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Issue 727 contributed initial Maxicode support
git-svn-id: https://zxing.googlecode.com/svn/trunk@1949 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen
parent
468ec159b8
commit
d0c59c4c16
2
AUTHORS
2
AUTHORS
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@ -45,11 +45,13 @@ Kevin Xue (NetDragon Websoft Inc., China)
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Lachezar Dobrev
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Luiz Silva
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Luka Finžgar
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Manuel Kasten
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Marcelo
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Mateusz Jędrasik
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Matrix44
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Matthew Schulkind (Google)
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Matt York (LifeMarks)
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mike32767
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Mohamad Fairol
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Morgan Courbet
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Nikolaos Ftylitakis
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@ -56,6 +56,9 @@ public final class BarcodeFormat {
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/** ITF (Interleaved Two of Five) 1D format. */
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public static final BarcodeFormat ITF = new BarcodeFormat("ITF");
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/** MaxiCode 2D barcode format. */
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public static final BarcodeFormat MAXICODE = new BarcodeFormat("MAXICODE");
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/** PDF417 format. */
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public static final BarcodeFormat PDF_417 = new BarcodeFormat("PDF_417");
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@ -21,6 +21,7 @@ import com.google.zxing.datamatrix.DataMatrixReader;
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import com.google.zxing.oned.MultiFormatOneDReader;
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import com.google.zxing.pdf417.PDF417Reader;
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import com.google.zxing.qrcode.QRCodeReader;
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import com.google.zxing.maxicode.MaxiCodeReader;
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import java.util.Hashtable;
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import java.util.Vector;
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@ -122,7 +123,10 @@ public final class MultiFormatReader implements Reader {
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}
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if (formats.contains(BarcodeFormat.PDF_417)) {
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readers.addElement(new PDF417Reader());
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}
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}
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if (formats.contains(BarcodeFormat.MAXICODE)) {
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readers.addElement(new MaxiCodeReader());
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}
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// At end in "try harder" mode
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if (addOneDReader && tryHarder) {
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readers.addElement(new MultiFormatOneDReader(hints));
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@ -137,6 +141,7 @@ public final class MultiFormatReader implements Reader {
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readers.addElement(new DataMatrixReader());
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readers.addElement(new AztecReader());
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readers.addElement(new PDF417Reader());
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readers.addElement(new MaxiCodeReader());
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if (tryHarder) {
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readers.addElement(new MultiFormatOneDReader(hints));
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@ -144,6 +144,59 @@ public final class BitMatrix {
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return row;
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}
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/**
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* This is useful in detecting the enclosing rectangle of a 'pure' barcode.
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*
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* @return {left,top,width,height} enclosing rectangle of all 1 bits, or null if it is all white
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*/
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public int[] getEnclosingRectangle() {
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int left = width;
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int top = height;
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int right = -1;
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int bottom = -1;
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for (int y = 0; y < height; y++) {
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for (int x32 = 0; x32 < rowSize; x32++) {
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int theBits = bits[y * rowSize + x32];
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if (theBits != 0) {
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if (y < top) {
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top = y;
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}
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if (y > bottom) {
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bottom = y;
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}
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if (x32 * 32 < left) {
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int bit = 0;
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while ((theBits << (31 - bit)) == 0) {
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bit++;
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}
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if ((x32 * 32 + bit) < left) {
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left = x32 * 32 + bit;
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}
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}
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if (x32 * 32 + 31 > right) {
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int bit = 31;
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while ((theBits >>> bit) == 0) {
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bit--;
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}
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if ((x32 * 32 + bit) > right) {
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right = x32 * 32 + bit;
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}
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}
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}
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}
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}
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int width = right - left;
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int height = bottom - top;
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if (width < 0 || height < 0) {
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return null;
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}
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return new int[] {left, top, width, height};
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}
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/**
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* This is useful in detecting a corner of a 'pure' barcode.
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*
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@ -36,6 +36,7 @@ public final class GenericGF {
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public static final GenericGF QR_CODE_FIELD_256 = new GenericGF(0x011D, 256); // x^8 + x^4 + x^3 + x^2 + 1
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public static final GenericGF DATA_MATRIX_FIELD_256 = new GenericGF(0x012D, 256); // x^8 + x^5 + x^3 + x^2 + 1
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public static final GenericGF AZTEC_DATA_8 = DATA_MATRIX_FIELD_256;
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public static final GenericGF MAXICODE_FIELD_64 = AZTEC_DATA_6;
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private static final int INITIALIZATION_THRESHOLD = 0;
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@ -59,7 +60,7 @@ public final class GenericGF {
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this.size = size;
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if (size <= INITIALIZATION_THRESHOLD){
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initialize();
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initialize();
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}
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}
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121
core/src/com/google/zxing/maxicode/MaxiCodeReader.java
Normal file
121
core/src/com/google/zxing/maxicode/MaxiCodeReader.java
Normal file
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@ -0,0 +1,121 @@
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/*
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* Copyright 2011 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing.maxicode;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.BinaryBitmap;
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import com.google.zxing.ChecksumException;
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import com.google.zxing.DecodeHintType;
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import com.google.zxing.FormatException;
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import com.google.zxing.NotFoundException;
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import com.google.zxing.Reader;
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import com.google.zxing.Result;
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import com.google.zxing.ResultMetadataType;
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import com.google.zxing.ResultPoint;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.common.DecoderResult;
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import com.google.zxing.maxicode.decoder.Decoder;
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import java.util.Hashtable;
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/**
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* This implementation can detect and decode a MaxiCode in an image.
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*/
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public final class MaxiCodeReader implements Reader {
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private static final ResultPoint[] NO_POINTS = new ResultPoint[0];
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private static final int MATRIX_WIDTH = 30;
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private static final int MATRIX_HEIGHT = 33;
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private final Decoder decoder = new Decoder();
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Decoder getDecoder() {
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return decoder;
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}
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/**
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* Locates and decodes a MaxiCode in an image.
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*
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* @return a String representing the content encoded by the MaxiCode
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* @throws NotFoundException if a MaxiCode cannot be found
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* @throws FormatException if a MaxiCode cannot be decoded
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* @throws ChecksumException if error correction fails
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*/
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public Result decode(BinaryBitmap image) throws NotFoundException, ChecksumException, FormatException {
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return decode(image, null);
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}
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public Result decode(BinaryBitmap image, Hashtable hints)
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throws NotFoundException, ChecksumException, FormatException {
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DecoderResult decoderResult;
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if (hints != null && hints.containsKey(DecodeHintType.PURE_BARCODE)) {
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BitMatrix bits = extractPureBits(image.getBlackMatrix());
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decoderResult = decoder.decode(bits, hints);
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} else {
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throw NotFoundException.getNotFoundInstance();
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}
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ResultPoint[] points = NO_POINTS;
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Result result = new Result(decoderResult.getText(), decoderResult.getRawBytes(), points, BarcodeFormat.MAXICODE);
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if (decoderResult.getECLevel() != null) {
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result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, decoderResult.getECLevel());
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}
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return result;
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}
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public void reset() {
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// do nothing
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}
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/**
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* This method detects a code in a "pure" image -- that is, pure monochrome image
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* which contains only an unrotated, unskewed, image of a code, with some white border
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* around it. This is a specialized method that works exceptionally fast in this special
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* case.
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*
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* @see com.google.zxing.pdf417.PDF417Reader#extractPureBits(BitMatrix)
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* @see com.google.zxing.datamatrix.DataMatrixReader#extractPureBits(BitMatrix)
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* @see com.google.zxing.qrcode.QRCodeReader#extractPureBits(BitMatrix)
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*/
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private static BitMatrix extractPureBits(BitMatrix image) throws NotFoundException {
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int[] enclosingRectangle = image.getEnclosingRectangle();
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if (enclosingRectangle == null) {
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throw NotFoundException.getNotFoundInstance();
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}
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int left = enclosingRectangle[0];
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int top = enclosingRectangle[1];
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int width = enclosingRectangle[2];
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int height = enclosingRectangle[3];
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// Now just read off the bits
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BitMatrix bits = new BitMatrix(MATRIX_WIDTH, MATRIX_HEIGHT);
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for (int y = 0; y < MATRIX_HEIGHT; y++) {
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int iy = top + (y * height + height / 2) / MATRIX_HEIGHT;
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for (int x = 0; x < MATRIX_WIDTH; x++) {
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int ix = left + (x * width + width / 2 + (y & 0x01) * width / 2) / MATRIX_WIDTH;
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if (image.get(ix, iy)) {
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bits.set(x, y);
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}
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}
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}
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return bits;
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}
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}
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@ -0,0 +1,90 @@
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/*
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* Copyright 2011 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.zxing.maxicode.decoder;
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import com.google.zxing.FormatException;
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import com.google.zxing.common.BitMatrix;
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/**
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* @author mike32767
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* @author Manuel Kasten
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*/
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final class BitMatrixParser {
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private static final int[][] BITNR = {
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{121,120,127,126,133,132,139,138,145,144,151,150,157,156,163,162,169,168,175,174,181,180,187,186,193,192,199,198, -2, -2},
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{123,122,129,128,135,134,141,140,147,146,153,152,159,158,165,164,171,170,177,176,183,182,189,188,195,194,201,200,816, -3},
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{125,124,131,130,137,136,143,142,149,148,155,154,161,160,167,166,173,172,179,178,185,184,191,190,197,196,203,202,818,817},
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{283,282,277,276,271,270,265,264,259,258,253,252,247,246,241,240,235,234,229,228,223,222,217,216,211,210,205,204,819, -3},
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{285,284,279,278,273,272,267,266,261,260,255,254,249,248,243,242,237,236,231,230,225,224,219,218,213,212,207,206,821,820},
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{287,286,281,280,275,274,269,268,263,262,257,256,251,250,245,244,239,238,233,232,227,226,221,220,215,214,209,208,822, -3},
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{289,288,295,294,301,300,307,306,313,312,319,318,325,324,331,330,337,336,343,342,349,348,355,354,361,360,367,366,824,823},
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{291,290,297,296,303,302,309,308,315,314,321,320,327,326,333,332,339,338,345,344,351,350,357,356,363,362,369,368,825, -3},
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{293,292,299,298,305,304,311,310,317,316,323,322,329,328,335,334,341,340,347,346,353,352,359,358,365,364,371,370,827,826},
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{409,408,403,402,397,396,391,390, 79, 78, -2, -2, 13, 12, 37, 36, 2, -1, 44, 43,109,108,385,384,379,378,373,372,828, -3},
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{411,410,405,404,399,398,393,392, 81, 80, 40, -2, 15, 14, 39, 38, 3, -1, -1, 45,111,110,387,386,381,380,375,374,830,829},
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{413,412,407,406,401,400,395,394, 83, 82, 41, -3, -3, -3, -3, -3, 5, 4, 47, 46,113,112,389,388,383,382,377,376,831, -3},
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{415,414,421,420,427,426,103,102, 55, 54, 16, -3, -3, -3, -3, -3, -3, -3, 20, 19, 85, 84,433,432,439,438,445,444,833,832},
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{417,416,423,422,429,428,105,104, 57, 56, -3, -3, -3, -3, -3, -3, -3, -3, 22, 21, 87, 86,435,434,441,440,447,446,834, -3},
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{419,418,425,424,431,430,107,106, 59, 58, -3, -3, -3, -3, -3, -3, -3, -3, -3, 23, 89, 88,437,436,443,442,449,448,836,835},
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{481,480,475,474,469,468, 48, -2, 30, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, 0, 53, 52,463,462,457,456,451,450,837, -3},
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{483,482,477,476,471,470, 49, -1, -2, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -2, -1,465,464,459,458,453,452,839,838},
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{485,484,479,478,473,472, 51, 50, 31, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, 1, -2, 42,467,466,461,460,455,454,840, -3},
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{487,486,493,492,499,498, 97, 96, 61, 60, -3, -3, -3, -3, -3, -3, -3, -3, -3, 26, 91, 90,505,504,511,510,517,516,842,841},
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{489,488,495,494,501,500, 99, 98, 63, 62, -3, -3, -3, -3, -3, -3, -3, -3, 28, 27, 93, 92,507,506,513,512,519,518,843, -3},
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{491,490,497,496,503,502,101,100, 65, 64, 17, -3, -3, -3, -3, -3, -3, -3, 18, 29, 95, 94,509,508,515,514,521,520,845,844},
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{559,558,553,552,547,546,541,540, 73, 72, 32, -3, -3, -3, -3, -3, -3, 10, 67, 66,115,114,535,534,529,528,523,522,846, -3},
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{561,560,555,554,549,548,543,542, 75, 74, -2, -1, 7, 6, 35, 34, 11, -2, 69, 68,117,116,537,536,531,530,525,524,848,847},
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{563,562,557,556,551,550,545,544, 77, 76, -2, 33, 9, 8, 25, 24, -1, -2, 71, 70,119,118,539,538,533,532,527,526,849, -3},
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{565,564,571,570,577,576,583,582,589,588,595,594,601,600,607,606,613,612,619,618,625,624,631,630,637,636,643,642,851,850},
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{567,566,573,572,579,578,585,584,591,590,597,596,603,602,609,608,615,614,621,620,627,626,633,632,639,638,645,644,852, -3},
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{569,568,575,574,581,580,587,586,593,592,599,598,605,604,611,610,617,616,623,622,629,628,635,634,641,640,647,646,854,853},
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{727,726,721,720,715,714,709,708,703,702,697,696,691,690,685,684,679,678,673,672,667,666,661,660,655,654,649,648,855, -3},
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{729,728,723,722,717,716,711,710,705,704,699,698,693,692,687,686,681,680,675,674,669,668,663,662,657,656,651,650,857,856},
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{731,730,725,724,719,718,713,712,707,706,701,700,695,694,689,688,683,682,677,676,671,670,665,664,659,658,653,652,858, -3},
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{733,732,739,738,745,744,751,750,757,756,763,762,769,768,775,774,781,780,787,786,793,792,799,798,805,804,811,810,860,859},
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{735,734,741,740,747,746,753,752,759,758,765,764,771,770,777,776,783,782,789,788,795,794,801,800,807,806,813,812,861, -3},
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{737,736,743,742,749,748,755,754,761,760,767,766,773,772,779,778,785,784,791,790,797,796,803,802,809,808,815,814,863,862}
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};
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private final BitMatrix bitMatrix;
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/**
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* @param bitMatrix {@link BitMatrix} to parse
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* @throws FormatException if height is not 33 or width is not 30
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*/
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BitMatrixParser(BitMatrix bitMatrix) {
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this.bitMatrix = bitMatrix;
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}
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byte[] readCodewords() {
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byte[] result = new byte[144];
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int height = bitMatrix.getHeight();
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int width = bitMatrix.getWidth();
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for (int y = 0; y < height; y++) {
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int[] bitnrRow = BITNR[y];
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for (int x = 0; x < width; x++) {
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int bit = bitnrRow[x];
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if (bit >= 0 && bitMatrix.get(x, y)) {
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result[bit / 6] |= (byte) (1 << (5 - (bit % 6)));
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}
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}
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}
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return result;
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}
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}
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@ -0,0 +1,192 @@
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/*
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* Copyright 2011 ZXing authors
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*
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* 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.maxicode.decoder;
|
||||
|
||||
import com.google.zxing.common.DecoderResult;
|
||||
import java.text.DecimalFormat;
|
||||
|
||||
/**
|
||||
* <p>MaxiCodes can encode text or structured information as bits in one of several modes,
|
||||
* with multiple character sets in one code. This class decodes the bits back into text.</p>
|
||||
*
|
||||
* @author mike32767
|
||||
* @author Manuel Kasten
|
||||
*/
|
||||
final class DecodedBitStreamParser {
|
||||
|
||||
private static final char SHIFTA = '\uFFF0';
|
||||
private static final char SHIFTB = '\uFFF1';
|
||||
private static final char SHIFTC = '\uFFF2';
|
||||
private static final char SHIFTD = '\uFFF3';
|
||||
private static final char SHIFTE = '\uFFF4';
|
||||
private static final char TWOSHIFTA = '\uFFF5';
|
||||
private static final char THREESHIFTA = '\uFFF6';
|
||||
private static final char LATCHA = '\uFFF7';
|
||||
private static final char LATCHB = '\uFFF8';
|
||||
private static final char LOCK = '\uFFF9';
|
||||
private static final char ECI = '\uFFFA';
|
||||
private static final char NS = '\uFFFB';
|
||||
private static final char PAD = '\uFFFC';
|
||||
private static final char FS = '\u001C';
|
||||
private static final char GS = '\u001D';
|
||||
private static final char RS = '\u001E';
|
||||
private static final DecimalFormat NINE_DIGITS = new DecimalFormat("000000000");
|
||||
private static final DecimalFormat THREE_DIGITS = new DecimalFormat("000");
|
||||
|
||||
private static final String[] SETS = {
|
||||
"\nABCDEFGHIJKLMNOPQRSTUVWXYZ"+ECI+FS+GS+RS+NS+' '+PAD+"\"#$%&'()*+,-./0123456789:"+SHIFTB+SHIFTC+SHIFTD+SHIFTE+LATCHB,
|
||||
"`abcdefghijklmnopqrstuvwxyz"+ECI+FS+GS+RS+NS+'{'+PAD+"}~\u007F;<=>?[\\]^_ ,./:@!|"+PAD+TWOSHIFTA+THREESHIFTA+PAD+SHIFTA+SHIFTC+SHIFTD+SHIFTE+LATCHA,
|
||||
"\u00C0\u00C1\u00C2\u00C3\u00C4\u00C5\u00C6\u00C7\u00C8\u00C9\u00CA\u00CB\u00CC\u00CD\u00CE\u00CF\u00D0\u00D1\u00D2\u00D3\u00D4\u00D5\u00D6\u00D7\u00D8\u00D9\u00DA"+ECI+FS+GS+RS+"\u00DB\u00DC\u00DD\u00DE\u00DF\u00AA\u00AC\u00B1\u00B2\u00B3\u00B5\u00B9\u00BA\u00BC\u00BD\u00BE\u0080\u0081\u0082\u0083\u0084\u0085\u0086\u0087\u0088\u0089"+LATCHA+' '+LOCK+SHIFTD+SHIFTE+LATCHB,
|
||||
"\u00E0\u00E1\u00E2\u00E3\u00E4\u00E5\u00E6\u00E7\u00E8\u00E9\u00EA\u00EB\u00EC\u00ED\u00EE\u00EF\u00F0\u00F1\u00F2\u00F3\u00F4\u00F5\u00F6\u00F7\u00F8\u00F9\u00FA"+ECI+FS+GS+RS+NS+"\u00FB\u00FC\u00FD\u00FE\u00FF\u00A1\u00A8\u00AB\u00AF\u00B0\u00B4\u00B7\u00B8\u00BB\u00BF\u008A\u008B\u008C\u008D\u008E\u008F\u0090\u0091\u0092\u0093\u0094"+LATCHA+' '+SHIFTC+LOCK+SHIFTE+LATCHB,
|
||||
"\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\u0008\u0009\n\u000B\u000C\r\u000E\u000F\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001A"+ECI+PAD+PAD+'\u001B'+NS+FS+GS+RS+"\u001F\u009F\u00A0\u00A2\u00A3\u00A4\u00A5\u00A6\u00A7\u00A9\u00AD\u00AE\u00B6\u0095\u0096\u0097\u0098\u0099\u009A\u009B\u009C\u009D\u009E"+LATCHA+' '+SHIFTC+SHIFTD+LOCK+LATCHB,
|
||||
"\u0000\u0001\u0002\u0003\u0004\u0005\u0006\u0007\u0008\u0009\n\u000B\u000C\r\u000E\u000F\u0010\u0011\u0012\u0013\u0014\u0015\u0016\u0017\u0018\u0019\u001A\u001B\u001C\u001D\u001E\u001F\u0020\u0021\"\u0023\u0024\u0025\u0026\u0027\u0028\u0029\u002A\u002B\u002C\u002D\u002E\u002F\u0030\u0031\u0032\u0033\u0034\u0035\u0036\u0037\u0038\u0039\u003A\u003B\u003C\u003D\u003E\u003F"
|
||||
};
|
||||
|
||||
private DecodedBitStreamParser() {
|
||||
}
|
||||
|
||||
static DecoderResult decode(byte[] bytes, int mode) {
|
||||
StringBuffer result = new StringBuffer(144);
|
||||
switch (mode) {
|
||||
case 2:
|
||||
case 3:
|
||||
String postcode;
|
||||
if (mode == 2) {
|
||||
int pc = getPostCode2(bytes);
|
||||
DecimalFormat df = new DecimalFormat("0000000000".substring(0, getPostCode2Length(bytes)));
|
||||
postcode = df.format(pc);
|
||||
} else {
|
||||
postcode = getPostCode3(bytes);
|
||||
}
|
||||
String country = THREE_DIGITS.format(getCountry(bytes));
|
||||
String service = THREE_DIGITS.format(getServiceClass(bytes));
|
||||
result.append(getMessage(bytes, 10, 84));
|
||||
if (result.toString().startsWith("[)>"+RS+"01"+GS)) {
|
||||
result.insert(9, postcode + GS + country + GS + service + GS);
|
||||
} else {
|
||||
result.insert(0, postcode + GS + country + GS + service + GS);
|
||||
}
|
||||
break;
|
||||
case 4:
|
||||
result.append(getMessage(bytes, 1, 93));
|
||||
break;
|
||||
case 5:
|
||||
result.append(getMessage(bytes, 1, 77));
|
||||
break;
|
||||
}
|
||||
return new DecoderResult(bytes, result.toString(), null, String.valueOf(mode));
|
||||
}
|
||||
|
||||
private static int getBit(int bit, byte[] bytes) {
|
||||
bit--;
|
||||
return (bytes[bit / 6] & (1 << (5 - (bit % 6)))) == 0 ? 0 : 1;
|
||||
}
|
||||
|
||||
private static int getInt(byte[] bytes, byte[] x) {
|
||||
int val = 0;
|
||||
for (int i = 0; i < x.length; i++) {
|
||||
val += getBit(x[i], bytes) << (x.length - i - 1);
|
||||
}
|
||||
return val;
|
||||
}
|
||||
|
||||
private static int getCountry(byte[] bytes) {
|
||||
return getInt(bytes, new byte[] {53, 54, 43, 44, 45, 46, 47, 48, 37, 38});
|
||||
}
|
||||
|
||||
private static int getServiceClass(byte[] bytes) {
|
||||
return getInt(bytes, new byte[] {55, 56, 57, 58, 59, 60, 49, 50, 51, 52});
|
||||
}
|
||||
|
||||
private static int getPostCode2Length(byte[] bytes) {
|
||||
return getInt(bytes, new byte[] {39, 40, 41, 42, 31, 32});
|
||||
}
|
||||
|
||||
private static int getPostCode2(byte[] bytes) {
|
||||
return getInt(bytes, new byte[] {33, 34, 35, 36, 25, 26, 27, 28, 29, 30, 19,
|
||||
20, 21, 22, 23, 24, 13, 14, 15, 16, 17, 18, 7, 8, 9, 10, 11, 12, 1, 2});
|
||||
}
|
||||
|
||||
private static String getPostCode3(byte[] bytes) {
|
||||
return String.valueOf(
|
||||
new char[] {
|
||||
SETS[0].charAt(getInt(bytes, new byte[] {39, 40, 41, 42, 31, 32})),
|
||||
SETS[0].charAt(getInt(bytes, new byte[] {33, 34, 35, 36, 25, 26})),
|
||||
SETS[0].charAt(getInt(bytes, new byte[] {27, 28, 29, 30, 19, 20})),
|
||||
SETS[0].charAt(getInt(bytes, new byte[] {21, 22, 23, 24, 13, 14})),
|
||||
SETS[0].charAt(getInt(bytes, new byte[] {15, 16, 17, 18, 7, 8})),
|
||||
SETS[0].charAt(getInt(bytes, new byte[] { 9, 10, 11, 12, 1, 2})),
|
||||
}
|
||||
);
|
||||
}
|
||||
|
||||
private static String getMessage(byte[] bytes, int start, int len) {
|
||||
StringBuffer sb = new StringBuffer();
|
||||
int shift = -1;
|
||||
int set = 0;
|
||||
int lastset = 0;
|
||||
for (int i = start; i < start + len; i++) {
|
||||
char c = SETS[set].charAt(bytes[i]);
|
||||
switch (c) {
|
||||
case LATCHA:
|
||||
set = 0;
|
||||
shift = -1;
|
||||
break;
|
||||
case LATCHB:
|
||||
set = 1;
|
||||
shift = -1;
|
||||
break;
|
||||
case SHIFTA:
|
||||
case SHIFTB:
|
||||
case SHIFTC:
|
||||
case SHIFTD:
|
||||
case SHIFTE:
|
||||
lastset = set;
|
||||
set = c - SHIFTA;
|
||||
shift = 1;
|
||||
break;
|
||||
case TWOSHIFTA:
|
||||
lastset = set;
|
||||
set = 0;
|
||||
shift = 2;
|
||||
break;
|
||||
case THREESHIFTA:
|
||||
lastset = set;
|
||||
set = 0;
|
||||
shift = 3;
|
||||
break;
|
||||
case NS:
|
||||
int nsval = (bytes[++i] << 24) + (bytes[++i] << 18) + (bytes[++i] << 12) + (bytes[++i] << 6) + bytes[++i];
|
||||
sb.append(NINE_DIGITS.format(nsval));
|
||||
break;
|
||||
case LOCK:
|
||||
shift = -1;
|
||||
break;
|
||||
default:
|
||||
sb.append(c);
|
||||
}
|
||||
if (shift-- == 0) {
|
||||
set = lastset;
|
||||
}
|
||||
}
|
||||
while (sb.length() > 0 && sb.charAt(sb.length() - 1) == PAD) {
|
||||
sb.setLength(sb.length() - 1);
|
||||
}
|
||||
return sb.toString();
|
||||
}
|
||||
|
||||
}
|
||||
116
core/src/com/google/zxing/maxicode/decoder/Decoder.java
Normal file
116
core/src/com/google/zxing/maxicode/decoder/Decoder.java
Normal file
|
|
@ -0,0 +1,116 @@
|
|||
/*
|
||||
* Copyright 2011 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.maxicode.decoder;
|
||||
|
||||
import com.google.zxing.ChecksumException;
|
||||
import com.google.zxing.FormatException;
|
||||
import com.google.zxing.common.BitMatrix;
|
||||
import com.google.zxing.common.DecoderResult;
|
||||
import com.google.zxing.common.reedsolomon.GenericGF;
|
||||
import com.google.zxing.common.reedsolomon.ReedSolomonDecoder;
|
||||
import com.google.zxing.common.reedsolomon.ReedSolomonException;
|
||||
|
||||
import java.util.Hashtable;
|
||||
|
||||
/**
|
||||
* <p>The main class which implements MaxiCode decoding -- as opposed to locating and extracting
|
||||
* the MaxiCode from an image.</p>
|
||||
*
|
||||
* @author Manuel Kasten
|
||||
*/
|
||||
public final class Decoder {
|
||||
|
||||
private static final int ALL = 0;
|
||||
private static final int EVEN = 1;
|
||||
private static final int ODD = 2;
|
||||
|
||||
private final ReedSolomonDecoder rsDecoder;
|
||||
|
||||
public Decoder() {
|
||||
rsDecoder = new ReedSolomonDecoder(GenericGF.MAXICODE_FIELD_64);
|
||||
}
|
||||
|
||||
public DecoderResult decode(BitMatrix bits) throws ChecksumException, FormatException {
|
||||
return decode(bits, null);
|
||||
}
|
||||
|
||||
public DecoderResult decode(BitMatrix bits, Hashtable hints) throws FormatException, ChecksumException {
|
||||
BitMatrixParser parser = new BitMatrixParser(bits);
|
||||
byte[] codewords = parser.readCodewords();
|
||||
|
||||
correctErrors(codewords, 0, 10, 10, ALL);
|
||||
int mode = codewords[0] & 0x0F;
|
||||
byte[] datawords;
|
||||
switch (mode) {
|
||||
case 2:
|
||||
case 3:
|
||||
case 4:
|
||||
correctErrors(codewords, 20, 84, 40, EVEN);
|
||||
correctErrors(codewords, 20, 84, 40, ODD);
|
||||
datawords = new byte[94];
|
||||
break;
|
||||
case 5:
|
||||
correctErrors(codewords, 20, 68, 56, EVEN);
|
||||
correctErrors(codewords, 20, 68, 56, ODD);
|
||||
datawords = new byte[78];
|
||||
break;
|
||||
default:
|
||||
throw FormatException.getFormatInstance();
|
||||
}
|
||||
|
||||
for (int i = 0; i < 10; i++) {
|
||||
datawords[i] = codewords[i];
|
||||
}
|
||||
for (int i = 20; i < datawords.length + 10; i++) {
|
||||
datawords[i - 10] = codewords[i];
|
||||
}
|
||||
|
||||
return DecodedBitStreamParser.decode(datawords, mode);
|
||||
}
|
||||
|
||||
private void correctErrors(byte[] codewordBytes,
|
||||
int start,
|
||||
int dataCodewords,
|
||||
int ecCodewords,
|
||||
int mode) throws ChecksumException {
|
||||
int codewords = dataCodewords + ecCodewords;
|
||||
|
||||
// in EVEN or ODD mode only half the codewords
|
||||
int divisor = mode == ALL ? 1 : 2;
|
||||
|
||||
// First read into an array of ints
|
||||
int[] codewordsInts = new int[codewords / divisor];
|
||||
for (int i = 0; i < codewords; i++) {
|
||||
if ((mode == ALL) || (i % 2 == (mode - 1))) {
|
||||
codewordsInts[i / divisor] = codewordBytes[i + start] & 0xFF;
|
||||
}
|
||||
}
|
||||
try {
|
||||
rsDecoder.decode(codewordsInts, ecCodewords / divisor);
|
||||
} catch (ReedSolomonException rse) {
|
||||
throw ChecksumException.getChecksumInstance();
|
||||
}
|
||||
// Copy back into array of bytes -- only need to worry about the bytes that were data
|
||||
// We don't care about errors in the error-correction codewords
|
||||
for (int i = 0; i < dataCodewords; i++) {
|
||||
if ((mode == ALL) || (i % 2 == (mode - 1))) {
|
||||
codewordBytes[i + start] = (byte) codewordsInts[i / divisor];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -163,6 +163,7 @@ public final class CommandLineRunner {
|
|||
vector.addElement(BarcodeFormat.AZTEC);
|
||||
vector.addElement(BarcodeFormat.PDF_417);
|
||||
vector.addElement(BarcodeFormat.CODABAR);
|
||||
vector.addElement(BarcodeFormat.MAXICODE);
|
||||
}
|
||||
hints.put(DecodeHintType.POSSIBLE_FORMATS, vector);
|
||||
if (config.isTryHarder()) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue