[x265] [PATCH] Fix: scaling_list_delta_coef out of range

[Aruna Matheswaran]

Pushed into default branch.

On Wed, May 8, 2019 at 5:59 AM <tamura at pegasys-inc.com> wrote:

> # HG changeset patch
> # User Masaharu Tamura <tamura at pegasys-inc.com>
> # Date 1557275282 -32400
> #      Wed May 08 09:28:02 2019 +0900
> # Node ID fa93a9a51f0e04cb61e165b9681742caf3ae9d25
> # Parent  feec4bdf98663ac4a2561b63e1ccec423c7d26a4
> Fix: scaling_list_delta_coef out of range.
>
> diff -r feec4bdf9866 -r fa93a9a51f0e source/encoder/entropy.cpp
> --- a/source/encoder/entropy.cpp        Tue Apr 30 09:41:10 2019 +0530
> +++ b/source/encoder/entropy.cpp        Wed May 08 09:28:02 2019 +0900
> @@ -530,6 +530,10 @@
>      for (int i = 0; i < coefNum; i++)
>      {
>          data = src[scan[i]] - nextCoef;
> +        if (data < -128)
> +            data += 256;
> +        if (data > 127)
> +            data -= 256;
>          nextCoef = (nextCoef + data + 256) % 256;
>          WRITE_SVLC(data,  "scaling_list_delta_coef");
>      }
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>


-- 
Regards,
Aruna
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