Mailinglist Archive: radeonhd (427 mails)

[Alex Deucher <alexdeucher@xxxxxxxxx>]

On Wed, May 13, 2009 at 3:50 AM, Anders Eriksson <aeriksson@xxxxxxxxxxx> wrote:
> 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?

Shaders could be used for just about any video format.  mpeg 1 and 2
would be easiest to implement since there is already an API to
accelerate them (XvMC).

> > 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?

Hopefully eventually.  The information is available in the meantime
for anyone who's interested.

Alex
--
To unsubscribe, e-mail: radeonhd+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: radeonhd+help@xxxxxxxxxxxx