extern std::string atmos_asset_filename (std::shared_ptr<dcp::AtmosAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
extern float relaxed_string_to_float (std::string);
extern std::string careful_string_filter (std::string);
extern std::pair<int, int> audio_channel_types (std::list<int> mapped, int channels);
extern std::shared_ptr<AudioBuffers> remap (std::shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map);
extern Eyes increment_eyes (Eyes e);
extern std::string atmos_asset_filename (std::shared_ptr<dcp::AtmosAsset> asset, int reel_index, int reel_count, boost::optional<std::string> content_summary);
extern float relaxed_string_to_float (std::string);
extern std::string careful_string_filter (std::string);
extern std::pair<int, int> audio_channel_types (std::list<int> mapped, int channels);
extern std::shared_ptr<AudioBuffers> remap (std::shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map);
extern Eyes increment_eyes (Eyes e);