7 /** \file playlist.c Functions for loading and saving playlists. */
9 /** Structure used for adding entries to a playlist. */
10 struct playlist_info {
11 /** The name of the playlist. */
13 /** The number of entries currently in the playlist. */
16 static struct playlist_info playlist;
19 * Re-insert an audio file into the tree of admissible files.
21 * \param aft_row Determines the audio file.
23 * \return The return value of score_update().
25 int playlist_update_audio_file(struct osl_row *aft_row)
27 /* always re-insert to the top of the tree */
28 return score_update(aft_row, 0);
31 static int add_playlist_entry(char *line, void *private_data)
33 struct osl_row *aft_row;
34 struct playlist_info *pli = private_data;
35 int ret = aft_get_row_of_path(line, &aft_row);
38 PARA_NOTICE_LOG("path not found in audio file table: %s\n",
42 ret = score_add(aft_row, -pli->length);
44 PARA_ERROR_LOG("failed to add %s: %d\n", line, ret);
51 static int load_playlist(struct osl_row *row)
53 struct osl_object obj;
56 ret = osl_get_object(playlists_table, row, BLOBCOL_NAME, &obj);
59 playlist.name = para_strdup(obj.data);
61 ret = osl_open_disk_object(playlists_table, row, BLOBCOL_DEF, &obj);
64 ret = for_each_line_ro(obj.data, obj.size, add_playlist_entry,
66 osl_close_disk_object(&obj);
69 ret = -E_PLAYLIST_EMPTY;
72 PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist.name,
80 /* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */
81 static int playlist_loop(struct osl_row *row, __a_unused void *private_data)
83 int ret = load_playlist(row);
85 if (ret != -E_DUMMY_ROW)
86 PARA_NOTICE_LOG("unable to load playlist, trying next\n");
89 return -E_PLAYLIST_LOADED;
92 static int load_first_available_playlist(void)
94 int ret = osl_rbtree_loop(playlists_table, BLOBCOL_NAME, NULL,
96 if (ret == -E_PLAYLIST_LOADED) /* success */
99 return ret; /* error */
100 PARA_NOTICE_LOG("no valid playlist found\n");
101 return -E_NO_PLAYLIST;
105 * Close the current playlist.
107 * \sa playlist_open().
109 void playlist_close(void)
112 playlist.name = NULL;
116 * Open the given playlist.
118 * \param name The name of the playlist to open.
120 * If name is \p NULL, load the first available playlist. Files which are
121 * listed in the playlist, but not contained in the database are ignored.
122 * This is not considered an error.
124 * \return Positive on success, negative on errors. Possible errors
125 * include: Given playlist not found, -E_NO_PLAYLIST (no playlist defined).
127 int playlist_open(char *name)
129 struct osl_object obj;
134 return load_first_available_playlist();
136 obj.size = strlen(obj.data);
137 ret = osl_get_row(playlists_table, BLOBCOL_NAME, &obj, &row);
139 PARA_NOTICE_LOG("failed to load playlist %s\n", name);
142 return load_playlist(row);