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

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