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To prepare for dynamic instantiation of algorithms from the tuning file, register the algorithms with the Module class. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2021, Google inc.
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*
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* blc.cpp - IPU3 Black Level Correction control
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*/
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#include "blc.h"
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#include <string.h>
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/**
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* \file blc.h
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* \brief IPU3 Black Level Correction control
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*/
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namespace libcamera {
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namespace ipa::ipu3::algorithms {
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/**
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* \class BlackLevelCorrection
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* \brief A class to handle black level correction
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*
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* The pixels output by the camera normally include a black level, because
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* sensors do not always report a signal level of '0' for black. Pixels at or
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* below this level should be considered black. To achieve that, the ImgU BLC
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* algorithm subtracts a configurable offset from all pixels.
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*
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* The black level can be measured at runtime from an optical dark region of the
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* camera sensor, or measured during the camera tuning process. The first option
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* isn't currently supported.
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*/
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BlackLevelCorrection::BlackLevelCorrection()
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{
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}
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/**
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* \brief Fill in the parameter structure, and enable black level correction
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* \param context The shared IPA context
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* \param params The IPU3 parameters
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*
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* Populate the IPU3 parameter structure with the correction values for each
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* channel and enable the corresponding ImgU block processing.
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*/
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void BlackLevelCorrection::prepare([[maybe_unused]] IPAContext &context,
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ipu3_uapi_params *params)
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{
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/*
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* The Optical Black Level correction values
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* \todo The correction values should come from sensor specific
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* tuning processes. This is a first rough approximation.
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*/
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params->obgrid_param.gr = 64;
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params->obgrid_param.r = 64;
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params->obgrid_param.b = 64;
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params->obgrid_param.gb = 64;
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/* Enable the custom black level correction processing */
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params->use.obgrid = 1;
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params->use.obgrid_param = 1;
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}
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REGISTER_IPA_ALGORITHM(BlackLevelCorrection, "BlackLevelCorrection")
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} /* namespace ipa::ipu3::algorithms */
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} /* namespace libcamera */
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