[pulseaudio-discuss] detection of SSE3 support in configure.ac

Pierre-Louis Bossart pierre-louis.bossart at linux.intel.com
Mon Dec 5 09:17:48 PST 2011

I have an optimized SSE-based resampling library that I bolted in
PulseAudio. It was measured to bring a 2x speed-up over speex, mainly
because it uses fixed-tables instead of interpolations, the price being that
it can only be used for fixed-rate sinks/sources.
Since it's hardware-specific, I'd need a means to enable/disable it at
compile time, using some kind of voodoo magic in configure.ac. Does anyone
have pointers on SSE detection logic? To make things safe, I also detect SSE
at run time but would like to disable it completely for other non-x86 or
older platforms.

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