Cleanup unused code.

vector/src/main/java/im/vector/riotx/features/call/VectorCallActivity.kt

@@ -31,6 +31,7 @@ import android.view.WindowManager
 import butterknife.BindView
 import com.airbnb.mvrx.MvRx
 import com.airbnb.mvrx.viewModel
+import im.vector.matrix.android.api.extensions.tryThis
 import im.vector.matrix.android.api.session.call.EglUtils
 import im.vector.matrix.android.api.session.call.MxCallDetail
 import im.vector.riotx.R
@@ -41,16 +42,11 @@ import im.vector.riotx.core.utils.allGranted
 import im.vector.riotx.core.utils.checkPermissions
 import im.vector.riotx.features.call.service.CallHeadsUpService
 import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.subjects.PublishSubject
 import kotlinx.android.parcel.Parcelize
 import kotlinx.android.synthetic.main.activity_call.*
 import org.webrtc.EglBase
-import org.webrtc.IceCandidate
-import org.webrtc.MediaStream
 import org.webrtc.RendererCommon
-import org.webrtc.SessionDescription
 import org.webrtc.SurfaceViewRenderer
-import org.webrtc.VideoTrack
 import javax.inject.Inject
 
 @Parcelize
@@ -61,7 +57,7 @@ data class CallArgs(
         val isVideoCall: Boolean
 ) : Parcelable
 
-class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Listener {
+class VectorCallActivity : VectorBaseActivity() {
 
     override fun getLayoutRes() = R.layout.activity_call
 
@@ -85,14 +81,6 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
 
     private var rootEglBase: EglBase? = null
 
-//    private var peerConnectionFactory: PeerConnectionFactory? = null
-
-    // private var peerConnection: PeerConnection? = null
-
-//    private var remoteVideoTrack: VideoTrack? = null
-
-    private val iceCandidateSource: PublishSubject<IceCandidate> = PublishSubject.create()
-
     var callHeadsUpService: CallHeadsUpService? = null
     private val serviceConnection = object : ServiceConnection {
         override fun onServiceDisconnected(name: ComponentName?) {
@@ -129,6 +117,7 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
+        tryThis { unbindService(serviceConnection) }
         bindService(Intent(this, CallHeadsUpService::class.java), serviceConnection, 0)
 
         if (intent.hasExtra(MvRx.KEY_ARG)) {
@@ -153,15 +142,10 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
                     handleViewEvents(it)
                 }
                 .disposeOnDestroy()
-//
-//        if (isFirstCreation()) {
-//
-//        }
 
         if (checkPermissions(PERMISSIONS_FOR_VIDEO_IP_CALL, this, CAPTURE_PERMISSION_REQUEST_CODE, R.string.permissions_rationale_msg_camera_and_audio)) {
             start()
         }
-        peerConnectionManager.listener = this
     }
 
     override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
@@ -185,165 +169,7 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
         pipRenderer.setZOrderMediaOverlay(true)
         pipRenderer.setEnableHardwareScaler(true /* enabled */)
         fullscreenRenderer.setEnableHardwareScaler(true /* enabled */)
-        // Start with local feed in fullscreen and swap it to the pip when the call is connected.
-        // setSwappedFeeds(true /* isSwappedFeeds */);
 
-        if (isFirstCreation()) {
-            //peerConnectionManager.createPeerConnectionFactory()
-
-            /*
-            val cameraIterator = if (Camera2Enumerator.isSupported(this)) Camera2Enumerator(this) else Camera1Enumerator(false)
-            val frontCamera = cameraIterator.deviceNames
-                    ?.firstOrNull { cameraIterator.isFrontFacing(it) }
-                    ?: cameraIterator.deviceNames?.first()
-                    ?: return true
-            val videoCapturer = cameraIterator.createCapturer(frontCamera, null)
-
-
-
-            peerConnectionManager.createPeerConnection(videoCapturer, iceServers)
-             */
-
-            //peerConnectionManager.startCall()
-        }
-//        PeerConnectionFactory.initialize(PeerConnectionFactory
-//                .InitializationOptions.builder(applicationContext)
-//                .createInitializationOptions()
-//        )
-
-//        val options = PeerConnectionFactory.Options()
-//        val defaultVideoEncoderFactory = DefaultVideoEncoderFactory(
-//                rootEglBase!!.eglBaseContext,  /* enableIntelVp8Encoder */
-//                true,  /* enableH264HighProfile */
-//                true)
-//        val defaultVideoDecoderFactory = DefaultVideoDecoderFactory(rootEglBase!!.eglBaseContext)
-//
-//        peerConnectionFactory = PeerConnectionFactory.builder()
-//                .setOptions(options)
-//                .setVideoEncoderFactory(defaultVideoEncoderFactory)
-//                .setVideoDecoderFactory(defaultVideoDecoderFactory)
-//                .createPeerConnectionFactory()
-
-//        val cameraIterator = if (Camera2Enumerator.isSupported(this)) Camera2Enumerator(this) else Camera1Enumerator(false)
-//        val frontCamera = cameraIterator.deviceNames
-//                ?.firstOrNull { cameraIterator.isFrontFacing(it) }
-//                ?: cameraIterator.deviceNames?.first()
-//                ?: return true
-//        val videoCapturer = cameraIterator.createCapturer(frontCamera, null)
-//
-//        // Following instruction here: https://stackoverflow.com/questions/55085726/webrtc-create-peerconnectionfactory-object
-//        val surfaceTextureHelper = SurfaceTextureHelper.create("CaptureThread", rootEglBase!!.eglBaseContext)
-//
-//        val videoSource = peerConnectionFactory?.createVideoSource(videoCapturer.isScreencast)
-//        videoCapturer.initialize(surfaceTextureHelper, this, videoSource!!.capturerObserver)
-//        videoCapturer.startCapture(1280, 720, 30)
-//
-//
-//        val localVideoTrack = peerConnectionFactory?.createVideoTrack("ARDAMSv0", videoSource)
-//
-//        // create a local audio track
-//        val audioSource = peerConnectionFactory?.createAudioSource(DEFAULT_AUDIO_CONSTRAINTS)
-//        val audioTrack = peerConnectionFactory?.createAudioTrack("ARDAMSa0", audioSource)
-
-        pipRenderer.setMirror(true)
-//        localVideoTrack?.addSink(pipRenderer)
-
-        /*
-                {
-                "username": "1586847781:@valere35:matrix.org",
-                 "password": "ZzbqbqfT9O2G3WpCpesdts2lyns=",
-                  "ttl": 86400.0,
-                   "uris": ["turn:turn.matrix.org:3478?transport=udp", "turn:turn.matrix.org:3478?transport=tcp", "turns:turn.matrix.org:443?transport=tcp"]
-                   }
-         */
-
-//        val iceServers = ArrayList<PeerConnection.IceServer>().apply {
-//            listOf("turn:turn.matrix.org:3478?transport=udp", "turn:turn.matrix.org:3478?transport=tcp", "turns:turn.matrix.org:443?transport=tcp").forEach {
-//                add(
-//                        PeerConnection.IceServer.builder(it)
-//                                .setUsername("1586847781:@valere35:matrix.org")
-//                                .setPassword("ZzbqbqfT9O2G3WpCpesdts2lyns=")
-//                                .createIceServer()
-//                )
-//            }
-//        }
-//
-//        val iceCandidateSource: PublishSubject<IceCandidate> = PublishSubject.create()
-//
-//        iceCandidateSource
-//                .buffer(400, TimeUnit.MILLISECONDS)
-//                .subscribe {
-//                    // omit empty :/
-//                    if (it.isNotEmpty()) {
-//                        callViewModel.handle(VectorCallViewActions.AddLocalIceCandidate(it))
-//                    }
-//                }
-//                .disposeOnDestroy()
-//
-//        peerConnection = peerConnectionFactory?.createPeerConnection(
-//                iceServers,
-//                object : PeerConnectionObserverAdapter() {
-//                    override fun onIceCandidate(p0: IceCandidate?) {
-//                        p0?.let {
-//                            iceCandidateSource.onNext(it)
-//                        }
-//                    }
-//
-//                    override fun onAddStream(mediaStream: MediaStream?) {
-//                        runOnUiThread {
-//                            mediaStream?.videoTracks?.firstOrNull()?.let { videoTrack ->
-//                                remoteVideoTrack = videoTrack
-//                                remoteVideoTrack?.setEnabled(true)
-//                                remoteVideoTrack?.addSink(fullscreenRenderer)
-//                            }
-//                        }
-//                    }
-//
-//                    override fun onRemoveStream(mediaStream: MediaStream?) {
-//                        remoteVideoTrack = null
-//                    }
-//
-//                    override fun onIceConnectionChange(p0: PeerConnection.IceConnectionState?) {
-//                        if (p0 == PeerConnection.IceConnectionState.DISCONNECTED) {
-//                            // TODO prompt something?
-//                            finish()
-//                        }
-//                    }
-//                }
-//        )
-//
-//        val localMediaStream = peerConnectionFactory?.createLocalMediaStream("ARDAMS") // magic value?
-//        localMediaStream?.addTrack(localVideoTrack)
-//        localMediaStream?.addTrack(audioTrack)
-//
-//        val constraints = MediaConstraints()
-//        constraints.mandatory.add(MediaConstraints.KeyValuePair("OfferToReceiveAudio", "true"))
-//        constraints.mandatory.add(MediaConstraints.KeyValuePair("OfferToReceiveVideo", "true"))
-//
-//        peerConnection?.addStream(localMediaStream)
-//
-//        peerConnection?.createOffer(object : SdpObserver {
-//            override fun onSetFailure(p0: String?) {
-//                Timber.v("## VOIP onSetFailure $p0")
-//            }
-//
-//            override fun onSetSuccess() {
-//                Timber.v("## VOIP onSetSuccess")
-//            }
-//
-//            override fun onCreateSuccess(sessionDescription: SessionDescription) {
-//                Timber.v("## VOIP onCreateSuccess $sessionDescription")
-//                peerConnection?.setLocalDescription(object : SdpObserverAdapter() {
-//                    override fun onSetSuccess() {
-//                        callViewModel.handle(VectorCallViewActions.SendOffer(sessionDescription))
-//                    }
-//                }, sessionDescription)
-//            }
-//
-//            override fun onCreateFailure(p0: String?) {
-//                Timber.v("## VOIP onCreateFailure $p0")
-//            }
-//        }, constraints)
 
         peerConnectionManager.attachViewRenderers(pipRenderer, fullscreenRenderer)
         return false
@@ -351,16 +177,13 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
 
     override fun onDestroy() {
         peerConnectionManager.detachRenderers()
-        peerConnectionManager.listener = this
+        tryThis { unbindService(serviceConnection) }
         super.onDestroy()
     }
 
     private fun handleViewEvents(event: VectorCallViewEvents?) {
         when (event) {
             is VectorCallViewEvents.CallAnswered -> {
-                //val sdp = SessionDescription(SessionDescription.Type.ANSWER, event.content.answer.sdp)
-                //peerConnectionManager.answerReceived("", sdp)
-//                peerConnection?.setRemoteDescription(object : SdpObserverAdapter() {}, sdp)
             }
             is VectorCallViewEvents.CallHangup   -> {
                 finish()
@@ -368,53 +191,10 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
         }
     }
 
-//    @TargetApi(17)
-//    private fun getDisplayMetrics(): DisplayMetrics? {
-//        val displayMetrics = DisplayMetrics()
-//        val windowManager = application.getSystemService(Context.WINDOW_SERVICE) as WindowManager
-//        windowManager.defaultDisplay.getRealMetrics(displayMetrics)
-//        return displayMetrics
-//    }
-
-//    @TargetApi(21)
-//    private fun startScreenCapture() {
-//        val mediaProjectionManager: MediaProjectionManager = application.getSystemService(
-//                Context.MEDIA_PROJECTION_SERVICE) as MediaProjectionManager
-//        startActivityForResult(
-//                mediaProjectionManager.createScreenCaptureIntent(), CAPTURE_PERMISSION_REQUEST_CODE)
-//    }
-//
-//    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-//        if (requestCode != CAPTURE_PERMISSION_REQUEST_CODE) {
-//            super.onActivityResult(requestCode, resultCode, data)
-//        }
-// //        mediaProjectionPermissionResultCode = resultCode;
-// //        mediaProjectionPermissionResultData = data;
-// //        startCall();
-//    }
-
     companion object {
 
         private const val CAPTURE_PERMISSION_REQUEST_CODE = 1
 
-//        private val DEFAULT_AUDIO_CONSTRAINTS = MediaConstraints().apply {
-//            // add all existing audio filters to avoid having echos
-//            mandatory.add(MediaConstraints.KeyValuePair("googEchoCancellation", "true"))
-//            mandatory.add(MediaConstraints.KeyValuePair("googEchoCancellation2", "true"))
-//            mandatory.add(MediaConstraints.KeyValuePair("googDAEchoCancellation", "true"))
-//
-//            mandatory.add(MediaConstraints.KeyValuePair("googTypingNoiseDetection", "true"))
-//
-//            mandatory.add(MediaConstraints.KeyValuePair("googAutoGainControl", "true"))
-//            mandatory.add(MediaConstraints.KeyValuePair("googAutoGainControl2", "true"))
-//
-//            mandatory.add(MediaConstraints.KeyValuePair("googNoiseSuppression", "true"))
-//            mandatory.add(MediaConstraints.KeyValuePair("googNoiseSuppression2", "true"))
-//
-//            mandatory.add(MediaConstraints.KeyValuePair("googAudioMirroring", "false"))
-//            mandatory.add(MediaConstraints.KeyValuePair("googHighpassFilter", "true"))
-//        }
-
         fun newIntent(context: Context, mxCall: MxCallDetail): Intent {
             return Intent(context, VectorCallActivity::class.java).apply {
                 flags = Intent.FLAG_ACTIVITY_NEW_TASK
@@ -422,30 +202,4 @@ class VectorCallActivity : VectorBaseActivity(), WebRtcPeerConnectionManager.Lis
             }
         }
     }
-
-    override fun addLocalIceCandidate(candidates: IceCandidate) {
-        iceCandidateSource.onNext(candidates)
-    }
-
-    override fun addRemoteVideoTrack(videoTrack: VideoTrack) {
-        runOnUiThread {
-            videoTrack.setEnabled(true)
-            videoTrack.addSink(fullscreenRenderer)
-        }
-    }
-
-    override fun addLocalVideoTrack(videoTrack: VideoTrack) {
-        runOnUiThread {
-            videoTrack.addSink(pipRenderer)
-        }
-    }
-
-    override fun removeRemoteVideoStream(mediaStream: MediaStream) {
-    }
-
-    override fun onDisconnect() {
-    }
-
-    override fun sendOffer(sessionDescription: SessionDescription) {
-    }
 }

vector/src/main/java/im/vector/riotx/features/call/WebRtcPeerConnectionManager.kt

@@ -69,19 +69,8 @@ class WebRtcPeerConnectionManager @Inject constructor(
         private val sessionHolder: ActiveSessionHolder
 ) : CallsListener {
 
-    interface Listener {
-        fun addLocalIceCandidate(candidates: IceCandidate)
-        fun addRemoteVideoTrack(videoTrack: VideoTrack)
-        fun addLocalVideoTrack(videoTrack: VideoTrack)
-        fun removeRemoteVideoStream(mediaStream: MediaStream)
-        fun onDisconnect()
-        fun sendOffer(sessionDescription: SessionDescription)
-    }
-
     var localMediaStream: MediaStream? = null
 
-    var listener: Listener? = null
-
     // *Comments copied from webrtc demo app*
     // Executor thread is started once and is used for all
     // peer connection API calls to ensure new peer connection factory is
@@ -102,7 +91,7 @@ class WebRtcPeerConnectionManager @Inject constructor(
 
     private var videoSource: VideoSource? = null
     private var audioSource: AudioSource? = null
-    private var audioTrack: AudioTrack? = null
+    private var localAudioTrack: AudioTrack? = null
 
     private var videoCapturer: VideoCapturer? = null
 
@@ -171,60 +160,6 @@ class WebRtcPeerConnectionManager @Inject constructor(
         peerConnection = peerConnectionFactory?.createPeerConnection(iceServers, observer)
     }
 
-    // TODO REMOVE THIS FUNCTION
-    private fun createPeerConnection(videoCapturer: VideoCapturer) {
-        executor.execute {
-            Timber.v("## VOIP PeerConnectionFactory.createPeerConnection $peerConnectionFactory...")
-            // Following instruction here: https://stackoverflow.com/questions/55085726/webrtc-create-peerconnectionfactory-object
-            val surfaceTextureHelper = SurfaceTextureHelper.create("CaptureThread", rootEglBase!!.eglBaseContext)
-
-            videoSource = peerConnectionFactory?.createVideoSource(videoCapturer.isScreencast)
-            Timber.v("## VOIP Local video source created")
-            videoCapturer.initialize(surfaceTextureHelper, context.applicationContext, videoSource!!.capturerObserver)
-            videoCapturer.startCapture(1280, 720, 30)
-
-            localVideoTrack = peerConnectionFactory?.createVideoTrack("ARDAMSv0", videoSource)?.also {
-                Timber.v("## VOIP Local video track created")
-//                localSurfaceRenderer?.get()?.let { surface ->
-// //                    it.addSink(surface)
-// //                }
-            }
-
-            // create a local audio track
-            Timber.v("## VOIP create local audio track")
-            audioSource = peerConnectionFactory?.createAudioSource(DEFAULT_AUDIO_CONSTRAINTS)
-            audioTrack = peerConnectionFactory?.createAudioTrack(AUDIO_TRACK_ID, audioSource)
-
-//            pipRenderer.setMirror(true)
-//            localVideoTrack?.addSink(pipRenderer)
-//
-
-//            val iceCandidateSource: PublishSubject<IceCandidate> = PublishSubject.create()
-//
-//            iceCandidateSource
-//                    .buffer(400, TimeUnit.MILLISECONDS)
-//                    .subscribe {
-//                        // omit empty :/
-//                        if (it.isNotEmpty()) {
-//                            listener.addLocalIceCandidate()
-//                            callViewModel.handle(VectorCallViewActions.AddLocalIceCandidate(it))
-//                        }
-//                    }
-//                    .disposeOnDestroy()
-
-            localMediaStream = peerConnectionFactory?.createLocalMediaStream("ARDAMS") // magic value?
-            localMediaStream?.addTrack(localVideoTrack)
-            localMediaStream?.addTrack(audioTrack)
-
-//            val constraints = MediaConstraints()
-//            constraints.mandatory.add(MediaConstraints.KeyValuePair("OfferToReceiveAudio", "true"))
-//            constraints.mandatory.add(MediaConstraints.KeyValuePair("OfferToReceiveVideo", "true"))
-
-            Timber.v("## VOIP add local stream to peer connection")
-            peerConnection?.addStream(localMediaStream)
-        }
-    }
-
     private fun startCall() {
         createPeerConnectionFactory()
         createPeerConnection(object : PeerConnectionObserverAdapter() {
@@ -244,15 +179,12 @@ class WebRtcPeerConnectionManager @Inject constructor(
                     mediaStream.videoTracks?.firstOrNull()?.let { videoTrack ->
                         remoteVideoTrack = videoTrack
                         remoteVideoTrack?.setEnabled(true)
-                        remoteVideoTrack?.addSink(remoteViewRenderer)
+                        remoteViewRenderer?.let { remoteVideoTrack?.addSink(it) }
                     }
                 }
             }
 
             override fun onRemoveStream(mediaStream: MediaStream?) {
-                mediaStream?.let {
-                    listener?.removeRemoteVideoStream(it)
-                }
                 remoteSurfaceRenderer?.get()?.let {
                     remoteVideoTrack?.removeSink(it)
                 }
@@ -262,7 +194,7 @@ class WebRtcPeerConnectionManager @Inject constructor(
             override fun onIceConnectionChange(p0: PeerConnection.IceConnectionState?) {
                 Timber.v("## VOIP onIceConnectionChange $p0")
                 if (p0 == PeerConnection.IceConnectionState.DISCONNECTED) {
-                    listener?.onDisconnect()
+                    endCall()
                 }
             }
         })
@@ -313,8 +245,12 @@ class WebRtcPeerConnectionManager @Inject constructor(
     fun attachViewRenderers(localViewRenderer: SurfaceViewRenderer, remoteViewRenderer: SurfaceViewRenderer) {
         this.localViewRenderer = localViewRenderer
         this.remoteViewRenderer = remoteViewRenderer
+        this.localSurfaceRenderer = WeakReference(localViewRenderer)
+        this.remoteSurfaceRenderer = WeakReference(remoteViewRenderer)
+
         audioSource = peerConnectionFactory?.createAudioSource(DEFAULT_AUDIO_CONSTRAINTS)
-        audioTrack = peerConnectionFactory?.createAudioTrack(AUDIO_TRACK_ID, audioSource)
+        localAudioTrack = peerConnectionFactory?.createAudioTrack(AUDIO_TRACK_ID, audioSource)
+        localAudioTrack?.setEnabled(true)
 
         localViewRenderer.setMirror(true)
         localVideoTrack?.addSink(localViewRenderer)
@@ -334,27 +270,27 @@ class WebRtcPeerConnectionManager @Inject constructor(
             Timber.v("## VOIP Local video source created")
             videoCapturer.initialize(surfaceTextureHelper, context.applicationContext, videoSource!!.capturerObserver)
             videoCapturer.startCapture(1280, 720, 30)
-            localVideoTrack = peerConnectionFactory?.createVideoTrack("ARDAMSv0", videoSource)?.also {
+            localVideoTrack = peerConnectionFactory?.createVideoTrack("ARDAMSv0", videoSource)
-                Timber.v("## VOIP Local video track created")
+            Timber.v("## VOIP Local video track created")
-                localSurfaceRenderer?.get()?.let { surface ->
+            localSurfaceRenderer?.get()?.let { surface ->
-                    it.addSink(surface)
+                localVideoTrack?.addSink(surface)
-                }
             }
+            localVideoTrack?.setEnabled(true)
+
+            localVideoTrack?.addSink(localViewRenderer)
             localMediaStream?.addTrack(localVideoTrack)
+            remoteVideoTrack?.let {
+                it.setEnabled(true)
+                it.addSink(remoteViewRenderer)
+            }
         }
 
-        localVideoTrack?.addSink(localViewRenderer)
+        localMediaStream?.addTrack(localAudioTrack)
-        remoteVideoTrack?.let {
-            it.setEnabled(true)
-            it.addSink(remoteViewRenderer)
-        }
-        localMediaStream?.addTrack(audioTrack)
 
         Timber.v("## VOIP add local stream to peer connection")
         peerConnection?.addStream(localMediaStream)
 
-        localSurfaceRenderer = WeakReference(localViewRenderer)
+        startCall()
-        remoteSurfaceRenderer = WeakReference(remoteViewRenderer)
     }
 
     fun detachRenderers() {

vector/src/main/java/im/vector/riotx/features/call/telecom/CallConnection.kt

@@ -23,10 +23,6 @@ import android.telecom.DisconnectCause
 import androidx.annotation.RequiresApi
 import im.vector.riotx.features.call.VectorCallViewModel
 import im.vector.riotx.features.call.WebRtcPeerConnectionManager
-import org.webrtc.IceCandidate
-import org.webrtc.MediaStream
-import org.webrtc.SessionDescription
-import org.webrtc.VideoTrack
 import timber.log.Timber
 import javax.inject.Inject
 
@@ -34,7 +30,7 @@ import javax.inject.Inject
         private val context: Context,
         private val roomId: String,
         val callId: String
-) : Connection(), WebRtcPeerConnectionManager.Listener {
+) : Connection() {
 
     @Inject lateinit var peerConnectionManager: WebRtcPeerConnectionManager
     @Inject lateinit var callViewModel: VectorCallViewModel
@@ -113,20 +109,4 @@ import javax.inject.Inject
         //peerConnectionManager.startCall()
          */
     }
-
-    override fun addLocalIceCandidate(candidates: IceCandidate) {
-    }
-
-    override fun addRemoteVideoTrack(videoTrack: VideoTrack) {
-    }
-
-    override fun addLocalVideoTrack(videoTrack: VideoTrack) {
-    }
-
-    override fun removeRemoteVideoStream(mediaStream: MediaStream) {
-    }
-
-    override fun sendOffer(sessionDescription: SessionDescription) {
-
-    }
 }