+ return Direction::BTT;
+ }
+
+ boost::throw_exception (ReadError("unknown subtitle direction type"));
+}
+
+
+/** Convert a content kind to a string which can be used in a
+ * <ContentKind> node
+ * @param kind ContentKind
+ * @return string
+ */
+string
+dcp::content_kind_to_string (ContentKind kind)
+{
+ switch (kind) {
+ case ContentKind::FEATURE:
+ return "feature";
+ case ContentKind::SHORT:
+ return "short";
+ case ContentKind::TRAILER:
+ return "trailer";
+ case ContentKind::TEST:
+ return "test";
+ case ContentKind::TRANSITIONAL:
+ return "transitional";
+ case ContentKind::RATING:
+ return "rating";
+ case ContentKind::TEASER:
+ return "teaser";
+ case ContentKind::POLICY:
+ return "policy";
+ case ContentKind::PUBLIC_SERVICE_ANNOUNCEMENT:
+ return "psa";
+ case ContentKind::ADVERTISEMENT:
+ return "advertisement";
+ case ContentKind::EPISODE:
+ return "episode";
+ case ContentKind::PROMO:
+ return "promo";
+ }
+
+ DCP_ASSERT (false);
+}
+
+
+/** Convert a string from a <ContentKind> node to a libdcp ContentKind.
+ * Reasonably tolerant about varying case
+ * @param kind Content kind string
+ * @return libdcp ContentKind
+ */
+dcp::ContentKind
+dcp::content_kind_from_string (string kind)
+{
+ transform (kind.begin(), kind.end(), kind.begin(), ::tolower);
+
+ if (kind == "feature") {
+ return ContentKind::FEATURE;
+ } else if (kind == "short") {
+ return ContentKind::SHORT;
+ } else if (kind == "trailer") {
+ return ContentKind::TRAILER;
+ } else if (kind == "test") {
+ return ContentKind::TEST;
+ } else if (kind == "transitional") {
+ return ContentKind::TRANSITIONAL;
+ } else if (kind == "rating") {
+ return ContentKind::RATING;
+ } else if (kind == "teaser") {
+ return ContentKind::TEASER;
+ } else if (kind == "policy") {
+ return ContentKind::POLICY;
+ } else if (kind == "psa") {
+ return ContentKind::PUBLIC_SERVICE_ANNOUNCEMENT;
+ } else if (kind == "advertisement") {
+ return ContentKind::ADVERTISEMENT;
+ } else if (kind == "episode") {
+ return ContentKind::EPISODE;
+ } else if (kind == "promo") {
+ return ContentKind::PROMO;
+ }
+
+ throw BadContentKindError (kind);
+}
+
+
+string
+dcp::marker_to_string (dcp::Marker m)
+{
+ switch (m) {
+ case Marker::FFOC:
+ return "FFOC";
+ case Marker::LFOC:
+ return "LFOC";
+ case Marker::FFTC:
+ return "FFTC";
+ case Marker::LFTC:
+ return "LFTC";
+ case Marker::FFOI:
+ return "FFOI";
+ case Marker::LFOI:
+ return "LFOI";
+ case Marker::FFEC:
+ return "FFEC";
+ case Marker::LFEC:
+ return "LFEC";
+ case Marker::FFMC:
+ return "FFMC";
+ case Marker::LFMC:
+ return "LFMC";
+ }
+
+ DCP_ASSERT (false);
+}
+
+
+dcp::Marker
+dcp::marker_from_string (string s)
+{
+ if (s == "FFOC") {
+ return Marker::FFOC;
+ } else if (s == "LFOC") {
+ return Marker::LFOC;
+ } else if (s == "FFTC") {
+ return Marker::FFTC;
+ } else if (s == "LFTC") {
+ return Marker::LFTC;
+ } else if (s == "FFOI") {
+ return Marker::FFOI;
+ } else if (s == "LFOI") {
+ return Marker::LFOI;
+ } else if (s == "FFEC") {
+ return Marker::FFEC;
+ } else if (s == "LFEC") {
+ return Marker::LFEC;
+ } else if (s == "FFMC") {
+ return Marker::FFMC;
+ } else if (s == "LFMC") {
+ return Marker::LFMC;
+ }
+
+ DCP_ASSERT (false);
+}
+
+
+Rating::Rating (cxml::ConstNodePtr node)
+ : agency(node->string_child("Agency"))
+ , label(node->string_child("Label"))
+{
+ node->done ();
+}
+
+
+void
+Rating::as_xml (xmlpp::Element* parent) const
+{
+ parent->add_child("Agency")->add_child_text(agency);
+ parent->add_child("Label")->add_child_text(label);
+}
+
+
+bool
+dcp::operator== (Rating const & a, Rating const & b)
+{
+ return a.agency == b.agency && a.label == b.label;
+}
+
+
+ContentVersion::ContentVersion ()
+ : id ("urn:uuid:" + make_uuid())
+{
+
+}
+
+
+ContentVersion::ContentVersion (cxml::ConstNodePtr node)
+ : id(node->string_child("Id"))
+ , label_text(node->string_child("LabelText"))
+{
+
+}
+
+
+ContentVersion::ContentVersion (string label_text_)
+ : id ("urn:uuid:" + make_uuid())
+ , label_text (label_text_)
+{
+
+}
+
+
+void
+ContentVersion::as_xml (xmlpp::Element* parent) const
+{
+ auto cv = parent->add_child("ContentVersion");
+ cv->add_child("Id")->add_child_text(id);
+ cv->add_child("LabelText")->add_child_text(label_text);
+}
+
+
+Luminance::Luminance (cxml::ConstNodePtr node)
+ : _value(raw_convert<float>(node->content()))
+ , _unit(string_to_unit(node->string_attribute("units")))
+{
+
+}
+
+
+Luminance::Luminance (float value, Unit unit)
+ : _unit (unit)
+{
+ set_value (value);
+}
+
+
+void
+Luminance::set_value (float v)
+{
+ if (v < 0) {
+ throw dcp::MiscError (String::compose("Invalid luminance value %1", v));
+ }
+
+ _value = v;
+}
+
+
+void
+Luminance::as_xml (xmlpp::Element* parent, string ns) const
+{
+ auto lum = parent->add_child("Luminance", ns);
+ lum->set_attribute("units", unit_to_string(_unit));
+ lum->add_child_text(raw_convert<string>(_value, 3));
+}
+
+
+string
+Luminance::unit_to_string (Unit u)
+{
+ switch (u) {
+ case Unit::CANDELA_PER_SQUARE_METRE:
+ return "candela-per-square-metre";
+ case Unit::FOOT_LAMBERT:
+ return "foot-lambert";
+ default:
+ DCP_ASSERT (false);
+ }
+
+ return {};
+}
+
+
+Luminance::Unit
+Luminance::string_to_unit (string u)
+{
+ if (u == "candela-per-square-metre") {
+ return Unit::CANDELA_PER_SQUARE_METRE;
+ } else if (u == "foot-lambert") {
+ return Unit::FOOT_LAMBERT;
+ }
+
+ throw XMLError (String::compose("Invalid luminance unit %1", u));
+}
+
+
+bool
+dcp::operator== (Luminance const& a, Luminance const& b)
+{
+ return fabs(a.value() - b.value()) < 0.001 && a.unit() == b.unit();
+}
+
+
+MainSoundConfiguration::MainSoundConfiguration (string s)
+{
+ vector<string> parts;
+ boost::split (parts, s, boost::is_any_of("/"));
+ if (parts.size() != 2) {
+ throw MainSoundConfigurationError (s);
+ }
+
+ if (parts[0] == "51") {
+ _field = MCASoundField::FIVE_POINT_ONE;
+ } else if (parts[0] == "71") {
+ _field = MCASoundField::SEVEN_POINT_ONE;
+ } else {
+ throw MainSoundConfigurationError (s);
+ }
+
+ vector<string> channels;
+ boost::split (channels, parts[1], boost::is_any_of(","));
+
+ if (channels.size() > 16) {
+ throw MainSoundConfigurationError (s);
+ }
+
+ for (auto i: channels) {
+ if (i == "-") {
+ _channels.push_back(optional<Channel>());
+ } else {
+ _channels.push_back(mca_id_to_channel(i));
+ }
+ }
+}
+
+
+MainSoundConfiguration::MainSoundConfiguration (MCASoundField field, int channels)
+ : _field (field)
+{
+ _channels.resize (channels);
+}
+
+
+string
+MainSoundConfiguration::to_string () const
+{
+ string c;
+ if (_field == MCASoundField::FIVE_POINT_ONE) {
+ c = "51/";
+ } else {
+ c = "71/";
+ }
+
+ for (auto i: _channels) {
+ if (!i) {
+ c += "-,";
+ } else {
+ c += channel_to_mca_id(*i, _field) + ",";
+ }
+ }
+
+ if (c.length() > 0) {
+ c = c.substr(0, c.length() - 1);
+ }
+
+ return c;
+}
+
+
+optional<Channel>
+MainSoundConfiguration::mapping (int index) const
+{
+ DCP_ASSERT (static_cast<size_t>(index) < _channels.size());
+ return _channels[index];
+}
+
+
+void
+MainSoundConfiguration::set_mapping (int index, Channel c)
+{
+ DCP_ASSERT (static_cast<size_t>(index) < _channels.size());
+ _channels[index] = c;
+}
+
+
+string
+dcp::status_to_string (Status s)
+{
+ switch (s) {
+ case Status::FINAL:
+ return "final";
+ case Status::TEMP:
+ return "temp";
+ case Status::PRE:
+ return "pre";
+ default:
+ DCP_ASSERT (false);
+ }
+}
+
+
+Status
+dcp::string_to_status (string s)
+{
+ if (s == "final") {
+ return Status::FINAL;
+ } else if (s == "temp") {
+ return Status::TEMP;
+ } else if (s == "pre") {
+ return Status::PRE;
+ }
+
+ DCP_ASSERT (false);
+}
+
+
+Channel
+dcp::mca_id_to_channel (string id)
+{
+ if (id == "L") {
+ return Channel::LEFT;
+ } else if (id == "R") {
+ return Channel::RIGHT;
+ } else if (id == "C") {
+ return Channel::CENTRE;
+ } else if (id == "LFE") {
+ return Channel::LFE;
+ } else if (id == "Ls" || id == "Lss") {
+ return Channel::LS;
+ } else if (id == "Rs" || id == "Rss") {
+ return Channel::RS;
+ } else if (id == "HI") {
+ return Channel::HI;
+ } else if (id == "VIN") {
+ return Channel::VI;
+ } else if (id == "Lrs") {
+ return Channel::BSL;
+ } else if (id == "Rrs") {
+ return Channel::BSR;
+ } else if (id == "DBOX") {
+ return Channel::MOTION_DATA;
+ } else if (id == "FSKSync") {
+ return Channel::SYNC_SIGNAL;
+ } else if (id == "SLVS") {
+ return Channel::SIGN_LANGUAGE;
+ }
+
+ throw UnknownChannelIdError (id);
+}
+
+
+string
+dcp::channel_to_mca_id (Channel c, MCASoundField field)
+{
+ switch (c) {
+ case Channel::LEFT:
+ return "L";
+ case Channel::RIGHT:
+ return "R";
+ case Channel::CENTRE:
+ return "C";
+ case Channel::LFE:
+ return "LFE";
+ case Channel::LS:
+ return field == MCASoundField::FIVE_POINT_ONE ? "Ls" : "Lss";
+ case Channel::RS:
+ return field == MCASoundField::FIVE_POINT_ONE ? "Rs" : "Rss";
+ case Channel::HI:
+ return "HI";
+ case Channel::VI:
+ return "VIN";
+ case Channel::BSL:
+ return "Lrs";
+ case Channel::BSR:
+ return "Rrs";
+ case Channel::MOTION_DATA:
+ return "DBOX";
+ case Channel::SYNC_SIGNAL:
+ return "FSKSync";
+ case Channel::SIGN_LANGUAGE:
+ return "SLVS";
+ default:
+ break;