/** The maximum number of audio channels that we can cope with */
#define MAX_AUDIO_CHANNELS 6
-class Scaler;
-class Film;
+class Job;
extern std::string seconds_to_hms (int);
extern std::string seconds_to_approximate_hms (int);
extern void dcpomatic_setup_gettext_i18n (std::string);
extern std::vector<std::string> split_at_spaces_considering_quotes (std::string);
extern std::string md5_digest (boost::filesystem::path);
-extern std::string md5_digest_directory (boost::filesystem::path);
+extern std::string md5_digest_directory (boost::filesystem::path, boost::shared_ptr<Job>);
extern std::string md5_digest (void const *, int);
extern void ensure_ui_thread ();
extern std::string audio_channel_name (int);
+extern bool valid_image_file (boost::filesystem::path);
#ifdef DCPOMATIC_WINDOWS
extern boost::filesystem::path mo_path ();
#endif