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, 37 insertions, 0 deletions

diff --git a/src/ipa/rpi/controller/agc_status.h b/src/ipa/rpi/controller/agc_status.h
new file mode 100644
index 00000000..6abf09d9
--- /dev/null
+++ b/src/ipa/rpi/controller/agc_status.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019, Raspberry Pi Ltd
+ *
+ * agc_status.h - AGC/AEC control algorithm status
+ */
+#pragma once
+
+#include <libcamera/base/utils.h>
+
+/*
+ * The AGC algorithm should post the following structure into the image's
+ * "agc.status" metadata.
+ */
+
+/*
+ * Note: total_exposure_value will be reported as zero until the algorithm has
+ * seen statistics and calculated meaningful values. The contents should be
+ * ignored until then.
+ */
+
+struct AgcStatus {
+	libcamera::utils::Duration totalExposureValue; /* value for all exposure and gain for this image */
+	libcamera::utils::Duration targetExposureValue; /* (unfiltered) target total exposure AGC is aiming for */
+	libcamera::utils::Duration shutterTime;
+	double analogueGain;
+	char exposureMode[32];
+	char constraintMode[32];
+	char meteringMode[32];
+	double ev;
+	libcamera::utils::Duration flickerPeriod;
+	int floatingRegionEnable;
+	libcamera::utils::Duration fixedShutter;
+	double fixedAnalogueGain;
+	double digitalGain;
+	int locked;
+};