Initial Mic setup

src/core/frontend/mic.cpp

@@ -0,0 +1,23 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/frontend/mic.h"
+#include "core/hle/service/mic_u.h"
+
+namespace Frontend {
+
+static std::shared_ptr<Mic::Interface> current_mic;
+
+void RegisterMic(std::shared_ptr<Mic::Interface> mic) {
+    current_mic = mic;
+}
+
+std::shared_ptr<Mic::Interface> GetCurrentMic() {
+    if (!current_mic) {
+        current_mic = std::make_shared<Mic::NullMic>();
+    }
+    return current_mic;
+}
+
+} // namespace Frontend