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authorMax Kellermann <max@duempel.org>2008-11-19 21:16:19 +0100
committerMax Kellermann <max@duempel.org>2008-11-19 21:16:19 +0100
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doc: converted doc/COMMANDS to DocBook
The goal is to have one structured document which is the authoritative protocol specification. The documentation which currently resides in the wiki will be merged.
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- Music Player Daemon - Commands
-
- WARNING
- This document has not been updated to reflect recent changes in
- the MPD protocol. It does not contain all supported commands,
- and some commands may now take additional arguments. However,
- clients conforming to this specification should still be
- compatible with the latest release of MPD. For more up to date
- documentation, please see the protocol reference on the wiki at
- <http://mpd.wikia.com/wiki/Protocol_Reference>.
-
-This document is intended for client developers, not end users.
-
-Format:
--------
-
-If arguments contain spaces, they should be surrounded by double quotation
-marks, ".
-
-command <type arg1> <type arg2> ...
- explanation: w/ arg1 and arg2
-
-All data between the client and server is encoded in UTF-8. (Note,
-that in UTF-8 all standard ansi characters, 0-127, are the same as a standard
-ansi encoding. Also, no ansi character appears in any multi-byte
-characters. So, you can use standard C functions like strlen, and strcpy
-just fine with UTF-8 encoded strings. For example: "OK\n" encoded in UTF-8 is
-simply "OK\n". For more information on UTF=8:
-http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 )
-
-Command Completion:
--------------------
-
-A command returns "OK\n" on completion or "ACK some error\n" on failure.
-These denote the end of command execution.
-
-NOTE:
------
-
-For manipulating playlists and playing, there are two sets of commands. One
-set uses the song id of a song in the playlist, while another set uses the
-playlist position of the song. The commands using song id's should be used
-instead of the commands that manipulate and control playback based on playlist
-position. Using song id's is a safer method when multiple clients are
-interacting with MPD.
-
-Commands:
----------
-
-add <string path>
- add the file _path_ to the playlist (directories add recursively)
- _path_ can also be a single file
- increments playlist version by for each song added
-
-addid <string path> <int position>
- _path_ is always a single file or URL
- _position_ is optional, a negative number means it is relative
- to the currently playing song in the playlist (if there is one)
- adds a song to the playlist (non-recursive) and returns the song id;
- example:
-
- addid "foo.mp3"
- Id: 999
- OK
-
-clear
- clears the current playlist
- increments playlist version by 1
-
-clearerror
- clear the current error message in status
- (this is also accomplished by any command that starts playback)
-
-close
- close the connection with the MPD
-
-crossfade <int seconds>
- sets crossfading between songs
-
-currentsong
- displays the song info of current song (same song that is identified
- in status)
-
-delete <int song>
- delete _song_ from playlist
- increments playlist version by 1
-
-deleteid <int songid>
- delete song with _songid_ from playlist
- increments playlist version by 1
-
-find <string type> <string what>
- finds songs in the db that are exactly _what_
- _type_ should be "album", "artist", or "title"
- _what_ is what to find
-
-kill
- kill MPD
-
-list <string type> <string arg1>
- list all tags of _type_
- _type_ should be "album" or "artist"
- _arg1_ is an optional parameter when type is album, this specifies
- to list albums by a artist, where artist is specified with
- arg1
-
-listall <string path>
- lists all songs and directories in _path_ (recursively)
- _path_ is optional and maybe a directory or path
-
-listallinfo <string path>
- same as listall command, except it also returns metadata info
- in the same format as lsinfo
-
-load <string name>
- loads the playlist _name_.m3u from the playlist directory
- increments playlist version by the number of songs added
-
-lsinfo <string directory>
- list contents of _directory_, from the db. _directory_ is optional
-
- When listing the root directory, this currently returns the
- list of stored playlists. This behavior is deprecated; use
- "listplaylists" instead.
-
-move <int from> <int to>
- move song at _from_ to _to_ in the playlist
- increments playlist version by 1
-
-moveid <int songid> <int to>
- move song with _songid_ to _to_ in the playlist
- increments playlist version by 1
- if _to_ is negative, it is relative to the current song in
- the playlist (if there is one).
-
-next
- plays next song in playlist
-
-pause <bool pause>
- toggle pause/resume playing
- _pause_ is required and should be 0 or 1
- NOTE: use of pause command w/o the _pause_ argument is deprecated
-
-password <string password>
- this is used for authentication with the server.
- _password_ is simply the plaintext password
-
-ping
- does nothing but return "OK"
-
-play <int song>
- begin playing playlist at song number _song_, _song_ is optional
-
-playid <int songid>
- begin playing playlist at song with _songid_, _songid_ is optional
-
-playlist
- displays the current playlist
- NOTE: do not use this, instead use 'playlistinfo'
-
-playlistinfo <int song>
- displays list of songs in the playlist
- _song_ is optional and specifies a single song to display info for
-
-playlistid <int songid>
- displays list of songs in the playlist
- _songid_ is optional and specifies a single song to display info for
-
-plchanges <playlist version>
- displays changed songs currently in the playlist since
- _playlist version_
- NOTE: to detect songs that were deleted at the end of the playlist,
- use playlistlength returned by status command.
-
-plchangesposid <playlist version>
- displays changed songs currently in the playlist since
- _playlist version_
- This function only returns the position and the id of the changed song, not the complete metadata. This is more bandwidth efficient.
- NOTE: to detect songs that were deleted at the end of the playlist,
- use playlistlength returned by status command.
-
-previous
- plays previous song in playlist
-
-random <int state>
- set random state to _state_, _state_ should be 0 or 1
-
-repeat <int state>
- set repeat state to _state_, _state_ should be 0 or 1
-
-listplaylists
- prints a list of the playlist directory
-
- After each playlist name, the server sends its last
- modification time as attribute "Last-Modified" in ISO 8601
- format. To avoid problems due to clock differences between
- clients and the server, clients should not compare this value
- with their local clock.
-
-rm <string name>
- removes the playlist <name>.m3u from the playlist directory
-
-save <string name>
- saves the current playlist to _name_.m3u in the playlist directory
-
-search <string type> <string what>
- searches for any song that contain _what_
- _type_ can be "title","artist","album", or "filename"
- search is not case sensitive
-
-seek <int song> <int time>
- seeks to the position _time_ (in seconds) of entry _song_ in the
- playlist
-
-seekid <int songid> <int time>
- seeks to the position _time_ (in seconds) of song with _songid_
-
-setvol <int vol>
- set volume to _vol_
- _vol_ the range of volume is 0-100
-
-shuffle
- shuffles the current playlist
- increments playlist version by 1
-
-stats
- display stats
- artists: number of artists
- albums: number of albums
- songs: number of songs
- uptime: daemon uptime in seconds
- db_playtime: sum of all song times in db
- db_update: last db update in UNIX time
- playtime: time length of music played
-
-status
- reports current status of player, and volume level.
- volume: (0-100).
- repeat: (0 or 1)
- playlist: (31-bit unsigned integer, the playlist version number)
- playlistlength: (integer, the length of the playlist)
- state: ("play", "stop", or "pause")
- song: (current song stopped on or playing, playlist song number)
- songid: (current song stopped on or playing, playlist songid)
- time: <int elapsed>:<time total> (of current playing/paused song)
- bitrate: <int bitrate> (instantaneous bitrate in kbps)
- xfade: <int seconds> (crossfade in seconds)
- audio: <int sampleRate>:<int bits>:<int channels>
- updatings_db: <int job id>
- error: if there is an error, returns message here
-
-stop
- stop playing
-
-swap <int song1> <int song2>
- swap positions of _song1_ and _song2_
- increments playlist version by 1
-
-swapid <int songid1> <int songid2>
- swap positions of of songs with song id's of _songid1_ and _songid2_
- increments playlist version by 1
-
-update <string path>
- searches mp3 directory for new music and removes old music from the db
- _path_ is an optional argument that maybe a particular directory or
- song/file to update.
- returned:
- updating_db: <int job id>
- where job id, is the job id requested for your update, and is displayed
- in status, while the requested update is happening
- increments playlist version by 1
- NOTE: To update a number of paths/songs at once, use command_list,
- it will be much more faster/efficient. Also, if you use a
- command_list for updating, only one update_db job id will be returned
- per sequence of updates.
-
-volume <int change>
- change volume by amount _change_
- NOTE: volume command is deprecated, use setvol instead
-
-idle
- Waits until there is a noteworthy change in one or more of
- MPD's subsystems. As soon as there is one, it lists all
- changed systems in a line in the format "changed: SUBSYSTEM",
- where SUBSYSTEM is one of the following:
-
- database: the song database has been updated
- stored_playlist: a stored playlist has been modified, renamed,
- created or deleted
- playlist: the current playlist has been modified
- player: the player has been started, stopped or seeked
- mixer: the volume has been changed
- output: an audio output has been enabled or disabled
- options: options like "repeat", "random", "crossfade"
-
- While a client waits for "idle" results, the server disables
- timeouts, allowing a client to wait for events as long as mpd
- runs. The "idle" command can be canceled by sending the
- command "noidle" (no other commands are allowed). MPD will
- then leave "idle" mode and print results immediately; might be
- empty at this time.
-
-
-COMMAND LIST
-------------
-
-To facilitate faster adding of files, etc, you can pass a list of commands all
-at once using a command list. The command list beings with:
-
-command_list_begin
-
-or:
-
-command_list_ok_begin
-
-And ends with:
-
-command_list_end
-
-It does not execute any commands until the list has ended. The return
-value is whatever the return for a list of commands is. On success
-for all commands, OK is returned. If a command fails, no more commands
-are executed and the appropriate ACK error is returned. If
-"command_list_ok_begin is used", "list_OK\n" is returned for each
-successful command executed in the command list.