IDS-GV-51FxFA-C aravissrc Element property: features

Device Support
1

We are using multiple aravissrc elements as inmput for out Gstreamer pipeline containing multiple models run using Deepstream SDK.
The cameras used are IDS-GV-51FxFA-C cameras with the attached features.

IDS-GV-51FxFA-C-4108842253_features.txt (94.7 KB)

I want to control the Whitebalance color gain values represented as features in lines 701-707 of the features.txt:

    Enumeration : 'GainSelector'
          * Gain
        EnumEntry   : 'DigitalBlue'
        EnumEntry   : 'DigitalGreen'
        EnumEntry   : 'DigitalRed'
        EnumEntry   : 'DigitalAll'
        EnumEntry   : 'AnalogAll'

My question:
How can i set these values over the feature property in C++ using g_lib.
My current code looks like this, and it does not work, since the feature is an EnumEntry and cant be accessed directly.

const std::string& AravisSrcWrapper::build_aravis_features(const ConfigData::CameraConfig& camera_config) {
    std::ostringstream features;

    features << "BrightnessAutoTarget=" << camera_config.auto_brightness_target << " "
             << "BrightnessAutoPercentile=" << camera_config.auto_brightness_percentile << " "
             << "BalanceWhiteAuto=" << (camera_config.auto_white_balance ? "Once" : "Off") << " "
             << "PixelFormat="
             << "BayerRG8"
             << " "
             << "AcquisitionFrameRate=" << camera_config.fps << " "
             << "DigitalRed=" << camera_config.gain_red << " "
             << "DigitalGreen=" << camera_config.gain_green << " "
             << "DigitalBlue=" << camera_config.gain_blue;

    m_features_string = features.str();
    return m_features_string;
}

const Config& AravisSrcWrapper::configure_aravissrc_element(const Config& new_config) {
    assert(new_config.data().camera_configs.find(m_name) != new_config.data().camera_configs.end());
    ConfigData::CameraConfig camera_config = new_config.data().camera_configs.at(m_name);

    const std::string& features_string = build_aravis_features(camera_config);

    g_object_set(G_OBJECT(mp_aravissrc_element), "exposure", static_cast<float>(camera_config.exposure), "exposure-auto",
                 (camera_config.auto_exposure ? "Once" : "Off"), "gain", static_cast<float>(camera_config.analog_gain), "gain-auto",
                 (camera_config.auto_gain ? "Once" : "Off"), "offset-x", camera_config.x_offset, "offset-y",
                 camera_config.y_offset, "features", features_string.c_str(), NULL);

    return mp_config;
}

Is there any special format the feature string has to be in or is setting such entries not supported yet?

2

I followed the flow used by the library provided by ids. First set the value of the GainSelector to a valid EnumEntry and then set the Gain Feature, the feature string should look something like this
“GainSelector=‘DigitalRed’ Gain=2.43 GainSelector=‘DigitalGreen’ Gain=1.0 GainSelector=‘DigitalBlue’ Gain=2.14”

I just dont know how to read the applied values directly in the gstaravis.c get_property_function there is a way to receive the features but the features are not updated, at least i dont know when they are updated, because after calling the g_object_get function for features, the returned string only contains an exact copy of what i have set using g_object_set. This is especially problematic for auto-features, where the applied color gains for example cannot be retrieved.