2 * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see 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_ro(playlist_def.data, playlist_def.size,
71 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);
97 return para_printf(pb, "%s: %s\n", path, para_strerror(-ret));
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);
108 return para_printf(pb, "failed to get playlist data: %s\n",
109 para_strerror(-ret));
110 if (*playlist_name) { /* skip dummy row */
111 ret = para_printf(pb, "checking playlist %s...\n", playlist_name);
114 ret = for_each_line_ro(playlist_def.data, playlist_def.size,
115 check_playlist_path, pb);
117 osl_close_disk_object(&playlist_def);
122 * Check the playlist table for inconsistencies.
124 * \param fd The afs socket.
125 * \param query Unused.
127 * \return The return value of the underlying call to osl_rbtree_loop().
129 void playlist_check_callback(int fd, __a_unused const struct osl_object *query)
131 struct para_buffer pb = {
134 .max_size_handler = pass_buffer_as_shm
136 int ret = para_printf(&pb, "checking playlists...\n");
140 osl_rbtree_loop(playlists_table, BLOBCOL_ID, &pb,
143 pass_buffer_as_shm(pb.buf, pb.offset, &fd);
148 * Close the current playlist.
150 * \sa playlist_open().
152 void playlist_close(void)
154 if (!current_playlist.name)
156 free(current_playlist.name);
157 current_playlist.name = NULL;
161 * Open the given playlist.
163 * \param name The name of the playlist to open.
165 * Files which are listed in the playlist, but not contained in the database
166 * are ignored. This is not considered an error.
170 int playlist_open(char *name)
172 struct osl_object obj;
177 obj.size = strlen(obj.data);
178 ret = osl(osl_get_row(playlists_table, BLOBCOL_NAME, &obj, &row));
180 PARA_NOTICE_LOG("failed to load playlist %s\n", name);
184 ret = load_playlist(row, ¤t_playlist);
185 return (ret == -E_PLAYLIST_LOADED)? current_playlist.length : 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 */
234 * Handle afs events relevant to playlists.
236 * \param event The event type.
238 * \param data Depends on the event type.
242 int playlists_event_handler(enum afs_events event,
243 __a_unused struct para_buffer *pb, void *data)
246 struct afsi_change_event_data *aced = data;
250 return playlist_update_audio_file(aced->aft_row);
251 case AUDIO_FILE_RENAME:
253 return handle_audio_file_event(event, data);
254 case AUDIO_FILE_REMOVE:
255 ret = row_belongs_to_score_table(data, NULL);
260 current_playlist.length--;
261 return score_delete(data);