1 /*****************************************************************************
2 * objects.c: Generic lua<->vlc object wrapper
3 *****************************************************************************
4 * Copyright (C) 2007-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea at videolan tod 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 /*****************************************************************************
26 *****************************************************************************/
35 #include <vlc_common.h>
37 #include <lua.h> /* Low level lua C API */
38 #include <lauxlib.h> /* Higher level C API */
51 /*****************************************************************************
52 * Generic vlc_object_t wrapper creation
53 *****************************************************************************/
54 int __vlclua_push_vlc_object( lua_State *L, vlc_object_t *p_obj,
57 vlc_object_t **udata = (vlc_object_t **)
58 lua_newuserdata( L, sizeof( vlc_object_t * ) );
61 if( luaL_newmetatable( L, "vlc_object" ) )
63 /* Hide the metatable */
64 lua_pushstring( L, "none of your business" );
65 lua_setfield( L, -2, "__metatable" );
66 if( pf_gc ) /* FIXME */
68 /* Set the garbage collector if needed */
69 lua_pushcfunction( L, pf_gc );
70 lua_setfield( L, -2, "__gc" );
73 lua_setmetatable( L, -2 );
77 int vlclua_gc_release( lua_State *L )
79 vlc_object_t **p_obj = (vlc_object_t **)luaL_checkudata( L, 1, "vlc_object" );
81 vlc_object_release( *p_obj );
85 static int vlc_object_type_from_string( const char *psz_name )
92 { { VLC_OBJECT_LIBVLC, "libvlc" },
93 { VLC_OBJECT_INTF, "intf" },
94 { VLC_OBJECT_INPUT, "input" },
95 { VLC_OBJECT_DECODER, "decoder" },
96 { VLC_OBJECT_VOUT, "vout" },
97 { VLC_OBJECT_AOUT, "aout" },
98 { VLC_OBJECT_PACKETIZER, "packetizer" },
99 { VLC_OBJECT_ENCODER, "encoder" },
100 { VLC_OBJECT_OSDMENU, "osdmenu" },
101 { VLC_OBJECT_GENERIC, "generic" },
104 for( i = 0; pp_objects[i].i_type; i++ )
106 if( !strcmp( psz_name, pp_objects[i].psz_name ) )
107 return pp_objects[i].i_type;
112 static int vlc_object_search_mode_from_string( const char *psz_name )
117 const char *psz_name;
119 { { FIND_PARENT, "parent" },
120 { FIND_CHILD, "child" },
121 { FIND_ANYWHERE, "anywhere" },
124 for( i = 0; pp_modes[i].i_mode; i++ )
126 if( !strcmp( psz_name, pp_modes[i].psz_name ) )
127 return pp_modes[i].i_mode;
132 static int vlclua_object_find( lua_State *L )
134 const char *psz_type = luaL_checkstring( L, 2 );
135 const char *psz_mode = luaL_checkstring( L, 3 );
137 vlc_object_t *p_this;
138 int i_type = vlc_object_type_from_string( psz_type );
139 int i_mode = vlc_object_search_mode_from_string( psz_mode );
140 vlc_object_t *p_result;
143 return luaL_error( L, "\"%s\" is not a valid object type.", psz_type );
145 return luaL_error( L, "\"%s\" is not a valid search mode.", psz_mode );
147 if( lua_type( L, 1 ) == LUA_TNIL )
148 p_this = vlclua_get_this( L );
151 vlc_object_t **p_obj = luaL_checkudata( L, 1, "vlc_object" );
155 p_result = vlc_object_find( p_this, i_type, i_mode );
159 vlclua_push_vlc_object( L, p_result, vlclua_gc_release );
163 static int vlclua_object_find_name( lua_State *L )
165 const char *psz_name = luaL_checkstring( L, 2 );
166 const char *psz_mode = luaL_checkstring( L, 3 );
168 vlc_object_t *p_this;
169 int i_mode = vlc_object_search_mode_from_string( psz_mode );
170 vlc_object_t *p_result;
173 return luaL_error( L, "\"%s\" is not a valid search mode.",
176 if( lua_type( L, 1 ) == LUA_TNIL )
177 p_this = vlclua_get_this( L );
180 vlc_object_t **p_obj = luaL_checkudata( L, 1, "vlc_object" );
184 p_result = vlc_object_find_name( p_this, psz_name, i_mode );
188 vlclua_push_vlc_object( L, p_result, vlclua_gc_release );
192 static int vlclua_get_libvlc( lua_State *L )
194 vlclua_push_vlc_object( L, vlclua_get_this( L )->p_libvlc,
199 static int vlclua_get_playlist( lua_State *L )
201 playlist_t *p_playlist = vlclua_get_playlist_internal( L );
204 vlclua_push_vlc_object( L, p_playlist, vlclua_gc_release );
206 else lua_pushnil( L );
207 //vlclua_release_playlist_internal( p_playlist );
211 static int vlclua_get_input( lua_State *L )
213 input_thread_t *p_input = vlclua_get_input_internal( L );
216 vlclua_push_vlc_object( L, p_input, vlclua_gc_release );
218 else lua_pushnil( L );
222 /*****************************************************************************
224 *****************************************************************************/
225 static const luaL_Reg vlclua_object_reg[] = {
226 { "input", vlclua_get_input },
227 { "playlist", vlclua_get_playlist },
228 { "libvlc", vlclua_get_libvlc },
229 { "find", vlclua_object_find },
230 { "find_name", vlclua_object_find_name },
234 void luaopen_object( lua_State *L )
237 luaL_register( L, NULL, vlclua_object_reg );
238 lua_setfield( L, -2, "object" );