[Ffmpeg-devel] libavcodec + IPP
Tue Nov 8 22:48:07 CET 2005
On 11/8/05, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Tue, Nov 08, 2005 at 09:36:56PM +0100, Matthias Wieser wrote:
> > Am Dienstag, 8. November 2005 13:45 schrieb Bj?rn Ard?:
> > > Hi,
> > >
> > > We have done some performance tests with libavcodec on an intel pentium
> > > 4 CPU uncompressing a mpeg 2 video stream.
> > >
> > > We noticed that we could replace the idct algoritm with the
> > > corresponding IPP function. This increased the performance by about 10%
> > > compared to the MMX2 version in libavcodec (FF_IDCT_LIBMPEG2MMX).
> > Is it faster on an Athlon, too?
> ill bet they check for athlon and disable all optimizations then, its
> intel after all ;)
Just like they do with their compiler:
Reading doesn't hurt, really!
-- Dominik 'Rathann' Mierzejewski
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