meta.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:6k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * meta.c: Get meta/artwork using lua scripts
- *****************************************************************************
- * Copyright (C) 2007-2008 the VideoLAN team
- * $Id: 733f2b73b771df3d66d545b7766361713189cafc $
- *
- * Authors: Antoine Cellerier <dionoea at videolan tod org>
- * Pierre d'Herbemont <pdherbemont # videolan.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 <vlc_input.h>
- #include <vlc_playlist.h>
- #include <vlc_meta.h>
- #include <vlc_url.h>
- #include <vlc_strings.h>
- #include <vlc_stream.h>
- #include <vlc_charset.h>
- #include "vlc.h"
- #include "libs.h"
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int fetch_art( vlc_object_t *p_this, const char * psz_filename,
- lua_State * L, void * user_data );
- static lua_State *vlclua_meta_init( vlc_object_t *p_this,
- input_item_t * p_item );
- /*****************************************************************************
- * Init lua
- *****************************************************************************/
- static const luaL_Reg p_reg[] = { { NULL, NULL } };
- static lua_State * vlclua_meta_init( vlc_object_t *p_this, input_item_t * p_item )
- {
- lua_State * L = luaL_newstate();
- if( !L )
- {
- msg_Err( p_this, "Could not create new Lua State" );
- return NULL;
- }
- char *psz_meta;
- /* Load Lua libraries */
- luaL_openlibs( L ); /* XXX: Don't open all the libs? */
- luaL_register( L, "vlc", p_reg );
- luaopen_msg( L );
- luaopen_stream( L );
- luaopen_strings( L );
- luaopen_variables( L );
- luaopen_object( L );
- luaopen_misc( L );
- lua_pushlightuserdata( L, p_this );
- lua_setfield( L, -2, "private" );
- psz_meta = input_item_GetName( p_item );
- lua_pushstring( L, psz_meta );
- lua_setfield( L, -2, "name" );
- free( psz_meta );
- psz_meta = input_item_GetArtist( p_item );
- lua_pushstring( L, psz_meta );
- lua_setfield( L, -2, "artist" );
- free( psz_meta );
- psz_meta = input_item_GetTitle( p_item ) ;
- lua_pushstring( L, psz_meta );
- lua_setfield( L, -2, "title" );
- free( psz_meta );
- psz_meta = input_item_GetAlbum( p_item );
- lua_pushstring( L, psz_meta );
- lua_setfield( L, -2, "album" );
- free( psz_meta );
- psz_meta = input_item_GetArtURL( p_item );
- lua_pushstring( L, psz_meta );
- lua_setfield( L, -2, "arturl" );
- free( psz_meta );
- /* XXX: all should be passed ( could use macro ) */
- return L;
- }
- /*****************************************************************************
- * Called through lua_scripts_batch_execute to call 'fetch_art' on the script
- * pointed by psz_filename.
- *****************************************************************************/
- static int fetch_art( vlc_object_t *p_this, const char * psz_filename,
- lua_State * L, void * user_data )
- {
- int i_ret = VLC_EGENERIC;
- input_item_t * p_input = user_data;
- int s;
- /* Ugly hack to delete previous versions of the fetchart()
- * functions. */
- lua_pushnil( L );
- lua_setglobal( L, "fetch_art" );
- /* Load and run the script(s) */
- if( luaL_dofile( L, psz_filename ) )
- {
- msg_Warn( p_this, "Error loading script %s: %s", psz_filename,
- lua_tostring( L, lua_gettop( L ) ) );
- lua_pop( L, 1 );
- return VLC_EGENERIC;
- }
- lua_getglobal( L, "fetch_art" );
- if( !lua_isfunction( L, lua_gettop( L ) ) )
- {
- msg_Warn( p_this, "Error while runing script %s, "
- "function fetch_art() not found", psz_filename );
- lua_pop( L, 1 );
- return VLC_EGENERIC;
- }
- if( lua_pcall( L, 0, 1, 0 ) )
- {
- msg_Warn( p_this, "Error while runing script %s, "
- "function fetch_art(): %s", psz_filename,
- lua_tostring( L, lua_gettop( L ) ) );
- lua_pop( L, 1 );
- return VLC_EGENERIC;
- }
- if((s = lua_gettop( L )))
- {
- const char * psz_value;
- if( lua_isstring( L, s ) )
- {
- psz_value = lua_tostring( L, s );
- if( psz_value && *psz_value != 0 )
- {
- lua_Dbg( p_this, "setting arturl: %s", psz_value );
- input_item_SetArtURL ( p_input, psz_value );
- i_ret = VLC_SUCCESS;
- }
- }
- else if( !lua_isnil( L, s ) )
- {
- msg_Err( p_this, "Lua art fetcher script %s: "
- "didn't return a string", psz_filename );
- }
- }
- else
- {
- msg_Err( p_this, "Script went completely foobar" );
- }
- return i_ret;
- }
- /*****************************************************************************
- * Module entry point for art.
- *****************************************************************************/
- int FindArt( vlc_object_t *p_this )
- {
- playlist_t *p_playlist = pl_Hold( p_this );
- if( !p_playlist )
- return VLC_EGENERIC;
- input_item_t *p_item = (input_item_t *)p_this->p_private;
- lua_State *L = vlclua_meta_init( p_this, p_item );
- int i_ret = vlclua_scripts_batch_execute( p_this, "meta", &fetch_art, L, p_item );
- lua_close( L );
- pl_Release( p_this );
- return i_ret;
- }