exception handling

AutonomousMode/Input/input.cpp

@@ -22,15 +22,17 @@ Mat Input::readFile(String filePath)
     cv::glob(folder, filenames);
 
     // Random shuffle
-    std::random_shuffle(filenames.begin(), filenames.end());
+    std::random_device rd;
+    std::mt19937 g(rd());
+    std::shuffle(filenames.begin(), filenames.end(), g);
 
     Mat image = imread(filePath, IMREAD_COLOR);
     
     if(image.empty())
     {
-        std::cout << "Could not read the image: " << filePath << std::endl;
-        return Mat();
-        //To do:Exception handeling
+        stringstream sstream;
+        sstream << "Could not read the image: " << filePath << std::endl;
+        throw std::runtime_error(sstream.str());
     }
     resize(image, image, Size(this->videoWidth, this->videoHeight));
     return image;
@@ -41,13 +43,15 @@ Mat Input::readWebcam()
     Mat image;
 
     if(!cap.isOpened()) {
-        cout << "Video capture not opened" << std::endl;
-        return Mat();
+        stringstream sstream;
+        sstream << "Video capture not opened" << std::endl;
+        throw std::runtime_error(sstream.str());
     }
 
     if(!cap.grab()) {
-        cout << "Could not grab frame from camera" << std::endl;
-        return Mat();
+        stringstream sstream;
+        sstream << "Could not grab frame from camera" << std::endl;
+        throw std::runtime_error(sstream.str());
     }   
     cap.retrieve(image);
     return image;  

AutonomousMode/Input/input.h

@@ -4,6 +4,7 @@
 #include <vector>
 #include <string>
 #include <algorithm>
+#include <random>
 
 #include <opencv2/opencv.hpp>
 #include <opencv2/core/utils/logger.hpp>