VampPluginSDK
2.9

A simple FFT implementation provided for convenience of plugin authors. More...
#include <FFT.h>
Static Public Member Functions  
static void  forward (unsigned int n, const double *ri, const double *ii, double *ro, double *io) 
Calculate a oneshot forward transform of size n. More...  
static void  inverse (unsigned int n, const double *ri, const double *ii, double *ro, double *io) 
Calculate a oneshot inverse transform of size n. More...  
Detailed Description
A simple FFT implementation provided for convenience of plugin authors.
This class provides oneshot (i.e. fixed table state is recalculated every time) doubleprecision complexcomplex transforms. For repeated transforms from real timedomain data, use an FFTComplex or FFTReal object instead.
Note: If the SDK has been compiled with the SINGLE_PRECISION_FFT flag, then all FFTs will use single precision internally. The default is double precision. The API uses doubles in either case.
The forward transform is unscaled; the inverse transform is scaled by 1/n.
Member Function Documentation

static 
Calculate a oneshot forward transform of size n.
n must be a multiple of 2.
ri and ii must point to the real and imaginary component arrays of the input. For real input, ii may be NULL.
ro and io must point to enough space to receive the real and imaginary component arrays of the output.
All input and output arrays are of size n.

static 
Calculate a oneshot inverse transform of size n.
n must be a power of 2, greater than 1.
ri and ii must point to the real and imaginary component arrays of the input. For real input, ii may be NULL.
ro and io must point to enough space to receive the real and imaginary component arrays of the output. The output is scaled by 1/n. The output pointers may not be NULL, even if the output is expected to be real.
All input and output arrays are of size n.
The documentation for this class was generated from the following file:
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