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, 59 insertions, 0 deletions

diff --git a/src/ipa/rpi/controller/camera_mode.h b/src/ipa/rpi/controller/camera_mode.h
new file mode 100644
index 00000000..63b11778
--- /dev/null
+++ b/src/ipa/rpi/controller/camera_mode.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * Copyright (C) 2019-2020, Raspberry Pi Ltd
+ *
+ * camera_mode.h - description of a particular operating mode of a sensor
+ */
+#pragma once
+
+#include <libcamera/transform.h>
+
+#include <libcamera/base/utils.h>
+
+/*
+ * Description of a "camera mode", holding enough information for control
+ * algorithms to adapt their behaviour to the different modes of the camera,
+ * including binning, scaling, cropping etc.
+ */
+
+struct CameraMode {
+	/* bit depth of the raw camera output */
+	uint32_t bitdepth;
+	/* size in pixels of frames in this mode */
+	uint16_t width;
+	uint16_t height;
+	/* size of full resolution uncropped frame ("sensor frame") */
+	uint16_t sensorWidth;
+	uint16_t sensorHeight;
+	/* binning factor (1 = no binning, 2 = 2-pixel binning etc.) */
+	uint8_t binX;
+	uint8_t binY;
+	/* location of top left pixel in the sensor frame */
+	uint16_t cropX;
+	uint16_t cropY;
+	/* scaling factor (so if uncropped, width*scaleX is sensorWidth) */
+	double scaleX;
+	double scaleY;
+	/* scaling of the noise compared to the native sensor mode */
+	double noiseFactor;
+	/* minimum and maximum line time and frame durations */
+	libcamera::utils::Duration minLineLength;
+	libcamera::utils::Duration maxLineLength;
+	libcamera::utils::Duration minFrameDuration;
+	libcamera::utils::Duration maxFrameDuration;
+	/* any camera transform *not* reflected already in the camera tuning */
+	libcamera::Transform transform;
+	/* minimum and maximum frame lengths in units of lines */
+	uint32_t minFrameLength;
+	uint32_t maxFrameLength;
+	/* sensitivity of this mode */
+	double sensitivity;
+	/* pixel clock rate */
+	uint64_t pixelRate;
+	/* Mode specific shutter speed limits */
+	libcamera::utils::Duration minShutter;
+	libcamera::utils::Duration maxShutter;
+	/* Mode specific analogue gain limits */
+	double minAnalogueGain;
+	double maxAnalogueGain;
+};