->videostream_app_evq))){
1596                                 OrtpEventType evt=ortp_event_get_type(ev);
1597                                 if (evt == ORTP_EVENT_ZRTP_ENCRYPTION_CHANGED){
1598                                         OrtpEventData *evd=ortp_event_get_data(ev);
1599                                         linphone_call_videostream_encryption_changed(call, evd->info.zrtp_stream_encrypted);
1600                                 }
1601                                 ortp_event_destroy(ev);
1602                         }
1603                 }
1604         }
1605 #endif
1606         if (call->audiostream!=NULL) {
1607                 // Beware that the application queue should not depend on treatments fron the
1608                 // mediastreamer queue.
1609                 audio_stream_iterate(call->audiostream);
1610
1611                 if (call->audiostream_app_evq){
1612                         OrtpEvent *ev;
1613                         while (NULL != (ev=ortp_ev_queue_get(call->audiostream_app_evq))){
1614                                 OrtpEventType evt=ortp_event_get_type(ev);
1615                                 if (evt == ORTP_EVENT_ZRTP_ENCRYPTION_CHANGED){
1616                                         OrtpEventData *evd=ortp_event_get_data(ev);
1617                                         linphone_call_audiostream_encryption_changed(call, evd->info.zrtp_stream_encrypted);
1618                                 } else if (evt == ORTP_EVENT_ZRTP_SAS_READY) {
1619                                         OrtpEventData *evd=ortp_event_get_data(ev);
1620                                         linphone_call_audiostream_auth_token_ready(call, evd->info.zrtp_sas.sas, evd->info.zrtp_sas.verified);
1621                                 }
1622                                 ortp_event_destroy(ev);
1623                         }
1624                 }
1625         }
1626         if (call->state==LinphoneCallStreamsRunning && one_second_elapsed && call->audiostream!=NULL && disconnect_timeout>0 )
1627                 disconnected=!audio_stream_alive(call->audiostream,disconnect_timeout);
1628         if (disconnected)
1629                 linphone_core_disconnected(call->core,call);
1630 }
1631
1632 void linphone_call_log_completed(LinphoneCall *call){
1633         LinphoneCore *lc=call->core;
1634
1635         call->log->duration=time(NULL)-call->start_time;
1636
1637         if (call->log->status==LinphoneCallMissed){
1638                 char *info;
1639                 lc->missed_calls++;
1640                 info=ortp_strdup_printf(ngettext("You have missed %i call.",
1641                                          "You have missed %i calls.", lc->missed_calls),
1642                                 lc->missed_calls);
1643         if (lc->vtable.display_status!=NULL)
1644             lc->vtable.display_status(lc,info);
1645                 ms_free(info);
1646         }
1647         lc->call_logs=ms_list_prepend(lc->call_logs,(void *)call->log);
1648         if (ms_list_size(lc->call_logs)>lc->max_call_logs){
1649                 MSList *elem,*prevelem=NULL;
1650                 /*find the last element*/
1651                 for(elem=lc->call_logs;elem!=NULL;elem=elem->next){
1652                         prevelem=elem;
1653                 }
1654                 elem=prevelem;
1655                 linphone_call_log_destroy((LinphoneCallLog*)elem->data);
1656                 lc->call_logs=ms_list_remove_link(lc->call_logs,elem);
1657         }
1658         if (lc->vtable.call_log_updated!=NULL){
1659                 lc->vtable.call_log_updated(lc,call->log);
1660         }
1661         call_logs_write_to_config_file(lc);
1662 }
1663
1664