scenic

unsigned int getFeatureValue(dc1394feature_t feature, dc1394camera_t * camera)

{

    unsigned int value;

    dc1394error_t error = dc1394_feature_get_value(camera, feature, &value);

    if (error != DC1394_SUCCESS)

        throw std::runtime_error("libdc1394 error: could not get value");

    return value;

}

/// pass by reference because we're expecting multiple values, alternately could return a vector

std::string getWhiteBalance(dc1394camera_t * camera)

{

    unsigned int valueBU, valueRV;

    dc1394error_t error = dc1394_feature_whitebalance_get_value(camera, &valueBU, &valueRV);

    if (error != DC1394_SUCCESS)

        throw std::runtime_error("libdc1394 error: could not get value");

    std::ostringstream result;

    result << valueBU << "," << valueRV;

    return result.str();

}

void saveSettings(const std::string &filename, dc1394camera_t * camera)

    /// FIXME: find reference on how to safely, idiomatically open and write to a file

    std::ofstream fout;

    try 

    {

        fout.open(filename.c_str());

        fout << "camera=" << std::hex << camera->guid << "\n" << std::dec;

        fout << "brightness=" << getFeatureValue(DC1394_FEATURE_BRIGHTNESS, camera) << "\n";

        fout << "auto-exposure=" << getFeatureValue(DC1394_FEATURE_EXPOSURE, camera) << "\n";

        fout << "sharpness=" << getFeatureValue(DC1394_FEATURE_SHARPNESS, camera) << "\n";

        fout << "whitebalance=" << getWhiteBalance(camera) << "\n";

        fout << "saturation=" << getFeatureValue(DC1394_FEATURE_SATURATION, camera) << "\n";

        fout << "gamma=" << getFeatureValue(DC1394_FEATURE_GAMMA, camera) << "\n";

        fout << "shutter-time=" << getFeatureValue(DC1394_FEATURE_SHUTTER, camera) << "\n";

        fout << "gain=" << getFeatureValue(DC1394_FEATURE_GAIN, camera) << "\n";

        fout.close();

    }

    catch (const std::exception& e)  // catch it here so that we close file

    {

        std::cerr << "error: " << e.what() << "\n";

    }

    fout.close();

            ("camera,c", po::value<string>()->default_value("0"), "guid of camera number to use (0 is first camera on bus)")

        if (vm["camera"].as<string>() != "0") // using non-default camera id

            // find right guid

            bool matchedGUID = false;

            for (unsigned i = 0; i < cameras->num and not matchedGUID; ++i)

                std::stringstream GUIDInHex;

                GUIDInHex << std::hex << cameras->ids[i].guid;

                if (GUIDInHex.str() == vm["camera"].as<string>())

                {

                    camera = dc1394_camera_new_unit(dc1394, cameras->ids[i].guid,

                            cameras->ids[i].unit);

                    matchedGUID = true;

                }

            if (not matchedGUID)

                throw std::runtime_error("could not find camera with guid " + 

                        lexical_cast<string>(vm["camera"].as<string>()));

            camerr = dc1394_feature_get_all(camera, &features);

            if (camerr != DC1394_SUCCESS)

                throw std::runtime_error("libdc1394 error: this should be more verbose");