1 /*****************************************************************************
2 * extension.c: Lua Extensions (meta data, web information, ...)
3 *****************************************************************************
4 * Copyright (C) 2009-2010 VideoLAN and authors
7 * Authors: Jean-Philippe André < jpeg # videolan.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 *****************************************************************************/
26 #include "extension.h"
29 #include <vlc_input.h>
30 #include <vlc_events.h>
32 /* Functions to register */
33 static const luaL_Reg p_reg[] =
39 * Extensions capabilities
40 * Note: #define and ppsz_capabilities must be in sync
42 #define EXT_HAS_MENU (1 << 0) ///< Hook: menu
43 #define EXT_TRIGGER_ONLY (1 << 1) ///< Hook: trigger. Not activable
44 #define EXT_INPUT_LISTENER (1 << 2) ///< Hook: input_changed
45 #define EXT_META_LISTENER (1 << 3) ///< Hook: meta_changed
47 const char* const ppsz_capabilities[] = {
55 static int ScanExtensions( extensions_manager_t *p_this );
56 static int ScanLuaCallback( vlc_object_t *p_this, const char *psz_script,
58 static int Control( extensions_manager_t *, int, va_list );
59 static int GetMenuEntries( extensions_manager_t *p_mgr, extension_t *p_ext,
60 char ***pppsz_titles, uint16_t **ppi_ids );
61 static lua_State* GetLuaState( extensions_manager_t *p_mgr,
63 static int TriggerMenu( extension_t *p_ext, int id );
64 static int TriggerExtension( extensions_manager_t *p_mgr,
67 int vlclua_extension_deactivate( lua_State *L );
70 static int vlclua_extension_dialog_callback( vlc_object_t *p_this,
76 /* Input item callback: vlc_InputItemMetaChanged */
77 static void inputItemMetaChanged( const vlc_event_t *p_event,
84 int Open_Extension( vlc_object_t *p_this )
86 msg_Dbg( p_this, "Opening EXPERIMENTAL Lua Extension module" );
88 extensions_manager_t *p_mgr = ( extensions_manager_t* ) p_this;
90 p_mgr->pf_control = Control;
92 extensions_manager_sys_t *p_sys = ( extensions_manager_sys_t* )
93 calloc( 1, sizeof( extensions_manager_sys_t ) );
94 if( !p_sys ) return VLC_ENOMEM;
97 ARRAY_INIT( p_sys->activated_extensions );
98 ARRAY_INIT( p_mgr->extensions );
99 vlc_mutex_init( &p_mgr->lock );
100 vlc_mutex_init( &p_mgr->p_sys->lock );
102 /* Scan available Lua Extensions */
103 if( ScanExtensions( p_mgr ) != VLC_SUCCESS )
105 msg_Err( p_mgr, "Can't load extensions modules" );
109 // Create the dialog-event variable
110 var_Create( p_this, "dialog-event", VLC_VAR_ADDRESS );
111 var_AddCallback( p_this, "dialog-event",
112 vlclua_extension_dialog_callback, NULL );
118 * Module unload function
120 void Close_Extension( vlc_object_t *p_this )
122 extensions_manager_t *p_mgr = ( extensions_manager_t* ) p_this;
123 msg_Dbg( p_mgr, "Deactivating all loaded extensions" );
125 vlc_mutex_lock( &p_mgr->lock );
126 p_mgr->p_sys->b_killed = true;
127 vlc_mutex_unlock( &p_mgr->lock );
129 var_Destroy( p_mgr, "dialog-event" );
131 extension_t *p_ext = NULL;
132 FOREACH_ARRAY( p_ext, p_mgr->p_sys->activated_extensions )
135 msg_Dbg( p_mgr, "Deactivating '%s'", p_ext->psz_title );
136 Deactivate( p_mgr, p_ext );
137 WaitForDeactivation( p_ext );
141 msg_Dbg( p_mgr, "All extensions are now deactivated" );
142 ARRAY_RESET( p_mgr->p_sys->activated_extensions );
144 vlc_mutex_destroy( &p_mgr->lock );
145 vlc_mutex_destroy( &p_mgr->p_sys->lock );
146 free( p_mgr->p_sys );
149 /* Free extensions' memory */
150 FOREACH_ARRAY( p_ext, p_mgr->extensions )
154 if( p_ext->p_sys->L )
155 lua_close( p_ext->p_sys->L );
156 free( p_ext->psz_name );
157 free( p_ext->psz_title );
158 free( p_ext->psz_author );
159 free( p_ext->psz_description );
160 free( p_ext->psz_shortdescription );
161 free( p_ext->psz_url );
162 free( p_ext->psz_version );
164 vlc_mutex_destroy( &p_ext->p_sys->running_lock );
165 vlc_mutex_destroy( &p_ext->p_sys->command_lock );
166 vlc_cond_destroy( &p_ext->p_sys->wait );
168 free( p_ext->p_sys );
173 ARRAY_RESET( p_mgr->extensions );
177 * Batch scan all Lua files in folder "extensions"
178 * @param p_mgr This extensions_manager_t object
180 static int ScanExtensions( extensions_manager_t *p_mgr )
184 vlclua_scripts_batch_execute( VLC_OBJECT( p_mgr ),
196 * Batch scan all Lua files in folder "extensions": callback
197 * @param p_this This extensions_manager_t object
198 * @param psz_script Name of the script to run
199 * @param L Lua State, common to all scripts here
200 * @param pb_continue bool* that indicates whether to continue batch or not
202 int ScanLuaCallback( vlc_object_t *p_this, const char *psz_script,
205 extensions_manager_t *p_mgr = ( extensions_manager_t* ) p_this;
208 msg_Dbg( p_mgr, "Scanning Lua script %s", psz_script );
210 vlc_mutex_lock( &p_mgr->lock );
212 /* Create new script descriptor */
213 extension_t *p_ext = ( extension_t* ) calloc( 1, sizeof( extension_t ) );
216 vlc_mutex_unlock( &p_mgr->lock );
220 p_ext->psz_name = strdup( psz_script );
221 p_ext->p_sys = (extension_sys_t*) calloc( 1, sizeof( extension_sys_t ) );
222 if( !p_ext->p_sys || !p_ext->psz_name )
224 free( p_ext->psz_name );
225 free( p_ext->p_sys );
227 vlc_mutex_unlock( &p_mgr->lock );
230 p_ext->p_sys->p_mgr = p_mgr;
232 /* Mutexes and conditions */
233 vlc_mutex_init( &p_ext->p_sys->command_lock );
234 vlc_mutex_init( &p_ext->p_sys->running_lock );
235 vlc_cond_init( &p_ext->p_sys->wait );
237 /* Load and run the script(s) */
238 lua_State *L = luaL_newstate();
239 if( luaL_dofile( L, psz_script ) )
241 msg_Warn( p_mgr, "Error loading script %s: %s", psz_script,
242 lua_tostring( L, lua_gettop( L ) ) );
247 /* Scan script for capabilities */
248 lua_getglobal( L, "descriptor" );
250 if( !lua_isfunction( L, -1 ) )
252 msg_Warn( p_mgr, "Error while runing script %s, "
253 "function descriptor() not found", psz_script );
257 if( lua_pcall( L, 0, 1, 0 ) )
259 msg_Warn( p_mgr, "Error while runing script %s, "
260 "function descriptor(): %s", psz_script,
261 lua_tostring( L, lua_gettop( L ) ) );
265 if( lua_gettop( L ) )
267 if( lua_istable( L, -1 ) )
270 lua_getfield( L, -1, "capabilities" );
271 if( lua_istable( L, -1 ) )
274 while( lua_next( L, -2 ) != 0 )
276 /* Key is at index -2 and value at index -1. Discard key */
277 const char *psz_cap = luaL_checkstring( L, -1 );
280 /* Find this capability's flag */
281 for( const char *iter = *ppsz_capabilities;
283 iter = ppsz_capabilities[ ++i_cap ])
285 if( !strcmp( iter, psz_cap ) )
288 p_ext->p_sys->i_capabilities |= 1 << i_cap;
295 msg_Warn( p_mgr, "Extension capability '%s' unknown in"
296 " script %s", psz_cap, psz_script );
298 /* Removes 'value'; keeps 'key' for next iteration */
304 msg_Warn( p_mgr, "In script %s, function descriptor() "
305 "did not return a table of capabilities.",
311 lua_getfield( L, -1, "title" );
312 if( lua_isstring( L, -1 ) )
314 p_ext->psz_title = strdup( luaL_checkstring( L, -1 ) );
318 msg_Dbg( p_mgr, "In script %s, function descriptor() "
319 "did not return a string as title.",
321 p_ext->psz_title = strdup( psz_script );
326 lua_getfield( L, -1, "author" );
327 if( lua_isstring( L, -1 ) )
329 p_ext->psz_author = strdup( luaL_checkstring( L, -1 ) );
333 p_ext->psz_author = NULL;
337 /* Get description */
338 lua_getfield( L, -1, "description" );
339 if( lua_isstring( L, -1 ) )
341 p_ext->psz_description = strdup( luaL_checkstring( L, -1 ) );
345 p_ext->psz_description = NULL;
349 /* Get short description */
350 lua_getfield( L, -1, "shortdesc" );
351 if( lua_isstring( L, -1 ) )
353 p_ext->psz_shortdescription = strdup( luaL_checkstring( L, -1 ) );
357 p_ext->psz_shortdescription = NULL;
362 lua_getfield( L, -1, "url" );
363 if( lua_isstring( L, -1 ) )
365 p_ext->psz_url = strdup( luaL_checkstring( L, -1 ) );
369 p_ext->psz_url = NULL;
374 lua_getfield( L, -1, "version" );
375 if( lua_isstring( L, -1 ) )
377 p_ext->psz_version = strdup( luaL_checkstring( L, -1 ) );
381 p_ext->psz_version = NULL;
387 msg_Warn( p_mgr, "In script %s, function descriptor() "
388 "did not return a table!", psz_script );
394 msg_Err( p_mgr, "Script %s went completely foobar", psz_script );
398 msg_Dbg( p_mgr, "Script %s has the following capability flags: 0x%x",
399 psz_script, p_ext->p_sys->i_capabilities );
406 free( p_ext->psz_name );
407 free( p_ext->psz_title );
408 free( p_ext->psz_url );
409 free( p_ext->psz_author );
410 free( p_ext->psz_description );
411 free( p_ext->psz_shortdescription );
412 free( p_ext->psz_version );
413 vlc_mutex_destroy( &p_ext->p_sys->command_lock );
414 vlc_mutex_destroy( &p_ext->p_sys->running_lock );
415 vlc_cond_destroy( &p_ext->p_sys->wait );
416 free( p_ext->p_sys );
421 /* Add the extension to the list of known extensions */
422 ARRAY_APPEND( p_mgr->extensions, p_ext );
425 vlc_mutex_unlock( &p_mgr->lock );
426 /* Continue batch execution */
427 return pb_continue ? ( (* (bool*)pb_continue) ? -1 : 0 ) : -1;
430 static int Control( extensions_manager_t *p_mgr, int i_control, va_list args )
432 extension_t *p_ext = NULL;
434 uint16_t **ppus = NULL;
435 char ***pppsz = NULL;
440 case EXTENSION_ACTIVATE:
441 p_ext = ( extension_t* ) va_arg( args, extension_t* );
442 return Activate( p_mgr, p_ext );
444 case EXTENSION_DEACTIVATE:
445 p_ext = ( extension_t* ) va_arg( args, extension_t* );
446 return Deactivate( p_mgr, p_ext );
448 case EXTENSION_IS_ACTIVATED:
449 p_ext = ( extension_t* ) va_arg( args, extension_t* );
450 pb = ( bool* ) va_arg( args, bool* );
451 *pb = IsActivated( p_mgr, p_ext );
454 case EXTENSION_HAS_MENU:
455 p_ext = ( extension_t* ) va_arg( args, extension_t* );
456 pb = ( bool* ) va_arg( args, bool* );
457 *pb = ( p_ext->p_sys->i_capabilities & EXT_HAS_MENU ) ? 1 : 0;
460 case EXTENSION_GET_MENU:
461 p_ext = ( extension_t* ) va_arg( args, extension_t* );
462 pppsz = ( char*** ) va_arg( args, char*** );
463 ppus = ( uint16_t** ) va_arg( args, uint16_t** );
464 return GetMenuEntries( p_mgr, p_ext, pppsz, ppus );
466 case EXTENSION_TRIGGER_ONLY:
467 p_ext = ( extension_t* ) va_arg( args, extension_t* );
468 pb = ( bool* ) va_arg( args, bool* );
469 *pb = ( p_ext->p_sys->i_capabilities & EXT_TRIGGER_ONLY ) ? 1 : 0;
472 case EXTENSION_TRIGGER:
473 p_ext = ( extension_t* ) va_arg( args, extension_t* );
474 return TriggerExtension( p_mgr, p_ext );
476 case EXTENSION_TRIGGER_MENU:
477 p_ext = ( extension_t* ) va_arg( args, extension_t* );
478 // GCC: 'uint16_t' is promoted to 'int' when passed through '...'
479 i = ( int ) va_arg( args, int );
480 return TriggerMenu( p_ext, i );
482 case EXTENSION_SET_INPUT:
484 p_ext = ( extension_t* ) va_arg( args, extension_t* );
485 input_thread_t *p_input = va_arg( args, struct input_thread_t * );
487 if( !LockExtension( p_ext ) )
491 input_thread_t *old = p_ext->p_sys->p_input;
492 input_item_t *p_item;
495 // Untrack meta fetched events
496 if( p_ext->p_sys->i_capabilities & EXT_META_LISTENER )
498 p_item = input_GetItem( old );
499 vlc_event_detach( &p_item->event_manager,
500 vlc_InputItemMetaChanged,
501 inputItemMetaChanged,
503 vlc_gc_decref( p_item );
505 vlc_object_release( old );
508 p_ext->p_sys->p_input = p_input ? vlc_object_hold( p_input )
511 // Tell the script the input changed
512 if( p_ext->p_sys->i_capabilities & EXT_INPUT_LISTENER )
514 PushCommandUnique( p_ext, CMD_SET_INPUT );
517 // Track meta fetched events
518 if( p_ext->p_sys->p_input &&
519 p_ext->p_sys->i_capabilities & EXT_META_LISTENER )
521 p_item = input_GetItem( p_ext->p_sys->p_input );
522 vlc_gc_incref( p_item );
523 vlc_event_attach( &p_item->event_manager,
524 vlc_InputItemMetaChanged,
525 inputItemMetaChanged,
529 UnlockExtension( p_ext );
534 msg_Warn( p_mgr, "Control '%d' not yet implemented in Extension",
542 int lua_ExtensionActivate( extensions_manager_t *p_mgr, extension_t *p_ext )
544 assert( p_mgr != NULL && p_ext != NULL );
545 return lua_ExecuteFunction( p_mgr, p_ext, "activate", LUA_END );
548 int lua_ExtensionDeactivate( extensions_manager_t *p_mgr, extension_t *p_ext )
550 assert( p_mgr != NULL && p_ext != NULL );
552 if( !p_ext->p_sys->L )
555 // Unset and release input objects
556 if( p_ext->p_sys->p_input )
558 if( p_ext->p_sys->i_capabilities & EXT_META_LISTENER )
561 input_item_t *p_item = input_GetItem( p_ext->p_sys->p_input );
562 vlc_gc_decref( p_item );
564 vlc_object_release( p_ext->p_sys->p_input );
567 int i_ret = lua_ExecuteFunction( p_mgr, p_ext, "deactivate", LUA_END );
569 /* Clear Lua State */
570 lua_close( p_ext->p_sys->L );
571 p_ext->p_sys->L = NULL;
576 int lua_ExtensionWidgetClick( extensions_manager_t *p_mgr,
578 extension_widget_t *p_widget )
580 if( !p_ext->p_sys->L )
583 return lua_ExecuteFunction( p_mgr, p_ext, (const char*) p_widget->p_sys, LUA_END );
588 * Get the list of menu entries from an extension script
591 * @param pppsz_titles Pointer to NULL. All strings must be freed by the caller
592 * @param ppi_ids Pointer to NULL. Must be feed by the caller.
593 * @note This function is allowed to run in the UI thread. This means
594 * that it MUST respond very fast.
595 * @todo Remove the menu() hook and provide a new function vlc.set_menu()
597 static int GetMenuEntries( extensions_manager_t *p_mgr, extension_t *p_ext,
598 char ***pppsz_titles, uint16_t **ppi_ids )
600 assert( *pppsz_titles == NULL );
601 assert( *ppi_ids == NULL );
603 if( !IsActivated( p_mgr, p_ext ) )
605 msg_Dbg( p_mgr, "Can't get menu before activating the extension!" );
609 if( !LockExtension( p_ext ) )
611 /* Dying extension, fail. */
615 int i_ret = VLC_EGENERIC;
616 lua_State *L = GetLuaState( p_mgr, p_ext );
618 if( ( p_ext->p_sys->i_capabilities & EXT_HAS_MENU ) == 0 )
620 msg_Dbg( p_mgr, "can't get a menu from an extension without menu!" );
624 lua_getglobal( L, "menu" );
626 if( !lua_isfunction( L, -1 ) )
628 msg_Warn( p_mgr, "Error while runing script %s, "
629 "function menu() not found", p_ext->psz_name );
633 if( lua_pcall( L, 0, 1, 0 ) )
635 msg_Warn( p_mgr, "Error while runing script %s, "
636 "function menu(): %s", p_ext->psz_name,
637 lua_tostring( L, lua_gettop( L ) ) );
641 if( lua_gettop( L ) )
643 if( lua_istable( L, -1 ) )
646 size_t i_size = lua_objlen( L, -1 );
647 *pppsz_titles = ( char** ) calloc( i_size+1, sizeof( char* ) );
648 *ppi_ids = ( uint16_t* ) calloc( i_size+1, sizeof( uint16_t ) );
653 while( lua_next( L, -2 ) != 0 )
655 assert( i_idx < i_size );
656 if( (!lua_isstring( L, -1 )) || (!lua_isnumber( L, -2 )) )
658 msg_Warn( p_mgr, "In script %s, an entry in "
659 "the menu table is invalid!", p_ext->psz_name );
662 (*pppsz_titles)[ i_idx ] = strdup( luaL_checkstring( L, -1 ) );
663 (*ppi_ids)[ i_idx ] = (uint16_t) ( luaL_checkinteger( L, -2 ) & 0xFFFF );
670 msg_Warn( p_mgr, "Function menu() in script %s "
671 "did not return a table", p_ext->psz_name );
677 msg_Warn( p_mgr, "Script %s went completely foobar", p_ext->psz_name );
684 UnlockExtension( p_ext );
685 if( i_ret != VLC_SUCCESS )
687 msg_Dbg( p_mgr, "Something went wrong in %s (%s:%d)",
688 __func__, __FILE__, __LINE__ );
693 /* Must be entered with the Lock on Extension */
694 static lua_State* GetLuaState( extensions_manager_t *p_mgr,
706 msg_Err( p_mgr, "Could not create new Lua State" );
710 luaL_register( L, "vlc", p_reg );
713 lua_pushlightuserdata( L, p_mgr );
714 lua_setfield( L, -2, "private" );
716 lua_pushlightuserdata( L, p_ext );
717 lua_setfield( L, -2, "extension" );
721 /* Load more libraries */
724 luaopen_dialog( L, p_ext );
731 luaopen_playlist( L );
734 luaopen_strings( L );
735 luaopen_variables( L );
741 /* Register extension specific functions */
742 lua_getglobal( L, "vlc" );
743 lua_pushcfunction( L, vlclua_extension_deactivate );
744 lua_setfield( L, -2, "deactivate" );
746 /* Setup the module search path */
747 if( vlclua_add_modules_path( p_mgr, L, p_ext->psz_name ) )
749 msg_Warn( p_mgr, "Error while setting the module search path for %s", p_ext->psz_name );
753 /* Load and run the script(s) */
754 if( luaL_dofile( L, p_ext->psz_name ) != 0 )
756 msg_Warn( p_mgr, "Error loading script %s: %s", p_ext->psz_name,
757 lua_tostring( L, lua_gettop( L ) ) );
768 msg_Dbg( p_mgr, "Reusing old Lua state for extension '%s'",
776 int lua_ExecuteFunction( extensions_manager_t *p_mgr, extension_t *p_ext,
777 const char *psz_function, ... )
780 va_start( args, psz_function );
781 int i_ret = lua_ExecuteFunctionVa( p_mgr, p_ext, psz_function, args );
787 * Execute a function in a Lua script
788 * @return < 0 in case of failure, >= 0 in case of success
789 * @note It's better to call this function from a dedicated thread
790 * (see extension_thread.c)
792 int lua_ExecuteFunctionVa( extensions_manager_t *p_mgr, extension_t *p_ext,
793 const char *psz_function, va_list args )
795 int i_ret = VLC_EGENERIC;
797 assert( p_mgr != NULL );
798 assert( p_ext != NULL );
800 lua_State *L = GetLuaState( p_mgr, p_ext );
801 lua_getglobal( L, psz_function );
803 if( !lua_isfunction( L, -1 ) )
805 msg_Warn( p_mgr, "Error while runing script %s, "
806 "function %s() not found", p_ext->psz_name, psz_function );
810 lua_datatype_e type = LUA_END;
811 while( ( type = va_arg( args, int ) ) != LUA_END )
813 if( type == LUA_NUM )
815 lua_pushnumber( L , ( int ) va_arg( args, int ) );
817 else if( type == LUA_TEXT )
819 lua_pushstring( L , ( char * ) va_arg( args, char* ) );
823 msg_Warn( p_mgr, "Undefined argument type %d to lua function %s"
824 "from script %s", type, psz_function, p_ext->psz_name );
829 if( lua_pcall( L, i_args, 1, 0 ) )
831 msg_Warn( p_mgr, "Error while runing script %s, "
832 "function %s(): %s", p_ext->psz_name, psz_function,
833 lua_tostring( L, lua_gettop( L ) ) );
837 i_ret = lua_DialogFlush( L );
843 static inline int TriggerMenu( extension_t *p_ext, int i_id )
845 return PushCommand( p_ext, CMD_TRIGGERMENU, i_id );
848 int lua_ExtensionTriggerMenu( extensions_manager_t *p_mgr,
849 extension_t *p_ext, int id )
851 int i_ret = VLC_EGENERIC;
852 lua_State *L = GetLuaState( p_mgr, p_ext );
857 luaopen_dialog( L, p_ext );
859 lua_getglobal( L, "trigger_menu" );
860 if( !lua_isfunction( L, -1 ) )
862 msg_Warn( p_mgr, "Error while runing script %s, "
863 "function trigger_menu() not found", p_ext->psz_name );
867 /* Pass id as unique argument to the function */
868 lua_pushinteger( L, id );
870 if( lua_pcall( L, 1, 1, 0 ) != 0 )
872 msg_Warn( p_mgr, "Error while runing script %s, "
873 "function trigger_menu(): %s", p_ext->psz_name,
874 lua_tostring( L, lua_gettop( L ) ) );
878 i_ret = lua_DialogFlush( L );
879 if( i_ret < VLC_SUCCESS )
881 msg_Dbg( p_mgr, "Something went wrong in %s (%s:%d)",
882 __func__, __FILE__, __LINE__ );
887 /** Directly trigger an extension, without activating it
888 * This is NOT multithreaded, and this code runs in the UI thread
890 * @param p_ext Extension to trigger
891 * @return Value returned by the lua function "trigger"
893 static int TriggerExtension( extensions_manager_t *p_mgr,
896 int i_ret = lua_ExecuteFunction( p_mgr, p_ext, "trigger", LUA_END );
898 /* Close lua state for trigger-only extensions */
899 if( p_ext->p_sys->L )
900 lua_close( p_ext->p_sys->L );
901 p_ext->p_sys->L = NULL;
906 /** Retrieve extension associated to the current script
907 * @param L current lua_State
908 * @return Lua userdata "vlc.extension"
910 extension_t *vlclua_extension_get( lua_State *L )
912 extension_t *p_ext = NULL;
913 lua_getglobal( L, "vlc" );
914 lua_getfield( L, -1, "extension" );
915 p_ext = (extension_t*) lua_topointer( L, lua_gettop( L ) );
920 /** Deactivate an extension by order from the extension itself
922 * @note This is an asynchronous call. A script calling vlc.deactivate() will
923 * be executed to the end before the last call to deactivate() is done.
925 int vlclua_extension_deactivate( lua_State *L )
927 extension_t *p_ext = vlclua_extension_get( L );
928 int i_ret = Deactivate( p_ext->p_sys->p_mgr, p_ext );
929 return ( i_ret == VLC_SUCCESS ) ? 1 : 0;
932 /** Callback for the variable "dialog-event"
933 * @param p_this Current object owner of the extension and the dialog
934 * @param psz_var "dialog-event"
935 * @param oldval Unused
936 * @param newval Address of the dialog
937 * @param p_data Unused
939 static int vlclua_extension_dialog_callback( vlc_object_t *p_this,
945 /* psz_var == "dialog-event" */
950 extension_dialog_command_t *command = newval.p_address;
951 assert( command != NULL );
952 assert( command->p_dlg != NULL);
954 extension_t *p_ext = command->p_dlg->p_sys;
955 assert( p_ext != NULL );
957 extension_widget_t *p_widget = command->p_data;
959 switch( command->event )
961 case EXTENSION_EVENT_CLICK:
962 assert( p_widget != NULL );
963 PushCommand( p_ext, CMD_CLICK, p_widget );
965 case EXTENSION_EVENT_CLOSE:
966 PushCommandUnique( p_ext, CMD_CLOSE );
969 msg_Dbg( p_this, "Received unknown UI event %d, discarded",
977 /** Callback on vlc_InputItemMetaChanged event
979 static void inputItemMetaChanged( const vlc_event_t *p_event,
982 assert( p_event && p_event->type == vlc_InputItemMetaChanged );
984 extension_t *p_ext = ( extension_t* ) data;
985 assert( p_ext != NULL );
987 PushCommandUnique( p_ext, CMD_UPDATE_META );
990 /* Lock this extension. Can fail. */
991 bool LockExtension( extension_t *p_ext )
993 if( p_ext->p_sys->b_exiting )
996 vlc_mutex_lock( &p_ext->p_sys->running_lock );
997 if( p_ext->p_sys->b_exiting )
999 vlc_mutex_unlock( &p_ext->p_sys->running_lock );
1006 void UnlockExtension( extension_t *p_ext )
1008 vlc_mutex_unlock( &p_ext->p_sys->running_lock );