src/third_party/libjingle/source/talk/session/media/call.cc

   1 /*
   2  * libjingle
   3  * Copyright 2004 Google Inc.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *
   8  *  1. Redistributions of source code must retain the above copyright notice,
   9  *     this list of conditions and the following disclaimer.
  10  *  2. Redistributions in binary form must reproduce the above copyright notice,
  11  *     this list of conditions and the following disclaimer in the documentation
  12  *     and/or other materials provided with the distribution.
  13  *  3. The name of the author may not be used to endorse or promote products
  14  *     derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include <string>
  29 #include "talk/media/base/constants.h"
  30 #include "talk/media/base/screencastid.h"
  31 #include "talk/p2p/base/parsing.h"
  32 #include "talk/session/media/call.h"
  33 #include "talk/session/media/currentspeakermonitor.h"
  34 #include "talk/session/media/mediasessionclient.h"
  35 #include "webrtc/base/helpers.h"
  36 #include "webrtc/base/logging.h"
  37 #include "webrtc/base/thread.h"
  38 #include "webrtc/base/window.h"
  39
  40 namespace cricket {
  41
  42 const uint32 MSG_CHECKAUTODESTROY = 1;
  43 const uint32 MSG_TERMINATECALL = 2;
  44 const uint32 MSG_PLAYDTMF = 3;
  45
  46 namespace {
  47 const int kDTMFDelay = 300;  // msec
  48 const size_t kMaxDTMFDigits = 30;
  49 const int kSendToVoicemailTimeout = 1000*20;
  50 const int kNoVoicemailTimeout = 1000*180;
  51 const int kMediaMonitorInterval = 1000*15;
  52 // In order to be the same as the server-side switching, this must be 100.
  53 const int kAudioMonitorPollPeriodMillis = 100;
  54
  55 // V is a pointer type.
  56 template<class K, class V>
  57 V FindOrNull(const std::map<K, V>& map,
  58              const K& key) {
  59   typename std::map<K, V>::const_iterator it = map.find(key);
  60   return (it != map.end()) ? it->second : NULL;
  61 }
  62
  63
  64 bool ContentContainsCrypto(const cricket::ContentInfo* content) {
  65   if (content != NULL) {
  66     const cricket::MediaContentDescription* desc =
  67         static_cast<const cricket::MediaContentDescription*>(
  68             content->description);
  69     if (!desc || desc->cryptos().empty()) {
  70       return false;
  71     }
  72   }
  73   return true;
  74 }
  75
  76 }
  77
  78 AudioSourceProxy::AudioSourceProxy(Call* call)
  79     : call_(call) {
  80   call_->SignalAudioMonitor.connect(this, &AudioSourceProxy::OnAudioMonitor);
  81   call_->SignalMediaStreamsUpdate.connect(
  82       this, &AudioSourceProxy::OnMediaStreamsUpdate);
  83 }
  84
  85 void AudioSourceProxy::OnAudioMonitor(Call* call, const AudioInfo& info) {
  86   SignalAudioMonitor(this, info);
  87 }
  88
  89 void AudioSourceProxy::OnMediaStreamsUpdate(Call* call, Session* session,
  90     const MediaStreams& added, const MediaStreams& removed) {
  91   SignalMediaStreamsUpdate(this, session, added, removed);
  92 }
  93
  94 Call::Call(MediaSessionClient* session_client)
  95     : id_(rtc::CreateRandomId()),
  96       session_client_(session_client),
  97       has_video_(false),
  98       has_data_(false),
  99       muted_(false),
 100       video_muted_(false),
 101       send_to_voicemail_(true),
 102       playing_dtmf_(false) {
 103   audio_source_proxy_.reset(new AudioSourceProxy(this));
 104 }
 105
 106 Call::~Call() {
 107   while (media_session_map_.begin() != media_session_map_.end()) {
 108     Session* session = media_session_map_.begin()->second.session;
 109     RemoveSession(session);
 110     session_client_->session_manager()->DestroySession(session);
 111   }
 112   rtc::Thread::Current()->Clear(this);
 113 }
 114
 115 Session* Call::InitiateSession(const buzz::Jid& to,
 116                                const buzz::Jid& initiator,
 117                                const CallOptions& options) {
 118   std::string id;
 119   std::string initiator_name = initiator.Str();
 120   return InternalInitiateSession(id, to, initiator_name, options);
 121 }
 122
 123 Session *Call::InitiateSession(const std::string& id,
 124                                const buzz::Jid& to,
 125                                const CallOptions& options) {
 126   std::string initiator_name;
 127   return InternalInitiateSession(id, to, initiator_name, options);
 128 }
 129
 130 void Call::IncomingSession(Session* session, const SessionDescription* offer) {
 131   AddSession(session, offer);
 132
 133   // Make sure the session knows about the incoming ssrcs. This needs to be done
 134   // prior to the SignalSessionState call, because that may trigger handling of
 135   // these new SSRCs, so they need to be registered before then.
 136   UpdateRemoteMediaStreams(session, offer->contents(), false);
 137
 138   // Missed the first state, the initiate, which is needed by
 139   // call_client.
 140   SignalSessionState(this, session, Session::STATE_RECEIVEDINITIATE);
 141 }
 142
 143 void Call::AcceptSession(Session* session,
 144                          const cricket::CallOptions& options) {
 145   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 146   if (it != media_session_map_.end()) {
 147     const SessionDescription* answer = session_client_->CreateAnswer(
 148         session->remote_description(), options);
 149     it->second.session->Accept(answer);
 150   }
 151 }
 152
 153 void Call::RejectSession(Session* session) {
 154   // Assume polite decline.
 155   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 156   if (it != media_session_map_.end())
 157     it->second.session->Reject(STR_TERMINATE_DECLINE);
 158 }
 159
 160 void Call::TerminateSession(Session* session) {
 161   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 162   if (it != media_session_map_.end()) {
 163     // Assume polite terminations.
 164     it->second.session->Terminate();
 165   }
 166 }
 167
 168 void Call::Terminate() {
 169   // Copy the list so that we can iterate over it in a stable way
 170   std::vector<Session*> sessions = this->sessions();
 171
 172   // There may be more than one session to terminate
 173   std::vector<Session*>::iterator it;
 174   for (it = sessions.begin(); it != sessions.end(); ++it) {
 175     TerminateSession(*it);
 176   }
 177 }
 178
 179 bool Call::SendViewRequest(Session* session,
 180                            const ViewRequest& view_request) {
 181   StaticVideoViews::const_iterator it;
 182   for (it = view_request.static_video_views.begin();
 183        it != view_request.static_video_views.end(); ++it) {
 184     StreamParams found_stream;
 185     bool found = false;
 186     MediaStreams* recv_streams = GetMediaStreams(session);
 187     if (recv_streams)
 188       found = recv_streams->GetVideoStream(it->selector, &found_stream);
 189     if (!found) {
 190       LOG(LS_WARNING) << "Trying to send view request for ("
 191                       << it->selector.ssrc << ", '"
 192                       << it->selector.groupid << "', '"
 193                       << it->selector.streamid << "'"
 194                       << ") is not in the local streams.";
 195       return false;
 196     }
 197   }
 198
 199   XmlElements elems;
 200   WriteError error;
 201   if (!WriteJingleViewRequest(CN_VIDEO, view_request, &elems, &error)) {
 202     LOG(LS_ERROR) << "Couldn't write out view request: " << error.text;
 203     return false;
 204   }
 205
 206   return session->SendInfoMessage(elems, session->remote_name());
 207 }
 208
 209 void Call::SetVideoRenderer(Session* session, uint32 ssrc,
 210                             VideoRenderer* renderer) {
 211   VideoChannel* video_channel = GetVideoChannel(session);
 212   if (video_channel) {
 213     video_channel->SetRenderer(ssrc, renderer);
 214     LOG(LS_INFO) << "Set renderer of ssrc " << ssrc
 215                  << " to " << renderer << ".";
 216   } else {
 217     LOG(LS_INFO) << "Failed to set renderer of ssrc " << ssrc << ".";
 218   }
 219 }
 220
 221 void Call::OnMessage(rtc::Message* message) {
 222   switch (message->message_id) {
 223   case MSG_CHECKAUTODESTROY:
 224     // If no more sessions for this call, delete it
 225     if (media_session_map_.empty())
 226       session_client_->DestroyCall(this);
 227     break;
 228   case MSG_TERMINATECALL:
 229     // Signal to the user that a timeout has happened and the call should
 230     // be sent to voicemail.
 231     if (send_to_voicemail_) {
 232       SignalSetupToCallVoicemail();
 233     }
 234
 235     // Callee didn't answer - terminate call
 236     Terminate();
 237     break;
 238   case MSG_PLAYDTMF:
 239     ContinuePlayDTMF();
 240   }
 241 }
 242
 243 std::vector<Session*> Call::sessions() {
 244   std::vector<Session*> sessions;
 245   MediaSessionMap::iterator it;
 246   for (it = media_session_map_.begin(); it != media_session_map_.end(); ++it)
 247     sessions.push_back(it->second.session);
 248
 249   return sessions;
 250 }
 251
 252 bool Call::AddSession(Session* session, const SessionDescription* offer) {
 253   bool succeeded = true;
 254   MediaSession media_session;
 255   media_session.session = session;
 256   media_session.voice_channel = NULL;
 257   media_session.video_channel = NULL;
 258   media_session.data_channel = NULL;
 259   media_session.recv_streams = NULL;
 260
 261   const ContentInfo* audio_offer = GetFirstAudioContent(offer);
 262   const ContentInfo* video_offer = GetFirstVideoContent(offer);
 263   const ContentInfo* data_offer = GetFirstDataContent(offer);
 264   has_video_ = (video_offer != NULL);
 265   has_data_ = (data_offer != NULL);
 266
 267   ASSERT(audio_offer != NULL);
 268   // Create voice channel and start a media monitor.
 269   media_session.voice_channel =
 270       session_client_->channel_manager()->CreateVoiceChannel(
 271           session, audio_offer->name, has_video_);
 272   // voice_channel can be NULL in case of NullVoiceEngine.
 273   if (media_session.voice_channel) {
 274     media_session.voice_channel->SignalMediaMonitor.connect(
 275         this, &Call::OnMediaMonitor);
 276     media_session.voice_channel->StartMediaMonitor(kMediaMonitorInterval);
 277   } else {
 278     succeeded = false;
 279   }
 280
 281   // If desired, create video channel and start a media monitor.
 282   if (has_video_ && succeeded) {
 283     media_session.video_channel =
 284         session_client_->channel_manager()->CreateVideoChannel(
 285             session, video_offer->name, true, media_session.voice_channel);
 286     // video_channel can be NULL in case of NullVideoEngine.
 287     if (media_session.video_channel) {
 288       media_session.video_channel->SignalMediaMonitor.connect(
 289           this, &Call::OnMediaMonitor);
 290       media_session.video_channel->StartMediaMonitor(kMediaMonitorInterval);
 291     } else {
 292       succeeded = false;
 293     }
 294   }
 295
 296   // If desired, create data channel.
 297   if (has_data_ && succeeded) {
 298     const DataContentDescription* data = GetFirstDataContentDescription(offer);
 299     if (data == NULL) {
 300       succeeded = false;
 301     } else {
 302       DataChannelType data_channel_type = DCT_RTP;
 303       if ((data->protocol() == kMediaProtocolSctp) ||
 304           (data->protocol() == kMediaProtocolDtlsSctp)) {
 305         data_channel_type = DCT_SCTP;
 306       }
 307
 308       bool rtcp = false;
 309       media_session.data_channel =
 310           session_client_->channel_manager()->CreateDataChannel(
 311               session, data_offer->name, rtcp, data_channel_type);
 312       if (media_session.data_channel) {
 313         media_session.data_channel->SignalDataReceived.connect(
 314             this, &Call::OnDataReceived);
 315       } else {
 316         succeeded = false;
 317       }
 318     }
 319   }
 320
 321   if (succeeded) {
 322     // Add session to list, create channels for this session.
 323     media_session.recv_streams = new MediaStreams;
 324     media_session_map_[session->id()] = media_session;
 325     session->SignalState.connect(this, &Call::OnSessionState);
 326     session->SignalError.connect(this, &Call::OnSessionError);
 327     session->SignalInfoMessage.connect(
 328         this, &Call::OnSessionInfoMessage);
 329     session->SignalRemoteDescriptionUpdate.connect(
 330         this, &Call::OnRemoteDescriptionUpdate);
 331     session->SignalReceivedTerminateReason
 332       .connect(this, &Call::OnReceivedTerminateReason);
 333
 334     // If this call has the focus, enable this session's channels.
 335     if (session_client_->GetFocus() == this) {
 336       EnableSessionChannels(session, true);
 337     }
 338
 339     // Signal client.
 340     SignalAddSession(this, session);
 341   }
 342
 343   return succeeded;
 344 }
 345
 346 void Call::RemoveSession(Session* session) {
 347   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 348   if (it == media_session_map_.end())
 349     return;
 350
 351   // Remove all the screencasts, if they haven't been already.
 352   while (!it->second.started_screencasts.empty()) {
 353     uint32 ssrc = it->second.started_screencasts.begin()->first;
 354     if (!StopScreencastWithoutSendingUpdate(it->second.session, ssrc)) {
 355       LOG(LS_ERROR) << "Unable to stop screencast with ssrc " << ssrc;
 356       ASSERT(false);
 357     }
 358   }
 359
 360   // Destroy video channel
 361   VideoChannel* video_channel = it->second.video_channel;
 362   if (video_channel != NULL)
 363     session_client_->channel_manager()->DestroyVideoChannel(video_channel);
 364
 365   // Destroy voice channel
 366   VoiceChannel* voice_channel = it->second.voice_channel;
 367   if (voice_channel != NULL)
 368     session_client_->channel_manager()->DestroyVoiceChannel(voice_channel);
 369
 370   // Destroy data channel
 371   DataChannel* data_channel = it->second.data_channel;
 372   if (data_channel != NULL)
 373     session_client_->channel_manager()->DestroyDataChannel(data_channel);
 374
 375   delete it->second.recv_streams;
 376   media_session_map_.erase(it);
 377
 378   // Destroy speaker monitor
 379   StopSpeakerMonitor(session);
 380
 381   // Signal client
 382   SignalRemoveSession(this, session);
 383
 384   // The call auto destroys when the last session is removed
 385   rtc::Thread::Current()->Post(this, MSG_CHECKAUTODESTROY);
 386 }
 387
 388 VoiceChannel* Call::GetVoiceChannel(Session* session) const {
 389   MediaSessionMap::const_iterator it = media_session_map_.find(session->id());
 390   return (it != media_session_map_.end()) ? it->second.voice_channel : NULL;
 391 }
 392
 393 VideoChannel* Call::GetVideoChannel(Session* session) const {
 394   MediaSessionMap::const_iterator it = media_session_map_.find(session->id());
 395   return (it != media_session_map_.end()) ? it->second.video_channel : NULL;
 396 }
 397
 398 DataChannel* Call::GetDataChannel(Session* session) const {
 399   MediaSessionMap::const_iterator it = media_session_map_.find(session->id());
 400   return (it != media_session_map_.end()) ? it->second.data_channel : NULL;
 401 }
 402
 403 MediaStreams* Call::GetMediaStreams(Session* session) const {
 404   MediaSessionMap::const_iterator it = media_session_map_.find(session->id());
 405   return (it != media_session_map_.end()) ? it->second.recv_streams : NULL;
 406 }
 407
 408 void Call::EnableChannels(bool enable) {
 409   MediaSessionMap::iterator it;
 410   for (it = media_session_map_.begin(); it != media_session_map_.end(); ++it) {
 411     EnableSessionChannels(it->second.session, enable);
 412   }
 413 }
 414
 415 void Call::EnableSessionChannels(Session* session, bool enable) {
 416   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 417   if (it == media_session_map_.end())
 418     return;
 419
 420   VoiceChannel* voice_channel = it->second.voice_channel;
 421   VideoChannel* video_channel = it->second.video_channel;
 422   DataChannel* data_channel = it->second.data_channel;
 423   if (voice_channel != NULL)
 424     voice_channel->Enable(enable);
 425   if (video_channel != NULL)
 426     video_channel->Enable(enable);
 427   if (data_channel != NULL)
 428     data_channel->Enable(enable);
 429 }
 430
 431 void Call::Mute(bool mute) {
 432   muted_ = mute;
 433   MediaSessionMap::iterator it;
 434   for (it = media_session_map_.begin(); it != media_session_map_.end(); ++it) {
 435     if (it->second.voice_channel != NULL)
 436       it->second.voice_channel->MuteStream(0, mute);
 437   }
 438 }
 439
 440 void Call::MuteVideo(bool mute) {
 441   video_muted_ = mute;
 442   MediaSessionMap::iterator it;
 443   for (it = media_session_map_.begin(); it != media_session_map_.end(); ++it) {
 444     if (it->second.video_channel != NULL)
 445       it->second.video_channel->MuteStream(0, mute);
 446   }
 447 }
 448
 449 bool Call::SendData(Session* session,
 450                     const SendDataParams& params,
 451                     const rtc::Buffer& payload,
 452                     SendDataResult* result) {
 453   DataChannel* data_channel = GetDataChannel(session);
 454   if (!data_channel) {
 455     LOG(LS_WARNING) << "Could not send data: no data channel.";
 456     return false;
 457   }
 458
 459   return data_channel->SendData(params, payload, result);
 460 }
 461
 462 void Call::PressDTMF(int event) {
 463   // Queue up this digit
 464   if (queued_dtmf_.size() < kMaxDTMFDigits) {
 465     LOG(LS_INFO) << "Call::PressDTMF(" << event << ")";
 466
 467     queued_dtmf_.push_back(event);
 468
 469     if (!playing_dtmf_) {
 470       ContinuePlayDTMF();
 471     }
 472   }
 473 }
 474
 475 cricket::VideoFormat ScreencastFormatFromFps(int fps) {
 476   // The capturer pretty much ignore this, but just in case we give it
 477   // a resolution big enough to cover any expected desktop.  In any
 478   // case, it can't be 0x0, or the CaptureManager will fail to use it.
 479   return cricket::VideoFormat(
 480       1, 1,
 481       cricket::VideoFormat::FpsToInterval(fps), cricket::FOURCC_ANY);
 482 }
 483
 484 bool Call::StartScreencast(Session* session,
 485                            const std::string& streamid, uint32 ssrc,
 486                            const ScreencastId& screenid, int fps) {
 487   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 488   if (it == media_session_map_.end()) {
 489     return false;
 490   }
 491
 492   VideoChannel *video_channel = GetVideoChannel(session);
 493   if (!video_channel) {
 494     LOG(LS_WARNING) << "Cannot add screencast"
 495                     << " because there is no video channel.";
 496     return false;
 497   }
 498
 499   VideoCapturer* capturer = session_client_->channel_manager()->
 500       CreateScreenCapturer(screenid);
 501   if (!capturer) {
 502     LOG(LS_WARNING) << "Could not create screencast capturer.";
 503     return false;
 504   }
 505
 506   if (!video_channel->AddScreencast(ssrc, capturer)) {
 507     delete capturer;
 508     LOG(LS_WARNING) << "Could not add screencast capturer.";
 509     return false;
 510   }
 511
 512   VideoFormat format = ScreencastFormatFromFps(fps);
 513   if (!session_client_->channel_manager()->StartVideoCapture(
 514           capturer, format)) {
 515     LOG(LS_WARNING) << "Could not start video capture.";
 516     video_channel->RemoveScreencast(ssrc);
 517     return false;
 518   }
 519
 520   if (!video_channel->SetCapturer(ssrc, capturer)) {
 521     LOG(LS_WARNING) << "Could not start sending screencast.";
 522     session_client_->channel_manager()->StopVideoCapture(
 523         capturer, ScreencastFormatFromFps(fps));
 524     video_channel->RemoveScreencast(ssrc);
 525   }
 526
 527   // TODO(pthatcher): Once the CaptureManager has a nicer interface
 528   // for removing captures (such as having StartCapture return a
 529   // handle), remove this StartedCapture stuff.
 530   it->second.started_screencasts.insert(
 531       std::make_pair(ssrc, StartedCapture(capturer, format)));
 532
 533   // TODO(pthatcher): Verify we aren't re-using an existing id or
 534   // ssrc.
 535   StreamParams stream;
 536   stream.id = streamid;
 537   stream.ssrcs.push_back(ssrc);
 538   VideoContentDescription* video = CreateVideoStreamUpdate(stream);
 539
 540   // TODO(pthatcher): Wait until view request before sending video.
 541   video_channel->SetLocalContent(video, CA_UPDATE, NULL);
 542   SendVideoStreamUpdate(session, video);
 543   return true;
 544 }
 545
 546 bool Call::StopScreencast(Session* session,
 547                           const std::string& streamid, uint32 ssrc) {
 548   if (!StopScreencastWithoutSendingUpdate(session, ssrc)) {
 549     return false;
 550   }
 551
 552   VideoChannel *video_channel = GetVideoChannel(session);
 553   if (!video_channel) {
 554     LOG(LS_WARNING) << "Cannot add screencast"
 555                     << " because there is no video channel.";
 556     return false;
 557   }
 558
 559   StreamParams stream;
 560   stream.id = streamid;
 561   // No ssrcs
 562   VideoContentDescription* video = CreateVideoStreamUpdate(stream);
 563
 564   video_channel->SetLocalContent(video, CA_UPDATE, NULL);
 565   SendVideoStreamUpdate(session, video);
 566   return true;
 567 }
 568
 569 bool Call::StopScreencastWithoutSendingUpdate(
 570     Session* session, uint32 ssrc) {
 571   MediaSessionMap::iterator it = media_session_map_.find(session->id());
 572   if (it == media_session_map_.end()) {
 573     return false;
 574   }
 575
 576   VideoChannel *video_channel = GetVideoChannel(session);
 577   if (!video_channel) {
 578     LOG(LS_WARNING) << "Cannot remove screencast"
 579                     << " because there is no video channel.";
 580     return false;
 581   }
 582
 583   StartedScreencastMap::const_iterator screencast_iter =
 584       it->second.started_screencasts.find(ssrc);
 585   if (screencast_iter == it->second.started_screencasts.end()) {
 586     LOG(LS_WARNING) << "Could not stop screencast " << ssrc
 587                     << " because there is no capturer.";
 588     return false;
 589   }
 590
 591   VideoCapturer* capturer = screencast_iter->second.capturer;
 592   VideoFormat format = screencast_iter->second.format;
 593   video_channel->SetCapturer(ssrc, NULL);
 594   if (!session_client_->channel_manager()->StopVideoCapture(
 595           capturer, format)) {
 596     LOG(LS_WARNING) << "Could not stop screencast " << ssrc
 597                     << " because could not stop capture.";
 598     return false;
 599   }
 600   video_channel->RemoveScreencast(ssrc);
 601   it->second.started_screencasts.erase(ssrc);
 602   return true;
 603 }
 604
 605 VideoContentDescription* Call::CreateVideoStreamUpdate(
 606     const StreamParams& stream) {
 607   VideoContentDescription* video = new VideoContentDescription();
 608   video->set_multistream(true);
 609   video->set_partial(true);
 610   video->AddStream(stream);
 611   return video;
 612 }
 613
 614 void Call::SendVideoStreamUpdate(
 615     Session* session, VideoContentDescription* video) {
 616   // Takes the ownership of |video|.
 617   rtc::scoped_ptr<VideoContentDescription> description(video);
 618   const ContentInfo* video_info =
 619       GetFirstVideoContent(session->local_description());
 620   if (video_info == NULL) {
 621     LOG(LS_WARNING) << "Cannot send stream update for video.";
 622     return;
 623   }
 624
 625   std::vector<ContentInfo> contents;
 626   contents.push_back(
 627       ContentInfo(video_info->name, video_info->type, description.get()));
 628
 629   session->SendDescriptionInfoMessage(contents);
 630 }
 631
 632 void Call::ContinuePlayDTMF() {
 633   playing_dtmf_ = false;
 634
 635   // Check to see if we have a queued tone
 636   if (queued_dtmf_.size() > 0) {
 637     playing_dtmf_ = true;
 638
 639     int tone = queued_dtmf_.front();
 640     queued_dtmf_.pop_front();
 641
 642     LOG(LS_INFO) << "Call::ContinuePlayDTMF(" << tone << ")";
 643     for (MediaSessionMap::iterator it = media_session_map_.begin();
 644          it != media_session_map_.end(); ++it) {
 645       if (it->second.voice_channel != NULL) {
 646         it->second.voice_channel->PressDTMF(tone, true);
 647       }
 648     }
 649
 650     // Post a message to play the next tone or at least clear the playing_dtmf_
 651     // bit.
 652     rtc::Thread::Current()->PostDelayed(kDTMFDelay, this, MSG_PLAYDTMF);
 653   }
 654 }
 655
 656 void Call::Join(Call* call, bool enable) {
 657   for (MediaSessionMap::iterator it = call->media_session_map_.begin();
 658        it != call->media_session_map_.end(); ++it) {
 659     // Shouldn't already exist.
 660     ASSERT(media_session_map_.find(it->first) == media_session_map_.end());
 661     media_session_map_[it->first] = it->second;
 662
 663     it->second.session->SignalState.connect(this, &Call::OnSessionState);
 664     it->second.session->SignalError.connect(this, &Call::OnSessionError);
 665     it->second.session->SignalReceivedTerminateReason
 666       .connect(this, &Call::OnReceivedTerminateReason);
 667
 668     EnableSessionChannels(it->second.session, enable);
 669   }
 670
 671   // Moved all the sessions over, so the other call should no longer have any.
 672   call->media_session_map_.clear();
 673 }
 674
 675 void Call::StartConnectionMonitor(Session* session, int cms) {
 676   VoiceChannel* voice_channel = GetVoiceChannel(session);
 677   if (voice_channel) {
 678     voice_channel->SignalConnectionMonitor.connect(this,
 679         &Call::OnConnectionMonitor);
 680     voice_channel->StartConnectionMonitor(cms);
 681   }
 682
 683   VideoChannel* video_channel = GetVideoChannel(session);
 684   if (video_channel) {
 685     video_channel->SignalConnectionMonitor.connect(this,
 686         &Call::OnConnectionMonitor);
 687     video_channel->StartConnectionMonitor(cms);
 688   }
 689 }
 690
 691 void Call::StopConnectionMonitor(Session* session) {
 692   VoiceChannel* voice_channel = GetVoiceChannel(session);
 693   if (voice_channel) {
 694     voice_channel->StopConnectionMonitor();
 695     voice_channel->SignalConnectionMonitor.disconnect(this);
 696   }
 697
 698   VideoChannel* video_channel = GetVideoChannel(session);
 699   if (video_channel) {
 700     video_channel->StopConnectionMonitor();
 701     video_channel->SignalConnectionMonitor.disconnect(this);
 702   }
 703 }
 704
 705 void Call::StartAudioMonitor(Session* session, int cms) {
 706   VoiceChannel* voice_channel = GetVoiceChannel(session);
 707   if (voice_channel) {
 708     voice_channel->SignalAudioMonitor.connect(this, &Call::OnAudioMonitor);
 709     voice_channel->StartAudioMonitor(cms);
 710   }
 711 }
 712
 713 void Call::StopAudioMonitor(Session* session) {
 714   VoiceChannel* voice_channel = GetVoiceChannel(session);
 715   if (voice_channel) {
 716     voice_channel->StopAudioMonitor();
 717     voice_channel->SignalAudioMonitor.disconnect(this);
 718   }
 719 }
 720
 721 bool Call::IsAudioMonitorRunning(Session* session) {
 722   VoiceChannel* voice_channel = GetVoiceChannel(session);
 723   if (voice_channel) {
 724     return voice_channel->IsAudioMonitorRunning();
 725   } else {
 726     return false;
 727   }
 728 }
 729
 730 void Call::StartSpeakerMonitor(Session* session) {
 731   if (speaker_monitor_map_.find(session->id()) == speaker_monitor_map_.end()) {
 732     if (!IsAudioMonitorRunning(session)) {
 733       StartAudioMonitor(session, kAudioMonitorPollPeriodMillis);
 734     }
 735     CurrentSpeakerMonitor* speaker_monitor =
 736         new cricket::CurrentSpeakerMonitor(
 737             audio_source_proxy_.get(), session);
 738     speaker_monitor->SignalUpdate.connect(this, &Call::OnSpeakerMonitor);
 739     speaker_monitor->Start();
 740     speaker_monitor_map_[session->id()] = speaker_monitor;
 741   } else {
 742     LOG(LS_WARNING) << "Already started speaker monitor for session "
 743                     << session->id() << ".";
 744   }
 745 }
 746
 747 void Call::StopSpeakerMonitor(Session* session) {
 748   if (speaker_monitor_map_.find(session->id()) == speaker_monitor_map_.end()) {
 749     LOG(LS_WARNING) << "Speaker monitor for session "
 750                     << session->id() << " already stopped.";
 751   } else {
 752     CurrentSpeakerMonitor* monitor = speaker_monitor_map_[session->id()];
 753     monitor->Stop();
 754     speaker_monitor_map_.erase(session->id());
 755     delete monitor;
 756   }
 757 }
 758
 759 void Call::OnConnectionMonitor(VoiceChannel* channel,
 760                                const std::vector<ConnectionInfo> &infos) {
 761   SignalConnectionMonitor(this, infos);
 762 }
 763
 764 void Call::OnMediaMonitor(VoiceChannel* channel, const VoiceMediaInfo& info) {
 765   last_voice_media_info_ = info;
 766   SignalMediaMonitor(this, info);
 767 }
 768
 769 void Call::OnAudioMonitor(VoiceChannel* channel, const AudioInfo& info) {
 770   SignalAudioMonitor(this, info);
 771 }
 772
 773 void Call::OnSpeakerMonitor(CurrentSpeakerMonitor* monitor, uint32 ssrc) {
 774   Session* session = static_cast<Session*>(monitor->session());
 775   MediaStreams* recv_streams = GetMediaStreams(session);
 776   if (recv_streams) {
 777     StreamParams stream;
 778     recv_streams->GetAudioStream(StreamSelector(ssrc), &stream);
 779     SignalSpeakerMonitor(this, session, stream);
 780   }
 781 }
 782
 783 void Call::OnConnectionMonitor(VideoChannel* channel,
 784                                const std::vector<ConnectionInfo> &infos) {
 785   SignalVideoConnectionMonitor(this, infos);
 786 }
 787
 788 void Call::OnMediaMonitor(VideoChannel* channel, const VideoMediaInfo& info) {
 789   SignalVideoMediaMonitor(this, info);
 790 }
 791
 792 void Call::OnDataReceived(DataChannel* channel,
 793                           const ReceiveDataParams& params,
 794                           const rtc::Buffer& payload) {
 795   SignalDataReceived(this, params, payload);
 796 }
 797
 798 uint32 Call::id() {
 799   return id_;
 800 }
 801
 802 void Call::OnSessionState(BaseSession* base_session, BaseSession::State state) {
 803   Session* session = static_cast<Session*>(base_session);
 804   switch (state) {
 805     case Session::STATE_RECEIVEDACCEPT:
 806       UpdateRemoteMediaStreams(session,
 807           session->remote_description()->contents(), false);
 808       session_client_->session_manager()->signaling_thread()->Clear(this,
 809           MSG_TERMINATECALL);
 810       break;
 811     case Session::STATE_RECEIVEDREJECT:
 812     case Session::STATE_RECEIVEDTERMINATE:
 813       session_client_->session_manager()->signaling_thread()->Clear(this,
 814           MSG_TERMINATECALL);
 815       break;
 816     default:
 817       break;
 818   }
 819   SignalSessionState(this, session, state);
 820 }
 821
 822 void Call::OnSessionError(BaseSession* base_session, Session::Error error) {
 823   session_client_->session_manager()->signaling_thread()->Clear(this,
 824       MSG_TERMINATECALL);
 825   SignalSessionError(this, static_cast<Session*>(base_session), error);
 826 }
 827
 828 void Call::OnSessionInfoMessage(Session* session,
 829                                 const buzz::XmlElement* action_elem) {
 830   if (!IsJingleViewRequest(action_elem)) {
 831     return;
 832   }
 833
 834   ViewRequest view_request;
 835   ParseError error;
 836   if (!ParseJingleViewRequest(action_elem, &view_request, &error)) {
 837     LOG(LS_WARNING) << "Failed to parse view request: " << error.text;
 838     return;
 839   }
 840
 841   VideoChannel* video_channel = GetVideoChannel(session);
 842   if (video_channel == NULL) {
 843     LOG(LS_WARNING) << "Ignore view request since we have no video channel.";
 844     return;
 845   }
 846
 847   if (!video_channel->ApplyViewRequest(view_request)) {
 848     LOG(LS_WARNING) << "Failed to ApplyViewRequest.";
 849   }
 850 }
 851
 852 void Call::OnRemoteDescriptionUpdate(BaseSession* base_session,
 853                                      const ContentInfos& updated_contents) {
 854   Session* session = static_cast<Session*>(base_session);
 855
 856   const ContentInfo* audio_content = GetFirstAudioContent(updated_contents);
 857   if (audio_content) {
 858     const AudioContentDescription* audio_update =
 859         static_cast<const AudioContentDescription*>(audio_content->description);
 860     if (!audio_update->codecs().empty()) {
 861       UpdateVoiceChannelRemoteContent(session, audio_update);
 862     }
 863   }
 864
 865   const ContentInfo* video_content = GetFirstVideoContent(updated_contents);
 866   if (video_content) {
 867     const VideoContentDescription* video_update =
 868         static_cast<const VideoContentDescription*>(video_content->description);
 869     if (!video_update->codecs().empty()) {
 870       UpdateVideoChannelRemoteContent(session, video_update);
 871     }
 872   }
 873
 874   const ContentInfo* data_content = GetFirstDataContent(updated_contents);
 875   if (data_content) {
 876     const DataContentDescription* data_update =
 877         static_cast<const DataContentDescription*>(data_content->description);
 878     if (!data_update->codecs().empty()) {
 879       UpdateDataChannelRemoteContent(session, data_update);
 880     }
 881   }
 882
 883   UpdateRemoteMediaStreams(session, updated_contents, true);
 884 }
 885
 886 bool Call::UpdateVoiceChannelRemoteContent(
 887     Session* session, const AudioContentDescription* audio) {
 888   VoiceChannel* voice_channel = GetVoiceChannel(session);
 889   if (!voice_channel->SetRemoteContent(audio, CA_UPDATE, NULL)) {
 890     const std::string error_desc =
 891         "Failure in audio SetRemoteContent with CA_UPDATE";
 892     LOG(LS_ERROR) << error_desc;
 893     session->SetError(BaseSession::ERROR_CONTENT, error_desc);
 894     return false;
 895   }
 896   return true;
 897 }
 898
 899 bool Call::UpdateVideoChannelRemoteContent(
 900     Session* session, const VideoContentDescription* video) {
 901   VideoChannel* video_channel = GetVideoChannel(session);
 902   if (!video_channel->SetRemoteContent(video, CA_UPDATE, NULL)) {
 903     const std::string error_desc =
 904         "Failure in video SetRemoteContent with CA_UPDATE";
 905     LOG(LS_ERROR) << error_desc;
 906     session->SetError(BaseSession::ERROR_CONTENT, error_desc);
 907     return false;
 908   }
 909   return true;
 910 }
 911
 912 bool Call::UpdateDataChannelRemoteContent(
 913     Session* session, const DataContentDescription* data) {
 914   DataChannel* data_channel = GetDataChannel(session);
 915   if (!data_channel->SetRemoteContent(data, CA_UPDATE, NULL)) {
 916     const std::string error_desc =
 917         "Failure in data SetRemoteContent with CA_UPDATE";
 918     LOG(LS_ERROR) << error_desc;
 919     session->SetError(BaseSession::ERROR_CONTENT, error_desc);
 920     return false;
 921   }
 922   return true;
 923 }
 924
 925 void Call::UpdateRemoteMediaStreams(Session* session,
 926                                     const ContentInfos& updated_contents,
 927                                     bool update_channels) {
 928   MediaStreams* recv_streams = GetMediaStreams(session);
 929   if (!recv_streams)
 930     return;
 931
 932   cricket::MediaStreams added_streams;
 933   cricket::MediaStreams removed_streams;
 934
 935   const ContentInfo* audio_content = GetFirstAudioContent(updated_contents);
 936   if (audio_content) {
 937     const AudioContentDescription* audio_update =
 938         static_cast<const AudioContentDescription*>(audio_content->description);
 939     UpdateRecvStreams(audio_update->streams(),
 940                       update_channels ? GetVoiceChannel(session) : NULL,
 941                       recv_streams->mutable_audio(),
 942                       added_streams.mutable_audio(),
 943                       removed_streams.mutable_audio());
 944   }
 945
 946   const ContentInfo* video_content = GetFirstVideoContent(updated_contents);
 947   if (video_content) {
 948     const VideoContentDescription* video_update =
 949         static_cast<const VideoContentDescription*>(video_content->description);
 950     UpdateRecvStreams(video_update->streams(),
 951                       update_channels ? GetVideoChannel(session) : NULL,
 952                       recv_streams->mutable_video(),
 953                       added_streams.mutable_video(),
 954                       removed_streams.mutable_video());
 955   }
 956
 957   const ContentInfo* data_content = GetFirstDataContent(updated_contents);
 958   if (data_content) {
 959     const DataContentDescription* data_update =
 960         static_cast<const DataContentDescription*>(data_content->description);
 961     UpdateRecvStreams(data_update->streams(),
 962                       update_channels ? GetDataChannel(session) : NULL,
 963                       recv_streams->mutable_data(),
 964                       added_streams.mutable_data(),
 965                       removed_streams.mutable_data());
 966   }
 967
 968   if (!added_streams.empty() || !removed_streams.empty()) {
 969     SignalMediaStreamsUpdate(this, session, added_streams, removed_streams);
 970   }
 971 }
 972
 973 void FindStreamChanges(const std::vector<StreamParams>& streams,
 974                        const std::vector<StreamParams>& updates,
 975                        std::vector<StreamParams>* added_streams,
 976                        std::vector<StreamParams>* removed_streams) {
 977   for (std::vector<StreamParams>::const_iterator update = updates.begin();
 978        update != updates.end(); ++update) {
 979     StreamParams stream;
 980     if (GetStreamByIds(streams, update->groupid, update->id, &stream)) {
 981       if (!update->has_ssrcs()) {
 982         removed_streams->push_back(stream);
 983       }
 984     } else {
 985       // There's a bug on reflector that will send <stream>s even
 986       // though there is not ssrc (which means there isn't really a
 987       // stream).  To work around it, we simply ignore new <stream>s
 988       // that don't have any ssrcs.
 989       if (update->has_ssrcs()) {
 990         added_streams->push_back(*update);
 991       }
 992     }
 993   }
 994 }
 995
 996 void Call::UpdateRecvStreams(const std::vector<StreamParams>& update_streams,
 997                              BaseChannel* channel,
 998                              std::vector<StreamParams>* recv_streams,
 999                              std::vector<StreamParams>* added_streams,
1000                              std::vector<StreamParams>* removed_streams) {
1001   FindStreamChanges(*recv_streams,
1002                     update_streams, added_streams, removed_streams);
1003   AddRecvStreams(*added_streams,
1004                  channel, recv_streams);
1005   RemoveRecvStreams(*removed_streams,
1006                     channel, recv_streams);
1007 }
1008
1009 void Call::AddRecvStreams(const std::vector<StreamParams>& added_streams,
1010                           BaseChannel* channel,
1011                           std::vector<StreamParams>* recv_streams) {
1012   std::vector<StreamParams>::const_iterator stream;
1013   for (stream = added_streams.begin();
1014        stream != added_streams.end();
1015        ++stream) {
1016     AddRecvStream(*stream, channel, recv_streams);
1017   }
1018 }
1019
1020 void Call::AddRecvStream(const StreamParams& stream,
1021                          BaseChannel* channel,
1022                          std::vector<StreamParams>* recv_streams) {
1023   if (channel && stream.has_ssrcs()) {
1024     channel->AddRecvStream(stream);
1025   }
1026   recv_streams->push_back(stream);
1027 }
1028
1029 void Call::RemoveRecvStreams(const std::vector<StreamParams>& removed_streams,
1030                              BaseChannel* channel,
1031                              std::vector<StreamParams>* recv_streams) {
1032   std::vector<StreamParams>::const_iterator stream;
1033   for (stream = removed_streams.begin();
1034        stream != removed_streams.end();
1035        ++stream) {
1036     RemoveRecvStream(*stream, channel, recv_streams);
1037   }
1038 }
1039
1040 void Call::RemoveRecvStream(const StreamParams& stream,
1041                             BaseChannel* channel,
1042                             std::vector<StreamParams>* recv_streams) {
1043   if (channel && stream.has_ssrcs()) {
1044     // TODO(pthatcher): Change RemoveRecvStream to take a stream argument.
1045     channel->RemoveRecvStream(stream.first_ssrc());
1046   }
1047   RemoveStreamByIds(recv_streams, stream.groupid, stream.id);
1048 }
1049
1050 void Call::OnReceivedTerminateReason(Session* session,
1051                                      const std::string& reason) {
1052   session_client_->session_manager()->signaling_thread()->Clear(this,
1053     MSG_TERMINATECALL);
1054   SignalReceivedTerminateReason(this, session, reason);
1055 }
1056
1057 // TODO(mdodd): Get ride of this method since all Hangouts are using a secure
1058 // connection.
1059 bool Call::secure() const {
1060   if (session_client_->secure() == SEC_DISABLED) {
1061     return false;
1062   }
1063
1064   bool ret = true;
1065   int i = 0;
1066
1067   MediaSessionMap::const_iterator it;
1068   for (it = media_session_map_.begin(); it != media_session_map_.end(); ++it) {
1069     LOG_F(LS_VERBOSE) << "session[" << i
1070                       << "], check local and remote descriptions";
1071     i++;
1072
1073     if (!SessionDescriptionContainsCrypto(
1074             it->second.session->local_description()) ||
1075         !SessionDescriptionContainsCrypto(
1076             it->second.session->remote_description())) {
1077       ret = false;
1078       break;
1079     }
1080   }
1081
1082   LOG_F(LS_VERBOSE) << "secure=" << ret;
1083   return ret;
1084 }
1085
1086 bool Call::SessionDescriptionContainsCrypto(
1087     const SessionDescription* sdesc) const {
1088   if (sdesc == NULL) {
1089     LOG_F(LS_VERBOSE) << "sessionDescription is NULL";
1090     return false;
1091   }
1092
1093   return ContentContainsCrypto(sdesc->GetContentByName(CN_AUDIO)) &&
1094          ContentContainsCrypto(sdesc->GetContentByName(CN_VIDEO));
1095 }
1096
1097 Session* Call::InternalInitiateSession(const std::string& id,
1098                                        const buzz::Jid& to,
1099                                        const std::string& initiator_name,
1100                                        const CallOptions& options) {
1101   const SessionDescription* offer = session_client_->CreateOffer(options);
1102
1103   Session* session = session_client_->CreateSession(id, this);
1104   // Only override the initiator_name if it was manually supplied. Otherwise,
1105   // session_client_ will supply the local jid as initiator in CreateOffer.
1106   if (!initiator_name.empty()) {
1107     session->set_initiator_name(initiator_name);
1108   }
1109
1110   AddSession(session, offer);
1111   session->Initiate(to.Str(), offer);
1112
1113   // After this timeout, terminate the call because the callee isn't
1114   // answering
1115   session_client_->session_manager()->signaling_thread()->Clear(this,
1116       MSG_TERMINATECALL);
1117   session_client_->session_manager()->signaling_thread()->PostDelayed(
1118     send_to_voicemail_ ? kSendToVoicemailTimeout : kNoVoicemailTimeout,
1119     this, MSG_TERMINATECALL);
1120   return session;
1121 }
1122
1123 AudioSourceProxy* Call::GetAudioSourceProxy() {
1124   return audio_source_proxy_.get();
1125 }
1126
1127 }  // namespace cricket