DSP - I need to design a FIR Low Pass Filter with c/c++


I'm trying to design a FIR Low Pass Filter. I haven't programmed in c/c++ before so I was wondering if anyone could give me a hand. The filter itself is very simple and all I need are the options of entering:

1. The number of taps
2. The sampling frequency
3. The cut-off frequency
4. If Windowing is to be used.
5. If so, to choose a suitable window

Thanks very much, I've only started to work with low pass filters, so I appreciate the help.

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Start here: http://spuc.sourceforge.net/fir.html but not before buying a nice C++ book. :)

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