> In general you can assume than these resamplers are already as > optimized as possible. Especially for our default speex resampler, I > don't expect there's a lot to gain. But if you'd like you could work > with that project to see if there are improvements possible. Last week > I sent some patches to speed up the trivial resampler, but that is > more of a toy-resampler, so not that important. Actually the default resampler isn't that optimized for standard use cases. It's very generic but a great deal of optimizations can be done for fixed conversion ratios (90% of the cases for mixing) by using predefined tables and a polyphase structure. We have something internally optimized with SSE intrinsics. I'd like to release that code at some point when I find the time to clean and merge in git master. Since this isn't exactly the top priority in my job description I don't have an ETA.
