Bug#441693: ITP: djbfft -- extremely fast library for floating-point convolution
greffrath at leat.rub.de
Fri Apr 25 11:48:35 UTC 2008
Package Name: djbfft
Upstream Author: D. J. Bernstein
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
Lehrstuhl für Energieanlagen und Energieprozesstechnik (LEAT)
Universitätsstr. 150, IB 3/134
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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