afh_common.c: Add missing source code documentation.

Document afh_get_chunk() and make_taginfo().

diff --git a/afh_common.c b/afh_common.c
index 47104500e23417850ef2d164e1c98a68eac74632..bec99bf4d29b6fb8b75d66e29a627eb4f5a002a3 100644 (file)
--- a/afh_common.c
+++ b/afh_common.c
@@ -91,7 +91,6 @@ void afh_init(void)
        }
 }
 
-
 /**
  * Guess the audio format judging from filename.
  *
@@ -122,11 +121,29 @@ int guess_audio_format(const char *name)
        return -E_AUDIO_FORMAT;
 }
 
+/**
+ * Pretty-print the given meta-info.
+ *
+ * \param title The title of the audio file.
+ * \param artist The artist.
+ * \param album The name of the album.
+ * \param year Year of release.
+ * \param comment Further comments.
+ *
+ * This function is called by each audio format handler to produce the tag info
+ * status items. Usually, the audio format handlers read this info from the
+ * audio file (id3 tags, vorbis comments, ...).
+ *
+ * It is OK to pass \p NULL pointers for any argument in which case a suitable
+ * string is inserted which indicates that this information is not available.
+ *
+ * \return The status item string. It must be freed by the caller.
+ */
 char *make_taginfo(char *title, char *artist, char *album, char *year,
                char *comment)
 {
        return make_message("%s: %s, by %s\n" /* taginfo1 */
-               "%s: A: %s, Y: %s, C: %s\n", /* taginfo 2*/
+               "%s: A: %s, Y: %s, C: %s\n", /* taginfo2 */
                status_item_list[SI_TAGINFO1],
                (title && *title)? title : "(title tag not set)",
                (artist && *artist)? artist : "(artist tag not set)",
@@ -196,7 +213,18 @@ const char *audio_format_name(int i)
        return i >= 0?  afl[i].name : "(none)";
 }
 
-
+/**
+ * Get one chunk of audio data.
+ *
+ * \param chunk_num The number of the chunk to get.
+ * \param afhi Describes the audio file.
+ * \param map The memory mapped audio file.
+ * \param buf Result pointer.
+ * \param len The length of the chunk in bytes.
+ *
+ * Upon return, \a buf will point so memory inside \a map. The returned buffer
+ * must therefore not be freed by the caller.
+ */
 void afh_get_chunk(long unsigned chunk_num, struct afh_info *afhi,
                void *map, const char **buf, size_t *len)
 {