Re: [GD-Consoles] anyone used Ogg Vorbis on PS2/GCN?

[brian s. <pud...@po...>]

Key points from the newsgroup discussion:

* IOP is probably too slow to decode Vorbis, unless you use the 
integer-only decoder and don't plan on doing *anything* else with the 
IOP, in which case you might have *just* enough cycles to do it.  If 
that sounds like fun to you, you're braver than I am.  Not an inspiring 
prospect.

* On EE, a simple port of the code gives you a Vorbis engine that 
consumes about 10% of CPU.  Moving the some of the time-critical code 
to VU0 should result in significant speedups, but as far as I can tell 
no one has publicly released such a thing.  Feasible, but requires some 
work unless you have 10% of your CPU budget going unused.

But what I really got out of the discussion was a need to question the 
ancient wisdom that you can't stream audio and data at the same time 
(you'd think GTA3 would have caused me to do that, but I'm kinda slow 
sometimes).  On PS2, the Multistream library looks like it can give me 
a pretty efficient implementation of streaming audio while streaming 
data.  Obviously on Xbox you have so much flexibility with the hard 
drive that it's dead simple to do both.  So the thing I need to figure 
out now is whether I can pull off streaming music and data 
simultaneously on GCN.  And if not, maybe I'll end up using Vorbis 
there.

--brian

On Saturday, April 12, 2003, at 07:55  PM, J. Grant wrote:

> Hi Michael,
>
> Out of interest what was the conclusion of this discussion? I do not 
> have access to sce.* newsgroups.
>
> Which released console titles use Ogg Vorbis steams?
>
> Do sound API's like Miles support Ogg Streams now?
>
> Cheers
>
> JG
>
>
>
> on the 11/04/03 19:14, Michael Pohoreski wrote:
>> Check out the thread "Vorbis" on sce.dev.prog.spu
>> -----Original Message-----
>> From: brian sharon [mailto:pud...@po...] Sent: Friday, April 
>> 11, 2003 10:46 AM
>> To: gam...@li...
>> Subject: [GD-Consoles] anyone used Ogg Vorbis on PS2/GCN?
>> http://www.xiph.org/ogg/vorbis/
>> If you have, would you mind sharing your experience, good or bad?
>> --brian