-#include "ardour_ui.h"
-#include "gui_thread.h"
-#include "ardour/audio_buffer.h"
-#include "ardour/data_type.h"
-#include "ardour/chan_mapping.h"
-#include "ardour/session.h"
+#ifdef COMPILER_MSVC
+#include <float.h>
+/* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
+#define ISINF(val) !((bool)_finite((double)val))
+#define ISNAN(val) (bool)_isnan((double)val)
+#else
+#define ISINF(val) std::isinf((val))
+#define ISNAN(val) std::isnan((val))
+#endif