Complex to Real Fast Fourier Transform. More...

Functions

template<int rank>
array fftC2R (const array &in, bool is_odd=false, const double norm_factor=0)
 C++ Interface for complex to real fast fourier transform. More...
 
AFAPI af_err af_fft_c2r (af_array *out, const af_array in, const double norm_factor, const bool is_odd)
 C Interface for complex to real fast fourier transform for one dimensional signals. More...
 
AFAPI af_err af_fft2_c2r (af_array *out, const af_array in, const double norm_factor, const bool is_odd)
 C Interface for complex to real fast fourier transform for two dimensional signals. More...
 
AFAPI af_err af_fft3_c2r (af_array *out, const af_array in, const double norm_factor, const bool is_odd)
 C Interface for complex to real fast fourier transform for three dimensional signals. More...
 

Detailed Description

Complex to Real Fast Fourier Transform.

Function Documentation

◆ af_fft2_c2r()

AFAPI af_err af_fft2_c2r ( af_array out,
const af_array  in,
const double  norm_factor,
const bool  is_odd 
)

C Interface for complex to real fast fourier transform for two dimensional signals.

Parameters
[out]outis a real array containing the output of the transform.
[in]inis a complex array containing only the non redundant parts of the signals.
[in]norm_factoris the normalization factor with which the input is scaled after the transformation is applied
[in]is_oddis a flag signifying if the output should be even or odd size
Returns
AF_SUCCESS if the fft transform is successful, otherwise an appropriate error code is returned.
Note
The first dimension of the output will be 2 * dim0 - 1 if is_odd is true else 2 * dim0 - 2 where dim0 is the first dimension of the input. The remaining dimensions are unchanged.

◆ af_fft3_c2r()

AFAPI af_err af_fft3_c2r ( af_array out,
const af_array  in,
const double  norm_factor,
const bool  is_odd 
)

C Interface for complex to real fast fourier transform for three dimensional signals.

Parameters
[out]outis a real array containing the output of the transform.
[in]inis a complex array containing only the non redundant parts of the signals.
[in]norm_factoris the normalization factor with which the input is scaled after the transformation is applied
[in]is_oddis a flag signifying if the output should be even or odd size
Returns
AF_SUCCESS if the fft transform is successful, otherwise an appropriate error code is returned.
Note
The first dimension of the output will be 2 * dim0 - 1 if is_odd is true else 2 * dim0 - 2 where dim0 is the first dimension of the input. The remaining dimensions are unchanged.

◆ af_fft_c2r()

AFAPI af_err af_fft_c2r ( af_array out,
const af_array  in,
const double  norm_factor,
const bool  is_odd 
)

C Interface for complex to real fast fourier transform for one dimensional signals.

Parameters
[out]outis a real array containing the output of the transform.
[in]inis a complex array containing only the non redundant parts of the signals.
[in]norm_factoris the normalization factor with which the input is scaled after the transformation is applied
[in]is_oddis a flag signifying if the output should be even or odd size
Returns
AF_SUCCESS if the fft transform is successful, otherwise an appropriate error code is returned.
Note
The first dimension of the output will be 2 * dim0 - 1 if is_odd is true else 2 * dim0 - 2 where dim0 is the first dimension of the input. The remaining dimensions are unchanged.

◆ fftC2R()

array af::fftC2R ( const array in,
bool  is_odd = false,
const double  norm_factor = 0 
)

C++ Interface for complex to real fast fourier transform.

Parameters
[in]inis a complex array containing only the non redundant parts of the signals
[in]is_oddis a flag signifying if the output should be even or odd size
[in]norm_factoris the normalization factor with which the input is scaled after the transformation is applied
Template Parameters
ranksignifies the dimensionality of the transform
Returns
A real array of size [2 * idim0 - 2 + is_odd, idim1, idim2, idim3] where idim{0,1,2,3} signify input dimensions