PipeWire 1.2.6
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Node methods. More...
#include <pipewire/node.h>
Data Fields | |
uint32_t | version |
int(* | add_listener )(void *object, struct spa_hook *listener, const struct pw_node_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 node parameters. | |
int(* | set_param )(void *object, uint32_t id, uint32_t flags, const struct spa_pod *param) |
Set a parameter on the node. | |
int(* | send_command )(void *object, const struct spa_command *command) |
Send a command to the node. | |
Node methods.
uint32_t pw_node_methods::version |
int(* pw_node_methods::add_listener) (void *object, struct spa_hook *listener, const struct pw_node_events *events, void *data) |
int(* pw_node_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.
ids | an array of param ids |
n_ids | the number of ids in ids |
This requires X permissions on the node.
int(* pw_node_methods::enum_params) (void *object, int seq, uint32_t id, uint32_t start, uint32_t num, const struct spa_pod *filter) |
Enumerate node parameters.
Start enumeration of node parameters. For each param, a param event will be emitted.
seq | a sequence number to place in the reply |
id | the parameter id to enum or PW_ID_ANY for all |
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 node.
int(* pw_node_methods::set_param) (void *object, uint32_t id, uint32_t flags, const struct spa_pod *param) |
Set a parameter on the node.
id | the parameter id to set |
flags | extra parameter flags |
param | the parameter to set |
This requires X and W permissions on the node.
int(* pw_node_methods::send_command) (void *object, const struct spa_command *command) |
Send a command to the node.
command | the command to send |
This requires X and W permissions on the node.