libcamera::ipa::ipu3::algorithms::ToneMapping Class Reference

A class to handle tone mapping based on gamma. More...

Inheritance diagram for libcamera::ipa::ipu3::algorithms::ToneMapping:

Collaboration diagram for libcamera::ipa::ipu3::algorithms::ToneMapping:

Public Member Functions
int	configure (IPAContext &context, const IPAConfigInfo &configInfo) override
	Configure the tone mapping given a configInfo. More...
void	prepare (IPAContext &context, const uint32_t frame, IPAFrameContext &frameContext, ipu3_uapi_params *params) override
	Fill in the parameter structure, and enable gamma control. More...
void	process (IPAContext &context, const uint32_t frame, IPAFrameContext &frameContext, const ipu3_uapi_stats_3a *stats, ControlList &metadata) override
	Calculate the tone mapping look up table. More...
Public Member Functions inherited from libcamera::ipa::Algorithm< _Module >
virtual int	init ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const YamlObject &tuningData)
	Initialize the Algorithm with tuning data. More...
virtual int	configure ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const typename Module::Config &configInfo)
	Configure the Algorithm given an IPAConfigInfo. More...
virtual void	queueRequest ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] typename Module::FrameContext &frameContext, [[maybe_unused]] const ControlList &controls)
	Provide control values to the algorithm. More...
virtual void	prepare ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] typename Module::FrameContext &frameContext, [[maybe_unused]] typename Module::Params *params)
	Fill the params buffer with ISP processing parameters for a frame. More...
virtual void	process ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] typename Module::FrameContext &frameContext, [[maybe_unused]] const typename Module::Stats *stats, [[maybe_unused]] ControlList &metadata)
	Process ISP statistics, and run algorithm operations. More...

Additional Inherited Members
Public Types inherited from libcamera::ipa::Algorithm< _Module >
using	Module = _Module
	The IPA module type for this class of algorithms.

Detailed Description

A class to handle tone mapping based on gamma.

This algorithm improves the image dynamic using a look-up table which is generated based on a gamma parameter.

Member Function Documentation

configure()

int libcamera::ipa::ipu3::algorithms::ToneMapping::configure ( IPAContext &  context, const IPAConfigInfo &  configInfo  )

override

Configure the tone mapping given a configInfo.

Parameters

[in]	context	The shared IPA context
[in]	configInfo	The IPA configuration data

Returns

0

prepare()

void libcamera::ipa::ipu3::algorithms::ToneMapping::prepare ( IPAContext &  context, const uint32_t  frame, IPAFrameContext &  frameContext, ipu3_uapi_params *  params  )

override

Fill in the parameter structure, and enable gamma control.

Parameters

[in]	context	The shared IPA context
[in]	frame	The frame context sequence number
[in]	frameContext	The FrameContext for this frame
[out]	params	The IPU3 parameters

Populate the IPU3 parameter structure with our tone mapping look up table and enable the gamma control module in the processing blocks.

process()

void libcamera::ipa::ipu3::algorithms::ToneMapping::process ( IPAContext &  context, const uint32_t  frame, IPAFrameContext &  frameContext, const ipu3_uapi_stats_3a *  stats, ControlList &  metadata  )

override

Calculate the tone mapping look up table.

Parameters

[in]	context	The shared IPA context
[in]	frame	The current frame sequence number
[in]	frameContext	The current frame context
[in]	stats	The IPU3 statistics and ISP results
[out]	metadata	Metadata for the frame, to be filled by the algorithm

The tone mapping look up table is generated as an inverse power curve from our gamma setting.

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

• src/ipa/ipu3/algorithms/tone_mapping.h
• src/ipa/ipu3/algorithms/tone_mapping.cpp