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