PeerConnectionTransport

+package io.livekit.android.room
+
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedInject
+import org.webrtc.*
+
+class PeerConnectionTransport
+@AssistedInject
+constructor(
+    config: PeerConnection.RTCConfiguration,
+    listener: PeerConnection.Observer,
+    @Assisted connectionFactory: PeerConnectionFactory
+) {
+    val peerConnection: PeerConnection = connectionFactory.createPeerConnection(
+        config,
+        listener
+    ) ?: throw IllegalStateException("peer connection creation failed?")
+    val pendingCandidates = mutableListOf<IceCandidate>()
+
+    fun addIceCandidate(candidate: IceCandidate) {
+        if (peerConnection.remoteDescription != null) {
+            peerConnection.addIceCandidate(candidate)
+        } else {
+            pendingCandidates.add(candidate)
+        }
+    }
+
+    fun setRemoteDescription(sd: SessionDescription) {
+        peerConnection.setRemoteDescription(object : SdpObserver {
+            override fun onCreateSuccess(p0: SessionDescription?) {
+            }
+
+            override fun onSetSuccess() {
+                pendingCandidates.forEach { pending ->
+                    peerConnection.addIceCandidate(pending)
+                }
+                pendingCandidates.clear()
+            }
+
+            override fun onCreateFailure(p0: String?) {
+            }
+
+            override fun onSetFailure(p0: String?) {
+            }
+
+        }, sd)
+    }
+
+    fun close() {
+        peerConnection.close()
+    }
+}
\ No newline at end of file

@@ -13,10 +13,11 @@ import okhttp3.WebSocket
 import okhttp3.WebSocketListener
 import okio.ByteString
 import org.webrtc.IceCandidate
+import org.webrtc.PeerConnection
 import org.webrtc.SessionDescription
 import javax.inject.Inject
 
-internal class RTCClient
+class RTCClient
 @Inject
 constructor(
     private val websocketFactory: WebSocket.Factory,
@@ -28,7 +29,7 @@ constructor(
     private var currentWs: WebSocket? = null
     var listener: Listener? = null
 
-    fun connect(
+    fun join(
         host: String,
         token: String,
         isSecure: Boolean,
@@ -166,7 +167,7 @@ constructor(
         val request = Rtc.SignalRequest.newBuilder()
             .setAddTrack(addTrackRequest)
             .build()
-        
+
         sendRequest(request)
     }
 
@@ -240,5 +241,16 @@ constructor(
         const val SD_TYPE_ANSWER = "answer"
         const val SD_TYPE_OFFER = "offer"
         const val SD_TYPE_PRANSWER = "pranswer"
+
+        private fun iceServer(url: String) =
+            PeerConnection.IceServer.builder(url).createIceServer()
+
+        val DEFAULT_ICE_SERVERS = listOf(
+            iceServer("stun:stun.l.google.com:19302"),
+            iceServer("stun:stun1.l.google.com:19302"),
+            iceServer("stun:stun2.l.google.com:19302"),
+            iceServer("stun:stun3.l.google.com:19302"),
+            iceServer("stun:stun4.l.google.com:19302"),
+        )
     }
 }
\ No newline at end of file

 package io.livekit.android.room
 
-internal class RTCEngine {
+import org.webrtc.PeerConnection
+import javax.inject.Inject
 
+class RTCEngine
+@Inject
+constructor(
+    private val client: RTCClient
+) {
+
+    init {
+        val rtcConfig = PeerConnection.RTCConfiguration(RTCClient.DEFAULT_ICE_SERVERS).apply {
+            sdpSemantics = PeerConnection.SdpSemantics.UNIFIED_PLAN
+            continualGatheringPolicy = PeerConnection.ContinualGatheringPolicy.GATHER_CONTINUALLY
+        }
+
+    }
+
+    suspend fun join(url: String, token: String, isSecure: Boolean) {
+        client.join(url, token, isSecure)
+    }
 }
\ No newline at end of file

 package io.livekit.android.room
 
-class Room(
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedInject
+import io.livekit.android.ConnectOptions
 
+class Room
+@AssistedInject
+constructor(
+    private val connectOptions: ConnectOptions,
+    @Assisted private val engine: RTCEngine,
 ) {
 
+    suspend fun connect() {
+        engine.join(connectOptions)
+    }
 }
\ No newline at end of file