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.util.concurrent.Futures;
12import com.google.common.util.concurrent.ListenableFuture;
13import com.google.common.util.concurrent.MoreExecutors;
14import com.google.common.util.concurrent.SettableFuture;
15
16import org.webrtc.AudioSource;
17import org.webrtc.AudioTrack;
18import org.webrtc.Camera1Enumerator;
19import org.webrtc.Camera2Enumerator;
20import org.webrtc.CameraEnumerationAndroid;
21import org.webrtc.CameraEnumerator;
22import org.webrtc.CameraVideoCapturer;
23import org.webrtc.CandidatePairChangeEvent;
24import org.webrtc.DataChannel;
25import org.webrtc.DefaultVideoDecoderFactory;
26import org.webrtc.DefaultVideoEncoderFactory;
27import org.webrtc.EglBase;
28import org.webrtc.IceCandidate;
29import org.webrtc.MediaConstraints;
30import org.webrtc.MediaStream;
31import org.webrtc.MediaStreamTrack;
32import org.webrtc.PeerConnection;
33import org.webrtc.PeerConnectionFactory;
34import org.webrtc.RtpReceiver;
35import org.webrtc.RtpTransceiver;
36import org.webrtc.SdpObserver;
37import org.webrtc.SessionDescription;
38import org.webrtc.SurfaceTextureHelper;
39import org.webrtc.VideoSource;
40import org.webrtc.VideoTrack;
41
42import java.util.ArrayList;
43import java.util.Collections;
44import java.util.List;
45import java.util.Set;
46
47import javax.annotation.Nonnull;
48import javax.annotation.Nullable;
49
50import eu.siacs.conversations.Config;
51import eu.siacs.conversations.services.AppRTCAudioManager;
52
53public class WebRTCWrapper {
54
55 private static final String EXTENDED_LOGGING_TAG = WebRTCWrapper.class.getSimpleName();
56
57 private static final int CAPTURING_RESOLUTION = 1920;
58 private static final int CAPTURING_MAX_FRAME_RATE = 30;
59
60 private final EventCallback eventCallback;
61 private final AppRTCAudioManager.AudioManagerEvents audioManagerEvents = new AppRTCAudioManager.AudioManagerEvents() {
62 @Override
63 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
64 eventCallback.onAudioDeviceChanged(selectedAudioDevice, availableAudioDevices);
65 }
66 };
67 private final Handler mainHandler = new Handler(Looper.getMainLooper());
68 private VideoTrack localVideoTrack = null;
69 private VideoTrack remoteVideoTrack = null;
70 private final PeerConnection.Observer peerConnectionObserver = new PeerConnection.Observer() {
71 @Override
72 public void onSignalingChange(PeerConnection.SignalingState signalingState) {
73 Log.d(EXTENDED_LOGGING_TAG, "onSignalingChange(" + signalingState + ")");
74 //this is called after removeTrack or addTrack
75 //and should then trigger a content-add or content-remove or something
76 //https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/removeTrack
77 }
78
79 @Override
80 public void onConnectionChange(PeerConnection.PeerConnectionState newState) {
81 eventCallback.onConnectionChange(newState);
82 }
83
84 @Override
85 public void onIceConnectionChange(PeerConnection.IceConnectionState iceConnectionState) {
86
87 }
88
89 @Override
90 public void onSelectedCandidatePairChanged(CandidatePairChangeEvent event) {
91 Log.d(Config.LOGTAG, "remote candidate selected: " + event.remote);
92 Log.d(Config.LOGTAG, "local candidate selected: " + event.local);
93 }
94
95 @Override
96 public void onIceConnectionReceivingChange(boolean b) {
97
98 }
99
100 @Override
101 public void onIceGatheringChange(PeerConnection.IceGatheringState iceGatheringState) {
102 Log.d(EXTENDED_LOGGING_TAG, "onIceGatheringChange(" + iceGatheringState + ")");
103 }
104
105 @Override
106 public void onIceCandidate(IceCandidate iceCandidate) {
107 eventCallback.onIceCandidate(iceCandidate);
108 }
109
110 @Override
111 public void onIceCandidatesRemoved(IceCandidate[] iceCandidates) {
112
113 }
114
115 @Override
116 public void onAddStream(MediaStream mediaStream) {
117 Log.d(EXTENDED_LOGGING_TAG, "onAddStream(numAudioTracks=" + mediaStream.audioTracks.size() + ",numVideoTracks=" + mediaStream.videoTracks.size() + ")");
118 final List<VideoTrack> videoTracks = mediaStream.videoTracks;
119 if (videoTracks.size() > 0) {
120 remoteVideoTrack = videoTracks.get(0);
121 Log.d(Config.LOGTAG, "remote video track enabled?=" + remoteVideoTrack.enabled());
122 } else {
123 Log.d(Config.LOGTAG, "no remote video tracks found");
124 }
125 }
126
127 @Override
128 public void onRemoveStream(MediaStream mediaStream) {
129
130 }
131
132 @Override
133 public void onDataChannel(DataChannel dataChannel) {
134
135 }
136
137 @Override
138 public void onRenegotiationNeeded() {
139
140 }
141
142 @Override
143 public void onAddTrack(RtpReceiver rtpReceiver, MediaStream[] mediaStreams) {
144 final MediaStreamTrack track = rtpReceiver.track();
145 Log.d(EXTENDED_LOGGING_TAG, "onAddTrack(kind=" + (track == null ? "null" : track.kind()) + ",numMediaStreams=" + mediaStreams.length + ")");
146 }
147
148 @Override
149 public void onTrack(RtpTransceiver transceiver) {
150 Log.d(EXTENDED_LOGGING_TAG, "onTrack(mid=" + transceiver.getMid() + ",media=" + transceiver.getMediaType() + ")");
151 }
152 };
153 @Nullable
154 private PeerConnection peerConnection = null;
155 private AudioTrack localAudioTrack = null;
156 private AppRTCAudioManager appRTCAudioManager = null;
157 private Context context = null;
158 private EglBase eglBase = null;
159 private CapturerChoice capturerChoice;
160
161 WebRTCWrapper(final EventCallback eventCallback) {
162 this.eventCallback = eventCallback;
163 }
164
165 public void setup(final Context context, final AppRTCAudioManager.SpeakerPhonePreference speakerPhonePreference) {
166 PeerConnectionFactory.initialize(
167 PeerConnectionFactory.InitializationOptions.builder(context).createInitializationOptions()
168 );
169 this.eglBase = EglBase.create();
170 this.context = context;
171 mainHandler.post(() -> {
172 appRTCAudioManager = AppRTCAudioManager.create(context, speakerPhonePreference);
173 appRTCAudioManager.start(audioManagerEvents);
174 eventCallback.onAudioDeviceChanged(appRTCAudioManager.getSelectedAudioDevice(), appRTCAudioManager.getAudioDevices());
175 });
176 }
177
178 synchronized void initializePeerConnection(final Set<Media> media, final List<PeerConnection.IceServer> iceServers) throws InitializationException {
179 Preconditions.checkState(this.eglBase != null);
180 Preconditions.checkNotNull(media);
181 Preconditions.checkArgument(media.size() > 0, "media can not be empty when initializing peer connection");
182 PeerConnectionFactory peerConnectionFactory = PeerConnectionFactory.builder()
183 .setVideoDecoderFactory(new DefaultVideoDecoderFactory(eglBase.getEglBaseContext()))
184 .setVideoEncoderFactory(new DefaultVideoEncoderFactory(eglBase.getEglBaseContext(), true, true))
185 .createPeerConnectionFactory();
186
187
188 final MediaStream stream = peerConnectionFactory.createLocalMediaStream("my-media-stream");
189
190 final Optional<CapturerChoice> optionalCapturerChoice = media.contains(Media.VIDEO) ? getVideoCapturer() : Optional.absent();
191
192 if (optionalCapturerChoice.isPresent()) {
193 this.capturerChoice = optionalCapturerChoice.get();
194 final CameraVideoCapturer capturer = this.capturerChoice.cameraVideoCapturer;
195 final VideoSource videoSource = peerConnectionFactory.createVideoSource(false);
196 SurfaceTextureHelper surfaceTextureHelper = SurfaceTextureHelper.create("webrtc", eglBase.getEglBaseContext());
197 capturer.initialize(surfaceTextureHelper, requireContext(), videoSource.getCapturerObserver());
198 Log.d(Config.LOGTAG, String.format("start capturing at %dx%d@%d", capturerChoice.captureFormat.width, capturerChoice.captureFormat.height, capturerChoice.getFrameRate()));
199 capturer.startCapture(capturerChoice.captureFormat.width, capturerChoice.captureFormat.height, capturerChoice.getFrameRate());
200
201 this.localVideoTrack = peerConnectionFactory.createVideoTrack("my-video-track", videoSource);
202
203 stream.addTrack(this.localVideoTrack);
204 }
205
206
207 if (media.contains(Media.AUDIO)) {
208 //set up audio track
209 final AudioSource audioSource = peerConnectionFactory.createAudioSource(new MediaConstraints());
210 this.localAudioTrack = peerConnectionFactory.createAudioTrack("my-audio-track", audioSource);
211 stream.addTrack(this.localAudioTrack);
212 }
213
214
215 final PeerConnection.RTCConfiguration rtcConfig = new PeerConnection.RTCConfiguration(iceServers);
216 rtcConfig.tcpCandidatePolicy = PeerConnection.TcpCandidatePolicy.DISABLED; //XEP-0176 doesn't support tcp
217 final PeerConnection peerConnection = peerConnectionFactory.createPeerConnection(rtcConfig, peerConnectionObserver);
218 if (peerConnection == null) {
219 throw new InitializationException("Unable to create PeerConnection");
220 }
221 peerConnection.addStream(stream);
222 peerConnection.setAudioPlayout(true);
223 peerConnection.setAudioRecording(true);
224 this.peerConnection = peerConnection;
225 }
226
227 synchronized void close() {
228 final PeerConnection peerConnection = this.peerConnection;
229 final CapturerChoice capturerChoice = this.capturerChoice;
230 final AppRTCAudioManager audioManager = this.appRTCAudioManager;
231 final EglBase eglBase = this.eglBase;
232 if (peerConnection != null) {
233 dispose(peerConnection);
234 this.peerConnection = null;
235 }
236 if (audioManager != null) {
237 mainHandler.post(audioManager::stop);
238 }
239 this.localVideoTrack = null;
240 this.remoteVideoTrack = null;
241 if (capturerChoice != null) {
242 try {
243 capturerChoice.cameraVideoCapturer.stopCapture();
244 } catch (InterruptedException e) {
245 Log.e(Config.LOGTAG, "unable to stop capturing");
246 }
247 }
248 if (eglBase != null) {
249 eglBase.release();
250 this.eglBase = null;
251 }
252 }
253
254 private static void dispose(final PeerConnection peerConnection) {
255 try {
256 peerConnection.dispose();
257 } catch (final IllegalStateException e) {
258 Log.e(Config.LOGTAG,"unable to dispose of peer connection", e);
259 }
260 }
261
262 synchronized void verifyClosed() {
263 if (this.peerConnection != null
264 || this.eglBase != null
265 || this.localVideoTrack != null
266 || this.remoteVideoTrack != null) {
267 final IllegalStateException e = new IllegalStateException("WebRTCWrapper hasn't been closed properly");
268 Log.e(Config.LOGTAG, "verifyClosed() failed. Going to throw", e);
269 throw e;
270 }
271 }
272
273 boolean isMicrophoneEnabled() {
274 final AudioTrack audioTrack = this.localAudioTrack;
275 if (audioTrack == null) {
276 throw new IllegalStateException("Local audio track does not exist (yet)");
277 }
278 return audioTrack.enabled();
279 }
280
281 void setMicrophoneEnabled(final boolean enabled) {
282 final AudioTrack audioTrack = this.localAudioTrack;
283 if (audioTrack == null) {
284 throw new IllegalStateException("Local audio track does not exist (yet)");
285 }
286 audioTrack.setEnabled(enabled);
287 }
288
289 boolean isVideoEnabled() {
290 final VideoTrack videoTrack = this.localVideoTrack;
291 if (videoTrack == null) {
292 throw new IllegalStateException("Local video track does not exist");
293 }
294 return videoTrack.enabled();
295 }
296
297 void setVideoEnabled(final boolean enabled) {
298 final VideoTrack videoTrack = this.localVideoTrack;
299 if (videoTrack == null) {
300 throw new IllegalStateException("Local video track does not exist");
301 }
302 videoTrack.setEnabled(enabled);
303 }
304
305 ListenableFuture<SessionDescription> createOffer() {
306 return Futures.transformAsync(getPeerConnectionFuture(), peerConnection -> {
307 final SettableFuture<SessionDescription> future = SettableFuture.create();
308 peerConnection.createOffer(new CreateSdpObserver() {
309 @Override
310 public void onCreateSuccess(SessionDescription sessionDescription) {
311 future.set(sessionDescription);
312 }
313
314 @Override
315 public void onCreateFailure(String s) {
316 future.setException(new IllegalStateException("Unable to create offer: " + s));
317 }
318 }, new MediaConstraints());
319 return future;
320 }, MoreExecutors.directExecutor());
321 }
322
323 ListenableFuture<SessionDescription> createAnswer() {
324 return Futures.transformAsync(getPeerConnectionFuture(), peerConnection -> {
325 final SettableFuture<SessionDescription> future = SettableFuture.create();
326 peerConnection.createAnswer(new CreateSdpObserver() {
327 @Override
328 public void onCreateSuccess(SessionDescription sessionDescription) {
329 future.set(sessionDescription);
330 }
331
332 @Override
333 public void onCreateFailure(String s) {
334 future.setException(new IllegalStateException("Unable to create answer: " + s));
335 }
336 }, new MediaConstraints());
337 return future;
338 }, MoreExecutors.directExecutor());
339 }
340
341 ListenableFuture<Void> setLocalDescription(final SessionDescription sessionDescription) {
342 Log.d(EXTENDED_LOGGING_TAG, "setting local description:");
343 for (final String line : sessionDescription.description.split(eu.siacs.conversations.xmpp.jingle.SessionDescription.LINE_DIVIDER)) {
344 Log.d(EXTENDED_LOGGING_TAG, line);
345 }
346 return Futures.transformAsync(getPeerConnectionFuture(), peerConnection -> {
347 final SettableFuture<Void> future = SettableFuture.create();
348 peerConnection.setLocalDescription(new SetSdpObserver() {
349 @Override
350 public void onSetSuccess() {
351 future.set(null);
352 }
353
354 @Override
355 public void onSetFailure(final String s) {
356 future.setException(new IllegalArgumentException("unable to set local session description: " + s));
357
358 }
359 }, sessionDescription);
360 return future;
361 }, MoreExecutors.directExecutor());
362 }
363
364 ListenableFuture<Void> setRemoteDescription(final SessionDescription sessionDescription) {
365 Log.d(EXTENDED_LOGGING_TAG, "setting remote description:");
366 for (final String line : sessionDescription.description.split(eu.siacs.conversations.xmpp.jingle.SessionDescription.LINE_DIVIDER)) {
367 Log.d(EXTENDED_LOGGING_TAG, line);
368 }
369 return Futures.transformAsync(getPeerConnectionFuture(), peerConnection -> {
370 final SettableFuture<Void> future = SettableFuture.create();
371 peerConnection.setRemoteDescription(new SetSdpObserver() {
372 @Override
373 public void onSetSuccess() {
374 future.set(null);
375 }
376
377 @Override
378 public void onSetFailure(String s) {
379 future.setException(new IllegalArgumentException("unable to set remote session description: " + s));
380
381 }
382 }, sessionDescription);
383 return future;
384 }, MoreExecutors.directExecutor());
385 }
386
387 @Nonnull
388 private ListenableFuture<PeerConnection> getPeerConnectionFuture() {
389 final PeerConnection peerConnection = this.peerConnection;
390 if (peerConnection == null) {
391 return Futures.immediateFailedFuture(new IllegalStateException("initialize PeerConnection first"));
392 } else {
393 return Futures.immediateFuture(peerConnection);
394 }
395 }
396
397 void addIceCandidate(IceCandidate iceCandidate) {
398 requirePeerConnection().addIceCandidate(iceCandidate);
399 }
400
401 private CameraEnumerator getCameraEnumerator() {
402 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
403 return new Camera2Enumerator(requireContext());
404 } else {
405 return new Camera1Enumerator();
406 }
407 }
408
409 private Optional<CapturerChoice> getVideoCapturer() {
410 final CameraEnumerator enumerator = getCameraEnumerator();
411 final String[] deviceNames = enumerator.getDeviceNames();
412 for (final String deviceName : deviceNames) {
413 if (enumerator.isFrontFacing(deviceName)) {
414 return Optional.fromNullable(of(enumerator, deviceName));
415 }
416 }
417 if (deviceNames.length == 0) {
418 return Optional.absent();
419 } else {
420 return Optional.fromNullable(of(enumerator, deviceNames[0]));
421 }
422 }
423
424 @Nullable
425 private static CapturerChoice of(CameraEnumerator enumerator, final String deviceName) {
426 final CameraVideoCapturer capturer = enumerator.createCapturer(deviceName, null);
427 if (capturer == null) {
428 return null;
429 }
430 final ArrayList<CameraEnumerationAndroid.CaptureFormat> choices = new ArrayList<>(enumerator.getSupportedFormats(deviceName));
431 Collections.sort(choices, (a, b) -> b.width - a.width);
432 for (final CameraEnumerationAndroid.CaptureFormat captureFormat : choices) {
433 if (captureFormat.width <= CAPTURING_RESOLUTION) {
434 return new CapturerChoice(capturer, captureFormat);
435 }
436 }
437 return null;
438 }
439
440 public PeerConnection.PeerConnectionState getState() {
441 return requirePeerConnection().connectionState();
442 }
443
444 EglBase.Context getEglBaseContext() {
445 return this.eglBase.getEglBaseContext();
446 }
447
448 Optional<VideoTrack> getLocalVideoTrack() {
449 return Optional.fromNullable(this.localVideoTrack);
450 }
451
452 Optional<VideoTrack> getRemoteVideoTrack() {
453 return Optional.fromNullable(this.remoteVideoTrack);
454 }
455
456 private PeerConnection requirePeerConnection() {
457 final PeerConnection peerConnection = this.peerConnection;
458 if (peerConnection == null) {
459 throw new IllegalStateException("initialize PeerConnection first");
460 }
461 return peerConnection;
462 }
463
464 private Context requireContext() {
465 final Context context = this.context;
466 if (context == null) {
467 throw new IllegalStateException("call setup first");
468 }
469 return context;
470 }
471
472 AppRTCAudioManager getAudioManager() {
473 return appRTCAudioManager;
474 }
475
476 public interface EventCallback {
477 void onIceCandidate(IceCandidate iceCandidate);
478
479 void onConnectionChange(PeerConnection.PeerConnectionState newState);
480
481 void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices);
482 }
483
484 private static abstract class SetSdpObserver implements SdpObserver {
485
486 @Override
487 public void onCreateSuccess(org.webrtc.SessionDescription sessionDescription) {
488 throw new IllegalStateException("Not able to use SetSdpObserver");
489 }
490
491 @Override
492 public void onCreateFailure(String s) {
493 throw new IllegalStateException("Not able to use SetSdpObserver");
494 }
495
496 }
497
498 private static abstract class CreateSdpObserver implements SdpObserver {
499
500
501 @Override
502 public void onSetSuccess() {
503 throw new IllegalStateException("Not able to use CreateSdpObserver");
504 }
505
506
507 @Override
508 public void onSetFailure(String s) {
509 throw new IllegalStateException("Not able to use CreateSdpObserver");
510 }
511 }
512
513 static class InitializationException extends Exception {
514
515 private InitializationException(String message) {
516 super(message);
517 }
518 }
519
520 private static class CapturerChoice {
521 private final CameraVideoCapturer cameraVideoCapturer;
522 private final CameraEnumerationAndroid.CaptureFormat captureFormat;
523
524 CapturerChoice(CameraVideoCapturer cameraVideoCapturer, CameraEnumerationAndroid.CaptureFormat captureFormat) {
525 this.cameraVideoCapturer = cameraVideoCapturer;
526 this.captureFormat = captureFormat;
527 }
528
529 int getFrameRate() {
530 return Math.max(captureFormat.framerate.min, Math.min(CAPTURING_MAX_FRAME_RATE, captureFormat.framerate.max));
531 }
532 }
533}