void setRowNumbers() {
for (Codeword codeword : getCodewords()) {
if (codeword != null) {
codeword.setRowNumberAsRowIndicatorColumn();
}
}
}
BarcodeMetadata getBarcodeMetadata() {
Codeword[] codewords = getCodewords();
BarcodeValue barcodeColumnCount = new BarcodeValue();
BarcodeValue barcodeRowCountUpperPart = new BarcodeValue();
BarcodeValue barcodeRowCountLowerPart = new BarcodeValue();
BarcodeValue barcodeECLevel = new BarcodeValue();
for (Codeword codeword : codewords) {
if (codeword == null) {
continue;
}
codeword.setRowNumberAsRowIndicatorColumn();
int rowIndicatorValue = codeword.getValue() % 30;
int codewordRowNumber = codeword.getRowNumber();
if (!isLeft) {
codewordRowNumber += 2;
}
switch (codewordRowNumber % 3) {
case 0:
barcodeRowCountUpperPart.setValue(rowIndicatorValue * 3 + 1);
break;
case 1:
barcodeECLevel.setValue(rowIndicatorValue / 3);
barcodeRowCountLowerPart.setValue(rowIndicatorValue % 3);
break;
case 2:
barcodeColumnCount.setValue(rowIndicatorValue + 1);
break;
}
}
// Maybe we should check if we have ambiguous values?
if ((barcodeColumnCount.getValue().length == 0)
|| (barcodeRowCountUpperPart.getValue().length == 0)
|| (barcodeRowCountLowerPart.getValue().length == 0)
|| (barcodeECLevel.getValue().length == 0)
|| barcodeColumnCount.getValue()[0] < 1
|| barcodeRowCountUpperPart.getValue()[0] + barcodeRowCountLowerPart.getValue()[0]
< PDF417Common.MIN_ROWS_IN_BARCODE
|| barcodeRowCountUpperPart.getValue()[0] + barcodeRowCountLowerPart.getValue()[0]
> PDF417Common.MAX_ROWS_IN_BARCODE) {
return null;
}
BarcodeMetadata barcodeMetadata =
new BarcodeMetadata(
barcodeColumnCount.getValue()[0],
barcodeRowCountUpperPart.getValue()[0],
barcodeRowCountLowerPart.getValue()[0],
barcodeECLevel.getValue()[0]);
removeIncorrectCodewords(codewords, barcodeMetadata);
return barcodeMetadata;
}
// TODO maybe we should add missing codewords to store the correct row number to make
// finding row numbers for other columns easier
// use row height count to make detection of invalid row numbers more reliable
int adjustIncompleteIndicatorColumnRowNumbers(BarcodeMetadata barcodeMetadata) {
BoundingBox boundingBox = getBoundingBox();
ResultPoint top = isLeft ? boundingBox.getTopLeft() : boundingBox.getTopRight();
ResultPoint bottom = isLeft ? boundingBox.getBottomLeft() : boundingBox.getBottomRight();
int firstRow = imageRowToCodewordIndex((int) top.getY());
int lastRow = imageRowToCodewordIndex((int) bottom.getY());
float averageRowHeight = (lastRow - firstRow) / (float) barcodeMetadata.getRowCount();
Codeword[] codewords = getCodewords();
int barcodeRow = -1;
int maxRowHeight = 1;
int currentRowHeight = 0;
for (int codewordsRow = firstRow; codewordsRow < lastRow; codewordsRow++) {
if (codewords[codewordsRow] == null) {
continue;
}
Codeword codeword = codewords[codewordsRow];
codeword.setRowNumberAsRowIndicatorColumn();
int rowDifference = codeword.getRowNumber() - barcodeRow;
// TODO improve handling with case where first row indicator doesn't start with 0
if (rowDifference == 0) {
currentRowHeight++;
} else if (rowDifference == 1) {
maxRowHeight = Math.max(maxRowHeight, currentRowHeight);
currentRowHeight = 1;
barcodeRow = codeword.getRowNumber();
} else if (codeword.getRowNumber() >= barcodeMetadata.getRowCount()) {
codewords[codewordsRow] = null;
} else {
barcodeRow = codeword.getRowNumber();
currentRowHeight = 1;
}
}
return (int) (averageRowHeight + 0.5);
}
