Proxy Object

Represents an object on the client side. More...

Data Structures
struct	pw_proxy_events
	Proxy events, use pw_proxy_add_listener. More...

Macros
#define	pw_proxy_notify(p, type, event, version, ...)
#define	pw_proxy_call(p, type, method, version, ...)
#define	pw_proxy_call_res(p, type, method, version, ...)

Functions
struct pw_proxy *	pw_proxy_new (struct pw_proxy *factory, const char *type, uint32_t version, size_t user_data_size)
	Create a proxy object with a given id and type. More...
void	pw_proxy_add_listener (struct pw_proxy *proxy, struct spa_hook *listener, const struct pw_proxy_events *events, void *data)
	Add an event listener to proxy. More...
void	pw_proxy_add_object_listener (struct pw_proxy *proxy, struct spa_hook *listener, const void *funcs, void *data)
	Add a listener for the events received from the remote object. More...
void	pw_proxy_destroy (struct pw_proxy *proxy)
	destroy a proxy More...
void *	pw_proxy_get_user_data (struct pw_proxy *proxy)
	Get the user_data. More...
uint32_t	pw_proxy_get_id (struct pw_proxy *proxy)
	Get the local id of the proxy. More...
const char *	pw_proxy_get_type (struct pw_proxy *proxy, uint32_t *version)
	Get the type and version of the proxy. More...
struct pw_protocol *	pw_proxy_get_protocol (struct pw_proxy *proxy)
	Get the protocol used for the proxy. More...
int	pw_proxy_sync (struct pw_proxy *proxy, int seq)
	Generate an sync method for a proxy. More...
int	pw_proxy_set_bound_id (struct pw_proxy *proxy, uint32_t global_id)
	Set the global id this proxy is bound to. More...
uint32_t	pw_proxy_get_bound_id (struct pw_proxy *proxy)
	Get the global id bound to this proxy of SPA_ID_INVALID when not bound to a global. More...
int	pw_proxy_error (struct pw_proxy *proxy, int res, const char *error)
	Generate an error for a proxy. More...
int	pw_proxy_errorf (struct pw_proxy *proxy, int res, const char *error,...) 1(3
int struct spa_hook_list *	pw_proxy_get_object_listeners (struct pw_proxy *proxy)
	Get the listener of proxy. More...
const struct pw_protocol_marshal *	pw_proxy_get_marshal (struct pw_proxy *proxy)
	Get the marshal functions for the proxy. More...
int	pw_proxy_install_marshal (struct pw_proxy *proxy, bool implementor)
	Install a marshal function on a proxy. More...

Detailed Description

Represents an object on the client side.

A pw_proxy acts as a client side proxy to an object existing in a remote pipewire instance. The proxy is responsible for converting interface functions invoked by the client to PipeWire messages. Events will call the handlers set in listener.

See Proxy

Macro Definition Documentation

pw_proxy_call

#define pw_proxy_call	(		p,
			type,
			method,
			version,
			...
	)

Value:

        spa_interface_call((struct spa_interface*)p,                    \
                        type, method, version, ##__VA_ARGS__)

pw_proxy_call_res

#define pw_proxy_call_res	(		p,
			type,
			method,
			version,
			...
	)

Value:

({                                                                      \
        int _res = -ENOTSUP;                                            \
        spa_interface_call_res((struct spa_interface*)p,                \
                        type, _res, method, version, ##__VA_ARGS__);    \
        _res;                                                           \
})

pw_proxy_notify

#define pw_proxy_notify	(		p,
			type,
			event,
			version,
			...
	)

Value:

        spa_hook_list_call(pw_proxy_get_object_listeners(p),            \
                        type, event, version, ## __VA_ARGS__)

Function Documentation

pw_proxy_add_listener()

void pw_proxy_add_listener	(	struct pw_proxy *	proxy,
		struct spa_hook *	listener,
		const struct pw_proxy_events *	events,
		void *	data
	)

Add an event listener to proxy.

References spa_hook_list_append().

pw_proxy_add_object_listener()

void pw_proxy_add_object_listener	(	struct pw_proxy *	proxy,
		struct spa_hook *	listener,
		const void *	funcs,
		void *	data
	)

Add a listener for the events received from the remote object.

The events depend on the type of the remote object type.

Parameters

proxy	the proxy
listener	listener
funcs	proxied functions
data	data passed to events

References spa_hook_list_append().

pw_proxy_destroy()

void pw_proxy_destroy

(

struct pw_proxy *

proxy

)

destroy a proxy

destroy a proxy

Parameters

proxy

Proxy object to destroy

Note

This is normally called by The PipeWire Core Global Object when the server decides to destroy the server side object

References NAME, pw_core_destroy, and pw_log_debug.

Referenced by pw_core_disconnect(), pw_filter_disconnect(), and pw_stream_disconnect().

pw_proxy_error()

int pw_proxy_error	(	struct pw_proxy *	proxy,
		int	res,
		const char *	error
	)

Generate an error for a proxy.

References pw_core_error.

Referenced by pw_filter_set_error(), and pw_stream_set_error().

pw_proxy_errorf()

int pw_proxy_errorf	(	struct pw_proxy *	proxy,
		int	res,
		const char *	error,
			...
	)

pw_proxy_get_bound_id()

uint32_t pw_proxy_get_bound_id

(

struct pw_proxy *

proxy

)

Get the global id bound to this proxy of SPA_ID_INVALID when not bound to a global.

pw_proxy_get_id()

uint32_t pw_proxy_get_id

(

struct pw_proxy *

proxy

)

Get the local id of the proxy.

pw_proxy_get_marshal()

const struct pw_protocol_marshal* pw_proxy_get_marshal

(

struct pw_proxy *

proxy

)

Get the marshal functions for the proxy.

pw_proxy_get_object_listeners()

int struct spa_hook_list* pw_proxy_get_object_listeners

(

struct pw_proxy *

proxy

)

Get the listener of proxy.

pw_proxy_get_protocol()

struct pw_protocol* pw_proxy_get_protocol

(

struct pw_proxy *

proxy

)

Get the protocol used for the proxy.

pw_proxy_get_type()

const char* pw_proxy_get_type	(	struct pw_proxy *	proxy,
		uint32_t *	version
	)

Get the type and version of the proxy.

References pw_protocol_marshal::version.

pw_proxy_get_user_data()

void* pw_proxy_get_user_data

(

struct pw_proxy *

proxy

)

Get the user_data.

The size was given in pw_proxy_new

pw_proxy_install_marshal()

int pw_proxy_install_marshal	(	struct pw_proxy *	proxy,
		bool	implementor
	)

Install a marshal function on a proxy.

References pw_protocol_get_marshal(), PW_PROTOCOL_MARSHAL_FLAG_IMPL, SPA_INTERFACE_INIT, pw_protocol_marshal::type, and pw_protocol_marshal::version.

pw_proxy_new()

struct pw_proxy* pw_proxy_new	(	struct pw_proxy *	factory,
		const char *	type,
		uint32_t	version,
		size_t	user_data_size
	)

Create a proxy object with a given id and type.

Parameters

factory	another proxy object that serves as a factory
type	Type of the proxy object
user_data_size	size of user_data

Returns

A newly allocated proxy object or NULL on failure

This function creates a new proxy object with the supplied id and type. The proxy object will have an id assigned from the client id space.

See also

The PipeWire Core Global Object

References NAME, pw_log_debug, pw_proxy_init(), SPA_PTROFF, and impl::this.

pw_proxy_set_bound_id()

int pw_proxy_set_bound_id	(	struct pw_proxy *	proxy,
		uint32_t	global_id
	)

Set the global id this proxy is bound to.

This is usually used internally and will also emit the bound event

References NAME, and pw_log_debug.

pw_proxy_sync()

int pw_proxy_sync	(	struct pw_proxy *	proxy,
		int	seq
	)

Generate an sync method for a proxy.

This will generate a done event with the same seq number of the reply.

References NAME, pw_core_sync, and pw_log_debug.

Referenced by sm_object_sync_update().