lvqcl wrote:
> Try something like this:
>
> void FLAC__window_gauss(FLAC__real *window, const FLAC__int32 L, const
> FLAC__real stddev)
> {
> static const double anti_denormal =
> 0.88817841970012523233890533447266e-15; /* 2e-50 */
> const FLAC__int32 N = L - 1;
Sorry, it was copy-pasted from another program where I use doubles.
But window[] has FLAC__real (==float) type, so anti_denormal should
also be FLAC__real for performance reasons.
Also, maybe a value of anti_denormal is not optimal, I currently don't
remember why I decided to use this value.
According to <http://musicdsp.org/files/denormal.pdf>, 3.1.2:
"For example if the whole calculation is done in the FPU registers,
a 80-bit arithmetic may be used, with 64-bit mantissas. The anti_denormal
value should therefore be 2^64 times higher than FLT_MIN."
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