Window functions

Window([normalize, precision, device])	Abstract class defining a window function.
HannWindow([normalize, precision, device])	Block for defining a Hann window function.
HammingWindow([normalize, precision, device])	Block for defining a Hamming window function.
BlackmanWindow([normalize, precision, device])	Block for defining a Blackman window function.
CustomWindow(coefficients[, normalize, ...])	Block for defining a custom window function.