pw_client_node_events Struct Reference

Client Node events More...

Data Fields
uint32_t	version
int(*	transport )(void *object, int readfd, int writefd, uint32_t mem_id, uint32_t offset, uint32_t size)
	Notify of a new transport area. More...
int(*	set_param )(void *object, uint32_t id, uint32_t flags, const struct spa_pod *param)
	Notify of a property change. More...
int(*	set_io )(void *object, uint32_t id, uint32_t mem_id, uint32_t offset, uint32_t size)
	Configure an IO area for the client. More...
int(*	event )(void *object, const struct spa_event *event)
	Receive an event from the client node. More...
int(*	command )(void *object, const struct spa_command *command)
	Notify of a new node command. More...
int(*	add_port )(void *object, enum spa_direction direction, uint32_t port_id, const struct spa_dict *props)
	A new port was added to the node. More...
int(*	remove_port )(void *object, enum spa_direction direction, uint32_t port_id)
	A port was removed from the node. More...
int(*	port_set_param )(void *object, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t flags, const struct spa_pod *param)
	A parameter was configured on the port. More...
int(*	port_use_buffers )(void *object, enum spa_direction direction, uint32_t port_id, uint32_t mix_id, uint32_t flags, uint32_t n_buffers, struct pw_client_node_buffer *buffers)
	Notify the port of buffers. More...
int(*	port_set_io )(void *object, enum spa_direction direction, uint32_t port_id, uint32_t mix_id, uint32_t id, uint32_t mem_id, uint32_t offset, uint32_t size)
	Configure the io area with id of port_id. More...
int(*	set_activation )(void *object, uint32_t node_id, int signalfd, uint32_t mem_id, uint32_t offset, uint32_t size)
	Notify the activation record of the next node to trigger. More...
int(*	port_set_mix_info )(void *object, enum spa_direction direction, uint32_t port_id, uint32_t mix_id, uint32_t peer_id, const struct spa_dict *props)
	Notify about the peer of mix_id. More...

Detailed Description

Client Node events

Field Documentation

version

uint32_t pw_client_node_events::version

transport

int(* pw_client_node_events::transport) (void *object, int readfd, int writefd, uint32_t mem_id, uint32_t offset, uint32_t size)

Notify of a new transport area.

The transport area is used to signal the client and the server.

Parameters

readfd	fd for signal data can be read
writefd	fd for signal data can be written
mem_id	id for activation memory
offset	offset of activation memory
size	size of activation memory

set_param

int(* pw_client_node_events::set_param) (void *object, uint32_t id, uint32_t flags, const struct spa_pod *param)

Notify of a property change.

When the server configures the properties on the node this event is sent

Parameters

id	the id of the parameter
flags	parameter flags
param	the param to set

set_io

int(* pw_client_node_events::set_io) (void *object, uint32_t id, uint32_t mem_id, uint32_t offset, uint32_t size)

Configure an IO area for the client.

IO areas are identified with an id and are used to exchange state between client and server

Parameters

id	the id of the io area
mem_id	the id of the memory to use
offset	offset of io area in memory
size	size of the io area

event

int(* pw_client_node_events::event) (void *object, const struct spa_event *event)

Receive an event from the client node.

Parameters

event

the received event

command

int(* pw_client_node_events::command) (void *object, const struct spa_command *command)

Notify of a new node command.

Parameters

command

the command

add_port

int(* pw_client_node_events::add_port) (void *object, enum spa_direction direction, uint32_t port_id, const struct spa_dict *props)

A new port was added to the node.

The server can at any time add a port to the node when there are free ports available.

Parameters

direction	the direction of the port
port_id	the new port id
props	extra properties

remove_port

int(* pw_client_node_events::remove_port) (void *object, enum spa_direction direction, uint32_t port_id)

A port was removed from the node.

Parameters

direction	a port direction
port_id	the remove port id

port_set_param

int(* pw_client_node_events::port_set_param) (void *object, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t flags, const struct spa_pod *param)

A parameter was configured on the port.

Parameters

direction	a port direction
port_id	the port id
id	the id of the parameter
flags	flags used when setting the param
param	the new param

port_use_buffers

int(* pw_client_node_events::port_use_buffers) (void *object, enum spa_direction direction, uint32_t port_id, uint32_t mix_id, uint32_t flags, uint32_t n_buffers, struct pw_client_node_buffer *buffers)

Notify the port of buffers.

Parameters

direction	a port direction
port_id	the port id
mix_id	the mixer port id
n_buffer	the number of buffers
buffers	and array of buffer descriptions

port_set_io

int(* pw_client_node_events::port_set_io) (void *object, enum spa_direction direction, uint32_t port_id, uint32_t mix_id, uint32_t id, uint32_t mem_id, uint32_t offset, uint32_t size)

Configure the io area with id of port_id.

Parameters

direction	the direction of the port
port_id	the port id
mix_id	the mixer port id
id	the id of the io area to set
mem_id	the id of the memory to use
offset	offset of io area in memory
size	size of the io area

set_activation

int(* pw_client_node_events::set_activation) (void *object, uint32_t node_id, int signalfd, uint32_t mem_id, uint32_t offset, uint32_t size)

Notify the activation record of the next node to trigger.

Parameters

node_id	the peer node id
signalfd	the fd to wake up the peer
mem_id	the mem id of the memory
the	offset in mem_id to map
the	size of mem_id to map

port_set_mix_info

int(* pw_client_node_events::port_set_mix_info) (void *object, enum spa_direction direction, uint32_t port_id, uint32_t mix_id, uint32_t peer_id, const struct spa_dict *props)

Notify about the peer of mix_id.

Parameters

direction	the direction of the port
port_id	the port id
mix_id	the mix id
peer_id	the id of the peer port
props	extra properties

Since version 4:1

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The documentation for this struct was generated from the following file:

• pipewire/extensions/client-node.h