[Cin] add Vulkan hwaccel

[Phyllis Smith]

Checked into GIT after building and displaying on Fedora 32.  Should be OK
on Ubuntu 16 also.

On Tue, May 6, 2025 at 11:31 PM Andrew Randrianasulu <
randrianasulu at gmail.com> wrote:

> After further testing it seems that it only works reliable with HEVC
> video, on my machine :(
>
> But for hevc it really speeds things up :)
>
> second patch adds tooltip for Vulkan decoding, and changes
> pixel_format for more common for those hwaccels, hopefully.
>
>
> On Wed, May 7, 2025 at 3:49 AM Andrew Randrianasulu
> <randrianasulu at gmail.com> wrote:
> >
> > Now non-tonemapped 4k h264 hit 56 fps in window  :)
>
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