[MPlayer-dev-eng] [PATCH] vf_ass: avoid a division

[Grigori Goronzy]

On 09/15/2010 03:22 PM, Nicolas George wrote:
> Hi.
> 
> The attached patch avoids a division in the inner loops of the alpha
> blending code of vf_ass.
>

Instead of "x / 255" at all it's usually faster to do "(x + 255) >> 8",
at least in my experience. You can easily transform all divisions to
shifts in this inner loop. Haven't done any tests, though.

Grigori