[Libdlo] Getting semi-decoded MPEG data?

[Bernie Thompson]

Hi Florian,

I don't know enough about the mpeg decode path to steer anyone straight here.

You're right, it definitely seems like there should be an opportunity
for better mpeg decode/motion comp with device to device blits and
panning the framebuffer (libdlo shows how to do both of these - udlfb
uses neither today because they don't help normal X operations).

I'm sure you're already familiar with all this, but a starting point:
http://en.wikipedia.org/wiki/X-Video_Motion_Compensation.

Best wishes,
Bernie



On Wed, Feb 10, 2010 at 3:48 AM, Florian Echtler <floe at butterbrot.org> wrote:
> Hello everyone,
>
> I've tried asking this question on the ffmpeg list several times, but I
> didn't get any useful answer, so I'll try it here again.
>
> I'm thinking about using the bitblt functions of the DL-1xx chips to
> speed up MPEG/H264/whatever decoding by doing the block transformations
> on the device. For this to work, I'd need the decoded macroblocks, but
> not the finished picture. Does anybody know any software which can
> deliver this data?
>
> Follow-up question: how does Xv/XVMC/VAAPI/VDPAU handle this? Would it
> be possible to integrate such functionality into the Xorg driver and
> expose it as one of the standard acceleration APIs?
>
> Florian
> --
> 0666 - Filemode of the Beast
>
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