Date: Mon, 3 Aug 1998 12:20:28 +1000 From: "Andrew Reilly" <reilly@zeta.org.au> To: jgrosch@mooseriver.com, Stephen Hocking-Senior Programmer PGS Tensor Perth <shocking@prth.pgs.com>, hackers@FreeBSD.ORG Subject: Re: Fast FFT routines with source? Message-ID: <19980803122028.A19751@reilly.home> In-Reply-To: <19980802014204.A12287@mooseriver.com>; from Josef Grosch on Sun, Aug 02, 1998 at 01:42:04AM -0700 References: <199808010637.OAA04884@ariadne.tensor.pgs.com> <19980802014204.A12287@mooseriver.com>
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On Sun, Aug 02, 1998 at 01:42:04AM -0700, Josef Grosch wrote: > On Sat, Aug 01, 1998 at 02:37:58PM +0800, Stephen Hocking-Senior Programmer PGS Tensor Perth wrote: > >I'm part way through porting this company's seismic data processing code to > >FreeBSD and have got most things sorted out except for the fact that there > >doesn't seem to be any carefully optimised fft routines available. I do have > >the fftpack as found in ports, but I was wondering if there was anything > >faster than taht available with source. > > > >Oh, and if anyone knows where to find the source of X widgets that'll display > >seismic traces, power spectrums and the like, I'd be most grateful. > > > My father, a math and computer science professor, suggested "Numerical > Recipies", by Press, et al. No, Numerical Recipes is not even a little bit optimised, and although the Fortran version is OK, the C version is horrible, being a translitteration from the Fortran version, for the most part. The hackery to get Fortran-style offset-1 array indexing is particularly nasty. The other suggestions made here are all good sources of FFT code. Be aware that the fftw code has a particularly curly licence. -- Andrew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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