On Mon, Jan 4, 2016 at 6:38 PM, Ganesh Ajjanagadde <gajjanaga...@gmail.com> wrote: > This is faster; precision assured as result is a float. > > Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com> > --- > libavfilter/avf_showspectrum.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c > index accd8c7..cff98ff 100644 > --- a/libavfilter/avf_showspectrum.c > +++ b/libavfilter/avf_showspectrum.c > @@ -578,7 +578,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, > AVFrame *insamples) > a = cbrt(a); > break; > case FOURTHRT: > - a = pow(a, 0.25); > + a = sqrt(sqrt(a)); > break; > case FIFTHRT: > a = pow(a, 0.20); > -- > 2.6.4 >
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