1 /*****************************************************************************
2 * vlc_playlist.h : Playlist functions
3 *****************************************************************************
4 * Copyright (C) 1999-2004 the VideoLAN team
7 * Authors: Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 #ifndef _VLC_PLAYLIST_H_
25 #define _VLC_PLAYLIST_H_
31 #include <vlc_input.h>
32 #include <vlc_events.h>
33 #include <vlc_services_discovery.h>
37 TYPEDEF_ARRAY(playlist_item_t*, playlist_item_array_t);
41 * This file contain structures and function prototypes related
42 * to the playlist in vlc
44 * \defgroup vlc_playlist Playlist
46 * The VLC playlist system has a tree structure. This allows advanced
47 * categorization, like for SAP streams (which are grouped by "sap groups").
49 * The base structure for all playlist operations is the input_item_t. This
50 * contains all information needed to play a stream and get info, ie, mostly,
51 * mrl and metadata. This structure contains a unique i_id field. ids are
52 * not recycled when an item is destroyed.
54 * Input items are not used directly, but through playlist items.
55 * The playlist items are themselves in a tree structure. They only contain
56 * a link to the input item, a unique id and a few flags. the playlist
57 * item id is NOT the same as the input item id.
58 * Several playlist items can be attached to a single input item. The input
59 * item is refcounted and is automatically destroyed when it is not used
62 * In the playlist itself, there are two trees, that should always be kept
63 * in sync. The "category" tree contains the whole tree structure with
64 * several levels, while the onelevel tree contains only one level :), ie
65 * it only contains "real" items, not nodes
66 * For example, if you open a directory, you will have
68 * Category tree: Onelevel tree:
75 * The top-level items of both tree are the same, and they are reproduced
76 * in the left-part of the playlist GUIs, they are the "sources" from the
77 * source selectors. Top-level items include: playlist, media library, SAP,
78 * Shoutcast, devices, ...
80 * It is envisioned that a third tree will appear: VLM, but it's not done yet
82 * The playlist also stores, for utility purposes, an array of all input
83 * items, an array of all playlist items and an array of all playlist items
84 * and nodes (both are represented by the same structure).
86 * So, here is an example:
89 * - input 1 -> name = foo 1 uri = ...
90 * - input 2 -> name = foo 2 uri = ...
92 * Category tree Onelevel tree
93 * - playlist (id 1) - playlist (id 3)
94 * - category 1 (id 2) - foo 2 (id 8 - input 2)
95 * - foo 2 (id 6 - input 2) - media library (id 4)
96 * - media library (id 2) - foo 1 (id6 - input 1)
97 * - foo 1 (id 5 - input 1)
99 * Sometimes, an item must be transformed to a node. This happens for the
100 * directory access for example. In that case, the item is removed from
101 * the onelevel tree, as it is not a real item anymore.
103 * For "standard" item addition, you can use playlist_Add, playlist_AddExt
104 * (more options) or playlist_AddInput if you already created your input
105 * item. This will add the item at the root of "Playlist" or of "Media library"
106 * in each of the two trees.
108 * If you want more control (like, adding the item as the child of a given
109 * node in the category tree, use playlist_BothAddInput. You'll have to provide
110 * the node in the category tree. The item will be added as a child of
111 * this node in the category tree, and as a child of the matching top-level
112 * node in the onelevel tree. (Nodes are created with playlist_NodeCreate)
114 * Generally speaking, playlist_NodeAddInput should not be used in newer code, it
115 * will maybe become useful again when we merge VLM;
117 * To delete an item, use playlist_DeleteFromInput( input_id ) which will
118 * remove all occurrences of the input in both trees
123 /** Helper structure to export to file part of the playlist */
124 struct playlist_export_t
128 playlist_item_t *p_root;
131 /** playlist item / node */
132 struct playlist_item_t
134 input_item_t *p_input; /**< Linked input item */
135 /** Number of children, -1 if not a node */
137 playlist_item_t **pp_children; /**< Children nodes/items */
138 playlist_item_t *p_parent; /**< Item parent */
140 int i_id; /**< Playlist item specific id */
141 uint8_t i_flags; /**< Flags */
142 playlist_t *p_playlist; /**< Parent playlist */
145 #define PLAYLIST_SAVE_FLAG 0x0001 /**< Must it be saved */
146 #define PLAYLIST_SKIP_FLAG 0x0002 /**< Must playlist skip after it ? */
147 #define PLAYLIST_DBL_FLAG 0x0004 /**< Is it disabled ? */
148 #define PLAYLIST_RO_FLAG 0x0008 /**< Write-enabled ? */
149 #define PLAYLIST_REMOVE_FLAG 0x0010 /**< Remove this item at the end */
150 #define PLAYLIST_EXPANDED_FLAG 0x0020 /**< Expanded node */
152 /** Playlist status */
154 { PLAYLIST_STOPPED,PLAYLIST_RUNNING,PLAYLIST_PAUSED } playlist_status_t;
156 /** Structure containing information about the playlist */
161 struct playlist_services_discovery_support_t {
162 /* the playlist items for category and onelevel */
163 playlist_item_t* p_cat;
164 playlist_item_t* p_one;
165 services_discovery_t * p_sd; /**< Loaded service discovery modules */
167 int i_sds; /**< Number of service discovery modules */
169 playlist_item_array_t items; /**< Arrays of items */
170 playlist_item_array_t all_items; /**< Array of items and nodes */
172 playlist_item_array_t current; /**< Items currently being played */
173 int i_current_index; /**< Index in current array */
174 /** Reset current item array */
175 bool b_reset_currently_playing;
176 mtime_t last_rebuild_date;
178 int i_last_playlist_id; /**< Last id to an item */
180 /* Predefined items */
181 playlist_item_t * p_root_category; /**< Root of category tree */
182 playlist_item_t * p_root_onelevel; /**< Root of onelevel tree */
183 playlist_item_t * p_local_category; /** < "Playlist" in CATEGORY view */
184 playlist_item_t * p_ml_category; /** < "Library" in CATEGORY view */
185 playlist_item_t * p_local_onelevel; /** < "Playlist" in ONELEVEL view */
186 playlist_item_t * p_ml_onelevel; /** < "Library" in ONELEVEL view */
188 bool b_tree; /**< Display as a tree */
190 bool b_doing_ml; /**< Doing media library stuff,
192 bool b_auto_preparse;
195 input_thread_t * p_input; /**< the input thread associated
196 * with the current item */
197 int i_sort; /**< Last sorting applied to the playlist */
198 int i_order; /**< Last ordering applied to the playlist */
201 playlist_preparse_t *p_preparse; /**< Preparser object */
202 playlist_fetcher_t *p_fetcher;/**< Meta and art fetcher object */
204 vlc_mutex_t gc_lock; /**< Lock to protect the garbage collection */
207 /* Current status. These fields are readonly, only the playlist
208 * main loop can touch it*/
209 playlist_status_t i_status; /**< Current status of playlist */
210 playlist_item_t * p_item; /**< Currently playing/active item */
211 playlist_item_t * p_node; /**< Current node to play from */
215 /* Request. Use this to give orders to the playlist main loop */
216 int i_status; /**< requested playlist status */
217 playlist_item_t * p_node; /**< requested node to play from */
218 playlist_item_t * p_item; /**< requested item to play in the node */
220 int i_skip; /**< Number of items to skip */
222 bool b_request;/**< Set to true by the requester
223 The playlist sets it back to false
224 when processing the request */
225 vlc_mutex_t lock; /**< Lock to protect request */
229 /** Helper to add an item */
230 struct playlist_add_t
239 #define SORT_TITLE_NODES_FIRST 2
240 #define SORT_ARTIST 3
242 #define SORT_RANDOM 5
243 #define SORT_DURATION 6
244 #define SORT_TITLE_NUMERIC 7
246 #define SORT_TRACK_NUMBER 9
247 #define SORT_DESCRIPTION 10
248 #define SORT_RATING 11
250 #define ORDER_NORMAL 0
251 #define ORDER_REVERSE 1
253 /* Used by playlist_Import */
254 #define PLAYLIST_INSERT 0x0001
255 #define PLAYLIST_APPEND 0x0002
256 #define PLAYLIST_GO 0x0004
257 #define PLAYLIST_PREPARSE 0x0008
258 #define PLAYLIST_SPREPARSE 0x0010
259 #define PLAYLIST_NO_REBUILD 0x0020
261 #define PLAYLIST_END -666
263 /*****************************************************************************
265 *****************************************************************************/
268 #define PL_LOCK vlc_object_lock( p_playlist )
269 #define PL_UNLOCK vlc_object_unlock( p_playlist )
271 VLC_EXPORT( playlist_t *, __pl_Yield, ( vlc_object_t * ) );
272 #define pl_Yield( a ) __pl_Yield( VLC_OBJECT(a) )
274 VLC_EXPORT( void, __pl_Release, ( vlc_object_t * ) );
275 #define pl_Release(a) __pl_Release( VLC_OBJECT(a) )
277 /* Playlist control */
278 #define playlist_Play(p) playlist_Control(p,PLAYLIST_PLAY, false )
279 #define playlist_Pause(p) playlist_Control(p,PLAYLIST_PAUSE, false )
280 #define playlist_Stop(p) playlist_Control(p,PLAYLIST_STOP, false )
281 #define playlist_Next(p) playlist_Control(p,PLAYLIST_SKIP, false, 1)
282 #define playlist_Prev(p) playlist_Control(p,PLAYLIST_SKIP, false, -1)
283 #define playlist_Skip(p,i) playlist_Control(p,PLAYLIST_SKIP, false, i)
286 * Do a playlist action.
287 * If there is something in the playlist then you can do playlist actions.
288 * Possible queries are listed in vlc_common.h
289 * \param p_playlist the playlist to do the command on
290 * \param i_query the command to do
291 * \param b_locked TRUE if playlist is locked when entering this function
292 * \param variable number of arguments
293 * \return VLC_SUCCESS or an error
295 VLC_EXPORT( int, playlist_Control, ( playlist_t *p_playlist, int i_query, bool b_locked, ... ) );
297 /** Get current playing input. The object is retained.
299 VLC_EXPORT( input_thread_t *, playlist_CurrentInput, ( playlist_t *p_playlist ) );
301 /** Clear the playlist
302 * \param b_locked TRUE if playlist is locked when entering this function
304 VLC_EXPORT( void, playlist_Clear, ( playlist_t *, bool ) );
306 /** Enqueue an input item for preparsing */
307 VLC_EXPORT( int, playlist_PreparseEnqueue, (playlist_t *, input_item_t *) );
309 /** Enqueue a playlist item and all of its children if any for preparsing */
310 VLC_EXPORT( int, playlist_PreparseEnqueueItem, (playlist_t *, playlist_item_t *) );
311 /** Request the art for an input item to be fetched */
312 VLC_EXPORT( int, playlist_AskForArtEnqueue, (playlist_t *, input_item_t *) );
314 /********************** Services discovery ***********************/
316 /** Add a list of comma-separated service discovery modules */
317 VLC_EXPORT( int, playlist_ServicesDiscoveryAdd, (playlist_t *, const char *));
318 /** Remove a services discovery module by name */
319 VLC_EXPORT( int, playlist_ServicesDiscoveryRemove, (playlist_t *, const char *));
320 /** Check whether a given SD is loaded */
321 VLC_EXPORT( bool, playlist_IsServicesDiscoveryLoaded, ( playlist_t *,const char *));
323 /* Playlist sorting */
324 VLC_EXPORT( int, playlist_TreeMove, ( playlist_t *, playlist_item_t *, playlist_item_t *, int ) );
325 VLC_EXPORT( int, playlist_RecursiveNodeSort, ( playlist_t *, playlist_item_t *,int, int ) );
328 * Export a node of the playlist to a certain type of playlistfile
329 * \param p_playlist the playlist to export
330 * \param psz_filename the location where the exported file will be saved
331 * \param p_export_root the root node to export
332 * \param psz_type the type of playlist file to create (m3u, pls, ..)
333 * \return VLC_SUCCESS on success
335 VLC_EXPORT( int, playlist_Export, ( playlist_t *p_playlist, const char *psz_name, playlist_item_t *p_export_root, const char *psz_type ) );
337 /********************************************************
339 ********************************************************/
341 /*************************** Item creation **************************/
343 VLC_EXPORT( playlist_item_t* , playlist_ItemNewWithType, ( vlc_object_t *,const char *,const char *, int , const char *const *, int, int) );
345 /** Create a new item, without adding it to the playlist
346 * \param p_obj a vlc object (anyone will do)
347 * \param psz_uri the mrl of the item
348 * \param psz_name a text giving a name or description of the item
349 * \return the new item or NULL on failure
351 #define playlist_ItemNew( a , b, c ) \
352 playlist_ItemNewWithType( VLC_OBJECT(a) , b , c, 0, NULL, -1, 0 )
354 #define playlist_ItemNewFromInput(a,b) __playlist_ItemNewFromInput(VLC_OBJECT(a),b)
355 VLC_EXPORT( playlist_item_t *, __playlist_ItemNewFromInput, ( vlc_object_t *p_obj,input_item_t *p_input ) );
357 /*************************** Item deletion **************************/
358 VLC_EXPORT( int, playlist_DeleteFromInput, ( playlist_t *, int, bool ) );
359 VLC_EXPORT( int, playlist_DeleteInputInParent, ( playlist_t *, int, playlist_item_t *, bool ) );
361 /*************************** Item fields accessors **************************/
362 VLC_EXPORT( int, playlist_ItemSetName, (playlist_item_t *, const char * ) );
364 /******************** Item addition ********************/
365 VLC_EXPORT( int, playlist_Add, ( playlist_t *, const char *, const char *, int, int, bool, bool ) );
366 VLC_EXPORT( int, playlist_AddExt, ( playlist_t *, const char *, const char *, int, int, mtime_t, const char *const *,int, bool, bool ) );
367 VLC_EXPORT( int, playlist_AddInput, ( playlist_t *, input_item_t *, int, int, bool, bool ) );
368 VLC_EXPORT( playlist_item_t *, playlist_NodeAddInput, ( playlist_t *, input_item_t *,playlist_item_t *,int , int, bool ) );
369 VLC_EXPORT( int, playlist_BothAddInput, ( playlist_t *, input_item_t *,playlist_item_t *,int , int, int*, int*, bool ) );
371 /********************** Misc item operations **********************/
372 VLC_EXPORT( playlist_item_t*, playlist_ItemToNode, (playlist_t *,playlist_item_t *, bool) );
374 /********************************** Item search *************************/
375 VLC_EXPORT( playlist_item_t *, playlist_ItemGetById, (playlist_t *, int, bool ) );
376 VLC_EXPORT( playlist_item_t *, playlist_ItemGetByInput, (playlist_t *,input_item_t *, bool ) );
377 VLC_EXPORT( playlist_item_t *, playlist_ItemGetByInputId, (playlist_t *, int, playlist_item_t *) );
379 VLC_EXPORT( int, playlist_LiveSearchUpdate, (playlist_t *, playlist_item_t *, const char *) );
381 /********************************************************
383 ********************************************************/
384 VLC_EXPORT( int, playlist_NodeChildrenCount, (playlist_t *,playlist_item_t* ) );
386 /* Node management */
387 VLC_EXPORT( playlist_item_t *, playlist_NodeCreate, ( playlist_t *, const char *, playlist_item_t * p_parent, int i_flags, input_item_t * ) );
388 VLC_EXPORT( int, playlist_NodeAppend, (playlist_t *,playlist_item_t*,playlist_item_t *) );
389 VLC_EXPORT( int, playlist_NodeInsert, (playlist_t *,playlist_item_t*,playlist_item_t *, int) );
390 VLC_EXPORT( int, playlist_NodeRemoveItem, (playlist_t *,playlist_item_t*,playlist_item_t *) );
391 VLC_EXPORT( playlist_item_t *, playlist_ChildSearchName, (playlist_item_t*, const char* ) );
392 VLC_EXPORT( int, playlist_NodeDelete, ( playlist_t *, playlist_item_t *, bool , bool ) );
393 VLC_EXPORT( int, playlist_NodeEmpty, ( playlist_t *, playlist_item_t *, bool ) );
394 VLC_EXPORT( void, playlist_NodesPairCreate, (playlist_t *, const char *, playlist_item_t **, playlist_item_t **, bool ) );
395 VLC_EXPORT( playlist_item_t *, playlist_GetPreferredNode, ( playlist_t *p_playlist, playlist_item_t *p_node ) );
396 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 ) );
397 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 ) );
398 VLC_EXPORT( playlist_item_t *, playlist_GetLastLeaf, ( playlist_t *p_playlist, playlist_item_t *p_root ) );
400 /***********************************************************************
402 ***********************************************************************/
403 /** Open a playlist file, add its content to the current playlist */
404 static inline int playlist_Import( playlist_t *p_playlist, const char *psz_file)
406 char psz_uri[256+10];
407 input_item_t *p_input;
408 snprintf( psz_uri, 256+9, "file/://%s", psz_file );
409 const char *const psz_option = "meta-file";
410 p_input = input_ItemNewExt( p_playlist, psz_uri, psz_file,
411 1, &psz_option, -1 );
412 playlist_AddInput( p_playlist, p_input, PLAYLIST_APPEND, PLAYLIST_END,
414 input_Read( p_playlist, p_input, true );
418 /** Small helper tp get current playing input or NULL. Release the input after use. */
419 #define pl_CurrentInput(a) __pl_CurrentInput( VLC_OBJECT(a) )
420 static inline input_thread_t * __pl_CurrentInput( vlc_object_t * p_this )
422 playlist_t * p_playlist = pl_Yield( p_this );
423 if( !p_playlist ) return NULL;
424 input_thread_t * p_input = playlist_CurrentInput( p_playlist );
425 pl_Release( p_this );
429 /** Tell if the playlist is currently running */
430 #define playlist_IsPlaying( pl ) ( pl->status.i_status == PLAYLIST_RUNNING && \
431 !(pl->request.b_request && pl->request.i_status == PLAYLIST_STOPPED) )
433 #define playlist_IsStopped( pl ) ( pl->status.i_status == PLAYLIST_STOPPED || \
434 (pl->request.b_request && pl->request.i_status == PLAYLIST_STOPPED) )
436 /** Tell if the playlist is empty */
437 #define playlist_IsEmpty( pl ) ( pl->items.i_size == 0 )
439 /** Tell the number of items in the current playing context */
440 #define playlist_CurrentSize( pl ) pl->current.i_size
442 /** Tell the current item id in current playing context */
443 #define playlist_CurrentId( pl ) pl->status.p_item->i_id
445 /** Ask the playlist to do some work */
446 #define playlist_Signal( p_playlist ) vlc_object_signal( p_playlist )