libcamera::ControlInfoMap Class Reference

A map of ControlId to ControlInfo. More...

Inherits unordered_map< const ControlId *, ControlInfo >.

Public Types
using	Map = std::unordered_map< const ControlId *, ControlInfo >
	The base std::unsorted_map<> container.

Public Member Functions
	ControlInfoMap (const ControlInfoMap &other)=default
	Copy constructor, construct a ControlInfoMap from a copy of other. More...
	ControlInfoMap (std::initializer_list< Map::value_type > init, const ControlIdMap &idmap)
	Construct a ControlInfoMap from an initializer list. More...
	ControlInfoMap (Map &&info, const ControlIdMap &idmap)
	Construct a ControlInfoMap from a plain map. More...
ControlInfoMap &	operator= (const ControlInfoMap &other)=default
	Copy assignment operator, replace the contents with a copy of other. More...
mapped_type &	at (unsigned int key)
	Access specified element by numerical ID. More...
const mapped_type &	at (unsigned int key) const
	Access specified element by numerical ID. More...
size_type	count (unsigned int key) const
	Count the number of elements matching a numerical ID. More...
iterator	find (unsigned int key)
	Find the element matching a numerical ID. More...
const_iterator	find (unsigned int key) const
	Find the element matching a numerical ID. More...
const ControlIdMap &	idmap () const
	Retrieve the ControlId map. More...

Detailed Description

A map of ControlId to ControlInfo.

The ControlInfoMap class describes controls supported by an object as an unsorted map of ControlId pointers to ControlInfo instances. Unlike the standard std::unsorted_map<> class, it is designed to be immutable once constructed, and thus only exposes the read accessors of the std::unsorted_map<> base class.

The class is constructed with a reference to a ControlIdMap. This allows providing access to the mapped elements using numerical ID keys, in addition to the features of the standard unsorted map. All ControlId keys in the map must appear in the ControlIdMap.

Constructor & Destructor Documentation

ControlInfoMap() [1/3]

libcamera::ControlInfoMap::ControlInfoMap ( const ControlInfoMap &  other )

default

Copy constructor, construct a ControlInfoMap from a copy of other.

Parameters

[in]

other

The other ControlInfoMap

ControlInfoMap() [2/3]

libcamera::ControlInfoMap::ControlInfoMap	(	std::initializer_list< Map::value_type >	init,
		const ControlIdMap &	idmap
	)

Construct a ControlInfoMap from an initializer list.

Parameters

[in]	init	The initializer list
[in]	idmap	The idmap used by the ControlInfoMap

ControlInfoMap() [3/3]

libcamera::ControlInfoMap::ControlInfoMap	(	Map &&	info,
		const ControlIdMap &	idmap
	)

Construct a ControlInfoMap from a plain map.

Parameters

[in]	info	The control info plain map
[in]	idmap	The idmap used by the ControlInfoMap

Construct a new ControlInfoMap and populate its contents with those of info using move semantics. Upon return the info map will be empty.

Member Function Documentation

at() [1/2]

ControlInfoMap::mapped_type & libcamera::ControlInfoMap::at

(

unsigned int

id

)

Access specified element by numerical ID.

Parameters

[in]

id

The numerical ID

Returns

A reference to the element whose ID is equal to id

at() [2/2]

const ControlInfoMap::mapped_type & libcamera::ControlInfoMap::at

(

unsigned int

id

)

const

Access specified element by numerical ID.

Parameters

[in]

id

The numerical ID

Returns

A const reference to the element whose ID is equal to id

count()

ControlInfoMap::size_type libcamera::ControlInfoMap::count

(

unsigned int

id

)

const

Count the number of elements matching a numerical ID.

Parameters

[in]

id

The numerical ID

Returns

The number of elements matching the numerical id

find() [1/2]

ControlInfoMap::iterator libcamera::ControlInfoMap::find

(

unsigned int

id

)

Find the element matching a numerical ID.

Parameters

[in]

id

The numerical ID

Returns

An iterator pointing to the element matching the numerical id, or end() if no such element exists

find() [2/2]

ControlInfoMap::const_iterator libcamera::ControlInfoMap::find

(

unsigned int

id

)

const

Find the element matching a numerical ID.

Parameters

[in]

id

The numerical ID

Returns

A const iterator pointing to the element matching the numerical id, or end() if no such element exists

idmap()

const ControlIdMap & libcamera::ControlInfoMap::idmap ( ) const

inline

Retrieve the ControlId map.

Constructing ControlList instances for V4L2 controls requires a ControlIdMap for the V4L2 device that the control list targets. This helper function returns a suitable idmap for that purpose.

Returns

The ControlId map

operator=()

ControlInfoMap & libcamera::ControlInfoMap::operator= ( const ControlInfoMap &  other )

default

Copy assignment operator, replace the contents with a copy of other.

Parameters

[in]

other

The other ControlInfoMap

Returns

A reference to the ControlInfoMap

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The documentation for this class was generated from the following files:

• include/libcamera/controls.h
• src/libcamera/controls.cpp