Intel kms xvideo/vaapi? (was: Re: VLC problems)

[Juergen Lock]

On Sun, Sep 30, 2012 at 02:00:17PM +0300, Konstantin Belousov wrote:
> On Fri, Sep 28, 2012 at 11:02:06PM +0200, Juergen Lock wrote:
> > On Fri, Sep 28, 2012 at 08:51:19PM +0300, Konstantin Belousov wrote:
> > > On Fri, Sep 28, 2012 at 07:32:16PM +0200, Juergen Lock wrote:
> > > > Well ok, that explains why vlc had problems using xvideo.  (xvideo
> > > > is preferred if available as it reduces cpu load playing video,
> > > > there also is vaapi that offloads video decoding to the gpu too
> > > > but the userland libs needed for that aren't in ports and I wonder
> > > > if intel kms kernel support for it is missing too if xvideo support
> > > > is already missing...  I've Cc'd -x11, maybe someone there knows.)
> > > > 
> > > >  Thanx,
> > > > 	Juergen (who doesn't have intel video hw here only maintains
> > > > a few multimedia ports and updated vlc)
> > > 
> > > Kernel driver does support the VCS ring batches. We should be on par with
> > > the Linux kernel version which was used for the last import.
> > > 
> > > I never compiled/tested vaapi 965 driver myself. Sure, there may be bugs,
> > > which I think are even inevitable, but VCS engine is quite similar and
> > > simpler then render, so I expect that bugs can be fixed if reported.
> > > 
> > > Obvious first step is to get libva 965 driver compiling and added to ports.
> > > The sources are available at git://anongit.freedesktop.org/vaapi/intel-driver.
> > 
> > Ok that is good news.  But is it expected that xvideo isn't supported?
> > 
> I cannot really comment on your last question. Kernel driver does support
> sprite or overlay (depending on the GPU generation). Everything else depends
> on the usermode stack, which should convert overlay into XVideo interface,
> and on harware capabilities. E.g., I am almost sure that compositing migh
> affect xvideo.
> 
Ah!  Derrick, do you have compositing enabled in your xserver?  Do you
have xcompmgr running?  If not, try enabling them and see if xvideo
works then.

 HTH,
	Juergen