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VampPluginSDK Chris@3:  2.4 Chris@3:
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Chris@3: Static Public Member Functions
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Vamp::FFT Class Reference
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A simple FFT implementation provided for convenience of plugin authors. Chris@3: More...

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#include <FFT.h>

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List of all members.

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Chris@3: Static Public Member Functions

static void forward (unsigned int n, const double *ri, const double *ii, double *ro, double *io)
 Calculate a forward transform of size n.
static void inverse (unsigned int n, const double *ri, const double *ii, double *ro, double *io)
 Calculate an inverse transform of size n.
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Detailed Description

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A simple FFT implementation provided for convenience of plugin authors.

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This class provides double-precision FFTs in power-of-two sizes only. It is slower than more sophisticated library implementations. If these requirements aren't suitable, make other arrangements.

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The inverse transform is scaled by 1/n.

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The implementation is from Don Cross's public domain FFT code.

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Definition at line 58 of file FFT.h.

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Member Function Documentation

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static void Vamp::FFT::forward (unsigned int n,
const double * ri,
const double * ii,
double * ro,
double * io 
) [static]
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Calculate a forward transform of size n.

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ri and ii must point to the real and imaginary component arrays of the input. For real input, ii may be NULL.

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ro and io must point to enough space to receive the real and imaginary component arrays of the output.

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All input and output arrays are of size n.

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static void Vamp::FFT::inverse (unsigned int n,
const double * ri,
const double * ii,
double * ro,
double * io 
) [static]
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Calculate an inverse transform of size n.

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ri and ii must point to the real and imaginary component arrays of the input. For real input, ii may be NULL.

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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.

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All input and output arrays are of size n.

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The documentation for this class was generated from the following file: Chris@3:
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