Visible to Intel only — GUID: GUID-25012C7A-EAFB-411A-A814-9D303D949AB8
Visible to Intel only — GUID: GUID-25012C7A-EAFB-411A-A814-9D303D949AB8
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 is 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 the pSrcDst, pDst, or pSrc pointer is NULL. |
ippStsSizeErr |
Indicates an error when lenDst is less than or equal to 0. |
Example
/*******************************************************************************
* Copyright 2015 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 Performance 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;
}