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, 83 deletions

diff --git a/src/ipa/raspberrypi/cam_helper_imx296.cpp b/src/ipa/raspberrypi/cam_helper_imx296.cpp
deleted file mode 100644
index ecb845e7..00000000
--- a/src/ipa/raspberrypi/cam_helper_imx296.cpp
+++ /dev/null
@@ -1,83 +0,0 @@
-/* SPDX-License-Identifier: BSD-2-Clause */
-/*
- * Copyright (C) 2020, Raspberry Pi Ltd
- *
- * cam_helper_imx296.cpp - Camera helper for IMX296 sensor
- */
-
-#include <algorithm>
-#include <cmath>
-#include <stddef.h>
-
-#include "cam_helper.h"
-
-using namespace RPiController;
-using libcamera::utils::Duration;
-using namespace std::literals::chrono_literals;
-
-class CamHelperImx296 : public CamHelper
-{
-public:
-	CamHelperImx296();
-	uint32_t gainCode(double gain) const override;
-	double gain(uint32_t gainCode) const override;
-	uint32_t exposureLines(const Duration exposure, const Duration lineLength) const override;
-	Duration exposure(uint32_t exposureLines, const Duration lineLength) const override;
-	void getDelays(int &exposureDelay, int &gainDelay,
-		       int &vblankDelay, int &hblankDelay) const override;
-
-private:
-	static constexpr uint32_t minExposureLines = 1;
-	static constexpr uint32_t maxGainCode = 239;
-	static constexpr Duration timePerLine = 550.0 / 37.125e6 * 1.0s;
-
-	/*
-	 * Smallest difference between the frame length and integration time,
-	 * in units of lines.
-	 */
-	static constexpr int frameIntegrationDiff = 4;
-};
-
-CamHelperImx296::CamHelperImx296()
-	: CamHelper(nullptr, frameIntegrationDiff)
-{
-}
-
-uint32_t CamHelperImx296::gainCode(double gain) const
-{
-	uint32_t code = 20 * std::log10(gain) * 10;
-	return std::min(code, maxGainCode);
-}
-
-double CamHelperImx296::gain(uint32_t gainCode) const
-{
-	return std::pow(10.0, gainCode / 200.0);
-}
-
-uint32_t CamHelperImx296::exposureLines(const Duration exposure,
-					[[maybe_unused]] const Duration lineLength) const
-{
-	return std::max<uint32_t>(minExposureLines, (exposure - 14.26us) / timePerLine);
-}
-
-Duration CamHelperImx296::exposure(uint32_t exposureLines,
-				   [[maybe_unused]] const Duration lineLength) const
-{
-	return std::max<uint32_t>(minExposureLines, exposureLines) * timePerLine + 14.26us;
-}
-
-void CamHelperImx296::getDelays(int &exposureDelay, int &gainDelay,
-				int &vblankDelay, int &hblankDelay) const
-{
-	exposureDelay = 2;
-	gainDelay = 2;
-	vblankDelay = 2;
-	hblankDelay = 2;
-}
-
-static CamHelper *create()
-{
-	return new CamHelperImx296();
-}
-
-static RegisterCamHelper reg("imx296", &create);