[MPlayer-dev-eng] Re: Vorbis decoding performance

[Aurelien Jacobs]

On Tue, 8 Aug 2006 10:07:12 +0200
Michael Niedermayer <michaelni at gmx.at> wrote:

> Hi
> 
> On Tue, Aug 08, 2006 at 12:28:38AM +0200, Balatoni Denes wrote:
> > Hi!
> > 
> > hétf?? 07 augusztus 2006 23.09-kor Michael Niedermayer ezeket a bolcs 
> > gondolatokat fogalmazta meg:
> > > hmm floating point emulation is slow sure but it shouldnt be that slow ...
> > >
> > > [...]
> > 
> > Actually, tremor being at least 20 times faster than floating point whatever 
> > is what I would have expected on arm. 
> > 
> > (wma - floating point - on a 206 mhz arm cpu needed 300% cpu time, compared to 
> > tremor or libmad's 10-20%, when I tested these a few years ago on a strongarm 
> > 1100 206 mhz cpu).
> 
> maybe you want to look at libavutil/softfloat.h
> its some simple software floating point thingy, benchmark code is in 
> libavutil/softfloat.c, if its fast on arm [...]

Nice benchmark, but unfortunatly there's not START/STOP_TIMER implementation
for ARM :-(
Maybe I should try to implement one using the Xscale specific Performance
Monitor...

Aurel