1 /* Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
15 /** \file playlist.c Functions for loading and saving playlists. */
17 /** Structure used for adding entries to a playlist. */
18 struct playlist_info
{
19 /** The name of the playlist. */
21 /** The number of entries currently in the playlist. */
24 static struct playlist_info current_playlist
;
27 * Re-insert an audio file into the tree of admissible files.
29 * \param aft_row Determines the audio file.
31 * \return The return value of score_update().
33 static int playlist_update_audio_file(const struct osl_row
*aft_row
)
35 /* always re-insert to the top of the tree */
36 return score_update(aft_row
, 0);
39 static int add_playlist_entry(char *path
, void *data
)
41 struct playlist_info
*playlist
= data
;
42 struct osl_row
*aft_row
;
43 int ret
= aft_get_row_of_path(path
, &aft_row
);
46 PARA_NOTICE_LOG("%s: %s\n", path
, para_strerror(-ret
));
49 ret
= score_add(aft_row
, -playlist
->length
);
51 PARA_ERROR_LOG("failed to add %s: %s\n", path
, para_strerror(-ret
));
58 /* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */
59 static int load_playlist(struct osl_row
*row
, void *data
)
61 struct playlist_info
*playlist
= data
;
62 struct osl_object playlist_def
;
66 ret
= pl_get_name_and_def_by_row(row
, &playlist_name
, &playlist_def
);
70 ret
= for_each_line(FELF_READ_ONLY
, playlist_def
.data
,
71 playlist_def
.size
, add_playlist_entry
, playlist
);
72 osl_close_disk_object(&playlist_def
);
75 ret
= -E_PLAYLIST_EMPTY
;
76 if (!playlist
->length
)
78 playlist
->name
= para_strdup(playlist_name
);
79 PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist
->name
,
81 return -E_PLAYLIST_LOADED
;
83 if (ret
!= -E_DUMMY_ROW
)
84 PARA_NOTICE_LOG("unable to load playlist (%s)\n",
89 static int check_playlist_path(char *path
, void *data
)
91 struct para_buffer
*pb
= data
;
92 struct osl_row
*aft_row
;
93 int ret
= aft_get_row_of_path(path
, &aft_row
);
96 para_printf(pb
, "%s: %s\n", path
, para_strerror(-ret
));
97 return 1; /* do not fail the loop on bad paths */
100 static int check_playlist(struct osl_row
*row
, void *data
)
102 struct para_buffer
*pb
= data
;
103 struct osl_object playlist_def
;
105 int ret
= pl_get_name_and_def_by_row(row
, &playlist_name
, &playlist_def
);
107 if (ret
< 0) { /* log error, but continue */
108 para_printf(pb
, "failed to get playlist data: %s\n",
109 para_strerror(-ret
));
112 if (*playlist_name
) { /* skip dummy row */
113 para_printf(pb
, "checking playlist %s...\n", playlist_name
);
114 for_each_line(FELF_READ_ONLY
, playlist_def
.data
,
115 playlist_def
.size
, check_playlist_path
, pb
);
117 osl_close_disk_object(&playlist_def
);
122 * Check the playlist table for inconsistencies.
124 * \param aca This callback ignores ->query.
126 * \return Standard. Invalid paths are reported, but are not considered an
129 int playlist_check_callback(struct afs_callback_arg
*aca
)
131 para_printf(&aca
->pbout
, "checking playlists...\n");
132 return osl(osl_rbtree_loop(playlists_table
, BLOBCOL_ID
, &aca
->pbout
,
137 * Close the current playlist.
139 * \sa \ref playlist_open().
141 void playlist_close(void)
143 if (!current_playlist
.name
)
145 free(current_playlist
.name
);
146 current_playlist
.name
= NULL
;
150 * Open the given playlist.
152 * \param name The name of the playlist to open.
154 * Files which are listed in the playlist, but not contained in the database
155 * are ignored. This is not considered an error.
159 int playlist_open(const char *name
)
161 struct osl_object obj
;
165 obj
.data
= (char *)name
;
166 obj
.size
= strlen(obj
.data
);
167 ret
= osl(osl_get_row(playlists_table
, BLOBCOL_NAME
, &obj
, &row
));
169 PARA_NOTICE_LOG("failed to load playlist %s\n", name
);
173 ret
= load_playlist(row
, ¤t_playlist
);
174 return (ret
== -E_PLAYLIST_LOADED
)? current_playlist
.length
: ret
;
177 static int search_path(char *path
, void *data
)
179 if (strcmp(path
, data
))
181 return -E_PATH_FOUND
;
184 static int handle_audio_file_event(enum afs_events event
, void *data
)
186 int ret
, was_admissible
= 0, is_admissible
;
187 struct osl_object playlist_def
;
189 const struct osl_row
*row
= data
;
191 if (event
== AUDIO_FILE_RENAME
) {
192 ret
= row_belongs_to_score_table(row
, NULL
);
195 was_admissible
= ret
;
197 ret
= get_audio_file_path_of_row(row
, &new_path
);
200 ret
= pl_get_def_by_name(current_playlist
.name
, &playlist_def
);
203 ret
= for_each_line(FELF_READ_ONLY
, playlist_def
.data
,
204 playlist_def
.size
, search_path
, new_path
);
205 osl_close_disk_object(&playlist_def
);
206 is_admissible
= (ret
< 0);
207 if (was_admissible
&& is_admissible
)
209 if (!was_admissible
&& !is_admissible
)
211 if (was_admissible
&& !is_admissible
) {
212 current_playlist
.length
--;
213 return score_delete(row
);
215 /* !was_admissible && is_admissible */
216 current_playlist
.length
++;
217 return score_add(row
, 0); /* play it immediately */
221 * Handle afs events relevant to playlists.
223 * \param event The event type.
225 * \param data Depends on the event type.
229 int playlists_event_handler(enum afs_events event
,
230 __a_unused
struct para_buffer
*pb
, void *data
)
233 struct afsi_change_event_data
*aced
= data
;
235 if (!current_playlist
.name
)
239 return playlist_update_audio_file(aced
->aft_row
);
240 case AUDIO_FILE_RENAME
:
242 return handle_audio_file_event(event
, data
);
243 case AUDIO_FILE_REMOVE
:
244 ret
= row_belongs_to_score_table(data
, NULL
);
249 current_playlist
.length
--;
250 return score_delete(data
);