[HID/Linux] Implement cross platform controller input using SDL2 library.

src/xenia/hid/sdl/sdl_hid.h

@@ -0,0 +1,27 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2020 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_HID_SDL_SDL_HID_H_
+#define XENIA_HID_SDL_SDL_HID_H_
+
+#include <memory>
+
+#include "xenia/hid/input_system.h"
+
+namespace xe {
+namespace hid {
+namespace sdl {
+
+std::unique_ptr<InputDriver> Create(xe::ui::Window* window);
+
+}  // namespace sdl
+}  // namespace hid
+}  // namespace xe
+
+#endif  // XENIA_HID_SDL_SDL_HID_H_