DFTOutOrdGetBufSize

Computes the size of the work buffer for out-of-order discrete Fourier transform.

Syntax

IppStatus ippsDFTOutOrdGetBufSize_C_32fc(const IppsDFTOutOrdSpec_C_32fc* pDFTSpec, int* pSize);

IppStatus ippsDFTOutOrdGetBufSize_C_64fc(const IppsDFTOutOrdSpec_C_64fc* pDFTSpec, int* pSize);

Parameters

pDFTSpec	Pointer to the DFT specification structure.
pSize	Pointer to the DFT work buffer size value.

Description

The function ippsDFTOutOrdGetBufSize is declared in the ipps.h file. This function computes the size in bytes of an external memory buffer for the out-of-order DFT described by the specification structure pDFTSpec and stores it in pSize.

To use external buffering, call this function after pDFTSpec initialization.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when pDFTSpec is NULL.
ippStsContextMatchErr	Indicates an error when the specification identifier pDFTSpec is incorrect.