content: /*
   * Copyright (C) 2008 ZXing authors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.xys.libzxing.zxing.decode;
  
  import android.os.Handler;
  import android.os.Looper;
  
  import com.google.zxing.BarcodeFormat;
  import com.google.zxing.DecodeHintType;
  import com.xys.libzxing.zxing.activity.CaptureActivity;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.EnumMap;
  import java.util.EnumSet;
  import java.util.Map;
  import java.util.concurrent.CountDownLatch;
  
  /**
   * This thread does all the heavy lifting of decoding the images.
   *
   * @author dswitkin@google.com (Daniel Switkin)
   */
  public class DecodeThread extends Thread {
  
      public static final String BARCODE_BITMAP = "barcode_bitmap";
  
      public static final int BARCODE_MODE = 0X100;
      public static final int QRCODE_MODE = 0X200;
      public static final int ALL_MODE = 0X300;
  
      private final CaptureActivity activity;
      private final Map<DecodeHintType, Object> hints;
      private final CountDownLatch handlerInitLatch;
      private Handler handler;
  
      public DecodeThread(CaptureActivity activity, int decodeMode) {
  
          this.activity = activity;
          handlerInitLatch = new CountDownLatch(1);
  
          hints = new EnumMap<DecodeHintType, Object>(DecodeHintType.class);
  
          Collection<BarcodeFormat> decodeFormats = new ArrayList<BarcodeFormat>();
          decodeFormats.addAll(EnumSet.of(BarcodeFormat.AZTEC));
          decodeFormats.addAll(EnumSet.of(BarcodeFormat.PDF_417));
  
          switch (decodeMode) {
              case BARCODE_MODE:
                  decodeFormats.addAll(DecodeFormatManager.getBarCodeFormats());
                  break;
  
              case QRCODE_MODE:
                  decodeFormats.addAll(DecodeFormatManager.getQrCodeFormats());
                  break;
  
              case ALL_MODE:
                  decodeFormats.addAll(DecodeFormatManager.getBarCodeFormats());
                  decodeFormats.addAll(DecodeFormatManager.getQrCodeFormats());
                  break;
  
              default:
                  break;
          }
  
          hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
      }
  
      public Handler getHandler() {
          try {
              handlerInitLatch.await();
          } catch (InterruptedException ie) {
              // continue?
          }
          return handler;
      }
  
      @Override
      public void run() {
          Looper.prepare();
          handler = new DecodeHandler(activity, hints);
          handlerInitLatch.countDown();
          Looper.loop();
      }
  
  }
  