From 726e9274ea95fa46352556d340c5793a8da51fcd Mon Sep 17 00:00:00 2001 From: Naushir Patuck Date: Wed, 3 May 2023 13:20:27 +0100 Subject: 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 Reviewed-by: Jacopo Mondi Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart --- src/ipa/rpi/cam_helper/cam_helper_imx296.cpp | 83 ++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx296.cpp (limited to 'src/ipa/rpi/cam_helper/cam_helper_imx296.cpp') diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx296.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx296.cpp new file mode 100644 index 00000000..ecb845e7 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_imx296.cpp @@ -0,0 +1,83 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2020, Raspberry Pi Ltd + * + * cam_helper_imx296.cpp - Camera helper for IMX296 sensor + */ + +#include +#include +#include + +#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(minExposureLines, (exposure - 14.26us) / timePerLine); +} + +Duration CamHelperImx296::exposure(uint32_t exposureLines, + [[maybe_unused]] const Duration lineLength) const +{ + return std::max(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); -- cgit v1.2.1