Bug#441693: ITP: djbfft -- extremely fast library for floating-point convolution

Fabian Greffrath greffrath at leat.rub.de
Fri Apr 25 11:48:35 UTC 2008

Package: wnpp
Severity: wishlist

Package Name:	djbfft
Version:	0.76
Upstream Author:	D. J. Bernstein
URL:	http://cr.yp.to/djbfft.html
License:	Public Domain
Programming Language:	C

  djbfft is an extremely fast library for floating-point convolution.
  The current version holds most of the speed records for
  double-precision FFTs on general-purpose computers.
  djbfft provides power-of-2 complex FFTs, real FFTs at twice the
  speed, and fast multiplication of complex arrays. Single precision
  and double precision are equally supported.

Paul Wise schrieb:
> On Sat, Mar 22, 2008 at 9:19 PM, Fabian Greffrath
> <fabian.greffrath at lycos.de> wrote:
>> Am Samstag, den 22.03.2008, 08:47 +0100 schrieb Sebastian Dröge:
>>> Yes, it does exactly that (and uses xine's own memalign function).
>>  > Unless you build the package with -DLIBA52_DJBFFT and get djbfft from
>>  > somewhere we won't have any accelerated IMDCT transform.
>>  >
>>  > No idea what djbfft exactly is though :)
>>  I've never heard of this before, too. However, the source code can be
>>  found at <http://cr.yp.to/djbfft.html>
>>  It is Copyright 1999, D. J. Bernstein but does not contain a license. I
>>  doubt that it is suitable (or even useful) for Debian.
> DJB has since placed all his future and past software in the public
> domain. Perhaps ping him if you need clarification of this.

Dipl.-Phys. Fabian Greffrath

Ruhr-Universität Bochum
Lehrstuhl für Energieanlagen und Energieprozesstechnik (LEAT)
Universitätsstr. 150, IB 3/134
D-44780 Bochum

Telefon: +49 (0)234 / 32-26334
Fax:     +49 (0)234 / 32-14227
E-Mail:  greffrath at leat.ruhr-uni-bochum.de

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