1 files changed, 89 insertions, 0 deletions
diff --git a/sci_gateway1/cpp/opencv_FFT.cpp b/sci_gateway1/cpp/opencv_FFT.cpp
new file mode 100644
index 0000000..1ac386e
--- /dev/null
+++ b/sci_gateway1/cpp/opencv_FFT.cpp
@@ -0,0 +1,89 @@
+/****************************************
+Author: Sridhar Reddy
+*****************************************/
+#include <numeric>
+#include "opencv2/core/core.hpp"
+#include "opencv2/highgui/highgui.hpp"
+#include "opencv2/opencv.hpp"
+#include <iostream>
+using namespace cv;
+using namespace std;
+extern "C"
+{
+  #include "api_scilab.h"
+  #include "Scierror.h"
+  #include "BOOL.h"
+  #include <localization.h>
+  #include "sciprint.h"
+  #include "../common.h"
+  
+  int opencv_fftnew(char *fname, unsigned long fname_len)
+  {
+  	SciErr sciErr;
+    int intErr=0;
+    int iRows=0,iCols=0,i,j;
+    int *piAddr1=NULL;
+    double *ipReal=NULL;
+    double *ipImg=NULL;
+    double *rsltReal=NULL;
+    double *rsltImg=NULL;
+    vector<complex<double> > vec_out;
+    vector<double> vec_in;
+    
+  	CheckInputArgument(pvApiCtx, 1, 1);
+  	CheckOutputArgument(pvApiCtx, 1, 1) ;
+  	
+ 	sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr1);
+	if(sciErr.iErr)
+	{
+		printError(&sciErr, 0);
+		return 0;
+	}
+ 	sciErr = getMatrixOfDouble(pvApiCtx, piAddr1, &iRows, &iCols, &ipReal);
+ 	if(sciErr.iErr)
+	{
+		printError(&sciErr, 0);
+		return 0;
+	}
+	ipImg = (double*)malloc(sizeof(double) * iRows * iCols);
+	if(iRows==1){
+		for(i = 0 ; i <iCols ; i++)
+				vec_in.push_back(ipReal[i]);
+		dft(vec_in,vec_out, DFT_COMPLEX_OUTPUT);
+		for(i = 0 ; i < iCols ; i++){
+				ipReal[i]=real(vec_out[i]);
+				ipImg[i]=imag(vec_out[i]);
+			}
+		vec_in.clear();
+		vec_out.clear();
+			
+	}
+	else{
+		for(i = 0 ; i < iCols ; i++){
+			for(j = 0 ; j < iRows ; j++)
+				vec_in.push_back(ipReal[j+iCols*i]);
+			dft(vec_in,vec_out,DFT_COMPLEX_OUTPUT);
+			for(j = 0 ; j < iRows ; j++){
+				ipReal[j+iCols*i]=real(vec_out[j]);
+				ipImg[j+iCols*i]=imag(vec_out[j]);				
+			}
+			vec_in.clear();
+			vec_out.clear();
+		}
+	}
+		sciErr = allocComplexMatrixOfDouble(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRows, iCols, &rsltReal, &rsltImg);	
+		if(sciErr.iErr)
+		{
+			printError(&sciErr, 0);
+			return 0;
+		}
+		for(i = 0 ; i < iRows * iCols; i++)
+			{	
+				rsltReal[i]=ipReal[i];
+				rsltImg[i]=ipImg[i];
+			}
+		AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
+		ReturnArguments(pvApiCtx);
+		return 0;
+  }
+}