1package eu.siacs.conversations.xmpp.jingle;
2
3import android.content.Context;
4import android.media.ToneGenerator;
5import android.os.Build;
6import android.os.Handler;
7import android.os.Looper;
8import android.util.Log;
9
10import com.google.common.base.Optional;
11import com.google.common.base.Preconditions;
12import com.google.common.collect.ImmutableMap;
13import com.google.common.collect.ImmutableSet;
14import com.google.common.collect.Iterables;
15import com.google.common.util.concurrent.Futures;
16import com.google.common.util.concurrent.ListenableFuture;
17import com.google.common.util.concurrent.MoreExecutors;
18import com.google.common.util.concurrent.SettableFuture;
19
20import org.webrtc.AudioSource;
21import org.webrtc.AudioTrack;
22import org.webrtc.Camera2Enumerator;
23import org.webrtc.CameraEnumerationAndroid;
24import org.webrtc.CameraEnumerator;
25import org.webrtc.CameraVideoCapturer;
26import org.webrtc.CandidatePairChangeEvent;
27import org.webrtc.DataChannel;
28import org.webrtc.DefaultVideoDecoderFactory;
29import org.webrtc.DefaultVideoEncoderFactory;
30import org.webrtc.DtmfSender;
31import org.webrtc.EglBase;
32import org.webrtc.IceCandidate;
33import org.webrtc.MediaConstraints;
34import org.webrtc.MediaStream;
35import org.webrtc.MediaStreamTrack;
36import org.webrtc.PeerConnection;
37import org.webrtc.PeerConnectionFactory;
38import org.webrtc.RtpReceiver;
39import org.webrtc.RtpTransceiver;
40import org.webrtc.SdpObserver;
41import org.webrtc.SessionDescription;
42import org.webrtc.SurfaceTextureHelper;
43import org.webrtc.VideoSource;
44import org.webrtc.VideoTrack;
45import org.webrtc.audio.JavaAudioDeviceModule;
46import org.webrtc.voiceengine.WebRtcAudioEffects;
47
48import java.util.ArrayList;
49import java.util.Collections;
50import java.util.LinkedList;
51import java.util.List;
52import java.util.Queue;
53import java.util.Map;
54import java.util.Set;
55import java.util.concurrent.ExecutorService;
56import java.util.concurrent.Executors;
57import java.util.concurrent.atomic.AtomicBoolean;
58
59import javax.annotation.Nonnull;
60import javax.annotation.Nullable;
61
62import eu.siacs.conversations.Config;
63import eu.siacs.conversations.services.AppRTCAudioManager;
64import eu.siacs.conversations.services.XmppConnectionService;
65
66public class WebRTCWrapper {
67
68 private static final String EXTENDED_LOGGING_TAG = WebRTCWrapper.class.getSimpleName();
69
70 private final ExecutorService executorService = Executors.newSingleThreadExecutor();
71
72 private static final Set<String> HARDWARE_AEC_BLACKLIST = new ImmutableSet.Builder<String>()
73 .add("Pixel")
74 .add("Pixel XL")
75 .add("Moto G5")
76 .add("Moto G (5S) Plus")
77 .add("Moto G4")
78 .add("TA-1053")
79 .add("Mi A1")
80 .add("Mi A2")
81 .add("E5823") // Sony z5 compact
82 .add("Redmi Note 5")
83 .add("FP2") // Fairphone FP2
84 .add("MI 5")
85 .add("GT-I9515") // Samsung Galaxy S4 Value Edition (jfvelte)
86 .add("GT-I9515L") // Samsung Galaxy S4 Value Edition (jfvelte)
87 .add("GT-I9505") // Samsung Galaxy S4 (jfltexx)
88 .build();
89
90 private static final int TONE_DURATION = 500;
91 private static final Map<String,Integer> TONE_CODES;
92 static {
93 ImmutableMap.Builder<String,Integer> builder = new ImmutableMap.Builder<>();
94 builder.put("0", ToneGenerator.TONE_DTMF_0);
95 builder.put("1", ToneGenerator.TONE_DTMF_1);
96 builder.put("2", ToneGenerator.TONE_DTMF_2);
97 builder.put("3", ToneGenerator.TONE_DTMF_3);
98 builder.put("4", ToneGenerator.TONE_DTMF_4);
99 builder.put("5", ToneGenerator.TONE_DTMF_5);
100 builder.put("6", ToneGenerator.TONE_DTMF_6);
101 builder.put("7", ToneGenerator.TONE_DTMF_7);
102 builder.put("8", ToneGenerator.TONE_DTMF_8);
103 builder.put("9", ToneGenerator.TONE_DTMF_9);
104 builder.put("*", ToneGenerator.TONE_DTMF_S);
105 builder.put("#", ToneGenerator.TONE_DTMF_P);
106 TONE_CODES = builder.build();
107 }
108
109 private static final int CAPTURING_RESOLUTION = 1920;
110 private static final int CAPTURING_MAX_FRAME_RATE = 30;
111
112 private final EventCallback eventCallback;
113 private final AtomicBoolean readyToReceivedIceCandidates = new AtomicBoolean(false);
114 private final Queue<IceCandidate> iceCandidates = new LinkedList<>();
115 private final AppRTCAudioManager.AudioManagerEvents audioManagerEvents = new AppRTCAudioManager.AudioManagerEvents() {
116 @Override
117 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
118 eventCallback.onAudioDeviceChanged(selectedAudioDevice, availableAudioDevices);
119 }
120 };
121 private final Handler mainHandler = new Handler(Looper.getMainLooper());
122 private VideoTrack localVideoTrack = null;
123 private VideoTrack remoteVideoTrack = null;
124 private final PeerConnection.Observer peerConnectionObserver = new PeerConnection.Observer() {
125 @Override
126 public void onSignalingChange(PeerConnection.SignalingState signalingState) {
127 Log.d(EXTENDED_LOGGING_TAG, "onSignalingChange(" + signalingState + ")");
128 //this is called after removeTrack or addTrack
129 //and should then trigger a content-add or content-remove or something
130 //https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/removeTrack
131 }
132
133 @Override
134 public void onConnectionChange(final PeerConnection.PeerConnectionState newState) {
135 eventCallback.onConnectionChange(newState);
136 }
137
138 @Override
139 public void onIceConnectionChange(PeerConnection.IceConnectionState iceConnectionState) {
140 Log.d(EXTENDED_LOGGING_TAG, "onIceConnectionChange(" + iceConnectionState + ")");
141 }
142
143 @Override
144 public void onSelectedCandidatePairChanged(CandidatePairChangeEvent event) {
145 Log.d(Config.LOGTAG, "remote candidate selected: " + event.remote);
146 Log.d(Config.LOGTAG, "local candidate selected: " + event.local);
147 }
148
149 @Override
150 public void onIceConnectionReceivingChange(boolean b) {
151
152 }
153
154 @Override
155 public void onIceGatheringChange(PeerConnection.IceGatheringState iceGatheringState) {
156 Log.d(EXTENDED_LOGGING_TAG, "onIceGatheringChange(" + iceGatheringState + ")");
157 }
158
159 @Override
160 public void onIceCandidate(IceCandidate iceCandidate) {
161 if (readyToReceivedIceCandidates.get()) {
162 eventCallback.onIceCandidate(iceCandidate);
163 } else {
164 iceCandidates.add(iceCandidate);
165 }
166 }
167
168 @Override
169 public void onIceCandidatesRemoved(IceCandidate[] iceCandidates) {
170
171 }
172
173 @Override
174 public void onAddStream(MediaStream mediaStream) {
175 Log.d(EXTENDED_LOGGING_TAG, "onAddStream(numAudioTracks=" + mediaStream.audioTracks.size() + ",numVideoTracks=" + mediaStream.videoTracks.size() + ")");
176 }
177
178 @Override
179 public void onRemoveStream(MediaStream mediaStream) {
180
181 }
182
183 @Override
184 public void onDataChannel(DataChannel dataChannel) {
185
186 }
187
188 @Override
189 public void onRenegotiationNeeded() {
190 Log.d(EXTENDED_LOGGING_TAG, "onRenegotiationNeeded()");
191 final PeerConnection.PeerConnectionState currentState = peerConnection == null ? null : peerConnection.connectionState();
192 if (currentState != null && currentState != PeerConnection.PeerConnectionState.NEW) {
193 eventCallback.onRenegotiationNeeded();
194 }
195 }
196
197 @Override
198 public void onAddTrack(RtpReceiver rtpReceiver, MediaStream[] mediaStreams) {
199 final MediaStreamTrack track = rtpReceiver.track();
200 Log.d(EXTENDED_LOGGING_TAG, "onAddTrack(kind=" + (track == null ? "null" : track.kind()) + ",numMediaStreams=" + mediaStreams.length + ")");
201 if (track instanceof VideoTrack) {
202 remoteVideoTrack = (VideoTrack) track;
203 }
204 }
205
206 @Override
207 public void onTrack(RtpTransceiver transceiver) {
208 Log.d(EXTENDED_LOGGING_TAG, "onTrack(mid=" + transceiver.getMid() + ",media=" + transceiver.getMediaType() + ")");
209 }
210 };
211 @Nullable
212 private PeerConnection peerConnection = null;
213 private AudioTrack localAudioTrack = null;
214 private AppRTCAudioManager appRTCAudioManager = null;
215 private ToneManager toneManager = null;
216 private Context context = null;
217 private EglBase eglBase = null;
218 private CapturerChoice capturerChoice;
219
220 WebRTCWrapper(final EventCallback eventCallback) {
221 this.eventCallback = eventCallback;
222 }
223
224 private static void dispose(final PeerConnection peerConnection) {
225 try {
226 peerConnection.dispose();
227 } catch (final IllegalStateException e) {
228 Log.e(Config.LOGTAG, "unable to dispose of peer connection", e);
229 }
230 }
231
232 @Nullable
233 private static CapturerChoice of(CameraEnumerator enumerator, final String deviceName, Set<String> availableCameras) {
234 final CameraVideoCapturer capturer = enumerator.createCapturer(deviceName, null);
235 if (capturer == null) {
236 return null;
237 }
238 final ArrayList<CameraEnumerationAndroid.CaptureFormat> choices = new ArrayList<>(enumerator.getSupportedFormats(deviceName));
239 Collections.sort(choices, (a, b) -> b.width - a.width);
240 for (final CameraEnumerationAndroid.CaptureFormat captureFormat : choices) {
241 if (captureFormat.width <= CAPTURING_RESOLUTION) {
242 return new CapturerChoice(capturer, captureFormat, availableCameras);
243 }
244 }
245 return null;
246 }
247
248 private static boolean isFrontFacing(final CameraEnumerator cameraEnumerator, final String deviceName) {
249 try {
250 return cameraEnumerator.isFrontFacing(deviceName);
251 } catch (final NullPointerException e) {
252 return false;
253 }
254 }
255
256 public void setup(final XmppConnectionService service, final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference) throws InitializationException {
257 try {
258 PeerConnectionFactory.initialize(
259 PeerConnectionFactory.InitializationOptions.builder(service)
260 .setFieldTrials("WebRTC-BindUsingInterfaceName/Enabled/")
261 .createInitializationOptions()
262 );
263 } catch (final UnsatisfiedLinkError e) {
264 throw new InitializationException("Unable to initialize PeerConnectionFactory", e);
265 }
266 try {
267 this.eglBase = EglBase.create();
268 } catch (final RuntimeException e) {
269 throw new InitializationException("Unable to create EGL base", e);
270 }
271 this.context = service;
272 this.toneManager = service.getJingleConnectionManager().toneManager;
273 mainHandler.post(() -> {
274 appRTCAudioManager = AppRTCAudioManager.create(service, speakerPhonePreference);
275 toneManager.setAppRtcAudioManagerHasControl(true);
276 appRTCAudioManager.start(audioManagerEvents);
277 eventCallback.onAudioDeviceChanged(appRTCAudioManager.getSelectedAudioDevice(), appRTCAudioManager.getAudioDevices());
278 });
279 }
280
281 synchronized void initializePeerConnection(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws InitializationException {
282 Preconditions.checkState(this.eglBase != null);
283 Preconditions.checkNotNull(media);
284 Preconditions.checkArgument(media.size() > 0, "media can not be empty when initializing peer connection");
285 final boolean setUseHardwareAcousticEchoCanceler = WebRtcAudioEffects.canUseAcousticEchoCanceler() && !HARDWARE_AEC_BLACKLIST.contains(Build.MODEL);
286 Log.d(Config.LOGTAG, String.format("setUseHardwareAcousticEchoCanceler(%s) model=%s", setUseHardwareAcousticEchoCanceler, Build.MODEL));
287 PeerConnectionFactory peerConnectionFactory = PeerConnectionFactory.builder()
288 .setVideoDecoderFactory(new DefaultVideoDecoderFactory(eglBase.getEglBaseContext()))
289 .setVideoEncoderFactory(new DefaultVideoEncoderFactory(eglBase.getEglBaseContext(), true, true))
290 .setAudioDeviceModule(JavaAudioDeviceModule.builder(context)
291 .setUseHardwareAcousticEchoCanceler(setUseHardwareAcousticEchoCanceler)
292 .createAudioDeviceModule()
293 )
294 .createPeerConnectionFactory();
295
296
297 final PeerConnection.RTCConfiguration rtcConfig = buildConfiguration(iceServers);
298 final PeerConnection peerConnection = peerConnectionFactory.createPeerConnection(rtcConfig, peerConnectionObserver);
299 if (peerConnection == null) {
300 throw new InitializationException("Unable to create PeerConnection");
301 }
302
303 final Optional<CapturerChoice> optionalCapturerChoice = media.contains(Media.VIDEO) ? getVideoCapturer() : Optional.absent();
304
305 if (optionalCapturerChoice.isPresent()) {
306 this.capturerChoice = optionalCapturerChoice.get();
307 final CameraVideoCapturer capturer = this.capturerChoice.cameraVideoCapturer;
308 final VideoSource videoSource = peerConnectionFactory.createVideoSource(false);
309 SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create("webrtc", eglBase.getEglBaseContext());
310 capturer.initialize(surfaceTextureHelper, requireContext(), videoSource.getCapturerObserver());
311 Log.d(Config.LOGTAG, String.format("start capturing at %dx%d@%d", capturerChoice.captureFormat.width, capturerChoice.captureFormat.height, capturerChoice.getFrameRate()));
312 capturer.startCapture(capturerChoice.captureFormat.width, capturerChoice.captureFormat.height, capturerChoice.getFrameRate());
313
314 this.localVideoTrack = peerConnectionFactory.createVideoTrack("my-video-track", videoSource);
315
316 peerConnection.addTrack(this.localVideoTrack);
317 }
318
319
320 if (media.contains(Media.AUDIO)) {
321 //set up audio track
322 final AudioSource audioSource = peerConnectionFactory.createAudioSource(new MediaConstraints());
323 this.localAudioTrack = peerConnectionFactory.createAudioTrack("my-audio-track", audioSource);
324 peerConnection.addTrack(this.localAudioTrack);
325 }
326 peerConnection.setAudioPlayout(true);
327 peerConnection.setAudioRecording(true);
328 this.peerConnection = peerConnection;
329 }
330
331 private static PeerConnection.RTCConfiguration buildConfiguration(final List<PeerConnection.IceServer> iceServers) {
332 final PeerConnection.RTCConfiguration rtcConfig = new PeerConnection.RTCConfiguration(iceServers);
333 rtcConfig.tcpCandidatePolicy = PeerConnection.TcpCandidatePolicy.DISABLED; //XEP-0176 doesn't support tcp
334 rtcConfig.continualGatheringPolicy = PeerConnection.ContinualGatheringPolicy.GATHER_CONTINUALLY;
335 rtcConfig.sdpSemantics = PeerConnection.SdpSemantics.UNIFIED_PLAN;
336 rtcConfig.rtcpMuxPolicy = PeerConnection.RtcpMuxPolicy.NEGOTIATE;
337 rtcConfig.enableImplicitRollback = true;
338 return rtcConfig;
339 }
340
341 void reconfigurePeerConnection(final List<PeerConnection.IceServer> iceServers) {
342 requirePeerConnection().setConfiguration(buildConfiguration(iceServers));
343 }
344
345 void restartIce() {
346 executorService.execute(() -> requirePeerConnection().restartIce());
347 }
348
349 public void setIsReadyToReceiveIceCandidates(final boolean ready) {
350 readyToReceivedIceCandidates.set(ready);
351 while (ready && iceCandidates.peek() != null) {
352 eventCallback.onIceCandidate(iceCandidates.poll());
353 }
354 }
355
356 synchronized void close() {
357 final PeerConnection peerConnection = this.peerConnection;
358 final CapturerChoice capturerChoice = this.capturerChoice;
359 final AppRTCAudioManager audioManager = this.appRTCAudioManager;
360 final EglBase eglBase = this.eglBase;
361 if (peerConnection != null) {
362 dispose(peerConnection);
363 this.peerConnection = null;
364 }
365 if (audioManager != null) {
366 toneManager.setAppRtcAudioManagerHasControl(false);
367 mainHandler.post(audioManager::stop);
368 }
369 this.localVideoTrack = null;
370 this.remoteVideoTrack = null;
371 if (capturerChoice != null) {
372 try {
373 capturerChoice.cameraVideoCapturer.stopCapture();
374 } catch (InterruptedException e) {
375 Log.e(Config.LOGTAG, "unable to stop capturing");
376 }
377 }
378 if (eglBase != null) {
379 eglBase.release();
380 this.eglBase = null;
381 }
382 }
383
384 synchronized void verifyClosed() {
385 if (this.peerConnection != null
386 || this.eglBase != null
387 || this.localVideoTrack != null
388 || this.remoteVideoTrack != null) {
389 final IllegalStateException e = new IllegalStateException("WebRTCWrapper hasn't been closed properly");
390 Log.e(Config.LOGTAG, "verifyClosed() failed. Going to throw", e);
391 throw e;
392 }
393 }
394
395 boolean isCameraSwitchable() {
396 final CapturerChoice capturerChoice = this.capturerChoice;
397 return capturerChoice != null && capturerChoice.availableCameras.size() > 1;
398 }
399
400 boolean isFrontCamera() {
401 final CapturerChoice capturerChoice = this.capturerChoice;
402 return capturerChoice == null || capturerChoice.isFrontCamera;
403 }
404
405 ListenableFuture<Boolean> switchCamera() {
406 final CapturerChoice capturerChoice = this.capturerChoice;
407 if (capturerChoice == null) {
408 return Futures.immediateFailedFuture(new IllegalStateException("CameraCapturer has not been initialized"));
409 }
410 final SettableFuture<Boolean> future = SettableFuture.create();
411 capturerChoice.cameraVideoCapturer.switchCamera(new CameraVideoCapturer.CameraSwitchHandler() {
412 @Override
413 public void onCameraSwitchDone(boolean isFrontCamera) {
414 capturerChoice.isFrontCamera = isFrontCamera;
415 future.set(isFrontCamera);
416 }
417
418 @Override
419 public void onCameraSwitchError(final String message) {
420 future.setException(new IllegalStateException(String.format("Unable to switch camera %s", message)));
421 }
422 });
423 return future;
424 }
425
426 boolean isMicrophoneEnabled() {
427 final AudioTrack audioTrack = this.localAudioTrack;
428 if (audioTrack == null) {
429 throw new IllegalStateException("Local audio track does not exist (yet)");
430 }
431 try {
432 return audioTrack.enabled();
433 } catch (final IllegalStateException e) {
434 //sometimes UI might still be rendering the buttons when a background thread has already ended the call
435 return false;
436 }
437 }
438
439 boolean setMicrophoneEnabled(final boolean enabled) {
440 final AudioTrack audioTrack = this.localAudioTrack;
441 if (audioTrack == null) {
442 throw new IllegalStateException("Local audio track does not exist (yet)");
443 }
444 try {
445 audioTrack.setEnabled(enabled);
446 return true;
447 } catch (final IllegalStateException e) {
448 Log.d(Config.LOGTAG, "unable to toggle microphone", e);
449 //ignoring race condition in case MediaStreamTrack has been disposed
450 return false;
451 }
452 }
453
454 boolean isVideoEnabled() {
455 final VideoTrack videoTrack = this.localVideoTrack;
456 if (videoTrack == null) {
457 return false;
458 }
459 return videoTrack.enabled();
460 }
461
462 void setVideoEnabled(final boolean enabled) {
463 final VideoTrack videoTrack = this.localVideoTrack;
464 if (videoTrack == null) {
465 throw new IllegalStateException("Local video track does not exist");
466 }
467 videoTrack.setEnabled(enabled);
468 }
469
470 synchronized ListenableFuture<SessionDescription> setLocalDescription() {
471 return Futures.transformAsync(getPeerConnectionFuture(), peerConnection -> {
472 final SettableFuture<SessionDescription> future = SettableFuture.create();
473 peerConnection.setLocalDescription(new SetSdpObserver() {
474 @Override
475 public void onSetSuccess() {
476 final SessionDescription description = peerConnection.getLocalDescription();
477 Log.d(EXTENDED_LOGGING_TAG, "set local description:");
478 logDescription(description);
479 future.set(description);
480 }
481
482 @Override
483 public void onSetFailure(final String message) {
484 future.setException(new FailureToSetDescriptionException(message));
485 }
486 });
487 return future;
488 }, MoreExecutors.directExecutor());
489 }
490
491 private static void logDescription(final SessionDescription sessionDescription) {
492 for (final String line : sessionDescription.description.split(eu.siacs.conversations.xmpp.jingle.SessionDescription.LINE_DIVIDER)) {
493 Log.d(EXTENDED_LOGGING_TAG, line);
494 }
495 }
496
497 synchronized ListenableFuture<Void> setRemoteDescription(final SessionDescription sessionDescription) {
498 Log.d(EXTENDED_LOGGING_TAG, "setting remote description:");
499 logDescription(sessionDescription);
500 return Futures.transformAsync(getPeerConnectionFuture(), peerConnection -> {
501 final SettableFuture<Void> future = SettableFuture.create();
502 peerConnection.setRemoteDescription(new SetSdpObserver() {
503 @Override
504 public void onSetSuccess() {
505 future.set(null);
506 }
507
508 @Override
509 public void onSetFailure(final String message) {
510 future.setException(new FailureToSetDescriptionException(message));
511 }
512 }, sessionDescription);
513 return future;
514 }, MoreExecutors.directExecutor());
515 }
516
517 @Nonnull
518 private ListenableFuture<PeerConnection> getPeerConnectionFuture() {
519 final PeerConnection peerConnection = this.peerConnection;
520 if (peerConnection == null) {
521 return Futures.immediateFailedFuture(new PeerConnectionNotInitialized());
522 } else {
523 return Futures.immediateFuture(peerConnection);
524 }
525 }
526
527 private PeerConnection requirePeerConnection() {
528 final PeerConnection peerConnection = this.peerConnection;
529 if (peerConnection == null) {
530 throw new PeerConnectionNotInitialized();
531 }
532 return peerConnection;
533 }
534
535 public boolean applyDtmfTone(String tone) {
536 if (toneManager == null || peerConnection == null || peerConnection.getSenders().isEmpty()) {
537 return false;
538 }
539 peerConnection.getSenders().get(0).dtmf().insertDtmf(tone, TONE_DURATION, 100);
540 toneManager.startTone(TONE_CODES.get(tone), TONE_DURATION);
541 return true;
542 }
543
544 void addIceCandidate(IceCandidate iceCandidate) {
545 requirePeerConnection().addIceCandidate(iceCandidate);
546 }
547
548 private Optional<CapturerChoice> getVideoCapturer() {
549 final CameraEnumerator enumerator = new Camera2Enumerator(requireContext());
550 final Set<String> deviceNames = ImmutableSet.copyOf(enumerator.getDeviceNames());
551 for (final String deviceName : deviceNames) {
552 if (isFrontFacing(enumerator, deviceName)) {
553 final CapturerChoice capturerChoice = of(enumerator, deviceName, deviceNames);
554 if (capturerChoice == null) {
555 return Optional.absent();
556 }
557 capturerChoice.isFrontCamera = true;
558 return Optional.of(capturerChoice);
559 }
560 }
561 if (deviceNames.size() == 0) {
562 return Optional.absent();
563 } else {
564 return Optional.fromNullable(of(enumerator, Iterables.get(deviceNames, 0), deviceNames));
565 }
566 }
567
568 PeerConnection.PeerConnectionState getState() {
569 return requirePeerConnection().connectionState();
570 }
571
572 public PeerConnection.SignalingState getSignalingState() {
573 return requirePeerConnection().signalingState();
574 }
575
576
577 EglBase.Context getEglBaseContext() {
578 return this.eglBase.getEglBaseContext();
579 }
580
581 Optional<VideoTrack> getLocalVideoTrack() {
582 return Optional.fromNullable(this.localVideoTrack);
583 }
584
585 Optional<VideoTrack> getRemoteVideoTrack() {
586 return Optional.fromNullable(this.remoteVideoTrack);
587 }
588
589 private Context requireContext() {
590 final Context context = this.context;
591 if (context == null) {
592 throw new IllegalStateException("call setup first");
593 }
594 return context;
595 }
596
597 AppRTCAudioManager getAudioManager() {
598 return appRTCAudioManager;
599 }
600
601 void execute(final Runnable command) {
602 executorService.execute(command);
603 }
604
605 public interface EventCallback {
606 void onIceCandidate(IceCandidate iceCandidate);
607
608 void onConnectionChange(PeerConnection.PeerConnectionState newState);
609
610 void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices);
611
612 void onRenegotiationNeeded();
613 }
614
615 private static abstract class SetSdpObserver implements SdpObserver {
616
617 @Override
618 public void onCreateSuccess(org.webrtc.SessionDescription sessionDescription) {
619 throw new IllegalStateException("Not able to use SetSdpObserver");
620 }
621
622 @Override
623 public void onCreateFailure(String s) {
624 throw new IllegalStateException("Not able to use SetSdpObserver");
625 }
626
627 }
628
629 private static abstract class CreateSdpObserver implements SdpObserver {
630
631
632 @Override
633 public void onSetSuccess() {
634 throw new IllegalStateException("Not able to use CreateSdpObserver");
635 }
636
637
638 @Override
639 public void onSetFailure(String s) {
640 throw new IllegalStateException("Not able to use CreateSdpObserver");
641 }
642 }
643
644 static class InitializationException extends Exception {
645
646 private InitializationException(final String message, final Throwable throwable) {
647 super(message, throwable);
648 }
649
650 private InitializationException(final String message) {
651 super(message);
652 }
653 }
654
655 public static class PeerConnectionNotInitialized extends IllegalStateException {
656
657 private PeerConnectionNotInitialized() {
658 super("initialize PeerConnection first");
659 }
660
661 }
662
663 private static class FailureToSetDescriptionException extends IllegalArgumentException {
664 public FailureToSetDescriptionException(String message) {
665 super(message);
666 }
667 }
668
669 private static class CapturerChoice {
670 private final CameraVideoCapturer cameraVideoCapturer;
671 private final CameraEnumerationAndroid.CaptureFormat captureFormat;
672 private final Set<String> availableCameras;
673 private boolean isFrontCamera = false;
674
675 CapturerChoice(CameraVideoCapturer cameraVideoCapturer, CameraEnumerationAndroid.CaptureFormat captureFormat, Set<String> cameras) {
676 this.cameraVideoCapturer = cameraVideoCapturer;
677 this.captureFormat = captureFormat;
678 this.availableCameras = cameras;
679 }
680
681 int getFrameRate() {
682 return Math.max(captureFormat.framerate.min, Math.min(CAPTURING_MAX_FRAME_RATE, captureFormat.framerate.max));
683 }
684 }
685}