AE5_HEADPHONE_GAIN_MAX
uinfo->value.enumerated.items = AE5_HEADPHONE_GAIN_MAX;
if (uinfo->value.enumerated.item >= AE5_HEADPHONE_GAIN_MAX)
uinfo->value.enumerated.item = AE5_HEADPHONE_GAIN_MAX - 1;
unsigned int items = AE5_HEADPHONE_GAIN_MAX;