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queue.h

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/* libmpdclient
   (c) 2003-2010 The Music Player Daemon Project
   This project's homepage is: http://www.musicpd.org

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*! \file
 * \brief MPD client library
 *
 * Manipulate the queue (current playlist).
 *
 * Do not include this header directly.  Use mpd/client.h instead.
 */

#ifndef MPD_QUEUE_H
#define MPD_QUEUE_H

#include <mpd/compiler.h>

#include <stdbool.h>

struct mpd_connection;

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Sends the "playlistinfo" command: list all songs in the queue
 * including meta information.
 */
bool
mpd_send_list_queue_meta(struct mpd_connection *connection);

/**
 * Like mpd_send_list_queue_meta(), but specifies a (position) range.
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 * @return true on success, false on error
 */
bool
mpd_send_list_queue_range_meta(struct mpd_connection *connection,
                         unsigned start, unsigned end);

/**
 * Requests information (including tags) about one song in the
 * playlist (command "playlistid").
 *
 * @param connection the connection to MPD
 * @param pos the position of the requested song
 */
bool
mpd_send_get_queue_song_pos(struct mpd_connection *connection, unsigned pos);

/**
 * Shortcut for mpd_send_get_queue_song_pos() and mpd_recv_song().
 *
 * @param connection the connection to MPD
 * @param pos the position of the requested song
 * @return the song at the specified position, or NULL on error
 */
mpd_malloc
struct mpd_song *
mpd_run_get_queue_song_pos(struct mpd_connection *connection, unsigned pos);

/**
 * Requests information (including tags) about one song in the
 * playlist (command "playlistid").
 *
 * @param connection the connection to MPD
 * @param id the id of the requested song
 */
bool
mpd_send_get_queue_song_id(struct mpd_connection *connection, unsigned id);

/**
 * Shortcut for mpd_send_get_queue_song_id() and mpd_recv_song().
 *
 * @param connection the connection to MPD
 * @param id the id of the requested song
 * @return the song at the specified id, or NULL on error
 */
mpd_malloc
struct mpd_song *
mpd_run_get_queue_song_id(struct mpd_connection *connection, unsigned id);

/**
 * Request the queue changes from MPD since the specified version,
 * including tags.  The MPD command is called "plchanges".
 *
 * @param connection the connection to MPD
 * @param version The playlist version you want the diff with.
 * @return true on success, false on error
 */
bool
mpd_send_queue_changes_meta(struct mpd_connection *connection,
                      unsigned version);

/**
 * A more bandwidth efficient version of the
 * mpd_send_queue_changes_meta().  It only returns the position and id
 * of changed songs.  The MPD command is called "plchangesposid".
 *
 * @param connection A valid and connected mpd_connection.
 * @param version The playlist version you want the diff with.
 * @return true on success, false on error
 */
bool
mpd_send_queue_changes_brief(struct mpd_connection *connection,
                       unsigned version);

/**
 * Receives a response element of mpd_send_queue_changes_brief().
 *
 * @param connection A valid and connected mpd_connection.
 * @param position_r reference to the position of the changed song
 * @param id_r reference to the id of the changed song
 * @return true on success, false on error or if there are no more
 * changes in this response
 */
bool
mpd_recv_queue_change_brief(struct mpd_connection *connection,
                      unsigned *position_r, unsigned *id_r);

/**
 * Appends a song to the playlist.
 */
bool
mpd_send_add(struct mpd_connection *connection, const char *file);

/**
 * Shortcut for mpd_send_add() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param uri the URI of the song to be added
 * @return true on success, false on error
 */
bool
mpd_run_add(struct mpd_connection *connection, const char *uri);

/**
 * Appends a song to the playlist, and returns its id.
 */
bool
mpd_send_add_id(struct mpd_connection *connection, const char *file);

/**
 * Inserts a song into the playlist, and returns its id.
 *
 * @param connection the connection to MPD
 * @param uri the URI of the song to be added
 * @param to the desired position of the song
 * @return true on success, false on error
 */
bool
mpd_send_add_id_to(struct mpd_connection *connection, const char *uri,
               unsigned to);

/**
 * Returns the id of the new song in the playlist.  To be called after
 * mpd_send_add_id().
 *
 * @return the new song id, -1 on error or if MPD did not send an id
 */
int
mpd_recv_song_id(struct mpd_connection *connection);

/**
 * Executes the "addid" command and reads the response.
 *
 * @return the new song id, -1 on error or if MPD did not send an id
 */
int
mpd_run_add_id(struct mpd_connection *connection, const char *file);

/**
 * Executes the "addid" command and reads the response.
 *
 * @param connection the connection to MPD
 * @param uri the URI of the song to be added
 * @param to the desired position of the song
 * @return the new song id, -1 on error or if MPD did not send an id
 */
int
mpd_run_add_id_to(struct mpd_connection *connection, const char *uri,
              unsigned to);

/**
 * Deletes a song from the queue.
 *
 * @param connection the connection to MPD
 * @param pos the position of the song to be deleted
 */
bool
mpd_send_delete(struct mpd_connection *connection, unsigned pos);

/**
 * Shortcut for mpd_send_delete() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param pos the position of the song to be deleted
 * @return true on success, false on error
 */
bool
mpd_run_delete(struct mpd_connection *connection, unsigned pos);

/**
 * Deletes songs from the queue.
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 * @return true on success, false on error
 */
bool
mpd_send_delete_range(struct mpd_connection *connection,
                  unsigned start, unsigned end);

/**
 * Shortcut for mpd_send_delete_range() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 * @return true on success, false on error
 */
bool
mpd_run_delete_range(struct mpd_connection *connection,
                  unsigned start, unsigned end);

/**
 * Deletes a song from the queue.
 *
 * @param connection the connection to MPD
 * @param id the id of the song to be deleted
 */
bool
mpd_send_delete_id(struct mpd_connection *connection, unsigned id);

/**
 * Shortcut for mpd_send_delete_id() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param id the id of the song to be deleted
 * @return true on success, false on error
 */
bool
mpd_run_delete_id(struct mpd_connection *connection, unsigned id);

/**
 * Shuffles the queue.
 *
 * @param connection the connection to MPD
 */
bool
mpd_send_shuffle(struct mpd_connection *connection);

/**
 * Shortcut for mpd_send_shuffle() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 */
bool
mpd_run_shuffle(struct mpd_connection *connection);

/**
 * Shuffles a range within the queue.
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 */
bool
mpd_send_shuffle_range(struct mpd_connection *connection, unsigned start, unsigned end);

/**
 * Shortcut for mpd_send_shuffle_range() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 */
bool
mpd_run_shuffle_range(struct mpd_connection *connection,
                  unsigned start, unsigned end);

/**
 * Clear the queue.
 *
 * @param connection the connection to MPD
 */
bool
mpd_send_clear(struct mpd_connection *connection);

/**
 * Shortcut for mpd_send_clear() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 */
bool
mpd_run_clear(struct mpd_connection *connection);

/**
 * Moves a song within the queue.
 *
 * @param connection the connection to MPD
 * @param from the source song position
 * @param to the new position of the song
 */
bool
mpd_send_move(struct mpd_connection *connection, unsigned from, unsigned to);

/**
 * Shortcut for mpd_send_move() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param from the source song position
 * @param to the new position of the song
 */
bool
mpd_run_move(struct mpd_connection *connection, unsigned from, unsigned to);

/**
 * Moves a song within the queue.
 *
 * @param connection the connection to MPD
 * @param from the source song id
 * @param to the new position of the song (not an id!)
 */
bool
mpd_send_move_id(struct mpd_connection *connection, unsigned from, unsigned to);

/**
 * Shortcut for mpd_send_move_id() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param from the source song id
 * @param to the new position of the song (not an id!)
 */
bool
mpd_run_move_id(struct mpd_connection *connection, unsigned from, unsigned to);

/**
 * Moves a range of songs within the queue.
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 * @param to the new position of the song range
 * @return true on success, false on error
 */
bool
mpd_send_move_range(struct mpd_connection *connection,
                unsigned start, unsigned end, unsigned to);

/**
 * Shortcut for mpd_send_move_id() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param start the start position of the range (including)
 * @param end the end position of the range (excluding)
 * @param to the new position of the song range
 * @return true on success, false on error
 */
bool
mpd_run_move_range(struct mpd_connection *connection,
                unsigned start, unsigned end, unsigned to);

/**
 * Swap the position of two songs in the queue.
 *
 * @param connection the connection to MPD
 * @param pos1 the position of one song
 * @param pos2 the position of the other song
 */
bool
mpd_send_swap(struct mpd_connection *connection, unsigned pos1, unsigned pos2);

/**
 * Shortcut for mpd_send_swap() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param pos1 the position of one song
 * @param pos2 the position of the other song
 */
bool
mpd_run_swap(struct mpd_connection *connection, unsigned pos1, unsigned pos2);

/**
 * Swap the position of two songs in the queue.
 *
 * @param connection the connection to MPD
 * @param id1 the id of one song
 * @param id2 the id of the other song
 */
bool
mpd_send_swap_id(struct mpd_connection *connection, unsigned id1, unsigned id2);

/**
 * Shortcut for mpd_send_swap_id() and mpd_response_finish().
 *
 * @param connection the connection to MPD
 * @param id1 the id of one song
 * @param id2 the id of the other song
 */
bool
mpd_run_swap_id(struct mpd_connection *connection, unsigned id1, unsigned id2);

#ifdef __cplusplus
}
#endif

#endif

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