WinHamming

Multiplies a vector by a Hamming windowing function.

Syntax

IppStatus ippsWinHamming_16s(const Ipp16s* pSrc, Ipp16s* pDst, int len);

IppStatus ippsWinHamming_32f(const Ipp32f* pSrc, Ipp32f* pDst, int len);

IppStatus ippsWinHamming_64f(const Ipp64f* pSrc, Ipp64f* pDst, int len);

IppStatus ippsWinHamming_16sc(const Ipp16sc* pSrc, Ipp16sc* pDst, int len);

IppStatus ippsWinHamming_32fc(const Ipp32fc* pSrc, Ipp32fc* pDst, int len);

IppStatus ippsWinHamming_64fc(const Ipp64fc* pSrc, Ipp64fc* pDst, int len);

IppStatus ippsWinHamming_16s_I(Ipp16s* pSrcDst, int len);

IppStatus ippsWinHamming_32f_I(Ipp32f* pSrcDst, int len);

IppStatus ippsWinHamming_64f_I(Ipp64f* pSrcDst, int len);

IppStatus ippsWinHamming_16sc_I(Ipp16sc* pSrcDst, int len);

IppStatus ippsWinHamming_32fc_I(Ipp32fc* pSrcDst, int len);

IppStatus ippsWinHamming_64fc_I(Ipp64fc* pSrcDst, int len);

Parameters

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.
len	Number of elements in the vector.

Description

The function ippsWinHamming is declared in the ipps.h file. This function multiplies the vector pSrc by the Hamming window and stores the result in pDst.

The in-place flavors of ippsWinHamming multiply the vector pSrcDst by the Hamming window and store the result in pSrcDst.

The complex types multiply both the real and imaginary parts of the vector by the same window. The Hamming window is defined as follows:

The example below shows how to use the function ippsWinHamming_32f_I.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when the pSrc, pDst, or pSrcDst pointer is NULL.
ippStsSizeErr	Indicates an error when len is less than 3.

Using the ippsWinHamming Function

void hamming(void) {
      Ipp32f x[8];
      ippsSet_32f(1, x, 8);
      ippsWinHamming_32f_I(x, 8);
      printf_32f(“hamming(half) =”, x, 4, ippStsNoErr);
}
Output: 
    hamming(half) =  0.080000 0.253195 0.642360 0.954446
Matlab* Analog: 
    >> b = hamming(8); b(1:4)'