Anyone know the MIPS usage of an MP audio stream? I downloaded a DOS
compressor/decompressor and it was a total beast of a program. That
psycho-acoustic model stuff is really wild...

----- Original Message -----
From: "Andy Mucho" <andy@...>
To: <gbadev@egroups.com>
Sent: Tuesday, October 03, 2000 3:34 PM
Subject: RE: [gbadev] image file format


> Dennis Ranke wrote:
>
> > Hm, since this is a gba mailing list, i assume you are talking about
> > the gameboy advance which shouldn't have much of a problem decoding
> > jpegs. I have just written a decoder in arm asm which should decode a
> > 240x160 jpeg to 15bit color in about 0.5-1 seconds on an 16mhz arm.
> > This should already be good enough for some uses but i'm aware that
> > it is possible to get the decoder to always take less than half a
> > second. (the dct code uses currently the simplest implementation which
> > takes up to 64 muls per pixel...)
>
> Go for the AAN DCT.. Using that I'm currently at 0.31 MegaPixels per
second
> (about 8fps) using 8:1 compressed images. That's still in a complete C++
> implementation with no assembler yet. I see maybe a marginal increase in
the
> DCT core, though the compiler has done a pretty cool job.
> I expect with some hand tweaking to push this to maybe 10fps, and maybe
then
> eek some more speed through other optimisations.
> AndyM
>
>
>
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