[Intel-gfx] HD XvMC on i915

Nathan A. Stine nathan.stine at gmail.com
Sun Oct 18 00:34:08 CEST 2009


I was doing a little bit of poking around in the source and found that
the i915 driver has a max size of 720x576 for XvMC acceleration of
MPEG-2.  Changing this to 1920x1080 gave a clean compile and would still
properly accelerate and display 720x576 content, but not 1920x1080
content.  The video was heavily distorted and had a green overlay.


1) Is 720x576 a hardware limitation?  I am using a 945G chip.

2) If the answer to 1) is no, what would it take to extend the driver to
be able to accelerate 1920x1080 content?

3) If the answer to 1) is yes, do any chip/driver combinations support
XvMC for 720p/1080i MPEG-2 content?  The manpage only lists XvMC as
supported for i915/965 and G33.  Is this current information?

The motivation here is to relieve my CPU the burden of decoding
720p/1080i MPEG-2 content.  If an upgrade will do it, I'd be happy to
look into it, but I wanted to see what my options were.

Best regards,

Nathan A. Stine

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