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[Didier Barvaux <question233909@xxxxxxxxxxxxxxxxxxxxx>]

Question #233909 on rohc changed:
https://answers.launchpad.net/rohc/+question/233909

    Status: Open => Needs information

Didier Barvaux requested more information:
> I want to implement a simple logic to check if there is feedback indeed:
>
> If (there is a feedback packet in local compressor & no piggyback available)
>   {send standalone feedback by using rohc_feedback_flush()}
> elseif (there is a feedback packet & there is reverse compressed-packet to send)
>   {send piggyback feedback by using rohc_decompress()}
> end
>
> My major concern is how to check if the feedback packet does exist. It is
> better not to change the library but to check it through API.

Your algorithm might simplified to:

   If (no piggyback available)
       {send standalone feedback by using rohc_feedback_flush()}
   elseif (there is reverse compressed-packet to send)
       {send piggyback feedback by using rohc_decompress()}
   end

So, it looks like you don't need a way to check if a not-yet-sent
feedback packet is stored in the compressor ;-)

Joke aside, the algorithm you described is probably incomplete or
simplified. If the full algo requires the information, we can extend the
library API to add a new function. But first tell me what is your full
algorithm so that we could design the function the best way.

Regards,
Didier

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