can 3D support help for HD video playback ?

Jerome Glisse glisse at
Mon Jul 7 11:48:33 PDT 2008

On Mon, 7 Jul 2008 11:19:46 -0400
"Alex Deucher" <alexdeucher at> wrote:

> On Mon, Jul 7, 2008 at 8:16 AM, Goga777 <goga777 at> wrote:
> > Hi
> >
> > in Linux forums there's different opinions about my question, that's why I want to clarify this moment here.
> >
> > Can 3D support (dri/mesa/drm/opengl) help for HDTV video (2D) playback or not ? I mean the Radeon's series cards and
> > open-source radeon driver
> In theory the 3D engine could be used to aid in the video decode
> process, however none of this has been implemented yet for radeon hw.
> The 3D engine can also be used for video rendering using the texture
> engine and this is implemented for r1xx-r5xx radeons.  for decode, the
> 3D is generally used for motion compensation (MC).  r1xx-r6xx radeons
> also have dedicated idct hw.  On newer chips the UVD block handles all
> of this.  There is work going on to support XvMC decode via the 3D
> engine using gallium, but that will need gallium driver for radeon.
> Alex
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Jerome Glisse

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