>Is the existing codeclib mdct being used now (which is already heavily optimised)? Or is optimisation lower down the priority list and/or mdct not the bottleneck?

We can't use the codeclib MDCT as Opus does not use power of 2 transforms. It uses its own FFT based on KISSFFT. Algorithmically its probably not too bad, but without ASM I imagine gcc makes a mess of it.
Received on 2012-08-16