Initial commit

src/ve/ucv/ciens/ccg/nxtcam/camera/CameraImageMonitor.java

@@ -0,0 +1,54 @@
+package ve.ucv.ciens.ccg.nxtcam.camera;
+
+import ve.ucv.ciens.ccg.nxtcam.utils.Logger;
+
+public class CameraImageMonitor{
+	private final String TAG = "CAM_MONITOR";
+	private final String CLASS_NAME = CameraImageMonitor.class.getSimpleName();
+
+	private byte[] image;
+	private boolean imgChanged;
+
+	private CameraImageMonitor(){
+		imgChanged = false;
+	}
+
+	private static class SingletonHolder{
+		public static final CameraImageMonitor INSTANCE = new CameraImageMonitor();
+	}
+
+	public static CameraImageMonitor getInstance(){
+		return SingletonHolder.INSTANCE;
+	}
+
+	public void setImageData(byte[] image){
+		Logger.log(Logger.LOG_TYPES.DEBUG, TAG, CLASS_NAME + ".setImageData() :: Copying new image.");
+		synchronized(image){
+			this.image = new byte[image.length];
+			System.arraycopy(image, 0, this.image, 0, image.length);
+			imgChanged = true;
+			image.notifyAll();
+		}
+		Logger.log(Logger.LOG_TYPES.DEBUG, TAG, CLASS_NAME + ".setImageData() :: Data copy finished.");
+	}
+
+	public byte[] getImageData(){
+		byte[] returnImg;
+		Logger.log(Logger.LOG_TYPES.DEBUG, TAG, CLASS_NAME + ".getImageData() :: Entry point.");
+		synchronized(image){
+			while(!imgChanged){
+				Logger.log(Logger.LOG_TYPES.DEBUG, TAG, CLASS_NAME + ".getImageData() :: Waiting for new data.");
+				try{ image.wait(); }catch(InterruptedException ie){}
+			}
+			Logger.log(Logger.LOG_TYPES.DEBUG, TAG, CLASS_NAME + ".getImageData() :: Retrieving new data.");
+			returnImg = image.clone();
+			imgChanged = false;
+		}
+		Logger.log(Logger.LOG_TYPES.DEBUG, TAG, CLASS_NAME + ".getImageData() :: New data retreived.");
+		return returnImg;
+	}
+
+	public synchronized boolean hasChanged(){
+		return imgChanged;
+	}
+}