1 /* libmpdclient
2 * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
3 * This project's homepage is: http://www.musicpd.org
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
20 #ifndef LIBMPDCLIENT_H
21 #define LIBMPDCLIENT_H
23 #include <sys/time.h>
25 #define MPD_BUFFER_MAX_LENGTH 50000
26 #define MPD_WELCOME_MESSAGE "OK MPD "
28 #define MPD_ERROR_TIMEOUT 10 /* timeout trying to talk to mpd */
29 #define MPD_ERROR_SYSTEM 11 /* system error */
30 #define MPD_ERROR_UNKHOST 12 /* unknown host */
31 #define MPD_ERROR_CONNPORT 13 /* problems connecting to port on host */
32 #define MPD_ERROR_NOTMPD 14 /* mpd not running on port at host */
33 #define MPD_ERROR_NORESPONSE 15 /* no response on attempting to connect */
34 #define MPD_ERROR_SENDING 16 /* error sending command */
35 #define MPD_ERROR_CONNCLOSED 17 /* connection closed by mpd */
36 #define MPD_ERROR_ACK 18 /* ACK returned! */
37 #define MPD_ERROR_BUFFEROVERRUN 19 /* Buffer was overrun! */
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
43 /* internal stuff don't touch this struct */
44 typedef struct _mpd_ReturnElement {
45 char * name;
46 char * value;
47 } mpd_ReturnElement;
49 /* mpd_Connection
50 * holds info about connection to mpd
51 * use error, and errorStr to detect errors
52 */
53 typedef struct _mpd_Connection {
54 /* use this to check the version of mpd */
55 int version[3];
56 /* IMPORTANT, you want to get the error messages from here */
57 char errorStr[MPD_BUFFER_MAX_LENGTH+1];
58 /* this will be set to 1 if there is an error, 0 if not */
59 int error;
60 /* DON'T TOUCH any of the rest of this stuff */
61 int sock;
62 char buffer[MPD_BUFFER_MAX_LENGTH+1];
63 int buflen;
64 int bufstart;
65 int doneProcessing;
66 int commandList;
67 mpd_ReturnElement * returnElement;
68 struct timeval timeout;
69 } mpd_Connection;
71 /* mpd_newConnection
72 * use this to open a new connection
73 * you should use mpd_closeConnection, when your done with the connection,
74 * even if an error has occurred
75 * _timeout_ is the connection timeout period in seconds
76 */
77 mpd_Connection * mpd_newConnection(const char * host, int port, float timeout);
79 void mpd_setConnectionTimeout(mpd_Connection * connection, float timeout);
81 /* mpd_closeConnection
82 * use this to close a connection and free'ing subsequent memory
83 */
84 void mpd_closeConnection(mpd_Connection * connection);
86 /* mpd_clearError
87 * clears error
88 */
89 void mpd_clearError(mpd_Connection * connection);
91 /* STATUS STUFF */
93 /* use these with status.state to determine what state the player is in */
94 #define MPD_STATUS_STATE_UNKNOWN 0
95 #define MPD_STATUS_STATE_STOP 1
96 #define MPD_STATUS_STATE_PLAY 2
97 #define MPD_STATUS_STATE_PAUSE 3
99 /* us this with status.volume to determine if mpd has volume support */
100 #define MPD_STATUS_NO_VOLUME -1
102 /* mpd_Status
103 * holds info return from status command
104 */
105 typedef struct mpd_Status {
106 /* 0-100, or MPD_STATUS_NO_VOLUME when there is no volume support */
107 int volume;
108 /* 1 if repeat is on, 0 otherwise */
109 int repeat;
110 /* 1 if random is on, 0 otherwise */
111 int random;
112 /* playlist length */
113 int playlistLength;
114 /* playlist, use this to determine when the playlist has changed */
115 long long playlist;
116 /* use with MPD_STATUS_STATE_* to determine state of player */
117 int state;
118 /* crossfade setting in seconds */
119 int crossfade;
120 /* if in PLAY or PAUSE state, this is the number of the currently
121 * playing song in the playlist, beginning with 0
122 */
123 int song;
124 /* time in seconds that have elapsed in the currently playing/paused
125 * song
126 */
127 int elapsedTime;
128 /* length in seconds of the currently playing/paused song */
129 int totalTime;
130 /* current bit rate in kbs */
131 int bitRate;
132 /* audio sample rate */
133 unsigned int sampleRate;
134 /* audio bits */
135 int bits;
136 /* audio channels */
137 int channels;
138 /* error */
139 char * error;
140 } mpd_Status;
142 /* mpd_getStatus
143 * returns status info, be sure to free it with mpd_freeStatus()
144 */
145 mpd_Status * mpd_getStatus(mpd_Connection * connection);
147 /* mpd_freeStatus
148 * free's status info malloc'd and returned by mpd_getStatus
149 */
150 void mpd_freeStatus(mpd_Status * status);
152 typedef struct _mpd_Stats {
153 int numberOfArtists;
154 int numberOfAlbums;
155 int numberOfSongs;
156 unsigned long uptime;
157 unsigned long dbUpdateTime;
158 unsigned long playTime;
159 unsigned long dbPlayTime;
160 } mpd_Stats;
162 mpd_Stats * mpd_getStats(mpd_Connection * connection);
164 void mpd_freeStats(mpd_Stats * stats);
166 /* SONG STUFF */
168 #define MPD_SONG_NO_TIME -1
170 /* mpd_Song
171 * for storing song info returned by mpd
172 */
173 typedef struct _mpd_Song {
174 /* filename of song */
175 char * file;
176 /* artist, maybe NULL if there is no tag */
177 char * artist;
178 /* title, maybe NULL if there is no tag */
179 char * title;
180 /* album, maybe NULL if there is no tag */
181 char * album;
182 /* track, maybe NULL if there is no tag */
183 char * track;
184 /* length of song in seconds, check that it is not MPD_SONG_NO_TIME */
185 int time;
186 } mpd_Song;
188 /* mpd_newSong
189 * use to allocate memory for a new mpd_Song
190 * file, artist, etc all initialized to NULL
191 * if your going to assign values to file, artist, etc
192 * be sure to malloc or strdup the memory
193 * use mpd_freeSong to free the memory for the mpd_Song, it will also
194 * free memory for file, artist, etc, so don't do it yourself
195 */
196 mpd_Song * mpd_newSong();
198 /* mpd_freeSong
199 * use to free memory allocated by mpd_newSong
200 * also it will free memory pointed to by file, artist, etc, so be careful
201 */
202 void mpd_freeSong(mpd_Song * song);
204 /* mpd_songDup
205 * works like strDup, but for a mpd_Song
206 */
207 mpd_Song * mpd_songDup(mpd_Song * song);
209 /* DIRECTORY STUFF */
211 /* mpd_Directory
212 * used to store info fro directory (right now that just the path)
213 */
214 typedef struct _mpd_Directory {
215 char * path;
216 } mpd_Directory;
218 /* mpd_newDirectory
219 * allocates memory for a new directory
220 * use mpd_freeDirectory to free this memory
221 */
222 mpd_Directory * mpd_newDirectory ();
224 /* mpd_freeDirectory
225 * used to free memory allocated with mpd_newDirectory, and it frees
226 * path of mpd_Directory, so be careful
227 */
228 void mpd_freeDirectory(mpd_Directory * directory);
230 /* mpd_directoryDup
231 * works like strdup, but for mpd_Directory
232 */
233 mpd_Directory * mpd_directoryDup(mpd_Directory * directory);
235 /* PLAYLISTFILE STUFF */
237 /* mpd_PlaylistFile
238 * stores info about playlist file returned by lsinfo
239 */
240 typedef struct _mpd_PlaylistFile {
241 char * path;
242 } mpd_PlaylistFile;
244 /* mpd_newPlaylistFile
245 * allocates memory for new mpd_PlaylistFile, path is set to NULL
246 * free this memory with mpd_freePlaylistFile
247 */
248 mpd_PlaylistFile * mpd_newPlaylistFile();
250 /* mpd_freePlaylist
251 * free memory allocated for freePlaylistFile, will also free
252 * path, so be careful
253 */
254 void mpd_freePlaylistFile(mpd_PlaylistFile * playlist);
256 /* mpd_playlistFileDup
257 * works like strdup, but for mpd_PlaylistFile
258 */
259 mpd_PlaylistFile * mpd_playlistFileDup(mpd_PlaylistFile * playlist);
261 /* INFO ENTITY STUFF */
263 /* the type of entity returned from one of the commands that generates info
264 * use in conjunction with mpd_InfoEntity.type
265 */
266 #define MPD_INFO_ENTITY_TYPE_DIRECTORY 0
267 #define MPD_INFO_ENTITY_TYPE_SONG 1
268 #define MPD_INFO_ENTITY_TYPE_PLAYLISTFILE 2
270 /* mpd_InfoEntity
271 * stores info on stuff returned info commands
272 */
273 typedef struct mpd_InfoEntity {
274 /* the type of entity, use with MPD_INFO_ENTITY_TYPE_* to determine
275 * what this entity is (song, directory, etc...)
276 */
277 int type;
278 /* the actual data you want, mpd_Song, mpd_Directory, etc */
279 union {
280 mpd_Directory * directory;
281 mpd_Song * song;
282 mpd_PlaylistFile * playlistFile;
283 } info;
284 } mpd_InfoEntity;
286 mpd_InfoEntity * mpd_newInfoEntity();
288 void mpd_freeInfoEntity(mpd_InfoEntity * entity);
290 /* INFO COMMANDS AND STUFF */
292 /* use this function to loop over after calling Info/Listall functions */
293 mpd_InfoEntity * mpd_getNextInfoEntity(mpd_Connection * connection);
295 /* songNum of -1, means to display the whole list */
296 void mpd_sendPlaylistInfoCommand(mpd_Connection * connection, int songNum);
298 void mpd_sendListallCommand(mpd_Connection * connection, const char * dir);
300 void mpd_sendListallInfoCommand(mpd_Connection * connection, const char * dir);
302 void mpd_sendLsInfoCommand(mpd_Connection * connection, const char * dir);
304 #define MPD_TABLE_ARTIST 0
305 #define MPD_TABLE_ALBUM 1
306 #define MPD_TABLE_TITLE 2
307 #define MPD_TABLE_FILENAME 3
309 void mpd_sendSearchCommand(mpd_Connection * connection, int table,
310 const char * str);
312 void mpd_sendFindCommand(mpd_Connection * connection, int table,
313 const char * str);
315 /* LIST TAG COMMANDS */
317 /* use this function fetch next artist entry, be sure to free the returned
318 * string. NULL means there are no more. Best used with sendListArtists
319 */
320 char * mpd_getNextArtist(mpd_Connection * connection);
322 char * mpd_getNextAlbum(mpd_Connection * connection);
324 /* list artist or albums by artist, arg1 should be set to the artist if
325 * listing albums by a artist, otherwise NULL for listing all artists or albums
326 */
327 void mpd_sendListCommand(mpd_Connection * connection, int table,
328 const char * arg1);
330 void mpd_sendListAlbumsCommand(mpd_Connection * connection,
331 const char * artist);
333 /* SIMPLE COMMANDS */
335 void mpd_sendAddCommand(mpd_Connection * connection, const char * file);
337 void mpd_sendDeleteCommand(mpd_Connection * connection, int songNum);
339 void mpd_sendSaveCommand(mpd_Connection * connection, const char * name);
341 void mpd_sendLoadCommand(mpd_Connection * connection, const char * name);
343 void mpd_sendRmCommand(mpd_Connection * connection, const char * name);
345 void mpd_sendShuffleCommand(mpd_Connection * connection);
347 void mpd_sendClearCommand(mpd_Connection * connection);
349 /* use this to start playing at the beginning, useful when in random mode */
350 #define MPD_PLAY_AT_BEGINNING -1
352 void mpd_sendPlayCommand(mpd_Connection * connection, int songNum);
354 void mpd_sendStopCommand(mpd_Connection * connection);
356 void mpd_sendPauseCommand(mpd_Connection * connection);
358 void mpd_sendNextCommand(mpd_Connection * connection);
360 void mpd_sendPrevCommand(mpd_Connection * connection);
362 void mpd_sendMoveCommand(mpd_Connection * connection, int from, int to);
364 void mpd_sendSwapCommand(mpd_Connection * connection, int song1, int song2);
366 void mpd_sendSeekCommand(mpd_Connection * connection, int song, int time);
368 void mpd_sendRepeatCommand(mpd_Connection * connection, int repeatMode);
370 void mpd_sendRandomCommand(mpd_Connection * connection, int randomMode);
372 void mpd_sendSetvolCommand(mpd_Connection * connection, int volumeChange);
374 /* WARNING: don't use volume command, its depreacted */
375 void mpd_sendVolumeCommand(mpd_Connection * connection, int volumeChange);
377 void mpd_sendCrossfadeCommand(mpd_Connection * connection, int seconds);
379 void mpd_sendUpdateCommand(mpd_Connection * connection);
381 void mpd_sendPasswordCommand(mpd_Connection * connection, const char * pass);
383 /* after executing a command, when your done with it to get its status
384 * (you want to check connection->error for an error)
385 */
386 void mpd_finishCommand(mpd_Connection * connection);
388 /* command list stuff, use this to do things like add files very quickly */
389 void mpd_sendCommandListBegin(mpd_Connection * connection);
391 void mpd_sendCommandListEnd(mpd_Connection * connection);
393 #ifdef __cplusplus
394 }
395 #endif
397 #endif