+void afh_init(void);
+int guess_audio_format(const char *name);
+int compute_afhi(const char *path, char *data, size_t size,
+ int fd, struct afh_info *afhi);
+const char *audio_format_name(int);
+void afh_get_chunk(long unsigned chunk_num, struct afh_info *afhi,
+ void *map, const char **buf, size_t *len);
+void afh_get_header(struct afh_info *afhi, void *map, const char **buf, size_t *len);
+char *make_taginfo(char *title, char *artist, char *album, char *year,
+ char *comment);