How to Call "convenc" DLL Compiled with MATLAB Library Compiler in VS2019?

Has anyone experienced compiling the MATLAB built-in function "convenc" into a DLL using the MATLAB Library Compiler and then calling it in VS2019 for development? If you have any related experience or steps to share, I would greatly appreciate it!

Answer 1

[Hitesh]

Hi Alexander,

Kindly follow the following steps to understand the process of calling "convenc" DLL Compiled with MATLAB Library Compiler in VS2019.

Prepare the MATLAB Function:

• Create a MATLAB function that calls "convenc".

function y = myConvenc(x, trellis)
    y = convenc(x, trellis);
end

• Navigate to the Apps tab and select Library Compiler.
• Choose C/C++ Shared Library as the target.
• Add the MATLAB function "myConvenc.m" to the project.
• Configure additional settings as needed, such as specifying output folder.
• Click Package to compile the function into a shared library (DLL).

Set Up Visual Studio 2019 Project, Configure Project Properties and Include MATLAB Headers:

• Right-click on the project in the Solution Explorer and select Properties.
• Under C/C++ > General > Additional Include Directories, add the path to the include folder of the MATLAB runtime.
• Under Linker > General > Additional Library Directories, add the path to the MATLAB runtime library folder.
• Under Linker > Input > Additional Dependencies, add the names of the MATLAB runtime libraries"mclmcrrt".

#include "mclmcrrt.h"
#include "myConvenc.h" 

Write C++ Code to Call the DLL:

• Initialize MATLAB Runtime

if (!mclInitializeApplication(NULL, 0)) {
    std::cerr << "Could not initialize the application." << std::endl;
    return -1;
}
if (!myConvencInitialize()) {
    std::cerr << "Could not initialize the library." << std::endl;
    return -1;
}

• Call the MATLAB Function:

mxArray *inputArray = mxCreateDoubleMatrix(1, N, mxREAL); // Example input
double *data = mxGetPr(inputArray);

mxArray *trellis = ...; 

mxArray *outputArray = nullptr;
if (!myConvenc(1, &outputArray, inputArray, trellis)) {
    std::cerr << "Error calling myConvenc function." << std::endl;
}

mxDestroyArray(inputArray);
mxDestroyArray(outputArray);

• Terminate MATLAB Runtime:

myConvencTerminate();
mclTerminateApplication();

Build and Run

• Build the Visual Studio project.
• Ensure that the MATLAB Runtime is installed on your system and that its paths are set correctly.
• Run your application to execute the "convenc" function through the DLL.

For more information regarding "convenc", kindly refer to the following MATLAB documentation,

https://www.mathworks.com/help/comm/ref/convenc.html