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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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This is a generic FFT shift object. Includes C++ unit tests.
The class is templated and thus works with FFTs of any type.
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CPack is not used, unmaintaned, and broken.
This does not eliminate any MSVC build functionality.
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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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