Android sip stack with codec manipulation support?

Question

I have been looking for some framework for an android device that enables the reInvite method over the SIP protocol. My utter goal is to be able to switch codecs while in call. I have tried to do so with some existing libraries but i have come to a dead-end. I have tried to use SipDroid which has a set_codec() method but I haven't managed to find any decent documentation about that. I have also tried with the native android.net.sip library but I didn't seem to find out how to change them there either... Does anyone have any advice on such a library that supports reInvite in the way I have described, or any tips on using the libraries I have mentioned? Thank you in advance...

ps : I have tried using mobicents and asterisk as servers..

Answer 1

If you Google you will find several free SIP stacks for Android, most of them are based on "C++\C" code - examples pjsip and linphone.