void gstBusCall(GstBus *bus, GstMessage *msg);
static GstBusSyncReply gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data);
static void gstTextpadHasCAPS(GstPad *pad, GParamSpec * unused, gpointer user_data);
void gstBusCall(GstBus *bus, GstMessage *msg);
static GstBusSyncReply gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data);
static void gstTextpadHasCAPS(GstPad *pad, GParamSpec * unused, gpointer user_data);