Avoid unnecessary reinitialization of PS4/PS5 gamepads during stream exit

onInputDeviceChanged() is triggered by starting/stopping pointer capture, so we should
unregister our callbacks before that happens to avoid triggering several gamepad context
reinitializations right as the stream is exiting

app/src/main/java/com/limelight/Game.java

@@ -495,7 +495,6 @@ public class Game extends Activity implements SurfaceHolder.Callback,
         keyboardTranslator = new KeyboardTranslator();
 
         InputManager inputManager = (InputManager) getSystemService(Context.INPUT_SERVICE);
-        inputManager.registerInputDeviceListener(controllerHandler, null);
         inputManager.registerInputDeviceListener(keyboardTranslator, null);
 
         // Initialize touch contexts
@@ -1079,12 +1078,11 @@ public class Game extends Activity implements SurfaceHolder.Callback,
     protected void onDestroy() {
         super.onDestroy();
 
-        InputManager inputManager = (InputManager) getSystemService(Context.INPUT_SERVICE);
         if (controllerHandler != null) {
-            inputManager.unregisterInputDeviceListener(controllerHandler);
             controllerHandler.destroy();
         }
         if (keyboardTranslator != null) {
+            InputManager inputManager = (InputManager) getSystemService(Context.INPUT_SERVICE);
             inputManager.unregisterInputDeviceListener(keyboardTranslator);
         }
 
@@ -1104,6 +1102,21 @@ public class Game extends Activity implements SurfaceHolder.Callback,
         inputCaptureProvider.destroy();
     }
 
+    @Override
+    protected void onPause() {
+        if (isFinishing()) {
+            // Stop any further input device notifications before we lose focus (and pointer capture)
+            if (controllerHandler != null) {
+                controllerHandler.stop();
+            }
+
+            // Ungrab input to prevent further input device notifications
+            setInputGrabState(false);
+        }
+
+        super.onPause();
+    }
+
     @Override
     protected void onStop() {
         super.onStop();
@@ -2310,6 +2323,9 @@ public class Game extends Activity implements SurfaceHolder.Callback,
                 // Let the display go to sleep now
                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
 
+                // Stop processing controller input
+                controllerHandler.stop();
+
                 // Ungrab input
                 setInputGrabState(false);
 

app/src/main/java/com/limelight/binding/input/ControllerHandler.java

@@ -114,6 +114,7 @@ public class ControllerHandler implements InputManager.InputDeviceListener, UsbD
     private final double stickDeadzone;
     private final InputDeviceContext defaultContext = new InputDeviceContext();
     private final GameGestures gestures;
+    private final InputManager inputManager;
     private final Vibrator deviceVibrator;
     private final VibratorManager deviceVibratorManager;
     private final SensorManager deviceSensorManager;
@@ -134,6 +135,7 @@ public class ControllerHandler implements InputManager.InputDeviceListener, UsbD
         this.prefConfig = prefConfig;
         this.deviceVibrator = (Vibrator) activityContext.getSystemService(Context.VIBRATOR_SERVICE);
         this.deviceSensorManager = (SensorManager) activityContext.getSystemService(Context.SENSOR_SERVICE);
+        this.inputManager = (InputManager) activityContext.getSystemService(Context.INPUT_SERVICE);
         this.mainThreadHandler = new Handler(Looper.getMainLooper());
 
         // Create a HandlerThread to process battery state updates. These can be slow enough
@@ -205,6 +207,9 @@ public class ControllerHandler implements InputManager.InputDeviceListener, UsbD
         // currentControllers set which will allow them to properly unplug
         // if they are removed.
         initialControllers = getAttachedControllerMask(activityContext);
+
+        // Register ourselves for input device notifications
+        inputManager.registerInputDeviceListener(this, null);
     }
 
     private static InputDevice.MotionRange getMotionRangeForJoystickAxis(InputDevice dev, int axis) {
@@ -260,9 +265,16 @@ public class ControllerHandler implements InputManager.InputDeviceListener, UsbD
     }
 
     public void stop() {
+        if (stopped) {
+            return;
+        }
+
         // Stop new device contexts from being created or used
         stopped = true;
 
+        // Unregister our input device callbacks
+        inputManager.unregisterInputDeviceListener(this);
+
         for (int i = 0; i < inputDeviceContexts.size(); i++) {
             InputDeviceContext deviceContext = inputDeviceContexts.valueAt(i);
             deviceContext.destroy();

app/src/main/java/com/limelight/binding/input/capture/AndroidNativePointerCaptureProvider.java

@@ -65,6 +65,9 @@ public class AndroidNativePointerCaptureProvider extends AndroidPointerIconCaptu
     public void showCursor() {
         super.showCursor();
 
+        // It is important to unregister the listener *before* releasing pointer capture,
+        // because releasing pointer capture can cause an onInputDeviceChanged() callback
+        // for devices with a touchpad (like a DS4 controller).
         inputManager.unregisterInputDeviceListener(this);
         targetView.releasePointerCapture();
     }