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,
57 lua_State *L, void *pb_continue );
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 /* Initialise Lua state structure */
103 lua_State *L = GetLuaState( p_mgr, NULL );
111 /* Scan available Lua Extensions */
112 if( ScanExtensions( p_mgr ) != VLC_SUCCESS )
114 msg_Err( p_mgr, "Can't load extensions modules" );
121 // Create the dialog-event variable
122 var_Create( p_this, "dialog-event", VLC_VAR_ADDRESS );
123 var_AddCallback( p_this, "dialog-event",
124 vlclua_extension_dialog_callback, NULL );
130 * Module unload function
132 void Close_Extension( vlc_object_t *p_this )
134 extensions_manager_t *p_mgr = ( extensions_manager_t* ) p_this;
135 msg_Dbg( p_mgr, "Deactivating all loaded extensions" );
137 vlc_mutex_lock( &p_mgr->lock );
138 p_mgr->p_sys->b_killed = true;
139 vlc_mutex_unlock( &p_mgr->lock );
141 var_Destroy( p_mgr, "dialog-event" );
143 extension_t *p_ext = NULL;
144 FOREACH_ARRAY( p_ext, p_mgr->p_sys->activated_extensions )
147 msg_Dbg( p_mgr, "Deactivating '%s'", p_ext->psz_title );
148 Deactivate( p_mgr, p_ext );
149 WaitForDeactivation( p_ext );
153 msg_Dbg( p_mgr, "All extensions are now deactivated" );
154 ARRAY_RESET( p_mgr->p_sys->activated_extensions );
156 if( p_mgr->p_sys && p_mgr->p_sys->L )
157 lua_close( p_mgr->p_sys->L );
159 vlc_mutex_destroy( &p_mgr->lock );
160 vlc_mutex_destroy( &p_mgr->p_sys->lock );
161 free( p_mgr->p_sys );
164 /* Free extensions' memory */
165 FOREACH_ARRAY( p_ext, p_mgr->extensions )
169 if( p_ext->p_sys->L )
170 lua_close( p_ext->p_sys->L );
171 free( p_ext->psz_name );
172 free( p_ext->psz_title );
173 free( p_ext->psz_author );
174 free( p_ext->psz_description );
175 free( p_ext->psz_shortdescription );
176 free( p_ext->psz_url );
177 free( p_ext->psz_version );
179 vlc_mutex_destroy( &p_ext->p_sys->running_lock );
180 vlc_mutex_destroy( &p_ext->p_sys->command_lock );
181 vlc_cond_destroy( &p_ext->p_sys->wait );
183 free( p_ext->p_sys );
188 ARRAY_RESET( p_mgr->extensions );
192 * Batch scan all Lua files in folder "extensions"
193 * @param p_mgr This extensions_manager_t object
195 static int ScanExtensions( extensions_manager_t *p_mgr )
199 vlclua_scripts_batch_execute( VLC_OBJECT( p_mgr ),
202 p_mgr->p_sys->L, &b_true );
211 * Batch scan all Lua files in folder "extensions": callback
212 * @param p_this This extensions_manager_t object
213 * @param psz_script Name of the script to run
214 * @param L Lua State, common to all scripts here
215 * @param pb_continue bool* that indicates whether to continue batch or not
217 int ScanLuaCallback( vlc_object_t *p_this, const char *psz_script,
218 lua_State *L, void *pb_continue )
220 extensions_manager_t *p_mgr = ( extensions_manager_t* ) p_this;
223 msg_Dbg( p_mgr, "Scanning Lua script %s", psz_script );
225 vlc_mutex_lock( &p_mgr->lock );
227 /* Create new script descriptor */
228 extension_t *p_ext = ( extension_t* ) calloc( 1, sizeof( extension_t ) );
231 vlc_mutex_unlock( &p_mgr->lock );
235 p_ext->psz_name = strdup( psz_script );
236 p_ext->p_sys = (extension_sys_t*) calloc( 1, sizeof( extension_sys_t ) );
237 if( !p_ext->p_sys || !p_ext->psz_name )
239 free( p_ext->psz_name );
240 free( p_ext->p_sys );
242 vlc_mutex_unlock( &p_mgr->lock );
245 p_ext->p_sys->p_mgr = p_mgr;
247 /* Mutexes and conditions */
248 vlc_mutex_init( &p_ext->p_sys->command_lock );
249 vlc_mutex_init( &p_ext->p_sys->running_lock );
250 vlc_cond_init( &p_ext->p_sys->wait );
252 /* Load and run the script(s) */
253 if( luaL_dofile( L, psz_script ) )
255 msg_Warn( p_mgr, "Error loading script %s: %s", psz_script,
256 lua_tostring( L, lua_gettop( L ) ) );
261 /* Scan script for capabilities */
262 lua_getglobal( L, "descriptor" );
264 if( !lua_isfunction( L, -1 ) )
266 msg_Warn( p_mgr, "Error while runing script %s, "
267 "function descriptor() not found", psz_script );
271 if( lua_pcall( L, 0, 1, 0 ) )
273 msg_Warn( p_mgr, "Error while runing script %s, "
274 "function descriptor(): %s", psz_script,
275 lua_tostring( L, lua_gettop( L ) ) );
279 if( lua_gettop( L ) )
281 if( lua_istable( L, -1 ) )
284 lua_getfield( L, -1, "capabilities" );
285 if( lua_istable( L, -1 ) )
288 while( lua_next( L, -2 ) != 0 )
290 /* Key is at index -2 and value at index -1. Discard key */
291 const char *psz_cap = luaL_checkstring( L, -1 );
294 /* Find this capability's flag */
295 for( const char *iter = *ppsz_capabilities;
297 iter = ppsz_capabilities[ ++i_cap ])
299 if( !strcmp( iter, psz_cap ) )
302 p_ext->p_sys->i_capabilities |= 1 << i_cap;
309 msg_Warn( p_mgr, "Extension capability '%s' unknown in"
310 " script %s", psz_cap, psz_script );
312 /* Removes 'value'; keeps 'key' for next iteration */
318 msg_Warn( p_mgr, "In script %s, function descriptor() "
319 "did not return a table of capabilities.",
325 lua_getfield( L, -1, "title" );
326 if( lua_isstring( L, -1 ) )
328 p_ext->psz_title = strdup( luaL_checkstring( L, -1 ) );
332 msg_Dbg( p_mgr, "In script %s, function descriptor() "
333 "did not return a string as title.",
335 p_ext->psz_title = strdup( psz_script );
340 lua_getfield( L, -1, "author" );
341 if( lua_isstring( L, -1 ) )
343 p_ext->psz_author = strdup( luaL_checkstring( L, -1 ) );
347 p_ext->psz_author = NULL;
351 /* Get description */
352 lua_getfield( L, -1, "description" );
353 if( lua_isstring( L, -1 ) )
355 p_ext->psz_description = strdup( luaL_checkstring( L, -1 ) );
359 p_ext->psz_description = NULL;
363 /* Get short description */
364 lua_getfield( L, -1, "shortdesc" );
365 if( lua_isstring( L, -1 ) )
367 p_ext->psz_shortdescription = strdup( luaL_checkstring( L, -1 ) );
371 p_ext->psz_shortdescription = NULL;
376 lua_getfield( L, -1, "url" );
377 if( lua_isstring( L, -1 ) )
379 p_ext->psz_url = strdup( luaL_checkstring( L, -1 ) );
383 p_ext->psz_url = NULL;
388 lua_getfield( L, -1, "version" );
389 if( lua_isstring( L, -1 ) )
391 p_ext->psz_version = strdup( luaL_checkstring( L, -1 ) );
395 p_ext->psz_version = NULL;
401 msg_Warn( p_mgr, "In script %s, function descriptor() "
402 "did not return a table!", psz_script );
408 msg_Err( p_mgr, "Script %s went completely foobar", psz_script );
412 msg_Dbg( p_mgr, "Script %s has the following capability flags: 0x%x",
413 psz_script, p_ext->p_sys->i_capabilities );
419 free( p_ext->psz_name );
420 free( p_ext->psz_title );
421 free( p_ext->psz_url );
422 free( p_ext->psz_author );
423 free( p_ext->psz_description );
424 free( p_ext->psz_shortdescription );
425 free( p_ext->psz_version );
426 vlc_mutex_destroy( &p_ext->p_sys->command_lock );
427 vlc_mutex_destroy( &p_ext->p_sys->running_lock );
428 vlc_cond_destroy( &p_ext->p_sys->wait );
429 free( p_ext->p_sys );
434 /* Add the extension to the list of known extensions */
435 ARRAY_APPEND( p_mgr->extensions, p_ext );
438 vlc_mutex_unlock( &p_mgr->lock );
439 /* Continue batch execution */
440 return pb_continue ? ( (* (bool*)pb_continue) ? -1 : 0 ) : -1;
443 static int Control( extensions_manager_t *p_mgr, int i_control, va_list args )
445 extension_t *p_ext = NULL;
447 uint16_t **ppus = NULL;
448 char ***pppsz = NULL;
453 case EXTENSION_ACTIVATE:
454 p_ext = ( extension_t* ) va_arg( args, extension_t* );
455 return Activate( p_mgr, p_ext );
457 case EXTENSION_DEACTIVATE:
458 p_ext = ( extension_t* ) va_arg( args, extension_t* );
459 return Deactivate( p_mgr, p_ext );
461 case EXTENSION_IS_ACTIVATED:
462 p_ext = ( extension_t* ) va_arg( args, extension_t* );
463 pb = ( bool* ) va_arg( args, bool* );
464 *pb = IsActivated( p_mgr, p_ext );
467 case EXTENSION_HAS_MENU:
468 p_ext = ( extension_t* ) va_arg( args, extension_t* );
469 pb = ( bool* ) va_arg( args, bool* );
470 *pb = ( p_ext->p_sys->i_capabilities & EXT_HAS_MENU ) ? 1 : 0;
473 case EXTENSION_GET_MENU:
474 p_ext = ( extension_t* ) va_arg( args, extension_t* );
475 pppsz = ( char*** ) va_arg( args, char*** );
476 ppus = ( uint16_t** ) va_arg( args, uint16_t** );
477 return GetMenuEntries( p_mgr, p_ext, pppsz, ppus );
479 case EXTENSION_TRIGGER_ONLY:
480 p_ext = ( extension_t* ) va_arg( args, extension_t* );
481 pb = ( bool* ) va_arg( args, bool* );
482 *pb = ( p_ext->p_sys->i_capabilities & EXT_TRIGGER_ONLY ) ? 1 : 0;
485 case EXTENSION_TRIGGER:
486 p_ext = ( extension_t* ) va_arg( args, extension_t* );
487 return TriggerExtension( p_mgr, p_ext );
489 case EXTENSION_TRIGGER_MENU:
490 p_ext = ( extension_t* ) va_arg( args, extension_t* );
491 // GCC: 'uint16_t' is promoted to 'int' when passed through '...'
492 i = ( int ) va_arg( args, int );
493 return TriggerMenu( p_ext, i );
495 case EXTENSION_SET_INPUT:
497 p_ext = ( extension_t* ) va_arg( args, extension_t* );
498 input_thread_t *p_input = va_arg( args, struct input_thread_t * );
500 if( !LockExtension( p_ext ) )
504 input_thread_t *old = p_ext->p_sys->p_input;
505 input_item_t *p_item;
508 // Untrack meta fetched events
509 if( p_ext->p_sys->i_capabilities & EXT_META_LISTENER )
511 p_item = input_GetItem( old );
512 vlc_event_detach( &p_item->event_manager,
513 vlc_InputItemMetaChanged,
514 inputItemMetaChanged,
516 vlc_gc_decref( p_item );
518 vlc_object_release( old );
521 p_ext->p_sys->p_input = p_input ? vlc_object_hold( p_input )
524 // Tell the script the input changed
525 if( p_ext->p_sys->i_capabilities & EXT_INPUT_LISTENER )
527 PushCommandUnique( p_ext, CMD_SET_INPUT );
530 // Track meta fetched events
531 if( p_ext->p_sys->p_input &&
532 p_ext->p_sys->i_capabilities & EXT_META_LISTENER )
534 p_item = input_GetItem( p_ext->p_sys->p_input );
535 vlc_gc_incref( p_item );
536 vlc_event_attach( &p_item->event_manager,
537 vlc_InputItemMetaChanged,
538 inputItemMetaChanged,
542 UnlockExtension( p_ext );
547 msg_Warn( p_mgr, "Control '%d' not yet implemented in Extension",
555 int lua_ExtensionActivate( extensions_manager_t *p_mgr, extension_t *p_ext )
557 assert( p_mgr != NULL && p_ext != NULL );
558 return lua_ExecuteFunction( p_mgr, p_ext, "activate" );
561 int lua_ExtensionDeactivate( extensions_manager_t *p_mgr, extension_t *p_ext )
563 assert( p_mgr != NULL && p_ext != NULL );
565 if( !p_ext->p_sys->L )
568 // Unset and release input objects
569 if( p_ext->p_sys->p_input )
571 if( p_ext->p_sys->i_capabilities & EXT_META_LISTENER )
574 input_item_t *p_item = input_GetItem( p_ext->p_sys->p_input );
575 vlc_gc_decref( p_item );
577 vlc_object_release( p_ext->p_sys->p_input );
580 int i_ret = lua_ExecuteFunction( p_mgr, p_ext, "deactivate" );
582 /* Clear Lua State */
583 lua_close( p_ext->p_sys->L );
584 p_ext->p_sys->L = NULL;
589 int lua_ExtensionWidgetClick( extensions_manager_t *p_mgr,
591 extension_widget_t *p_widget )
593 if( !p_ext->p_sys->L )
596 return lua_ExecuteFunction( p_mgr, p_ext, (const char*) p_widget->p_sys );
601 * Get the list of menu entries from an extension script
604 * @param pppsz_titles Pointer to NULL. All strings must be freed by the caller
605 * @param ppi_ids Pointer to NULL. Must be feed by the caller.
606 * @note This function is allowed to run in the UI thread. This means
607 * that it MUST respond very fast.
608 * @todo Remove the menu() hook and provide a new function vlc.set_menu()
610 static int GetMenuEntries( extensions_manager_t *p_mgr, extension_t *p_ext,
611 char ***pppsz_titles, uint16_t **ppi_ids )
613 assert( *pppsz_titles == NULL );
614 assert( *ppi_ids == NULL );
616 if( !IsActivated( p_mgr, p_ext ) )
618 msg_Dbg( p_mgr, "Can't get menu before activating the extension!" );
622 if( !LockExtension( p_ext ) )
624 /* Dying extension, fail. */
628 int i_ret = VLC_EGENERIC;
629 lua_State *L = GetLuaState( p_mgr, p_ext );
631 if( ( p_ext->p_sys->i_capabilities & EXT_HAS_MENU ) == 0 )
633 msg_Dbg( p_mgr, "can't get a menu from an extension without menu!" );
637 lua_getglobal( L, "menu" );
639 if( !lua_isfunction( L, -1 ) )
641 msg_Warn( p_mgr, "Error while runing script %s, "
642 "function menu() not found", p_ext->psz_name );
646 if( lua_pcall( L, 0, 1, 0 ) )
648 msg_Warn( p_mgr, "Error while runing script %s, "
649 "function menu(): %s", p_ext->psz_name,
650 lua_tostring( L, lua_gettop( L ) ) );
654 if( lua_gettop( L ) )
656 if( lua_istable( L, -1 ) )
659 size_t i_size = lua_objlen( L, -1 );
660 *pppsz_titles = ( char** ) calloc( i_size+1, sizeof( char* ) );
661 *ppi_ids = ( uint16_t* ) calloc( i_size+1, sizeof( uint16_t ) );
666 while( lua_next( L, -2 ) != 0 )
668 assert( i_idx < i_size );
669 if( (!lua_isstring( L, -1 )) || (!lua_isnumber( L, -2 )) )
671 msg_Warn( p_mgr, "In script %s, an entry in "
672 "the menu table is invalid!", p_ext->psz_name );
675 (*pppsz_titles)[ i_idx ] = strdup( luaL_checkstring( L, -1 ) );
676 (*ppi_ids)[ i_idx ] = (uint16_t) ( luaL_checkinteger( L, -2 ) & 0xFFFF );
683 msg_Warn( p_mgr, "Function menu() in script %s "
684 "did not return a table", p_ext->psz_name );
690 msg_Warn( p_mgr, "Script %s went completely foobar", p_ext->psz_name );
697 UnlockExtension( p_ext );
698 if( i_ret != VLC_SUCCESS )
700 msg_Dbg( p_mgr, "Something went wrong in %s (%s:%d)",
701 __func__, __FILE__, __LINE__ );
706 /* Must be entered with the Lock on Extension */
707 static lua_State* GetLuaState( extensions_manager_t *p_mgr,
719 msg_Err( p_mgr, "Could not create new Lua State" );
723 luaL_register( L, "vlc", p_reg );
726 lua_pushlightuserdata( L, p_mgr );
727 lua_setfield( L, -2, "private" );
729 lua_pushlightuserdata( L, p_ext );
730 lua_setfield( L, -2, "extension" );
734 /* Load more libraries */
737 luaopen_dialog( L, p_ext );
744 luaopen_playlist( L );
747 luaopen_strings( L );
748 luaopen_variables( L );
753 /* Register extension specific functions */
754 lua_getglobal( L, "vlc" );
755 lua_pushcfunction( L, vlclua_extension_deactivate );
756 lua_setfield( L, -2, "deactivate" );
758 /* Load and run the script(s) */
759 if( luaL_dofile( L, p_ext->psz_name ) != 0 )
761 msg_Warn( p_mgr, "Error loading script %s: %s", p_ext->psz_name,
762 lua_tostring( L, lua_gettop( L ) ) );
773 msg_Dbg( p_mgr, "Reusing old Lua state for extension '%s'",
782 * Execute a function in a Lua script
783 * @return < 0 in case of failure, >= 0 in case of success
784 * @note It's better to call this function from a dedicated thread
785 * (see extension_thread.c)
787 int lua_ExecuteFunction( extensions_manager_t *p_mgr,
789 const char *psz_function )
791 int i_ret = VLC_EGENERIC;
792 assert( p_mgr != NULL );
793 assert( p_ext != NULL );
795 lua_State *L = GetLuaState( p_mgr, p_ext );
796 lua_getglobal( L, psz_function );
798 if( !lua_isfunction( L, -1 ) )
800 msg_Warn( p_mgr, "Error while runing script %s, "
801 "function %s() not found", p_ext->psz_name, psz_function );
805 if( lua_pcall( L, 0, 1, 0 ) )
807 msg_Warn( p_mgr, "Error while runing script %s, "
808 "function %s(): %s", p_ext->psz_name, psz_function,
809 lua_tostring( L, lua_gettop( L ) ) );
813 i_ret = lua_DialogFlush( L );
818 static inline int TriggerMenu( extension_t *p_ext, int i_id )
820 return PushCommand( p_ext, CMD_TRIGGERMENU, i_id );
823 int lua_ExtensionTriggerMenu( extensions_manager_t *p_mgr,
824 extension_t *p_ext, int id )
826 int i_ret = VLC_EGENERIC;
827 lua_State *L = GetLuaState( p_mgr, p_ext );
832 luaopen_dialog( L, p_ext );
834 lua_getglobal( L, "trigger_menu" );
835 if( !lua_isfunction( L, -1 ) )
837 msg_Warn( p_mgr, "Error while runing script %s, "
838 "function trigger_menu() not found", p_ext->psz_name );
842 /* Pass id as unique argument to the function */
843 lua_pushinteger( L, id );
845 if( lua_pcall( L, 1, 1, 0 ) != 0 )
847 msg_Warn( p_mgr, "Error while runing script %s, "
848 "function trigger_menu(): %s", p_ext->psz_name,
849 lua_tostring( L, lua_gettop( L ) ) );
853 i_ret = lua_DialogFlush( L );
854 if( i_ret < VLC_SUCCESS )
856 msg_Dbg( p_mgr, "Something went wrong in %s (%s:%d)",
857 __func__, __FILE__, __LINE__ );
862 /** Directly trigger an extension, without activating it
863 * This is NOT multithreaded, and this code runs in the UI thread
865 * @param p_ext Extension to trigger
866 * @return Value returned by the lua function "trigger"
868 static int TriggerExtension( extensions_manager_t *p_mgr,
871 int i_ret = lua_ExecuteFunction( p_mgr, p_ext, "trigger" );
873 /* Close lua state for trigger-only extensions */
874 if( p_ext->p_sys->L )
875 lua_close( p_ext->p_sys->L );
876 p_ext->p_sys->L = NULL;
881 /** Retrieve extension associated to the current script
882 * @param L current lua_State
883 * @return Lua userdata "vlc.extension"
885 extension_t *vlclua_extension_get( lua_State *L )
887 extension_t *p_ext = NULL;
888 lua_getglobal( L, "vlc" );
889 lua_getfield( L, -1, "extension" );
890 p_ext = (extension_t*) lua_topointer( L, lua_gettop( L ) );
895 /** Deactivate an extension by order from the extension itself
897 * @note This is an asynchronous call. A script calling vlc.deactivate() will
898 * be executed to the end before the last call to deactivate() is done.
900 int vlclua_extension_deactivate( lua_State *L )
902 extension_t *p_ext = vlclua_extension_get( L );
903 int i_ret = Deactivate( p_ext->p_sys->p_mgr, p_ext );
904 return ( i_ret == VLC_SUCCESS ) ? 1 : 0;
907 /** Callback for the variable "dialog-event"
908 * @param p_this Current object owner of the extension and the dialog
909 * @param psz_var "dialog-event"
910 * @param oldval Unused
911 * @param newval Address of the dialog
912 * @param p_data Unused
914 static int vlclua_extension_dialog_callback( vlc_object_t *p_this,
920 /* psz_var == "dialog-event" */
925 extension_dialog_command_t *command = newval.p_address;
926 assert( command != NULL );
927 assert( command->p_dlg != NULL);
929 extension_t *p_ext = command->p_dlg->p_sys;
930 assert( p_ext != NULL );
932 extension_widget_t *p_widget = command->p_data;
934 switch( command->event )
936 case EXTENSION_EVENT_CLICK:
937 assert( p_widget != NULL );
938 PushCommand( p_ext, CMD_CLICK, p_widget );
940 case EXTENSION_EVENT_CLOSE:
941 PushCommandUnique( p_ext, CMD_CLOSE );
944 msg_Dbg( p_this, "Received unknown UI event %d, discarded",
952 /** Callback on vlc_InputItemMetaChanged event
954 static void inputItemMetaChanged( const vlc_event_t *p_event,
957 assert( p_event && p_event->type == vlc_InputItemMetaChanged );
959 extension_t *p_ext = ( extension_t* ) data;
960 assert( p_ext != NULL );
962 PushCommandUnique( p_ext, CMD_UPDATE_META );
965 /* Lock this extension. Can fail. */
966 bool LockExtension( extension_t *p_ext )
968 if( p_ext->p_sys->b_exiting )
971 vlc_mutex_lock( &p_ext->p_sys->running_lock );
972 if( p_ext->p_sys->b_exiting )
974 vlc_mutex_unlock( &p_ext->p_sys->running_lock );
981 void UnlockExtension( extension_t *p_ext )
983 vlc_mutex_unlock( &p_ext->p_sys->running_lock );