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Contents
module SPCore
# Produces a Lanczos window of a given size (number of samples).
# The Lanczos window is used in Lanczos resampling.
# For more info, see https://en.wikipedia.org/wiki/Window_function#Lanczos_window.
class LanczosWindow
attr_reader :data
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
end
end
Version data entries
9 entries across 9 versions & 1 rubygems