xref: /external/chromium_org/third_party/libjingle/source/talk/examples/call/callclient.cc

/*
 * libjingle
 * Copyright 2004--2005, Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "talk/examples/call/callclient.h"

#include <string>

#include "talk/examples/call/console.h"
#include "talk/examples/call/friendinvitesendtask.h"
#include "talk/examples/call/muc.h"
#include "talk/examples/call/mucinviterecvtask.h"
#include "talk/examples/call/mucinvitesendtask.h"
#include "talk/examples/call/presencepushtask.h"
#include "talk/media/base/mediacommon.h"
#include "talk/media/base/mediaengine.h"
#include "talk/media/base/rtpdataengine.h"
#include "talk/media/base/screencastid.h"
#include "webrtc/base/helpers.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/network.h"
#include "webrtc/base/socketaddress.h"
#include "webrtc/base/stringencode.h"
#include "webrtc/base/stringutils.h"
#include "webrtc/base/thread.h"
#include "webrtc/base/windowpickerfactory.h"
#ifdef HAVE_SCTP
#include "talk/media/sctp/sctpdataengine.h"
#endif
#include "talk/media/base/videorenderer.h"
#include "talk/media/devices/devicemanager.h"
#include "talk/media/devices/videorendererfactory.h"
#include "talk/p2p/base/sessionmanager.h"
#include "talk/p2p/client/basicportallocator.h"
#include "talk/p2p/client/sessionmanagertask.h"
#include "talk/session/media/mediamessages.h"
#include "talk/session/media/mediasessionclient.h"
#include "talk/xmpp/constants.h"
#include "talk/xmpp/hangoutpubsubclient.h"
#include "talk/xmpp/mucroomconfigtask.h"
#include "talk/xmpp/mucroomlookuptask.h"
#include "talk/xmpp/pingtask.h"
#include "talk/xmpp/presenceouttask.h"

namespace {

// Must be period >= timeout.
const uint32 kPingPeriodMillis = 10000;
const uint32 kPingTimeoutMillis = 10000;

const char* DescribeStatus(buzz::PresenceStatus::Show show,
                           const std::string& desc) {
  switch (show) {
  case buzz::PresenceStatus::SHOW_XA:      return desc.c_str();
  case buzz::PresenceStatus::SHOW_ONLINE:  return "online";
  case buzz::PresenceStatus::SHOW_AWAY:    return "away";
  case buzz::PresenceStatus::SHOW_DND:     return "do not disturb";
  case buzz::PresenceStatus::SHOW_CHAT:    return "ready to chat";
  default:                                 return "offline";
  }
}

std::string GetWord(const std::vector<std::string>& words,
                    size_t index, const std::string& def) {
  if (words.size() > index) {
    return words[index];
  } else {
    return def;
  }
}

int GetInt(const std::vector<std::string>& words, size_t index, int def) {
  int val;
  if (words.size() > index && rtc::FromString(words[index], &val)) {
    return val;
  } else {
    return def;
  }
}

}  // namespace

const char* CALL_COMMANDS =
"Available commands:\n"
"\n"
"  hangup            Ends the call.\n"
"  hold              Puts the current call on hold\n"
"  calls             Lists the current calls and their sessions\n"
"  switch [call_id]  Switch to the specified call\n"
"  addsession [jid]  Add a new session to the current call.\n"
"  rmsession [sid]   Remove specified session.\n"
"  mute              Stops sending voice.\n"
"  unmute            Re-starts sending voice.\n"
"  vmute             Stops sending video.\n"
"  vunmute           Re-starts sending video.\n"
"  dtmf              Sends a DTMF tone.\n"
"  stats             Print voice stats for the current call.\n"
"  quit              Quits the application.\n"
"";

// TODO: Make present and record really work.
const char* HANGOUT_COMMANDS =
"Available MUC commands:\n"
"\n"
"  present    Starts presenting (just signalling; not actually presenting.)\n"
"  unpresent  Stops presenting (just signalling; not actually presenting.)\n"
"  record     Starts recording (just signalling; not actually recording.)\n"
"  unrecord   Stops recording (just signalling; not actually recording.)\n"
"  rmute [nick] Remote mute another participant.\n"
"  block [nick] Block another participant.\n"
"  screencast [fps] Starts screencast. \n"
"  unscreencast Stops screencast. \n"
"  quit       Quits the application.\n"
"";

const char* RECEIVE_COMMANDS =
"Available commands:\n"
"\n"
"  accept [bw] Accepts the incoming call and switches to it.\n"
"  reject  Rejects the incoming call and stays with the current call.\n"
"  quit    Quits the application.\n"
"";

const char* CONSOLE_COMMANDS =
"Available commands:\n"
"\n"
"  roster              Prints the online friends from your roster.\n"
"  friend user         Request to add a user to your roster.\n"
"  call [jid] [bw]     Initiates a call to the user[/room] with the\n"
"                      given JID and with optional bandwidth.\n"
"  vcall [jid] [bw]    Initiates a video call to the user[/room] with\n"
"                      the given JID and with optional bandwidth.\n"
"  calls               Lists the current calls\n"
"  switch [call_id]    Switch to the specified call\n"
"  join [room_jid]     Joins a multi-user-chat with room JID.\n"
"  ljoin [room_name]   Joins a MUC by looking up JID from room name.\n"
"  invite user [room]  Invites a friend to a multi-user-chat.\n"
"  leave [room]        Leaves a multi-user-chat.\n"
"  nick [nick]         Sets the nick.\n"
"  priority [int]      Sets the priority.\n"
"  getdevs             Prints the available media devices.\n"
"  quit                Quits the application.\n"
"";

void CallClient::ParseLine(const std::string& line) {
  std::vector<std::string> words;
  int start = -1;
  int state = 0;
  for (int index = 0; index <= static_cast<int>(line.size()); ++index) {
    if (state == 0) {
      if (!isspace(line[index])) {
        start = index;
        state = 1;
      }
    } else {
      ASSERT(state == 1);
      ASSERT(start >= 0);
      if (isspace(line[index])) {
        std::string word(line, start, index - start);
        words.push_back(word);
        start = -1;
        state = 0;
      }
    }
  }

  // Global commands
  const std::string& command = GetWord(words, 0, "");
  if (command == "quit") {
    Quit();
  } else if (call_ && incoming_call_) {
    if (command == "accept") {
      cricket::CallOptions options;
      options.video_bandwidth = GetInt(words, 1, cricket::kAutoBandwidth);
      options.has_video = true;
      options.data_channel_type = data_channel_type_;
      Accept(options);
    } else if (command == "reject") {
      Reject();
    } else {
      console_->PrintLine(RECEIVE_COMMANDS);
    }
  } else if (call_) {
    if (command == "hangup") {
      call_->Terminate();
    } else if (command == "hold") {
      media_client_->SetFocus(NULL);
      call_ = NULL;
    } else if (command == "addsession") {
      std::string to = GetWord(words, 1, "");
      cricket::CallOptions options;
      options.has_video = call_->has_video();
      options.video_bandwidth = cricket::kAutoBandwidth;
      options.data_channel_type = data_channel_type_;
      options.AddStream(cricket::MEDIA_TYPE_VIDEO, "", "");
      if (!InitiateAdditionalSession(to, options)) {
        console_->PrintLine("Failed to initiate additional session.");
      }
    } else if (command == "rmsession") {
      std::string id = GetWord(words, 1, "");
      TerminateAndRemoveSession(call_, id);
    } else if (command == "calls") {
      PrintCalls();
    } else if ((words.size() == 2) && (command == "switch")) {
      SwitchToCall(GetInt(words, 1, -1));
    } else if (command == "mute") {
      call_->Mute(true);
      if (InMuc()) {
        hangout_pubsub_client_->PublishAudioMuteState(true);
      }
    } else if (command == "unmute") {
      call_->Mute(false);
      if (InMuc()) {
        hangout_pubsub_client_->PublishAudioMuteState(false);
      }
    } else if (command == "vmute") {
      call_->MuteVideo(true);
      if (InMuc()) {
        hangout_pubsub_client_->PublishVideoMuteState(true);
      }
    } else if (command == "vunmute") {
      call_->MuteVideo(false);
      if (InMuc()) {
        hangout_pubsub_client_->PublishVideoMuteState(false);
      }
    } else if (command == "screencast") {
      if (screencast_ssrc_ != 0) {
        console_->PrintLine("Can't screencast twice.  Unscreencast first.");
      } else {
        std::string streamid = "screencast";
        screencast_ssrc_ = rtc::CreateRandomId();
        int fps = GetInt(words, 1, 5);  // Default to 5 fps.

        cricket::ScreencastId screencastid;
        cricket::Session* session = GetFirstSession();
        if (session && SelectFirstDesktopScreencastId(&screencastid)) {
          call_->StartScreencast(
              session, streamid, screencast_ssrc_, screencastid, fps);
        }
      }
    } else if (command == "unscreencast") {
      // TODO: Use a random ssrc
      std::string streamid = "screencast";

      cricket::Session* session = GetFirstSession();
      if (session) {
        call_->StopScreencast(session, streamid, screencast_ssrc_);
        screencast_ssrc_ = 0;
      }
    } else if (command == "present") {
      if (InMuc()) {
        hangout_pubsub_client_->PublishPresenterState(true);
      }
    } else if (command == "unpresent") {
      if (InMuc()) {
        hangout_pubsub_client_->PublishPresenterState(false);
      }
    } else if (command == "record") {
      if (InMuc()) {
        hangout_pubsub_client_->PublishRecordingState(true);
      }
    } else if (command == "unrecord") {
      if (InMuc()) {
        hangout_pubsub_client_->PublishRecordingState(false);
      }
    } else if ((command == "rmute") && (words.size() == 2)) {
      if (InMuc()) {
        const std::string& nick = words[1];
        hangout_pubsub_client_->RemoteMute(nick);
      }
    } else if ((command == "block") && (words.size() == 2)) {
      if (InMuc()) {
        const std::string& nick = words[1];
        hangout_pubsub_client_->BlockMedia(nick);
      }
    } else if (command == "senddata") {
      // "" is the default streamid.
      SendData("", words[1]);
    } else if ((command == "dtmf") && (words.size() == 2)) {
      int ev = std::string("0123456789*#").find(words[1][0]);
      call_->PressDTMF(ev);
    } else if (command == "stats") {
      PrintStats();
    } else {
      console_->PrintLine(CALL_COMMANDS);
      if (InMuc()) {
        console_->PrintLine(HANGOUT_COMMANDS);
      }
    }
  } else {
    if (command == "roster") {
      PrintRoster();
    } else if (command == "send") {
      buzz::Jid jid(words[1]);
      if (jid.IsValid()) {
        last_sent_to_ = words[1];
        SendChat(words[1], words[2]);
      } else if (!last_sent_to_.empty()) {
        SendChat(last_sent_to_, words[1]);
      } else {
        console_->PrintLine(
            "Invalid JID. JIDs should be in the form user@domain");
      }
    } else if ((words.size() == 2) && (command == "friend")) {
      InviteFriend(words[1]);
    } else if (command == "call") {
      std::string to = GetWord(words, 1, "");
      cricket::CallOptions options;
      options.data_channel_type = data_channel_type_;
      if (!PlaceCall(to, options)) {
        console_->PrintLine("Failed to initiate call.");
      }
    } else if (command == "vcall") {
      std::string to = GetWord(words, 1, "");
      int bandwidth = GetInt(words, 2, cricket::kAutoBandwidth);
      cricket::CallOptions options;
      options.has_video = true;
      options.video_bandwidth = bandwidth;
      options.data_channel_type = data_channel_type_;
      if (!PlaceCall(to, options)) {
        console_->PrintLine("Failed to initiate call.");
      }
    } else if (command == "calls") {
      PrintCalls();
    } else if ((words.size() == 2) && (command == "switch")) {
      SwitchToCall(GetInt(words, 1, -1));
    } else if (command == "join") {
      JoinMuc(GetWord(words, 1, ""));
    } else if (command == "ljoin") {
      LookupAndJoinMuc(GetWord(words, 1, ""));
    } else if ((words.size() >= 2) && (command == "invite")) {
      InviteToMuc(words[1], GetWord(words, 2, ""));
    } else if (command == "leave") {
      LeaveMuc(GetWord(words, 1, ""));
    } else if (command == "nick") {
      SetNick(GetWord(words, 1, ""));
    } else if (command == "priority") {
      int priority = GetInt(words, 1, 0);
      SetPriority(priority);
      SendStatus();
    } else if (command == "getdevs") {
      GetDevices();
    } else if ((words.size() == 2) && (command == "setvol")) {
      SetVolume(words[1]);
    } else {
      console_->PrintLine(CONSOLE_COMMANDS);
    }
  }
}

CallClient::CallClient(buzz::XmppClient* xmpp_client,
                       const std::string& caps_node, const std::string& version)
    : xmpp_client_(xmpp_client),
      worker_thread_(NULL),
      media_engine_(NULL),
      data_engine_(NULL),
      media_client_(NULL),
      call_(NULL),
      hangout_pubsub_client_(NULL),
      incoming_call_(false),
      auto_accept_(false),
      pmuc_domain_("groupchat.google.com"),
      render_(true),
      data_channel_type_(cricket::DCT_NONE),
      multisession_enabled_(false),
      local_renderer_(NULL),
      static_views_accumulated_count_(0),
      screencast_ssrc_(0),
      roster_(new RosterMap),
      portallocator_flags_(0),
      allow_local_ips_(false),
      signaling_protocol_(cricket::PROTOCOL_HYBRID),
      transport_protocol_(cricket::ICEPROTO_HYBRID),
      sdes_policy_(cricket::SEC_DISABLED),
      dtls_policy_(cricket::SEC_DISABLED),
      ssl_identity_(),
      show_roster_messages_(false) {
  xmpp_client_->SignalStateChange.connect(this, &CallClient::OnStateChange);
  my_status_.set_caps_node(caps_node);
  my_status_.set_version(version);
}

CallClient::~CallClient() {
  delete media_client_;
  delete roster_;
  delete worker_thread_;
}

const std::string CallClient::strerror(buzz::XmppEngine::Error err) {
  switch (err) {
    case buzz::XmppEngine::ERROR_NONE:
      return "";
    case buzz::XmppEngine::ERROR_XML:
      return "Malformed XML or encoding error";
    case buzz::XmppEngine::ERROR_STREAM:
      return "XMPP stream error";
    case buzz::XmppEngine::ERROR_VERSION:
      return "XMPP version error";
    case buzz::XmppEngine::ERROR_UNAUTHORIZED:
      return "User is not authorized (Check your username and password)";
    case buzz::XmppEngine::ERROR_TLS:
      return "TLS could not be negotiated";
    case buzz::XmppEngine::ERROR_AUTH:
      return "Authentication could not be negotiated";
    case buzz::XmppEngine::ERROR_BIND:
      return "Resource or session binding could not be negotiated";
    case buzz::XmppEngine::ERROR_CONNECTION_CLOSED:
      return "Connection closed by output handler.";
    case buzz::XmppEngine::ERROR_DOCUMENT_CLOSED:
      return "Closed by </stream:stream>";
    case buzz::XmppEngine::ERROR_SOCKET:
      return "Socket error";
    default:
      return "Unknown error";
  }
}

void CallClient::OnCallDestroy(cricket::Call* call) {
  RemoveCallsStaticRenderedViews(call);
  if (call == call_) {
    if (local_renderer_) {
      delete local_renderer_;
      local_renderer_ = NULL;
    }
    console_->PrintLine("call destroyed");
    call_ = NULL;
    delete hangout_pubsub_client_;
    hangout_pubsub_client_ = NULL;
  }
}

void CallClient::OnStateChange(buzz::XmppEngine::State state) {
  switch (state) {
    case buzz::XmppEngine::STATE_START:
      console_->PrintLine("connecting...");
      break;
    case buzz::XmppEngine::STATE_OPENING:
      console_->PrintLine("logging in...");
      break;
    case buzz::XmppEngine::STATE_OPEN:
      console_->PrintLine("logged in...");
      InitMedia();
      InitPresence();
      break;
    case buzz::XmppEngine::STATE_CLOSED:
      {
        buzz::XmppEngine::Error error = xmpp_client_->GetError(NULL);
        console_->PrintLine("logged out... %s", strerror(error).c_str());
        Quit();
      }
      break;
    default:
      break;
  }
}

void CallClient::InitMedia() {
  worker_thread_ = new rtc::Thread();
  // The worker thread must be started here since initialization of
  // the ChannelManager will generate messages that need to be
  // dispatched by it.
  worker_thread_->Start();

  // TODO: It looks like we are leaking many objects. E.g.
  // |network_manager_| is never deleted.
  network_manager_ = new rtc::BasicNetworkManager();

  // TODO: Decide if the relay address should be specified here.
  rtc::SocketAddress stun_addr("stun.l.google.com", 19302);
  cricket::ServerAddresses stun_servers;
  stun_servers.insert(stun_addr);
  port_allocator_ =  new cricket::BasicPortAllocator(
      network_manager_, stun_servers, rtc::SocketAddress(),
      rtc::SocketAddress(), rtc::SocketAddress());

  if (portallocator_flags_ != 0) {
    port_allocator_->set_flags(portallocator_flags_);
  }
  session_manager_ = new cricket::SessionManager(
      port_allocator_, worker_thread_);
  session_manager_->set_secure(dtls_policy_);
  session_manager_->set_identity(ssl_identity_.get());
  session_manager_->set_transport_protocol(transport_protocol_);
  session_manager_->SignalRequestSignaling.connect(
      this, &CallClient::OnRequestSignaling);
  session_manager_->SignalSessionCreate.connect(
      this, &CallClient::OnSessionCreate);
  session_manager_->OnSignalingReady();

  session_manager_task_ =
      new cricket::SessionManagerTask(xmpp_client_, session_manager_);
  session_manager_task_->EnableOutgoingMessages();
  session_manager_task_->Start();

  if (!media_engine_) {
    media_engine_ = cricket::MediaEngineFactory::Create();
  }

  if (!data_engine_) {
    if (data_channel_type_ == cricket::DCT_SCTP) {
#ifdef HAVE_SCTP
      data_engine_ = new cricket::SctpDataEngine();
#else
      LOG(LS_WARNING) << "SCTP Data Engine not supported.";
      data_channel_type_ = cricket::DCT_NONE;
      data_engine_ = new cricket::RtpDataEngine();
#endif
    } else {
      // Even if we have DCT_NONE, we still have a data engine, just
      // to make sure it isn't NULL.
      data_engine_ = new cricket::RtpDataEngine();
    }
  }

  media_client_ = new cricket::MediaSessionClient(
      xmpp_client_->jid(),
      session_manager_,
      media_engine_,
      data_engine_,
      cricket::DeviceManagerFactory::Create());
  media_client_->SignalCallCreate.connect(this, &CallClient::OnCallCreate);
  media_client_->SignalCallDestroy.connect(this, &CallClient::OnCallDestroy);
  media_client_->SignalDevicesChange.connect(this,
                                             &CallClient::OnDevicesChange);
  media_client_->set_secure(sdes_policy_);
  media_client_->set_multisession_enabled(multisession_enabled_);
}

void CallClient::OnRequestSignaling() {
  session_manager_->OnSignalingReady();
}

void CallClient::OnSessionCreate(cricket::Session* session, bool initiate) {
  session->set_current_protocol(signaling_protocol_);
}

void CallClient::OnCallCreate(cricket::Call* call) {
  call->SignalSessionState.connect(this, &CallClient::OnSessionState);
  call->SignalMediaStreamsUpdate.connect(
      this, &CallClient::OnMediaStreamsUpdate);
}

void CallClient::OnSessionState(cricket::Call* call,
                                cricket::Session* session,
                                cricket::Session::State state) {
  if (state == cricket::Session::STATE_RECEIVEDINITIATE) {
    buzz::Jid jid(session->remote_name());
    if (call_ == call && multisession_enabled_) {
      // We've received an initiate for an existing call. This is actually a
      // new session for that call.
      console_->PrintLine("Incoming session from '%s'", jid.Str().c_str());
      AddSession(session);

      cricket::CallOptions options;
      options.has_video = call_->has_video();
      options.data_channel_type = data_channel_type_;
      call_->AcceptSession(session, options);

      if (call_->has_video() && render_) {
        RenderAllStreams(call, session, true);
      }
    } else {
      console_->PrintLine("Incoming call from '%s'", jid.Str().c_str());
      call_ = call;
      AddSession(session);
      incoming_call_ = true;
      if (call->has_video() && render_) {
        local_renderer_ =
            cricket::VideoRendererFactory::CreateGuiVideoRenderer(160, 100);
      }
      if (auto_accept_) {
        cricket::CallOptions options;
        options.has_video = true;
        options.data_channel_type = data_channel_type_;
        Accept(options);
      }
    }
  } else if (state == cricket::Session::STATE_SENTINITIATE) {
    if (call->has_video() && render_) {
      local_renderer_ =
          cricket::VideoRendererFactory::CreateGuiVideoRenderer(160, 100);
    }
    console_->PrintLine("calling...");
  } else if (state == cricket::Session::STATE_RECEIVEDACCEPT) {
    console_->PrintLine("call answered");
    SetupAcceptedCall();
  } else if (state == cricket::Session::STATE_RECEIVEDREJECT) {
    console_->PrintLine("call not answered");
  } else if (state == cricket::Session::STATE_INPROGRESS) {
    console_->PrintLine("call in progress");
    call->SignalSpeakerMonitor.connect(this, &CallClient::OnSpeakerChanged);
    call->StartSpeakerMonitor(session);
  } else if (state == cricket::Session::STATE_RECEIVEDTERMINATE) {
    console_->PrintLine("other side terminated");
    TerminateAndRemoveSession(call, session->id());
  }
}

void CallClient::OnSpeakerChanged(cricket::Call* call,
                                  cricket::Session* session,
                                  const cricket::StreamParams& speaker) {
  if (!speaker.has_ssrcs()) {
    console_->PrintLine("Session %s has no current speaker.",
                        session->id().c_str());
  } else if (speaker.id.empty()) {
    console_->PrintLine("Session %s speaker change to unknown (%u).",
                        session->id().c_str(), speaker.first_ssrc());
  } else {
    console_->PrintLine("Session %s speaker changed to %s (%u).",
                        session->id().c_str(), speaker.id.c_str(),
                        speaker.first_ssrc());
  }
}

void SetMediaCaps(int media_caps, buzz::PresenceStatus* status) {
  status->set_voice_capability((media_caps & cricket::AUDIO_RECV) != 0);
  status->set_video_capability((media_caps & cricket::VIDEO_RECV) != 0);
  status->set_camera_capability((media_caps & cricket::VIDEO_SEND) != 0);
}

void SetCaps(int media_caps, buzz::PresenceStatus* status) {
  status->set_know_capabilities(true);
  status->set_pmuc_capability(true);
  SetMediaCaps(media_caps, status);
}

void SetAvailable(const buzz::Jid& jid, buzz::PresenceStatus* status) {
  status->set_jid(jid);
  status->set_available(true);
  status->set_show(buzz::PresenceStatus::SHOW_ONLINE);
}

void CallClient::InitPresence() {
  presence_push_ = new buzz::PresencePushTask(xmpp_client_, this);
  presence_push_->SignalStatusUpdate.connect(
    this, &CallClient::OnStatusUpdate);
  presence_push_->SignalMucJoined.connect(this, &CallClient::OnMucJoined);
  presence_push_->SignalMucLeft.connect(this, &CallClient::OnMucLeft);
  presence_push_->SignalMucStatusUpdate.connect(
    this, &CallClient::OnMucStatusUpdate);
  presence_push_->Start();

  presence_out_ = new buzz::PresenceOutTask(xmpp_client_);
  SetAvailable(xmpp_client_->jid(), &my_status_);
  SetCaps(media_client_->GetCapabilities(), &my_status_);
  SendStatus(my_status_);
  presence_out_->Start();

  muc_invite_recv_ = new buzz::MucInviteRecvTask(xmpp_client_);
  muc_invite_recv_->SignalInviteReceived.connect(this,
      &CallClient::OnMucInviteReceived);
  muc_invite_recv_->Start();

  muc_invite_send_ = new buzz::MucInviteSendTask(xmpp_client_);
  muc_invite_send_->Start();

  friend_invite_send_ = new buzz::FriendInviteSendTask(xmpp_client_);
  friend_invite_send_->Start();

  StartXmppPing();
}

void CallClient::StartXmppPing() {
  buzz::PingTask* ping = new buzz::PingTask(
      xmpp_client_, rtc::Thread::Current(),
      kPingPeriodMillis, kPingTimeoutMillis);
  ping->SignalTimeout.connect(this, &CallClient::OnPingTimeout);
  ping->Start();
}

void CallClient::OnPingTimeout() {
  LOG(LS_WARNING) << "XMPP Ping timeout. Will keep trying...";
  StartXmppPing();

  // Or should we do this instead?
  // Quit();
}

void CallClient::SendStatus(const buzz::PresenceStatus& status) {
  presence_out_->Send(status);
}

void CallClient::OnStatusUpdate(const buzz::PresenceStatus& status) {
  RosterItem item;
  item.jid = status.jid();
  item.show = status.show();
  item.status = status.status();

  std::string key = item.jid.Str();

  if (status.available() && status.voice_capability()) {
    if (show_roster_messages_) {
      console_->PrintLine("Adding to roster: %s", key.c_str());
    }
    (*roster_)[key] = item;
    // TODO: Make some of these constants.
  } else {
    if (show_roster_messages_) {
      console_->PrintLine("Removing from roster: %s", key.c_str());
    }
    RosterMap::iterator iter = roster_->find(key);
    if (iter != roster_->end())
      roster_->erase(iter);
  }
}

void CallClient::PrintRoster() {
  console_->PrintLine("Roster contains %d callable", roster_->size());
  RosterMap::iterator iter = roster_->begin();
  while (iter != roster_->end()) {
    console_->PrintLine("%s - %s",
                        iter->second.jid.BareJid().Str().c_str(),
                        DescribeStatus(iter->second.show, iter->second.status));
    iter++;
  }
}

void CallClient::SendChat(const std::string& to, const std::string msg) {
  buzz::XmlElement* stanza = new buzz::XmlElement(buzz::QN_MESSAGE);
  stanza->AddAttr(buzz::QN_TO, to);
  stanza->AddAttr(buzz::QN_ID, rtc::CreateRandomString(16));
  stanza->AddAttr(buzz::QN_TYPE, "chat");
  buzz::XmlElement* body = new buzz::XmlElement(buzz::QN_BODY);
  body->SetBodyText(msg);
  stanza->AddElement(body);

  xmpp_client_->SendStanza(stanza);
  delete stanza;
}

void CallClient::SendData(const std::string& streamid,
                          const std::string& text) {
  // TODO(mylesj): Support sending data over sessions other than the first.
  cricket::Session* session = GetFirstSession();
  if (!call_ || !session) {
    console_->PrintLine("Must be in a call to send data.");
    return;
  }
  if (!call_->has_data()) {
    console_->PrintLine("This call doesn't have a data channel.");
    return;
  }

  const cricket::DataContentDescription* data =
      cricket::GetFirstDataContentDescription(session->local_description());
  if (!data) {
    console_->PrintLine("This call doesn't have a data content.");
    return;
  }

  cricket::StreamParams stream;
  if (!cricket::GetStreamByIds(
          data->streams(), "", streamid, &stream)) {
    LOG(LS_WARNING) << "Could not send data: no such stream: "
                    << streamid << ".";
    return;
  }

  cricket::SendDataParams params;
  params.ssrc = stream.first_ssrc();
  rtc::Buffer payload(text.data(), text.length());
  cricket::SendDataResult result;
  bool sent = call_->SendData(session, params, payload, &result);
  if (!sent) {
    if (result == cricket::SDR_BLOCK) {
      LOG(LS_WARNING) << "Could not send data because it would block.";
    } else {
      LOG(LS_WARNING) << "Could not send data for unknown reason.";
    }
  }
}

void CallClient::InviteFriend(const std::string& name) {
  buzz::Jid jid(name);
  if (!jid.IsValid() || jid.node() == "") {
    console_->PrintLine("Invalid JID. JIDs should be in the form user@domain.");
    return;
  }
  // Note: for some reason the Buzz backend does not forward our presence
  // subscription requests to the end user when that user is another call
  // client as opposed to a Smurf user. Thus, in that scenario, you must
  // run the friend command as the other user too to create the linkage
  // (and you won't be notified to do so).
  friend_invite_send_->Send(jid);
  console_->PrintLine("Requesting to befriend %s.", name.c_str());
}

bool CallClient::FindJid(const std::string& name, buzz::Jid* found_jid,
                         cricket::CallOptions* options) {
  bool found = false;
  options->is_muc = false;
  buzz::Jid callto_jid(name);
  if (name.length() == 0 && mucs_.size() > 0) {
    // if no name, and in a MUC, establish audio with the MUC
    *found_jid = mucs_.begin()->first;
    found = true;
    options->is_muc = true;
  } else if (name[0] == '+') {
    // if the first character is a +, assume it's a phone number
    *found_jid = callto_jid;
    found = true;
  } else {
    // otherwise, it's a friend
    for (RosterMap::iterator iter = roster_->begin();
         iter != roster_->end(); ++iter) {
      if (iter->second.jid.BareEquals(callto_jid)) {
        found = true;
        *found_jid = iter->second.jid;
        break;
      }
    }

    if (!found) {
      if (mucs_.count(callto_jid) == 1 &&
          mucs_[callto_jid]->state() == buzz::Muc::MUC_JOINED) {
        found = true;
        *found_jid = callto_jid;
        options->is_muc = true;
      }
    }
  }

  if (found) {
    console_->PrintLine("Found %s '%s'",
                        options->is_muc ? "room" : "online friend",
                        found_jid->Str().c_str());
  } else {
    console_->PrintLine("Could not find online friend '%s'", name.c_str());
  }

  return found;
}

void CallClient::OnDataReceived(cricket::Call*,
                                const cricket::ReceiveDataParams& params,
                                const rtc::Buffer& payload) {
  // TODO(mylesj): Support receiving data on sessions other than the first.
  cricket::Session* session = GetFirstSession();
  if (!session)
    return;

  cricket::StreamParams stream;
  const std::vector<cricket::StreamParams>* data_streams =
      call_->GetDataRecvStreams(session);
  std::string text(payload.data(), payload.length());
  if (data_streams && GetStreamBySsrc(*data_streams, params.ssrc, &stream)) {
    console_->PrintLine(
        "Received data from '%s' on stream '%s' (ssrc=%u): %s",
        stream.groupid.c_str(), stream.id.c_str(),
        params.ssrc, text.c_str());
  } else {
    console_->PrintLine(
        "Received data (ssrc=%u): %s",
        params.ssrc, text.c_str());
  }
}

bool CallClient::PlaceCall(const std::string& name,
                           cricket::CallOptions options) {
  buzz::Jid jid;
  if (!FindJid(name, &jid, &options))
    return false;

  if (!call_) {
    call_ = media_client_->CreateCall();
    AddSession(call_->InitiateSession(jid, media_client_->jid(), options));
  }
  media_client_->SetFocus(call_);
  if (call_->has_video() && render_ && !options.is_muc) {
    // TODO(pthatcher): Hookup local_render_ to the local capturer.
  }
  if (options.is_muc) {
    const std::string& nick = mucs_[jid]->local_jid().resource();
    hangout_pubsub_client_ =
        new buzz::HangoutPubSubClient(xmpp_client_, jid, nick);
    hangout_pubsub_client_->SignalPresenterStateChange.connect(
        this, &CallClient::OnPresenterStateChange);
    hangout_pubsub_client_->SignalAudioMuteStateChange.connect(
        this, &CallClient::OnAudioMuteStateChange);
    hangout_pubsub_client_->SignalRecordingStateChange.connect(
        this, &CallClient::OnRecordingStateChange);
    hangout_pubsub_client_->SignalRemoteMute.connect(
        this, &CallClient::OnRemoteMuted);
    hangout_pubsub_client_->SignalMediaBlock.connect(
        this, &CallClient::OnMediaBlocked);
    hangout_pubsub_client_->SignalRequestError.connect(
        this, &CallClient::OnHangoutRequestError);
    hangout_pubsub_client_->SignalPublishAudioMuteError.connect(
        this, &CallClient::OnHangoutPublishAudioMuteError);
    hangout_pubsub_client_->SignalPublishPresenterError.connect(
        this, &CallClient::OnHangoutPublishPresenterError);
    hangout_pubsub_client_->SignalPublishRecordingError.connect(
        this, &CallClient::OnHangoutPublishRecordingError);
    hangout_pubsub_client_->SignalRemoteMuteError.connect(
        this, &CallClient::OnHangoutRemoteMuteError);
    hangout_pubsub_client_->RequestAll();
  }

  return true;
}

bool CallClient::InitiateAdditionalSession(const std::string& name,
                                           cricket::CallOptions options) {
  // Can't add a session if there is no call yet.
  if (!call_)
    return false;

  buzz::Jid jid;
  if (!FindJid(name, &jid, &options))
    return false;

  std::vector<cricket::Session*>& call_sessions = sessions_[call_->id()];
  call_sessions.push_back(
      call_->InitiateSession(jid,
                             buzz::Jid(call_sessions[0]->remote_name()),
                             options));

  return true;
}

void CallClient::TerminateAndRemoveSession(cricket::Call* call,
                                           const std::string& id) {
  std::vector<cricket::Session*>& call_sessions = sessions_[call->id()];
  for (std::vector<cricket::Session*>::iterator iter = call_sessions.begin();
       iter != call_sessions.end(); ++iter) {
    if ((*iter)->id() == id) {
      RenderAllStreams(call, *iter, false);
      call_->TerminateSession(*iter);
      call_sessions.erase(iter);
      break;
    }
  }
}

void CallClient::PrintCalls() {
  const std::map<uint32, cricket::Call*>& calls = media_client_->calls();
  for (std::map<uint32, cricket::Call*>::const_iterator i = calls.begin();
       i != calls.end(); ++i) {
    console_->PrintLine("Call (id:%d), is %s",
                        i->first,
                        i->second == call_ ? "active" : "on hold");
    std::vector<cricket::Session *>& sessions = sessions_[call_->id()];
    for (std::vector<cricket::Session *>::const_iterator j = sessions.begin();
         j != sessions.end(); ++j) {
      console_->PrintLine("|--Session (id:%s), to %s", (*j)->id().c_str(),
                          (*j)->remote_name().c_str());

      std::vector<cricket::StreamParams>::const_iterator k;
      const std::vector<cricket::StreamParams>* streams =
          i->second->GetAudioRecvStreams(*j);
      if (streams)
        for (k = streams->begin(); k != streams->end(); ++k) {
          console_->PrintLine("|----Audio Stream: %s", k->ToString().c_str());
        }
      streams = i->second->GetVideoRecvStreams(*j);
      if (streams)
        for (k = streams->begin(); k != streams->end(); ++k) {
          console_->PrintLine("|----Video Stream: %s", k->ToString().c_str());
        }
      streams = i->second->GetDataRecvStreams(*j);
      if (streams)
        for (k = streams->begin(); k != streams->end(); ++k) {
          console_->PrintLine("|----Data Stream: %s", k->ToString().c_str());
        }
    }
  }
}

void CallClient::SwitchToCall(uint32 call_id) {
  const std::map<uint32, cricket::Call*>& calls = media_client_->calls();
  std::map<uint32, cricket::Call*>::const_iterator call_iter =
      calls.find(call_id);
  if (call_iter != calls.end()) {
    media_client_->SetFocus(call_iter->second);
    call_ = call_iter->second;
  } else {
    console_->PrintLine("Unable to find call: %d", call_id);
  }
}

void CallClient::OnPresenterStateChange(
    const std::string& nick, bool was_presenting, bool is_presenting) {
  if (!was_presenting && is_presenting) {
    console_->PrintLine("%s now presenting.", nick.c_str());
  } else if (was_presenting && !is_presenting) {
    console_->PrintLine("%s no longer presenting.", nick.c_str());
  } else if (was_presenting && is_presenting) {
    console_->PrintLine("%s still presenting.", nick.c_str());
  } else if (!was_presenting && !is_presenting) {
    console_->PrintLine("%s still not presenting.", nick.c_str());
  }
}

void CallClient::OnAudioMuteStateChange(
    const std::string& nick, bool was_muted, bool is_muted) {
  if (!was_muted && is_muted) {
    console_->PrintLine("%s now muted.", nick.c_str());
  } else if (was_muted && !is_muted) {
    console_->PrintLine("%s no longer muted.", nick.c_str());
  }
}

void CallClient::OnRecordingStateChange(
    const std::string& nick, bool was_recording, bool is_recording) {
  if (!was_recording && is_recording) {
    console_->PrintLine("%s now recording.", nick.c_str());
  } else if (was_recording && !is_recording) {
    console_->PrintLine("%s no longer recording.", nick.c_str());
  }
}

void CallClient::OnRemoteMuted(const std::string& mutee_nick,
                               const std::string& muter_nick,
                               bool should_mute_locally) {
  if (should_mute_locally) {
    call_->Mute(true);
    console_->PrintLine("Remote muted by %s.", muter_nick.c_str());
  } else {
    console_->PrintLine("%s remote muted by %s.",
                        mutee_nick.c_str(), muter_nick.c_str());
  }
}

void CallClient::OnMediaBlocked(const std::string& blockee_nick,
                                const std::string& blocker_nick) {
  console_->PrintLine("%s blocked by %s.",
                      blockee_nick.c_str(), blocker_nick.c_str());
}

void CallClient::OnHangoutRequestError(const std::string& node,
                                       const buzz::XmlElement* stanza) {
  console_->PrintLine("Failed request pub sub items for node %s.",
                      node.c_str());
}

void CallClient::OnHangoutPublishAudioMuteError(
    const std::string& task_id, const buzz::XmlElement* stanza) {
  console_->PrintLine("Failed to publish audio mute state.");
}

void CallClient::OnHangoutPublishPresenterError(
    const std::string& task_id, const buzz::XmlElement* stanza) {
  console_->PrintLine("Failed to publish presenting state.");
}

void CallClient::OnHangoutPublishRecordingError(
    const std::string& task_id, const buzz::XmlElement* stanza) {
  console_->PrintLine("Failed to publish recording state.");
}

void CallClient::OnHangoutRemoteMuteError(const std::string& task_id,
                                          const std::string& mutee_nick,
                                          const buzz::XmlElement* stanza) {
  console_->PrintLine("Failed to remote mute.");
}

void CallClient::Accept(const cricket::CallOptions& options) {
  ASSERT(call_ && incoming_call_);
  ASSERT(sessions_[call_->id()].size() == 1);
  cricket::Session* session = GetFirstSession();
  call_->AcceptSession(session, options);
  media_client_->SetFocus(call_);
  if (call_->has_video() && render_) {
    // TODO(pthatcher): Hookup local_render_ to the local capturer.
    RenderAllStreams(call_, session, true);
  }
  SetupAcceptedCall();
  incoming_call_ = false;
}

void CallClient::SetupAcceptedCall() {
  if (call_->has_data()) {
    call_->SignalDataReceived.connect(this, &CallClient::OnDataReceived);
  }
}

void CallClient::Reject() {
  ASSERT(call_ && incoming_call_);
  call_->RejectSession(call_->sessions()[0]);
  incoming_call_ = false;
}

void CallClient::Quit() {
  rtc::Thread::Current()->Quit();
}

void CallClient::SetNick(const std::string& muc_nick) {
  my_status_.set_nick(muc_nick);

  // TODO: We might want to re-send presence, but right
  // now, it appears to be ignored by the MUC.
  //
  // presence_out_->Send(my_status_); for (MucMap::const_iterator itr
  // = mucs_.begin(); itr != mucs_.end(); ++itr) {
  // presence_out_->SendDirected(itr->second->local_jid(),
  // my_status_); }

  console_->PrintLine("Nick set to '%s'.", muc_nick.c_str());
}

void CallClient::LookupAndJoinMuc(const std::string& room_name) {
  // The room_name can't be empty for lookup task.
  if (room_name.empty()) {
    console_->PrintLine("Please provide a room name or room jid.");
    return;
  }

  std::string room = room_name;
  std::string domain = xmpp_client_->jid().domain();
  if (room_name.find("@") != std::string::npos) {
    // Assume the room_name is a fully qualified room name.
    // We'll find the room name string and domain name string from it.
    room = room_name.substr(0, room_name.find("@"));
    domain = room_name.substr(room_name.find("@") + 1);
  }

  buzz::MucRoomLookupTask* lookup_query_task =
      buzz::MucRoomLookupTask::CreateLookupTaskForRoomName(
          xmpp_client_, buzz::Jid(buzz::STR_GOOGLE_MUC_LOOKUP_JID), room,
          domain);
  lookup_query_task->SignalResult.connect(this,
      &CallClient::OnRoomLookupResponse);
  lookup_query_task->SignalError.connect(this,
      &CallClient::OnRoomLookupError);
  lookup_query_task->Start();
}

void CallClient::JoinMuc(const std::string& room_jid_str) {
  if (room_jid_str.empty()) {
    buzz::Jid room_jid = GenerateRandomMucJid();
    console_->PrintLine("Generated a random room jid: %s",
                        room_jid.Str().c_str());
    JoinMuc(room_jid);
  } else {
    JoinMuc(buzz::Jid(room_jid_str));
  }
}

void CallClient::JoinMuc(const buzz::Jid& room_jid) {
  if (!room_jid.IsValid()) {
    console_->PrintLine("Unable to make valid muc endpoint for %s",
                        room_jid.Str().c_str());
    return;
  }

  std::string room_nick = room_jid.resource();
  if (room_nick.empty()) {
    room_nick = (xmpp_client_->jid().node()
                 + "_" + xmpp_client_->jid().resource());
  }

  MucMap::iterator elem = mucs_.find(room_jid);
  if (elem != mucs_.end()) {
    console_->PrintLine("This MUC already exists.");
    return;
  }

  buzz::Muc* muc = new buzz::Muc(room_jid.BareJid(), room_nick);
  mucs_[muc->jid()] = muc;
  presence_out_->SendDirected(muc->local_jid(), my_status_);
}

void CallClient::OnRoomLookupResponse(buzz::MucRoomLookupTask* task,
                                      const buzz::MucRoomInfo& room) {
  // The server requires the room be "configured" before being used.
  // We only need to configure it if we create it, but rooms are
  // auto-created at lookup, so there's currently no way to know if we
  // created it.  So, we configure it every time, just in case.
  // Luckily, it appears to be safe to configure a room that's already
  // configured.  Our current flow is:
  // 1. Lookup/auto-create
  // 2. Configure
  // 3. Join
  // TODO: In the future, once the server supports it, we
  // should:
  // 1. Lookup
  // 2. Create and Configure if necessary
  // 3. Join
  std::vector<std::string> room_features;
  room_features.push_back(buzz::STR_MUC_ROOM_FEATURE_ENTERPRISE);
  buzz::MucRoomConfigTask* room_config_task = new buzz::MucRoomConfigTask(
      xmpp_client_, room.jid, room.full_name(), room_features);
  room_config_task->SignalResult.connect(this,
      &CallClient::OnRoomConfigResult);
  room_config_task->SignalError.connect(this,
      &CallClient::OnRoomConfigError);
  room_config_task->Start();
}

void CallClient::OnRoomLookupError(buzz::IqTask* task,
                                   const buzz::XmlElement* stanza) {
  if (stanza == NULL) {
    console_->PrintLine("Room lookup failed.");
  } else {
    console_->PrintLine("Room lookup error: ", stanza->Str().c_str());
  }
}

void CallClient::OnRoomConfigResult(buzz::MucRoomConfigTask* task) {
  JoinMuc(task->room_jid());
}

void CallClient::OnRoomConfigError(buzz::IqTask* task,
                                   const buzz::XmlElement* stanza) {
  console_->PrintLine("Room config failed.");
  // We join the muc anyway, because if the room is already
  // configured, the configure will fail, but we still want to join.
  // Idealy, we'd know why the room config failed and only do this on
  // "already configured" errors.  But right now all we get back is
  // "not-allowed".
  buzz::MucRoomConfigTask* config_task =
      static_cast<buzz::MucRoomConfigTask*>(task);
  JoinMuc(config_task->room_jid());
}

void CallClient::OnMucInviteReceived(const buzz::Jid& inviter,
    const buzz::Jid& room,
    const std::vector<buzz::AvailableMediaEntry>& avail) {

  console_->PrintLine("Invited to join %s by %s.", room.Str().c_str(),
      inviter.Str().c_str());
  console_->PrintLine("Available media:");
  if (avail.size() > 0) {
    for (std::vector<buzz::AvailableMediaEntry>::const_iterator i =
            avail.begin();
        i != avail.end();
        ++i) {
      console_->PrintLine("  %s, %s",
                          buzz::AvailableMediaEntry::TypeAsString(i->type),
                          buzz::AvailableMediaEntry::StatusAsString(i->status));
    }
  } else {
    console_->PrintLine("  None");
  }
  // We automatically join the room.
  JoinMuc(room);
}

void CallClient::OnMucJoined(const buzz::Jid& endpoint) {
  MucMap::iterator elem = mucs_.find(endpoint);
  ASSERT(elem != mucs_.end() &&
         elem->second->state() == buzz::Muc::MUC_JOINING);

  buzz::Muc* muc = elem->second;
  muc->set_state(buzz::Muc::MUC_JOINED);
  console_->PrintLine("Joined \"%s\"", muc->jid().Str().c_str());
}

void CallClient::OnMucStatusUpdate(const buzz::Jid& jid,
    const buzz::MucPresenceStatus& status) {

  // Look up this muc.
  MucMap::iterator elem = mucs_.find(jid);
  ASSERT(elem != mucs_.end());

  buzz::Muc* muc = elem->second;

  if (status.jid().IsBare() || status.jid() == muc->local_jid()) {
    // We are only interested in status about other users.
    return;
  }

  if (status.available()) {
    muc->members()[status.jid().resource()] = status;
  } else {
    muc->members().erase(status.jid().resource());
  }
}

bool CallClient::InMuc() {
  const buzz::Jid* muc_jid = FirstMucJid();
  if (!muc_jid) return false;
  return muc_jid->IsValid();
}

const buzz::Jid* CallClient::FirstMucJid() {
  if (mucs_.empty()) return NULL;
  return &(mucs_.begin()->first);
}

void CallClient::LeaveMuc(const std::string& room) {
  buzz::Jid room_jid;
  const buzz::Jid* muc_jid = FirstMucJid();
  if (room.length() > 0) {
    room_jid = buzz::Jid(room);
  } else if (mucs_.size() > 0) {
    // leave the first MUC if no JID specified
    if (muc_jid) {
      room_jid = *(muc_jid);
    }
  }

  if (!room_jid.IsValid()) {
    console_->PrintLine("Invalid MUC JID.");
    return;
  }

  MucMap::iterator elem = mucs_.find(room_jid);
  if (elem == mucs_.end()) {
    console_->PrintLine("No such MUC.");
    return;
  }

  buzz::Muc* muc = elem->second;
  muc->set_state(buzz::Muc::MUC_LEAVING);

  buzz::PresenceStatus status;
  status.set_jid(my_status_.jid());
  status.set_available(false);
  status.set_priority(0);
  presence_out_->SendDirected(muc->local_jid(), status);
}

void CallClient::OnMucLeft(const buzz::Jid& endpoint, int error) {
  // We could be kicked from a room from any state.  We would hope this
  // happens While in the MUC_LEAVING state
  MucMap::iterator elem = mucs_.find(endpoint);
  if (elem == mucs_.end())
    return;

  buzz::Muc* muc = elem->second;
  if (muc->state() == buzz::Muc::MUC_JOINING) {
    console_->PrintLine("Failed to join \"%s\", code=%d",
                        muc->jid().Str().c_str(), error);
  } else if (muc->state() == buzz::Muc::MUC_JOINED) {
    console_->PrintLine("Kicked from \"%s\"",
                        muc->jid().Str().c_str());
  }

  delete muc;
  mucs_.erase(elem);
}

void CallClient::InviteToMuc(const std::string& given_user,
                             const std::string& room) {
  std::string user = given_user;

  // First find the room.
  const buzz::Muc* found_muc;
  if (room.length() == 0) {
    if (mucs_.size() == 0) {
      console_->PrintLine("Not in a room yet; can't invite.");
      return;
    }
    // Invite to the first muc
    found_muc = mucs_.begin()->second;
  } else {
    MucMap::iterator elem = mucs_.find(buzz::Jid(room));
    if (elem == mucs_.end()) {
      console_->PrintLine("Not in room %s.", room.c_str());
      return;
    }
    found_muc = elem->second;
  }

  buzz::Jid invite_to = found_muc->jid();

  // Now find the user. We invite all of their resources.
  bool found_user = false;
  buzz::Jid user_jid(user);
  for (RosterMap::iterator iter = roster_->begin();
       iter != roster_->end(); ++iter) {
    if (iter->second.jid.BareEquals(user_jid)) {
      buzz::Jid invitee = iter->second.jid;
      muc_invite_send_->Send(invite_to, invitee);
      found_user = true;
    }
  }
  if (!found_user) {
    buzz::Jid invitee = user_jid;
    muc_invite_send_->Send(invite_to, invitee);
  }
}

void CallClient::GetDevices() {
  std::vector<std::string> names;
  media_client_->GetAudioInputDevices(&names);
  console_->PrintLine("Audio input devices:");
  PrintDevices(names);
  media_client_->GetAudioOutputDevices(&names);
  console_->PrintLine("Audio output devices:");
  PrintDevices(names);
  media_client_->GetVideoCaptureDevices(&names);
  console_->PrintLine("Video capture devices:");
  PrintDevices(names);
}

void CallClient::PrintDevices(const std::vector<std::string>& names) {
  for (size_t i = 0; i < names.size(); ++i) {
    console_->PrintLine("%d: %s", static_cast<int>(i), names[i].c_str());
  }
}

void CallClient::OnDevicesChange() {
  console_->PrintLine("Devices changed.");
  SetMediaCaps(media_client_->GetCapabilities(), &my_status_);
  SendStatus(my_status_);
}

void CallClient::SetVolume(const std::string& level) {
  media_client_->SetOutputVolume(strtol(level.c_str(), NULL, 10));
}

void CallClient::OnMediaStreamsUpdate(cricket::Call* call,
                                      cricket::Session* session,
                                      const cricket::MediaStreams& added,
                                      const cricket::MediaStreams& removed) {
  if (call && call->has_video()) {
    for (std::vector<cricket::StreamParams>::const_iterator
         it = removed.video().begin(); it != removed.video().end(); ++it) {
      RemoveStaticRenderedView(it->first_ssrc());
    }

    if (render_) {
      RenderStreams(call, session, added.video(), true);
    }
    SendViewRequest(call, session);
  }
}

void CallClient::RenderAllStreams(cricket::Call* call,
                                  cricket::Session* session,
                                  bool enable) {
  const std::vector<cricket::StreamParams>* video_streams =
      call->GetVideoRecvStreams(session);
  if (video_streams) {
    RenderStreams(call, session, *video_streams, enable);
  }
}

void CallClient::RenderStreams(
    cricket::Call* call,
    cricket::Session* session,
    const std::vector<cricket::StreamParams>& video_streams,
    bool enable) {
  std::vector<cricket::StreamParams>::const_iterator stream;
  for (stream = video_streams.begin(); stream != video_streams.end();
       ++stream) {
    RenderStream(call, session, *stream, enable);
  }
}

void CallClient::RenderStream(cricket::Call* call,
                              cricket::Session* session,
                              const cricket::StreamParams& stream,
                              bool enable) {
  if (!stream.has_ssrcs()) {
    // Nothing to see here; move along.
    return;
  }

  uint32 ssrc = stream.first_ssrc();
  StaticRenderedViews::iterator iter =
      static_rendered_views_.find(std::make_pair(session, ssrc));
  if (enable) {
    if (iter == static_rendered_views_.end()) {
      // TODO(pthatcher): Make dimensions and positions more configurable.
      int offset = (50 * static_views_accumulated_count_) % 300;
      AddStaticRenderedView(session, ssrc, 640, 400, 30,
                            offset, offset);
      // Should have it now.
      iter = static_rendered_views_.find(std::make_pair(session, ssrc));
    }
    call->SetVideoRenderer(session, ssrc, iter->second.renderer);
  } else {
    if (iter != static_rendered_views_.end()) {
      call->SetVideoRenderer(session, ssrc, NULL);
      RemoveStaticRenderedView(ssrc);
    }
  }
}

// TODO: Would these methods to add and remove views make
// more sense in call.cc?  Would other clients use them?
void CallClient::AddStaticRenderedView(
    cricket::Session* session,
    uint32 ssrc, int width, int height, int framerate,
    int x_offset, int y_offset) {
  StaticRenderedView rendered_view(
      cricket::StaticVideoView(
          cricket::StreamSelector(ssrc), width, height, framerate),
      cricket::VideoRendererFactory::CreateGuiVideoRenderer(
          x_offset, y_offset));
  rendered_view.renderer->SetSize(width, height, 0);
  static_rendered_views_.insert(std::make_pair(std::make_pair(session, ssrc),
                                               rendered_view));
  ++static_views_accumulated_count_;
  console_->PrintLine("Added renderer for ssrc %d", ssrc);
}

bool CallClient::RemoveStaticRenderedView(uint32 ssrc) {
  for (StaticRenderedViews::iterator it = static_rendered_views_.begin();
       it != static_rendered_views_.end(); ++it) {
    if (it->second.view.selector.ssrc == ssrc) {
      delete it->second.renderer;
      static_rendered_views_.erase(it);
      console_->PrintLine("Removed renderer for ssrc %d", ssrc);
      return true;
    }
  }
  return false;
}

void CallClient::RemoveCallsStaticRenderedViews(cricket::Call* call) {
  std::vector<cricket::Session*>& sessions = sessions_[call->id()];
  std::set<cricket::Session*> call_sessions(sessions.begin(), sessions.end());
  for (StaticRenderedViews::iterator it = static_rendered_views_.begin();
       it != static_rendered_views_.end(); ) {
    if (call_sessions.find(it->first.first) != call_sessions.end()) {
      delete it->second.renderer;
      static_rendered_views_.erase(it++);
    } else {
      ++it;
    }
  }
}

void CallClient::SendViewRequest(cricket::Call* call,
                                 cricket::Session* session) {
  cricket::ViewRequest request;
  for (StaticRenderedViews::iterator it = static_rendered_views_.begin();
       it != static_rendered_views_.end(); ++it) {
    if (it->first.first == session) {
      request.static_video_views.push_back(it->second.view);
    }
  }
  call->SendViewRequest(session, request);
}

buzz::Jid CallClient::GenerateRandomMucJid() {
  // Generate a GUID of the form XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX,
  // for an eventual JID of private-chat-<GUID>@groupchat.google.com.
  char guid[37], guid_room[256];
  for (size_t i = 0; i < ARRAY_SIZE(guid) - 1;) {
    if (i == 8 || i == 13 || i == 18 || i == 23) {
      guid[i++] = '-';
    } else {
      sprintf(guid + i, "%04x", rand());
      i += 4;
    }
  }

  rtc::sprintfn(guid_room,
                      ARRAY_SIZE(guid_room),
                      "private-chat-%s@%s",
                      guid,
                      pmuc_domain_.c_str());
  return buzz::Jid(guid_room);
}

bool CallClient::SelectFirstDesktopScreencastId(
    cricket::ScreencastId* screencastid) {
  if (!rtc::WindowPickerFactory::IsSupported()) {
    LOG(LS_WARNING) << "Window picker not suported on this OS.";
    return false;
  }

  rtc::WindowPicker* picker =
      rtc::WindowPickerFactory::CreateWindowPicker();
  if (!picker) {
    LOG(LS_WARNING) << "Could not create a window picker.";
    return false;
  }

  rtc::DesktopDescriptionList desktops;
  if (!picker->GetDesktopList(&desktops) || desktops.empty()) {
    LOG(LS_WARNING) << "Could not get a list of desktops.";
    return false;
  }

  *screencastid = cricket::ScreencastId(desktops[0].id());
  return true;
}

void CallClient::PrintStats() const {
  const cricket::VoiceMediaInfo& vmi = call_->last_voice_media_info();

  for (std::vector<cricket::VoiceSenderInfo>::const_iterator it =
       vmi.senders.begin(); it != vmi.senders.end(); ++it) {
    console_->PrintLine("Sender: ssrc=%u codec='%s' bytes=%d packets=%d "
                        "rtt=%d jitter=%d",
                        it->ssrc(), it->codec_name.c_str(), it->bytes_sent,
                        it->packets_sent, it->rtt_ms, it->jitter_ms);
  }

  for (std::vector<cricket::VoiceReceiverInfo>::const_iterator it =
       vmi.receivers.begin(); it != vmi.receivers.end(); ++it) {
    console_->PrintLine("Receiver: ssrc=%u bytes=%d packets=%d "
                        "jitter=%d loss=%.2f",
                        it->ssrc(), it->bytes_rcvd, it->packets_rcvd,
                        it->jitter_ms, it->fraction_lost);
  }
}