Flemming Richter Mikkelsen wrote:
On 5/2/07, Casper van Donderen <[EMAIL PROTECTED]> wrote:
http://www.mesdigital.com/english/Products/product_mmsp2.asp
I think this chip is pretty opensource since it is used in the GP2X
I don't want to pay money to micro$oft for wma support, so I do _not_
want that chip.
Anyway I guess it is full of bug:
MP3, WMA Decode & Codec : Support from Microsoft¢ç (porting Windows¢ç
CE.NET)
MPEG1 Layer 1&2 Codec : Support from Microsoft¢ç (porting Windows¢ç
CE.NET)
G.711, ADPCM Codec : Support from Microsoft¢ç (porting Windows¢ç CE.NET)
And I do not think it is open source
I guess this one would be better, but I don't know how they distribute
drivers. The problem with powervr is that they just provide IP. So I
assume it depends on the manufacturers then (I'm afraid most of them are
working in a quite closed development) :
http://www.imgtec.com/PowerVR/products/Video/MVDA2/index.asp
The bad point of this kind of chip are the limited amount of supported
codecs, so this kind below would be better ; also because it's OpenGL|ES
2.0 compatible ;)
"[...] Video processing for free, with the real-time programmable
architecture providing extensive accelerated functions support for
multi-standard video decode and encode." -- ak vertex&fragment shaders
that seems to be extended in this chip to access other kind of resources
(maybe a kind of fast texture wrapper around raw video blocks ?).
http://www.imgtec.com/PowerVR/products/Graphics/SGX/index.asp?Page=2
Now I think the main problem would be the price of a chip like that.
Why not use an FPGA with a bunch of arithmetic operations widely used in
audio / video compression (eg. DCT) and write a media library that
forward most of the job on the FPGA. I don't know if there is more
complete solutions available, but the basic idea is here :
http://www.opencores.org/projects.cgi/web/video_systems/overview
(well I don't have the whole mailing list archived here, so it has maybe
been already mentioned before)
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