How to use decomposeHomographyMat from openCV in Matlab

Hi, I am using mexopencv to use openCV's function decomposeHomographyMat in Matlab. I have calculated H(3x3) and K(3x3) matrix. Then I have written homography2RotTrans.cpp file consisting of all functions. But I am having a lot of troubles. homography2RotTrans is not accepting the inputs as well as i cannot convert the output of homography2RotTrans onto Matlab readable format. My .cpp code is below. Plz help

#include "opencvmex.hpp"

using namespace cv;

void checkInputs(int nrhs, const mxArray *prhs[]) { if (nrhs != 1) { mexErrMsgTxt("Incorrect number of inputs. Function expects 2 inputs."); }

    if (!mxIsUint8(prhs[0]))
    {       
        mexErrMsgTxt("Input image must be uint8.");
    }
}

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {

    checkInputs(nrhs, prhs);

    // inputs
    cv::Ptr<cv::Mat> H = ocvMxArrayToMat_double(prhs[0], true);
    cv::Ptr<cv::Mat> K = ocvMxArrayToMat_double(prhs[1], true);

    std::vector<cv::Mat> Rs_decomp, ts_decomp, normals_decomp;
    int solutions = decomposeHomographyMat(H, K, Rs_decomp, ts_decomp, normals_decomp);

    // populate the outputs
    plhs[0] = ocvMxArrayFromMat_double(Rs_decomp); 
    plhs[1] = ocvMxArrayFromMat_double(ts_decomp); 
    plhs[2] = ocvMxArrayFromMat_double(normals_decomp); 
}