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508 lines
15 KiB
C
508 lines
15 KiB
C
/* libmpdclient
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(c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
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This project's homepage is: http://www.musicpd.org
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Music Player Daemon nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef LIBMPDCLIENT_H
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#define LIBMPDCLIENT_H
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#include <sys/time.h>
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#define MPD_BUFFER_MAX_LENGTH 50000
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#define MPD_WELCOME_MESSAGE "OK MPD "
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#define MPD_ERROR_TIMEOUT 10 /* timeout trying to talk to mpd */
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#define MPD_ERROR_SYSTEM 11 /* system error */
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#define MPD_ERROR_UNKHOST 12 /* unknown host */
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#define MPD_ERROR_CONNPORT 13 /* problems connecting to port on host */
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#define MPD_ERROR_NOTMPD 14 /* mpd not running on port at host */
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#define MPD_ERROR_NORESPONSE 15 /* no response on attempting to connect */
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#define MPD_ERROR_SENDING 16 /* error sending command */
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#define MPD_ERROR_CONNCLOSED 17 /* connection closed by mpd */
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#define MPD_ERROR_ACK 18 /* ACK returned! */
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#define MPD_ERROR_BUFFEROVERRUN 19 /* Buffer was overrun! */
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#define MPD_ACK_ERROR_UNK -1
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#define MPD_ERROR_AT_UNK -1
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#define MPD_ACK_ERROR_NOT_LIST 1
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#define MPD_ACK_ERROR_ARG 2
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#define MPD_ACK_ERROR_PASSWORD 3
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#define MPD_ACK_ERROR_PERMISSION 4
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#define MPD_ACK_ERROR_UNKNOWN_CMD 5
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#define MPD_ACK_ERROR_NO_EXIST 50
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#define MPD_ACK_ERROR_PLAYLIST_MAX 51
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#define MPD_ACK_ERROR_SYSTEM 52
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#define MPD_ACK_ERROR_PLAYLIST_LOAD 53
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#define MPD_ACK_ERROR_UPDATE_ALREADY 54
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#define MPD_ACK_ERROR_PLAYER_SYNC 55
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#define MPD_ACK_ERROR_EXIST 56
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* internal stuff don't touch this struct */
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typedef struct _mpd_ReturnElement {
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char *name;
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char *value;
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} mpd_ReturnElement;
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/* mpd_Connection
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* holds info about connection to mpd
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* use error, and errorStr to detect errors
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*/
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typedef struct _mpd_Connection {
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/* use this to check the version of mpd */
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int version[3];
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/* IMPORTANT, you want to get the error messages from here */
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char errorStr[MPD_BUFFER_MAX_LENGTH + 1];
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int errorCode;
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int errorAt;
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/* this will be set to MPD_ERROR_* if there is an error, 0 if not */
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int error;
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/* DON'T TOUCH any of the rest of this stuff */
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int sock;
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char buffer[MPD_BUFFER_MAX_LENGTH + 1];
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int buflen;
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int bufstart;
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int doneProcessing;
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int listOks;
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int doneListOk;
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int commandList;
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mpd_ReturnElement *returnElement;
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struct timeval timeout;
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} mpd_Connection;
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/* mpd_newConnection
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* use this to open a new connection
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* you should use mpd_closeConnection, when your done with the connection,
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* even if an error has occurred
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* _timeout_ is the connection timeout period in seconds
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*/
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mpd_Connection *mpd_newConnection(const char *host, int port,
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float timeout);
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void mpd_setConnectionTimeout(mpd_Connection * connection,
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float timeout);
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/* mpd_closeConnection
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* use this to close a connection and free'ing subsequent memory
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*/
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void mpd_closeConnection(mpd_Connection * connection);
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/* mpd_clearError
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* clears error
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*/
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void mpd_clearError(mpd_Connection * connection);
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/* STATUS STUFF */
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/* use these with status.state to determine what state the player is in */
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#define MPD_STATUS_STATE_UNKNOWN 0
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#define MPD_STATUS_STATE_STOP 1
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#define MPD_STATUS_STATE_PLAY 2
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#define MPD_STATUS_STATE_PAUSE 3
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/* us this with status.volume to determine if mpd has volume support */
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#define MPD_STATUS_NO_VOLUME -1
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/* mpd_Status
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* holds info return from status command
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*/
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typedef struct mpd_Status {
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/* 0-100, or MPD_STATUS_NO_VOLUME when there is no volume support */
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int volume;
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/* 1 if repeat is on, 0 otherwise */
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int repeat;
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/* 1 if random is on, 0 otherwise */
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int random;
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/* playlist length */
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int playlistLength;
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/* playlist, use this to determine when the playlist has changed */
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long long playlist;
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/* use with MPD_STATUS_STATE_* to determine state of player */
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int state;
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/* crossfade setting in seconds */
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int crossfade;
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/* if a song is currently selected (always the case when state is
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* PLAY or PAUSE), this is the position of the currently
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* playing song in the playlist, beginning with 0
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*/
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int song;
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/* Song ID of the currently selected song */
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int songid;
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/* time in seconds that have elapsed in the currently playing/paused
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* song
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*/
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int elapsedTime;
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/* length in seconds of the currently playing/paused song */
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int totalTime;
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/* current bit rate in kbs */
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int bitRate;
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/* audio sample rate */
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unsigned int sampleRate;
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/* audio bits */
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int bits;
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/* audio channels */
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int channels;
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/* 1 if mpd is updating, 0 otherwise */
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int updatingDb;
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/* error */
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char *error;
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} mpd_Status;
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void mpd_sendStatusCommand(mpd_Connection * connection);
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/* mpd_getStatus
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* returns status info, be sure to free it with mpd_freeStatus()
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* call this after mpd_sendStatusCommand()
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*/
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mpd_Status *mpd_getStatus(mpd_Connection * connection);
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/* mpd_freeStatus
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* free's status info malloc'd and returned by mpd_getStatus
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*/
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void mpd_freeStatus(mpd_Status * status);
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typedef struct _mpd_Stats {
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int numberOfArtists;
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int numberOfAlbums;
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int numberOfSongs;
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unsigned long uptime;
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unsigned long dbUpdateTime;
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unsigned long playTime;
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unsigned long dbPlayTime;
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} mpd_Stats;
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void mpd_sendStatsCommand(mpd_Connection * connection);
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mpd_Stats *mpd_getStats(mpd_Connection * connection);
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void mpd_freeStats(mpd_Stats * stats);
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/* SONG STUFF */
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#define MPD_SONG_NO_TIME -1
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#define MPD_SONG_NO_NUM -1
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#define MPD_SONG_NO_ID -1
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/* mpd_Song
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* for storing song info returned by mpd
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*/
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typedef struct _mpd_Song {
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/* filename of song */
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char *file;
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/* artist, maybe NULL if there is no tag */
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char *artist;
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/* title, maybe NULL if there is no tag */
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char *title;
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/* album, maybe NULL if there is no tag */
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char *album;
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/* track, maybe NULL if there is no tag */
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char *track;
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/* name, maybe NULL if there is no tag; it's the name of the current
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* song, f.e. the icyName of the stream */
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char *name;
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/* length of song in seconds, check that it is not MPD_SONG_NO_TIME */
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int time;
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/* if plchanges/playlistinfo/playlistid used, is the position of the
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* song in the playlist */
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int pos;
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/* song id for a song in the playlist */
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int id;
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} mpd_Song;
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/* mpd_newSong
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* use to allocate memory for a new mpd_Song
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* file, artist, etc all initialized to NULL
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* if your going to assign values to file, artist, etc
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* be sure to malloc or strdup the memory
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* use mpd_freeSong to free the memory for the mpd_Song, it will also
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* free memory for file, artist, etc, so don't do it yourself
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*/
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mpd_Song *mpd_newSong();
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/* mpd_freeSong
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* use to free memory allocated by mpd_newSong
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* also it will free memory pointed to by file, artist, etc, so be careful
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*/
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void mpd_freeSong(mpd_Song * song);
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/* mpd_songDup
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* works like strDup, but for a mpd_Song
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*/
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mpd_Song *mpd_songDup(mpd_Song * song);
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/* DIRECTORY STUFF */
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/* mpd_Directory
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* used to store info fro directory (right now that just the path)
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*/
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typedef struct _mpd_Directory {
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char *path;
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} mpd_Directory;
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/* mpd_newDirectory
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* allocates memory for a new directory
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* use mpd_freeDirectory to free this memory
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*/
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mpd_Directory *mpd_newDirectory();
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/* mpd_freeDirectory
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* used to free memory allocated with mpd_newDirectory, and it frees
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* path of mpd_Directory, so be careful
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*/
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void mpd_freeDirectory(mpd_Directory * directory);
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/* mpd_directoryDup
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* works like strdup, but for mpd_Directory
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*/
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mpd_Directory *mpd_directoryDup(mpd_Directory * directory);
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/* PLAYLISTFILE STUFF */
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/* mpd_PlaylistFile
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* stores info about playlist file returned by lsinfo
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*/
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typedef struct _mpd_PlaylistFile {
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char *path;
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} mpd_PlaylistFile;
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/* mpd_newPlaylistFile
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* allocates memory for new mpd_PlaylistFile, path is set to NULL
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* free this memory with mpd_freePlaylistFile
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*/
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mpd_PlaylistFile *mpd_newPlaylistFile();
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/* mpd_freePlaylist
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* free memory allocated for freePlaylistFile, will also free
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* path, so be careful
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*/
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void mpd_freePlaylistFile(mpd_PlaylistFile * playlist);
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/* mpd_playlistFileDup
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* works like strdup, but for mpd_PlaylistFile
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*/
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mpd_PlaylistFile *mpd_playlistFileDup(mpd_PlaylistFile * playlist);
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/* INFO ENTITY STUFF */
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/* the type of entity returned from one of the commands that generates info
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* use in conjunction with mpd_InfoEntity.type
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*/
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#define MPD_INFO_ENTITY_TYPE_DIRECTORY 0
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#define MPD_INFO_ENTITY_TYPE_SONG 1
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#define MPD_INFO_ENTITY_TYPE_PLAYLISTFILE 2
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/* mpd_InfoEntity
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* stores info on stuff returned info commands
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*/
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typedef struct mpd_InfoEntity {
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/* the type of entity, use with MPD_INFO_ENTITY_TYPE_* to determine
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* what this entity is (song, directory, etc...)
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*/
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int type;
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/* the actual data you want, mpd_Song, mpd_Directory, etc */
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union {
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mpd_Directory *directory;
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mpd_Song *song;
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mpd_PlaylistFile *playlistFile;
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} info;
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} mpd_InfoEntity;
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mpd_InfoEntity *mpd_newInfoEntity();
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void mpd_freeInfoEntity(mpd_InfoEntity * entity);
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/* INFO COMMANDS AND STUFF */
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/* use this function to loop over after calling Info/Listall functions */
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mpd_InfoEntity *mpd_getNextInfoEntity(mpd_Connection * connection);
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/* fetches the currently seeletect song (the song referenced by status->song
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* and status->songid*/
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void mpd_sendCurrentSongCommand(mpd_Connection * connection);
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/* songNum of -1, means to display the whole list */
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void mpd_sendPlaylistInfoCommand(mpd_Connection * connection,
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int songNum);
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/* use this to get the changes in the playlist since version _playlist_ */
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void mpd_sendPlChangesCommand(mpd_Connection * connection,
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long long playlist);
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/* recursivel fetches all songs/dir/playlists in "dir* (no metadata is
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* returned) */
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void mpd_sendListallCommand(mpd_Connection * connection,
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const char *dir);
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/* same as sendListallCommand, but also metadata is returned */
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void mpd_sendListallInfoCommand(mpd_Connection * connection,
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const char *dir);
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/* non-recursive version of ListallInfo */
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void mpd_sendLsInfoCommand(mpd_Connection * connection,
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const char *dir);
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#define MPD_TABLE_ARTIST 0
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#define MPD_TABLE_ALBUM 1
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#define MPD_TABLE_TITLE 2
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#define MPD_TABLE_FILENAME 3
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void mpd_sendSearchCommand(mpd_Connection * connection, int table,
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const char *str);
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void mpd_sendFindCommand(mpd_Connection * connection, int table,
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const char *str);
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/* LIST TAG COMMANDS */
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/* use this function fetch next artist entry, be sure to free the returned
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* string. NULL means there are no more. Best used with sendListArtists
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*/
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char *mpd_getNextArtist(mpd_Connection * connection);
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char *mpd_getNextAlbum(mpd_Connection * connection);
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/* list artist or albums by artist, arg1 should be set to the artist if
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* listing albums by a artist, otherwise NULL for listing all artists or albums
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*/
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void mpd_sendListCommand(mpd_Connection * connection, int table,
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const char *arg1);
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/* SIMPLE COMMANDS */
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void mpd_sendAddCommand(mpd_Connection * connection,
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const char *file);
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void mpd_sendDeleteCommand(mpd_Connection * connection,
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int songNum);
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void mpd_sendDeleteIdCommand(mpd_Connection * connection,
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int songNum);
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void mpd_sendSaveCommand(mpd_Connection * connection,
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const char *name);
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void mpd_sendLoadCommand(mpd_Connection * connection,
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const char *name);
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void mpd_sendRmCommand(mpd_Connection * connection,
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const char *name);
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void mpd_sendShuffleCommand(mpd_Connection * connection);
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void mpd_sendClearCommand(mpd_Connection * connection);
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/* use this to start playing at the beginning, useful when in random mode */
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#define MPD_PLAY_AT_BEGINNING -1
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void mpd_sendPlayCommand(mpd_Connection * connection, int songNum);
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void mpd_sendPlayIdCommand(mpd_Connection * connection,
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int songNum);
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void mpd_sendStopCommand(mpd_Connection * connection);
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void mpd_sendPauseCommand(mpd_Connection * connection,
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int pauseMode);
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void mpd_sendNextCommand(mpd_Connection * connection);
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void mpd_sendPrevCommand(mpd_Connection * connection);
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void mpd_sendMoveCommand(mpd_Connection * connection, int from,
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int to);
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void mpd_sendMoveIdCommand(mpd_Connection * connection, int from,
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int to);
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void mpd_sendSwapCommand(mpd_Connection * connection, int song1,
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int song2);
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void mpd_sendSwapIdCommand(mpd_Connection * connection, int song1,
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int song2);
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void mpd_sendSeekCommand(mpd_Connection * connection, int song,
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int time);
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void mpd_sendSeekIdCommand(mpd_Connection * connection, int song,
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int time);
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void mpd_sendRepeatCommand(mpd_Connection * connection,
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int repeatMode);
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void mpd_sendRandomCommand(mpd_Connection * connection,
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int randomMode);
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void mpd_sendSetvolCommand(mpd_Connection * connection,
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int volumeChange);
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/* WARNING: don't use volume command, its depreacted */
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void mpd_sendVolumeCommand(mpd_Connection * connection,
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int volumeChange);
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void mpd_sendCrossfadeCommand(mpd_Connection * connection,
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int seconds);
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void mpd_sendUpdateCommand(mpd_Connection * connection,
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char *path);
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/* returns the update job id, call this after a update command*/
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int mpd_getUpdateId(mpd_Connection * connection);
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void mpd_sendPasswordCommand(mpd_Connection * connection,
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const char *pass);
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/* after executing a command, when your done with it to get its status
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* (you want to check connection->error for an error)
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*/
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void mpd_finishCommand(mpd_Connection * connection);
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/* command list stuff, use this to do things like add files very quickly */
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void mpd_sendCommandListBegin(mpd_Connection * connection);
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void mpd_sendCommandListOkBegin(mpd_Connection * connection);
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void mpd_sendCommandListEnd(mpd_Connection * connection);
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/* advance to the next listOk
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* returns 0 if advanced to the next list_OK,
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* returns -1 if it advanced to an OK or ACK */
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int mpd_nextListOkCommand(mpd_Connection * connection);
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#ifdef __cplusplus
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}
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#endif
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#endif
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