[FFmpeg-devel] [PATCH 2/2] swscale/input: Avoid calls to av_pix_fmt_desc_get()

Michael Niedermayer michael at niedermayer.cc
Fri Sep 9 17:55:58 EEST 2022


On Thu, Sep 08, 2022 at 11:44:51PM +0200, Andreas Rheinhardt wrote:
> Michael Niedermayer:
> > On Thu, Sep 08, 2022 at 09:38:51PM +0200, Andreas Rheinhardt wrote:
> >> Michael Niedermayer:
[...]
> > To me if i look at the evolution
> > of isBE() / code checking BE-ness it become more messy over time
> > 
> > I think it would be interresting to think about if we can make
> > av_pix_fmt_desc_get(compile time constant) work at compile time.
> > or if we maybe can return to a simpler implementation
> > 
> 
> We could put the av_pix_fmt_descriptors array into an internal header
> and use something like
> 
> static av_always_inline const AVPixFmtDescriptor
> *ff_pix_fmt_descriptor_get(enum AVPixelFormat fmt)
> {
>     if (av_builtin_constant_p(fmt))
>         return &av_pix_fmt_descriptors[fmt];
>     return av_pix_fmt_desc_get(fmt);
> }

yes thats what i was thinking of too.

thx

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I do not agree with what you have to say, but I'll defend to the death your
right to say it. -- Voltaire
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