libadm throws an error if formalLabel is not 0 or 1

[rsjbailey]

An audioTrackFormat representing some custom codec might have user-defined formatLabel and formatDefinition attributes (see 2076-2 page 80).

libadm throws a parsing error if it encounters anything other than formatDefinition=0000 formatLabel=Undefined or formatDefinition=0001 formatLabel=PCM despite other values being valid.

libadm/src/elements/format_descriptor.cpp

Lines 12 to 34 in 3f94a9b

	FormatDescriptor parseFormatLabel(const std::string& label) {
	if (label == "0000") {
	return FormatDefinition::UNDEFINED;
	} else if (label == "0001") {
	return FormatDefinition::PCM;
	} else {
	std::stringstream errorString;
	errorString << "invalid formatLabel: " << label;
	throw std::runtime_error(errorString.str());
	}
	}
	FormatDescriptor parseFormatDefinition(const std::string& definition) {
	if (definition == "Undefined") {
	return FormatDefinition::UNDEFINED;
	} else if (definition == "PCM") {
	return FormatDefinition::PCM;
	} else {
	std::stringstream errorString;
	errorString << "invalid formatDefinition: " << definition;
	throw std::runtime_error(errorString.str());
	}
	}