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, 0 insertions, 132 deletions

diff --git a/src/ipa/raspberrypi/cam_helper.h b/src/ipa/raspberrypi/cam_helper.h
deleted file mode 100644
index b3f8c980..00000000
--- a/src/ipa/raspberrypi/cam_helper.h
+++ /dev/null
@@ -1,132 +0,0 @@
-/* SPDX-License-Identifier: BSD-2-Clause */
-/*
- * Copyright (C) 2019, Raspberry Pi Ltd
- *
- * cam_helper.h - helper class providing camera information
- */
-#pragma once
-
-#include <memory>
-#include <string>
-#include <utility>
-
-#include <libcamera/base/span.h>
-#include <libcamera/base/utils.h>
-
-#include "camera_mode.h"
-#include "controller/controller.h"
-#include "controller/metadata.h"
-#include "md_parser.h"
-
-#include "libcamera/internal/v4l2_videodevice.h"
-
-namespace RPiController {
-
-/*
- * The CamHelper class provides a number of facilities that anyone trying
- * to drive a camera will need to know, but which are not provided by the
- * standard driver framework. Specifically, it provides:
- *
- * A "CameraMode" structure to describe extra information about the chosen
- * mode of the driver. For example, how it is cropped from the full sensor
- * area, how it is scaled, whether pixels are averaged compared to the full
- * resolution.
- *
- * The ability to convert between number of lines of exposure and actual
- * exposure time, and to convert between the sensor's gain codes and actual
- * gains.
- *
- * A function to return the number of frames of delay between updating exposure,
- * analogue gain and vblanking, and for the changes to take effect. For many
- * sensors these take the values 2, 1 and 2 respectively, but sensors that are
- * different will need to over-ride the default function provided.
- *
- * A function to query if the sensor outputs embedded data that can be parsed.
- *
- * A function to return the sensitivity of a given camera mode.
- *
- * A parser to parse the embedded data buffers provided by some sensors (for
- * example, the imx219 does; the ov5647 doesn't). This allows us to know for
- * sure the exposure and gain of the frame we're looking at. CamHelper
- * provides functions for converting analogue gains to and from the sensor's
- * native gain codes.
- *
- * Finally, a set of functions that determine how to handle the vagaries of
- * different camera modules on start-up or when switching modes. Some
- * modules may produce one or more frames that are not yet correctly exposed,
- * or where the metadata may be suspect. We have the following functions:
- * HideFramesStartup(): Tell the pipeline handler not to return this many
- *     frames at start-up. This can also be used to hide initial frames
- *     while the AGC and other algorithms are sorting themselves out.
- * HideFramesModeSwitch(): Tell the pipeline handler not to return this
- *     many frames after a mode switch (other than start-up). Some sensors
- *     may produce innvalid frames after a mode switch; others may not.
- * MistrustFramesStartup(): At start-up a sensor may return frames for
- *    which we should not run any control algorithms (for example, metadata
- *    may be invalid).
- * MistrustFramesModeSwitch(): The number of frames, after a mode switch
- *    (other than start-up), for which control algorithms should not run
- *    (for example, metadata may be unreliable).
- */
-
-class CamHelper
-{
-public:
-	static CamHelper *create(std::string const &camName);
-	CamHelper(std::unique_ptr<MdParser> parser, unsigned int frameIntegrationDiff);
-	virtual ~CamHelper();
-	void setCameraMode(const CameraMode &mode);
-	virtual void prepare(libcamera::Span<const uint8_t> buffer,
-			     Metadata &metadata);
-	virtual void process(StatisticsPtr &stats, Metadata &metadata);
-	virtual uint32_t exposureLines(const libcamera::utils::Duration exposure,
-				       const libcamera::utils::Duration lineLength) const;
-	virtual libcamera::utils::Duration exposure(uint32_t exposureLines,
-						    const libcamera::utils::Duration lineLength) const;
-	virtual std::pair<uint32_t, uint32_t> getBlanking(libcamera::utils::Duration &exposure,
-							  libcamera::utils::Duration minFrameDuration,
-							  libcamera::utils::Duration maxFrameDuration) const;
-	libcamera::utils::Duration hblankToLineLength(uint32_t hblank) const;
-	uint32_t lineLengthToHblank(const libcamera::utils::Duration &duration) const;
-	libcamera::utils::Duration lineLengthPckToDuration(uint32_t lineLengthPck) const;
-	virtual uint32_t gainCode(double gain) const = 0;
-	virtual double gain(uint32_t gainCode) const = 0;
-	virtual void getDelays(int &exposureDelay, int &gainDelay,
-			       int &vblankDelay, int &hblankDelay) const;
-	virtual bool sensorEmbeddedDataPresent() const;
-	virtual double getModeSensitivity(const CameraMode &mode) const;
-	virtual unsigned int hideFramesStartup() const;
-	virtual unsigned int hideFramesModeSwitch() const;
-	virtual unsigned int mistrustFramesStartup() const;
-	virtual unsigned int mistrustFramesModeSwitch() const;
-
-protected:
-	void parseEmbeddedData(libcamera::Span<const uint8_t> buffer,
-			       Metadata &metadata);
-	virtual void populateMetadata(const MdParser::RegisterMap &registers,
-				      Metadata &metadata) const;
-
-	std::unique_ptr<MdParser> parser_;
-	CameraMode mode_;
-
-private:
-	/*
-	 * Smallest difference between the frame length and integration time,
-	 * in units of lines.
-	 */
-	unsigned int frameIntegrationDiff_;
-};
-
-/*
- * This is for registering camera helpers with the system, so that the
- * CamHelper::Create function picks them up automatically.
- */
-
-typedef CamHelper *(*CamHelperCreateFunc)();
-struct RegisterCamHelper
-{
-	RegisterCamHelper(char const *camName,
-			  CamHelperCreateFunc createFunc);
-};
-
-} /* namespace RPi */