[x265] [PATCH] primitives: added C primitives for upShift/downShift input pixels

[Derek Buitenhuis]

On 3/12/2014 8:45 AM, Steve Borho wrote:
>> > -            for (int c = 0; c < width; c++)
>> > +            y += lumaWidth;
>> > +            Y += lumaWidth;
>> > +            v += chromaWidth;
>> > +            V += chromaWidth;
>> > +            u += chromaWidth;
>> > +            U += chromaWidth;
> 
> blech. the destination buffer has loads of padding (stride is much
> wider than width), writing past the right edge is perfectly safe but
> you do need to be careful about reading beyond the input stride.

I'd just like to note that using one letter variables that differ only by case
is *insane*, and renders the code unreadable.

- Derek