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, 43 insertions, 0 deletions

diff --git a/src/ipa/rpi/controller/device_status.h b/src/ipa/rpi/controller/device_status.h
new file mode 100644
index 00000000..c45db749
--- /dev/null
+++ b/src/ipa/rpi/controller/device_status.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019-2021, Raspberry Pi Ltd
+ *
+ * device_status.h - device (image sensor) status
+ */
+#pragma once
+
+#include <iostream>
+#include <optional>
+
+#include <libcamera/base/utils.h>
+
+/*
+ * Definition of "device metadata" which stores things like shutter time and
+ * analogue gain that downstream control algorithms will want to know.
+ */
+
+struct DeviceStatus {
+	DeviceStatus()
+		: shutterSpeed(std::chrono::seconds(0)), frameLength(0),
+		  lineLength(std::chrono::seconds(0)), analogueGain(0.0)
+	{
+	}
+
+	friend std::ostream &operator<<(std::ostream &out, const DeviceStatus &d);
+
+	/* time shutter is open */
+	libcamera::utils::Duration shutterSpeed;
+	/* frame length given in number of lines */
+	uint32_t frameLength;
+	/* line length for the current frame */
+	libcamera::utils::Duration lineLength;
+	double analogueGain;
+	/* 1.0/distance-in-metres */
+	std::optional<double> lensPosition;
+	/* 1/f so that brightness quadruples when this doubles */
+	std::optional<double> aperture;
+	/* proportional to brightness with 0 = no flash, 1 = maximum flash */
+	std::optional<double> flashIntensity;
+	/* Sensor reported temperature value (in degrees) */
+	std::optional<double> sensorTemperature;
+};