[opus] How to negotiate 'Opus/Celt only'?

[Gregory Maxwell]

On Thu, Nov 14, 2013 at 12:51 AM, Fredrik Bonde <Fredrik.Bonde at ascom.se> wrote:
> 1.            Is it possible to via SDP force the remote party to send a
> specific mode of the 32 different possible modes or to force the remote side
> to use CELT only?

No, and if you cannot decode opus completely (all modes) your device
is not conformant with the Opus specification.

I'm confused about the MIPS limitation though. The LPC mode decoder is
_much_ faster than the MDCT mode decoder. Can you explain more about
this?