Mailinglist Archive: radeonhd (427 mails)

[Anders Eriksson <aeriksson@xxxxxxxxxxx>]

alexdeucher@xxxxxxxxx said:
> There are several stages in the decode part of the pipeline.  idct and mc are
> the main ones.  On r1xx-r5xx (including rs6xx), we do the mc part for the
> decode using the 3D engine (shaders on r3xx+, special instructions on
> r1xx-r2xx).  R6xx and r7xx chips have a special dedicated UVD block for video
> decode.  We plan to review that block to see if we can release any of it, but
> no promises.  Regardless, you could do mc on r6xx/r7xx using shaders as well.
>  For MPEG1/2 you could implement an XvMC driver and implement mc using
> shaders.  

I recall reading something on this somehwere (phoronix?). it was something 
along the lines of mc for mpeg2 (ie DVD content) could (is?) easily done in 
CPUs these days so there's no need to spend the manhours on using HW 
acceleration for it. Is that so?

> I believe intel does this.  The problem is XvMC doesn't support
> newer formats like H.264 or whatever. 

Aha. But, if I understand it currectly, there _is_ tanglible stuff for hd
playback (h.264) which the rs690 could help with, which has not yet been 
implemented? If so, are there plans to implement those parts?

-Anders



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