+static GstFlowReturn gst_rtp_session_chain_recv_rtp (GstPad * pad,
+ GstObject * parent, GstBuffer * buffer);
+static GstFlowReturn gst_rtp_session_chain_recv_rtcp (GstPad * pad,
+ GstObject * parent, GstBuffer * buffer);
+static GstFlowReturn gst_rtp_session_chain_send_rtp (GstPad * pad,
+ GstObject * parent, GstBuffer * buffer);
+static GstFlowReturn gst_rtp_session_chain_send_rtp_list (GstPad * pad,
+ GstObject * parent, GstBufferList * list);