/** \defgroup pw_global Global * * \brief A global object visible to remote clients * * A global object is visible to remote clients and represents a resource * that can be used or inspected. * * Global objects represent resources that are available on the PipeWire * context and are accessible to remote clients. * Globals come and go when devices or other resources become available for * clients. * * Remote clients receives a list of globals when it binds to the registry * object. See \ref pw_registry. * * A client can bind to a global to send methods or receive events from * the global. * * See \ref page_proxy
*/
typedefint (*pw_global_bind_func_t) (void *object, /**< global object, see \ref pw_global_new */ struct pw_impl_client *client, /**< client that binds */
uint32_t permissions, /**< permissions for the bind */
uint32_t version, /**< client interface version */
uint32_t id /**< client proxy id */);
/** Global events, use \ref pw_global_add_listener */ struct pw_global_events { #define PW_VERSION_GLOBAL_EVENTS 0
uint32_t version;
/** The global is destroyed */ void (*destroy) (void *data); /** The global is freed */ void (*free) (void *data); /** The permissions changed for a client */ void (*permissions_changed) (void *data, struct pw_impl_client *client,
uint32_t old_permissions,
uint32_t new_permissions);
};
/** Create a new global object */ struct pw_global *
pw_global_new(struct pw_context *context, /**< the context */ constchar *type, /**< the interface type of the global */
uint32_t version, /**< the interface version of the global */ struct pw_properties *properties, /**< extra properties */
pw_global_bind_func_t func, /**< function to bind */ void *object /**< global object */);
/** Register a global object to the context registry */ int pw_global_register(struct pw_global *global);
/** Add an event listener on the global */ void pw_global_add_listener(struct pw_global *global, struct spa_hook *listener, conststruct pw_global_events *events, void *data);
/** Get the permissions of the global for a given client */
uint32_t pw_global_get_permissions(struct pw_global *global, struct pw_impl_client *client);
/** Get the context object of this global */ struct pw_context *pw_global_get_context(struct pw_global *global);
/** Get the global type */ constchar *pw_global_get_type(struct pw_global *global);
/** Check a global type */ bool pw_global_is_type(struct pw_global *global, constchar *type);
/** Get the global version */
uint32_t pw_global_get_version(struct pw_global *global);
/** Get the global properties */ conststruct pw_properties *pw_global_get_properties(struct pw_global *global);
/** Update the global properties, must be done when unregistered */ int pw_global_update_keys(struct pw_global *global, conststruct spa_dict *dict, constchar * const keys[]);
/** Get the object associated with the global. This depends on the type of the
* global */ void *pw_global_get_object(struct pw_global *global);
/** Get the unique id of the global */
uint32_t pw_global_get_id(struct pw_global *global);
/** Get the serial number of the global */
uint64_t pw_global_get_serial(struct pw_global *global);
/** Add a resource to a global */ int pw_global_add_resource(struct pw_global *global, struct pw_resource *resource);
/** Iterate all resources added to the global The callback should return * 0 to fetch the next item, any other value stops the iteration and returns * the value. When all callbacks return 0, this function returns 0 when all
* items are iterated. */ int pw_global_for_each_resource(struct pw_global *global, int (*callback) (void *data, struct pw_resource *resource), void *data);
/** Let a client bind to a global */ int pw_global_bind(struct pw_global *global, struct pw_impl_client *client,
uint32_t permissions,
uint32_t version,
uint32_t id);
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