_AddParameter
status_t _AddParameter(const driver_parameter& parameter,
fBrightness = _AddParameter(group, &subgroup, index,
fContrast = _AddParameter(group, &subgroup, index + 1,
fHue = _AddParameter(group, &subgroup, index + 2,
fSaturation = _AddParameter(group, &subgroup, index + 4,
fSharpness = _AddParameter(group, &subgroup, index + 5,
fGamma = _AddParameter(group, &subgroup, index + 6,
fWBTemp = _AddParameter(group, &subgroup, index + 7,
fWBComponent = _AddParameter(group, &subgroup, index + 9,
fGain = _AddParameter(group, &subgroup, index + 12, USB_VIDEO_PU_GAIN_CONTROL,
float _AddParameter(BParameterGroup* group,
status_t status = _AddParameter(parameter, *settingsTemplate, message);
status = _AddParameter(parameter, *parentValueTemplate, subMessage);