cc.wulian.smarthomev5.fragment.singin.handler.DecodeHandler.java Source code

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Here is the source code for cc.wulian.smarthomev5.fragment.singin.handler.DecodeHandler.java

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/*
 * 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 cc.wulian.smarthomev5.fragment.singin.handler;

import java.util.Hashtable;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.support.v4.app.Fragment;
import android.util.Log;

import cc.wulian.smarthomev5.fragment.singin.IQRScanHandlerResult;
import cc.wulian.smarthomev5.fragment.singin.QRScanFragmentV5;

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 com.google.zxing.library.R;
import com.google.zxing.client.android.camera.CameraManager;
import com.google.zxing.client.android.camera.PlanarYUVLuminanceSource;

final class DecodeHandler extends Handler {

    private static final String TAG = DecodeHandler.class.getSimpleName();

    private final IQRScanHandlerResult scanHandlerResult;
    private final MultiFormatReader multiFormatReader;

    DecodeHandler(IQRScanHandlerResult scanHandlerResult, Hashtable<DecodeHintType, Object> hints) {
        this.scanHandlerResult = scanHandlerResult;
        multiFormatReader = new MultiFormatReader();
        multiFormatReader.setHints(hints);
    }

    @Override
    public void handleMessage(Message message) {
        int msgID = message.what;
        if (msgID == R.id.decode) {
            decode((byte[]) message.obj, message.arg1, message.arg2);
        } else if (msgID == R.id.quit) {
            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;
        // /start rotate 90 2013.02.04///
        if (!CameraManager.get().isLandscape()) {
            byte[] rotatedData = new byte[data.length];
            for (int y = 0; y < height; y++) {
                for (int x = 0; x < width; x++) {
                    int index1 = (x * height + height - y - 1);
                    int index2 = (x + y * width);
                    if (index1 < rotatedData.length && index2 < data.length) {
                        rotatedData[index1] = data[index2];
                    }
                }
            }
            int tmp = width; // Here we are swapping, that's the difference to #11
            width = height;
            height = tmp;
            data = rotatedData;
        }
        // //end rotate////
        PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        if (bitmap != null) {
            Log.d(TAG, "decode: bitmap is exists");
        } else {
            Log.d(TAG, "decode: bitmap is null");
        }
        try {
            rawResult = multiFormatReader.decodeWithState(bitmap);
        } catch (ReaderException re) {
            Log.d(TAG, "decode: ", re);
        } finally {
            multiFormatReader.reset();
        }

        if (rawResult != null) {
            long end = System.currentTimeMillis();
            Log.d(TAG, "Found barcode (" + (end - start) + " ms):\n" + rawResult.toString());
            Message message = Message.obtain(scanHandlerResult.getHandler(), R.id.decode_succeeded, rawResult);
            Bundle bundle = new Bundle();
            bundle.putParcelable(DecodeThread.BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());

            message.setData(bundle);
            // Log.d(TAG, "Sending decode succeeded message...");
            message.sendToTarget();
        } else {
            Message message = Message.obtain(scanHandlerResult.getHandler(), R.id.decode_failed);
            message.sendToTarget();
        }
    }

}