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 #include "mediastreamer2/mssndcard.h"
  39
  40 #ifdef VIDEO_ENABLED
  41 static MSWebCam *get_nowebcam_device(){
  42         return ms_web_cam_manager_get_cam(ms_web_cam_manager_get(),"StaticImage: Static picture");
  43 }
  44 #endif
  45
  46 static bool_t generate_b64_crypto_key(int key_length, char* key_out) {
  47         int b64_size;
  48         uint8_t* tmp = (uint8_t*) malloc(key_length);
  49         if (ortp_crypto_get_random(tmp, key_length)!=0) {
  50                 ms_error("Failed to generate random key");
  51                 free(tmp);
  52                 return FALSE;
  53         }
  54
  55         b64_size = b64_encode((const char*)tmp, key_length, NULL, 0);
  56         if (b64_size == 0) {
  57                 ms_error("Failed to b64 encode key");
  58                 free(tmp);
  59                 return FALSE;
  60         }
  61         key_out[b64_size] = '\0';
  62         b64_encode((const char*)tmp, key_length, key_out, 40);
  63         free(tmp);
  64         return TRUE;
  65 }
  66
  67 LinphoneCore *linphone_call_get_core(const LinphoneCall *call){
  68         return call->core;
  69 }
  70
  71 const char* linphone_call_get_authentication_token(LinphoneCall *call){
  72         return call->auth_token;
  73 }
  74
  75 bool_t linphone_call_get_authentication_token_verified(LinphoneCall *call){
  76         return call->auth_token_verified;
  77 }
  78
  79 static bool_t linphone_call_are_all_streams_encrypted(LinphoneCall *call) {
  80         // Check ZRTP encryption in audiostream
  81         if (!call->audiostream_encrypted) {
  82                 return FALSE;
  83         }
  84
  85 #ifdef VIDEO_ENABLED
  86         // If video enabled, check ZRTP encryption in videostream
  87         const LinphoneCallParams *params=linphone_call_get_current_params(call);
  88         if (params->has_video && !call->videostream_encrypted) {
  89                 return FALSE;
  90         }
  91 #endif
  92
  93         return TRUE;
  94 }
  95
  96 void propagate_encryption_changed(LinphoneCall *call){
  97         LinphoneCore *lc=call->core;
  98         if (!linphone_call_are_all_streams_encrypted(call)) {
  99                 ms_message("Some streams are not encrypted");
 100                 call->current_params.media_encryption=LinphoneMediaEncryptionNone;
 101                 if (lc->vtable.call_encryption_changed)
 102                         lc->vtable.call_encryption_changed(call->core, call, FALSE, call->auth_token);
 103         } else {
 104                 ms_message("All streams are encrypted");
 105                 call->current_params.media_encryption=LinphoneMediaEncryptionZRTP;
 106                 if (lc->vtable.call_encryption_changed)
 107                         lc->vtable.call_encryption_changed(call->core, call, TRUE, call->auth_token);
 108         }
 109 }
 110
 111 #ifdef VIDEO_ENABLED
 112 static void linphone_call_videostream_encryption_changed(void *data, bool_t encrypted){
 113         ms_message("Video stream is %s", encrypted ? "encrypted" : "not encrypted");
 114
 115         LinphoneCall *call = (LinphoneCall *)data;
 116         call->videostream_encrypted=encrypted;
 117         propagate_encryption_changed(call);
 118 }
 119 #endif
 120
 121 static void linphone_call_audiostream_encryption_changed(void *data, bool_t encrypted) {
 122         char status[255]={0};
 123         ms_message("Audio stream is %s ", encrypted ? "encrypted" : "not encrypted");
 124
 125         LinphoneCall *call = (LinphoneCall *)data;
 126         call->audiostream_encrypted=encrypted;
 127
 128         if (encrypted && call->core->vtable.display_status != NULL) {
 129                 snprintf(status,sizeof(status)-1,_("Authentication token is %s"),call->auth_token);
 130                  call->core->vtable.display_status(call->core, status);
 131         }
 132
 133         propagate_encryption_changed(call);
 134
 135
 136 #ifdef VIDEO_ENABLED
 137         // Enable video encryption
 138         const LinphoneCallParams *params=linphone_call_get_current_params(call);
 139         if (params->has_video) {
 140                 ms_message("Trying to enable encryption on video stream");
 141                 OrtpZrtpParams params;
 142                 params.zid_file=NULL; //unused
 143                 video_stream_enable_zrtp(call->videostream,call->audiostream,&params);
 144         }
 145 #endif
 146 }
 147
 148
 149 static void linphone_call_audiostream_auth_token_ready(void *data, const char* auth_token, bool_t verified) {
 150         LinphoneCall *call=(LinphoneCall *)data;
 151         if (call->auth_token != NULL)
 152                 ms_free(call->auth_token);
 153
 154         call->auth_token=ms_strdup(auth_token);
 155         call->auth_token_verified=verified;
 156
 157         ms_message("Authentication token is %s (%s)", auth_token, verified?"verified":"unverified");
 158 }
 159
 160 void linphone_call_set_authentication_token_verified(LinphoneCall *call, bool_t verified){
 161         if (call->audiostream==NULL){
 162                 ms_error("linphone_call_set_authentication_token_verified(): No audio stream");
 163         }
 164         if (call->audiostream->ortpZrtpContext==NULL){
 165                 ms_error("linphone_call_set_authentication_token_verified(): No zrtp context.");
 166         }
 167         if (!call->auth_token_verified && verified){
 168                 ortp_zrtp_sas_verified(call->audiostream->ortpZrtpContext);
 169         }else if (call->auth_token_verified && !verified){
 170                 ortp_zrtp_sas_reset_verified(call->audiostream->ortpZrtpContext);
 171         }
 172         call->auth_token_verified=verified;
 173         propagate_encryption_changed(call);
 174 }
 175
 176 static MSList *make_codec_list(LinphoneCore *lc, const MSList *codecs, int bandwidth_limit,int* max_sample_rate){
 177         MSList *l=NULL;
 178         const MSList *it;
 179         if (max_sample_rate) *max_sample_rate=0;
 180         for(it=codecs;it!=NULL;it=it->next){
 181                 PayloadType *pt=(PayloadType*)it->data;
 182                 if (pt->flags & PAYLOAD_TYPE_ENABLED){
 183                         if (bandwidth_limit>0 && !linphone_core_is_payload_type_usable_for_bandwidth(lc,pt,bandwidth_limit)){
 184                                 ms_message("Codec %s/%i eliminated because of audio bandwidth constraint.",pt->mime_type,pt->clock_rate);
 185                                 continue;
 186                         }
 187                         if (linphone_core_check_payload_type_usability(lc,pt)){
 188                                 l=ms_list_append(l,payload_type_clone(pt));
 189                                 if (max_sample_rate && payload_type_get_rate(pt)>*max_sample_rate) *max_sample_rate=payload_type_get_rate(pt);
 190                         }
 191                 }
 192         }
 193         return l;
 194 }
 195
 196 static SalMediaDescription *_create_local_media_description(LinphoneCore *lc, LinphoneCall *call, unsigned int session_id, unsigned int session_ver){
 197         MSList *l;
 198         PayloadType *pt;
 199         int i;
 200         const char *me=linphone_core_get_identity(lc);
 201         LinphoneAddress *addr=linphone_address_new(me);
 202         const char *username=linphone_address_get_username (addr);
 203         SalMediaDescription *md=sal_media_description_new();
 204
 205         md->session_id=session_id;
 206         md->session_ver=session_ver;
 207         md->nstreams=1;
 208         strncpy(md->addr,call->localip,sizeof(md->addr));
 209         strncpy(md->username,username,sizeof(md->username));
 210         md->bandwidth=linphone_core_get_download_bandwidth(lc);
 211
 212         /*set audio capabilities */
 213         strncpy(md->streams[0].rtp_addr,call->localip,sizeof(md->streams[0].rtp_addr));
 214         strncpy(md->streams[0].rtcp_addr,call->localip,sizeof(md->streams[0].rtcp_addr));
 215         md->streams[0].rtp_port=call->audio_port;
 216         md->streams[0].rtcp_port=call->audio_port+1;
 217         md->streams[0].proto=(call->params.media_encryption == LinphoneMediaEncryptionSRTP) ?
 218                 SalProtoRtpSavp : SalProtoRtpAvp;
 219         md->streams[0].type=SalAudio;
 220         md->streams[0].ptime=lc->net_conf.down_ptime;
 221         l=make_codec_list(lc,lc->codecs_conf.audio_codecs,call->params.audio_bw,&md->streams[0].max_rate);
 222         pt=payload_type_clone(rtp_profile_get_payload_from_mime(&av_profile,"telephone-event"));
 223         l=ms_list_append(l,pt);
 224         md->streams[0].payloads=l;
 225
 226
 227
 228         if (call->params.has_video){
 229                 md->nstreams++;
 230                 md->streams[1].rtp_port=call->video_port;
 231                 md->streams[1].rtcp_port=call->video_port+1;
 232                 md->streams[1].proto=md->streams[0].proto;
 233                 md->streams[1].type=SalVideo;
 234                 l=make_codec_list(lc,lc->codecs_conf.video_codecs,0,NULL);
 235                 md->streams[1].payloads=l;
 236         }
 237
 238         for(i=0; i<md->nstreams; i++) {
 239                 if (md->streams[i].proto == SalProtoRtpSavp) {
 240                         md->streams[i].crypto[0].tag = 1;
 241                         md->streams[i].crypto[0].algo = AES_128_SHA1_80;
 242                         if (!generate_b64_crypto_key(30, md->streams[i].crypto[0].master_key))
 243                                 md->streams[i].crypto[0].algo = 0;
 244                         md->streams[i].crypto[1].tag = 2;
 245                         md->streams[i].crypto[1].algo = AES_128_SHA1_32;
 246                         if (!generate_b64_crypto_key(30, md->streams[i].crypto[1].master_key))
 247                                 md->streams[i].crypto[1].algo = 0;
 248                         md->streams[i].crypto[2].algo = 0;
 249                 }
 250                 if ((linphone_core_get_firewall_policy(call->core) == LinphonePolicyUseIce) && (call->ice_session != NULL) && (ice_session_check_list(call->ice_session, i) == NULL)) {
 251                         ice_session_add_check_list(call->ice_session, ice_check_list_new());
 252                 }
 253         }
 254
 255         linphone_address_destroy(addr);
 256         return md;
 257 }
 258
 259 void update_local_media_description(LinphoneCore *lc, LinphoneCall *call){
 260         SalMediaDescription *md=call->localdesc;
 261         if (md== NULL) {
 262                 call->localdesc = create_local_media_description(lc,call);
 263         } else {
 264                 call->localdesc = _create_local_media_description(lc,call,md->session_id,md->session_ver+1);
 265                 sal_media_description_unref(md);
 266         }
 267 }
 268
 269 SalMediaDescription *create_local_media_description(LinphoneCore *lc, LinphoneCall *call){
 270         unsigned int id=rand() & 0xfff;
 271         return _create_local_media_description(lc,call,id,id);
 272 }
 273
 274 static int find_port_offset(LinphoneCore *lc){
 275         int offset;
 276         MSList *elem;
 277         int audio_port;
 278         bool_t already_used=FALSE;
 279         for(offset=0;offset<100;offset+=2){
 280                 audio_port=linphone_core_get_audio_port (lc)+offset;
 281                 already_used=FALSE;
 282                 for(elem=lc->calls;elem!=NULL;elem=elem->next){
 283                         LinphoneCall *call=(LinphoneCall*)elem->data;
 284                         if (call->audio_port==audio_port) {
 285                                 already_used=TRUE;
 286                                 break;
 287                         }
 288                 }
 289                 if (!already_used) break;
 290         }
 291         if (offset==100){
 292                 ms_error("Could not find any free port !");
 293                 return -1;
 294         }
 295         return offset;
 296 }
 297
 298 static void linphone_call_init_common(LinphoneCall *call, LinphoneAddress *from, LinphoneAddress *to){
 299         int port_offset;
 300         call->magic=linphone_call_magic;
 301         call->refcnt=1;
 302         call->state=LinphoneCallIdle;
 303         call->transfer_state = LinphoneCallIdle;
 304         call->start_time=time(NULL);
 305         call->media_start_time=0;
 306         call->log=linphone_call_log_new(call, from, to);
 307         call->owns_call_log=TRUE;
 308         linphone_core_notify_all_friends(call->core,LinphoneStatusOnThePhone);
 309         port_offset=find_port_offset (call->core);
 310         if (port_offset==-1) return;
 311         call->audio_port=linphone_core_get_audio_port(call->core)+port_offset;
 312         call->video_port=linphone_core_get_video_port(call->core)+port_offset;
 313         linphone_call_init_stats(&call->stats[LINPHONE_CALL_STATS_AUDIO], LINPHONE_CALL_STATS_AUDIO);
 314         linphone_call_init_stats(&call->stats[LINPHONE_CALL_STATS_VIDEO], LINPHONE_CALL_STATS_VIDEO);
 315 }
 316
 317 void linphone_call_init_stats(LinphoneCallStats *stats, int type) {
 318         stats->type = type;
 319         stats->received_rtcp = NULL;
 320         stats->sent_rtcp = NULL;
 321 }
 322
 323 static void discover_mtu(LinphoneCore *lc, const char *remote){
 324         int mtu;
 325         if (lc->net_conf.mtu==0 ){
 326                 /*attempt to discover mtu*/
 327                 mtu=ms_discover_mtu(remote);
 328                 if (mtu>0){
 329                         ms_set_mtu(mtu);
 330                         ms_message("Discovered mtu is %i, RTP payload max size is %i",
 331                                 mtu, ms_get_payload_max_size());
 332                 }
 333         }
 334 }
 335
 336 LinphoneCall * linphone_call_new_outgoing(struct _LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, const LinphoneCallParams *params)
 337 {
 338         LinphoneCall *call=ms_new0(LinphoneCall,1);
 339         call->dir=LinphoneCallOutgoing;
 340         call->op=sal_op_new(lc->sal);
 341         sal_op_set_user_pointer(call->op,call);
 342         call->core=lc;
 343         linphone_core_get_local_ip(lc,linphone_address_get_domain(to),call->localip);
 344         linphone_call_init_common(call,from,to);
 345         call->params=*params;
 346         if (linphone_core_get_firewall_policy(call->core) == LinphonePolicyUseIce) {
 347                 call->ice_session = ice_session_new();
 348                 ice_session_set_role(call->ice_session, IR_Controlling);
 349         }
 350         call->localdesc=create_local_media_description (lc,call);
 351         call->camera_active=params->has_video;
 352         if (linphone_core_get_firewall_policy(call->core) == LinphonePolicyUseStun) {
 353                 linphone_core_run_stun_tests(call->core,call);
 354         }
 355         discover_mtu(lc,linphone_address_get_domain (to));
 356         if (params->referer){
 357                 sal_call_set_referer(call->op,params->referer->op);
 358                 call->referer=linphone_call_ref(params->referer);
 359         }
 360         return call;
 361 }
 362
 363 LinphoneCall * linphone_call_new_incoming(LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, SalOp *op){
 364         LinphoneCall *call=ms_new0(LinphoneCall,1);
 365         char *from_str;
 366
 367         call->dir=LinphoneCallIncoming;
 368         sal_op_set_user_pointer(op,call);
 369         call->op=op;
 370         call->core=lc;
 371
 372         if (lc->sip_conf.ping_with_options){
 373                 /*the following sends an option request back to the caller so that
 374                  we get a chance to discover our nat'd address before answering.*/
 375                 call->ping_op=sal_op_new(lc->sal);
 376                 from_str=linphone_address_as_string_uri_only(from);
 377                 sal_op_set_route(call->ping_op,sal_op_get_network_origin(op));
 378                 sal_op_set_user_pointer(call->ping_op,call);
 379                 sal_ping(call->ping_op,linphone_core_find_best_identity(lc,from,NULL),from_str);
 380                 ms_free(from_str);
 381         }
 382
 383         linphone_address_clean(from);
 384         linphone_core_get_local_ip(lc,linphone_address_get_domain(from),call->localip);
 385         linphone_call_init_common(call, from, to);
 386         linphone_core_init_default_params(lc, &call->params);
 387         call->params.has_video &= !!lc->video_policy.automatically_accept;
 388         call->localdesc=create_local_media_description (lc,call);
 389         call->camera_active=call->params.has_video;
 390         switch (linphone_core_get_firewall_policy(call->core)) {
 391                 case LinphonePolicyUseIce:
 392                         call->ice_session = ice_session_new();
 393                         ice_session_set_role(call->ice_session, IR_Controlled);
 394                         linphone_core_update_ice_from_remote_media_description(call, sal_call_get_remote_media_description(op));
 395                         if (call->ice_session != NULL) {
 396                                 linphone_call_init_media_streams(call);
 397                                 linphone_call_start_media_streams_for_ice_gathering(call);
 398                                 if (linphone_core_gather_ice_candidates(call->core,call)<0) {
 399                                         /* Ice candidates gathering failed, proceed with the call anyway. */
 400                                         linphone_call_delete_ice_session(call);
 401                                         linphone_call_stop_media_streams(call);
 402                                 }
 403                         }
 404                         break;
 405                 case LinphonePolicyUseStun:
 406                         linphone_core_run_stun_tests(call->core,call);
 407                         /* No break to also destroy ice session in this case. */
 408                 default:
 409                         break;
 410         }
 411         discover_mtu(lc,linphone_address_get_domain(from));
 412         return call;
 413 }
 414
 415 /* this function is called internally to get rid of a call.
 416  It performs the following tasks:
 417  - remove the call from the internal list of calls
 418  - update the call logs accordingly
 419 */
 420
 421 static void linphone_call_set_terminated(LinphoneCall *call){
 422         LinphoneCore *lc=call->core;
 423
 424         linphone_core_update_allocated_audio_bandwidth(lc);
 425
 426         call->owns_call_log=FALSE;
 427         linphone_call_log_completed(call);
 428
 429
 430         if (call == lc->current_call){
 431                 ms_message("Resetting the current call");
 432                 lc->current_call=NULL;
 433         }
 434
 435         if (linphone_core_del_call(lc,call) != 0){
 436                 ms_error("Could not remove the call from the list !!!");
 437         }
 438
 439         if (ms_list_size(lc->calls)==0)
 440                 linphone_core_notify_all_friends(lc,lc->presence_mode);
 441
 442         linphone_core_conference_check_uninit(lc);
 443         if (call->ringing_beep){
 444                 linphone_core_stop_dtmf(lc);
 445                 call->ringing_beep=FALSE;
 446         }
 447         if (call->referer){
 448                 linphone_call_unref(call->referer);
 449                 call->referer=NULL;
 450         }
 451 }
 452
 453 void linphone_call_fix_call_parameters(LinphoneCall *call){
 454         call->params.has_video=call->current_params.has_video;
 455         call->params.media_encryption=call->current_params.media_encryption;
 456 }
 457
 458 const char *linphone_call_state_to_string(LinphoneCallState cs){
 459         switch (cs){
 460                 case LinphoneCallIdle:
 461                         return "LinphoneCallIdle";
 462                 case LinphoneCallIncomingReceived:
 463                         return "LinphoneCallIncomingReceived";
 464                 case LinphoneCallOutgoingInit:
 465                         return "LinphoneCallOutgoingInit";
 466                 case LinphoneCallOutgoingProgress:
 467                         return "LinphoneCallOutgoingProgress";
 468                 case LinphoneCallOutgoingRinging:
 469                         return "LinphoneCallOutgoingRinging";
 470                 case LinphoneCallOutgoingEarlyMedia:
 471                         return "LinphoneCallOutgoingEarlyMedia";
 472                 case LinphoneCallConnected:
 473                         return "LinphoneCallConnected";
 474                 case LinphoneCallStreamsRunning:
 475                         return "LinphoneCallStreamsRunning";
 476                 case LinphoneCallPausing:
 477                         return "LinphoneCallPausing";
 478                 case LinphoneCallPaused:
 479                         return "LinphoneCallPaused";
 480                 case LinphoneCallResuming:
 481                         return "LinphoneCallResuming";
 482                 case LinphoneCallRefered:
 483                         return "LinphoneCallRefered";
 484                 case LinphoneCallError:
 485                         return "LinphoneCallError";
 486                 case LinphoneCallEnd:
 487                         return "LinphoneCallEnd";
 488                 case LinphoneCallPausedByRemote:
 489                         return "LinphoneCallPausedByRemote";
 490                 case LinphoneCallUpdatedByRemote:
 491                         return "LinphoneCallUpdatedByRemote";
 492                 case LinphoneCallIncomingEarlyMedia:
 493                         return "LinphoneCallIncomingEarlyMedia";
 494                 case LinphoneCallUpdated:
 495                         return "LinphoneCallUpdated";
 496                 case LinphoneCallReleased:
 497                         return "LinphoneCallReleased";
 498         }
 499         return "undefined state";
 500 }
 501
 502 void linphone_call_set_state(LinphoneCall *call, LinphoneCallState cstate, const char *message){
 503         LinphoneCore *lc=call->core;
 504
 505         if (call->state!=cstate){
 506                 if (call->state==LinphoneCallEnd || call->state==LinphoneCallError){
 507                         if (cstate!=LinphoneCallReleased){
 508                                 ms_warning("Spurious call state change from %s to %s, ignored.",linphone_call_state_to_string(call->state),
 509                                    linphone_call_state_to_string(cstate));
 510                                 return;
 511                         }
 512                 }
 513                 ms_message("Call %p: moving from state %s to %s",call,linphone_call_state_to_string(call->state),
 514                            linphone_call_state_to_string(cstate));
 515                 if (cstate!=LinphoneCallRefered){
 516                         /*LinphoneCallRefered is rather an event, not a state.
 517                          Indeed it does not change the state of the call (still paused or running)*/
 518                         call->state=cstate;
 519                 }
 520                 if (cstate==LinphoneCallEnd || cstate==LinphoneCallError){
 521              switch(call->reason){
 522                                 case LinphoneReasonDeclined:
 523                                         call->log->status=LinphoneCallDeclined;
 524                                 case LinphoneReasonNotAnswered:
 525                                         call->log->status=LinphoneCallMissed;
 526                                 break;
 527                                 default:
 528                                 break;
 529                         }
 530                         linphone_call_set_terminated (call);
 531                 }
 532                 if (cstate == LinphoneCallConnected) {
 533                         call->log->status=LinphoneCallSuccess;
 534                         call->media_start_time=time(NULL);
 535                 }
 536
 537                 if (lc->vtable.call_state_changed)
 538                         lc->vtable.call_state_changed(lc,call,cstate,message);
 539                 if (cstate==LinphoneCallReleased){
 540                         if (call->op!=NULL) {
 541                                 /* so that we cannot have anymore upcalls for SAL
 542                                  concerning this call*/
 543                                 sal_op_release(call->op);
 544                                 call->op=NULL;
 545                         }
 546                         linphone_call_unref(call);
 547                 }
 548         }
 549 }
 550
 551 static void linphone_call_destroy(LinphoneCall *obj)
 552 {
 553         if (obj->op!=NULL) {
 554                 sal_op_release(obj->op);
 555                 obj->op=NULL;
 556         }
 557         if (obj->resultdesc!=NULL) {
 558                 sal_media_description_unref(obj->resultdesc);
 559                 obj->resultdesc=NULL;
 560         }
 561         if (obj->localdesc!=NULL) {
 562                 sal_media_description_unref(obj->localdesc);
 563                 obj->localdesc=NULL;
 564         }
 565         if (obj->ping_op) {
 566                 sal_op_release(obj->ping_op);
 567         }
 568         if (obj->refer_to){
 569                 ms_free(obj->refer_to);
 570         }
 571         if (obj->owns_call_log)
 572                 linphone_call_log_destroy(obj->log);
 573         if (obj->auth_token) {
 574                 ms_free(obj->auth_token);
 575         }
 576         if (obj->ice_session) {
 577                 ice_session_destroy(obj->ice_session);
 578         }
 579
 580         ms_free(obj);
 581 }
 582
 583 /**
 584  * @addtogroup call_control
 585  * @{
 586 **/
 587
 588 /**
 589  * Increments the call 's reference count.
 590  * An application that wishes to retain a pointer to call object
 591  * must use this function to unsure the pointer remains
 592  * valid. Once the application no more needs this pointer,
 593  * it must call linphone_call_unref().
 594 **/
 595 LinphoneCall * linphone_call_ref(LinphoneCall *obj){
 596         obj->refcnt++;
 597         return obj;
 598 }
 599
 600 /**
 601  * Decrements the call object reference count.
 602  * See linphone_call_ref().
 603 **/
 604 void linphone_call_unref(LinphoneCall *obj){
 605         obj->refcnt--;
 606         if (obj->refcnt==0){
 607                 linphone_call_destroy(obj);
 608         }
 609 }
 610
 611 /**
 612  * Returns current parameters associated to the call.
 613 **/
 614 const LinphoneCallParams * linphone_call_get_current_params(const LinphoneCall *call){
 615         return &call->current_params;
 616 }
 617
 618 static bool_t is_video_active(const SalStreamDescription *sd){
 619         return sd->rtp_port!=0 && sd->dir!=SalStreamInactive;
 620 }
 621
 622 /**
 623  * Returns call parameters proposed by remote.
 624  *
 625  * This is useful when receiving an incoming call, to know whether the remote party
 626  * supports video, encryption or whatever.
 627 **/
 628 const LinphoneCallParams * linphone_call_get_remote_params(LinphoneCall *call){
 629         LinphoneCallParams *cp=&call->remote_params;
 630         memset(cp,0,sizeof(*cp));
 631         if (call->op){
 632                 SalMediaDescription *md=sal_call_get_remote_media_description(call->op);
 633                 if (md){
 634                         SalStreamDescription *asd,*vsd,*secure_asd,*secure_vsd;
 635
 636                         asd=sal_media_description_find_stream(md,SalProtoRtpAvp,SalAudio);
 637                         vsd=sal_media_description_find_stream(md,SalProtoRtpAvp,SalVideo);
 638                         secure_asd=sal_media_description_find_stream(md,SalProtoRtpSavp,SalAudio);
 639                         secure_vsd=sal_media_description_find_stream(md,SalProtoRtpSavp,SalVideo);
 640                         if (secure_vsd){
 641                                 cp->has_video=is_video_active(secure_vsd);
 642                                 if (secure_asd || asd==NULL)
 643                                         cp->media_encryption=LinphoneMediaEncryptionSRTP;
 644                         }else if (vsd){
 645                                 cp->has_video=is_video_active(vsd);
 646                         }
 647                         return cp;
 648                 }
 649         }
 650         return NULL;
 651 }
 652
 653 /**
 654  * Returns the remote address associated to this call
 655  *
 656 **/
 657 const LinphoneAddress * linphone_call_get_remote_address(const LinphoneCall *call){
 658         return call->dir==LinphoneCallIncoming ? call->log->from : call->log->to;
 659 }
 660
 661 /**
 662  * Returns the remote address associated to this call as a string.
 663  *
 664  * The result string must be freed by user using ms_free().
 665 **/
 666 char *linphone_call_get_remote_address_as_string(const LinphoneCall *call){
 667         return linphone_address_as_string(linphone_call_get_remote_address(call));
 668 }
 669
 670 /**
 671  * Retrieves the call's current state.
 672 **/
 673 LinphoneCallState linphone_call_get_state(const LinphoneCall *call){
 674         return call->state;
 675 }
 676
 677 /**
 678  * Returns the reason for a call termination (either error or normal termination)
 679 **/
 680 LinphoneReason linphone_call_get_reason(const LinphoneCall *call){
 681         return call->reason;
 682 }
 683
 684 /**
 685  * Get the user_pointer in the LinphoneCall
 686  *
 687  * @ingroup call_control
 688  *
 689  * return user_pointer an opaque user pointer that can be retrieved at any time
 690 **/
 691 void *linphone_call_get_user_pointer(LinphoneCall *call)
 692 {
 693         return call->user_pointer;
 694 }
 695
 696 /**
 697  * Set the user_pointer in the LinphoneCall
 698  *
 699  * @ingroup call_control
 700  *
 701  * the user_pointer is an opaque user pointer that can be retrieved at any time in the LinphoneCall
 702 **/
 703 void linphone_call_set_user_pointer(LinphoneCall *call, void *user_pointer)
 704 {
 705         call->user_pointer = user_pointer;
 706 }
 707
 708 /**
 709  * Returns the call log associated to this call.
 710 **/
 711 LinphoneCallLog *linphone_call_get_call_log(const LinphoneCall *call){
 712         return call->log;
 713 }
 714
 715 /**
 716  * Returns the refer-to uri (if the call was transfered).
 717 **/
 718 const char *linphone_call_get_refer_to(const LinphoneCall *call){
 719         return call->refer_to;
 720 }
 721
 722 /**
 723  * Returns direction of the call (incoming or outgoing).
 724 **/
 725 LinphoneCallDir linphone_call_get_dir(const LinphoneCall *call){
 726         return call->log->dir;
 727 }
 728
 729 /**
 730  * Returns the far end's user agent description string, if available.
 731 **/
 732 const char *linphone_call_get_remote_user_agent(LinphoneCall *call){
 733         if (call->op){
 734                 return sal_op_get_remote_ua (call->op);
 735         }
 736         return NULL;
 737 }
 738
 739 /**
 740  * Returns true if this calls has received a transfer that has not been
 741  * executed yet.
 742  * Pending transfers are executed when this call is being paused or closed,
 743  * locally or by remote endpoint.
 744  * If the call is already paused while receiving the transfer request, the
 745  * transfer immediately occurs.
 746 **/
 747 bool_t linphone_call_has_transfer_pending(const LinphoneCall *call){
 748         return call->refer_pending;
 749 }
 750
 751 /**
 752  * Returns call's duration in seconds.
 753 **/
 754 int linphone_call_get_duration(const LinphoneCall *call){
 755         if (call->media_start_time==0) return 0;
 756         return time(NULL)-call->media_start_time;
 757 }
 758
 759 /**
 760  * Returns the call object this call is replacing, if any.
 761  * Call replacement can occur during call transfers.
 762  * By default, the core automatically terminates the replaced call and accept the new one.
 763  * This function allows the application to know whether a new incoming call is a one that replaces another one.
 764 **/
 765 LinphoneCall *linphone_call_get_replaced_call(LinphoneCall *call){
 766         SalOp *op=sal_call_get_replaces(call->op);
 767         if (op){
 768                 return (LinphoneCall*)sal_op_get_user_pointer(op);
 769         }
 770         return NULL;
 771 }
 772
 773 /**
 774  * Indicate whether camera input should be sent to remote end.
 775 **/
 776 void linphone_call_enable_camera (LinphoneCall *call, bool_t enable){
 777 #ifdef VIDEO_ENABLED
 778         if (call->videostream!=NULL && call->videostream->ticker!=NULL){
 779                 LinphoneCore *lc=call->core;
 780                 MSWebCam *nowebcam=get_nowebcam_device();
 781                 if (call->camera_active!=enable && lc->video_conf.device!=nowebcam){
 782                         video_stream_change_camera(call->videostream,
 783                                      enable ? lc->video_conf.device : nowebcam);
 784                 }
 785         }
 786         call->camera_active=enable;
 787 #endif
 788 }
 789
 790 /**
 791  * Take a photo of currently received video and write it into a jpeg file.
 792 **/
 793 int linphone_call_take_video_snapshot(LinphoneCall *call, const char *file){
 794 #ifdef VIDEO_ENABLED
 795         if (call->videostream!=NULL && call->videostream->jpegwriter!=NULL){
 796                 return ms_filter_call_method(call->videostream->jpegwriter,MS_JPEG_WRITER_TAKE_SNAPSHOT,(void*)file);
 797         }
 798         ms_warning("Cannot take snapshot: no currently running video stream on this call.");
 799         return -1;
 800 #endif
 801         return -1;
 802 }
 803
 804 /**
 805  * Returns TRUE if camera pictures are sent to the remote party.
 806 **/
 807 bool_t linphone_call_camera_enabled (const LinphoneCall *call){
 808         return call->camera_active;
 809 }
 810
 811 /**
 812  * Enable video stream.
 813 **/
 814 void linphone_call_params_enable_video(LinphoneCallParams *cp, bool_t enabled){
 815         cp->has_video=enabled;
 816 }
 817
 818 const PayloadType* linphone_call_params_get_used_audio_codec(const LinphoneCallParams *cp) {
 819         return cp->audio_codec;
 820 }
 821
 822 const PayloadType* linphone_call_params_get_used_video_codec(const LinphoneCallParams *cp) {
 823         return cp->video_codec;
 824 }
 825
 826 /**
 827  * Returns whether video is enabled.
 828 **/
 829 bool_t linphone_call_params_video_enabled(const LinphoneCallParams *cp){
 830         return cp->has_video;
 831 }
 832
 833 enum LinphoneMediaEncryption linphone_call_params_get_media_encryption(const LinphoneCallParams *cp) {
 834         return cp->media_encryption;
 835 }
 836
 837 void linphone_call_params_set_media_encryption(LinphoneCallParams *cp, enum LinphoneMediaEncryption e) {
 838         cp->media_encryption = e;
 839 }
 840
 841
 842 /**
 843  * Enable sending of real early media (during outgoing calls).
 844 **/
 845 void linphone_call_params_enable_early_media_sending(LinphoneCallParams *cp, bool_t enabled){
 846         cp->real_early_media=enabled;
 847 }
 848
 849 bool_t linphone_call_params_early_media_sending_enabled(const LinphoneCallParams *cp){
 850         return cp->real_early_media;
 851 }
 852
 853 /**
 854  * Returns true if the call is part of the locally managed conference.
 855 **/
 856 bool_t linphone_call_params_local_conference_mode(const LinphoneCallParams *cp){
 857         return cp->in_conference;
 858 }
 859
 860 /**
 861  * Refine bandwidth settings for this call by setting a bandwidth limit for audio streams.
 862  * As a consequence, codecs whose bitrates are not compatible with this limit won't be used.
 863 **/
 864 void linphone_call_params_set_audio_bandwidth_limit(LinphoneCallParams *cp, int bandwidth){
 865         cp->audio_bw=bandwidth;
 866 }
 867
 868 #ifdef VIDEO_ENABLED
 869 /**
 870  * Request remote side to send us a Video Fast Update.
 871 **/
 872 void linphone_call_send_vfu_request(LinphoneCall *call)
 873 {
 874         if (LinphoneCallStreamsRunning == linphone_call_get_state(call))
 875                 sal_call_send_vfu_request(call->op);
 876 }
 877 #endif
 878
 879 /**
 880  *
 881 **/
 882 LinphoneCallParams * linphone_call_params_copy(const LinphoneCallParams *cp){
 883         LinphoneCallParams *ncp=ms_new0(LinphoneCallParams,1);
 884         memcpy(ncp,cp,sizeof(LinphoneCallParams));
 885         return ncp;
 886 }
 887
 888 /**
 889  *
 890 **/
 891 void linphone_call_params_destroy(LinphoneCallParams *p){
 892         ms_free(p);
 893 }
 894
 895 /**
 896  * @}
 897 **/
 898
 899
 900 #ifdef TEST_EXT_RENDERER
 901 static void rendercb(void *data, const MSPicture *local, const MSPicture *remote){
 902         ms_message("rendercb, local buffer=%p, remote buffer=%p",
 903                    local ? local->planes[0] : NULL, remote? remote->planes[0] : NULL);
 904 }
 905 #endif
 906
 907 #ifdef VIDEO_ENABLED
 908 static void video_stream_event_cb(void *user_pointer, const MSFilter *f, const unsigned int event_id, const void *args){
 909     LinphoneCall* call = (LinphoneCall*) user_pointer;
 910         ms_warning("In linphonecall.c: video_stream_event_cb");
 911         switch (event_id) {
 912                 case MS_VIDEO_DECODER_DECODING_ERRORS:
 913                         ms_warning("Case is MS_VIDEO_DECODER_DECODING_ERRORS");
 914                         linphone_call_send_vfu_request(call);
 915                         break;
 916         case MS_VIDEO_DECODER_FIRST_IMAGE_DECODED:
 917             ms_message("First video frame decoded successfully");
 918             if (call->nextVideoFrameDecoded._func != NULL)
 919                 call->nextVideoFrameDecoded._func(call, call->nextVideoFrameDecoded._user_data);
 920             break;
 921                 default:
 922                         ms_warning("Unhandled event %i", event_id);
 923                         break;
 924         }
 925 }
 926 #endif
 927
 928 void linphone_call_set_next_video_frame_decoded_callback(LinphoneCall *call, LinphoneCallCbFunc cb, void* user_data) {
 929     call->nextVideoFrameDecoded._func = cb;
 930     call->nextVideoFrameDecoded._user_data = user_data;
 931 #ifdef VIDEO_ENABLED
 932     ms_filter_call_method_noarg(call->videostream->decoder, MS_VIDEO_DECODER_RESET_FIRST_IMAGE_NOTIFICATION);
 933 #endif
 934 }
 935
 936 void linphone_call_init_audio_stream(LinphoneCall *call){
 937         LinphoneCore *lc=call->core;
 938         SalMediaDescription *md=call->localdesc;
 939         AudioStream *audiostream;
 940
 941         call->audiostream=audiostream=audio_stream_new(md->streams[0].rtp_port,md->streams[0].rtcp_port,linphone_core_ipv6_enabled(lc));
 942         if (linphone_core_echo_limiter_enabled(lc)){
 943                 const char *type=lp_config_get_string(lc->config,"sound","el_type","mic");
 944                 if (strcasecmp(type,"mic")==0)
 945                         audio_stream_enable_echo_limiter(audiostream,ELControlMic);
 946                 else if (strcasecmp(type,"full")==0)
 947                         audio_stream_enable_echo_limiter(audiostream,ELControlFull);
 948         }
 949         audio_stream_enable_gain_control(audiostream,TRUE);
 950         if (linphone_core_echo_cancellation_enabled(lc)){
 951                 int len,delay,framesize;
 952                 const char *statestr=lp_config_get_string(lc->config,"sound","ec_state",NULL);
 953                 len=lp_config_get_int(lc->config,"sound","ec_tail_len",0);
 954                 delay=lp_config_get_int(lc->config,"sound","ec_delay",0);
 955                 framesize=lp_config_get_int(lc->config,"sound","ec_framesize",0);
 956                 audio_stream_set_echo_canceller_params(audiostream,len,delay,framesize);
 957                 if (statestr && audiostream->ec){
 958                         ms_filter_call_method(audiostream->ec,MS_ECHO_CANCELLER_SET_STATE_STRING,(void*)statestr);
 959                 }
 960         }
 961         audio_stream_enable_automatic_gain_control(audiostream,linphone_core_agc_enabled(lc));
 962         {
 963                 int enabled=lp_config_get_int(lc->config,"sound","noisegate",0);
 964                 audio_stream_enable_noise_gate(audiostream,enabled);
 965         }
 966
 967         if (lc->rtptf){
 968                 RtpTransport *artp=lc->rtptf->audio_rtp_func(lc->rtptf->audio_rtp_func_data, call->audio_port);
 969                 RtpTransport *artcp=lc->rtptf->audio_rtcp_func(lc->rtptf->audio_rtcp_func_data, call->audio_port+1);
 970                 rtp_session_set_transports(audiostream->session,artp,artcp);
 971         }
 972         if ((linphone_core_get_firewall_policy(lc) == LinphonePolicyUseIce) && (call->ice_session != NULL)){
 973                 rtp_session_set_pktinfo(audiostream->session, TRUE);
 974                 audiostream->ice_check_list = ice_session_check_list(call->ice_session, 0);
 975                 ice_check_list_set_rtp_session(audiostream->ice_check_list, audiostream->session);
 976         }
 977
 978         call->audiostream_app_evq = ortp_ev_queue_new();
 979         rtp_session_register_event_queue(audiostream->session,call->audiostream_app_evq);
 980 }
 981
 982 void linphone_call_init_video_stream(LinphoneCall *call){
 983 #ifdef VIDEO_ENABLED
 984         LinphoneCore *lc=call->core;
 985         SalMediaDescription *md=call->localdesc;
 986
 987         if ((lc->video_conf.display || lc->video_conf.capture) && md->streams[1].rtp_port>0){
 988                 int video_recv_buf_size=lp_config_get_int(lc->config,"video","recv_buf_size",0);
 989                 call->videostream=video_stream_new(md->streams[1].rtp_port,md->streams[1].rtcp_port,linphone_core_ipv6_enabled(lc));
 990                 video_stream_enable_display_filter_auto_rotate(call->videostream, lp_config_get_int(lc->config,"video","display_filter_auto_rotate",0));
 991                 if (video_recv_buf_size>0) rtp_session_set_recv_buf_size(call->videostream->session,video_recv_buf_size);
 992
 993                 if( lc->video_conf.displaytype != NULL)
 994                         video_stream_set_display_filter_name(call->videostream,lc->video_conf.displaytype);
 995                 video_stream_set_event_callback(call->videostream,video_stream_event_cb, call);
 996                 if (lc->rtptf){
 997                         RtpTransport *vrtp=lc->rtptf->video_rtp_func(lc->rtptf->video_rtp_func_data, call->video_port);
 998                         RtpTransport *vrtcp=lc->rtptf->video_rtcp_func(lc->rtptf->video_rtcp_func_data, call->video_port+1);
 999                         rtp_session_set_transports(call->videostream->session,vrtp,vrtcp);
1000                 }
1001                 if ((linphone_core_get_firewall_policy(lc) == LinphonePolicyUseIce) && (call->ice_session != NULL) && (ice_session_check_list(call->ice_session, 1))){
1002                         rtp_session_set_pktinfo(call->videostream->session, TRUE);
1003                         call->videostream->ice_check_list = ice_session_check_list(call->ice_session, 1);
1004                         ice_check_list_set_rtp_session(call->videostream->ice_check_list, call->videostream->session);
1005                 }
1006                 call->videostream_app_evq = ortp_ev_queue_new();
1007                 rtp_session_register_event_queue(call->videostream->session,call->videostream_app_evq);
1008 #ifdef TEST_EXT_RENDERER
1009                 video_stream_set_render_callback(call->videostream,rendercb,NULL);
1010 #endif
1011         }
1012 #else
1013         call->videostream=NULL;
1014 #endif
1015 }
1016
1017 void linphone_call_init_media_streams(LinphoneCall *call){
1018         linphone_call_init_audio_stream(call);
1019         linphone_call_init_video_stream(call);
1020 }
1021
1022
1023 static int dtmf_tab[16]={'0','1','2','3','4','5','6','7','8','9','*','#','A','B','C','D'};
1024
1025 static void linphone_core_dtmf_received(RtpSession* s, int dtmf, void* user_data){
1026         LinphoneCore* lc = (LinphoneCore*)user_data;
1027         if (dtmf<0 || dtmf>15){
1028                 ms_warning("Bad dtmf value %i",dtmf);
1029                 return;
1030         }
1031         if (lc->vtable.dtmf_received != NULL)
1032                 lc->vtable.dtmf_received(lc, linphone_core_get_current_call(lc), dtmf_tab[dtmf]);
1033 }
1034
1035 static void parametrize_equalizer(LinphoneCore *lc, AudioStream *st){
1036         if (st->equalizer){
1037                 MSFilter *f=st->equalizer;
1038                 int enabled=lp_config_get_int(lc->config,"sound","eq_active",0);
1039                 const char *gains=lp_config_get_string(lc->config,"sound","eq_gains",NULL);
1040                 ms_filter_call_method(f,MS_EQUALIZER_SET_ACTIVE,&enabled);
1041                 if (enabled){
1042                         if (gains){
1043                                 do{
1044                                         int bytes;
1045                                         MSEqualizerGain g;
1046                                         if (sscanf(gains,"%f:%f:%f %n",&g.frequency,&g.gain,&g.width,&bytes)==3){
1047                                                 ms_message("Read equalizer gains: %f(~%f) --> %f",g.frequency,g.width,g.gain);
1048                                                 ms_filter_call_method(f,MS_EQUALIZER_SET_GAIN,&g);
1049                                                 gains+=bytes;
1050                                         }else break;
1051                                 }while(1);
1052                         }
1053                 }
1054         }
1055 }
1056
1057 void _post_configure_audio_stream(AudioStream *st, LinphoneCore *lc, bool_t muted){
1058         float mic_gain=lp_config_get_float(lc->config,"sound","mic_gain",1);
1059         float thres = 0;
1060         float recv_gain;
1061         float ng_thres=lp_config_get_float(lc->config,"sound","ng_thres",0.05);
1062         float ng_floorgain=lp_config_get_float(lc->config,"sound","ng_floorgain",0);
1063         int dc_removal=lp_config_get_int(lc->config,"sound","dc_removal",0);
1064
1065         if (!muted)
1066                 audio_stream_set_mic_gain(st,mic_gain);
1067         else
1068                 audio_stream_set_mic_gain(st,0);
1069
1070         recv_gain = lc->sound_conf.soft_play_lev;
1071         if (recv_gain != 0) {
1072                 linphone_core_set_playback_gain_db (lc,recv_gain);
1073         }
1074
1075         if (st->volsend){
1076                 ms_filter_call_method(st->volsend,MS_VOLUME_REMOVE_DC,&dc_removal);
1077                 float speed=lp_config_get_float(lc->config,"sound","el_speed",-1);
1078                 thres=lp_config_get_float(lc->config,"sound","el_thres",-1);
1079                 float force=lp_config_get_float(lc->config,"sound","el_force",-1);
1080                 int sustain=lp_config_get_int(lc->config,"sound","el_sustain",-1);
1081                 float transmit_thres=lp_config_get_float(lc->config,"sound","el_transmit_thres",-1);
1082                 MSFilter *f=NULL;
1083                 f=st->volsend;
1084                 if (speed==-1) speed=0.03;
1085                 if (force==-1) force=25;
1086                 ms_filter_call_method(f,MS_VOLUME_SET_EA_SPEED,&speed);
1087                 ms_filter_call_method(f,MS_VOLUME_SET_EA_FORCE,&force);
1088                 if (thres!=-1)
1089                         ms_filter_call_method(f,MS_VOLUME_SET_EA_THRESHOLD,&thres);
1090                 if (sustain!=-1)
1091                         ms_filter_call_method(f,MS_VOLUME_SET_EA_SUSTAIN,&sustain);
1092                 if (transmit_thres!=-1)
1093                                 ms_filter_call_method(f,MS_VOLUME_SET_EA_TRANSMIT_THRESHOLD,&transmit_thres);
1094
1095                 ms_filter_call_method(st->volsend,MS_VOLUME_SET_NOISE_GATE_THRESHOLD,&ng_thres);
1096                 ms_filter_call_method(st->volsend,MS_VOLUME_SET_NOISE_GATE_FLOORGAIN,&ng_floorgain);
1097         }
1098         if (st->volrecv){
1099                 /* parameters for a limited noise-gate effect, using echo limiter threshold */
1100                 float floorgain = 1/mic_gain;
1101                 int spk_agc=lp_config_get_int(lc->config,"sound","speaker_agc_enabled",0);
1102                 ms_filter_call_method(st->volrecv, MS_VOLUME_ENABLE_AGC, &spk_agc);
1103                 ms_filter_call_method(st->volrecv,MS_VOLUME_SET_NOISE_GATE_THRESHOLD,&ng_thres);
1104                 ms_filter_call_method(st->volrecv,MS_VOLUME_SET_NOISE_GATE_FLOORGAIN,&floorgain);
1105         }
1106         parametrize_equalizer(lc,st);
1107 }
1108
1109 static void post_configure_audio_streams(LinphoneCall*call){
1110         AudioStream *st=call->audiostream;
1111         LinphoneCore *lc=call->core;
1112         _post_configure_audio_stream(st,lc,call->audio_muted);
1113         if (lc->vtable.dtmf_received!=NULL){
1114                 /* replace by our default action*/
1115                 audio_stream_play_received_dtmfs(call->audiostream,FALSE);
1116                 rtp_session_signal_connect(call->audiostream->session,"telephone-event",(RtpCallback)linphone_core_dtmf_received,(unsigned long)lc);
1117         }
1118 }
1119
1120 static RtpProfile *make_profile(LinphoneCall *call, const SalMediaDescription *md, const SalStreamDescription *desc, int *used_pt){
1121         int bw;
1122         const MSList *elem;
1123         RtpProfile *prof=rtp_profile_new("Call profile");
1124         bool_t first=TRUE;
1125         int remote_bw=0;
1126         LinphoneCore *lc=call->core;
1127         int up_ptime=0;
1128         *used_pt=-1;
1129
1130         for(elem=desc->payloads;elem!=NULL;elem=elem->next){
1131                 PayloadType *pt=(PayloadType*)elem->data;
1132                 int number;
1133
1134                 if ((pt->flags & PAYLOAD_TYPE_FLAG_CAN_SEND) && first) {
1135                         if (desc->type==SalAudio){
1136                                 linphone_core_update_allocated_audio_bandwidth_in_call(call,pt);
1137                                 up_ptime=linphone_core_get_upload_ptime(lc);
1138                         }
1139                         *used_pt=payload_type_get_number(pt);
1140                         first=FALSE;
1141                 }
1142                 if (desc->bandwidth>0) remote_bw=desc->bandwidth;
1143                 else if (md->bandwidth>0) {
1144                         /*case where b=AS is given globally, not per stream*/
1145                         remote_bw=md->bandwidth;
1146                         if (desc->type==SalVideo){
1147                                 remote_bw=get_video_bandwidth(remote_bw,call->audio_bw);
1148                         }
1149                 }
1150
1151                 if (desc->type==SalAudio){
1152                                 bw=get_min_bandwidth(call->audio_bw,remote_bw);
1153                 }else bw=get_min_bandwidth(get_video_bandwidth(linphone_core_get_upload_bandwidth (lc),call->audio_bw),remote_bw);
1154                 if (bw>0) pt->normal_bitrate=bw*1000;
1155                 else if (desc->type==SalAudio){
1156                         pt->normal_bitrate=-1;
1157                 }
1158                 if (desc->ptime>0){
1159                         up_ptime=desc->ptime;
1160                 }
1161                 if (up_ptime>0){
1162                         char tmp[40];
1163                         snprintf(tmp,sizeof(tmp),"ptime=%i",up_ptime);
1164                         payload_type_append_send_fmtp(pt,tmp);
1165                 }
1166                 number=payload_type_get_number(pt);
1167                 if (rtp_profile_get_payload(prof,number)!=NULL){
1168                         ms_warning("A payload type with number %i already exists in profile !",number);
1169                 }else
1170                         rtp_profile_set_payload(prof,number,pt);
1171         }
1172         return prof;
1173 }
1174
1175
1176 static void setup_ring_player(LinphoneCore *lc, LinphoneCall *call){
1177         int pause_time=3000;
1178         audio_stream_play(call->audiostream,lc->sound_conf.ringback_tone);
1179         ms_filter_call_method(call->audiostream->soundread,MS_FILE_PLAYER_LOOP,&pause_time);
1180 }
1181
1182 #define LINPHONE_RTCP_SDES_TOOL "Linphone-" LINPHONE_VERSION
1183
1184 static bool_t linphone_call_sound_resources_available(LinphoneCall *call){
1185         LinphoneCore *lc=call->core;
1186         LinphoneCall *current=linphone_core_get_current_call(lc);
1187         return !linphone_core_is_in_conference(lc) &&
1188                 (current==NULL || current==call);
1189 }
1190 static int find_crypto_index_from_tag(const SalSrtpCryptoAlgo crypto[],unsigned char tag) {
1191     int i;
1192     for(i=0; i<SAL_CRYPTO_ALGO_MAX; i++) {
1193         if (crypto[i].tag == tag) {
1194             return i;
1195         }
1196     }
1197     return -1;
1198 }
1199 static void linphone_call_start_audio_stream(LinphoneCall *call, const char *cname, bool_t muted, bool_t send_ringbacktone, bool_t use_arc){
1200         LinphoneCore *lc=call->core;
1201         int jitt_comp=lc->rtp_conf.audio_jitt_comp;
1202         int used_pt=-1;
1203         /* look for savp stream first */
1204         const SalStreamDescription *stream=sal_media_description_find_stream(call->resultdesc,
1205                                                 SalProtoRtpSavp,SalAudio);
1206         /* no savp audio stream, use avp */
1207         if (!stream)
1208                 stream=sal_media_description_find_stream(call->resultdesc,
1209                                                 SalProtoRtpAvp,SalAudio);
1210
1211         if (stream && stream->dir!=SalStreamInactive && stream->rtp_port!=0){
1212                 MSSndCard *playcard=lc->sound_conf.lsd_card ?
1213                         lc->sound_conf.lsd_card : lc->sound_conf.play_sndcard;
1214                 MSSndCard *captcard=lc->sound_conf.capt_sndcard;
1215                 const char *playfile=lc->play_file;
1216                 const char *recfile=lc->rec_file;
1217                 call->audio_profile=make_profile(call,call->resultdesc,stream,&used_pt);
1218                 bool_t use_ec;
1219
1220                 if (used_pt!=-1){
1221                         call->current_params.audio_codec = rtp_profile_get_payload(call->audio_profile, used_pt);
1222                         if (playcard==NULL) {
1223                                 ms_warning("No card defined for playback !");
1224                         }
1225                         if (captcard==NULL) {
1226                                 ms_warning("No card defined for capture !");
1227                         }
1228                         /*Replace soundcard filters by inactive file players or recorders
1229                          when placed in recvonly or sendonly mode*/
1230                         if (stream->rtp_port==0 || stream->dir==SalStreamRecvOnly){
1231                                 captcard=NULL;
1232                                 playfile=NULL;
1233                         }else if (stream->dir==SalStreamSendOnly){
1234                                 playcard=NULL;
1235                                 captcard=NULL;
1236                                 recfile=NULL;
1237                                 /*And we will eventually play "playfile" if set by the user*/
1238                                 /*playfile=NULL;*/
1239                         }
1240                         if (send_ringbacktone){
1241                                 captcard=NULL;
1242                                 playfile=NULL;/* it is setup later*/
1243                         }
1244                         /*if playfile are supplied don't use soundcards*/
1245                         if (lc->use_files) {
1246                                 captcard=NULL;
1247                                 playcard=NULL;
1248                         }
1249                         if (call->params.in_conference){
1250                                 /* first create the graph without soundcard resources*/
1251                                 captcard=playcard=NULL;
1252                         }
1253                         if (!linphone_call_sound_resources_available(call)){
1254                                 ms_message("Sound resources are used by another call, not using soundcard.");
1255                                 captcard=playcard=NULL;
1256                         }
1257                         use_ec=captcard==NULL ? FALSE : linphone_core_echo_cancellation_enabled(lc);
1258                         if (playcard &&  stream->max_rate>0) ms_snd_card_set_preferred_sample_rate(playcard, stream->max_rate);
1259                         if (captcard &&  stream->max_rate>0) ms_snd_card_set_preferred_sample_rate(captcard, stream->max_rate);
1260                         audio_stream_enable_adaptive_bitrate_control(call->audiostream,use_arc);
1261                         audio_stream_start_full(
1262                                 call->audiostream,
1263                                 call->audio_profile,
1264                                 stream->rtp_addr[0]!='\0' ? stream->rtp_addr : call->resultdesc->addr,
1265                                 stream->rtp_port,
1266                                 stream->rtcp_addr[0]!='\0' ? stream->rtcp_addr : call->resultdesc->addr,
1267                                 linphone_core_rtcp_enabled(lc) ? (stream->rtcp_port) : 0,
1268                                 used_pt,
1269                                 jitt_comp,
1270                                 playfile,
1271                                 recfile,
1272                                 playcard,
1273                                 captcard,
1274                                 use_ec
1275                                 );
1276                         post_configure_audio_streams(call);
1277                         if (muted && !send_ringbacktone){
1278                                 audio_stream_set_mic_gain(call->audiostream,0);
1279                         }
1280                         if (stream->dir==SalStreamSendOnly && playfile!=NULL){
1281                                 int pause_time=500;
1282                                 ms_filter_call_method(call->audiostream->soundread,MS_FILE_PLAYER_LOOP,&pause_time);
1283                         }
1284                         if (send_ringbacktone){
1285                                 setup_ring_player(lc,call);
1286                         }
1287                         audio_stream_set_rtcp_information(call->audiostream, cname, LINPHONE_RTCP_SDES_TOOL);
1288
1289             /* valid local tags are > 0 */
1290                         if (stream->proto == SalProtoRtpSavp) {
1291                 const SalStreamDescription *local_st_desc=sal_media_description_find_stream(call->localdesc,
1292                                                                                             SalProtoRtpSavp,SalAudio);
1293                 int crypto_idx = find_crypto_index_from_tag(local_st_desc->crypto, stream->crypto_local_tag);
1294
1295                 if (crypto_idx >= 0) {
1296                     audio_stream_enable_strp(
1297                                              call->audiostream,
1298                                              stream->crypto[0].algo,
1299                                              local_st_desc->crypto[crypto_idx].master_key,
1300                                              stream->crypto[0].master_key);
1301                     call->audiostream_encrypted=TRUE;
1302                 } else {
1303                     ms_warning("Failed to find local crypto algo with tag: %d", stream->crypto_local_tag);
1304                     call->audiostream_encrypted=FALSE;
1305                 }
1306                         }else call->audiostream_encrypted=FALSE;
1307                         if (call->params.in_conference){
1308                                 /*transform the graph to connect it to the conference filter */
1309                                 bool_t mute=stream->dir==SalStreamRecvOnly;
1310                                 linphone_call_add_to_conf(call, mute);
1311                         }
1312                         call->current_params.in_conference=call->params.in_conference;
1313                 }else ms_warning("No audio stream accepted ?");
1314         }
1315 }
1316
1317 static void linphone_call_start_video_stream(LinphoneCall *call, const char *cname,bool_t all_inputs_muted){
1318 #ifdef VIDEO_ENABLED
1319         LinphoneCore *lc=call->core;
1320         int used_pt=-1;
1321         /* look for savp stream first */
1322         const SalStreamDescription *vstream=sal_media_description_find_stream(call->resultdesc,
1323                                                 SalProtoRtpSavp,SalVideo);
1324         /* no savp audio stream, use avp */
1325         if (!vstream)
1326                 vstream=sal_media_description_find_stream(call->resultdesc,
1327                                                 SalProtoRtpAvp,SalVideo);
1328
1329         /* shutdown preview */
1330         if (lc->previewstream!=NULL) {
1331                 video_preview_stop(lc->previewstream);
1332                 lc->previewstream=NULL;
1333         }
1334
1335         if (vstream!=NULL && vstream->dir!=SalStreamInactive && vstream->rtp_port!=0) {
1336                 const char *rtp_addr=vstream->rtp_addr[0]!='\0' ? vstream->rtp_addr : call->resultdesc->addr;
1337                 const char *rtcp_addr=vstream->rtcp_addr[0]!='\0' ? vstream->rtcp_addr : call->resultdesc->addr;
1338                 call->video_profile=make_profile(call,call->resultdesc,vstream,&used_pt);
1339                 if (used_pt!=-1){
1340                         call->current_params.video_codec = rtp_profile_get_payload(call->video_profile, used_pt);
1341                         VideoStreamDir dir=VideoStreamSendRecv;
1342                         MSWebCam *cam=lc->video_conf.device;
1343                         bool_t is_inactive=FALSE;
1344
1345                         call->current_params.has_video=TRUE;
1346
1347                         video_stream_enable_adaptive_bitrate_control(call->videostream,
1348                                                                   linphone_core_adaptive_rate_control_enabled(lc));
1349                         video_stream_set_sent_video_size(call->videostream,linphone_core_get_preferred_video_size(lc));
1350                         video_stream_enable_self_view(call->videostream,lc->video_conf.selfview);
1351                         if (lc->video_window_id!=0)
1352                                 video_stream_set_native_window_id(call->videostream,lc->video_window_id);
1353                         if (lc->preview_window_id!=0)
1354                                 video_stream_set_native_preview_window_id (call->videostream,lc->preview_window_id);
1355                         video_stream_use_preview_video_window (call->videostream,lc->use_preview_window);
1356
1357                         if (vstream->dir==SalStreamSendOnly && lc->video_conf.capture ){
1358                                 cam=get_nowebcam_device();
1359                                 dir=VideoStreamSendOnly;
1360                         }else if (vstream->dir==SalStreamRecvOnly && lc->video_conf.display ){
1361                                 dir=VideoStreamRecvOnly;
1362                         }else if (vstream->dir==SalStreamSendRecv){
1363                                 if (lc->video_conf.display && lc->video_conf.capture)
1364                                         dir=VideoStreamSendRecv;
1365                                 else if (lc->video_conf.display)
1366                                         dir=VideoStreamRecvOnly;
1367                                 else
1368                                         dir=VideoStreamSendOnly;
1369                         }else{
1370                                 ms_warning("video stream is inactive.");
1371                                 /*either inactive or incompatible with local capabilities*/
1372                                 is_inactive=TRUE;
1373                         }
1374                         if (call->camera_active==FALSE || all_inputs_muted){
1375                                 cam=get_nowebcam_device();
1376                         }
1377                         if (!is_inactive){
1378                 call->log->video_enabled = TRUE;
1379                                 video_stream_set_direction (call->videostream, dir);
1380                                 ms_message("%s lc rotation:%d\n", __FUNCTION__, lc->device_rotation);
1381                                 video_stream_set_device_rotation(call->videostream, lc->device_rotation);
1382                                 video_stream_start(call->videostream,
1383                                         call->video_profile, rtp_addr, vstream->rtp_port,
1384                                         rtcp_addr, linphone_core_rtcp_enabled(lc) ? (vstream->rtcp_port) : 0,
1385                                         used_pt, lc->rtp_conf.audio_jitt_comp, cam);
1386                                 video_stream_set_rtcp_information(call->videostream, cname,LINPHONE_RTCP_SDES_TOOL);
1387                         }
1388
1389                         if (vstream->proto == SalProtoRtpSavp) {
1390                                 const SalStreamDescription *local_st_desc=sal_media_description_find_stream(call->localdesc,
1391                                                 SalProtoRtpSavp,SalVideo);
1392
1393                                 video_stream_enable_strp(
1394                                         call->videostream,
1395                                         vstream->crypto[0].algo,
1396                                         local_st_desc->crypto[0].master_key,
1397                                         vstream->crypto[0].master_key
1398                                         );
1399                                 call->videostream_encrypted=TRUE;
1400                         }else{
1401                                 call->videostream_encrypted=FALSE;
1402                         }
1403                 }else ms_warning("No video stream accepted.");
1404         }else{
1405                 ms_warning("No valid video stream defined.");
1406         }
1407 #endif
1408 }
1409
1410 void linphone_call_start_media_streams(LinphoneCall *call, bool_t all_inputs_muted, bool_t send_ringbacktone){
1411         LinphoneCore *lc=call->core;
1412
1413         call->current_params.audio_codec = NULL;
1414         call->current_params.video_codec = NULL;
1415
1416         LinphoneAddress *me=linphone_core_get_primary_contact_parsed(lc);
1417         char *cname;
1418         bool_t use_arc=linphone_core_adaptive_rate_control_enabled(lc);
1419 #ifdef VIDEO_ENABLED
1420         const SalStreamDescription *vstream=sal_media_description_find_stream(call->resultdesc,
1421                                                         SalProtoRtpAvp,SalVideo);
1422 #endif
1423
1424         if(call->audiostream == NULL)
1425         {
1426                 ms_fatal("start_media_stream() called without prior init !");
1427                 return;
1428         }
1429         cname=linphone_address_as_string_uri_only(me);
1430
1431 #if defined(VIDEO_ENABLED)
1432         if (vstream!=NULL && vstream->dir!=SalStreamInactive && vstream->payloads!=NULL){
1433                 /*when video is used, do not make adaptive rate control on audio, it is stupid.*/
1434                 use_arc=FALSE;
1435         }
1436 #endif
1437         linphone_call_start_audio_stream(call,cname,all_inputs_muted,send_ringbacktone,use_arc);
1438         call->current_params.has_video=FALSE;
1439         if (call->videostream!=NULL) {
1440                 linphone_call_start_video_stream(call,cname,all_inputs_muted);
1441         }
1442
1443         call->all_muted=all_inputs_muted;
1444         call->playing_ringbacktone=send_ringbacktone;
1445         call->up_bw=linphone_core_get_upload_bandwidth(lc);
1446
1447         if (call->params.media_encryption==LinphoneMediaEncryptionZRTP) {
1448                 OrtpZrtpParams params;
1449                 /*will be set later when zrtp is activated*/
1450                 call->current_params.media_encryption=LinphoneMediaEncryptionNone;
1451
1452                 params.zid_file=lc->zrtp_secrets_cache;
1453                 audio_stream_enable_zrtp(call->audiostream,&params);
1454         }else if (call->params.media_encryption==LinphoneMediaEncryptionSRTP){
1455                 call->current_params.media_encryption=linphone_call_are_all_streams_encrypted(call) ?
1456                         LinphoneMediaEncryptionSRTP : LinphoneMediaEncryptionNone;
1457         }
1458
1459         /*also reflect the change if the "wished" params, in order to avoid to propose SAVP or video again
1460          * further in the call, for example during pause,resume, conferencing reINVITEs*/
1461         linphone_call_fix_call_parameters(call);
1462         if ((call->ice_session != NULL) && (ice_session_state(call->ice_session) != IS_Completed)) {
1463                 ice_session_start_connectivity_checks(call->ice_session);
1464         }
1465
1466         goto end;
1467         end:
1468                 ms_free(cname);
1469                 linphone_address_destroy(me);
1470 }
1471
1472 void linphone_call_start_media_streams_for_ice_gathering(LinphoneCall *call){
1473         audio_stream_prepare_sound(call->audiostream, NULL, NULL);
1474         if (call->videostream) {
1475                 video_stream_prepare_video(call->videostream);
1476         }
1477 }
1478
1479 void linphone_call_delete_ice_session(LinphoneCall *call){
1480         if (call->ice_session != NULL) {
1481                 ice_session_destroy(call->ice_session);
1482                 call->ice_session = NULL;
1483                 if (call->audiostream != NULL) call->audiostream->ice_check_list = NULL;
1484                 if (call->videostream != NULL) call->videostream->ice_check_list = NULL;
1485         }
1486 }
1487
1488 static void linphone_call_log_fill_stats(LinphoneCallLog *log, AudioStream *st){
1489         audio_stream_get_local_rtp_stats (st,&log->local_stats);
1490         log->quality=audio_stream_get_average_quality_rating(st);
1491 }
1492
1493 void linphone_call_stop_media_streams(LinphoneCall *call){
1494         if (call->audiostream!=NULL) {
1495                 call->audiostream->ice_check_list = NULL;
1496                 rtp_session_unregister_event_queue(call->audiostream->session,call->audiostream_app_evq);
1497                 ortp_ev_queue_flush(call->audiostream_app_evq);
1498                 ortp_ev_queue_destroy(call->audiostream_app_evq);
1499                 call->audiostream_app_evq=NULL;
1500
1501                 if (call->audiostream->ec){
1502                         const char *state_str=NULL;
1503                         ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_GET_STATE_STRING,&state_str);
1504                         if (state_str){
1505                                 ms_message("Writing echo canceler state, %i bytes",(int)strlen(state_str));
1506                                 lp_config_set_string(call->core->config,"sound","ec_state",state_str);
1507                         }
1508                 }
1509                 linphone_call_log_fill_stats (call->log,call->audiostream);
1510                 if (call->endpoint){
1511                         linphone_call_remove_from_conf(call);
1512                 }
1513                 audio_stream_stop(call->audiostream);
1514                 call->audiostream=NULL;
1515         }
1516
1517
1518 #ifdef VIDEO_ENABLED
1519         if (call->videostream!=NULL){
1520                 call->videostream->ice_check_list = NULL;
1521                 rtp_session_unregister_event_queue(call->videostream->session,call->videostream_app_evq);
1522                 ortp_ev_queue_flush(call->videostream_app_evq);
1523                 ortp_ev_queue_destroy(call->videostream_app_evq);
1524                 call->videostream_app_evq=NULL;
1525                 video_stream_stop(call->videostream);
1526                 call->videostream=NULL;
1527         }
1528 #endif
1529         ms_event_queue_skip(call->core->msevq);
1530
1531         if (call->audio_profile){
1532                 rtp_profile_clear_all(call->audio_profile);
1533                 rtp_profile_destroy(call->audio_profile);
1534                 call->audio_profile=NULL;
1535         }
1536         if (call->video_profile){
1537                 rtp_profile_clear_all(call->video_profile);
1538                 rtp_profile_destroy(call->video_profile);
1539                 call->video_profile=NULL;
1540         }
1541 }
1542
1543
1544
1545 void linphone_call_enable_echo_cancellation(LinphoneCall *call, bool_t enable) {
1546         if (call!=NULL && call->audiostream!=NULL && call->audiostream->ec){
1547                 bool_t bypass_mode = !enable;
1548                 ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_SET_BYPASS_MODE,&bypass_mode);
1549         }
1550 }
1551 bool_t linphone_call_echo_cancellation_enabled(LinphoneCall *call) {
1552         if (call!=NULL && call->audiostream!=NULL && call->audiostream->ec){
1553                 bool_t val;
1554                 ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_GET_BYPASS_MODE,&val);
1555                 return !val;
1556         } else {
1557                 return linphone_core_echo_cancellation_enabled(call->core);
1558         }
1559 }
1560
1561 void linphone_call_enable_echo_limiter(LinphoneCall *call, bool_t val){
1562         if (call!=NULL && call->audiostream!=NULL ) {
1563                 if (val) {
1564                 const char *type=lp_config_get_string(call->core->config,"sound","el_type","mic");
1565                 if (strcasecmp(type,"mic")==0)
1566                         audio_stream_enable_echo_limiter(call->audiostream,ELControlMic);
1567                 else if (strcasecmp(type,"full")==0)
1568                         audio_stream_enable_echo_limiter(call->audiostream,ELControlFull);
1569                 } else {
1570                         audio_stream_enable_echo_limiter(call->audiostream,ELInactive);
1571                 }
1572         }
1573 }
1574
1575 bool_t linphone_call_echo_limiter_enabled(const LinphoneCall *call){
1576         if (call!=NULL && call->audiostream!=NULL ){
1577                 return call->audiostream->el_type !=ELInactive ;
1578         } else {
1579                 return linphone_core_echo_limiter_enabled(call->core);
1580         }
1581 }
1582
1583 /**
1584  * @addtogroup call_misc
1585  * @{
1586 **/
1587
1588 /**
1589  * Returns the measured sound volume played locally (received from remote).
1590  * It is expressed in dbm0.
1591 **/
1592 float linphone_call_get_play_volume(LinphoneCall *call){
1593         AudioStream *st=call->audiostream;
1594         if (st && st->volrecv){
1595                 float vol=0;
1596                 ms_filter_call_method(st->volrecv,MS_VOLUME_GET,&vol);
1597                 return vol;
1598
1599         }
1600         return LINPHONE_VOLUME_DB_LOWEST;
1601 }
1602
1603 /**
1604  * Returns the measured sound volume recorded locally (sent to remote).
1605  * It is expressed in dbm0.
1606 **/
1607 float linphone_call_get_record_volume(LinphoneCall *call){
1608         AudioStream *st=call->audiostream;
1609         if (st && st->volsend && !call->audio_muted && call->state==LinphoneCallStreamsRunning){
1610                 float vol=0;
1611                 ms_filter_call_method(st->volsend,MS_VOLUME_GET,&vol);
1612                 return vol;
1613
1614         }
1615         return LINPHONE_VOLUME_DB_LOWEST;
1616 }
1617
1618 /**
1619  * Obtain real-time quality rating of the call
1620  *
1621  * Based on local RTP statistics and RTCP feedback, a quality rating is computed and updated
1622  * during all the duration of the call. This function returns its value at the time of the function call.
1623  * It is expected that the rating is updated at least every 5 seconds or so.
1624  * The rating is a floating point number comprised between 0 and 5.
1625  *
1626  * 4-5 = good quality <br>
1627  * 3-4 = average quality <br>
1628  * 2-3 = poor quality <br>
1629  * 1-2 = very poor quality <br>
1630  * 0-1 = can't be worse, mostly unusable <br>
1631  *
1632  * @returns The function returns -1 if no quality measurement is available, for example if no
1633  * active audio stream exist. Otherwise it returns the quality rating.
1634 **/
1635 float linphone_call_get_current_quality(LinphoneCall *call){
1636         if (call->audiostream){
1637                 return audio_stream_get_quality_rating(call->audiostream);
1638         }
1639         return -1;
1640 }
1641
1642 /**
1643  * Returns call quality averaged over all the duration of the call.
1644  *
1645  * See linphone_call_get_current_quality() for more details about quality measurement.
1646 **/
1647 float linphone_call_get_average_quality(LinphoneCall *call){
1648         if (call->audiostream){
1649                 return audio_stream_get_average_quality_rating(call->audiostream);
1650         }
1651         return -1;
1652 }
1653
1654 /**
1655  * Access last known statistics for audio stream, for a given call.
1656 **/
1657 const LinphoneCallStats *linphone_call_get_audio_stats(const LinphoneCall *call) {
1658         return &call->stats[LINPHONE_CALL_STATS_AUDIO];
1659 }
1660
1661 /**
1662  * Access last known statistics for video stream, for a given call.
1663 **/
1664 const LinphoneCallStats *linphone_call_get_video_stats(const LinphoneCall *call) {
1665         return &call->stats[LINPHONE_CALL_STATS_VIDEO];
1666 }
1667
1668
1669 /**
1670  * @}
1671 **/
1672
1673 static void display_bandwidth(RtpSession *as, RtpSession *vs){
1674         ms_message("bandwidth usage: audio=[d=%.1f,u=%.1f] video=[d=%.1f,u=%.1f] kbit/sec",
1675         (as!=NULL) ? (rtp_session_compute_recv_bandwidth(as)*1e-3) : 0,
1676         (as!=NULL) ? (rtp_session_compute_send_bandwidth(as)*1e-3) : 0,
1677         (vs!=NULL) ? (rtp_session_compute_recv_bandwidth(vs)*1e-3) : 0,
1678         (vs!=NULL) ? (rtp_session_compute_send_bandwidth(vs)*1e-3) : 0);
1679 }
1680
1681 static void linphone_core_disconnected(LinphoneCore *lc, LinphoneCall *call){
1682         char temp[256];
1683         char *from=NULL;
1684         if(call)
1685                 from = linphone_call_get_remote_address_as_string(call);
1686         if (from)
1687         {
1688                 snprintf(temp,sizeof(temp),"Remote end %s seems to have disconnected, the call is going to be closed.",from);
1689                 free(from);
1690         }
1691         else
1692         {
1693                 snprintf(temp,sizeof(temp),"Remote end seems to have disconnected, the call is going to be closed.");
1694         }
1695         if (lc->vtable.display_warning!=NULL)
1696                 lc->vtable.display_warning(lc,temp);
1697         linphone_core_terminate_call(lc,call);
1698 }
1699
1700 static void handle_ice_events(LinphoneCall *call, OrtpEvent *ev){
1701         OrtpEventType evt=ortp_event_get_type(ev);
1702         OrtpEventData *evd=ortp_event_get_data(ev);
1703
1704         if (evt == ORTP_EVENT_ICE_SESSION_PROCESSING_FINISHED) {
1705                 switch (ice_session_state(call->ice_session)) {
1706                         case IS_Completed:
1707                                 if (ice_session_role(call->ice_session) == IR_Controlling) {
1708                                         ice_session_select_candidates(call->ice_session);
1709                                         linphone_core_update_call(call->core, call, &call->current_params);
1710                                 }
1711                                 break;
1712                         case IS_Failed:
1713                                 linphone_call_delete_ice_session(call);
1714                                 break;
1715                         default:
1716                                 break;
1717                 }
1718         } else if (evt == ORTP_EVENT_ICE_GATHERING_FINISHED) {
1719                 if (evd->info.ice_processing_successful==TRUE) {
1720                         ice_session_compute_candidates_foundations(call->ice_session);
1721                         ice_session_eliminate_redundant_candidates(call->ice_session);
1722                         ice_session_choose_default_candidates(call->ice_session);
1723                 } else {
1724                         linphone_call_delete_ice_session(call);
1725                 }
1726                 switch (call->state) {
1727                         case LinphoneCallStreamsRunning:
1728                                 linphone_core_start_update_call(call->core, call);
1729                                 break;
1730                         case LinphoneCallUpdatedByRemote:
1731                                 linphone_core_start_accept_call_update(call->core, call);
1732                                 break;
1733                         case LinphoneCallOutgoingInit:
1734                                 linphone_call_stop_media_streams(call);
1735                                 linphone_core_proceed_with_invite_if_ready(call->core, call, NULL);
1736                                 break;
1737                         default:
1738                                 linphone_call_stop_media_streams(call);
1739                                 linphone_core_notify_incoming_call(call->core, call);
1740                                 break;
1741                 }
1742         } else if (evt == ORTP_EVENT_ICE_LOSING_PAIRS_COMPLETED) {
1743                 linphone_core_start_accept_call_update(call->core, call);
1744         } else if (evt == ORTP_EVENT_ICE_RESTART_NEEDED) {
1745                 ice_session_restart(call->ice_session);
1746                 ice_session_set_role(call->ice_session, IR_Controlling);
1747                 linphone_core_update_call(call->core, call, &call->current_params);
1748         }
1749 }
1750
1751 void linphone_call_background_tasks(LinphoneCall *call, bool_t one_second_elapsed){
1752         LinphoneCore* lc = call->core;
1753         int disconnect_timeout = linphone_core_get_nortp_timeout(call->core);
1754         bool_t disconnected=FALSE;
1755
1756         if (call->state==LinphoneCallStreamsRunning && one_second_elapsed){
1757                 RtpSession *as=NULL,*vs=NULL;
1758                 float audio_load=0, video_load=0;
1759                 if (call->audiostream!=NULL){
1760                         as=call->audiostream->session;
1761                         if (call->audiostream->ticker)
1762                                 audio_load=ms_ticker_get_average_load(call->audiostream->ticker);
1763                 }
1764                 if (call->videostream!=NULL){
1765                         if (call->videostream->ticker)
1766                                 video_load=ms_ticker_get_average_load(call->videostream->ticker);
1767                         vs=call->videostream->session;
1768                 }
1769                 display_bandwidth(as,vs);
1770                 ms_message("Thread processing load: audio=%f\tvideo=%f",audio_load,video_load);
1771         }
1772 #ifdef VIDEO_ENABLED
1773         if (call->videostream!=NULL) {
1774                 OrtpEvent *ev;
1775
1776                 /* Ensure there is no dangling ICE check list. */
1777                 if (call->ice_session == NULL) call->videostream->ice_check_list = NULL;
1778
1779                 // Beware that the application queue should not depend on treatments fron the
1780                 // mediastreamer queue.
1781                 video_stream_iterate(call->videostream);
1782
1783                 while (call->videostream_app_evq && (NULL != (ev=ortp_ev_queue_get(call->videostream_app_evq)))){
1784                         OrtpEventType evt=ortp_event_get_type(ev);
1785                         OrtpEventData *evd=ortp_event_get_data(ev);
1786                         if (evt == ORTP_EVENT_ZRTP_ENCRYPTION_CHANGED){
1787                                 linphone_call_videostream_encryption_changed(call, evd->info.zrtp_stream_encrypted);
1788                         } else if (evt == ORTP_EVENT_RTCP_PACKET_RECEIVED) {
1789                                 call->stats[LINPHONE_CALL_STATS_VIDEO].round_trip_delay = rtp_session_get_round_trip_propagation(call->videostream->session);
1790                                 if(call->stats[LINPHONE_CALL_STATS_VIDEO].received_rtcp != NULL)
1791                                         freemsg(call->stats[LINPHONE_CALL_STATS_VIDEO].received_rtcp);
1792                                 call->stats[LINPHONE_CALL_STATS_VIDEO].received_rtcp = evd->packet;
1793                                 evd->packet = NULL;
1794                                 if (lc->vtable.call_stats_updated)
1795                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_VIDEO]);
1796                         } else if (evt == ORTP_EVENT_RTCP_PACKET_EMITTED) {
1797                                 memcpy(&call->stats[LINPHONE_CALL_STATS_VIDEO].jitter_stats, rtp_session_get_jitter_stats(call->videostream->session), sizeof(jitter_stats_t));
1798                                 if(call->stats[LINPHONE_CALL_STATS_VIDEO].sent_rtcp != NULL)
1799                                         freemsg(call->stats[LINPHONE_CALL_STATS_VIDEO].sent_rtcp);
1800                                 call->stats[LINPHONE_CALL_STATS_VIDEO].sent_rtcp = evd->packet;
1801                                 evd->packet = NULL;
1802                                 if (lc->vtable.call_stats_updated)
1803                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_VIDEO]);
1804                         } else if ((evt == ORTP_EVENT_ICE_SESSION_PROCESSING_FINISHED) || (evt == ORTP_EVENT_ICE_GATHERING_FINISHED)
1805                                 || (evt == ORTP_EVENT_ICE_LOSING_PAIRS_COMPLETED) || (evt == ORTP_EVENT_ICE_RESTART_NEEDED)) {
1806                                 handle_ice_events(call, ev);
1807                         }
1808                         ortp_event_destroy(ev);
1809                 }
1810         }
1811 #endif
1812         if (call->audiostream!=NULL) {
1813                 OrtpEvent *ev;
1814
1815                 /* Ensure there is no dangling ICE check list. */
1816                 if (call->ice_session == NULL) call->audiostream->ice_check_list = NULL;
1817
1818                 // Beware that the application queue should not depend on treatments fron the
1819                 // mediastreamer queue.
1820                 audio_stream_iterate(call->audiostream);
1821
1822                 while (call->audiostream_app_evq && (NULL != (ev=ortp_ev_queue_get(call->audiostream_app_evq)))){
1823                         OrtpEventType evt=ortp_event_get_type(ev);
1824                         OrtpEventData *evd=ortp_event_get_data(ev);
1825                         if (evt == ORTP_EVENT_ZRTP_ENCRYPTION_CHANGED){
1826                                 linphone_call_audiostream_encryption_changed(call, evd->info.zrtp_stream_encrypted);
1827                         } else if (evt == ORTP_EVENT_ZRTP_SAS_READY) {
1828                                 linphone_call_audiostream_auth_token_ready(call, evd->info.zrtp_sas.sas, evd->info.zrtp_sas.verified);
1829                         } else if (evt == ORTP_EVENT_RTCP_PACKET_RECEIVED) {
1830                                 call->stats[LINPHONE_CALL_STATS_AUDIO].round_trip_delay = rtp_session_get_round_trip_propagation(call->audiostream->session);
1831                                 if(call->stats[LINPHONE_CALL_STATS_AUDIO].received_rtcp != NULL)
1832                                         freemsg(call->stats[LINPHONE_CALL_STATS_AUDIO].received_rtcp);
1833                                 call->stats[LINPHONE_CALL_STATS_AUDIO].received_rtcp = evd->packet;
1834                                 evd->packet = NULL;
1835                                 if (lc->vtable.call_stats_updated)
1836                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_AUDIO]);
1837                         } else if (evt == ORTP_EVENT_RTCP_PACKET_EMITTED) {
1838                                 memcpy(&call->stats[LINPHONE_CALL_STATS_AUDIO].jitter_stats, rtp_session_get_jitter_stats(call->audiostream->session), sizeof(jitter_stats_t));
1839                                 if(call->stats[LINPHONE_CALL_STATS_AUDIO].sent_rtcp != NULL)
1840                                         freemsg(call->stats[LINPHONE_CALL_STATS_AUDIO].sent_rtcp);
1841                                 call->stats[LINPHONE_CALL_STATS_AUDIO].sent_rtcp = evd->packet;
1842                                 evd->packet = NULL;
1843                                 if (lc->vtable.call_stats_updated)
1844                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_AUDIO]);
1845                         } else if ((evt == ORTP_EVENT_ICE_SESSION_PROCESSING_FINISHED) || (evt == ORTP_EVENT_ICE_GATHERING_FINISHED)
1846                                 || (evt == ORTP_EVENT_ICE_LOSING_PAIRS_COMPLETED) || (evt == ORTP_EVENT_ICE_RESTART_NEEDED)) {
1847                                 handle_ice_events(call, ev);
1848                         }
1849                         ortp_event_destroy(ev);
1850                 }
1851         }
1852         if (call->state==LinphoneCallStreamsRunning && one_second_elapsed && call->audiostream!=NULL && disconnect_timeout>0 )
1853                 disconnected=!audio_stream_alive(call->audiostream,disconnect_timeout);
1854         if (disconnected)
1855                 linphone_core_disconnected(call->core,call);
1856 }
1857
1858 void linphone_call_log_completed(LinphoneCall *call){
1859         LinphoneCore *lc=call->core;
1860
1861         call->log->duration=time(NULL)-call->start_time;
1862
1863         if (call->log->status==LinphoneCallMissed){
1864                 char *info;
1865                 lc->missed_calls++;
1866                 info=ortp_strdup_printf(ngettext("You have missed %i call.",
1867                                          "You have missed %i calls.", lc->missed_calls),
1868                                 lc->missed_calls);
1869         if (lc->vtable.display_status!=NULL)
1870             lc->vtable.display_status(lc,info);
1871                 ms_free(info);
1872         }
1873         lc->call_logs=ms_list_prepend(lc->call_logs,(void *)call->log);
1874         if (ms_list_size(lc->call_logs)>lc->max_call_logs){
1875                 MSList *elem,*prevelem=NULL;
1876                 /*find the last element*/
1877                 for(elem=lc->call_logs;elem!=NULL;elem=elem->next){
1878                         prevelem=elem;
1879                 }
1880                 elem=prevelem;
1881                 linphone_call_log_destroy((LinphoneCallLog*)elem->data);
1882                 lc->call_logs=ms_list_remove_link(lc->call_logs,elem);
1883         }
1884         if (lc->vtable.call_log_updated!=NULL){
1885                 lc->vtable.call_log_updated(lc,call->log);
1886         }
1887         call_logs_write_to_config_file(lc);
1888 }
1889
1890 LinphoneCallState linphone_call_get_transfer_state(LinphoneCall *call) {
1891         return call->transfer_state;
1892 }
1893
1894 void linphone_call_set_transfer_state(LinphoneCall* call, LinphoneCallState state) {
1895         if (state != call->transfer_state) {
1896                 LinphoneCore* lc = call->core;
1897                 call->transfer_state = state;
1898                 if (lc->vtable.transfer_state_changed)
1899                         lc->vtable.transfer_state_changed(lc, call, state);
1900         }
1901 }
1902