[Ffmpeg-devel] [PATCH] fix mpegaudiodec on ARM and benchmark

Siarhei Siamashka siarhei.siamashka
Wed Sep 13 21:46:25 CEST 2006

On Wednesday 13 September 2006 11:50, Guillaume POIRIER wrote:
> On 9/12/06, Siarhei Siamashka <siarhei.siamashka at gmail.com> wrote:
> > On Thursday 24 August 2006 11:30, Guillaume Poirier wrote:
> > > For what it's worth, there's a forked version of MPlayer for Zaurus
> > > which is supposed to be faster on ARM.
> > > The author doesn't seem to be receptive to request to send his
> > > contributions back as patches, but his fork is available here
> > > http://atty.skr.jp/WebSVN/listing.php?repname=mplayer-w100&path=%2Ftrun
> > >k%2F &rev=0&sc=1
> > >
> > > Some of the improvement involve using IPP, others to use inline asm.
> >
> > Thanks I also checked this code. As far as I understand it, most of the
> > improvements from this forked version are already included into ffmpeg
> > (revision 4311). The things that are left are some Zaurus specific video
> > drivers and patches for libmpeg2 code.
> Please do double check. I'm not 100% sure, but last time I checked the
> changelog showed that he had re-written some calls to IPP with
> hand-written asm routines.
> I have send a patch some time ago which contained the differences
> between current code in FFmpeg and the one in mplayer-w100 and AFAIR,
> there were some unmerged code.

Maybe you are right, but this Zaurus port has a lot of code using IWMMX
instructions which are not supported on my Nokia 770 device. So I can't test
if all this code works correctly and can't provide much help with merging it
into ffmpeg. It would be better to have this code checked by someone actually
using a device with ARM XScale cpu.

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