public interface CameraSource {

 static final String LOG_TAG = "camera";
 
 /**
  * Open the camera source for subsequent use via calls to capture().
  *
  * @return true if the camera source was successfully opened.
  */
 
 boolean open();
 
 /**
  * Close the camera source. Calling close on a closed CameraSource is
  * permitted but has no effect. The camera source may be reopened after
  * being closed.
  */
 
 void close();
 
 /**
  * The width of the captured image.
  *
  * @return the width of the capture in pixels
  */
 
 int getWidth();
 
 /**
  * The height of the captured image.
  *
  * @return the height of the capture in pixels
  */
 
 int getHeight();
 
 /**
  * Attempts to render the current camera view onto the supplied canvas.
  * The capture will be rendered into the rectangle (0,0,width,height).
  * Outstanding transformations on the canvas may alter this.
  *
  * @param canvas the canvas to which the captured pixel data will be written
  * @return true iff a frame was successfully written to the canvas
  */
 
 boolean capture(Canvas canvas);
 
 boolean saveImage(String savePath, String fileName);
 
}