initial

src/main/java/com/jsca/CameraManager.java

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+package com.jsca;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+import javax.swing.*;
+import java.io.*;
+import java.util.*;
+
+public class CameraManager {
+    private final Map<Integer, CameraPanel> cameras = new HashMap<>();
+    private final JPanel gridPanel;
+    private static final int MAX_CAMERAS = 4;
+    private static final String CONFIG_FILE = "camera_config.json";
+    private final Gson gson;
+
+    public CameraManager(JPanel gridPanel) {
+        this.gridPanel = gridPanel;
+        this.gson = new GsonBuilder().setPrettyPrinting().create();
+        
+        // Initialize empty panels
+        for (int i = 0; i < MAX_CAMERAS; i++) {
+            CameraPanel emptyPanel = new CameraPanel("Empty " + (i + 1));
+            cameras.put(i, emptyPanel);
+            gridPanel.add(emptyPanel);
+        }
+    }
+
+    public boolean addCamera(String name, StreamReader streamReader, int position) {
+        if (position < 0 || position >= MAX_CAMERAS) {
+            return false;
+        }
+
+        CameraPanel oldPanel = cameras.get(position);
+        if (oldPanel != null) {
+            oldPanel.stopStream();
+        }
+
+        CameraPanel newPanel = new CameraPanel(name);
+        newPanel.startStream(streamReader);
+        
+        cameras.put(position, newPanel);
+        gridPanel.remove(position);
+        gridPanel.add(newPanel, position);
+        gridPanel.revalidate();
+        gridPanel.repaint();
+        
+        return true;
+    }
+
+    public void removeCamera(int position) {
+        if (position >= 0 && position < MAX_CAMERAS) {
+            CameraPanel panel = cameras.get(position);
+            if (panel != null) {
+                panel.stopStream();
+                CameraPanel emptyPanel = new CameraPanel("Empty " + (position + 1));
+                cameras.put(position, emptyPanel);
+                gridPanel.remove(position);
+                gridPanel.add(emptyPanel, position);
+                gridPanel.revalidate();
+                gridPanel.repaint();
+            }
+        }
+    }
+
+    public void stopAllCameras() {
+        for (CameraPanel panel : cameras.values()) {
+            if (panel != null) {
+                panel.stopStream();
+            }
+        }
+    }
+
+    public CameraPanel getCameraPanel(int position) {
+        return cameras.get(position);
+    }
+
+    public void restartCamera(int position) {
+        CameraPanel panel = cameras.get(position);
+        if (panel != null && panel.isStreaming()) {
+            StreamReader currentStream = panel.getCurrentStream();
+            if (currentStream != null) {
+                panel.stopStream();
+                panel.startStream(currentStream);
+            }
+        }
+    }
+
+    public void saveConfiguration() {
+        List<CameraConfig> configs = new ArrayList<>();
+        for (Map.Entry<Integer, CameraPanel> entry : cameras.entrySet()) {
+            CameraPanel panel = entry.getValue();
+            if (panel.isStreaming()) {
+                CameraConfig config = new CameraConfig();
+                config.position = entry.getKey();
+                config.name = panel.getCameraName();
+                // Add more configuration details as needed
+                configs.add(config);
+            }
+        }
+
+        try (Writer writer = new FileWriter(CONFIG_FILE)) {
+            gson.toJson(configs, writer);
+        } catch (IOException e) {
+            JOptionPane.showMessageDialog(null,
+                "Error saving configuration: " + e.getMessage(),
+                "Save Error",
+                JOptionPane.ERROR_MESSAGE);
+        }
+    }
+
+    public void loadConfiguration() {
+        try (Reader reader = new FileReader(CONFIG_FILE)) {
+            List<CameraConfig> configs = gson.fromJson(reader,
+                new TypeToken<List<CameraConfig>>(){}.getType());
+            
+            if (configs != null) {
+                stopAllCameras();
+                for (CameraConfig config : configs) {
+                    // Implement camera restoration based on config
+                    // This is a placeholder for the actual implementation
+                    // You'll need to create appropriate StreamReader instances
+                }
+            }
+        } catch (IOException e) {
+            JOptionPane.showMessageDialog(null,
+                "Error loading configuration: " + e.getMessage(),
+                "Load Error",
+                JOptionPane.ERROR_MESSAGE);
+        }
+    }
+
+    private static class CameraConfig {
+        int position;
+        String name;
+        String type; // "network" or "local"
+        String url;  // for network cameras
+        String username;
+        String password;
+        int deviceIndex; // for local cameras
+    }
+} 

src/main/java/com/jsca/CameraPanel.java

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+package com.jsca;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import javax.imageio.ImageIO;
+
+public class CameraPanel extends JPanel {
+    private final JLabel videoLabel;
+    private final String cameraName;
+    private volatile boolean isStreaming = false;
+    private StreamReader currentStream;
+
+    public CameraPanel(String cameraName) {
+        this.cameraName = cameraName;
+        setLayout(new BorderLayout());
+
+        // Create video display panel
+        videoLabel = new JLabel();
+        videoLabel.setPreferredSize(new Dimension(640, 480));
+        videoLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
+        add(videoLabel, BorderLayout.CENTER);
+
+        // Create control panel
+        JPanel controlPanel = new JPanel();
+        controlPanel.setLayout(new FlowLayout());
+
+        JButton snapshotButton = new JButton("Snapshot");
+        snapshotButton.addActionListener(e -> takeSnapshot());
+        controlPanel.add(snapshotButton);
+
+        add(controlPanel, BorderLayout.SOUTH);
+    }
+
+    public void startStream(StreamReader streamReader) {
+        stopStream(); // Stop any existing stream
+        currentStream = streamReader;
+        new Thread(currentStream).start();
+        isStreaming = true;
+    }
+
+    public void stopStream() {
+        if (currentStream != null) {
+            currentStream.stop();
+            currentStream = null;
+        }
+        isStreaming = false;
+        videoLabel.setIcon(null);
+    }
+
+    private void takeSnapshot() {
+        if (videoLabel.getIcon() == null) return;
+
+        try {
+            BufferedImage image = new BufferedImage(
+                videoLabel.getWidth(),
+                videoLabel.getHeight(),
+                BufferedImage.TYPE_INT_RGB
+            );
+            Graphics g = image.getGraphics();
+            videoLabel.paint(g);
+            g.dispose();
+
+            String timestamp = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss"));
+            File outputFile = new File(String.format("snapshot_%s_%s.jpg", cameraName.replaceAll("[^a-zA-Z0-9]", "_"), timestamp));
+            ImageIO.write(image, "jpg", outputFile);
+            JOptionPane.showMessageDialog(this, 
+                "Snapshot saved: " + outputFile.getName(),
+                "Snapshot Saved",
+                JOptionPane.INFORMATION_MESSAGE);
+        } catch (Exception e) {
+            JOptionPane.showMessageDialog(this,
+                "Error saving snapshot: " + e.getMessage(),
+                "Error",
+                JOptionPane.ERROR_MESSAGE);
+        }
+    }
+
+    public void updateFrame(Image frame) {
+        if (frame != null) {
+            videoLabel.setIcon(new ImageIcon(frame));
+        }
+    }
+
+    public String getCameraName() {
+        return cameraName;
+    }
+
+    public boolean isStreaming() {
+        return isStreaming;
+    }
+
+    public StreamReader getCurrentStream() {
+        return currentStream;
+    }
+} 

src/main/java/com/jsca/CameraViewer.java

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+package com.jsca;
+
+import com.github.sarxos.webcam.Webcam;
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+
+public class CameraViewer extends JFrame {
+    private final JPanel gridPanel;
+    private final CameraManager cameraManager;
+    private final JLabel statusLabel;
+
+    public CameraViewer() {
+        setTitle("Security Camera Viewer");
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setPreferredSize(new Dimension(1280, 960));
+
+        // Create grid panel for cameras
+        gridPanel = new JPanel(new GridLayout(2, 2, 5, 5));
+        gridPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
+
+        // Create status bar
+        statusLabel = new JLabel("Ready");
+        statusLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
+
+        // Initialize camera manager
+        cameraManager = new CameraManager(gridPanel);
+
+        // Create menu bar
+        setJMenuBar(createMenuBar());
+
+        // Add components to frame
+        add(gridPanel, BorderLayout.CENTER);
+        add(statusLabel, BorderLayout.SOUTH);
+
+        // Add window listener for cleanup
+        addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                cameraManager.stopAllCameras();
+            }
+        });
+
+        pack();
+        setLocationRelativeTo(null);
+    }
+
+    private JMenuBar createMenuBar() {
+        JMenuBar menuBar = new JMenuBar();
+
+        // File Menu
+        JMenu fileMenu = new JMenu("File");
+        JMenuItem loadSetup = new JMenuItem("Load Camera Setup");
+        JMenuItem saveSetup = new JMenuItem("Save Camera Setup");
+        JMenuItem exit = new JMenuItem("Exit");
+
+        loadSetup.addActionListener(e -> cameraManager.loadConfiguration());
+        saveSetup.addActionListener(e -> cameraManager.saveConfiguration());
+        exit.addActionListener(e -> {
+            cameraManager.stopAllCameras();
+            dispose();
+        });
+
+        fileMenu.add(loadSetup);
+        fileMenu.add(saveSetup);
+        fileMenu.addSeparator();
+        fileMenu.add(exit);
+
+        // Camera Menu
+        JMenu cameraMenu = new JMenu("Camera");
+        JMenuItem addNetwork = new JMenuItem("Add Network Camera");
+        JMenuItem addLocal = new JMenuItem("Add Local Camera");
+        JMenuItem removeCamera = new JMenuItem("Remove Camera");
+        JMenuItem restartCamera = new JMenuItem("Restart Camera");
+
+        addNetwork.addActionListener(e -> addNetworkCamera());
+        addLocal.addActionListener(e -> addLocalCamera());
+        removeCamera.addActionListener(e -> removeSelectedCamera());
+        restartCamera.addActionListener(e -> restartSelectedCamera());
+
+        cameraMenu.add(addNetwork);
+        cameraMenu.add(addLocal);
+        cameraMenu.addSeparator();
+        cameraMenu.add(removeCamera);
+        cameraMenu.add(restartCamera);
+
+        // Help Menu
+        JMenu helpMenu = new JMenu("Help");
+        JMenuItem about = new JMenuItem("About");
+        JMenuItem instructions = new JMenuItem("Instructions");
+
+        about.addActionListener(e -> showAboutDialog());
+        instructions.addActionListener(e -> showInstructions());
+
+        helpMenu.add(about);
+        helpMenu.add(instructions);
+
+        menuBar.add(fileMenu);
+        menuBar.add(cameraMenu);
+        menuBar.add(helpMenu);
+
+        return menuBar;
+    }
+
+    private void addNetworkCamera() {
+        JPanel panel = new JPanel(new GridLayout(0, 2, 5, 5));
+        JTextField urlField = new JTextField();
+        JTextField usernameField = new JTextField();
+        JPasswordField passwordField = new JPasswordField();
+        SpinnerNumberModel positionModel = new SpinnerNumberModel(0, 0, 3, 1);
+        JSpinner positionSpinner = new JSpinner(positionModel);
+
+        panel.add(new JLabel("URL:"));
+        panel.add(urlField);
+        panel.add(new JLabel("Username:"));
+        panel.add(usernameField);
+        panel.add(new JLabel("Password:"));
+        panel.add(passwordField);
+        panel.add(new JLabel("Position (0-3):"));
+        panel.add(positionSpinner);
+
+        int result = JOptionPane.showConfirmDialog(this, panel,
+            "Add Network Camera", JOptionPane.OK_CANCEL_OPTION);
+
+        if (result == JOptionPane.OK_OPTION) {
+            String url = urlField.getText();
+            int position = (Integer) positionSpinner.getValue();
+
+            if (!url.trim().isEmpty()) {
+                String name = "Network Camera " + (position + 1);
+                NetworkStreamReader reader = new NetworkStreamReader(
+                    cameraManager.getCameraPanel(position),
+                    url
+                );
+                cameraManager.addCamera(name, reader, position);
+                updateStatus("Added network camera at position " + position);
+            }
+        }
+    }
+
+    private void addLocalCamera() {
+        java.util.List<Webcam> webcams = Webcam.getWebcams();
+        if (webcams.isEmpty()) {
+            JOptionPane.showMessageDialog(this,
+                "No webcams detected",
+                "Error",
+                JOptionPane.ERROR_MESSAGE);
+            return;
+        }
+
+        JPanel panel = new JPanel(new GridLayout(0, 2, 5, 5));
+        String[] options = webcams.stream()
+            .map(Webcam::getName)
+            .toArray(String[]::new);
+        JComboBox<String> webcamBox = new JComboBox<>(options);
+        SpinnerNumberModel positionModel = new SpinnerNumberModel(0, 0, 3, 1);
+        JSpinner positionSpinner = new JSpinner(positionModel);
+
+        panel.add(new JLabel("Select Webcam:"));
+        panel.add(webcamBox);
+        panel.add(new JLabel("Position (0-3):"));
+        panel.add(positionSpinner);
+
+        int result = JOptionPane.showConfirmDialog(this, panel,
+            "Add Local Camera", JOptionPane.OK_CANCEL_OPTION);
+
+        if (result == JOptionPane.OK_OPTION) {
+            String selected = (String) webcamBox.getSelectedItem();
+            int position = (Integer) positionSpinner.getValue();
+
+            if (selected != null) {
+                String name = "Local Camera " + (position + 1) + " (" + selected + ")";
+                WebcamStreamReader reader = new WebcamStreamReader(
+                    cameraManager.getCameraPanel(position)
+                );
+                cameraManager.addCamera(name, reader, position);
+                updateStatus("Added local camera at position " + position);
+            }
+        }
+    }
+
+    private void removeSelectedCamera() {
+        SpinnerNumberModel positionModel = new SpinnerNumberModel(0, 0, 3, 1);
+        JSpinner positionSpinner = new JSpinner(positionModel);
+
+        int result = JOptionPane.showConfirmDialog(this,
+            positionSpinner,
+            "Select Camera Position to Remove (0-3)",
+            JOptionPane.OK_CANCEL_OPTION);
+
+        if (result == JOptionPane.OK_OPTION) {
+            int position = (Integer) positionSpinner.getValue();
+            cameraManager.removeCamera(position);
+            updateStatus("Removed camera at position " + position);
+        }
+    }
+
+    private void restartSelectedCamera() {
+        SpinnerNumberModel positionModel = new SpinnerNumberModel(0, 0, 3, 1);
+        JSpinner positionSpinner = new JSpinner(positionModel);
+
+        int result = JOptionPane.showConfirmDialog(this,
+            positionSpinner,
+            "Select Camera Position to Restart (0-3)",
+            JOptionPane.OK_CANCEL_OPTION);
+
+        if (result == JOptionPane.OK_OPTION) {
+            int position = (Integer) positionSpinner.getValue();
+            cameraManager.restartCamera(position);
+            updateStatus("Restarted camera at position " + position);
+        }
+    }
+
+    private void showAboutDialog() {
+        JOptionPane.showMessageDialog(this,
+            "Security Camera Viewer\nVersion 1.0\n\n" +
+            "A multi-camera security monitoring application\n" +
+            "Supports both network and local USB cameras",
+            "About",
+            JOptionPane.INFORMATION_MESSAGE);
+    }
+
+    private void showInstructions() {
+        JOptionPane.showMessageDialog(this,
+            "Instructions:\n\n" +
+            "1. Use the Camera menu to add network or local cameras\n" +
+            "2. Select a position (0-3) for each camera\n" +
+            "3. Use the File menu to save/load your camera setup\n" +
+            "4. Each camera panel has its own snapshot button\n\n" +
+            "Network Camera URLs should be in MJPEG format\n" +
+            "Example: http://camera-ip:port/video",
+            "Instructions",
+            JOptionPane.INFORMATION_MESSAGE);
+    }
+
+    private void updateStatus(String message) {
+        statusLabel.setText(message);
+    }
+} 

src/main/java/com/jsca/Main.java

@@ -0,0 +1,12 @@
+package com.jsca;
+
+import javax.swing.SwingUtilities;
+
+public class Main {
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            CameraViewer viewer = new CameraViewer();
+            viewer.setVisible(true);
+        });
+    }
+} 

src/main/java/com/jsca/NetworkStreamReader.java

@@ -0,0 +1,109 @@
+package com.jsca;
+
+import javax.imageio.ImageIO;
+import javax.swing.SwingUtilities;
+import java.awt.Image;
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.util.Arrays;
+
+public class NetworkStreamReader implements StreamReader {
+    private final CameraPanel panel;
+    private final String streamUrl;
+    private volatile boolean running = true;
+    private HttpURLConnection connection;
+
+    public NetworkStreamReader(CameraPanel panel, String streamUrl) {
+        this.panel = panel;
+        this.streamUrl = streamUrl;
+    }
+
+    @Override
+    public void run() {
+        try {
+            URL url = new URL(streamUrl);
+            connection = (HttpURLConnection) url.openConnection();
+            connection.setConnectTimeout(5000);
+            connection.setReadTimeout(5000);
+
+            try (BufferedInputStream in = new BufferedInputStream(connection.getInputStream())) {
+                byte[] buffer = new byte[8192];
+                int bytesRead;
+                byte[] imageBuffer = new byte[1024 * 1024]; // 1MB buffer for JPEG
+                int imagePos = 0;
+                boolean foundHeader = false;
+
+                while (running) {
+                    bytesRead = in.read(buffer);
+                    if (bytesRead == -1) break;
+
+                    for (int i = 0; i < bytesRead; i++) {
+                        // Look for JPEG header (0xFF, 0xD8)
+                        if (!foundHeader && i < bytesRead - 1) {
+                            if (buffer[i] == (byte) 0xFF && buffer[i + 1] == (byte) 0xD8) {
+                                imagePos = 0;
+                                foundHeader = true;
+                            }
+                        }
+
+                        if (foundHeader) {
+                            imageBuffer[imagePos++] = buffer[i];
+
+                            // Look for JPEG footer (0xFF, 0xD9)
+                            if (imagePos > 1 && 
+                                imageBuffer[imagePos - 2] == (byte) 0xFF && 
+                                imageBuffer[imagePos - 1] == (byte) 0xD9) {
+                                
+                                // We have a complete JPEG image
+                                byte[] imageData = Arrays.copyOf(imageBuffer, imagePos);
+                                processImage(imageData);
+                                foundHeader = false;
+                            }
+
+                            if (imagePos >= imageBuffer.length) {
+                                // Buffer overflow, reset
+                                foundHeader = false;
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Exception e) {
+            if (running) {
+                SwingUtilities.invokeLater(() -> {
+                    javax.swing.JOptionPane.showMessageDialog(panel,
+                        "Error reading from network camera: " + e.getMessage(),
+                        "Network Camera Error",
+                        javax.swing.JOptionPane.ERROR_MESSAGE);
+                });
+            }
+        } finally {
+            if (connection != null) {
+                connection.disconnect();
+            }
+        }
+    }
+
+    private void processImage(byte[] imageData) {
+        try {
+            Image image = ImageIO.read(new ByteArrayInputStream(imageData));
+            if (image != null) {
+                SwingUtilities.invokeLater(() -> panel.updateFrame(image));
+            }
+            Thread.sleep(33); // ~30 FPS
+        } catch (IOException | InterruptedException e) {
+            // Ignore individual frame errors
+        }
+    }
+
+    @Override
+    public void stop() {
+        running = false;
+        if (connection != null) {
+            connection.disconnect();
+        }
+    }
+} 

src/main/java/com/jsca/StreamReader.java

@@ -0,0 +1,5 @@
+package com.jsca;
+
+public interface StreamReader extends Runnable {
+    void stop();
+} 

src/main/java/com/jsca/WebcamStreamReader.java

@@ -0,0 +1,53 @@
+package com.jsca;
+
+import com.github.sarxos.webcam.Webcam;
+import java.awt.Dimension;
+import java.awt.Image;
+import javax.swing.SwingUtilities;
+
+public class WebcamStreamReader implements StreamReader {
+    private final CameraPanel panel;
+    private volatile boolean running = true;
+    private Webcam webcam;
+
+    public WebcamStreamReader(CameraPanel panel) {
+        this.panel = panel;
+    }
+
+    @Override
+    public void run() {
+        try {
+            webcam = Webcam.getDefault();
+            if (webcam == null) {
+                throw new RuntimeException("No webcam detected");
+            }
+
+            webcam.setViewSize(new Dimension(640, 480));
+            webcam.open();
+
+            while (running && webcam.isOpen()) {
+                final Image image = webcam.getImage();
+                if (image != null) {
+                    SwingUtilities.invokeLater(() -> panel.updateFrame(image));
+                }
+                Thread.sleep(33); // ~30 FPS
+            }
+        } catch (Exception e) {
+            SwingUtilities.invokeLater(() -> {
+                javax.swing.JOptionPane.showMessageDialog(panel,
+                    "Error reading from webcam: " + e.getMessage(),
+                    "Webcam Error",
+                    javax.swing.JOptionPane.ERROR_MESSAGE);
+            });
+        } finally {
+            if (webcam != null && webcam.isOpen()) {
+                webcam.close();
+            }
+        }
+    }
+
+    @Override
+    public void stop() {
+        running = false;
+    }
+}