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Re: [Discuss-gnuradio] IIR Filter taps

From: Ed Criscuolo
Subject: Re: [Discuss-gnuradio] IIR Filter taps
Date: Mon, 19 Nov 2012 12:22:00 -0500
User-agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv: Gecko/20120306 Thunderbird/3.1.20

On 11/19/12 10:11 AM, Tom Rondeau wrote:

used? Should be change the way gr_iif_filter takes in the taps, or
should we change how gr_filter_design produces them?

Thanks for the feedback!


I agree that changing the way gr_iir_filter takes in the taps could
be disruptive, unless backward compatibility is maintained. Some of
the group are using GnuRadio for operational systems.

Here's two more suggestions for solutions:

1.  Add an optional flag parameter to the constructor, with values
    of "Old_API" and "New_API",  with the default set to "Old_API".
    This flag would control how gr_iif_filter interprets the taps.
    It could be maintained this way for some time, with the Old_API
    being deprecated, and eventually change the default to
    New_API, or even make the default a cmake option.

2. Create two subclasses of filter taps that are identical in
   format, and use C++ overloading to determine which constructor
   or set method to use.

@(^.^)@  Ed

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