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 static void update_sal_media_description_from_params(SalMediaDescription *md, const LinphoneCallParams *params){
 337         if (params->down_bw)
 338                 md->bandwidth=params->down_bw;
 339         if (params->down_ptime)
 340                 md->streams[0].ptime=params->down_ptime;
 341 }
 342
 343 LinphoneCall * linphone_call_new_outgoing(struct _LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, const LinphoneCallParams *params)
 344 {
 345         LinphoneCall *call=ms_new0(LinphoneCall,1);
 346         int ping_time=-1;
 347         call->dir=LinphoneCallOutgoing;
 348         call->op=sal_op_new(lc->sal);
 349         sal_op_set_user_pointer(call->op,call);
 350         call->core=lc;
 351         linphone_core_get_local_ip(lc,linphone_address_get_domain(to),call->localip);
 352         linphone_call_init_common(call,from,to);
 353         call->params=*params;
 354         if (linphone_core_get_firewall_policy(call->core) == LinphonePolicyUseIce) {
 355                 call->ice_session = ice_session_new();
 356                 ice_session_set_role(call->ice_session, IR_Controlling);
 357         }
 358         call->localdesc=create_local_media_description (lc,call);
 359         call->camera_active=params->has_video;
 360         if (linphone_core_get_firewall_policy(call->core) == LinphonePolicyUseStun) {
 361                 ping_time=linphone_core_run_stun_tests(call->core,call);
 362         }
 363         if (ping_time>=0) {
 364                 linphone_core_adapt_to_network(lc,ping_time,&call->params);
 365                 update_sal_media_description_from_params(call->localdesc,&call->params);
 366         }
 367         discover_mtu(lc,linphone_address_get_domain (to));
 368         if (params->referer){
 369                 sal_call_set_referer(call->op,params->referer->op);
 370                 call->referer=linphone_call_ref(params->referer);
 371         }
 372         return call;
 373 }
 374
 375 LinphoneCall * linphone_call_new_incoming(LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, SalOp *op){
 376         LinphoneCall *call=ms_new0(LinphoneCall,1);
 377         char *from_str;
 378         int ping_time=-1;
 379
 380         call->dir=LinphoneCallIncoming;
 381         sal_op_set_user_pointer(op,call);
 382         call->op=op;
 383         call->core=lc;
 384
 385         if (lc->sip_conf.ping_with_options){
 386                 /*the following sends an option request back to the caller so that
 387                  we get a chance to discover our nat'd address before answering.*/
 388                 call->ping_op=sal_op_new(lc->sal);
 389                 from_str=linphone_address_as_string_uri_only(from);
 390                 sal_op_set_route(call->ping_op,sal_op_get_network_origin(op));
 391                 sal_op_set_user_pointer(call->ping_op,call);
 392                 sal_ping(call->ping_op,linphone_core_find_best_identity(lc,from,NULL),from_str);
 393                 ms_free(from_str);
 394         }
 395
 396         linphone_address_clean(from);
 397         linphone_core_get_local_ip(lc,linphone_address_get_domain(from),call->localip);
 398         linphone_call_init_common(call, from, to);
 399         linphone_core_init_default_params(lc, &call->params);
 400         call->params.has_video &= !!lc->video_policy.automatically_accept;
 401         call->localdesc=create_local_media_description(lc,call);
 402         call->camera_active=call->params.has_video;
 403         switch (linphone_core_get_firewall_policy(call->core)) {
 404                 case LinphonePolicyUseIce:
 405                         call->ice_session = ice_session_new();
 406                         ice_session_set_role(call->ice_session, IR_Controlled);
 407                         linphone_core_update_ice_from_remote_media_description(call, sal_call_get_remote_media_description(op));
 408                         if (call->ice_session != NULL) {
 409                                 linphone_call_init_media_streams(call);
 410                                 linphone_call_start_media_streams_for_ice_gathering(call);
 411                                 if (linphone_core_gather_ice_candidates(call->core,call)<0) {
 412                                         /* Ice candidates gathering failed, proceed with the call anyway. */
 413                                         linphone_call_delete_ice_session(call);
 414                                         linphone_call_stop_media_streams(call);
 415                                 }
 416                         }
 417                         break;
 418                 case LinphonePolicyUseStun:
 419                         ping_time=linphone_core_run_stun_tests(call->core,call);
 420                         /* No break to also destroy ice session in this case. */
 421                 default:
 422                         break;
 423         }
 424         if (ping_time>=0) {
 425                 linphone_core_adapt_to_network(lc,ping_time,&call->params);
 426                 update_sal_media_description_from_params(call->localdesc,&call->params);
 427         };
 428         discover_mtu(lc,linphone_address_get_domain(from));
 429         return call;
 430 }
 431
 432 /* this function is called internally to get rid of a call.
 433  It performs the following tasks:
 434  - remove the call from the internal list of calls
 435  - update the call logs accordingly
 436 */
 437
 438 static void linphone_call_set_terminated(LinphoneCall *call){
 439         LinphoneCore *lc=call->core;
 440
 441         linphone_core_update_allocated_audio_bandwidth(lc);
 442
 443         call->owns_call_log=FALSE;
 444         linphone_call_log_completed(call);
 445
 446
 447         if (call == lc->current_call){
 448                 ms_message("Resetting the current call");
 449                 lc->current_call=NULL;
 450         }
 451
 452         if (linphone_core_del_call(lc,call) != 0){
 453                 ms_error("Could not remove the call from the list !!!");
 454         }
 455
 456         if (ms_list_size(lc->calls)==0)
 457                 linphone_core_notify_all_friends(lc,lc->presence_mode);
 458
 459         linphone_core_conference_check_uninit(lc);
 460         if (call->ringing_beep){
 461                 linphone_core_stop_dtmf(lc);
 462                 call->ringing_beep=FALSE;
 463         }
 464         if (call->referer){
 465                 linphone_call_unref(call->referer);
 466                 call->referer=NULL;
 467         }
 468 }
 469
 470 void linphone_call_fix_call_parameters(LinphoneCall *call){
 471         call->params.has_video=call->current_params.has_video;
 472         call->params.media_encryption=call->current_params.media_encryption;
 473 }
 474
 475 const char *linphone_call_state_to_string(LinphoneCallState cs){
 476         switch (cs){
 477                 case LinphoneCallIdle:
 478                         return "LinphoneCallIdle";
 479                 case LinphoneCallIncomingReceived:
 480                         return "LinphoneCallIncomingReceived";
 481                 case LinphoneCallOutgoingInit:
 482                         return "LinphoneCallOutgoingInit";
 483                 case LinphoneCallOutgoingProgress:
 484                         return "LinphoneCallOutgoingProgress";
 485                 case LinphoneCallOutgoingRinging:
 486                         return "LinphoneCallOutgoingRinging";
 487                 case LinphoneCallOutgoingEarlyMedia:
 488                         return "LinphoneCallOutgoingEarlyMedia";
 489                 case LinphoneCallConnected:
 490                         return "LinphoneCallConnected";
 491                 case LinphoneCallStreamsRunning:
 492                         return "LinphoneCallStreamsRunning";
 493                 case LinphoneCallPausing:
 494                         return "LinphoneCallPausing";
 495                 case LinphoneCallPaused:
 496                         return "LinphoneCallPaused";
 497                 case LinphoneCallResuming:
 498                         return "LinphoneCallResuming";
 499                 case LinphoneCallRefered:
 500                         return "LinphoneCallRefered";
 501                 case LinphoneCallError:
 502                         return "LinphoneCallError";
 503                 case LinphoneCallEnd:
 504                         return "LinphoneCallEnd";
 505                 case LinphoneCallPausedByRemote:
 506                         return "LinphoneCallPausedByRemote";
 507                 case LinphoneCallUpdatedByRemote:
 508                         return "LinphoneCallUpdatedByRemote";
 509                 case LinphoneCallIncomingEarlyMedia:
 510                         return "LinphoneCallIncomingEarlyMedia";
 511                 case LinphoneCallUpdated:
 512                         return "LinphoneCallUpdated";
 513                 case LinphoneCallReleased:
 514                         return "LinphoneCallReleased";
 515         }
 516         return "undefined state";
 517 }
 518
 519 void linphone_call_set_state(LinphoneCall *call, LinphoneCallState cstate, const char *message){
 520         LinphoneCore *lc=call->core;
 521
 522         if (call->state!=cstate){
 523                 if (call->state==LinphoneCallEnd || call->state==LinphoneCallError){
 524                         if (cstate!=LinphoneCallReleased){
 525                                 ms_warning("Spurious call state change from %s to %s, ignored.",linphone_call_state_to_string(call->state),
 526                                    linphone_call_state_to_string(cstate));
 527                                 return;
 528                         }
 529                 }
 530                 ms_message("Call %p: moving from state %s to %s",call,linphone_call_state_to_string(call->state),
 531                            linphone_call_state_to_string(cstate));
 532                 if (cstate!=LinphoneCallRefered){
 533                         /*LinphoneCallRefered is rather an event, not a state.
 534                          Indeed it does not change the state of the call (still paused or running)*/
 535                         call->state=cstate;
 536                 }
 537                 if (cstate==LinphoneCallEnd || cstate==LinphoneCallError){
 538                         switch(call->reason){
 539                                 case LinphoneReasonDeclined:
 540                                         call->log->status=LinphoneCallDeclined;
 541                                         break;
 542                                 case LinphoneReasonNotAnswered:
 543                                         call->log->status=LinphoneCallMissed;
 544                                 break;
 545                                 default:
 546                                 break;
 547                         }
 548                         linphone_call_set_terminated (call);
 549                 }
 550                 if (cstate == LinphoneCallConnected) {
 551                         call->log->status=LinphoneCallSuccess;
 552                         call->media_start_time=time(NULL);
 553                 }
 554
 555                 if (lc->vtable.call_state_changed)
 556                         lc->vtable.call_state_changed(lc,call,cstate,message);
 557                 if (cstate==LinphoneCallReleased){
 558                         if (call->op!=NULL) {
 559                                 /* so that we cannot have anymore upcalls for SAL
 560                                  concerning this call*/
 561                                 sal_op_release(call->op);
 562                                 call->op=NULL;
 563                         }
 564                         linphone_call_unref(call);
 565                 }
 566         }
 567 }
 568
 569 static void linphone_call_destroy(LinphoneCall *obj)
 570 {
 571         if (obj->op!=NULL) {
 572                 sal_op_release(obj->op);
 573                 obj->op=NULL;
 574         }
 575         if (obj->resultdesc!=NULL) {
 576                 sal_media_description_unref(obj->resultdesc);
 577                 obj->resultdesc=NULL;
 578         }
 579         if (obj->localdesc!=NULL) {
 580                 sal_media_description_unref(obj->localdesc);
 581                 obj->localdesc=NULL;
 582         }
 583         if (obj->ping_op) {
 584                 sal_op_release(obj->ping_op);
 585         }
 586         if (obj->refer_to){
 587                 ms_free(obj->refer_to);
 588         }
 589         if (obj->owns_call_log)
 590                 linphone_call_log_destroy(obj->log);
 591         if (obj->auth_token) {
 592                 ms_free(obj->auth_token);
 593         }
 594         if (obj->ice_session) {
 595                 ice_session_destroy(obj->ice_session);
 596         }
 597
 598         ms_free(obj);
 599 }
 600
 601 /**
 602  * @addtogroup call_control
 603  * @{
 604 **/
 605
 606 /**
 607  * Increments the call 's reference count.
 608  * An application that wishes to retain a pointer to call object
 609  * must use this function to unsure the pointer remains
 610  * valid. Once the application no more needs this pointer,
 611  * it must call linphone_call_unref().
 612 **/
 613 LinphoneCall * linphone_call_ref(LinphoneCall *obj){
 614         obj->refcnt++;
 615         return obj;
 616 }
 617
 618 /**
 619  * Decrements the call object reference count.
 620  * See linphone_call_ref().
 621 **/
 622 void linphone_call_unref(LinphoneCall *obj){
 623         obj->refcnt--;
 624         if (obj->refcnt==0){
 625                 linphone_call_destroy(obj);
 626         }
 627 }
 628
 629 /**
 630  * Returns current parameters associated to the call.
 631 **/
 632 const LinphoneCallParams * linphone_call_get_current_params(const LinphoneCall *call){
 633         return &call->current_params;
 634 }
 635
 636 static bool_t is_video_active(const SalStreamDescription *sd){
 637         return sd->rtp_port!=0 && sd->dir!=SalStreamInactive;
 638 }
 639
 640 /**
 641  * Returns call parameters proposed by remote.
 642  *
 643  * This is useful when receiving an incoming call, to know whether the remote party
 644  * supports video, encryption or whatever.
 645 **/
 646 const LinphoneCallParams * linphone_call_get_remote_params(LinphoneCall *call){
 647         LinphoneCallParams *cp=&call->remote_params;
 648         memset(cp,0,sizeof(*cp));
 649         if (call->op){
 650                 SalMediaDescription *md=sal_call_get_remote_media_description(call->op);
 651                 if (md){
 652                         SalStreamDescription *asd,*vsd,*secure_asd,*secure_vsd;
 653
 654                         asd=sal_media_description_find_stream(md,SalProtoRtpAvp,SalAudio);
 655                         vsd=sal_media_description_find_stream(md,SalProtoRtpAvp,SalVideo);
 656                         secure_asd=sal_media_description_find_stream(md,SalProtoRtpSavp,SalAudio);
 657                         secure_vsd=sal_media_description_find_stream(md,SalProtoRtpSavp,SalVideo);
 658                         if (secure_vsd){
 659                                 cp->has_video=is_video_active(secure_vsd);
 660                                 if (secure_asd || asd==NULL)
 661                                         cp->media_encryption=LinphoneMediaEncryptionSRTP;
 662                         }else if (vsd){
 663                                 cp->has_video=is_video_active(vsd);
 664                         }
 665                         return cp;
 666                 }
 667         }
 668         return NULL;
 669 }
 670
 671 /**
 672  * Returns the remote address associated to this call
 673  *
 674 **/
 675 const LinphoneAddress * linphone_call_get_remote_address(const LinphoneCall *call){
 676         return call->dir==LinphoneCallIncoming ? call->log->from : call->log->to;
 677 }
 678
 679 /**
 680  * Returns the remote address associated to this call as a string.
 681  *
 682  * The result string must be freed by user using ms_free().
 683 **/
 684 char *linphone_call_get_remote_address_as_string(const LinphoneCall *call){
 685         return linphone_address_as_string(linphone_call_get_remote_address(call));
 686 }
 687
 688 /**
 689  * Retrieves the call's current state.
 690 **/
 691 LinphoneCallState linphone_call_get_state(const LinphoneCall *call){
 692         return call->state;
 693 }
 694
 695 /**
 696  * Returns the reason for a call termination (either error or normal termination)
 697 **/
 698 LinphoneReason linphone_call_get_reason(const LinphoneCall *call){
 699         return call->reason;
 700 }
 701
 702 /**
 703  * Get the user_pointer in the LinphoneCall
 704  *
 705  * @ingroup call_control
 706  *
 707  * return user_pointer an opaque user pointer that can be retrieved at any time
 708 **/
 709 void *linphone_call_get_user_pointer(LinphoneCall *call)
 710 {
 711         return call->user_pointer;
 712 }
 713
 714 /**
 715  * Set the user_pointer in the LinphoneCall
 716  *
 717  * @ingroup call_control
 718  *
 719  * the user_pointer is an opaque user pointer that can be retrieved at any time in the LinphoneCall
 720 **/
 721 void linphone_call_set_user_pointer(LinphoneCall *call, void *user_pointer)
 722 {
 723         call->user_pointer = user_pointer;
 724 }
 725
 726 /**
 727  * Returns the call log associated to this call.
 728 **/
 729 LinphoneCallLog *linphone_call_get_call_log(const LinphoneCall *call){
 730         return call->log;
 731 }
 732
 733 /**
 734  * Returns the refer-to uri (if the call was transfered).
 735 **/
 736 const char *linphone_call_get_refer_to(const LinphoneCall *call){
 737         return call->refer_to;
 738 }
 739
 740 /**
 741  * Returns direction of the call (incoming or outgoing).
 742 **/
 743 LinphoneCallDir linphone_call_get_dir(const LinphoneCall *call){
 744         return call->log->dir;
 745 }
 746
 747 /**
 748  * Returns the far end's user agent description string, if available.
 749 **/
 750 const char *linphone_call_get_remote_user_agent(LinphoneCall *call){
 751         if (call->op){
 752                 return sal_op_get_remote_ua (call->op);
 753         }
 754         return NULL;
 755 }
 756
 757 /**
 758  * Returns true if this calls has received a transfer that has not been
 759  * executed yet.
 760  * Pending transfers are executed when this call is being paused or closed,
 761  * locally or by remote endpoint.
 762  * If the call is already paused while receiving the transfer request, the
 763  * transfer immediately occurs.
 764 **/
 765 bool_t linphone_call_has_transfer_pending(const LinphoneCall *call){
 766         return call->refer_pending;
 767 }
 768
 769 /**
 770  * Returns call's duration in seconds.
 771 **/
 772 int linphone_call_get_duration(const LinphoneCall *call){
 773         if (call->media_start_time==0) return 0;
 774         return time(NULL)-call->media_start_time;
 775 }
 776
 777 /**
 778  * Returns the call object this call is replacing, if any.
 779  * Call replacement can occur during call transfers.
 780  * By default, the core automatically terminates the replaced call and accept the new one.
 781  * This function allows the application to know whether a new incoming call is a one that replaces another one.
 782 **/
 783 LinphoneCall *linphone_call_get_replaced_call(LinphoneCall *call){
 784         SalOp *op=sal_call_get_replaces(call->op);
 785         if (op){
 786                 return (LinphoneCall*)sal_op_get_user_pointer(op);
 787         }
 788         return NULL;
 789 }
 790
 791 /**
 792  * Indicate whether camera input should be sent to remote end.
 793 **/
 794 void linphone_call_enable_camera (LinphoneCall *call, bool_t enable){
 795 #ifdef VIDEO_ENABLED
 796         if (call->videostream!=NULL && call->videostream->ticker!=NULL){
 797                 LinphoneCore *lc=call->core;
 798                 MSWebCam *nowebcam=get_nowebcam_device();
 799                 if (call->camera_active!=enable && lc->video_conf.device!=nowebcam){
 800                         video_stream_change_camera(call->videostream,
 801                                      enable ? lc->video_conf.device : nowebcam);
 802                 }
 803         }
 804         call->camera_active=enable;
 805 #endif
 806 }
 807
 808 /**
 809  * Take a photo of currently received video and write it into a jpeg file.
 810 **/
 811 int linphone_call_take_video_snapshot(LinphoneCall *call, const char *file){
 812 #ifdef VIDEO_ENABLED
 813         if (call->videostream!=NULL && call->videostream->jpegwriter!=NULL){
 814                 return ms_filter_call_method(call->videostream->jpegwriter,MS_JPEG_WRITER_TAKE_SNAPSHOT,(void*)file);
 815         }
 816         ms_warning("Cannot take snapshot: no currently running video stream on this call.");
 817         return -1;
 818 #endif
 819         return -1;
 820 }
 821
 822 /**
 823  * Returns TRUE if camera pictures are sent to the remote party.
 824 **/
 825 bool_t linphone_call_camera_enabled (const LinphoneCall *call){
 826         return call->camera_active;
 827 }
 828
 829 /**
 830  * Enable video stream.
 831 **/
 832 void linphone_call_params_enable_video(LinphoneCallParams *cp, bool_t enabled){
 833         cp->has_video=enabled;
 834 }
 835
 836 const PayloadType* linphone_call_params_get_used_audio_codec(const LinphoneCallParams *cp) {
 837         return cp->audio_codec;
 838 }
 839
 840 const PayloadType* linphone_call_params_get_used_video_codec(const LinphoneCallParams *cp) {
 841         return cp->video_codec;
 842 }
 843
 844 /**
 845  * Returns whether video is enabled.
 846 **/
 847 bool_t linphone_call_params_video_enabled(const LinphoneCallParams *cp){
 848         return cp->has_video;
 849 }
 850
 851 enum LinphoneMediaEncryption linphone_call_params_get_media_encryption(const LinphoneCallParams *cp) {
 852         return cp->media_encryption;
 853 }
 854
 855 void linphone_call_params_set_media_encryption(LinphoneCallParams *cp, enum LinphoneMediaEncryption e) {
 856         cp->media_encryption = e;
 857 }
 858
 859
 860 /**
 861  * Enable sending of real early media (during outgoing calls).
 862 **/
 863 void linphone_call_params_enable_early_media_sending(LinphoneCallParams *cp, bool_t enabled){
 864         cp->real_early_media=enabled;
 865 }
 866
 867 bool_t linphone_call_params_early_media_sending_enabled(const LinphoneCallParams *cp){
 868         return cp->real_early_media;
 869 }
 870
 871 /**
 872  * Returns true if the call is part of the locally managed conference.
 873 **/
 874 bool_t linphone_call_params_local_conference_mode(const LinphoneCallParams *cp){
 875         return cp->in_conference;
 876 }
 877
 878 /**
 879  * Refine bandwidth settings for this call by setting a bandwidth limit for audio streams.
 880  * As a consequence, codecs whose bitrates are not compatible with this limit won't be used.
 881 **/
 882 void linphone_call_params_set_audio_bandwidth_limit(LinphoneCallParams *cp, int bandwidth){
 883         cp->audio_bw=bandwidth;
 884 }
 885
 886 #ifdef VIDEO_ENABLED
 887 /**
 888  * Request remote side to send us a Video Fast Update.
 889 **/
 890 void linphone_call_send_vfu_request(LinphoneCall *call)
 891 {
 892         if (LinphoneCallStreamsRunning == linphone_call_get_state(call))
 893                 sal_call_send_vfu_request(call->op);
 894 }
 895 #endif
 896
 897 /**
 898  *
 899 **/
 900 LinphoneCallParams * linphone_call_params_copy(const LinphoneCallParams *cp){
 901         LinphoneCallParams *ncp=ms_new0(LinphoneCallParams,1);
 902         memcpy(ncp,cp,sizeof(LinphoneCallParams));
 903         return ncp;
 904 }
 905
 906 /**
 907  *
 908 **/
 909 void linphone_call_params_destroy(LinphoneCallParams *p){
 910         ms_free(p);
 911 }
 912
 913 /**
 914  * @}
 915 **/
 916
 917
 918 #ifdef TEST_EXT_RENDERER
 919 static void rendercb(void *data, const MSPicture *local, const MSPicture *remote){
 920         ms_message("rendercb, local buffer=%p, remote buffer=%p",
 921                    local ? local->planes[0] : NULL, remote? remote->planes[0] : NULL);
 922 }
 923 #endif
 924
 925 #ifdef VIDEO_ENABLED
 926 static void video_stream_event_cb(void *user_pointer, const MSFilter *f, const unsigned int event_id, const void *args){
 927     LinphoneCall* call = (LinphoneCall*) user_pointer;
 928         ms_warning("In linphonecall.c: video_stream_event_cb");
 929         switch (event_id) {
 930                 case MS_VIDEO_DECODER_DECODING_ERRORS:
 931                         ms_warning("Case is MS_VIDEO_DECODER_DECODING_ERRORS");
 932                         linphone_call_send_vfu_request(call);
 933                         break;
 934         case MS_VIDEO_DECODER_FIRST_IMAGE_DECODED:
 935             ms_message("First video frame decoded successfully");
 936             if (call->nextVideoFrameDecoded._func != NULL)
 937                 call->nextVideoFrameDecoded._func(call, call->nextVideoFrameDecoded._user_data);
 938             break;
 939                 default:
 940                         ms_warning("Unhandled event %i", event_id);
 941                         break;
 942         }
 943 }
 944 #endif
 945
 946 void linphone_call_set_next_video_frame_decoded_callback(LinphoneCall *call, LinphoneCallCbFunc cb, void* user_data) {
 947     call->nextVideoFrameDecoded._func = cb;
 948     call->nextVideoFrameDecoded._user_data = user_data;
 949 #ifdef VIDEO_ENABLED
 950     ms_filter_call_method_noarg(call->videostream->decoder, MS_VIDEO_DECODER_RESET_FIRST_IMAGE_NOTIFICATION);
 951 #endif
 952 }
 953
 954 void linphone_call_init_audio_stream(LinphoneCall *call){
 955         LinphoneCore *lc=call->core;
 956         SalMediaDescription *md=call->localdesc;
 957         AudioStream *audiostream;
 958         int dscp=lp_config_get_int(lc->config,"rtp","audio_dscp",-1);
 959
 960         call->audiostream=audiostream=audio_stream_new(md->streams[0].rtp_port,md->streams[0].rtcp_port,linphone_core_ipv6_enabled(lc));
 961         if (dscp!=-1)
 962                 audio_stream_set_dscp(audiostream,dscp);
 963         if (linphone_core_echo_limiter_enabled(lc)){
 964                 const char *type=lp_config_get_string(lc->config,"sound","el_type","mic");
 965                 if (strcasecmp(type,"mic")==0)
 966                         audio_stream_enable_echo_limiter(audiostream,ELControlMic);
 967                 else if (strcasecmp(type,"full")==0)
 968                         audio_stream_enable_echo_limiter(audiostream,ELControlFull);
 969         }
 970         audio_stream_enable_gain_control(audiostream,TRUE);
 971         if (linphone_core_echo_cancellation_enabled(lc)){
 972                 int len,delay,framesize;
 973                 const char *statestr=lp_config_get_string(lc->config,"sound","ec_state",NULL);
 974                 len=lp_config_get_int(lc->config,"sound","ec_tail_len",0);
 975                 delay=lp_config_get_int(lc->config,"sound","ec_delay",0);
 976                 framesize=lp_config_get_int(lc->config,"sound","ec_framesize",0);
 977                 audio_stream_set_echo_canceller_params(audiostream,len,delay,framesize);
 978                 if (statestr && audiostream->ec){
 979                         ms_filter_call_method(audiostream->ec,MS_ECHO_CANCELLER_SET_STATE_STRING,(void*)statestr);
 980                 }
 981         }
 982         audio_stream_enable_automatic_gain_control(audiostream,linphone_core_agc_enabled(lc));
 983         {
 984                 int enabled=lp_config_get_int(lc->config,"sound","noisegate",0);
 985                 audio_stream_enable_noise_gate(audiostream,enabled);
 986         }
 987
 988         audio_stream_set_features(audiostream,linphone_core_get_audio_features(lc));
 989
 990         if (lc->rtptf){
 991                 RtpTransport *artp=lc->rtptf->audio_rtp_func(lc->rtptf->audio_rtp_func_data, call->audio_port);
 992                 RtpTransport *artcp=lc->rtptf->audio_rtcp_func(lc->rtptf->audio_rtcp_func_data, call->audio_port+1);
 993                 rtp_session_set_transports(audiostream->session,artp,artcp);
 994         }
 995         if ((linphone_core_get_firewall_policy(lc) == LinphonePolicyUseIce) && (call->ice_session != NULL)){
 996                 rtp_session_set_pktinfo(audiostream->session, TRUE);
 997                 rtp_session_set_symmetric_rtp(audiostream->session, FALSE);
 998                 audiostream->ice_check_list = ice_session_check_list(call->ice_session, 0);
 999                 ice_check_list_set_rtp_session(audiostream->ice_check_list, audiostream->session);
1000         }
1001
1002         call->audiostream_app_evq = ortp_ev_queue_new();
1003         rtp_session_register_event_queue(audiostream->session,call->audiostream_app_evq);
1004 }
1005
1006 void linphone_call_init_video_stream(LinphoneCall *call){
1007 #ifdef VIDEO_ENABLED
1008         LinphoneCore *lc=call->core;
1009         SalMediaDescription *md=call->localdesc;
1010
1011         if ((lc->video_conf.display || lc->video_conf.capture) && md->streams[1].rtp_port>0){
1012                 int video_recv_buf_size=lp_config_get_int(lc->config,"video","recv_buf_size",0);
1013                 int dscp=lp_config_get_int(lc->config,"rtp","video_dscp",-1);
1014
1015                 call->videostream=video_stream_new(md->streams[1].rtp_port,md->streams[1].rtcp_port,linphone_core_ipv6_enabled(lc));
1016                 if (dscp!=-1)
1017                         video_stream_set_dscp(call->videostream,dscp);
1018                 video_stream_enable_display_filter_auto_rotate(call->videostream, lp_config_get_int(lc->config,"video","display_filter_auto_rotate",0));
1019                 if (video_recv_buf_size>0) rtp_session_set_recv_buf_size(call->videostream->session,video_recv_buf_size);
1020
1021                 if( lc->video_conf.displaytype != NULL)
1022                         video_stream_set_display_filter_name(call->videostream,lc->video_conf.displaytype);
1023                 video_stream_set_event_callback(call->videostream,video_stream_event_cb, call);
1024                 if (lc->rtptf){
1025                         RtpTransport *vrtp=lc->rtptf->video_rtp_func(lc->rtptf->video_rtp_func_data, call->video_port);
1026                         RtpTransport *vrtcp=lc->rtptf->video_rtcp_func(lc->rtptf->video_rtcp_func_data, call->video_port+1);
1027                         rtp_session_set_transports(call->videostream->session,vrtp,vrtcp);
1028                 }
1029                 if ((linphone_core_get_firewall_policy(lc) == LinphonePolicyUseIce) && (call->ice_session != NULL) && (ice_session_check_list(call->ice_session, 1))){
1030                         rtp_session_set_pktinfo(call->videostream->session, TRUE);
1031                         rtp_session_set_symmetric_rtp(call->videostream->session, FALSE);
1032                         call->videostream->ice_check_list = ice_session_check_list(call->ice_session, 1);
1033                         ice_check_list_set_rtp_session(call->videostream->ice_check_list, call->videostream->session);
1034                 }
1035                 call->videostream_app_evq = ortp_ev_queue_new();
1036                 rtp_session_register_event_queue(call->videostream->session,call->videostream_app_evq);
1037 #ifdef TEST_EXT_RENDERER
1038                 video_stream_set_render_callback(call->videostream,rendercb,NULL);
1039 #endif
1040         }
1041 #else
1042         call->videostream=NULL;
1043 #endif
1044 }
1045
1046 void linphone_call_init_media_streams(LinphoneCall *call){
1047         linphone_call_init_audio_stream(call);
1048         linphone_call_init_video_stream(call);
1049 }
1050
1051
1052 static int dtmf_tab[16]={'0','1','2','3','4','5','6','7','8','9','*','#','A','B','C','D'};
1053
1054 static void linphone_core_dtmf_received(RtpSession* s, int dtmf, void* user_data){
1055         LinphoneCore* lc = (LinphoneCore*)user_data;
1056         if (dtmf<0 || dtmf>15){
1057                 ms_warning("Bad dtmf value %i",dtmf);
1058                 return;
1059         }
1060         if (lc->vtable.dtmf_received != NULL)
1061                 lc->vtable.dtmf_received(lc, linphone_core_get_current_call(lc), dtmf_tab[dtmf]);
1062 }
1063
1064 static void parametrize_equalizer(LinphoneCore *lc, AudioStream *st){
1065         if (st->equalizer){
1066                 MSFilter *f=st->equalizer;
1067                 int enabled=lp_config_get_int(lc->config,"sound","eq_active",0);
1068                 const char *gains=lp_config_get_string(lc->config,"sound","eq_gains",NULL);
1069                 ms_filter_call_method(f,MS_EQUALIZER_SET_ACTIVE,&enabled);
1070                 if (enabled){
1071                         if (gains){
1072                                 do{
1073                                         int bytes;
1074                                         MSEqualizerGain g;
1075                                         if (sscanf(gains,"%f:%f:%f %n",&g.frequency,&g.gain,&g.width,&bytes)==3){
1076                                                 ms_message("Read equalizer gains: %f(~%f) --> %f",g.frequency,g.width,g.gain);
1077                                                 ms_filter_call_method(f,MS_EQUALIZER_SET_GAIN,&g);
1078                                                 gains+=bytes;
1079                                         }else break;
1080                                 }while(1);
1081                         }
1082                 }
1083         }
1084 }
1085
1086 void _post_configure_audio_stream(AudioStream *st, LinphoneCore *lc, bool_t muted){
1087         float mic_gain=lp_config_get_float(lc->config,"sound","mic_gain",1);
1088         float thres = 0;
1089         float recv_gain;
1090         float ng_thres=lp_config_get_float(lc->config,"sound","ng_thres",0.05);
1091         float ng_floorgain=lp_config_get_float(lc->config,"sound","ng_floorgain",0);
1092         int dc_removal=lp_config_get_int(lc->config,"sound","dc_removal",0);
1093
1094         if (!muted)
1095                 audio_stream_set_mic_gain(st,mic_gain);
1096         else
1097                 audio_stream_set_mic_gain(st,0);
1098
1099         recv_gain = lc->sound_conf.soft_play_lev;
1100         if (recv_gain != 0) {
1101                 linphone_core_set_playback_gain_db (lc,recv_gain);
1102         }
1103
1104         if (st->volsend){
1105                 ms_filter_call_method(st->volsend,MS_VOLUME_REMOVE_DC,&dc_removal);
1106                 float speed=lp_config_get_float(lc->config,"sound","el_speed",-1);
1107                 thres=lp_config_get_float(lc->config,"sound","el_thres",-1);
1108                 float force=lp_config_get_float(lc->config,"sound","el_force",-1);
1109                 int sustain=lp_config_get_int(lc->config,"sound","el_sustain",-1);
1110                 float transmit_thres=lp_config_get_float(lc->config,"sound","el_transmit_thres",-1);
1111                 MSFilter *f=NULL;
1112                 f=st->volsend;
1113                 if (speed==-1) speed=0.03;
1114                 if (force==-1) force=25;
1115                 ms_filter_call_method(f,MS_VOLUME_SET_EA_SPEED,&speed);
1116                 ms_filter_call_method(f,MS_VOLUME_SET_EA_FORCE,&force);
1117                 if (thres!=-1)
1118                         ms_filter_call_method(f,MS_VOLUME_SET_EA_THRESHOLD,&thres);
1119                 if (sustain!=-1)
1120                         ms_filter_call_method(f,MS_VOLUME_SET_EA_SUSTAIN,&sustain);
1121                 if (transmit_thres!=-1)
1122                                 ms_filter_call_method(f,MS_VOLUME_SET_EA_TRANSMIT_THRESHOLD,&transmit_thres);
1123
1124                 ms_filter_call_method(st->volsend,MS_VOLUME_SET_NOISE_GATE_THRESHOLD,&ng_thres);
1125                 ms_filter_call_method(st->volsend,MS_VOLUME_SET_NOISE_GATE_FLOORGAIN,&ng_floorgain);
1126         }
1127         if (st->volrecv){
1128                 /* parameters for a limited noise-gate effect, using echo limiter threshold */
1129                 float floorgain = 1/mic_gain;
1130                 int spk_agc=lp_config_get_int(lc->config,"sound","speaker_agc_enabled",0);
1131                 ms_filter_call_method(st->volrecv, MS_VOLUME_ENABLE_AGC, &spk_agc);
1132                 ms_filter_call_method(st->volrecv,MS_VOLUME_SET_NOISE_GATE_THRESHOLD,&ng_thres);
1133                 ms_filter_call_method(st->volrecv,MS_VOLUME_SET_NOISE_GATE_FLOORGAIN,&floorgain);
1134         }
1135         parametrize_equalizer(lc,st);
1136 }
1137
1138 static void post_configure_audio_streams(LinphoneCall*call){
1139         AudioStream *st=call->audiostream;
1140         LinphoneCore *lc=call->core;
1141         _post_configure_audio_stream(st,lc,call->audio_muted);
1142         if (lc->vtable.dtmf_received!=NULL){
1143                 /* replace by our default action*/
1144                 audio_stream_play_received_dtmfs(call->audiostream,FALSE);
1145                 rtp_session_signal_connect(call->audiostream->session,"telephone-event",(RtpCallback)linphone_core_dtmf_received,(unsigned long)lc);
1146         }
1147 }
1148
1149 static RtpProfile *make_profile(LinphoneCall *call, const SalMediaDescription *md, const SalStreamDescription *desc, int *used_pt){
1150         int bw;
1151         const MSList *elem;
1152         RtpProfile *prof=rtp_profile_new("Call profile");
1153         bool_t first=TRUE;
1154         int remote_bw=0;
1155         LinphoneCore *lc=call->core;
1156         int up_ptime=0;
1157         const LinphoneCallParams *params=&call->params;
1158         *used_pt=-1;
1159
1160         for(elem=desc->payloads;elem!=NULL;elem=elem->next){
1161                 PayloadType *pt=(PayloadType*)elem->data;
1162                 int number;
1163
1164                 if ((pt->flags & PAYLOAD_TYPE_FLAG_CAN_SEND) && first) {
1165                         if (desc->type==SalAudio){
1166                                 linphone_core_update_allocated_audio_bandwidth_in_call(call,pt);
1167                                 if (params->up_ptime)
1168                                         up_ptime=params->up_ptime;
1169                                 else up_ptime=linphone_core_get_upload_ptime(lc);
1170                         }
1171                         *used_pt=payload_type_get_number(pt);
1172                         first=FALSE;
1173                 }
1174                 if (desc->bandwidth>0) remote_bw=desc->bandwidth;
1175                 else if (md->bandwidth>0) {
1176                         /*case where b=AS is given globally, not per stream*/
1177                         remote_bw=md->bandwidth;
1178                         if (desc->type==SalVideo){
1179                                 remote_bw=get_video_bandwidth(remote_bw,call->audio_bw);
1180                         }
1181                 }
1182
1183                 if (desc->type==SalAudio){
1184                         int audio_bw=call->audio_bw;
1185                         if (params->up_bw){
1186                                 if (params->up_bw< audio_bw)
1187                                         audio_bw=params->up_bw;
1188                         }
1189                         bw=get_min_bandwidth(audio_bw,remote_bw);
1190                 }else bw=get_min_bandwidth(get_video_bandwidth(linphone_core_get_upload_bandwidth (lc),call->audio_bw),remote_bw);
1191                 if (bw>0) pt->normal_bitrate=bw*1000;
1192                 else if (desc->type==SalAudio){
1193                         pt->normal_bitrate=-1;
1194                 }
1195                 if (desc->ptime>0){
1196                         up_ptime=desc->ptime;
1197                 }
1198                 if (up_ptime>0){
1199                         char tmp[40];
1200                         snprintf(tmp,sizeof(tmp),"ptime=%i",up_ptime);
1201                         payload_type_append_send_fmtp(pt,tmp);
1202                 }
1203                 number=payload_type_get_number(pt);
1204                 if (rtp_profile_get_payload(prof,number)!=NULL){
1205                         ms_warning("A payload type with number %i already exists in profile !",number);
1206                 }else
1207                         rtp_profile_set_payload(prof,number,pt);
1208         }
1209         return prof;
1210 }
1211
1212
1213 static void setup_ring_player(LinphoneCore *lc, LinphoneCall *call){
1214         int pause_time=3000;
1215         audio_stream_play(call->audiostream,lc->sound_conf.ringback_tone);
1216         ms_filter_call_method(call->audiostream->soundread,MS_FILE_PLAYER_LOOP,&pause_time);
1217 }
1218
1219 #define LINPHONE_RTCP_SDES_TOOL "Linphone-" LINPHONE_VERSION
1220
1221 static bool_t linphone_call_sound_resources_available(LinphoneCall *call){
1222         LinphoneCore *lc=call->core;
1223         LinphoneCall *current=linphone_core_get_current_call(lc);
1224         return !linphone_core_is_in_conference(lc) &&
1225                 (current==NULL || current==call);
1226 }
1227 static int find_crypto_index_from_tag(const SalSrtpCryptoAlgo crypto[],unsigned char tag) {
1228     int i;
1229     for(i=0; i<SAL_CRYPTO_ALGO_MAX; i++) {
1230         if (crypto[i].tag == tag) {
1231             return i;
1232         }
1233     }
1234     return -1;
1235 }
1236 static void linphone_call_start_audio_stream(LinphoneCall *call, const char *cname, bool_t muted, bool_t send_ringbacktone, bool_t use_arc){
1237         LinphoneCore *lc=call->core;
1238         int used_pt=-1;
1239         /* look for savp stream first */
1240         const SalStreamDescription *stream=sal_media_description_find_stream(call->resultdesc,
1241                                                 SalProtoRtpSavp,SalAudio);
1242         /* no savp audio stream, use avp */
1243         if (!stream)
1244                 stream=sal_media_description_find_stream(call->resultdesc,
1245                                                 SalProtoRtpAvp,SalAudio);
1246
1247         if (stream && stream->dir!=SalStreamInactive && stream->rtp_port!=0){
1248                 MSSndCard *playcard=lc->sound_conf.lsd_card ?
1249                         lc->sound_conf.lsd_card : lc->sound_conf.play_sndcard;
1250                 MSSndCard *captcard=lc->sound_conf.capt_sndcard;
1251                 const char *playfile=lc->play_file;
1252                 const char *recfile=lc->rec_file;
1253                 call->audio_profile=make_profile(call,call->resultdesc,stream,&used_pt);
1254                 bool_t use_ec;
1255
1256                 if (used_pt!=-1){
1257                         call->current_params.audio_codec = rtp_profile_get_payload(call->audio_profile, used_pt);
1258                         if (playcard==NULL) {
1259                                 ms_warning("No card defined for playback !");
1260                         }
1261                         if (captcard==NULL) {
1262                                 ms_warning("No card defined for capture !");
1263                         }
1264                         /*Replace soundcard filters by inactive file players or recorders
1265                          when placed in recvonly or sendonly mode*/
1266                         if (stream->rtp_port==0 || stream->dir==SalStreamRecvOnly){
1267                                 captcard=NULL;
1268                                 playfile=NULL;
1269                         }else if (stream->dir==SalStreamSendOnly){
1270                                 playcard=NULL;
1271                                 captcard=NULL;
1272                                 recfile=NULL;
1273                                 /*And we will eventually play "playfile" if set by the user*/
1274                                 /*playfile=NULL;*/
1275                         }
1276                         if (send_ringbacktone){
1277                                 captcard=NULL;
1278                                 playfile=NULL;/* it is setup later*/
1279                         }
1280                         /*if playfile are supplied don't use soundcards*/
1281                         if (lc->use_files) {
1282                                 captcard=NULL;
1283                                 playcard=NULL;
1284                         }
1285                         if (call->params.in_conference){
1286                                 /* first create the graph without soundcard resources*/
1287                                 captcard=playcard=NULL;
1288                         }
1289                         if (!linphone_call_sound_resources_available(call)){
1290                                 ms_message("Sound resources are used by another call, not using soundcard.");
1291                                 captcard=playcard=NULL;
1292                         }
1293                         use_ec=captcard==NULL ? FALSE : linphone_core_echo_cancellation_enabled(lc);
1294                         if (playcard &&  stream->max_rate>0) ms_snd_card_set_preferred_sample_rate(playcard, stream->max_rate);
1295                         if (captcard &&  stream->max_rate>0) ms_snd_card_set_preferred_sample_rate(captcard, stream->max_rate);
1296                         audio_stream_enable_adaptive_bitrate_control(call->audiostream,use_arc);
1297                         audio_stream_enable_adaptive_jittcomp(call->audiostream, linphone_core_audio_adaptive_jittcomp_enabled(lc));
1298                         audio_stream_start_full(
1299                                 call->audiostream,
1300                                 call->audio_profile,
1301                                 stream->rtp_addr[0]!='\0' ? stream->rtp_addr : call->resultdesc->addr,
1302                                 stream->rtp_port,
1303                                 stream->rtcp_addr[0]!='\0' ? stream->rtcp_addr : call->resultdesc->addr,
1304                                 linphone_core_rtcp_enabled(lc) ? (stream->rtcp_port) : 0,
1305                                 used_pt,
1306                                 linphone_core_get_audio_jittcomp(lc),
1307                                 playfile,
1308                                 recfile,
1309                                 playcard,
1310                                 captcard,
1311                                 use_ec
1312                                 );
1313                         post_configure_audio_streams(call);
1314                         if (muted && !send_ringbacktone){
1315                                 audio_stream_set_mic_gain(call->audiostream,0);
1316                         }
1317                         if (stream->dir==SalStreamSendOnly && playfile!=NULL){
1318                                 int pause_time=500;
1319                                 ms_filter_call_method(call->audiostream->soundread,MS_FILE_PLAYER_LOOP,&pause_time);
1320                         }
1321                         if (send_ringbacktone){
1322                                 setup_ring_player(lc,call);
1323                         }
1324                         audio_stream_set_rtcp_information(call->audiostream, cname, LINPHONE_RTCP_SDES_TOOL);
1325
1326             /* valid local tags are > 0 */
1327                         if (stream->proto == SalProtoRtpSavp) {
1328                 const SalStreamDescription *local_st_desc=sal_media_description_find_stream(call->localdesc,
1329                                                                                             SalProtoRtpSavp,SalAudio);
1330                 int crypto_idx = find_crypto_index_from_tag(local_st_desc->crypto, stream->crypto_local_tag);
1331
1332                 if (crypto_idx >= 0) {
1333                     audio_stream_enable_strp(
1334                                              call->audiostream,
1335                                              stream->crypto[0].algo,
1336                                              local_st_desc->crypto[crypto_idx].master_key,
1337                                              stream->crypto[0].master_key);
1338                     call->audiostream_encrypted=TRUE;
1339                 } else {
1340                     ms_warning("Failed to find local crypto algo with tag: %d", stream->crypto_local_tag);
1341                     call->audiostream_encrypted=FALSE;
1342                 }
1343                         }else call->audiostream_encrypted=FALSE;
1344                         if (call->params.in_conference){
1345                                 /*transform the graph to connect it to the conference filter */
1346                                 bool_t mute=stream->dir==SalStreamRecvOnly;
1347                                 linphone_call_add_to_conf(call, mute);
1348                         }
1349                         call->current_params.in_conference=call->params.in_conference;
1350                 }else ms_warning("No audio stream accepted ?");
1351         }
1352 }
1353
1354 static void linphone_call_start_video_stream(LinphoneCall *call, const char *cname,bool_t all_inputs_muted){
1355 #ifdef VIDEO_ENABLED
1356         LinphoneCore *lc=call->core;
1357         int used_pt=-1;
1358         /* look for savp stream first */
1359         const SalStreamDescription *vstream=sal_media_description_find_stream(call->resultdesc,
1360                                                 SalProtoRtpSavp,SalVideo);
1361         /* no savp audio stream, use avp */
1362         if (!vstream)
1363                 vstream=sal_media_description_find_stream(call->resultdesc,
1364                                                 SalProtoRtpAvp,SalVideo);
1365
1366         /* shutdown preview */
1367         if (lc->previewstream!=NULL) {
1368                 video_preview_stop(lc->previewstream);
1369                 lc->previewstream=NULL;
1370         }
1371
1372         if (vstream!=NULL && vstream->dir!=SalStreamInactive && vstream->rtp_port!=0) {
1373                 const char *rtp_addr=vstream->rtp_addr[0]!='\0' ? vstream->rtp_addr : call->resultdesc->addr;
1374                 const char *rtcp_addr=vstream->rtcp_addr[0]!='\0' ? vstream->rtcp_addr : call->resultdesc->addr;
1375                 call->video_profile=make_profile(call,call->resultdesc,vstream,&used_pt);
1376                 if (used_pt!=-1){
1377                         call->current_params.video_codec = rtp_profile_get_payload(call->video_profile, used_pt);
1378                         VideoStreamDir dir=VideoStreamSendRecv;
1379                         MSWebCam *cam=lc->video_conf.device;
1380                         bool_t is_inactive=FALSE;
1381
1382                         call->current_params.has_video=TRUE;
1383
1384                         video_stream_enable_adaptive_bitrate_control(call->videostream,
1385                                                                   linphone_core_adaptive_rate_control_enabled(lc));
1386                         video_stream_enable_adaptive_jittcomp(call->videostream, linphone_core_video_adaptive_jittcomp_enabled(lc));
1387                         video_stream_set_sent_video_size(call->videostream,linphone_core_get_preferred_video_size(lc));
1388                         video_stream_enable_self_view(call->videostream,lc->video_conf.selfview);
1389                         if (lc->video_window_id!=0)
1390                                 video_stream_set_native_window_id(call->videostream,lc->video_window_id);
1391                         if (lc->preview_window_id!=0)
1392                                 video_stream_set_native_preview_window_id (call->videostream,lc->preview_window_id);
1393                         video_stream_use_preview_video_window (call->videostream,lc->use_preview_window);
1394
1395                         if (vstream->dir==SalStreamSendOnly && lc->video_conf.capture ){
1396                                 cam=get_nowebcam_device();
1397                                 dir=VideoStreamSendOnly;
1398                         }else if (vstream->dir==SalStreamRecvOnly && lc->video_conf.display ){
1399                                 dir=VideoStreamRecvOnly;
1400                         }else if (vstream->dir==SalStreamSendRecv){
1401                                 if (lc->video_conf.display && lc->video_conf.capture)
1402                                         dir=VideoStreamSendRecv;
1403                                 else if (lc->video_conf.display)
1404                                         dir=VideoStreamRecvOnly;
1405                                 else
1406                                         dir=VideoStreamSendOnly;
1407                         }else{
1408                                 ms_warning("video stream is inactive.");
1409                                 /*either inactive or incompatible with local capabilities*/
1410                                 is_inactive=TRUE;
1411                         }
1412                         if (call->camera_active==FALSE || all_inputs_muted){
1413                                 cam=get_nowebcam_device();
1414                         }
1415                         if (!is_inactive){
1416                 call->log->video_enabled = TRUE;
1417                                 video_stream_set_direction (call->videostream, dir);
1418                                 ms_message("%s lc rotation:%d\n", __FUNCTION__, lc->device_rotation);
1419                                 video_stream_set_device_rotation(call->videostream, lc->device_rotation);
1420                                 video_stream_start(call->videostream,
1421                                         call->video_profile, rtp_addr, vstream->rtp_port,
1422                                         rtcp_addr, linphone_core_rtcp_enabled(lc) ? (vstream->rtcp_port) : 0,
1423                                         used_pt, linphone_core_get_video_jittcomp(lc), cam);
1424                                 video_stream_set_rtcp_information(call->videostream, cname,LINPHONE_RTCP_SDES_TOOL);
1425                         }
1426
1427                         if (vstream->proto == SalProtoRtpSavp) {
1428                                 const SalStreamDescription *local_st_desc=sal_media_description_find_stream(call->localdesc,
1429                                                 SalProtoRtpSavp,SalVideo);
1430
1431                                 video_stream_enable_strp(
1432                                         call->videostream,
1433                                         vstream->crypto[0].algo,
1434                                         local_st_desc->crypto[0].master_key,
1435                                         vstream->crypto[0].master_key
1436                                         );
1437                                 call->videostream_encrypted=TRUE;
1438                         }else{
1439                                 call->videostream_encrypted=FALSE;
1440                         }
1441                 }else ms_warning("No video stream accepted.");
1442         }else{
1443                 ms_warning("No valid video stream defined.");
1444         }
1445 #endif
1446 }
1447
1448 void linphone_call_start_media_streams(LinphoneCall *call, bool_t all_inputs_muted, bool_t send_ringbacktone){
1449         LinphoneCore *lc=call->core;
1450
1451         call->current_params.audio_codec = NULL;
1452         call->current_params.video_codec = NULL;
1453
1454         LinphoneAddress *me=linphone_core_get_primary_contact_parsed(lc);
1455         char *cname;
1456         bool_t use_arc=linphone_core_adaptive_rate_control_enabled(lc);
1457 #ifdef VIDEO_ENABLED
1458         const SalStreamDescription *vstream=sal_media_description_find_stream(call->resultdesc,
1459                                                         SalProtoRtpAvp,SalVideo);
1460 #endif
1461
1462         if ((call->audiostream == NULL) && (call->videostream == NULL)) {
1463                 ms_fatal("start_media_stream() called without prior init !");
1464                 return;
1465         }
1466         cname=linphone_address_as_string_uri_only(me);
1467
1468 #if defined(VIDEO_ENABLED)
1469         if (vstream!=NULL && vstream->dir!=SalStreamInactive && vstream->payloads!=NULL){
1470                 /*when video is used, do not make adaptive rate control on audio, it is stupid.*/
1471                 use_arc=FALSE;
1472         }
1473 #endif
1474         if (call->audiostream!=NULL) {
1475                 linphone_call_start_audio_stream(call,cname,all_inputs_muted,send_ringbacktone,use_arc);
1476         }
1477         call->current_params.has_video=FALSE;
1478         if (call->videostream!=NULL) {
1479                 linphone_call_start_video_stream(call,cname,all_inputs_muted);
1480         }
1481
1482         call->all_muted=all_inputs_muted;
1483         call->playing_ringbacktone=send_ringbacktone;
1484         call->up_bw=linphone_core_get_upload_bandwidth(lc);
1485
1486         if (call->params.media_encryption==LinphoneMediaEncryptionZRTP) {
1487                 OrtpZrtpParams params;
1488                 /*will be set later when zrtp is activated*/
1489                 call->current_params.media_encryption=LinphoneMediaEncryptionNone;
1490
1491                 params.zid_file=lc->zrtp_secrets_cache;
1492                 audio_stream_enable_zrtp(call->audiostream,&params);
1493         }else if (call->params.media_encryption==LinphoneMediaEncryptionSRTP){
1494                 call->current_params.media_encryption=linphone_call_are_all_streams_encrypted(call) ?
1495                         LinphoneMediaEncryptionSRTP : LinphoneMediaEncryptionNone;
1496         }
1497
1498         /*also reflect the change if the "wished" params, in order to avoid to propose SAVP or video again
1499          * further in the call, for example during pause,resume, conferencing reINVITEs*/
1500         linphone_call_fix_call_parameters(call);
1501         if ((call->ice_session != NULL) && (ice_session_state(call->ice_session) != IS_Completed)) {
1502                 ice_session_start_connectivity_checks(call->ice_session);
1503         }
1504
1505         goto end;
1506         end:
1507                 ms_free(cname);
1508                 linphone_address_destroy(me);
1509 }
1510
1511 void linphone_call_start_media_streams_for_ice_gathering(LinphoneCall *call){
1512         audio_stream_prepare_sound(call->audiostream, NULL, NULL);
1513 #ifdef VIDEO_ENABLED
1514         if (call->videostream) {
1515                 video_stream_prepare_video(call->videostream);
1516         }
1517 #endif
1518 }
1519
1520 void linphone_call_delete_ice_session(LinphoneCall *call){
1521         if (call->ice_session != NULL) {
1522                 ice_session_destroy(call->ice_session);
1523                 call->ice_session = NULL;
1524                 if (call->audiostream != NULL) call->audiostream->ice_check_list = NULL;
1525                 if (call->videostream != NULL) call->videostream->ice_check_list = NULL;
1526         }
1527 }
1528
1529 static void linphone_call_log_fill_stats(LinphoneCallLog *log, AudioStream *st){
1530         audio_stream_get_local_rtp_stats (st,&log->local_stats);
1531         log->quality=audio_stream_get_average_quality_rating(st);
1532 }
1533
1534 void linphone_call_stop_media_streams(LinphoneCall *call){
1535         if (call->audiostream!=NULL) {
1536                 call->audiostream->ice_check_list = NULL;
1537                 rtp_session_unregister_event_queue(call->audiostream->session,call->audiostream_app_evq);
1538                 ortp_ev_queue_flush(call->audiostream_app_evq);
1539                 ortp_ev_queue_destroy(call->audiostream_app_evq);
1540                 call->audiostream_app_evq=NULL;
1541
1542                 if (call->audiostream->ec){
1543                         const char *state_str=NULL;
1544                         ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_GET_STATE_STRING,&state_str);
1545                         if (state_str){
1546                                 ms_message("Writing echo canceler state, %i bytes",(int)strlen(state_str));
1547                                 lp_config_set_string(call->core->config,"sound","ec_state",state_str);
1548                         }
1549                 }
1550                 linphone_call_log_fill_stats (call->log,call->audiostream);
1551                 if (call->endpoint){
1552                         linphone_call_remove_from_conf(call);
1553                 }
1554                 audio_stream_stop(call->audiostream);
1555                 call->audiostream=NULL;
1556         }
1557
1558
1559 #ifdef VIDEO_ENABLED
1560         if (call->videostream!=NULL){
1561                 call->videostream->ice_check_list = NULL;
1562                 rtp_session_unregister_event_queue(call->videostream->session,call->videostream_app_evq);
1563                 ortp_ev_queue_flush(call->videostream_app_evq);
1564                 ortp_ev_queue_destroy(call->videostream_app_evq);
1565                 call->videostream_app_evq=NULL;
1566                 video_stream_stop(call->videostream);
1567                 call->videostream=NULL;
1568         }
1569 #endif
1570         ms_event_queue_skip(call->core->msevq);
1571
1572         if (call->audio_profile){
1573                 rtp_profile_clear_all(call->audio_profile);
1574                 rtp_profile_destroy(call->audio_profile);
1575                 call->audio_profile=NULL;
1576         }
1577         if (call->video_profile){
1578                 rtp_profile_clear_all(call->video_profile);
1579                 rtp_profile_destroy(call->video_profile);
1580                 call->video_profile=NULL;
1581         }
1582 }
1583
1584
1585
1586 void linphone_call_enable_echo_cancellation(LinphoneCall *call, bool_t enable) {
1587         if (call!=NULL && call->audiostream!=NULL && call->audiostream->ec){
1588                 bool_t bypass_mode = !enable;
1589                 ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_SET_BYPASS_MODE,&bypass_mode);
1590         }
1591 }
1592 bool_t linphone_call_echo_cancellation_enabled(LinphoneCall *call) {
1593         if (call!=NULL && call->audiostream!=NULL && call->audiostream->ec){
1594                 bool_t val;
1595                 ms_filter_call_method(call->audiostream->ec,MS_ECHO_CANCELLER_GET_BYPASS_MODE,&val);
1596                 return !val;
1597         } else {
1598                 return linphone_core_echo_cancellation_enabled(call->core);
1599         }
1600 }
1601
1602 void linphone_call_enable_echo_limiter(LinphoneCall *call, bool_t val){
1603         if (call!=NULL && call->audiostream!=NULL ) {
1604                 if (val) {
1605                 const char *type=lp_config_get_string(call->core->config,"sound","el_type","mic");
1606                 if (strcasecmp(type,"mic")==0)
1607                         audio_stream_enable_echo_limiter(call->audiostream,ELControlMic);
1608                 else if (strcasecmp(type,"full")==0)
1609                         audio_stream_enable_echo_limiter(call->audiostream,ELControlFull);
1610                 } else {
1611                         audio_stream_enable_echo_limiter(call->audiostream,ELInactive);
1612                 }
1613         }
1614 }
1615
1616 bool_t linphone_call_echo_limiter_enabled(const LinphoneCall *call){
1617         if (call!=NULL && call->audiostream!=NULL ){
1618                 return call->audiostream->el_type !=ELInactive ;
1619         } else {
1620                 return linphone_core_echo_limiter_enabled(call->core);
1621         }
1622 }
1623
1624 /**
1625  * @addtogroup call_misc
1626  * @{
1627 **/
1628
1629 /**
1630  * Returns the measured sound volume played locally (received from remote).
1631  * It is expressed in dbm0.
1632 **/
1633 float linphone_call_get_play_volume(LinphoneCall *call){
1634         AudioStream *st=call->audiostream;
1635         if (st && st->volrecv){
1636                 float vol=0;
1637                 ms_filter_call_method(st->volrecv,MS_VOLUME_GET,&vol);
1638                 return vol;
1639
1640         }
1641         return LINPHONE_VOLUME_DB_LOWEST;
1642 }
1643
1644 /**
1645  * Returns the measured sound volume recorded locally (sent to remote).
1646  * It is expressed in dbm0.
1647 **/
1648 float linphone_call_get_record_volume(LinphoneCall *call){
1649         AudioStream *st=call->audiostream;
1650         if (st && st->volsend && !call->audio_muted && call->state==LinphoneCallStreamsRunning){
1651                 float vol=0;
1652                 ms_filter_call_method(st->volsend,MS_VOLUME_GET,&vol);
1653                 return vol;
1654
1655         }
1656         return LINPHONE_VOLUME_DB_LOWEST;
1657 }
1658
1659 /**
1660  * Obtain real-time quality rating of the call
1661  *
1662  * Based on local RTP statistics and RTCP feedback, a quality rating is computed and updated
1663  * during all the duration of the call. This function returns its value at the time of the function call.
1664  * It is expected that the rating is updated at least every 5 seconds or so.
1665  * The rating is a floating point number comprised between 0 and 5.
1666  *
1667  * 4-5 = good quality <br>
1668  * 3-4 = average quality <br>
1669  * 2-3 = poor quality <br>
1670  * 1-2 = very poor quality <br>
1671  * 0-1 = can't be worse, mostly unusable <br>
1672  *
1673  * @returns The function returns -1 if no quality measurement is available, for example if no
1674  * active audio stream exist. Otherwise it returns the quality rating.
1675 **/
1676 float linphone_call_get_current_quality(LinphoneCall *call){
1677         if (call->audiostream){
1678                 return audio_stream_get_quality_rating(call->audiostream);
1679         }
1680         return -1;
1681 }
1682
1683 /**
1684  * Returns call quality averaged over all the duration of the call.
1685  *
1686  * See linphone_call_get_current_quality() for more details about quality measurement.
1687 **/
1688 float linphone_call_get_average_quality(LinphoneCall *call){
1689         if (call->audiostream){
1690                 return audio_stream_get_average_quality_rating(call->audiostream);
1691         }
1692         return -1;
1693 }
1694
1695 /**
1696  * Access last known statistics for audio stream, for a given call.
1697 **/
1698 const LinphoneCallStats *linphone_call_get_audio_stats(const LinphoneCall *call) {
1699         return &call->stats[LINPHONE_CALL_STATS_AUDIO];
1700 }
1701
1702 /**
1703  * Access last known statistics for video stream, for a given call.
1704 **/
1705 const LinphoneCallStats *linphone_call_get_video_stats(const LinphoneCall *call) {
1706         return &call->stats[LINPHONE_CALL_STATS_VIDEO];
1707 }
1708
1709
1710 /**
1711  * @}
1712 **/
1713
1714 static void display_bandwidth(RtpSession *as, RtpSession *vs){
1715         ms_message("bandwidth usage: audio=[d=%.1f,u=%.1f] video=[d=%.1f,u=%.1f] kbit/sec",
1716         (as!=NULL) ? (rtp_session_compute_recv_bandwidth(as)*1e-3) : 0,
1717         (as!=NULL) ? (rtp_session_compute_send_bandwidth(as)*1e-3) : 0,
1718         (vs!=NULL) ? (rtp_session_compute_recv_bandwidth(vs)*1e-3) : 0,
1719         (vs!=NULL) ? (rtp_session_compute_send_bandwidth(vs)*1e-3) : 0);
1720 }
1721
1722 static void linphone_core_disconnected(LinphoneCore *lc, LinphoneCall *call){
1723         char temp[256];
1724         char *from=NULL;
1725         if(call)
1726                 from = linphone_call_get_remote_address_as_string(call);
1727         if (from)
1728         {
1729                 snprintf(temp,sizeof(temp),"Remote end %s seems to have disconnected, the call is going to be closed.",from);
1730                 free(from);
1731         }
1732         else
1733         {
1734                 snprintf(temp,sizeof(temp),"Remote end seems to have disconnected, the call is going to be closed.");
1735         }
1736         if (lc->vtable.display_warning!=NULL)
1737                 lc->vtable.display_warning(lc,temp);
1738         linphone_core_terminate_call(lc,call);
1739 }
1740
1741 static void handle_ice_events(LinphoneCall *call, OrtpEvent *ev){
1742         OrtpEventType evt=ortp_event_get_type(ev);
1743         OrtpEventData *evd=ortp_event_get_data(ev);
1744
1745         if (evt == ORTP_EVENT_ICE_SESSION_PROCESSING_FINISHED) {
1746                 switch (ice_session_state(call->ice_session)) {
1747                         case IS_Completed:
1748                                 if (ice_session_role(call->ice_session) == IR_Controlling) {
1749                                         ice_session_select_candidates(call->ice_session);
1750                                         linphone_core_update_call(call->core, call, &call->current_params);
1751                                 }
1752                                 break;
1753                         case IS_Failed:
1754                                 if (ice_session_has_completed_check_list(call->ice_session) == TRUE) {
1755                                         if (ice_session_role(call->ice_session) == IR_Controlling) {
1756                                                 /* At least one ICE session has succeeded, so perform a call update. */
1757                                                 ice_session_select_candidates(call->ice_session);
1758                                                 linphone_core_update_call(call->core, call, &call->current_params);
1759                                         }
1760                                 }
1761                                 break;
1762                         default:
1763                                 break;
1764                 }
1765         } else if (evt == ORTP_EVENT_ICE_GATHERING_FINISHED) {
1766                 if (evd->info.ice_processing_successful==TRUE) {
1767                         ice_session_compute_candidates_foundations(call->ice_session);
1768                         ice_session_eliminate_redundant_candidates(call->ice_session);
1769                         ice_session_choose_default_candidates(call->ice_session);
1770                 } else {
1771                         ms_warning("No STUN answer from [%s], disabling ICE",linphone_core_get_stun_server(call->core));
1772                         linphone_call_delete_ice_session(call);
1773                 }
1774                 switch (call->state) {
1775                         case LinphoneCallStreamsRunning:
1776                                 linphone_core_start_update_call(call->core, call);
1777                                 break;
1778                         case LinphoneCallUpdatedByRemote:
1779                                 linphone_core_start_accept_call_update(call->core, call);
1780                                 break;
1781                         case LinphoneCallOutgoingInit:
1782                                 linphone_call_stop_media_streams(call);
1783                                 linphone_core_proceed_with_invite_if_ready(call->core, call, NULL);
1784                                 break;
1785                         default:
1786                                 linphone_call_stop_media_streams(call);
1787                                 linphone_core_notify_incoming_call(call->core, call);
1788                                 break;
1789                 }
1790         } else if (evt == ORTP_EVENT_ICE_LOSING_PAIRS_COMPLETED) {
1791                 linphone_core_start_accept_call_update(call->core, call);
1792         } else if (evt == ORTP_EVENT_ICE_RESTART_NEEDED) {
1793                 ice_session_restart(call->ice_session);
1794                 ice_session_set_role(call->ice_session, IR_Controlling);
1795                 linphone_core_update_call(call->core, call, &call->current_params);
1796         }
1797 }
1798
1799 void linphone_call_background_tasks(LinphoneCall *call, bool_t one_second_elapsed){
1800         LinphoneCore* lc = call->core;
1801         int disconnect_timeout = linphone_core_get_nortp_timeout(call->core);
1802         bool_t disconnected=FALSE;
1803
1804         if (call->state==LinphoneCallStreamsRunning && one_second_elapsed){
1805                 RtpSession *as=NULL,*vs=NULL;
1806                 float audio_load=0, video_load=0;
1807                 if (call->audiostream!=NULL){
1808                         as=call->audiostream->session;
1809                         if (call->audiostream->ticker)
1810                                 audio_load=ms_ticker_get_average_load(call->audiostream->ticker);
1811                 }
1812                 if (call->videostream!=NULL){
1813                         if (call->videostream->ticker)
1814                                 video_load=ms_ticker_get_average_load(call->videostream->ticker);
1815                         vs=call->videostream->session;
1816                 }
1817                 display_bandwidth(as,vs);
1818                 ms_message("Thread processing load: audio=%f\tvideo=%f",audio_load,video_load);
1819         }
1820 #ifdef VIDEO_ENABLED
1821         if (call->videostream!=NULL) {
1822                 OrtpEvent *ev;
1823
1824                 /* Ensure there is no dangling ICE check list. */
1825                 if (call->ice_session == NULL) call->videostream->ice_check_list = NULL;
1826
1827                 // Beware that the application queue should not depend on treatments fron the
1828                 // mediastreamer queue.
1829                 video_stream_iterate(call->videostream);
1830
1831                 while (call->videostream_app_evq && (NULL != (ev=ortp_ev_queue_get(call->videostream_app_evq)))){
1832                         OrtpEventType evt=ortp_event_get_type(ev);
1833                         OrtpEventData *evd=ortp_event_get_data(ev);
1834                         if (evt == ORTP_EVENT_ZRTP_ENCRYPTION_CHANGED){
1835                                 linphone_call_videostream_encryption_changed(call, evd->info.zrtp_stream_encrypted);
1836                         } else if (evt == ORTP_EVENT_RTCP_PACKET_RECEIVED) {
1837                                 call->stats[LINPHONE_CALL_STATS_VIDEO].round_trip_delay = rtp_session_get_round_trip_propagation(call->videostream->session);
1838                                 if(call->stats[LINPHONE_CALL_STATS_VIDEO].received_rtcp != NULL)
1839                                         freemsg(call->stats[LINPHONE_CALL_STATS_VIDEO].received_rtcp);
1840                                 call->stats[LINPHONE_CALL_STATS_VIDEO].received_rtcp = evd->packet;
1841                                 evd->packet = NULL;
1842                                 if (lc->vtable.call_stats_updated)
1843                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_VIDEO]);
1844                         } else if (evt == ORTP_EVENT_RTCP_PACKET_EMITTED) {
1845                                 memcpy(&call->stats[LINPHONE_CALL_STATS_VIDEO].jitter_stats, rtp_session_get_jitter_stats(call->videostream->session), sizeof(jitter_stats_t));
1846                                 if(call->stats[LINPHONE_CALL_STATS_VIDEO].sent_rtcp != NULL)
1847                                         freemsg(call->stats[LINPHONE_CALL_STATS_VIDEO].sent_rtcp);
1848                                 call->stats[LINPHONE_CALL_STATS_VIDEO].sent_rtcp = evd->packet;
1849                                 evd->packet = NULL;
1850                                 if (lc->vtable.call_stats_updated)
1851                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_VIDEO]);
1852                         } else if ((evt == ORTP_EVENT_ICE_SESSION_PROCESSING_FINISHED) || (evt == ORTP_EVENT_ICE_GATHERING_FINISHED)
1853                                 || (evt == ORTP_EVENT_ICE_LOSING_PAIRS_COMPLETED) || (evt == ORTP_EVENT_ICE_RESTART_NEEDED)) {
1854                                 handle_ice_events(call, ev);
1855                         }
1856                         ortp_event_destroy(ev);
1857                 }
1858         }
1859 #endif
1860         if (call->audiostream!=NULL) {
1861                 OrtpEvent *ev;
1862
1863                 /* Ensure there is no dangling ICE check list. */
1864                 if (call->ice_session == NULL) call->audiostream->ice_check_list = NULL;
1865
1866                 // Beware that the application queue should not depend on treatments fron the
1867                 // mediastreamer queue.
1868                 audio_stream_iterate(call->audiostream);
1869
1870                 while (call->audiostream_app_evq && (NULL != (ev=ortp_ev_queue_get(call->audiostream_app_evq)))){
1871                         OrtpEventType evt=ortp_event_get_type(ev);
1872                         OrtpEventData *evd=ortp_event_get_data(ev);
1873                         if (evt == ORTP_EVENT_ZRTP_ENCRYPTION_CHANGED){
1874                                 linphone_call_audiostream_encryption_changed(call, evd->info.zrtp_stream_encrypted);
1875                         } else if (evt == ORTP_EVENT_ZRTP_SAS_READY) {
1876                                 linphone_call_audiostream_auth_token_ready(call, evd->info.zrtp_sas.sas, evd->info.zrtp_sas.verified);
1877                         } else if (evt == ORTP_EVENT_RTCP_PACKET_RECEIVED) {
1878                                 call->stats[LINPHONE_CALL_STATS_AUDIO].round_trip_delay = rtp_session_get_round_trip_propagation(call->audiostream->session);
1879                                 if(call->stats[LINPHONE_CALL_STATS_AUDIO].received_rtcp != NULL)
1880                                         freemsg(call->stats[LINPHONE_CALL_STATS_AUDIO].received_rtcp);
1881                                 call->stats[LINPHONE_CALL_STATS_AUDIO].received_rtcp = evd->packet;
1882                                 evd->packet = NULL;
1883                                 if (lc->vtable.call_stats_updated)
1884                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_AUDIO]);
1885                         } else if (evt == ORTP_EVENT_RTCP_PACKET_EMITTED) {
1886                                 memcpy(&call->stats[LINPHONE_CALL_STATS_AUDIO].jitter_stats, rtp_session_get_jitter_stats(call->audiostream->session), sizeof(jitter_stats_t));
1887                                 if(call->stats[LINPHONE_CALL_STATS_AUDIO].sent_rtcp != NULL)
1888                                         freemsg(call->stats[LINPHONE_CALL_STATS_AUDIO].sent_rtcp);
1889                                 call->stats[LINPHONE_CALL_STATS_AUDIO].sent_rtcp = evd->packet;
1890                                 evd->packet = NULL;
1891                                 if (lc->vtable.call_stats_updated)
1892                                         lc->vtable.call_stats_updated(lc, call, &call->stats[LINPHONE_CALL_STATS_AUDIO]);
1893                         } else if ((evt == ORTP_EVENT_ICE_SESSION_PROCESSING_FINISHED) || (evt == ORTP_EVENT_ICE_GATHERING_FINISHED)
1894                                 || (evt == ORTP_EVENT_ICE_LOSING_PAIRS_COMPLETED) || (evt == ORTP_EVENT_ICE_RESTART_NEEDED)) {
1895                                 handle_ice_events(call, ev);
1896                         }
1897                         ortp_event_destroy(ev);
1898                 }
1899         }
1900         if (call->state==LinphoneCallStreamsRunning && one_second_elapsed && call->audiostream!=NULL && disconnect_timeout>0 )
1901                 disconnected=!audio_stream_alive(call->audiostream,disconnect_timeout);
1902         if (disconnected)
1903                 linphone_core_disconnected(call->core,call);
1904 }
1905
1906 void linphone_call_log_completed(LinphoneCall *call){
1907         LinphoneCore *lc=call->core;
1908
1909         call->log->duration=time(NULL)-call->start_time;
1910
1911         if (call->log->status==LinphoneCallMissed){
1912                 char *info;
1913                 lc->missed_calls++;
1914                 info=ortp_strdup_printf(ngettext("You have missed %i call.",
1915                                          "You have missed %i calls.", lc->missed_calls),
1916                                 lc->missed_calls);
1917         if (lc->vtable.display_status!=NULL)
1918             lc->vtable.display_status(lc,info);
1919                 ms_free(info);
1920         }
1921         lc->call_logs=ms_list_prepend(lc->call_logs,(void *)call->log);
1922         if (ms_list_size(lc->call_logs)>lc->max_call_logs){
1923                 MSList *elem,*prevelem=NULL;
1924                 /*find the last element*/
1925                 for(elem=lc->call_logs;elem!=NULL;elem=elem->next){
1926                         prevelem=elem;
1927                 }
1928                 elem=prevelem;
1929                 linphone_call_log_destroy((LinphoneCallLog*)elem->data);
1930                 lc->call_logs=ms_list_remove_link(lc->call_logs,elem);
1931         }
1932         if (lc->vtable.call_log_updated!=NULL){
1933                 lc->vtable.call_log_updated(lc,call->log);
1934         }
1935         call_logs_write_to_config_file(lc);
1936 }
1937
1938 LinphoneCallState linphone_call_get_transfer_state(LinphoneCall *call) {
1939         return call->transfer_state;
1940 }
1941
1942 void linphone_call_set_transfer_state(LinphoneCall* call, LinphoneCallState state) {
1943         if (state != call->transfer_state) {
1944                 LinphoneCore* lc = call->core;
1945                 call->transfer_state = state;
1946                 if (lc->vtable.transfer_state_changed)
1947                         lc->vtable.transfer_state_changed(lc, call, state);
1948         }
1949 }
1950
1951 bool_t linphone_call_is_in_conference(const LinphoneCall *call) {
1952         return call->params.in_conference;
1953 }