Add ResultMetadataType.ERRORS_CORRECTED and ERASURES_CORRECTED (#1657)

* Add ResultMetadataType.ERRORS_CORRECTED and ERASURES_CORRECTED (2D barcodes)

* Maintain existing constructor on AztecDetectorResult

* Maintain existing ReedSolomonDecoder.decode method

core/src/main/java/com/google/zxing/ResultMetadataType.java

@@ -55,6 +55,18 @@ public enum ResultMetadataType {
    */
   ERROR_CORRECTION_LEVEL,
 
+  /**
+   * The number of errors corrected. If applicable, maps to an {@link Integer} of value
+   * greater than or equal to zero.
+   */
+  ERRORS_CORRECTED,
+
+  /**
+   * The number of erasures corrected. If applicable, maps to an {@link Integer} of value
+   * greater than or equal to zero.
+   */
+  ERASURES_CORRECTED,
+
   /**
    * For some periodicals, indicates the issue number as an {@link Integer}.
    */
@@ -73,12 +85,12 @@ public enum ResultMetadataType {
   POSSIBLE_COUNTRY,
 
   /**
-   * For some products, the extension text
+   * For some products, the extension text.
    */
   UPC_EAN_EXTENSION,
 
   /**
-   * PDF417-specific metadata
+   * PDF417-specific metadata.
    */
   PDF417_EXTRA_METADATA,
 

core/src/main/java/com/google/zxing/aztec/AztecDetectorResult.java

@@ -31,16 +31,27 @@ public final class AztecDetectorResult extends DetectorResult {
   private final boolean compact;
   private final int nbDatablocks;
   private final int nbLayers;
+  private final int errorsCorrected;
 
   public AztecDetectorResult(BitMatrix bits,
                              ResultPoint[] points,
                              boolean compact,
                              int nbDatablocks,
                              int nbLayers) {
+    this(bits, points, compact, nbDatablocks, nbLayers, 0);
+  }
+
+  public AztecDetectorResult(BitMatrix bits,
+                             ResultPoint[] points,
+                             boolean compact,
+                             int nbDatablocks,
+                             int nbLayers,
+                             int errorsCorrected) {
     super(bits, points);
     this.compact = compact;
     this.nbDatablocks = nbDatablocks;
     this.nbLayers = nbLayers;
+    this.errorsCorrected = errorsCorrected;
   }
 
   public int getNbLayers() {
@@ -55,4 +66,7 @@ public final class AztecDetectorResult extends DetectorResult {
     return compact;
   }
 
+  public int getErrorsCorrected() {
+    return errorsCorrected;
+  }
 }

core/src/main/java/com/google/zxing/aztec/AztecReader.java

@@ -61,9 +61,11 @@ public final class AztecReader implements Reader {
     Detector detector = new Detector(image.getBlackMatrix());
     ResultPoint[] points = null;
     DecoderResult decoderResult = null;
+    int errorsCorrected = 0;
     try {
       AztecDetectorResult detectorResult = detector.detect(false);
       points = detectorResult.getPoints();
+      errorsCorrected = detectorResult.getErrorsCorrected();
       decoderResult = new Decoder().decode(detectorResult);
     } catch (NotFoundException e) {
       notFoundException = e;
@@ -74,6 +76,7 @@ public final class AztecReader implements Reader {
       try {
         AztecDetectorResult detectorResult = detector.detect(true);
         points = detectorResult.getPoints();
+        errorsCorrected = detectorResult.getErrorsCorrected();
         decoderResult = new Decoder().decode(detectorResult);
       } catch (NotFoundException | FormatException e) {
         if (notFoundException != null) {
@@ -110,6 +113,8 @@ public final class AztecReader implements Reader {
     if (ecLevel != null) {
       result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, ecLevel);
     }
+    errorsCorrected += decoderResult.getErrorsCorrected();
+    result.putMetadata(ResultMetadataType.ERRORS_CORRECTED, errorsCorrected);
     result.putMetadata(ResultMetadataType.SYMBOLOGY_IDENTIFIER, "]z" + decoderResult.getSymbologyModifier());
 
     return result;

core/src/main/java/com/google/zxing/aztec/decoder/Decoder.java

@@ -87,6 +87,7 @@ public final class Decoder {
     DecoderResult decoderResult =
         new DecoderResult(rawBytes, result, null, String.format("%d%%", correctedBits.ecLevel));
     decoderResult.setNumBits(correctedBits.correctBits.length);
+    decoderResult.setErrorsCorrected(correctedBits.errorsCorrected);
     return decoderResult;
   }
 
@@ -264,10 +265,12 @@ public final class Decoder {
 
   static final class CorrectedBitsResult {
     private final boolean[] correctBits;
+    private final int errorsCorrected;
     private final int ecLevel;
 
-    CorrectedBitsResult(boolean[] correctBits, int ecLevel) {
+    CorrectedBitsResult(boolean[] correctBits, int errorsCorrected, int ecLevel) {
       this.correctBits = correctBits;
+      this.errorsCorrected = errorsCorrected;
       this.ecLevel = ecLevel;
     }
   }
@@ -308,9 +311,10 @@ public final class Decoder {
       dataWords[i] = readCode(rawbits, offset, codewordSize);
     }
 
+    int errorsCorrected = 0;
     try {
       ReedSolomonDecoder rsDecoder = new ReedSolomonDecoder(gf);
-      rsDecoder.decode(dataWords, numCodewords - numDataCodewords);
+      errorsCorrected = rsDecoder.decodeWithECCount(dataWords, numCodewords - numDataCodewords);
     } catch (ReedSolomonException ex) {
       throw FormatException.getFormatInstance(ex);
     }
@@ -343,7 +347,8 @@ public final class Decoder {
       }
     }
 
-    return new CorrectedBitsResult(correctedBits, 100 * (numCodewords - numDataCodewords) / numCodewords);
+    int ecLevel = 100 * (numCodewords - numDataCodewords) / numCodewords;
+    return new CorrectedBitsResult(correctedBits, errorsCorrected, ecLevel);
   }
 
   /**

core/src/main/java/com/google/zxing/aztec/detector/Detector.java

@@ -82,7 +82,7 @@ public final class Detector {
     }
 
     // 3. Get the size of the matrix and other parameters from the bull's eye
-    extractParameters(bullsEyeCorners);
+    int errorsCorrected = extractParameters(bullsEyeCorners);
 
     // 4. Sample the grid
     BitMatrix bits = sampleGrid(image,
@@ -94,16 +94,17 @@ public final class Detector {
     // 5. Get the corners of the matrix.
     ResultPoint[] corners = getMatrixCornerPoints(bullsEyeCorners);
 
-    return new AztecDetectorResult(bits, corners, compact, nbDataBlocks, nbLayers);
+    return new AztecDetectorResult(bits, corners, compact, nbDataBlocks, nbLayers, errorsCorrected);
   }
 
   /**
    * Extracts the number of data layers and data blocks from the layer around the bull's eye.
    *
    * @param bullsEyeCorners the array of bull's eye corners
+   * @return the number of errors corrected during parameter extraction
    * @throws NotFoundException in case of too many errors or invalid parameters
    */
-  private void extractParameters(ResultPoint[] bullsEyeCorners) throws NotFoundException {
+  private int extractParameters(ResultPoint[] bullsEyeCorners) throws NotFoundException {
     if (!isValid(bullsEyeCorners[0]) || !isValid(bullsEyeCorners[1]) ||
         !isValid(bullsEyeCorners[2]) || !isValid(bullsEyeCorners[3])) {
       throw NotFoundException.getNotFoundInstance();
@@ -140,7 +141,8 @@ public final class Detector {
 
     // Corrects parameter data using RS.  Returns just the data portion
     // without the error correction.
-    int correctedData = getCorrectedParameterData(parameterData, compact);
+    CorrectedParameter correctedParam = getCorrectedParameterData(parameterData, compact);
+    int correctedData = correctedParam.getData();
 
     if (compact) {
       // 8 bits:  2 bits layers and 6 bits data blocks
@@ -151,6 +153,8 @@ public final class Detector {
       nbLayers = (correctedData >> 11) + 1;
       nbDataBlocks = (correctedData & 0x7FF) + 1;
     }
+
+    return correctedParam.getErrorsCorrected();
   }
 
   private static int getRotation(int[] sides, int length) throws NotFoundException {
@@ -189,9 +193,11 @@ public final class Detector {
    *
    * @param parameterData parameter bits
    * @param compact true if this is a compact Aztec code
+   * @return the corrected parameter
    * @throws NotFoundException if the array contains too many errors
    */
-  private static int getCorrectedParameterData(long parameterData, boolean compact) throws NotFoundException {
+  private static CorrectedParameter getCorrectedParameterData(long parameterData,
+                                                              boolean compact) throws NotFoundException {
     int numCodewords;
     int numDataCodewords;
 
@@ -209,18 +215,21 @@ public final class Detector {
       parameterWords[i] = (int) parameterData & 0xF;
       parameterData >>= 4;
     }
+
+    int errorsCorrected = 0;
     try {
       ReedSolomonDecoder rsDecoder = new ReedSolomonDecoder(GenericGF.AZTEC_PARAM);
-      rsDecoder.decode(parameterWords, numECCodewords);
+      errorsCorrected = rsDecoder.decodeWithECCount(parameterWords, numECCodewords);
     } catch (ReedSolomonException ignored) {
       throw NotFoundException.getNotFoundInstance();
     }
+
     // Toss the error correction.  Just return the data as an integer
     int result = 0;
     for (int i = 0; i < numDataCodewords; i++) {
       result = (result << 4) + parameterWords[i];
     }
-    return result;
+    return new CorrectedParameter(result, errorsCorrected);
   }
 
   /**
@@ -600,4 +609,22 @@ public final class Detector {
       return "<" + x + ' ' + y + '>';
     }
   }
+
+  static final class CorrectedParameter {
+    private final int data;
+    private final int errorsCorrected;
+
+    CorrectedParameter(int data, int errorsCorrected) {
+      this.data = data;
+      this.errorsCorrected = errorsCorrected;
+    }
+
+    int getData() {
+      return data;
+    }
+
+    int getErrorsCorrected() {
+      return errorsCorrected;
+    }
+  }
 }

core/src/main/java/com/google/zxing/common/reedsolomon/ReedSolomonDecoder.java

@@ -56,6 +56,20 @@ public final class ReedSolomonDecoder {
    * @throws ReedSolomonException if decoding fails for any reason
    */
   public void decode(int[] received, int twoS) throws ReedSolomonException {
+    decodeWithECCount(received, twoS);
+  }
+
+  /**
+   * <p>Decodes given set of received codewords, which include both data and error-correction
+   * codewords. Really, this means it uses Reed-Solomon to detect and correct errors, in-place,
+   * in the input.</p>
+   *
+   * @param received data and error-correction codewords
+   * @param twoS number of error-correction codewords available
+   * @return the number of errors corrected
+   * @throws ReedSolomonException if decoding fails for any reason
+   */
+  public int decodeWithECCount(int[] received, int twoS) throws ReedSolomonException {
     GenericGFPoly poly = new GenericGFPoly(field, received);
     int[] syndromeCoefficients = new int[twoS];
     boolean noError = true;
@@ -67,7 +81,7 @@ public final class ReedSolomonDecoder {
       }
     }
     if (noError) {
-      return;
+      return 0;
     }
     GenericGFPoly syndrome = new GenericGFPoly(field, syndromeCoefficients);
     GenericGFPoly[] sigmaOmega =
@@ -83,6 +97,7 @@ public final class ReedSolomonDecoder {
       }
       received[position] = GenericGF.addOrSubtract(received[position], errorMagnitudes[i]);
     }
+    return errorLocations.length;
   }
 
   private GenericGFPoly[] runEuclideanAlgorithm(GenericGFPoly a, GenericGFPoly b, int R)

core/src/main/java/com/google/zxing/datamatrix/DataMatrixReader.java

@@ -83,6 +83,7 @@ public final class DataMatrixReader implements Reader {
     if (ecLevel != null) {
       result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, ecLevel);
     }
+    result.putMetadata(ResultMetadataType.ERRORS_CORRECTED, decoderResult.getErrorsCorrected());
     result.putMetadata(ResultMetadataType.SYMBOLOGY_IDENTIFIER, "]d" + decoderResult.getSymbologyModifier());
     return result;
   }

core/src/main/java/com/google/zxing/datamatrix/decoder/Decoder.java

@@ -78,13 +78,14 @@ public final class Decoder {
     }
     byte[] resultBytes = new byte[totalBytes];
 
+    int errorsCorrected = 0;
     int dataBlocksCount = dataBlocks.length;
     // Error-correct and copy data blocks together into a stream of bytes
     for (int j = 0; j < dataBlocksCount; j++) {
       DataBlock dataBlock = dataBlocks[j];
       byte[] codewordBytes = dataBlock.getCodewords();
       int numDataCodewords = dataBlock.getNumDataCodewords();
-      correctErrors(codewordBytes, numDataCodewords);
+      errorsCorrected += correctErrors(codewordBytes, numDataCodewords);
       for (int i = 0; i < numDataCodewords; i++) {
         // De-interlace data blocks.
         resultBytes[i * dataBlocksCount + j] = codewordBytes[i];
@@ -92,7 +93,9 @@ public final class Decoder {
     }
 
     // Decode the contents of that stream of bytes
-    return DecodedBitStreamParser.decode(resultBytes);
+    DecoderResult result = DecodedBitStreamParser.decode(resultBytes);
+    result.setErrorsCorrected(errorsCorrected);
+    return result;
   }
 
   /**
@@ -101,17 +104,19 @@ public final class Decoder {
    *
    * @param codewordBytes data and error correction codewords
    * @param numDataCodewords number of codewords that are data bytes
+   * @return the number of errors corrected
    * @throws ChecksumException if error correction fails
    */
-  private void correctErrors(byte[] codewordBytes, int numDataCodewords) throws ChecksumException {
+  private int correctErrors(byte[] codewordBytes, int numDataCodewords) throws ChecksumException {
     int numCodewords = codewordBytes.length;
     // First read into an array of ints
     int[] codewordsInts = new int[numCodewords];
     for (int i = 0; i < numCodewords; i++) {
       codewordsInts[i] = codewordBytes[i] & 0xFF;
     }
+    int errorsCorrected = 0;
     try {
-      rsDecoder.decode(codewordsInts, codewordBytes.length - numDataCodewords);
+      errorsCorrected = rsDecoder.decodeWithECCount(codewordsInts, codewordBytes.length - numDataCodewords);
     } catch (ReedSolomonException ignored) {
       throw ChecksumException.getChecksumInstance();
     }
@@ -120,6 +125,7 @@ public final class Decoder {
     for (int i = 0; i < numDataCodewords; i++) {
       codewordBytes[i] = (byte) codewordsInts[i];
     }
+    return errorsCorrected;
   }
 
 }

core/src/main/java/com/google/zxing/maxicode/MaxiCodeReader.java

@@ -64,7 +64,7 @@ public final class MaxiCodeReader implements Reader {
     BitMatrix bits = extractPureBits(image.getBlackMatrix());
     DecoderResult decoderResult = decoder.decode(bits, hints);
     Result result = new Result(decoderResult.getText(), decoderResult.getRawBytes(), NO_POINTS, BarcodeFormat.MAXICODE);
-
+    result.putMetadata(ResultMetadataType.ERRORS_CORRECTED, decoderResult.getErrorsCorrected());
     String ecLevel = decoderResult.getECLevel();
     if (ecLevel != null) {
       result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, ecLevel);

core/src/main/java/com/google/zxing/maxicode/decoder/Decoder.java

@@ -54,20 +54,20 @@ public final class Decoder {
     BitMatrixParser parser = new BitMatrixParser(bits);
     byte[] codewords = parser.readCodewords();
 
-    correctErrors(codewords, 0, 10, 10, ALL);
+    int errorsCorrected = 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);
+        errorsCorrected += correctErrors(codewords, 20, 84, 40, EVEN);
-        correctErrors(codewords, 20, 84, 40, ODD);
+        errorsCorrected += correctErrors(codewords, 20, 84, 40, ODD);
         datawords = new byte[94];
         break;
       case 5:
-        correctErrors(codewords, 20, 68, 56, EVEN);
+        errorsCorrected += correctErrors(codewords, 20, 68, 56, EVEN);
-        correctErrors(codewords, 20, 68, 56, ODD);
+        errorsCorrected += correctErrors(codewords, 20, 68, 56, ODD);
         datawords = new byte[78];
         break;
       default:
@@ -77,10 +77,12 @@ public final class Decoder {
     System.arraycopy(codewords, 0, datawords, 0, 10);
     System.arraycopy(codewords, 20, datawords, 10, datawords.length - 10);
 
-    return DecodedBitStreamParser.decode(datawords, mode);
+    DecoderResult result = DecodedBitStreamParser.decode(datawords, mode);
+    result.setErrorsCorrected(errorsCorrected);
+    return result;
   }
 
-  private void correctErrors(byte[] codewordBytes,
+  private int correctErrors(byte[] codewordBytes,
                              int start,
                              int dataCodewords,
                              int ecCodewords,
@@ -97,8 +99,9 @@ public final class Decoder {
         codewordsInts[i / divisor] = codewordBytes[i + start] & 0xFF;
       }
     }
+    int errorsCorrected = 0;
     try {
-      rsDecoder.decode(codewordsInts, ecCodewords / divisor);
+      errorsCorrected = rsDecoder.decodeWithECCount(codewordsInts, ecCodewords / divisor);
     } catch (ReedSolomonException ignored) {
       throw ChecksumException.getChecksumInstance();
     }
@@ -109,6 +112,7 @@ public final class Decoder {
         codewordBytes[i + start] = (byte) codewordsInts[i / divisor];
       }
     }
+    return errorsCorrected;
   }
 
 }

core/src/main/java/com/google/zxing/pdf417/PDF417Reader.java

@@ -90,6 +90,8 @@ public final class PDF417Reader implements Reader, MultipleBarcodeReader {
           points[6], points[7], getMinCodewordWidth(points), getMaxCodewordWidth(points));
       Result result = new Result(decoderResult.getText(), decoderResult.getRawBytes(), points, BarcodeFormat.PDF_417);
       result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, decoderResult.getECLevel());
+      result.putMetadata(ResultMetadataType.ERRORS_CORRECTED, decoderResult.getErrorsCorrected());
+      result.putMetadata(ResultMetadataType.ERASURES_CORRECTED, decoderResult.getErasures());
       PDF417ResultMetadata pdf417ResultMetadata = (PDF417ResultMetadata) decoderResult.getOther();
       if (pdf417ResultMetadata != null) {
         result.putMetadata(ResultMetadataType.PDF417_EXTRA_METADATA, pdf417ResultMetadata);

core/src/main/java/com/google/zxing/qrcode/QRCodeReader.java

@@ -99,6 +99,7 @@ public class QRCodeReader implements Reader {
       result.putMetadata(ResultMetadataType.STRUCTURED_APPEND_PARITY,
                          decoderResult.getStructuredAppendParity());
     }
+    result.putMetadata(ResultMetadataType.ERRORS_CORRECTED, decoderResult.getErrorsCorrected());
     result.putMetadata(ResultMetadataType.SYMBOLOGY_IDENTIFIER, "]Q" + decoderResult.getSymbologyModifier());
     return result;
   }

core/src/main/java/com/google/zxing/qrcode/decoder/Decoder.java

@@ -146,17 +146,20 @@ public final class Decoder {
     int resultOffset = 0;
 
     // Error-correct and copy data blocks together into a stream of bytes
+    int errorsCorrected = 0;
     for (DataBlock dataBlock : dataBlocks) {
       byte[] codewordBytes = dataBlock.getCodewords();
       int numDataCodewords = dataBlock.getNumDataCodewords();
-      correctErrors(codewordBytes, numDataCodewords);
+      errorsCorrected += correctErrors(codewordBytes, numDataCodewords);
       for (int i = 0; i < numDataCodewords; i++) {
         resultBytes[resultOffset++] = codewordBytes[i];
       }
     }
 
     // Decode the contents of that stream of bytes
-    return DecodedBitStreamParser.decode(resultBytes, version, ecLevel, hints);
+    DecoderResult result = DecodedBitStreamParser.decode(resultBytes, version, ecLevel, hints);
+    result.setErrorsCorrected(errorsCorrected);
+    return result;
   }
 
   /**
@@ -165,17 +168,19 @@ public final class Decoder {
    *
    * @param codewordBytes data and error correction codewords
    * @param numDataCodewords number of codewords that are data bytes
+   * @return the number of errors corrected
    * @throws ChecksumException if error correction fails
    */
-  private void correctErrors(byte[] codewordBytes, int numDataCodewords) throws ChecksumException {
+  private int correctErrors(byte[] codewordBytes, int numDataCodewords) throws ChecksumException {
     int numCodewords = codewordBytes.length;
     // First read into an array of ints
     int[] codewordsInts = new int[numCodewords];
     for (int i = 0; i < numCodewords; i++) {
       codewordsInts[i] = codewordBytes[i] & 0xFF;
     }
+    int errorsCorrected = 0;
     try {
-      rsDecoder.decode(codewordsInts, codewordBytes.length - numDataCodewords);
+      errorsCorrected = rsDecoder.decodeWithECCount(codewordsInts, codewordBytes.length - numDataCodewords);
     } catch (ReedSolomonException ignored) {
       throw ChecksumException.getChecksumInstance();
     }
@@ -184,6 +189,7 @@ public final class Decoder {
     for (int i = 0; i < numDataCodewords; i++) {
       codewordBytes[i] = (byte) codewordsInts[i];
     }
+    return errorsCorrected;
   }
 
 }

core/src/test/java/com/google/zxing/aztec/AztecBlackBox1TestCase.java

@@ -26,10 +26,10 @@ public final class AztecBlackBox1TestCase extends AbstractBlackBoxTestCase {
 
   public AztecBlackBox1TestCase() {
     super("src/test/resources/blackbox/aztec-1", new AztecReader(), BarcodeFormat.AZTEC);
-    addTest(14, 14, 0.0f);
+    addTest(15, 15, 0.0f);
-    addTest(14, 14, 90.0f);
+    addTest(15, 15, 90.0f);
-    addTest(14, 14, 180.0f);
+    addTest(15, 15, 180.0f);
-    addTest(14, 14, 270.0f);
+    addTest(15, 15, 270.0f);
   }
 
 }

core/src/test/java/com/google/zxing/aztec/encoder/EncoderTest.java

@@ -493,7 +493,7 @@ public final class EncoderTest extends Assert {
     assertEquals("Unexpected nr. of layers", layers, aztec.getLayers());
     BitMatrix matrix = aztec.getMatrix();
     AztecDetectorResult r =
-        new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers());
+        new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
     DecoderResult res = new Decoder().decode(r);
     assertEquals(data, res.getText());
     // Check error correction by introducing a few minor errors
@@ -502,7 +502,7 @@ public final class EncoderTest extends Assert {
     matrix.flip(random.nextInt(matrix.getWidth()), matrix.getHeight() - 2 + random.nextInt(2));
     matrix.flip(random.nextInt(2), random.nextInt(matrix.getHeight()));
     matrix.flip(matrix.getWidth() - 2 + random.nextInt(2), random.nextInt(matrix.getHeight()));
-    r = new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers());
+    r = new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
     res = new Decoder().decode(r);
     assertEquals(data, res.getText());
   }
@@ -527,7 +527,7 @@ public final class EncoderTest extends Assert {
     BitMatrix matrix2 = aztec.getMatrix();
     assertEquals(matrix, matrix2);
     AztecDetectorResult r =
-        new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers());
+        new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
     DecoderResult res = new Decoder().decode(r);
     assertEquals(data, res.getText());
     // Check error correction by introducing up to eccPercent/2 errors
@@ -543,7 +543,7 @@ public final class EncoderTest extends Assert {
                 : matrix.getHeight() - 1 - random.nextInt(aztec.getLayers() * 2);
       matrix.flip(x, y);
     }
-    r = new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers());
+    r = new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
     res = new Decoder().decode(r);
     assertEquals(data, res.getText());
   }

core/src/test/java/com/google/zxing/common/AbstractBlackBoxTestCase.java

@@ -165,6 +165,8 @@ public abstract class AbstractBlackBoxTestCase extends Assert {
         try (BufferedReader reader = Files.newBufferedReader(expectedMetadataFile, StandardCharsets.UTF_8)) {
           expectedMetadata.load(reader);
         }
+        correctInteger(expectedMetadata, ResultMetadataType.ERRORS_CORRECTED);
+        correctInteger(expectedMetadata, ResultMetadataType.ERASURES_CORRECTED);
       }
 
       for (int x = 0; x < testCount; x++) {
@@ -249,6 +251,15 @@ public abstract class AbstractBlackBoxTestCase extends Assert {
     }
   }
 
+  private static void correctInteger(Properties metadata, ResultMetadataType key) {
+    String skey = key.toString();
+    if (metadata.containsKey(skey)) {
+      String sval = metadata.getProperty(skey);
+      Integer ival = Integer.parseInt(sval);
+      metadata.put(skey, ival);
+    }
+  }
+
   private boolean decode(BinaryBitmap source,
                          float rotation,
                          String expectedText,

core/src/test/java/com/google/zxing/datamatrix/DataMatrixBlackBox1TestCase.java

@@ -27,10 +27,10 @@ public final class DataMatrixBlackBox1TestCase extends AbstractBlackBoxTestCase
 
   public DataMatrixBlackBox1TestCase() {
     super("src/test/resources/blackbox/datamatrix-1", new MultiFormatReader(), BarcodeFormat.DATA_MATRIX);
-    addTest(21, 21, 0.0f);
+    addTest(22, 22, 0.0f);
-    addTest(21, 21, 90.0f);
+    addTest(22, 22, 90.0f);
-    addTest(21, 21, 180.0f);
+    addTest(22, 22, 180.0f);
-    addTest(21, 21, 270.0f);
+    addTest(22, 22, 270.0f);
   }
 
 }

core/src/test/java/com/google/zxing/maxicode/MaxiCodeBlackBox1TestCase.java

@@ -32,7 +32,7 @@ public final class MaxiCodeBlackBox1TestCase extends AbstractBlackBoxTestCase {
   public MaxiCodeBlackBox1TestCase() {
     super("src/test/resources/blackbox/maxicode-1", new MultiFormatReader(), BarcodeFormat.MAXICODE);
     addHint(DecodeHintType.PURE_BARCODE);
-    addTest(7, 7, 0.0f);
+    addTest(8, 8, 0.0f);
   }
 
 }

core/src/test/java/com/google/zxing/maxicode/Maxicode1TestCase.java

@@ -27,7 +27,7 @@ public final class Maxicode1TestCase extends AbstractBlackBoxTestCase {
 
   public Maxicode1TestCase() {
     super("src/test/resources/blackbox/maxicode-1", new MultiFormatReader(), BarcodeFormat.MAXICODE);
-    addTest(7, 7, 0.0f);
+    addTest(8, 8, 0.0f);
   }
 
 }

core/src/test/java/com/google/zxing/pdf417/PDF417BlackBox1TestCase.java

@@ -29,10 +29,10 @@ public final class PDF417BlackBox1TestCase extends AbstractBlackBoxTestCase {
 
   public PDF417BlackBox1TestCase() {
     super("src/test/resources/blackbox/pdf417-1", new MultiFormatReader(), BarcodeFormat.PDF_417);
-    addTest(12, 12, 0.0f);
+    addTest(13, 13, 0.0f);
-    addTest(12, 12, 90.0f);
+    addTest(13, 13, 90.0f);
-    addTest(12, 12, 180.0f);
+    addTest(13, 13, 180.0f);
-    addTest(12, 12, 270.0f);
+    addTest(13, 13, 270.0f);
   }
 
 }

core/src/test/java/com/google/zxing/qrcode/QRCodeBlackBox2TestCase.java

@@ -27,10 +27,10 @@ public final class QRCodeBlackBox2TestCase extends AbstractBlackBoxTestCase {
 
   public QRCodeBlackBox2TestCase() {
     super("src/test/resources/blackbox/qrcode-2", new MultiFormatReader(), BarcodeFormat.QR_CODE);
-    addTest(31, 31, 0.0f);
+    addTest(32, 32, 0.0f);
-    addTest(29, 29, 90.0f);
+    addTest(30, 30, 90.0f);
-    addTest(30, 30, 180.0f);
+    addTest(31, 31, 180.0f);
-    addTest(30, 30, 270.0f);
+    addTest(31, 31, 270.0f);
   }
 
 }

core/src/test/resources/blackbox/aztec-1/hello-with-errors.metadata.txt

@@ -0,0 +1 @@
+ERRORS_CORRECTED=3

core/src/test/resources/blackbox/aztec-1/hello-with-errors.txt

@@ -0,0 +1 @@
+hello

core/src/test/resources/blackbox/aztec-1/hello.metadata.txt

@@ -0,0 +1 @@
+ERRORS_CORRECTED=0

core/src/test/resources/blackbox/datamatrix-1/0123456789.metadata.txt

@@ -1 +1,2 @@
 SYMBOLOGY_IDENTIFIER=]d1
+ERRORS_CORRECTED=0

core/src/test/resources/blackbox/datamatrix-1/abcdefg-with-errors.metadata.txt

@@ -0,0 +1 @@
+ERRORS_CORRECTED=2

core/src/test/resources/blackbox/datamatrix-1/abcdefg-with-errors.txt

@@ -0,0 +1 @@
+abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*(),./\

core/src/test/resources/blackbox/maxicode-1/1.metadata.txt

@@ -0,0 +1 @@
+ERRORS_CORRECTED=0

core/src/test/resources/blackbox/maxicode-1/with-errors.metadata.txt

@@ -0,0 +1 @@
+ERRORS_CORRECTED=3

core/src/test/resources/blackbox/maxicode-1/with-errors.txt

@@ -0,0 +1 @@
+
ABCDEFGHIJKLMNOPQRSTUVWXYZ "#$%&'()*+,-./01234:56789

core/src/test/resources/blackbox/pdf417-1/01.metadata.txt

@@ -1 +1,3 @@
 SYMBOLOGY_IDENTIFIER=]L0
+ERRORS_CORRECTED=0
+ERASURES_CORRECTED=0

core/src/test/resources/blackbox/pdf417-1/14.metadata.txt

@@ -0,0 +1,2 @@
+ERRORS_CORRECTED=4
+ERASURES_CORRECTED=3

core/src/test/resources/blackbox/pdf417-1/14.txt

@@ -0,0 +1 @@
+This is PDF417

core/src/test/resources/blackbox/qrcode-1/1.metadata.txt

@@ -1 +1,2 @@
 SYMBOLOGY_IDENTIFIER=]Q1
+ERRORS_CORRECTED=0

core/src/test/resources/blackbox/qrcode-2/36.metadata.txt

@@ -0,0 +1 @@
+ERRORS_CORRECTED=2

core/src/test/resources/blackbox/qrcode-2/36.txt

@@ -0,0 +1 @@
+Morden