extern std::pair<int, int> audio_channel_types (std::list<int> mapped, int channels);
extern boost::shared_ptr<AudioBuffers> remap (boost::shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map);
extern Eyes increment_eyes (Eyes e);
+extern void checked_fread (void* ptr, size_t size, FILE* stream, boost::filesystem::path path);
+extern void checked_fwrite (void const * ptr, size_t size, FILE* stream, boost::filesystem::path path);
+#ifdef DCPOMATIC_VARIANT_SWAROOP
+extern boost::shared_ptr<dcp::CertificateChain> read_swaroop_chain (boost::filesystem::path path);
+extern void write_swaroop_chain (boost::shared_ptr<const dcp::CertificateChain> chain, boost::filesystem::path output);
+#endif
#endif