Port interface More...

Files
file	port.h
	`pipewire/port.h`

Data Structures
struct	pw_port_info

struct	pw_port_events
	Port events. More...

struct	pw_port_methods
	Port methods. More...

struct	pw_port

Macros
#define	PW_TYPE_INTERFACE_Port PW_TYPE_INFO_INTERFACE_BASE "Port"

#define	PW_PORT_PERM_MASK PW_PERM_R\|PW_PERM_X\|PW_PERM_M

#define	PW_VERSION_PORT 3

#define	pw_direction spa_direction
	The direction of a port.

#define	PW_DIRECTION_INPUT SPA_DIRECTION_INPUT

#define	PW_DIRECTION_OUTPUT SPA_DIRECTION_OUTPUT

#define	PW_PORT_CHANGE_MASK_PROPS (1 << 0)

#define	PW_PORT_CHANGE_MASK_PARAMS (1 << 1)

#define	PW_PORT_CHANGE_MASK_ALL ((1 << 2)-1)

#define	PW_PORT_EVENT_INFO 0

#define	PW_PORT_EVENT_PARAM 1

#define	PW_PORT_EVENT_NUM 2

#define	PW_VERSION_PORT_EVENTS 0

#define	PW_PORT_METHOD_ADD_LISTENER 0

#define	PW_PORT_METHOD_SUBSCRIBE_PARAMS 1

#define	PW_PORT_METHOD_ENUM_PARAMS 2

#define	PW_PORT_METHOD_NUM 3

#define	PW_VERSION_PORT_METHODS 0

#define	pw_port_method(o, method, version, ...)

#define	pw_port_add_listener(c, ...) pw_port_method(c,add_listener,0,__VA_ARGS__)

#define	pw_port_subscribe_params(c, ...) pw_port_method(c,subscribe_params,0,__VA_ARGS__)
	Subscribe to parameter changes.

#define	pw_port_enum_params(c, ...) pw_port_method(c,enum_params,0,__VA_ARGS__)
	Enumerate port parameters.

Functions
const char *	pw_direction_as_string (enum pw_direction direction)
	Convert a pw_direction to a readable string.

struct pw_port_info *	pw_port_info_update (struct pw_port_info info, const struct pw_port_info update)

struct pw_port_info *	pw_port_info_merge (struct pw_port_info info, const struct pw_port_info update, bool reset)

void	pw_port_info_free (struct pw_port_info *info)

Detailed Description

Port interface

Macro Definition Documentation

◆ PW_TYPE_INTERFACE_Port

#define PW_TYPE_INTERFACE_Port PW_TYPE_INFO_INTERFACE_BASE "Port"

◆ PW_PORT_PERM_MASK

#define PW_PORT_PERM_MASK PW_PERM_R|PW_PERM_X|PW_PERM_M

◆ PW_VERSION_PORT

#define PW_VERSION_PORT 3

◆ pw_direction

#define pw_direction spa_direction

The direction of a port.

◆ PW_DIRECTION_INPUT

#define PW_DIRECTION_INPUT SPA_DIRECTION_INPUT

Examples: audio-capture.c, audio-dsp-filter.c, tutorial5.c, video-dsp-play.c, video-play-fixate.c, video-play-pull.c, video-play-reneg.c, and video-play.c.

◆ PW_DIRECTION_OUTPUT

#define PW_DIRECTION_OUTPUT SPA_DIRECTION_OUTPUT

Examples: audio-dsp-filter.c, audio-dsp-src.c, audio-src.c, midi-src.c, tutorial4.c, video-dsp-src.c, video-src-alloc.c, video-src-fixate.c, video-src-reneg.c, and video-src.c.

◆ PW_PORT_CHANGE_MASK_PROPS

#define PW_PORT_CHANGE_MASK_PROPS (1 << 0)

◆ PW_PORT_CHANGE_MASK_PARAMS

#define PW_PORT_CHANGE_MASK_PARAMS (1 << 1)

◆ PW_PORT_CHANGE_MASK_ALL

#define PW_PORT_CHANGE_MASK_ALL ((1 << 2)-1)

◆ PW_PORT_EVENT_INFO

#define PW_PORT_EVENT_INFO 0

◆ PW_PORT_EVENT_PARAM

#define PW_PORT_EVENT_PARAM 1

◆ PW_PORT_EVENT_NUM

#define PW_PORT_EVENT_NUM 2

◆ PW_VERSION_PORT_EVENTS

#define PW_VERSION_PORT_EVENTS 0

◆ PW_PORT_METHOD_ADD_LISTENER

#define PW_PORT_METHOD_ADD_LISTENER 0

◆ PW_PORT_METHOD_SUBSCRIBE_PARAMS

#define PW_PORT_METHOD_SUBSCRIBE_PARAMS 1

◆ PW_PORT_METHOD_ENUM_PARAMS

#define PW_PORT_METHOD_ENUM_PARAMS 2

◆ PW_PORT_METHOD_NUM

#define PW_PORT_METHOD_NUM 3

◆ PW_VERSION_PORT_METHODS

#define PW_VERSION_PORT_METHODS 0

◆ pw_port_method

#define pw_port_method	(	o,
		method,
		version,
		... )

◆ pw_port_add_listener

#define pw_port_add_listener	(		c,
			... ) pw_port_method(c,add_listener,0,__VA_ARGS__)

See also: pw_port_methods.add_listener

◆ pw_port_subscribe_params

#define pw_port_subscribe_params	(		c,
			... ) pw_port_method(c,subscribe_params,0,__VA_ARGS__)

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.

See also: pw_port_methods.subscribe_params

◆ pw_port_enum_params

#define pw_port_enum_params	(		c,
			... ) pw_port_method(c,enum_params,0,__VA_ARGS__)

Enumerate port parameters.

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