Creating the SDP Session Structure
The first step in creating a new SDP session structure is allocating
memory for the new structure by calling the sdp_new_session
()
function.
This function returns a pointer to the new session structure. The other functions
in this section use that pointer to construct the new session structure. Once
you are done constructing the new session structure, convert it to a string
representation with the sdp_session_to_str
()
function.