[x265] [PATCH] optimize and remove Pow() in processRowEncoder() to avoid VS2008 build error 'ambiguous...'

[Derek Buitenhuis]

On 7/3/2014 7:40 PM, Min Chen wrote:
> -            double scale = pow((double)2, g_maxCUSize / 16);
> +            static const uint32_t scaleTable[] = {2, 4, 16};
> +            uint32_t scaleIndex = (g_convertToBit[g_maxCUSize] + 2 - 4);
> +            double scale = (double)scaleTable[scaleIndex];
> +            X265_CHECK(pow((double)2, (int)(g_maxCUSize >> 4)) == scale, "Failed on scale!\n");

Any reason you cant just use 1<<N ?

- Derek