show info box for audio calls

src/audio_call.h

@@ -26,6 +26,9 @@
 #include <tox/toxav.h>
 
 #include "device.h"
+#include "windows.h"
+
+#define VAD_THRESHOLD_DEFAULT 40.0
 
 typedef enum _AudioError {
     ae_None = 0,
@@ -34,7 +37,6 @@ typedef enum _AudioError {
     ae_StartingCoreAudio = 1 << 2
 } AudioError;
 
-
 /* You will have to pass pointer to first member of 'windows'
  * declared in windows.c otherwise undefined behaviour will
  */
@@ -44,5 +46,4 @@ void terminate_audio();
 int start_transmission(ToxWindow *self);
 int stop_transmission(int call_index);
 
-
 #endif /* _audio_h */