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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2024, Ideas On Board
* Copyright (C) 2024-2025, Red Hat Inc.
*
* Color correction matrix
*/
#include "ccm.h"
#include <libcamera/base/log.h>
#include <libcamera/base/utils.h>
#include <libcamera/control_ids.h>
namespace {
constexpr unsigned int kTemperatureThreshold = 100;
}
namespace libcamera {
namespace ipa::soft::algorithms {
LOG_DEFINE_CATEGORY(IPASoftCcm)
int Ccm::init([[maybe_unused]] IPAContext &context, const YamlObject &tuningData)
{
int ret = ccm_.readYaml(tuningData["ccms"], "ct", "ccm");
if (ret < 0) {
LOG(IPASoftCcm, Error)
<< "Failed to parse 'ccm' parameter from tuning file.";
return ret;
}
context.ccmEnabled = true;
return 0;
}
void Ccm::prepare(IPAContext &context, const uint32_t frame,
IPAFrameContext &frameContext, [[maybe_unused]] DebayerParams *params)
{
const unsigned int ct = context.activeState.awb.temperatureK;
/* Change CCM only on bigger temperature changes. */
if (frame > 0 &&
utils::abs_diff(ct, lastCt_) < kTemperatureThreshold) {
frameContext.ccm.ccm = context.activeState.ccm.ccm;
context.activeState.ccm.changed = false;
return;
}
lastCt_ = ct;
Matrix<float, 3, 3> ccm = ccm_.getInterpolated(ct);
context.activeState.ccm.ccm = ccm;
frameContext.ccm.ccm = ccm;
context.activeState.ccm.changed = true;
}
void Ccm::process([[maybe_unused]] IPAContext &context,
[[maybe_unused]] const uint32_t frame,
IPAFrameContext &frameContext,
[[maybe_unused]] const SwIspStats *stats,
ControlList &metadata)
{
metadata.set(controls::ColourCorrectionMatrix, frameContext.ccm.ccm.data());
}
REGISTER_IPA_ALGORITHM(Ccm, "Ccm")
} /* namespace ipa::soft::algorithms */
} /* namespace libcamera */
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