fix NullReferenceException in InputRemoting (#831)

Author: karasusan

WebApp/client/src/inputdevice.js

@@ -43,7 +43,7 @@ export class InputDevice {
    * name;
    * layout;
    * deviceId;
-   * variants;
+   * usages;
    * description;
    *
    * _inputState;
@@ -54,14 +54,14 @@ export class InputDevice {
    * @param {Number} name
    * @param {String} layout
    * @param {Number} deviceId
-   * @param {String} variants
+   * @param {String[]} usages
    * @param {Object} description
    */
-  constructor(name, layout, deviceId, variants, description) {
+  constructor(name, layout, deviceId, usages, description) {
     this.name = name;
     this.layout = layout;
     this.deviceId = deviceId;
-    this.variants = variants;
+    this.usages = usages;
     this.description = description;
 
     this._inputState = null;

WebApp/client/src/sender.js

@@ -38,7 +38,7 @@ export class Sender extends LocalInputManager {
       m_Version: "",
       m_Capabilities: ""
     };
-    this.mouse = new Mouse("Mouse", "Mouse", 1, "", descriptionMouse);
+    this.mouse = new Mouse("Mouse", "Mouse", 1, null, descriptionMouse);
     this._devices.push(this.mouse);
 
     this._elem.addEventListener('click', this._onMouseEvent.bind(this), false);
@@ -58,7 +58,7 @@ export class Sender extends LocalInputManager {
       m_Version: "",
       m_Capabilities: ""
     };
-    this.keyboard = new Keyboard("Keyboard", "Keyboard", 2, "", descriptionKeyboard);
+    this.keyboard = new Keyboard("Keyboard", "Keyboard", 2, null, descriptionKeyboard);
     this._devices.push(this.keyboard);
 
     document.addEventListener('keyup', this._onKeyEvent.bind(this), false);
@@ -75,7 +75,7 @@ export class Sender extends LocalInputManager {
       m_Version: "",
       m_Capabilities: ""
     };
-    this.gamepad = new Gamepad("Gamepad", "Gamepad", 3, "", descriptionGamepad);
+    this.gamepad = new Gamepad("Gamepad", "Gamepad", 3, null, descriptionGamepad);
     this._devices.push(this.gamepad);
 
     window.addEventListener("gamepadconnected", this._onGamepadEvent.bind(this), false);
@@ -94,7 +94,7 @@ export class Sender extends LocalInputManager {
       m_Version: "",
       m_Capabilities: ""
     };
-    this.touchscreen = new Touchscreen("Touchscreen", "Touchscreen", 4, "", descriptionTouch);
+    this.touchscreen = new Touchscreen("Touchscreen", "Touchscreen", 4, null, descriptionTouch);
     this._devices.push(this.touchscreen);
 
     this._elem.addEventListener('touchend', this._onTouchEvent.bind(this), false);

com.unity.renderstreaming/Runtime/Scripts/InputSystem/InputRemoting.cs

@@ -653,8 +653,9 @@ public static void Process(InputRemoting Receiver, Message msg)
                 var deviceFlagsRemote = 1 << 3;
                 device.SetDeviceFlags(device.GetDeviceFlags() | deviceFlagsRemote);
 
-                foreach (var usage in data.usages)
-                    Receiver.m_LocalManager.AddDeviceUsage(device, usage);
+                if(data.usages != null)
+                    foreach (var usage in data.usages)
+                        Receiver.m_LocalManager.AddDeviceUsage(device, usage);
 
                 // Remember it.
                 var record = new RemoteInputDevice