DCTFwdGetSize, DCTInvGetSize

Compute the size of the DCT context structure and the size of the required work buffers.

Syntax

IppStatus ippiDCTFwdGetSize_32f (IppiSize roiSize, int* pSizeSpec, int* pSizeInit, int* pSizeBuf);

IppStatus ippiDCTInvGetSize_32f (IppiSize roiSize, int* pSizeSpec, int* pSizeInit, int* pSizeBuf);

ippi.h

Headers: ippcore.h, ippvm.h, ipps.h

Libraries: ippcore.lib, ippvm.lib, ipps.lib

roiSize	Size of the source and destination ROI, in pixels.
pSizeSpec	Pointer to the size of the DCT context structure.
pSizeInit	Pointer to the size of the buffer for the DCT initialization function.
pSizeBuf	Pointer to the size of the DCT external work buffer.

These functions compute the following:

Size of the DCT context structure. The result, in bytes, is stored in the pSizeSpec parameter.
Size of the work buffer for the ippiDCTFwdInit and ippiDCTInvInit functions. The result, in bytes, is stored in the pSizeInit parameter.
Size of the work buffer for the ippiDCTFwd and ippiDCTInv functions. The result, in bytes, is stored in the pSizeBuf parameter.

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointers is `NULL`.
ippStsSizeErr	Indicates an error when roiSize has a field with a zero or negative value.