[FFmpeg-devel] [PATCH 1/2] tests/checkasm/sw_rgb: Added {yuyv, uyvy}toyuv{420, 422} test cases

[Martin Storsjö]

On Tue, 11 Feb 2025, Krzysztof Pyrkosz via ffmpeg-devel wrote:

> Splitting the previous patch into two.
> I noticed that on my x86 box, one of the newly added tests fail:
>
> MMXEXT:
>   uyvytoyuv420_mmxext (sw_rgb.c:126)
>   yuyvtoyuv420_mmxext (sw_rgb.c:126)
> - sw_rgb.uyvytoyuv          [FAILED]
>
> SSE2, AVX and AVX2 are passing, though.

I checked this, and the reason that this is failing, is that the chroma 
values are off by one, for a lot of the output pixels here.

Kinda surprising for something that should only reshuffle pixels and not 
touch their values...

// Martin