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- /*****************************************************************************
- * vlc_playlist.h : Playlist functions
- *****************************************************************************
- * Copyright (C) 1999-2004 the VideoLAN team
- * $Id: 86c424acb55a77459c93bf905b7136bb991a2932 $
- *
- * Authors: Samuel Hocevar <sam@zoy.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
- #ifndef VLC_PLAYLIST_H_
- #define VLC_PLAYLIST_H_
-
- # ifdef __cplusplus
- extern "C" {
- # endif
-
- #include <vlc_input.h>
- #include <vlc_events.h>
-
- TYPEDEF_ARRAY(playlist_item_t*, playlist_item_array_t)
-
- /**
- * \file
- * This file contain structures and function prototypes related
- * to the playlist in vlc
- *
- * \defgroup vlc_playlist Playlist
- *
- * The VLC playlist system has a tree structure. This allows advanced
- * categorization, like for SAP streams (which are grouped by "sap groups").
- *
- * The base structure for all playlist operations is the input_item_t. This
- * contains all information needed to play a stream and get info, ie, mostly,
- * mrl and metadata. This structure contains a unique i_id field. ids are
- * not recycled when an item is destroyed.
- *
- * Input items are not used directly, but through playlist items.
- * The playlist items are themselves in a tree structure. They only contain
- * a link to the input item, a unique id and a few flags. the playlist
- * item id is NOT the same as the input item id.
- * Several playlist items can be attached to a single input item. The input
- * item is refcounted and is automatically destroyed when it is not used
- * anymore.
- *
- * The top-level items are the main media sources and include:
- * playlist, media library, SAP, Shoutcast, devices, ...
- *
- * It is envisioned that a third tree will appear: VLM, but it's not done yet
- *
- * The playlist also stores, for utility purposes, an array of all input
- * items, an array of all playlist items and an array of all playlist items
- * and nodes (both are represented by the same structure).
- *
- * So, here is an example:
- * \verbatim
- * Inputs array
- * - input 1 -> name = foo 1 uri = ...
- * - input 2 -> name = foo 2 uri = ...
- *
- * Playlist items tree
- * - playlist (id 1)
- * - category 1 (id 2)
- * - foo 2 (id 6 - input 2)
- * - media library (id 2)
- * - foo 1 (id 5 - input 1)
- * \endverbatim
- *
- * Sometimes, an item creates subitems. This happens for the directory access
- * for example. In that case, if the item is under the "playlist" top-level item
- * and playlist is configured to be flat then the item will be deleted and
- * replaced with new subitems. If the item is under another top-level item, it
- * will be transformed to a node and removed from the list of all items without
- * nodes.
- *
- * For "standard" item addition, you can use playlist_Add, playlist_AddExt
- * (more options) or playlist_AddInput if you already created your input
- * item. This will add the item at the root of "Playlist" or of "Media library"
- * in each of the two trees.
- *
- * You can create nodes with playlist_NodeCreate and can create items from
- * existing input items to be placed under any node with playlist_NodeAddInput.
- *
- * To delete an item, use playlist_DeleteFromInput( p_item ) which will
- * remove all occurrences of the input.
- *
- *
- * The playlist defines the following event variables:
- *
- * - "item-change": It will contain the input_item_t->i_id of a changed input
- * item monitored by the playlist.
- * - "item-current": It will contain a input_item_t->i_id of the current
- * item being played.
- *
- * - "playlist-item-append": It will contain a pointer to a playlist_add_t.
- * - "playlist-item-deleted": It will contain the playlist_item_t->i_id of a
- * deleted playlist_item_t.
- *
- * - "leaf-to-parent": Set when an item gets subitems and is transformed to a
- * node. It will contain a pointer to the input_item_t bound to the transformed
- * playlist item.
- *
- *
- * XXX Be really carefull, playlist_item_t->i_id and input_item_t->i_id are not
- * the same. Yes, the situation is pretty bad.
- *
- * @{
- */
-
- /** Helper structure to export to file part of the playlist */
- typedef struct playlist_export_t
- {
- VLC_COMMON_MEMBERS
- const char *psz_filename;
- FILE *p_file;
- playlist_item_t *p_root;
- } playlist_export_t;
-
- /** playlist item / node */
- struct playlist_item_t
- {
- input_item_t *p_input; /**< Linked input item */
- /** Number of children, -1 if not a node */
- int i_children;
- playlist_item_t **pp_children; /**< Children nodes/items */
- playlist_item_t *p_parent; /**< Item parent */
-
- int i_id; /**< Playlist item specific id */
- uint8_t i_flags; /**< Flags */
- playlist_t *p_playlist; /**< Parent playlist */
- };
-
- #define PLAYLIST_SAVE_FLAG 0x0001 /**< Must it be saved */
- #define PLAYLIST_SKIP_FLAG 0x0002 /**< Must playlist skip after it ? */
- #define PLAYLIST_DBL_FLAG 0x0004 /**< Is it disabled ? */
- #define PLAYLIST_RO_FLAG 0x0008 /**< Write-enabled ? */
- #define PLAYLIST_REMOVE_FLAG 0x0010 /**< Remove this item at the end */
- #define PLAYLIST_EXPANDED_FLAG 0x0020 /**< Expanded node */
- #define PLAYLIST_SUBITEM_STOP_FLAG 0x0040 /**< Must playlist stop if the item gets subitems ?*/
-
- /** Playlist status */
- typedef enum
- { PLAYLIST_STOPPED,PLAYLIST_RUNNING,PLAYLIST_PAUSED } playlist_status_t;
-
- /** Structure containing information about the playlist */
- struct playlist_t
- {
- VLC_COMMON_MEMBERS
-
- playlist_item_array_t items; /**< Arrays of items */
- playlist_item_array_t all_items; /**< Array of items and nodes */
-
- playlist_item_array_t current; /**< Items currently being played */
- int i_current_index; /**< Index in current array */
-
- /* Predefined items */
- playlist_item_t * p_root;
- playlist_item_t * p_playing;
- playlist_item_t * p_media_library;
-
- //Phony ones, point to those above;
- playlist_item_t * p_root_category; /**< Root of category tree */
- playlist_item_t * p_root_onelevel; /**< Root of onelevel tree */
- playlist_item_t * p_local_category; /** < "Playlist" in CATEGORY view */
- playlist_item_t * p_ml_category; /** < "Library" in CATEGORY view */
- playlist_item_t * p_local_onelevel; /** < "Playlist" in ONELEVEL view */
- playlist_item_t * p_ml_onelevel; /** < "Library" in ONELEVEL view */
- };
-
- /** Helper to add an item */
- struct playlist_add_t
- {
- int i_node; /**< Playist id of the parent node */
- int i_item; /**< Playist id of the playlist_item_t */
- };
-
- /* A bit of macro magic to generate an enum out of the following list,
- * and later, to generate a list of static functions out of the same list.
- * There is also SORT_RANDOM, which is always last and handled specially.
- */
- #define VLC_DEFINE_SORT_FUNCTIONS \
- DEF( SORT_ID )\
- DEF( SORT_TITLE )\
- DEF( SORT_TITLE_NODES_FIRST )\
- DEF( SORT_ARTIST )\
- DEF( SORT_GENRE )\
- DEF( SORT_DURATION )\
- DEF( SORT_TITLE_NUMERIC )\
- DEF( SORT_ALBUM )\
- DEF( SORT_TRACK_NUMBER )\
- DEF( SORT_DESCRIPTION )\
- DEF( SORT_RATING )\
- DEF( SORT_URI )
-
- #define DEF( s ) s,
- enum
- {
- VLC_DEFINE_SORT_FUNCTIONS
- SORT_RANDOM,
- NUM_SORT_FNS=SORT_RANDOM
- };
- #undef DEF
- #ifndef VLC_INTERNAL_PLAYLIST_SORT_FUNCTIONS
- #undef VLC_DEFINE_SORT_FUNCTIONS
- #endif
-
- enum
- {
- ORDER_NORMAL = 0,
- ORDER_REVERSE = 1,
- };
-
- /* Used by playlist_Import */
- #define PLAYLIST_INSERT 0x0001
- #define PLAYLIST_APPEND 0x0002
- #define PLAYLIST_GO 0x0004
- #define PLAYLIST_PREPARSE 0x0008
- #define PLAYLIST_SPREPARSE 0x0010
- #define PLAYLIST_NO_REBUILD 0x0020
-
- #define PLAYLIST_END -666
-
- enum pl_locked_state
- {
- pl_Locked = true,
- pl_Unlocked = false
- };
-
- /*****************************************************************************
- * Prototypes
- *****************************************************************************/
-
- /* Helpers */
- #define PL_LOCK playlist_Lock( p_playlist )
- #define PL_UNLOCK playlist_Unlock( p_playlist )
- #define PL_ASSERT_LOCKED playlist_AssertLocked( p_playlist )
-
- VLC_EXPORT( playlist_t *, pl_Get, ( vlc_object_t * ) );
- #define pl_Get( a ) pl_Get( VLC_OBJECT(a) )
-
- /* Playlist control */
- #define playlist_Play(p) playlist_Control(p,PLAYLIST_PLAY, pl_Unlocked )
- #define playlist_Pause(p) playlist_Control(p,PLAYLIST_PAUSE, pl_Unlocked )
- #define playlist_Stop(p) playlist_Control(p,PLAYLIST_STOP, pl_Unlocked )
- #define playlist_Next(p) playlist_Control(p,PLAYLIST_SKIP, pl_Unlocked, 1)
- #define playlist_Prev(p) playlist_Control(p,PLAYLIST_SKIP, pl_Unlocked, -1)
- #define playlist_Skip(p,i) playlist_Control(p,PLAYLIST_SKIP, pl_Unlocked, (i) )
-
- VLC_EXPORT( void, playlist_Lock, ( playlist_t * ) );
- VLC_EXPORT( void, playlist_Unlock, ( playlist_t * ) );
- VLC_EXPORT( void, playlist_AssertLocked, ( playlist_t * ) );
-
- /**
- * Do a playlist action.
- * If there is something in the playlist then you can do playlist actions.
- * Possible queries are listed in vlc_common.h
- * \param p_playlist the playlist to do the command on
- * \param i_query the command to do
- * \param b_locked TRUE if playlist is locked when entering this function
- * \param variable number of arguments
- * \return VLC_SUCCESS or an error
- */
- VLC_EXPORT( int, playlist_Control, ( playlist_t *p_playlist, int i_query, bool b_locked, ... ) );
-
- /** Get current playing input. The object is retained.
- */
- VLC_EXPORT( input_thread_t *, playlist_CurrentInput, ( playlist_t *p_playlist ) );
-
- /** Clear the playlist
- * \param b_locked TRUE if playlist is locked when entering this function
- */
- VLC_EXPORT( void, playlist_Clear, ( playlist_t *, bool ) );
-
- /** Enqueue an input item for preparsing */
- VLC_EXPORT( int, playlist_PreparseEnqueue, (playlist_t *, input_item_t * ) );
-
- /** Request the art for an input item to be fetched */
- VLC_EXPORT( int, playlist_AskForArtEnqueue, (playlist_t *, input_item_t * ) );
-
- /* Playlist sorting */
- VLC_EXPORT( int, playlist_TreeMove, ( playlist_t *, playlist_item_t *, playlist_item_t *, int ) );
- VLC_EXPORT( int, playlist_TreeMoveMany, ( playlist_t *, int, playlist_item_t **, playlist_item_t *, int ) );
- VLC_EXPORT( int, playlist_RecursiveNodeSort, ( playlist_t *, playlist_item_t *,int, int ) );
-
- VLC_EXPORT( playlist_item_t *, playlist_CurrentPlayingItem, ( playlist_t * ) );
- VLC_EXPORT( int, playlist_Status, ( playlist_t * ) );
-
- /**
- * Export a node of the playlist to a certain type of playlistfile
- * \param p_playlist the playlist to export
- * \param psz_filename the location where the exported file will be saved
- * \param p_export_root the root node to export
- * \param psz_type the type of playlist file to create (m3u, pls, ..)
- * \return VLC_SUCCESS on success
- */
- VLC_EXPORT( int, playlist_Export, ( playlist_t *p_playlist, const char *psz_name, playlist_item_t *p_export_root, const char *psz_type ) );
-
- /**
- * Open a playlist file, add its content to the current playlist
- */
- VLC_EXPORT( int, playlist_Import, ( playlist_t *p_playlist, const char *psz_file ) );
-
- /********************** Services discovery ***********************/
-
- /** Add a list of comma-separated service discovery modules */
- VLC_EXPORT( int, playlist_ServicesDiscoveryAdd, (playlist_t *, const char *));
- /** Remove a services discovery module by name */
- VLC_EXPORT( int, playlist_ServicesDiscoveryRemove, (playlist_t *, const char *));
- /** Check whether a given SD is loaded */
- VLC_EXPORT( bool, playlist_IsServicesDiscoveryLoaded, ( playlist_t *,const char *));
-
-
-
- /********************************************************
- * Item management
- ********************************************************/
-
- /*************************** Item deletion **************************/
- VLC_EXPORT( int, playlist_DeleteFromInput, ( playlist_t *, input_item_t *, bool ) );
-
- /******************** Item addition ********************/
- VLC_EXPORT( int, playlist_Add, ( playlist_t *, const char *, const char *, int, int, bool, bool ) );
- VLC_EXPORT( int, playlist_AddExt, ( playlist_t *, const char *, const char *, int, int, mtime_t, int, const char *const *, unsigned, bool, bool ) );
- VLC_EXPORT( int, playlist_AddInput, ( playlist_t *, input_item_t *, int, int, bool, bool ) );
- VLC_EXPORT( playlist_item_t *, playlist_NodeAddInput, ( playlist_t *, input_item_t *, playlist_item_t *, int, int, bool ) );
- VLC_EXPORT( int, playlist_NodeAddCopy, ( playlist_t *, playlist_item_t *, playlist_item_t *, int ) );
-
- /********************************** Item search *************************/
- VLC_EXPORT( playlist_item_t *, playlist_ItemGetById, (playlist_t *, int ) );
- VLC_EXPORT( playlist_item_t *, playlist_ItemGetByInput, (playlist_t *,input_item_t * ) );
-
- VLC_EXPORT( int, playlist_LiveSearchUpdate, (playlist_t *, playlist_item_t *, const char *, bool ) );
-
- /********************************************************
- * Tree management
- ********************************************************/
- /* Node management */
- VLC_EXPORT( playlist_item_t *, playlist_NodeCreate, ( playlist_t *, const char *, playlist_item_t * p_parent, int i_pos, int i_flags, input_item_t * ) );
- VLC_EXPORT( int, playlist_NodeAppend, (playlist_t *,playlist_item_t*,playlist_item_t *) );
- VLC_EXPORT( int, playlist_NodeInsert, (playlist_t *,playlist_item_t*,playlist_item_t *, int) );
- VLC_EXPORT( int, playlist_NodeRemoveItem, (playlist_t *,playlist_item_t*,playlist_item_t *) );
- VLC_EXPORT( playlist_item_t *, playlist_ChildSearchName, (playlist_item_t*, const char* ) );
- VLC_EXPORT( int, playlist_NodeDelete, ( playlist_t *, playlist_item_t *, bool , bool ) );
-
- VLC_EXPORT( playlist_item_t *, playlist_GetNextLeaf, ( playlist_t *p_playlist, playlist_item_t *p_root, playlist_item_t *p_item, bool b_ena, bool b_unplayed ) );
- VLC_EXPORT( playlist_item_t *, playlist_GetPrevLeaf, ( playlist_t *p_playlist, playlist_item_t *p_root, playlist_item_t *p_item, bool b_ena, bool b_unplayed ) );
-
- /***********************************************************************
- * Inline functions
- ***********************************************************************/
- /** Small helper tp get current playing input or NULL. Release the input after use. */
- #define pl_CurrentInput(a) __pl_CurrentInput( VLC_OBJECT(a) )
- static inline input_thread_t * __pl_CurrentInput( vlc_object_t * p_this )
- {
- return playlist_CurrentInput( pl_Get( p_this ) );
- }
-
- /** Tell if the playlist is empty */
- static inline bool playlist_IsEmpty( playlist_t *p_playlist )
- {
- PL_ASSERT_LOCKED;
- return p_playlist->items.i_size == 0;
- }
-
- /** Tell the number of items in the current playing context */
- static inline int playlist_CurrentSize( playlist_t *p_playlist )
- {
- PL_ASSERT_LOCKED;
- return p_playlist->current.i_size;
- }
-
- /** @} */
- # ifdef __cplusplus
- }
- # endif
-
- #endif
-