boost::optional<dcpomatic::DCPTime> content_time_to_dcp (std::shared_ptr<const Content> content, dcpomatic::ContentTime t) const;
boost::optional<dcpomatic::ContentTime> dcp_to_content_time (std::shared_ptr<const Content> content, dcpomatic::DCPTime t) const;
+ /** First parameter is PENDING, DONE or CANCELLED.
+ * Second parameter is the property.
+ * Third parameter is true if these signals are currently likely to be frequent.
+ */
boost::signals2::signal<void (ChangeType, int, bool)> Change;
/** Emitted when a video frame is ready. These emissions happen in the correct order. */