Add LICENSE.md

.idea/deploymentTargetSelector.xml

@@ -4,7 +4,7 @@
     <selectionStates>
       <SelectionState runConfigName="app">
         <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2025-03-18T16:06:30.698647383Z">
+        <DropdownSelection timestamp="2025-04-05T11:04:12.656433726Z">
           <Target type="DEFAULT_BOOT">
             <handle>
               <DeviceId pluginId="PhysicalDevice" identifier="serial=d3e11beb" />

LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Fritz Heiden
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

app/src/main/AndroidManifest.xml

@@ -28,6 +28,7 @@
         tools:targetApi="31">
         <activity
             android:name=".MainActivity"
+            android:windowSoftInputMode="adjustResize"
             android:exported="true"
             android:theme="@style/Theme.TVController">
             <intent-filter>

app/src/main/java/com/example/tvcontroller/MainActivity.kt

@@ -5,34 +5,17 @@ import android.util.Log
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.padding
-import androidx.compose.material3.Icon
-import androidx.compose.material3.NavigationBar
-import androidx.compose.material3.NavigationBarItem
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.painterResource
 import androidx.core.app.ActivityCompat
 import androidx.lifecycle.lifecycleScope
-import androidx.navigation.NavHostController
-import androidx.navigation.compose.NavHost
-import androidx.navigation.compose.composable
-import androidx.navigation.compose.currentBackStackEntryAsState
-import androidx.navigation.compose.rememberNavController
 import com.example.tvcontroller.client.WebClient
 import com.example.tvcontroller.client.WebsocketClient
 import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.CameraService
 import com.example.tvcontroller.services.ControllerService
 import com.example.tvcontroller.services.DeviceService
 import com.example.tvcontroller.services.webrtc.WebRtcService
 import com.example.tvcontroller.ui.theme.TVControllerTheme
-import com.example.tvcontroller.ui.views.CameraView
+import com.example.tvcontroller.ui.views.MainView
-import com.example.tvcontroller.ui.views.RemoteView
-import com.example.tvcontroller.ui.views.SettingsView
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
@@ -41,31 +24,47 @@ const val TAG = "MainActivity"
 class MainActivity : ComponentActivity() {
     private val webClient by lazy { WebClient() }
     private val websocketClient by lazy { WebsocketClient(webClient.client) }
-    private val webRtcService by lazy { WebRtcService(applicationContext, websocketClient) }
+    private val cameraService by lazy { CameraService(applicationContext) }
+    private val webRtcService by lazy {
+        WebRtcService(
+            applicationContext,
+            websocketClient,
+            cameraService
+        )
+    }
     private val bluetoothService by lazy { BluetoothService(applicationContext) }
-    private val deviceService by lazy { DeviceService(applicationContext, webClient) }
+    private val deviceService by lazy { DeviceService(applicationContext, webClient, websocketClient) }
-    private val controllerService by lazy { ControllerService(bluetoothService) }
+    private val controllerService by lazy { ControllerService(bluetoothService, webRtcService) }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         checkPermissions()
 
         lifecycleScope.launch {
-            deviceService.initialize()
+            deviceService.onStatusChanged {
-            if (deviceService.serverAddress.isEmpty() || deviceService.token.isEmpty()) return@launch
+                when (it) {
-            lifecycleScope.launch(Dispatchers.IO) {
+                    DeviceService.STATUS_REGISTERED -> {
-                websocketClient.connect(deviceService.serverAddress, deviceService.token)
+                        lifecycleScope.launch(Dispatchers.IO) {
+                            websocketClient.connect(deviceService.serverAddress, deviceService.token)
+                        }
+                        webRtcService.connect()
+                    }
+                    DeviceService.STATUS_UNREGISTERED -> {
+                        Log.i(TAG, "Device unregistered")
+                    }
+                }
             }
-            webRtcService.connect()
+            deviceService.initialize()
         }
         enableEdgeToEdge()
         setContent {
             TVControllerTheme {
-                TvControllerApp(
+                MainView(
                     deviceService = deviceService,
                     controllerService = controllerService,
                     bluetoothService = bluetoothService,
-                    webRtcService = webRtcService
+                    webRtcService = webRtcService,
+                    cameraService = cameraService
                 )
             }
         }
@@ -77,68 +76,9 @@ class MainActivity : ComponentActivity() {
             Log.i(TAG, "Requesting Bluetooth permissions")
             ActivityCompat.requestPermissions(this, BluetoothService.BLUETOOTH_PERMISSIONS, 0)
         }
-    }
+        if (!cameraService.hasRequiredPermissions()) {
-}
+            Log.i(TAG, "Requesting Camera permissions")
-
+            ActivityCompat.requestPermissions(this, CameraService.CAMERA_PERMISSIONS, 0)
-@Composable
-fun TvControllerApp(
-    navController: NavHostController = rememberNavController(),
-    deviceService: DeviceService,
-    controllerService: ControllerService,
-    bluetoothService: BluetoothService,
-    webRtcService: WebRtcService
-) {
-    val backStackEntry by navController.currentBackStackEntryAsState()
-    val currentScreen = Screen.valueOf(backStackEntry?.destination?.route ?: Screen.Camera.name)
-    val baselineCamera24 = painterResource(R.drawable.baseline_camera_24)
-    val baselineRemote24 = painterResource(R.drawable.baseline_settings_remote_24)
-    val baselineSettings24 = painterResource(R.drawable.baseline_settings_24)
-    Scaffold(modifier = Modifier.fillMaxSize(), bottomBar = {
-        NavigationBar {
-            NavigationBarItem(
-                onClick = { navController.navigate(Screen.Camera.name) }, icon = {
-                    Icon(
-                        baselineCamera24, contentDescription = "Camera"
-                    )
-                }, label = { Text("Camera") }, selected = currentScreen == Screen.Camera
-            )
-            NavigationBarItem(
-                onClick = { navController.navigate(Screen.Remote.name) }, icon = {
-                    Icon(
-                        baselineRemote24, contentDescription = "Remote"
-                    )
-                }, label = { Text("Remote") }, selected = currentScreen == Screen.Remote
-            )
-            NavigationBarItem(
-                onClick = { navController.navigate(Screen.Settings.name) }, icon = {
-                    Icon(
-                        baselineSettings24, contentDescription = "Settings"
-                    )
-                }, label = { Text("Settings") }, selected = currentScreen == Screen.Settings
-            )
-        }
-    }) { innerPadding ->
-        NavHost(
-            navController = navController,
-            startDestination = Screen.Settings.name,
-            modifier = Modifier.padding(innerPadding)
-        ) {
-            composable(route = Screen.Camera.name) {
-                CameraView(
-                    eglBaseContext = webRtcService.eglBaseContext,
-                    videoTrack = webRtcService.videoTrack
-                )
-            }
-            composable(route = Screen.Remote.name) {
-                RemoteView(
-                    controllerService = controllerService
-                )
-            }
-            composable(route = Screen.Settings.name) {
-                SettingsView(
-                    deviceService = deviceService, bluetoothService = bluetoothService
-                )
-            }
         }
     }
 }

app/src/main/java/com/example/tvcontroller/Screen.kt

@@ -1,7 +0,0 @@
-package com.example.tvcontroller
-
-enum class Screen {
-    Camera,
-    Remote,
-    Settings
-}

app/src/main/java/com/example/tvcontroller/Settings.kt

@@ -1,8 +0,0 @@
-package com.example.tvcontroller
-
-object Settings {
-    enum class ConnectionState {
-        Unregistered,
-        Registered,
-    }
-}

app/src/main/java/com/example/tvcontroller/client/WebsocketClient.kt

@@ -15,11 +15,14 @@ private const val TAG = "WebsocketClient"
 class WebsocketClient(private val client: HttpClient) {
     private var websocket: DefaultWebSocketSession? = null
     private val dataHandlers = mutableListOf<(String) -> Unit>()
+    private val connectedHandlers = mutableListOf<() -> Unit>()
+    private val disconnectedHandlers = mutableListOf<() -> Unit>()
 
     suspend fun connect(serverAddress: String, token: String) {
         Log.i(TAG, "Connecting to websocket at $serverAddress")
         val (host, port) = serverAddress.split(":")
         val portInt = if (port.isEmpty()) 80 else port.toInt()
+        connectedHandlers.forEach { it() }
         client.webSocket(
             method = HttpMethod.Get,
             host = host,
@@ -40,6 +43,16 @@ class WebsocketClient(private val client: HttpClient) {
                 }
             }
         }
+        Log.i(TAG, "Websocket connection closed")
+        disconnectedHandlers.forEach { it() }
+    }
+
+    fun onConnected(handler: () -> Unit) {
+        connectedHandlers.add(handler)
+    }
+
+    fun onDisconnected(handler: () -> Unit) {
+        disconnectedHandlers.add(handler)
     }
 
     fun onData(handler: (String) -> Unit) {

app/src/main/java/com/example/tvcontroller/data/RemoteCommand.kt

@@ -1,9 +1,7 @@
 package com.example.tvcontroller.data
 
 class RemoteCommand {
-    var functionName: String? = null
     var protocol: String? = null
     var device: String? = null
-    var subdevice: String? = null
+    var command: String? = null
-    var function: String? = null
 }

app/src/main/java/com/example/tvcontroller/services/CameraService.kt

@@ -2,16 +2,54 @@ package com.example.tvcontroller.services
 
 import android.content.Context
 import android.content.pm.PackageManager
+import android.hardware.camera2.CameraCharacteristics
+import android.hardware.camera2.CameraManager
+import org.webrtc.Camera2Capturer
+import org.webrtc.DefaultVideoDecoderFactory
+import org.webrtc.EglBase
+import org.webrtc.HardwareVideoEncoderFactory
+import org.webrtc.SimulcastVideoEncoderFactory
+import org.webrtc.SoftwareVideoEncoderFactory
 
 class CameraService(private val context: Context) {
+    var eglBaseContext: EglBase.Context = EglBase.create().eglBaseContext
+    val cameraManager by lazy { context.getSystemService(Context.CAMERA_SERVICE) as CameraManager }
+    val videoDecoderFactory by lazy { DefaultVideoDecoderFactory(eglBaseContext) }
+    val videoEncoderFactory by lazy {
+        SimulcastVideoEncoderFactory(
+            HardwareVideoEncoderFactory(eglBaseContext, true, true),
+            SoftwareVideoEncoderFactory()
+        )
+    }
+
+    fun createCameraCapturer(): Camera2Capturer {
+        val ids = cameraManager.cameraIdList
+        var foundCamera = false;
+        var cameraId = ""
+        for (id in ids) {
+            val characteristics = cameraManager.getCameraCharacteristics(id)
+            val facing = characteristics.get(CameraCharacteristics.LENS_FACING)
+            if (facing == CameraCharacteristics.LENS_FACING_BACK) {
+                cameraId = id
+                foundCamera = true
+                break
+            }
+        }
+        if (!foundCamera) {
+            cameraId = ids.first()
+        }
+        val cameraCapturer = Camera2Capturer(context, cameraId, null)
+        return cameraCapturer
+    }
+
     fun hasRequiredPermissions(): Boolean {
-        return CAMERAX_PERMISSIONS.all {
+        return CAMERA_PERMISSIONS.all {
             context.checkSelfPermission(it) == PackageManager.PERMISSION_GRANTED
         }
     }
 
     companion object {
-        val CAMERAX_PERMISSIONS = arrayOf(
+        val CAMERA_PERMISSIONS = arrayOf(
             android.Manifest.permission.CAMERA,
             android.Manifest.permission.RECORD_AUDIO
         )

app/src/main/java/com/example/tvcontroller/services/ControllerService.kt

@@ -1,32 +1,33 @@
 package com.example.tvcontroller.services
 
-import android.content.Context
 import android.util.Log
 import com.example.tvcontroller.data.RemoteCommand
+import com.example.tvcontroller.services.webrtc.WebRtcService
 import org.json.JSONObject
+import java.nio.ByteBuffer
+import java.nio.charset.StandardCharsets
 
 
 class ControllerService(
-    private val bluetoothService: BluetoothService
+    private val bluetoothService: BluetoothService,
+    private val webRtcService: WebRtcService
 ) {
-    private val samsungCommands = mutableMapOf<String, RemoteCommand>()
-
     init {
         loadCommands()
+        webRtcService.onDataChannelData(this::handleWebRtcData)
     }
 
-    fun sendCommand(command: String) {
+    fun sendCommand(command: RemoteCommand) {
-        if (samsungCommands[command] == null) return
+        val jsonString = remoteCommandToJsonString(command)
-        Log.i("ControllerService", "Sending command: $command")
+        Log.i(TAG, "Sending command: $jsonString")
-        val jsonString = remoteCommandToJsonString(samsungCommands[command]!!)
         sendData(jsonString)
     }
 
     fun remoteCommandToJsonString(command: RemoteCommand): String {
         var commandObject = JSONObject()
         commandObject.put("protocol", command.protocol)
-        commandObject.put("address", command.device)
+        commandObject.put("device", command.device)
-        commandObject.put("command", command.function)
+        commandObject.put("command", command.command)
         return commandObject.toString()
     }
 
@@ -37,7 +38,27 @@ class ControllerService(
     fun loadCommands() {
     }
 
+    fun handleWebRtcData(data: ByteBuffer) {
+        val dataString = StandardCharsets.UTF_8.decode(data).toString()
+        val json = JSONObject(dataString)
+        if (!json.has("type") || json.getString("type") != MESSAGE_TYPE_COMMAND) return
+        val commandJson = json.getJSONObject("data")
+        val protocol = if (commandJson.has("protocol")) commandJson.getString("protocol") else null
+        val device = if (commandJson.has("device")) commandJson.getString("device") else null
+        val command = if (commandJson.has("commandNumber")) commandJson.getString("commandNumber") else null
+        val remoteCommand = RemoteCommand().apply {
+            this.protocol = protocol
+            this.device = device
+            this.command = command
+        }
+        sendCommand(remoteCommand)
+    }
+
     companion object {
+        private const val TAG = "ControllerService"
+
+        const val MESSAGE_TYPE_COMMAND = "command"
+
         const val POWER = "POWER"
         const val CURSOR_UP = "CURSOR UP"
         const val CURSOR_DOWN = "CURSOR DOWN"

app/src/main/java/com/example/tvcontroller/services/DeviceService.kt

@@ -3,28 +3,62 @@ package com.example.tvcontroller.services
 import android.content.Context
 import android.content.Context.MODE_PRIVATE
 import android.util.Log
+import androidx.lifecycle.lifecycleScope
 import com.example.tvcontroller.client.WebClient
+import com.example.tvcontroller.client.WebsocketClient
 import com.example.tvcontroller.data.Integration
 import io.ktor.client.call.body
 import io.ktor.http.HttpMethod
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import org.json.JSONObject
 
-private const val SHARED_PREFERENCES_NAME = "devices";
-private const val TAG = "DeviceService"
 
-class DeviceService(private val context: Context, private val client: WebClient) {
+class DeviceService(
+    private val context: Context,
+    private val client: WebClient,
+    private val websocketClient: WebsocketClient
+) {
     var serverAddress: String = ""
     var token: String = ""
-        private set(value) {
+    var status: String = STATUS_UNREGISTERED
-            field = value
+        private set(status) {
-            updateDefaultCookies()
+            field = status
+            statusChangedListeners.forEach { it(status) }
         }
     private var deviceId: String = ""
+    private val statusChangedListeners = mutableListOf<(String) -> Unit>()
 
     suspend fun initialize() {
+        websocketClient.onConnected { status = STATUS_CONNECTED }
+        websocketClient.onDisconnected { status = STATUS_REGISTERED }
+        onStatusChanged {
+            when(it) {
+                STATUS_UNREGISTERED -> {
+                    token = ""
+                    deviceId = ""
+                    updateDefaultCookies()
+                    savePreferences()
+                }
+                STATUS_REGISTERED -> {
+                    Log.i(TAG, "Device registered with id $deviceId")
+                    savePreferences()
+                    connectWebsocket()
+                }
+            }
+        }
         loadPreferences()
         if (token.isEmpty()) return
-        getIntegration()
+        updateDefaultCookies()
+        val integration = getIntegration()
+        Log.i(TAG, "Integration: $integration")
+        status = if (integration != null) {
+            STATUS_REGISTERED
+        } else {
+            STATUS_UNREGISTERED
+        }
     }
 
     private fun updateDefaultCookies() {
@@ -34,14 +68,15 @@ class DeviceService(private val context: Context, private val client: WebClient)
     }
 
     suspend fun registerIntegration(name: String, code: String) {
-        Log.i(TAG, "Creating integration for $name with code $code at $serverAddress")
+        Log.i(TAG, "Registering integration for $name with code $code at $serverAddress")
+        savePreferences()
         val requestJson = JSONObject().apply {
             put("name", name)
             put("code", code)
         }
         val response =
             client.sendJsonRequest(
-                "http://$serverAddress/api/integrations",
+                "http://$serverAddress/api/integrations/register",
                 HttpMethod.Post,
                 requestJson
             ) ?: return
@@ -49,12 +84,23 @@ class DeviceService(private val context: Context, private val client: WebClient)
         val responseJson = JSONObject(response.body<String>())
         if (response.status.value != 200) {
             val error = responseJson.getString("error")
-            Log.e(TAG, "Error getting integration: ${response.status.value} $error")
+            Log.e(TAG, "Error registering integration: ${response.status.value} $error")
             return
         }
         token = responseJson.getString("token")
         deviceId = responseJson.getString("id")
-        savePreferences()
+        status = STATUS_REGISTERED
+    }
+
+    fun onStatusChanged(listener: (String) -> Unit) {
+        statusChangedListeners.add(listener)
+    }
+
+    @OptIn(DelicateCoroutinesApi::class)
+    fun connectWebsocket() {
+        GlobalScope.launch() {
+            websocketClient.connect(serverAddress, token)
+        }
     }
 
     suspend fun getIntegration(): Integration? {
@@ -77,24 +123,33 @@ class DeviceService(private val context: Context, private val client: WebClient)
 
     private fun loadPreferences() {
         val sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES_NAME, MODE_PRIVATE)
-        serverAddress = sharedPreferences.getString("server_address", "")!!
+        serverAddress = sharedPreferences.getString(SERVER_ADDRESS_KEY, "")!!
-        token = sharedPreferences.getString("token", "")!!
+        token = sharedPreferences.getString(TOKEN_KEY, "")!!
-        deviceId = sharedPreferences.getString("device_id", "")!!
+        deviceId = sharedPreferences.getString(DEVICE_ID_KEY, "")!!
         Log.i(TAG, "Loaded preferences: $serverAddress $token")
     }
 
     private fun savePreferences() {
+        Log.i(TAG, "Saving preferences")
         val sharedPreferences = context.getSharedPreferences(SHARED_PREFERENCES_NAME, MODE_PRIVATE)
         val editor = sharedPreferences.edit()
         editor.apply {
-            putString("server_address", serverAddress)
+            putString(SERVER_ADDRESS_KEY, serverAddress)
-            putString("token", token)
+            putString(TOKEN_KEY, token)
-            putString("device_id", deviceId)
+            putString(DEVICE_ID_KEY, deviceId)
             apply()
         }
     }
 
     companion object {
-        const val TYPE_SIGNALING = "signaling"
+        const val STATUS_UNREGISTERED = "unregistered"
+        const val STATUS_REGISTERED = "registered"
+        const val STATUS_CONNECTED = "connected"
+
+        private const val SHARED_PREFERENCES_NAME = "devices";
+        private const val SERVER_ADDRESS_KEY = "server_address"
+        private const val TOKEN_KEY = "token"
+        private const val DEVICE_ID_KEY = "device_id"
+        private const val TAG = "DeviceService"
     }
 }

app/src/main/java/com/example/tvcontroller/services/webrtc/RtcPeerConnection.kt

@@ -1,15 +1,11 @@
 package com.example.tvcontroller.services.webrtc
 
 import android.content.Context
-import android.hardware.camera2.CameraCharacteristics
-import android.hardware.camera2.CameraManager
 import android.util.Log
+import com.example.tvcontroller.services.CameraService
 import org.webrtc.AudioTrack
-import org.webrtc.Camera2Capturer
 import org.webrtc.DataChannel
-import org.webrtc.DefaultVideoDecoderFactory
 import org.webrtc.EglBase
-import org.webrtc.HardwareVideoEncoderFactory
 import org.webrtc.IceCandidate
 import org.webrtc.MediaConstraints
 import org.webrtc.MediaStream
@@ -19,31 +15,24 @@ import org.webrtc.PeerConnectionFactory
 import org.webrtc.PeerConnectionFactory.InitializationOptions
 import org.webrtc.SdpObserver
 import org.webrtc.SessionDescription
-import org.webrtc.SimulcastVideoEncoderFactory
-import org.webrtc.SoftwareVideoEncoderFactory
 import org.webrtc.SurfaceTextureHelper
 import org.webrtc.VideoSource
 import org.webrtc.VideoTrack
+import java.nio.ByteBuffer
+import java.nio.charset.StandardCharsets
 
 private const val TAG = "RtcPeerConnection"
 
-class RtcPeerConnection(private val context: Context) {
+class RtcPeerConnection(private val context: Context, private val cameraService: CameraService) {
     private val peerConnectionFactory by lazy { initializeFactory() }
     private var iceServers = ArrayList<PeerConnection.IceServer>()
-    var eglBaseContext: EglBase.Context = EglBase.create().eglBaseContext
+    var eglBaseContext: EglBase.Context = cameraService.eglBaseContext
-    private val cameraManager by lazy { context.getSystemService(Context.CAMERA_SERVICE) as CameraManager }
+    private val videoCapturer by lazy { cameraService.createCameraCapturer() }
-    private val videoCapturer by lazy { createCameraCapturer() }
     private val surfaceTextureHelper by lazy { createSurfaceTextureHelper() }
     private val videoSource by lazy { createVideoSource() }
-    private val videoDecoderFactory by lazy { DefaultVideoDecoderFactory(eglBaseContext) }
-    private val videoEncoderFactory by lazy {
-        SimulcastVideoEncoderFactory(
-            HardwareVideoEncoderFactory(eglBaseContext, true, true),
-            SoftwareVideoEncoderFactory()
-        )
-    }
     private var peerConnection: PeerConnection? = null
     private val iceCandidateHandlers = ArrayList<((IceCandidate) -> Unit)>()
+    private val dataChannelHandlers = ArrayList<((ByteBuffer) -> Unit)>()
 
 
     fun initialize() {
@@ -55,10 +44,20 @@ class RtcPeerConnection(private val context: Context) {
             override fun onIceCandidate(iceCandidate: IceCandidate?) {
                 iceCandidateHandlers.forEach { it(iceCandidate!!) }
             }
+
             override fun onIceCandidatesRemoved(p0: Array<out IceCandidate?>?) {}
             override fun onAddStream(p0: MediaStream?) {}
             override fun onRemoveStream(p0: MediaStream?) {}
-            override fun onDataChannel(p0: DataChannel?) {}
+            override fun onDataChannel(channel: DataChannel?) {
+                Log.i(TAG, "Data channel created: $channel")
+                channel?.registerObserver(object : DataChannel.Observer {
+                    override fun onBufferedAmountChange(p0: Long) { }
+                    override fun onStateChange() { }
+                    override fun onMessage(p0: DataChannel.Buffer?) {
+                        dataChannelHandlers.forEach { it(p0?.data!!) }
+                    }
+                })
+            }
             override fun onRenegotiationNeeded() {}
         }
         var rtcConfig = PeerConnection.RTCConfiguration(iceServers)
@@ -138,38 +137,23 @@ class RtcPeerConnection(private val context: Context) {
         iceCandidateHandlers.add(handler)
     }
 
+    fun onDataChannelData(handler: (ByteBuffer) -> Unit) {
+        dataChannelHandlers.add(handler)
+    }
+
     private fun initializeFactory(): PeerConnectionFactory {
         val initOptions = InitializationOptions.builder(context).createInitializationOptions()
         PeerConnectionFactory.initialize(initOptions)
 
         val options = PeerConnectionFactory.Options()
         val peerConnectionFactory =
-            PeerConnectionFactory.builder().setVideoDecoderFactory(videoDecoderFactory)
+            PeerConnectionFactory.builder()
-                .setVideoEncoderFactory(videoEncoderFactory).setOptions(options)
+                .setVideoDecoderFactory(cameraService.videoDecoderFactory)
+                .setVideoEncoderFactory(cameraService.videoEncoderFactory).setOptions(options)
                 .createPeerConnectionFactory()
         return peerConnectionFactory
     }
 
-    private fun createCameraCapturer(): Camera2Capturer {
-        val ids = cameraManager.cameraIdList
-        var foundCamera = false;
-        var cameraId = ""
-        for (id in ids) {
-            val characteristics = cameraManager.getCameraCharacteristics(id)
-            val facing = characteristics.get(CameraCharacteristics.LENS_FACING)
-            if (facing == CameraCharacteristics.LENS_FACING_BACK) {
-                cameraId = id
-                foundCamera = true
-                break
-            }
-        }
-        if (!foundCamera) {
-            cameraId = ids.first()
-        }
-        val cameraCapturer = Camera2Capturer(context, cameraId, null)
-        return cameraCapturer
-    }
-
     private fun createSurfaceTextureHelper(): SurfaceTextureHelper {
         val surfaceTextureHelper =
             SurfaceTextureHelper.create("SurfaceTextureHelperThread", eglBaseContext)

app/src/main/java/com/example/tvcontroller/services/webrtc/WebRtcService.kt

@@ -3,22 +3,23 @@ package com.example.tvcontroller.services.webrtc
 import android.content.Context
 import android.util.Log
 import com.example.tvcontroller.client.WebsocketClient
-import com.example.tvcontroller.services.DeviceService
+import com.example.tvcontroller.services.CameraService
 import kotlinx.coroutines.runBlocking
 import org.json.JSONObject
-import org.webrtc.EglBase
 import org.webrtc.IceCandidate
 import org.webrtc.MediaConstraints
 import org.webrtc.SessionDescription
+import java.nio.ByteBuffer
 
-private const val TAG = "WebRtcService"
+class WebRtcService(
-
+    private val context: Context,
-class WebRtcService(private val context: Context, private val websocketClient: WebsocketClient) {
+    private val websocketClient: WebsocketClient,
-    private val rtcPeerConnection by lazy { createRtcPeerConnection() }
+    private val cameraService: CameraService
+) {
+    private val dataChannelHandlers = ArrayList<((ByteBuffer) -> Unit)>()
+    private var rtcPeerConnection: RtcPeerConnection = createRtcPeerConnection()
     val videoTrack by lazy { rtcPeerConnection.createVideoTrack() }
     val audioTrack by lazy { rtcPeerConnection.createAudioTrack() }
-    val eglBaseContext: EglBase.Context
-        get() = rtcPeerConnection.eglBaseContext
     private var peerId: String = ""
 
     fun connect() {
@@ -26,18 +27,24 @@ class WebRtcService(private val context: Context, private val websocketClient: W
         websocketClient.onData(this::handleData)
     }
 
+    fun onDataChannelData(handler: (ByteBuffer) -> Unit) {
+        dataChannelHandlers.add(handler)
+    }
+
     private fun createRtcPeerConnection(): RtcPeerConnection {
         val iceServers = arrayOf("stun:stun.l.google.com:19302")
         val webRtcService = this
-        val rtcPeerConnection = RtcPeerConnection(context).apply {
+        val rtcPeerConnection = RtcPeerConnection(context, cameraService).apply {
             setIceServers(iceServers)
             onIceCandidate(webRtcService::sendIceCandidate)
             initialize()
         }
+        dataChannelHandlers.forEach { rtcPeerConnection.onDataChannelData(it) }
         return rtcPeerConnection
     }
 
     private fun handleOffer(sdp: String) {
+        rtcPeerConnection = createRtcPeerConnection()
         var mediaConstraints = MediaConstraints()
         val remoteSessionDescription = SessionDescription(SessionDescription.Type.OFFER, sdp)
         rtcPeerConnection.apply {
@@ -89,7 +96,7 @@ class WebRtcService(private val context: Context, private val websocketClient: W
 
     private fun sendIceCandidate(iceCandidate: IceCandidate) {
         val messageJson = JSONObject()
-        messageJson.put("type", DeviceService.Companion.TYPE_SIGNALING)
+        messageJson.put("type", TYPE_SIGNALING)
         messageJson.put("target", peerId)
         messageJson.put("message", JSONObject().apply {
             put("candidate", JSONObject().apply {
@@ -108,7 +115,7 @@ class WebRtcService(private val context: Context, private val websocketClient: W
 
     private fun sendAnswer(targetId: String, sdp: String) {
         val messageJson = JSONObject()
-        messageJson.put("type", DeviceService.Companion.TYPE_SIGNALING)
+        messageJson.put("type", TYPE_SIGNALING)
         messageJson.put("target", targetId)
         messageJson.put("message", JSONObject().apply {
             put("sdp", sdp)
@@ -120,4 +127,10 @@ class WebRtcService(private val context: Context, private val websocketClient: W
             websocketClient.sendJson(messageJson)
         }
     }
+
+    companion object {
+        const val TYPE_SIGNALING = "signaling"
+
+        private const val TAG = "WebRtcService"
+    }
 }

app/src/main/java/com/example/tvcontroller/ui/views/CameraView.kt

@@ -1,10 +1,17 @@
 package com.example.tvcontroller.ui.views
 
+import android.content.res.Configuration
+import android.util.Log
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.unit.dp
 import com.example.tvcontroller.ui.components.CameraPreview
 import org.webrtc.EglBase
@@ -12,11 +19,16 @@ import org.webrtc.VideoTrack
 
 @Composable
 fun CameraView(eglBaseContext: EglBase.Context, videoTrack: VideoTrack) {
+    val configuration = LocalConfiguration.current
+    val isLandscape = configuration.orientation == Configuration.ORIENTATION_LANDSCAPE
+    var ratio = if (isLandscape) 16/9f else 9/16f
     Box(
         modifier = Modifier
-            .fillMaxSize()
+            .fillMaxSize(),
-            .padding(all = 16.dp),
+        contentAlignment = Alignment.Center
     ) {
-        CameraPreview(eglBaseContext = eglBaseContext, videoTrack = videoTrack, modifier = Modifier.fillMaxSize())
+        Box(modifier = if (isLandscape) Modifier.aspectRatio(ratio).fillMaxHeight() else Modifier.aspectRatio(ratio).fillMaxWidth()) {
+            CameraPreview(eglBaseContext = eglBaseContext, videoTrack = videoTrack, modifier = Modifier.fillMaxSize())
+        }
     }
 }

app/src/main/java/com/example/tvcontroller/ui/views/MainView.kt

@@ -0,0 +1,152 @@
+package com.example.tvcontroller.ui.views
+
+import android.content.res.Configuration
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.Icon
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.NavigationBarItem
+import androidx.compose.material3.NavigationRail
+import androidx.compose.material3.NavigationRailItem
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.currentBackStackEntryAsState
+import androidx.navigation.compose.rememberNavController
+import com.example.tvcontroller.R
+import com.example.tvcontroller.services.BluetoothService
+import com.example.tvcontroller.services.CameraService
+import com.example.tvcontroller.services.ControllerService
+import com.example.tvcontroller.services.DeviceService
+import com.example.tvcontroller.services.webrtc.WebRtcService
+import com.example.tvcontroller.ui.views.MainViewModel.Companion.CAMERA_VIEW
+import com.example.tvcontroller.ui.views.MainViewModel.Companion.REMOTE_VIEW
+import com.example.tvcontroller.ui.views.MainViewModel.Companion.SETTINGS_VIEW
+
+private data class NavigationItem(
+    var onClick: () -> Unit = {},
+    var icon: @Composable () -> Unit = {},
+    var label: @Composable () -> Unit = {},
+    var selected: Boolean = false
+)
+
+@Composable
+fun MainView(
+    deviceService: DeviceService,
+    controllerService: ControllerService,
+    bluetoothService: BluetoothService,
+    webRtcService: WebRtcService,
+    cameraService: CameraService
+) {
+    val viewModel = viewModel<MainViewModel>()
+    val navController = rememberNavController()
+    val backStackEntry by navController.currentBackStackEntryAsState()
+    val currentView = backStackEntry?.destination?.route
+    val baselineCamera24 = painterResource(R.drawable.baseline_camera_24)
+    val baselineRemote24 = painterResource(R.drawable.baseline_settings_remote_24)
+    val baselineSettings24 = painterResource(R.drawable.baseline_settings_24)
+    val configuration = LocalConfiguration.current
+    val isLandscape = configuration.orientation == Configuration.ORIENTATION_LANDSCAPE
+
+    val navigationItems = listOf(
+        NavigationItem(
+            onClick = { navController.navigate(CAMERA_VIEW) },
+            icon = { Icon(baselineCamera24, contentDescription = "Camera") },
+            label = { Text("Camera") },
+            selected = currentView == CAMERA_VIEW
+        ), NavigationItem(
+            onClick = { navController.navigate(REMOTE_VIEW) },
+            icon = { Icon(baselineRemote24, contentDescription = "Remote") },
+            label = { Text("Remote") },
+            selected = currentView == REMOTE_VIEW
+        ), NavigationItem(
+            onClick = { navController.navigate(SETTINGS_VIEW) },
+            icon = { Icon(baselineSettings24, contentDescription = "Settings") },
+            label = { Text("Settings") },
+            selected = currentView == SETTINGS_VIEW
+        )
+    )
+    Surface(modifier = Modifier.fillMaxSize()) {
+        Scaffold(
+            modifier = Modifier
+                .fillMaxHeight(),
+            bottomBar = {
+                if (!isLandscape) {
+                    NavigationBar {
+                        navigationItems.forEach { item ->
+                            NavigationBarItem(
+                                onClick = item.onClick,
+                                icon = item.icon,
+                                label = item.label,
+                                selected = item.selected,
+                            )
+                        }
+                    }
+                }
+            }) { innerPadding ->
+            Row(Modifier.padding(innerPadding)) {
+                if (isLandscape) {
+                    NavigationRail(
+                        modifier = Modifier
+                            .fillMaxHeight()
+                            .width(64.dp)
+                    ) {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxHeight(),
+                            verticalArrangement = Arrangement.spacedBy(
+                                12.dp, Alignment.CenterVertically
+                            )
+                        ) {
+                            navigationItems.forEach { item ->
+                                NavigationRailItem(
+                                    onClick = item.onClick,
+                                    icon = item.icon,
+                                    label = item.label,
+                                    selected = item.selected,
+                                )
+                            }
+                        }
+                    }
+                }
+                NavHost(
+                    navController = navController,
+                    startDestination = viewModel.currentView.value,
+                ) {
+                    composable(route = CAMERA_VIEW) {
+                        CameraView(
+                            eglBaseContext = cameraService.eglBaseContext,
+                            videoTrack = webRtcService.videoTrack
+                        )
+                    }
+                    composable(route = REMOTE_VIEW) {
+                        RemoteView(
+                            controllerService = controllerService
+                        )
+                    }
+                    composable(route = SETTINGS_VIEW) {
+                        SettingsView(
+                            deviceService = deviceService, bluetoothService = bluetoothService
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+

app/src/main/java/com/example/tvcontroller/ui/views/MainViewModel.kt

@@ -0,0 +1,14 @@
+package com.example.tvcontroller.ui.views
+
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+
+class MainViewModel : ViewModel() {
+    var currentView = mutableStateOf(CAMERA_VIEW)
+
+    companion object {
+        const val CAMERA_VIEW = "camera_view"
+        const val REMOTE_VIEW = "remote_view"
+        const val SETTINGS_VIEW = "settings_view"
+    }
+}

app/src/main/java/com/example/tvcontroller/ui/views/RemoteViewModel.kt

@@ -3,6 +3,7 @@ package com.example.tvcontroller.ui.views
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
+import com.example.tvcontroller.data.RemoteCommand
 import com.example.tvcontroller.services.BluetoothService
 import com.example.tvcontroller.services.ControllerService
 import kotlinx.coroutines.Dispatchers
@@ -12,8 +13,10 @@ import org.json.JSONObject
 class RemoteViewModel(
     private val controllerService: ControllerService
 ) : ViewModel() {
+    private val commands = mutableMapOf<String, RemoteCommand>()
 
-    fun sendCommand(command: String) {
+    fun sendCommand(commandType: String) {
+        val command = commands[commandType]?: return
         viewModelScope.launch(Dispatchers.IO) {
             controllerService.sendCommand(command)
         }

app/src/main/java/com/example/tvcontroller/ui/views/SettingsView.kt

@@ -9,7 +9,6 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
-import androidx.compose.material3.Button
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
@@ -31,11 +30,10 @@ import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
 import com.example.tvcontroller.R
-import com.example.tvcontroller.Settings
-import com.example.tvcontroller.ui.views.SettingsViewModel.Companion.CONNECT_CONTROLLER_VIEW
-import com.example.tvcontroller.ui.views.SettingsViewModel.Companion.MAIN_SETTINGS_VIEW
 import com.example.tvcontroller.services.BluetoothService
 import com.example.tvcontroller.services.DeviceService
+import com.example.tvcontroller.ui.views.SettingsViewModel.Companion.CONNECT_CONTROLLER_VIEW
+import com.example.tvcontroller.ui.views.SettingsViewModel.Companion.MAIN_SETTINGS_VIEW
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -178,10 +176,12 @@ fun SettingsView(
 }
 
 @Composable
-fun getConnectionStateString(state: Settings.ConnectionState): String {
+fun getConnectionStateString(state: String): String {
     return when (state) {
-        Settings.ConnectionState.Unregistered -> stringResource(id = R.string.connection_state_unregistered)
+        DeviceService.STATUS_UNREGISTERED -> stringResource(id = R.string.connection_state_unregistered)
-        Settings.ConnectionState.Registered -> stringResource(id = R.string.connection_state_registered)
+        DeviceService.STATUS_REGISTERED -> stringResource(id = R.string.connection_state_registered)
+        DeviceService.STATUS_CONNECTED -> stringResource(id = R.string.connection_state_connected)
+        else -> "Unknown"
     }
 }
 

app/src/main/java/com/example/tvcontroller/ui/views/SettingsViewModel.kt

@@ -8,7 +8,6 @@ import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
-import com.example.tvcontroller.Settings
 import com.example.tvcontroller.data.BluetoothDevice
 import com.example.tvcontroller.services.BluetoothService
 import com.example.tvcontroller.services.DeviceService
@@ -27,7 +26,7 @@ class SettingsViewModel(
         private set
     var registrationCode by mutableStateOf("")
         private set
-    var connectionState by mutableStateOf(Settings.ConnectionState.Unregistered)
+    var connectionState by mutableStateOf(deviceService.status)
         private set
     var bluetoothConnectionState by mutableStateOf(bluetoothService.state)
         private set
@@ -45,10 +44,10 @@ class SettingsViewModel(
             currentBluetoothDevice = bluetoothService.currentDevice
             bluetoothConnectionState = it
         }
+        deviceService.onStatusChanged { connectionState = it }
     }
 
     fun connect() {
-        //Log.i("SettingsScreen", "Save settings: $serverUrl, $deviceName, $registrationCode")
         viewModelScope.launch {
             deviceService.serverAddress = serverAddress
             deviceService.registerIntegration(deviceName, registrationCode)
@@ -59,21 +58,15 @@ class SettingsViewModel(
 
     private fun updateConnectionState() {
         Log.i(TAG, "Device token: ${deviceService.token}")
-        connectionState = if (deviceService.token.isEmpty()) {
+        connectionState = deviceService.status
-            Settings.ConnectionState.Unregistered
-        } else {
-            Settings.ConnectionState.Registered
-        }
     }
 
     private suspend fun updateDeviceInfo() {
-        if (connectionState == Settings.ConnectionState.Unregistered) return
+        if (connectionState == DeviceService.STATUS_UNREGISTERED) return
         val integration = deviceService.getIntegration()
-        if (integration == null) {
+        integration?.let {
-            connectionState = Settings.ConnectionState.Unregistered
+            deviceName = it.name
-            return
         }
-        deviceName = integration.name
     }
 
     fun connectBluetoothDevice(device: BluetoothDevice) {

app/src/main/res/values/strings.xml

@@ -21,4 +21,5 @@
     <string name="bluetooth_state_connected">connected</string>
     <string name="bluetooth_state_disconnected">disconnected</string>
     <string name="disconnect_button_label">Disconnect</string>
+    <string name="connection_state_connected">connected</string>
 </resources>