Windows: add support DirectInput gamepads (devices);

Windows/DinputDevice.h

@@ -0,0 +1,35 @@
+// Copyright (c) 2012- PPSSPP Project.
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 2.0 or later versions.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official git repository and contact information can be found at
+// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
+
+#pragma once
+#define DIRECTINPUT_VERSION 0x0800
+#include "InputDevice.h"
+#include "dinput.h"
+
+class DinputDevice :
+	public InputDevice
+{
+public:
+	DinputDevice();
+	~DinputDevice();
+	virtual int UpdateState(InputState &input_state);
+private:
+	LPDIRECTINPUT8			pDI;
+	LPDIRECTINPUTDEVICE8    pJoystick;
+	bool					analog;
+};
+