264 lines
8.0 KiB
C
264 lines
8.0 KiB
C
/*****************************************************************************
|
|
* vlc_events.h: events definitions
|
|
* Interface used to send events.
|
|
*****************************************************************************
|
|
* Copyright (C) 2007 VLC authors and VideoLAN
|
|
* $Id: c3425102b47c0ed953b527412521d1c8698b083e $
|
|
*
|
|
* Authors: Pierre d'Herbemont
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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.
|
|
*****************************************************************************/
|
|
|
|
#ifndef VLC_EVENTS_H
|
|
# define VLC_EVENTS_H
|
|
|
|
#include <vlc_arrays.h>
|
|
#include <vlc_meta.h>
|
|
|
|
/**
|
|
* \file
|
|
* This file is the interface definition for events
|
|
* (implementation in src/misc/events.c)
|
|
*/
|
|
|
|
/*****************************************************************************
|
|
* Documentation
|
|
*****************************************************************************/
|
|
/*
|
|
**** Background
|
|
*
|
|
* This implements a way to send and receive event for an object (which can be
|
|
* a simple C struct or less).
|
|
*
|
|
* This is in direct concurrency with the Variable based Callback
|
|
* (see src/misc/variables.c).
|
|
*
|
|
* It has the following advantages over Variable based Callback:
|
|
* - No need to implement the whole VLC_COMMON_MEMBERS in the object,
|
|
* thus it reduce it size. This is especially true for input_item_t which
|
|
* doesn't have VLC_COMMON_MEMBERS. This is the first reason of existence of
|
|
* this implementation.
|
|
* - Libvlc can easily be based upon that.
|
|
* - Existing event are clearly declared (in include/vlc_events.h)
|
|
*
|
|
*
|
|
**** Example usage
|
|
*
|
|
* (vlc_cool_object_t doesn't need to have the VLC_COMMON_MEMBERS.)
|
|
*
|
|
* struct vlc_cool_object_t
|
|
* {
|
|
* ...
|
|
* vlc_event_manager_t p_event_manager;
|
|
* ...
|
|
* }
|
|
*
|
|
* vlc_my_cool_object_new()
|
|
* {
|
|
* ...
|
|
* vlc_event_manager_init( &p_self->p_event_manager, p_self, p_a_libvlc_object );
|
|
* vlc_event_manager_register_event_type(p_self->p_event_manager,
|
|
* vlc_MyCoolObjectDidSomething, p_e)
|
|
* ...
|
|
* }
|
|
*
|
|
* vlc_my_cool_object_release()
|
|
* {
|
|
* ...
|
|
* vlc_event_manager_fini( &p_self->p_event_manager );
|
|
* ...
|
|
* }
|
|
*
|
|
* vlc_my_cool_object_do_something()
|
|
* {
|
|
* ...
|
|
* vlc_event_t event;
|
|
* event.type = vlc_MyCoolObjectDidSomething;
|
|
* event.u.my_cool_object_did_something.what_it_did = kSomething;
|
|
* vlc_event_send( &p_self->p_event_manager, &event );
|
|
* }
|
|
* */
|
|
|
|
/*****************************************************************************
|
|
* Event Type
|
|
*****************************************************************************/
|
|
|
|
/* Private structure defined in misc/events.c */
|
|
struct vlc_event_listeners_group_t;
|
|
|
|
/* Event manager type */
|
|
typedef struct vlc_event_manager_t
|
|
{
|
|
void * p_obj;
|
|
vlc_mutex_t object_lock;
|
|
vlc_mutex_t event_sending_lock;
|
|
DECL_ARRAY(struct vlc_event_listeners_group_t *) listeners_groups;
|
|
} vlc_event_manager_t;
|
|
|
|
/* List of event */
|
|
typedef enum vlc_event_type_t {
|
|
/* Input (thread) events */
|
|
vlc_InputStateChanged,
|
|
vlc_InputSelectedStreamChanged,
|
|
|
|
/* Input item events */
|
|
vlc_InputItemMetaChanged,
|
|
vlc_InputItemSubItemAdded,
|
|
vlc_InputItemSubItemTreeAdded,
|
|
vlc_InputItemDurationChanged,
|
|
vlc_InputItemPreparsedChanged,
|
|
vlc_InputItemNameChanged,
|
|
vlc_InputItemInfoChanged,
|
|
vlc_InputItemErrorWhenReadingChanged,
|
|
|
|
/* Service Discovery event */
|
|
vlc_ServicesDiscoveryItemAdded,
|
|
vlc_ServicesDiscoveryItemRemoved,
|
|
vlc_ServicesDiscoveryItemRemoveAll,
|
|
vlc_ServicesDiscoveryStarted,
|
|
vlc_ServicesDiscoveryEnded,
|
|
|
|
/* Addons Manager events */
|
|
vlc_AddonFound,
|
|
vlc_AddonsDiscoveryEnded,
|
|
vlc_AddonChanged
|
|
} vlc_event_type_t;
|
|
|
|
/* Event definition */
|
|
typedef struct vlc_event_t
|
|
{
|
|
vlc_event_type_t type;
|
|
void * p_obj; /* Sender object, automatically filled by vlc_event_send() */
|
|
union vlc_event_type_specific
|
|
{
|
|
/* Input (thread) events */
|
|
struct vlc_input_state_changed
|
|
{
|
|
int new_state;
|
|
} input_state_changed;
|
|
struct vlc_input_selected_stream_changed
|
|
{
|
|
void * unused;
|
|
} input_selected_stream_changed;
|
|
|
|
/* Input item events */
|
|
struct vlc_input_item_meta_changed
|
|
{
|
|
vlc_meta_type_t meta_type;
|
|
} input_item_meta_changed;
|
|
struct vlc_input_item_subitem_added
|
|
{
|
|
input_item_t * p_new_child;
|
|
} input_item_subitem_added;
|
|
struct vlc_input_item_subitem_tree_added
|
|
{
|
|
input_item_node_t * p_root;
|
|
} input_item_subitem_tree_added;
|
|
struct vlc_input_item_duration_changed
|
|
{
|
|
mtime_t new_duration;
|
|
} input_item_duration_changed;
|
|
struct vlc_input_item_preparsed_changed
|
|
{
|
|
int new_status;
|
|
} input_item_preparsed_changed;
|
|
struct vlc_input_item_name_changed
|
|
{
|
|
const char * new_name;
|
|
} input_item_name_changed;
|
|
struct vlc_input_item_info_changed
|
|
{
|
|
void * unused;
|
|
} input_item_info_changed;
|
|
struct input_item_error_when_reading_changed
|
|
{
|
|
bool new_value;
|
|
} input_item_error_when_reading_changed;
|
|
|
|
/* Service discovery events */
|
|
struct vlc_services_discovery_item_added
|
|
{
|
|
input_item_t * p_new_item;
|
|
const char * psz_category;
|
|
} services_discovery_item_added;
|
|
struct vlc_services_discovery_item_removed
|
|
{
|
|
input_item_t * p_item;
|
|
} services_discovery_item_removed;
|
|
struct vlc_services_discovery_started
|
|
{
|
|
void * unused;
|
|
} services_discovery_started;
|
|
struct vlc_services_discovery_ended
|
|
{
|
|
void * unused;
|
|
} services_discovery_ended;
|
|
|
|
/* Addons */
|
|
struct vlc_addon_generic_event
|
|
{
|
|
addon_entry_t * p_entry;
|
|
} addon_generic_event;
|
|
} u;
|
|
} vlc_event_t;
|
|
|
|
/* Event callback type */
|
|
typedef void ( *vlc_event_callback_t )( const vlc_event_t *, void * );
|
|
|
|
/*****************************************************************************
|
|
* Event manager
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* p_obj points to the object that owns the event manager, and from
|
|
* which events are sent
|
|
*/
|
|
VLC_API int vlc_event_manager_init( vlc_event_manager_t * p_em, void * p_obj );
|
|
|
|
/*
|
|
* Destroy
|
|
*/
|
|
VLC_API void vlc_event_manager_fini( vlc_event_manager_t * p_em );
|
|
|
|
/*
|
|
* Tells a specific event manager that it will handle event_type object
|
|
*/
|
|
VLC_API int vlc_event_manager_register_event_type( vlc_event_manager_t * p_em,
|
|
vlc_event_type_t );
|
|
|
|
/*
|
|
* Send an event to the listener attached to this p_em.
|
|
*/
|
|
VLC_API void vlc_event_send( vlc_event_manager_t * p_em, vlc_event_t * );
|
|
|
|
/*
|
|
* Add a callback for an event.
|
|
*/
|
|
VLC_API int vlc_event_attach( vlc_event_manager_t * p_event_manager,
|
|
vlc_event_type_t event_type,
|
|
vlc_event_callback_t pf_callback,
|
|
void *p_user_data );
|
|
|
|
/*
|
|
* Remove a callback for an event.
|
|
*/
|
|
VLC_API void vlc_event_detach( vlc_event_manager_t *p_event_manager,
|
|
vlc_event_type_t event_type,
|
|
vlc_event_callback_t pf_callback,
|
|
void *p_user_data );
|
|
|
|
#endif /* VLC_EVENTS_H */
|