21 #ifndef ENGINECALLBACKS_H 22 #define ENGINECALLBACKS_H 36 void destroy_notify(gpointer data);
39 bus_message_received(GstBus* bus, GstMessage* msg, gpointer data);
43 bus_state_changed(GstBus* bus, GstMessage* msg, gpointer data);
46 level_handler(GstBus* bus, GstMessage* message, gpointer data);
49 spectrum_handler(GstBus* bus, GstMessage* message, gpointer data);
53 #endif // ENGINECALLBACKS_H