[FFmpeg-devel] [PATCH] swscale/swscale-test: Code to test scaler with slices

[Pedro Arthur]

Hi, I took the time to investigate it and I find a few bugs which I'm
attaching a patch for them.
Yet I'm not convinced that it is a definitive fix, since the output of
swscale-test differs in some cases when scaling the whole frame or in
slices.
Also there is a few fixes needed in this patch which took me a while to
figure out because I blindly trusted the patch was correct.

2016-06-05 9:27 GMT-03:00 Michael Niedermayer <michael at niedermayer.cc>:

> +        src_tmp[0] += srcStride[0] * i * STEP;
>
here it should be:
src_tmp[0] += srcStride[0] * i;

+        if (src_tmp[2]) {
> +            int step = STEP >> desc_src->log2_chroma_h;
>
+            src_tmp[1] += srcStride[1] * i * step;
> +            src_tmp[2] += srcStride[2] * i * step;
> +        }
> +        if (src_tmp[3])
> +            src_tmp[3] += srcStride[3] * i * STEP;
>
The same applies for the above code.

Regards,
Pedro.
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