[Bug 753591] vaapi: encoders: implement "direct-uploading"

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=753591

--- Comment #8 from Víctor Manuel Jáquez Leal <vjaquez at igalia.com> ---
(In reply to Josep Torra Valles from comment #7)
> (In reply to sreerenj from comment #5)
> > (In reply to Víctor Manuel Jáquez Leal from comment #4)
> > > I have pushed a branch, in my repository, with direct upload working:
> > > 
> > > https://github.com/ceyusa/gstreamer-vaapi/commits/753591
> > 
> > Please ask Josep Torra whether your branch giving better perfromance with
> > his 4k encode test cases . If what we understood from the analysis done
> > during gstconf is correct, then it supposed to give significant perfomance
> > improvement while encoding non tiled surface.
> 
> We are not yet there, the change that this had been introduced causes dmabuf
> and non dmabuf case go into the intel_encoder_end_picture ->
> intel_encoder_check_yuv_surface ->  i965_image_processing path.
> 
> It's a relative improvement, but seems like the surface isn't created as a
> tiled surface.

Cool.

A further test is to change alloc_flag to 0 in

https://github.com/ceyusa/gstreamer-vaapi/commit/7bb4a127cefb9273de443454dc27a4560dbc4752#diff-0f026fb085abba2cfd45eabad1f57be3R538

in this way, instead on allocating linear surfaces, it is allocated tiled
surfaces

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