[mythtv-users] XvMC, i915, latest intel drivers

[jb17bsome]

On Sat, 12 Apr 2008 23:15:53 -0400
George Nassas <gnassas at mac.com> wrote:

> On 11-Apr-08, at 6:32 PM, jb17bsome wrote:
> 
> > On Fri, 11 Apr 2008 17:55:38 -0400
> > "R. G. Newbury" <newbury at mandamus.org> wrote:
> >>
> >>
> >> Where did you get that piece of information about 720x576? I
> >> understood that the intel (with xvmc) driver could handle the full
> >> 2048x2048 xv image size...makes no sense otherwise...
> >>
> > I looked in the xf86-video-intel source.
> > Yes, xv lets you have 2048x2048 images.  However, xvmc has different
> > limitations that are kept separate from xv.
> 
> Where in the source did you find this limit? I see where it's
> defined for the i810 driver but I don't see anything for the i915 one.
> 
> I'm looking in xf86-video-intel-2.2.99.901/src/xvmc.
> 
> - George
> 
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You have to look in the *_hwmc.c files in the ddx driver a directory
above.  The xvmc library talks to the ddx driver to setup each
surface.    
So, for the i915 that would be i915_hwmc.c. Once you are
in the file just search for the XF86MCSurfaceInfoRec structure. That
structure defines (among other things) the max width/height for each
mpeg surface.