Close #1568:
 - Added media change detection based on SDP negotiation result and local codec param settings, the detection result will decide whether the media should be re-initialized after the SDP negotiation.
 - Fixed stream to keep the duplicate of codec param for the stream info (was only copying the pointer).
 - Introduced macro PJSUA_THIRD_PARTY_STREAM_HAS_GET_INFO & PJSUA_THIRD_PARTY_STREAM_HAS_GET_STAT.




git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@4254 74dad513-b988-da41-8d7b-12977e46ad98
8 files changed