Use AudioTrack for headsets whose physical MMAP routing is unreliable

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

@@ -72,7 +72,12 @@ internal class CallAudioOutput private constructor(
 
     companion object {
         fun open(manager: AudioManager, deviceId: Int, tryFast: Boolean): CallAudioOutput {
-            if (tryFast && Build.VERSION.SDK_INT >= 31) {
+            val type = if (Build.VERSION.SDK_INT >= 31)
+                manager.availableCommunicationDevices.firstOrNull { it.id == deviceId }?.type else null
+            // Samsung MMAP подтверждает wired headset в HAL, но звук остаётся в speaker.
+            // Быстрый backend включаем только для проверенного физического выхода; гарнитуры ведёт AudioTrack.
+            val fastRoute = type == AudioDeviceInfo.TYPE_BUILTIN_SPEAKER
+            if (tryFast && fastRoute && Build.VERSION.SDK_INT >= 31) {
                 val handle = CallOutputNative.open(deviceId)
                 if (handle != 0L) return CallAudioOutput(null, handle, manager).also { CallOutputNative.sample(handle, it.sample) }
             }
@@ -86,7 +91,7 @@ internal class CallAudioOutput private constructor(
                 .setBufferSizeInBytes((min * 2).coerceAtLeast(3840)).setTransferMode(AudioTrack.MODE_STREAM)
                 .setPerformanceMode(AudioTrack.PERFORMANCE_MODE_LOW_LATENCY).build()
             if (track.state != AudioTrack.STATE_INITIALIZED) { track.release(); error("AudioTrack not initialized") }
-            LogManager.addLog("INFO", "CallAudio", "output fallback=AudioTrack device=$deviceId tryFast=$tryFast")
+            LogManager.addLog("INFO", "CallAudio", "output fallback=AudioTrack device=$deviceId type=$type tryFast=$tryFast fastRoute=$fastRoute")
             return CallAudioOutput(track, 0, manager)
         }
     }