On Sun, 16 Nov 2008 17:53:44 +0100 Michael Niedermayer <michaelni at gmx.at> wrote: > On Sat, Nov 15, 2008 at 07:10:53PM -0500, Justin Ruggles wrote: > > > > +#define M_SQRT_POW2_15 181 > > what does the 15 mean? I guess it means sqrt(pow(2,15)), IOW sqrt(32768). Aurel