Inheritance diagram for libcamera::ipa::V4L2StatsBase:

Public Member Functions
	V4L2StatsBase (Span< uint8_t > data, unsigned int version)
	Construct an instance of V4L2StatsBase.

Span< const uint8_t >	block (unsigned int blockType, size_t blockSize) const
	Retrieve an ISP statistics block and return a reference to it.

constexpr	operator bool ()
	Retrieve if a V4L2StatsBase has been successfully constructed.

Detailed Description

Base class for V4L2Stats.

The V4L2StatsBase is an integral part of V4L2Stats. It serves as a container for all code that does not depend on the V4L2Stats template arguments, to avoid duplicate copies of inline code.

Constructor & Destructor Documentation

◆ V4L2StatsBase()

libcamera::ipa::V4L2StatsBase::V4L2StatsBase	(	Span< uint8_t >	data,
		unsigned int	version
	)

Construct an instance of V4L2StatsBase.

Parameters

[in]	data	Reference to the v4l2-buffer memory mapped area
[in]	version	The ISP parameters version the implementation supports

Parse the statistics buffer and construct a cache that maps a block type to the memory location of a statistics block in the buffer.

After construction users of this class shall check the validity of the constructed instance using operator bool().

Member Function Documentation

◆ block()

Span< const uint8_t > libcamera::ipa::V4L2StatsBase::block	(	unsigned int	blockType,
		size_t	blockSize
	)		const

Retrieve an ISP statistics block and return a reference to it.

Parameters

[in]	blockType	The kernel-defined ISP block identifier, used to identify the block header
[in]	blockSize	The ISP statistics block size, for validation

Retrieve a span to the statistics block memory location by accessing the cache built at class construction time.

Returns: The memory location of the ISP statistics block, or an empty Span if blockType is not supported

◆ operator bool()

libcamera::ipa::V4L2StatsBase::operator bool ( )

inlineexplicitconstexpr

Retrieve if a V4L2StatsBase has been successfully constructed.

Returns: True if the instance has been constructed successfully, false otherwise

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