1package eu.siacs.conversations.xmpp.jingle;
2
3import android.content.Context;
4import android.os.Build;
5import android.os.Handler;
6import android.os.Looper;
7import android.util.Log;
8
9import com.google.common.base.Optional;
10import com.google.common.base.Preconditions;
11import com.google.common.collect.ImmutableSet;
12import com.google.common.util.concurrent.Futures;
13import com.google.common.util.concurrent.ListenableFuture;
14import com.google.common.util.concurrent.MoreExecutors;
15import com.google.common.util.concurrent.SettableFuture;
16
17import org.webrtc.AudioSource;
18import org.webrtc.AudioTrack;
19import org.webrtc.CandidatePairChangeEvent;
20import org.webrtc.DataChannel;
21import org.webrtc.DefaultVideoDecoderFactory;
22import org.webrtc.DefaultVideoEncoderFactory;
23import org.webrtc.EglBase;
24import org.webrtc.IceCandidate;
25import org.webrtc.MediaConstraints;
26import org.webrtc.MediaStream;
27import org.webrtc.MediaStreamTrack;
28import org.webrtc.PeerConnection;
29import org.webrtc.PeerConnectionFactory;
30import org.webrtc.RtpReceiver;
31import org.webrtc.RtpTransceiver;
32import org.webrtc.SdpObserver;
33import org.webrtc.SessionDescription;
34import org.webrtc.VideoTrack;
35import org.webrtc.audio.JavaAudioDeviceModule;
36import org.webrtc.voiceengine.WebRtcAudioEffects;
37
38import java.util.LinkedList;
39import java.util.List;
40import java.util.Queue;
41import java.util.Set;
42import java.util.concurrent.ExecutorService;
43import java.util.concurrent.Executors;
44import java.util.concurrent.atomic.AtomicBoolean;
45
46import javax.annotation.Nonnull;
47import javax.annotation.Nullable;
48
49import eu.siacs.conversations.Config;
50import eu.siacs.conversations.services.AppRTCAudioManager;
51import eu.siacs.conversations.services.XmppConnectionService;
52
53@SuppressWarnings("UnstableApiUsage")
54public class WebRTCWrapper {
55
56 private static final String EXTENDED_LOGGING_TAG = WebRTCWrapper.class.getSimpleName();
57
58 private final ExecutorService executorService = Executors.newSingleThreadExecutor();
59
60 private static final Set<String> HARDWARE_AEC_BLACKLIST =
61 new ImmutableSet.Builder<String>()
62 .add("Pixel")
63 .add("Pixel XL")
64 .add("Moto G5")
65 .add("Moto G (5S) Plus")
66 .add("Moto G4")
67 .add("TA-1053")
68 .add("Mi A1")
69 .add("Mi A2")
70 .add("E5823") // Sony z5 compact
71 .add("Redmi Note 5")
72 .add("FP2") // Fairphone FP2
73 .add("MI 5")
74 .add("GT-I9515") // Samsung Galaxy S4 Value Edition (jfvelte)
75 .add("GT-I9515L") // Samsung Galaxy S4 Value Edition (jfvelte)
76 .add("GT-I9505") // Samsung Galaxy S4 (jfltexx)
77 .build();
78
79 private final EventCallback eventCallback;
80 private final AtomicBoolean readyToReceivedIceCandidates = new AtomicBoolean(false);
81 private final Queue<IceCandidate> iceCandidates = new LinkedList<>();
82 private final AppRTCAudioManager.AudioManagerEvents audioManagerEvents =
83 new AppRTCAudioManager.AudioManagerEvents() {
84 @Override
85 public void onAudioDeviceChanged(
86 AppRTCAudioManager.AudioDevice selectedAudioDevice,
87 Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
88 eventCallback.onAudioDeviceChanged(selectedAudioDevice, availableAudioDevices);
89 }
90 };
91 private final Handler mainHandler = new Handler(Looper.getMainLooper());
92 private TrackWrapper<AudioTrack> localAudioTrack = null;
93 private TrackWrapper<VideoTrack> localVideoTrack = null;
94 private VideoTrack remoteVideoTrack = null;
95 private final PeerConnection.Observer peerConnectionObserver =
96 new PeerConnection.Observer() {
97 @Override
98 public void onSignalingChange(PeerConnection.SignalingState signalingState) {
99 Log.d(EXTENDED_LOGGING_TAG, "onSignalingChange(" + signalingState + ")");
100 // this is called after removeTrack or addTrack
101 // and should then trigger a content-add or content-remove or something
102 // https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/removeTrack
103 }
104
105 @Override
106 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
107 eventCallback.onConnectionChange(newState);
108 }
109
110 @Override
111 public void onIceConnectionChange(
112 PeerConnection.IceConnectionState iceConnectionState) {
113 Log.d(
114 EXTENDED_LOGGING_TAG,
115 "onIceConnectionChange(" + iceConnectionState + ")");
116 }
117
118 @Override
119 public void onSelectedCandidatePairChanged(CandidatePairChangeEvent event) {
120 Log.d(Config.LOGTAG, "remote candidate selected: " + event.remote);
121 Log.d(Config.LOGTAG, "local candidate selected: " + event.local);
122 }
123
124 @Override
125 public void onIceConnectionReceivingChange(boolean b) {}
126
127 @Override
128 public void onIceGatheringChange(
129 PeerConnection.IceGatheringState iceGatheringState) {
130 Log.d(EXTENDED_LOGGING_TAG, "onIceGatheringChange(" + iceGatheringState + ")");
131 }
132
133 @Override
134 public void onIceCandidate(IceCandidate iceCandidate) {
135 if (readyToReceivedIceCandidates.get()) {
136 eventCallback.onIceCandidate(iceCandidate);
137 } else {
138 iceCandidates.add(iceCandidate);
139 }
140 }
141
142 @Override
143 public void onIceCandidatesRemoved(IceCandidate[] iceCandidates) {}
144
145 @Override
146 public void onAddStream(MediaStream mediaStream) {
147 Log.d(
148 EXTENDED_LOGGING_TAG,
149 "onAddStream(numAudioTracks="
150 + mediaStream.audioTracks.size()
151 + ",numVideoTracks="
152 + mediaStream.videoTracks.size()
153 + ")");
154 }
155
156 @Override
157 public void onRemoveStream(MediaStream mediaStream) {}
158
159 @Override
160 public void onDataChannel(DataChannel dataChannel) {}
161
162 @Override
163 public void onRenegotiationNeeded() {
164 Log.d(EXTENDED_LOGGING_TAG, "onRenegotiationNeeded()");
165 final PeerConnection.PeerConnectionState currentState =
166 peerConnection == null ? null : peerConnection.connectionState();
167 if (currentState != null
168 && currentState != PeerConnection.PeerConnectionState.NEW) {
169 eventCallback.onRenegotiationNeeded();
170 }
171 }
172
173 @Override
174 public void onAddTrack(RtpReceiver rtpReceiver, MediaStream[] mediaStreams) {
175 final MediaStreamTrack track = rtpReceiver.track();
176 Log.d(
177 EXTENDED_LOGGING_TAG,
178 "onAddTrack(kind="
179 + (track == null ? "null" : track.kind())
180 + ",numMediaStreams="
181 + mediaStreams.length
182 + ")");
183 if (track instanceof VideoTrack) {
184 remoteVideoTrack = (VideoTrack) track;
185 }
186 }
187
188 @Override
189 public void onTrack(final RtpTransceiver transceiver) {
190 Log.d(
191 EXTENDED_LOGGING_TAG,
192 "onTrack(mid="
193 + transceiver.getMid()
194 + ",media="
195 + transceiver.getMediaType()
196 + ",direction="
197 + transceiver.getDirection()
198 + ")");
199 }
200
201 @Override
202 public void onRemoveTrack(final RtpReceiver receiver) {
203 Log.d(EXTENDED_LOGGING_TAG, "onRemoveTrack(" + receiver.id() + ")");
204 }
205 };
206 @Nullable private PeerConnectionFactory peerConnectionFactory = null;
207 @Nullable private PeerConnection peerConnection = null;
208 private AppRTCAudioManager appRTCAudioManager = null;
209 private ToneManager toneManager = null;
210 private Context context = null;
211 private EglBase eglBase = null;
212 private VideoSourceWrapper videoSourceWrapper;
213
214 WebRTCWrapper(final EventCallback eventCallback) {
215 this.eventCallback = eventCallback;
216 }
217
218 private static void dispose(final PeerConnection peerConnection) {
219 try {
220 peerConnection.dispose();
221 } catch (final IllegalStateException e) {
222 Log.e(Config.LOGTAG, "unable to dispose of peer connection", e);
223 }
224 }
225
226 public void setup(
227 final XmppConnectionService service,
228 @Nonnull final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference)
229 throws InitializationException {
230 try {
231 PeerConnectionFactory.initialize(
232 PeerConnectionFactory.InitializationOptions.builder(service)
233 .setFieldTrials("WebRTC-BindUsingInterfaceName/Enabled/")
234 .createInitializationOptions());
235 } catch (final UnsatisfiedLinkError e) {
236 throw new InitializationException("Unable to initialize PeerConnectionFactory", e);
237 }
238 try {
239 this.eglBase = EglBase.create();
240 } catch (final RuntimeException e) {
241 throw new InitializationException("Unable to create EGL base", e);
242 }
243 this.context = service;
244 this.toneManager = service.getJingleConnectionManager().toneManager;
245 mainHandler.post(
246 () -> {
247 appRTCAudioManager = AppRTCAudioManager.create(service, speakerPhonePreference);
248 toneManager.setAppRtcAudioManagerHasControl(true);
249 appRTCAudioManager.start(audioManagerEvents);
250 eventCallback.onAudioDeviceChanged(
251 appRTCAudioManager.getSelectedAudioDevice(),
252 appRTCAudioManager.getAudioDevices());
253 });
254 }
255
256 synchronized void initializePeerConnection(
257 final Set<Media> media, final List<PeerConnection.IceServer> iceServers)
258 throws InitializationException {
259 Preconditions.checkState(this.eglBase != null);
260 Preconditions.checkNotNull(media);
261 Preconditions.checkArgument(
262 media.size() > 0, "media can not be empty when initializing peer connection");
263 final boolean setUseHardwareAcousticEchoCanceler =
264 WebRtcAudioEffects.canUseAcousticEchoCanceler()
265 && !HARDWARE_AEC_BLACKLIST.contains(Build.MODEL);
266 Log.d(
267 Config.LOGTAG,
268 String.format(
269 "setUseHardwareAcousticEchoCanceler(%s) model=%s",
270 setUseHardwareAcousticEchoCanceler, Build.MODEL));
271 this.peerConnectionFactory =
272 PeerConnectionFactory.builder()
273 .setVideoDecoderFactory(
274 new DefaultVideoDecoderFactory(eglBase.getEglBaseContext()))
275 .setVideoEncoderFactory(
276 new DefaultVideoEncoderFactory(
277 eglBase.getEglBaseContext(), true, true))
278 .setAudioDeviceModule(
279 JavaAudioDeviceModule.builder(requireContext())
280 .setUseHardwareAcousticEchoCanceler(
281 setUseHardwareAcousticEchoCanceler)
282 .createAudioDeviceModule())
283 .createPeerConnectionFactory();
284
285 final PeerConnection.RTCConfiguration rtcConfig = buildConfiguration(iceServers);
286 final PeerConnection peerConnection =
287 requirePeerConnectionFactory()
288 .createPeerConnection(rtcConfig, peerConnectionObserver);
289 if (peerConnection == null) {
290 throw new InitializationException("Unable to create PeerConnection");
291 }
292
293 if (media.contains(Media.VIDEO)) {
294 addVideoTrack(peerConnection);
295 }
296
297 if (media.contains(Media.AUDIO)) {
298 addAudioTrack(peerConnection);
299 }
300 peerConnection.setAudioPlayout(true);
301 peerConnection.setAudioRecording(true);
302
303 this.peerConnection = peerConnection;
304 }
305
306 private VideoSourceWrapper initializeVideoSourceWrapper() {
307 final VideoSourceWrapper existingVideoSourceWrapper = this.videoSourceWrapper;
308 if (existingVideoSourceWrapper != null) {
309 existingVideoSourceWrapper.startCapture();
310 return existingVideoSourceWrapper;
311 }
312 final VideoSourceWrapper videoSourceWrapper =
313 new VideoSourceWrapper.Factory(requireContext()).create();
314 if (videoSourceWrapper == null) {
315 throw new IllegalStateException("Could not instantiate VideoSourceWrapper");
316 }
317 videoSourceWrapper.initialize(
318 requirePeerConnectionFactory(), requireContext(), eglBase.getEglBaseContext());
319 videoSourceWrapper.startCapture();
320 this.videoSourceWrapper = videoSourceWrapper;
321 return videoSourceWrapper;
322 }
323
324 public synchronized boolean addTrack(final Media media) {
325 if (media == Media.VIDEO) {
326 return addVideoTrack(requirePeerConnection());
327 } else if (media == Media.AUDIO) {
328 return addAudioTrack(requirePeerConnection());
329 }
330 throw new IllegalStateException(String.format("Could not add track for %s", media));
331 }
332
333 public synchronized void removeTrack(final Media media) {
334 if (media == Media.VIDEO) {
335 removeVideoTrack(requirePeerConnection());
336 }
337 }
338
339 private boolean addAudioTrack(final PeerConnection peerConnection) {
340 final AudioSource audioSource =
341 requirePeerConnectionFactory().createAudioSource(new MediaConstraints());
342 final AudioTrack audioTrack =
343 requirePeerConnectionFactory()
344 .createAudioTrack(TrackWrapper.id(AudioTrack.class), audioSource);
345 this.localAudioTrack = TrackWrapper.addTrack(peerConnection, audioTrack);
346 return true;
347 }
348
349 private boolean addVideoTrack(final PeerConnection peerConnection) {
350 final TrackWrapper<VideoTrack> existing = this.localVideoTrack;
351 if (existing != null) {
352 final RtpTransceiver transceiver =
353 TrackWrapper.getTransceiver(peerConnection, existing);
354 if (transceiver == null) {
355 Log.w(EXTENDED_LOGGING_TAG, "unable to restart video transceiver");
356 return false;
357 }
358 transceiver.setDirection(RtpTransceiver.RtpTransceiverDirection.SEND_RECV);
359 this.videoSourceWrapper.startCapture();
360 return true;
361 }
362 final VideoSourceWrapper videoSourceWrapper;
363 try {
364 videoSourceWrapper = initializeVideoSourceWrapper();
365 } catch (final IllegalStateException e) {
366 Log.d(Config.LOGTAG, "could not add video track", e);
367 return false;
368 }
369 final VideoTrack videoTrack =
370 requirePeerConnectionFactory()
371 .createVideoTrack(
372 TrackWrapper.id(VideoTrack.class),
373 videoSourceWrapper.getVideoSource());
374 this.localVideoTrack = TrackWrapper.addTrack(peerConnection, videoTrack);
375 return true;
376 }
377
378 private void removeVideoTrack(final PeerConnection peerConnection) {
379 final TrackWrapper<VideoTrack> localVideoTrack = this.localVideoTrack;
380 if (localVideoTrack != null) {
381
382 final RtpTransceiver exactTransceiver =
383 TrackWrapper.getTransceiver(peerConnection, localVideoTrack);
384 if (exactTransceiver == null) {
385 throw new IllegalStateException();
386 }
387 exactTransceiver.setDirection(RtpTransceiver.RtpTransceiverDirection.INACTIVE);
388 }
389 final VideoSourceWrapper videoSourceWrapper = this.videoSourceWrapper;
390 if (videoSourceWrapper != null) {
391 try {
392 videoSourceWrapper.stopCapture();
393 } catch (InterruptedException e) {
394 e.printStackTrace();
395 }
396 }
397 }
398
399 private static PeerConnection.RTCConfiguration buildConfiguration(
400 final List<PeerConnection.IceServer> iceServers) {
401 final PeerConnection.RTCConfiguration rtcConfig =
402 new PeerConnection.RTCConfiguration(iceServers);
403 rtcConfig.tcpCandidatePolicy =
404 PeerConnection.TcpCandidatePolicy.DISABLED; // XEP-0176 doesn't support tcp
405 rtcConfig.continualGatheringPolicy =
406 PeerConnection.ContinualGatheringPolicy.GATHER_CONTINUALLY;
407 rtcConfig.sdpSemantics = PeerConnection.SdpSemantics.UNIFIED_PLAN;
408 rtcConfig.rtcpMuxPolicy = PeerConnection.RtcpMuxPolicy.NEGOTIATE;
409 rtcConfig.enableImplicitRollback = true;
410 return rtcConfig;
411 }
412
413 void reconfigurePeerConnection(final List<PeerConnection.IceServer> iceServers) {
414 requirePeerConnection().setConfiguration(buildConfiguration(iceServers));
415 }
416
417 void restartIce() {
418 executorService.execute(
419 () -> {
420 final PeerConnection peerConnection;
421 try {
422 peerConnection = requirePeerConnection();
423 } catch (final PeerConnectionNotInitialized e) {
424 Log.w(
425 EXTENDED_LOGGING_TAG,
426 "PeerConnection vanished before we could execute restart");
427 return;
428 }
429 setIsReadyToReceiveIceCandidates(false);
430 peerConnection.restartIce();
431 });
432 }
433
434 public void setIsReadyToReceiveIceCandidates(final boolean ready) {
435 readyToReceivedIceCandidates.set(ready);
436 final int was = iceCandidates.size();
437 while (ready && iceCandidates.peek() != null) {
438 eventCallback.onIceCandidate(iceCandidates.poll());
439 }
440 final int is = iceCandidates.size();
441 Log.d(
442 EXTENDED_LOGGING_TAG,
443 "setIsReadyToReceiveCandidates(" + ready + ") was=" + was + " is=" + is);
444 }
445
446 synchronized void close() {
447 final PeerConnection peerConnection = this.peerConnection;
448 final PeerConnectionFactory peerConnectionFactory = this.peerConnectionFactory;
449 final VideoSourceWrapper videoSourceWrapper = this.videoSourceWrapper;
450 final AppRTCAudioManager audioManager = this.appRTCAudioManager;
451 final EglBase eglBase = this.eglBase;
452 if (peerConnection != null) {
453 this.peerConnection = null;
454 dispose(peerConnection);
455 }
456 if (audioManager != null) {
457 toneManager.setAppRtcAudioManagerHasControl(false);
458 mainHandler.post(audioManager::stop);
459 }
460 this.localVideoTrack = null;
461 this.remoteVideoTrack = null;
462 if (videoSourceWrapper != null) {
463 try {
464 videoSourceWrapper.stopCapture();
465 } catch (final InterruptedException e) {
466 Log.e(Config.LOGTAG, "unable to stop capturing");
467 }
468 videoSourceWrapper.dispose();
469 }
470 if (eglBase != null) {
471 eglBase.release();
472 this.eglBase = null;
473 }
474 if (peerConnectionFactory != null) {
475 this.peerConnectionFactory = null;
476 peerConnectionFactory.dispose();
477 }
478 }
479
480 synchronized void verifyClosed() {
481 if (this.peerConnection != null
482 || this.eglBase != null
483 || this.localVideoTrack != null
484 || this.remoteVideoTrack != null) {
485 final IllegalStateException e =
486 new IllegalStateException("WebRTCWrapper hasn't been closed properly");
487 Log.e(Config.LOGTAG, "verifyClosed() failed. Going to throw", e);
488 throw e;
489 }
490 }
491
492 boolean isCameraSwitchable() {
493 final VideoSourceWrapper videoSourceWrapper = this.videoSourceWrapper;
494 return videoSourceWrapper != null && videoSourceWrapper.isCameraSwitchable();
495 }
496
497 boolean isFrontCamera() {
498 final VideoSourceWrapper videoSourceWrapper = this.videoSourceWrapper;
499 return videoSourceWrapper == null || videoSourceWrapper.isFrontCamera();
500 }
501
502 ListenableFuture<Boolean> switchCamera() {
503 final VideoSourceWrapper videoSourceWrapper = this.videoSourceWrapper;
504 if (videoSourceWrapper == null) {
505 return Futures.immediateFailedFuture(
506 new IllegalStateException("VideoSourceWrapper has not been initialized"));
507 }
508 return videoSourceWrapper.switchCamera();
509 }
510
511 boolean isMicrophoneEnabled() {
512 final Optional<AudioTrack> audioTrack =
513 TrackWrapper.get(peerConnection, this.localAudioTrack);
514 if (audioTrack.isPresent()) {
515 try {
516 return audioTrack.get().enabled();
517 } catch (final IllegalStateException e) {
518 // sometimes UI might still be rendering the buttons when a background thread has
519 // already ended the call
520 return false;
521 }
522 } else {
523 throw new IllegalStateException("Local audio track does not exist (yet)");
524 }
525 }
526
527 boolean setMicrophoneEnabled(final boolean enabled) {
528 final Optional<AudioTrack> audioTrack =
529 TrackWrapper.get(peerConnection, this.localAudioTrack);
530 if (audioTrack.isPresent()) {
531 try {
532 audioTrack.get().setEnabled(enabled);
533 return true;
534 } catch (final IllegalStateException e) {
535 Log.d(Config.LOGTAG, "unable to toggle microphone", e);
536 // ignoring race condition in case MediaStreamTrack has been disposed
537 return false;
538 }
539 } else {
540 throw new IllegalStateException("Local audio track does not exist (yet)");
541 }
542 }
543
544 boolean isVideoEnabled() {
545 final Optional<VideoTrack> videoTrack =
546 TrackWrapper.get(peerConnection, this.localVideoTrack);
547 if (videoTrack.isPresent()) {
548 return videoTrack.get().enabled();
549 }
550 return false;
551 }
552
553 void setVideoEnabled(final boolean enabled) {
554 final Optional<VideoTrack> videoTrack =
555 TrackWrapper.get(peerConnection, this.localVideoTrack);
556 if (videoTrack.isPresent()) {
557 videoTrack.get().setEnabled(enabled);
558 return;
559 }
560 throw new IllegalStateException("Local video track does not exist");
561 }
562
563 synchronized ListenableFuture<SessionDescription> setLocalDescription() {
564 return Futures.transformAsync(
565 getPeerConnectionFuture(),
566 peerConnection -> {
567 if (peerConnection == null) {
568 return Futures.immediateFailedFuture(
569 new IllegalStateException("PeerConnection was null"));
570 }
571 final SettableFuture<SessionDescription> future = SettableFuture.create();
572 peerConnection.setLocalDescription(
573 new SetSdpObserver() {
574 @Override
575 public void onSetSuccess() {
576 final SessionDescription description =
577 peerConnection.getLocalDescription();
578 Log.d(EXTENDED_LOGGING_TAG, "set local description:");
579 logDescription(description);
580 future.set(description);
581 }
582
583 @Override
584 public void onSetFailure(final String message) {
585 future.setException(
586 new FailureToSetDescriptionException(message));
587 }
588 });
589 return future;
590 },
591 MoreExecutors.directExecutor());
592 }
593
594 public static void logDescription(final SessionDescription sessionDescription) {
595 for (final String line :
596 sessionDescription.description.split(
597 eu.siacs.conversations.xmpp.jingle.SessionDescription.LINE_DIVIDER)) {
598 Log.d(EXTENDED_LOGGING_TAG, line);
599 }
600 }
601
602 synchronized ListenableFuture<Void> setRemoteDescription(
603 final SessionDescription sessionDescription) {
604 Log.d(EXTENDED_LOGGING_TAG, "setting remote description:");
605 logDescription(sessionDescription);
606 return Futures.transformAsync(
607 getPeerConnectionFuture(),
608 peerConnection -> {
609 if (peerConnection == null) {
610 return Futures.immediateFailedFuture(
611 new IllegalStateException("PeerConnection was null"));
612 }
613 final SettableFuture<Void> future = SettableFuture.create();
614 peerConnection.setRemoteDescription(
615 new SetSdpObserver() {
616 @Override
617 public void onSetSuccess() {
618 future.set(null);
619 }
620
621 @Override
622 public void onSetFailure(final String message) {
623 future.setException(
624 new FailureToSetDescriptionException(message));
625 }
626 },
627 sessionDescription);
628 return future;
629 },
630 MoreExecutors.directExecutor());
631 }
632
633 @Nonnull
634 private ListenableFuture<PeerConnection> getPeerConnectionFuture() {
635 final PeerConnection peerConnection = this.peerConnection;
636 if (peerConnection == null) {
637 return Futures.immediateFailedFuture(new PeerConnectionNotInitialized());
638 } else {
639 return Futures.immediateFuture(peerConnection);
640 }
641 }
642
643 @Nonnull
644 private PeerConnection requirePeerConnection() {
645 final PeerConnection peerConnection = this.peerConnection;
646 if (peerConnection == null) {
647 throw new PeerConnectionNotInitialized();
648 }
649 return peerConnection;
650 }
651
652 @Nonnull
653 private PeerConnectionFactory requirePeerConnectionFactory() {
654 final PeerConnectionFactory peerConnectionFactory = this.peerConnectionFactory;
655 if (peerConnectionFactory == null) {
656 throw new IllegalStateException("Make sure PeerConnectionFactory is initialized");
657 }
658 return peerConnectionFactory;
659 }
660
661 void addIceCandidate(IceCandidate iceCandidate) {
662 requirePeerConnection().addIceCandidate(iceCandidate);
663 }
664
665 PeerConnection.PeerConnectionState getState() {
666 return requirePeerConnection().connectionState();
667 }
668
669 public PeerConnection.SignalingState getSignalingState() {
670 try {
671 return requirePeerConnection().signalingState();
672 } catch (final IllegalStateException e) {
673 return PeerConnection.SignalingState.CLOSED;
674 }
675 }
676
677 EglBase.Context getEglBaseContext() {
678 return this.eglBase.getEglBaseContext();
679 }
680
681 Optional<VideoTrack> getLocalVideoTrack() {
682 return TrackWrapper.get(peerConnection, this.localVideoTrack);
683 }
684
685 Optional<VideoTrack> getRemoteVideoTrack() {
686 return Optional.fromNullable(this.remoteVideoTrack);
687 }
688
689 private Context requireContext() {
690 final Context context = this.context;
691 if (context == null) {
692 throw new IllegalStateException("call setup first");
693 }
694 return context;
695 }
696
697 AppRTCAudioManager getAudioManager() {
698 return appRTCAudioManager;
699 }
700
701 void execute(final Runnable command) {
702 executorService.execute(command);
703 }
704
705 public void switchSpeakerPhonePreference(AppRTCAudioManager.SpeakerPhonePreference preference) {
706 mainHandler.post(() -> appRTCAudioManager.switchSpeakerPhonePreference(preference));
707 }
708
709 public interface EventCallback {
710 void onIceCandidate(IceCandidate iceCandidate);
711
712 void onConnectionChange(PeerConnection.PeerConnectionState newState);
713
714 void onAudioDeviceChanged(
715 AppRTCAudioManager.AudioDevice selectedAudioDevice,
716 Set<AppRTCAudioManager.AudioDevice> availableAudioDevices);
717
718 void onRenegotiationNeeded();
719 }
720
721 private abstract static class SetSdpObserver implements SdpObserver {
722
723 @Override
724 public void onCreateSuccess(org.webrtc.SessionDescription sessionDescription) {
725 throw new IllegalStateException("Not able to use SetSdpObserver");
726 }
727
728 @Override
729 public void onCreateFailure(String s) {
730 throw new IllegalStateException("Not able to use SetSdpObserver");
731 }
732 }
733
734 static class InitializationException extends Exception {
735
736 private InitializationException(final String message, final Throwable throwable) {
737 super(message, throwable);
738 }
739
740 private InitializationException(final String message) {
741 super(message);
742 }
743 }
744
745 public static class PeerConnectionNotInitialized extends IllegalStateException {
746
747 private PeerConnectionNotInitialized() {
748 super("initialize PeerConnection first");
749 }
750 }
751
752 private static class FailureToSetDescriptionException extends IllegalArgumentException {
753 public FailureToSetDescriptionException(String message) {
754 super(message);
755 }
756 }
757}