Initialize Android playback before handling its first media packet

tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamPlayerEngine.kt

@@ -74,6 +74,16 @@ class StreamPlayerEngine(private val group: Long, private val source: Long, priv
         val info = MediaCodec.BufferInfo()
         var clockState: LongArray? = null
 
+        fun observeStatus(meta: LongArray?) {
+            if (meta == null || meta[5] and 1 == 0L) return
+            ready = if (localPreview != null) meta[1] else meta[0]
+            if (playback != 0L) return
+            audioEnabled = localPreview == null && meta[5] and 2 != 0L
+            playback = NativeLib.streamPlaybackCreate(id, meta[3], audioEnabled)
+            check(playback != 0L); position = meta[3]; generation = meta[4]
+            LogManager.addLog("INFO", "stream", "playback starts id=$id PTS=$position generation=$generation fixedPrefill=0")
+        }
+
         fun resetVideo() {
             try { decoder?.stop(); decoder?.release() }
             catch (e: Exception) { LogManager.addLog("WARN", "video", "decoder reset id=$id: ${e.message}") }
@@ -128,16 +138,7 @@ class StreamPlayerEngine(private val group: Long, private val source: Long, priv
             check(NativeLib.streamOpen(id, group, source, audio = localPreview == null, epoch = epoch)) { "Viewer open refused" }
             while (running && surface.isValid) {
                 check(NativeLib.isReady()) { "Core stopped" }
-                val meta = NativeLib.streamStatus(id)
-                if (meta != null && meta[5] and 1 != 0L) {
-                    ready = if (localPreview != null) meta[1] else meta[0]
-                    if (playback == 0L) {
-                        audioEnabled = localPreview == null && meta[5] and 2 != 0L
-                        playback = NativeLib.streamPlaybackCreate(id, meta[3], audioEnabled)
-                        check(playback != 0L); position = meta[3]; generation = meta[4]
-                        LogManager.addLog("INFO", "stream", "playback starts id=$id PTS=$position generation=$generation fixedPrefill=0")
-                    }
-                }
+                observeStatus(NativeLib.streamStatus(id))
                 val now = System.nanoTime()
                 val played = playedFrames(now)
                 val deviceLead = (written - played).coerceAtLeast(0) * 1_000_000 / 48000
@@ -153,6 +154,7 @@ class StreamPlayerEngine(private val group: Long, private val source: Long, priv
                     val broadcastRotation = b.short.toInt() and 65535; val pts = b.long; val size = b.int
                     val revision = b.int.toLong() and 0xffffffffL
                     check(size == b.remaining())
+                    if (kind in 1..2 && playback == 0L) observeStatus(NativeLib.streamStatus(id))
                     when (kind) {
                         1 -> {
                             val camera = localPreview?.camera(revision)