/*
- * Copyright 2007 Google Inc.
+ * Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
import javax.microedition.media.control.VideoControl;
/**
- * @author Sean Owen (srowen@google.com)
+ * Thread which does the work of capturing a frame and decoding it.
+ *
+ * @author Sean Owen
*/
-final class SnapshotThread extends Thread {
-
- private static SnapshotThread currentThread;
+final class SnapshotThread implements Runnable {
private final ZXingMIDlet zXingMIDlet;
+ private final Object waitLock;
+ private volatile boolean done;
+ private final MultimediaManager multimediaManager;
SnapshotThread(ZXingMIDlet zXingMIDlet) {
this.zXingMIDlet = zXingMIDlet;
+ waitLock = new Object();
+ done = false;
+ multimediaManager = ZXingMIDlet.buildMultimediaManager();
}
- static synchronized void startThread(ZXingMIDlet zXingMIDlet) {
- if (currentThread == null) {
- currentThread = new SnapshotThread(zXingMIDlet);
- currentThread.start();
+ void continueRun() {
+ synchronized (waitLock) {
+ waitLock.notifyAll();
}
}
- public void run() {
- Player player = zXingMIDlet.getPlayer();
- try {
- AdvancedMultimediaManager.setFocus(player);
+ private void waitForSignal() {
+ synchronized (waitLock) {
try {
- player.stop();
- } catch (MediaException me) {
+ waitLock.wait();
+ } catch (InterruptedException ie) {
// continue
}
- byte[] snapshot = takeSnapshot();
- Image capturedImage = Image.createImage(snapshot, 0, snapshot.length);
- MonochromeBitmapSource source = new LCDUIImageMonochromeBitmapSource(capturedImage);
- Reader reader = new MultiFormatReader();
- Result result = reader.decode(source);
- zXingMIDlet.handleDecodedText(result.getText());
- } catch (ReaderException re) {
- // Show a friendlier message on a mere failure to read the barcode
- zXingMIDlet.showError("Sorry, no barcode was found.");
- } catch (Throwable t) {
- zXingMIDlet.showError(t);
- } finally {
+ }
+ }
+
+ void stop() {
+ done = true;
+ continueRun();
+ }
+
+ public void run() {
+ Player player = zXingMIDlet.getPlayer();
+ do {
+ waitForSignal();
try {
- player.start();
+ multimediaManager.setFocus(player);
+ byte[] snapshot = takeSnapshot();
+ Image capturedImage = Image.createImage(snapshot, 0, snapshot.length);
+ MonochromeBitmapSource source = new LCDUIImageMonochromeBitmapSource(capturedImage);
+ Reader reader = new MultiFormatReader();
+ Result result = reader.decode(source);
+ zXingMIDlet.handleDecodedText(result);
+ } catch (ReaderException re) {
+ // Show a friendlier message on a mere failure to read the barcode
+ zXingMIDlet.showError("Sorry, no barcode was found.");
} catch (MediaException me) {
- // continue
+ zXingMIDlet.showError(me);
+ } catch (RuntimeException re) {
+ zXingMIDlet.showError(re);
}
- currentThread = null;
- }
-
+ } while (!done);
}
private byte[] takeSnapshot() throws MediaException {