SimpleMotionDetectorpublic class SimpleMotionDetector extends Frame implements ActionListener
| Fields Summary |
|---|
| SequenceGrabber | grabber | | SGVideoChannel | videoChannel | | QDGraphics | gw | | QDRect | grabBounds | | boolean | grabbing | | Button | stopButton | | Pict | grabPict | | byte[] | importPictBytes | | Component | importerComponent | | Label | motionLabel | | GraphicsImporter | importer | | RawEncodedImage | lastImage | | ImageDescription | lastImageDescription | | byte[] | lastImageBytes | | QDGraphics | newImageGW | | public static float | trigger | | static NumberFormat | formatter |
| Constructors Summary |
|---|
public SimpleMotionDetector()
formatter = NumberFormat.getInstance();
formatter.setMaximumFractionDigits (10);
super ("Simple Motion Detector");
QTSessionCheck.check();
setLayout (new BorderLayout());
motionLabel = new Label ();
motionLabel.setForeground (Color.red);
add (motionLabel, BorderLayout.NORTH);
stopButton = new Button ("Stop");
stopButton.addActionListener (this);
add (stopButton, BorderLayout.SOUTH);
importer = new GraphicsImporter (StdQTConstants.kQTFileTypePicture);
importerComponent =
QTFactory.makeQTComponent(importer).asComponent();
add (importerComponent, BorderLayout.CENTER);
setUpVideoGrab();
|
| Methods Summary |
|---|
| public void | actionPerformed(java.awt.event.ActionEvent e)
if (e.getSource() == stopButton) {
System.out.println ("Stop grabbing");
try {
grabbing = false;
if (grabber != null) {
grabber.stop();
}
} catch (Exception ex) {
ex.printStackTrace();
} finally {
System.exit (0);
}
}
| | public static void | main(java.lang.String[] args)
try {
Frame f = new SimpleMotionDetector();
f.pack();
f.setVisible(true);
} catch (QTException qte) {
qte.printStackTrace();
}
| | protected void | scanForDifference()
// this seems like overkill, but the GW we give
// the grabber doesn't get updated. Picts returned
// from grabber are different each time, so use 'em
if (newImageGW == null)
newImageGW = new QDGraphics (grabBounds);
grabPict = grabber.grabPict (grabBounds, 0, 0);
grabPict.draw (newImageGW, grabBounds);
/* sanity check proved gw wasn't being drawn on
try {
newImageGW.setForeColor (quicktime.qd.QDColor.red);
newImageGW.textSize (96);
newImageGW.moveTo (100,100);
String str = Integer.toString (thumbcount);
newImageGW.drawText (str, 0, str.length());
Pict sanityPict = newImageGW.makeThumbnail (grabBounds, 0);
sanityPict.writeToFile (new java.io.File ("sanity" +
(thumbcount++) +
".pict"));
} catch (java.io.IOException ioe) {
ioe.printStackTrace();
}
*/
if (lastImage != null) {
// compare to last image
float similarity = QTImage.getSimilarity (newImageGW,
grabBounds,
lastImageDescription,
lastImage);
System.out.println ("similarity == " +
formatter.format(similarity));
if (similarity < trigger) {
System.out.println ("*** Motion detect ***");
motionLabel.setText ("motion detect");
} else {
motionLabel.setText ("");
}
}
// create a new lastImage from grabber GWorld
int bufSize =
QTImage.getMaxCompressionSize (newImageGW,
newImageGW.getBounds(),
0,
StdQTConstants.codecNormalQuality,
StdQTConstants.kRawCodecType,
CodecComponent.anyCodec);
// make new last image
lastImageBytes = new byte[bufSize];
lastImage = new RawEncodedImage (lastImageBytes);
lastImageDescription =
QTImage.compress(newImageGW,
newImageGW.getBounds(),
StdQTConstants.codecNormalQuality,
StdQTConstants.kRawCodecType,
lastImage);
System.out.println ("made new last image, size= " +
lastImage.getSize());
| | protected void | setUpVideoGrab()
grabber = new SequenceGrabber();
System.out.println ("got grabber");
// force an offscreen gworld
grabBounds = new QDRect (320, 240);
gw = new QDGraphics (grabBounds);
grabber.setGWorld (gw, null);
// get videoChannel and set its bounds
videoChannel = new SGVideoChannel (grabber);
System.out.println ("Got SGVideoChannel");
videoChannel.setBounds (grabBounds);
// get settings
// yikes! this crashes java 1.4.2 on mac os x!
// videoChannel.settingsDialog();
// prepare and start previewing
videoChannel.setUsage (StdQTConstants.seqGrabPreview);
grabber.prepare(true, false);
grabber.startPreview();
// get first grab, so we're ready
// to calc diff's and draw component
scanForDifference();
updateImportedPict();
grabbing = true;
// set up thread to idle
ActionListener timerCallback =
new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (grabbing) {
try {
System.out.println ("idle");
grabber.idle();
grabber.update(null);
scanForDifference();
updateImportedPict();
} catch (QTException qte) {
qte.printStackTrace();
}
}
}
};
Timer timer = new Timer (2000, timerCallback);
timer.start();
| | protected void | updateImportedPict()
importPictBytes = new byte [grabPict.getSize() + 512];
grabPict.copyToArray (0,
importPictBytes,
512,
importPictBytes.length - 512);
Pict wrapperPict = new Pict (importPictBytes);
DataRef ref = new DataRef (wrapperPict,
StdQTConstants.kDataRefQTFileTypeTag,
"PICT");
importer.setDataReference (ref);
importer.draw();
if (importerComponent != null)
importerComponent.repaint();
// wrapperPict.disposeQTObject();
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