void QQrDecoder::decodeImage(QImage originalImage)
{
MultiFormatReader decoder;
image.setImage(originalImage);
Ref<Result> res;
try{
Ref<LuminanceSource> imageRef(new CameraImageWrapper(image));
GlobalHistogramBinarizer* binz = new GlobalHistogramBinarizer(imageRef);
Ref<Binarizer> bz (binz);
BinaryBitmap* bb = new BinaryBitmap(bz);
Ref<BinaryBitmap> ref(bb);
res = decoder.decode(ref);
QString string = QString(res->getText()->getText().c_str());
QMessageBox::information((QWidget*)ui.centralwidget, QString("Decoding result") ,string);
}
catch(zxing::Exception& e)
{
// QMessageBox::information((QWidget*)ui.centralwidget, QString("Decoding result"), QString("Error"));
}
}
/*
* viewfinder_callback
*
* This callback is invoked when an image frame from the camera viewfinder becomes available.
* The frame is analyzed to determine if a barcode can be matched.
* Frames come in NV12 format which makes code analysis very fast.
*/
void viewfinder_callback(camera_handle_t handle,camera_buffer_t* buf,void* arg) {
camera_frame_nv12_t* data = (camera_frame_nv12_t*)(&(buf->framedesc));
uint8_t* buff = buf->framebuf;
int stride = data->stride;
int width = data->width;
int height = data->height;
try {
Ref<LuminanceSource> source(new GreyscaleLuminanceSource((unsigned char *)buff, stride, height, 0,0,width,height));
Ref<Binarizer> binarizer(new HybridBinarizer(source));
Ref<BinaryBitmap> bitmap(new BinaryBitmap(binarizer));
Ref<Result> result;
// setup the code reader
MultiFormatReader *reader = new MultiFormatReader();
DecodeHints *hints = new DecodeHints();
hints->addFormat(BarcodeFormat_QR_CODE);
hints->addFormat(BarcodeFormat_EAN_8);
hints->addFormat(BarcodeFormat_EAN_13);
hints->addFormat(BarcodeFormat_UPC_A);
hints->addFormat(BarcodeFormat_UPC_E);
hints->addFormat(BarcodeFormat_DATA_MATRIX);
hints->addFormat(BarcodeFormat_CODE_128);
hints->addFormat(BarcodeFormat_CODE_39);
hints->addFormat(BarcodeFormat_ITF);
hints->addFormat(BarcodeFormat_AZTEC);
// attempt to decode and retrieve a valid QR code from the image bitmap
result = reader->decode(bitmap, *hints);
std::string newBarcodeData = result->getText()->getText().data();
Json::FastWriter writer;
Json::Value root;
root["value"] = newBarcodeData;
std::string event = "community.barcodescanner.codefound.native";
// notify caller that a valid QR code has been decoded
if ( eventDispatcher != NULL){
eventDispatcher->NotifyEvent(event + " " + writer.write(root));
}
#ifdef DEBUG
fprintf(stderr, "This is the detected Barcode : %s\n", newBarcodeData.c_str());
#endif
}
catch (const std::exception& ex)
{
#ifdef DEBUG
fprintf( stderr, "error occured : \%s \n", ex.what());
#endif
}
}
