agc.h File Reference

libipa AGC algorithm More...

#include <optional>
#include <stdint.h>
#include <utility>
#include <variant>
#include <vector>
#include <linux/v4l2-controls.h>
#include <libcamera/base/utils.h>
#include <libcamera/control_ids.h>
#include <libcamera/controls.h>
#include <libcamera/geometry.h>
#include "agc_mean_luminance.h"
#include "agc_msv.h"
#include "camera_sensor_helper.h"

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Classes
struct	libcamera::ipa::agc::Session
	Session configuration for AgcAlgorithm. More...
struct	libcamera::ipa::agc::ActiveState
	Active state for AgcAlgorithm. More...
struct	libcamera::ipa::agc::FrameContext
	Per-frame context for AgcAlgorithm. More...
class	libcamera::ipa::AgcAlgorithm
	libIPA LSC algorithm algorithm More...
struct	libcamera::ipa::AgcAlgorithm::ConfigurationParams
	Parameters for AgcAlgorithm::configure() More...
struct	libcamera::ipa::AgcAlgorithm::ProcessParams
	Parameters for AgcAlgorithm::process() More...

Namespaces
namespace	libcamera
	Top-level libcamera namespace.
namespace	libcamera::ipa
	The IPA (Image Processing Algorithm) namespace.

Functions
std::pair< uint32_t, double >	libcamera::ipa::agc::extractControls (const ControlList &controls, const CameraSensorHelper *sensor)
void	libcamera::ipa::agc::prepareControls (ControlList &controls, const CameraSensorHelper *sensor, uint32_t exposure, double gain)

Detailed Description

libipa AGC algorithm

Function Documentation

extractControls()

libcamera::ipa::agc::extractControls ( const ControlList &  controls, const CameraSensorHelper *  sensor  )

inline

Parameters

[in]	controls	The controls list to extract from
[in]	sensor	The CameraSensorHelper

This function extracts V4L2_CID_EXPOSURE and V4L2_CID_ANALOGUE_GAIN from controls and then returns the exposure and gain values. The gain code is mapped to the real gain value if sensor is provided, otherwise the gain code is returned.

Returns

A pair of exposure and analogue gain extracted from controls

prepareControls()

libcamera::ipa::agc::prepareControls ( ControlList &  controls, const CameraSensorHelper *  sensor, uint32_t  exposure, double  gain  )

inline

Parameters

[out]	controls	The controls list to populate
[in]	sensor	The CameraSensorHelper
[in]	exposure	The exposure (in lines)
[in]	gain	The analogue gain

This function sets V4L2_CID_EXPOSURE and V4L2_CID_ANALOGUE_GAIN in controls. The gain is mapped to the gain code if sensor is provided, otherwise the gain value will be used directly.