| * Sine and Cosine Transforms from FFTPACK. |
| |
| * A simple multidimensional fft. |
| |
| * Convolutions. This will need different interfaces corresponding to |
| the type of underlying FFT (radix-2, mixed-radix, radix-2 real, |
| mixed-radix real). The convolution function should be fft'ed before |
| being passed, so that the function can be used in a loop. The main |
| point of the function being to do the index manipulation for the |
| multiplication F*G. Theoretically someone might want to convolve real |
| and complex data together which could be done but would double the |
| number of interfaces. It would be reasonable to restrict the |
| convolutions to real-real and complex-complex. |
| |
