[pulseaudio-discuss] [PATCH v2] resampler: Support speex resampler compiled with FIXED_POINT

Laurențiu Nicola lnicola at dend.ro
Sat May 10 11:17:48 PDT 2014

To be fair, my testing conditions are not really idea, so I'm not sure
how accurate my number is. For example, if I use speex-fixed-10, CPU
usage doesn't seem too high, but I get underruns for a few seconds, then
the CPU gets lower (to around 10%) and sound is fine for a while.

I suppose this is some kind of  feedback loop that includes
module-rtp-recv. That module uses the resampler to adjust for the clock
rate skew; to make things worse, the latency on my network is pretty

I could try plugging in a network cable, but I don't know a better way
to test the performance.

Laurentiu Nicola

On Sat, May 10, 2014, at 20:53, Alexander E. Patrakov wrote:
> 10.05.2014 23:37, Laurențiu Nicola wrote:
> > Sorry for barging in on this, but is there a way to run a benchmark on
> > all the resamplers included in PulseAudio? For me, both speex-float-6
> > and speex-fixed-6 eat around 40% CPU.
> Congratulations for being a perfect mind-reader. I was going to ask the 
> same question in 
> http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-May/020624.html 
> - and you already have an answer. So, based on your benchmark, if others 
> confirm it, let's just kill speex-float on all platforms.
> -- 
> Alexander E. Patrakov
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