Prevent use of audio drivers and ports, also unwanted

Signed-off-by: falkTX <falktx@falktx.com>

include/audio.hpp

@@ -0,0 +1,30 @@
+/*
+ * DISTRHO Cardinal Plugin
+ * Copyright (C) 2021-2022 Filipe Coelho <falktx@falktx.com>
+ *
+ * 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; either version 3 of
+ * the License, or any later version.
+ *
+ * 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 for more details.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE file.
+ */
+
+#pragma once
+
+namespace rack {
+namespace audio {
+
+
+/* NOTE all the audio stuff (drivers, ports etc) is purposefully missing here, unwanted in Cardinal
+ */
+struct Port;
+
+
+} // namespace audio
+} // namespace rack