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Signed-off-by: Josh Morman <jmorman@gnuradio.org>
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* fft: refactor fft classes as templates
In order to reduce code duplication construct fft objects and blocks
with template paramters.
Separate forward and reverse as a template
parameter
Maintain the real fft block forward as r2c and reverse as r2c as well
Co-authored-by: Andrej Rode <mail@andrejro.de>
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All of the removed `from __future__ import` were needed in older
versions of Python (mostly 2.5.x and below) but later became mandatory
in most versions of Python 3 hence are not necessary anymore.
More specifically, according to __future__.py[1]:
- unicode_literals is part of Python since versions 2.6.0 and 3.0.0;
- print_function is part of Python since versions 2.6.0 and 3.0.0;
- absolute_import is part of Python since versions 2.5.0 and 3.0.0;
- division is part of Python since versions 2.2.0 and 3.0.0;
Get rid of those unnecessary imports to slightly clean up the codebase.
[1] https://github.com/python/cpython/blob/master/Lib/__future__.py
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Remove window.py. All windows built using C++ functions. Exported into Python in same module (from gnuradio.fft import window).
Removed all window building work in firdes, too. firdes.window now makes a direct call to fft.window.build with same parameters.
Added documentation for window functions, including references to where to find coefficients and equations for (most of) the windows.
All changes should not affect existing code.
f
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