Android Open Source - esr-scanner Decode Thread

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2008 ZXing authors/*from   ww  w  . j  ava  2 s .  com*/
 * Copyright 2011 Robert Theis
 *
 * 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 ch.luklanis.esscan;

import android.os.Handler;
import android.os.Looper;

import com.googlecode.tesseract.android.TessBaseAPI;

import java.util.concurrent.CountDownLatch;

/**
 * This thread does all the heavy lifting of decoding the images.
 * <p/>
 * The code for this class was adapted from the ZXing project: http://code.google.com/p/zxing
 */
final class DecodeThread extends Thread {

    private final IBase base;
    private Handler handler;
    private final CountDownLatch handlerInitLatch;
    private final TessBaseAPI baseApi;

    DecodeThread(IBase base, TessBaseAPI baseApi) {
        this.base = base;
        this.baseApi = baseApi;
        handlerInitLatch = new CountDownLatch(1);
    }

    Handler getHandler() {
        try {
            handlerInitLatch.await();
        } catch (InterruptedException ie) {
            // continue?
        }
        return handler;
    }

    @Override
    public void run() {
        Looper.prepare();
        handler = new DecodeHandler(base, baseApi);
        handlerInitLatch.countDown();
        Looper.loop();
    }
}

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