vlc.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:18k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * vlc.c: Generic lua interface functions
- *****************************************************************************
- * Copyright (C) 2007-2008 the VideoLAN team
- * $Id: f59c3914804be31342b12d24ae23598c4a23875c $
- *
- * 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 <assert.h>
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_meta.h>
- #include <vlc_charset.h>
- #include <vlc_aout.h>
- #include <lua.h> /* Low level lua C API */
- #include <lauxlib.h> /* Higher level C API */
- #include <lualib.h> /* Lua libs */
- #include "vlc.h"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define INTF_TEXT N_("Lua interface")
- #define INTF_LONGTEXT N_("Lua interface module to load")
- #define CONFIG_TEXT N_("Lua interface configuration")
- #define CONFIG_LONGTEXT N_("Lua interface configuration string. Format is: '["<interface module name>"] = { <option> = <value>, ...}, ...'.")
- vlc_module_begin ()
- set_shortname( N_( "Lua Art" ) )
- set_description( N_("Fetch artwork using lua scripts") )
- set_capability( "art finder", 10 )
- set_callbacks( FindArt, NULL )
- add_submodule ()
- add_shortcut( "luaplaylist" )
- set_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_DEMUX )
- set_shortname( N_("Lua Playlist") )
- set_description( N_("Lua Playlist Parser Interface") )
- set_capability( "demux", 2 )
- set_callbacks( Import_LuaPlaylist, Close_LuaPlaylist )
- add_submodule ()
- add_shortcut( "luaintf" )
- add_shortcut( "luarc" )
- /* add_shortcut( "rc" ) */
- add_shortcut( "luahotkeys" )
- /* add_shortcut( "hotkeys" ) */
- add_shortcut( "luatelnet" )
- /* add_shortcut( "telnet" ) */
- add_shortcut( "luahttp" )
- /* add_shortcut( "http" ) */
- set_description( N_("Lua Interface Module") )
- set_capability( "interface", 0 )
- add_string( "lua-intf", "dummy", NULL,
- INTF_TEXT, INTF_LONGTEXT, false )
- add_string( "lua-config", "", NULL,
- CONFIG_TEXT, CONFIG_LONGTEXT, false )
- set_callbacks( Open_LuaIntf, Close_LuaIntf )
- vlc_module_end ()
- /*****************************************************************************
- *
- *****************************************************************************/
- static int file_select( const char *file )
- {
- int i = strlen( file );
- return i > 4 && !strcmp( file+i-4, ".lua" );
- }
- static int file_compare( const char **a, const char **b )
- {
- return strcmp( *a, *b );
- }
- int vlclua_dir_list( const char *luadirname, char **ppsz_dir_list )
- {
- int i = 0;
- char *datadir = config_GetUserDataDir();
- if( datadir == NULL )
- return VLC_ENOMEM;
- if( asprintf( &ppsz_dir_list[i], "%s" DIR_SEP "lua" DIR_SEP "%s",
- datadir, luadirname ) < 0 )
- {
- free( datadir );
- return VLC_ENOMEM;
- }
- free( datadir );
- i++;
- # if defined(__APPLE__) || defined(SYS_BEOS) || defined(WIN32)
- {
- const char *psz_vlcpath = config_GetDataDir();
- if( asprintf( &ppsz_dir_list[i], "%s" DIR_SEP "lua" DIR_SEP "%s",
- psz_vlcpath, luadirname ) < 0 )
- return VLC_ENOMEM;
- i++;
- if( asprintf( &ppsz_dir_list[i], "%s" DIR_SEP "share" DIR_SEP "lua" DIR_SEP "%s",
- psz_vlcpath, luadirname ) < 0 )
- return VLC_ENOMEM;
- i++;
- }
- # else
- if( asprintf( &ppsz_dir_list[i], "%s" DIR_SEP "lua" DIR_SEP "%s",
- config_GetDataDir (), luadirname ) < 0 )
- return VLC_ENOMEM;
- i++;
- # endif
- return VLC_SUCCESS;
- }
- void vlclua_dir_list_free( char **ppsz_dir_list )
- {
- char **ppsz_dir;
- for( ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
- free( *ppsz_dir );
- }
- /*****************************************************************************
- * Will execute func on all scripts in luadirname, and stop if func returns
- * success.
- *****************************************************************************/
- int vlclua_scripts_batch_execute( vlc_object_t *p_this,
- const char * luadirname,
- int (*func)(vlc_object_t *, const char *, lua_State *, void *),
- lua_State * L,
- void * user_data)
- {
- int i_ret = VLC_EGENERIC;
- char **ppsz_filelist = NULL;
- char **ppsz_fileend = NULL;
- char **ppsz_file;
- char *ppsz_dir_list[] = { NULL, NULL, NULL, NULL };
- char **ppsz_dir;
- i_ret = vlclua_dir_list( luadirname, ppsz_dir_list );
- if( i_ret != VLC_SUCCESS )
- return i_ret;
- i_ret = VLC_EGENERIC;
- for( ppsz_dir = ppsz_dir_list; *ppsz_dir; ppsz_dir++ )
- {
- int i_files;
- if( ppsz_filelist )
- {
- for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend;
- ppsz_file++ )
- free( *ppsz_file );
- free( ppsz_filelist );
- ppsz_filelist = NULL;
- }
- msg_Dbg( p_this, "Trying Lua scripts in %s", *ppsz_dir );
- i_files = utf8_scandir( *ppsz_dir, &ppsz_filelist, file_select,
- file_compare );
- if( i_files < 1 ) continue;
- ppsz_fileend = ppsz_filelist + i_files;
- for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend; ppsz_file++ )
- {
- char *psz_filename;
- if( asprintf( &psz_filename,
- "%s" DIR_SEP "%s", *ppsz_dir, *ppsz_file ) < 0)
- {
- vlclua_dir_list_free( ppsz_dir_list );
- return VLC_ENOMEM;
- }
- msg_Dbg( p_this, "Trying Lua playlist script %s", psz_filename );
- i_ret = func( p_this, psz_filename, L, user_data );
- free( psz_filename );
- if( i_ret == VLC_SUCCESS ) break;
- }
- if( i_ret == VLC_SUCCESS ) break;
- }
- if( ppsz_filelist )
- {
- for( ppsz_file = ppsz_filelist; ppsz_file < ppsz_fileend;
- ppsz_file++ )
- free( *ppsz_file );
- free( ppsz_filelist );
- }
- vlclua_dir_list_free( ppsz_dir_list );
- return i_ret;
- }
- /*****************************************************************************
- * Meta data setters utility.
- * Playlist item table should be on top of the stack when these are called
- *****************************************************************************/
- void __vlclua_read_meta_data( vlc_object_t *p_this, lua_State *L,
- input_item_t *p_input )
- {
- #define TRY_META( a, b )
- lua_getfield( L, -1, a );
- if( lua_isstring( L, -1 ) )
- {
- char *psz_value = strdup( lua_tostring( L, -1 ) );
- EnsureUTF8( psz_value );
- msg_Dbg( p_this, #b ": %s", psz_value );
- input_item_Set ## b ( p_input, psz_value );
- free( psz_value );
- }
- lua_pop( L, 1 ); /* pop a */
- TRY_META( "title", Title );
- TRY_META( "artist", Artist );
- TRY_META( "genre", Genre );
- TRY_META( "copyright", Copyright );
- TRY_META( "album", Album );
- TRY_META( "tracknum", TrackNum );
- TRY_META( "description", Description );
- TRY_META( "rating", Rating );
- TRY_META( "date", Date );
- TRY_META( "setting", Setting );
- TRY_META( "url", URL );
- TRY_META( "language", Language );
- TRY_META( "nowplaying", NowPlaying );
- TRY_META( "publisher", Publisher );
- TRY_META( "encodedby", EncodedBy );
- TRY_META( "arturl", ArtURL );
- TRY_META( "trackid", TrackID );
- }
- void __vlclua_read_custom_meta_data( vlc_object_t *p_this, lua_State *L,
- input_item_t *p_input )
- {
- /* ... item */
- lua_getfield( L, -1, "meta" );
- /* ... item meta */
- if( lua_istable( L, -1 ) )
- {
- lua_pushnil( L );
- /* ... item meta nil */
- while( lua_next( L, -2 ) )
- {
- /* ... item meta key value */
- if( !lua_isstring( L, -2 ) )
- {
- msg_Warn( p_this, "Custom meta data category name must be "
- "a string" );
- }
- else if( !lua_istable( L, -1 ) )
- {
- msg_Warn( p_this, "Custom meta data category contents "
- "must be a table" );
- }
- else
- {
- const char *psz_meta_category = lua_tostring( L, -2 );
- msg_Dbg( p_this, "Found custom meta data category: %s",
- psz_meta_category );
- lua_pushnil( L );
- /* ... item meta key value nil */
- while( lua_next( L, -2 ) )
- {
- /* ... item meta key value key2 value2 */
- if( !lua_isstring( L, -2 ) )
- {
- msg_Warn( p_this, "Custom meta category item name "
- "must be a string." );
- }
- else if( !lua_isstring( L, -1 ) )
- {
- msg_Warn( p_this, "Custom meta category item value "
- "must be a string." );
- }
- else
- {
- const char *psz_meta_name =
- lua_tostring( L, -2 );
- const char *psz_meta_value =
- lua_tostring( L, -1 );
- msg_Dbg( p_this, "Custom meta %s, %s: %s",
- psz_meta_category, psz_meta_name,
- psz_meta_value );
- input_item_AddInfo( p_input, psz_meta_category,
- psz_meta_name, "%s", psz_meta_value );
- }
- lua_pop( L, 1 ); /* pop item */
- /* ... item meta key value key2 */
- }
- /* ... item meta key value */
- }
- lua_pop( L, 1 ); /* pop category */
- /* ... item meta key */
- }
- /* ... item meta */
- }
- lua_pop( L, 1 ); /* pop "meta" */
- /* ... item -> back to original stack */
- }
- /*****************************************************************************
- * Playlist utilities
- ****************************************************************************/
- /**
- * Playlist item table should be on top of the stack when this is called
- */
- void __vlclua_read_options( vlc_object_t *p_this, lua_State *L,
- int *pi_options, char ***pppsz_options )
- {
- lua_getfield( L, -1, "options" );
- if( lua_istable( L, -1 ) )
- {
- lua_pushnil( L );
- while( lua_next( L, -2 ) )
- {
- if( lua_isstring( L, -1 ) )
- {
- char *psz_option = strdup( lua_tostring( L, -1 ) );
- msg_Dbg( p_this, "Option: %s", psz_option );
- INSERT_ELEM( *pppsz_options, *pi_options, *pi_options,
- psz_option );
- }
- else
- {
- msg_Warn( p_this, "Option should be a string" );
- }
- lua_pop( L, 1 ); /* pop option */
- }
- }
- lua_pop( L, 1 ); /* pop "options" */
- }
- int __vlclua_playlist_add_internal( vlc_object_t *p_this, lua_State *L,
- playlist_t *p_playlist,
- input_item_t *p_parent, bool b_play )
- {
- int i_count = 0;
- assert( p_parent || p_playlist );
- /* playlist */
- if( lua_istable( L, -1 ) )
- {
- lua_pushnil( L );
- /* playlist nil */
- while( lua_next( L, -2 ) )
- {
- /* playlist key item */
- /* <Parse playlist item> */
- if( lua_istable( L, -1 ) )
- {
- lua_getfield( L, -1, "path" );
- /* playlist key item path */
- if( lua_isstring( L, -1 ) )
- {
- const char *psz_path = NULL;
- const char *psz_name = NULL;
- char **ppsz_options = NULL;
- int i_options = 0;
- mtime_t i_duration = -1;
- input_item_t *p_input;
- /* Read path and name */
- psz_path = lua_tostring( L, -1 );
- msg_Dbg( p_this, "Path: %s", psz_path );
- lua_getfield( L, -2, "name" );
- /* playlist key item path name */
- if( lua_isstring( L, -1 ) )
- {
- psz_name = lua_tostring( L, -1 );
- msg_Dbg( p_this, "Name: %s", psz_name );
- }
- else
- {
- if( !lua_isnil( L, -1 ) )
- msg_Warn( p_this, "Playlist item name should be a string." );
- psz_name = psz_path;
- }
- /* Read duration */
- lua_getfield( L, -3, "duration" );
- /* playlist key item path name duration */
- if( lua_isnumber( L, -1 ) )
- {
- i_duration = (mtime_t)(lua_tonumber( L, -1 )*1e6);
- }
- else if( !lua_isnil( L, -1 ) )
- {
- msg_Warn( p_this, "Playlist item duration should be a number (in seconds)." );
- }
- lua_pop( L, 1 ); /* pop "duration" */
- /* playlist key item path name */
- /* Read options: item must be on top of stack */
- lua_pushvalue( L, -3 );
- /* playlist key item path name item */
- vlclua_read_options( p_this, L, &i_options, &ppsz_options );
- /* Create input item */
- p_input = input_item_NewExt( p_playlist, psz_path,
- psz_name, i_options,
- (const char **)ppsz_options,
- VLC_INPUT_OPTION_TRUSTED,
- i_duration );
- lua_pop( L, 3 ); /* pop "path name item" */
- /* playlist key item */
- /* Read meta data: item must be on top of stack */
- vlclua_read_meta_data( p_this, L, p_input );
- /* Read custom meta data: item must be on top of stack*/
- vlclua_read_custom_meta_data( p_this, L, p_input );
- /* Append item to playlist */
- if( p_parent ) /* Add to node */
- input_item_AddSubItem( p_parent, p_input );
- else /* Play or Enqueue (preparse) */
- /* FIXME: playlist_AddInput() can fail */
- playlist_AddInput( p_playlist, p_input,
- PLAYLIST_APPEND |
- ( b_play ? PLAYLIST_GO : PLAYLIST_PREPARSE ),
- PLAYLIST_END, true, false );
- i_count ++; /* increment counter */
- vlc_gc_decref( p_input );
- while( i_options > 0 )
- free( ppsz_options[--i_options] );
- free( ppsz_options );
- }
- else
- {
- lua_pop( L, 1 ); /* pop "path" */
- msg_Warn( p_this,
- "Playlist item's path should be a string" );
- }
- /* playlist key item */
- }
- else
- {
- msg_Warn( p_this, "Playlist item should be a table" );
- }
- /* <Parse playlist item> */
- lua_pop( L, 1 ); /* pop the value, keep the key for
- * the next lua_next() call */
- /* playlist key */
- }
- /* playlist */
- }
- else
- {
- msg_Warn( p_this, "Playlist should be a table." );
- }
- return i_count;
- }