20.11.2014 12:35, David Henningsson wrote: > Crossposting to Debian and upstream lists. > > Apparently Debian has a patch that uses fixed point by default on armhf, > so I'm just echoing Luke's question here: Has anybody performed any > testing or benchmarks across armhf hardware, w r t fixed point vs > floating point resampling with speex and PulseAudio? That patch has been superseded by this commit: http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=ac984f59d36ef555bc5b0df9af1cd48193d0d14f So, if you prefer a fixed-point resampler on armhf (or, for that matter, on any other architecture), just compile speex with --enable-fixed-point there. The benchmarking question is still open. > > Reference: > http://anonscm.debian.org/cgit/pkg-pulseaudio/pulseaudio.git/tree/debian/patches/0002-Use-the-fixed-point-speex-resampler-on-ARM.patch > > > On 2014-11-18 00:25, Luke Yelavich wrote: >> Hey folks. >> I'm starting to work on merging Ubuntu and Debian packaging for >> pulseaudio. One of the patches Debian currently has is to use fixed >> point on all arm flavours they support. The argument given is that >> float resampling doesn't necessarily perform better than fixed point >> resampling, even on hard float capable hardware, and sometimes it is >> worse. here is the blurb taken from the patch: >> >> Switch to use the speex fixed point resampler method by default on ARM. >> Traditionately there wasn't any standard floating point hardware, so for >> those machines it's an obvious choise. On machine using the hardfloat >> ABI floating point still isn't an obvious win over integer performance, >> it's of equal performance on some machines, but slower on others. >> >> Has anybody performed any testing or benchmarks on the hardware we >> support? Should we just drop this and continue to use floating point >> resampler code? >> >> Luke >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~ubuntu-audio-dev >> Post to : ubuntu-audio-dev at lists.launchpad.net >> Unsubscribe : https://launchpad.net/~ubuntu-audio-dev >> More help : https://help.launchpad.net/ListHelp >> > -- Alexander E. Patrakov
