WinHann
WinHann
Multiplies a vector by a Hann windowing function.
Syntax
IppStatus ippsWinHann_16s(const Ipp16s*
pSrc
, Ipp16s*
pDst
, int
len
);
IppStatus ippsWinHann_16sc(const Ipp16sc*
pSrc
, Ipp16sc*
pDst
, int
len
);
IppStatus ippsWinHann_32f(const Ipp32f*
pSrc
, Ipp32f*
pDst
, int
len
);
IppStatus ippsWinHann_32fc(const Ipp32fc*
pSrc
, Ipp32fc*
pDst
, int
len
);
IppStatus ippsWinHann_64f(const Ipp64f*
pSrc
, Ipp64f*
pDst
, int
len
);
IppStatus ippsWinHann_64fc(const Ipp64fc*
pSrc
, Ipp64fc*
pDst
, int
len
);
IppStatus ippsWinHann_16s_I(Ipp16s*
pSrcDst
, int
len
);
IppStatus ippsWinHann_16sc_I(Ipp16sc*
pSrcDst
, int
len
);
IppStatus ippsWinHann_32f_I(Ipp32f*
pSrcDst
, int
len
);
IppStatus ippsWinHann_32fc_I(Ipp32fc*
pSrcDst
, int
len
);
IppStatus ippsWinHann_64f_I(Ipp64f*
pSrcDst
, int
len
);
IppStatus ippsWinHann_64fc_I(Ipp64fc*
pSrcDst
, int
len
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
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
This function multiplies the vector
pSrc
by the Hann window and stores the result in pDst
.The in-place flavors of
ippsWinHann
multiply the vector pSrcDst
by the Hann 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 Hann window is defined as follows:
Return Values
- ippStsNoErr
- Indicates no error.
- ippStsNullPtrErr
- Indicates an error when thepSrc,pDst, orpSrcDstpointer isNULL.
- ippStsSizeErr
- Indicates an error whenlenis less than 3.
Example
The example below shows how to use the function
ippsWinHann_32f_I
void hann(void) { Ipp32f x[8]; ippsSet_32f(1, x, 8); ippsWinHann_32f_I(x, 8); printf_32f(“hann(half) =”, x, 4, ippStsNoErr); }
Output:
hann(half) = 0.000000 0.188255 0.611260 0.950484 Matlab* Analog: >> N = 8; n = 0:N-1; 0.5*(1-cos(2*pi*n/(N-1)))