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 current_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 *path
, void *data
)
33 struct playlist_info
*playlist
= data
;
34 struct osl_row
*aft_row
;
35 int ret
= aft_get_row_of_path(path
, &aft_row
);
38 PARA_NOTICE_LOG("%s: %s\n", path
, PARA_STRERROR(-ret
));
41 ret
= score_add(aft_row
, -playlist
->length
);
43 PARA_ERROR_LOG("failed to add %s: %s\n", path
, PARA_STRERROR(-ret
));
50 /* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */
51 static int load_playlist(struct osl_row
*row
, void *data
)
53 struct playlist_info
*playlist
= data
;
54 struct osl_object playlist_def
;
58 ret
= pl_get_name_and_def_by_row(row
, &playlist_name
, &playlist_def
);
62 ret
= for_each_line_ro(playlist_def
.data
, playlist_def
.size
,
63 add_playlist_entry
, playlist
);
64 osl_close_disk_object(&playlist_def
);
67 ret
= -E_PLAYLIST_EMPTY
;
68 if (!playlist
->length
)
70 playlist
->name
= para_strdup(playlist_name
);
71 PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist
->name
,
73 return -E_PLAYLIST_LOADED
;
75 if (ret
!= -E_DUMMY_ROW
)
76 PARA_NOTICE_LOG("unable to load playlist (%s)\n",
81 static int load_first_available_playlist(struct playlist_info
*playlist
)
83 int ret
= osl_rbtree_loop(playlists_table
, BLOBCOL_NAME
, playlist
,
85 if (ret
== -E_PLAYLIST_LOADED
) /* success */
88 return ret
; /* error */
89 PARA_NOTICE_LOG("no valid playlist found\n");
90 return -E_NO_PLAYLIST
;
93 static int check_playlist_path(char *path
, void *data
)
95 struct para_buffer
*pb
= data
;
96 struct osl_row
*aft_row
;
97 int ret
= aft_get_row_of_path(path
, &aft_row
);
100 para_printf(pb
, "%s: %s\n", path
, PARA_STRERROR(-ret
));
104 static int check_playlist(struct osl_row
*row
, void *data
)
106 struct para_buffer
*pb
= data
;
107 struct osl_object playlist_def
;
109 int ret
= pl_get_name_and_def_by_row(row
, &playlist_name
, &playlist_def
);
112 para_printf(pb
, "failed to get playlist data: %s\n",
113 PARA_STRERROR(-ret
));
116 if (*playlist_name
) { /* skip dummy row */
117 para_printf(pb
, "checking playlist %s...\n", playlist_name
);
118 for_each_line_ro(playlist_def
.data
, playlist_def
.size
,
119 check_playlist_path
, pb
);
121 osl_close_disk_object(&playlist_def
);
126 * Check the playlist table for inconsistencies.
128 * \param query Unused.
129 * \param result Contains messages about inconsistencies.
131 * \return The return value of the underlying call to osl_rbtree_loop().
133 int playlist_check_callback(__a_unused
const struct osl_object
*query
,
134 struct osl_object
*result
)
136 struct para_buffer pb
= {.buf
= NULL
};
138 para_printf(&pb
, "checking playlists...\n");
139 osl_rbtree_loop(playlists_table
, BLOBCOL_ID
, &pb
,
141 result
->data
= pb
.buf
;
142 result
->size
= pb
.size
;
147 * Close the current playlist.
149 * \sa playlist_open().
151 void playlist_close(void)
153 free(current_playlist
.name
);
154 current_playlist
.name
= NULL
;
158 * Open the given playlist.
160 * \param name The name of the playlist to open.
162 * If name is \p NULL, load the first available playlist. Files which are
163 * listed in the playlist, but not contained in the database are ignored.
164 * This is not considered an error.
166 * \return Positive on success, negative on errors. Possible errors
167 * include: Given playlist not found, -E_NO_PLAYLIST (no playlist defined).
169 int playlist_open(char *name
)
171 struct osl_object obj
;
176 return load_first_available_playlist(¤t_playlist
);
178 obj
.size
= strlen(obj
.data
);
179 ret
= osl_get_row(playlists_table
, BLOBCOL_NAME
, &obj
, &row
);
181 PARA_NOTICE_LOG("failed to load playlist %s\n", name
);
184 ret
= load_playlist(row
, ¤t_playlist
);
185 return (ret
== -E_PLAYLIST_LOADED
)? 1 : ret
;
188 static int search_path(char *path
, void *data
)
190 if (strcmp(path
, data
))
192 return -E_PATH_FOUND
;
195 static int handle_audio_file_event(enum afs_events event
, void *data
)
197 int ret
, was_admissible
= 0, is_admissible
;
198 struct osl_object playlist_def
;
200 const struct osl_row
*row
= data
;
202 if (!current_playlist
.name
)
204 if (event
== AUDIO_FILE_RENAME
) {
205 ret
= row_belongs_to_score_table(row
, NULL
);
208 was_admissible
= ret
;
210 ret
= get_audio_file_path_of_row(row
, &new_path
);
213 ret
= pl_get_def_by_name(current_playlist
.name
, &playlist_def
);
216 ret
= for_each_line_ro(playlist_def
.data
, playlist_def
.size
,
217 search_path
, new_path
);
218 osl_close_disk_object(&playlist_def
);
219 is_admissible
= (ret
< 0);
220 if (was_admissible
&& is_admissible
)
222 if (!was_admissible
&& !is_admissible
)
224 if (was_admissible
&& !is_admissible
) {
225 current_playlist
.length
--;
226 return score_delete(row
);
228 /* !was_admissible && is_admissible */
229 current_playlist
.length
++;
230 return score_add(row
, 0); /* play it immediately */
233 int playlists_event_handler(enum afs_events event
, struct para_buffer
*pb
,
239 case AUDIO_FILE_RENAME
:
241 return handle_audio_file_event(event
, data
);
242 case AUDIO_FILE_REMOVE
:
243 ret
= row_belongs_to_score_table(data
, NULL
);
248 current_playlist
.length
--;
249 return score_delete(data
);