On Wed, 23 Nov 2011 18:20:35 +0100, Manu <turkey...@gmail.com> wrote:
Oh wow, awesome! :)
I'm always surprised by the state of the D libraries.. There's already
lots
of awesome obscure things are in there, but also completely obvious major
features blatantly missing :)
There are some real gems, e.g. findRoot.
So how about a DCT? Image/video processing... Perhaps a simple adaptation
of FFT?
Too many different DCTs, too many different needs I'd say.
And it's not clear to me at all whether that class will work with fixed
point data... That's extremely important for a class like this (but
granted, not really in line with D's take on numeric precision).
Almost all audio and video data is in fixed point. Int->float conversion
is
very expensive on many platforms.
Too specialized. Given the obscurity of doing a fixed point FFT, the actual
implementation will be very tough, the log2N gain of calculating
intermediate
results is directly opposed to precision.
It would be interesting to offer vectorized 'Integral <-> Float'
conversions.
On 23 November 2011 17:34, Martin Nowak <d...@dawgfoto.de> wrote:
*Crypto *- +1 as mentioned above, blocked on streams...
*Higher level maths/signal processing *- The linear algebra library
mentioned in a previous post might be very useful, but also standard
algorithms like fourier transforms. Library implementations of these
would
http://www.d-programming-**language.org/phobos/std_**numeric.html#Fft<http://www.d-programming-language.org/phobos/std_numeric.html#Fft>
The performance is actually quite good. I'd only wish for a real to
half-spectrum specialization (probably in-place) performance wise.
be amazing, potentially making use of hardware back ends where
possible.
