/*
// Copyright 2015 2016 Intel Corporation All Rights Reserved.
//
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*/
// A simple example of downsampling of the image with
// 3x3 Gaussian kernel using Intel IPP functions:
// ippiPyramidGetSize
// ippiPyramidInit
// ippiPyramidLayerDownGetSize_32f_C1R
// ippiPyramidLayerDownInit_32f_C1R
// ippiPyramidLayerDown_32f_C1R
// ippiPyramidLayerUpGetSize_32f_C1R
// ippiPyramidLayerUpInit_32f_C1R
// ippiPyramidLayerUp_32f_C1R
#include <stdio.h>
#include "ipp.h"
#define WIDTH 128 /* Image width */
#define HEIGHT 128 /* Image height */
#define KERSIZE 3 /* Kernel size */
/* 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(void)
{
int i = 0;
IppStatus status = ippStsNoErr;
Ipp32f* pSrc = NULL; /* Pointer to source image*/
int srcStep = 0; /* Step, in bytes, through the source image*/
IppiSize roiSize = { WIDTH, HEIGHT }; /* Size of source/destination ROI in pixels*/
Ipp32f rate = 2.f; /* Neighbor levels ratio*/
Ipp32f kernel[KERSIZE] = { 1.f, 1.f, 1.f }; /* Separable symmetric kernel of odd length*/
IppiPyramid *dwnPyr = NULL; /* pointer to Gaussian pyramid structure */
IppiPyramid *upPyr = NULL; /* pointer to Laplacian pyramid structure */
int pyrDwnBufferSize = 0, pyrDwnStructSize = 0;
Ipp8u* pPyrDwnBuffer = NULL, *pPyrDwnStrBuffer = NULL;
int pyrUpBufferSize = 0, pyrUpStructSize = 0;
Ipp8u* pPyrUpBuffer = NULL, *pPyrUpStrBuffer = NULL;
int level = 0;
Ipp32f *ptr = NULL;
int step = 0;
int pyrLdwnStateSize = 0;
int pyrLdwnBufferSize = 0;
Ipp8u *pPyrLdwnStateBuf = NULL;
Ipp8u *pPyrLdwnBuffer = NULL;
int pyrLupStateSize = 0;
Ipp8u *pPyrLupStateBuf = NULL;
IppiPyramidDownState_32f_C1R **dwnState = NULL;
IppiPyramidUpState_32f_C1R **upState = NULL;
Ipp32f **dwnImage = NULL;
Ipp32f **upImage = NULL;
pSrc = ippiMalloc_32f_C1(roiSize.width, roiSize.height, &srcStep);
/* Gaussian pyramid building */
/* Computes the work buffers size */
check_sts( status = ippiPyramidGetSize( &pyrDwnStructSize, &pyrDwnBufferSize, 100000, roiSize, rate) )
pPyrDwnBuffer = ippsMalloc_8u(pyrDwnBufferSize);
pPyrDwnStrBuffer = ippsMalloc_8u(pyrDwnStructSize);
/* Initializes Gaussian structure for pyramids */
check_sts( status = ippiPyramidInit ((IppiPyramid**)&dwnPyr, 100000, roiSize, rate, pPyrDwnStrBuffer, pPyrDwnBuffer) )
ippsFree(pPyrDwnBuffer); pPyrDwnBuffer = NULL;
/* Computes the work buffers size */
check_sts( status = ippiPyramidGetSize( &pyrUpStructSize, &pyrUpBufferSize, 100000, roiSize, rate) )
pPyrUpBuffer = ippsMalloc_8u(pyrUpBufferSize);
pPyrUpStrBuffer = ippsMalloc_8u(pyrUpStructSize);
/* Initializes Gaussian structure for pyramids */
check_sts( status = ippiPyramidInit ((IppiPyramid**)&upPyr, 100000, roiSize, rate, pPyrUpStrBuffer, pPyrUpBuffer) )
ippsFree(pPyrUpBuffer); pPyrUpBuffer = NULL;
{
/* Gaussian Pyramid started */
IppiSize *pRoi = dwnPyr->pRoi;
int *dwnStep = dwnPyr->pStep;
int *upStep = upPyr->pStep;
level = dwnPyr->level;
dwnImage = (Ipp32f**)(dwnPyr->pImage);
upImage = (Ipp32f**)(upPyr->pImage);
dwnState = (IppiPyramidDownState_32f_C1R**)&(dwnPyr->pState);
upState = (IppiPyramidUpState_32f_C1R**) &(upPyr->pState);
/* Computes the work buffers size */
check_sts( status = ippiPyramidLayerDownGetSize_32f_C1R(roiSize, rate, KERSIZE, &pyrLdwnStateSize, &pyrLdwnBufferSize) )
pPyrLdwnStateBuf = ippsMalloc_8u(pyrLdwnStateSize);
pPyrLdwnBuffer = ippsMalloc_8u(pyrLdwnBufferSize);
/* Allocate structures to calculate pyramid layers */
check_sts( status = ippiPyramidLayerDownInit_32f_C1R((IppiPyramidDownState_32f_C1R**)dwnState, roiSize, rate, kernel, KERSIZE, IPPI_INTER_LINEAR, pPyrLdwnStateBuf, pPyrLdwnBuffer) )
ippsFree(pPyrLdwnBuffer);
/* Computes the work buffers size */
check_sts( status = ippiPyramidLayerUpGetSize_32f_C1R(roiSize, rate, KERSIZE, &pyrLupStateSize) )
pPyrLupStateBuf = ippsMalloc_8u(pyrLdwnStateSize);
/* Allocate structures to calculate pyramid layers */
check_sts( status = ippiPyramidLayerUpInit_32f_C1R((IppiPyramidUpState_32f_C1R**)upState, roiSize, rate, kernel, KERSIZE, IPPI_INTER_LINEAR, pPyrLupStateBuf) )
/* build Gaussian pyramid with level+1 layers */
dwnImage[0] = pSrc;
dwnStep[0] = srcStep;
for (i=1; i<=level;i++)
{
dwnImage[i] = ippiMalloc_32f_C1(pRoi[i].width,pRoi[i].height,dwnStep+i);
check_sts( status = ippiPyramidLayerDown_32f_C1R(dwnImage[i-1], dwnStep[i-1], pRoi[i-1], dwnImage[i], dwnStep[i], pRoi[i], *dwnState) )
}
ptr = ippiMalloc_32f_C1(roiSize.width,roiSize.height,&step);
for (i=level-1; i>=0; i--)
{
upImage[i] = ippiMalloc_32f_C1(pRoi[i].width,pRoi[i].height,upStep+i);
check_sts( status = ippiPyramidLayerUp_32f_C1R(dwnImage[i+1], dwnStep[i+1], pRoi[i+1], ptr, step, pRoi[i], *upState) )
check_sts( status = ippiSub_32f_C1R(ptr, step, dwnImage[i], dwnStep[i], upImage[i], upStep[i], pRoi[i]) )
}
ippiFree(ptr); ptr = NULL;
}
EXIT_MAIN
/* free allocated images */
if (dwnImage)
{
for (i=1; i<=level; i++)
{
ippiFree(dwnImage[i]);
}
}
if (upImage)
{
for (i=1; i<=level; i++)
{
ippiFree(upImage[i-1]);
}
}
ippiFree(ptr);
ippsFree(pPyrDwnBuffer);
ippsFree(pPyrUpBuffer);
ippiFree(pPyrDwnStrBuffer);
ippiFree(pPyrUpStrBuffer);
ippiFree(pPyrLdwnStateBuf);
ippiFree(pPyrLupStateBuf);
ippiFree(pSrc);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return status;
}