pw_port_methods Struct Reference

Port methods. More...

#include <pipewire/port.h>

Data Fields
uint32_t	version
int(*	add_listener )(void *object, struct spa_hook *listener, const struct pw_port_events *events, void *data)
int(*	subscribe_params )(void *object, uint32_t *ids, uint32_t n_ids)
	Subscribe to parameter changes.
int(*	enum_params )(void *object, int seq, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter)
	Enumerate port parameters.

Detailed Description

Port methods.

Field Documentation

version

uint32_t pw_port_methods::version

add_listener

int(* pw_port_methods::add_listener) (void *object, struct spa_hook *listener, const struct pw_port_events *events, void *data)

subscribe_params

int(* pw_port_methods::subscribe_params) (void *object, uint32_t *ids, uint32_t n_ids)

Subscribe to parameter changes.

Automatically emit param events for the given ids when they are changed.

Parameters

ids	an array of param ids
n_ids	the number of ids in ids

This requires X permissions on the port.

enum_params

int(* pw_port_methods::enum_params) (void *object, int seq, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter)

Enumerate port parameters.

Start enumeration of port parameters. For each param, a param event will be emitted.

Parameters

seq	a sequence number returned in the reply
id	the parameter id to enumerate
start	the start index or 0 for the first param
num	the maximum number of params to retrieve
filter	a param filter or NULL

This requires X permissions on the port.

---

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

• pipewire/port.h