func (t DRCType) Convert() (string, bool) {
	switch t {
	case DRCOff:
		return "off", false
	case DRCLow:
		return "low", false
	case DRCMedium:
		return "medium", false
	case DRCHigh:
		return "high", false
	case DRCNone:
		fallthrough
	default:
		return "", true
	}
}
Convert takes the type and returns the string representation of that value.
Returns true as well if it is the default value.
package piCamera
type DRCType int
const (
	DRCNone DRCType = iota
	DRCOff
	DRCLow
	DRCMedium
	DRCHigh
)