| /* |
| * 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.client.android; |
| |
| import com.google.zxing.BinaryBitmap; |
| import com.google.zxing.DecodeHintType; |
| import com.google.zxing.MultiFormatReader; |
| import com.google.zxing.ReaderException; |
| import com.google.zxing.Result; |
| import com.google.zxing.common.HybridBinarizer; |
| |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.util.Log; |
| |
| import java.util.Hashtable; |
| |
| final class DecodeHandler extends Handler { |
| |
| private static final String TAG = DecodeHandler.class.getSimpleName(); |
| |
| private final CaptureActivity activity; |
| private final MultiFormatReader multiFormatReader; |
| private boolean running = true; |
| |
| DecodeHandler(CaptureActivity activity, Hashtable<DecodeHintType,Object> hints) { |
| multiFormatReader = new MultiFormatReader(); |
| multiFormatReader.setHints(hints); |
| this.activity = activity; |
| } |
| |
| @Override |
| public void handleMessage(Message message) { |
| if (!running) { |
| return; |
| } |
| if (message.what == R.id.decode) { |
| decode((byte[]) message.obj, message.arg1, message.arg2); |
| } else if (message.what == R.id.quit) { |
| running = false; |
| Looper.myLooper().quit(); |
| } |
| } |
| |
| /** |
| * Decode the data within the viewfinder rectangle, and time how long it took. For efficiency, |
| * reuse the same reader objects from one decode to the next. |
| * |
| * @param data The YUV preview frame. |
| * @param width The width of the preview frame. |
| * @param height The height of the preview frame. |
| */ |
| private void decode(byte[] data, int width, int height) { |
| long start = System.currentTimeMillis(); |
| Result rawResult = null; |
| PlanarYUVLuminanceSource source = activity.getCameraManager().buildLuminanceSource(data, width, height); |
| if (source != null) { |
| BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); |
| try { |
| rawResult = multiFormatReader.decodeWithState(bitmap); |
| } catch (ReaderException re) { |
| // continue |
| } finally { |
| multiFormatReader.reset(); |
| } |
| } |
| |
| Handler handler = activity.getHandler(); |
| if (rawResult != null) { |
| // Don't log the barcode contents for security. |
| long end = System.currentTimeMillis(); |
| Log.d(TAG, "Found barcode in " + (end - start) + " ms"); |
| if (handler != null) { |
| Message message = Message.obtain(handler, R.id.decode_succeeded, rawResult); |
| Bundle bundle = new Bundle(); |
| bundle.putParcelable(DecodeThread.BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap()); |
| message.setData(bundle); |
| message.sendToTarget(); |
| } |
| } else { |
| if (handler != null) { |
| Message message = Message.obtain(handler, R.id.decode_failed); |
| message.sendToTarget(); |
| } |
| } |
| } |
| |
| } |