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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021-2022, Ideas On Board
+ *
+ * cproc.cpp - RkISP1 Color Processing control
+ */
+
+#include "cproc.h"
+
+#include <algorithm>
+#include <cmath>
+
+#include <libcamera/base/log.h>
+
+#include <libcamera/control_ids.h>
+
+/**
+ * \file cproc.h
+ */
+
+namespace libcamera {
+
+namespace ipa::rkisp1::algorithms {
+
+/**
+ * \class ColorProcessing
+ * \brief RkISP1 Color Processing control
+ *
+ * The ColorProcessing algorithm is responsible for applying brightness,
+ * contrast and saturation corrections. The values are directly provided
+ * through requests by the corresponding controls.
+ */
+
+LOG_DEFINE_CATEGORY(RkISP1CProc)
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::queueRequest
+ */
+void ColorProcessing::queueRequest(IPAContext &context,
+ [[maybe_unused]] const uint32_t frame,
+ const ControlList &controls)
+{
+ auto &cproc = context.frameContext.cproc;
+
+ const auto &brightness = controls.get(controls::Brightness);
+ if (brightness) {
+ cproc.brightness = std::clamp<int>(std::lround(*brightness * 128), -128, 127);
+ cproc.updateParams = true;
+
+ LOG(RkISP1CProc, Debug) << "Set brightness to " << *brightness;
+ }
+
+ const auto &contrast = controls.get(controls::Contrast);
+ if (contrast) {
+ cproc.contrast = std::clamp<int>(std::lround(*contrast * 128), 0, 255);
+ cproc.updateParams = true;
+
+ LOG(RkISP1CProc, Debug) << "Set contrast to " << *contrast;
+ }
+
+ const auto saturation = controls.get(controls::Saturation);
+ if (saturation) {
+ cproc.saturation = std::clamp<int>(std::lround(*saturation * 128), 0, 255);
+ cproc.updateParams = true;
+
+ LOG(RkISP1CProc, Debug) << "Set saturation to " << *saturation;
+ }
+}
+
+/**
+ * \copydoc libcamera::ipa::Algorithm::prepare
+ */
+void ColorProcessing::prepare(IPAContext &context,
+ rkisp1_params_cfg *params)
+{
+ auto &cproc = context.frameContext.cproc;
+
+ /* Check if the algorithm configuration has been updated. */
+ if (!cproc.updateParams)
+ return;
+
+ cproc.updateParams = false;
+
+ params->others.cproc_config.brightness = cproc.brightness;
+ params->others.cproc_config.contrast = cproc.contrast;
+ params->others.cproc_config.sat = cproc.saturation;
+
+ params->module_en_update |= RKISP1_CIF_ISP_MODULE_CPROC;
+ params->module_ens |= RKISP1_CIF_ISP_MODULE_CPROC;
+ params->module_cfg_update |= RKISP1_CIF_ISP_MODULE_CPROC;
+}
+
+REGISTER_IPA_ALGORITHM(ColorProcessing, "ColorProcessing")
+
+} /* namespace ipa::rkisp1::algorithms */
+
+} /* namespace libcamera */