Operate on a raw block of memory, extract interesting fields from the
packet and create user-friendly struct for the SDES packet that
can be queried using SSRC
Caller must remember to free the memory occupied by the SDES items
PACKED_STRUCT is quite an ugly hack if it must be cross-platform
so better to process the incoming (and soon outgoing) RTCP data
as raw memory and craft user-friendly RTCP packets from those
memory blocks which do not including strict padding or truncated fields.
Having a 1100 lines long file is not manageable so split RTCP
code into different files by packet type and leave all the
session-related code to src/rtcp.cc
Aaro Altonen