[xiph-rtp] Merge all metadata in one single packet.

[Luca Barbato]

I'd like to merge all the 3 headers in one since the comment packet 
should be always empty or at least about 2 order lesser than the 
codebook size. That way should simplify the transmission logic a bit and 
  could make sense since codebook and setup should change together quite 
often. I'm a bit afraid about the comment changes, since they could be 
abused and really don't belong to the vorbis audio stream (and thus 
should be delivered with a different medium)

That way the metadata payload could be the same in the 3 possible medium 
"families": inline sdp, in band and off band.

To sum up:

- Just use one packet for all metadata

- Use the same packet layout for every vector (inline, inband, offband)

- Limit what should stay in the comment packet

Please send me some comments.

lu

-- 

Luca Barbato

Gentoo/linux Developer		Gentoo/PPC Operational Leader
http://dev.gentoo.org/~lu_zero