1 /*****************************************************************************
2 * preparser.c: Preparser thread.
3 *****************************************************************************
4 * Copyright © 1999-2009 VLC authors and VideoLAN
7 * Authors: Samuel Hocevar <sam@zoy.org>
8 * Clément Stenac <zorglub@videolan.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
28 #include <vlc_common.h>
29 #include <vlc_playlist.h>
33 #include "preparser.h"
34 #include "../input/input_interface.h"
37 /*****************************************************************************
38 * Structures/definitions
39 *****************************************************************************/
40 struct playlist_preparser_t
42 playlist_t *p_playlist;
43 playlist_fetcher_t *p_fetcher;
48 input_item_t **pp_waiting;
54 static void *Thread( void * );
56 /*****************************************************************************
58 *****************************************************************************/
59 playlist_preparser_t *playlist_preparser_New( playlist_t *p_playlist, playlist_fetcher_t *p_fetcher )
61 playlist_preparser_t *p_preparser = malloc( sizeof(*p_preparser) );
65 p_preparser->p_playlist = p_playlist;
66 p_preparser->p_fetcher = p_fetcher;
67 vlc_mutex_init( &p_preparser->lock );
68 vlc_cond_init( &p_preparser->wait );
69 p_preparser->b_live = false;
70 p_preparser->i_art_policy = var_GetInteger( p_playlist, "album-art" );
71 p_preparser->i_waiting = 0;
72 p_preparser->pp_waiting = NULL;
77 void playlist_preparser_Push( playlist_preparser_t *p_preparser, input_item_t *p_item )
79 vlc_gc_incref( p_item );
81 vlc_mutex_lock( &p_preparser->lock );
82 INSERT_ELEM( p_preparser->pp_waiting, p_preparser->i_waiting,
83 p_preparser->i_waiting, p_item );
84 if( !p_preparser->b_live )
86 if( vlc_clone_detach( NULL, Thread, p_preparser,
87 VLC_THREAD_PRIORITY_LOW ) )
88 msg_Warn( p_preparser->p_playlist,
89 "cannot spawn pre-parser thread" );
91 p_preparser->b_live = true;
93 vlc_mutex_unlock( &p_preparser->lock );
96 void playlist_preparser_Delete( playlist_preparser_t *p_preparser )
98 vlc_mutex_lock( &p_preparser->lock );
99 /* Remove pending item to speed up preparser thread exit */
100 while( p_preparser->i_waiting > 0 )
102 vlc_gc_decref( p_preparser->pp_waiting[0] );
103 REMOVE_ELEM( p_preparser->pp_waiting, p_preparser->i_waiting, 0 );
106 while( p_preparser->b_live )
107 vlc_cond_wait( &p_preparser->wait, &p_preparser->lock );
108 vlc_mutex_unlock( &p_preparser->lock );
110 /* Destroy the item preparser */
111 vlc_cond_destroy( &p_preparser->wait );
112 vlc_mutex_destroy( &p_preparser->lock );
116 /*****************************************************************************
118 *****************************************************************************/
120 * This function preparses an item when needed.
122 static void Preparse( playlist_t *p_playlist, input_item_t *p_item )
124 vlc_mutex_lock( &p_item->lock );
125 int i_type = p_item->i_type;
126 vlc_mutex_unlock( &p_item->lock );
128 if( i_type != ITEM_TYPE_FILE )
130 input_item_SetPreparsed( p_item, true );
134 /* Do not preparse if it is already done (like by playing it) */
135 if( !input_item_IsPreparsed( p_item ) )
137 input_Preparse( VLC_OBJECT(p_playlist), p_item );
138 input_item_SetPreparsed( p_item, true );
140 var_SetAddress( p_playlist, "item-change", p_item );
145 * This function ask the fetcher object to fetch the art when needed
147 static void Art( playlist_preparser_t *p_preparser, input_item_t *p_item )
149 playlist_t *p_playlist = p_preparser->p_playlist;
150 playlist_fetcher_t *p_fetcher = p_preparser->p_fetcher;
152 bool b_fetch = false;
153 /* If we haven't retrieved enough meta, add to secondary queue
154 * which will run the "meta fetchers".
155 * This only checks for meta, not for art
156 * \todo don't do this for things we won't get meta for, like vids
159 vlc_mutex_lock( &p_item->lock );
162 const char *psz_arturl = vlc_meta_Get( p_item->p_meta, vlc_meta_ArtworkURL );
163 const char *psz_name = vlc_meta_Get( p_item->p_meta, vlc_meta_Title );
165 if( p_preparser->i_art_policy == ALBUM_ART_ALL &&
167 ( strncmp( psz_arturl, "file://", 7 ) &&
168 strncmp( psz_arturl, "attachment://", 13 ) ) ) )
170 msg_Dbg( p_playlist, "meta ok for %s, need to fetch art",
171 psz_name ? psz_name : "(null)" );
176 msg_Dbg( p_playlist, "no fetch required for %s (art currently %s)",
177 psz_name ? psz_name : "(null)",
178 psz_arturl ? psz_arturl : "(null)" );
181 vlc_mutex_unlock( &p_item->lock );
183 if( b_fetch && p_fetcher )
184 playlist_fetcher_Push( p_fetcher, p_item );
188 * This function does the preparsing and issues the art fetching requests
190 static void *Thread( void *data )
192 playlist_preparser_t *p_preparser = data;
193 playlist_t *p_playlist = p_preparser->p_playlist;
197 input_item_t *p_current;
200 vlc_mutex_lock( &p_preparser->lock );
201 if( p_preparser->i_waiting > 0 )
203 p_current = p_preparser->pp_waiting[0];
204 REMOVE_ELEM( p_preparser->pp_waiting, p_preparser->i_waiting, 0 );
209 p_preparser->b_live = false;
210 vlc_cond_signal( &p_preparser->wait );
212 vlc_mutex_unlock( &p_preparser->lock );
217 Preparse( p_playlist, p_current );
219 Art( p_preparser, p_current );
220 vlc_gc_decref(p_current);