[Bug 764673] blacklist unsupported backend drivers

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=764673

--- Comment #10 from Víctor Manuel Jáquez Leal <vjaquez at igalia.com> ---
(In reply to Julien Isorce from comment #9)
> I think general idea about the whilelist + the env var is good. 
> Since the minimal libva version required at compile time is old (i.e. it
> requires libva > 0.30.4 in current mater:
> https://cgit.freedesktop.org/gstreamer/gstreamer-vaapi/tree/configure.
> ac#n35), 

I think we should increase the libva version requirement in the configure.ac

@Sree what do yo think?

> it would be great to also check the actual version of the va-api
> backend at runtime, the one returned by vaInitialize. And also the driver
> name returned by vaGetDriverName:
> 
> So: va_vendor_string + va_driver_name + min_va_version
> 
> Also I would like to add the following entries in the whitelist:
> "mesa gallium vaapi", "nouveau", 0.38.0
> "mesa gallium vaapi", "radeon", 0.38.0
> 
> If there are bugs in the gallium vaapi backend let's fix them. But I also
> understand that for you it is less priority so having these 3 infos
> (va_vendor_string + va_driver_name + min_va_version) in
> gst_vaapi_check_status:
> https://cgit.freedesktop.org/gstreamer/gstreamer-vaapi/tree/gst-libs/gst/
> vaapi/gstvaapiutils.c#n50 should help with bug triage.

Interesting.

Could you open a bug about this logging feature?

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