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/*
* 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.google.zxing.client.android;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.ResultPointCallback;
import android.content.SharedPreferences;
import android.os.Handler;
import android.os.Looper;
import android.preference.PreferenceManager;
import android.util.Log;
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)
*/
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 CaptureActivity activity;
private final Map<DecodeHintType,Object> hints;
private Handler handler;
private final CountDownLatch handlerInitLatch;
DecodeThread(CaptureActivity activity,
Collection<BarcodeFormat> decodeFormats,
Map<DecodeHintType,?> baseHints,
String characterSet,
ResultPointCallback resultPointCallback) {
this.activity = activity;
handlerInitLatch = new CountDownLatch(1);
hints = new EnumMap<DecodeHintType,Object>(DecodeHintType.class);
if (baseHints != null) {
hints.putAll(baseHints);
}
// The prefs can't change while the thread is running, so pick them up once here.
hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
if (characterSet != null) {
hints.put(DecodeHintType.CHARACTER_SET, characterSet);
}
hints.put(DecodeHintType.NEED_RESULT_POINT_CALLBACK, resultPointCallback);
Log.i("DecodeThread", "Hints: " + hints);
}
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();
}
}
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