libcamera  v0.4.0+139-39419ce4
Supporting cameras in Linux since 2019
Public Member Functions | List of all members
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:
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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]contextThe shared IPA context
[in]configInfoThe 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]contextThe shared IPA context
[in]frameThe frame context sequence number
[in]frameContextThe FrameContext for this frame
[out]paramsThe 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]contextThe shared IPA context
[in]frameThe current frame sequence number
[in]frameContextThe current frame context
[in]statsThe IPU3 statistics and ISP results
[out]metadataMetadata 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.


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