Ticket #919:
 - Added default ilbc mode into codec passthrough setting.
 - Added iLBC mode 'negotiation' in iLBC codec_open().
 - Updated stream_create() to prioritize codec_open(), that may update the codec params, over stream initializations involving codec params.



git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2834 74dad513-b988-da41-8d7b-12977e46ad98
5 files changed