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, 49 insertions, 0 deletions

diff --git a/src/ipa/raspberrypi/controller/rpi/dpc.cpp b/src/ipa/raspberrypi/controller/rpi/dpc.cpp
new file mode 100644
index 00000000..d31fae97
--- /dev/null
+++ b/src/ipa/raspberrypi/controller/rpi/dpc.cpp
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ *
+ * dpc.cpp - DPC (defective pixel correction) control algorithm
+ */
+
+#include "../logging.hpp"
+#include "dpc.hpp"
+
+using namespace RPi;
+
+// We use the lux status so that we can apply stronger settings in darkness (if
+// necessary).
+
+#define NAME "rpi.dpc"
+
+Dpc::Dpc(Controller *controller)
+	: Algorithm(controller)
+{
+}
+
+char const *Dpc::Name() const
+{
+	return NAME;
+}
+
+void Dpc::Read(boost::property_tree::ptree const &params)
+{
+	config_.strength = params.get<int>("strength", 1);
+	if (config_.strength < 0 || config_.strength > 2)
+		throw std::runtime_error("Dpc: bad strength value");
+}
+
+void Dpc::Prepare(Metadata *image_metadata)
+{
+	DpcStatus dpc_status = {};
+	// Should we vary this with lux level or analogue gain? TBD.
+	dpc_status.strength = config_.strength;
+	RPI_LOG("Dpc: strength " << dpc_status.strength);
+	image_metadata->Set("dpc.status", dpc_status);
+}
+
+// Register algorithm with the system.
+static Algorithm *Create(Controller *controller)
+{
+	return (Algorithm *)new Dpc(controller);
+}
+static RegisterAlgorithm reg(NAME, &Create);