Jean-Michel Hautbois
4b2251509f
The RkISP1 ISP calculates a mean value for Y, Cr and Cb at each frame. There is a RGB mode which could theoretically give us the values for R, G and B directly, but it seems to be failing right now. Convert those values into R, G and B and estimate the gain to apply in a grey world. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Tested-by: Peter Griffin <peter.griffin@linaro.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
157 lines
4.5 KiB
C++
157 lines
4.5 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2021-2022, Ideas On Board
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*
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* ipa_context.cpp - RkISP1 IPA Context
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*/
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#include "ipa_context.h"
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/**
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* \file ipa_context.h
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* \brief Context and state information shared between the algorithms
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*/
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namespace libcamera::ipa::rkisp1 {
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/**
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* \struct IPASessionConfiguration
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* \brief Session configuration for the IPA module
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*
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* The session configuration contains all IPA configuration parameters that
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* remain constant during the capture session, from IPA module start to stop.
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* It is typically set during the configure() operation of the IPA module, but
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* may also be updated in the start() operation.
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*/
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/**
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* \struct IPAFrameContext
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* \brief Per-frame context for algorithms
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*
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* The frame context stores data specific to a single frame processed by the
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* IPA. Each frame processed by the IPA has a context associated with it,
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* accessible through the IPAContext structure.
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*
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* \todo Detail how to access contexts for a particular frame
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*
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* Each of the fields in the frame context belongs to either a specific
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* algorithm, or to the top-level IPA module. A field may be read by any
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* algorithm, but should only be written by its owner.
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*/
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/**
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* \struct IPAContext
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* \brief Global IPA context data shared between all algorithms
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*
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* \var IPAContext::configuration
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* \brief The IPA session configuration, immutable during the session
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*
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* \var IPAContext::frameContext
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* \brief The frame context for the frame being processed
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*
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* \todo While the frame context is supposed to be per-frame, this
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* single frame context stores data related to both the current frame
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* and the previous frames, with fields being updated as the algorithms
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* are run. This needs to be turned into real per-frame data storage.
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*/
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/**
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* \var IPASessionConfiguration::agc
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* \brief AGC parameters configuration of the IPA
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*
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* \var IPASessionConfiguration::agc.minShutterSpeed
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* \brief Minimum shutter speed supported with the configured sensor
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*
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* \var IPASessionConfiguration::agc.maxShutterSpeed
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* \brief Maximum shutter speed supported with the configured sensor
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*
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* \var IPASessionConfiguration::agc.minAnalogueGain
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* \brief Minimum analogue gain supported with the configured sensor
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*
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* \var IPASessionConfiguration::agc.maxAnalogueGain
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* \brief Maximum analogue gain supported with the configured sensor
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*
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* \var IPASessionConfiguration::agc.measureWindow
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* \brief AGC measure window
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*
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* \var IPASessionConfiguration::hw
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* \brief RkISP1-specific hardware information
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*
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* \var IPASessionConfiguration::hw.revision
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* \brief Hardware revision of the ISP
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*/
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/**
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* \var IPASessionConfiguration::awb
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* \brief AWB parameters configuration of the IPA
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*
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* \var IPASessionConfiguration::awb.measureWindow
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* \brief AWB measure window
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*/
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/**
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* \var IPASessionConfiguration::sensor
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* \brief Sensor-specific configuration of the IPA
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*
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* \var IPASessionConfiguration::sensor.lineDuration
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* \brief Line duration in microseconds
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*/
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/**
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* \var IPAFrameContext::agc
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* \brief Context for the Automatic Gain Control algorithm
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*
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* The exposure and gain determined are expected to be applied to the sensor
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* at the earliest opportunity.
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*
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* \var IPAFrameContext::agc.exposure
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* \brief Exposure time expressed as a number of lines
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*
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* \var IPAFrameContext::agc.gain
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* \brief Analogue gain multiplier
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*
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* The gain should be adapted to the sensor specific gain code before applying.
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*/
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/**
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* \var IPAFrameContext::awb
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* \brief Context for the Automatic White Balance algorithm
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*
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* \struct IPAFrameContext::awb.gains
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* \brief White balance gains
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*
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* \var IPAFrameContext::awb.gains.red
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* \brief White balance gain for R channel
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*
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* \var IPAFrameContext::awb.gains.green
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* \brief White balance gain for G channel
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*
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* \var IPAFrameContext::awb.gains.blue
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* \brief White balance gain for B channel
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*
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* \var IPAFrameContext::awb.temperatureK
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* \brief Estimated color temperature
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*/
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/**
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* \var IPAFrameContext::sensor
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* \brief Effective sensor values
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*
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* \var IPAFrameContext::sensor.exposure
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* \brief Exposure time expressed as a number of lines
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*
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* \var IPAFrameContext::sensor.gain
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* \brief Analogue gain multiplier
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*/
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/**
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* \var IPAFrameContext::frameCount
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* \brief Counter of requests queued to the IPA module
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*
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* The counter is reset to 0 when the IPA module is configured, and is
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* incremented for each request being queued, after calling the
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* Algorithm::prepare() function of all algorithms.
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*/
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} /* namespace libcamera::ipa::rkisp1 */
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