X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fcontrol%2Fevent.c;h=a98f23c7ab0e2266220625c601e93c5efce09521;hb=0386618539878fde94110df15b77ba7c79e54e8c;hp=723ac03380b4c4b1554860f00a3ac505c9ac931c;hpb=78f85ea06c88689f9c354201ea797f2c1894f14d;p=vlc diff --git a/src/control/event.c b/src/control/event.c index 723ac03380..a98f23c7ab 100644 --- a/src/control/event.c +++ b/src/control/event.c @@ -5,6 +5,7 @@ * $Id $ * * Authors: Filippo Carone + * Pierre d'Herbemont * * 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 @@ -23,139 +24,356 @@ #include "libvlc_internal.h" #include - +#include /* * Private functions */ -static int handle_event( vlc_object_t *p_this, char const *psz_cmd, - vlc_value_t oldval, vlc_value_t newval, - void *p_data ) +static bool +listeners_are_equal( libvlc_event_listener_t * listener1, + libvlc_event_listener_t * listener2 ) { - struct libvlc_callback_entry_t *entry = p_data; - libvlc_event_t event; - event.type = entry->i_event_type; - switch ( event.type ) + return listener1->event_type == listener2->event_type && + listener1->pf_callback == listener2->pf_callback && + listener1->p_user_data == listener2->p_user_data; +} + +static bool +group_contains_listener( libvlc_event_listeners_group_t * group, + libvlc_event_listener_t * searched_listener ) +{ + int i; + for( i = 0; i < vlc_array_count(&group->listeners); i++ ) { - case VOLUME_CHANGED: - event.value_type = BOOLEAN_EVENT; - break; - case INPUT_POSITION_CHANGED: - break; - default: - break; + if( listeners_are_equal(searched_listener, vlc_array_item_at_index(&group->listeners, i)) ) + return true; + } + return false; +} + +/* + * Internal libvlc functions + */ + +/************************************************************************** + * libvlc_event_manager_init (internal) : + * + * Init an object's event manager. + **************************************************************************/ +libvlc_event_manager_t * +libvlc_event_manager_new( void * p_obj, libvlc_instance_t * p_libvlc_inst, + libvlc_exception_t *p_e ) +{ + libvlc_event_manager_t * p_em; + + p_em = malloc(sizeof( libvlc_event_manager_t )); + if( !p_em ) + { + libvlc_exception_raise( p_e, "No Memory left" ); + return NULL; + } + + p_em->p_obj = p_obj; + p_em->p_libvlc_instance = p_libvlc_inst; + libvlc_retain( p_libvlc_inst ); + vlc_array_init( &p_em->listeners_groups ); + vlc_mutex_init( &p_em->object_lock ); + vlc_mutex_init_recursive( &p_em->event_sending_lock ); + return p_em; +} + +/************************************************************************** + * libvlc_event_manager_release (internal) : + * + * Init an object's event manager. + **************************************************************************/ +void libvlc_event_manager_release( libvlc_event_manager_t * p_em ) +{ + libvlc_event_listeners_group_t * p_lg; + int i,j ; + + vlc_mutex_destroy( &p_em->event_sending_lock ); + vlc_mutex_destroy( &p_em->object_lock ); + + for( i = 0; i < vlc_array_count(&p_em->listeners_groups); i++) + { + p_lg = vlc_array_item_at_index( &p_em->listeners_groups, i ); + + for( j = 0; j < vlc_array_count(&p_lg->listeners); j++) + free( vlc_array_item_at_index( &p_lg->listeners, j ) ); + + vlc_array_clear( &p_lg->listeners ); + free( p_lg ); + } + vlc_array_clear( &p_em->listeners_groups ); + libvlc_release( p_em->p_libvlc_instance ); + free( p_em ); +} + +/************************************************************************** + * libvlc_event_manager_register_event_type (internal) : + * + * Init an object's event manager. + **************************************************************************/ +void libvlc_event_manager_register_event_type( + libvlc_event_manager_t * p_em, + libvlc_event_type_t event_type, + libvlc_exception_t * p_e ) +{ + libvlc_event_listeners_group_t * listeners_group; + listeners_group = malloc(sizeof(libvlc_event_listeners_group_t)); + if( !listeners_group ) + { + libvlc_exception_raise( p_e, "No Memory left" ); + return; } - event.old_value = oldval; - event.new_value = newval; - /* Call the client entry */ - entry->f_callback( entry->p_instance, &event, entry->p_user_data ); + listeners_group->event_type = event_type; + vlc_array_init( &listeners_group->listeners ); - return VLC_SUCCESS; + vlc_mutex_lock( &p_em->object_lock ); + vlc_array_append( &p_em->listeners_groups, listeners_group ); + vlc_mutex_unlock( &p_em->object_lock ); } -static inline void add_callback_entry( struct libvlc_callback_entry_t *entry, - struct libvlc_callback_entry_list_t **list ) +/************************************************************************** + * libvlc_event_send (internal) : + * + * Send a callback. + **************************************************************************/ +void libvlc_event_send( libvlc_event_manager_t * p_em, + libvlc_event_t * p_event ) { - struct libvlc_callback_entry_list_t *new_listitem; - - /* malloc/free strategy: - * - alloc-ded in add_callback_entry - * - free-ed by libvlc_event_remove_callback - * - free-ed in libvlc_destroy when entry is destroyed - */ - new_listitem = malloc( sizeof( struct libvlc_callback_entry_list_t ) ); - new_listitem->elmt = entry; - new_listitem->next = *list; - new_listitem->prev = NULL; - - if(*list) - (*list)->prev = new_listitem; - - *list = new_listitem; + libvlc_event_listeners_group_t * listeners_group = NULL; + libvlc_event_listener_t * listener_cached; + libvlc_event_listener_t * listener; + libvlc_event_listener_t * array_listeners_cached = NULL; + int i, i_cached_listeners = 0; + + /* Fill event with the sending object now */ + p_event->p_obj = p_em->p_obj; + + /* Here a read/write lock would be nice */ + + vlc_mutex_lock( &p_em->object_lock ); + for( i = 0; i < vlc_array_count(&p_em->listeners_groups); i++) + { + listeners_group = vlc_array_item_at_index(&p_em->listeners_groups, i); + if( listeners_group->event_type == p_event->type ) + { + if( vlc_array_count( &listeners_group->listeners ) <= 0 ) + break; + + /* Cache a copy of the listener to avoid locking issues */ + i_cached_listeners = vlc_array_count(&listeners_group->listeners); + array_listeners_cached = malloc(sizeof(libvlc_event_listener_t)*(i_cached_listeners)); + if( !array_listeners_cached ) + { + printf( "Can't alloc memory in libvlc_event_send" ); + break; + } + + listener_cached = array_listeners_cached; + for( i = 0; i < vlc_array_count(&listeners_group->listeners); i++) + { + listener = vlc_array_item_at_index(&listeners_group->listeners, i); + memcpy( listener_cached, listener, sizeof(libvlc_event_listener_t) ); + listener_cached++; + } + break; + } + } + + if( !listeners_group ) + { + free( array_listeners_cached ); + return; + } + + vlc_mutex_unlock( &p_em->object_lock ); + + vlc_mutex_lock( &p_em->event_sending_lock ); + listener_cached = array_listeners_cached; + listeners_group->b_sublistener_removed = false; + for( i = 0; i < i_cached_listeners; i++ ) + { + if( listeners_group->b_sublistener_removed ) + { + /* If a callback was removed, this gets called */ + bool valid_listener; + vlc_mutex_lock( &p_em->object_lock ); + valid_listener = group_contains_listener( listeners_group, listener_cached ); + vlc_mutex_unlock( &p_em->object_lock ); + if( !valid_listener ) + { + listener_cached++; + continue; + } + } + + listener_cached->pf_callback( p_event, listener_cached->p_user_data ); + listener_cached++; + } + vlc_mutex_unlock( &p_em->event_sending_lock ); + + free( array_listeners_cached ); } /* * Public libvlc functions */ -void libvlc_event_add_callback( libvlc_instance_t *p_instance, - libvlc_event_type_t i_event_type, - libvlc_callback_t f_callback, - void *user_data, - libvlc_exception_t *p_e ) +/************************************************************************** + * libvlc_event_type_name (public) : + * + * Get the char * name of an event type. + **************************************************************************/ +static const char event_type_to_name[][35] = +{ +#define EVENT(a) [a]=#a + EVENT(libvlc_MediaMetaChanged), + EVENT(libvlc_MediaSubItemAdded), + EVENT(libvlc_MediaDurationChanged), + EVENT(libvlc_MediaPreparsedChanged), + EVENT(libvlc_MediaFreed), + EVENT(libvlc_MediaStateChanged), + + EVENT(libvlc_MediaPlayerNothingSpecial), + EVENT(libvlc_MediaPlayerOpening), + EVENT(libvlc_MediaPlayerBuffering), + EVENT(libvlc_MediaPlayerPlaying), + EVENT(libvlc_MediaPlayerPaused), + EVENT(libvlc_MediaPlayerStopped), + EVENT(libvlc_MediaPlayerForward), + EVENT(libvlc_MediaPlayerBackward), + EVENT(libvlc_MediaPlayerEndReached), + EVENT(libvlc_MediaPlayerTimeChanged), + EVENT(libvlc_MediaPlayerPositionChanged), + EVENT(libvlc_MediaPlayerSeekableChanged), + EVENT(libvlc_MediaPlayerPausableChanged), + + EVENT(libvlc_MediaListItemAdded), + EVENT(libvlc_MediaListWillAddItem), + EVENT(libvlc_MediaListItemDeleted), + EVENT(libvlc_MediaListWillDeleteItem), + + EVENT(libvlc_MediaListViewItemAdded), + EVENT(libvlc_MediaListViewWillAddItem), + EVENT(libvlc_MediaListViewItemDeleted), + EVENT(libvlc_MediaListViewWillDeleteItem), + + EVENT(libvlc_MediaListPlayerPlayed), + EVENT(libvlc_MediaListPlayerNextItemSet), + EVENT(libvlc_MediaListPlayerStopped), + + EVENT(libvlc_MediaDiscovererStarted), + EVENT(libvlc_MediaDiscovererEnded) +#undef EVENT +}; + +static const char unkwown_event_name[] = "Unknown Event"; + +const char * libvlc_event_type_name( libvlc_event_type_t event_type ) { - struct libvlc_callback_entry_t *entry; - const char *callback_name = NULL; - - if ( !f_callback ) - RAISEVOID (" Callback function is null "); - - /* malloc/free strategy: - * - alloc-ded in libvlc_event_add_callback - * - free-ed by libvlc_event_add_callback on error - * - Not free-ed by libvlc_event_remove_callback (FIXME leaks) - * - Not free-ed in libvlc_destroy when entry is destroyed (FIXME leaks) - */ - entry = malloc( sizeof( struct libvlc_callback_entry_t ) ); - entry->f_callback = f_callback; - entry->i_event_type = i_event_type; - entry->p_user_data = user_data; - - switch ( i_event_type ) + if( event_type >= sizeof(event_type_to_name)/sizeof(event_type_to_name[0])) + return unkwown_event_name; + return event_type_to_name[event_type]; +} + +/************************************************************************** + * libvlc_event_attach (public) : + * + * Add a callback for an event. + **************************************************************************/ +void libvlc_event_attach( libvlc_event_manager_t * p_event_manager, + libvlc_event_type_t event_type, + libvlc_callback_t pf_callback, + void *p_user_data, + libvlc_exception_t *p_e ) +{ + libvlc_event_listeners_group_t * listeners_group; + libvlc_event_listener_t * listener; + int i; + + listener = malloc(sizeof(libvlc_event_listener_t)); + if( !listener ) { - case VOLUME_CHANGED: - callback_name = "volume-change"; - break; - case INPUT_POSITION_CHANGED: - break; - default: - free( entry ); - RAISEVOID( "Unsupported event." ); + libvlc_exception_raise( p_e, "No Memory left" ); + return; } - int res = var_AddCallback( p_instance->p_libvlc_int, - callback_name, - handle_event, - entry ); - - if (res != VLC_SUCCESS) + listener->event_type = event_type; + listener->p_user_data = p_user_data; + listener->pf_callback = pf_callback; + + vlc_mutex_lock( &p_event_manager->object_lock ); + for( i = 0; i < vlc_array_count(&p_event_manager->listeners_groups); i++ ) { - free ( entry ); - RAISEVOID("Internal callback registration was not successful. Callback not registered."); + listeners_group = vlc_array_item_at_index(&p_event_manager->listeners_groups, i); + if( listeners_group->event_type == listener->event_type ) + { + vlc_array_append( &listeners_group->listeners, listener ); + vlc_mutex_unlock( &p_event_manager->object_lock ); + return; + } } - - add_callback_entry( entry, &p_instance->p_callback_list ); + vlc_mutex_unlock( &p_event_manager->object_lock ); - return; + free(listener); + libvlc_exception_raise( p_e, + "This object event manager doesn't know about '%s' events", + libvlc_event_type_name(event_type)); } -void libvlc_event_remove_callback( libvlc_instance_t *p_instance, - libvlc_event_type_t i_event_type, - libvlc_callback_t f_callback, - void *p_user_data, - libvlc_exception_t *p_e ) +/************************************************************************** + * libvlc_event_detach (public) : + * + * Remove a callback for an event. + **************************************************************************/ +void libvlc_event_detach( libvlc_event_manager_t *p_event_manager, + libvlc_event_type_t event_type, + libvlc_callback_t pf_callback, + void *p_user_data, + libvlc_exception_t *p_e ) { - struct libvlc_callback_entry_list_t *p_listitem = p_instance->p_callback_list; + libvlc_event_listeners_group_t * listeners_group; + libvlc_event_listener_t * listener; + int i, j; - while( p_listitem ) + vlc_mutex_lock( &p_event_manager->event_sending_lock ); + vlc_mutex_lock( &p_event_manager->object_lock ); + for( i = 0; i < vlc_array_count(&p_event_manager->listeners_groups); i++) { - if( p_listitem->elmt->f_callback == f_callback - && ( p_listitem->elmt->i_event_type == i_event_type ) - && ( p_listitem->elmt->p_user_data == p_user_data ) - - ) + listeners_group = vlc_array_item_at_index(&p_event_manager->listeners_groups, i); + if( listeners_group->event_type == event_type ) { - if( p_listitem->prev ) - p_listitem->prev->next = p_listitem->next; - else - p_instance->p_callback_list = p_listitem->next; - - p_listitem->next->prev = p_listitem->prev; - free( p_listitem ); - break; + for( j = 0; j < vlc_array_count(&listeners_group->listeners); j++) + { + listener = vlc_array_item_at_index(&listeners_group->listeners, j); + if( listener->event_type == event_type && + listener->pf_callback == pf_callback && + listener->p_user_data == p_user_data ) + { + /* that's our listener */ + + /* Mark this group as edited so that libvlc_event_send + * will recheck what listener to call */ + listeners_group->b_sublistener_removed = false; + + free( listener ); + vlc_array_remove( &listeners_group->listeners, j ); + vlc_mutex_unlock( &p_event_manager->object_lock ); + vlc_mutex_unlock( &p_event_manager->event_sending_lock ); + return; + } + } } - p_listitem = p_listitem->next; } + vlc_mutex_unlock( &p_event_manager->object_lock ); + vlc_mutex_unlock( &p_event_manager->event_sending_lock ); + + libvlc_exception_raise( p_e, + "This object event manager doesn't know about '%s,%p,%p' event observer", + libvlc_event_type_name(event_type), pf_callback, p_user_data ); }