Ref<Result> OneDReader::decode(Ref<BinaryBitmap> image, DecodeHints hints) {
try {
return doDecode(image, hints);
} catch (NotFoundException const& nfe) {
// std::cerr << "trying harder" << std::endl;
bool tryHarder = hints.getTryHarder();
if (tryHarder && image->isRotateSupported()) {
// std::cerr << "v rotate" << std::endl;
Ref<BinaryBitmap> rotatedImage(image->rotateCounterClockwise());
// std::cerr << "^ rotate" << std::endl;
Ref<Result> result = doDecode(rotatedImage, hints);
// Doesn't have java metadata stuff
ArrayRef< Ref<ResultPoint> >& points (result->getResultPoints());
if (points && !points->empty()) {
int height = rotatedImage->getHeight();
for (int i = 0; i < points->size(); i++) {
points[i].reset(new OneDResultPoint(height - points[i]->getY() - 1, points[i]->getX()));
}
}
// std::cerr << "tried harder" << std::endl;
return result;
} else {
// std::cerr << "tried harder nfe" << std::endl;
throw nfe;
}
}
}
void MultiFormatReader::setHints(DecodeHints hints) {
hints_ = hints;
readers_.clear();
bool tryHarder = hints.getTryHarder();
bool addOneDReader = hints.containsFormat(BarcodeFormat::UPC_E) ||
hints.containsFormat(BarcodeFormat::UPC_A) ||
hints.containsFormat(BarcodeFormat::UPC_E) ||
hints.containsFormat(BarcodeFormat::EAN_13) ||
hints.containsFormat(BarcodeFormat::EAN_8) ||
hints.containsFormat(BarcodeFormat::CODABAR) ||
hints.containsFormat(BarcodeFormat::CODE_39) ||
hints.containsFormat(BarcodeFormat::CODE_93) ||
hints.containsFormat(BarcodeFormat::CODE_128) ||
hints.containsFormat(BarcodeFormat::ITF) ||
hints.containsFormat(BarcodeFormat::RSS_14) ||
hints.containsFormat(BarcodeFormat::RSS_EXPANDED);
if (addOneDReader && !tryHarder) {
readers_.push_back(Ref<Reader>(new zxing::oned::MultiFormatOneDReader(hints)));
}
if (hints.containsFormat(BarcodeFormat::QR_CODE)) {
readers_.push_back(Ref<Reader>(new zxing::qrcode::QRCodeReader()));
}
if (hints.containsFormat(BarcodeFormat::DATA_MATRIX)) {
readers_.push_back(Ref<Reader>(new zxing::datamatrix::DataMatrixReader()));
}
if (hints.containsFormat(BarcodeFormat::AZTEC)) {
readers_.push_back(Ref<Reader>(new zxing::aztec::AztecReader()));
}
if (hints.containsFormat(BarcodeFormat::PDF_417)) {
readers_.push_back(Ref<Reader>(new zxing::pdf417::PDF417Reader()));
}
/*
if (formats.contains(BarcodeFormat.PDF_417)) {
readers.add(new PDF417Reader());
}
if (formats.contains(BarcodeFormat.MAXICODE)) {
readers.add(new MaxiCodeReader());
}
*/
if (addOneDReader && tryHarder) {
readers_.push_back(Ref<Reader>(new zxing::oned::MultiFormatOneDReader(hints)));
}
if (readers_.size() == 0) {
if (!tryHarder) {
readers_.push_back(Ref<Reader>(new zxing::oned::MultiFormatOneDReader(hints)));
}
readers_.push_back(Ref<Reader>(new zxing::qrcode::QRCodeReader()));
readers_.push_back(Ref<Reader>(new zxing::datamatrix::DataMatrixReader()));
readers_.push_back(Ref<Reader>(new zxing::aztec::AztecReader()));
readers_.push_back(Ref<Reader>(new zxing::pdf417::PDF417Reader()));
// readers.add(new PDF417Reader());
// readers.add(new MaxiCodeReader());
if (tryHarder) {
readers_.push_back(Ref<Reader>(new zxing::oned::MultiFormatOneDReader(hints)));
}
}
}
Ref<Result> OneDReader::doDecode(Ref<BinaryBitmap> image, DecodeHints hints) {
int width = image->getWidth();
int height = image->getHeight();
Ref<BitArray> row(new BitArray(width));
int middle = height >> 1;
bool tryHarder = hints.getTryHarder();
int rowStep = std::max(1, height >> (tryHarder ? 8 : 5));
using namespace std;
// cerr << "rS " << rowStep << " " << height << " " << tryHarder << endl;
int maxLines;
if (tryHarder) {
maxLines = height; // Look at the whole image, not just the center
} else {
maxLines = 15; // 15 rows spaced 1/32 apart is roughly the middle half of the image
}
for (int x = 0; x < maxLines; x++) {
// Scanning from the middle out. Determine which row we're looking at next:
int rowStepsAboveOrBelow = (x + 1) >> 1;
bool isAbove = (x & 0x01) == 0; // i.e. is x even?
int rowNumber = middle + rowStep * (isAbove ? rowStepsAboveOrBelow : -rowStepsAboveOrBelow);
if (false) {
std::cerr << "rN "
<< rowNumber << " "
<< height << " "
<< middle << " "
<< rowStep << " "
<< isAbove << " "
<< rowStepsAboveOrBelow
<< std::endl;
}
if (rowNumber < 0 || rowNumber >= height) {
// Oops, if we run off the top or bottom, stop
break;
}
// Estimate black point for this row and load it:
try {
row = image->getBlackRow(rowNumber, row);
} catch (NotFoundException const& ignored) {
(void)ignored;
continue;
}
// While we have the image data in a BitArray, it's fairly cheap to reverse it in place to
// handle decoding upside down barcodes.
for (int attempt = 0; attempt < 2; attempt++) {
if (attempt == 1) {
row->reverse(); // reverse the row and continue
}
// Java hints stuff missing
try {
// Look for a barcode
// std::cerr << "rn " << rowNumber << " " << typeid(*this).name() << std::endl;
Ref<Result> result = decodeRow(rowNumber, row);
// We found our barcode
if (attempt == 1) {
// But it was upside down, so note that
// result.putMetadata(ResultMetadataType.ORIENTATION, new Integer(180));
// And remember to flip the result points horizontally.
ArrayRef< Ref<ResultPoint> > points(result->getResultPoints());
if (points) {
points[0] = Ref<ResultPoint>(new OneDResultPoint(width - points[0]->getX() - 1,
points[0]->getY()));
points[1] = Ref<ResultPoint>(new OneDResultPoint(width - points[1]->getX() - 1,
points[1]->getY()));
}
}
return result;
} catch (ReaderException const& re) {
(void)re;
continue;
}
}
}
throw NotFoundException();
}
Ref<FinderPatternInfo> FinderPatternFinder::find(DecodeHints const &hints) {
bool tryHarder = hints.getTryHarder();
size_t maxI = image_->getHeight();
size_t maxJ = image_->getWidth();
// We are looking for black/white/black/white/black modules in
// 1:1:3:1:1 ratio; this tracks the number of such modules seen so far
// As this is used often, we use an integer array instead of vector
int stateCount[5];
bool done = false;
// Let's assume that the maximum version QR Code we support takes up 1/4
// the height of the image, and then account for the center being 3
// modules in size. This gives the smallest number of pixels the center
// could be, so skip this often. When trying harder, look for all
// QR versions regardless of how dense they are.
int iSkip = (3 * maxI) / (4 * MAX_MODULES);
if (iSkip < MIN_SKIP || tryHarder) {
iSkip = MIN_SKIP;
}
// This is slightly faster than using the Ref. Efficiency is important here
BitMatrix &matrix = *image_;
for (size_t i = iSkip - 1; i < maxI && !done; i += iSkip) {
// Get a row of black/white values
stateCount[0] = 0;
stateCount[1] = 0;
stateCount[2] = 0;
stateCount[3] = 0;
stateCount[4] = 0;
int currentState = 0;
for (size_t j = 0; j < maxJ; j++) {
if (matrix.get(j, i)) {
// Black pixel
if ((currentState & 1) == 1) { // Counting white pixels
currentState++;
}
stateCount[currentState]++;
} else { // White pixel
if ((currentState & 1) == 0) { // Counting black pixels
if (currentState == 4) { // A winner?
if (foundPatternCross(stateCount)) { // Yes
bool confirmed = handlePossibleCenter(stateCount, i, j);
if (confirmed) {
// Start examining every other line. Checking each line turned out to be too
// expensive and didn't improve performance.
iSkip = 2;
if (hasSkipped_) {
done = haveMultiplyConfirmedCenters();
} else {
int rowSkip = findRowSkip();
if (rowSkip > stateCount[2]) {
// Skip rows between row of lower confirmed center
// and top of presumed third confirmed center
// but back up a bit to get a full chance of detecting
// it, entire width of center of finder pattern
// Skip by rowSkip, but back off by stateCount[2] (size
// of last center of pattern we saw) to be conservative,
// and also back off by iSkip which is about to be
// re-added
i += rowSkip - stateCount[2] - iSkip;
j = maxJ - 1;
}
}
} else {
stateCount[0] = stateCount[2];
stateCount[1] = stateCount[3];
stateCount[2] = stateCount[4];
stateCount[3] = 1;
stateCount[4] = 0;
currentState = 3;
continue;
}
// Clear state to start looking again
currentState = 0;
stateCount[0] = 0;
stateCount[1] = 0;
stateCount[2] = 0;
stateCount[3] = 0;
stateCount[4] = 0;
} else { // No, shift counts back by two
stateCount[0] = stateCount[2];
stateCount[1] = stateCount[3];
stateCount[2] = stateCount[4];
stateCount[3] = 1;
stateCount[4] = 0;
currentState = 3;
}
} else {
stateCount[++currentState]++;
}
} else { // Counting white pixels
stateCount[currentState]++;
}
}
}
if (foundPatternCross(stateCount)) {
bool confirmed = handlePossibleCenter(stateCount, i, maxJ);
if (confirmed) {
iSkip = stateCount[0];
if (hasSkipped_) {
// Found a third one
done = haveMultiplyConfirmedCenters();
}
}
}
}
vector<Ref<FinderPattern> > patternInfo = selectBestPatterns();
patternInfo = orderBestPatterns(patternInfo);
Ref<FinderPatternInfo> result(new FinderPatternInfo(patternInfo));
return result;
}
vector<Ref<FinderPatternInfo> > MultiFinderPatternFinder::findMulti(DecodeHints const& hints){
bool tryHarder = hints.getTryHarder();
Ref<BitMatrix> image = image_; // Protected member
int maxI = image->getHeight();
int maxJ = image->getWidth();
// We are looking for black/white/black/white/black modules in
// 1:1:3:1:1 ratio; this tracks the number of such modules seen so far
// Let's assume that the maximum version QR Code we support takes up 1/4 the height of the
// image, and then account for the center being 3 modules in size. This gives the smallest
// number of pixels the center could be, so skip this often. When trying harder, look for all
// QR versions regardless of how dense they are.
int iSkip = (int) (maxI / (MAX_MODULES * 4.0f) * 3);
if (iSkip < MIN_SKIP || tryHarder) {
iSkip = MIN_SKIP;
}
int stateCount[5];
for (int i = iSkip - 1; i < maxI; i += iSkip) {
// Get a row of black/white values
stateCount[0] = 0;
stateCount[1] = 0;
stateCount[2] = 0;
stateCount[3] = 0;
stateCount[4] = 0;
int currentState = 0;
for (int j = 0; j < maxJ; j++) {
if (image->get(j, i)) {
// Black pixel
if ((currentState & 1) == 1) { // Counting white pixels
currentState++;
}
stateCount[currentState]++;
} else { // White pixel
if ((currentState & 1) == 0) { // Counting black pixels
if (currentState == 4) { // A winner?
if (foundPatternCross(stateCount) && handlePossibleCenter(stateCount, i, j)) { // Yes
// Clear state to start looking again
currentState = 0;
stateCount[0] = 0;
stateCount[1] = 0;
stateCount[2] = 0;
stateCount[3] = 0;
stateCount[4] = 0;
} else { // No, shift counts back by two
stateCount[0] = stateCount[2];
stateCount[1] = stateCount[3];
stateCount[2] = stateCount[4];
stateCount[3] = 1;
stateCount[4] = 0;
currentState = 3;
}
} else {
stateCount[++currentState]++;
}
} else { // Counting white pixels
stateCount[currentState]++;
}
}
} // for j=...
if (foundPatternCross(stateCount)) {
handlePossibleCenter(stateCount, i, maxJ);
} // end if foundPatternCross
} // for i=iSkip-1 ...
vector<vector<Ref<FinderPattern> > > patternInfo = selectBestPatterns();
vector<Ref<FinderPatternInfo> > result;
for (unsigned int i = 0; i < patternInfo.size(); i++) {
vector<Ref<FinderPattern> > pattern = patternInfo[i];
pattern = FinderPatternFinder::orderBestPatterns(pattern);
result.push_back(Ref<FinderPatternInfo>(new FinderPatternInfo(pattern)));
}
return result;
}
