[asterisk-dev] Accessing next frames via jitterbuffer

[Todd Mortimer]

Hello,

I am wondering if it is possible for a translator module to access subsequent frames from the jitter buffer. The reason I ask is because I have been working on a SILK translator:

https://github.com/mordak/codec_silk

And am interested in implementing the SILK FEC, which puts redundant information about frame (n) in the (n+1) and (n+2) frames. I've done some looking on this mailing list and searched the web some but have not seen any examples of how to do this, and am hoping that someone can point me in the right direction.

Looking at ast_frame->frame_list leads me to believe that I might be able to access the next frame(s) through there, but I am not sure. I understand that the jb will indicate to the translator that it needs to generate a missing frame by passing a frame with datalen = 0, but am not sure how to optionally check for subsequent frames from within the _framein or _frameout functions in a translator.

Can someone point me in the right direction?

Thank you,
Todd