initial commit ; currently it wont build :C

src/main/java/org/jdetect/ModelLoader.java

@@ -0,0 +1,77 @@
+package org.jdetect;
+
+import org.opencv.core.*;
+import org.opencv.dnn.Dnn;
+import org.opencv.dnn.Net;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+
+public class ModelLoader {
+    private static Net net;
+    private static List<String> classes;
+    private static List<String> outputLayers;
+
+    public static synchronized void loadModel() throws IOException {
+        if (net != null) return;
+
+        // Load network
+        InputStream weightsStream = ModelLoader.class.getResourceAsStream("/yolov4-tiny.weights");
+        InputStream configStream = ModelLoader.class.getResourceAsStream("/yolov4-tiny.cfg");
+
+        assert weightsStream != null;
+        byte[] weights = weightsStream.readAllBytes();
+        assert configStream != null;
+        byte[] config = configStream.readAllBytes();
+
+        // Create temp files
+        String weightsPath = "temp_weights.weights";
+        String configPath = "temp_config.cfg";
+
+        Files.write(Paths.get(weightsPath), weights);
+        Files.write(Paths.get(configPath), config);
+
+        net = Dnn.readNetFromDarknet(configPath, weightsPath);
+
+        // Load classes
+        classes = new ArrayList<>();
+        try (InputStream classesStream = ModelLoader.class.getResourceAsStream("/coco.names")) {
+            assert classesStream != null;
+            try (BufferedReader br = new BufferedReader(new InputStreamReader(classesStream))) {
+                String line;
+                while ((line = br.readLine()) != null) {
+                    classes.add(line.trim());
+                }
+            }
+        }
+
+        // Get output layers
+        List<String> layerNames = net.getLayerNames();
+        MatOfInt unconnectedOutLayers = net.getUnconnectedOutLayers();
+        int[] indices = unconnectedOutLayers.toArray();
+
+        outputLayers = new ArrayList<>();
+        for (int idx : indices) {
+            outputLayers.add(layerNames.get(idx - 1));
+        }
+    }
+
+    public static Net getNet() {
+        return net;
+    }
+
+    public static List<String> getClasses() {
+        return classes;
+    }
+
+    public static List<String> getOutputLayers() {
+        return outputLayers;
+    }
+}