content: /*
   * Copyright (C) 2010 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.google.zxing.camera;
  
  import android.graphics.Point;
  import android.hardware.Camera;
  import android.os.Handler;
  import android.os.Message;
  import android.util.Log;
  
  final class PreviewCallback implements Camera.PreviewCallback {
  
      private static final String TAG = PreviewCallback.class.getSimpleName();
  
      private final CameraConfigurationManager configManager;
      private final boolean useOneShotPreviewCallback;
      private Handler previewHandler;
      private int previewMessage;
  
      PreviewCallback(CameraConfigurationManager configManager, boolean useOneShotPreviewCallback) {
          this.configManager = configManager;
          this.useOneShotPreviewCallback = useOneShotPreviewCallback;
      }
  
      void setHandler(Handler previewHandler, int previewMessage) {
          this.previewHandler = previewHandler;
          this.previewMessage = previewMessage;
      }
  
      public void onPreviewFrame(byte[] data, Camera camera) {
          Point cameraResolution = configManager.getCameraResolution();
          if (!useOneShotPreviewCallback) {
              camera.setPreviewCallback(null);
          }
          if (previewHandler != null) {
              Message message = previewHandler.obtainMessage(previewMessage, cameraResolution.x,
                      cameraResolution.y, data);
              message.sendToTarget();
              previewHandler = null;
          } else {
              Log.d(TAG, "Got preview callback, but no handler for it");
          }
      }
  
  }
  