can 3D support help for HD video playback ?

[Alex Deucher]

On Mon, Jul 7, 2008 at 8:16 AM, Goga777 <goga777 at bk.ru> 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