Struct pipewire_sys::pw_node_methods

#[repr(C)]
pub struct pw_node_methods {
    pub version: u32,
    pub add_listener: Option<unsafe extern "C" fn(object: *mut c_void, listener: *mut spa_hook, events: *const pw_node_events, data: *mut c_void) -> c_int>,
    pub subscribe_params: Option<unsafe extern "C" fn(object: *mut c_void, ids: *mut u32, n_ids: u32) -> c_int>,
    pub enum_params: Option<unsafe extern "C" fn(object: *mut c_void, seq: c_int, id: u32, start: u32, num: u32, filter: *const spa_pod) -> c_int>,
    pub set_param: Option<unsafe extern "C" fn(object: *mut c_void, id: u32, flags: u32, param: *const spa_pod) -> c_int>,
    pub send_command: Option<unsafe extern "C" fn(object: *mut c_void, command: *const spa_command) -> c_int>,
}

Node methods

Fields

version: u32

add_listener: Option<unsafe extern "C" fn(object: *mut c_void, listener: *mut spa_hook, events: *const pw_node_events, data: *mut c_void) -> c_int>

subscribe_params: Option<unsafe extern "C" fn(object: *mut c_void, ids: *mut u32, n_ids: u32) -> c_int>

Subscribe to parameter changes

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

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

This requires X permissions on the node.

enum_params: Option<unsafe extern "C" fn(object: *mut c_void, seq: c_int, id: u32, start: u32, num: u32, filter: *const spa_pod) -> c_int>

Enumerate node parameters

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

\param seq a sequence number to place in the reply \param id the parameter id to enum or PW_ID_ANY for all \param start the start index or 0 for the first param \param num the maximum number of params to retrieve \param filter a param filter or NULL

This requires X permissions on the node.

set_param: Option<unsafe extern "C" fn(object: *mut c_void, id: u32, flags: u32, param: *const spa_pod) -> c_int>

Set a parameter on the node

\param id the parameter id to set \param flags extra parameter flags \param param the parameter to set

This requires X and W permissions on the node.

send_command: Option<unsafe extern "C" fn(object: *mut c_void, command: *const spa_command) -> c_int>

Send a command to the node

\param command the command to send

This requires X and W permissions on the node.

Trait Implementations

impl Clone for pw_node_methods

fn clone(&self) -> pw_node_methods

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for pw_node_methods

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for pw_node_methods