mirror of
https://code.videolan.org/videolan/vlc
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409 lines
16 KiB
C
409 lines
16 KiB
C
/*****************************************************************************
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* vlc_playlist.h : Playlist functions
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*****************************************************************************
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* Copyright (C) 1999-2004 the VideoLAN team
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* $Id$
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*
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* Authors: Samuel Hocevar <sam@zoy.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef VLC_PLAYLIST_H_
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#define VLC_PLAYLIST_H_
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# ifdef __cplusplus
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extern "C" {
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# endif
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#include <vlc_input.h>
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#include <vlc_events.h>
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TYPEDEF_ARRAY(playlist_item_t*, playlist_item_array_t)
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/**
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* \file
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* This file contain structures and function prototypes related
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* to the playlist in vlc
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*
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* \defgroup vlc_playlist Playlist
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*
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* The VLC playlist system has a tree structure. This allows advanced
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* categorization, like for SAP streams (which are grouped by "sap groups").
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*
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* The base structure for all playlist operations is the input_item_t. This
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* contains all information needed to play a stream and get info, ie, mostly,
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* mrl and metadata. This structure contains a unique i_id field. ids are
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* not recycled when an item is destroyed.
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*
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* Input items are not used directly, but through playlist items.
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* The playlist items are themselves in a tree structure. They only contain
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* a link to the input item, a unique id and a few flags. the playlist
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* item id is NOT the same as the input item id.
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* Several playlist items can be attached to a single input item. The input
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* item is refcounted and is automatically destroyed when it is not used
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* anymore.
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*
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* In the playlist itself, there are two trees, that should always be kept
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* in sync. The "category" tree contains the whole tree structure with
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* several levels, while the onelevel tree contains only one level :), ie
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* it only contains "real" items, not nodes
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* For example, if you open a directory, you will have
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*\verbatim
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* Category tree: Onelevel tree:
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* Playlist Playlist
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* - Dir - item1
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* - Subdir - item2
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* - item1
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* - item2
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*\endverbatim
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* The top-level items of both tree are the same, and they are reproduced
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* in the left-part of the playlist GUIs, they are the "sources" from the
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* source selectors. Top-level items include: playlist, media library, SAP,
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* Shoutcast, devices, ...
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*
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* It is envisioned that a third tree will appear: VLM, but it's not done yet
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*
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* The playlist also stores, for utility purposes, an array of all input
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* items, an array of all playlist items and an array of all playlist items
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* and nodes (both are represented by the same structure).
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*
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* So, here is an example:
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* \verbatim
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* Inputs array
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* - input 1 -> name = foo 1 uri = ...
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* - input 2 -> name = foo 2 uri = ...
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*
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* Category tree Onelevel tree
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* - playlist (id 1) - playlist (id 3)
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* - category 1 (id 2) - foo 2 (id 8 - input 2)
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* - foo 2 (id 6 - input 2) - media library (id 4)
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* - media library (id 2) - foo 1 (id6 - input 1)
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* - foo 1 (id 5 - input 1)
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* \endverbatim
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* Sometimes, an item must be transformed to a node. This happens for the
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* directory access for example. In that case, the item is removed from
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* the onelevel tree, as it is not a real item anymore.
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*
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* For "standard" item addition, you can use playlist_Add, playlist_AddExt
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* (more options) or playlist_AddInput if you already created your input
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* item. This will add the item at the root of "Playlist" or of "Media library"
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* in each of the two trees.
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*
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* If you want more control (like, adding the item as the child of a given
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* node in the category tree, use playlist_BothAddInput. You'll have to provide
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* the node in the category tree. The item will be added as a child of
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* this node in the category tree, and as a child of the matching top-level
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* node in the onelevel tree. (Nodes are created with playlist_NodeCreate)
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*
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* Generally speaking, playlist_NodeAddInput should not be used in newer code, it
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* will maybe become useful again when we merge VLM;
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*
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* To delete an item, use playlist_DeleteFromInput( p_item ) which will
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* remove all occurrences of the input in both trees
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*
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*
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* The playlist defines the following event variables:
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*
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* - "item-change": It will contains the input_item_t->i_id of a changed input
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* item monitored by the playlist.
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* * - "item-current": It will contains a input_item_t->i_id of the current
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* item being played.
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*
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* - "playlist-item-append": It will contains a pointer to a playlist_add_t.
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* - "playlist-item-deleted": It will contains the playlist_item_t->i_id of a deleted
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* playlist_item_t.
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*
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* XXX Be really carefull, playlist_item_t->i_id and input_item_t->i_id are not
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* the same. Yes, the situation is pretty bad.
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*
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* @{
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*/
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/** Helper structure to export to file part of the playlist */
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typedef struct playlist_export_t
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{
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VLC_COMMON_MEMBERS
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const char *psz_filename;
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FILE *p_file;
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playlist_item_t *p_root;
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} playlist_export_t;
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/** playlist item / node */
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struct playlist_item_t
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{
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input_item_t *p_input; /**< Linked input item */
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/** Number of children, -1 if not a node */
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int i_children;
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playlist_item_t **pp_children; /**< Children nodes/items */
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playlist_item_t *p_parent; /**< Item parent */
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int i_id; /**< Playlist item specific id */
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uint8_t i_flags; /**< Flags */
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playlist_t *p_playlist; /**< Parent playlist */
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};
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#define PLAYLIST_SAVE_FLAG 0x0001 /**< Must it be saved */
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#define PLAYLIST_SKIP_FLAG 0x0002 /**< Must playlist skip after it ? */
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#define PLAYLIST_DBL_FLAG 0x0004 /**< Is it disabled ? */
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#define PLAYLIST_RO_FLAG 0x0008 /**< Write-enabled ? */
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#define PLAYLIST_REMOVE_FLAG 0x0010 /**< Remove this item at the end */
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#define PLAYLIST_EXPANDED_FLAG 0x0020 /**< Expanded node */
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#define PLAYLIST_SUBITEM_STOP_FLAG 0x0040 /**< Must playlist stop if the item gets subitems ?*/
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/** Playlist status */
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typedef enum
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{ PLAYLIST_STOPPED,PLAYLIST_RUNNING,PLAYLIST_PAUSED } playlist_status_t;
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/** Structure containing information about the playlist */
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struct playlist_t
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{
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VLC_COMMON_MEMBERS
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playlist_item_array_t items; /**< Arrays of items */
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playlist_item_array_t all_items; /**< Array of items and nodes */
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playlist_item_array_t current; /**< Items currently being played */
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int i_current_index; /**< Index in current array */
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/* Predefined items */
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playlist_item_t * p_root;
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playlist_item_t * p_playing;
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playlist_item_t * p_media_library;
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//Phony ones, point to those above;
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playlist_item_t * p_root_category; /**< Root of category tree */
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playlist_item_t * p_root_onelevel; /**< Root of onelevel tree */
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playlist_item_t * p_local_category; /** < "Playlist" in CATEGORY view */
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playlist_item_t * p_ml_category; /** < "Library" in CATEGORY view */
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playlist_item_t * p_local_onelevel; /** < "Playlist" in ONELEVEL view */
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playlist_item_t * p_ml_onelevel; /** < "Library" in ONELEVEL view */
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};
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/** Helper to add an item */
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struct playlist_add_t
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{
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int i_node; /**< Playist id of the parent node */
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int i_item; /**< Playist id of the playlist_item_t */
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};
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/* A bit of macro magic to generate an enum out of the following list,
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* and later, to generate a list of static functions out of the same list.
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* There is also SORT_RANDOM, which is always last and handled specially.
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*/
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#define VLC_DEFINE_SORT_FUNCTIONS \
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DEF( SORT_ID )\
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DEF( SORT_TITLE )\
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DEF( SORT_TITLE_NODES_FIRST )\
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DEF( SORT_ARTIST )\
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DEF( SORT_GENRE )\
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DEF( SORT_DURATION )\
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DEF( SORT_TITLE_NUMERIC )\
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DEF( SORT_ALBUM )\
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DEF( SORT_TRACK_NUMBER )\
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DEF( SORT_DESCRIPTION )\
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DEF( SORT_RATING )\
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DEF( SORT_URI )
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#define DEF( s ) s,
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enum
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{
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VLC_DEFINE_SORT_FUNCTIONS
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SORT_RANDOM,
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NUM_SORT_FNS=SORT_RANDOM
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};
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#undef DEF
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#ifndef VLC_INTERNAL_PLAYLIST_SORT_FUNCTIONS
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#undef VLC_DEFINE_SORT_FUNCTIONS
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#endif
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enum
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{
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ORDER_NORMAL = 0,
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ORDER_REVERSE = 1,
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};
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/* Used by playlist_Import */
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#define PLAYLIST_INSERT 0x0001
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#define PLAYLIST_APPEND 0x0002
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#define PLAYLIST_GO 0x0004
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#define PLAYLIST_PREPARSE 0x0008
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#define PLAYLIST_SPREPARSE 0x0010
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#define PLAYLIST_NO_REBUILD 0x0020
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#define PLAYLIST_END -666
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enum pl_locked_state
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{
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pl_Locked = true,
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pl_Unlocked = false
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};
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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/* Helpers */
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#define PL_LOCK playlist_Lock( p_playlist )
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#define PL_UNLOCK playlist_Unlock( p_playlist )
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#define PL_ASSERT_LOCKED playlist_AssertLocked( p_playlist )
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VLC_EXPORT( playlist_t *, pl_Hold, ( vlc_object_t * ) );
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#define pl_Hold( a ) pl_Hold( VLC_OBJECT(a) )
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VLC_EXPORT( void, pl_Release, ( vlc_object_t * ) );
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#define pl_Release(a) pl_Release( VLC_OBJECT(a) )
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/* Playlist control */
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#define playlist_Play(p) playlist_Control(p,PLAYLIST_PLAY, pl_Unlocked )
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#define playlist_Pause(p) playlist_Control(p,PLAYLIST_PAUSE, pl_Unlocked )
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#define playlist_Stop(p) playlist_Control(p,PLAYLIST_STOP, pl_Unlocked )
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#define playlist_Next(p) playlist_Control(p,PLAYLIST_SKIP, pl_Unlocked, 1)
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#define playlist_Prev(p) playlist_Control(p,PLAYLIST_SKIP, pl_Unlocked, -1)
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#define playlist_Skip(p,i) playlist_Control(p,PLAYLIST_SKIP, pl_Unlocked, (i) )
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VLC_EXPORT( void, playlist_Lock, ( playlist_t * ) );
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VLC_EXPORT( void, playlist_Unlock, ( playlist_t * ) );
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VLC_EXPORT( void, playlist_AssertLocked, ( playlist_t * ) );
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/**
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* Do a playlist action.
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* If there is something in the playlist then you can do playlist actions.
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* Possible queries are listed in vlc_common.h
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* \param p_playlist the playlist to do the command on
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* \param i_query the command to do
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* \param b_locked TRUE if playlist is locked when entering this function
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* \param variable number of arguments
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* \return VLC_SUCCESS or an error
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*/
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VLC_EXPORT( int, playlist_Control, ( playlist_t *p_playlist, int i_query, bool b_locked, ... ) );
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/** Get current playing input. The object is retained.
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*/
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VLC_EXPORT( input_thread_t *, playlist_CurrentInput, ( playlist_t *p_playlist ) );
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/** Clear the playlist
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* \param b_locked TRUE if playlist is locked when entering this function
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*/
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VLC_EXPORT( void, playlist_Clear, ( playlist_t *, bool ) );
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/** Enqueue an input item for preparsing */
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VLC_EXPORT( int, playlist_PreparseEnqueue, (playlist_t *, input_item_t *, bool b_locked ) );
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/** Request the art for an input item to be fetched */
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VLC_EXPORT( int, playlist_AskForArtEnqueue, (playlist_t *, input_item_t *, bool b_locked ) );
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/* Playlist sorting */
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VLC_EXPORT( int, playlist_TreeMove, ( playlist_t *, playlist_item_t *, playlist_item_t *, int ) );
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VLC_EXPORT( int, playlist_TreeMoveMany, ( playlist_t *, int, playlist_item_t **, playlist_item_t *, int ) );
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VLC_EXPORT( int, playlist_RecursiveNodeSort, ( playlist_t *, playlist_item_t *,int, int ) );
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VLC_EXPORT( playlist_item_t *, playlist_CurrentPlayingItem, ( playlist_t * ) );
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VLC_EXPORT( int, playlist_Status, ( playlist_t * ) );
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/**
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* Export a node of the playlist to a certain type of playlistfile
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* \param p_playlist the playlist to export
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* \param psz_filename the location where the exported file will be saved
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* \param p_export_root the root node to export
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* \param psz_type the type of playlist file to create (m3u, pls, ..)
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* \return VLC_SUCCESS on success
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*/
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VLC_EXPORT( int, playlist_Export, ( playlist_t *p_playlist, const char *psz_name, playlist_item_t *p_export_root, const char *psz_type ) );
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/**
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* Open a playlist file, add its content to the current playlist
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*/
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VLC_EXPORT( int, playlist_Import, ( playlist_t *p_playlist, const char *psz_file ) );
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/********************** Services discovery ***********************/
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/** Add a list of comma-separated service discovery modules */
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VLC_EXPORT( int, playlist_ServicesDiscoveryAdd, (playlist_t *, const char *));
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/** Remove a services discovery module by name */
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VLC_EXPORT( int, playlist_ServicesDiscoveryRemove, (playlist_t *, const char *));
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/** Check whether a given SD is loaded */
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VLC_EXPORT( bool, playlist_IsServicesDiscoveryLoaded, ( playlist_t *,const char *));
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/********************************************************
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* Item management
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********************************************************/
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/*************************** Item deletion **************************/
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VLC_EXPORT( int, playlist_DeleteFromInput, ( playlist_t *, input_item_t *, bool ) );
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/******************** Item addition ********************/
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VLC_EXPORT( int, playlist_Add, ( playlist_t *, const char *, const char *, int, int, bool, bool ) );
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VLC_EXPORT( int, playlist_AddExt, ( playlist_t *, const char *, const char *, int, int, mtime_t, int, const char *const *, unsigned, bool, bool ) );
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VLC_EXPORT( int, playlist_AddInput, ( playlist_t *, input_item_t *, int, int, bool, bool ) );
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VLC_EXPORT( playlist_item_t *, playlist_NodeAddInput, ( playlist_t *, input_item_t *, playlist_item_t *, int, int, bool ) );
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/********************************** Item search *************************/
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VLC_EXPORT( playlist_item_t *, playlist_ItemGetById, (playlist_t *, int ) );
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VLC_EXPORT( playlist_item_t *, playlist_ItemGetByInput, (playlist_t *,input_item_t * ) );
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VLC_EXPORT( int, playlist_LiveSearchUpdate, (playlist_t *, playlist_item_t *, const char *) );
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/********************************************************
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* Tree management
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********************************************************/
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/* Node management */
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VLC_EXPORT( playlist_item_t *, playlist_NodeCreate, ( playlist_t *, const char *, playlist_item_t * p_parent, int i_flags, input_item_t * ) );
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VLC_EXPORT( int, playlist_NodeAppend, (playlist_t *,playlist_item_t*,playlist_item_t *) );
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VLC_EXPORT( int, playlist_NodeInsert, (playlist_t *,playlist_item_t*,playlist_item_t *, int) );
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VLC_EXPORT( int, playlist_NodeRemoveItem, (playlist_t *,playlist_item_t*,playlist_item_t *) );
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VLC_EXPORT( playlist_item_t *, playlist_ChildSearchName, (playlist_item_t*, const char* ) );
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VLC_EXPORT( int, playlist_NodeDelete, ( playlist_t *, playlist_item_t *, bool , bool ) );
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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 ) );
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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 ) );
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/***********************************************************************
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* Inline functions
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***********************************************************************/
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/** Small helper tp get current playing input or NULL. Release the input after use. */
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#define pl_CurrentInput(a) __pl_CurrentInput( VLC_OBJECT(a) )
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static inline input_thread_t * __pl_CurrentInput( vlc_object_t * p_this )
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{
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playlist_t * p_playlist = pl_Hold( p_this );
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if( !p_playlist ) return NULL;
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input_thread_t * p_input = playlist_CurrentInput( p_playlist );
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pl_Release( p_this );
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return p_input;
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}
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/** Tell if the playlist is empty */
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static inline bool playlist_IsEmpty( playlist_t *p_playlist )
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{
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PL_ASSERT_LOCKED;
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return p_playlist->items.i_size == 0;
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}
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/** Tell the number of items in the current playing context */
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static inline int playlist_CurrentSize( playlist_t *p_playlist )
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{
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PL_ASSERT_LOCKED;
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return p_playlist->current.i_size;
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}
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/** @} */
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# ifdef __cplusplus
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}
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# endif
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#endif
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