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 org.fly.scan.decode;
  
  import android.content.Context;
  import android.os.Handler;
  import android.os.Looper;
  
  import com.google.zxing.BarcodeFormat;
  import com.google.zxing.DecodeHintType;
  import com.google.zxing.ResultPointCallback;
  
  import org.fly.scan.callback.CaptureCallback;
  
  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 final class DecodeThread extends Thread {
  
      public static final String BARCODE_BITMAP = "barcode_bitmap";
      public static final String BARCODE_SCALED_FACTOR = "barcode_scaled_factor";
  
      private final Context context;
      private final Map<DecodeHintType, Object> hints;
      private Handler handler;
      private final CountDownLatch handlerInitLatch;
      private final CaptureCallback callback;
  
      public DecodeThread(Context context,
                   Collection<BarcodeFormat> decodeFormats,
                   Map<DecodeHintType, ?> baseHints,
                   String characterSet,
                   ResultPointCallback resultPointCallback,
                   CaptureCallback callback) {
  
          this.context = context;
          this.callback = callback;
          handlerInitLatch = new CountDownLatch(1);
  
          hints = new EnumMap<>(DecodeHintType.class);
          if (baseHints != null) {
              hints.putAll(baseHints);
          }
  
          // The prefs can't change while the thread is running, so pick them up once here.
          if (decodeFormats == null || decodeFormats.isEmpty()) {
              decodeFormats = EnumSet.noneOf(BarcodeFormat.class);
              decodeFormats.addAll(DecodeFormatManager.PRODUCT_FORMATS);
              decodeFormats.addAll(DecodeFormatManager.INDUSTRIAL_FORMATS);
              decodeFormats.addAll(DecodeFormatManager.QR_CODE_FORMATS);
              decodeFormats.addAll(DecodeFormatManager.DATA_MATRIX_FORMATS);
              decodeFormats.addAll(DecodeFormatManager.AZTEC_FORMATS);
              decodeFormats.addAll(DecodeFormatManager.PDF417_FORMATS);
          }
          hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
  
          if (characterSet != null) {
              hints.put(DecodeHintType.CHARACTER_SET, characterSet);
          }
  
          hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
      }
  
      public Handler getHandler() {
          try {
              handlerInitLatch.await();
          } catch (InterruptedException ie) {
              // continue?
          }
          return handler;
      }
  
      @Override
      public void run() {
          Looper.prepare();
          handler = new DecodeHandler(hints, callback);
          handlerInitLatch.countDown();
          Looper.loop();
      }
  }