+gboolean ghb_cancel_encode(const gchar *extra_msg);
+GValue* ghb_start_next_job(signal_user_data_t *ud, gboolean find_first);
+void ghb_check_dependency(signal_user_data_t *ud, GtkWidget *widget);
+void ghb_do_scan(signal_user_data_t *ud, const gchar *filename, gboolean force);
+void ghb_log(gchar *log, ...);
+gpointer ghb_check_update(signal_user_data_t *ud);