On Fri, 10 May 2019 09:35:40 +0300
Lauri Kasanen <[email protected]> wrote:

> 
> I'm having trouble making out what formats exactly isSemiPlanarYUV()
> matches. Are you sure it's an equivalent check?
> 

Well, the check's been in there for quite a while; that's not new.

(isPlanarYUV(pix_fmt) && desc->comp[1].plane == desc->comp[2].plane);

So, any planar yuv format where component 1 and component 2 are on the
same plane. Except for semi planar formats, you expect either all
components on the same plane (packed, so not planar) or every component
on a separate plain (normal planar).

--phil
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