spa_handle_factory Struct Reference

Data Fields
uint32_t	version
const struct spa_dict *	info
	Extra information about the handles of this factory. More...
size_t(*	get_size )(const struct spa_handle_factory *factory, const struct spa_dict *params)
	Get the size of handles from this factory. More...
int(*	init )(const struct spa_handle_factory *factory, struct spa_handle *handle, const struct spa_dict *info, const struct spa_support *support, uint32_t n_support)
	Initialize an instance of this factory. More...
int(*	enum_interface_info )(const struct spa_handle_factory *factory, const struct spa_interface_info **info, uint32_t *index)
	spa_handle_factory::enum_interface_info: More...

Detailed Description

Examples

spa/examples/adapter-control.c, spa/examples/example-control.c, spa/examples/local-libcamera.c, and spa/examples/local-v4l2.c.

Field Documentation

version

uint32_t spa_handle_factory::version

Examples

spa/examples/adapter-control.c, spa/examples/example-control.c, and spa/examples/local-v4l2.c.

info

const struct spa_dict* spa_handle_factory::info

Extra information about the handles of this factory.

get_size

size_t(* spa_handle_factory::get_size) (const struct spa_handle_factory *factory, const struct spa_dict *params)

Get the size of handles from this factory.

Parameters

factory	a spa_handle_factory
params	extra parameters that determine the size of the handle.

init

int(* spa_handle_factory::init) (const struct spa_handle_factory *factory, struct spa_handle *handle, const struct spa_dict *info, const struct spa_support *support, uint32_t n_support)

Initialize an instance of this factory.

The caller should allocate memory at least size bytes and pass this as handle.

support can optionally contain extra interfaces or data items that the plugin can use such as a logger.

Parameters

factory	a spa_handle_factory
handle	a pointer to memory
info	extra handle specific information, usually obtained from a spa_device. This can be used to configure the handle.
support	support items
n_support	number of elements in support

Returns

0 on success < 0 errno type error

enum_interface_info

int(* spa_handle_factory::enum_interface_info) (const struct spa_handle_factory *factory, const struct spa_interface_info **info, uint32_t *index)

spa_handle_factory::enum_interface_info:

Parameters

factory	a spa_handle_factory
info	result to hold spa_interface_info.
index	index to keep track of the enumeration, 0 for first item

Enumerate the interface information for factory.

Returns

1 when an item is available 0 when no more items are available < 0 errno type error

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

• plugin.h