Frank Lorenz
2008-Jan-22 14:15 UTC
Re: [Speex-dev] Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h?
Hi Marc, I encountered the problems even with older versions of speex, including 1.2beta2 and 1.1.12, too. I had no time in the last weeks to investigate this issue further, sorry. Hopefully, I'm able to do some more test the next days, but I have no real idea how to proceed Performance and quality seem to be o.k. for me if I deactivate the Blackfin optimizations inside the file "fixed_bfin.h". Because I am not an expert on Blackfin architecture and assembler up to now, I think it would be helpful to start some discussion with David Rowe (his blog points me to the fact he has done a lot of optimizations for Blackfin?)? If I read old posts from this mailing list and David's Blog, it seems like there were people who were able to run speex on Blackfin without these problems? cheers, Frank -----Urspr?ngliche Nachricht----- Von: "Jean-Marc Valin" <jean-marc.valin@usherbrooke.ca> Gesendet: 20.01.08 12:30:06 An: Frank Lorenz <Frank_wtal@web.de> CC: speex-dev@xiph.org Betreff: Re: [Speex-dev] Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h? Hi, Just following up on this. Did were you able to figure out what causes the problem? Also, does it happen with 1.2beta2? Jean-Marc Frank Lorenz a ?crit :> Hello everybody, > > I'm currently trying to run speex on the Blackfin (BF-537) STAMP > evaluation board unter uCLinux. Using 1.2 beta 3, I encountered > problems when activating the Blackfin assembler optimizations. > Without optimizations for blackfin, i.e. calling ./configure > --enable-fixed-point --host=bfin-uclinux everything seems to work > fine. But when I add the --enable-blackfin-asm flag to the above > call, a speech signal which has been passed through the codec is > cleary disturbed (for me, it sounds like the long term prediction > (voice pitch detection) fails -- the signal sounds like the speaker > has a very ugly sore throat). I tried to deactivate each part of the > optimizaitions inside the libspeex directory, one after another. Most > of the "turn-offs" doesn't have any effect. When turning off the > optimizations inside "fixed_bfin.h", there is a big improvement -- > the decoded speech sounds good again, only on some positions in my > speech signal is a huge "click" which sounds like an overdrive caused > by an instable filter. When trying to switch off the optimizations > from "filters_bfin.h", my little program compiles but crashes on > runtime, sometimes (not always reproducable) causing a kernel panic > of uclinux. Error info is "Attempted misaligned instruction cache > fetch". > > Does anybody know what happens here? > > best regards, Frank > _________________________________________________________________________ > In 5 Schritten zur eigenen Homepage. Jetzt Domain sichern und > gestalten! Nur 3,99 EUR/Monat! > http://www.maildomain.web.de/?mc=021114 > > _______________________________________________ Speex-dev mailing > list Speex-dev@xiph.org > http://lists.xiph.org/mailman/listinfo/speex-dev > >_________________________________________________________________________ In 5 Schritten zur eigenen Homepage. Jetzt Domain sichern und gestalten! Nur 3,99 EUR/Monat! http://www.maildomain.web.de/?mc=021114
Apparently Analagous Threads
- FW: Re: Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h?
- FW: Re: Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h / resampler saturation???
- Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h?
- Re: Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h / resampler saturation???
- Re: Problem with Blackfin assembly optimizations -- bug in fixed_bfin.h / resampler saturation???