[x264-devel] Pixel_satd_wxh function

[Stephen Henry]

Hi all,

I'm messing around with the source code and I have a question. In the
function pixel_satd_wxh, the code seems to suggest that the encoder is
calculating a residual (using the pixel_sub_4x4 function) and then
performing a series of loops calculating s01, s23 etc... What is the
purpose of these loops?

Thanks,

Stephen Henry 

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