1 /*****************************************************************************
2 * services_discovery.c : Services discovery using lua scripts
3 *****************************************************************************
4 * Copyright (C) 2009 VideoLAN and AUTHORS
6 * Authors: Fabio Ritrovato <sephiroth87 at videolan dot org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
27 #include <vlc_common.h>
28 #include <vlc_services_discovery.h>
29 #include <vlc_playlist.h>
34 /*****************************************************************************
36 *****************************************************************************/
37 static void *Run( void * );
39 static const char * const ppsz_sd_options[] = { "sd", "longname", NULL };
41 /*****************************************************************************
43 *****************************************************************************/
44 struct services_discovery_sys_t
50 static const luaL_Reg p_reg[] = { { NULL, NULL } };
52 /*****************************************************************************
53 * Open: initialize and create stuff
54 *****************************************************************************/
55 int Open_LuaSD( vlc_object_t *p_this )
57 services_discovery_t *p_sd = ( services_discovery_t * )p_this;
58 services_discovery_sys_t *p_sys;
60 char *psz_name = NULL;
62 if( !strcmp(p_sd->psz_name, "lua"))
64 // We want to load the module name "lua"
65 // This module can be used to load lua script not registered
66 // as builtin lua SD modules.
67 config_ChainParse( p_sd, "lua-", ppsz_sd_options, p_sd->p_cfg );
68 psz_name = var_CreateGetString( p_sd, "lua-sd" );
72 // We are loading a builtin lua sd module.
73 psz_name = strdup(p_sd->psz_name);
76 if( !( p_sys = malloc( sizeof( services_discovery_sys_t ) ) ) )
82 p_sys->psz_filename = vlclua_find_file( p_this, "sd", psz_name );
83 if( !p_sys->psz_filename )
85 msg_Err( p_sd, "Couldn't find lua services discovery script \"%s\".",
94 msg_Err( p_sd, "Could not create new Lua State" );
97 vlclua_set_this( L, p_sd );
99 luaL_register( L, "vlc", p_reg );
106 luaopen_strings( L );
107 luaopen_variables( L );
109 luaopen_gettext( L );
114 if( vlclua_add_modules_path( p_sd, L, p_sys->psz_filename ) )
116 msg_Warn( p_sd, "Error while setting the module search path for %s",
117 p_sys->psz_filename );
120 if( luaL_dofile( L, p_sys->psz_filename ) )
123 msg_Err( p_sd, "Error loading script %s: %s", p_sys->psz_filename,
124 lua_tostring( L, lua_gettop( L ) ) );
129 if( vlc_clone (&p_sd->p_sys->thread, Run, p_sd, VLC_THREAD_PRIORITY_LOW) )
137 free( p_sys->psz_filename );
142 /*****************************************************************************
144 *****************************************************************************/
145 void Close_LuaSD( vlc_object_t *p_this )
147 services_discovery_t *p_sd = ( services_discovery_t * )p_this;
149 vlc_join (p_sd->p_sys->thread, NULL);
150 free( p_sd->p_sys->psz_filename );
151 lua_close( p_sd->p_sys->L );
155 /*****************************************************************************
156 * Run: Thread entry-point
157 ****************************************************************************/
158 static void* Run( void *data )
160 services_discovery_t *p_sd = ( services_discovery_t * )data;
161 services_discovery_sys_t *p_sys = p_sd->p_sys;
162 lua_State *L = p_sys->L;
164 lua_getglobal( L, "main" );
165 if( !lua_isfunction( L, lua_gettop( L ) ) || lua_pcall( L, 0, 1, 0 ) )
167 msg_Err( p_sd, "Error while running script %s, "
168 "function main(): %s", p_sys->psz_filename,
169 lua_tostring( L, lua_gettop( L ) ) );
173 msg_Dbg( p_sd, "LuaSD script loaded: %s", p_sys->psz_filename );
175 /* Force garbage collection, because the core will keep the SD
176 * open, but lua will never gc until lua_close(). */
177 lua_gc( L, LUA_GCCOLLECT, 0 );