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, 197 deletions

diff --git a/src/ipa/raspberrypi/cam_helper_imx477.cpp b/src/ipa/raspberrypi/cam_helper_imx477.cpp
deleted file mode 100644
index bc769ca7..00000000
--- a/src/ipa/raspberrypi/cam_helper_imx477.cpp
+++ /dev/null
@@ -1,197 +0,0 @@
-/* SPDX-License-Identifier: BSD-2-Clause */
-/*
- * Copyright (C) 2020, Raspberry Pi Ltd
- *
- * cam_helper_imx477.cpp - camera helper for imx477 sensor
- */
-
-#include <algorithm>
-#include <assert.h>
-#include <cmath>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include <libcamera/base/log.h>
-
-#include "cam_helper.h"
-#include "md_parser.h"
-
-using namespace RPiController;
-using namespace libcamera;
-using libcamera::utils::Duration;
-
-namespace libcamera {
-LOG_DECLARE_CATEGORY(IPARPI)
-}
-
-/*
- * We care about two gain registers and a pair of exposure registers. Their
- * I2C addresses from the Sony IMX477 datasheet:
- */
-constexpr uint32_t expHiReg = 0x0202;
-constexpr uint32_t expLoReg = 0x0203;
-constexpr uint32_t gainHiReg = 0x0204;
-constexpr uint32_t gainLoReg = 0x0205;
-constexpr uint32_t frameLengthHiReg = 0x0340;
-constexpr uint32_t frameLengthLoReg = 0x0341;
-constexpr uint32_t lineLengthHiReg = 0x0342;
-constexpr uint32_t lineLengthLoReg = 0x0343;
-constexpr uint32_t temperatureReg = 0x013a;
-constexpr std::initializer_list<uint32_t> registerList =
-	{ expHiReg, expLoReg, gainHiReg, gainLoReg, frameLengthHiReg, frameLengthLoReg,
-	  lineLengthHiReg, lineLengthLoReg, temperatureReg };
-
-class CamHelperImx477 : public CamHelper
-{
-public:
-	CamHelperImx477();
-	uint32_t gainCode(double gain) const override;
-	double gain(uint32_t gainCode) const override;
-	void prepare(libcamera::Span<const uint8_t> buffer, Metadata &metadata) override;
-	std::pair<uint32_t, uint32_t> getBlanking(Duration &exposure, Duration minFrameDuration,
-						  Duration maxFrameDuration) const override;
-	void getDelays(int &exposureDelay, int &gainDelay,
-		       int &vblankDelay, int &hblankDelay) const override;
-	bool sensorEmbeddedDataPresent() const override;
-
-private:
-	/*
-	 * Smallest difference between the frame length and integration time,
-	 * in units of lines.
-	 */
-	static constexpr int frameIntegrationDiff = 22;
-	/* Maximum frame length allowable for long exposure calculations. */
-	static constexpr int frameLengthMax = 0xffdc;
-	/* Largest long exposure scale factor given as a left shift on the frame length. */
-	static constexpr int longExposureShiftMax = 7;
-
-	void populateMetadata(const MdParser::RegisterMap &registers,
-			      Metadata &metadata) const override;
-};
-
-CamHelperImx477::CamHelperImx477()
-	: CamHelper(std::make_unique<MdParserSmia>(registerList), frameIntegrationDiff)
-{
-}
-
-uint32_t CamHelperImx477::gainCode(double gain) const
-{
-	return static_cast<uint32_t>(1024 - 1024 / gain);
-}
-
-double CamHelperImx477::gain(uint32_t gainCode) const
-{
-	return 1024.0 / (1024 - gainCode);
-}
-
-void CamHelperImx477::prepare(libcamera::Span<const uint8_t> buffer, Metadata &metadata)
-{
-	MdParser::RegisterMap registers;
-	DeviceStatus deviceStatus;
-
-	if (metadata.get("device.status", deviceStatus)) {
-		LOG(IPARPI, Error) << "DeviceStatus not found from DelayedControls";
-		return;
-	}
-
-	parseEmbeddedData(buffer, metadata);
-
-	/*
-	 * The DeviceStatus struct is first populated with values obtained from
-	 * DelayedControls. If this reports frame length is > frameLengthMax,
-	 * it means we are using a long exposure mode. Since the long exposure
-	 * scale factor is not returned back through embedded data, we must rely
-	 * on the existing exposure lines and frame length values returned by
-	 * DelayedControls.
-	 *
-	 * Otherwise, all values are updated with what is reported in the
-	 * embedded data.
-	 */
-	if (deviceStatus.frameLength > frameLengthMax) {
-		DeviceStatus parsedDeviceStatus;
-
-		metadata.get("device.status", parsedDeviceStatus);
-		parsedDeviceStatus.shutterSpeed = deviceStatus.shutterSpeed;
-		parsedDeviceStatus.frameLength = deviceStatus.frameLength;
-		metadata.set("device.status", parsedDeviceStatus);
-
-		LOG(IPARPI, Debug) << "Metadata updated for long exposure: "
-				   << parsedDeviceStatus;
-	}
-}
-
-std::pair<uint32_t, uint32_t> CamHelperImx477::getBlanking(Duration &exposure,
-							   Duration minFrameDuration,
-							   Duration maxFrameDuration) const
-{
-	uint32_t frameLength, exposureLines;
-	unsigned int shift = 0;
-
-	auto [vblank, hblank] = CamHelper::getBlanking(exposure, minFrameDuration,
-						       maxFrameDuration);
-
-	frameLength = mode_.height + vblank;
-	Duration lineLength = hblankToLineLength(hblank);
-
-	/*
-	 * Check if the frame length calculated needs to be setup for long
-	 * exposure mode. This will require us to use a long exposure scale
-	 * factor provided by a shift operation in the sensor.
-	 */
-	while (frameLength > frameLengthMax) {
-		if (++shift > longExposureShiftMax) {
-			shift = longExposureShiftMax;
-			frameLength = frameLengthMax;
-			break;
-		}
-		frameLength >>= 1;
-	}
-
-	if (shift) {
-		/* Account for any rounding in the scaled frame length value. */
-		frameLength <<= shift;
-		exposureLines = CamHelperImx477::exposureLines(exposure, lineLength);
-		exposureLines = std::min(exposureLines, frameLength - frameIntegrationDiff);
-		exposure = CamHelperImx477::exposure(exposureLines, lineLength);
-	}
-
-	return { frameLength - mode_.height, hblank };
-}
-
-void CamHelperImx477::getDelays(int &exposureDelay, int &gainDelay,
-				int &vblankDelay, int &hblankDelay) const
-{
-	exposureDelay = 2;
-	gainDelay = 2;
-	vblankDelay = 3;
-	hblankDelay = 3;
-}
-
-bool CamHelperImx477::sensorEmbeddedDataPresent() const
-{
-	return true;
-}
-
-void CamHelperImx477::populateMetadata(const MdParser::RegisterMap &registers,
-				       Metadata &metadata) const
-{
-	DeviceStatus deviceStatus;
-
-	deviceStatus.lineLength = lineLengthPckToDuration(registers.at(lineLengthHiReg) * 256 +
-							  registers.at(lineLengthLoReg));
-	deviceStatus.shutterSpeed = exposure(registers.at(expHiReg) * 256 + registers.at(expLoReg),
-					     deviceStatus.lineLength);
-	deviceStatus.analogueGain = gain(registers.at(gainHiReg) * 256 + registers.at(gainLoReg));
-	deviceStatus.frameLength = registers.at(frameLengthHiReg) * 256 + registers.at(frameLengthLoReg);
-	deviceStatus.sensorTemperature = std::clamp<int8_t>(registers.at(temperatureReg), -20, 80);
-
-	metadata.set("device.status", deviceStatus);
-}
-
-static CamHelper *create()
-{
-	return new CamHelperImx477();
-}
-
-static RegisterCamHelper reg("imx477", &create);