pipeline: ipa: raspberrypi: Refactor and move the Raspberry Pi code

Split the Raspberry Pi pipeline handler and IPA source code into common
and VC4/BCM2835 specific file structures.

For the pipeline handler, the common code files now live in
src/libcamera/pipeline/rpi/common/
and the VC4-specific files in src/libcamera/pipeline/rpi/vc4/.

For the IPA, the common code files now live in
src/ipa/rpi/{cam_helper,controller}/
and the vc4 specific files in src/ipa/rpi/vc4/. With this change, the
camera tuning files are now installed under share/libcamera/ipa/rpi/vc4/.

To build the pipeline and IPA, the meson configuration options have now
changed from "raspberrypi" to "rpi/vc4":

meson setup build -Dipas=rpi/vc4 -Dpipelines=rpi/vc4

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/ipa/rpi/controller/rpi/black_level.cpp b/src/ipa/rpi/controller/rpi/black_level.cpp
new file mode 100644
index 00000000..85baec3f
--- /dev/null
+++ b/src/ipa/rpi/controller/rpi/black_level.cpp
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi Ltd
+ *
+ * black_level.cpp - black level control algorithm
+ */
+
+#include <math.h>
+#include <stdint.h>
+
+#include <libcamera/base/log.h>
+
+#include "../black_level_status.h"
+
+#include "black_level.h"
+
+using namespace RPiController;
+using namespace libcamera;
+
+LOG_DEFINE_CATEGORY(RPiBlackLevel)
+
+#define NAME "rpi.black_level"
+
+BlackLevel::BlackLevel(Controller *controller)
+	: Algorithm(controller)
+{
+}
+
+char const *BlackLevel::name() const
+{
+	return NAME;
+}
+
+int BlackLevel::read(const libcamera::YamlObject &params)
+{
+	/* 64 in 10 bits scaled to 16 bits */
+	uint16_t blackLevel = params["black_level"].get<uint16_t>(4096);
+	blackLevelR_ = params["black_level_r"].get<uint16_t>(blackLevel);
+	blackLevelG_ = params["black_level_g"].get<uint16_t>(blackLevel);
+	blackLevelB_ = params["black_level_b"].get<uint16_t>(blackLevel);
+	LOG(RPiBlackLevel, Debug)
+		<< " Read black levels red " << blackLevelR_
+		<< " green " << blackLevelG_
+		<< " blue " << blackLevelB_;
+	return 0;
+}
+
+void BlackLevel::prepare(Metadata *imageMetadata)
+{
+	/*
+	 * Possibly we should think about doing this in a switchMode or
+	 * something?
+	 */
+	struct BlackLevelStatus status;
+	status.blackLevelR = blackLevelR_;
+	status.blackLevelG = blackLevelG_;
+	status.blackLevelB = blackLevelB_;
+	imageMetadata->set("black_level.status", status);
+}
+
+/* Register algorithm with the system. */
+static Algorithm *create(Controller *controller)
+{
+	return new BlackLevel(controller);
+}
+static RegisterAlgorithm reg(NAME, &create);