[Vorbis-dev] naive questions about vorbis

[sylvain zorman]

Hi, I am a student, and I am developing tools for VoIP.
I am looking for C++ functions that can evaluate the noise level, the 
energy mean, and delay between a perfect sound and a sound that have 
passed through the VoIP system.
Does vorbis contains those functions by default?
What are the codec supported by those libraries?
Thank you for your response and for any kind of advise.