On Thu, Nov 20, 2014 at 8:30 AM, Sjoerd Simons <sjoerd at luon.net> wrote: > On Thu, 2014-11-20 at 11:58 +0100, David Henningsson wrote: >> >> On 2014-11-20 08:40, Alexander E. Patrakov wrote: >> > 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 That patch has been superseded by this commit: 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. >> >> Well, this is a more of an "upstream default" question rather than a >> "why don't you recompile speex" question, and one where it might make >> sense to come up with something reasonable across the board; either by >> upstreaming "fixed point by default for armhf", or by Debian to drop its >> patch. >> >> It does not look likely to me that PulseAudio upstream and Debian would >> correspond to so different machine/user scenarios so that a Debian >> specific patch would make sense here. > > Well with the patch mentioned here, i would probably drop that patch > from Debian in any case as pulse would just follow speex (which is the > right thing anyway).. Which makes the upstream choice in pulse a bit > moot? > > That said i'd still be interesting on seeing speex resampling benchmark > numbers on a wider set of recentish boards. In debian the speex maintainer has refused to enable floating point on armhf [1][2], claiming benchmarks show that fixed point is better even on armhf. I have not seen those benchmarks, so if it is possible to corroborate or dispel this information it would be great. On ubuntu I understand speex is built with floating point. I only have a raspberry pi to try things on, but I'd be glad to run a benchmark there if that is of any use. [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=736752 [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=700602 -- Saludos, Felipe Sateler
