Mailinglist Archive: radeonhd (427 mails)

["Bridgman, John" <John.Bridgman@xxxxxxx>]

))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?

I don't think there is any other decode acceleration hardware in RS690 other 
than the MPEG-2 IDCT engine. 

As Alex and others have mentioned, shaders can definitely be used for MC and 
post-filtering; it's less clear how much of a benefit you get from using them 
further up the pipe eg IQ and IDCT.

-----Original Message-----
From: Anders Eriksson [mailto:aeriksson@xxxxxxxxxxx] 
Sent: Wednesday, May 13, 2009 3:50 AM
To: Alex Deucher
Cc: Rafał Miłecki; Anders Eriksson; Matthias Hopf; Christiaan van Dijk; 
Christian König; radeonhd@xxxxxxxxxxxx
Subject: Re: [radeonhd] RS690 full-HD performance


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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