1/*
2 * Copyright (C) 2010 ZXing authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.google.zxing.client.android.camera;
18
19import android.graphics.Point;
20import android.hardware.Camera;
21import android.os.Handler;
22import android.os.Message;
23import android.util.Log;
24
25final class PreviewCallback implements Camera.PreviewCallback {
26
27  private static final String TAG = PreviewCallback.class.getSimpleName();
28
29  private final CameraConfigurationManager configManager;
30  private Handler previewHandler;
31  private int previewMessage;
32
33  PreviewCallback(CameraConfigurationManager configManager) {
34    this.configManager = configManager;
35  }
36
37  void setHandler(Handler previewHandler, int previewMessage) {
38    this.previewHandler = previewHandler;
39    this.previewMessage = previewMessage;
40  }
41
42  public void onPreviewFrame(byte[] data, Camera camera) {
43    Point cameraResolution = configManager.getCameraResolution();
44    Handler thePreviewHandler = previewHandler;
45    if (thePreviewHandler != null) {
46      Message message = thePreviewHandler.obtainMessage(previewMessage, cameraResolution.x,
47          cameraResolution.y, data);
48      message.sendToTarget();
49      previewHandler = null;
50    } else {
51      Log.d(TAG, "Got preview callback, but no handler for it");
52    }
53  }
54
55}
56