[Spice-devel] [PATCH RFC EXP] remote Virgl support

[Marc-André Lureau]

Hi

----- Original Message -----
> 
> > Hi,
> > 
> > > Yes you want to use EGL here, I think we could probably put more code in
> > > qemu
> > > to help with this case.
> > 
> > Sure, if anything is needed we'll get that sorted ;)
> > 
> > I suspect spice-server needs access to the gl context helpers
> > (dpy_gl_ctx_*) if it wants use opengl.
> > 
> 
> I would prefer some more low level (like EGLDisplay, EGLContext or
> EGLSurface),
> I'll do some more digging, not clear what a possible interface should be,
> surely having duplicate EGL initialization (Qemu and spice-server) does not
> look
> a good thing.
> 
> In the meantime I was trying gstreamer-vaapi (thanks to Christophe) and
> did some more digging. Gstreamer seems to suppose that a dmabuf is mmap-able.

I double gst_vaapi_surface_new_from_egl_image() will be mmap'ed by vaapi*enc

> About vaapi implementation looks like Intel if quite good but for other
> cards is not that great. Particularly for Nvidia the plugin is an
> adapter for vdpau which does decoding, not encoding. Encoding for
> Nvidia is done with NvENC (which looks hard to install on Linux).

Yep, a handful of encoding APIs to deal with. Hopefully GStreamer can abstract it away for us. Anyway that's the best place to do that in the stack imho. I think it would be better to ask all that gstreamer question on gst-devel ML.

> Another problem I got (I should open a bug) is that Qemu with Virgl
> wake up spice 40/50 times a seconds (calling spice_qxl_wakeup) for no
> apparent reason.

There are some gui timer bits that could be disabled iirc