C++ exifdata::const_iterator类代码示例

QString exifDataToString(Exiv2::ExifData exifData) {
    if (exifData.empty()) {
        return QString(QObject::tr("No EXIF found"));
    }
    try {
        Exiv2::ExifData::const_iterator end = exifData.end();
        QString tmpExif, final;
        for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) {
            const char* tn = i->typeName();
            /*std::string str = i->key() << " ";
                      << "0x" << std::setw(4) << std::setfill('0') << std::right
                      << std::hex << i->tag() << " "
                      << std::setw(9) << std::setfill(' ') << std::left
                      << (tn ? tn : "Unknown") << " "
                      << std::dec << std::setw(3)
                      << std::setfill(' ') << std::right
                      << i->count() << "  "
                      << std::dec << i->value()
                      << "\n";*/
            tmpExif = "<span style='color:#1cb495;'>" + QString::fromStdString(i->key()).split(".").at(2) + "</span>&emsp;" +
                      //QString::number(i->tag()) + "\t" +
                      //(tn ? tn : "Unknown") + "\t" +
                      //QString::number(i->count()) + "\t" +
                      QString::fromStdString(i->value().toString()) + "<br />";
            final.append(tmpExif);
        }
        return final;
    } catch(Exiv2::Error& e) {

bool NegativeProcessor::getRawExifTag(const char* exifTagName, dng_string* value) {
    Exiv2::ExifData::const_iterator it = m_RawExif.findKey(Exiv2::ExifKey(exifTagName));
    if (it == m_RawExif.end()) return false;

    value->Set_ASCII((it->print(&m_RawExif)).c_str()); value->TrimLeadingBlanks(); value->TrimTrailingBlanks();
    return true;
}

Profile::Ptr Profile::loadFromExiv2Image(const Exiv2::Image* image)
{
    Profile::Ptr ptr;
    cmsHPROFILE hProfile = 0;

    const Exiv2::ExifData& exifData = image->exifData();
    Exiv2::ExifKey key("Exif.Image.InterColorProfile");
    Exiv2::ExifData::const_iterator it = exifData.findKey(key);
    if (it == exifData.end()) {
        LOG("No profile found");
        return ptr;
    }
    int size = it->size();
    LOG("size:" << size);

    QByteArray data;
    data.resize(size);
    it->copy(reinterpret_cast<Exiv2::byte*>(data.data()), Exiv2::invalidByteOrder);
    hProfile = cmsOpenProfileFromMem(data, size);

    if (hProfile) {
        ptr = new Profile(hProfile);
    }
    return ptr;
}

 int RafImage::pixelWidth() const
 {
     Exiv2::ExifData::const_iterator widthIter = exifData_.findKey(Exiv2::ExifKey("Exif.Photo.PixelXDimension"));
     if (widthIter != exifData_.end() && widthIter->count() > 0) {
         return widthIter->toLong();
     }
     return 0;
 }

 int RafImage::pixelHeight() const
 {
     Exiv2::ExifData::const_iterator heightIter = exifData_.findKey(Exiv2::ExifKey("Exif.Photo.PixelYDimension"));
     if (heightIter != exifData_.end() && heightIter->count() > 0) {
         return heightIter->toLong();
     }
     return 0;
 }

 const double getExiv2ValueDouble(Exiv2::ExifData& exifData, Exiv2::ExifData::const_iterator it)
 {
     if(it!=exifData.end() && it->count())
     {
         return it->toFloat();
     }
     return 0;
 };

 const std::string getExiv2ValueString(Exiv2::ExifData& exifData,Exiv2::ExifData::const_iterator it)
 {
     if(it!=exifData.end() && it->count())
     {
         return hugin_utils::StrTrim(it->toString());
     };
     return std::string("");
 };

bool NegativeProcessor::getInterpretedRawExifTag(const char* exifTagName, int32 component, uint32* value) {
    Exiv2::ExifData::const_iterator it = m_RawExif.findKey(Exiv2::ExifKey(exifTagName));
    if (it == m_RawExif.end()) return false;

    std::stringstream interpretedValue; it->write(interpretedValue, &m_RawExif);

    uint32 tmp;
    for (int i = 0; (i <= component) && !interpretedValue.fail(); i++) interpretedValue >> tmp;
    if (interpretedValue.fail()) return false;

    *value = tmp;
    return true;
}

// uses the exiv2 class to readout the exifdata from images
int ExifScout::showExifData(std::string a){
    try {
        Ui_MainWindow::textEdit->clear();
        std::cerr << "ImageFactory::open ";
        Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(a);
        std::cerr << "DONE\n";
        assert(image.get() != 0);

        std::cerr << "image->readMetadata() ";
        image->readMetadata();
        std::cerr << "DONE\n";

        std::cerr << "Exiv2::ExifData& exifData = image->exifData() ";
        Exiv2::ExifData exifData = image->exifData();
        std::cerr << "DONE\n";

	cout << "Number of found exiv2 data: " << exifData.count() << endl;
        if (exifData.empty()) {
            Ui_MainWindow::textEdit->setPlainText("No Exif data found in file");
            return 1;
        }

        Exiv2::ExifData::const_iterator end = exifData.end();
        std::cerr << "Generate the exif-output ";
        QString output;
        for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) {
            std::string tagname = i->tagName();

            if(tagname != std::string("MakerNote") and
               tagname.substr(0,2) != "0x"){
                // Print out the exif-data in the QtextEdit Field
                std::ostringstream oss;
                oss << i->tagName() << ":\n    " << i->value() << "\n";
                output = output+(QString)oss.str().c_str();
            }
        }
        std::cerr << "Done\n";
        Ui_MainWindow::textEdit->setPlainText(output);

        return 0;
    }
    //catch (std::exception& e) {
    //catch (Exiv2::AnyError& e) {
    catch (Exiv2::Error& e) {
        std::cout << "Caught Exiv2 exception '" << e.what() << "'\n";
        return -1;
    }
}

void ThumbView::updateExifInfo(QString imageFullPath)
{
	Exiv2::Image::AutoPtr exifImage;
	QString key;
	QString val;

	try	{
		exifImage = Exiv2::ImageFactory::open(imageFullPath.toStdString());
		exifImage->readMetadata();
	}
	catch (Exiv2::Error &error) {
		return;
	}

	Exiv2::ExifData &exifData = exifImage->exifData();
	if (!exifData.empty()) {
		Exiv2::ExifData::const_iterator end = exifData.end();
		infoView->addTitleEntry("Exif");
		for (Exiv2::ExifData::const_iterator md = exifData.begin(); md != end; ++md) {
			key = QString::fromUtf8(md->tagName().c_str());
			val = QString::fromUtf8(md->print().c_str());
			infoView->addEntry(key, val);
		}
	}

	Exiv2::IptcData &iptcData = exifImage->iptcData();
	if (!iptcData.empty()) {
		Exiv2::IptcData::iterator end = iptcData.end();
		infoView->addTitleEntry("IPTC");
		for (Exiv2::IptcData::iterator md = iptcData.begin(); md != end; ++md) {
			key = QString::fromUtf8(md->tagName().c_str());
			val = QString::fromUtf8(md->print().c_str());
	   		infoView->addEntry(key, val);
		}
	}

	Exiv2::XmpData &xmpData = exifImage->xmpData();
	if (!xmpData.empty()) {
		Exiv2::XmpData::iterator end = xmpData.end();
		infoView->addTitleEntry("XMP");
		for (Exiv2::XmpData::iterator md = xmpData.begin(); md != end; ++md) {
			key = QString::fromUtf8(md->tagName().c_str());
			val = QString::fromUtf8(md->print().c_str());
			infoView->addEntry(key, val);
		}
	}
}

void print(const std::string& file)
{
    Exiv2::ExifData ed;
    int rc = ed.read(file);
    if (rc) {
        std::string error = Exiv2::ExifData::strError(rc, file);
        throw Exiv2::Error(error);
    }

    Exiv2::ExifData::const_iterator end = ed.end();
    for (Exiv2::ExifData::const_iterator i = ed.begin(); i != end; ++i) {
        std::cout << std::setw(45) << std::setfill(' ') << std::left
                  << i->key() << " "
                  << "0x" << std::setw(4) << std::setfill('0') << std::right
                  << std::hex << i->tag() << " " 
                  << std::setw(12) << std::setfill(' ') << std::left
                  << i->ifdName() << " "
                  << std::setw(9) << std::setfill(' ') << std::left
                  << i->typeName() << " "
                  << std::dec << std::setw(3) 
                  << std::setfill(' ') << std::right
                  << i->count() << " "
                  << std::dec << i->value() 
                  << "\n";

    }
}

void print(const std::string& file)
{
    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(file);
    assert(image.get() != 0);
    image->readMetadata();

    Exiv2::ExifData &ed = image->exifData();
    Exiv2::ExifData::const_iterator end = ed.end();
    for (Exiv2::ExifData::const_iterator i = ed.begin(); i != end; ++i) {
        std::cout << std::setw(45) << std::setfill(' ') << std::left
                  << i->key() << " "
                  << "0x" << std::setw(4) << std::setfill('0') << std::right
                  << std::hex << i->tag() << " "
                  << std::setw(12) << std::setfill(' ') << std::left
                  << i->ifdName() << " "
                  << std::setw(9) << std::setfill(' ') << std::left
                  << i->typeName() << " "
                  << std::dec << std::setw(3)
                  << std::setfill(' ') << std::right
                  << i->count() << " "
                  << std::dec << i->value()
                  << "\n";

    }
}

// This is weird because iptc and exif have not been "unified". Once
// they are unified, this DLL should not have to know
// about either... just generic images, keys, values, etc.
//
// buffsize should be the total size of *buff (including space for null)
// Note that if there is more than one entry (for some IPTC datasets) this
// returns the first one found. Currently no way to get the others.
// Returns 0 on success
EXIVSIMPLE_API int ReadMeta(HIMAGE img, const char *key, char *buff, int buffsize)
{
    assert(img && key && buff);
    if (img==0 || key==0 || buff==0 || buffsize==0) return -1;
    ImageWrapper *imgWrap = (ImageWrapper*)img;
    int rc = 2;

    Exiv2::IptcData &iptcData = imgWrap->image->iptcData();
    Exiv2::ExifData &exifData = imgWrap->image->exifData();

    try {
        // First try iptc
        Exiv2::IptcKey iptcKey(key);
        rc = 1;
        Exiv2::IptcData::const_iterator iter = iptcData.findKey(iptcKey);
        if (iter != iptcData.end()) {
            strncpy(buff, iter->value().toString().c_str(), buffsize);
            buff[buffsize-1] = 0;
            rc = 0;
        }
    } 
    catch(const Exiv2::AnyError&) {
    }

    if (rc) {
        // No iptc value, so try exif
        try {
            Exiv2::ExifKey exifKey(key);
            rc = 1;
            Exiv2::ExifData::const_iterator iter = exifData.findKey(exifKey);
            if (iter != exifData.end()) {
                strncpy(buff, iter->value().toString().c_str(), buffsize);
                buff[buffsize-1] = 0;
                rc = 0;
            }
        }
        catch(const Exiv2::AnyError&) {
        }
    }

    return rc;
}

// tries to find a specified exif tag in a specified file
QString ExifScout::getExifData(QString fname, QString etag){
    std::string filename = fname.toAscii().data();
    std::string exiftag = etag.toAscii().data();

    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename);
    assert(image.get() != 0);
    image->readMetadata();
    Exiv2::ExifData exifData = image->exifData();
    if (!exifData.empty()) {
        Exiv2::ExifData::const_iterator end = exifData.end();
        QString output;
        for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) {
            if(i->tagName()==exiftag){
                std::ostringstream oss;
                oss << i->value();
                return (QString)oss.str().c_str();
            }
        }
    }
    return NULL;
}

int main(int argc, char* const argv[])
try {

    if (argc != 2) {
        std::cout << "Usage: " << argv[0] << " file\n";
        return 1;
    }

    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(argv[1]);
    if (image.get() == 0) {
        std::string error(argv[1]);
        error += " : Could not read file or unknown image type";
        throw Exiv2::Error(error);
    }

    // Load existing metadata
    int rc = image->readMetadata();
    if (rc) {
        std::string error = Exiv2::Image::strError(rc, argv[1]);
        throw Exiv2::Error(error);
    }

    Exiv2::ExifData &exifData = image->exifData();
    Exiv2::ExifData::const_iterator end = exifData.end();
    for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) {
        std::cout << std::setw(53) << std::setfill(' ') << std::left
                  << i->key() << " "
                  << "0x" << std::setw(4) << std::setfill('0') << std::right
                  << std::hex << i->tag() << "  " 
                  << std::dec << i->value() 
                  << "\n";
    }

    return rc;
}
catch (Exiv2::Error& e) {
    std::cout << "Caught Exiv2 exception '" << e << "'\n";
    return -1;
}