henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2012, 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 "talk/examples/peerconnection/client/conductor.h" |
| 29 | |
| 30 | #include <utility> |
| 31 | |
| 32 | #include "talk/app/webrtc/videosourceinterface.h" |
| 33 | #include "talk/base/common.h" |
| 34 | #include "talk/base/json.h" |
| 35 | #include "talk/base/logging.h" |
| 36 | #include "talk/examples/peerconnection/client/defaults.h" |
| 37 | #include "talk/media/devices/devicemanager.h" |
| 38 | |
| 39 | // Names used for a IceCandidate JSON object. |
| 40 | const char kCandidateSdpMidName[] = "sdpMid"; |
| 41 | const char kCandidateSdpMlineIndexName[] = "sdpMLineIndex"; |
| 42 | const char kCandidateSdpName[] = "candidate"; |
| 43 | |
| 44 | // Names used for a SessionDescription JSON object. |
| 45 | const char kSessionDescriptionTypeName[] = "type"; |
| 46 | const char kSessionDescriptionSdpName[] = "sdp"; |
| 47 | |
| 48 | class DummySetSessionDescriptionObserver |
| 49 | : public webrtc::SetSessionDescriptionObserver { |
| 50 | public: |
| 51 | static DummySetSessionDescriptionObserver* Create() { |
| 52 | return |
| 53 | new talk_base::RefCountedObject<DummySetSessionDescriptionObserver>(); |
| 54 | } |
| 55 | virtual void OnSuccess() { |
| 56 | LOG(INFO) << __FUNCTION__; |
| 57 | } |
| 58 | virtual void OnFailure(const std::string& error) { |
| 59 | LOG(INFO) << __FUNCTION__ << " " << error; |
| 60 | } |
| 61 | |
| 62 | protected: |
| 63 | DummySetSessionDescriptionObserver() {} |
| 64 | ~DummySetSessionDescriptionObserver() {} |
| 65 | }; |
| 66 | |
| 67 | Conductor::Conductor(PeerConnectionClient* client, MainWindow* main_wnd) |
| 68 | : peer_id_(-1), |
| 69 | client_(client), |
| 70 | main_wnd_(main_wnd) { |
| 71 | client_->RegisterObserver(this); |
| 72 | main_wnd->RegisterObserver(this); |
| 73 | } |
| 74 | |
| 75 | Conductor::~Conductor() { |
| 76 | ASSERT(peer_connection_.get() == NULL); |
| 77 | } |
| 78 | |
| 79 | bool Conductor::connection_active() const { |
| 80 | return peer_connection_.get() != NULL; |
| 81 | } |
| 82 | |
| 83 | void Conductor::Close() { |
| 84 | client_->SignOut(); |
| 85 | DeletePeerConnection(); |
| 86 | } |
| 87 | |
| 88 | bool Conductor::InitializePeerConnection() { |
| 89 | ASSERT(peer_connection_factory_.get() == NULL); |
| 90 | ASSERT(peer_connection_.get() == NULL); |
| 91 | |
| 92 | peer_connection_factory_ = webrtc::CreatePeerConnectionFactory(); |
| 93 | |
| 94 | if (!peer_connection_factory_.get()) { |
| 95 | main_wnd_->MessageBox("Error", |
| 96 | "Failed to initialize PeerConnectionFactory", true); |
| 97 | DeletePeerConnection(); |
| 98 | return false; |
| 99 | } |
| 100 | |
| 101 | webrtc::PeerConnectionInterface::IceServers servers; |
| 102 | webrtc::PeerConnectionInterface::IceServer server; |
| 103 | server.uri = GetPeerConnectionString(); |
| 104 | servers.push_back(server); |
| 105 | peer_connection_ = peer_connection_factory_->CreatePeerConnection(servers, |
| 106 | NULL, |
| 107 | NULL, |
| 108 | this); |
| 109 | if (!peer_connection_.get()) { |
| 110 | main_wnd_->MessageBox("Error", |
| 111 | "CreatePeerConnection failed", true); |
| 112 | DeletePeerConnection(); |
| 113 | } |
| 114 | AddStreams(); |
| 115 | return peer_connection_.get() != NULL; |
| 116 | } |
| 117 | |
| 118 | void Conductor::DeletePeerConnection() { |
| 119 | peer_connection_ = NULL; |
| 120 | active_streams_.clear(); |
| 121 | main_wnd_->StopLocalRenderer(); |
| 122 | main_wnd_->StopRemoteRenderer(); |
| 123 | peer_connection_factory_ = NULL; |
| 124 | peer_id_ = -1; |
| 125 | } |
| 126 | |
| 127 | void Conductor::EnsureStreamingUI() { |
| 128 | ASSERT(peer_connection_.get() != NULL); |
| 129 | if (main_wnd_->IsWindow()) { |
| 130 | if (main_wnd_->current_ui() != MainWindow::STREAMING) |
| 131 | main_wnd_->SwitchToStreamingUI(); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | // |
| 136 | // PeerConnectionObserver implementation. |
| 137 | // |
| 138 | |
| 139 | void Conductor::OnError() { |
| 140 | LOG(LS_ERROR) << __FUNCTION__; |
| 141 | main_wnd_->QueueUIThreadCallback(PEER_CONNECTION_ERROR, NULL); |
| 142 | } |
| 143 | |
| 144 | // Called when a remote stream is added |
| 145 | void Conductor::OnAddStream(webrtc::MediaStreamInterface* stream) { |
| 146 | LOG(INFO) << __FUNCTION__ << " " << stream->label(); |
| 147 | |
| 148 | stream->AddRef(); |
| 149 | main_wnd_->QueueUIThreadCallback(NEW_STREAM_ADDED, |
| 150 | stream); |
| 151 | } |
| 152 | |
| 153 | void Conductor::OnRemoveStream(webrtc::MediaStreamInterface* stream) { |
| 154 | LOG(INFO) << __FUNCTION__ << " " << stream->label(); |
| 155 | stream->AddRef(); |
| 156 | main_wnd_->QueueUIThreadCallback(STREAM_REMOVED, |
| 157 | stream); |
| 158 | } |
| 159 | |
| 160 | void Conductor::OnIceCandidate(const webrtc::IceCandidateInterface* candidate) { |
| 161 | LOG(INFO) << __FUNCTION__ << " " << candidate->sdp_mline_index(); |
| 162 | Json::StyledWriter writer; |
| 163 | Json::Value jmessage; |
| 164 | |
| 165 | jmessage[kCandidateSdpMidName] = candidate->sdp_mid(); |
| 166 | jmessage[kCandidateSdpMlineIndexName] = candidate->sdp_mline_index(); |
| 167 | std::string sdp; |
| 168 | if (!candidate->ToString(&sdp)) { |
| 169 | LOG(LS_ERROR) << "Failed to serialize candidate"; |
| 170 | return; |
| 171 | } |
| 172 | jmessage[kCandidateSdpName] = sdp; |
| 173 | SendMessage(writer.write(jmessage)); |
| 174 | } |
| 175 | |
| 176 | // |
| 177 | // PeerConnectionClientObserver implementation. |
| 178 | // |
| 179 | |
| 180 | void Conductor::OnSignedIn() { |
| 181 | LOG(INFO) << __FUNCTION__; |
| 182 | main_wnd_->SwitchToPeerList(client_->peers()); |
| 183 | } |
| 184 | |
| 185 | void Conductor::OnDisconnected() { |
| 186 | LOG(INFO) << __FUNCTION__; |
| 187 | |
| 188 | DeletePeerConnection(); |
| 189 | |
| 190 | if (main_wnd_->IsWindow()) |
| 191 | main_wnd_->SwitchToConnectUI(); |
| 192 | } |
| 193 | |
| 194 | void Conductor::OnPeerConnected(int id, const std::string& name) { |
| 195 | LOG(INFO) << __FUNCTION__; |
| 196 | // Refresh the list if we're showing it. |
| 197 | if (main_wnd_->current_ui() == MainWindow::LIST_PEERS) |
| 198 | main_wnd_->SwitchToPeerList(client_->peers()); |
| 199 | } |
| 200 | |
| 201 | void Conductor::OnPeerDisconnected(int id) { |
| 202 | LOG(INFO) << __FUNCTION__; |
| 203 | if (id == peer_id_) { |
| 204 | LOG(INFO) << "Our peer disconnected"; |
| 205 | main_wnd_->QueueUIThreadCallback(PEER_CONNECTION_CLOSED, NULL); |
| 206 | } else { |
| 207 | // Refresh the list if we're showing it. |
| 208 | if (main_wnd_->current_ui() == MainWindow::LIST_PEERS) |
| 209 | main_wnd_->SwitchToPeerList(client_->peers()); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | void Conductor::OnMessageFromPeer(int peer_id, const std::string& message) { |
| 214 | ASSERT(peer_id_ == peer_id || peer_id_ == -1); |
| 215 | ASSERT(!message.empty()); |
| 216 | |
| 217 | if (!peer_connection_.get()) { |
| 218 | ASSERT(peer_id_ == -1); |
| 219 | peer_id_ = peer_id; |
| 220 | |
| 221 | if (!InitializePeerConnection()) { |
| 222 | LOG(LS_ERROR) << "Failed to initialize our PeerConnection instance"; |
| 223 | client_->SignOut(); |
| 224 | return; |
| 225 | } |
| 226 | } else if (peer_id != peer_id_) { |
| 227 | ASSERT(peer_id_ != -1); |
| 228 | LOG(WARNING) << "Received a message from unknown peer while already in a " |
| 229 | "conversation with a different peer."; |
| 230 | return; |
| 231 | } |
| 232 | |
| 233 | Json::Reader reader; |
| 234 | Json::Value jmessage; |
| 235 | if (!reader.parse(message, jmessage)) { |
| 236 | LOG(WARNING) << "Received unknown message. " << message; |
| 237 | return; |
| 238 | } |
| 239 | std::string type; |
| 240 | std::string json_object; |
| 241 | |
| 242 | GetStringFromJsonObject(jmessage, kSessionDescriptionTypeName, &type); |
| 243 | if (!type.empty()) { |
| 244 | std::string sdp; |
| 245 | if (!GetStringFromJsonObject(jmessage, kSessionDescriptionSdpName, &sdp)) { |
| 246 | LOG(WARNING) << "Can't parse received session description message."; |
| 247 | return; |
| 248 | } |
| 249 | webrtc::SessionDescriptionInterface* session_description( |
| 250 | webrtc::CreateSessionDescription(type, sdp)); |
| 251 | if (!session_description) { |
| 252 | LOG(WARNING) << "Can't parse received session description message."; |
| 253 | return; |
| 254 | } |
| 255 | LOG(INFO) << " Received session description :" << message; |
| 256 | peer_connection_->SetRemoteDescription( |
| 257 | DummySetSessionDescriptionObserver::Create(), session_description); |
| 258 | if (session_description->type() == |
| 259 | webrtc::SessionDescriptionInterface::kOffer) { |
| 260 | peer_connection_->CreateAnswer(this, NULL); |
| 261 | } |
| 262 | return; |
| 263 | } else { |
| 264 | std::string sdp_mid; |
| 265 | int sdp_mlineindex = 0; |
| 266 | std::string sdp; |
| 267 | if (!GetStringFromJsonObject(jmessage, kCandidateSdpMidName, &sdp_mid) || |
| 268 | !GetIntFromJsonObject(jmessage, kCandidateSdpMlineIndexName, |
| 269 | &sdp_mlineindex) || |
| 270 | !GetStringFromJsonObject(jmessage, kCandidateSdpName, &sdp)) { |
| 271 | LOG(WARNING) << "Can't parse received message."; |
| 272 | return; |
| 273 | } |
| 274 | talk_base::scoped_ptr<webrtc::IceCandidateInterface> candidate( |
| 275 | webrtc::CreateIceCandidate(sdp_mid, sdp_mlineindex, sdp)); |
| 276 | if (!candidate.get()) { |
| 277 | LOG(WARNING) << "Can't parse received candidate message."; |
| 278 | return; |
| 279 | } |
| 280 | if (!peer_connection_->AddIceCandidate(candidate.get())) { |
| 281 | LOG(WARNING) << "Failed to apply the received candidate"; |
| 282 | return; |
| 283 | } |
| 284 | LOG(INFO) << " Received candidate :" << message; |
| 285 | return; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | void Conductor::OnMessageSent(int err) { |
| 290 | // Process the next pending message if any. |
| 291 | main_wnd_->QueueUIThreadCallback(SEND_MESSAGE_TO_PEER, NULL); |
| 292 | } |
| 293 | |
| 294 | void Conductor::OnServerConnectionFailure() { |
| 295 | main_wnd_->MessageBox("Error", ("Failed to connect to " + server_).c_str(), |
| 296 | true); |
| 297 | } |
| 298 | |
| 299 | // |
| 300 | // MainWndCallback implementation. |
| 301 | // |
| 302 | |
| 303 | void Conductor::StartLogin(const std::string& server, int port) { |
| 304 | if (client_->is_connected()) |
| 305 | return; |
| 306 | server_ = server; |
| 307 | client_->Connect(server, port, GetPeerName()); |
| 308 | } |
| 309 | |
| 310 | void Conductor::DisconnectFromServer() { |
| 311 | if (client_->is_connected()) |
| 312 | client_->SignOut(); |
| 313 | } |
| 314 | |
| 315 | void Conductor::ConnectToPeer(int peer_id) { |
| 316 | ASSERT(peer_id_ == -1); |
| 317 | ASSERT(peer_id != -1); |
| 318 | |
| 319 | if (peer_connection_.get()) { |
| 320 | main_wnd_->MessageBox("Error", |
| 321 | "We only support connecting to one peer at a time", true); |
| 322 | return; |
| 323 | } |
| 324 | |
| 325 | if (InitializePeerConnection()) { |
| 326 | peer_id_ = peer_id; |
| 327 | peer_connection_->CreateOffer(this, NULL); |
| 328 | } else { |
| 329 | main_wnd_->MessageBox("Error", "Failed to initialize PeerConnection", true); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | cricket::VideoCapturer* Conductor::OpenVideoCaptureDevice() { |
| 334 | talk_base::scoped_ptr<cricket::DeviceManagerInterface> dev_manager( |
| 335 | cricket::DeviceManagerFactory::Create()); |
| 336 | if (!dev_manager->Init()) { |
| 337 | LOG(LS_ERROR) << "Can't create device manager"; |
| 338 | return NULL; |
| 339 | } |
| 340 | std::vector<cricket::Device> devs; |
| 341 | if (!dev_manager->GetVideoCaptureDevices(&devs)) { |
| 342 | LOG(LS_ERROR) << "Can't enumerate video devices"; |
| 343 | return NULL; |
| 344 | } |
| 345 | std::vector<cricket::Device>::iterator dev_it = devs.begin(); |
| 346 | cricket::VideoCapturer* capturer = NULL; |
| 347 | for (; dev_it != devs.end(); ++dev_it) { |
| 348 | capturer = dev_manager->CreateVideoCapturer(*dev_it); |
| 349 | if (capturer != NULL) |
| 350 | break; |
| 351 | } |
| 352 | return capturer; |
| 353 | } |
| 354 | |
| 355 | void Conductor::AddStreams() { |
| 356 | if (active_streams_.find(kStreamLabel) != active_streams_.end()) |
| 357 | return; // Already added. |
| 358 | |
| 359 | talk_base::scoped_refptr<webrtc::AudioTrackInterface> audio_track( |
| 360 | peer_connection_factory_->CreateAudioTrack( |
| 361 | kAudioLabel, peer_connection_factory_->CreateAudioSource(NULL))); |
| 362 | |
| 363 | talk_base::scoped_refptr<webrtc::VideoTrackInterface> video_track( |
| 364 | peer_connection_factory_->CreateVideoTrack( |
| 365 | kVideoLabel, |
| 366 | peer_connection_factory_->CreateVideoSource(OpenVideoCaptureDevice(), |
| 367 | NULL))); |
| 368 | main_wnd_->StartLocalRenderer(video_track); |
| 369 | |
| 370 | talk_base::scoped_refptr<webrtc::MediaStreamInterface> stream = |
| 371 | peer_connection_factory_->CreateLocalMediaStream(kStreamLabel); |
| 372 | |
| 373 | stream->AddTrack(audio_track); |
| 374 | stream->AddTrack(video_track); |
| 375 | if (!peer_connection_->AddStream(stream, NULL)) { |
| 376 | LOG(LS_ERROR) << "Adding stream to PeerConnection failed"; |
| 377 | } |
| 378 | typedef std::pair<std::string, |
| 379 | talk_base::scoped_refptr<webrtc::MediaStreamInterface> > |
| 380 | MediaStreamPair; |
| 381 | active_streams_.insert(MediaStreamPair(stream->label(), stream)); |
| 382 | main_wnd_->SwitchToStreamingUI(); |
| 383 | } |
| 384 | |
| 385 | void Conductor::DisconnectFromCurrentPeer() { |
| 386 | LOG(INFO) << __FUNCTION__; |
| 387 | if (peer_connection_.get()) { |
| 388 | client_->SendHangUp(peer_id_); |
| 389 | DeletePeerConnection(); |
| 390 | } |
| 391 | |
| 392 | if (main_wnd_->IsWindow()) |
| 393 | main_wnd_->SwitchToPeerList(client_->peers()); |
| 394 | } |
| 395 | |
| 396 | void Conductor::UIThreadCallback(int msg_id, void* data) { |
| 397 | switch (msg_id) { |
| 398 | case PEER_CONNECTION_CLOSED: |
| 399 | LOG(INFO) << "PEER_CONNECTION_CLOSED"; |
| 400 | DeletePeerConnection(); |
| 401 | |
| 402 | ASSERT(active_streams_.empty()); |
| 403 | |
| 404 | if (main_wnd_->IsWindow()) { |
| 405 | if (client_->is_connected()) { |
| 406 | main_wnd_->SwitchToPeerList(client_->peers()); |
| 407 | } else { |
| 408 | main_wnd_->SwitchToConnectUI(); |
| 409 | } |
| 410 | } else { |
| 411 | DisconnectFromServer(); |
| 412 | } |
| 413 | break; |
| 414 | |
| 415 | case SEND_MESSAGE_TO_PEER: { |
| 416 | LOG(INFO) << "SEND_MESSAGE_TO_PEER"; |
| 417 | std::string* msg = reinterpret_cast<std::string*>(data); |
| 418 | if (msg) { |
| 419 | // For convenience, we always run the message through the queue. |
| 420 | // This way we can be sure that messages are sent to the server |
| 421 | // in the same order they were signaled without much hassle. |
| 422 | pending_messages_.push_back(msg); |
| 423 | } |
| 424 | |
| 425 | if (!pending_messages_.empty() && !client_->IsSendingMessage()) { |
| 426 | msg = pending_messages_.front(); |
| 427 | pending_messages_.pop_front(); |
| 428 | |
| 429 | if (!client_->SendToPeer(peer_id_, *msg) && peer_id_ != -1) { |
| 430 | LOG(LS_ERROR) << "SendToPeer failed"; |
| 431 | DisconnectFromServer(); |
| 432 | } |
| 433 | delete msg; |
| 434 | } |
| 435 | |
| 436 | if (!peer_connection_.get()) |
| 437 | peer_id_ = -1; |
| 438 | |
| 439 | break; |
| 440 | } |
| 441 | |
| 442 | case PEER_CONNECTION_ERROR: |
| 443 | main_wnd_->MessageBox("Error", "an unknown error occurred", true); |
| 444 | break; |
| 445 | |
| 446 | case NEW_STREAM_ADDED: { |
| 447 | webrtc::MediaStreamInterface* stream = |
| 448 | reinterpret_cast<webrtc::MediaStreamInterface*>( |
| 449 | data); |
| 450 | webrtc::VideoTrackVector tracks = stream->GetVideoTracks(); |
| 451 | // Only render the first track. |
| 452 | if (!tracks.empty()) { |
| 453 | webrtc::VideoTrackInterface* track = tracks[0]; |
| 454 | main_wnd_->StartRemoteRenderer(track); |
| 455 | } |
| 456 | stream->Release(); |
| 457 | break; |
| 458 | } |
| 459 | |
| 460 | case STREAM_REMOVED: { |
| 461 | // Remote peer stopped sending a stream. |
| 462 | webrtc::MediaStreamInterface* stream = |
| 463 | reinterpret_cast<webrtc::MediaStreamInterface*>( |
| 464 | data); |
| 465 | stream->Release(); |
| 466 | break; |
| 467 | } |
| 468 | |
| 469 | default: |
| 470 | ASSERT(false); |
| 471 | break; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | void Conductor::OnSuccess(webrtc::SessionDescriptionInterface* desc) { |
| 476 | peer_connection_->SetLocalDescription( |
| 477 | DummySetSessionDescriptionObserver::Create(), desc); |
| 478 | Json::StyledWriter writer; |
| 479 | Json::Value jmessage; |
| 480 | jmessage[kSessionDescriptionTypeName] = desc->type(); |
| 481 | std::string sdp; |
| 482 | desc->ToString(&sdp); |
| 483 | jmessage[kSessionDescriptionSdpName] = sdp; |
| 484 | SendMessage(writer.write(jmessage)); |
| 485 | } |
| 486 | |
| 487 | void Conductor::OnFailure(const std::string& error) { |
| 488 | LOG(LERROR) << error; |
| 489 | } |
| 490 | |
| 491 | void Conductor::SendMessage(const std::string& json_object) { |
| 492 | std::string* msg = new std::string(json_object); |
| 493 | main_wnd_->QueueUIThreadCallback(SEND_MESSAGE_TO_PEER, msg); |
| 494 | } |