1 /*****************************************************************************
2 * meta.c: Get meta/artwork using lua scripts
3 *****************************************************************************
4 * Copyright (C) 2007-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea at videolan tod org>
8 * Pierre d'Herbemont <pdherbemont # videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 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 General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
36 #include <vlc_common.h>
37 #include <vlc_input.h>
38 #include <vlc_playlist.h>
40 #include <vlc_art_finder.h>
42 #include <vlc_strings.h>
43 #include <vlc_stream.h>
44 #include <vlc_charset.h>
50 /*****************************************************************************
52 *****************************************************************************/
53 static int fetch_art( vlc_object_t *p_this, const char * psz_filename,
54 lua_State * L, void * user_data );
55 static lua_State *vlclua_meta_init( vlc_object_t *p_this,
56 input_item_t * p_item );
59 /*****************************************************************************
61 *****************************************************************************/
62 static const luaL_Reg p_reg[] = { { NULL, NULL } };
64 static lua_State * vlclua_meta_init( vlc_object_t *p_this, input_item_t * p_item )
66 lua_State * L = luaL_newstate();
69 msg_Err( p_this, "Could not create new Lua State" );
74 /* Load Lua libraries */
75 luaL_openlibs( L ); /* XXX: Don't open all the libs? */
77 luaL_register( L, "vlc", p_reg );
82 luaopen_variables( L );
86 lua_pushlightuserdata( L, p_this );
87 lua_setfield( L, -2, "private" );
89 psz_meta = input_item_GetName( p_item );
90 lua_pushstring( L, psz_meta );
91 lua_setfield( L, -2, "name" );
94 psz_meta = input_item_GetArtist( p_item );
95 lua_pushstring( L, psz_meta );
96 lua_setfield( L, -2, "artist" );
99 psz_meta = input_item_GetTitle( p_item ) ;
100 lua_pushstring( L, psz_meta );
101 lua_setfield( L, -2, "title" );
104 psz_meta = input_item_GetAlbum( p_item );
105 lua_pushstring( L, psz_meta );
106 lua_setfield( L, -2, "album" );
109 psz_meta = input_item_GetArtURL( p_item );
110 lua_pushstring( L, psz_meta );
111 lua_setfield( L, -2, "arturl" );
113 /* XXX: all should be passed ( could use macro ) */
118 /*****************************************************************************
119 * Called through lua_scripts_batch_execute to call 'fetch_art' on the script
120 * pointed by psz_filename.
121 *****************************************************************************/
122 static int fetch_art( vlc_object_t *p_this, const char * psz_filename,
123 lua_State * L, void * user_data )
125 int i_ret = VLC_EGENERIC;
126 input_item_t * p_input = user_data;
129 /* Ugly hack to delete previous versions of the fetchart()
132 lua_setglobal( L, "fetch_art" );
134 /* Load and run the script(s) */
135 if( luaL_dofile( L, psz_filename ) )
137 msg_Warn( p_this, "Error loading script %s: %s", psz_filename,
138 lua_tostring( L, lua_gettop( L ) ) );
143 lua_getglobal( L, "fetch_art" );
145 if( !lua_isfunction( L, lua_gettop( L ) ) )
147 msg_Warn( p_this, "Error while runing script %s, "
148 "function fetch_art() not found", psz_filename );
153 if( lua_pcall( L, 0, 1, 0 ) )
155 msg_Warn( p_this, "Error while runing script %s, "
156 "function fetch_art(): %s", psz_filename,
157 lua_tostring( L, lua_gettop( L ) ) );
162 if((s = lua_gettop( L )))
164 const char * psz_value;
166 if( lua_isstring( L, s ) )
168 psz_value = lua_tostring( L, s );
169 if( psz_value && *psz_value != 0 )
171 lua_Dbg( p_this, "setting arturl: %s", psz_value );
172 input_item_SetArtURL ( p_input, psz_value );
176 else if( !lua_isnil( L, s ) )
178 msg_Err( p_this, "Lua art fetcher script %s: "
179 "didn't return a string", psz_filename );
184 msg_Err( p_this, "Script went completely foobar" );
190 /*****************************************************************************
191 * Module entry point for art.
192 *****************************************************************************/
193 int FindArt( vlc_object_t *p_this )
195 art_finder_t *p_finder = (art_finder_t *)p_this;
196 input_item_t *p_item = p_finder->p_item;
197 playlist_t *p_playlist = pl_Hold( p_this );
201 lua_State *L = vlclua_meta_init( p_this, p_item );
202 int i_ret = vlclua_scripts_batch_execute( p_this, "meta", &fetch_art, L, p_item );
205 pl_Release( p_this );