ConjPack
ConjPack
Converts the data in
Pack
format to complex data format.
Syntax
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
);
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).
- lenDst
- Number of elements in the vector.
Description
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 |
Return Values
- ippStsNoErr
- Indicates no error.
- ippStsNullPtrErr
- Indicates an error when thepSrcDst,pDst, orpSrcpointer isNULL.
- ippStsSizeErr
- Indicates an error whenlenDstis less than or equal to 0.
Example
/******************************************************************************* * Copyright 2015-2020 Intel Corporation. * * This software and the related documents are Intel copyrighted materials, and * your use of them is governed by the express license under which they were * provided to you (License). Unless the License provides otherwise, you may not * use, modify, copy, publish, distribute, disclose or transmit this software or * the related documents without Intel's prior written permission. * * This software and the related documents are provided as is, with no express * or implied warranties, other than those that are expressly stated in the * License. *******************************************************************************/ #include <stdio.h> #include "ipp.h" /* Next two defines are created to simplify code reading and understanding */ #define EXIT_MAIN exitLine: /* Label for Exit */ #define check_sts(st) if((st) != ippStsNoErr) goto exitLine; /* Go to Exit if Intel(R) Integrated Primitives (Intel(R) IPP) function returned status different from ippStsNoErr */ int main(void) { IppStatus status; Ipp32f x[8] = {1,2,3,5,6,7,8,9}; Ipp32fc zero={0,0}, y[6] = {0}; int i = 0; check_sts( status = ippsSet_32fc( zero, y, 6 ) ) check_sts( status = ippsConjPack_32fc( x, y, 6 ) ) for (i = 0; i < 6; i++) { printf("{%.3f %.3f} ",y[i].re,y[i].im); } printf("\n"); check_sts( status = ippsSet_32fc( zero, y, 6 ) ) check_sts( status = ippsConjPack_32fc( x, y, 5 ) ) for (i = 0; i < 5; i++) { printf("{%.3f %.3f} ",y[i].re,y[i].im); } printf("\n"); EXIT_MAIN printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status)); return (int)status; }