session-manager: split policy and monitor

Separate the session manager in a monitor and policy part.

The monitor manages the devices and endpoints.

The policy watches the nodes/ports/clients and applies the policy
of linking them.

Because both now have a separate connection, we can remove some
hacks in the protocol. When a remote was both the implementer and
user of an object we could get in a deadlock when the user was
blocked waiting and the implementator was blocked sending a reply.
We used to un-busy a client when it was expecting a reply from a
ping or sync for this reason.

Add and use some more keys for the endpoints and streams.

src/modules/module-client-device/protocol-native.c

@@ -88,7 +88,6 @@ static int device_marshal_sync(void *object, int seq)
 	struct pw_resource *resource = object;
 	struct spa_pod_builder *b;
 
-	pw_client_set_busy(pw_resource_get_client(resource), false);
 	b = pw_protocol_native_begin_resource(resource, SPA_DEVICE_METHOD_SYNC, &msg);
 
 	spa_pod_builder_add_struct(b,

src/modules/module-protocol-native.c

@@ -1007,7 +1007,7 @@ int pipewire__module_init(struct pw_module *module, const char *args)
 	pw_protocol_native_init(this);
 	pw_protocol_native0_init(this);
 
-	pw_log_debug(NAME" %p: new %d", this, debug_messages);
+	pw_log_debug(NAME" %p: new debug:%d", this, debug_messages);
 
 	d = pw_protocol_get_user_data(this);
 	d->protocol = this;

src/modules/module-protocol-native/protocol-native.c

@@ -416,7 +416,6 @@ static void core_event_marshal_ping(void *object, uint32_t id, int seq)
 	struct spa_pod_builder *b;
 	struct pw_protocol_native_message *msg;
 
-	pw_client_set_busy(pw_resource_get_client(resource), false);
 	b = pw_protocol_native_begin_resource(resource, PW_CORE_PROXY_EVENT_PING, &msg);
 
 	spa_pod_builder_add_struct(b,

src/modules/module-session-manager/client-endpoint.c

@@ -85,6 +85,8 @@ static int client_endpoint_stream_update(void *object,
 			PW_KEY_ENDPOINT_ID,
 			PW_KEY_MEDIA_CLASS,
 			PW_KEY_PRIORITY_SESSION,
+			PW_KEY_STREAM_NAME,
+			PW_KEY_STREAM_DESCRIPTION,
 			NULL
 		};
 

src/modules/module-session-manager/endpoint.c

@@ -288,6 +288,8 @@ int endpoint_init(struct endpoint *this,
 		PW_KEY_CLIENT_ID,
 		PW_KEY_DEVICE_ID,
 		PW_KEY_MEDIA_CLASS,
+		PW_KEY_ENDPOINT_NAME,
+		PW_KEY_ENDPOINT_ICON_NAME,
 		NULL
 	};