Global

A global object visible to remote clients. More...

Files
file	global.h
	pipewire/global.h

Data Structures
struct	pw_global_events
	Global events, use pw_global_add_listener. More...
struct	pw_global

Macros
#define	PW_VERSION_GLOBAL_EVENTS   0

Typedefs
typedef int(*	pw_global_bind_func_t) (void *object, struct pw_impl_client *client, uint32_t permissions, uint32_t version, uint32_t id)

Functions
struct pw_global *	pw_global_new (struct pw_context *context, const char *type, uint32_t version, struct pw_properties *properties, pw_global_bind_func_t func, void *object)
	Create a new global object. More...
int	pw_global_register (struct pw_global *global)
	Register a global object to the context registry. More...
void	pw_global_add_listener (struct pw_global *global, struct spa_hook *listener, const struct pw_global_events *events, void *data)
	Add an event listener on the global. More...
uint32_t	pw_global_get_permissions (struct pw_global *global, struct pw_impl_client *client)
	Get the permissions of the global for a given client. More...
struct pw_context *	pw_global_get_context (struct pw_global *global)
	Get the context object of this global. More...
const char *	pw_global_get_type (struct pw_global *global)
	Get the global type. More...
bool	pw_global_is_type (struct pw_global *global, const char *type)
	Check a global type. More...
uint32_t	pw_global_get_version (struct pw_global *global)
	Get the global version. More...
const struct pw_properties *	pw_global_get_properties (struct pw_global *global)
	Get the global properties. More...
int	pw_global_update_keys (struct pw_global *global, const struct spa_dict *dict, const char *const keys[])
	Update the global properties, must be done when unregistered. More...
void *	pw_global_get_object (struct pw_global *global)
	Get the object associated with the global. More...
uint32_t	pw_global_get_id (struct pw_global *global)
	Get the unique id of the global. More...
uint64_t	pw_global_get_serial (struct pw_global *global)
	Get the serial number of the global. More...
int	pw_global_add_resource (struct pw_global *global, struct pw_resource *resource)
	Add a resource to a global. More...
int	pw_global_for_each_resource (struct pw_global *global, int(*callback)(void *data, struct pw_resource *resource), void *data)
	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. More...
int	pw_global_bind (struct pw_global *global, struct pw_impl_client *client, uint32_t permissions, uint32_t version, uint32_t id)
	Let a client bind to a global. More...
int	pw_global_update_permissions (struct pw_global *global, struct pw_impl_client *client, uint32_t old_permissions, uint32_t new_permissions)
void	pw_global_destroy (struct pw_global *global)
	Destroy a global. More...

Detailed Description

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 Registry.

A client can bind to a global to send methods or receive events from the global.

See Proxy

Macro Definition Documentation

PW_VERSION_GLOBAL_EVENTS

#define PW_VERSION_GLOBAL_EVENTS   0

Typedef Documentation

pw_global_bind_func_t

typedef int(* pw_global_bind_func_t) (void *object, struct pw_impl_client *client, uint32_t permissions, uint32_t version, uint32_t id)

Parameters

object	global object, see pw_global_new
client	client that binds
permissions	permissions for the bind
version	client interface version
id	client proxy id

Function Documentation

pw_global_new()

struct pw_global* pw_global_new	(	struct pw_context *	context,
		const char *	type,
		uint32_t	version,
		struct pw_properties *	properties,
		pw_global_bind_func_t	func,
		void *	object
	)

Create a new global object.

Create a new global object.

Parameters

context	a context object
type	the type of the global
version	the version of the type
properties	extra properties
func	a function to bind to this global
object	the associated object

Returns

a result global

Parameters

context	the context
type	the interface type of the global
version	the interface version of the global
properties	extra properties
func	function to bind
object	global object

pw_global_register()

int pw_global_register

(

struct pw_global *

global

)

Register a global object to the context registry.

Register a global object to the context registry.

Parameters

global

a global to add

Returns

0 on success < 0 errno value on failure

pw_global_add_listener()

void pw_global_add_listener	(	struct pw_global *	global,
		struct spa_hook *	listener,
		const struct pw_global_events *	events,
		void *	data
	)

Add an event listener on the global.

pw_global_get_permissions()

uint32_t pw_global_get_permissions	(	struct pw_global *	global,
		struct pw_impl_client *	client
	)

Get the permissions of the global for a given client.

pw_global_get_context()

struct pw_context* pw_global_get_context

(

struct pw_global *

global

)

Get the context object of this global.

pw_global_get_type()

const char* pw_global_get_type

(

struct pw_global *

global

)

Get the global type.

pw_global_is_type()

bool pw_global_is_type	(	struct pw_global *	global,
		const char *	type
	)

Check a global type.

pw_global_get_version()

uint32_t pw_global_get_version

(

struct pw_global *

global

)

Get the global version.

pw_global_get_properties()

const struct pw_properties* pw_global_get_properties

(

struct pw_global *

global

)

Get the global properties.

pw_global_update_keys()

int pw_global_update_keys	(	struct pw_global *	global,
		const struct spa_dict *	dict,
		const char *const	keys[]
	)

Update the global properties, must be done when unregistered.

pw_global_get_object()

void* pw_global_get_object

(

struct pw_global *

global

)

Get the object associated with the global.

This depends on the type of the global

pw_global_get_id()

uint32_t pw_global_get_id

(

struct pw_global *

global

)

Get the unique id of the global.

pw_global_get_serial()

uint64_t pw_global_get_serial

(

struct pw_global *

global

)

Get the serial number of the global.

pw_global_add_resource()

int pw_global_add_resource	(	struct pw_global *	global,
		struct pw_resource *	resource
	)

Add a resource to a global.

pw_global_for_each_resource()

int pw_global_for_each_resource	(	struct pw_global *	global,
		int(*)(void *data, struct pw_resource *resource)	callback,
		void *	data
	)

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.

pw_global_bind()

int pw_global_bind	(	struct pw_global *	global,
		struct pw_impl_client *	client,
		uint32_t	permissions,
		uint32_t	version,
		uint32_t	id
	)

Let a client bind to a global.

Let a client bind to a global.

Parameters

global	the global to bind to
client	the client that binds
permissions	the Permission
version	the version
id	the id of the resource

Let client bind to global with the given version and id. After binding, the client and the global object will be able to exchange messages on the proxy/resource with id.

pw_global_update_permissions()

int pw_global_update_permissions	(	struct pw_global *	global,
		struct pw_impl_client *	client,
		uint32_t	old_permissions,
		uint32_t	new_permissions
	)

pw_global_destroy()

void pw_global_destroy

(

struct pw_global *

global

)

Destroy a global.

Parameters

global

a global to destroy