Implementa pausa diretta con copertina slate e ripresa.

Metti in pausa ferma RTMP lato app mantenendo la camera aperta, MediaMTX
manda offline.mp4 agli spettatori e Chiudi termina definitivamente.

Co-authored-by: Cursor <cursoragent@cursor.com>

mobile/android/app/src/main/kotlin/com/matchlivetv/match_live_tv/StreamingEngine.kt

@@ -88,6 +88,7 @@ class StreamingEngine(
     private var lastFpsSampleAtMs: Long = 0L
     private val reconnectAttempts = AtomicInteger(0)
     private val isReleased = AtomicBoolean(false)
+    private val pausingIntentionally = AtomicBoolean(false)
 
     private val bitrateAdapter = BitrateAdapter { adaptedBitrate ->
         genericStream?.setVideoBitrateOnFly(adaptedBitrate)
@@ -235,6 +236,33 @@ class StreamingEngine(
         startMetricsLoop()
     }
 
+    fun pauseStream() {
+        ensureMainThread()
+        if (state != StreamingState.STREAMING &&
+            state != StreamingState.CONNECTING &&
+            state != StreamingState.RECONNECTING
+        ) {
+            return
+        }
+
+        stopMetricsLoop()
+        pausingIntentionally.set(true)
+        genericStream?.let { stream ->
+            if (stream.isStreaming) {
+                stream.stopStream()
+            }
+        }
+        pausingIntentionally.set(false)
+
+        streamStartedAtMs = 0L
+        currentBitrateKbps = 0L
+        currentFps = 0
+        reconnectAttempts.set(0)
+        attachPreviewToStream()
+        updateState(StreamingState.PREVIEWING)
+        startMetricsLoop()
+    }
+
     fun stopStream() {
         ensureMainThread()
         if (state == StreamingState.IDLE || state == StreamingState.STOPPING) {
@@ -291,6 +319,9 @@ class StreamingEngine(
 
     override fun onConnectionFailed(reason: String) {
         postMain {
+            if (pausingIntentionally.get()) {
+                return@postMain
+            }
             lastError = reason
             val stream = genericStream ?: return@postMain
             val currentConfig = config ?: return@postMain
@@ -328,6 +359,9 @@ class StreamingEngine(
 
     override fun onDisconnect() {
         postMain {
+            if (pausingIntentionally.get()) {
+                return@postMain
+            }
             if (state == StreamingState.STREAMING || state == StreamingState.RECONNECTING) {
                 updateState(StreamingState.RECONNECTING, "disconnected")
             }

mobile/android/app/src/main/kotlin/com/matchlivetv/match_live_tv/StreamingPlugin.kt

@@ -128,6 +128,7 @@ class StreamingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware, EventCh
         when (call.method) {
             "startStream" -> startStream(call, result)
             "stopStream" -> stopStream(result)
+            "pauseStream" -> pauseStream(result)
             "getMetrics" -> getMetrics(result)
             "startPreview" -> startPreview(result)
             "stopPreview" -> stopPreview(result)
@@ -203,6 +204,11 @@ class StreamingPlugin : FlutterPlugin, MethodCallHandler, ActivityAware, EventCh
         result.success(true)
     }
 
+    private fun pauseStream(result: Result) {
+        getEngine()?.pauseStream()
+        result.success(true)
+    }
+
     private fun getMetrics(result: Result) {
         val metrics = boundService?.getMetrics()
             ?: getEngine()?.getMetrics()?.toMap()