/*
// Copyright 2015 2016 Intel Corporation All Rights Reserved.
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*/
// A simple example of computing the affine coefficients for the transform
// that rotates an image using Intel IPP functions:
// ippiGetRotateTransform
// ippiWarpAffineLinearInit
// ippiWarpGetBufferSize
// ippiWarpAffineLinear_8u_C3R
#include <stdio.h>
#include "ipp.h"
#define WIDTH 64 /* source image width */
#define HEIGHT 64 /* source image height */
#define NUM_CHN 3
/* 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)
{
IppStatus status = ippStsNoErr;
IppiWarpSpec* pSpec = NULL; /* Pointer to the specification structure */
IppiSize srcSize = { WIDTH, HEIGHT }, dstSize = { WIDTH, HEIGHT }; /* Size of source/destination images */
int srcStep, dstStep; /* Steps, in bytes, through the source/destination images */
Ipp8u* pSrc = NULL, *pDst = NULL; /* Pointers to source/destination images */
double angle = 30., xShift = 2., yShift = 1.;
double coeffs[2][3] = {0};
IppiPoint dstOffset = { 0, 0 }; /* Offset of the destination image ROI with respect to the destination image origin */
int specSize = 0, initSize = 0, bufSize = 0; /* Work buffer size */
Ipp8u* pBuffer = NULL;
IppiBorderType borderType = ippBorderConst;
IppiWarpDirection direction = ippWarpForward; /* Transformation direction */
Ipp64f pBorderValue[NUM_CHN] = {0};
pSrc = ippiMalloc_8u_C3(srcSize.width, srcSize.height, &srcStep);
pDst = ippiMalloc_8u_C3(dstSize.width, dstSize.height, &dstStep);
check_sts( status = ippiGetRotateTransform(angle, xShift, yShift, (double(*)[3])coeffs) )
/* Spec and init buffer sizes */
check_sts( status = ippiWarpAffineGetSize(srcSize, dstSize, ipp8u, coeffs, ippLinear, direction, borderType, &specSize, &initSize) )
pSpec = (IppiWarpSpec*)ippsMalloc_8u(specSize);
/* Filter initialization */
check_sts( status = ippiWarpAffineLinearInit(srcSize, dstSize, ipp8u, coeffs, direction, NUM_CHN, borderType, pBorderValue, 0, pSpec) )
/* Get work buffer size */
check_sts( status = ippiWarpGetBufferSize(pSpec, dstSize, &bufSize) )
pBuffer = ippsMalloc_8u(bufSize);
/* WarpAffine processing */
check_sts( status = ippiWarpAffineLinear_8u_C3R(pSrc, srcStep, pDst, dstStep, dstOffset, dstSize, pSpec, pBuffer) )
EXIT_MAIN
ippiFree(pSrc);
ippiFree(pDst);
ippsFree(pBuffer);
ippsFree( pSpec);
printf("Exit status %d (%s)\n", (int)status, ippGetStatusString(status));
return (int)status;
}