libcamera: ipa: Raspberry Pi IPA

Initial implementation of the Raspberry Pi (BCM2835) libcamera IPA and
associated libraries.

All code is licensed under the BSD-2-Clause terms.
Copyright (c) 2019-2020 Raspberry Pi Trading Ltd.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/src/ipa/raspberrypi/controller/rpi/sharpen.cpp b/src/ipa/raspberrypi/controller/rpi/sharpen.cpp
new file mode 100644
index 00000000..1f07bb62
--- /dev/null
+++ b/src/ipa/raspberrypi/controller/rpi/sharpen.cpp
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ *
+ * sharpen.cpp - sharpening control algorithm
+ */
+
+#include <math.h>
+
+#include "../logging.hpp"
+#include "../sharpen_status.h"
+
+#include "sharpen.hpp"
+
+using namespace RPi;
+
+#define NAME "rpi.sharpen"
+
+Sharpen::Sharpen(Controller *controller)
+	: Algorithm(controller)
+{
+}
+
+char const *Sharpen::Name() const
+{
+	return NAME;
+}
+
+void Sharpen::SwitchMode(CameraMode const &camera_mode)
+{
+	// can't be less than one, right?
+	mode_factor_ = std::max(1.0, camera_mode.noise_factor);
+}
+
+void Sharpen::Read(boost::property_tree::ptree const &params)
+{
+	RPI_LOG(Name());
+	threshold_ = params.get<double>("threshold", 1.0);
+	strength_ = params.get<double>("strength", 1.0);
+	limit_ = params.get<double>("limit", 1.0);
+}
+
+void Sharpen::Prepare(Metadata *image_metadata)
+{
+	double mode_factor = mode_factor_;
+	struct SharpenStatus status;
+	// Binned modes seem to need the sharpening toned down with this
+	// pipeline.
+	status.threshold = threshold_ * mode_factor;
+	status.strength = strength_ / mode_factor;
+	status.limit = limit_ / mode_factor;
+	image_metadata->Set("sharpen.status", status);
+}
+
+// Register algorithm with the system.
+static Algorithm *Create(Controller *controller)
+{
+	return new Sharpen(controller);
+}
+static RegisterAlgorithm reg(NAME, &Create);