Modified the logic in dlnasrc so it can operate in a "passthru-mode" so it can be hooked into the pipeline after appsrc.  It will be a bin with one element - dtcpip.  The dlnasrc will have a sink pad so it can receive seek events and get the rate and requested format which is not available through appsrc callback.  The dlnasrc will take care of setting up the dtcpip element so the logic to get the dtcpip host and port is no longer needed.