[vorbis-dev] alloca() problem with CodeWarrior

[Segher Boessenkool]

Brett Paterson wrote:
> 
> >
> > Maybe.  I'm not sure what the clockspeed or the ARM generation of the
> > cpu in that thing
> > is.  What I _do_ know is that a Vorbis decoder exists, that runs in
> > <1MHz on a ppc G4.
> >
> >
> 
> Are you saying it takes only 22cycles per sample (at 44khz) to decode a
> vorbis track? (or .1% if you mean a 1ghz g4).  Some pcm software mixers
> are only this fast (well it's a bit slow for a mixer but not unusual).
> I find this hard to believe when the current reference decoder takes
> about 20-30 times more cpu than that on my 1.2 ghz machine.

I mean it takes .17% time on my ppc7410/500MHz.  This is more than 19
cycles per output sample, which is perfectly reasonable.  Anything a
lot slower is just badly written (or not written for good performance).

<p>Segher

<p>--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'vorbis-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.