Developer Reference for Intel® Integrated Performance Primitives 2018
Converts the data in Pack format to complex data format.
IppStatus ippsConjPack_32fc(const Ipp32f* pSrc, Ipp32fc* pDst, int lenDst);
IppStatus ippsConjPack_64fc(const Ipp64f* pSrc, Ipp64fc* pDst, int lenDst);
IppStatus ippsConjPack_32fc_I(Ipp32fc* pSrcDst, int lenDst);
IppStatus ippsConjPack_64fc_I(Ipp64fc* pSrcDst, int lenDst);
ipps.h
Headers: ippcore.h, ippvm.h
Libraries: ippcore.lib, ippvm.lib
pSrc |
Pointer to the source vector. |
pDst |
Pointer to the destination vector. |
pSrcDst |
Pointer to the source and destination vector (for the in-place operation). |
lenDst |
Number of elements in the vector. |
This function converts the data in Pack format in the vector pSrc to complex data format and stores the results in pDst.
The in-place function ippsConjPack converts the data in Pack format in the vector pSrcDst to complex data format and stores the results in pSrcDst.
The table below shows the examples of unpack from the Pack format. The Data column contains the real input data to be converted by the forward FFT transform to the packed data. The packed real data are in the Packed column. The output result is the complex data vector in the Extended column. The number of vector elements is in the Length column.
Data | Packed | Extended | Length |
---|---|---|---|
FFT([1]) | 1 | {1, 0} | 1 |
FFT([1 2]) | 3, -1 | {3, 0}, {-1, 0} | 2 |
FFT([1 2 3]) | 6, -1.5, 0.86 | {6, 0}, {-1.5, 0.86}, {-1.5, -0.86} | 3 |
FFT([1 2 3 9]) | 15, -2, 7, -7 | {15, 0}, {-2, 7}, {-7, 0}, {-2, -7} | 4 |
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when the pSrcDst, pDst, or pSrc pointer is NULL. |
ippStsSizeErr |
Indicates an error when lenDst is less than or equal to 0. |