separate onJoin and onICEConnected to eliminate race conditions. clean up after …

…tracks upon disconnect

-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
\ No newline at end of file

@@ -25,6 +25,7 @@ class PublisherTransportObserver(
         Timber.v { "onIceConnection new state: $newState" }
         if (state == PeerConnection.IceConnectionState.CONNECTED && !engine.iceConnected) {
             engine.iceConnected = true
+            engine.listener?.onICEConnected()
         } else if (state == PeerConnection.IceConnectionState.FAILED) {
             // when we publish tracks, some WebRTC versions will send out disconnected events periodically
             engine.iceConnected = false

@@ -221,8 +221,7 @@ constructor(
         }
 
         if (!sent) {
-            Timber.d { "error sending request: $request" }
-            throw IllegalStateException()
+            Timber.e { "error sending request: $request" }
         }
     }
 

@@ -107,6 +107,7 @@ constructor(
 
     interface Listener {
         fun onJoin(response: LivekitRtc.JoinResponse)
+        fun onICEConnected()
         fun onAddTrack(track: MediaStreamTrack, streams: Array<out MediaStream>)
 //        fun onPublishLocalTrack(cid: String, track: LivekitModels.TrackInfo)
         fun onAddDataChannel(channel: DataChannel)
@@ -136,7 +137,6 @@ constructor(
     }
 
     override fun onJoin(info: LivekitRtc.JoinResponse) {
-
         val iceServers = mutableListOf<PeerConnection.IceServer>()
         for(serverInfo in info.iceServersList){
             val username = serverInfo.username ?: ""
@@ -161,7 +161,6 @@ constructor(
                 Timber.e{"   $it"}
             }
         }
-        listener?.onJoin(info)
 
         val rtcConfig = PeerConnection.RTCConfiguration(iceServers).apply {
             sdpSemantics = PeerConnection.SdpSemantics.UNIFIED_PLAN
@@ -194,6 +193,7 @@ constructor(
 
             client.sendOffer(sdpOffer)
         }
+        listener?.onJoin(info)
     }
 
     override fun onAnswer(sessionDescription: SessionDescription) {

@@ -66,7 +66,6 @@ constructor(
     }
 
     fun disconnect() {
-        engine.close()
         handleDisconnect()
     }
 
@@ -138,6 +137,10 @@ constructor(
     }
 
     private fun handleDisconnect() {
+        for (track in localParticipant?.tracks.values) {
+            track.track?.stop()
+        }
+        engine.close()
         state = State.DISCONNECTED
         listener?.onDisconnect(this, null)
     }
@@ -175,7 +178,9 @@ constructor(
                 getOrCreateRemoteParticipant(it.sid, it)
             }
         }
+    }
 
+    override fun onICEConnected() {
         state = State.CONNECTED
         connectContinuation?.resume(Unit)
         connectContinuation = null

@@ -20,6 +20,11 @@ class LocalVideoTrack(
         capturer.startCapture(400, 400, 30)
     }
 
+    override fun stop() {
+        capturer.stopCapture()
+        super.stop()
+    }
+
     companion object {
         internal fun createTrack(
             peerConnectionFactory: PeerConnectionFactory,
@@ -45,7 +50,6 @@ class LocalVideoTrack(
             )
         }
 
-
         private fun createVideoCapturer(context: Context): VideoCapturer? {
             val videoCapturer: VideoCapturer? = if (Camera2Enumerator.isSupported(context)) {
                 createCameraCapturer(Camera2Enumerator(context))

@@ -5,7 +5,8 @@ import org.webrtc.VideoSink
 import org.webrtc.VideoTrack
 
 open class VideoTrack(name: String, override val rtcTrack: VideoTrack) :
-    MediaTrack(name, LivekitModels.TrackType.VIDEO, rtcTrack){
+    MediaTrack(name, LivekitModels.TrackType.VIDEO, rtcTrack) {
+    private val sinks: MutableList<VideoSink> = ArrayList();
 
     var enabled: Boolean
         get() = rtcTrack.enabled()
@@ -13,7 +14,21 @@ open class VideoTrack(name: String, override val rtcTrack: VideoTrack) :
             rtcTrack.setEnabled(value)
         }
 
-    fun addRenderer(renderer: VideoSink) = rtcTrack.addSink(renderer)
+    fun addRenderer(renderer: VideoSink) {
+        sinks.add(renderer)
+        rtcTrack.addSink(renderer)
+    }
 
-    fun removeRenderer(renderer: VideoSink) = rtcTrack.addSink(renderer)
+    fun removeRenderer(renderer: VideoSink) {
+        sinks.remove(renderer)
+        rtcTrack.addSink(renderer)
+    }
+
+    override fun stop() {
+        for (sink in sinks) {
+            rtcTrack.removeSink(sink)
+        }
+        sinks.clear()
+        super.stop()
+    }
 }