[x265] question about interp

[chen]

it is magic number, just algorithm trick.
 
When you analyze H265 interp Dynamic Range.
You will found it is not balance, it means the middle point is not 0x8000 (unsigned) or 0 (signed)
The offset magic to avoid overflow.
 
Thanks,
Min

At 2015-06-19 06:21:02,dave <dtyx265 at gmail.com> wrote:
>For the interpolation primitives there are multiple versions, pp, ps, 
>sp, and ss.  Each one adding an offset before a shift.  Yet as I review 
>the interpolation section 8.5.3.3.3 of the h265 spec, I don't see where 
>an offset is added.  Am I missing something?  Or perhaps the offset 
>helps decision making?
>
>thanks,
>Dave
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