pw_filter_events Struct Reference

Events for a filter. More...

Data Fields
uint32_t	version
void(*	destroy )(void *data)
void(*	state_changed )(void *data, enum pw_filter_state old, enum pw_filter_state state, const char *error)
	when the filter state changes More...
void(*	io_changed )(void *data, void *port_data, uint32_t id, void *area, uint32_t size)
	when io changed on a port of the filter (when port_data is NULL). More...
void(*	param_changed )(void *data, void *port_data, uint32_t id, const struct spa_pod *param)
	when a parameter changed on a port of the filter (when port_data is NULL). More...
void(*	add_buffer )(void *data, void *port_data, struct pw_buffer *buffer)
	when a new buffer was created for a port More...
void(*	remove_buffer )(void *data, void *port_data, struct pw_buffer *buffer)
	when a buffer was destroyed for a port More...
void(*	process )(void *data, struct spa_io_position *position)
	do processing. More...
void(*	drained )(void *data)
	The filter is drained. More...
void(*	command )(void *data, const struct spa_command *command)
	A command notify, Since 0.3.39:1. More...

Detailed Description

Events for a filter.

These events are always called from the mainloop unless explicitly documented otherwise.

Examples

audio-dsp-filter.c, audio-dsp-src.c, and video-dsp-play.c.

Field Documentation

version

uint32_t pw_filter_events::version

destroy

void(* pw_filter_events::destroy) (void *data)

state_changed

void(* pw_filter_events::state_changed) (void *data, enum pw_filter_state old, enum pw_filter_state state, const char *error)

when the filter state changes

io_changed

void(* pw_filter_events::io_changed) (void *data, void *port_data, uint32_t id, void *area, uint32_t size)

when io changed on a port of the filter (when port_data is NULL).

param_changed

void(* pw_filter_events::param_changed) (void *data, void *port_data, uint32_t id, const struct spa_pod *param)

when a parameter changed on a port of the filter (when port_data is NULL).

add_buffer

void(* pw_filter_events::add_buffer) (void *data, void *port_data, struct pw_buffer *buffer)

when a new buffer was created for a port

remove_buffer

void(* pw_filter_events::remove_buffer) (void *data, void *port_data, struct pw_buffer *buffer)

when a buffer was destroyed for a port

process

void(* pw_filter_events::process) (void *data, struct spa_io_position *position)

do processing.

This is normally called from the mainloop but can also be called directly from the realtime data thread if the user is prepared to deal with this.

drained

void(* pw_filter_events::drained) (void *data)

The filter is drained.

command

void(* pw_filter_events::command) (void *data, const struct spa_command *command)

A command notify, Since 0.3.39:1.

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

• pipewire/filter.h