C++ AutoPtr::readMetadata方法代码示例

void ExifTransfer::copyMetadata() {
    try {
        dst = Exiv2::ImageFactory::open(BasicIo::AutoPtr(new MemIo(data, dataSize)));
        dst->readMetadata();
    } catch (Exiv2::Error & e) {
        std::cerr << "Exiv2 error: " << e.what() << std::endl;
        return;
    }
    try {
        src = Exiv2::ImageFactory::open(srcFile.toLocal8Bit().constData());
        src->readMetadata();
        copyXMP();
        copyIPTC();
        copyEXIF();
    } catch (Exiv2::Error & e) {
        std::cerr << "Exiv2 error: " << e.what() << std::endl;
        // At least we have to set the SubImage1 file type to Primary Image
        dst->exifData()["Exif.SubImage1.NewSubfileType"] = 0;
    }
    try {
        dst->writeMetadata();
        FileIo fileIo(dstFile.toLocal8Bit().constData());
        fileIo.open("wb");
        fileIo.write(dst->io());
        fileIo.close();
    } catch (Exiv2::Error & e) {
        std::cerr << "Exiv2 error: " << e.what() << std::endl;
    }
}

// *****************************************************************************
// Main
int main(int argc, char* const argv[])
{
try {
    // Handle command line arguments
    Params params;
    if (params.getopt(argc, argv)) {
        params.usage();
        return 1;
    }
    if (params.help_) {
        params.help();
        return 2;
    }

    // Use MemIo to increase test coverage.
    Exiv2::BasicIo::AutoPtr fileIo(new Exiv2::FileIo(params.read_));
    Exiv2::BasicIo::AutoPtr memIo(new Exiv2::MemIo);
    memIo->transfer(*fileIo);

    Exiv2::Image::AutoPtr readImg = Exiv2::ImageFactory::open(memIo);
    assert(readImg.get() != 0);
    readImg->readMetadata();

    Exiv2::Image::AutoPtr writeImg = Exiv2::ImageFactory::open(params.write_);
    assert(writeImg.get() != 0);
    if (params.preserve_) writeImg->readMetadata();
    if (params.iptc_) {
        writeImg->setIptcData(readImg->iptcData());
    }
    if (params.exif_) {
        writeImg->setExifData(readImg->exifData());
    }
    if (params.comment_) {
        writeImg->setComment(readImg->comment());
    }
    if (params.xmp_) {
        writeImg->setXmpData(readImg->xmpData());
    }

    try {
        writeImg->writeMetadata();
    }
    catch (const Exiv2::AnyError&) {
        std::cerr << params.progname() <<
            ": Could not write metadata to (" << params.write_ << ")\n";
        return 8;
    }

    return 0;
}
catch (Exiv2::AnyError& e) {
    std::cerr << "Caught Exiv2 exception '" << e << "'\n";
    return 10;
}
}

int populateMetaExif(std::string file, std::string plate)
{
	try 
	{
		Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(file);
		std::string comment = plate + ' '+ "LOT50"; //Add code to get information about lot
	
		if(!image.get())
		{
			throw Exiv2::Error(1, "Failed to open image");
		}
		
		image->readMetadata();
		Exiv2::ExifData &exifData = image->exifData();
	
		
		exifData["Exif.Photo.UserComment"]= comment;
		//std::cout<< "Writing Exiv User Comment "<< exifData["Exif.Image.ImageDescription"] <<"\n";
		image->writeMetadata();
		
	} catch (Exiv2::AnyError& e) {
		std::cout << "Problem Writing Metadata '" << e << "'\n";
		return -1;
	}
	
	return 0;
}

Exiv2::ExifData getExifFromPath(char* filename) {
    qDebug() << "Trying to read EXIF for" << filename;
    try {
        Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename);
        assert(image.get() != 0);
        image->readMetadata();

        Exiv2::ExifData &exifData = image->exifData();
        if (exifData.empty()) {
            std::string error(filename);
            error += ": No Exif data found in the file";

            //TODO Translate
            //throw Exiv2::Error(1, error);
        }
        return exifData;
    } catch (Exiv2::Error& e) {
        Exiv2::ExifData exifData;
        qCritical() << "Caught Exiv2 exception '" << e.what();
        //TODO Translate
        return exifData;
    }


}

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";

    }
}

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]);
    assert(image.get() != 0);
    image->readMetadata();

    const std::string& xmpPacket = image->xmpPacket();
    if (xmpPacket.empty()) {
        std::string error(argv[1]);
        error += ": No XMP packet found in the file";
        throw Exiv2::Error(1, error);
    }
    std::cout << xmpPacket << "\n";

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

bool ptImageHelper::TransferExif(const QString ASourceFile, const QString ATargetFile)
{
  if (ASourceFile == ATargetFile      ||
      ASourceFile.trimmed().isEmpty() ||
      ATargetFile.trimmed().isEmpty())
    return false;

  try {
    if (Exiv2::ImageFactory::getType(ASourceFile.toLocal8Bit().data()) == Exiv2::ImageType::none)
      return false;

    Exiv2::Image::AutoPtr hSourceImage = Exiv2::ImageFactory::open(ASourceFile.toLocal8Bit().data());

    if (!hSourceImage.get()) return false;

    hSourceImage->readMetadata();

    Exiv2::Image::AutoPtr hTargetImage = Exiv2::ImageFactory::open(ATargetFile.toLocal8Bit().data());

    hTargetImage->clearMetadata();
    hTargetImage->setMetadata(*hSourceImage);
    hTargetImage->writeMetadata();
    return true;
  } catch (Exiv2::AnyError& Error) {
    if (Settings->GetInt("JobMode") == 0) {
      ptMessageBox::warning(0 ,"Exiv2 Error","No exif data written!\nCaught Exiv2 exception '" + QString(Error.what()) + "'\n");
    } else {
      std::cout << "Caught Exiv2 exception '" << Error << "'\n";
    }
  }
  return false;
}

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]);
    assert(image.get() != 0);
    image->readMetadata();

    Exiv2::XmpData xmpData;
    Exiv2::copyExifToXmp(image->exifData(), xmpData);

    Exiv2::ExifData exifData;
    Exiv2::copyXmpToExif(xmpData, exifData);

    image->setXmpData(xmpData);
    image->setExifData(exifData);
    image->writeMetadata();
    
    return 0;
}
catch (Exiv2::AnyError& e) {
    std::cout << "Caught Exiv2 exception '" << e << "'\n";
    return -1;
}

int RemoveGPSExif(const char* File, int NoChangeMtime)
{
	struct stat statbuf;
	struct stat statbuf2;
	struct utimbuf utb;
	if (NoChangeMtime)
		stat(File, &statbuf);

	// Open the file and start reading.
	Exiv2::Image::AutoPtr Image;
	
	try {
		Image = Exiv2::ImageFactory::open(File);
	} catch (Exiv2::Error e) {
		DEBUGLOG("Failed to open file %s.\n", File);
		return 0;
	}
	Image->readMetadata();
	if (Image.get() == NULL)
	{
		// It failed if we got here.
		DEBUGLOG("Failed to read file %s %s.\n",
			 File, Exiv2::strError().c_str());
		return 0;
	}

	Exiv2::ExifData &ExifInfo = Image->exifData();

	if (ExifInfo.count() == 0)
	{
		DEBUGLOG("No EXIF tags in file %s.\n", File);
		return 0;
	}

	EraseGpsTags(ExifInfo);
	
	try {
		Image->writeMetadata();
	} catch (Exiv2::Error e) {
		DEBUGLOG("Failed to write to file %s.\n", File);
		return 0;
	}

	if (NoChangeMtime)
	{
		stat(File, &statbuf2);
		utb.actime = statbuf2.st_atime;
		utb.modtime = statbuf.st_mtime;
		utime(File, &utb);
	}

	return 1;

}

void RawParameters::loadCamXyzFromDng() {
    // Try to load it from the DNG metadata
    try {
        const float d65_white[3] = { 0.950456f, 1.0f, 1.088754f };
        double cc[4][4], xyz[] = { 1,1,1 };
        for (int i = 0; i < 4; ++i) {
            for (int j = 0; j < 4; ++j) {
                cc[j][i] = i == j ? 1.0 : 0.0;
            }
        }
        Exiv2::Image::AutoPtr src = Exiv2::ImageFactory::open(fileName.toLocal8Bit().constData());
        src->readMetadata();
        const Exiv2::ExifData & srcExif = src->exifData();

        auto ccData = srcExif.findKey(Exiv2::ExifKey("Exif.Image.CameraCalibration1"));
        if (ccData == srcExif.end()) {
            ccData = srcExif.findKey(Exiv2::ExifKey("Exif.Image.CameraCalibration2"));
        }
        if (ccData != srcExif.end()) {
            for (int i = 0; i < colors; ++i) {
                for (int j = 0; j < colors; ++j) {
                    cc[i][j] = ccData->toFloat(i*colors + j);
                }
            }
        }

        auto xyzData = srcExif.findKey(Exiv2::ExifKey("Exif.Image.AsShotWhiteXY"));
        if (xyzData != srcExif.end()) {
            xyz[0] = xyzData->toFloat(0);
            xyz[1] = xyzData->toFloat(1);
            xyz[2] = 1.0 - xyz[0] - xyz[1];
            for (int i = 0; i < 3; ++i) {
                xyz[i] /= d65_white[i];
            }
        }

        auto cmData = srcExif.findKey(Exiv2::ExifKey("Exif.Image.ColorMatrix1"));
        if (cmData == srcExif.end()) {
            cmData = srcExif.findKey(Exiv2::ExifKey("Exif.Image.ColorMatrix2"));
        }
        if (cmData != srcExif.end() && cmData->count() == 3*colors) {
            for (int c = 0; c < colors; ++c) {
                for (int i = 0; i < 3; ++i) {
                    camXyz[c][i] = 0.0;
                    for (int j = 0; j < colors; ++j) {
                        camXyz[c][i] += cc[c][j] * cmData->toFloat(j*3 + i) * xyz[i];
                    }
                }
            }
        }
    } catch (Exiv2::Error & e) {
        Log::debug("Could not load camXyz values from metadata: ", e.what());
    }
}

void Frame::save(std::string dir) {
    std::string path = dir + "/" + id;
    imwrite(path, *img);
    Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(path);
    image->readMetadata();
    Exiv2::ExifData &exifData = image->exifData();
    std::stringstream ss;
    ss << std::setprecision(12) << data.lat << " " << data.lon << " " << data.altitude << " " << data.heading << " " << data.time;
    exifData["Exif.Photo.UserComment"] = ss.str();
    image->writeMetadata();
}

char* ReadExifDate(const char* File, int* IncludesGPS)
{
	// Open and read the file.
	Exiv2::Image::AutoPtr Image;

	try {
		Image = Exiv2::ImageFactory::open(File);
	} catch (Exiv2::Error e) {
		DEBUGLOG("Failed to open file %s.\n", File);
		return NULL;
	}
	Image->readMetadata();
	if (Image.get() == NULL)
	{
		DEBUGLOG("Failed to read file %s %s.\n",
			 File, Exiv2::strError().c_str());
		return NULL;
	}

	Exiv2::ExifData &ExifRead = Image->exifData();

	// Read the tag out.
	Exiv2::Exifdatum& Tag = ExifRead["Exif.Photo.DateTimeOriginal"];

	// Check that the tag is not blank.
	std::string Value = Tag.toString();

	if (Value.length() == 0)
	{
		// No date/time stamp.
		// Not good.
		// Just return - above us will handle it.
		return NULL;
	}

	// Copy the tag and return that.
	char* Copy = strdup(Value.c_str());
	
	// Check if we have GPS tags.
	Exiv2::Exifdatum& GPSData = ExifRead["Exif.GPSInfo.GPSLatitude"];

	if (GPSData.count() < 3)
	{
		// No valid GPS data.
		*IncludesGPS = 0;
	} else {
		// Seems to include GPS data...
		*IncludesGPS = 1;
	}

	// Now return, passing a pointer to the date string.
	return Copy; // It's up to the caller to free this.
}

// Reads metadata from given file
Exiv2::ExifData *FlickrDownload::readExifData(QString file){
    try{
        Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(
                    file.toStdString().c_str());
        image->readMetadata();
        Exiv2::ExifData *data = new Exiv2::ExifData();
        *data = image->exifData();
        return data;
    } catch (Exiv2::Error& e) {
        qCritical("[Filechooser] %s", e.what());
        return 0;
    }
}

bool KExiv2::loadFromData(const QByteArray& imgData) const
{
    if (imgData.isEmpty())
        return false;

    try
    {
        Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open((Exiv2::byte*)imgData.data(), imgData.size());

        d->filePath.clear();
        image->readMetadata();

        // Size and mimetype ---------------------------------

        d->pixelSize = QSize(image->pixelWidth(), image->pixelHeight());
        d->mimeType  = QString::fromLatin1(image->mimeType().c_str());

        // Image comments ---------------------------------

        d->imageComments() = image->comment();

        // Exif metadata ----------------------------------

        d->exifMetadata() = image->exifData();

        // Iptc metadata ----------------------------------

        d->iptcMetadata() = image->iptcData();

#ifdef _XMP_SUPPORT_

        // Xmp metadata -----------------------------------

        d->xmpMetadata() = image->xmpData();

#endif // _XMP_SUPPORT_

        return true;
    }
    catch( Exiv2::Error& e )
    {
        d->printExiv2ExceptionError(QString::fromLatin1("Cannot load metadata using Exiv2 "), e);
    }
    catch(...)
    {
        qCCritical(LIBKEXIV2_LOG) << "Default exception from Exiv2";
    }

    return false;
}

NegativeProcessor* NegativeProcessor::createProcessor(AutoPtr<dng_host> &host, const char *filename) {
    // -----------------------------------------------------------------------------------------
    // Open and parse rawfile with libraw...

    AutoPtr<LibRaw> rawProcessor(new LibRaw());

    int ret = rawProcessor->open_file(filename);
    if (ret != LIBRAW_SUCCESS) {
        rawProcessor->recycle();
        std::stringstream error; error << "LibRaw-error while opening rawFile: " << libraw_strerror(ret);
        throw std::runtime_error(error.str());
    }

    ret = rawProcessor->unpack();
    if (ret != LIBRAW_SUCCESS) {
        rawProcessor->recycle();
        std::stringstream error; error << "LibRaw-error while unpacking rawFile: " << libraw_strerror(ret);
        throw std::runtime_error(error.str());
    }

    // -----------------------------------------------------------------------------------------
    // ...and libexiv2

    Exiv2::Image::AutoPtr rawImage;
    try {
        rawImage = Exiv2::ImageFactory::open(filename);
        rawImage->readMetadata();
    } 
    catch (Exiv2::Error& e) {
        std::stringstream error; error << "Exiv2-error while opening/parsing rawFile (code " << e.code() << "): " << e.what();
        throw std::runtime_error(error.str());
    }

    // -----------------------------------------------------------------------------------------
    // Identify and create correct processor class

    if (rawProcessor->imgdata.idata.dng_version != 0) {
        try {return new DNGprocessor(host, rawProcessor.Release(), rawImage);}
        catch (dng_exception &e) {
            std::stringstream error; error << "Cannot parse source DNG-file (code " << e.ErrorCode() << ")";
            throw std::runtime_error(error.str());
        }
    }
    else if (!strcmp(rawProcessor->imgdata.idata.model, "ILCE-7"))
        return new ILCE7processor(host, rawProcessor.Release(), rawImage);
    else if (!strcmp(rawProcessor->imgdata.idata.make, "FUJIFILM"))
        return new FujiProcessor(host, rawProcessor.Release(), rawImage);

    return new VariousVendorProcessor(host, rawProcessor.Release(), rawImage);
}