/*
// Copyright 2014 2016 Intel Corporation All Rights Reserved.
//
// The source code, information and material ("Material") contained herein is
// owned by Intel Corporation or its suppliers or licensors, and title
// to such Material remains with Intel Corporation or its suppliers or
// licensors. The Material contains proprietary information of Intel
// or its suppliers and licensors. The Material is protected by worldwide
// copyright laws and treaty provisions. No part of the Material may be used,
// copied, reproduced, modified, published, uploaded, posted, transmitted,
// distributed or disclosed in any way without Intel's prior express written
// permission. No license under any patent, copyright or other intellectual
// property rights in the Material is granted to or conferred upon you,
// either expressly, by implication, inducement, estoppel or otherwise.
// Any license under such intellectual property rights must be express and
// approved by Intel in writing.
//
// Unless otherwise agreed by Intel in writing,
// you may not remove or alter this notice or any other notice embedded in
// Materials by Intel or Intel's suppliers or licensors in any way.
//
*/
#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 IPP function returned status different from ippStsNoErr */
/* Results of ippMalloc() are not validated because Intel(R) Integrated Performance Primitives functions perform bad arguments check and will return an appropriate status */
int main()
{
int len = 512;
Ipp64f pDst[512];
Ipp64f magn = 4095;
Ipp64f rLowFreq = 0.2;
Ipp64f rHighFreq = 0.3;
int tapslen = 27;
int numIters = 512;
IppsFIRSpec_64f* pSpec = NULL;
IppStatus status = ippStsNoErr;
int i = 0, bufSize = 0, specSize = 0;
Ipp8u* pBuffer = NULL;
IppAlgType algType = ippAlgDirect;
Ipp64f* pDlySrc = NULL;
Ipp64f* pDlyDst = NULL;
Ipp64f* FIRDst = ippsMalloc_64f(numIters * sizeof(Ipp64f));
Ipp64f* taps = ippsMalloc_64f(tapslen*sizeof(Ipp64f));
pDlySrc = ippsMalloc_64f(tapslen*sizeof(Ipp64f));
check_sts( status = ippsZero_64f(pDlySrc, tapslen) )
/* generate source vector */
check_sts( status = ippsVectorJaehne_64f(pDst, len, magn) ) /* create a Jaehne vector */
printf("\nSource vector\n");
for (i = 0; i < 32; i++) printf("%f,", pDst[i]);
/* computes tapsLen coefficients for lowpass FIR filter */
check_sts( status = ippsFIRGenGetBufferSize(tapslen, &bufSize) )
pBuffer = ippsMalloc_8u(bufSize);
check_sts( status = ippsFIRGenBandpass_64f(rLowFreq, rHighFreq, taps, tapslen, ippWinBartlett, ippTrue, pBuffer) )
printf("\nGenerated taps:\n");
for (i = 0; i < tapslen; i++) printf("%f,", taps[i]);
check_sts( status = ippsFIRSRGetSize(tapslen, ipp64f, &specSize, &bufSize) )
pSpec = (IppsFIRSpec_64f*)ippsMalloc_8u(specSize);
pBuffer = ippsMalloc_8u(bufSize);
check_sts( status = ippsFIRSRInit_64f(taps, tapslen, algType, pSpec) )
/*filter an input vector*/
check_sts( status = ippsFIRSR_64f(pDst, FIRDst, numIters, pSpec, pDlySrc, pDlyDst, pBuffer) )
printf("\nAfter LowPass filter\n");
for (i = 0; i < 32; i++) printf("%f,", FIRDst[i]);
printf("\n\n");
EXIT_MAIN
ippsFree(FIRDst);
ippsFree(taps);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return 0;
}