Draft of 'thinking' visualization for barcode scanning. Works for 1D and QR codes.

[zxing.git] / android / src / com / google / zxing / client / android / DecodeThread.java

diff --git a/android/src/com/google/zxing/client/android/DecodeThread.java b/android/src/com/google/zxing/client/android/DecodeThread.java
index bd2ade6..ca2afea 100755 (executable)
--- a/android/src/com/google/zxing/client/android/DecodeThread.java
+++ b/android/src/com/google/zxing/client/android/DecodeThread.java
@@ -22,6 +22,7 @@ import com.google.zxing.DecodeHintType;
 import com.google.zxing.MultiFormatReader;
 import com.google.zxing.ReaderException;
 import com.google.zxing.Result;
+import com.google.zxing.ResultPointCallback;
 import com.google.zxing.common.GlobalHistogramBinarizer;
 
 import android.content.SharedPreferences;
@@ -44,13 +45,15 @@ final class DecodeThread extends Thread {
   public static final String BARCODE_BITMAP = "barcode_bitmap";
   private static final String TAG = "DecodeThread";
 
-  public Handler handler;
+  private Handler handler;
   private final CaptureActivity activity;
   private final MultiFormatReader multiFormatReader;
+  private final ResultPointCallback resultPointCallback;
 
-  DecodeThread(CaptureActivity activity, String mode) {
+  DecodeThread(CaptureActivity activity, String mode, ResultPointCallback resultPointCallback) {
     this.activity = activity;
     multiFormatReader = new MultiFormatReader();
+    this.resultPointCallback = resultPointCallback;
 
     // The prefs can't change while the thread is running, so pick them up once here.
     if (mode == null || mode.length() == 0) {
@@ -77,6 +80,10 @@ final class DecodeThread extends Thread {
     }
   }
 
+  Handler getHandler() {
+    return handler;
+  }
+
   @Override
   public void run() {
     Looper.prepare();
@@ -97,39 +104,27 @@ final class DecodeThread extends Thread {
   }
 
   private void setDecodeProductMode() {
-    Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
-    Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>(4);
-    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);
-    multiFormatReader.setHints(hints);
+    doSetDecodeMode(BarcodeFormat.UPC_A,
+                    BarcodeFormat.UPC_E,
+                    BarcodeFormat.EAN_13,
+                    BarcodeFormat.EAN_8);
   }
 
   /**
    * Select the 1D formats we want this client to decode by hand.
    */
   private void setDecode1DMode() {
-    Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
-    Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>(7);
-    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);
-    vector.addElement(BarcodeFormat.ITF);
-    hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
-    multiFormatReader.setHints(hints);
+    doSetDecodeMode(BarcodeFormat.UPC_A,
+                    BarcodeFormat.UPC_E,
+                    BarcodeFormat.EAN_13,
+                    BarcodeFormat.EAN_8,
+                    BarcodeFormat.CODE_39,
+                    BarcodeFormat.CODE_128,
+                    BarcodeFormat.ITF);
   }
 
   private void setDecodeQRMode() {
-    Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
-    Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>(1);
-    vector.addElement(BarcodeFormat.QR_CODE);
-    hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
-    multiFormatReader.setHints(hints);
+    doSetDecodeMode(BarcodeFormat.QR_CODE);
   }
 
   /**
@@ -137,17 +132,24 @@ final class DecodeThread extends Thread {
    * explicitly set which formats are available.
    */
   private void setDecodeAllMode() {
+    doSetDecodeMode(BarcodeFormat.UPC_A,
+                    BarcodeFormat.UPC_E,
+                    BarcodeFormat.EAN_13,
+                    BarcodeFormat.EAN_8,
+                    BarcodeFormat.CODE_39,
+                    BarcodeFormat.CODE_128,
+                    BarcodeFormat.ITF,
+                    BarcodeFormat.QR_CODE);
+  }
+
+  private void doSetDecodeMode(BarcodeFormat... formats) {
     Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>(3);
-    Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>(8);
-    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);
-    vector.addElement(BarcodeFormat.ITF);
-    vector.addElement(BarcodeFormat.QR_CODE);
+    Vector<BarcodeFormat> vector = new Vector<BarcodeFormat>(formats.length);
+    for (BarcodeFormat format : formats) {
+      vector.addElement(format);
+    }
     hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
+    hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
     multiFormatReader.setHints(hints);
   }
 
@@ -161,27 +163,25 @@ final class DecodeThread extends Thread {
    */
   private void decode(byte[] data, int width, int height) {
     long start = System.currentTimeMillis();
-    boolean success;
     Result rawResult = null;
-    BaseLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
+    PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
     BinaryBitmap bitmap = new BinaryBitmap(new GlobalHistogramBinarizer(source));
     try {
       rawResult = multiFormatReader.decodeWithState(bitmap);
-      success = true;
-    } catch (ReaderException e) {
-      success = false;
+    } catch (ReaderException re) {
+      // continue
     }
-    long end = System.currentTimeMillis();
 
-    if (success) {
+    if (rawResult != null) {
+      long end = System.currentTimeMillis();
       Log.v(TAG, "Found barcode (" + (end - start) + " ms):\n" + rawResult.toString());
-      Message message = Message.obtain(activity.handler, R.id.decode_succeeded, rawResult);
+      Message message = Message.obtain(activity.getHandler(), R.id.decode_succeeded, rawResult);
       Bundle bundle = new Bundle();
       bundle.putParcelable(BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
       message.setData(bundle);
       message.sendToTarget();
     } else {
-      Message message = Message.obtain(activity.handler, R.id.decode_failed);
+      Message message = Message.obtain(activity.getHandler(), R.id.decode_failed);
       message.sendToTarget();
     }
   }