Intel® Integrated Performance Primitives Developer Reference

Developer Reference

  • 2021
  • 01/15/2021
  • Public Content
Contents

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 the
pSrc
,
pDst
, or
pSrcDst
 pointer is
NULL
.
ippStsSizeErr
Indicates an error when
len
 is 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)))

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.