class SPCore::LanczosWindow
Produces a Lanczos window of a given size (number of samples). The Lanczos window is used in Lanczos resampling. For more info, see en.wikipedia.org/wiki/Window_function#Lanczos_window.
Attributes
data[R]
Public Class Methods
new(size)
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# File lib/spcore/windows/lanczos_window.rb, line 7 def initialize size @data = Array.new size sinc = lambda {|x| (Math::sin(Math::PI * x))/(Math::PI * x) } size.times do |n| @data[n] = sinc.call(((2.0*n)/(size-1)) - 1) end end