package com.google.zxing.client.android;
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.DecodeHintType;
+import com.google.zxing.ResultPointCallback;
+
import android.content.SharedPreferences;
-import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
-import android.os.Message;
import android.preference.PreferenceManager;
-import com.google.zxing.BarcodeFormat;
-import com.google.zxing.DecodeHintType;
-import com.google.zxing.MultiFormatReader;
-import com.google.zxing.ReaderException;
-import com.google.zxing.Result;
-import java.util.Date;
import java.util.Hashtable;
import java.util.Vector;
+import java.util.concurrent.CountDownLatch;
/**
* This thread does all the heavy lifting of decoding the images.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
*/
final class DecodeThread extends Thread {
public static final String BARCODE_BITMAP = "barcode_bitmap";
- public Handler mHandler;
- private BarcodesCaptureActivity mActivity;
- private MultiFormatReader mMultiFormatReader;
+ private final CaptureActivity activity;
+ private final Hashtable<DecodeHintType, Object> hints;
+ private Handler handler;
+ private final CountDownLatch handlerInitLatch;
+
+ DecodeThread(CaptureActivity activity,
+ Vector<BarcodeFormat> decodeFormats,
+ String characterSet,
+ ResultPointCallback resultPointCallback) {
+
+ this.activity = activity;
+ handlerInitLatch = new CountDownLatch(1);
- DecodeThread(BarcodesCaptureActivity activity, String mode) {
- mActivity = activity;
- mMultiFormatReader = new MultiFormatReader();
+ hints = new Hashtable<DecodeHintType, Object>(3);
// The prefs can't change while the thread is running, so pick them up once here.
- if (mode == null || mode.length() == 0) {
+ if (decodeFormats == null || decodeFormats.isEmpty()) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
- boolean decode1D = prefs.getBoolean(BarcodesPreferenceActivity.KEY_DECODE_1D, true);
- boolean decodeQR = prefs.getBoolean(BarcodesPreferenceActivity.KEY_DECODE_QR, true);
+ boolean decode1D = prefs.getBoolean(PreferencesActivity.KEY_DECODE_1D, true);
+ boolean decodeQR = prefs.getBoolean(PreferencesActivity.KEY_DECODE_QR, true);
if (decode1D && decodeQR) {
- setDecodeAllMode();
+ hints.put(DecodeHintType.POSSIBLE_FORMATS, CaptureActivity.ALL_FORMATS);
} else if (decode1D) {
- setDecode1DMode();
+ hints.put(DecodeHintType.POSSIBLE_FORMATS, CaptureActivity.ONE_D_FORMATS);
} else if (decodeQR) {
- setDecodeQRMode();
+ hints.put(DecodeHintType.POSSIBLE_FORMATS, CaptureActivity.QR_CODE_FORMATS);
}
} else {
- if (mode.equals(Intents.Scan.PRODUCT_MODE)) {
- setDecodeProductMode();
- } else if (mode.equals(Intents.Scan.ONE_D_MODE)) {
- setDecode1DMode();
- } else if (mode.equals(Intents.Scan.QR_CODE_MODE)) {
- setDecodeQRMode();
- } else {
- setDecodeAllMode();
- }
+ hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
}
- }
- @Override
- public void run() {
- Looper.prepare();
- mHandler = new Handler() {
- public void handleMessage(Message message) {
- switch (message.what) {
- case R.id.decode:
- decode((byte[]) message.obj, message.arg1, message.arg2);
- break;
- case R.id.quit:
- Looper.myLooper().quit();
- break;
- }
- }
- };
- Looper.loop();
- }
-
- private void setDecodeProductMode() {
- Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
- Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>();
- vector.addElement(BarcodeFormat.UPC_A);
- vector.addElement(BarcodeFormat.UPC_E);
- vector.addElement(BarcodeFormat.EAN_13);
- vector.addElement(BarcodeFormat.EAN_8);
- hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
- mMultiFormatReader.setHints(hints);
- }
-
- // TODO: This is fragile in case we add new formats. It would be better to have a new enum
- // value which represented all 1D formats.
- private void setDecode1DMode() {
- Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
- Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>();
- vector.addElement(BarcodeFormat.UPC_A);
- vector.addElement(BarcodeFormat.UPC_E);
- vector.addElement(BarcodeFormat.EAN_13);
- vector.addElement(BarcodeFormat.EAN_8);
- vector.addElement(BarcodeFormat.CODE_39);
- vector.addElement(BarcodeFormat.CODE_128);
- hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
- mMultiFormatReader.setHints(hints);
- }
-
- private void setDecodeQRMode() {
- Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
- Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>();
- vector.addElement(BarcodeFormat.QR_CODE);
- hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
- mMultiFormatReader.setHints(hints);
- }
+ if (characterSet != null) {
+ hints.put(DecodeHintType.CHARACTER_SET, characterSet);
+ }
- private void setDecodeAllMode() {
- mMultiFormatReader.setHints(null);
+ hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
}
- /**
- * Decode the data within the viewfinder rectangle, and time how long it took. For efficiency,
- * reuse the same reader objects from one decode to the next.
- *
- * @param data The YUV preview frame.
- * @param width The width of the preview frame.
- * @param height The height of the preview frame.
- */
- private void decode(byte[] data, int width, int height) {
- Date startDate = new Date();
- boolean success;
- Result rawResult = null;
- YUVMonochromeBitmapSource source = new YUVMonochromeBitmapSource(data, width, height,
- CameraManager.get().getFramingRect());
+ Handler getHandler() {
try {
- rawResult = mMultiFormatReader.decodeWithState(source);
- success = true;
- } catch (ReaderException e) {
- success = false;
- }
- Date endDate = new Date();
-
- if (success) {
- Message message = Message.obtain(mActivity.mHandler, R.id.decode_succeeded, rawResult);
- message.arg1 = (int) (endDate.getTime() - startDate.getTime());
- Bundle bundle = new Bundle();
- bundle.putParcelable(BARCODE_BITMAP, source.renderToBitmap());
- message.setData(bundle);
- message.sendToTarget();
- } else {
- Message message = Message.obtain(mActivity.mHandler, R.id.decode_failed);
- message.arg1 = (int) (endDate.getTime() - startDate.getTime());
- message.sendToTarget();
+ handlerInitLatch.await();
+ } catch (InterruptedException ie) {
+ // continue?
}
+ return handler;
+ }
+
+ @Override
+ public void run() {
+ Looper.prepare();
+ handler = new DecodeHandler(activity, hints);
+ handlerInitLatch.countDown();
+ Looper.loop();
}
}