2 * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
14 /** \file playlist.c Functions for loading and saving playlists. */
16 /** Structure used for adding entries to a playlist. */
17 struct playlist_info {
18 /** The name of the playlist. */
20 /** The number of entries currently in the playlist. */
23 static struct playlist_info current_playlist;
26 * Re-insert an audio file into the tree of admissible files.
28 * \param aft_row Determines the audio file.
30 * \return The return value of score_update().
32 static int playlist_update_audio_file(const struct osl_row *aft_row)
34 /* always re-insert to the top of the tree */
35 return score_update(aft_row, 0);
38 static int add_playlist_entry(char *path, void *data)
40 struct playlist_info *playlist = data;
41 struct osl_row *aft_row;
42 int ret = aft_get_row_of_path(path, &aft_row);
45 PARA_NOTICE_LOG("%s: %s\n", path, para_strerror(-ret));
48 ret = score_add(aft_row, -playlist->length);
50 PARA_ERROR_LOG("failed to add %s: %s\n", path, para_strerror(-ret));
57 /* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */
58 static int load_playlist(struct osl_row *row, void *data)
60 struct playlist_info *playlist = data;
61 struct osl_object playlist_def;
65 ret = pl_get_name_and_def_by_row(row, &playlist_name, &playlist_def);
69 ret = for_each_line_ro(playlist_def.data, playlist_def.size,
70 add_playlist_entry, playlist);
71 osl_close_disk_object(&playlist_def);
74 ret = -E_PLAYLIST_EMPTY;
75 if (!playlist->length)
77 playlist->name = para_strdup(playlist_name);
78 PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist->name,
80 return -E_PLAYLIST_LOADED;
82 if (ret != -E_DUMMY_ROW)
83 PARA_NOTICE_LOG("unable to load playlist (%s)\n",
88 static int check_playlist_path(char *path, void *data)
90 struct para_buffer *pb = data;
91 struct osl_row *aft_row;
92 int ret = aft_get_row_of_path(path, &aft_row);
96 return para_printf(pb, "%s: %s\n", path, para_strerror(-ret));
99 static int check_playlist(struct osl_row *row, void *data)
101 struct para_buffer *pb = data;
102 struct osl_object playlist_def;
104 int ret = pl_get_name_and_def_by_row(row, &playlist_name, &playlist_def);
107 return para_printf(pb, "failed to get playlist data: %s\n",
108 para_strerror(-ret));
109 if (*playlist_name) { /* skip dummy row */
110 ret = para_printf(pb, "checking playlist %s...\n", playlist_name);
113 ret = for_each_line_ro(playlist_def.data, playlist_def.size,
114 check_playlist_path, pb);
116 osl_close_disk_object(&playlist_def);
121 * Check the playlist table for inconsistencies.
123 * \param fd The afs socket.
124 * \param query Unused.
126 * \return The return value of the underlying call to osl_rbtree_loop().
128 void playlist_check_callback(int fd, __a_unused const struct osl_object *query)
130 struct para_buffer pb = {
133 .max_size_handler = pass_buffer_as_shm
135 int ret = para_printf(&pb, "checking playlists...\n");
139 osl_rbtree_loop(playlists_table, BLOBCOL_ID, &pb,
142 pass_buffer_as_shm(pb.buf, pb.offset, &fd);
147 * Close the current playlist.
149 * \sa playlist_open().
151 void playlist_close(void)
153 if (!current_playlist.name)
155 free(current_playlist.name);
156 current_playlist.name = NULL;
160 * Open the given playlist.
162 * \param name The name of the playlist to open.
164 * Files which are listed in the playlist, but not contained in the database
165 * are ignored. This is not considered an error.
169 int playlist_open(char *name)
171 struct osl_object obj;
176 obj.size = strlen(obj.data);
177 ret = osl_get_row(playlists_table, BLOBCOL_NAME, &obj, &row);
179 PARA_NOTICE_LOG("failed to load playlist %s\n", name);
183 ret = load_playlist(row, ¤t_playlist);
184 return (ret == -E_PLAYLIST_LOADED)? current_playlist.length : ret;
187 static int search_path(char *path, void *data)
189 if (strcmp(path, data))
191 return -E_PATH_FOUND;
194 static int handle_audio_file_event(enum afs_events event, void *data)
196 int ret, was_admissible = 0, is_admissible;
197 struct osl_object playlist_def;
199 const struct osl_row *row = data;
201 if (!current_playlist.name)
203 if (event == AUDIO_FILE_RENAME) {
204 ret = row_belongs_to_score_table(row, NULL);
207 was_admissible = ret;
209 ret = get_audio_file_path_of_row(row, &new_path);
212 ret = pl_get_def_by_name(current_playlist.name, &playlist_def);
215 ret = for_each_line_ro(playlist_def.data, playlist_def.size,
216 search_path, new_path);
217 osl_close_disk_object(&playlist_def);
218 is_admissible = (ret < 0);
219 if (was_admissible && is_admissible)
221 if (!was_admissible && !is_admissible)
223 if (was_admissible && !is_admissible) {
224 current_playlist.length--;
225 return score_delete(row);
227 /* !was_admissible && is_admissible */
228 current_playlist.length++;
229 return score_add(row, 0); /* play it immediately */
233 * Handle afs events relevant to playlists.
235 * \param event The event type.
237 * \param data Depends on the event type.
241 int playlists_event_handler(enum afs_events event,
242 __a_unused struct para_buffer *pb, void *data)
245 struct afsi_change_event_data *aced = data;
249 return playlist_update_audio_file(aced->aft_row);
250 case AUDIO_FILE_RENAME:
252 return handle_audio_file_event(event, data);
253 case AUDIO_FILE_REMOVE:
254 ret = row_belongs_to_score_table(data, NULL);
259 current_playlist.length--;
260 return score_delete(data);