v1.0Final - Comprehensive DirectInput Force Feedback & Input System Overhaul

Implements a complete runtime and editor-based input management system with DirectInput Force Feedback support and IL2CPP compatibility.

 Core Changes:

 - Added Logitech SDK logics
 - Added runtime configuration UIs (F2: Input Mapping, F3: FFB Settings)
 - Implemented IL2CPP callback support with proper __stdcall convention
 - Added input mapping cache with duplicate protection
 - Integrated real-time device detection and configuration

 Technical Improvements:

 - Enhanced error handling and device connection management
 - Implemented proper FFB effect cleanup and memory management
 - Added DBTEvents enum support (0x0007, 0x8000, 0x8004)
 - Streamlined save/load system with PlayerPrefs persistence
 - Fixed IL2CPP NotSupportedException in Windows builds

 The update provides a complete runtime alternative to editor-only configuration,
 enabling both FFB and input mapping adjustments during gameplay while ensuring
 proper IL2CPP support for production builds.
 Core Changes:
 - Added Logitech SDK logics
 - Added runtime configuration UIs (F2: Input Mapping, F3: FFB Settings)
 - Implemented IL2CPP callback support with proper __stdcall convention
 - Added input mapping cache with duplicate protection
 - Integrated real-time device detection and configuration

 Technical Improvements:
 - Enhanced error handling and device connection management
 - Implemented proper FFB effect cleanup and memory management
 - Added DBTEvents enum support (0x0007, 0x8000, 0x8004)
 - Streamlined save/load system with PlayerPrefs persistence
 - Fixed IL2CPP NotSupportedException in Windows builds

 The update provides a complete runtime alternative to editor-only configuration,
 enabling both FFB and input mapping adjustments during gameplay while ensuring
 proper IL2CPP support for production builds.

Author: imDanoush

.gitignore

@@ -77,7 +77,7 @@ sysinfo.txt
 # Builds
 *.apk
 *.aab
-*.unitypackage
+#.unitypackage
 
 # Crashlytics generated file
 crashlytics-build.properties

DirectInput-SampleScene.unitypackage

@@ -13,7 +13,7 @@ std::map   < DeviceGUID, std::vector<DIDEVICEOBJECTINSTANCE> >          _DeviceF
 std::map   < DeviceGUID, std::map<Effects::Type, DIEFFECT> >            _DeviceFFBEffectConfig;   // Effect Configuration
 std::map   < DeviceGUID, std::map<Effects::Type, LPDIRECTINPUTEFFECT> > _DeviceFFBEffectControl;  // Handle to Start/Stop Effect
 
-DeviceChangeCallback _DeviceChangeCallback; // External function to invoke on device change
+DeviceChangeCallback g_deviceCallback = nullptr;
 
 std::vector<std::wstring> DEBUGDATA; // Used for Debugging during development
 
@@ -595,7 +595,7 @@ HRESULT StopAllFFBEffects(LPCSTR guidInstance) {
 }
 
 void SetDeviceChangeCallback(DeviceChangeCallback CB) {
-	_DeviceChangeCallback = CB;
+	g_deviceCallback = CB;
 }
 
 // Generate SAFEARRAY of DEBUG data
@@ -702,34 +702,18 @@ BOOL CALLBACK _EnumFFBAxisCallback(const DIDEVICEOBJECTINSTANCE* ObjectInst, LPV
 }
 
 LRESULT _WindowsHookCallback(int code, WPARAM wParam, LPARAM lParam) {
-	if (code < 0) return CallNextHookEx(NULL, code, wParam, lParam); // invalid code skip
+	if (code < 0) return CallNextHookEx(NULL, code, wParam, lParam);
 
-	// check if device was added/removed
 	PCWPSTRUCT pMsg = PCWPSTRUCT(lParam);
 	if (pMsg->message == WM_DEVICECHANGE) {
-		if (_DeviceChangeCallback) { _DeviceChangeCallback((int)pMsg->wParam); } // If callback assigned, invoke it
-		//switch (pMsg->wParam) {
-		//  case DBT_DEVNODES_CHANGED:
-		//    DEBUGDATA.push_back(L"Changed!");
-		//    // TODO: Invoke Callback
-		//    //if (_DeviceChangeCallback) { _DeviceChangeCallback(1); }
-		//    break;
-		//  case DBT_DEVICEARRIVAL:
-		//    DEBUGDATA.push_back(L"Arrival!");
-		//    // TODO: Invoke Callback
-		//    break;
-		//  case DBT_DEVICEREMOVECOMPLETE:
-		//    DEBUGDATA.push_back(L"Remove!");
-		//    // TODO: Invoke Callback
-		//    break;
-		//  default:
-		//    DEBUGDATA.push_back(L"Other!");
-		//    break;
-		//}
+		if (g_deviceCallback) {
+			g_deviceCallback(static_cast<DBTEvents>(pMsg->wParam));
+		}
 	}
-	return CallNextHookEx(NULL, code, wParam, lParam); // Continue to next hook
+	return CallNextHookEx(NULL, code, wParam, lParam);
 }
 
+
 //////////////////////////////////////////////////////////////
 // Helper Functions
 //////////////////////////////////////////////////////////////

DirectInputExplorer~/DirectInputExplorer/bin/Debug/net5.0-windows/DirectInputExplorer.dll

@@ -95,12 +95,19 @@ extern "C" { // Everything to be made available by the DLL
   DIRECTINPUTFORCEFEEDBACK_API HRESULT              DestroyFFBEffect(LPCSTR guidInstance, Effects::Type effectType);
   DIRECTINPUTFORCEFEEDBACK_API HRESULT              UpdateFFBEffect(LPCSTR guidInstance, Effects::Type effectType, DICONDITION* conditions);
   DIRECTINPUTFORCEFEEDBACK_API HRESULT              StopAllFFBEffects(LPCSTR guidInstance);
-
-  typedef void(__stdcall* DeviceChangeCallback)(int);
-  DIRECTINPUTFORCEFEEDBACK_API void                 SetDeviceChangeCallback(DeviceChangeCallback CB);
-
-
   DIRECTINPUTFORCEFEEDBACK_API HRESULT              DEBUG1(LPCSTR guidInstance, /*[out]*/ SAFEARRAY** DebugData);
+  extern "C" { // Everything to be made available by the DLL
+      enum DBTEvents {
+          DBTDEVNODESCHANGED = 0x0007,
+          DBTDEVICEARRIVAL = 0x8000,
+          DBTDEVICEREMOVECOMPLETE = 0x8004
+      };
+      typedef void(__stdcall* DeviceChangeCallback)(DBTEvents state);
+
+      extern DeviceChangeCallback g_deviceCallback;
+
+      DIRECTINPUTFORCEFEEDBACK_API void SetDeviceChangeCallback(DeviceChangeCallback CB);
+  }
 }
 
 

DirectInputExplorer~/DirectInputExplorer/bin/Debug/net5.0-windows/DirectInputExplorer.exe

@@ -47,6 +47,13 @@ class Native
     }
     public class DIManager
     {
+        // Define all callback delegates at class level with proper attributes
+        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
+        private delegate void DeviceChangeCallback(DBTEvents DBTEvent);
+
+        // Static delegate instances to prevent garbage collection
+        private static DeviceChangeCallback s_deviceChangeCallback;
+
         //////////////////////////////////////////////////////////////
         // Cross Platform "Macros" - Allows lib to work in Visual Studio & Unity
         //////////////////////////////////////////////////////////////
@@ -92,9 +99,18 @@ public class DIManager
         public static bool Initialize()
         {
             if (_isInitialized) { return _isInitialized; }
-            if (Native.StartDirectInput() != 0) { return _isInitialized = false; }
-            Native.SetDeviceChangeCallback(OnDeviceChange);
-            return _isInitialized = true;
+            try
+            {
+                if (Native.StartDirectInput() != 0) { return _isInitialized = false; }
+                s_deviceChangeCallback = OnDeviceChange;
+                Native.SetDeviceChangeCallback(OnDeviceChange);
+                return _isInitialized = true;
+            }
+            catch (Exception ex)
+            {
+                DebugLog($"Failed to initialize DirectInput: {ex.Message}");
+                return _isInitialized = false;
+            }
         }
 
         /// <summary>
@@ -438,6 +454,9 @@ public static bool GetADI(string guidInstance, out ActiveDeviceInfo ADI)
         /// Called from the DLL when a windows WM_DEVICECHANGE event is captured
         /// This function invokes the necessary events
         /// </summary>
+#if UNITY_STANDALONE_WIN
+        [AOT.MonoPInvokeCallback(typeof(DeviceChangeCallback))]
+#endif
         private static void OnDeviceChange(DBTEvents DBTEvent)
         {
             //DebugLog($"DeviceChange {DBTEvent.ToString()}");