From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,101749b7bab4e562 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news4.google.com!news.glorb.com!meganewsservers.com!feeder2.on.meganewsservers.com!216.196.98.140.MISMATCH!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail NNTP-Posting-Date: Wed, 13 Apr 2005 06:22:27 -0500 Date: Wed, 13 Apr 2005 07:22:29 -0400 From: Jeff C User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: FFT References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-ID: NNTP-Posting-Host: 24.147.74.171 X-Trace: sv3-Y79IRaLqQKydwbakPk3N7eyD/dSrA5kZEb/142qRuMsuFCmBKHWxv6UzMu1R/1zZFnaGzXsRgCr1eU3!l815fA7jxk/gzvE9VJdUrkv60g6mb+SUgF3FRCURS67SG3hLU7fm9GPEdwCSmw== X-Complaints-To: abuse@comcast.net X-DMCA-Complaints-To: dmca@comcast.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.32 Xref: g2news1.google.com comp.lang.ada:10412 Date: 2005-04-13T07:22:29-04:00 List-Id: Pascal Obry wrote: > Do we have a good FFT (Fast Fourier Transform) implementation in Ada ? > > Thanks, > Pascal. > I don't know of any great publically available ones. There is a binding to FFTW http://privatewww.essex.ac.uk/~sjs/fftw_ada/fftwa.html but the binding is released as pure GPL (not GMGPL) which would be somewhat ok since I think FFTW itself is also pure GPL. However, I believe you can buy a proprietary license for the FFTW library from MIT. I don't think you can buy a non pure GPL license for the Ada binding. Documentation claims it is Copyright Stephen J. Sangwine but I suspect this is one of those things that is encumbered by some sort of university interest in it as well. If this is the same university as PNG_IO then I'd look elsewhere if you need something non GPL. Several years ago we tried to purchase a license for PNG_IO and after several months our purchasing deparment still was unable to get the office that dealt with this stuff to complete the deal. Eventually the schedule moved far enough along that we had to come up with an alternate approach. The FFTW library itself is pretty nice and complete so if you have no issues with the use of a GPL library/binding take a look.