The first thing I want to try is as follows: I would like to be able to use this algorithm on compile-time values, such as a known filter, and re-use it on the input signal I want to process at run-time. The usual use case is that you have a pre-computed filter (the DFT of your filter), and perform an FFT on an input signal at run-time. Instead of calculating the DFT off-line, I would like to just calculate this with a compile-time operation. For now, I could just use the DFT operation for the run-time calculation, but maybe later rewrite it as an FFT. After this I would like to try this on signals that mix run-time and compile-time values, such as a signal padded with zeros. This could potentially eliminate the usual DFT/FFT instructions on the zeroed part, using the compiler to optimize these away. Chris On 1/22/07, Joel de Guzman <joel@boost-consulting.com> wrote:
Chris Weed wrote:
Hi, I wanted to try to write a DFT that can take a compile-time data structure such as the following:
[snip]
There doesn't seem to be a runtime component there. What am I missing? Do you intend to mix runtime values (e.g. int, doubles) with mpl math stuff?
Regards, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net
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