10.05.2014 22:45, Peter Meerwald wrote: > >> When Speex is compiled with FIXED_POINT defined, it scales float input >> to ?32768 instead of ?1. In order to make floating point resampler >> work with speex compiled with FIXED_POINT, we need to rescale the input >> to speex. This rescaling does not hurt normal speex, so we do it >> unconditionally. > > floating point multiplication is quite costly on some platforms, I'd > rather not force everyone to scale every sample twice for no good reason Well, on such platforms (*cough* ARM *cough*) I'd call it a bug to use speex-float-* resamplers by default, or even to provide them at all. If we fix that, then the extra multiplication in an already-very-slow path would no longer be relevant. -- Alexander E. Patrakov
