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