objects.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:7k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * objects.c: Generic lua<->vlc object wrapper
- *****************************************************************************
- * Copyright (C) 2007-2008 the VideoLAN team
- * $Id: 950f5fe78752237b057432a11d0d8cb05d4ab99b $
- *
- * Authors: Antoine Cellerier <dionoea at videolan tod org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifndef _GNU_SOURCE
- # define _GNU_SOURCE
- #endif
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <lua.h> /* Low level lua C API */
- #include <lauxlib.h> /* Higher level C API */
- #include "../vlc.h"
- #include "../libs.h"
- #include "objects.h"
- #include "playlist.h"
- #include "input.h"
- typedef struct
- {
- vlc_object_t *p_obj;
- } vlclua_object_t;
- /*****************************************************************************
- * Generic vlc_object_t wrapper creation
- *****************************************************************************/
- int __vlclua_push_vlc_object( lua_State *L, vlc_object_t *p_obj,
- lua_CFunction pf_gc )
- {
- vlc_object_t **udata = (vlc_object_t **)
- lua_newuserdata( L, sizeof( vlc_object_t * ) );
- *udata = p_obj;
- if( luaL_newmetatable( L, "vlc_object" ) )
- {
- /* Hide the metatable */
- lua_pushstring( L, "none of your business" );
- lua_setfield( L, -2, "__metatable" );
- if( pf_gc ) /* FIXME */
- {
- /* Set the garbage collector if needed */
- lua_pushcfunction( L, pf_gc );
- lua_setfield( L, -2, "__gc" );
- }
- }
- lua_setmetatable( L, -2 );
- return 1;
- }
- int vlclua_gc_release( lua_State *L )
- {
- vlc_object_t **p_obj = (vlc_object_t **)luaL_checkudata( L, 1, "vlc_object" );
- lua_pop( L, 1 );
- vlc_object_release( *p_obj );
- return 0;
- }
- static int vlc_object_type_from_string( const char *psz_name )
- {
- static const struct
- {
- int i_type;
- const char *psz_name;
- } pp_objects[] =
- { { VLC_OBJECT_INPUT, "input" },
- { VLC_OBJECT_DECODER, "decoder" },
- { VLC_OBJECT_VOUT, "vout" },
- { VLC_OBJECT_AOUT, "aout" },
- { VLC_OBJECT_GENERIC, "generic" },
- { 0, "" } };
- int i;
- for( i = 0; pp_objects[i].i_type; i++ )
- {
- if( !strcmp( psz_name, pp_objects[i].psz_name ) )
- return pp_objects[i].i_type;
- }
- return 0;
- }
- static int vlc_object_search_mode_from_string( const char *psz_name )
- {
- static const struct
- {
- int i_mode;
- const char *psz_name;
- } pp_modes[] =
- { { FIND_PARENT, "parent" },
- { FIND_CHILD, "child" },
- { FIND_ANYWHERE, "anywhere" },
- { 0, "" } };
- int i;
- for( i = 0; pp_modes[i].i_mode; i++ )
- {
- if( !strcmp( psz_name, pp_modes[i].psz_name ) )
- return pp_modes[i].i_mode;
- }
- return 0;
- }
- static int vlclua_object_find( lua_State *L )
- {
- const char *psz_type = luaL_checkstring( L, 2 );
- const char *psz_mode = luaL_checkstring( L, 3 );
- vlc_object_t *p_this;
- int i_type = vlc_object_type_from_string( psz_type );
- int i_mode = vlc_object_search_mode_from_string( psz_mode );
- vlc_object_t *p_result;
- if( !i_type )
- return luaL_error( L, ""%s" is not a valid object type.", psz_type );
- if( !i_mode )
- return luaL_error( L, ""%s" is not a valid search mode.", psz_mode );
- if( lua_type( L, 1 ) == LUA_TNIL )
- p_this = vlclua_get_this( L );
- else
- {
- vlc_object_t **p_obj = luaL_checkudata( L, 1, "vlc_object" );
- p_this = *p_obj;
- }
- p_result = vlc_object_find( p_this, i_type, i_mode );
- if( !p_result )
- lua_pushnil( L );
- else
- vlclua_push_vlc_object( L, p_result, vlclua_gc_release );
- return 1;
- }
- static int vlclua_object_find_name( lua_State *L )
- {
- const char *psz_name = luaL_checkstring( L, 2 );
- const char *psz_mode = luaL_checkstring( L, 3 );
- vlc_object_t *p_this;
- int i_mode = vlc_object_search_mode_from_string( psz_mode );
- vlc_object_t *p_result;
- if( !i_mode )
- return luaL_error( L, ""%s" is not a valid search mode.",
- psz_mode );
- if( lua_type( L, 1 ) == LUA_TNIL )
- p_this = vlclua_get_this( L );
- else
- {
- vlc_object_t **p_obj = luaL_checkudata( L, 1, "vlc_object" );
- p_this = *p_obj;
- }
- p_result = vlc_object_find_name( p_this, psz_name, i_mode );
- if( !p_result )
- lua_pushnil( L );
- else
- vlclua_push_vlc_object( L, p_result, vlclua_gc_release );
- return 1;
- }
- static int vlclua_get_libvlc( lua_State *L )
- {
- vlclua_push_vlc_object( L, vlclua_get_this( L )->p_libvlc,
- NULL );
- return 1;
- }
- static int vlclua_get_playlist( lua_State *L )
- {
- playlist_t *p_playlist = vlclua_get_playlist_internal( L );
- if( p_playlist )
- {
- vlclua_push_vlc_object( L, p_playlist, vlclua_gc_release );
- }
- else lua_pushnil( L );
- //vlclua_release_playlist_internal( p_playlist );
- return 1;
- }
- static int vlclua_get_input( lua_State *L )
- {
- input_thread_t *p_input = vlclua_get_input_internal( L );
- if( p_input )
- {
- vlclua_push_vlc_object( L, p_input, vlclua_gc_release );
- }
- else lua_pushnil( L );
- return 1;
- }
- /*****************************************************************************
- *
- *****************************************************************************/
- static const luaL_Reg vlclua_object_reg[] = {
- { "input", vlclua_get_input },
- { "playlist", vlclua_get_playlist },
- { "libvlc", vlclua_get_libvlc },
- { "find", vlclua_object_find },
- { "find_name", vlclua_object_find_name },
- { NULL, NULL }
- };
- void luaopen_object( lua_State *L )
- {
- lua_newtable( L );
- luaL_register( L, NULL, vlclua_object_reg );
- lua_setfield( L, -2, "object" );
- }