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VampPluginSDK Chris@6:  2.7 Chris@6:
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Chris@6: Public Member Functions | Chris@6: Private Attributes | Chris@6: List of all members
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Vamp::FFTReal Class Reference
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A simple FFT implementation provided for convenience of plugin authors. Chris@6: More...

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#include <FFT.h>

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Chris@6: Public Member Functions

 FFTReal (unsigned int n)
 Prepare to calculate transforms of size n. More...
 
 ~FFTReal ()
 
void forward (const double *ri, double *co)
 Calculate a forward transform of size n. More...
 
void inverse (const double *ci, double *ro)
 Calculate an inverse transform of size n. More...
 
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Chris@6: Private Attributes

D * m_d
 
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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 transforms between double-precision real time-domain and double-precision complex frequency-domain data.

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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.

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The forward transform is unscaled; the inverse transform is scaled by 1/n.

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Definition at line 161 of file FFT.h.

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Constructor & Destructor Documentation

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◆ FFTReal()

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Vamp::FFTReal::FFTReal (unsigned int n)
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Prepare to calculate transforms of size n.

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n must be a multiple of 2.

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◆ ~FFTReal()

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Vamp::FFTReal::~FFTReal ()
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Member Function Documentation

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◆ forward()

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void Vamp::FFTReal::forward (const double * ri,
double * co 
)
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Calculate a forward transform of size n.

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ri must point to the real input data of size n.

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co must point to enough space to receive an interleaved complex output array of size n/2+1 (that is, n+2 doubles in total).

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◆ inverse()

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void Vamp::FFTReal::inverse (const double * ci,
double * ro 
)
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Calculate an inverse transform of size n.

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ci must point to an interleaved complex input array of size n/2+1 (that is, n+2 doubles in total).

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ro must point to enough space to receive the real output data of size n. The output is scaled by 1/n and only the real part is returned.

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Member Data Documentation

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◆ m_d

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D* Vamp::FFTReal::m_d
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Definition at line 195 of file FFT.h.

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The documentation for this class was generated from the following file: Chris@6:
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