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/README.md | 25 + src/ipa/rpi/cam_helper/cam_helper.cpp | 265 ++++ src/ipa/rpi/cam_helper/cam_helper.h | 132 ++ src/ipa/rpi/cam_helper/cam_helper_imx219.cpp | 115 ++ src/ipa/rpi/cam_helper/cam_helper_imx290.cpp | 68 + src/ipa/rpi/cam_helper/cam_helper_imx296.cpp | 83 ++ src/ipa/rpi/cam_helper/cam_helper_imx477.cpp | 197 +++ src/ipa/rpi/cam_helper/cam_helper_imx519.cpp | 196 +++ src/ipa/rpi/cam_helper/cam_helper_imx708.cpp | 359 +++++ src/ipa/rpi/cam_helper/cam_helper_ov5647.cpp | 109 ++ src/ipa/rpi/cam_helper/cam_helper_ov9281.cpp | 66 + src/ipa/rpi/cam_helper/md_parser.h | 155 +++ src/ipa/rpi/cam_helper/md_parser_smia.cpp | 149 +++ src/ipa/rpi/cam_helper/meson.build | 26 + src/ipa/rpi/controller/af_algorithm.h | 76 ++ src/ipa/rpi/controller/af_status.h | 35 + src/ipa/rpi/controller/agc_algorithm.h | 33 + src/ipa/rpi/controller/agc_status.h | 37 + src/ipa/rpi/controller/algorithm.cpp | 56 + src/ipa/rpi/controller/algorithm.h | 68 + src/ipa/rpi/controller/alsc_status.h | 22 + src/ipa/rpi/controller/awb_algorithm.h | 25 + src/ipa/rpi/controller/awb_status.h | 20 + src/ipa/rpi/controller/black_level_status.h | 15 + src/ipa/rpi/controller/camera_mode.h | 59 + src/ipa/rpi/controller/ccm_algorithm.h | 21 + src/ipa/rpi/controller/ccm_status.h | 14 + src/ipa/rpi/controller/contrast_algorithm.h | 22 + src/ipa/rpi/controller/contrast_status.h | 20 + src/ipa/rpi/controller/controller.cpp | 181 +++ src/ipa/rpi/controller/controller.h | 73 + src/ipa/rpi/controller/denoise_algorithm.h | 23 + src/ipa/rpi/controller/denoise_status.h | 16 + src/ipa/rpi/controller/device_status.cpp | 31 + src/ipa/rpi/controller/device_status.h | 43 + src/ipa/rpi/controller/dpc_status.h | 13 + src/ipa/rpi/controller/geq_status.h | 14 + src/ipa/rpi/controller/histogram.cpp | 64 + src/ipa/rpi/controller/histogram.h | 53 + src/ipa/rpi/controller/lux_status.h | 23 + src/ipa/rpi/controller/meson.build | 29 + src/ipa/rpi/controller/metadata.h | 126 ++ src/ipa/rpi/controller/noise_status.h | 14 + src/ipa/rpi/controller/pdaf_data.h | 24 + src/ipa/rpi/controller/pwl.cpp | 269 ++++ src/ipa/rpi/controller/pwl.h | 127 ++ src/ipa/rpi/controller/region_stats.h | 123 ++ src/ipa/rpi/controller/rpi/af.cpp | 797 +++++++++++ src/ipa/rpi/controller/rpi/af.h | 165 +++ src/ipa/rpi/controller/rpi/agc.cpp | 922 +++++++++++++ src/ipa/rpi/controller/rpi/agc.h | 133 ++ src/ipa/rpi/controller/rpi/alsc.cpp | 865 ++++++++++++ src/ipa/rpi/controller/rpi/alsc.h | 174 +++ src/ipa/rpi/controller/rpi/awb.cpp | 734 ++++++++++ src/ipa/rpi/controller/rpi/awb.h | 191 +++ src/ipa/rpi/controller/rpi/black_level.cpp | 66 + src/ipa/rpi/controller/rpi/black_level.h | 30 + src/ipa/rpi/controller/rpi/ccm.cpp | 199 +++ src/ipa/rpi/controller/rpi/ccm.h | 75 ++ src/ipa/rpi/controller/rpi/contrast.cpp | 181 +++ src/ipa/rpi/controller/rpi/contrast.h | 51 + src/ipa/rpi/controller/rpi/dpc.cpp | 59 + src/ipa/rpi/controller/rpi/dpc.h | 32 + src/ipa/rpi/controller/rpi/focus.h | 28 + src/ipa/rpi/controller/rpi/geq.cpp | 89 ++ src/ipa/rpi/controller/rpi/geq.h | 34 + src/ipa/rpi/controller/rpi/lux.cpp | 115 ++ src/ipa/rpi/controller/rpi/lux.h | 45 + src/ipa/rpi/controller/rpi/noise.cpp | 89 ++ src/ipa/rpi/controller/rpi/noise.h | 32 + src/ipa/rpi/controller/rpi/sdn.cpp | 80 ++ src/ipa/rpi/controller/rpi/sdn.h | 32 + src/ipa/rpi/controller/rpi/sharpen.cpp | 92 ++ src/ipa/rpi/controller/rpi/sharpen.h | 34 + src/ipa/rpi/controller/sharpen_algorithm.h | 21 + src/ipa/rpi/controller/sharpen_status.h | 20 + src/ipa/rpi/controller/statistics.h | 78 ++ src/ipa/rpi/meson.build | 13 + src/ipa/rpi/vc4/data/imx219.json | 486 +++++++ src/ipa/rpi/vc4/data/imx219_noir.json | 402 ++++++ src/ipa/rpi/vc4/data/imx290.json | 200 +++ src/ipa/rpi/vc4/data/imx296.json | 537 ++++++++ src/ipa/rpi/vc4/data/imx296_mono.json | 233 ++++ src/ipa/rpi/vc4/data/imx378.json | 413 ++++++ src/ipa/rpi/vc4/data/imx477.json | 518 +++++++ src/ipa/rpi/vc4/data/imx477_noir.json | 429 ++++++ src/ipa/rpi/vc4/data/imx477_scientific.json | 479 +++++++ src/ipa/rpi/vc4/data/imx477_v1.json | 516 +++++++ src/ipa/rpi/vc4/data/imx519.json | 413 ++++++ src/ipa/rpi/vc4/data/imx708.json | 556 ++++++++ src/ipa/rpi/vc4/data/imx708_noir.json | 556 ++++++++ src/ipa/rpi/vc4/data/imx708_wide.json | 459 +++++++ src/ipa/rpi/vc4/data/imx708_wide_noir.json | 459 +++++++ src/ipa/rpi/vc4/data/meson.build | 26 + src/ipa/rpi/vc4/data/ov5647.json | 487 +++++++ src/ipa/rpi/vc4/data/ov5647_noir.json | 403 ++++++ src/ipa/rpi/vc4/data/ov9281_mono.json | 123 ++ src/ipa/rpi/vc4/data/se327m12.json | 418 ++++++ src/ipa/rpi/vc4/data/uncalibrated.json | 118 ++ src/ipa/rpi/vc4/meson.build | 47 + src/ipa/rpi/vc4/raspberrypi.cpp | 1853 ++++++++++++++++++++++++++ 101 files changed, 19321 insertions(+) create mode 100644 src/ipa/rpi/README.md create mode 100644 src/ipa/rpi/cam_helper/cam_helper.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper.h create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx219.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx290.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx296.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx477.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx519.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_imx708.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_ov5647.cpp create mode 100644 src/ipa/rpi/cam_helper/cam_helper_ov9281.cpp create mode 100644 src/ipa/rpi/cam_helper/md_parser.h create mode 100644 src/ipa/rpi/cam_helper/md_parser_smia.cpp create mode 100644 src/ipa/rpi/cam_helper/meson.build create mode 100644 src/ipa/rpi/controller/af_algorithm.h create mode 100644 src/ipa/rpi/controller/af_status.h create mode 100644 src/ipa/rpi/controller/agc_algorithm.h create mode 100644 src/ipa/rpi/controller/agc_status.h create mode 100644 src/ipa/rpi/controller/algorithm.cpp create mode 100644 src/ipa/rpi/controller/algorithm.h create mode 100644 src/ipa/rpi/controller/alsc_status.h create mode 100644 src/ipa/rpi/controller/awb_algorithm.h create mode 100644 src/ipa/rpi/controller/awb_status.h create mode 100644 src/ipa/rpi/controller/black_level_status.h create mode 100644 src/ipa/rpi/controller/camera_mode.h create mode 100644 src/ipa/rpi/controller/ccm_algorithm.h create mode 100644 src/ipa/rpi/controller/ccm_status.h create mode 100644 src/ipa/rpi/controller/contrast_algorithm.h create mode 100644 src/ipa/rpi/controller/contrast_status.h create mode 100644 src/ipa/rpi/controller/controller.cpp create mode 100644 src/ipa/rpi/controller/controller.h create mode 100644 src/ipa/rpi/controller/denoise_algorithm.h create mode 100644 src/ipa/rpi/controller/denoise_status.h create mode 100644 src/ipa/rpi/controller/device_status.cpp create mode 100644 src/ipa/rpi/controller/device_status.h create mode 100644 src/ipa/rpi/controller/dpc_status.h create mode 100644 src/ipa/rpi/controller/geq_status.h create mode 100644 src/ipa/rpi/controller/histogram.cpp create mode 100644 src/ipa/rpi/controller/histogram.h create mode 100644 src/ipa/rpi/controller/lux_status.h create mode 100644 src/ipa/rpi/controller/meson.build create mode 100644 src/ipa/rpi/controller/metadata.h create mode 100644 src/ipa/rpi/controller/noise_status.h create mode 100644 src/ipa/rpi/controller/pdaf_data.h create mode 100644 src/ipa/rpi/controller/pwl.cpp create mode 100644 src/ipa/rpi/controller/pwl.h create mode 100644 src/ipa/rpi/controller/region_stats.h create mode 100644 src/ipa/rpi/controller/rpi/af.cpp create mode 100644 src/ipa/rpi/controller/rpi/af.h create mode 100644 src/ipa/rpi/controller/rpi/agc.cpp create mode 100644 src/ipa/rpi/controller/rpi/agc.h create mode 100644 src/ipa/rpi/controller/rpi/alsc.cpp create mode 100644 src/ipa/rpi/controller/rpi/alsc.h create mode 100644 src/ipa/rpi/controller/rpi/awb.cpp create mode 100644 src/ipa/rpi/controller/rpi/awb.h create mode 100644 src/ipa/rpi/controller/rpi/black_level.cpp create mode 100644 src/ipa/rpi/controller/rpi/black_level.h create mode 100644 src/ipa/rpi/controller/rpi/ccm.cpp create mode 100644 src/ipa/rpi/controller/rpi/ccm.h create mode 100644 src/ipa/rpi/controller/rpi/contrast.cpp create mode 100644 src/ipa/rpi/controller/rpi/contrast.h create mode 100644 src/ipa/rpi/controller/rpi/dpc.cpp create mode 100644 src/ipa/rpi/controller/rpi/dpc.h create mode 100644 src/ipa/rpi/controller/rpi/focus.h create mode 100644 src/ipa/rpi/controller/rpi/geq.cpp create mode 100644 src/ipa/rpi/controller/rpi/geq.h create mode 100644 src/ipa/rpi/controller/rpi/lux.cpp create mode 100644 src/ipa/rpi/controller/rpi/lux.h create mode 100644 src/ipa/rpi/controller/rpi/noise.cpp create mode 100644 src/ipa/rpi/controller/rpi/noise.h create mode 100644 src/ipa/rpi/controller/rpi/sdn.cpp create mode 100644 src/ipa/rpi/controller/rpi/sdn.h create mode 100644 src/ipa/rpi/controller/rpi/sharpen.cpp create mode 100644 src/ipa/rpi/controller/rpi/sharpen.h create mode 100644 src/ipa/rpi/controller/sharpen_algorithm.h create mode 100644 src/ipa/rpi/controller/sharpen_status.h create mode 100644 src/ipa/rpi/controller/statistics.h create mode 100644 src/ipa/rpi/meson.build create mode 100644 src/ipa/rpi/vc4/data/imx219.json create mode 100644 src/ipa/rpi/vc4/data/imx219_noir.json create mode 100644 src/ipa/rpi/vc4/data/imx290.json create mode 100644 src/ipa/rpi/vc4/data/imx296.json create mode 100644 src/ipa/rpi/vc4/data/imx296_mono.json create mode 100644 src/ipa/rpi/vc4/data/imx378.json create mode 100644 src/ipa/rpi/vc4/data/imx477.json create mode 100644 src/ipa/rpi/vc4/data/imx477_noir.json create mode 100644 src/ipa/rpi/vc4/data/imx477_scientific.json create mode 100644 src/ipa/rpi/vc4/data/imx477_v1.json create mode 100644 src/ipa/rpi/vc4/data/imx519.json create mode 100644 src/ipa/rpi/vc4/data/imx708.json create mode 100644 src/ipa/rpi/vc4/data/imx708_noir.json create mode 100644 src/ipa/rpi/vc4/data/imx708_wide.json create mode 100644 src/ipa/rpi/vc4/data/imx708_wide_noir.json create mode 100644 src/ipa/rpi/vc4/data/meson.build create mode 100644 src/ipa/rpi/vc4/data/ov5647.json create mode 100644 src/ipa/rpi/vc4/data/ov5647_noir.json create mode 100644 src/ipa/rpi/vc4/data/ov9281_mono.json create mode 100644 src/ipa/rpi/vc4/data/se327m12.json create mode 100644 src/ipa/rpi/vc4/data/uncalibrated.json create mode 100644 src/ipa/rpi/vc4/meson.build create mode 100644 src/ipa/rpi/vc4/raspberrypi.cpp (limited to 'src/ipa/rpi') diff --git a/src/ipa/rpi/README.md b/src/ipa/rpi/README.md new file mode 100644 index 00000000..94a8ccc8 --- /dev/null +++ b/src/ipa/rpi/README.md @@ -0,0 +1,25 @@ +.. SPDX-License-Identifier: BSD-2-Clause + +# _libcamera_ for the Raspberry Pi + +Raspberry Pi provides a fully featured pipeline handler and control algorithms +(IPAs, or "Image Processing Algorithms") to work with _libcamera_. Support is +included for all existing Raspberry Pi camera modules. + +_libcamera_ for the Raspberry Pi allows users to: + +1. Use their existing Raspberry Pi cameras. +1. Change the tuning of the image processing for their Raspberry Pi cameras. +1. Alter or amend the control algorithms (such as AGC/AEC, AWB or any others) + that control the sensor and ISP. +1. Implement their own custom control algorithms. +1. Supply new tunings and/or algorithms for completely new sensors. + +## How to install and run _libcamera_ on the Raspberry Pi + +Please follow the instructions [here](https://www.raspberrypi.com/documentation/accessories/camera.html). + +## Documentation + +Full documentation for the _Raspberry Pi Camera Algorithm and Tuning Guide_ can +be found [here](https://datasheets.raspberrypi.com/camera/raspberry-pi-camera-guide.pdf). diff --git a/src/ipa/rpi/cam_helper/cam_helper.cpp b/src/ipa/rpi/cam_helper/cam_helper.cpp new file mode 100644 index 00000000..ddd5e9a4 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper.cpp @@ -0,0 +1,265 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * cam_helper.cpp - helper information for different sensors + */ + +#include + +#include +#include +#include + +#include "libcamera/internal/v4l2_videodevice.h" + +#include "cam_helper.h" +#include "md_parser.h" + +using namespace RPiController; +using namespace libcamera; +using libcamera::utils::Duration; +using namespace std::literals::chrono_literals; + +namespace libcamera { +LOG_DECLARE_CATEGORY(IPARPI) +} + +namespace { + +std::map &camHelpers() +{ + static std::map helpers; + return helpers; +} + +} /* namespace */ + +CamHelper *CamHelper::create(std::string const &camName) +{ + /* + * CamHelpers get registered by static RegisterCamHelper + * initialisers. + */ + for (auto &p : camHelpers()) { + if (camName.find(p.first) != std::string::npos) + return p.second(); + } + + return nullptr; +} + +CamHelper::CamHelper(std::unique_ptr parser, unsigned int frameIntegrationDiff) + : parser_(std::move(parser)), frameIntegrationDiff_(frameIntegrationDiff) +{ +} + +CamHelper::~CamHelper() +{ +} + +void CamHelper::prepare(Span buffer, + Metadata &metadata) +{ + parseEmbeddedData(buffer, metadata); +} + +void CamHelper::process([[maybe_unused]] StatisticsPtr &stats, + [[maybe_unused]] Metadata &metadata) +{ +} + +uint32_t CamHelper::exposureLines(const Duration exposure, const Duration lineLength) const +{ + return exposure / lineLength; +} + +Duration CamHelper::exposure(uint32_t exposureLines, const Duration lineLength) const +{ + return exposureLines * lineLength; +} + +std::pair CamHelper::getBlanking(Duration &exposure, + Duration minFrameDuration, + Duration maxFrameDuration) const +{ + uint32_t frameLengthMin, frameLengthMax, vblank, hblank; + Duration lineLength = mode_.minLineLength; + + /* + * minFrameDuration and maxFrameDuration are clamped by the caller + * based on the limits for the active sensor mode. + * + * frameLengthMax gets calculated on the smallest line length as we do + * not want to extend that unless absolutely necessary. + */ + frameLengthMin = minFrameDuration / mode_.minLineLength; + frameLengthMax = maxFrameDuration / mode_.minLineLength; + + /* + * Watch out for (exposureLines + frameIntegrationDiff_) overflowing a + * uint32_t in the std::clamp() below when the exposure time is + * extremely (extremely!) long - as happens when the IPA calculates the + * maximum possible exposure time. + */ + uint32_t exposureLines = std::min(CamHelper::exposureLines(exposure, lineLength), + std::numeric_limits::max() - frameIntegrationDiff_); + uint32_t frameLengthLines = std::clamp(exposureLines + frameIntegrationDiff_, + frameLengthMin, frameLengthMax); + + /* + * If our frame length lines is above the maximum allowed, see if we can + * extend the line length to accommodate the requested frame length. + */ + if (frameLengthLines > mode_.maxFrameLength) { + Duration lineLengthAdjusted = lineLength * frameLengthLines / mode_.maxFrameLength; + lineLength = std::min(mode_.maxLineLength, lineLengthAdjusted); + frameLengthLines = mode_.maxFrameLength; + } + + hblank = lineLengthToHblank(lineLength); + vblank = frameLengthLines - mode_.height; + + /* + * Limit the exposure to the maximum frame duration requested, and + * re-calculate if it has been clipped. + */ + exposureLines = std::min(frameLengthLines - frameIntegrationDiff_, + CamHelper::exposureLines(exposure, lineLength)); + exposure = CamHelper::exposure(exposureLines, lineLength); + + return { vblank, hblank }; +} + +Duration CamHelper::hblankToLineLength(uint32_t hblank) const +{ + return (mode_.width + hblank) * (1.0s / mode_.pixelRate); +} + +uint32_t CamHelper::lineLengthToHblank(const Duration &lineLength) const +{ + return (lineLength * mode_.pixelRate / 1.0s) - mode_.width; +} + +Duration CamHelper::lineLengthPckToDuration(uint32_t lineLengthPck) const +{ + return lineLengthPck * (1.0s / mode_.pixelRate); +} + +void CamHelper::setCameraMode(const CameraMode &mode) +{ + mode_ = mode; + if (parser_) { + parser_->reset(); + parser_->setBitsPerPixel(mode.bitdepth); + parser_->setLineLengthBytes(0); /* We use SetBufferSize. */ + } +} + +void CamHelper::getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const +{ + /* + * These values are correct for many sensors. Other sensors will + * need to over-ride this function. + */ + exposureDelay = 2; + gainDelay = 1; + vblankDelay = 2; + hblankDelay = 2; +} + +bool CamHelper::sensorEmbeddedDataPresent() const +{ + return false; +} + +double CamHelper::getModeSensitivity([[maybe_unused]] const CameraMode &mode) const +{ + /* + * Most sensors have the same sensitivity in every mode, but this + * function can be overridden for those that do not. Note that it is + * called before mode_ is set, so it must return the sensitivity + * of the mode that is passed in. + */ + return 1.0; +} + +unsigned int CamHelper::hideFramesStartup() const +{ + /* + * The number of frames when a camera first starts that shouldn't be + * displayed as they are invalid in some way. + */ + return 0; +} + +unsigned int CamHelper::hideFramesModeSwitch() const +{ + /* After a mode switch, many sensors return valid frames immediately. */ + return 0; +} + +unsigned int CamHelper::mistrustFramesStartup() const +{ + /* Many sensors return a single bad frame on start-up. */ + return 1; +} + +unsigned int CamHelper::mistrustFramesModeSwitch() const +{ + /* Many sensors return valid metadata immediately. */ + return 0; +} + +void CamHelper::parseEmbeddedData(Span buffer, + Metadata &metadata) +{ + MdParser::RegisterMap registers; + Metadata parsedMetadata; + + if (buffer.empty()) + return; + + if (parser_->parse(buffer, registers) != MdParser::Status::OK) { + LOG(IPARPI, Error) << "Embedded data buffer parsing failed"; + return; + } + + populateMetadata(registers, parsedMetadata); + metadata.merge(parsedMetadata); + + /* + * Overwrite the exposure/gain, line/frame length and sensor temperature values + * in the existing DeviceStatus with values from the parsed embedded buffer. + * Fetch it first in case any other fields were set meaningfully. + */ + DeviceStatus deviceStatus, parsedDeviceStatus; + if (metadata.get("device.status", deviceStatus) || + parsedMetadata.get("device.status", parsedDeviceStatus)) { + LOG(IPARPI, Error) << "DeviceStatus not found"; + return; + } + + deviceStatus.shutterSpeed = parsedDeviceStatus.shutterSpeed; + deviceStatus.analogueGain = parsedDeviceStatus.analogueGain; + deviceStatus.frameLength = parsedDeviceStatus.frameLength; + deviceStatus.lineLength = parsedDeviceStatus.lineLength; + if (parsedDeviceStatus.sensorTemperature) + deviceStatus.sensorTemperature = parsedDeviceStatus.sensorTemperature; + + LOG(IPARPI, Debug) << "Metadata updated - " << deviceStatus; + + metadata.set("device.status", deviceStatus); +} + +void CamHelper::populateMetadata([[maybe_unused]] const MdParser::RegisterMap ®isters, + [[maybe_unused]] Metadata &metadata) const +{ +} + +RegisterCamHelper::RegisterCamHelper(char const *camName, + CamHelperCreateFunc createFunc) +{ + camHelpers()[std::string(camName)] = createFunc; +} diff --git a/src/ipa/rpi/cam_helper/cam_helper.h b/src/ipa/rpi/cam_helper/cam_helper.h new file mode 100644 index 00000000..58a4b202 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper.h @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * cam_helper.h - helper class providing camera information + */ +#pragma once + +#include +#include +#include + +#include +#include + +#include "controller/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 parser, unsigned int frameIntegrationDiff); + virtual ~CamHelper(); + void setCameraMode(const CameraMode &mode); + virtual void prepare(libcamera::Span 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 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 buffer, + Metadata &metadata); + virtual void populateMetadata(const MdParser::RegisterMap ®isters, + Metadata &metadata) const; + + std::unique_ptr 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 */ diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx219.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx219.cpp new file mode 100644 index 00000000..c3337ed0 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_imx219.cpp @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * cam_helper_imx219.cpp - camera helper for imx219 sensor + */ + +#include +#include +#include +#include + +/* + * We have observed that the imx219 embedded data stream randomly returns junk + * register values. Do not rely on embedded data until this has been resolved. + */ +#define ENABLE_EMBEDDED_DATA 0 + +#include "cam_helper.h" +#if ENABLE_EMBEDDED_DATA +#include "md_parser.h" +#endif + +using namespace RPiController; + +/* + * We care about one gain register and a pair of exposure registers. Their I2C + * addresses from the Sony IMX219 datasheet: + */ +constexpr uint32_t gainReg = 0x157; +constexpr uint32_t expHiReg = 0x15a; +constexpr uint32_t expLoReg = 0x15b; +constexpr uint32_t frameLengthHiReg = 0x160; +constexpr uint32_t frameLengthLoReg = 0x161; +constexpr uint32_t lineLengthHiReg = 0x162; +constexpr uint32_t lineLengthLoReg = 0x163; +constexpr std::initializer_list registerList [[maybe_unused]] + = { expHiReg, expLoReg, gainReg, frameLengthHiReg, frameLengthLoReg, + lineLengthHiReg, lineLengthLoReg }; + +class CamHelperImx219 : public CamHelper +{ +public: + CamHelperImx219(); + uint32_t gainCode(double gain) const override; + double gain(uint32_t gainCode) const override; + unsigned int mistrustFramesModeSwitch() const override; + bool sensorEmbeddedDataPresent() const override; + +private: + /* + * Smallest difference between the frame length and integration time, + * in units of lines. + */ + static constexpr int frameIntegrationDiff = 4; + + void populateMetadata(const MdParser::RegisterMap ®isters, + Metadata &metadata) const override; +}; + +CamHelperImx219::CamHelperImx219() +#if ENABLE_EMBEDDED_DATA + : CamHelper(std::make_unique(registerList), frameIntegrationDiff) +#else + : CamHelper({}, frameIntegrationDiff) +#endif +{ +} + +uint32_t CamHelperImx219::gainCode(double gain) const +{ + return (uint32_t)(256 - 256 / gain); +} + +double CamHelperImx219::gain(uint32_t gainCode) const +{ + return 256.0 / (256 - gainCode); +} + +unsigned int CamHelperImx219::mistrustFramesModeSwitch() const +{ + /* + * For reasons unknown, we do occasionally get a bogus metadata frame + * at a mode switch (though not at start-up). Possibly warrants some + * investigation, though not a big deal. + */ + return 1; +} + +bool CamHelperImx219::sensorEmbeddedDataPresent() const +{ + return ENABLE_EMBEDDED_DATA; +} + +void CamHelperImx219::populateMetadata(const MdParser::RegisterMap ®isters, + 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(gainReg)); + deviceStatus.frameLength = registers.at(frameLengthHiReg) * 256 + registers.at(frameLengthLoReg); + + metadata.set("device.status", deviceStatus); +} + +static CamHelper *create() +{ + return new CamHelperImx219(); +} + +static RegisterCamHelper reg("imx219", &create); diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp new file mode 100644 index 00000000..7d6f5b54 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_imx290.cpp @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2021, Raspberry Pi Ltd + * + * cam_helper_imx290.cpp - camera helper for imx290 sensor + */ + +#include + +#include "cam_helper.h" + +using namespace RPiController; + +class CamHelperImx290 : public CamHelper +{ +public: + CamHelperImx290(); + uint32_t gainCode(double gain) const override; + double gain(uint32_t gainCode) const override; + void getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const override; + unsigned int hideFramesModeSwitch() const override; + +private: + /* + * Smallest difference between the frame length and integration time, + * in units of lines. + */ + static constexpr int frameIntegrationDiff = 2; +}; + +CamHelperImx290::CamHelperImx290() + : CamHelper({}, frameIntegrationDiff) +{ +} + +uint32_t CamHelperImx290::gainCode(double gain) const +{ + int code = 66.6667 * log10(gain); + return std::max(0, std::min(code, 0xf0)); +} + +double CamHelperImx290::gain(uint32_t gainCode) const +{ + return pow(10, 0.015 * gainCode); +} + +void CamHelperImx290::getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const +{ + exposureDelay = 2; + gainDelay = 2; + vblankDelay = 2; + hblankDelay = 2; +} + +unsigned int CamHelperImx290::hideFramesModeSwitch() const +{ + /* After a mode switch, we seem to get 1 bad frame. */ + return 1; +} + +static CamHelper *create() +{ + return new CamHelperImx290(); +} + +static RegisterCamHelper reg("imx290", &create); 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); diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp new file mode 100644 index 00000000..bc769ca7 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_imx477.cpp @@ -0,0 +1,197 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2020, Raspberry Pi Ltd + * + * cam_helper_imx477.cpp - camera helper for imx477 sensor + */ + +#include +#include +#include +#include +#include +#include + +#include + +#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 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 buffer, Metadata &metadata) override; + std::pair 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 ®isters, + Metadata &metadata) const override; +}; + +CamHelperImx477::CamHelperImx477() + : CamHelper(std::make_unique(registerList), frameIntegrationDiff) +{ +} + +uint32_t CamHelperImx477::gainCode(double gain) const +{ + return static_cast(1024 - 1024 / gain); +} + +double CamHelperImx477::gain(uint32_t gainCode) const +{ + return 1024.0 / (1024 - gainCode); +} + +void CamHelperImx477::prepare(libcamera::Span 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 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 ®isters, + 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(registers.at(temperatureReg), -20, 80); + + metadata.set("device.status", deviceStatus); +} + +static CamHelper *create() +{ + return new CamHelperImx477(); +} + +static RegisterCamHelper reg("imx477", &create); diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx519.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx519.cpp new file mode 100644 index 00000000..c7262aa0 --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_imx519.cpp @@ -0,0 +1,196 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Based on cam_helper_imx477.cpp + * Copyright (C) 2020, Raspberry Pi Ltd + * + * cam_helper_imx519.cpp - camera helper for imx519 sensor + * Copyright (C) 2021, Arducam Technology co., Ltd. + */ + +#include +#include +#include +#include +#include + +#include + +#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 IMX519 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 std::initializer_list registerList = + { expHiReg, expLoReg, gainHiReg, gainLoReg, frameLengthHiReg, frameLengthLoReg, + lineLengthHiReg, lineLengthLoReg }; + +class CamHelperImx519 : public CamHelper +{ +public: + CamHelperImx519(); + uint32_t gainCode(double gain) const override; + double gain(uint32_t gainCode) const override; + void prepare(libcamera::Span buffer, Metadata &metadata) override; + std::pair 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 = 32; + /* 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 ®isters, + Metadata &metadata) const override; +}; + +CamHelperImx519::CamHelperImx519() + : CamHelper(std::make_unique(registerList), frameIntegrationDiff) +{ +} + +uint32_t CamHelperImx519::gainCode(double gain) const +{ + return static_cast(1024 - 1024 / gain); +} + +double CamHelperImx519::gain(uint32_t gainCode) const +{ + return 1024.0 / (1024 - gainCode); +} + +void CamHelperImx519::prepare(libcamera::Span 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 CamHelperImx519::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 = CamHelperImx519::exposureLines(exposure, lineLength); + exposureLines = std::min(exposureLines, frameLength - frameIntegrationDiff); + exposure = CamHelperImx519::exposure(exposureLines, lineLength); + } + + return { frameLength - mode_.height, hblank }; +} + +void CamHelperImx519::getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const +{ + exposureDelay = 2; + gainDelay = 2; + vblankDelay = 3; + hblankDelay = 3; +} + +bool CamHelperImx519::sensorEmbeddedDataPresent() const +{ + return true; +} + +void CamHelperImx519::populateMetadata(const MdParser::RegisterMap ®isters, + 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); + + metadata.set("device.status", deviceStatus); +} + +static CamHelper *create() +{ + return new CamHelperImx519(); +} + +static RegisterCamHelper reg("imx519", &create); diff --git a/src/ipa/rpi/cam_helper/cam_helper_imx708.cpp b/src/ipa/rpi/cam_helper/cam_helper_imx708.cpp new file mode 100644 index 00000000..641ba18f --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_imx708.cpp @@ -0,0 +1,359 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022, Raspberry Pi Ltd + * + * cam_helper_imx708.cpp - camera helper for imx708 sensor + */ + +#include +#include +#include +#include + +#include + +#include "controller/pdaf_data.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 imx708 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 registerList = + { expHiReg, expLoReg, gainHiReg, gainLoReg, lineLengthHiReg, + lineLengthLoReg, frameLengthHiReg, frameLengthLoReg, temperatureReg }; + +class CamHelperImx708 : public CamHelper +{ +public: + CamHelperImx708(); + uint32_t gainCode(double gain) const override; + double gain(uint32_t gain_code) const override; + void prepare(libcamera::Span buffer, Metadata &metadata) override; + void process(StatisticsPtr &stats, Metadata &metadata) override; + std::pair 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; + double getModeSensitivity(const CameraMode &mode) const override; + unsigned int hideFramesModeSwitch() const override { return 1; } // seems to be required for HDR + +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; + + static constexpr int pdafStatsRows = 12; + static constexpr int pdafStatsCols = 16; + + void populateMetadata(const MdParser::RegisterMap ®isters, + Metadata &metadata) const override; + + static bool parsePdafData(const uint8_t *ptr, size_t len, unsigned bpp, + PdafRegions &pdaf); + + bool parseAEHist(const uint8_t *ptr, size_t len, unsigned bpp); + void putAGCStatistics(StatisticsPtr stats); + + Histogram aeHistLinear_; + uint32_t aeHistAverage_; + bool aeHistValid_; +}; + +CamHelperImx708::CamHelperImx708() + : CamHelper(std::make_unique(registerList), frameIntegrationDiff), + aeHistLinear_{}, aeHistAverage_(0), aeHistValid_(false) +{ +} + +uint32_t CamHelperImx708::gainCode(double gain) const +{ + return static_cast(1024 - 1024 / gain); +} + +double CamHelperImx708::gain(uint32_t gain_code) const +{ + return 1024.0 / (1024 - gain_code); +} + +void CamHelperImx708::prepare(libcamera::Span buffer, Metadata &metadata) +{ + MdParser::RegisterMap registers; + DeviceStatus deviceStatus; + + LOG(IPARPI, Debug) << "Embedded buffer size: " << buffer.size(); + + if (metadata.get("device.status", deviceStatus)) { + LOG(IPARPI, Error) << "DeviceStatus not found from DelayedControls"; + return; + } + + parseEmbeddedData(buffer, metadata); + + /* + * Parse PDAF data, which we expect to occupy the third scanline + * of embedded data. As PDAF is quite sensor-specific, it's parsed here. + */ + size_t bytesPerLine = (mode_.width * mode_.bitdepth) >> 3; + + if (buffer.size() > 2 * bytesPerLine) { + PdafRegions pdaf; + if (parsePdafData(&buffer[2 * bytesPerLine], + buffer.size() - 2 * bytesPerLine, + mode_.bitdepth, pdaf)) + metadata.set("pdaf.regions", pdaf); + } + + /* Parse AE-HIST data where present */ + if (buffer.size() > 3 * bytesPerLine) { + aeHistValid_ = parseAEHist(&buffer[3 * bytesPerLine], + buffer.size() - 3 * bytesPerLine, + mode_.bitdepth); + } + + /* + * 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; + } +} + +void CamHelperImx708::process(StatisticsPtr &stats, [[maybe_unused]] Metadata &metadata) +{ + if (aeHistValid_) + putAGCStatistics(stats); +} + +std::pair CamHelperImx708::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 = CamHelper::exposureLines(exposure, lineLength); + exposureLines = std::min(exposureLines, frameLength - frameIntegrationDiff); + exposure = CamHelper::exposure(exposureLines, lineLength); + } + + return { frameLength - mode_.height, hblank }; +} + +void CamHelperImx708::getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const +{ + exposureDelay = 2; + gainDelay = 2; + vblankDelay = 3; + hblankDelay = 3; +} + +bool CamHelperImx708::sensorEmbeddedDataPresent() const +{ + return true; +} + +double CamHelperImx708::getModeSensitivity(const CameraMode &mode) const +{ + /* In binned modes, sensitivity increases by a factor of 2 */ + return (mode.width > 2304) ? 1.0 : 2.0; +} + +void CamHelperImx708::populateMetadata(const MdParser::RegisterMap ®isters, + 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(registers.at(temperatureReg), -20, 80); + + metadata.set("device.status", deviceStatus); +} + +bool CamHelperImx708::parsePdafData(const uint8_t *ptr, size_t len, + unsigned bpp, PdafRegions &pdaf) +{ + size_t step = bpp >> 1; /* bytes per PDAF grid entry */ + + if (bpp < 10 || bpp > 12 || len < 194 * step || ptr[0] != 0 || ptr[1] >= 0x40) { + LOG(IPARPI, Error) << "PDAF data in unsupported format"; + return false; + } + + pdaf.init({ pdafStatsCols, pdafStatsRows }); + + ptr += 2 * step; + for (unsigned i = 0; i < pdafStatsRows; ++i) { + for (unsigned j = 0; j < pdafStatsCols; ++j) { + unsigned c = (ptr[0] << 3) | (ptr[1] >> 5); + int p = (((ptr[1] & 0x0F) - (ptr[1] & 0x10)) << 6) | (ptr[2] >> 2); + PdafData pdafData; + pdafData.conf = c; + pdafData.phase = c ? p : 0; + pdaf.set(libcamera::Point(j, i), { pdafData, 1, 0 }); + ptr += step; + } + } + + return true; +} + +bool CamHelperImx708::parseAEHist(const uint8_t *ptr, size_t len, unsigned bpp) +{ + static constexpr unsigned int PipelineBits = Statistics::NormalisationFactorPow2; + + uint64_t count = 0, sum = 0; + size_t step = bpp >> 1; /* bytes per histogram bin */ + uint32_t hist[128]; + + if (len < 144 * step) + return false; + + /* + * Read the 128 bin linear histogram, which by default covers + * the full range of the HDR shortest exposure (small values are + * expected to dominate, so pixel-value resolution will be poor). + */ + for (unsigned i = 0; i < 128; ++i) { + if (ptr[3] != 0x55) + return false; + uint32_t c = (ptr[0] << 14) + (ptr[1] << 6) + (ptr[2] >> 2); + hist[i] = c >> 2; /* pixels to quads */ + if (i != 0) { + count += c; + sum += c * + (i * (1u << (PipelineBits - 7)) + + (1u << (PipelineBits - 8))); + } + ptr += step; + } + + /* + * Now use the first 9 bins of the log histogram (these should be + * subdivisions of the smallest linear bin), to get a more accurate + * average value. Don't assume that AEHIST1_AVERAGE is present. + */ + for (unsigned i = 0; i < 9; ++i) { + if (ptr[3] != 0x55) + return false; + uint32_t c = (ptr[0] << 14) + (ptr[1] << 6) + (ptr[2] >> 2); + count += c; + sum += c * + ((3u << PipelineBits) >> (17 - i)); + ptr += step; + } + if ((unsigned)((ptr[0] << 12) + (ptr[1] << 4) + (ptr[2] >> 4)) != + hist[1]) { + LOG(IPARPI, Error) << "Lin/Log histogram mismatch"; + return false; + } + + aeHistLinear_ = Histogram(hist, 128); + aeHistAverage_ = count ? (sum / count) : 0; + + return count != 0; +} + +void CamHelperImx708::putAGCStatistics(StatisticsPtr stats) +{ + /* + * For HDR mode, copy sensor's AE/AGC statistics over ISP's, so the + * AGC algorithm sees a linear response to exposure and gain changes. + * + * Histogram: Just copy the "raw" histogram over the tone-mapped one, + * although they have different distributions (raw values are lower). + * Tuning should either ignore it, or constrain for highlights only. + * + * Average: Overwrite all regional averages with a global raw average, + * scaled by a fiddle-factor so that a conventional (non-HDR) y_target + * of e.g. 0.17 will map to a suitable level for HDR. + */ + stats->yHist = aeHistLinear_; + + constexpr unsigned int HdrHeadroomFactor = 4; + uint64_t v = HdrHeadroomFactor * aeHistAverage_; + for (auto ®ion : stats->agcRegions) { + region.val.rSum = region.val.gSum = region.val.bSum = region.counted * v; + } +} + +static CamHelper *create() +{ + return new CamHelperImx708(); +} + +static RegisterCamHelper reg("imx708", &create); +static RegisterCamHelper regWide("imx708_wide", &create); +static RegisterCamHelper regNoIr("imx708_noir", &create); +static RegisterCamHelper regWideNoIr("imx708_wide_noir", &create); diff --git a/src/ipa/rpi/cam_helper/cam_helper_ov5647.cpp b/src/ipa/rpi/cam_helper/cam_helper_ov5647.cpp new file mode 100644 index 00000000..5a99083d --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_ov5647.cpp @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * cam_helper_ov5647.cpp - camera information for ov5647 sensor + */ + +#include + +#include "cam_helper.h" + +using namespace RPiController; + +class CamHelperOv5647 : public CamHelper +{ +public: + CamHelperOv5647(); + uint32_t gainCode(double gain) const override; + double gain(uint32_t gainCode) const override; + void getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const override; + unsigned int hideFramesStartup() const override; + unsigned int hideFramesModeSwitch() const override; + unsigned int mistrustFramesStartup() const override; + unsigned int mistrustFramesModeSwitch() const override; + +private: + /* + * Smallest difference between the frame length and integration time, + * in units of lines. + */ + static constexpr int frameIntegrationDiff = 4; +}; + +/* + * OV5647 doesn't output metadata, so we have to use the "unicam parser" which + * works by counting frames. + */ + +CamHelperOv5647::CamHelperOv5647() + : CamHelper({}, frameIntegrationDiff) +{ +} + +uint32_t CamHelperOv5647::gainCode(double gain) const +{ + return static_cast(gain * 16.0); +} + +double CamHelperOv5647::gain(uint32_t gainCode) const +{ + return static_cast(gainCode) / 16.0; +} + +void CamHelperOv5647::getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const +{ + /* + * We run this sensor in a mode where the gain delay is bumped up to + * 2. It seems to be the only way to make the delays "predictable". + */ + exposureDelay = 2; + gainDelay = 2; + vblankDelay = 2; + hblankDelay = 2; +} + +unsigned int CamHelperOv5647::hideFramesStartup() const +{ + /* + * On startup, we get a couple of under-exposed frames which + * we don't want shown. + */ + return 2; +} + +unsigned int CamHelperOv5647::hideFramesModeSwitch() const +{ + /* + * After a mode switch, we get a couple of under-exposed frames which + * we don't want shown. + */ + return 2; +} + +unsigned int CamHelperOv5647::mistrustFramesStartup() const +{ + /* + * First couple of frames are under-exposed and are no good for control + * algos. + */ + return 2; +} + +unsigned int CamHelperOv5647::mistrustFramesModeSwitch() const +{ + /* + * First couple of frames are under-exposed even after a simple + * mode switch, and are no good for control algos. + */ + return 2; +} + +static CamHelper *create() +{ + return new CamHelperOv5647(); +} + +static RegisterCamHelper reg("ov5647", &create); diff --git a/src/ipa/rpi/cam_helper/cam_helper_ov9281.cpp b/src/ipa/rpi/cam_helper/cam_helper_ov9281.cpp new file mode 100644 index 00000000..86c5bc4c --- /dev/null +++ b/src/ipa/rpi/cam_helper/cam_helper_ov9281.cpp @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2021, Raspberry Pi Ltd + * + * cam_helper_ov9281.cpp - camera information for ov9281 sensor + */ + +#include + +#include "cam_helper.h" + +using namespace RPiController; + +class CamHelperOv9281 : public CamHelper +{ +public: + CamHelperOv9281(); + uint32_t gainCode(double gain) const override; + double gain(uint32_t gainCode) const override; + void getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const override; + +private: + /* + * Smallest difference between the frame length and integration time, + * in units of lines. + */ + static constexpr int frameIntegrationDiff = 4; +}; + +/* + * OV9281 doesn't output metadata, so we have to use the "unicam parser" which + * works by counting frames. + */ + +CamHelperOv9281::CamHelperOv9281() + : CamHelper({}, frameIntegrationDiff) +{ +} + +uint32_t CamHelperOv9281::gainCode(double gain) const +{ + return static_cast(gain * 16.0); +} + +double CamHelperOv9281::gain(uint32_t gainCode) const +{ + return static_cast(gainCode) / 16.0; +} + +void CamHelperOv9281::getDelays(int &exposureDelay, int &gainDelay, + int &vblankDelay, int &hblankDelay) const +{ + /* The driver appears to behave as follows: */ + exposureDelay = 2; + gainDelay = 2; + vblankDelay = 2; + hblankDelay = 2; +} + +static CamHelper *create() +{ + return new CamHelperOv9281(); +} + +static RegisterCamHelper reg("ov9281", &create); diff --git a/src/ipa/rpi/cam_helper/md_parser.h b/src/ipa/rpi/cam_helper/md_parser.h new file mode 100644 index 00000000..77d557aa --- /dev/null +++ b/src/ipa/rpi/cam_helper/md_parser.h @@ -0,0 +1,155 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * md_parser.h - image sensor metadata parser interface + */ +#pragma once + +#include +#include +#include +#include + +#include + +/* + * Camera metadata parser class. Usage as shown below. + * + * Setup: + * + * Usually the metadata parser will be made as part of the CamHelper class so + * application code doesn't have to worry which kind to instantiate. But for + * the sake of example let's suppose we're parsing imx219 metadata. + * + * MdParser *parser = new MdParserSmia({ expHiReg, expLoReg, gainReg }); + * parser->SetBitsPerPixel(bpp); + * parser->SetLineLengthBytes(pitch); + * parser->SetNumLines(2); + * + * Note 1: if you don't know how many lines there are, the size of the input + * buffer is used as a limit instead. + * + * Note 2: if you don't know the line length, you can leave the line length unset + * (or set to zero) and the parser will hunt for the line start instead. + * + * Then on every frame: + * + * RegisterMap registers; + * if (parser->Parse(buffer, registers) != MdParser::OK) + * much badness; + * Metadata metadata; + * CamHelper::PopulateMetadata(registers, metadata); + * + * (Note that the CamHelper class converts to/from exposure lines and time, + * and gain_code / actual gain.) + * + * If you suspect your embedded data may have changed its layout, change any line + * lengths, number of lines, bits per pixel etc. that are different, and + * then: + * + * parser->Reset(); + * + * before calling Parse again. + */ + +namespace RPiController { + +/* Abstract base class from which other metadata parsers are derived. */ + +class MdParser +{ +public: + using RegisterMap = std::map; + + /* + * Parser status codes: + * OK - success + * NOTFOUND - value such as exposure or gain was not found + * ERROR - all other errors + */ + enum Status { + OK = 0, + NOTFOUND = 1, + ERROR = 2 + }; + + MdParser() + : reset_(true), bitsPerPixel_(0), numLines_(0), lineLengthBytes_(0) + { + } + + virtual ~MdParser() = default; + + void reset() + { + reset_ = true; + } + + void setBitsPerPixel(int bpp) + { + bitsPerPixel_ = bpp; + } + + void setNumLines(unsigned int numLines) + { + numLines_ = numLines; + } + + void setLineLengthBytes(unsigned int numBytes) + { + lineLengthBytes_ = numBytes; + } + + virtual Status parse(libcamera::Span buffer, + RegisterMap ®isters) = 0; + +protected: + bool reset_; + int bitsPerPixel_; + unsigned int numLines_; + unsigned int lineLengthBytes_; +}; + +/* + * This isn't a full implementation of a metadata parser for SMIA sensors, + * however, it does provide the findRegs function which will prove useful and + * make it easier to implement parsers for other SMIA-like sensors (see + * md_parser_imx219.cpp for an example). + */ + +class MdParserSmia final : public MdParser +{ +public: + MdParserSmia(std::initializer_list registerList); + + MdParser::Status parse(libcamera::Span buffer, + RegisterMap ®isters) override; + +private: + /* Maps register address to offset in the buffer. */ + using OffsetMap = std::map>; + + /* + * Note that error codes > 0 are regarded as non-fatal; codes < 0 + * indicate a bad data buffer. Status codes are: + * ParseOk - found all registers, much happiness + * MissingRegs - some registers found; should this be a hard error? + * The remaining codes are all hard errors. + */ + enum ParseStatus { + ParseOk = 0, + MissingRegs = 1, + NoLineStart = -1, + IllegalTag = -2, + BadDummy = -3, + BadLineEnd = -4, + BadPadding = -5 + }; + + ParseStatus findRegs(libcamera::Span buffer); + + OffsetMap offsets_; +}; + +} /* namespace RPi */ diff --git a/src/ipa/rpi/cam_helper/md_parser_smia.cpp b/src/ipa/rpi/cam_helper/md_parser_smia.cpp new file mode 100644 index 00000000..210787ed --- /dev/null +++ b/src/ipa/rpi/cam_helper/md_parser_smia.cpp @@ -0,0 +1,149 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * md_parser_smia.cpp - SMIA specification based embedded data parser + */ + +#include +#include "md_parser.h" + +using namespace RPiController; +using namespace libcamera; + +/* + * This function goes through the embedded data to find the offsets (not + * values!), in the data block, where the values of the given registers can + * subsequently be found. + * + * Embedded data tag bytes, from Sony IMX219 datasheet but general to all SMIA + * sensors, I think. + */ + +constexpr unsigned int LineStart = 0x0a; +constexpr unsigned int LineEndTag = 0x07; +constexpr unsigned int RegHiBits = 0xaa; +constexpr unsigned int RegLowBits = 0xa5; +constexpr unsigned int RegValue = 0x5a; +constexpr unsigned int RegSkip = 0x55; + +MdParserSmia::MdParserSmia(std::initializer_list registerList) +{ + for (auto r : registerList) + offsets_[r] = {}; +} + +MdParser::Status MdParserSmia::parse(libcamera::Span buffer, + RegisterMap ®isters) +{ + if (reset_) { + /* + * Search again through the metadata for all the registers + * requested. + */ + ASSERT(bitsPerPixel_); + + for (const auto &kv : offsets_) + offsets_[kv.first] = {}; + + ParseStatus ret = findRegs(buffer); + /* + * > 0 means "worked partially but parse again next time", + * < 0 means "hard error". + * + * In either case, we retry parsing on the next frame. + */ + if (ret != ParseOk) + return ERROR; + + reset_ = false; + } + + /* Populate the register values requested. */ + registers.clear(); + for (const auto &[reg, offset] : offsets_) { + if (!offset) { + reset_ = true; + return NOTFOUND; + } + registers[reg] = buffer[offset.value()]; + } + + return OK; +} + +MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span buffer) +{ + ASSERT(offsets_.size()); + + if (buffer[0] != LineStart) + return NoLineStart; + + unsigned int currentOffset = 1; /* after the LineStart */ + unsigned int currentLineStart = 0, currentLine = 0; + unsigned int regNum = 0, regsDone = 0; + + while (1) { + int tag = buffer[currentOffset++]; + + if ((bitsPerPixel_ == 10 && + (currentOffset + 1 - currentLineStart) % 5 == 0) || + (bitsPerPixel_ == 12 && + (currentOffset + 1 - currentLineStart) % 3 == 0)) { + if (buffer[currentOffset++] != RegSkip) + return BadDummy; + } + + int dataByte = buffer[currentOffset++]; + + if (tag == LineEndTag) { + if (dataByte != LineEndTag) + return BadLineEnd; + + if (numLines_ && ++currentLine == numLines_) + return MissingRegs; + + if (lineLengthBytes_) { + currentOffset = currentLineStart + lineLengthBytes_; + + /* Require whole line to be in the buffer (if buffer size set). */ + if (buffer.size() && + currentOffset + lineLengthBytes_ > buffer.size()) + return MissingRegs; + + if (buffer[currentOffset] != LineStart) + return NoLineStart; + } else { + /* allow a zero line length to mean "hunt for the next line" */ + while (currentOffset < buffer.size() && + buffer[currentOffset] != LineStart) + currentOffset++; + + if (currentOffset == buffer.size()) + return NoLineStart; + } + + /* inc currentOffset to after LineStart */ + currentLineStart = currentOffset++; + } else { + if (tag == RegHiBits) + regNum = (regNum & 0xff) | (dataByte << 8); + else if (tag == RegLowBits) + regNum = (regNum & 0xff00) | dataByte; + else if (tag == RegSkip) + regNum++; + else if (tag == RegValue) { + auto reg = offsets_.find(regNum); + + if (reg != offsets_.end()) { + offsets_[regNum] = currentOffset - 1; + + if (++regsDone == offsets_.size()) + return ParseOk; + } + regNum++; + } else + return IllegalTag; + } + } +} diff --git a/src/ipa/rpi/cam_helper/meson.build b/src/ipa/rpi/cam_helper/meson.build new file mode 100644 index 00000000..bdf2db8e --- /dev/null +++ b/src/ipa/rpi/cam_helper/meson.build @@ -0,0 +1,26 @@ +# SPDX-License-Identifier: CC0-1.0 + +rpi_ipa_cam_helper_sources = files([ + 'cam_helper.cpp', + 'cam_helper_ov5647.cpp', + 'cam_helper_imx219.cpp', + 'cam_helper_imx290.cpp', + 'cam_helper_imx296.cpp', + 'cam_helper_imx477.cpp', + 'cam_helper_imx519.cpp', + 'cam_helper_imx708.cpp', + 'cam_helper_ov9281.cpp', + 'md_parser_smia.cpp', +]) + +rpi_ipa_cam_helper_includes = [ + include_directories('..'), +] + +rpi_ipa_cam_helper_deps = [ + libcamera_private, +] + +rpi_ipa_cam_helper_lib = static_library('rpi_ipa_cam_helper', rpi_ipa_cam_helper_sources, + include_directories : rpi_ipa_cam_helper_includes, + dependencies : rpi_ipa_cam_helper_deps) diff --git a/src/ipa/rpi/controller/af_algorithm.h b/src/ipa/rpi/controller/af_algorithm.h new file mode 100644 index 00000000..ad9b5754 --- /dev/null +++ b/src/ipa/rpi/controller/af_algorithm.h @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022, Raspberry Pi Ltd + * + * af_algorithm.hpp - auto focus algorithm interface + */ +#pragma once + +#include + +#include + +#include "algorithm.h" + +namespace RPiController { + +class AfAlgorithm : public Algorithm +{ +public: + AfAlgorithm(Controller *controller) + : Algorithm(controller) {} + + /* + * An autofocus algorithm should provide the following calls. + * + * Where a ControlList combines a change of AfMode with other AF + * controls, setMode() should be called first, to ensure the + * algorithm will be in the correct state to handle controls. + * + * setLensPosition() returns true if the mode was AfModeManual and + * the lens position has changed, otherwise returns false. When it + * returns true, hwpos should be sent immediately to the lens driver. + * + * getMode() is provided mainly for validating controls. + * getLensPosition() is provided for populating DeviceStatus. + */ + + enum AfRange { AfRangeNormal = 0, + AfRangeMacro, + AfRangeFull, + AfRangeMax }; + + enum AfSpeed { AfSpeedNormal = 0, + AfSpeedFast, + AfSpeedMax }; + + enum AfMode { AfModeManual = 0, + AfModeAuto, + AfModeContinuous }; + + enum AfPause { AfPauseImmediate = 0, + AfPauseDeferred, + AfPauseResume }; + + virtual void setRange([[maybe_unused]] AfRange range) + { + } + virtual void setSpeed([[maybe_unused]] AfSpeed speed) + { + } + virtual void setMetering([[maybe_unused]] bool use_windows) + { + } + virtual void setWindows([[maybe_unused]] libcamera::Span const &wins) + { + } + virtual void setMode(AfMode mode) = 0; + virtual AfMode getMode() const = 0; + virtual bool setLensPosition(double dioptres, int32_t *hwpos) = 0; + virtual std::optional getLensPosition() const = 0; + virtual void triggerScan() = 0; + virtual void cancelScan() = 0; + virtual void pause(AfPause pause) = 0; +}; + +} // namespace RPiController diff --git a/src/ipa/rpi/controller/af_status.h b/src/ipa/rpi/controller/af_status.h new file mode 100644 index 00000000..92c08812 --- /dev/null +++ b/src/ipa/rpi/controller/af_status.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022, Raspberry Pi Ltd + * + * af_status.h - AF control algorithm status + */ +#pragma once + +#include + +/* + * The AF algorithm should post the following structure into the image's + * "af.status" metadata. lensSetting should control the lens. + */ + +enum class AfState { + Idle = 0, + Scanning, + Focused, + Failed +}; + +enum class AfPauseState { + Running = 0, + Pausing, + Paused +}; + +struct AfStatus { + /* state for reporting */ + AfState state; + AfPauseState pauseState; + /* lensSetting should be sent to the lens driver, when valid */ + std::optional lensSetting; +}; diff --git a/src/ipa/rpi/controller/agc_algorithm.h b/src/ipa/rpi/controller/agc_algorithm.h new file mode 100644 index 00000000..36e6c110 --- /dev/null +++ b/src/ipa/rpi/controller/agc_algorithm.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * agc_algorithm.h - AGC/AEC control algorithm interface + */ +#pragma once + +#include + +#include "algorithm.h" + +namespace RPiController { + +class AgcAlgorithm : public Algorithm +{ +public: + AgcAlgorithm(Controller *controller) : Algorithm(controller) {} + /* An AGC algorithm must provide the following: */ + virtual unsigned int getConvergenceFrames() const = 0; + virtual void setEv(double ev) = 0; + virtual void setFlickerPeriod(libcamera::utils::Duration flickerPeriod) = 0; + virtual void setFixedShutter(libcamera::utils::Duration fixedShutter) = 0; + virtual void setMaxShutter(libcamera::utils::Duration maxShutter) = 0; + virtual void setFixedAnalogueGain(double fixedAnalogueGain) = 0; + virtual void setMeteringMode(std::string const &meteringModeName) = 0; + virtual void setExposureMode(std::string const &exposureModeName) = 0; + virtual void setConstraintMode(std::string const &contraintModeName) = 0; + virtual void enableAuto() = 0; + virtual void disableAuto() = 0; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/agc_status.h b/src/ipa/rpi/controller/agc_status.h new file mode 100644 index 00000000..6abf09d9 --- /dev/null +++ b/src/ipa/rpi/controller/agc_status.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * agc_status.h - AGC/AEC control algorithm status + */ +#pragma once + +#include + +/* + * The AGC algorithm should post the following structure into the image's + * "agc.status" metadata. + */ + +/* + * Note: total_exposure_value will be reported as zero until the algorithm has + * seen statistics and calculated meaningful values. The contents should be + * ignored until then. + */ + +struct AgcStatus { + libcamera::utils::Duration totalExposureValue; /* value for all exposure and gain for this image */ + libcamera::utils::Duration targetExposureValue; /* (unfiltered) target total exposure AGC is aiming for */ + libcamera::utils::Duration shutterTime; + double analogueGain; + char exposureMode[32]; + char constraintMode[32]; + char meteringMode[32]; + double ev; + libcamera::utils::Duration flickerPeriod; + int floatingRegionEnable; + libcamera::utils::Duration fixedShutter; + double fixedAnalogueGain; + double digitalGain; + int locked; +}; diff --git a/src/ipa/rpi/controller/algorithm.cpp b/src/ipa/rpi/controller/algorithm.cpp new file mode 100644 index 00000000..a957fde5 --- /dev/null +++ b/src/ipa/rpi/controller/algorithm.cpp @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * algorithm.cpp - ISP control algorithms + */ + +#include "algorithm.h" + +using namespace RPiController; + +int Algorithm::read([[maybe_unused]] const libcamera::YamlObject ¶ms) +{ + return 0; +} + +void Algorithm::initialise() +{ +} + +void Algorithm::switchMode([[maybe_unused]] CameraMode const &cameraMode, + [[maybe_unused]] Metadata *metadata) +{ +} + +void Algorithm::prepare([[maybe_unused]] Metadata *imageMetadata) +{ +} + +void Algorithm::process([[maybe_unused]] StatisticsPtr &stats, + [[maybe_unused]] Metadata *imageMetadata) +{ +} + +/* For registering algorithms with the system: */ + +namespace { + +std::map &algorithms() +{ + static std::map algorithms; + return algorithms; +} + +} /* namespace */ + +std::map const &RPiController::getAlgorithms() +{ + return algorithms(); +} + +RegisterAlgorithm::RegisterAlgorithm(char const *name, + AlgoCreateFunc createFunc) +{ + algorithms()[std::string(name)] = createFunc; +} diff --git a/src/ipa/rpi/controller/algorithm.h b/src/ipa/rpi/controller/algorithm.h new file mode 100644 index 00000000..4aa814eb --- /dev/null +++ b/src/ipa/rpi/controller/algorithm.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * algorithm.h - ISP control algorithm interface + */ +#pragma once + +/* + * All algorithms should be derived from this class and made available to the + * Controller. + */ + +#include +#include +#include + +#include "libcamera/internal/yaml_parser.h" + +#include "controller.h" + +namespace RPiController { + +/* This defines the basic interface for all control algorithms. */ + +class Algorithm +{ +public: + Algorithm(Controller *controller) + : controller_(controller) + { + } + virtual ~Algorithm() = default; + virtual char const *name() const = 0; + virtual int read(const libcamera::YamlObject ¶ms); + virtual void initialise(); + virtual void switchMode(CameraMode const &cameraMode, Metadata *metadata); + virtual void prepare(Metadata *imageMetadata); + virtual void process(StatisticsPtr &stats, Metadata *imageMetadata); + Metadata &getGlobalMetadata() const + { + return controller_->getGlobalMetadata(); + } + const std::string &getTarget() const + { + return controller_->getTarget(); + } + const Controller::HardwareConfig &getHardwareConfig() const + { + return controller_->getHardwareConfig(); + } + +private: + Controller *controller_; +}; + +/* + * This code is for automatic registration of Front End algorithms with the + * system. + */ + +typedef Algorithm *(*AlgoCreateFunc)(Controller *controller); +struct RegisterAlgorithm { + RegisterAlgorithm(char const *name, AlgoCreateFunc createFunc); +}; +std::map const &getAlgorithms(); + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/alsc_status.h b/src/ipa/rpi/controller/alsc_status.h new file mode 100644 index 00000000..49a9f4a0 --- /dev/null +++ b/src/ipa/rpi/controller/alsc_status.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * alsc_status.h - ALSC (auto lens shading correction) control algorithm status + */ +#pragma once + +#include + +/* + * The ALSC algorithm should post the following structure into the image's + * "alsc.status" metadata. + */ + +struct AlscStatus { + std::vector r; + std::vector g; + std::vector b; + unsigned int rows; + unsigned int cols; +}; diff --git a/src/ipa/rpi/controller/awb_algorithm.h b/src/ipa/rpi/controller/awb_algorithm.h new file mode 100644 index 00000000..8462c4db --- /dev/null +++ b/src/ipa/rpi/controller/awb_algorithm.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * awb_algorithm.h - AWB control algorithm interface + */ +#pragma once + +#include "algorithm.h" + +namespace RPiController { + +class AwbAlgorithm : public Algorithm +{ +public: + AwbAlgorithm(Controller *controller) : Algorithm(controller) {} + /* An AWB algorithm must provide the following: */ + virtual unsigned int getConvergenceFrames() const = 0; + virtual void setMode(std::string const &modeName) = 0; + virtual void setManualGains(double manualR, double manualB) = 0; + virtual void enableAuto() = 0; + virtual void disableAuto() = 0; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/awb_status.h b/src/ipa/rpi/controller/awb_status.h new file mode 100644 index 00000000..dd5a79e3 --- /dev/null +++ b/src/ipa/rpi/controller/awb_status.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * awb_status.h - AWB control algorithm status + */ +#pragma once + +/* + * The AWB algorithm places its results into both the image and global metadata, + * under the tag "awb.status". + */ + +struct AwbStatus { + char mode[32]; + double temperatureK; + double gainR; + double gainG; + double gainB; +}; diff --git a/src/ipa/rpi/controller/black_level_status.h b/src/ipa/rpi/controller/black_level_status.h new file mode 100644 index 00000000..fd5e4ccb --- /dev/null +++ b/src/ipa/rpi/controller/black_level_status.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * black_level_status.h - black level control algorithm status + */ +#pragma once + +/* The "black level" algorithm stores the black levels to use. */ + +struct BlackLevelStatus { + uint16_t blackLevelR; /* out of 16 bits */ + uint16_t blackLevelG; + uint16_t blackLevelB; +}; 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 + +#include + +/* + * 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; +}; diff --git a/src/ipa/rpi/controller/ccm_algorithm.h b/src/ipa/rpi/controller/ccm_algorithm.h new file mode 100644 index 00000000..e2c4d771 --- /dev/null +++ b/src/ipa/rpi/controller/ccm_algorithm.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * ccm_algorithm.h - CCM (colour correction matrix) control algorithm interface + */ +#pragma once + +#include "algorithm.h" + +namespace RPiController { + +class CcmAlgorithm : public Algorithm +{ +public: + CcmAlgorithm(Controller *controller) : Algorithm(controller) {} + /* A CCM algorithm must provide the following: */ + virtual void setSaturation(double saturation) = 0; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/ccm_status.h b/src/ipa/rpi/controller/ccm_status.h new file mode 100644 index 00000000..5e28ee7c --- /dev/null +++ b/src/ipa/rpi/controller/ccm_status.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * ccm_status.h - CCM (colour correction matrix) control algorithm status + */ +#pragma once + +/* The "ccm" algorithm generates an appropriate colour matrix. */ + +struct CcmStatus { + double matrix[9]; + double saturation; +}; diff --git a/src/ipa/rpi/controller/contrast_algorithm.h b/src/ipa/rpi/controller/contrast_algorithm.h new file mode 100644 index 00000000..ce17a4f9 --- /dev/null +++ b/src/ipa/rpi/controller/contrast_algorithm.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * contrast_algorithm.h - contrast (gamma) control algorithm interface + */ +#pragma once + +#include "algorithm.h" + +namespace RPiController { + +class ContrastAlgorithm : public Algorithm +{ +public: + ContrastAlgorithm(Controller *controller) : Algorithm(controller) {} + /* A contrast algorithm must provide the following: */ + virtual void setBrightness(double brightness) = 0; + virtual void setContrast(double contrast) = 0; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/contrast_status.h b/src/ipa/rpi/controller/contrast_status.h new file mode 100644 index 00000000..fb9fe4ba --- /dev/null +++ b/src/ipa/rpi/controller/contrast_status.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * contrast_status.h - contrast (gamma) control algorithm status + */ +#pragma once + +#include "pwl.h" + +/* + * The "contrast" algorithm creates a gamma curve, optionally doing a little bit + * of contrast stretching based on the AGC histogram. + */ + +struct ContrastStatus { + RPiController::Pwl gammaCurve; + double brightness; + double contrast; +}; diff --git a/src/ipa/rpi/controller/controller.cpp b/src/ipa/rpi/controller/controller.cpp new file mode 100644 index 00000000..fa172113 --- /dev/null +++ b/src/ipa/rpi/controller/controller.cpp @@ -0,0 +1,181 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * controller.cpp - ISP controller + */ + +#include + +#include +#include + +#include "libcamera/internal/yaml_parser.h" + +#include "algorithm.h" +#include "controller.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiController) + +static const std::map HardwareConfigMap = { + { + "bcm2835", + { + /* + * There are only ever 15 AGC regions computed by the firmware + * due to zoning, but the HW defines AGC_REGIONS == 16! + */ + .agcRegions = { 15 , 1 }, + .agcZoneWeights = { 15 , 1 }, + .awbRegions = { 16, 12 }, + .focusRegions = { 4, 3 }, + .numHistogramBins = 128, + .numGammaPoints = 33, + .pipelineWidth = 13 + } + }, +}; + +Controller::Controller() + : switchModeCalled_(false) +{ +} + +Controller::~Controller() {} + +int Controller::read(char const *filename) +{ + File file(filename); + if (!file.open(File::OpenModeFlag::ReadOnly)) { + LOG(RPiController, Warning) + << "Failed to open tuning file '" << filename << "'"; + return -EINVAL; + } + + std::unique_ptr root = YamlParser::parse(file); + double version = (*root)["version"].get(1.0); + target_ = (*root)["target"].get("bcm2835"); + + if (version < 2.0) { + LOG(RPiController, Warning) + << "This format of the tuning file will be deprecated soon!" + << " Please use the convert_tuning.py utility to update to version 2.0."; + + for (auto const &[key, value] : root->asDict()) { + int ret = createAlgorithm(key, value); + if (ret) + return ret; + } + } else if (version < 3.0) { + if (!root->contains("algorithms")) { + LOG(RPiController, Error) + << "Tuning file " << filename + << " does not have an \"algorithms\" list!"; + return -EINVAL; + } + + for (auto const &rootAlgo : (*root)["algorithms"].asList()) + for (auto const &[key, value] : rootAlgo.asDict()) { + int ret = createAlgorithm(key, value); + if (ret) + return ret; + } + } else { + LOG(RPiController, Error) + << "Unrecognised version " << version + << " for the tuning file " << filename; + return -EINVAL; + } + + return 0; +} + +int Controller::createAlgorithm(const std::string &name, const YamlObject ¶ms) +{ + auto it = getAlgorithms().find(name); + if (it == getAlgorithms().end()) { + LOG(RPiController, Warning) + << "No algorithm found for \"" << name << "\""; + return 0; + } + + Algorithm *algo = (*it->second)(this); + int ret = algo->read(params); + if (ret) + return ret; + + algorithms_.push_back(AlgorithmPtr(algo)); + return 0; +} + +void Controller::initialise() +{ + for (auto &algo : algorithms_) + algo->initialise(); +} + +void Controller::switchMode(CameraMode const &cameraMode, Metadata *metadata) +{ + for (auto &algo : algorithms_) + algo->switchMode(cameraMode, metadata); + switchModeCalled_ = true; +} + +void Controller::prepare(Metadata *imageMetadata) +{ + assert(switchModeCalled_); + for (auto &algo : algorithms_) + algo->prepare(imageMetadata); +} + +void Controller::process(StatisticsPtr stats, Metadata *imageMetadata) +{ + assert(switchModeCalled_); + for (auto &algo : algorithms_) + algo->process(stats, imageMetadata); +} + +Metadata &Controller::getGlobalMetadata() +{ + return globalMetadata_; +} + +Algorithm *Controller::getAlgorithm(std::string const &name) const +{ + /* + * The passed name must be the entire algorithm name, or must match the + * last part of it with a period (.) just before. + */ + size_t nameLen = name.length(); + for (auto &algo : algorithms_) { + char const *algoName = algo->name(); + size_t algoNameLen = strlen(algoName); + if (algoNameLen >= nameLen && + strcasecmp(name.c_str(), + algoName + algoNameLen - nameLen) == 0 && + (nameLen == algoNameLen || + algoName[algoNameLen - nameLen - 1] == '.')) + return algo.get(); + } + return nullptr; +} + +const std::string &Controller::getTarget() const +{ + return target_; +} + +const Controller::HardwareConfig &Controller::getHardwareConfig() const +{ + auto cfg = HardwareConfigMap.find(getTarget()); + + /* + * This really should not happen, the IPA ought to validate the target + * on initialisation. + */ + ASSERT(cfg != HardwareConfigMap.end()); + return cfg->second; +} diff --git a/src/ipa/rpi/controller/controller.h b/src/ipa/rpi/controller/controller.h new file mode 100644 index 00000000..c6af5cd6 --- /dev/null +++ b/src/ipa/rpi/controller/controller.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * controller.h - ISP controller interface + */ +#pragma once + +/* + * The Controller is simply a container for a collecting together a number of + * "control algorithms" (such as AWB etc.) and for running them all in a + * convenient manner. + */ + +#include +#include + +#include "libcamera/internal/yaml_parser.h" + +#include "camera_mode.h" +#include "device_status.h" +#include "metadata.h" +#include "statistics.h" + +namespace RPiController { + +class Algorithm; +typedef std::unique_ptr AlgorithmPtr; + +/* + * The Controller holds a pointer to some global_metadata, which is how + * different controllers and control algorithms within them can exchange + * information. The Prepare function returns a pointer to metadata for this + * specific image, and which should be passed on to the Process function. + */ + +class Controller +{ +public: + struct HardwareConfig { + libcamera::Size agcRegions; + libcamera::Size agcZoneWeights; + libcamera::Size awbRegions; + libcamera::Size focusRegions; + unsigned int numHistogramBins; + unsigned int numGammaPoints; + unsigned int pipelineWidth; + }; + + Controller(); + ~Controller(); + int read(char const *filename); + void initialise(); + void switchMode(CameraMode const &cameraMode, Metadata *metadata); + void prepare(Metadata *imageMetadata); + void process(StatisticsPtr stats, Metadata *imageMetadata); + Metadata &getGlobalMetadata(); + Algorithm *getAlgorithm(std::string const &name) const; + const std::string &getTarget() const; + const HardwareConfig &getHardwareConfig() const; + +protected: + int createAlgorithm(const std::string &name, const libcamera::YamlObject ¶ms); + + Metadata globalMetadata_; + std::vector algorithms_; + bool switchModeCalled_; + +private: + std::string target_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/denoise_algorithm.h b/src/ipa/rpi/controller/denoise_algorithm.h new file mode 100644 index 00000000..52009ba9 --- /dev/null +++ b/src/ipa/rpi/controller/denoise_algorithm.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2021, Raspberry Pi Ltd + * + * denoise.h - Denoise control algorithm interface + */ +#pragma once + +#include "algorithm.h" + +namespace RPiController { + +enum class DenoiseMode { Off, ColourOff, ColourFast, ColourHighQuality }; + +class DenoiseAlgorithm : public Algorithm +{ +public: + DenoiseAlgorithm(Controller *controller) : Algorithm(controller) {} + /* A Denoise algorithm must provide the following: */ + virtual void setMode(DenoiseMode mode) = 0; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/denoise_status.h b/src/ipa/rpi/controller/denoise_status.h new file mode 100644 index 00000000..f6b9ee29 --- /dev/null +++ b/src/ipa/rpi/controller/denoise_status.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * denoise_status.h - Denoise control algorithm status + */ +#pragma once + +/* This stores the parameters required for Denoise. */ + +struct DenoiseStatus { + double noiseConstant; + double noiseSlope; + double strength; + unsigned int mode; +}; diff --git a/src/ipa/rpi/controller/device_status.cpp b/src/ipa/rpi/controller/device_status.cpp new file mode 100644 index 00000000..c907efdd --- /dev/null +++ b/src/ipa/rpi/controller/device_status.cpp @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2021, Raspberry Pi Ltd + * + * device_status.cpp - device (image sensor) status + */ +#include "device_status.h" + +using namespace libcamera; /* for the Duration operator<< overload */ + +std::ostream &operator<<(std::ostream &out, const DeviceStatus &d) +{ + out << "Exposure: " << d.shutterSpeed + << " Frame length: " << d.frameLength + << " Line length: " << d.lineLength + << " Gain: " << d.analogueGain; + + if (d.aperture) + out << " Aperture: " << *d.aperture; + + if (d.lensPosition) + out << " Lens: " << *d.lensPosition; + + if (d.flashIntensity) + out << " Flash: " << *d.flashIntensity; + + if (d.sensorTemperature) + out << " Temperature: " << *d.sensorTemperature; + + return out; +} diff --git a/src/ipa/rpi/controller/device_status.h b/src/ipa/rpi/controller/device_status.h new file mode 100644 index 00000000..c45db749 --- /dev/null +++ b/src/ipa/rpi/controller/device_status.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * device_status.h - device (image sensor) status + */ +#pragma once + +#include +#include + +#include + +/* + * Definition of "device metadata" which stores things like shutter time and + * analogue gain that downstream control algorithms will want to know. + */ + +struct DeviceStatus { + DeviceStatus() + : shutterSpeed(std::chrono::seconds(0)), frameLength(0), + lineLength(std::chrono::seconds(0)), analogueGain(0.0) + { + } + + friend std::ostream &operator<<(std::ostream &out, const DeviceStatus &d); + + /* time shutter is open */ + libcamera::utils::Duration shutterSpeed; + /* frame length given in number of lines */ + uint32_t frameLength; + /* line length for the current frame */ + libcamera::utils::Duration lineLength; + double analogueGain; + /* 1.0/distance-in-metres */ + std::optional lensPosition; + /* 1/f so that brightness quadruples when this doubles */ + std::optional aperture; + /* proportional to brightness with 0 = no flash, 1 = maximum flash */ + std::optional flashIntensity; + /* Sensor reported temperature value (in degrees) */ + std::optional sensorTemperature; +}; diff --git a/src/ipa/rpi/controller/dpc_status.h b/src/ipa/rpi/controller/dpc_status.h new file mode 100644 index 00000000..46d0cf34 --- /dev/null +++ b/src/ipa/rpi/controller/dpc_status.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * dpc_status.h - DPC (defective pixel correction) control algorithm status + */ +#pragma once + +/* The "DPC" algorithm sets defective pixel correction strength. */ + +struct DpcStatus { + int strength; /* 0 = "off", 1 = "normal", 2 = "strong" */ +}; diff --git a/src/ipa/rpi/controller/geq_status.h b/src/ipa/rpi/controller/geq_status.h new file mode 100644 index 00000000..2d749fc9 --- /dev/null +++ b/src/ipa/rpi/controller/geq_status.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * geq_status.h - GEQ (green equalisation) control algorithm status + */ +#pragma once + +/* The "GEQ" algorithm calculates the green equalisation thresholds */ + +struct GeqStatus { + uint16_t offset; + double slope; +}; diff --git a/src/ipa/rpi/controller/histogram.cpp b/src/ipa/rpi/controller/histogram.cpp new file mode 100644 index 00000000..16a9207f --- /dev/null +++ b/src/ipa/rpi/controller/histogram.cpp @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * histogram.cpp - histogram calculations + */ +#include +#include + +#include "histogram.h" + +using namespace RPiController; + +uint64_t Histogram::cumulativeFreq(double bin) const +{ + if (bin <= 0) + return 0; + else if (bin >= bins()) + return total(); + int b = (int)bin; + return cumulative_[b] + + (bin - b) * (cumulative_[b + 1] - cumulative_[b]); +} + +double Histogram::quantile(double q, int first, int last) const +{ + if (first == -1) + first = 0; + if (last == -1) + last = cumulative_.size() - 2; + assert(first <= last); + uint64_t items = q * total(); + while (first < last) /* binary search to find the right bin */ + { + int middle = (first + last) / 2; + if (cumulative_[middle + 1] > items) + last = middle; /* between first and middle */ + else + first = middle + 1; /* after middle */ + } + assert(items >= cumulative_[first] && items <= cumulative_[last + 1]); + double frac = cumulative_[first + 1] == cumulative_[first] ? 0 + : (double)(items - cumulative_[first]) / + (cumulative_[first + 1] - cumulative_[first]); + return first + frac; +} + +double Histogram::interQuantileMean(double qLo, double qHi) const +{ + assert(qHi > qLo); + double pLo = quantile(qLo); + double pHi = quantile(qHi, (int)pLo); + double sumBinFreq = 0, cumulFreq = 0; + for (double pNext = floor(pLo) + 1.0; pNext <= ceil(pHi); + pLo = pNext, pNext += 1.0) { + int bin = floor(pLo); + double freq = (cumulative_[bin + 1] - cumulative_[bin]) * + (std::min(pNext, pHi) - pLo); + sumBinFreq += bin * freq; + cumulFreq += freq; + } + /* add 0.5 to give an average for bin mid-points */ + return sumBinFreq / cumulFreq + 0.5; +} diff --git a/src/ipa/rpi/controller/histogram.h b/src/ipa/rpi/controller/histogram.h new file mode 100644 index 00000000..6b3e3a9e --- /dev/null +++ b/src/ipa/rpi/controller/histogram.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * histogram.h - histogram calculation interface + */ +#pragma once + +#include +#include +#include + +/* + * A simple histogram class, for use in particular to find "quantiles" and + * averages between "quantiles". + */ + +namespace RPiController { + +class Histogram +{ +public: + Histogram() + { + cumulative_.push_back(0); + } + + template Histogram(T *histogram, int num) + { + assert(num); + cumulative_.reserve(num + 1); + cumulative_.push_back(0); + for (int i = 0; i < num; i++) + cumulative_.push_back(cumulative_.back() + + histogram[i]); + } + uint32_t bins() const { return cumulative_.size() - 1; } + uint64_t total() const { return cumulative_[cumulative_.size() - 1]; } + /* Cumulative frequency up to a (fractional) point in a bin. */ + uint64_t cumulativeFreq(double bin) const; + /* + * Return the (fractional) bin of the point q (0 <= q <= 1) through the + * histogram. Optionally provide limits to help. + */ + double quantile(double q, int first = -1, int last = -1) const; + /* Return the average histogram bin value between the two quantiles. */ + double interQuantileMean(double qLo, double qHi) const; + +private: + std::vector cumulative_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/lux_status.h b/src/ipa/rpi/controller/lux_status.h new file mode 100644 index 00000000..5eb9faac --- /dev/null +++ b/src/ipa/rpi/controller/lux_status.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * lux_status.h - Lux control algorithm status + */ +#pragma once + +/* + * The "lux" algorithm looks at the (AGC) histogram statistics of the frame and + * estimates the current lux level of the scene. It does this by a simple ratio + * calculation comparing to a reference image that was taken in known conditions + * with known statistics and a properly measured lux level. There is a slight + * problem with aperture, in that it may be variable without the system knowing + * or being aware of it. In this case an external application may set a + * "current_aperture" value if it wishes, which would be used in place of the + * (presumably meaningless) value in the image metadata. + */ + +struct LuxStatus { + double lux; + double aperture; +}; diff --git a/src/ipa/rpi/controller/meson.build b/src/ipa/rpi/controller/meson.build new file mode 100644 index 00000000..feb0334e --- /dev/null +++ b/src/ipa/rpi/controller/meson.build @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: CC0-1.0 + +rpi_ipa_controller_sources = files([ + 'algorithm.cpp', + 'controller.cpp', + 'device_status.cpp', + 'histogram.cpp', + 'pwl.cpp', + 'rpi/af.cpp', + 'rpi/agc.cpp', + 'rpi/alsc.cpp', + 'rpi/awb.cpp', + 'rpi/black_level.cpp', + 'rpi/ccm.cpp', + 'rpi/contrast.cpp', + 'rpi/dpc.cpp', + 'rpi/geq.cpp', + 'rpi/lux.cpp', + 'rpi/noise.cpp', + 'rpi/sdn.cpp', + 'rpi/sharpen.cpp', +]) + +rpi_ipa_controller_deps = [ + libcamera_private, +] + +rpi_ipa_controller_lib = static_library('rpi_ipa_controller', rpi_ipa_controller_sources, + dependencies : rpi_ipa_controller_deps) diff --git a/src/ipa/rpi/controller/metadata.h b/src/ipa/rpi/controller/metadata.h new file mode 100644 index 00000000..bf8a2393 --- /dev/null +++ b/src/ipa/rpi/controller/metadata.h @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * metadata.h - general metadata class + */ +#pragma once + +/* A simple class for carrying arbitrary metadata, for example about an image. */ + +#include +#include +#include +#include + +#include + +namespace RPiController { + +class LIBCAMERA_TSA_CAPABILITY("mutex") Metadata +{ +public: + Metadata() = default; + + Metadata(Metadata const &other) + { + std::scoped_lock otherLock(other.mutex_); + data_ = other.data_; + } + + Metadata(Metadata &&other) + { + std::scoped_lock otherLock(other.mutex_); + data_ = std::move(other.data_); + other.data_.clear(); + } + + template + void set(std::string const &tag, T const &value) + { + std::scoped_lock lock(mutex_); + data_[tag] = value; + } + + template + int get(std::string const &tag, T &value) const + { + std::scoped_lock lock(mutex_); + auto it = data_.find(tag); + if (it == data_.end()) + return -1; + value = std::any_cast(it->second); + return 0; + } + + void clear() + { + std::scoped_lock lock(mutex_); + data_.clear(); + } + + Metadata &operator=(Metadata const &other) + { + std::scoped_lock lock(mutex_, other.mutex_); + data_ = other.data_; + return *this; + } + + Metadata &operator=(Metadata &&other) + { + std::scoped_lock lock(mutex_, other.mutex_); + data_ = std::move(other.data_); + other.data_.clear(); + return *this; + } + + void merge(Metadata &other) + { + std::scoped_lock lock(mutex_, other.mutex_); + data_.merge(other.data_); + } + + void mergeCopy(const Metadata &other) + { + std::scoped_lock lock(mutex_, other.mutex_); + /* + * If the metadata key exists, ignore this item and copy only + * unique key/value pairs. + */ + data_.insert(other.data_.begin(), other.data_.end()); + } + + template + T *getLocked(std::string const &tag) + { + /* + * This allows in-place access to the Metadata contents, + * for which you should be holding the lock. + */ + auto it = data_.find(tag); + if (it == data_.end()) + return nullptr; + return std::any_cast(&it->second); + } + + template + void setLocked(std::string const &tag, T const &value) + { + /* Use this only if you're holding the lock yourself. */ + data_[tag] = value; + } + + /* + * Note: use of (lowercase) lock and unlock means you can create scoped + * locks with the standard lock classes. + * e.g. std::lock_guard lock(metadata) + */ + void lock() LIBCAMERA_TSA_ACQUIRE() { mutex_.lock(); } + void unlock() LIBCAMERA_TSA_RELEASE() { mutex_.unlock(); } + +private: + mutable std::mutex mutex_; + std::map data_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/noise_status.h b/src/ipa/rpi/controller/noise_status.h new file mode 100644 index 00000000..da194f71 --- /dev/null +++ b/src/ipa/rpi/controller/noise_status.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * noise_status.h - Noise control algorithm status + */ +#pragma once + +/* The "noise" algorithm stores an estimate of the noise profile for this image. */ + +struct NoiseStatus { + double noiseConstant; + double noiseSlope; +}; diff --git a/src/ipa/rpi/controller/pdaf_data.h b/src/ipa/rpi/controller/pdaf_data.h new file mode 100644 index 00000000..470510f2 --- /dev/null +++ b/src/ipa/rpi/controller/pdaf_data.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022, Raspberry Pi Ltd + * + * pdaf_data.h - PDAF Metadata + */ +#pragma once + +#include + +#include "region_stats.h" + +namespace RPiController { + +struct PdafData { + /* Confidence, in arbitrary units */ + uint16_t conf; + /* Phase error, in s16 Q4 format (S.11.4) */ + int16_t phase; +}; + +using PdafRegions = RegionStats; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/pwl.cpp b/src/ipa/rpi/controller/pwl.cpp new file mode 100644 index 00000000..70c2e24b --- /dev/null +++ b/src/ipa/rpi/controller/pwl.cpp @@ -0,0 +1,269 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * pwl.cpp - piecewise linear functions + */ + +#include +#include +#include + +#include "pwl.h" + +using namespace RPiController; + +int Pwl::read(const libcamera::YamlObject ¶ms) +{ + if (!params.size() || params.size() % 2) + return -EINVAL; + + const auto &list = params.asList(); + + for (auto it = list.begin(); it != list.end(); it++) { + auto x = it->get(); + if (!x) + return -EINVAL; + if (it != list.begin() && *x <= points_.back().x) + return -EINVAL; + + auto y = (++it)->get(); + if (!y) + return -EINVAL; + + points_.push_back(Point(*x, *y)); + } + + return 0; +} + +void Pwl::append(double x, double y, const double eps) +{ + if (points_.empty() || points_.back().x + eps < x) + points_.push_back(Point(x, y)); +} + +void Pwl::prepend(double x, double y, const double eps) +{ + if (points_.empty() || points_.front().x - eps > x) + points_.insert(points_.begin(), Point(x, y)); +} + +Pwl::Interval Pwl::domain() const +{ + return Interval(points_[0].x, points_[points_.size() - 1].x); +} + +Pwl::Interval Pwl::range() const +{ + double lo = points_[0].y, hi = lo; + for (auto &p : points_) + lo = std::min(lo, p.y), hi = std::max(hi, p.y); + return Interval(lo, hi); +} + +bool Pwl::empty() const +{ + return points_.empty(); +} + +double Pwl::eval(double x, int *spanPtr, bool updateSpan) const +{ + int span = findSpan(x, spanPtr && *spanPtr != -1 ? *spanPtr : points_.size() / 2 - 1); + if (spanPtr && updateSpan) + *spanPtr = span; + return points_[span].y + + (x - points_[span].x) * (points_[span + 1].y - points_[span].y) / + (points_[span + 1].x - points_[span].x); +} + +int Pwl::findSpan(double x, int span) const +{ + /* + * Pwls are generally small, so linear search may well be faster than + * binary, though could review this if large PWls start turning up. + */ + int lastSpan = points_.size() - 2; + /* + * some algorithms may call us with span pointing directly at the last + * control point + */ + span = std::max(0, std::min(lastSpan, span)); + while (span < lastSpan && x >= points_[span + 1].x) + span++; + while (span && x < points_[span].x) + span--; + return span; +} + +Pwl::PerpType Pwl::invert(Point const &xy, Point &perp, int &span, + const double eps) const +{ + assert(span >= -1); + bool prevOffEnd = false; + for (span = span + 1; span < (int)points_.size() - 1; span++) { + Point spanVec = points_[span + 1] - points_[span]; + double t = ((xy - points_[span]) % spanVec) / spanVec.len2(); + if (t < -eps) /* off the start of this span */ + { + if (span == 0) { + perp = points_[span]; + return PerpType::Start; + } else if (prevOffEnd) { + perp = points_[span]; + return PerpType::Vertex; + } + } else if (t > 1 + eps) /* off the end of this span */ + { + if (span == (int)points_.size() - 2) { + perp = points_[span + 1]; + return PerpType::End; + } + prevOffEnd = true; + } else /* a true perpendicular */ + { + perp = points_[span] + spanVec * t; + return PerpType::Perpendicular; + } + } + return PerpType::None; +} + +Pwl Pwl::inverse(bool *trueInverse, const double eps) const +{ + bool appended = false, prepended = false, neither = false; + Pwl inverse; + + for (Point const &p : points_) { + if (inverse.empty()) + inverse.append(p.y, p.x, eps); + else if (std::abs(inverse.points_.back().x - p.y) <= eps || + std::abs(inverse.points_.front().x - p.y) <= eps) + /* do nothing */; + else if (p.y > inverse.points_.back().x) { + inverse.append(p.y, p.x, eps); + appended = true; + } else if (p.y < inverse.points_.front().x) { + inverse.prepend(p.y, p.x, eps); + prepended = true; + } else + neither = true; + } + + /* + * This is not a proper inverse if we found ourselves putting points + * onto both ends of the inverse, or if there were points that couldn't + * go on either. + */ + if (trueInverse) + *trueInverse = !(neither || (appended && prepended)); + + return inverse; +} + +Pwl Pwl::compose(Pwl const &other, const double eps) const +{ + double thisX = points_[0].x, thisY = points_[0].y; + int thisSpan = 0, otherSpan = other.findSpan(thisY, 0); + Pwl result({ { thisX, other.eval(thisY, &otherSpan, false) } }); + while (thisSpan != (int)points_.size() - 1) { + double dx = points_[thisSpan + 1].x - points_[thisSpan].x, + dy = points_[thisSpan + 1].y - points_[thisSpan].y; + if (std::abs(dy) > eps && + otherSpan + 1 < (int)other.points_.size() && + points_[thisSpan + 1].y >= + other.points_[otherSpan + 1].x + eps) { + /* + * next control point in result will be where this + * function's y reaches the next span in other + */ + thisX = points_[thisSpan].x + + (other.points_[otherSpan + 1].x - + points_[thisSpan].y) * + dx / dy; + thisY = other.points_[++otherSpan].x; + } else if (std::abs(dy) > eps && otherSpan > 0 && + points_[thisSpan + 1].y <= + other.points_[otherSpan - 1].x - eps) { + /* + * next control point in result will be where this + * function's y reaches the previous span in other + */ + thisX = points_[thisSpan].x + + (other.points_[otherSpan + 1].x - + points_[thisSpan].y) * + dx / dy; + thisY = other.points_[--otherSpan].x; + } else { + /* we stay in the same span in other */ + thisSpan++; + thisX = points_[thisSpan].x, + thisY = points_[thisSpan].y; + } + result.append(thisX, other.eval(thisY, &otherSpan, false), + eps); + } + return result; +} + +void Pwl::map(std::function f) const +{ + for (auto &pt : points_) + f(pt.x, pt.y); +} + +void Pwl::map2(Pwl const &pwl0, Pwl const &pwl1, + std::function f) +{ + int span0 = 0, span1 = 0; + double x = std::min(pwl0.points_[0].x, pwl1.points_[0].x); + f(x, pwl0.eval(x, &span0, false), pwl1.eval(x, &span1, false)); + while (span0 < (int)pwl0.points_.size() - 1 || + span1 < (int)pwl1.points_.size() - 1) { + if (span0 == (int)pwl0.points_.size() - 1) + x = pwl1.points_[++span1].x; + else if (span1 == (int)pwl1.points_.size() - 1) + x = pwl0.points_[++span0].x; + else if (pwl0.points_[span0 + 1].x > pwl1.points_[span1 + 1].x) + x = pwl1.points_[++span1].x; + else + x = pwl0.points_[++span0].x; + f(x, pwl0.eval(x, &span0, false), pwl1.eval(x, &span1, false)); + } +} + +Pwl Pwl::combine(Pwl const &pwl0, Pwl const &pwl1, + std::function f, + const double eps) +{ + Pwl result; + map2(pwl0, pwl1, [&](double x, double y0, double y1) { + result.append(x, f(x, y0, y1), eps); + }); + return result; +} + +void Pwl::matchDomain(Interval const &domain, bool clip, const double eps) +{ + int span = 0; + prepend(domain.start, eval(clip ? points_[0].x : domain.start, &span), + eps); + span = points_.size() - 2; + append(domain.end, eval(clip ? points_.back().x : domain.end, &span), + eps); +} + +Pwl &Pwl::operator*=(double d) +{ + for (auto &pt : points_) + pt.y *= d; + return *this; +} + +void Pwl::debug(FILE *fp) const +{ + fprintf(fp, "Pwl {\n"); + for (auto &p : points_) + fprintf(fp, "\t(%g, %g)\n", p.x, p.y); + fprintf(fp, "}\n"); +} diff --git a/src/ipa/rpi/controller/pwl.h b/src/ipa/rpi/controller/pwl.h new file mode 100644 index 00000000..aacf6039 --- /dev/null +++ b/src/ipa/rpi/controller/pwl.h @@ -0,0 +1,127 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * pwl.h - piecewise linear functions interface + */ +#pragma once + +#include +#include +#include + +#include "libcamera/internal/yaml_parser.h" + +namespace RPiController { + +class Pwl +{ +public: + struct Interval { + Interval(double _start, double _end) + : start(_start), end(_end) + { + } + double start, end; + bool contains(double value) + { + return value >= start && value <= end; + } + double clip(double value) + { + return value < start ? start + : (value > end ? end : value); + } + double len() const { return end - start; } + }; + struct Point { + Point() : x(0), y(0) {} + Point(double _x, double _y) + : x(_x), y(_y) {} + double x, y; + Point operator-(Point const &p) const + { + return Point(x - p.x, y - p.y); + } + Point operator+(Point const &p) const + { + return Point(x + p.x, y + p.y); + } + double operator%(Point const &p) const + { + return x * p.x + y * p.y; + } + Point operator*(double f) const { return Point(x * f, y * f); } + Point operator/(double f) const { return Point(x / f, y / f); } + double len2() const { return x * x + y * y; } + double len() const { return sqrt(len2()); } + }; + Pwl() {} + Pwl(std::vector const &points) : points_(points) {} + int read(const libcamera::YamlObject ¶ms); + void append(double x, double y, const double eps = 1e-6); + void prepend(double x, double y, const double eps = 1e-6); + Interval domain() const; + Interval range() const; + bool empty() const; + /* + * Evaluate Pwl, optionally supplying an initial guess for the + * "span". The "span" may be optionally be updated. If you want to know + * the "span" value but don't have an initial guess you can set it to + * -1. + */ + double eval(double x, int *spanPtr = nullptr, + bool updateSpan = true) const; + /* + * Find perpendicular closest to xy, starting from span+1 so you can + * call it repeatedly to check for multiple closest points (set span to + * -1 on the first call). Also returns "pseudo" perpendiculars; see + * PerpType enum. + */ + enum class PerpType { + None, /* no perpendicular found */ + Start, /* start of Pwl is closest point */ + End, /* end of Pwl is closest point */ + Vertex, /* vertex of Pwl is closest point */ + Perpendicular /* true perpendicular found */ + }; + PerpType invert(Point const &xy, Point &perp, int &span, + const double eps = 1e-6) const; + /* + * Compute the inverse function. Indicate if it is a proper (true) + * inverse, or only a best effort (e.g. input was non-monotonic). + */ + Pwl inverse(bool *trueInverse = nullptr, const double eps = 1e-6) const; + /* Compose two Pwls together, doing "this" first and "other" after. */ + Pwl compose(Pwl const &other, const double eps = 1e-6) const; + /* Apply function to (x,y) values at every control point. */ + void map(std::function f) const; + /* + * Apply function to (x, y0, y1) values wherever either Pwl has a + * control point. + */ + static void map2(Pwl const &pwl0, Pwl const &pwl1, + std::function f); + /* + * Combine two Pwls, meaning we create a new Pwl where the y values are + * given by running f wherever either has a knot. + */ + static Pwl + combine(Pwl const &pwl0, Pwl const &pwl1, + std::function f, + const double eps = 1e-6); + /* + * Make "this" match (at least) the given domain. Any extension my be + * clipped or linear. + */ + void matchDomain(Interval const &domain, bool clip = true, + const double eps = 1e-6); + Pwl &operator*=(double d); + void debug(FILE *fp = stdout) const; + +private: + int findSpan(double x, int span) const; + std::vector points_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/region_stats.h b/src/ipa/rpi/controller/region_stats.h new file mode 100644 index 00000000..a8860dc8 --- /dev/null +++ b/src/ipa/rpi/controller/region_stats.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022, Raspberry Pi Ltd + * + * region_stats.h - Raspberry Pi region based statistics container + */ +#pragma once + +#include +#include +#include + +#include + +namespace RPiController { + +template +class RegionStats +{ +public: + struct Region { + T val; + uint32_t counted; + uint32_t uncounted; + }; + + RegionStats() + : size_({}), numFloating_(0), default_({}) + { + } + + void init(const libcamera::Size &size, unsigned int numFloating = 0) + { + size_ = size; + numFloating_ = numFloating; + regions_.clear(); + regions_.resize(size_.width * size_.height + numFloating_); + } + + void init(unsigned int num) + { + size_ = libcamera::Size(num, 1); + numFloating_ = 0; + regions_.clear(); + regions_.resize(num); + } + + unsigned int numRegions() const + { + return size_.width * size_.height; + } + + unsigned int numFloatingRegions() const + { + return numFloating_; + } + + libcamera::Size size() const + { + return size_; + } + + void set(unsigned int index, const Region ®ion) + { + if (index >= numRegions()) + return; + set_(index, region); + } + + void set(const libcamera::Point &pos, const Region ®ion) + { + set(pos.y * size_.width + pos.x, region); + } + + void setFloating(unsigned int index, const Region ®ion) + { + if (index >= numFloatingRegions()) + return; + set(numRegions() + index, region); + } + + const Region &get(unsigned int index) const + { + if (index >= numRegions()) + return default_; + return get_(index); + } + + const Region &get(const libcamera::Point &pos) const + { + return get(pos.y * size_.width + pos.x); + } + + const Region &getFloating(unsigned int index) const + { + if (index >= numFloatingRegions()) + return default_; + return get_(numRegions() + index); + } + + typename std::vector::iterator begin() { return regions_.begin(); } + typename std::vector::iterator end() { return regions_.end(); } + typename std::vector::const_iterator begin() const { return regions_.begin(); } + typename std::vector::const_iterator end() const { return regions_.end(); } + +private: + void set_(unsigned int index, const Region ®ion) + { + regions_[index] = region; + } + + const Region &get_(unsigned int index) const + { + return regions_[index]; + } + + libcamera::Size size_; + unsigned int numFloating_; + std::vector regions_; + Region default_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/af.cpp b/src/ipa/rpi/controller/rpi/af.cpp new file mode 100644 index 00000000..ed0c8a94 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/af.cpp @@ -0,0 +1,797 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022-2023, Raspberry Pi Ltd + * + * af.cpp - Autofocus control algorithm + */ + +#include "af.h" + +#include +#include +#include + +#include + +#include + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiAf) + +#define NAME "rpi.af" + +/* + * Default values for parameters. All may be overridden in the tuning file. + * Many of these values are sensor- or module-dependent; the defaults here + * assume IMX708 in a Raspberry Pi V3 camera with the standard lens. + * + * Here all focus values are in dioptres (1/m). They are converted to hardware + * units when written to status.lensSetting or returned from setLensPosition(). + * + * Gain and delay values are relative to the update rate, since much (not all) + * of the delay is in the sensor and (for CDAF) ISP, not the lens mechanism; + * but note that algorithms are updated at no more than 30 Hz. + */ + +Af::RangeDependentParams::RangeDependentParams() + : focusMin(0.0), + focusMax(12.0), + focusDefault(1.0) +{ +} + +Af::SpeedDependentParams::SpeedDependentParams() + : stepCoarse(1.0), + stepFine(0.25), + contrastRatio(0.75), + pdafGain(-0.02), + pdafSquelch(0.125), + maxSlew(2.0), + pdafFrames(20), + dropoutFrames(6), + stepFrames(4) +{ +} + +Af::CfgParams::CfgParams() + : confEpsilon(8), + confThresh(16), + confClip(512), + skipFrames(5), + map() +{ +} + +template +static void readNumber(T &dest, const libcamera::YamlObject ¶ms, char const *name) +{ + auto value = params[name].get(); + if (value) + dest = *value; + else + LOG(RPiAf, Warning) << "Missing parameter \"" << name << "\""; +} + +void Af::RangeDependentParams::read(const libcamera::YamlObject ¶ms) +{ + + readNumber(focusMin, params, "min"); + readNumber(focusMax, params, "max"); + readNumber(focusDefault, params, "default"); +} + +void Af::SpeedDependentParams::read(const libcamera::YamlObject ¶ms) +{ + readNumber(stepCoarse, params, "step_coarse"); + readNumber(stepFine, params, "step_fine"); + readNumber(contrastRatio, params, "contrast_ratio"); + readNumber(pdafGain, params, "pdaf_gain"); + readNumber(pdafSquelch, params, "pdaf_squelch"); + readNumber(maxSlew, params, "max_slew"); + readNumber(pdafFrames, params, "pdaf_frames"); + readNumber(dropoutFrames, params, "dropout_frames"); + readNumber(stepFrames, params, "step_frames"); +} + +int Af::CfgParams::read(const libcamera::YamlObject ¶ms) +{ + if (params.contains("ranges")) { + auto &rr = params["ranges"]; + + if (rr.contains("normal")) + ranges[AfRangeNormal].read(rr["normal"]); + else + LOG(RPiAf, Warning) << "Missing range \"normal\""; + + ranges[AfRangeMacro] = ranges[AfRangeNormal]; + if (rr.contains("macro")) + ranges[AfRangeMacro].read(rr["macro"]); + + ranges[AfRangeFull].focusMin = std::min(ranges[AfRangeNormal].focusMin, + ranges[AfRangeMacro].focusMin); + ranges[AfRangeFull].focusMax = std::max(ranges[AfRangeNormal].focusMax, + ranges[AfRangeMacro].focusMax); + ranges[AfRangeFull].focusDefault = ranges[AfRangeNormal].focusDefault; + if (rr.contains("full")) + ranges[AfRangeFull].read(rr["full"]); + } else + LOG(RPiAf, Warning) << "No ranges defined"; + + if (params.contains("speeds")) { + auto &ss = params["speeds"]; + + if (ss.contains("normal")) + speeds[AfSpeedNormal].read(ss["normal"]); + else + LOG(RPiAf, Warning) << "Missing speed \"normal\""; + + speeds[AfSpeedFast] = speeds[AfSpeedNormal]; + if (ss.contains("fast")) + speeds[AfSpeedFast].read(ss["fast"]); + } else + LOG(RPiAf, Warning) << "No speeds defined"; + + readNumber(confEpsilon, params, "conf_epsilon"); + readNumber(confThresh, params, "conf_thresh"); + readNumber(confClip, params, "conf_clip"); + readNumber(skipFrames, params, "skip_frames"); + + if (params.contains("map")) + map.read(params["map"]); + else + LOG(RPiAf, Warning) << "No map defined"; + + return 0; +} + +void Af::CfgParams::initialise() +{ + if (map.empty()) { + /* Default mapping from dioptres to hardware setting */ + static constexpr double DefaultMapX0 = 0.0; + static constexpr double DefaultMapY0 = 445.0; + static constexpr double DefaultMapX1 = 15.0; + static constexpr double DefaultMapY1 = 925.0; + + map.append(DefaultMapX0, DefaultMapY0); + map.append(DefaultMapX1, DefaultMapY1); + } +} + +/* Af Algorithm class */ + +static constexpr unsigned MaxWindows = 10; + +Af::Af(Controller *controller) + : AfAlgorithm(controller), + cfg_(), + range_(AfRangeNormal), + speed_(AfSpeedNormal), + mode_(AfAlgorithm::AfModeManual), + pauseFlag_(false), + statsRegion_(0, 0, 0, 0), + windows_(), + useWindows_(false), + phaseWeights_(), + contrastWeights_(), + scanState_(ScanState::Idle), + initted_(false), + ftarget_(-1.0), + fsmooth_(-1.0), + prevContrast_(0.0), + skipCount_(0), + stepCount_(0), + dropCount_(0), + scanMaxContrast_(0.0), + scanMinContrast_(1.0e9), + scanData_(), + reportState_(AfState::Idle) +{ + /* + * Reserve space for data, to reduce memory fragmentation. It's too early + * to query the size of the PDAF (from camera) and Contrast (from ISP) + * statistics, but these are plausible upper bounds. + */ + phaseWeights_.w.reserve(16 * 12); + contrastWeights_.w.reserve(getHardwareConfig().focusRegions.width * + getHardwareConfig().focusRegions.height); + scanData_.reserve(32); +} + +Af::~Af() +{ +} + +char const *Af::name() const +{ + return NAME; +} + +int Af::read(const libcamera::YamlObject ¶ms) +{ + return cfg_.read(params); +} + +void Af::initialise() +{ + cfg_.initialise(); +} + +void Af::switchMode(CameraMode const &cameraMode, [[maybe_unused]] Metadata *metadata) +{ + (void)metadata; + + /* Assume that PDAF and Focus stats grids cover the visible area */ + statsRegion_.x = (int)cameraMode.cropX; + statsRegion_.y = (int)cameraMode.cropY; + statsRegion_.width = (unsigned)(cameraMode.width * cameraMode.scaleX); + statsRegion_.height = (unsigned)(cameraMode.height * cameraMode.scaleY); + LOG(RPiAf, Debug) << "switchMode: statsRegion: " + << statsRegion_.x << ',' + << statsRegion_.y << ',' + << statsRegion_.width << ',' + << statsRegion_.height; + invalidateWeights(); + + if (scanState_ >= ScanState::Coarse && scanState_ < ScanState::Settle) { + /* + * If a scan was in progress, re-start it, as CDAF statistics + * may have changed. Though if the application is just about + * to take a still picture, this will not help... + */ + startProgrammedScan(); + } + skipCount_ = cfg_.skipFrames; +} + +void Af::computeWeights(RegionWeights *wgts, unsigned rows, unsigned cols) +{ + wgts->rows = rows; + wgts->cols = cols; + wgts->sum = 0; + wgts->w.resize(rows * cols); + std::fill(wgts->w.begin(), wgts->w.end(), 0); + + if (rows > 0 && cols > 0 && useWindows_ && + statsRegion_.height >= rows && statsRegion_.width >= cols) { + /* + * Here we just merge all of the given windows, weighted by area. + * \todo Perhaps a better approach might be to find the phase in each + * window and choose either the closest or the highest-confidence one? + * Ensure weights sum to less than (1<<16). 46080 is a "round number" + * below 65536, for better rounding when window size is a simple + * fraction of image dimensions. + */ + const unsigned maxCellWeight = 46080u / (MaxWindows * rows * cols); + const unsigned cellH = statsRegion_.height / rows; + const unsigned cellW = statsRegion_.width / cols; + const unsigned cellA = cellH * cellW; + + for (auto &w : windows_) { + for (unsigned r = 0; r < rows; ++r) { + int y0 = std::max(statsRegion_.y + (int)(cellH * r), w.y); + int y1 = std::min(statsRegion_.y + (int)(cellH * (r + 1)), + w.y + (int)(w.height)); + if (y0 >= y1) + continue; + y1 -= y0; + for (unsigned c = 0; c < cols; ++c) { + int x0 = std::max(statsRegion_.x + (int)(cellW * c), w.x); + int x1 = std::min(statsRegion_.x + (int)(cellW * (c + 1)), + w.x + (int)(w.width)); + if (x0 >= x1) + continue; + unsigned a = y1 * (x1 - x0); + a = (maxCellWeight * a + cellA - 1) / cellA; + wgts->w[r * cols + c] += a; + wgts->sum += a; + } + } + } + } + + if (wgts->sum == 0) { + /* Default AF window is the middle 1/2 width of the middle 1/3 height */ + for (unsigned r = rows / 3; r < rows - rows / 3; ++r) { + for (unsigned c = cols / 4; c < cols - cols / 4; ++c) { + wgts->w[r * cols + c] = 1; + wgts->sum += 1; + } + } + } +} + +void Af::invalidateWeights() +{ + phaseWeights_.sum = 0; + contrastWeights_.sum = 0; +} + +bool Af::getPhase(PdafRegions const ®ions, double &phase, double &conf) +{ + libcamera::Size size = regions.size(); + if (size.height != phaseWeights_.rows || size.width != phaseWeights_.cols || + phaseWeights_.sum == 0) { + LOG(RPiAf, Debug) << "Recompute Phase weights " << size.width << 'x' << size.height; + computeWeights(&phaseWeights_, size.height, size.width); + } + + uint32_t sumWc = 0; + int64_t sumWcp = 0; + for (unsigned i = 0; i < regions.numRegions(); ++i) { + unsigned w = phaseWeights_.w[i]; + if (w) { + const PdafData &data = regions.get(i).val; + unsigned c = data.conf; + if (c >= cfg_.confThresh) { + if (c > cfg_.confClip) + c = cfg_.confClip; + c -= (cfg_.confThresh >> 2); + sumWc += w * c; + c -= (cfg_.confThresh >> 2); + sumWcp += (int64_t)(w * c) * (int64_t)data.phase; + } + } + } + + if (0 < phaseWeights_.sum && phaseWeights_.sum <= sumWc) { + phase = (double)sumWcp / (double)sumWc; + conf = (double)sumWc / (double)phaseWeights_.sum; + return true; + } else { + phase = 0.0; + conf = 0.0; + return false; + } +} + +double Af::getContrast(const FocusRegions &focusStats) +{ + libcamera::Size size = focusStats.size(); + if (size.height != contrastWeights_.rows || + size.width != contrastWeights_.cols || contrastWeights_.sum == 0) { + LOG(RPiAf, Debug) << "Recompute Contrast weights " + << size.width << 'x' << size.height; + computeWeights(&contrastWeights_, size.height, size.width); + } + + uint64_t sumWc = 0; + for (unsigned i = 0; i < focusStats.numRegions(); ++i) + sumWc += contrastWeights_.w[i] * focusStats.get(i).val; + + return (contrastWeights_.sum > 0) ? ((double)sumWc / (double)contrastWeights_.sum) : 0.0; +} + +void Af::doPDAF(double phase, double conf) +{ + /* Apply loop gain */ + phase *= cfg_.speeds[speed_].pdafGain; + + if (mode_ == AfModeContinuous) { + /* + * PDAF in Continuous mode. Scale down lens movement when + * delta is small or confidence is low, to suppress wobble. + */ + phase *= conf / (conf + cfg_.confEpsilon); + if (std::abs(phase) < cfg_.speeds[speed_].pdafSquelch) { + double a = phase / cfg_.speeds[speed_].pdafSquelch; + phase *= a * a; + } + } else { + /* + * PDAF in triggered-auto mode. Allow early termination when + * phase delta is small; scale down lens movements towards + * the end of the sequence, to ensure a stable image. + */ + if (stepCount_ >= cfg_.speeds[speed_].stepFrames) { + if (std::abs(phase) < cfg_.speeds[speed_].pdafSquelch) + stepCount_ = cfg_.speeds[speed_].stepFrames; + } else + phase *= stepCount_ / cfg_.speeds[speed_].stepFrames; + } + + /* Apply slew rate limit. Report failure if out of bounds. */ + if (phase < -cfg_.speeds[speed_].maxSlew) { + phase = -cfg_.speeds[speed_].maxSlew; + reportState_ = (ftarget_ <= cfg_.ranges[range_].focusMin) ? AfState::Failed + : AfState::Scanning; + } else if (phase > cfg_.speeds[speed_].maxSlew) { + phase = cfg_.speeds[speed_].maxSlew; + reportState_ = (ftarget_ >= cfg_.ranges[range_].focusMax) ? AfState::Failed + : AfState::Scanning; + } else + reportState_ = AfState::Focused; + + ftarget_ = fsmooth_ + phase; +} + +bool Af::earlyTerminationByPhase(double phase) +{ + if (scanData_.size() > 0 && + scanData_[scanData_.size() - 1].conf >= cfg_.confEpsilon) { + double oldFocus = scanData_[scanData_.size() - 1].focus; + double oldPhase = scanData_[scanData_.size() - 1].phase; + + /* + * Check that the gradient is finite and has the expected sign; + * Interpolate/extrapolate the lens position for zero phase. + * Check that the extrapolation is well-conditioned. + */ + if ((ftarget_ - oldFocus) * (phase - oldPhase) > 0.0) { + double param = phase / (phase - oldPhase); + if (-3.0 <= param && param <= 3.5) { + ftarget_ += param * (oldFocus - ftarget_); + LOG(RPiAf, Debug) << "ETBP: param=" << param; + return true; + } + } + } + + return false; +} + +double Af::findPeak(unsigned i) const +{ + double f = scanData_[i].focus; + + if (i > 0 && i + 1 < scanData_.size()) { + double dropLo = scanData_[i].contrast - scanData_[i - 1].contrast; + double dropHi = scanData_[i].contrast - scanData_[i + 1].contrast; + if (0.0 <= dropLo && dropLo < dropHi) { + double param = 0.3125 * (1.0 - dropLo / dropHi) * (1.6 - dropLo / dropHi); + f += param * (scanData_[i - 1].focus - f); + } else if (0.0 <= dropHi && dropHi < dropLo) { + double param = 0.3125 * (1.0 - dropHi / dropLo) * (1.6 - dropHi / dropLo); + f += param * (scanData_[i + 1].focus - f); + } + } + + LOG(RPiAf, Debug) << "FindPeak: " << f; + return f; +} + +void Af::doScan(double contrast, double phase, double conf) +{ + /* Record lens position, contrast and phase values for the current scan */ + if (scanData_.empty() || contrast > scanMaxContrast_) { + scanMaxContrast_ = contrast; + scanMaxIndex_ = scanData_.size(); + } + if (contrast < scanMinContrast_) + scanMinContrast_ = contrast; + scanData_.emplace_back(ScanRecord{ ftarget_, contrast, phase, conf }); + + if (scanState_ == ScanState::Coarse) { + if (ftarget_ >= cfg_.ranges[range_].focusMax || + contrast < cfg_.speeds[speed_].contrastRatio * scanMaxContrast_) { + /* + * Finished course scan, or termination based on contrast. + * Jump to just after max contrast and start fine scan. + */ + ftarget_ = std::min(ftarget_, findPeak(scanMaxIndex_) + + 2.0 * cfg_.speeds[speed_].stepFine); + scanState_ = ScanState::Fine; + scanData_.clear(); + } else + ftarget_ += cfg_.speeds[speed_].stepCoarse; + } else { /* ScanState::Fine */ + if (ftarget_ <= cfg_.ranges[range_].focusMin || scanData_.size() >= 5 || + contrast < cfg_.speeds[speed_].contrastRatio * scanMaxContrast_) { + /* + * Finished fine scan, or termination based on contrast. + * Use quadratic peak-finding to find best contrast position. + */ + ftarget_ = findPeak(scanMaxIndex_); + scanState_ = ScanState::Settle; + } else + ftarget_ -= cfg_.speeds[speed_].stepFine; + } + + stepCount_ = (ftarget_ == fsmooth_) ? 0 : cfg_.speeds[speed_].stepFrames; +} + +void Af::doAF(double contrast, double phase, double conf) +{ + /* Skip frames at startup and after sensor mode change */ + if (skipCount_ > 0) { + LOG(RPiAf, Debug) << "SKIP"; + skipCount_--; + return; + } + + if (scanState_ == ScanState::Pdaf) { + /* + * Use PDAF closed-loop control whenever available, in both CAF + * mode and (for a limited number of iterations) when triggered. + * If PDAF fails (due to poor contrast, noise or large defocus), + * fall back to a CDAF-based scan. To avoid "nuisance" scans, + * scan only after a number of frames with low PDAF confidence. + */ + if (conf > (dropCount_ ? 1.0 : 0.25) * cfg_.confEpsilon) { + doPDAF(phase, conf); + if (stepCount_ > 0) + stepCount_--; + else if (mode_ != AfModeContinuous) + scanState_ = ScanState::Idle; + dropCount_ = 0; + } else if (++dropCount_ == cfg_.speeds[speed_].dropoutFrames) + startProgrammedScan(); + } else if (scanState_ >= ScanState::Coarse && fsmooth_ == ftarget_) { + /* + * Scanning sequence. This means PDAF has become unavailable. + * Allow a delay between steps for CDAF FoM statistics to be + * updated, and a "settling time" at the end of the sequence. + * [A coarse or fine scan can be abandoned if two PDAF samples + * allow direct interpolation of the zero-phase lens position.] + */ + if (stepCount_ > 0) + stepCount_--; + else if (scanState_ == ScanState::Settle) { + if (prevContrast_ >= cfg_.speeds[speed_].contrastRatio * scanMaxContrast_ && + scanMinContrast_ <= cfg_.speeds[speed_].contrastRatio * scanMaxContrast_) + reportState_ = AfState::Focused; + else + reportState_ = AfState::Failed; + if (mode_ == AfModeContinuous && !pauseFlag_ && + cfg_.speeds[speed_].dropoutFrames > 0) + scanState_ = ScanState::Pdaf; + else + scanState_ = ScanState::Idle; + scanData_.clear(); + } else if (conf >= cfg_.confEpsilon && earlyTerminationByPhase(phase)) { + scanState_ = ScanState::Settle; + stepCount_ = (mode_ == AfModeContinuous) ? 0 + : cfg_.speeds[speed_].stepFrames; + } else + doScan(contrast, phase, conf); + } +} + +void Af::updateLensPosition() +{ + if (scanState_ >= ScanState::Pdaf) { + ftarget_ = std::clamp(ftarget_, + cfg_.ranges[range_].focusMin, + cfg_.ranges[range_].focusMax); + } + + if (initted_) { + /* from a known lens position: apply slew rate limit */ + fsmooth_ = std::clamp(ftarget_, + fsmooth_ - cfg_.speeds[speed_].maxSlew, + fsmooth_ + cfg_.speeds[speed_].maxSlew); + } else { + /* from an unknown position: go straight to target, but add delay */ + fsmooth_ = ftarget_; + initted_ = true; + skipCount_ = cfg_.skipFrames; + } +} + +void Af::startAF() +{ + /* Use PDAF if the tuning file allows it; else CDAF. */ + if (cfg_.speeds[speed_].dropoutFrames > 0 && + (mode_ == AfModeContinuous || cfg_.speeds[speed_].pdafFrames > 0)) { + if (!initted_) { + ftarget_ = cfg_.ranges[range_].focusDefault; + updateLensPosition(); + } + stepCount_ = (mode_ == AfModeContinuous) ? 0 : cfg_.speeds[speed_].pdafFrames; + scanState_ = ScanState::Pdaf; + scanData_.clear(); + dropCount_ = 0; + reportState_ = AfState::Scanning; + } else + startProgrammedScan(); +} + +void Af::startProgrammedScan() +{ + ftarget_ = cfg_.ranges[range_].focusMin; + updateLensPosition(); + scanState_ = ScanState::Coarse; + scanMaxContrast_ = 0.0; + scanMinContrast_ = 1.0e9; + scanMaxIndex_ = 0; + scanData_.clear(); + stepCount_ = cfg_.speeds[speed_].stepFrames; + reportState_ = AfState::Scanning; +} + +void Af::goIdle() +{ + scanState_ = ScanState::Idle; + reportState_ = AfState::Idle; + scanData_.clear(); +} + +/* + * PDAF phase data are available in prepare(), but CDAF statistics are not + * available until process(). We are gambling on the availability of PDAF. + * To expedite feedback control using PDAF, issue the V4L2 lens control from + * prepare(). Conversely, during scans, we must allow an extra frame delay + * between steps, to retrieve CDAF statistics from the previous process() + * so we can terminate the scan early without having to change our minds. + */ + +void Af::prepare(Metadata *imageMetadata) +{ + /* Initialize for triggered scan or start of CAF mode */ + if (scanState_ == ScanState::Trigger) + startAF(); + + if (initted_) { + /* Get PDAF from the embedded metadata, and run AF algorithm core */ + PdafRegions regions; + double phase = 0.0, conf = 0.0; + double oldFt = ftarget_; + double oldFs = fsmooth_; + ScanState oldSs = scanState_; + uint32_t oldSt = stepCount_; + if (imageMetadata->get("pdaf.regions", regions) == 0) + getPhase(regions, phase, conf); + doAF(prevContrast_, phase, conf); + updateLensPosition(); + LOG(RPiAf, Debug) << std::fixed << std::setprecision(2) + << static_cast(reportState_) + << " sst" << static_cast(oldSs) + << "->" << static_cast(scanState_) + << " stp" << oldSt << "->" << stepCount_ + << " ft" << oldFt << "->" << ftarget_ + << " fs" << oldFs << "->" << fsmooth_ + << " cont=" << (int)prevContrast_ + << " phase=" << (int)phase << " conf=" << (int)conf; + } + + /* Report status and produce new lens setting */ + AfStatus status; + if (pauseFlag_) + status.pauseState = (scanState_ == ScanState::Idle) ? AfPauseState::Paused + : AfPauseState::Pausing; + else + status.pauseState = AfPauseState::Running; + + if (mode_ == AfModeAuto && scanState_ != ScanState::Idle) + status.state = AfState::Scanning; + else + status.state = reportState_; + status.lensSetting = initted_ ? std::optional(cfg_.map.eval(fsmooth_)) + : std::nullopt; + imageMetadata->set("af.status", status); +} + +void Af::process(StatisticsPtr &stats, [[maybe_unused]] Metadata *imageMetadata) +{ + (void)imageMetadata; + prevContrast_ = getContrast(stats->focusRegions); +} + +/* Controls */ + +void Af::setRange(AfRange r) +{ + LOG(RPiAf, Debug) << "setRange: " << (unsigned)r; + if (r < AfAlgorithm::AfRangeMax) + range_ = r; +} + +void Af::setSpeed(AfSpeed s) +{ + LOG(RPiAf, Debug) << "setSpeed: " << (unsigned)s; + if (s < AfAlgorithm::AfSpeedMax) { + if (scanState_ == ScanState::Pdaf && + cfg_.speeds[s].pdafFrames > cfg_.speeds[speed_].pdafFrames) + stepCount_ += cfg_.speeds[s].pdafFrames - cfg_.speeds[speed_].pdafFrames; + speed_ = s; + } +} + +void Af::setMetering(bool mode) +{ + if (useWindows_ != mode) { + useWindows_ = mode; + invalidateWeights(); + } +} + +void Af::setWindows(libcamera::Span const &wins) +{ + windows_.clear(); + for (auto &w : wins) { + LOG(RPiAf, Debug) << "Window: " + << w.x << ", " + << w.y << ", " + << w.width << ", " + << w.height; + windows_.push_back(w); + if (windows_.size() >= MaxWindows) + break; + } + + if (useWindows_) + invalidateWeights(); +} + +bool Af::setLensPosition(double dioptres, int *hwpos) +{ + bool changed = false; + + if (mode_ == AfModeManual) { + LOG(RPiAf, Debug) << "setLensPosition: " << dioptres; + ftarget_ = cfg_.map.domain().clip(dioptres); + changed = !(initted_ && fsmooth_ == ftarget_); + updateLensPosition(); + } + + if (hwpos) + *hwpos = cfg_.map.eval(fsmooth_); + + return changed; +} + +std::optional Af::getLensPosition() const +{ + /* + * \todo We ought to perform some precise timing here to determine + * the current lens position. + */ + return initted_ ? std::optional(fsmooth_) : std::nullopt; +} + +void Af::cancelScan() +{ + LOG(RPiAf, Debug) << "cancelScan"; + if (mode_ == AfModeAuto) + goIdle(); +} + +void Af::triggerScan() +{ + LOG(RPiAf, Debug) << "triggerScan"; + if (mode_ == AfModeAuto && scanState_ == ScanState::Idle) + scanState_ = ScanState::Trigger; +} + +void Af::setMode(AfAlgorithm::AfMode mode) +{ + LOG(RPiAf, Debug) << "setMode: " << (unsigned)mode; + if (mode_ != mode) { + mode_ = mode; + pauseFlag_ = false; + if (mode == AfModeContinuous) + scanState_ = ScanState::Trigger; + else if (mode != AfModeAuto || scanState_ < ScanState::Coarse) + goIdle(); + } +} + +AfAlgorithm::AfMode Af::getMode() const +{ + return mode_; +} + +void Af::pause(AfAlgorithm::AfPause pause) +{ + LOG(RPiAf, Debug) << "pause: " << (unsigned)pause; + if (mode_ == AfModeContinuous) { + if (pause == AfPauseResume && pauseFlag_) { + pauseFlag_ = false; + if (scanState_ < ScanState::Coarse) + scanState_ = ScanState::Trigger; + } else if (pause != AfPauseResume && !pauseFlag_) { + pauseFlag_ = true; + if (pause == AfPauseImmediate || scanState_ < ScanState::Coarse) + goIdle(); + } + } +} + +// Register algorithm with the system. +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Af(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/af.h b/src/ipa/rpi/controller/rpi/af.h new file mode 100644 index 00000000..6d2bae67 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/af.h @@ -0,0 +1,165 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022-2023, Raspberry Pi Ltd + * + * af.h - Autofocus control algorithm + */ +#pragma once + +#include "../af_algorithm.h" +#include "../af_status.h" +#include "../pdaf_data.h" +#include "../pwl.h" + +/* + * This algorithm implements a hybrid of CDAF and PDAF, favouring PDAF. + * + * Whenever PDAF is available, it is used in a continuous feedback loop. + * When triggered in auto mode, we simply enable AF for a limited number + * of frames (it may terminate early if the delta becomes small enough). + * + * When PDAF confidence is low (due e.g. to low contrast or extreme defocus) + * or PDAF data are absent, fall back to CDAF with a programmed scan pattern. + * A coarse and fine scan are performed, using ISP's CDAF focus FoM to + * estimate the lens position with peak contrast. This is slower due to + * extra latency in the ISP, and requires a settling time between steps. + * + * Some hysteresis is applied to the switch between PDAF and CDAF, to avoid + * "nuisance" scans. During each interval where PDAF is not working, only + * ONE scan will be performed; CAF cannot track objects using CDAF alone. + * + */ + +namespace RPiController { + +class Af : public AfAlgorithm +{ +public: + Af(Controller *controller = NULL); + ~Af(); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void initialise() override; + + /* IPA calls */ + void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; + void prepare(Metadata *imageMetadata) override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; + + /* controls */ + void setRange(AfRange range) override; + void setSpeed(AfSpeed speed) override; + void setMetering(bool use_windows) override; + void setWindows(libcamera::Span const &wins) override; + void setMode(AfMode mode) override; + AfMode getMode() const override; + bool setLensPosition(double dioptres, int32_t *hwpos) override; + std::optional getLensPosition() const override; + void triggerScan() override; + void cancelScan() override; + void pause(AfPause pause) override; + +private: + enum class ScanState { + Idle = 0, + Trigger, + Pdaf, + Coarse, + Fine, + Settle + }; + + struct RangeDependentParams { + double focusMin; /* lower (far) limit in dipotres */ + double focusMax; /* upper (near) limit in dioptres */ + double focusDefault; /* default setting ("hyperfocal") */ + + RangeDependentParams(); + void read(const libcamera::YamlObject ¶ms); + }; + + struct SpeedDependentParams { + double stepCoarse; /* used for scans */ + double stepFine; /* used for scans */ + double contrastRatio; /* used for scan termination and reporting */ + double pdafGain; /* coefficient for PDAF feedback loop */ + double pdafSquelch; /* PDAF stability parameter (device-specific) */ + double maxSlew; /* limit for lens movement per frame */ + uint32_t pdafFrames; /* number of iterations when triggered */ + uint32_t dropoutFrames; /* number of non-PDAF frames to switch to CDAF */ + uint32_t stepFrames; /* frames to skip in between steps of a scan */ + + SpeedDependentParams(); + void read(const libcamera::YamlObject ¶ms); + }; + + struct CfgParams { + RangeDependentParams ranges[AfRangeMax]; + SpeedDependentParams speeds[AfSpeedMax]; + uint32_t confEpsilon; /* PDAF hysteresis threshold (sensor-specific) */ + uint32_t confThresh; /* PDAF confidence cell min (sensor-specific) */ + uint32_t confClip; /* PDAF confidence cell max (sensor-specific) */ + uint32_t skipFrames; /* frames to skip at start or modeswitch */ + Pwl map; /* converts dioptres -> lens driver position */ + + CfgParams(); + int read(const libcamera::YamlObject ¶ms); + void initialise(); + }; + + struct ScanRecord { + double focus; + double contrast; + double phase; + double conf; + }; + + struct RegionWeights { + unsigned rows; + unsigned cols; + uint32_t sum; + std::vector w; + + RegionWeights() + : rows(0), cols(0), sum(0), w() {} + }; + + void computeWeights(RegionWeights *wgts, unsigned rows, unsigned cols); + void invalidateWeights(); + bool getPhase(PdafRegions const ®ions, double &phase, double &conf); + double getContrast(const FocusRegions &focusStats); + void doPDAF(double phase, double conf); + bool earlyTerminationByPhase(double phase); + double findPeak(unsigned index) const; + void doScan(double contrast, double phase, double conf); + void doAF(double contrast, double phase, double conf); + void updateLensPosition(); + void startAF(); + void startProgrammedScan(); + void goIdle(); + + /* Configuration and settings */ + CfgParams cfg_; + AfRange range_; + AfSpeed speed_; + AfMode mode_; + bool pauseFlag_; + libcamera::Rectangle statsRegion_; + std::vector windows_; + bool useWindows_; + RegionWeights phaseWeights_; + RegionWeights contrastWeights_; + + /* Working state. */ + ScanState scanState_; + bool initted_; + double ftarget_, fsmooth_; + double prevContrast_; + unsigned skipCount_, stepCount_, dropCount_; + unsigned scanMaxIndex_; + double scanMaxContrast_, scanMinContrast_; + std::vector scanData_; + AfState reportState_; +}; + +} // namespace RPiController diff --git a/src/ipa/rpi/controller/rpi/agc.cpp b/src/ipa/rpi/controller/rpi/agc.cpp new file mode 100644 index 00000000..e6fb7b8d --- /dev/null +++ b/src/ipa/rpi/controller/rpi/agc.cpp @@ -0,0 +1,922 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * agc.cpp - AGC/AEC control algorithm + */ + +#include +#include +#include + +#include + +#include "../awb_status.h" +#include "../device_status.h" +#include "../histogram.h" +#include "../lux_status.h" +#include "../metadata.h" + +#include "agc.h" + +using namespace RPiController; +using namespace libcamera; +using libcamera::utils::Duration; +using namespace std::literals::chrono_literals; + +LOG_DEFINE_CATEGORY(RPiAgc) + +#define NAME "rpi.agc" + +int AgcMeteringMode::read(const libcamera::YamlObject ¶ms) +{ + const YamlObject &yamlWeights = params["weights"]; + + for (const auto &p : yamlWeights.asList()) { + auto value = p.get(); + if (!value) + return -EINVAL; + weights.push_back(*value); + } + + return 0; +} + +static std::tuple +readMeteringModes(std::map &metering_modes, + const libcamera::YamlObject ¶ms) +{ + std::string first; + int ret; + + for (const auto &[key, value] : params.asDict()) { + AgcMeteringMode meteringMode; + ret = meteringMode.read(value); + if (ret) + return { ret, {} }; + + metering_modes[key] = std::move(meteringMode); + if (first.empty()) + first = key; + } + + return { 0, first }; +} + +int AgcExposureMode::read(const libcamera::YamlObject ¶ms) +{ + auto value = params["shutter"].getList(); + if (!value) + return -EINVAL; + std::transform(value->begin(), value->end(), std::back_inserter(shutter), + [](double v) { return v * 1us; }); + + value = params["gain"].getList(); + if (!value) + return -EINVAL; + gain = std::move(*value); + + if (shutter.size() < 2 || gain.size() < 2) { + LOG(RPiAgc, Error) + << "AgcExposureMode: must have at least two entries in exposure profile"; + return -EINVAL; + } + + if (shutter.size() != gain.size()) { + LOG(RPiAgc, Error) + << "AgcExposureMode: expect same number of exposure and gain entries in exposure profile"; + return -EINVAL; + } + + return 0; +} + +static std::tuple +readExposureModes(std::map &exposureModes, + const libcamera::YamlObject ¶ms) +{ + std::string first; + int ret; + + for (const auto &[key, value] : params.asDict()) { + AgcExposureMode exposureMode; + ret = exposureMode.read(value); + if (ret) + return { ret, {} }; + + exposureModes[key] = std::move(exposureMode); + if (first.empty()) + first = key; + } + + return { 0, first }; +} + +int AgcConstraint::read(const libcamera::YamlObject ¶ms) +{ + std::string boundString = params["bound"].get(""); + transform(boundString.begin(), boundString.end(), + boundString.begin(), ::toupper); + if (boundString != "UPPER" && boundString != "LOWER") { + LOG(RPiAgc, Error) << "AGC constraint type should be UPPER or LOWER"; + return -EINVAL; + } + bound = boundString == "UPPER" ? Bound::UPPER : Bound::LOWER; + + auto value = params["q_lo"].get(); + if (!value) + return -EINVAL; + qLo = *value; + + value = params["q_hi"].get(); + if (!value) + return -EINVAL; + qHi = *value; + + return yTarget.read(params["y_target"]); +} + +static std::tuple +readConstraintMode(const libcamera::YamlObject ¶ms) +{ + AgcConstraintMode mode; + int ret; + + for (const auto &p : params.asList()) { + AgcConstraint constraint; + ret = constraint.read(p); + if (ret) + return { ret, {} }; + + mode.push_back(std::move(constraint)); + } + + return { 0, mode }; +} + +static std::tuple +readConstraintModes(std::map &constraintModes, + const libcamera::YamlObject ¶ms) +{ + std::string first; + int ret; + + for (const auto &[key, value] : params.asDict()) { + std::tie(ret, constraintModes[key]) = readConstraintMode(value); + if (ret) + return { ret, {} }; + + if (first.empty()) + first = key; + } + + return { 0, first }; +} + +int AgcConfig::read(const libcamera::YamlObject ¶ms) +{ + LOG(RPiAgc, Debug) << "AgcConfig"; + int ret; + + std::tie(ret, defaultMeteringMode) = + readMeteringModes(meteringModes, params["metering_modes"]); + if (ret) + return ret; + std::tie(ret, defaultExposureMode) = + readExposureModes(exposureModes, params["exposure_modes"]); + if (ret) + return ret; + std::tie(ret, defaultConstraintMode) = + readConstraintModes(constraintModes, params["constraint_modes"]); + if (ret) + return ret; + + ret = yTarget.read(params["y_target"]); + if (ret) + return ret; + + speed = params["speed"].get(0.2); + startupFrames = params["startup_frames"].get(10); + convergenceFrames = params["convergence_frames"].get(6); + fastReduceThreshold = params["fast_reduce_threshold"].get(0.4); + baseEv = params["base_ev"].get(1.0); + + /* Start with quite a low value as ramping up is easier than ramping down. */ + defaultExposureTime = params["default_exposure_time"].get(1000) * 1us; + defaultAnalogueGain = params["default_analogue_gain"].get(1.0); + + return 0; +} + +Agc::ExposureValues::ExposureValues() + : shutter(0s), analogueGain(0), + totalExposure(0s), totalExposureNoDG(0s) +{ +} + +Agc::Agc(Controller *controller) + : AgcAlgorithm(controller), meteringMode_(nullptr), + exposureMode_(nullptr), constraintMode_(nullptr), + frameCount_(0), lockCount_(0), + lastTargetExposure_(0s), ev_(1.0), flickerPeriod_(0s), + maxShutter_(0s), fixedShutter_(0s), fixedAnalogueGain_(0.0) +{ + memset(&awb_, 0, sizeof(awb_)); + /* + * Setting status_.totalExposureValue_ to zero initially tells us + * it's not been calculated yet (i.e. Process hasn't yet run). + */ + memset(&status_, 0, sizeof(status_)); + status_.ev = ev_; +} + +char const *Agc::name() const +{ + return NAME; +} + +int Agc::read(const libcamera::YamlObject ¶ms) +{ + LOG(RPiAgc, Debug) << "Agc"; + + int ret = config_.read(params); + if (ret) + return ret; + + const Size &size = getHardwareConfig().agcZoneWeights; + for (auto const &modes : config_.meteringModes) { + if (modes.second.weights.size() != size.width * size.height) { + LOG(RPiAgc, Error) << "AgcMeteringMode: Incorrect number of weights"; + return -EINVAL; + } + } + + /* + * Set the config's defaults (which are the first ones it read) as our + * current modes, until someone changes them. (they're all known to + * exist at this point) + */ + meteringModeName_ = config_.defaultMeteringMode; + meteringMode_ = &config_.meteringModes[meteringModeName_]; + exposureModeName_ = config_.defaultExposureMode; + exposureMode_ = &config_.exposureModes[exposureModeName_]; + constraintModeName_ = config_.defaultConstraintMode; + constraintMode_ = &config_.constraintModes[constraintModeName_]; + /* Set up the "last shutter/gain" values, in case AGC starts "disabled". */ + status_.shutterTime = config_.defaultExposureTime; + status_.analogueGain = config_.defaultAnalogueGain; + return 0; +} + +void Agc::disableAuto() +{ + fixedShutter_ = status_.shutterTime; + fixedAnalogueGain_ = status_.analogueGain; +} + +void Agc::enableAuto() +{ + fixedShutter_ = 0s; + fixedAnalogueGain_ = 0; +} + +unsigned int Agc::getConvergenceFrames() const +{ + /* + * If shutter and gain have been explicitly set, there is no + * convergence to happen, so no need to drop any frames - return zero. + */ + if (fixedShutter_ && fixedAnalogueGain_) + return 0; + else + return config_.convergenceFrames; +} + +void Agc::setEv(double ev) +{ + ev_ = ev; +} + +void Agc::setFlickerPeriod(Duration flickerPeriod) +{ + flickerPeriod_ = flickerPeriod; +} + +void Agc::setMaxShutter(Duration maxShutter) +{ + maxShutter_ = maxShutter; +} + +void Agc::setFixedShutter(Duration fixedShutter) +{ + fixedShutter_ = fixedShutter; + /* Set this in case someone calls disableAuto() straight after. */ + status_.shutterTime = limitShutter(fixedShutter_); +} + +void Agc::setFixedAnalogueGain(double fixedAnalogueGain) +{ + fixedAnalogueGain_ = fixedAnalogueGain; + /* Set this in case someone calls disableAuto() straight after. */ + status_.analogueGain = limitGain(fixedAnalogueGain); +} + +void Agc::setMeteringMode(std::string const &meteringModeName) +{ + meteringModeName_ = meteringModeName; +} + +void Agc::setExposureMode(std::string const &exposureModeName) +{ + exposureModeName_ = exposureModeName; +} + +void Agc::setConstraintMode(std::string const &constraintModeName) +{ + constraintModeName_ = constraintModeName; +} + +void Agc::switchMode(CameraMode const &cameraMode, + Metadata *metadata) +{ + /* AGC expects the mode sensitivity always to be non-zero. */ + ASSERT(cameraMode.sensitivity); + + housekeepConfig(); + + /* + * Store the mode in the local state. We must cache the sensitivity of + * of the previous mode for the calculations below. + */ + double lastSensitivity = mode_.sensitivity; + mode_ = cameraMode; + + Duration fixedShutter = limitShutter(fixedShutter_); + if (fixedShutter && fixedAnalogueGain_) { + /* We're going to reset the algorithm here with these fixed values. */ + + fetchAwbStatus(metadata); + double minColourGain = std::min({ awb_.gainR, awb_.gainG, awb_.gainB, 1.0 }); + ASSERT(minColourGain != 0.0); + + /* This is the equivalent of computeTargetExposure and applyDigitalGain. */ + target_.totalExposureNoDG = fixedShutter_ * fixedAnalogueGain_; + target_.totalExposure = target_.totalExposureNoDG / minColourGain; + + /* Equivalent of filterExposure. This resets any "history". */ + filtered_ = target_; + + /* Equivalent of divideUpExposure. */ + filtered_.shutter = fixedShutter; + filtered_.analogueGain = fixedAnalogueGain_; + } else if (status_.totalExposureValue) { + /* + * On a mode switch, various things could happen: + * - the exposure profile might change + * - a fixed exposure or gain might be set + * - the new mode's sensitivity might be different + * We cope with the last of these by scaling the target values. After + * that we just need to re-divide the exposure/gain according to the + * current exposure profile, which takes care of everything else. + */ + + double ratio = lastSensitivity / cameraMode.sensitivity; + target_.totalExposureNoDG *= ratio; + target_.totalExposure *= ratio; + filtered_.totalExposureNoDG *= ratio; + filtered_.totalExposure *= ratio; + + divideUpExposure(); + } else { + /* + * We come through here on startup, when at least one of the shutter + * or gain has not been fixed. We must still write those values out so + * that they will be applied immediately. We supply some arbitrary defaults + * for any that weren't set. + */ + + /* Equivalent of divideUpExposure. */ + filtered_.shutter = fixedShutter ? fixedShutter : config_.defaultExposureTime; + filtered_.analogueGain = fixedAnalogueGain_ ? fixedAnalogueGain_ : config_.defaultAnalogueGain; + } + + writeAndFinish(metadata, false); +} + +void Agc::prepare(Metadata *imageMetadata) +{ + Duration totalExposureValue = status_.totalExposureValue; + AgcStatus delayedStatus; + + if (!imageMetadata->get("agc.delayed_status", delayedStatus)) + totalExposureValue = delayedStatus.totalExposureValue; + + status_.digitalGain = 1.0; + fetchAwbStatus(imageMetadata); /* always fetch it so that Process knows it's been done */ + + if (status_.totalExposureValue) { + /* Process has run, so we have meaningful values. */ + DeviceStatus deviceStatus; + if (imageMetadata->get("device.status", deviceStatus) == 0) { + Duration actualExposure = deviceStatus.shutterSpeed * + deviceStatus.analogueGain; + if (actualExposure) { + status_.digitalGain = totalExposureValue / actualExposure; + LOG(RPiAgc, Debug) << "Want total exposure " << totalExposureValue; + /* + * Never ask for a gain < 1.0, and also impose + * some upper limit. Make it customisable? + */ + status_.digitalGain = std::max(1.0, std::min(status_.digitalGain, 4.0)); + LOG(RPiAgc, Debug) << "Actual exposure " << actualExposure; + LOG(RPiAgc, Debug) << "Use digitalGain " << status_.digitalGain; + LOG(RPiAgc, Debug) << "Effective exposure " + << actualExposure * status_.digitalGain; + /* Decide whether AEC/AGC has converged. */ + updateLockStatus(deviceStatus); + } + } else + LOG(RPiAgc, Warning) << name() << ": no device metadata"; + imageMetadata->set("agc.status", status_); + } +} + +void Agc::process(StatisticsPtr &stats, Metadata *imageMetadata) +{ + frameCount_++; + /* + * First a little bit of housekeeping, fetching up-to-date settings and + * configuration, that kind of thing. + */ + housekeepConfig(); + /* Get the current exposure values for the frame that's just arrived. */ + fetchCurrentExposure(imageMetadata); + /* Compute the total gain we require relative to the current exposure. */ + double gain, targetY; + computeGain(stats, imageMetadata, gain, targetY); + /* Now compute the target (final) exposure which we think we want. */ + computeTargetExposure(gain); + /* + * Some of the exposure has to be applied as digital gain, so work out + * what that is. This function also tells us whether it's decided to + * "desaturate" the image more quickly. + */ + bool desaturate = applyDigitalGain(gain, targetY); + /* The results have to be filtered so as not to change too rapidly. */ + filterExposure(desaturate); + /* + * The last thing is to divide up the exposure value into a shutter time + * and analogue gain, according to the current exposure mode. + */ + divideUpExposure(); + /* Finally advertise what we've done. */ + writeAndFinish(imageMetadata, desaturate); +} + +void Agc::updateLockStatus(DeviceStatus const &deviceStatus) +{ + const double errorFactor = 0.10; /* make these customisable? */ + const int maxLockCount = 5; + /* Reset "lock count" when we exceed this multiple of errorFactor */ + const double resetMargin = 1.5; + + /* Add 200us to the exposure time error to allow for line quantisation. */ + Duration exposureError = lastDeviceStatus_.shutterSpeed * errorFactor + 200us; + double gainError = lastDeviceStatus_.analogueGain * errorFactor; + Duration targetError = lastTargetExposure_ * errorFactor; + + /* + * Note that we don't know the exposure/gain limits of the sensor, so + * the values we keep requesting may be unachievable. For this reason + * we only insist that we're close to values in the past few frames. + */ + if (deviceStatus.shutterSpeed > lastDeviceStatus_.shutterSpeed - exposureError && + deviceStatus.shutterSpeed < lastDeviceStatus_.shutterSpeed + exposureError && + deviceStatus.analogueGain > lastDeviceStatus_.analogueGain - gainError && + deviceStatus.analogueGain < lastDeviceStatus_.analogueGain + gainError && + status_.targetExposureValue > lastTargetExposure_ - targetError && + status_.targetExposureValue < lastTargetExposure_ + targetError) + lockCount_ = std::min(lockCount_ + 1, maxLockCount); + else if (deviceStatus.shutterSpeed < lastDeviceStatus_.shutterSpeed - resetMargin * exposureError || + deviceStatus.shutterSpeed > lastDeviceStatus_.shutterSpeed + resetMargin * exposureError || + deviceStatus.analogueGain < lastDeviceStatus_.analogueGain - resetMargin * gainError || + deviceStatus.analogueGain > lastDeviceStatus_.analogueGain + resetMargin * gainError || + status_.targetExposureValue < lastTargetExposure_ - resetMargin * targetError || + status_.targetExposureValue > lastTargetExposure_ + resetMargin * targetError) + lockCount_ = 0; + + lastDeviceStatus_ = deviceStatus; + lastTargetExposure_ = status_.targetExposureValue; + + LOG(RPiAgc, Debug) << "Lock count updated to " << lockCount_; + status_.locked = lockCount_ == maxLockCount; +} + +static void copyString(std::string const &s, char *d, size_t size) +{ + size_t length = s.copy(d, size - 1); + d[length] = '\0'; +} + +void Agc::housekeepConfig() +{ + /* First fetch all the up-to-date settings, so no one else has to do it. */ + status_.ev = ev_; + status_.fixedShutter = limitShutter(fixedShutter_); + status_.fixedAnalogueGain = fixedAnalogueGain_; + status_.flickerPeriod = flickerPeriod_; + LOG(RPiAgc, Debug) << "ev " << status_.ev << " fixedShutter " + << status_.fixedShutter << " fixedAnalogueGain " + << status_.fixedAnalogueGain; + /* + * Make sure the "mode" pointers point to the up-to-date things, if + * they've changed. + */ + if (strcmp(meteringModeName_.c_str(), status_.meteringMode)) { + auto it = config_.meteringModes.find(meteringModeName_); + if (it == config_.meteringModes.end()) + LOG(RPiAgc, Fatal) << "No metering mode " << meteringModeName_; + meteringMode_ = &it->second; + copyString(meteringModeName_, status_.meteringMode, + sizeof(status_.meteringMode)); + } + if (strcmp(exposureModeName_.c_str(), status_.exposureMode)) { + auto it = config_.exposureModes.find(exposureModeName_); + if (it == config_.exposureModes.end()) + LOG(RPiAgc, Fatal) << "No exposure profile " << exposureModeName_; + exposureMode_ = &it->second; + copyString(exposureModeName_, status_.exposureMode, + sizeof(status_.exposureMode)); + } + if (strcmp(constraintModeName_.c_str(), status_.constraintMode)) { + auto it = + config_.constraintModes.find(constraintModeName_); + if (it == config_.constraintModes.end()) + LOG(RPiAgc, Fatal) << "No constraint list " << constraintModeName_; + constraintMode_ = &it->second; + copyString(constraintModeName_, status_.constraintMode, + sizeof(status_.constraintMode)); + } + LOG(RPiAgc, Debug) << "exposureMode " + << exposureModeName_ << " constraintMode " + << constraintModeName_ << " meteringMode " + << meteringModeName_; +} + +void Agc::fetchCurrentExposure(Metadata *imageMetadata) +{ + std::unique_lock lock(*imageMetadata); + DeviceStatus *deviceStatus = + imageMetadata->getLocked("device.status"); + if (!deviceStatus) + LOG(RPiAgc, Fatal) << "No device metadata"; + current_.shutter = deviceStatus->shutterSpeed; + current_.analogueGain = deviceStatus->analogueGain; + AgcStatus *agcStatus = + imageMetadata->getLocked("agc.status"); + current_.totalExposure = agcStatus ? agcStatus->totalExposureValue : 0s; + current_.totalExposureNoDG = current_.shutter * current_.analogueGain; +} + +void Agc::fetchAwbStatus(Metadata *imageMetadata) +{ + awb_.gainR = 1.0; /* in case not found in metadata */ + awb_.gainG = 1.0; + awb_.gainB = 1.0; + if (imageMetadata->get("awb.status", awb_) != 0) + LOG(RPiAgc, Debug) << "No AWB status found"; +} + +static double computeInitialY(StatisticsPtr &stats, AwbStatus const &awb, + std::vector &weights, double gain) +{ + constexpr uint64_t maxVal = 1 << Statistics::NormalisationFactorPow2; + + ASSERT(weights.size() == stats->agcRegions.numRegions()); + + /* + * Note how the calculation below means that equal weights give you + * "average" metering (i.e. all pixels equally important). + */ + double rSum = 0, gSum = 0, bSum = 0, pixelSum = 0; + for (unsigned int i = 0; i < stats->agcRegions.numRegions(); i++) { + auto ®ion = stats->agcRegions.get(i); + double rAcc = std::min(region.val.rSum * gain, (maxVal - 1) * region.counted); + double gAcc = std::min(region.val.gSum * gain, (maxVal - 1) * region.counted); + double bAcc = std::min(region.val.bSum * gain, (maxVal - 1) * region.counted); + rSum += rAcc * weights[i]; + gSum += gAcc * weights[i]; + bSum += bAcc * weights[i]; + pixelSum += region.counted * weights[i]; + } + if (pixelSum == 0.0) { + LOG(RPiAgc, Warning) << "computeInitialY: pixelSum is zero"; + return 0; + } + double ySum = rSum * awb.gainR * .299 + + gSum * awb.gainG * .587 + + bSum * awb.gainB * .114; + return ySum / pixelSum / maxVal; +} + +/* + * We handle extra gain through EV by adjusting our Y targets. However, you + * simply can't monitor histograms once they get very close to (or beyond!) + * saturation, so we clamp the Y targets to this value. It does mean that EV + * increases don't necessarily do quite what you might expect in certain + * (contrived) cases. + */ + +static constexpr double EvGainYTargetLimit = 0.9; + +static double constraintComputeGain(AgcConstraint &c, const Histogram &h, double lux, + double evGain, double &targetY) +{ + targetY = c.yTarget.eval(c.yTarget.domain().clip(lux)); + targetY = std::min(EvGainYTargetLimit, targetY * evGain); + double iqm = h.interQuantileMean(c.qLo, c.qHi); + return (targetY * h.bins()) / iqm; +} + +void Agc::computeGain(StatisticsPtr &statistics, Metadata *imageMetadata, + double &gain, double &targetY) +{ + struct LuxStatus lux = {}; + lux.lux = 400; /* default lux level to 400 in case no metadata found */ + if (imageMetadata->get("lux.status", lux) != 0) + LOG(RPiAgc, Warning) << "No lux level found"; + const Histogram &h = statistics->yHist; + double evGain = status_.ev * config_.baseEv; + /* + * The initial gain and target_Y come from some of the regions. After + * that we consider the histogram constraints. + */ + targetY = config_.yTarget.eval(config_.yTarget.domain().clip(lux.lux)); + targetY = std::min(EvGainYTargetLimit, targetY * evGain); + + /* + * Do this calculation a few times as brightness increase can be + * non-linear when there are saturated regions. + */ + gain = 1.0; + for (int i = 0; i < 8; i++) { + double initialY = computeInitialY(statistics, awb_, meteringMode_->weights, gain); + double extraGain = std::min(10.0, targetY / (initialY + .001)); + gain *= extraGain; + LOG(RPiAgc, Debug) << "Initial Y " << initialY << " target " << targetY + << " gives gain " << gain; + if (extraGain < 1.01) /* close enough */ + break; + } + + for (auto &c : *constraintMode_) { + double newTargetY; + double newGain = constraintComputeGain(c, h, lux.lux, evGain, newTargetY); + LOG(RPiAgc, Debug) << "Constraint has target_Y " + << newTargetY << " giving gain " << newGain; + if (c.bound == AgcConstraint::Bound::LOWER && newGain > gain) { + LOG(RPiAgc, Debug) << "Lower bound constraint adopted"; + gain = newGain; + targetY = newTargetY; + } else if (c.bound == AgcConstraint::Bound::UPPER && newGain < gain) { + LOG(RPiAgc, Debug) << "Upper bound constraint adopted"; + gain = newGain; + targetY = newTargetY; + } + } + LOG(RPiAgc, Debug) << "Final gain " << gain << " (target_Y " << targetY << " ev " + << status_.ev << " base_ev " << config_.baseEv + << ")"; +} + +void Agc::computeTargetExposure(double gain) +{ + if (status_.fixedShutter && status_.fixedAnalogueGain) { + /* + * When ag and shutter are both fixed, we need to drive the + * total exposure so that we end up with a digital gain of at least + * 1/minColourGain. Otherwise we'd desaturate channels causing + * white to go cyan or magenta. + */ + double minColourGain = std::min({ awb_.gainR, awb_.gainG, awb_.gainB, 1.0 }); + ASSERT(minColourGain != 0.0); + target_.totalExposure = + status_.fixedShutter * status_.fixedAnalogueGain / minColourGain; + } else { + /* + * The statistics reflect the image without digital gain, so the final + * total exposure we're aiming for is: + */ + target_.totalExposure = current_.totalExposureNoDG * gain; + /* The final target exposure is also limited to what the exposure mode allows. */ + Duration maxShutter = status_.fixedShutter + ? status_.fixedShutter + : exposureMode_->shutter.back(); + maxShutter = limitShutter(maxShutter); + Duration maxTotalExposure = + maxShutter * + (status_.fixedAnalogueGain != 0.0 + ? status_.fixedAnalogueGain + : exposureMode_->gain.back()); + target_.totalExposure = std::min(target_.totalExposure, maxTotalExposure); + } + LOG(RPiAgc, Debug) << "Target totalExposure " << target_.totalExposure; +} + +bool Agc::applyDigitalGain(double gain, double targetY) +{ + double minColourGain = std::min({ awb_.gainR, awb_.gainG, awb_.gainB, 1.0 }); + ASSERT(minColourGain != 0.0); + double dg = 1.0 / minColourGain; + /* + * I think this pipeline subtracts black level and rescales before we + * get the stats, so no need to worry about it. + */ + LOG(RPiAgc, Debug) << "after AWB, target dg " << dg << " gain " << gain + << " target_Y " << targetY; + /* + * Finally, if we're trying to reduce exposure but the target_Y is + * "close" to 1.0, then the gain computed for that constraint will be + * only slightly less than one, because the measured Y can never be + * larger than 1.0. When this happens, demand a large digital gain so + * that the exposure can be reduced, de-saturating the image much more + * quickly (and we then approach the correct value more quickly from + * below). + */ + bool desaturate = targetY > config_.fastReduceThreshold && + gain < sqrt(targetY); + if (desaturate) + dg /= config_.fastReduceThreshold; + LOG(RPiAgc, Debug) << "Digital gain " << dg << " desaturate? " << desaturate; + target_.totalExposureNoDG = target_.totalExposure / dg; + LOG(RPiAgc, Debug) << "Target totalExposureNoDG " << target_.totalExposureNoDG; + return desaturate; +} + +void Agc::filterExposure(bool desaturate) +{ + double speed = config_.speed; + /* + * AGC adapts instantly if both shutter and gain are directly specified + * or we're in the startup phase. + */ + if ((status_.fixedShutter && status_.fixedAnalogueGain) || + frameCount_ <= config_.startupFrames) + speed = 1.0; + if (!filtered_.totalExposure) { + filtered_.totalExposure = target_.totalExposure; + filtered_.totalExposureNoDG = target_.totalExposureNoDG; + } else { + /* + * If close to the result go faster, to save making so many + * micro-adjustments on the way. (Make this customisable?) + */ + if (filtered_.totalExposure < 1.2 * target_.totalExposure && + filtered_.totalExposure > 0.8 * target_.totalExposure) + speed = sqrt(speed); + filtered_.totalExposure = speed * target_.totalExposure + + filtered_.totalExposure * (1.0 - speed); + /* + * When desaturing, take a big jump down in totalExposureNoDG, + * which we'll hide with digital gain. + */ + if (desaturate) + filtered_.totalExposureNoDG = + target_.totalExposureNoDG; + else + filtered_.totalExposureNoDG = + speed * target_.totalExposureNoDG + + filtered_.totalExposureNoDG * (1.0 - speed); + } + /* + * We can't let the totalExposureNoDG exposure deviate too far below the + * total exposure, as there might not be enough digital gain available + * in the ISP to hide it (which will cause nasty oscillation). + */ + if (filtered_.totalExposureNoDG < + filtered_.totalExposure * config_.fastReduceThreshold) + filtered_.totalExposureNoDG = filtered_.totalExposure * config_.fastReduceThreshold; + LOG(RPiAgc, Debug) << "After filtering, totalExposure " << filtered_.totalExposure + << " no dg " << filtered_.totalExposureNoDG; +} + +void Agc::divideUpExposure() +{ + /* + * Sending the fixed shutter/gain cases through the same code may seem + * unnecessary, but it will make more sense when extend this to cover + * variable aperture. + */ + Duration exposureValue = filtered_.totalExposureNoDG; + Duration shutterTime; + double analogueGain; + shutterTime = status_.fixedShutter ? status_.fixedShutter + : exposureMode_->shutter[0]; + shutterTime = limitShutter(shutterTime); + analogueGain = status_.fixedAnalogueGain != 0.0 ? status_.fixedAnalogueGain + : exposureMode_->gain[0]; + analogueGain = limitGain(analogueGain); + if (shutterTime * analogueGain < exposureValue) { + for (unsigned int stage = 1; + stage < exposureMode_->gain.size(); stage++) { + if (!status_.fixedShutter) { + Duration stageShutter = + limitShutter(exposureMode_->shutter[stage]); + if (stageShutter * analogueGain >= exposureValue) { + shutterTime = exposureValue / analogueGain; + break; + } + shutterTime = stageShutter; + } + if (status_.fixedAnalogueGain == 0.0) { + if (exposureMode_->gain[stage] * shutterTime >= exposureValue) { + analogueGain = exposureValue / shutterTime; + break; + } + analogueGain = exposureMode_->gain[stage]; + analogueGain = limitGain(analogueGain); + } + } + } + LOG(RPiAgc, Debug) << "Divided up shutter and gain are " << shutterTime << " and " + << analogueGain; + /* + * Finally adjust shutter time for flicker avoidance (require both + * shutter and gain not to be fixed). + */ + if (!status_.fixedShutter && !status_.fixedAnalogueGain && + status_.flickerPeriod) { + int flickerPeriods = shutterTime / status_.flickerPeriod; + if (flickerPeriods) { + Duration newShutterTime = flickerPeriods * status_.flickerPeriod; + analogueGain *= shutterTime / newShutterTime; + /* + * We should still not allow the ag to go over the + * largest value in the exposure mode. Note that this + * may force more of the total exposure into the digital + * gain as a side-effect. + */ + analogueGain = std::min(analogueGain, exposureMode_->gain.back()); + analogueGain = limitGain(analogueGain); + shutterTime = newShutterTime; + } + LOG(RPiAgc, Debug) << "After flicker avoidance, shutter " + << shutterTime << " gain " << analogueGain; + } + filtered_.shutter = shutterTime; + filtered_.analogueGain = analogueGain; +} + +void Agc::writeAndFinish(Metadata *imageMetadata, bool desaturate) +{ + status_.totalExposureValue = filtered_.totalExposure; + status_.targetExposureValue = desaturate ? 0s : target_.totalExposureNoDG; + status_.shutterTime = filtered_.shutter; + status_.analogueGain = filtered_.analogueGain; + /* + * Write to metadata as well, in case anyone wants to update the camera + * immediately. + */ + imageMetadata->set("agc.status", status_); + LOG(RPiAgc, Debug) << "Output written, total exposure requested is " + << filtered_.totalExposure; + LOG(RPiAgc, Debug) << "Camera exposure update: shutter time " << filtered_.shutter + << " analogue gain " << filtered_.analogueGain; +} + +Duration Agc::limitShutter(Duration shutter) +{ + /* + * shutter == 0 is a special case for fixed shutter values, and must pass + * through unchanged + */ + if (!shutter) + return shutter; + + shutter = std::clamp(shutter, mode_.minShutter, maxShutter_); + return shutter; +} + +double Agc::limitGain(double gain) const +{ + /* + * Only limit the lower bounds of the gain value to what the sensor limits. + * The upper bound on analogue gain will be made up with additional digital + * gain applied by the ISP. + * + * gain == 0.0 is a special case for fixed shutter values, and must pass + * through unchanged + */ + if (!gain) + return gain; + + gain = std::max(gain, mode_.minAnalogueGain); + return gain; +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Agc(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/agc.h b/src/ipa/rpi/controller/rpi/agc.h new file mode 100644 index 00000000..4e5f272f --- /dev/null +++ b/src/ipa/rpi/controller/rpi/agc.h @@ -0,0 +1,133 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * agc.h - AGC/AEC control algorithm + */ +#pragma once + +#include +#include + +#include + +#include "../agc_algorithm.h" +#include "../agc_status.h" +#include "../pwl.h" + +/* This is our implementation of AGC. */ + +namespace RPiController { + +struct AgcMeteringMode { + std::vector weights; + int read(const libcamera::YamlObject ¶ms); +}; + +struct AgcExposureMode { + std::vector shutter; + std::vector gain; + int read(const libcamera::YamlObject ¶ms); +}; + +struct AgcConstraint { + enum class Bound { LOWER = 0, UPPER = 1 }; + Bound bound; + double qLo; + double qHi; + Pwl yTarget; + int read(const libcamera::YamlObject ¶ms); +}; + +typedef std::vector AgcConstraintMode; + +struct AgcConfig { + int read(const libcamera::YamlObject ¶ms); + std::map meteringModes; + std::map exposureModes; + std::map constraintModes; + Pwl yTarget; + double speed; + uint16_t startupFrames; + unsigned int convergenceFrames; + double maxChange; + double minChange; + double fastReduceThreshold; + double speedUpThreshold; + std::string defaultMeteringMode; + std::string defaultExposureMode; + std::string defaultConstraintMode; + double baseEv; + libcamera::utils::Duration defaultExposureTime; + double defaultAnalogueGain; +}; + +class Agc : public AgcAlgorithm +{ +public: + Agc(Controller *controller); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + unsigned int getConvergenceFrames() const override; + void setEv(double ev) override; + void setFlickerPeriod(libcamera::utils::Duration flickerPeriod) override; + void setMaxShutter(libcamera::utils::Duration maxShutter) override; + void setFixedShutter(libcamera::utils::Duration fixedShutter) override; + void setFixedAnalogueGain(double fixedAnalogueGain) override; + void setMeteringMode(std::string const &meteringModeName) override; + void setExposureMode(std::string const &exposureModeName) override; + void setConstraintMode(std::string const &contraintModeName) override; + void enableAuto() override; + void disableAuto() override; + void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; + void prepare(Metadata *imageMetadata) override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; + +private: + void updateLockStatus(DeviceStatus const &deviceStatus); + AgcConfig config_; + void housekeepConfig(); + void fetchCurrentExposure(Metadata *imageMetadata); + void fetchAwbStatus(Metadata *imageMetadata); + void computeGain(StatisticsPtr &statistics, Metadata *imageMetadata, + double &gain, double &targetY); + void computeTargetExposure(double gain); + bool applyDigitalGain(double gain, double targetY); + void filterExposure(bool desaturate); + void divideUpExposure(); + void writeAndFinish(Metadata *imageMetadata, bool desaturate); + libcamera::utils::Duration limitShutter(libcamera::utils::Duration shutter); + double limitGain(double gain) const; + AgcMeteringMode *meteringMode_; + AgcExposureMode *exposureMode_; + AgcConstraintMode *constraintMode_; + CameraMode mode_; + uint64_t frameCount_; + AwbStatus awb_; + struct ExposureValues { + ExposureValues(); + + libcamera::utils::Duration shutter; + double analogueGain; + libcamera::utils::Duration totalExposure; + libcamera::utils::Duration totalExposureNoDG; /* without digital gain */ + }; + ExposureValues current_; /* values for the current frame */ + ExposureValues target_; /* calculate the values we want here */ + ExposureValues filtered_; /* these values are filtered towards target */ + AgcStatus status_; + int lockCount_; + DeviceStatus lastDeviceStatus_; + libcamera::utils::Duration lastTargetExposure_; + /* Below here the "settings" that applications can change. */ + std::string meteringModeName_; + std::string exposureModeName_; + std::string constraintModeName_; + double ev_; + libcamera::utils::Duration flickerPeriod_; + libcamera::utils::Duration maxShutter_; + libcamera::utils::Duration fixedShutter_; + double fixedAnalogueGain_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/alsc.cpp b/src/ipa/rpi/controller/rpi/alsc.cpp new file mode 100644 index 00000000..3a2e8fe0 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/alsc.cpp @@ -0,0 +1,865 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * alsc.cpp - ALSC (auto lens shading correction) control algorithm + */ + +#include +#include +#include +#include + +#include +#include + +#include "../awb_status.h" +#include "alsc.h" + +/* Raspberry Pi ALSC (Auto Lens Shading Correction) algorithm. */ + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiAlsc) + +#define NAME "rpi.alsc" + +static const double InsufficientData = -1.0; + +Alsc::Alsc(Controller *controller) + : Algorithm(controller) +{ + asyncAbort_ = asyncStart_ = asyncStarted_ = asyncFinished_ = false; + asyncThread_ = std::thread(std::bind(&Alsc::asyncFunc, this)); +} + +Alsc::~Alsc() +{ + { + std::lock_guard lock(mutex_); + asyncAbort_ = true; + } + asyncSignal_.notify_one(); + asyncThread_.join(); +} + +char const *Alsc::name() const +{ + return NAME; +} + +static int generateLut(Array2D &lut, const libcamera::YamlObject ¶ms) +{ + /* These must be signed ints for the co-ordinate calculations below. */ + int X = lut.dimensions().width, Y = lut.dimensions().height; + double cstrength = params["corner_strength"].get(2.0); + if (cstrength <= 1.0) { + LOG(RPiAlsc, Error) << "corner_strength must be > 1.0"; + return -EINVAL; + } + + double asymmetry = params["asymmetry"].get(1.0); + if (asymmetry < 0) { + LOG(RPiAlsc, Error) << "asymmetry must be >= 0"; + return -EINVAL; + } + + double f1 = cstrength - 1, f2 = 1 + sqrt(cstrength); + double R2 = X * Y / 4 * (1 + asymmetry * asymmetry); + int num = 0; + for (int y = 0; y < Y; y++) { + for (int x = 0; x < X; x++) { + double dy = y - Y / 2 + 0.5, + dx = (x - X / 2 + 0.5) * asymmetry; + double r2 = (dx * dx + dy * dy) / R2; + lut[num++] = + (f1 * r2 + f2) * (f1 * r2 + f2) / + (f2 * f2); /* this reproduces the cos^4 rule */ + } + } + return 0; +} + +static int readLut(Array2D &lut, const libcamera::YamlObject ¶ms) +{ + if (params.size() != lut.size()) { + LOG(RPiAlsc, Error) << "Invalid number of entries in LSC table"; + return -EINVAL; + } + + int num = 0; + for (const auto &p : params.asList()) { + auto value = p.get(); + if (!value) + return -EINVAL; + lut[num++] = *value; + } + + return 0; +} + +static int readCalibrations(std::vector &calibrations, + const libcamera::YamlObject ¶ms, + std::string const &name, const Size &size) +{ + if (params.contains(name)) { + double lastCt = 0; + for (const auto &p : params[name].asList()) { + auto value = p["ct"].get(); + if (!value) + return -EINVAL; + double ct = *value; + if (ct <= lastCt) { + LOG(RPiAlsc, Error) + << "Entries in " << name << " must be in increasing ct order"; + return -EINVAL; + } + AlscCalibration calibration; + calibration.ct = lastCt = ct; + + const libcamera::YamlObject &table = p["table"]; + if (table.size() != size.width * size.height) { + LOG(RPiAlsc, Error) + << "Incorrect number of values for ct " + << ct << " in " << name; + return -EINVAL; + } + + int num = 0; + calibration.table.resize(size); + for (const auto &elem : table.asList()) { + value = elem.get(); + if (!value) + return -EINVAL; + calibration.table[num++] = *value; + } + + calibrations.push_back(std::move(calibration)); + LOG(RPiAlsc, Debug) + << "Read " << name << " calibration for ct " << ct; + } + } + return 0; +} + +int Alsc::read(const libcamera::YamlObject ¶ms) +{ + config_.tableSize = getHardwareConfig().awbRegions; + config_.framePeriod = params["frame_period"].get(12); + config_.startupFrames = params["startup_frames"].get(10); + config_.speed = params["speed"].get(0.05); + double sigma = params["sigma"].get(0.01); + config_.sigmaCr = params["sigma_Cr"].get(sigma); + config_.sigmaCb = params["sigma_Cb"].get(sigma); + config_.minCount = params["min_count"].get(10.0); + config_.minG = params["min_G"].get(50); + config_.omega = params["omega"].get(1.3); + config_.nIter = params["n_iter"].get(config_.tableSize.width + config_.tableSize.height); + config_.luminanceStrength = + params["luminance_strength"].get(1.0); + + config_.luminanceLut.resize(config_.tableSize, 1.0); + int ret = 0; + + if (params.contains("corner_strength")) + ret = generateLut(config_.luminanceLut, params); + else if (params.contains("luminance_lut")) + ret = readLut(config_.luminanceLut, params["luminance_lut"]); + else + LOG(RPiAlsc, Warning) + << "no luminance table - assume unity everywhere"; + if (ret) + return ret; + + ret = readCalibrations(config_.calibrationsCr, params, "calibrations_Cr", + config_.tableSize); + if (ret) + return ret; + ret = readCalibrations(config_.calibrationsCb, params, "calibrations_Cb", + config_.tableSize); + if (ret) + return ret; + + config_.defaultCt = params["default_ct"].get(4500.0); + config_.threshold = params["threshold"].get(1e-3); + config_.lambdaBound = params["lambda_bound"].get(0.05); + + return 0; +} + +static double getCt(Metadata *metadata, double defaultCt); +static void getCalTable(double ct, std::vector const &calibrations, + Array2D &calTable); +static void resampleCalTable(const Array2D &calTableIn, CameraMode const &cameraMode, + Array2D &calTableOut); +static void compensateLambdasForCal(const Array2D &calTable, + const Array2D &oldLambdas, + Array2D &newLambdas); +static void addLuminanceToTables(std::array, 3> &results, + const Array2D &lambdaR, double lambdaG, + const Array2D &lambdaB, + const Array2D &luminanceLut, + double luminanceStrength); + +void Alsc::initialise() +{ + frameCount2_ = frameCount_ = framePhase_ = 0; + firstTime_ = true; + ct_ = config_.defaultCt; + + const size_t XY = config_.tableSize.width * config_.tableSize.height; + + for (auto &r : syncResults_) + r.resize(config_.tableSize); + for (auto &r : prevSyncResults_) + r.resize(config_.tableSize); + for (auto &r : asyncResults_) + r.resize(config_.tableSize); + + luminanceTable_.resize(config_.tableSize); + asyncLambdaR_.resize(config_.tableSize); + asyncLambdaB_.resize(config_.tableSize); + /* The lambdas are initialised in the SwitchMode. */ + lambdaR_.resize(config_.tableSize); + lambdaB_.resize(config_.tableSize); + + /* Temporaries for the computations, but sensible to allocate this up-front! */ + for (auto &c : tmpC_) + c.resize(config_.tableSize); + for (auto &m : tmpM_) + m.resize(XY); +} + +void Alsc::waitForAysncThread() +{ + if (asyncStarted_) { + asyncStarted_ = false; + std::unique_lock lock(mutex_); + syncSignal_.wait(lock, [&] { + return asyncFinished_; + }); + asyncFinished_ = false; + } +} + +static bool compareModes(CameraMode const &cm0, CameraMode const &cm1) +{ + /* + * Return true if the modes crop from the sensor significantly differently, + * or if the user transform has changed. + */ + if (cm0.transform != cm1.transform) + return true; + int leftDiff = abs(cm0.cropX - cm1.cropX); + int topDiff = abs(cm0.cropY - cm1.cropY); + int rightDiff = fabs(cm0.cropX + cm0.scaleX * cm0.width - + cm1.cropX - cm1.scaleX * cm1.width); + int bottomDiff = fabs(cm0.cropY + cm0.scaleY * cm0.height - + cm1.cropY - cm1.scaleY * cm1.height); + /* + * These thresholds are a rather arbitrary amount chosen to trigger + * when carrying on with the previously calculated tables might be + * worse than regenerating them (but without the adaptive algorithm). + */ + int thresholdX = cm0.sensorWidth >> 4; + int thresholdY = cm0.sensorHeight >> 4; + return leftDiff > thresholdX || rightDiff > thresholdX || + topDiff > thresholdY || bottomDiff > thresholdY; +} + +void Alsc::switchMode(CameraMode const &cameraMode, + [[maybe_unused]] Metadata *metadata) +{ + /* + * We're going to start over with the tables if there's any "significant" + * change. + */ + bool resetTables = firstTime_ || compareModes(cameraMode_, cameraMode); + + /* Believe the colour temperature from the AWB, if there is one. */ + ct_ = getCt(metadata, ct_); + + /* Ensure the other thread isn't running while we do this. */ + waitForAysncThread(); + + cameraMode_ = cameraMode; + + /* + * We must resample the luminance table like we do the others, but it's + * fixed so we can simply do it up front here. + */ + resampleCalTable(config_.luminanceLut, cameraMode_, luminanceTable_); + + if (resetTables) { + /* + * Upon every "table reset", arrange for something sensible to be + * generated. Construct the tables for the previous recorded colour + * temperature. In order to start over from scratch we initialise + * the lambdas, but the rest of this code then echoes the code in + * doAlsc, without the adaptive algorithm. + */ + std::fill(lambdaR_.begin(), lambdaR_.end(), 1.0); + std::fill(lambdaB_.begin(), lambdaB_.end(), 1.0); + Array2D &calTableR = tmpC_[0], &calTableB = tmpC_[1], &calTableTmp = tmpC_[2]; + getCalTable(ct_, config_.calibrationsCr, calTableTmp); + resampleCalTable(calTableTmp, cameraMode_, calTableR); + getCalTable(ct_, config_.calibrationsCb, calTableTmp); + resampleCalTable(calTableTmp, cameraMode_, calTableB); + compensateLambdasForCal(calTableR, lambdaR_, asyncLambdaR_); + compensateLambdasForCal(calTableB, lambdaB_, asyncLambdaB_); + addLuminanceToTables(syncResults_, asyncLambdaR_, 1.0, asyncLambdaB_, + luminanceTable_, config_.luminanceStrength); + prevSyncResults_ = syncResults_; + framePhase_ = config_.framePeriod; /* run the algo again asap */ + firstTime_ = false; + } +} + +void Alsc::fetchAsyncResults() +{ + LOG(RPiAlsc, Debug) << "Fetch ALSC results"; + asyncFinished_ = false; + asyncStarted_ = false; + syncResults_ = asyncResults_; +} + +double getCt(Metadata *metadata, double defaultCt) +{ + AwbStatus awbStatus; + awbStatus.temperatureK = defaultCt; /* in case nothing found */ + if (metadata->get("awb.status", awbStatus) != 0) + LOG(RPiAlsc, Debug) << "no AWB results found, using " + << awbStatus.temperatureK; + else + LOG(RPiAlsc, Debug) << "AWB results found, using " + << awbStatus.temperatureK; + return awbStatus.temperatureK; +} + +static void copyStats(RgbyRegions ®ions, StatisticsPtr &stats, + AlscStatus const &status) +{ + if (!regions.numRegions()) + regions.init(stats->awbRegions.size()); + + const std::vector &rTable = status.r; + const std::vector &gTable = status.g; + const std::vector &bTable = status.b; + for (unsigned int i = 0; i < stats->awbRegions.numRegions(); i++) { + auto r = stats->awbRegions.get(i); + r.val.rSum = static_cast(r.val.rSum / rTable[i]); + r.val.gSum = static_cast(r.val.gSum / gTable[i]); + r.val.bSum = static_cast(r.val.bSum / bTable[i]); + regions.set(i, r); + } +} + +void Alsc::restartAsync(StatisticsPtr &stats, Metadata *imageMetadata) +{ + LOG(RPiAlsc, Debug) << "Starting ALSC calculation"; + /* + * Get the current colour temperature. It's all we need from the + * metadata. Default to the last CT value (which could be the default). + */ + ct_ = getCt(imageMetadata, ct_); + /* + * We have to copy the statistics here, dividing out our best guess of + * the LSC table that the pipeline applied to them. + */ + AlscStatus alscStatus; + if (imageMetadata->get("alsc.status", alscStatus) != 0) { + LOG(RPiAlsc, Warning) + << "No ALSC status found for applied gains!"; + alscStatus.r.resize(config_.tableSize.width * config_.tableSize.height, 1.0); + alscStatus.g.resize(config_.tableSize.width * config_.tableSize.height, 1.0); + alscStatus.b.resize(config_.tableSize.width * config_.tableSize.height, 1.0); + } + copyStats(statistics_, stats, alscStatus); + framePhase_ = 0; + asyncStarted_ = true; + { + std::lock_guard lock(mutex_); + asyncStart_ = true; + } + asyncSignal_.notify_one(); +} + +void Alsc::prepare(Metadata *imageMetadata) +{ + /* + * Count frames since we started, and since we last poked the async + * thread. + */ + if (frameCount_ < (int)config_.startupFrames) + frameCount_++; + double speed = frameCount_ < (int)config_.startupFrames + ? 1.0 + : config_.speed; + LOG(RPiAlsc, Debug) + << "frame count " << frameCount_ << " speed " << speed; + { + std::unique_lock lock(mutex_); + if (asyncStarted_ && asyncFinished_) + fetchAsyncResults(); + } + /* Apply IIR filter to results and program into the pipeline. */ + for (unsigned int j = 0; j < syncResults_.size(); j++) { + for (unsigned int i = 0; i < syncResults_[j].size(); i++) + prevSyncResults_[j][i] = speed * syncResults_[j][i] + (1.0 - speed) * prevSyncResults_[j][i]; + } + /* Put output values into status metadata. */ + AlscStatus status; + status.r = prevSyncResults_[0].data(); + status.g = prevSyncResults_[1].data(); + status.b = prevSyncResults_[2].data(); + imageMetadata->set("alsc.status", status); +} + +void Alsc::process(StatisticsPtr &stats, Metadata *imageMetadata) +{ + /* + * Count frames since we started, and since we last poked the async + * thread. + */ + if (framePhase_ < (int)config_.framePeriod) + framePhase_++; + if (frameCount2_ < (int)config_.startupFrames) + frameCount2_++; + LOG(RPiAlsc, Debug) << "frame_phase " << framePhase_; + if (framePhase_ >= (int)config_.framePeriod || + frameCount2_ < (int)config_.startupFrames) { + if (asyncStarted_ == false) + restartAsync(stats, imageMetadata); + } +} + +void Alsc::asyncFunc() +{ + while (true) { + { + std::unique_lock lock(mutex_); + asyncSignal_.wait(lock, [&] { + return asyncStart_ || asyncAbort_; + }); + asyncStart_ = false; + if (asyncAbort_) + break; + } + doAlsc(); + { + std::lock_guard lock(mutex_); + asyncFinished_ = true; + } + syncSignal_.notify_one(); + } +} + +void getCalTable(double ct, std::vector const &calibrations, + Array2D &calTable) +{ + if (calibrations.empty()) { + std::fill(calTable.begin(), calTable.end(), 1.0); + LOG(RPiAlsc, Debug) << "no calibrations found"; + } else if (ct <= calibrations.front().ct) { + calTable = calibrations.front().table; + LOG(RPiAlsc, Debug) << "using calibration for " + << calibrations.front().ct; + } else if (ct >= calibrations.back().ct) { + calTable = calibrations.back().table; + LOG(RPiAlsc, Debug) << "using calibration for " + << calibrations.back().ct; + } else { + int idx = 0; + while (ct > calibrations[idx + 1].ct) + idx++; + double ct0 = calibrations[idx].ct, ct1 = calibrations[idx + 1].ct; + LOG(RPiAlsc, Debug) + << "ct is " << ct << ", interpolating between " + << ct0 << " and " << ct1; + for (unsigned int i = 0; i < calTable.size(); i++) + calTable[i] = + (calibrations[idx].table[i] * (ct1 - ct) + + calibrations[idx + 1].table[i] * (ct - ct0)) / + (ct1 - ct0); + } +} + +void resampleCalTable(const Array2D &calTableIn, + CameraMode const &cameraMode, + Array2D &calTableOut) +{ + int X = calTableIn.dimensions().width; + int Y = calTableIn.dimensions().height; + + /* + * Precalculate and cache the x sampling locations and phases to save + * recomputing them on every row. + */ + int xLo[X], xHi[X]; + double xf[X]; + double scaleX = cameraMode.sensorWidth / + (cameraMode.width * cameraMode.scaleX); + double xOff = cameraMode.cropX / (double)cameraMode.sensorWidth; + double x = .5 / scaleX + xOff * X - .5; + double xInc = 1 / scaleX; + for (int i = 0; i < X; i++, x += xInc) { + xLo[i] = floor(x); + xf[i] = x - xLo[i]; + xHi[i] = std::min(xLo[i] + 1, X - 1); + xLo[i] = std::max(xLo[i], 0); + if (!!(cameraMode.transform & libcamera::Transform::HFlip)) { + xLo[i] = X - 1 - xLo[i]; + xHi[i] = X - 1 - xHi[i]; + } + } + /* Now march over the output table generating the new values. */ + double scaleY = cameraMode.sensorHeight / + (cameraMode.height * cameraMode.scaleY); + double yOff = cameraMode.cropY / (double)cameraMode.sensorHeight; + double y = .5 / scaleY + yOff * Y - .5; + double yInc = 1 / scaleY; + for (int j = 0; j < Y; j++, y += yInc) { + int yLo = floor(y); + double yf = y - yLo; + int yHi = std::min(yLo + 1, Y - 1); + yLo = std::max(yLo, 0); + if (!!(cameraMode.transform & libcamera::Transform::VFlip)) { + yLo = Y - 1 - yLo; + yHi = Y - 1 - yHi; + } + double const *rowAbove = calTableIn.ptr() + X * yLo; + double const *rowBelow = calTableIn.ptr() + X * yHi; + double *out = calTableOut.ptr() + X * j; + for (int i = 0; i < X; i++) { + double above = rowAbove[xLo[i]] * (1 - xf[i]) + + rowAbove[xHi[i]] * xf[i]; + double below = rowBelow[xLo[i]] * (1 - xf[i]) + + rowBelow[xHi[i]] * xf[i]; + *(out++) = above * (1 - yf) + below * yf; + } + } +} + +/* Calculate chrominance statistics (R/G and B/G) for each region. */ +static void calculateCrCb(const RgbyRegions &awbRegion, Array2D &cr, + Array2D &cb, uint32_t minCount, uint16_t minG) +{ + for (unsigned int i = 0; i < cr.size(); i++) { + auto s = awbRegion.get(i); + + if (s.counted <= minCount || s.val.gSum / s.counted <= minG) { + cr[i] = cb[i] = InsufficientData; + continue; + } + + cr[i] = s.val.rSum / (double)s.val.gSum; + cb[i] = s.val.bSum / (double)s.val.gSum; + } +} + +static void applyCalTable(const Array2D &calTable, Array2D &C) +{ + for (unsigned int i = 0; i < C.size(); i++) + if (C[i] != InsufficientData) + C[i] *= calTable[i]; +} + +void compensateLambdasForCal(const Array2D &calTable, + const Array2D &oldLambdas, + Array2D &newLambdas) +{ + double minNewLambda = std::numeric_limits::max(); + for (unsigned int i = 0; i < newLambdas.size(); i++) { + newLambdas[i] = oldLambdas[i] * calTable[i]; + minNewLambda = std::min(minNewLambda, newLambdas[i]); + } + for (unsigned int i = 0; i < newLambdas.size(); i++) + newLambdas[i] /= minNewLambda; +} + +[[maybe_unused]] static void printCalTable(const Array2D &C) +{ + const Size &size = C.dimensions(); + printf("table: [\n"); + for (unsigned int j = 0; j < size.height; j++) { + for (unsigned int i = 0; i < size.width; i++) { + printf("%5.3f", 1.0 / C[j * size.width + i]); + if (i != size.width - 1 || j != size.height - 1) + printf(","); + } + printf("\n"); + } + printf("]\n"); +} + +/* + * Compute weight out of 1.0 which reflects how similar we wish to make the + * colours of these two regions. + */ +static double computeWeight(double Ci, double Cj, double sigma) +{ + if (Ci == InsufficientData || Cj == InsufficientData) + return 0; + double diff = (Ci - Cj) / sigma; + return exp(-diff * diff / 2); +} + +/* Compute all weights. */ +static void computeW(const Array2D &C, double sigma, + SparseArray &W) +{ + size_t XY = C.size(); + size_t X = C.dimensions().width; + + for (unsigned int i = 0; i < XY; i++) { + /* Start with neighbour above and go clockwise. */ + W[i][0] = i >= X ? computeWeight(C[i], C[i - X], sigma) : 0; + W[i][1] = i % X < X - 1 ? computeWeight(C[i], C[i + 1], sigma) : 0; + W[i][2] = i < XY - X ? computeWeight(C[i], C[i + X], sigma) : 0; + W[i][3] = i % X ? computeWeight(C[i], C[i - 1], sigma) : 0; + } +} + +/* Compute M, the large but sparse matrix such that M * lambdas = 0. */ +static void constructM(const Array2D &C, + const SparseArray &W, + SparseArray &M) +{ + size_t XY = C.size(); + size_t X = C.dimensions().width; + + double epsilon = 0.001; + for (unsigned int i = 0; i < XY; i++) { + /* + * Note how, if C[i] == INSUFFICIENT_DATA, the weights will all + * be zero so the equation is still set up correctly. + */ + int m = !!(i >= X) + !!(i % X < X - 1) + !!(i < XY - X) + + !!(i % X); /* total number of neighbours */ + /* we'll divide the diagonal out straight away */ + double diagonal = (epsilon + W[i][0] + W[i][1] + W[i][2] + W[i][3]) * C[i]; + M[i][0] = i >= X ? (W[i][0] * C[i - X] + epsilon / m * C[i]) / diagonal : 0; + M[i][1] = i % X < X - 1 ? (W[i][1] * C[i + 1] + epsilon / m * C[i]) / diagonal : 0; + M[i][2] = i < XY - X ? (W[i][2] * C[i + X] + epsilon / m * C[i]) / diagonal : 0; + M[i][3] = i % X ? (W[i][3] * C[i - 1] + epsilon / m * C[i]) / diagonal : 0; + } +} + +/* + * In the compute_lambda_ functions, note that the matrix coefficients for the + * left/right neighbours are zero down the left/right edges, so we don't need + * need to test the i value to exclude them. + */ +static double computeLambdaBottom(int i, const SparseArray &M, + Array2D &lambda) +{ + return M[i][1] * lambda[i + 1] + M[i][2] * lambda[i + lambda.dimensions().width] + + M[i][3] * lambda[i - 1]; +} +static double computeLambdaBottomStart(int i, const SparseArray &M, + Array2D &lambda) +{ + return M[i][1] * lambda[i + 1] + M[i][2] * lambda[i + lambda.dimensions().width]; +} +static double computeLambdaInterior(int i, const SparseArray &M, + Array2D &lambda) +{ + return M[i][0] * lambda[i - lambda.dimensions().width] + M[i][1] * lambda[i + 1] + + M[i][2] * lambda[i + lambda.dimensions().width] + M[i][3] * lambda[i - 1]; +} +static double computeLambdaTop(int i, const SparseArray &M, + Array2D &lambda) +{ + return M[i][0] * lambda[i - lambda.dimensions().width] + M[i][1] * lambda[i + 1] + + M[i][3] * lambda[i - 1]; +} +static double computeLambdaTopEnd(int i, const SparseArray &M, + Array2D &lambda) +{ + return M[i][0] * lambda[i - lambda.dimensions().width] + M[i][3] * lambda[i - 1]; +} + +/* Gauss-Seidel iteration with over-relaxation. */ +static double gaussSeidel2Sor(const SparseArray &M, double omega, + Array2D &lambda, double lambdaBound) +{ + int XY = lambda.size(); + int X = lambda.dimensions().width; + const double min = 1 - lambdaBound, max = 1 + lambdaBound; + Array2D oldLambda = lambda; + int i; + lambda[0] = computeLambdaBottomStart(0, M, lambda); + lambda[0] = std::clamp(lambda[0], min, max); + for (i = 1; i < X; i++) { + lambda[i] = computeLambdaBottom(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + } + for (; i < XY - X; i++) { + lambda[i] = computeLambdaInterior(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + } + for (; i < XY - 1; i++) { + lambda[i] = computeLambdaTop(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + } + lambda[i] = computeLambdaTopEnd(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + /* + * Also solve the system from bottom to top, to help spread the updates + * better. + */ + lambda[i] = computeLambdaTopEnd(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + for (i = XY - 2; i >= XY - X; i--) { + lambda[i] = computeLambdaTop(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + } + for (; i >= X; i--) { + lambda[i] = computeLambdaInterior(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + } + for (; i >= 1; i--) { + lambda[i] = computeLambdaBottom(i, M, lambda); + lambda[i] = std::clamp(lambda[i], min, max); + } + lambda[0] = computeLambdaBottomStart(0, M, lambda); + lambda[0] = std::clamp(lambda[0], min, max); + double maxDiff = 0; + for (i = 0; i < XY; i++) { + lambda[i] = oldLambda[i] + (lambda[i] - oldLambda[i]) * omega; + if (fabs(lambda[i] - oldLambda[i]) > fabs(maxDiff)) + maxDiff = lambda[i] - oldLambda[i]; + } + return maxDiff; +} + +/* Normalise the values so that the smallest value is 1. */ +static void normalise(Array2D &results) +{ + double minval = *std::min_element(results.begin(), results.end()); + std::for_each(results.begin(), results.end(), + [minval](double val) { return val / minval; }); +} + +/* Rescale the values so that the average value is 1. */ +static void reaverage(Array2D &data) +{ + double sum = std::accumulate(data.begin(), data.end(), 0.0); + double ratio = 1 / (sum / data.size()); + std::for_each(data.begin(), data.end(), + [ratio](double val) { return val * ratio; }); +} + +static void runMatrixIterations(const Array2D &C, + Array2D &lambda, + const SparseArray &W, + SparseArray &M, double omega, + unsigned int nIter, double threshold, double lambdaBound) +{ + constructM(C, W, M); + double lastMaxDiff = std::numeric_limits::max(); + for (unsigned int i = 0; i < nIter; i++) { + double maxDiff = fabs(gaussSeidel2Sor(M, omega, lambda, lambdaBound)); + if (maxDiff < threshold) { + LOG(RPiAlsc, Debug) + << "Stop after " << i + 1 << " iterations"; + break; + } + /* + * this happens very occasionally (so make a note), though + * doesn't seem to matter + */ + if (maxDiff > lastMaxDiff) + LOG(RPiAlsc, Debug) + << "Iteration " << i << ": maxDiff gone up " + << lastMaxDiff << " to " << maxDiff; + lastMaxDiff = maxDiff; + } + /* We're going to normalise the lambdas so the total average is 1. */ + reaverage(lambda); +} + +static void addLuminanceRb(Array2D &result, const Array2D &lambda, + const Array2D &luminanceLut, + double luminanceStrength) +{ + for (unsigned int i = 0; i < result.size(); i++) + result[i] = lambda[i] * ((luminanceLut[i] - 1) * luminanceStrength + 1); +} + +static void addLuminanceG(Array2D &result, double lambda, + const Array2D &luminanceLut, + double luminanceStrength) +{ + for (unsigned int i = 0; i < result.size(); i++) + result[i] = lambda * ((luminanceLut[i] - 1) * luminanceStrength + 1); +} + +void addLuminanceToTables(std::array, 3> &results, + const Array2D &lambdaR, + double lambdaG, const Array2D &lambdaB, + const Array2D &luminanceLut, + double luminanceStrength) +{ + addLuminanceRb(results[0], lambdaR, luminanceLut, luminanceStrength); + addLuminanceG(results[1], lambdaG, luminanceLut, luminanceStrength); + addLuminanceRb(results[2], lambdaB, luminanceLut, luminanceStrength); + for (auto &r : results) + normalise(r); +} + +void Alsc::doAlsc() +{ + Array2D &cr = tmpC_[0], &cb = tmpC_[1], &calTableR = tmpC_[2], + &calTableB = tmpC_[3], &calTableTmp = tmpC_[4]; + SparseArray &wr = tmpM_[0], &wb = tmpM_[1], &M = tmpM_[2]; + + /* + * Calculate our R/B ("Cr"/"Cb") colour statistics, and assess which are + * usable. + */ + calculateCrCb(statistics_, cr, cb, config_.minCount, config_.minG); + /* + * Fetch the new calibrations (if any) for this CT. Resample them in + * case the camera mode is not full-frame. + */ + getCalTable(ct_, config_.calibrationsCr, calTableTmp); + resampleCalTable(calTableTmp, cameraMode_, calTableR); + getCalTable(ct_, config_.calibrationsCb, calTableTmp); + resampleCalTable(calTableTmp, cameraMode_, calTableB); + /* + * You could print out the cal tables for this image here, if you're + * tuning the algorithm... + * Apply any calibration to the statistics, so the adaptive algorithm + * makes only the extra adjustments. + */ + applyCalTable(calTableR, cr); + applyCalTable(calTableB, cb); + /* Compute weights between zones. */ + computeW(cr, config_.sigmaCr, wr); + computeW(cb, config_.sigmaCb, wb); + /* Run Gauss-Seidel iterations over the resulting matrix, for R and B. */ + runMatrixIterations(cr, lambdaR_, wr, M, config_.omega, config_.nIter, + config_.threshold, config_.lambdaBound); + runMatrixIterations(cb, lambdaB_, wb, M, config_.omega, config_.nIter, + config_.threshold, config_.lambdaBound); + /* + * Fold the calibrated gains into our final lambda values. (Note that on + * the next run, we re-start with the lambda values that don't have the + * calibration gains included.) + */ + compensateLambdasForCal(calTableR, lambdaR_, asyncLambdaR_); + compensateLambdasForCal(calTableB, lambdaB_, asyncLambdaB_); + /* Fold in the luminance table at the appropriate strength. */ + addLuminanceToTables(asyncResults_, asyncLambdaR_, 1.0, + asyncLambdaB_, luminanceTable_, + config_.luminanceStrength); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Alsc(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/alsc.h b/src/ipa/rpi/controller/rpi/alsc.h new file mode 100644 index 00000000..0b6d9478 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/alsc.h @@ -0,0 +1,174 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * alsc.h - ALSC (auto lens shading correction) control algorithm + */ +#pragma once + +#include +#include +#include +#include +#include + +#include + +#include "../algorithm.h" +#include "../alsc_status.h" +#include "../statistics.h" + +namespace RPiController { + +/* Algorithm to generate automagic LSC (Lens Shading Correction) tables. */ + +/* + * The Array2D class is a very thin wrapper round std::vector so that it can + * be used in exactly the same way in the code but carries its correct width + * and height ("dimensions") with it. + */ + +template +class Array2D +{ +public: + using Size = libcamera::Size; + + const Size &dimensions() const { return dimensions_; } + + size_t size() const { return data_.size(); } + + const std::vector &data() const { return data_; } + + void resize(const Size &dims) + { + dimensions_ = dims; + data_.resize(dims.width * dims.height); + } + + void resize(const Size &dims, const T &value) + { + resize(dims); + std::fill(data_.begin(), data_.end(), value); + } + + T &operator[](int index) { return data_[index]; } + + const T &operator[](int index) const { return data_[index]; } + + T *ptr() { return data_.data(); } + + const T *ptr() const { return data_.data(); } + + auto begin() { return data_.begin(); } + auto end() { return data_.end(); } + +private: + Size dimensions_; + std::vector data_; +}; + +/* + * We'll use the term SparseArray for the large sparse matrices that are + * XY tall but have only 4 non-zero elements on each row. + */ + +template +using SparseArray = std::vector>; + +struct AlscCalibration { + double ct; + Array2D table; +}; + +struct AlscConfig { + /* Only repeat the ALSC calculation every "this many" frames */ + uint16_t framePeriod; + /* number of initial frames for which speed taken as 1.0 (maximum) */ + uint16_t startupFrames; + /* IIR filter speed applied to algorithm results */ + double speed; + double sigmaCr; + double sigmaCb; + double minCount; + uint16_t minG; + double omega; + uint32_t nIter; + Array2D luminanceLut; + double luminanceStrength; + std::vector calibrationsCr; + std::vector calibrationsCb; + double defaultCt; /* colour temperature if no metadata found */ + double threshold; /* iteration termination threshold */ + double lambdaBound; /* upper/lower bound for lambda from a value of 1 */ + libcamera::Size tableSize; +}; + +class Alsc : public Algorithm +{ +public: + Alsc(Controller *controller = NULL); + ~Alsc(); + char const *name() const override; + void initialise() override; + void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; + int read(const libcamera::YamlObject ¶ms) override; + void prepare(Metadata *imageMetadata) override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; + +private: + /* configuration is read-only, and available to both threads */ + AlscConfig config_; + bool firstTime_; + CameraMode cameraMode_; + Array2D luminanceTable_; + std::thread asyncThread_; + void asyncFunc(); /* asynchronous thread function */ + std::mutex mutex_; + /* condvar for async thread to wait on */ + std::condition_variable asyncSignal_; + /* condvar for synchronous thread to wait on */ + std::condition_variable syncSignal_; + /* for sync thread to check if async thread finished (requires mutex) */ + bool asyncFinished_; + /* for async thread to check if it's been told to run (requires mutex) */ + bool asyncStart_; + /* for async thread to check if it's been told to quit (requires mutex) */ + bool asyncAbort_; + + /* + * The following are only for the synchronous thread to use: + * for sync thread to note its has asked async thread to run + */ + bool asyncStarted_; + /* counts up to framePeriod before restarting the async thread */ + int framePhase_; + /* counts up to startupFrames */ + int frameCount_; + /* counts up to startupFrames for Process function */ + int frameCount2_; + std::array, 3> syncResults_; + std::array, 3> prevSyncResults_; + void waitForAysncThread(); + /* + * The following are for the asynchronous thread to use, though the main + * thread can set/reset them if the async thread is known to be idle: + */ + void restartAsync(StatisticsPtr &stats, Metadata *imageMetadata); + /* copy out the results from the async thread so that it can be restarted */ + void fetchAsyncResults(); + double ct_; + RgbyRegions statistics_; + std::array, 3> asyncResults_; + Array2D asyncLambdaR_; + Array2D asyncLambdaB_; + void doAlsc(); + Array2D lambdaR_; + Array2D lambdaB_; + + /* Temporaries for the computations */ + std::array, 5> tmpC_; + std::array, 3> tmpM_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/awb.cpp b/src/ipa/rpi/controller/rpi/awb.cpp new file mode 100644 index 00000000..ef3435d6 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/awb.cpp @@ -0,0 +1,734 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * awb.cpp - AWB control algorithm + */ + +#include +#include + +#include + +#include "../lux_status.h" + +#include "awb.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiAwb) + +#define NAME "rpi.awb" + +/* + * todo - the locking in this algorithm needs some tidying up as has been done + * elsewhere (ALSC and AGC). + */ + +int AwbMode::read(const libcamera::YamlObject ¶ms) +{ + auto value = params["lo"].get(); + if (!value) + return -EINVAL; + ctLo = *value; + + value = params["hi"].get(); + if (!value) + return -EINVAL; + ctHi = *value; + + return 0; +} + +int AwbPrior::read(const libcamera::YamlObject ¶ms) +{ + auto value = params["lux"].get(); + if (!value) + return -EINVAL; + lux = *value; + + return prior.read(params["prior"]); +} + +static int readCtCurve(Pwl &ctR, Pwl &ctB, const libcamera::YamlObject ¶ms) +{ + if (params.size() % 3) { + LOG(RPiAwb, Error) << "AwbConfig: incomplete CT curve entry"; + return -EINVAL; + } + + if (params.size() < 6) { + LOG(RPiAwb, Error) << "AwbConfig: insufficient points in CT curve"; + return -EINVAL; + } + + const auto &list = params.asList(); + + for (auto it = list.begin(); it != list.end(); it++) { + auto value = it->get(); + if (!value) + return -EINVAL; + double ct = *value; + + assert(it == list.begin() || ct != ctR.domain().end); + + value = (++it)->get(); + if (!value) + return -EINVAL; + ctR.append(ct, *value); + + value = (++it)->get(); + if (!value) + return -EINVAL; + ctB.append(ct, *value); + } + + return 0; +} + +int AwbConfig::read(const libcamera::YamlObject ¶ms) +{ + int ret; + + bayes = params["bayes"].get(1); + framePeriod = params["frame_period"].get(10); + startupFrames = params["startup_frames"].get(10); + convergenceFrames = params["convergence_frames"].get(3); + speed = params["speed"].get(0.05); + + if (params.contains("ct_curve")) { + ret = readCtCurve(ctR, ctB, params["ct_curve"]); + if (ret) + return ret; + /* We will want the inverse functions of these too. */ + ctRInverse = ctR.inverse(); + ctBInverse = ctB.inverse(); + } + + if (params.contains("priors")) { + for (const auto &p : params["priors"].asList()) { + AwbPrior prior; + ret = prior.read(p); + if (ret) + return ret; + if (!priors.empty() && prior.lux <= priors.back().lux) { + LOG(RPiAwb, Error) << "AwbConfig: Prior must be ordered in increasing lux value"; + return -EINVAL; + } + priors.push_back(prior); + } + if (priors.empty()) { + LOG(RPiAwb, Error) << "AwbConfig: no AWB priors configured"; + return ret; + } + } + if (params.contains("modes")) { + for (const auto &[key, value] : params["modes"].asDict()) { + ret = modes[key].read(value); + if (ret) + return ret; + if (defaultMode == nullptr) + defaultMode = &modes[key]; + } + if (defaultMode == nullptr) { + LOG(RPiAwb, Error) << "AwbConfig: no AWB modes configured"; + return -EINVAL; + } + } + + minPixels = params["min_pixels"].get(16.0); + minG = params["min_G"].get(32); + minRegions = params["min_regions"].get(10); + deltaLimit = params["delta_limit"].get(0.2); + coarseStep = params["coarse_step"].get(0.2); + transversePos = params["transverse_pos"].get(0.01); + transverseNeg = params["transverse_neg"].get(0.01); + if (transversePos <= 0 || transverseNeg <= 0) { + LOG(RPiAwb, Error) << "AwbConfig: transverse_pos/neg must be > 0"; + return -EINVAL; + } + + sensitivityR = params["sensitivity_r"].get(1.0); + sensitivityB = params["sensitivity_b"].get(1.0); + + if (bayes) { + if (ctR.empty() || ctB.empty() || priors.empty() || + defaultMode == nullptr) { + LOG(RPiAwb, Warning) + << "Bayesian AWB mis-configured - switch to Grey method"; + bayes = false; + } + } + fast = params[fast].get(bayes); /* default to fast for Bayesian, otherwise slow */ + whitepointR = params["whitepoint_r"].get(0.0); + whitepointB = params["whitepoint_b"].get(0.0); + if (bayes == false) + sensitivityR = sensitivityB = 1.0; /* nor do sensitivities make any sense */ + return 0; +} + +Awb::Awb(Controller *controller) + : AwbAlgorithm(controller) +{ + asyncAbort_ = asyncStart_ = asyncStarted_ = asyncFinished_ = false; + mode_ = nullptr; + manualR_ = manualB_ = 0.0; + asyncThread_ = std::thread(std::bind(&Awb::asyncFunc, this)); +} + +Awb::~Awb() +{ + { + std::lock_guard lock(mutex_); + asyncAbort_ = true; + } + asyncSignal_.notify_one(); + asyncThread_.join(); +} + +char const *Awb::name() const +{ + return NAME; +} + +int Awb::read(const libcamera::YamlObject ¶ms) +{ + return config_.read(params); +} + +void Awb::initialise() +{ + frameCount_ = framePhase_ = 0; + /* + * Put something sane into the status that we are filtering towards, + * just in case the first few frames don't have anything meaningful in + * them. + */ + if (!config_.ctR.empty() && !config_.ctB.empty()) { + syncResults_.temperatureK = config_.ctR.domain().clip(4000); + syncResults_.gainR = 1.0 / config_.ctR.eval(syncResults_.temperatureK); + syncResults_.gainG = 1.0; + syncResults_.gainB = 1.0 / config_.ctB.eval(syncResults_.temperatureK); + } else { + /* random values just to stop the world blowing up */ + syncResults_.temperatureK = 4500; + syncResults_.gainR = syncResults_.gainG = syncResults_.gainB = 1.0; + } + prevSyncResults_ = syncResults_; + asyncResults_ = syncResults_; +} + +void Awb::disableAuto() +{ + /* Freeze the most recent values, and treat them as manual gains */ + manualR_ = syncResults_.gainR = prevSyncResults_.gainR; + manualB_ = syncResults_.gainB = prevSyncResults_.gainB; + syncResults_.gainG = prevSyncResults_.gainG; + syncResults_.temperatureK = prevSyncResults_.temperatureK; +} + +void Awb::enableAuto() +{ + manualR_ = 0.0; + manualB_ = 0.0; +} + +unsigned int Awb::getConvergenceFrames() const +{ + /* + * If not in auto mode, there is no convergence + * to happen, so no need to drop any frames - return zero. + */ + if (!isAutoEnabled()) + return 0; + else + return config_.convergenceFrames; +} + +void Awb::setMode(std::string const &modeName) +{ + modeName_ = modeName; +} + +void Awb::setManualGains(double manualR, double manualB) +{ + /* If any of these are 0.0, we swich back to auto. */ + manualR_ = manualR; + manualB_ = manualB; + /* + * If not in auto mode, set these values into the syncResults which + * means that Prepare() will adopt them immediately. + */ + if (!isAutoEnabled()) { + syncResults_.gainR = prevSyncResults_.gainR = manualR_; + syncResults_.gainG = prevSyncResults_.gainG = 1.0; + syncResults_.gainB = prevSyncResults_.gainB = manualB_; + if (config_.bayes) { + /* Also estimate the best corresponding colour temperature from the curves. */ + double ctR = config_.ctRInverse.eval(config_.ctRInverse.domain().clip(1 / manualR_)); + double ctB = config_.ctBInverse.eval(config_.ctBInverse.domain().clip(1 / manualB_)); + prevSyncResults_.temperatureK = (ctR + ctB) / 2; + syncResults_.temperatureK = prevSyncResults_.temperatureK; + } + } +} + +void Awb::switchMode([[maybe_unused]] CameraMode const &cameraMode, + Metadata *metadata) +{ + /* Let other algorithms know the current white balance values. */ + metadata->set("awb.status", prevSyncResults_); +} + +bool Awb::isAutoEnabled() const +{ + return manualR_ == 0.0 || manualB_ == 0.0; +} + +void Awb::fetchAsyncResults() +{ + LOG(RPiAwb, Debug) << "Fetch AWB results"; + asyncFinished_ = false; + asyncStarted_ = false; + /* + * It's possible manual gains could be set even while the async + * thread was running, so only copy the results if still in auto mode. + */ + if (isAutoEnabled()) + syncResults_ = asyncResults_; +} + +void Awb::restartAsync(StatisticsPtr &stats, double lux) +{ + LOG(RPiAwb, Debug) << "Starting AWB calculation"; + /* this makes a new reference which belongs to the asynchronous thread */ + statistics_ = stats; + /* store the mode as it could technically change */ + auto m = config_.modes.find(modeName_); + mode_ = m != config_.modes.end() + ? &m->second + : (mode_ == nullptr ? config_.defaultMode : mode_); + lux_ = lux; + framePhase_ = 0; + asyncStarted_ = true; + size_t len = modeName_.copy(asyncResults_.mode, + sizeof(asyncResults_.mode) - 1); + asyncResults_.mode[len] = '\0'; + { + std::lock_guard lock(mutex_); + asyncStart_ = true; + } + asyncSignal_.notify_one(); +} + +void Awb::prepare(Metadata *imageMetadata) +{ + if (frameCount_ < (int)config_.startupFrames) + frameCount_++; + double speed = frameCount_ < (int)config_.startupFrames + ? 1.0 + : config_.speed; + LOG(RPiAwb, Debug) + << "frame_count " << frameCount_ << " speed " << speed; + { + std::unique_lock lock(mutex_); + if (asyncStarted_ && asyncFinished_) + fetchAsyncResults(); + } + /* Finally apply IIR filter to results and put into metadata. */ + memcpy(prevSyncResults_.mode, syncResults_.mode, + sizeof(prevSyncResults_.mode)); + prevSyncResults_.temperatureK = speed * syncResults_.temperatureK + + (1.0 - speed) * prevSyncResults_.temperatureK; + prevSyncResults_.gainR = speed * syncResults_.gainR + + (1.0 - speed) * prevSyncResults_.gainR; + prevSyncResults_.gainG = speed * syncResults_.gainG + + (1.0 - speed) * prevSyncResults_.gainG; + prevSyncResults_.gainB = speed * syncResults_.gainB + + (1.0 - speed) * prevSyncResults_.gainB; + imageMetadata->set("awb.status", prevSyncResults_); + LOG(RPiAwb, Debug) + << "Using AWB gains r " << prevSyncResults_.gainR << " g " + << prevSyncResults_.gainG << " b " + << prevSyncResults_.gainB; +} + +void Awb::process(StatisticsPtr &stats, Metadata *imageMetadata) +{ + /* Count frames since we last poked the async thread. */ + if (framePhase_ < (int)config_.framePeriod) + framePhase_++; + LOG(RPiAwb, Debug) << "frame_phase " << framePhase_; + /* We do not restart the async thread if we're not in auto mode. */ + if (isAutoEnabled() && + (framePhase_ >= (int)config_.framePeriod || + frameCount_ < (int)config_.startupFrames)) { + /* Update any settings and any image metadata that we need. */ + struct LuxStatus luxStatus = {}; + luxStatus.lux = 400; /* in case no metadata */ + if (imageMetadata->get("lux.status", luxStatus) != 0) + LOG(RPiAwb, Debug) << "No lux metadata found"; + LOG(RPiAwb, Debug) << "Awb lux value is " << luxStatus.lux; + + if (asyncStarted_ == false) + restartAsync(stats, luxStatus.lux); + } +} + +void Awb::asyncFunc() +{ + while (true) { + { + std::unique_lock lock(mutex_); + asyncSignal_.wait(lock, [&] { + return asyncStart_ || asyncAbort_; + }); + asyncStart_ = false; + if (asyncAbort_) + break; + } + doAwb(); + { + std::lock_guard lock(mutex_); + asyncFinished_ = true; + } + syncSignal_.notify_one(); + } +} + +static void generateStats(std::vector &zones, + RgbyRegions &stats, double minPixels, + double minG) +{ + for (auto const ®ion : stats) { + Awb::RGB zone; + if (region.counted >= minPixels) { + zone.G = region.val.gSum / region.counted; + if (zone.G >= minG) { + zone.R = region.val.rSum / region.counted; + zone.B = region.val.bSum / region.counted; + zones.push_back(zone); + } + } + } +} + +void Awb::prepareStats() +{ + zones_.clear(); + /* + * LSC has already been applied to the stats in this pipeline, so stop + * any LSC compensation. We also ignore config_.fast in this version. + */ + generateStats(zones_, statistics_->awbRegions, config_.minPixels, + config_.minG); + /* + * apply sensitivities, so values appear to come from our "canonical" + * sensor. + */ + for (auto &zone : zones_) { + zone.R *= config_.sensitivityR; + zone.B *= config_.sensitivityB; + } +} + +double Awb::computeDelta2Sum(double gainR, double gainB) +{ + /* + * Compute the sum of the squared colour error (non-greyness) as it + * appears in the log likelihood equation. + */ + double delta2Sum = 0; + for (auto &z : zones_) { + double deltaR = gainR * z.R - 1 - config_.whitepointR; + double deltaB = gainB * z.B - 1 - config_.whitepointB; + double delta2 = deltaR * deltaR + deltaB * deltaB; + /* LOG(RPiAwb, Debug) << "deltaR " << deltaR << " deltaB " << deltaB << " delta2 " << delta2; */ + delta2 = std::min(delta2, config_.deltaLimit); + delta2Sum += delta2; + } + return delta2Sum; +} + +Pwl Awb::interpolatePrior() +{ + /* + * Interpolate the prior log likelihood function for our current lux + * value. + */ + if (lux_ <= config_.priors.front().lux) + return config_.priors.front().prior; + else if (lux_ >= config_.priors.back().lux) + return config_.priors.back().prior; + else { + int idx = 0; + /* find which two we lie between */ + while (config_.priors[idx + 1].lux < lux_) + idx++; + double lux0 = config_.priors[idx].lux, + lux1 = config_.priors[idx + 1].lux; + return Pwl::combine(config_.priors[idx].prior, + config_.priors[idx + 1].prior, + [&](double /*x*/, double y0, double y1) { + return y0 + (y1 - y0) * + (lux_ - lux0) / (lux1 - lux0); + }); + } +} + +static double interpolateQuadatric(Pwl::Point const &a, Pwl::Point const &b, + Pwl::Point const &c) +{ + /* + * Given 3 points on a curve, find the extremum of the function in that + * interval by fitting a quadratic. + */ + const double eps = 1e-3; + Pwl::Point ca = c - a, ba = b - a; + double denominator = 2 * (ba.y * ca.x - ca.y * ba.x); + if (abs(denominator) > eps) { + double numerator = ba.y * ca.x * ca.x - ca.y * ba.x * ba.x; + double result = numerator / denominator + a.x; + return std::max(a.x, std::min(c.x, result)); + } + /* has degenerated to straight line segment */ + return a.y < c.y - eps ? a.x : (c.y < a.y - eps ? c.x : b.x); +} + +double Awb::coarseSearch(Pwl const &prior) +{ + points_.clear(); /* assume doesn't deallocate memory */ + size_t bestPoint = 0; + double t = mode_->ctLo; + int spanR = 0, spanB = 0; + /* Step down the CT curve evaluating log likelihood. */ + while (true) { + double r = config_.ctR.eval(t, &spanR); + double b = config_.ctB.eval(t, &spanB); + double gainR = 1 / r, gainB = 1 / b; + double delta2Sum = computeDelta2Sum(gainR, gainB); + double priorLogLikelihood = prior.eval(prior.domain().clip(t)); + double finalLogLikelihood = delta2Sum - priorLogLikelihood; + LOG(RPiAwb, Debug) + << "t: " << t << " gain R " << gainR << " gain B " + << gainB << " delta2_sum " << delta2Sum + << " prior " << priorLogLikelihood << " final " + << finalLogLikelihood; + points_.push_back(Pwl::Point(t, finalLogLikelihood)); + if (points_.back().y < points_[bestPoint].y) + bestPoint = points_.size() - 1; + if (t == mode_->ctHi) + break; + /* for even steps along the r/b curve scale them by the current t */ + t = std::min(t + t / 10 * config_.coarseStep, mode_->ctHi); + } + t = points_[bestPoint].x; + LOG(RPiAwb, Debug) << "Coarse search found CT " << t; + /* + * We have the best point of the search, but refine it with a quadratic + * interpolation around its neighbours. + */ + if (points_.size() > 2) { + unsigned long bp = std::min(bestPoint, points_.size() - 2); + bestPoint = std::max(1UL, bp); + t = interpolateQuadatric(points_[bestPoint - 1], + points_[bestPoint], + points_[bestPoint + 1]); + LOG(RPiAwb, Debug) + << "After quadratic refinement, coarse search has CT " + << t; + } + return t; +} + +void Awb::fineSearch(double &t, double &r, double &b, Pwl const &prior) +{ + int spanR = -1, spanB = -1; + config_.ctR.eval(t, &spanR); + config_.ctB.eval(t, &spanB); + double step = t / 10 * config_.coarseStep * 0.1; + int nsteps = 5; + double rDiff = config_.ctR.eval(t + nsteps * step, &spanR) - + config_.ctR.eval(t - nsteps * step, &spanR); + double bDiff = config_.ctB.eval(t + nsteps * step, &spanB) - + config_.ctB.eval(t - nsteps * step, &spanB); + Pwl::Point transverse(bDiff, -rDiff); + if (transverse.len2() < 1e-6) + return; + /* + * unit vector orthogonal to the b vs. r function (pointing outwards + * with r and b increasing) + */ + transverse = transverse / transverse.len(); + double bestLogLikelihood = 0, bestT = 0, bestR = 0, bestB = 0; + double transverseRange = config_.transverseNeg + config_.transversePos; + const int maxNumDeltas = 12; + /* a transverse step approximately every 0.01 r/b units */ + int numDeltas = floor(transverseRange * 100 + 0.5) + 1; + numDeltas = numDeltas < 3 ? 3 : (numDeltas > maxNumDeltas ? maxNumDeltas : numDeltas); + /* + * Step down CT curve. March a bit further if the transverse range is + * large. + */ + nsteps += numDeltas; + for (int i = -nsteps; i <= nsteps; i++) { + double tTest = t + i * step; + double priorLogLikelihood = + prior.eval(prior.domain().clip(tTest)); + double rCurve = config_.ctR.eval(tTest, &spanR); + double bCurve = config_.ctB.eval(tTest, &spanB); + /* x will be distance off the curve, y the log likelihood there */ + Pwl::Point points[maxNumDeltas]; + int bestPoint = 0; + /* Take some measurements transversely *off* the CT curve. */ + for (int j = 0; j < numDeltas; j++) { + points[j].x = -config_.transverseNeg + + (transverseRange * j) / (numDeltas - 1); + Pwl::Point rbTest = Pwl::Point(rCurve, bCurve) + + transverse * points[j].x; + double rTest = rbTest.x, bTest = rbTest.y; + double gainR = 1 / rTest, gainB = 1 / bTest; + double delta2Sum = computeDelta2Sum(gainR, gainB); + points[j].y = delta2Sum - priorLogLikelihood; + LOG(RPiAwb, Debug) + << "At t " << tTest << " r " << rTest << " b " + << bTest << ": " << points[j].y; + if (points[j].y < points[bestPoint].y) + bestPoint = j; + } + /* + * We have NUM_DELTAS points transversely across the CT curve, + * now let's do a quadratic interpolation for the best result. + */ + bestPoint = std::max(1, std::min(bestPoint, numDeltas - 2)); + Pwl::Point rbTest = Pwl::Point(rCurve, bCurve) + + transverse * interpolateQuadatric(points[bestPoint - 1], + points[bestPoint], + points[bestPoint + 1]); + double rTest = rbTest.x, bTest = rbTest.y; + double gainR = 1 / rTest, gainB = 1 / bTest; + double delta2Sum = computeDelta2Sum(gainR, gainB); + double finalLogLikelihood = delta2Sum - priorLogLikelihood; + LOG(RPiAwb, Debug) + << "Finally " + << tTest << " r " << rTest << " b " << bTest << ": " + << finalLogLikelihood + << (finalLogLikelihood < bestLogLikelihood ? " BEST" : ""); + if (bestT == 0 || finalLogLikelihood < bestLogLikelihood) + bestLogLikelihood = finalLogLikelihood, + bestT = tTest, bestR = rTest, bestB = bTest; + } + t = bestT, r = bestR, b = bestB; + LOG(RPiAwb, Debug) + << "Fine search found t " << t << " r " << r << " b " << b; +} + +void Awb::awbBayes() +{ + /* + * May as well divide out G to save computeDelta2Sum from doing it over + * and over. + */ + for (auto &z : zones_) + z.R = z.R / (z.G + 1), z.B = z.B / (z.G + 1); + /* + * Get the current prior, and scale according to how many zones are + * valid... not entirely sure about this. + */ + Pwl prior = interpolatePrior(); + prior *= zones_.size() / (double)(statistics_->awbRegions.numRegions()); + prior.map([](double x, double y) { + LOG(RPiAwb, Debug) << "(" << x << "," << y << ")"; + }); + double t = coarseSearch(prior); + double r = config_.ctR.eval(t); + double b = config_.ctB.eval(t); + LOG(RPiAwb, Debug) + << "After coarse search: r " << r << " b " << b << " (gains r " + << 1 / r << " b " << 1 / b << ")"; + /* + * Not entirely sure how to handle the fine search yet. Mostly the + * estimated CT is already good enough, but the fine search allows us to + * wander transverely off the CT curve. Under some illuminants, where + * there may be more or less green light, this may prove beneficial, + * though I probably need more real datasets before deciding exactly how + * this should be controlled and tuned. + */ + fineSearch(t, r, b, prior); + LOG(RPiAwb, Debug) + << "After fine search: r " << r << " b " << b << " (gains r " + << 1 / r << " b " << 1 / b << ")"; + /* + * Write results out for the main thread to pick up. Remember to adjust + * the gains from the ones that the "canonical sensor" would require to + * the ones needed by *this* sensor. + */ + asyncResults_.temperatureK = t; + asyncResults_.gainR = 1.0 / r * config_.sensitivityR; + asyncResults_.gainG = 1.0; + asyncResults_.gainB = 1.0 / b * config_.sensitivityB; +} + +void Awb::awbGrey() +{ + LOG(RPiAwb, Debug) << "Grey world AWB"; + /* + * Make a separate list of the derivatives for each of red and blue, so + * that we can sort them to exclude the extreme gains. We could + * consider some variations, such as normalising all the zones first, or + * doing an L2 average etc. + */ + std::vector &derivsR(zones_); + std::vector derivsB(derivsR); + std::sort(derivsR.begin(), derivsR.end(), + [](RGB const &a, RGB const &b) { + return a.G * b.R < b.G * a.R; + }); + std::sort(derivsB.begin(), derivsB.end(), + [](RGB const &a, RGB const &b) { + return a.G * b.B < b.G * a.B; + }); + /* Average the middle half of the values. */ + int discard = derivsR.size() / 4; + RGB sumR(0, 0, 0), sumB(0, 0, 0); + for (auto ri = derivsR.begin() + discard, + bi = derivsB.begin() + discard; + ri != derivsR.end() - discard; ri++, bi++) + sumR += *ri, sumB += *bi; + double gainR = sumR.G / (sumR.R + 1), + gainB = sumB.G / (sumB.B + 1); + asyncResults_.temperatureK = 4500; /* don't know what it is */ + asyncResults_.gainR = gainR; + asyncResults_.gainG = 1.0; + asyncResults_.gainB = gainB; +} + +void Awb::doAwb() +{ + prepareStats(); + LOG(RPiAwb, Debug) << "Valid zones: " << zones_.size(); + if (zones_.size() > config_.minRegions) { + if (config_.bayes) + awbBayes(); + else + awbGrey(); + LOG(RPiAwb, Debug) + << "CT found is " + << asyncResults_.temperatureK + << " with gains r " << asyncResults_.gainR + << " and b " << asyncResults_.gainB; + } + /* + * we're done with these; we may as well relinquish our hold on the + * pointer. + */ + statistics_.reset(); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Awb(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/awb.h b/src/ipa/rpi/controller/rpi/awb.h new file mode 100644 index 00000000..e7d49cd8 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/awb.h @@ -0,0 +1,191 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * awb.h - AWB control algorithm + */ +#pragma once + +#include +#include +#include + +#include "../awb_algorithm.h" +#include "../pwl.h" +#include "../awb_status.h" +#include "../statistics.h" + +namespace RPiController { + +/* Control algorithm to perform AWB calculations. */ + +struct AwbMode { + int read(const libcamera::YamlObject ¶ms); + double ctLo; /* low CT value for search */ + double ctHi; /* high CT value for search */ +}; + +struct AwbPrior { + int read(const libcamera::YamlObject ¶ms); + double lux; /* lux level */ + Pwl prior; /* maps CT to prior log likelihood for this lux level */ +}; + +struct AwbConfig { + AwbConfig() : defaultMode(nullptr) {} + int read(const libcamera::YamlObject ¶ms); + /* Only repeat the AWB calculation every "this many" frames */ + uint16_t framePeriod; + /* number of initial frames for which speed taken as 1.0 (maximum) */ + uint16_t startupFrames; + unsigned int convergenceFrames; /* approx number of frames to converge */ + double speed; /* IIR filter speed applied to algorithm results */ + bool fast; /* "fast" mode uses a 16x16 rather than 32x32 grid */ + Pwl ctR; /* function maps CT to r (= R/G) */ + Pwl ctB; /* function maps CT to b (= B/G) */ + Pwl ctRInverse; /* inverse of ctR */ + Pwl ctBInverse; /* inverse of ctB */ + /* table of illuminant priors at different lux levels */ + std::vector priors; + /* AWB "modes" (determines the search range) */ + std::map modes; + AwbMode *defaultMode; /* mode used if no mode selected */ + /* + * minimum proportion of pixels counted within AWB region for it to be + * "useful" + */ + double minPixels; + /* minimum G value of those pixels, to be regarded a "useful" */ + uint16_t minG; + /* + * number of AWB regions that must be "useful" in order to do the AWB + * calculation + */ + uint32_t minRegions; + /* clamp on colour error term (so as not to penalise non-grey excessively) */ + double deltaLimit; + /* step size control in coarse search */ + double coarseStep; + /* how far to wander off CT curve towards "more purple" */ + double transversePos; + /* how far to wander off CT curve towards "more green" */ + double transverseNeg; + /* + * red sensitivity ratio (set to canonical sensor's R/G divided by this + * sensor's R/G) + */ + double sensitivityR; + /* + * blue sensitivity ratio (set to canonical sensor's B/G divided by this + * sensor's B/G) + */ + double sensitivityB; + /* The whitepoint (which we normally "aim" for) can be moved. */ + double whitepointR; + double whitepointB; + bool bayes; /* use Bayesian algorithm */ +}; + +class Awb : public AwbAlgorithm +{ +public: + Awb(Controller *controller = NULL); + ~Awb(); + char const *name() const override; + void initialise() override; + int read(const libcamera::YamlObject ¶ms) override; + unsigned int getConvergenceFrames() const override; + void setMode(std::string const &name) override; + void setManualGains(double manualR, double manualB) override; + void enableAuto() override; + void disableAuto() override; + void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; + void prepare(Metadata *imageMetadata) override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; + struct RGB { + RGB(double r = 0, double g = 0, double b = 0) + : R(r), G(g), B(b) + { + } + double R, G, B; + RGB &operator+=(RGB const &other) + { + R += other.R, G += other.G, B += other.B; + return *this; + } + }; + +private: + bool isAutoEnabled() const; + /* configuration is read-only, and available to both threads */ + AwbConfig config_; + std::thread asyncThread_; + void asyncFunc(); /* asynchronous thread function */ + std::mutex mutex_; + /* condvar for async thread to wait on */ + std::condition_variable asyncSignal_; + /* condvar for synchronous thread to wait on */ + std::condition_variable syncSignal_; + /* for sync thread to check if async thread finished (requires mutex) */ + bool asyncFinished_; + /* for async thread to check if it's been told to run (requires mutex) */ + bool asyncStart_; + /* for async thread to check if it's been told to quit (requires mutex) */ + bool asyncAbort_; + + /* + * The following are only for the synchronous thread to use: + * for sync thread to note its has asked async thread to run + */ + bool asyncStarted_; + /* counts up to framePeriod before restarting the async thread */ + int framePhase_; + int frameCount_; /* counts up to startup_frames */ + AwbStatus syncResults_; + AwbStatus prevSyncResults_; + std::string modeName_; + /* + * The following are for the asynchronous thread to use, though the main + * thread can set/reset them if the async thread is known to be idle: + */ + void restartAsync(StatisticsPtr &stats, double lux); + /* copy out the results from the async thread so that it can be restarted */ + void fetchAsyncResults(); + StatisticsPtr statistics_; + AwbMode *mode_; + double lux_; + AwbStatus asyncResults_; + void doAwb(); + void awbBayes(); + void awbGrey(); + void prepareStats(); + double computeDelta2Sum(double gainR, double gainB); + Pwl interpolatePrior(); + double coarseSearch(Pwl const &prior); + void fineSearch(double &t, double &r, double &b, Pwl const &prior); + std::vector zones_; + std::vector points_; + /* manual r setting */ + double manualR_; + /* manual b setting */ + double manualB_; +}; + +static inline Awb::RGB operator+(Awb::RGB const &a, Awb::RGB const &b) +{ + return Awb::RGB(a.R + b.R, a.G + b.G, a.B + b.B); +} +static inline Awb::RGB operator-(Awb::RGB const &a, Awb::RGB const &b) +{ + return Awb::RGB(a.R - b.R, a.G - b.G, a.B - b.B); +} +static inline Awb::RGB operator*(double d, Awb::RGB const &rgb) +{ + return Awb::RGB(d * rgb.R, d * rgb.G, d * rgb.B); +} +static inline Awb::RGB operator*(Awb::RGB const &rgb, double d) +{ + return d * rgb; +} + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/black_level.cpp b/src/ipa/rpi/controller/rpi/black_level.cpp new file mode 100644 index 00000000..85baec3f --- /dev/null +++ b/src/ipa/rpi/controller/rpi/black_level.cpp @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * black_level.cpp - black level control algorithm + */ + +#include +#include + +#include + +#include "../black_level_status.h" + +#include "black_level.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiBlackLevel) + +#define NAME "rpi.black_level" + +BlackLevel::BlackLevel(Controller *controller) + : Algorithm(controller) +{ +} + +char const *BlackLevel::name() const +{ + return NAME; +} + +int BlackLevel::read(const libcamera::YamlObject ¶ms) +{ + /* 64 in 10 bits scaled to 16 bits */ + uint16_t blackLevel = params["black_level"].get(4096); + blackLevelR_ = params["black_level_r"].get(blackLevel); + blackLevelG_ = params["black_level_g"].get(blackLevel); + blackLevelB_ = params["black_level_b"].get(blackLevel); + LOG(RPiBlackLevel, Debug) + << " Read black levels red " << blackLevelR_ + << " green " << blackLevelG_ + << " blue " << blackLevelB_; + return 0; +} + +void BlackLevel::prepare(Metadata *imageMetadata) +{ + /* + * Possibly we should think about doing this in a switchMode or + * something? + */ + struct BlackLevelStatus status; + status.blackLevelR = blackLevelR_; + status.blackLevelG = blackLevelG_; + status.blackLevelB = blackLevelB_; + imageMetadata->set("black_level.status", status); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return new BlackLevel(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/black_level.h b/src/ipa/rpi/controller/rpi/black_level.h new file mode 100644 index 00000000..2403f7f7 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/black_level.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * black_level.h - black level control algorithm + */ +#pragma once + +#include "../algorithm.h" +#include "../black_level_status.h" + +/* This is our implementation of the "black level algorithm". */ + +namespace RPiController { + +class BlackLevel : public Algorithm +{ +public: + BlackLevel(Controller *controller); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void prepare(Metadata *imageMetadata) override; + +private: + double blackLevelR_; + double blackLevelG_; + double blackLevelB_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/ccm.cpp b/src/ipa/rpi/controller/rpi/ccm.cpp new file mode 100644 index 00000000..2e2e6664 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/ccm.cpp @@ -0,0 +1,199 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * ccm.cpp - CCM (colour correction matrix) control algorithm + */ + +#include + +#include "../awb_status.h" +#include "../ccm_status.h" +#include "../lux_status.h" +#include "../metadata.h" + +#include "ccm.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiCcm) + +/* + * This algorithm selects a CCM (Colour Correction Matrix) according to the + * colour temperature estimated by AWB (interpolating between known matricies as + * necessary). Additionally the amount of colour saturation can be controlled + * both according to the current estimated lux level and according to a + * saturation setting that is exposed to applications. + */ + +#define NAME "rpi.ccm" + +Matrix::Matrix() +{ + memset(m, 0, sizeof(m)); +} +Matrix::Matrix(double m0, double m1, double m2, double m3, double m4, double m5, + double m6, double m7, double m8) +{ + m[0][0] = m0, m[0][1] = m1, m[0][2] = m2, m[1][0] = m3, m[1][1] = m4, + m[1][2] = m5, m[2][0] = m6, m[2][1] = m7, m[2][2] = m8; +} +int Matrix::read(const libcamera::YamlObject ¶ms) +{ + double *ptr = (double *)m; + + if (params.size() != 9) { + LOG(RPiCcm, Error) << "Wrong number of values in CCM"; + return -EINVAL; + } + + for (const auto ¶m : params.asList()) { + auto value = param.get(); + if (!value) + return -EINVAL; + *ptr++ = *value; + } + + return 0; +} + +Ccm::Ccm(Controller *controller) + : CcmAlgorithm(controller), saturation_(1.0) {} + +char const *Ccm::name() const +{ + return NAME; +} + +int Ccm::read(const libcamera::YamlObject ¶ms) +{ + int ret; + + if (params.contains("saturation")) { + ret = config_.saturation.read(params["saturation"]); + if (ret) + return ret; + } + + for (auto &p : params["ccms"].asList()) { + auto value = p["ct"].get(); + if (!value) + return -EINVAL; + + CtCcm ctCcm; + ctCcm.ct = *value; + ret = ctCcm.ccm.read(p["ccm"]); + if (ret) + return ret; + + if (!config_.ccms.empty() && ctCcm.ct <= config_.ccms.back().ct) { + LOG(RPiCcm, Error) + << "CCM not in increasing colour temperature order"; + return -EINVAL; + } + + config_.ccms.push_back(std::move(ctCcm)); + } + + if (config_.ccms.empty()) { + LOG(RPiCcm, Error) << "No CCMs specified"; + return -EINVAL; + } + + return 0; +} + +void Ccm::setSaturation(double saturation) +{ + saturation_ = saturation; +} + +void Ccm::initialise() +{ +} + +template +static bool getLocked(Metadata *metadata, std::string const &tag, T &value) +{ + T *ptr = metadata->getLocked(tag); + if (ptr == nullptr) + return false; + value = *ptr; + return true; +} + +Matrix calculateCcm(std::vector const &ccms, double ct) +{ + if (ct <= ccms.front().ct) + return ccms.front().ccm; + else if (ct >= ccms.back().ct) + return ccms.back().ccm; + else { + int i = 0; + for (; ct > ccms[i].ct; i++) + ; + double lambda = + (ct - ccms[i - 1].ct) / (ccms[i].ct - ccms[i - 1].ct); + return lambda * ccms[i].ccm + (1.0 - lambda) * ccms[i - 1].ccm; + } +} + +Matrix applySaturation(Matrix const &ccm, double saturation) +{ + Matrix RGB2Y(0.299, 0.587, 0.114, -0.169, -0.331, 0.500, 0.500, -0.419, + -0.081); + Matrix Y2RGB(1.000, 0.000, 1.402, 1.000, -0.345, -0.714, 1.000, 1.771, + 0.000); + Matrix S(1, 0, 0, 0, saturation, 0, 0, 0, saturation); + return Y2RGB * S * RGB2Y * ccm; +} + +void Ccm::prepare(Metadata *imageMetadata) +{ + bool awbOk = false, luxOk = false; + struct AwbStatus awb = {}; + awb.temperatureK = 4000; /* in case no metadata */ + struct LuxStatus lux = {}; + lux.lux = 400; /* in case no metadata */ + { + /* grab mutex just once to get everything */ + std::lock_guard lock(*imageMetadata); + awbOk = getLocked(imageMetadata, "awb.status", awb); + luxOk = getLocked(imageMetadata, "lux.status", lux); + } + if (!awbOk) + LOG(RPiCcm, Warning) << "no colour temperature found"; + if (!luxOk) + LOG(RPiCcm, Warning) << "no lux value found"; + Matrix ccm = calculateCcm(config_.ccms, awb.temperatureK); + double saturation = saturation_; + struct CcmStatus ccmStatus; + ccmStatus.saturation = saturation; + if (!config_.saturation.empty()) + saturation *= config_.saturation.eval( + config_.saturation.domain().clip(lux.lux)); + ccm = applySaturation(ccm, saturation); + for (int j = 0; j < 3; j++) + for (int i = 0; i < 3; i++) + ccmStatus.matrix[j * 3 + i] = + std::max(-8.0, std::min(7.9999, ccm.m[j][i])); + LOG(RPiCcm, Debug) + << "colour temperature " << awb.temperatureK << "K"; + LOG(RPiCcm, Debug) + << "CCM: " << ccmStatus.matrix[0] << " " << ccmStatus.matrix[1] + << " " << ccmStatus.matrix[2] << " " + << ccmStatus.matrix[3] << " " << ccmStatus.matrix[4] + << " " << ccmStatus.matrix[5] << " " + << ccmStatus.matrix[6] << " " << ccmStatus.matrix[7] + << " " << ccmStatus.matrix[8]; + imageMetadata->set("ccm.status", ccmStatus); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Ccm(controller); + ; +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/ccm.h b/src/ipa/rpi/controller/rpi/ccm.h new file mode 100644 index 00000000..286d0b33 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/ccm.h @@ -0,0 +1,75 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * ccm.h - CCM (colour correction matrix) control algorithm + */ +#pragma once + +#include + +#include "../ccm_algorithm.h" +#include "../pwl.h" + +namespace RPiController { + +/* Algorithm to calculate colour matrix. Should be placed after AWB. */ + +struct Matrix { + Matrix(double m0, double m1, double m2, double m3, double m4, double m5, + double m6, double m7, double m8); + Matrix(); + double m[3][3]; + int read(const libcamera::YamlObject ¶ms); +}; +static inline Matrix operator*(double d, Matrix const &m) +{ + return Matrix(m.m[0][0] * d, m.m[0][1] * d, m.m[0][2] * d, + m.m[1][0] * d, m.m[1][1] * d, m.m[1][2] * d, + m.m[2][0] * d, m.m[2][1] * d, m.m[2][2] * d); +} +static inline Matrix operator*(Matrix const &m1, Matrix const &m2) +{ + Matrix m; + for (int i = 0; i < 3; i++) + for (int j = 0; j < 3; j++) + m.m[i][j] = m1.m[i][0] * m2.m[0][j] + + m1.m[i][1] * m2.m[1][j] + + m1.m[i][2] * m2.m[2][j]; + return m; +} +static inline Matrix operator+(Matrix const &m1, Matrix const &m2) +{ + Matrix m; + for (int i = 0; i < 3; i++) + for (int j = 0; j < 3; j++) + m.m[i][j] = m1.m[i][j] + m2.m[i][j]; + return m; +} + +struct CtCcm { + double ct; + Matrix ccm; +}; + +struct CcmConfig { + std::vector ccms; + Pwl saturation; +}; + +class Ccm : public CcmAlgorithm +{ +public: + Ccm(Controller *controller = NULL); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void setSaturation(double saturation) override; + void initialise() override; + void prepare(Metadata *imageMetadata) override; + +private: + CcmConfig config_; + double saturation_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/contrast.cpp b/src/ipa/rpi/controller/rpi/contrast.cpp new file mode 100644 index 00000000..bee1eadd --- /dev/null +++ b/src/ipa/rpi/controller/rpi/contrast.cpp @@ -0,0 +1,181 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * contrast.cpp - contrast (gamma) control algorithm + */ +#include + +#include + +#include "../contrast_status.h" +#include "../histogram.h" + +#include "contrast.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiContrast) + +/* + * This is a very simple control algorithm which simply retrieves the results of + * AGC and AWB via their "status" metadata, and applies digital gain to the + * colour channels in accordance with those instructions. We take care never to + * apply less than unity gains, as that would cause fully saturated pixels to go + * off-white. + */ + +#define NAME "rpi.contrast" + +Contrast::Contrast(Controller *controller) + : ContrastAlgorithm(controller), brightness_(0.0), contrast_(1.0) +{ +} + +char const *Contrast::name() const +{ + return NAME; +} + +int Contrast::read(const libcamera::YamlObject ¶ms) +{ + // enable adaptive enhancement by default + config_.ceEnable = params["ce_enable"].get(1); + // the point near the bottom of the histogram to move + config_.loHistogram = params["lo_histogram"].get(0.01); + // where in the range to try and move it to + config_.loLevel = params["lo_level"].get(0.015); + // but don't move by more than this + config_.loMax = params["lo_max"].get(500); + // equivalent values for the top of the histogram... + config_.hiHistogram = params["hi_histogram"].get(0.95); + config_.hiLevel = params["hi_level"].get(0.95); + config_.hiMax = params["hi_max"].get(2000); + return config_.gammaCurve.read(params["gamma_curve"]); +} + +void Contrast::setBrightness(double brightness) +{ + brightness_ = brightness; +} + +void Contrast::setContrast(double contrast) +{ + contrast_ = contrast; +} + +void Contrast::initialise() +{ + /* + * Fill in some default values as Prepare will run before Process gets + * called. + */ + status_.brightness = brightness_; + status_.contrast = contrast_; + status_.gammaCurve = config_.gammaCurve; +} + +void Contrast::prepare(Metadata *imageMetadata) +{ + imageMetadata->set("contrast.status", status_); +} + +Pwl computeStretchCurve(Histogram const &histogram, + ContrastConfig const &config) +{ + Pwl enhance; + enhance.append(0, 0); + /* + * If the start of the histogram is rather empty, try to pull it down a + * bit. + */ + double histLo = histogram.quantile(config.loHistogram) * + (65536 / histogram.bins()); + double levelLo = config.loLevel * 65536; + LOG(RPiContrast, Debug) + << "Move histogram point " << histLo << " to " << levelLo; + histLo = std::max(levelLo, + std::min(65535.0, std::min(histLo, levelLo + config.loMax))); + LOG(RPiContrast, Debug) + << "Final values " << histLo << " -> " << levelLo; + enhance.append(histLo, levelLo); + /* + * Keep the mid-point (median) in the same place, though, to limit the + * apparent amount of global brightness shift. + */ + double mid = histogram.quantile(0.5) * (65536 / histogram.bins()); + enhance.append(mid, mid); + + /* + * If the top to the histogram is empty, try to pull the pixel values + * there up. + */ + double histHi = histogram.quantile(config.hiHistogram) * + (65536 / histogram.bins()); + double levelHi = config.hiLevel * 65536; + LOG(RPiContrast, Debug) + << "Move histogram point " << histHi << " to " << levelHi; + histHi = std::min(levelHi, + std::max(0.0, std::max(histHi, levelHi - config.hiMax))); + LOG(RPiContrast, Debug) + << "Final values " << histHi << " -> " << levelHi; + enhance.append(histHi, levelHi); + enhance.append(65535, 65535); + return enhance; +} + +Pwl applyManualContrast(Pwl const &gammaCurve, double brightness, + double contrast) +{ + Pwl newGammaCurve; + LOG(RPiContrast, Debug) + << "Manual brightness " << brightness << " contrast " << contrast; + gammaCurve.map([&](double x, double y) { + newGammaCurve.append( + x, std::max(0.0, std::min(65535.0, + (y - 32768) * contrast + + 32768 + brightness))); + }); + return newGammaCurve; +} + +void Contrast::process(StatisticsPtr &stats, + [[maybe_unused]] Metadata *imageMetadata) +{ + Histogram &histogram = stats->yHist; + /* + * We look at the histogram and adjust the gamma curve in the following + * ways: 1. Adjust the gamma curve so as to pull the start of the + * histogram down, and possibly push the end up. + */ + Pwl gammaCurve = config_.gammaCurve; + if (config_.ceEnable) { + if (config_.loMax != 0 || config_.hiMax != 0) + gammaCurve = computeStretchCurve(histogram, config_).compose(gammaCurve); + /* + * We could apply other adjustments (e.g. partial equalisation) + * based on the histogram...? + */ + } + /* + * 2. Finally apply any manually selected brightness/contrast + * adjustment. + */ + if (brightness_ != 0 || contrast_ != 1.0) + gammaCurve = applyManualContrast(gammaCurve, brightness_, contrast_); + /* + * And fill in the status for output. Use more points towards the bottom + * of the curve. + */ + status_.brightness = brightness_; + status_.contrast = contrast_; + status_.gammaCurve = std::move(gammaCurve); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Contrast(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/contrast.h b/src/ipa/rpi/controller/rpi/contrast.h new file mode 100644 index 00000000..9c81277a --- /dev/null +++ b/src/ipa/rpi/controller/rpi/contrast.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * contrast.h - contrast (gamma) control algorithm + */ +#pragma once + +#include + +#include "../contrast_algorithm.h" +#include "../pwl.h" + +namespace RPiController { + +/* + * Back End algorithm to appaly correct digital gain. Should be placed after + * Back End AWB. + */ + +struct ContrastConfig { + bool ceEnable; + double loHistogram; + double loLevel; + double loMax; + double hiHistogram; + double hiLevel; + double hiMax; + Pwl gammaCurve; +}; + +class Contrast : public ContrastAlgorithm +{ +public: + Contrast(Controller *controller = NULL); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void setBrightness(double brightness) override; + void setContrast(double contrast) override; + void initialise() override; + void prepare(Metadata *imageMetadata) override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; + +private: + ContrastConfig config_; + double brightness_; + double contrast_; + ContrastStatus status_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/dpc.cpp b/src/ipa/rpi/controller/rpi/dpc.cpp new file mode 100644 index 00000000..be3871df --- /dev/null +++ b/src/ipa/rpi/controller/rpi/dpc.cpp @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * dpc.cpp - DPC (defective pixel correction) control algorithm + */ + +#include + +#include "dpc.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiDpc) + +/* + * We use the lux status so that we can apply stronger settings in darkness (if + * necessary). + */ + +#define NAME "rpi.dpc" + +Dpc::Dpc(Controller *controller) + : Algorithm(controller) +{ +} + +char const *Dpc::name() const +{ + return NAME; +} + +int Dpc::read(const libcamera::YamlObject ¶ms) +{ + config_.strength = params["strength"].get(1); + if (config_.strength < 0 || config_.strength > 2) { + LOG(RPiDpc, Error) << "Bad strength value"; + return -EINVAL; + } + + return 0; +} + +void Dpc::prepare(Metadata *imageMetadata) +{ + DpcStatus dpcStatus = {}; + /* Should we vary this with lux level or analogue gain? TBD. */ + dpcStatus.strength = config_.strength; + LOG(RPiDpc, Debug) << "strength " << dpcStatus.strength; + imageMetadata->set("dpc.status", dpcStatus); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Dpc(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/dpc.h b/src/ipa/rpi/controller/rpi/dpc.h new file mode 100644 index 00000000..84a05604 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/dpc.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * dpc.h - DPC (defective pixel correction) control algorithm + */ +#pragma once + +#include "../algorithm.h" +#include "../dpc_status.h" + +namespace RPiController { + +/* Back End algorithm to apply appropriate GEQ settings. */ + +struct DpcConfig { + int strength; +}; + +class Dpc : public Algorithm +{ +public: + Dpc(Controller *controller); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void prepare(Metadata *imageMetadata) override; + +private: + DpcConfig config_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/focus.h b/src/ipa/rpi/controller/rpi/focus.h new file mode 100644 index 00000000..8556039d --- /dev/null +++ b/src/ipa/rpi/controller/rpi/focus.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2020, Raspberry Pi Ltd + * + * focus.h - focus algorithm + */ +#pragma once + +#include "../algorithm.h" +#include "../metadata.h" + +/* + * The "focus" algorithm. All it does it print out a version of the + * focus contrast measure; there is no actual auto-focus mechanism to + * control. + */ + +namespace RPiController { + +class Focus : public Algorithm +{ +public: + Focus(Controller *controller); + char const *name() const override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/geq.cpp b/src/ipa/rpi/controller/rpi/geq.cpp new file mode 100644 index 00000000..510870e9 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/geq.cpp @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * geq.cpp - GEQ (green equalisation) control algorithm + */ + +#include + +#include "../device_status.h" +#include "../lux_status.h" +#include "../pwl.h" + +#include "geq.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiGeq) + +/* + * We use the lux status so that we can apply stronger settings in darkness (if + * necessary). + */ + +#define NAME "rpi.geq" + +Geq::Geq(Controller *controller) + : Algorithm(controller) +{ +} + +char const *Geq::name() const +{ + return NAME; +} + +int Geq::read(const libcamera::YamlObject ¶ms) +{ + config_.offset = params["offset"].get(0); + config_.slope = params["slope"].get(0.0); + if (config_.slope < 0.0 || config_.slope >= 1.0) { + LOG(RPiGeq, Error) << "Bad slope value"; + return -EINVAL; + } + + if (params.contains("strength")) { + int ret = config_.strength.read(params["strength"]); + if (ret) + return ret; + } + + return 0; +} + +void Geq::prepare(Metadata *imageMetadata) +{ + LuxStatus luxStatus = {}; + luxStatus.lux = 400; + if (imageMetadata->get("lux.status", luxStatus)) + LOG(RPiGeq, Warning) << "no lux data found"; + DeviceStatus deviceStatus; + deviceStatus.analogueGain = 1.0; /* in case not found */ + if (imageMetadata->get("device.status", deviceStatus)) + LOG(RPiGeq, Warning) + << "no device metadata - use analogue gain of 1x"; + GeqStatus geqStatus = {}; + double strength = config_.strength.empty() + ? 1.0 + : config_.strength.eval(config_.strength.domain().clip(luxStatus.lux)); + strength *= deviceStatus.analogueGain; + double offset = config_.offset * strength; + double slope = config_.slope * strength; + geqStatus.offset = std::min(65535.0, std::max(0.0, offset)); + geqStatus.slope = std::min(.99999, std::max(0.0, slope)); + LOG(RPiGeq, Debug) + << "offset " << geqStatus.offset << " slope " + << geqStatus.slope << " (analogue gain " + << deviceStatus.analogueGain << " lux " + << luxStatus.lux << ")"; + imageMetadata->set("geq.status", geqStatus); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Geq(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/geq.h b/src/ipa/rpi/controller/rpi/geq.h new file mode 100644 index 00000000..ee3a52ff --- /dev/null +++ b/src/ipa/rpi/controller/rpi/geq.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * geq.h - GEQ (green equalisation) control algorithm + */ +#pragma once + +#include "../algorithm.h" +#include "../geq_status.h" + +namespace RPiController { + +/* Back End algorithm to apply appropriate GEQ settings. */ + +struct GeqConfig { + uint16_t offset; + double slope; + Pwl strength; /* lux to strength factor */ +}; + +class Geq : public Algorithm +{ +public: + Geq(Controller *controller); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void prepare(Metadata *imageMetadata) override; + +private: + GeqConfig config_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/lux.cpp b/src/ipa/rpi/controller/rpi/lux.cpp new file mode 100644 index 00000000..06625f3a --- /dev/null +++ b/src/ipa/rpi/controller/rpi/lux.cpp @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * lux.cpp - Lux control algorithm + */ +#include + +#include + +#include "../device_status.h" + +#include "lux.h" + +using namespace RPiController; +using namespace libcamera; +using namespace std::literals::chrono_literals; + +LOG_DEFINE_CATEGORY(RPiLux) + +#define NAME "rpi.lux" + +Lux::Lux(Controller *controller) + : Algorithm(controller) +{ + /* + * Put in some defaults as there will be no meaningful values until + * Process has run. + */ + status_.aperture = 1.0; + status_.lux = 400; +} + +char const *Lux::name() const +{ + return NAME; +} + +int Lux::read(const libcamera::YamlObject ¶ms) +{ + auto value = params["reference_shutter_speed"].get(); + if (!value) + return -EINVAL; + referenceShutterSpeed_ = *value * 1.0us; + + value = params["reference_gain"].get(); + if (!value) + return -EINVAL; + referenceGain_ = *value; + + referenceAperture_ = params["reference_aperture"].get(1.0); + + value = params["reference_Y"].get(); + if (!value) + return -EINVAL; + referenceY_ = *value; + + value = params["reference_lux"].get(); + if (!value) + return -EINVAL; + referenceLux_ = *value; + + currentAperture_ = referenceAperture_; + return 0; +} + +void Lux::setCurrentAperture(double aperture) +{ + currentAperture_ = aperture; +} + +void Lux::prepare(Metadata *imageMetadata) +{ + std::unique_lock lock(mutex_); + imageMetadata->set("lux.status", status_); +} + +void Lux::process(StatisticsPtr &stats, Metadata *imageMetadata) +{ + DeviceStatus deviceStatus; + if (imageMetadata->get("device.status", deviceStatus) == 0) { + double currentGain = deviceStatus.analogueGain; + double currentAperture = deviceStatus.aperture.value_or(currentAperture_); + double currentY = stats->yHist.interQuantileMean(0, 1); + double gainRatio = referenceGain_ / currentGain; + double shutterSpeedRatio = + referenceShutterSpeed_ / deviceStatus.shutterSpeed; + double apertureRatio = referenceAperture_ / currentAperture; + double yRatio = currentY * (65536 / stats->yHist.bins()) / referenceY_; + double estimatedLux = shutterSpeedRatio * gainRatio * + apertureRatio * apertureRatio * + yRatio * referenceLux_; + LuxStatus status; + status.lux = estimatedLux; + status.aperture = currentAperture; + LOG(RPiLux, Debug) << ": estimated lux " << estimatedLux; + { + std::unique_lock lock(mutex_); + status_ = status; + } + /* + * Overwrite the metadata here as well, so that downstream + * algorithms get the latest value. + */ + imageMetadata->set("lux.status", status); + } else + LOG(RPiLux, Warning) << ": no device metadata"; +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Lux(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/lux.h b/src/ipa/rpi/controller/rpi/lux.h new file mode 100644 index 00000000..89411a54 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/lux.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * lux.h - Lux control algorithm + */ +#pragma once + +#include + +#include + +#include "../lux_status.h" +#include "../algorithm.h" + +/* This is our implementation of the "lux control algorithm". */ + +namespace RPiController { + +class Lux : public Algorithm +{ +public: + Lux(Controller *controller); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void prepare(Metadata *imageMetadata) override; + void process(StatisticsPtr &stats, Metadata *imageMetadata) override; + void setCurrentAperture(double aperture); + +private: + /* + * These values define the conditions of the reference image, against + * which we compare the new image. + */ + libcamera::utils::Duration referenceShutterSpeed_; + double referenceGain_; + double referenceAperture_; /* units of 1/f */ + double referenceY_; /* out of 65536 */ + double referenceLux_; + double currentAperture_; + LuxStatus status_; + std::mutex mutex_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/noise.cpp b/src/ipa/rpi/controller/rpi/noise.cpp new file mode 100644 index 00000000..bcd8b9ed --- /dev/null +++ b/src/ipa/rpi/controller/rpi/noise.cpp @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * noise.cpp - Noise control algorithm + */ + +#include + +#include + +#include "../device_status.h" +#include "../noise_status.h" + +#include "noise.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiNoise) + +#define NAME "rpi.noise" + +Noise::Noise(Controller *controller) + : Algorithm(controller), modeFactor_(1.0) +{ +} + +char const *Noise::name() const +{ + return NAME; +} + +void Noise::switchMode(CameraMode const &cameraMode, + [[maybe_unused]] Metadata *metadata) +{ + /* + * For example, we would expect a 2x2 binned mode to have a "noise + * factor" of sqrt(2x2) = 2. (can't be less than one, right?) + */ + modeFactor_ = std::max(1.0, cameraMode.noiseFactor); +} + +int Noise::read(const libcamera::YamlObject ¶ms) +{ + auto value = params["reference_constant"].get(); + if (!value) + return -EINVAL; + referenceConstant_ = *value; + + value = params["reference_slope"].get(); + if (!value) + return -EINVAL; + referenceSlope_ = *value; + + return 0; +} + +void Noise::prepare(Metadata *imageMetadata) +{ + struct DeviceStatus deviceStatus; + deviceStatus.analogueGain = 1.0; /* keep compiler calm */ + if (imageMetadata->get("device.status", deviceStatus) == 0) { + /* + * There is a slight question as to exactly how the noise + * profile, specifically the constant part of it, scales. For + * now we assume it all scales the same, and we'll revisit this + * if it proves substantially wrong. NOTE: we may also want to + * make some adjustments based on the camera mode (such as + * binning), if we knew how to discover it... + */ + double factor = sqrt(deviceStatus.analogueGain) / modeFactor_; + struct NoiseStatus status; + status.noiseConstant = referenceConstant_ * factor; + status.noiseSlope = referenceSlope_ * factor; + imageMetadata->set("noise.status", status); + LOG(RPiNoise, Debug) + << "constant " << status.noiseConstant + << " slope " << status.noiseSlope; + } else + LOG(RPiNoise, Warning) << " no metadata"; +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return new Noise(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/noise.h b/src/ipa/rpi/controller/rpi/noise.h new file mode 100644 index 00000000..74c31e64 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/noise.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * noise.h - Noise control algorithm + */ +#pragma once + +#include "../algorithm.h" +#include "../noise_status.h" + +/* This is our implementation of the "noise algorithm". */ + +namespace RPiController { + +class Noise : public Algorithm +{ +public: + Noise(Controller *controller); + char const *name() const override; + void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; + int read(const libcamera::YamlObject ¶ms) override; + void prepare(Metadata *imageMetadata) override; + +private: + /* the noise profile for analogue gain of 1.0 */ + double referenceConstant_; + double referenceSlope_; + double modeFactor_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/sdn.cpp b/src/ipa/rpi/controller/rpi/sdn.cpp new file mode 100644 index 00000000..b6b66251 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/sdn.cpp @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * sdn.cpp - SDN (spatial denoise) control algorithm + */ + +#include + +#include "../denoise_status.h" +#include "../noise_status.h" + +#include "sdn.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiSdn) + +/* + * Calculate settings for the spatial denoise block using the noise profile in + * the image metadata. + */ + +#define NAME "rpi.sdn" + +Sdn::Sdn(Controller *controller) + : DenoiseAlgorithm(controller), mode_(DenoiseMode::ColourOff) +{ +} + +char const *Sdn::name() const +{ + return NAME; +} + +int Sdn::read(const libcamera::YamlObject ¶ms) +{ + deviation_ = params["deviation"].get(3.2); + strength_ = params["strength"].get(0.75); + return 0; +} + +void Sdn::initialise() +{ +} + +void Sdn::prepare(Metadata *imageMetadata) +{ + struct NoiseStatus noiseStatus = {}; + noiseStatus.noiseSlope = 3.0; /* in case no metadata */ + if (imageMetadata->get("noise.status", noiseStatus) != 0) + LOG(RPiSdn, Warning) << "no noise profile found"; + LOG(RPiSdn, Debug) + << "Noise profile: constant " << noiseStatus.noiseConstant + << " slope " << noiseStatus.noiseSlope; + struct DenoiseStatus status; + status.noiseConstant = noiseStatus.noiseConstant * deviation_; + status.noiseSlope = noiseStatus.noiseSlope * deviation_; + status.strength = strength_; + status.mode = static_cast>(mode_); + imageMetadata->set("denoise.status", status); + LOG(RPiSdn, Debug) + << "programmed constant " << status.noiseConstant + << " slope " << status.noiseSlope + << " strength " << status.strength; +} + +void Sdn::setMode(DenoiseMode mode) +{ + /* We only distinguish between off and all other modes. */ + mode_ = mode; +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return (Algorithm *)new Sdn(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/sdn.h b/src/ipa/rpi/controller/rpi/sdn.h new file mode 100644 index 00000000..9dd73c38 --- /dev/null +++ b/src/ipa/rpi/controller/rpi/sdn.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * sdn.h - SDN (spatial denoise) control algorithm + */ +#pragma once + +#include "../algorithm.h" +#include "../denoise_algorithm.h" + +namespace RPiController { + +/* Algorithm to calculate correct spatial denoise (SDN) settings. */ + +class Sdn : public DenoiseAlgorithm +{ +public: + Sdn(Controller *controller = NULL); + char const *name() const override; + int read(const libcamera::YamlObject ¶ms) override; + void initialise() override; + void prepare(Metadata *imageMetadata) override; + void setMode(DenoiseMode mode) override; + +private: + double deviation_; + double strength_; + DenoiseMode mode_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/rpi/sharpen.cpp b/src/ipa/rpi/controller/rpi/sharpen.cpp new file mode 100644 index 00000000..4f6f020a --- /dev/null +++ b/src/ipa/rpi/controller/rpi/sharpen.cpp @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * sharpen.cpp - sharpening control algorithm + */ + +#include + +#include + +#include "../sharpen_status.h" + +#include "sharpen.h" + +using namespace RPiController; +using namespace libcamera; + +LOG_DEFINE_CATEGORY(RPiSharpen) + +#define NAME "rpi.sharpen" + +Sharpen::Sharpen(Controller *controller) + : SharpenAlgorithm(controller), userStrength_(1.0) +{ +} + +char const *Sharpen::name() const +{ + return NAME; +} + +void Sharpen::switchMode(CameraMode const &cameraMode, + [[maybe_unused]] Metadata *metadata) +{ + /* can't be less than one, right? */ + modeFactor_ = std::max(1.0, cameraMode.noiseFactor); +} + +int Sharpen::read(const libcamera::YamlObject ¶ms) +{ + threshold_ = params["threshold"].get(1.0); + strength_ = params["strength"].get(1.0); + limit_ = params["limit"].get(1.0); + LOG(RPiSharpen, Debug) + << "Read threshold " << threshold_ + << " strength " << strength_ + << " limit " << limit_; + return 0; +} + +void Sharpen::setStrength(double strength) +{ + /* + * Note that this function is how an application sets the overall + * sharpening "strength". We call this the "user strength" field + * as there already is a strength_ field - being an internal gain + * parameter that gets passed to the ISP control code. Negative + * values are not allowed - coerce them to zero (no sharpening). + */ + userStrength_ = std::max(0.0, strength); +} + +void Sharpen::prepare(Metadata *imageMetadata) +{ + /* + * The userStrength_ affects the algorithm's internal gain directly, but + * we adjust the limit and threshold less aggressively. Using a sqrt + * function is an arbitrary but gentle way of accomplishing this. + */ + double userStrengthSqrt = sqrt(userStrength_); + struct SharpenStatus status; + /* + * Binned modes seem to need the sharpening toned down with this + * pipeline, thus we use the modeFactor_ here. Also avoid + * divide-by-zero with the userStrengthSqrt. + */ + status.threshold = threshold_ * modeFactor_ / + std::max(0.01, userStrengthSqrt); + status.strength = strength_ / modeFactor_ * userStrength_; + status.limit = limit_ / modeFactor_ * userStrengthSqrt; + /* Finally, report any application-supplied parameters that were used. */ + status.userStrength = userStrength_; + imageMetadata->set("sharpen.status", status); +} + +/* Register algorithm with the system. */ +static Algorithm *create(Controller *controller) +{ + return new Sharpen(controller); +} +static RegisterAlgorithm reg(NAME, &create); diff --git a/src/ipa/rpi/controller/rpi/sharpen.h b/src/ipa/rpi/controller/rpi/sharpen.h new file mode 100644 index 00000000..8bb7631e --- /dev/null +++ b/src/ipa/rpi/controller/rpi/sharpen.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * sharpen.h - sharpening control algorithm + */ +#pragma once + +#include "../sharpen_algorithm.h" +#include "../sharpen_status.h" + +/* This is our implementation of the "sharpen algorithm". */ + +namespace RPiController { + +class Sharpen : public SharpenAlgorithm +{ +public: + Sharpen(Controller *controller); + char const *name() const override; + void switchMode(CameraMode const &cameraMode, Metadata *metadata) override; + int read(const libcamera::YamlObject ¶ms) override; + void setStrength(double strength) override; + void prepare(Metadata *imageMetadata) override; + +private: + double threshold_; + double strength_; + double limit_; + double modeFactor_; + double userStrength_; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/sharpen_algorithm.h b/src/ipa/rpi/controller/sharpen_algorithm.h new file mode 100644 index 00000000..3be21c32 --- /dev/null +++ b/src/ipa/rpi/controller/sharpen_algorithm.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2020, Raspberry Pi Ltd + * + * sharpen_algorithm.h - sharpness control algorithm interface + */ +#pragma once + +#include "algorithm.h" + +namespace RPiController { + +class SharpenAlgorithm : public Algorithm +{ +public: + SharpenAlgorithm(Controller *controller) : Algorithm(controller) {} + /* A sharpness control algorithm must provide the following: */ + virtual void setStrength(double strength) = 0; +}; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/controller/sharpen_status.h b/src/ipa/rpi/controller/sharpen_status.h new file mode 100644 index 00000000..106166db --- /dev/null +++ b/src/ipa/rpi/controller/sharpen_status.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019, Raspberry Pi Ltd + * + * sharpen_status.h - Sharpen control algorithm status + */ +#pragma once + +/* The "sharpen" algorithm stores the strength to use. */ + +struct SharpenStatus { + /* controls the smallest level of detail (or noise!) that sharpening will pick up */ + double threshold; + /* the rate at which the sharpening response ramps once above the threshold */ + double strength; + /* upper limit of the allowed sharpening response */ + double limit; + /* The sharpening strength requested by the user or application. */ + double userStrength; +}; diff --git a/src/ipa/rpi/controller/statistics.h b/src/ipa/rpi/controller/statistics.h new file mode 100644 index 00000000..015d4efc --- /dev/null +++ b/src/ipa/rpi/controller/statistics.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2022, Raspberry Pi Ltd + * + * statistics.h - Raspberry Pi generic statistics structure + */ +#pragma once + +#include +#include +#include + +#include "histogram.h" +#include "region_stats.h" + +namespace RPiController { + +struct RgbySums { + RgbySums(uint64_t _rSum = 0, uint64_t _gSum = 0, uint64_t _bSum = 0, uint64_t _ySum = 0) + : rSum(_rSum), gSum(_gSum), bSum(_bSum), ySum(_ySum) + { + } + uint64_t rSum; + uint64_t gSum; + uint64_t bSum; + uint64_t ySum; +}; + +using RgbyRegions = RegionStats; +using FocusRegions = RegionStats; + +struct Statistics { + /* + * All region based statistics are normalised to 16-bits, giving a + * maximum value of (1 << NormalisationFactorPow2) - 1. + */ + static constexpr unsigned int NormalisationFactorPow2 = 16; + + /* + * Positioning of the AGC statistics gathering in the pipeline: + * Pre-WB correction or post-WB correction. + * Assume this is post-LSC. + */ + enum class AgcStatsPos { PreWb, PostWb }; + const AgcStatsPos agcStatsPos; + + /* + * Positioning of the AWB/ALSC statistics gathering in the pipeline: + * Pre-LSC or post-LSC. + */ + enum class ColourStatsPos { PreLsc, PostLsc }; + const ColourStatsPos colourStatsPos; + + Statistics(AgcStatsPos a, ColourStatsPos c) + : agcStatsPos(a), colourStatsPos(c) + { + } + + /* Histogram statistics. Not all histograms may be populated! */ + Histogram rHist; + Histogram gHist; + Histogram bHist; + Histogram yHist; + + /* Row sums for flicker avoidance. */ + std::vector rowSums; + + /* Region based colour sums. */ + RgbyRegions agcRegions; + RgbyRegions awbRegions; + + /* Region based focus FoM. */ + FocusRegions focusRegions; +}; + +using StatisticsPtr = std::shared_ptr; + +} /* namespace RPiController */ diff --git a/src/ipa/rpi/meson.build b/src/ipa/rpi/meson.build new file mode 100644 index 00000000..7d7a61f7 --- /dev/null +++ b/src/ipa/rpi/meson.build @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: CC0-1.0 + +subdir('cam_helper') +subdir('controller') + +foreach pipeline : pipelines + pipeline = pipeline.split('/') + if pipeline.length() < 2 or pipeline[0] != 'rpi' + continue + endif + + subdir(pipeline[1]) +endforeach diff --git a/src/ipa/rpi/vc4/data/imx219.json b/src/ipa/rpi/vc4/data/imx219.json new file mode 100644 index 00000000..efe7210a --- /dev/null +++ b/src/ipa/rpi/vc4/data/imx219.json @@ -0,0 +1,486 @@ +{ + "version": 2.0, + "target": "bcm2835", + "algorithms": [ + { + "rpi.black_level": + { + "black_level": 4096 + } + }, + { + "rpi.dpc": { } + }, + { + "rpi.lux": + { + "reference_shutter_speed": 27685, + "reference_gain": 1.0, + "reference_aperture": 1.0, + "reference_lux": 998, + "reference_Y": 12744 + } + }, + { + "rpi.noise": + { + "reference_constant": 0, + "reference_slope": 3.67 + } + }, + { + "rpi.geq": + { + "offset": 204, + "slope": 0.01633 + } + }, + { + "rpi.sdn": { } + }, + { + "rpi.awb": + { + "priors": [ + { + "lux": 0, + "prior": + [ + 2000, 1.0, + 3000, 0.0, + 13000, 0.0 + ] + }, + { + "lux": 800, + "prior": + [ + 2000, 0.0, + 6000, 2.0, + 13000, 2.0 + ] + }, + { + "lux": 1500, + "prior": + [ + 2000, 0.0, + 4000, 1.0, + 6000, 6.0, + 6500, 7.0, + 7000, 1.0, + 13000, 1.0 + ] + } + ], + "modes": + { + "auto": + { + "lo": 2500, + "hi": 8000 + }, + "incandescent": + { + "lo": 2500, + "hi": 3000 + }, + "tungsten": + { + "lo": 3000, + "hi": 3500 + }, + "fluorescent": + { + "lo": 4000, + "hi": 4700 + }, + "indoor": + { + "lo": 3000, + "hi": 5000 + }, + "daylight": + { + "lo": 5500, + "hi": 6500 + }, + "cloudy": + { + "lo": 7000, + "hi": 8600 + } + }, + "bayes": 1, + "ct_curve": + [ + 2498.0, 0.9309, 0.3599, + 2911.0, 0.8682, 0.4283, + 2919.0, 0.8358, 0.4621, + 3627.0, 0.7646, 0.5327, + 4600.0, 0.6079, 0.6721, + 5716.0, 0.5712, 0.7017, + 8575.0, 0.4331, 0.8037 + ], + "sensitivity_r": 1.05, + "sensitivity_b": 1.05, + "transverse_pos": 0.04791, + "transverse_neg": 0.04881 + } + }, + { + "rpi.agc": + { + "metering_modes": + { + "centre-weighted": + { + "weights": [ 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0 ] + }, + "spot": + { + "weights": [ 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ] + }, + "matrix": + { + "weights": [ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ] + } + }, + "exposure_modes": + { + "normal": + { + "shutter": [ 100, 10000, 30000, 60000, 66666 ], + "gain": [ 1.0, 2.0, 4.0, 6.0, 8.0 ] + }, + "short": + { + "shutter": [ 100, 5000, 10000, 20000, 33333 ], + "gain": [ 1.0, 2.0, 4.0, 6.0, 8.0 ] + }, + "long": + { + "shutter": [ 100, 10000, 30000, 60000, 120000 ], + "gain": [ 1.0, 2.0, 4.0, 6.0, 12.0 ] + } + }, + "constraint_modes": + { + "normal": [ + { + "bound": "LOWER", + "q_lo": 0.98, + "q_hi": 1.0, + "y_target": + [ + 0, 0.5, + 1000, 0.5 + ] + } + ], + "highlight": [ + { + "bound": "LOWER", + "q_lo": 0.98, + "q_hi": 1.0, + "y_target": + [ + 0, 0.5, + 1000, 0.5 + ] + }, + { + "bound": "UPPER", + "q_lo": 0.98, + "q_hi": 1.0, + "y_target": + [ + 0, 0.8, + 1000, 0.8 + ] + } + ], + "shadows": [ + { + "bound": "LOWER", + "q_lo": 0.0, + "q_hi": 0.5, + "y_target": + [ + 0, 0.17, + 1000, 0.17 + ] + } + ] + }, + "y_target": + [ + 0, 0.16, + 1000, 0.165, + 10000, 0.17 + ] + } + }, + { + "rpi.alsc": + { + "omega": 1.3, + "n_iter": 100, + "luminance_strength": 0.7, + "calibrations_Cr": [ + { + "ct": 3000, + "table": + [ + 1.487, 1.481, 1.481, 1.445, 1.389, 1.327, 1.307, 1.307, 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"dropout_frames": 6, + "step_frames": 4 + }, + "fast": + { + "step_coarse": 2.0, + "step_fine": 0.5, + "contrast_ratio": 0.75, + "pdaf_gain": -0.05, + "pdaf_squelch": 0.2, + "max_slew": 5.0, + "pdaf_frames": 16, + "dropout_frames": 6, + "step_frames": 4 + } + }, + "conf_epsilon": 8, + "conf_thresh": 12, + "conf_clip": 512, + "skip_frames": 5, + "map": [ 0.0, 420, 35.0, 920 ] + } + } + ] +} diff --git a/src/ipa/rpi/vc4/data/meson.build b/src/ipa/rpi/vc4/data/meson.build new file mode 100644 index 00000000..bcf5658b --- /dev/null +++ b/src/ipa/rpi/vc4/data/meson.build @@ -0,0 +1,26 @@ +# SPDX-License-Identifier: CC0-1.0 + +conf_files = files([ + 'imx219.json', + 'imx219_noir.json', + 'imx290.json', + 'imx296.json', + 'imx296_mono.json', + 'imx378.json', + 'imx477.json', + 'imx477_noir.json', + 'imx477_scientific.json', + 'imx519.json', + 'imx708.json', + 'imx708_noir.json', + 'imx708_wide.json', + 'imx708_wide_noir.json', + 'ov5647.json', + 'ov5647_noir.json', + 'ov9281_mono.json', + 'se327m12.json', + 'uncalibrated.json', +]) + +install_data(conf_files, + install_dir : ipa_data_dir / 'rpi' / 'vc4') diff --git a/src/ipa/rpi/vc4/data/ov5647.json b/src/ipa/rpi/vc4/data/ov5647.json new file mode 100644 index 00000000..d770e44f --- /dev/null +++ b/src/ipa/rpi/vc4/data/ov5647.json @@ -0,0 +1,487 @@ +{ + "version": 2.0, + "target": "bcm2835", + "algorithms": [ + { + "rpi.black_level": + { + "black_level": 1024 + } + }, + { + "rpi.dpc": { } + }, + { + "rpi.lux": + { + "reference_shutter_speed": 21663, + "reference_gain": 1.0, + "reference_aperture": 1.0, + "reference_lux": 987, + "reference_Y": 8961 + } + }, + { + "rpi.noise": + { + "reference_constant": 0, + "reference_slope": 4.25 + } + }, + { + "rpi.geq": + { + "offset": 401, + "slope": 0.05619 + } + }, + { + "rpi.sdn": { } + }, + { + "rpi.awb": + { + "priors": [ + { + "lux": 0, + "prior": + [ + 2000, 1.0, + 3000, 0.0, + 13000, 0.0 + ] + }, + { + "lux": 800, + "prior": + [ + 2000, 0.0, + 6000, 2.0, + 13000, 2.0 + ] + }, + { + "lux": 1500, + "prior": + [ + 2000, 0.0, + 4000, 1.0, + 6000, 6.0, + 6500, 7.0, + 7000, 1.0, + 13000, 1.0 + ] + } + ], + "modes": + { + "auto": + { + "lo": 2500, + "hi": 8000 + }, + "incandescent": + { + "lo": 2500, + "hi": 3000 + }, + "tungsten": + { + "lo": 3000, + "hi": 3500 + }, + "fluorescent": + { + "lo": 4000, + "hi": 4700 + }, + "indoor": + { + "lo": 3000, + "hi": 5000 + }, + "daylight": + { + "lo": 5500, + "hi": 6500 + }, + "cloudy": + { + "lo": 7000, + "hi": 8600 + } + }, + "bayes": 1, + "ct_curve": + [ + 2500.0, 1.0289, 0.4503, + 2803.0, 0.9428, 0.5108, + 2914.0, 0.9406, 0.5127, + 3605.0, 0.8261, 0.6249, + 4540.0, 0.7331, 0.7533, + 5699.0, 0.6715, 0.8627, + 8625.0, 0.6081, 1.0012 + ], + "sensitivity_r": 1.05, + "sensitivity_b": 1.05, + "transverse_pos": 0.0321, + "transverse_neg": 0.04313 + } + }, + { + "rpi.agc": + { + "metering_modes": + { + "centre-weighted": + { + "weights": [ 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0 ] + }, + "spot": + { + "weights": [ 2, 1, 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57344, 63419, + 61440, 64476, + 65535, 65535 + ] + } + }, + { + "rpi.ccm": + { + "ccms": [ + { + "ct": 2900, + "ccm": + [ + 1.44924, -0.12935, -0.31989, + -0.65839, 1.95441, -0.29602, + 0.18344, -1.22282, 2.03938 + ] + }, + { + "ct": 3000, + "ccm": + [ + 1.38736, 0.07714, -0.46451, + -0.59691, 1.84335, -0.24644, + 0.10092, -1.30441, 2.20349 + ] + }, + { + "ct": 3600, + "ccm": + [ + 1.51261, -0.27921, -0.23339, + -0.55129, 1.83241, -0.28111, + 0.11649, -0.93195, 1.81546 + ] + }, + { + "ct": 4600, + "ccm": + [ + 1.47082, -0.18523, -0.28559, + -0.48923, 1.95126, -0.46203, + 0.07951, -0.83987, 1.76036 + ] + }, + { + "ct": 5800, + "ccm": + [ + 1.57294, -0.36229, -0.21065, + -0.42272, 1.80305, -0.38032, + 0.03671, -0.66862, 1.63191 + ] + }, + { + "ct": 8100, + "ccm": + [ + 1.58803, -0.09912, -0.48891, + -0.42594, 2.22303, -0.79709, + -0.00621, -0.90516, 1.91137 + ] + } + ] + } + }, + { + "rpi.sharpen": + { + "threshold": 2.0, + "strength": 0.5, + "limit": 0.5 + } + } + ] +} \ No newline at end of file diff --git a/src/ipa/rpi/vc4/data/uncalibrated.json b/src/ipa/rpi/vc4/data/uncalibrated.json new file mode 100644 index 00000000..13eb3f17 --- /dev/null +++ b/src/ipa/rpi/vc4/data/uncalibrated.json @@ -0,0 +1,118 @@ +{ + "version": 2.0, + "target": "bcm2835", + "algorithms": [ + { + "rpi.black_level": + { + "black_level": 4096 + } + }, + { + "rpi.awb": + { + "use_derivatives": 0, + "bayes": 0 + } + }, + { + "rpi.agc": + { + "metering_modes": + { + "centre-weighted": + { + "weights": [ 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0 ] + } + }, + "exposure_modes": + { + "normal": + { + "shutter": [ 100, 15000, 30000, 60000, 120000 ], + "gain": [ 1.0, 2.0, 3.0, 4.0, 6.0 ] + } + }, + "constraint_modes": + { + "normal": [ + { + "bound": "LOWER", + "q_lo": 0.98, + "q_hi": 1.0, + "y_target": + [ + 0, 0.4, + 1000, 0.4 + ] + } + ] + }, + "y_target": + [ + 0, 0.16, + 1000, 0.165, + 10000, 0.17 + ] + } + }, + { + "rpi.ccm": + { + "ccms": [ + { + "ct": 4000, + "ccm": + [ + 2.0, -1.0, 0.0, + -0.5, 2.0, -0.5, + 0, -1.0, 2.0 + ] + } + ] + } + }, + { + "rpi.contrast": + { + "ce_enable": 0, + "gamma_curve": + [ + 0, 0, + 1024, 5040, + 2048, 9338, + 3072, 12356, + 4096, 15312, + 5120, 18051, + 6144, 20790, + 7168, 23193, + 8192, 25744, + 9216, 27942, + 10240, 30035, + 11264, 32005, + 12288, 33975, + 13312, 35815, + 14336, 37600, + 15360, 39168, + 16384, 40642, + 18432, 43379, + 20480, 45749, + 22528, 47753, + 24576, 49621, + 26624, 51253, + 28672, 52698, + 30720, 53796, + 32768, 54876, + 36864, 57012, + 40960, 58656, + 45056, 59954, + 49152, 61183, + 53248, 62355, + 57344, 63419, + 61440, 64476, + 65535, 65535 + ] + } + } + ] +} \ No newline at end of file diff --git a/src/ipa/rpi/vc4/meson.build b/src/ipa/rpi/vc4/meson.build new file mode 100644 index 00000000..df01c150 --- /dev/null +++ b/src/ipa/rpi/vc4/meson.build @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: CC0-1.0 + +ipa_name = 'ipa_rpi_vc4' + +vc4_ipa_deps = [ + libcamera_private, + libatomic, +] + +vc4_ipa_libs = [ + rpi_ipa_cam_helper_lib, + rpi_ipa_controller_lib +] + +vc4_ipa_includes = [ + ipa_includes, + libipa_includes, +] + +vc4_ipa_sources = files([ + 'raspberrypi.cpp', +]) + +vc4_ipa_includes += include_directories('..') + +mod = shared_module(ipa_name, + [vc4_ipa_sources, libcamera_generated_ipa_headers], + name_prefix : '', + include_directories : vc4_ipa_includes, + dependencies : vc4_ipa_deps, + link_with : libipa, + link_whole : vc4_ipa_libs, + install : true, + install_dir : ipa_install_dir) + +if ipa_sign_module + custom_target(ipa_name + '.so.sign', + input : mod, + output : ipa_name + '.so.sign', + command : [ipa_sign, ipa_priv_key, '@INPUT@', '@OUTPUT@'], + install : false, + build_by_default : true) +endif + +subdir('data') + +ipa_names += ipa_name diff --git a/src/ipa/rpi/vc4/raspberrypi.cpp b/src/ipa/rpi/vc4/raspberrypi.cpp new file mode 100644 index 00000000..5d3bf4ca --- /dev/null +++ b/src/ipa/rpi/vc4/raspberrypi.cpp @@ -0,0 +1,1853 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * rpi.cpp - Raspberry Pi Image Processing Algorithms + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include + +#include "libcamera/internal/mapped_framebuffer.h" + +#include "cam_helper/cam_helper.h" +#include "controller/af_algorithm.h" +#include "controller/af_status.h" +#include "controller/agc_algorithm.h" +#include "controller/agc_status.h" +#include "controller/alsc_status.h" +#include "controller/awb_algorithm.h" +#include "controller/awb_status.h" +#include "controller/black_level_status.h" +#include "controller/ccm_algorithm.h" +#include "controller/ccm_status.h" +#include "controller/contrast_algorithm.h" +#include "controller/contrast_status.h" +#include "controller/controller.h" +#include "controller/denoise_algorithm.h" +#include "controller/denoise_status.h" +#include "controller/dpc_status.h" +#include "controller/geq_status.h" +#include "controller/lux_status.h" +#include "controller/metadata.h" +#include "controller/sharpen_algorithm.h" +#include "controller/sharpen_status.h" +#include "controller/statistics.h" + +namespace libcamera { + +using namespace std::literals::chrono_literals; +using utils::Duration; + +/* Number of metadata objects available in the context list. */ +constexpr unsigned int numMetadataContexts = 16; + +/* Number of frame length times to hold in the queue. */ +constexpr unsigned int FrameLengthsQueueSize = 10; + +/* Configure the sensor with these values initially. */ +constexpr double defaultAnalogueGain = 1.0; +constexpr Duration defaultExposureTime = 20.0ms; +constexpr Duration defaultMinFrameDuration = 1.0s / 30.0; +constexpr Duration defaultMaxFrameDuration = 250.0s; + +/* + * Determine the minimum allowable inter-frame duration to run the controller + * algorithms. If the pipeline handler provider frames at a rate higher than this, + * we rate-limit the controller Prepare() and Process() calls to lower than or + * equal to this rate. + */ +constexpr Duration controllerMinFrameDuration = 1.0s / 30.0; + +/* List of controls handled by the Raspberry Pi IPA */ +static const ControlInfoMap::Map ipaControls{ + { &controls::AeEnable, ControlInfo(false, true) }, + { &controls::ExposureTime, ControlInfo(0, 66666) }, + { &controls::AnalogueGain, ControlInfo(1.0f, 16.0f) }, + { &controls::AeMeteringMode, ControlInfo(controls::AeMeteringModeValues) }, + { &controls::AeConstraintMode, ControlInfo(controls::AeConstraintModeValues) }, + { &controls::AeExposureMode, ControlInfo(controls::AeExposureModeValues) }, + { &controls::ExposureValue, ControlInfo(-8.0f, 8.0f, 0.0f) }, + { &controls::AwbEnable, ControlInfo(false, true) }, + { &controls::ColourGains, ControlInfo(0.0f, 32.0f) }, + { &controls::AwbMode, ControlInfo(controls::AwbModeValues) }, + { &controls::Brightness, ControlInfo(-1.0f, 1.0f, 0.0f) }, + { &controls::Contrast, ControlInfo(0.0f, 32.0f, 1.0f) }, + { &controls::Saturation, ControlInfo(0.0f, 32.0f, 1.0f) }, + { &controls::Sharpness, ControlInfo(0.0f, 16.0f, 1.0f) }, + { &controls::ColourCorrectionMatrix, ControlInfo(-16.0f, 16.0f) }, + { &controls::ScalerCrop, ControlInfo(Rectangle{}, Rectangle(65535, 65535, 65535, 65535), Rectangle{}) }, + { &controls::FrameDurationLimits, ControlInfo(INT64_C(33333), INT64_C(120000)) }, + { &controls::draft::NoiseReductionMode, ControlInfo(controls::draft::NoiseReductionModeValues) } +}; + +/* IPA controls handled conditionally, if the lens has a focus control */ +static const ControlInfoMap::Map ipaAfControls{ + { &controls::AfMode, ControlInfo(controls::AfModeValues) }, + { &controls::AfRange, ControlInfo(controls::AfRangeValues) }, + { &controls::AfSpeed, ControlInfo(controls::AfSpeedValues) }, + { &controls::AfMetering, ControlInfo(controls::AfMeteringValues) }, + { &controls::AfWindows, ControlInfo(Rectangle{}, Rectangle(65535, 65535, 65535, 65535), Rectangle{}) }, + { &controls::AfTrigger, ControlInfo(controls::AfTriggerValues) }, + { &controls::AfPause, ControlInfo(controls::AfPauseValues) }, + { &controls::LensPosition, ControlInfo(0.0f, 32.0f, 1.0f) } +}; + +LOG_DEFINE_CATEGORY(IPARPI) + +namespace ipa::RPi { + +class IPARPi : public IPARPiInterface +{ +public: + IPARPi() + : controller_(), frameCount_(0), checkCount_(0), mistrustCount_(0), + lastRunTimestamp_(0), lsTable_(nullptr), firstStart_(true), + lastTimeout_(0s) + { + } + + ~IPARPi() + { + if (lsTable_) + munmap(lsTable_, MaxLsGridSize); + } + + int init(const IPASettings &settings, bool lensPresent, IPAInitResult *result) override; + void start(const ControlList &controls, StartConfig *startConfig) override; + void stop() override {} + + int configure(const IPACameraSensorInfo &sensorInfo, const IPAConfig &data, + ControlList *controls, IPAConfigResult *result) override; + void mapBuffers(const std::vector &buffers) override; + void unmapBuffers(const std::vector &ids) override; + void signalStatReady(const uint32_t bufferId, uint32_t ipaContext) override; + void signalQueueRequest(const ControlList &controls) override; + void signalIspPrepare(const ISPConfig &data) override; + +private: + void setMode(const IPACameraSensorInfo &sensorInfo); + bool validateSensorControls(); + bool validateIspControls(); + bool validateLensControls(); + void queueRequest(const ControlList &controls); + void returnEmbeddedBuffer(unsigned int bufferId); + void prepareISP(const ISPConfig &data); + void reportMetadata(unsigned int ipaContext); + void fillDeviceStatus(const ControlList &sensorControls, unsigned int ipaContext); + RPiController::StatisticsPtr fillStatistics(bcm2835_isp_stats *stats) const; + void processStats(unsigned int bufferId, unsigned int ipaContext); + void setCameraTimeoutValue(); + void applyFrameDurations(Duration minFrameDuration, Duration maxFrameDuration); + void applyAGC(const struct AgcStatus *agcStatus, ControlList &ctrls); + void applyAWB(const struct AwbStatus *awbStatus, ControlList &ctrls); + void applyDG(const struct AgcStatus *dgStatus, ControlList &ctrls); + void applyCCM(const struct CcmStatus *ccmStatus, ControlList &ctrls); + void applyBlackLevel(const struct BlackLevelStatus *blackLevelStatus, ControlList &ctrls); + void applyGamma(const struct ContrastStatus *contrastStatus, ControlList &ctrls); + void applyGEQ(const struct GeqStatus *geqStatus, ControlList &ctrls); + void applyDenoise(const struct DenoiseStatus *denoiseStatus, ControlList &ctrls); + void applySharpen(const struct SharpenStatus *sharpenStatus, ControlList &ctrls); + void applyDPC(const struct DpcStatus *dpcStatus, ControlList &ctrls); + void applyLS(const struct AlscStatus *lsStatus, ControlList &ctrls); + void applyAF(const struct AfStatus *afStatus, ControlList &lensCtrls); + void resampleTable(uint16_t dest[], const std::vector &src, int destW, int destH); + + std::map buffers_; + + ControlInfoMap sensorCtrls_; + ControlInfoMap ispCtrls_; + ControlInfoMap lensCtrls_; + bool lensPresent_; + ControlList libcameraMetadata_; + + /* Camera sensor params. */ + CameraMode mode_; + + /* Raspberry Pi controller specific defines. */ + std::unique_ptr helper_; + RPiController::Controller controller_; + std::array rpiMetadata_; + + /* + * We count frames to decide if the frame must be hidden (e.g. from + * display) or mistrusted (i.e. not given to the control algos). + */ + uint64_t frameCount_; + + /* For checking the sequencing of Prepare/Process calls. */ + uint64_t checkCount_; + + /* How many frames we should avoid running control algos on. */ + unsigned int mistrustCount_; + + /* Number of frames that need to be dropped on startup. */ + unsigned int dropFrameCount_; + + /* Frame timestamp for the last run of the controller. */ + uint64_t lastRunTimestamp_; + + /* Do we run a Controller::process() for this frame? */ + bool processPending_; + + /* LS table allocation passed in from the pipeline handler. */ + SharedFD lsTableHandle_; + void *lsTable_; + + /* Distinguish the first camera start from others. */ + bool firstStart_; + + /* Frame duration (1/fps) limits. */ + Duration minFrameDuration_; + Duration maxFrameDuration_; + + /* Track the frame length times over FrameLengthsQueueSize frames. */ + std::deque frameLengths_; + Duration lastTimeout_; +}; + +int IPARPi::init(const IPASettings &settings, bool lensPresent, IPAInitResult *result) +{ + /* + * Load the "helper" for this sensor. This tells us all the device specific stuff + * that the kernel driver doesn't. We only do this the first time; we don't need + * to re-parse the metadata after a simple mode-switch for no reason. + */ + helper_ = std::unique_ptr(RPiController::CamHelper::create(settings.sensorModel)); + if (!helper_) { + LOG(IPARPI, Error) << "Could not create camera helper for " + << settings.sensorModel; + return -EINVAL; + } + + /* + * Pass out the sensor config to the pipeline handler in order + * to setup the staggered writer class. + */ + int gainDelay, exposureDelay, vblankDelay, hblankDelay, sensorMetadata; + helper_->getDelays(exposureDelay, gainDelay, vblankDelay, hblankDelay); + sensorMetadata = helper_->sensorEmbeddedDataPresent(); + + result->sensorConfig.gainDelay = gainDelay; + result->sensorConfig.exposureDelay = exposureDelay; + result->sensorConfig.vblankDelay = vblankDelay; + result->sensorConfig.hblankDelay = hblankDelay; + result->sensorConfig.sensorMetadata = sensorMetadata; + + /* Load the tuning file for this sensor. */ + int ret = controller_.read(settings.configurationFile.c_str()); + if (ret) { + LOG(IPARPI, Error) + << "Failed to load tuning data file " + << settings.configurationFile; + return ret; + } + + const std::string &target = controller_.getTarget(); + if (target != "bcm2835") { + LOG(IPARPI, Error) + << "Tuning data file target returned \"" << target << "\"" + << ", expected \"bcm2835\""; + return -EINVAL; + } + + lensPresent_ = lensPresent; + + controller_.initialise(); + + /* Return the controls handled by the IPA */ + ControlInfoMap::Map ctrlMap = ipaControls; + if (lensPresent_) + ctrlMap.merge(ControlInfoMap::Map(ipaAfControls)); + result->controlInfo = ControlInfoMap(std::move(ctrlMap), controls::controls); + + return 0; +} + +void IPARPi::start(const ControlList &controls, StartConfig *startConfig) +{ + RPiController::Metadata metadata; + + ASSERT(startConfig); + if (!controls.empty()) { + /* We have been given some controls to action before start. */ + queueRequest(controls); + } + + controller_.switchMode(mode_, &metadata); + + /* Reset the frame lengths queue state. */ + lastTimeout_ = 0s; + frameLengths_.clear(); + frameLengths_.resize(FrameLengthsQueueSize, 0s); + + /* SwitchMode may supply updated exposure/gain values to use. */ + AgcStatus agcStatus; + agcStatus.shutterTime = 0.0s; + agcStatus.analogueGain = 0.0; + + metadata.get("agc.status", agcStatus); + if (agcStatus.shutterTime && agcStatus.analogueGain) { + ControlList ctrls(sensorCtrls_); + applyAGC(&agcStatus, ctrls); + startConfig->controls = std::move(ctrls); + setCameraTimeoutValue(); + } + + /* + * Initialise frame counts, and decide how many frames must be hidden or + * "mistrusted", which depends on whether this is a startup from cold, + * or merely a mode switch in a running system. + */ + frameCount_ = 0; + checkCount_ = 0; + if (firstStart_) { + dropFrameCount_ = helper_->hideFramesStartup(); + mistrustCount_ = helper_->mistrustFramesStartup(); + + /* + * Query the AGC/AWB for how many frames they may take to + * converge sufficiently. Where these numbers are non-zero + * we must allow for the frames with bad statistics + * (mistrustCount_) that they won't see. But if zero (i.e. + * no convergence necessary), no frames need to be dropped. + */ + unsigned int agcConvergenceFrames = 0; + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (agc) { + agcConvergenceFrames = agc->getConvergenceFrames(); + if (agcConvergenceFrames) + agcConvergenceFrames += mistrustCount_; + } + + unsigned int awbConvergenceFrames = 0; + RPiController::AwbAlgorithm *awb = dynamic_cast( + controller_.getAlgorithm("awb")); + if (awb) { + awbConvergenceFrames = awb->getConvergenceFrames(); + if (awbConvergenceFrames) + awbConvergenceFrames += mistrustCount_; + } + + dropFrameCount_ = std::max({ dropFrameCount_, agcConvergenceFrames, awbConvergenceFrames }); + LOG(IPARPI, Debug) << "Drop " << dropFrameCount_ << " frames on startup"; + } else { + dropFrameCount_ = helper_->hideFramesModeSwitch(); + mistrustCount_ = helper_->mistrustFramesModeSwitch(); + } + + startConfig->dropFrameCount = dropFrameCount_; + + firstStart_ = false; + lastRunTimestamp_ = 0; +} + +void IPARPi::setMode(const IPACameraSensorInfo &sensorInfo) +{ + mode_.bitdepth = sensorInfo.bitsPerPixel; + mode_.width = sensorInfo.outputSize.width; + mode_.height = sensorInfo.outputSize.height; + mode_.sensorWidth = sensorInfo.activeAreaSize.width; + mode_.sensorHeight = sensorInfo.activeAreaSize.height; + mode_.cropX = sensorInfo.analogCrop.x; + mode_.cropY = sensorInfo.analogCrop.y; + mode_.pixelRate = sensorInfo.pixelRate; + + /* + * Calculate scaling parameters. The scale_[xy] factors are determined + * by the ratio between the crop rectangle size and the output size. + */ + mode_.scaleX = sensorInfo.analogCrop.width / sensorInfo.outputSize.width; + mode_.scaleY = sensorInfo.analogCrop.height / sensorInfo.outputSize.height; + + /* + * We're not told by the pipeline handler how scaling is split between + * binning and digital scaling. For now, as a heuristic, assume that + * downscaling up to 2 is achieved through binning, and that any + * additional scaling is achieved through digital scaling. + * + * \todo Get the pipeline handle to provide the full data + */ + mode_.binX = std::min(2, static_cast(mode_.scaleX)); + mode_.binY = std::min(2, static_cast(mode_.scaleY)); + + /* The noise factor is the square root of the total binning factor. */ + mode_.noiseFactor = sqrt(mode_.binX * mode_.binY); + + /* + * Calculate the line length as the ratio between the line length in + * pixels and the pixel rate. + */ + mode_.minLineLength = sensorInfo.minLineLength * (1.0s / sensorInfo.pixelRate); + mode_.maxLineLength = sensorInfo.maxLineLength * (1.0s / sensorInfo.pixelRate); + + /* + * Set the frame length limits for the mode to ensure exposure and + * framerate calculations are clipped appropriately. + */ + mode_.minFrameLength = sensorInfo.minFrameLength; + mode_.maxFrameLength = sensorInfo.maxFrameLength; + + /* Store these for convenience. */ + mode_.minFrameDuration = mode_.minFrameLength * mode_.minLineLength; + mode_.maxFrameDuration = mode_.maxFrameLength * mode_.maxLineLength; + + /* + * Some sensors may have different sensitivities in different modes; + * the CamHelper will know the correct value. + */ + mode_.sensitivity = helper_->getModeSensitivity(mode_); + + const ControlInfo &gainCtrl = sensorCtrls_.at(V4L2_CID_ANALOGUE_GAIN); + const ControlInfo &shutterCtrl = sensorCtrls_.at(V4L2_CID_EXPOSURE); + + mode_.minAnalogueGain = helper_->gain(gainCtrl.min().get()); + mode_.maxAnalogueGain = helper_->gain(gainCtrl.max().get()); + + /* Shutter speed is calculated based on the limits of the frame durations. */ + mode_.minShutter = helper_->exposure(shutterCtrl.min().get(), mode_.minLineLength); + mode_.maxShutter = Duration::max(); + helper_->getBlanking(mode_.maxShutter, + mode_.minFrameDuration, mode_.maxFrameDuration); +} + +int IPARPi::configure(const IPACameraSensorInfo &sensorInfo, const IPAConfig &ipaConfig, + ControlList *controls, IPAConfigResult *result) +{ + sensorCtrls_ = ipaConfig.sensorControls; + ispCtrls_ = ipaConfig.ispControls; + + if (!validateSensorControls()) { + LOG(IPARPI, Error) << "Sensor control validation failed."; + return -1; + } + + if (!validateIspControls()) { + LOG(IPARPI, Error) << "ISP control validation failed."; + return -1; + } + + if (lensPresent_) { + lensCtrls_ = ipaConfig.lensControls; + if (!validateLensControls()) { + LOG(IPARPI, Warning) << "Lens validation failed, " + << "no lens control will be available."; + lensPresent_ = false; + } + } + + /* Setup a metadata ControlList to output metadata. */ + libcameraMetadata_ = ControlList(controls::controls); + + /* Re-assemble camera mode using the sensor info. */ + setMode(sensorInfo); + + mode_.transform = static_cast(ipaConfig.transform); + + /* Store the lens shading table pointer and handle if available. */ + if (ipaConfig.lsTableHandle.isValid()) { + /* Remove any previous table, if there was one. */ + if (lsTable_) { + munmap(lsTable_, MaxLsGridSize); + lsTable_ = nullptr; + } + + /* Map the LS table buffer into user space. */ + lsTableHandle_ = std::move(ipaConfig.lsTableHandle); + if (lsTableHandle_.isValid()) { + lsTable_ = mmap(nullptr, MaxLsGridSize, PROT_READ | PROT_WRITE, + MAP_SHARED, lsTableHandle_.get(), 0); + + if (lsTable_ == MAP_FAILED) { + LOG(IPARPI, Error) << "dmaHeap mmap failure for LS table."; + lsTable_ = nullptr; + } + } + } + + /* Pass the camera mode to the CamHelper to setup algorithms. */ + helper_->setCameraMode(mode_); + + /* + * Initialise this ControlList correctly, even if empty, in case the IPA is + * running is isolation mode (passing the ControlList through the IPC layer). + */ + ControlList ctrls(sensorCtrls_); + + /* The pipeline handler passes out the mode's sensitivity. */ + result->modeSensitivity = mode_.sensitivity; + + if (firstStart_) { + /* Supply initial values for frame durations. */ + applyFrameDurations(defaultMinFrameDuration, defaultMaxFrameDuration); + + /* Supply initial values for gain and exposure. */ + AgcStatus agcStatus; + agcStatus.shutterTime = defaultExposureTime; + agcStatus.analogueGain = defaultAnalogueGain; + applyAGC(&agcStatus, ctrls); + } + + ASSERT(controls); + *controls = std::move(ctrls); + + /* + * Apply the correct limits to the exposure, gain and frame duration controls + * based on the current sensor mode. + */ + ControlInfoMap::Map ctrlMap = ipaControls; + ctrlMap[&controls::FrameDurationLimits] = + ControlInfo(static_cast(mode_.minFrameDuration.get()), + static_cast(mode_.maxFrameDuration.get())); + + ctrlMap[&controls::AnalogueGain] = + ControlInfo(static_cast(mode_.minAnalogueGain), + static_cast(mode_.maxAnalogueGain)); + + ctrlMap[&controls::ExposureTime] = + ControlInfo(static_cast(mode_.minShutter.get()), + static_cast(mode_.maxShutter.get())); + + /* Declare Autofocus controls, only if we have a controllable lens */ + if (lensPresent_) + ctrlMap.merge(ControlInfoMap::Map(ipaAfControls)); + + result->controlInfo = ControlInfoMap(std::move(ctrlMap), controls::controls); + return 0; +} + +void IPARPi::mapBuffers(const std::vector &buffers) +{ + for (const IPABuffer &buffer : buffers) { + const FrameBuffer fb(buffer.planes); + buffers_.emplace(buffer.id, + MappedFrameBuffer(&fb, MappedFrameBuffer::MapFlag::ReadWrite)); + } +} + +void IPARPi::unmapBuffers(const std::vector &ids) +{ + for (unsigned int id : ids) { + auto it = buffers_.find(id); + if (it == buffers_.end()) + continue; + + buffers_.erase(id); + } +} + +void IPARPi::signalStatReady(uint32_t bufferId, uint32_t ipaContext) +{ + unsigned int context = ipaContext % rpiMetadata_.size(); + + if (++checkCount_ != frameCount_) /* assert here? */ + LOG(IPARPI, Error) << "WARNING: Prepare/Process mismatch!!!"; + if (processPending_ && frameCount_ > mistrustCount_) + processStats(bufferId, context); + + reportMetadata(context); + + statsMetadataComplete.emit(bufferId, libcameraMetadata_); +} + +void IPARPi::signalQueueRequest(const ControlList &controls) +{ + queueRequest(controls); +} + +void IPARPi::signalIspPrepare(const ISPConfig &data) +{ + /* + * At start-up, or after a mode-switch, we may want to + * avoid running the control algos for a few frames in case + * they are "unreliable". + */ + prepareISP(data); + frameCount_++; + + /* Ready to push the input buffer into the ISP. */ + runIsp.emit(data.bayerBufferId); +} + +void IPARPi::reportMetadata(unsigned int ipaContext) +{ + RPiController::Metadata &rpiMetadata = rpiMetadata_[ipaContext]; + std::unique_lock lock(rpiMetadata); + + /* + * Certain information about the current frame and how it will be + * processed can be extracted and placed into the libcamera metadata + * buffer, where an application could query it. + */ + DeviceStatus *deviceStatus = rpiMetadata.getLocked("device.status"); + if (deviceStatus) { + libcameraMetadata_.set(controls::ExposureTime, + deviceStatus->shutterSpeed.get()); + libcameraMetadata_.set(controls::AnalogueGain, deviceStatus->analogueGain); + libcameraMetadata_.set(controls::FrameDuration, + helper_->exposure(deviceStatus->frameLength, deviceStatus->lineLength).get()); + if (deviceStatus->sensorTemperature) + libcameraMetadata_.set(controls::SensorTemperature, *deviceStatus->sensorTemperature); + if (deviceStatus->lensPosition) + libcameraMetadata_.set(controls::LensPosition, *deviceStatus->lensPosition); + } + + AgcStatus *agcStatus = rpiMetadata.getLocked("agc.status"); + if (agcStatus) { + libcameraMetadata_.set(controls::AeLocked, agcStatus->locked); + libcameraMetadata_.set(controls::DigitalGain, agcStatus->digitalGain); + } + + LuxStatus *luxStatus = rpiMetadata.getLocked("lux.status"); + if (luxStatus) + libcameraMetadata_.set(controls::Lux, luxStatus->lux); + + AwbStatus *awbStatus = rpiMetadata.getLocked("awb.status"); + if (awbStatus) { + libcameraMetadata_.set(controls::ColourGains, { static_cast(awbStatus->gainR), + static_cast(awbStatus->gainB) }); + libcameraMetadata_.set(controls::ColourTemperature, awbStatus->temperatureK); + } + + BlackLevelStatus *blackLevelStatus = rpiMetadata.getLocked("black_level.status"); + if (blackLevelStatus) + libcameraMetadata_.set(controls::SensorBlackLevels, + { static_cast(blackLevelStatus->blackLevelR), + static_cast(blackLevelStatus->blackLevelG), + static_cast(blackLevelStatus->blackLevelG), + static_cast(blackLevelStatus->blackLevelB) }); + + RPiController::FocusRegions *focusStatus = + rpiMetadata.getLocked("focus.status"); + if (focusStatus) { + /* + * Calculate the average FoM over the central (symmetric) positions + * to give an overall scene FoM. This can change later if it is + * not deemed suitable. + */ + libcamera::Size size = focusStatus->size(); + unsigned rows = size.height; + unsigned cols = size.width; + + uint64_t sum = 0; + unsigned int numRegions = 0; + for (unsigned r = rows / 3; r < rows - rows / 3; ++r) { + for (unsigned c = cols / 4; c < cols - cols / 4; ++c) { + sum += focusStatus->get({ (int)c, (int)r }).val; + numRegions++; + } + } + + uint32_t focusFoM = (sum / numRegions) >> 16; + libcameraMetadata_.set(controls::FocusFoM, focusFoM); + } + + CcmStatus *ccmStatus = rpiMetadata.getLocked("ccm.status"); + if (ccmStatus) { + float m[9]; + for (unsigned int i = 0; i < 9; i++) + m[i] = ccmStatus->matrix[i]; + libcameraMetadata_.set(controls::ColourCorrectionMatrix, m); + } + + const AfStatus *afStatus = rpiMetadata.getLocked("af.status"); + if (afStatus) { + int32_t s, p; + switch (afStatus->state) { + case AfState::Scanning: + s = controls::AfStateScanning; + break; + case AfState::Focused: + s = controls::AfStateFocused; + break; + case AfState::Failed: + s = controls::AfStateFailed; + break; + default: + s = controls::AfStateIdle; + } + switch (afStatus->pauseState) { + case AfPauseState::Pausing: + p = controls::AfPauseStatePausing; + break; + case AfPauseState::Paused: + p = controls::AfPauseStatePaused; + break; + default: + p = controls::AfPauseStateRunning; + } + libcameraMetadata_.set(controls::AfState, s); + libcameraMetadata_.set(controls::AfPauseState, p); + } +} + +bool IPARPi::validateSensorControls() +{ + static const uint32_t ctrls[] = { + V4L2_CID_ANALOGUE_GAIN, + V4L2_CID_EXPOSURE, + V4L2_CID_VBLANK, + V4L2_CID_HBLANK, + }; + + for (auto c : ctrls) { + if (sensorCtrls_.find(c) == sensorCtrls_.end()) { + LOG(IPARPI, Error) << "Unable to find sensor control " + << utils::hex(c); + return false; + } + } + + return true; +} + +bool IPARPi::validateIspControls() +{ + static const uint32_t ctrls[] = { + V4L2_CID_RED_BALANCE, + V4L2_CID_BLUE_BALANCE, + V4L2_CID_DIGITAL_GAIN, + V4L2_CID_USER_BCM2835_ISP_CC_MATRIX, + V4L2_CID_USER_BCM2835_ISP_GAMMA, + V4L2_CID_USER_BCM2835_ISP_BLACK_LEVEL, + V4L2_CID_USER_BCM2835_ISP_GEQ, + V4L2_CID_USER_BCM2835_ISP_DENOISE, + V4L2_CID_USER_BCM2835_ISP_SHARPEN, + V4L2_CID_USER_BCM2835_ISP_DPC, + V4L2_CID_USER_BCM2835_ISP_LENS_SHADING, + V4L2_CID_USER_BCM2835_ISP_CDN, + }; + + for (auto c : ctrls) { + if (ispCtrls_.find(c) == ispCtrls_.end()) { + LOG(IPARPI, Error) << "Unable to find ISP control " + << utils::hex(c); + return false; + } + } + + return true; +} + +bool IPARPi::validateLensControls() +{ + if (lensCtrls_.find(V4L2_CID_FOCUS_ABSOLUTE) == lensCtrls_.end()) { + LOG(IPARPI, Error) << "Unable to find Lens control V4L2_CID_FOCUS_ABSOLUTE"; + return false; + } + + return true; +} + +/* + * Converting between enums (used in the libcamera API) and the names that + * we use to identify different modes. Unfortunately, the conversion tables + * must be kept up-to-date by hand. + */ +static const std::map MeteringModeTable = { + { controls::MeteringCentreWeighted, "centre-weighted" }, + { controls::MeteringSpot, "spot" }, + { controls::MeteringMatrix, "matrix" }, + { controls::MeteringCustom, "custom" }, +}; + +static const std::map ConstraintModeTable = { + { controls::ConstraintNormal, "normal" }, + { controls::ConstraintHighlight, "highlight" }, + { controls::ConstraintShadows, "shadows" }, + { controls::ConstraintCustom, "custom" }, +}; + +static const std::map ExposureModeTable = { + { controls::ExposureNormal, "normal" }, + { controls::ExposureShort, "short" }, + { controls::ExposureLong, "long" }, + { controls::ExposureCustom, "custom" }, +}; + +static const std::map AwbModeTable = { + { controls::AwbAuto, "auto" }, + { controls::AwbIncandescent, "incandescent" }, + { controls::AwbTungsten, "tungsten" }, + { controls::AwbFluorescent, "fluorescent" }, + { controls::AwbIndoor, "indoor" }, + { controls::AwbDaylight, "daylight" }, + { controls::AwbCloudy, "cloudy" }, + { controls::AwbCustom, "custom" }, +}; + +static const std::map DenoiseModeTable = { + { controls::draft::NoiseReductionModeOff, RPiController::DenoiseMode::Off }, + { controls::draft::NoiseReductionModeFast, RPiController::DenoiseMode::ColourFast }, + { controls::draft::NoiseReductionModeHighQuality, RPiController::DenoiseMode::ColourHighQuality }, + { controls::draft::NoiseReductionModeMinimal, RPiController::DenoiseMode::ColourOff }, + { controls::draft::NoiseReductionModeZSL, RPiController::DenoiseMode::ColourHighQuality }, +}; + +static const std::map AfModeTable = { + { controls::AfModeManual, RPiController::AfAlgorithm::AfModeManual }, + { controls::AfModeAuto, RPiController::AfAlgorithm::AfModeAuto }, + { controls::AfModeContinuous, RPiController::AfAlgorithm::AfModeContinuous }, +}; + +static const std::map AfRangeTable = { + { controls::AfRangeNormal, RPiController::AfAlgorithm::AfRangeNormal }, + { controls::AfRangeMacro, RPiController::AfAlgorithm::AfRangeMacro }, + { controls::AfRangeFull, RPiController::AfAlgorithm::AfRangeFull }, +}; + +static const std::map AfPauseTable = { + { controls::AfPauseImmediate, RPiController::AfAlgorithm::AfPauseImmediate }, + { controls::AfPauseDeferred, RPiController::AfAlgorithm::AfPauseDeferred }, + { controls::AfPauseResume, RPiController::AfAlgorithm::AfPauseResume }, +}; + +void IPARPi::queueRequest(const ControlList &controls) +{ + using RPiController::AfAlgorithm; + + /* Clear the return metadata buffer. */ + libcameraMetadata_.clear(); + + /* Because some AF controls are mode-specific, handle AF mode change first. */ + if (controls.contains(controls::AF_MODE)) { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af) { + LOG(IPARPI, Warning) + << "Could not set AF_MODE - no AF algorithm"; + } + + int32_t idx = controls.get(controls::AF_MODE).get(); + auto mode = AfModeTable.find(idx); + if (mode == AfModeTable.end()) { + LOG(IPARPI, Error) << "AF mode " << idx + << " not recognised"; + } else + af->setMode(mode->second); + } + + /* Iterate over controls */ + for (auto const &ctrl : controls) { + LOG(IPARPI, Debug) << "Request ctrl: " + << controls::controls.at(ctrl.first)->name() + << " = " << ctrl.second.toString(); + + switch (ctrl.first) { + case controls::AE_ENABLE: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set AE_ENABLE - no AGC algorithm"; + break; + } + + if (ctrl.second.get() == false) + agc->disableAuto(); + else + agc->enableAuto(); + + libcameraMetadata_.set(controls::AeEnable, ctrl.second.get()); + break; + } + + case controls::EXPOSURE_TIME: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set EXPOSURE_TIME - no AGC algorithm"; + break; + } + + /* The control provides units of microseconds. */ + agc->setFixedShutter(ctrl.second.get() * 1.0us); + + libcameraMetadata_.set(controls::ExposureTime, ctrl.second.get()); + break; + } + + case controls::ANALOGUE_GAIN: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set ANALOGUE_GAIN - no AGC algorithm"; + break; + } + + agc->setFixedAnalogueGain(ctrl.second.get()); + + libcameraMetadata_.set(controls::AnalogueGain, + ctrl.second.get()); + break; + } + + case controls::AE_METERING_MODE: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set AE_METERING_MODE - no AGC algorithm"; + break; + } + + int32_t idx = ctrl.second.get(); + if (MeteringModeTable.count(idx)) { + agc->setMeteringMode(MeteringModeTable.at(idx)); + libcameraMetadata_.set(controls::AeMeteringMode, idx); + } else { + LOG(IPARPI, Error) << "Metering mode " << idx + << " not recognised"; + } + break; + } + + case controls::AE_CONSTRAINT_MODE: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set AE_CONSTRAINT_MODE - no AGC algorithm"; + break; + } + + int32_t idx = ctrl.second.get(); + if (ConstraintModeTable.count(idx)) { + agc->setConstraintMode(ConstraintModeTable.at(idx)); + libcameraMetadata_.set(controls::AeConstraintMode, idx); + } else { + LOG(IPARPI, Error) << "Constraint mode " << idx + << " not recognised"; + } + break; + } + + case controls::AE_EXPOSURE_MODE: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set AE_EXPOSURE_MODE - no AGC algorithm"; + break; + } + + int32_t idx = ctrl.second.get(); + if (ExposureModeTable.count(idx)) { + agc->setExposureMode(ExposureModeTable.at(idx)); + libcameraMetadata_.set(controls::AeExposureMode, idx); + } else { + LOG(IPARPI, Error) << "Exposure mode " << idx + << " not recognised"; + } + break; + } + + case controls::EXPOSURE_VALUE: { + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + if (!agc) { + LOG(IPARPI, Warning) + << "Could not set EXPOSURE_VALUE - no AGC algorithm"; + break; + } + + /* + * The SetEv() function takes in a direct exposure multiplier. + * So convert to 2^EV + */ + double ev = pow(2.0, ctrl.second.get()); + agc->setEv(ev); + libcameraMetadata_.set(controls::ExposureValue, + ctrl.second.get()); + break; + } + + case controls::AWB_ENABLE: { + RPiController::AwbAlgorithm *awb = dynamic_cast( + controller_.getAlgorithm("awb")); + if (!awb) { + LOG(IPARPI, Warning) + << "Could not set AWB_ENABLE - no AWB algorithm"; + break; + } + + if (ctrl.second.get() == false) + awb->disableAuto(); + else + awb->enableAuto(); + + libcameraMetadata_.set(controls::AwbEnable, + ctrl.second.get()); + break; + } + + case controls::AWB_MODE: { + RPiController::AwbAlgorithm *awb = dynamic_cast( + controller_.getAlgorithm("awb")); + if (!awb) { + LOG(IPARPI, Warning) + << "Could not set AWB_MODE - no AWB algorithm"; + break; + } + + int32_t idx = ctrl.second.get(); + if (AwbModeTable.count(idx)) { + awb->setMode(AwbModeTable.at(idx)); + libcameraMetadata_.set(controls::AwbMode, idx); + } else { + LOG(IPARPI, Error) << "AWB mode " << idx + << " not recognised"; + } + break; + } + + case controls::COLOUR_GAINS: { + auto gains = ctrl.second.get>(); + RPiController::AwbAlgorithm *awb = dynamic_cast( + controller_.getAlgorithm("awb")); + if (!awb) { + LOG(IPARPI, Warning) + << "Could not set COLOUR_GAINS - no AWB algorithm"; + break; + } + + awb->setManualGains(gains[0], gains[1]); + if (gains[0] != 0.0f && gains[1] != 0.0f) + /* A gain of 0.0f will switch back to auto mode. */ + libcameraMetadata_.set(controls::ColourGains, + { gains[0], gains[1] }); + break; + } + + case controls::BRIGHTNESS: { + RPiController::ContrastAlgorithm *contrast = dynamic_cast( + controller_.getAlgorithm("contrast")); + if (!contrast) { + LOG(IPARPI, Warning) + << "Could not set BRIGHTNESS - no contrast algorithm"; + break; + } + + contrast->setBrightness(ctrl.second.get() * 65536); + libcameraMetadata_.set(controls::Brightness, + ctrl.second.get()); + break; + } + + case controls::CONTRAST: { + RPiController::ContrastAlgorithm *contrast = dynamic_cast( + controller_.getAlgorithm("contrast")); + if (!contrast) { + LOG(IPARPI, Warning) + << "Could not set CONTRAST - no contrast algorithm"; + break; + } + + contrast->setContrast(ctrl.second.get()); + libcameraMetadata_.set(controls::Contrast, + ctrl.second.get()); + break; + } + + case controls::SATURATION: { + RPiController::CcmAlgorithm *ccm = dynamic_cast( + controller_.getAlgorithm("ccm")); + if (!ccm) { + LOG(IPARPI, Warning) + << "Could not set SATURATION - no ccm algorithm"; + break; + } + + ccm->setSaturation(ctrl.second.get()); + libcameraMetadata_.set(controls::Saturation, + ctrl.second.get()); + break; + } + + case controls::SHARPNESS: { + RPiController::SharpenAlgorithm *sharpen = dynamic_cast( + controller_.getAlgorithm("sharpen")); + if (!sharpen) { + LOG(IPARPI, Warning) + << "Could not set SHARPNESS - no sharpen algorithm"; + break; + } + + sharpen->setStrength(ctrl.second.get()); + libcameraMetadata_.set(controls::Sharpness, + ctrl.second.get()); + break; + } + + case controls::SCALER_CROP: { + /* We do nothing with this, but should avoid the warning below. */ + break; + } + + case controls::FRAME_DURATION_LIMITS: { + auto frameDurations = ctrl.second.get>(); + applyFrameDurations(frameDurations[0] * 1.0us, frameDurations[1] * 1.0us); + break; + } + + case controls::NOISE_REDUCTION_MODE: { + RPiController::DenoiseAlgorithm *sdn = dynamic_cast( + controller_.getAlgorithm("SDN")); + if (!sdn) { + LOG(IPARPI, Warning) + << "Could not set NOISE_REDUCTION_MODE - no SDN algorithm"; + break; + } + + int32_t idx = ctrl.second.get(); + auto mode = DenoiseModeTable.find(idx); + if (mode != DenoiseModeTable.end()) { + sdn->setMode(mode->second); + + /* + * \todo If the colour denoise is not going to run due to an + * analysis image resolution or format mismatch, we should + * report the status correctly in the metadata. + */ + libcameraMetadata_.set(controls::draft::NoiseReductionMode, idx); + } else { + LOG(IPARPI, Error) << "Noise reduction mode " << idx + << " not recognised"; + } + break; + } + + case controls::AF_MODE: + break; /* We already handled this one above */ + + case controls::AF_RANGE: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af) { + LOG(IPARPI, Warning) + << "Could not set AF_RANGE - no focus algorithm"; + break; + } + + auto range = AfRangeTable.find(ctrl.second.get()); + if (range == AfRangeTable.end()) { + LOG(IPARPI, Error) << "AF range " << ctrl.second.get() + << " not recognised"; + break; + } + af->setRange(range->second); + break; + } + + case controls::AF_SPEED: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af) { + LOG(IPARPI, Warning) + << "Could not set AF_SPEED - no focus algorithm"; + break; + } + + AfAlgorithm::AfSpeed speed = ctrl.second.get() == controls::AfSpeedFast ? + AfAlgorithm::AfSpeedFast : AfAlgorithm::AfSpeedNormal; + af->setSpeed(speed); + break; + } + + case controls::AF_METERING: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af) { + LOG(IPARPI, Warning) + << "Could not set AF_METERING - no AF algorithm"; + break; + } + af->setMetering(ctrl.second.get() == controls::AfMeteringWindows); + break; + } + + case controls::AF_WINDOWS: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af) { + LOG(IPARPI, Warning) + << "Could not set AF_WINDOWS - no AF algorithm"; + break; + } + af->setWindows(ctrl.second.get>()); + break; + } + + case controls::AF_PAUSE: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af || af->getMode() != AfAlgorithm::AfModeContinuous) { + LOG(IPARPI, Warning) + << "Could not set AF_PAUSE - no AF algorithm or not Continuous"; + break; + } + auto pause = AfPauseTable.find(ctrl.second.get()); + if (pause == AfPauseTable.end()) { + LOG(IPARPI, Error) << "AF pause " << ctrl.second.get() + << " not recognised"; + break; + } + af->pause(pause->second); + break; + } + + case controls::AF_TRIGGER: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (!af || af->getMode() != AfAlgorithm::AfModeAuto) { + LOG(IPARPI, Warning) + << "Could not set AF_TRIGGER - no AF algorithm or not Auto"; + break; + } else { + if (ctrl.second.get() == controls::AfTriggerStart) + af->triggerScan(); + else + af->cancelScan(); + } + break; + } + + case controls::LENS_POSITION: { + AfAlgorithm *af = dynamic_cast(controller_.getAlgorithm("af")); + if (af) { + int32_t hwpos; + if (af->setLensPosition(ctrl.second.get(), &hwpos)) { + ControlList lensCtrls(lensCtrls_); + lensCtrls.set(V4L2_CID_FOCUS_ABSOLUTE, hwpos); + setLensControls.emit(lensCtrls); + } + } else { + LOG(IPARPI, Warning) + << "Could not set LENS_POSITION - no AF algorithm"; + } + break; + } + + default: + LOG(IPARPI, Warning) + << "Ctrl " << controls::controls.at(ctrl.first)->name() + << " is not handled."; + break; + } + } +} + +void IPARPi::returnEmbeddedBuffer(unsigned int bufferId) +{ + embeddedComplete.emit(bufferId); +} + +void IPARPi::prepareISP(const ISPConfig &data) +{ + int64_t frameTimestamp = data.controls.get(controls::SensorTimestamp).value_or(0); + unsigned int ipaContext = data.ipaContext % rpiMetadata_.size(); + RPiController::Metadata &rpiMetadata = rpiMetadata_[ipaContext]; + Span embeddedBuffer; + + rpiMetadata.clear(); + fillDeviceStatus(data.controls, ipaContext); + + if (data.embeddedBufferPresent) { + /* + * Pipeline handler has supplied us with an embedded data buffer, + * we must pass it to the CamHelper for parsing. + */ + auto it = buffers_.find(data.embeddedBufferId); + ASSERT(it != buffers_.end()); + embeddedBuffer = it->second.planes()[0]; + } + + /* + * AGC wants to know the algorithm status from the time it actioned the + * sensor exposure/gain changes. So fetch it from the metadata list + * indexed by the IPA cookie returned, and put it in the current frame + * metadata. + */ + AgcStatus agcStatus; + RPiController::Metadata &delayedMetadata = rpiMetadata_[data.delayContext]; + if (!delayedMetadata.get("agc.status", agcStatus)) + rpiMetadata.set("agc.delayed_status", agcStatus); + + /* + * This may overwrite the DeviceStatus using values from the sensor + * metadata, and may also do additional custom processing. + */ + helper_->prepare(embeddedBuffer, rpiMetadata); + + /* Done with embedded data now, return to pipeline handler asap. */ + if (data.embeddedBufferPresent) + returnEmbeddedBuffer(data.embeddedBufferId); + + /* Allow a 10% margin on the comparison below. */ + Duration delta = (frameTimestamp - lastRunTimestamp_) * 1.0ns; + if (lastRunTimestamp_ && frameCount_ > dropFrameCount_ && + delta < controllerMinFrameDuration * 0.9) { + /* + * Ensure we merge the previous frame's metadata with the current + * frame. This will not overwrite exposure/gain values for the + * current frame, or any other bits of metadata that were added + * in helper_->Prepare(). + */ + RPiController::Metadata &lastMetadata = + rpiMetadata_[(ipaContext ? ipaContext : rpiMetadata_.size()) - 1]; + rpiMetadata.mergeCopy(lastMetadata); + processPending_ = false; + return; + } + + lastRunTimestamp_ = frameTimestamp; + processPending_ = true; + + ControlList ctrls(ispCtrls_); + + controller_.prepare(&rpiMetadata); + + /* Lock the metadata buffer to avoid constant locks/unlocks. */ + std::unique_lock lock(rpiMetadata); + + AwbStatus *awbStatus = rpiMetadata.getLocked("awb.status"); + if (awbStatus) + applyAWB(awbStatus, ctrls); + + CcmStatus *ccmStatus = rpiMetadata.getLocked("ccm.status"); + if (ccmStatus) + applyCCM(ccmStatus, ctrls); + + AgcStatus *dgStatus = rpiMetadata.getLocked("agc.status"); + if (dgStatus) + applyDG(dgStatus, ctrls); + + AlscStatus *lsStatus = rpiMetadata.getLocked("alsc.status"); + if (lsStatus) + applyLS(lsStatus, ctrls); + + ContrastStatus *contrastStatus = rpiMetadata.getLocked("contrast.status"); + if (contrastStatus) + applyGamma(contrastStatus, ctrls); + + BlackLevelStatus *blackLevelStatus = rpiMetadata.getLocked("black_level.status"); + if (blackLevelStatus) + applyBlackLevel(blackLevelStatus, ctrls); + + GeqStatus *geqStatus = rpiMetadata.getLocked("geq.status"); + if (geqStatus) + applyGEQ(geqStatus, ctrls); + + DenoiseStatus *denoiseStatus = rpiMetadata.getLocked("denoise.status"); + if (denoiseStatus) + applyDenoise(denoiseStatus, ctrls); + + SharpenStatus *sharpenStatus = rpiMetadata.getLocked("sharpen.status"); + if (sharpenStatus) + applySharpen(sharpenStatus, ctrls); + + DpcStatus *dpcStatus = rpiMetadata.getLocked("dpc.status"); + if (dpcStatus) + applyDPC(dpcStatus, ctrls); + + const AfStatus *afStatus = rpiMetadata.getLocked("af.status"); + if (afStatus) { + ControlList lensctrls(lensCtrls_); + applyAF(afStatus, lensctrls); + if (!lensctrls.empty()) + setLensControls.emit(lensctrls); + } + + if (!ctrls.empty()) + setIspControls.emit(ctrls); +} + +void IPARPi::fillDeviceStatus(const ControlList &sensorControls, unsigned int ipaContext) +{ + DeviceStatus deviceStatus = {}; + + int32_t exposureLines = sensorControls.get(V4L2_CID_EXPOSURE).get(); + int32_t gainCode = sensorControls.get(V4L2_CID_ANALOGUE_GAIN).get(); + int32_t vblank = sensorControls.get(V4L2_CID_VBLANK).get(); + int32_t hblank = sensorControls.get(V4L2_CID_HBLANK).get(); + + deviceStatus.lineLength = helper_->hblankToLineLength(hblank); + deviceStatus.shutterSpeed = helper_->exposure(exposureLines, deviceStatus.lineLength); + deviceStatus.analogueGain = helper_->gain(gainCode); + deviceStatus.frameLength = mode_.height + vblank; + + RPiController::AfAlgorithm *af = dynamic_cast( + controller_.getAlgorithm("af")); + if (af) + deviceStatus.lensPosition = af->getLensPosition(); + + LOG(IPARPI, Debug) << "Metadata - " << deviceStatus; + + rpiMetadata_[ipaContext].set("device.status", deviceStatus); +} + +RPiController::StatisticsPtr IPARPi::fillStatistics(bcm2835_isp_stats *stats) const +{ + using namespace RPiController; + + const Controller::HardwareConfig &hw = controller_.getHardwareConfig(); + unsigned int i; + StatisticsPtr statistics = + std::make_unique(Statistics::AgcStatsPos::PreWb, Statistics::ColourStatsPos::PostLsc); + + /* RGB histograms are not used, so do not populate them. */ + statistics->yHist = RPiController::Histogram(stats->hist[0].g_hist, + hw.numHistogramBins); + + /* All region sums are based on a 16-bit normalised pipeline bit-depth. */ + unsigned int scale = Statistics::NormalisationFactorPow2 - hw.pipelineWidth; + + statistics->awbRegions.init(hw.awbRegions); + for (i = 0; i < statistics->awbRegions.numRegions(); i++) + statistics->awbRegions.set(i, { { stats->awb_stats[i].r_sum << scale, + stats->awb_stats[i].g_sum << scale, + stats->awb_stats[i].b_sum << scale }, + stats->awb_stats[i].counted, + stats->awb_stats[i].notcounted }); + + statistics->agcRegions.init(hw.agcRegions); + for (i = 0; i < statistics->agcRegions.numRegions(); i++) + statistics->agcRegions.set(i, { { stats->agc_stats[i].r_sum << scale, + stats->agc_stats[i].g_sum << scale, + stats->agc_stats[i].b_sum << scale }, + stats->agc_stats[i].counted, + stats->awb_stats[i].notcounted }); + + statistics->focusRegions.init(hw.focusRegions); + for (i = 0; i < statistics->focusRegions.numRegions(); i++) + statistics->focusRegions.set(i, { stats->focus_stats[i].contrast_val[1][1] / 1000, + stats->focus_stats[i].contrast_val_num[1][1], + stats->focus_stats[i].contrast_val_num[1][0] }); + return statistics; +} + +void IPARPi::processStats(unsigned int bufferId, unsigned int ipaContext) +{ + RPiController::Metadata &rpiMetadata = rpiMetadata_[ipaContext]; + + auto it = buffers_.find(bufferId); + if (it == buffers_.end()) { + LOG(IPARPI, Error) << "Could not find stats buffer!"; + return; + } + + Span mem = it->second.planes()[0]; + bcm2835_isp_stats *stats = reinterpret_cast(mem.data()); + RPiController::StatisticsPtr statistics = fillStatistics(stats); + + /* Save the focus stats in the metadata structure to report out later. */ + rpiMetadata_[ipaContext].set("focus.status", statistics->focusRegions); + + helper_->process(statistics, rpiMetadata); + controller_.process(statistics, &rpiMetadata); + + struct AgcStatus agcStatus; + if (rpiMetadata.get("agc.status", agcStatus) == 0) { + ControlList ctrls(sensorCtrls_); + applyAGC(&agcStatus, ctrls); + + setDelayedControls.emit(ctrls, ipaContext); + setCameraTimeoutValue(); + } +} + +void IPARPi::setCameraTimeoutValue() +{ + /* + * Take the maximum value of the exposure queue as the camera timeout + * value to pass back to the pipeline handler. Only signal if it has changed + * from the last set value. + */ + auto max = std::max_element(frameLengths_.begin(), frameLengths_.end()); + + if (*max != lastTimeout_) { + setCameraTimeout.emit(max->get()); + lastTimeout_ = *max; + } +} + +void IPARPi::applyAWB(const struct AwbStatus *awbStatus, ControlList &ctrls) +{ + LOG(IPARPI, Debug) << "Applying WB R: " << awbStatus->gainR << " B: " + << awbStatus->gainB; + + ctrls.set(V4L2_CID_RED_BALANCE, + static_cast(awbStatus->gainR * 1000)); + ctrls.set(V4L2_CID_BLUE_BALANCE, + static_cast(awbStatus->gainB * 1000)); +} + +void IPARPi::applyFrameDurations(Duration minFrameDuration, Duration maxFrameDuration) +{ + /* + * This will only be applied once AGC recalculations occur. + * The values may be clamped based on the sensor mode capabilities as well. + */ + minFrameDuration_ = minFrameDuration ? minFrameDuration : defaultMinFrameDuration; + maxFrameDuration_ = maxFrameDuration ? maxFrameDuration : defaultMaxFrameDuration; + minFrameDuration_ = std::clamp(minFrameDuration_, + mode_.minFrameDuration, mode_.maxFrameDuration); + maxFrameDuration_ = std::clamp(maxFrameDuration_, + mode_.minFrameDuration, mode_.maxFrameDuration); + maxFrameDuration_ = std::max(maxFrameDuration_, minFrameDuration_); + + /* Return the validated limits via metadata. */ + libcameraMetadata_.set(controls::FrameDurationLimits, + { static_cast(minFrameDuration_.get()), + static_cast(maxFrameDuration_.get()) }); + + /* + * Calculate the maximum exposure time possible for the AGC to use. + * getBlanking() will update maxShutter with the largest exposure + * value possible. + */ + Duration maxShutter = Duration::max(); + helper_->getBlanking(maxShutter, minFrameDuration_, maxFrameDuration_); + + RPiController::AgcAlgorithm *agc = dynamic_cast( + controller_.getAlgorithm("agc")); + agc->setMaxShutter(maxShutter); +} + +void IPARPi::applyAGC(const struct AgcStatus *agcStatus, ControlList &ctrls) +{ + const int32_t minGainCode = helper_->gainCode(mode_.minAnalogueGain); + const int32_t maxGainCode = helper_->gainCode(mode_.maxAnalogueGain); + int32_t gainCode = helper_->gainCode(agcStatus->analogueGain); + + /* + * Ensure anything larger than the max gain code will not be passed to + * DelayedControls. The AGC will correctly handle a lower gain returned + * by the sensor, provided it knows the actual gain used. + */ + gainCode = std::clamp(gainCode, minGainCode, maxGainCode); + + /* getBlanking might clip exposure time to the fps limits. */ + Duration exposure = agcStatus->shutterTime; + auto [vblank, hblank] = helper_->getBlanking(exposure, minFrameDuration_, maxFrameDuration_); + int32_t exposureLines = helper_->exposureLines(exposure, + helper_->hblankToLineLength(hblank)); + + LOG(IPARPI, Debug) << "Applying AGC Exposure: " << exposure + << " (Shutter lines: " << exposureLines << ", AGC requested " + << agcStatus->shutterTime << ") Gain: " + << agcStatus->analogueGain << " (Gain Code: " + << gainCode << ")"; + + ctrls.set(V4L2_CID_VBLANK, static_cast(vblank)); + ctrls.set(V4L2_CID_EXPOSURE, exposureLines); + ctrls.set(V4L2_CID_ANALOGUE_GAIN, gainCode); + + /* + * At present, there is no way of knowing if a control is read-only. + * As a workaround, assume that if the minimum and maximum values of + * the V4L2_CID_HBLANK control are the same, it implies the control + * is read-only. This seems to be the case for all the cameras our IPA + * works with. + * + * \todo The control API ought to have a flag to specify if a control + * is read-only which could be used below. + */ + if (mode_.minLineLength != mode_.maxLineLength) + ctrls.set(V4L2_CID_HBLANK, static_cast(hblank)); + + /* + * Store the frame length times in a circular queue, up-to FrameLengthsQueueSize + * elements. This will be used to advertise a camera timeout value to the + * pipeline handler. + */ + frameLengths_.pop_front(); + frameLengths_.push_back(helper_->exposure(vblank + mode_.height, + helper_->hblankToLineLength(hblank))); +} + +void IPARPi::applyDG(const struct AgcStatus *dgStatus, ControlList &ctrls) +{ + ctrls.set(V4L2_CID_DIGITAL_GAIN, + static_cast(dgStatus->digitalGain * 1000)); +} + +void IPARPi::applyCCM(const struct CcmStatus *ccmStatus, ControlList &ctrls) +{ + bcm2835_isp_custom_ccm ccm; + + for (int i = 0; i < 9; i++) { + ccm.ccm.ccm[i / 3][i % 3].den = 1000; + ccm.ccm.ccm[i / 3][i % 3].num = 1000 * ccmStatus->matrix[i]; + } + + ccm.enabled = 1; + ccm.ccm.offsets[0] = ccm.ccm.offsets[1] = ccm.ccm.offsets[2] = 0; + + ControlValue c(Span{ reinterpret_cast(&ccm), + sizeof(ccm) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_CC_MATRIX, c); +} + +void IPARPi::applyGamma(const struct ContrastStatus *contrastStatus, ControlList &ctrls) +{ + const unsigned int numGammaPoints = controller_.getHardwareConfig().numGammaPoints; + struct bcm2835_isp_gamma gamma; + + for (unsigned int i = 0; i < numGammaPoints - 1; i++) { + int x = i < 16 ? i * 1024 + : (i < 24 ? (i - 16) * 2048 + 16384 + : (i - 24) * 4096 + 32768); + gamma.x[i] = x; + gamma.y[i] = std::min(65535, contrastStatus->gammaCurve.eval(x)); + } + + gamma.x[numGammaPoints - 1] = 65535; + gamma.y[numGammaPoints - 1] = 65535; + gamma.enabled = 1; + + ControlValue c(Span{ reinterpret_cast(&gamma), + sizeof(gamma) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_GAMMA, c); +} + +void IPARPi::applyBlackLevel(const struct BlackLevelStatus *blackLevelStatus, ControlList &ctrls) +{ + bcm2835_isp_black_level blackLevel; + + blackLevel.enabled = 1; + blackLevel.black_level_r = blackLevelStatus->blackLevelR; + blackLevel.black_level_g = blackLevelStatus->blackLevelG; + blackLevel.black_level_b = blackLevelStatus->blackLevelB; + + ControlValue c(Span{ reinterpret_cast(&blackLevel), + sizeof(blackLevel) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_BLACK_LEVEL, c); +} + +void IPARPi::applyGEQ(const struct GeqStatus *geqStatus, ControlList &ctrls) +{ + bcm2835_isp_geq geq; + + geq.enabled = 1; + geq.offset = geqStatus->offset; + geq.slope.den = 1000; + geq.slope.num = 1000 * geqStatus->slope; + + ControlValue c(Span{ reinterpret_cast(&geq), + sizeof(geq) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_GEQ, c); +} + +void IPARPi::applyDenoise(const struct DenoiseStatus *denoiseStatus, ControlList &ctrls) +{ + using RPiController::DenoiseMode; + + bcm2835_isp_denoise denoise; + DenoiseMode mode = static_cast(denoiseStatus->mode); + + denoise.enabled = mode != DenoiseMode::Off; + denoise.constant = denoiseStatus->noiseConstant; + denoise.slope.num = 1000 * denoiseStatus->noiseSlope; + denoise.slope.den = 1000; + denoise.strength.num = 1000 * denoiseStatus->strength; + denoise.strength.den = 1000; + + /* Set the CDN mode to match the SDN operating mode. */ + bcm2835_isp_cdn cdn; + switch (mode) { + case DenoiseMode::ColourFast: + cdn.enabled = 1; + cdn.mode = CDN_MODE_FAST; + break; + case DenoiseMode::ColourHighQuality: + cdn.enabled = 1; + cdn.mode = CDN_MODE_HIGH_QUALITY; + break; + default: + cdn.enabled = 0; + } + + ControlValue c(Span{ reinterpret_cast(&denoise), + sizeof(denoise) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_DENOISE, c); + + c = ControlValue(Span{ reinterpret_cast(&cdn), + sizeof(cdn) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_CDN, c); +} + +void IPARPi::applySharpen(const struct SharpenStatus *sharpenStatus, ControlList &ctrls) +{ + bcm2835_isp_sharpen sharpen; + + sharpen.enabled = 1; + sharpen.threshold.num = 1000 * sharpenStatus->threshold; + sharpen.threshold.den = 1000; + sharpen.strength.num = 1000 * sharpenStatus->strength; + sharpen.strength.den = 1000; + sharpen.limit.num = 1000 * sharpenStatus->limit; + sharpen.limit.den = 1000; + + ControlValue c(Span{ reinterpret_cast(&sharpen), + sizeof(sharpen) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_SHARPEN, c); +} + +void IPARPi::applyDPC(const struct DpcStatus *dpcStatus, ControlList &ctrls) +{ + bcm2835_isp_dpc dpc; + + dpc.enabled = 1; + dpc.strength = dpcStatus->strength; + + ControlValue c(Span{ reinterpret_cast(&dpc), + sizeof(dpc) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_DPC, c); +} + +void IPARPi::applyLS(const struct AlscStatus *lsStatus, ControlList &ctrls) +{ + /* + * Program lens shading tables into pipeline. + * Choose smallest cell size that won't exceed 63x48 cells. + */ + const int cellSizes[] = { 16, 32, 64, 128, 256 }; + unsigned int numCells = std::size(cellSizes); + unsigned int i, w, h, cellSize; + for (i = 0; i < numCells; i++) { + cellSize = cellSizes[i]; + w = (mode_.width + cellSize - 1) / cellSize; + h = (mode_.height + cellSize - 1) / cellSize; + if (w < 64 && h <= 48) + break; + } + + if (i == numCells) { + LOG(IPARPI, Error) << "Cannot find cell size"; + return; + } + + /* We're going to supply corner sampled tables, 16 bit samples. */ + w++, h++; + bcm2835_isp_lens_shading ls = { + .enabled = 1, + .grid_cell_size = cellSize, + .grid_width = w, + .grid_stride = w, + .grid_height = h, + /* .dmabuf will be filled in by pipeline handler. */ + .dmabuf = 0, + .ref_transform = 0, + .corner_sampled = 1, + .gain_format = GAIN_FORMAT_U4P10 + }; + + if (!lsTable_ || w * h * 4 * sizeof(uint16_t) > MaxLsGridSize) { + LOG(IPARPI, Error) << "Do not have a correctly allocate lens shading table!"; + return; + } + + if (lsStatus) { + /* Format will be u4.10 */ + uint16_t *grid = static_cast(lsTable_); + + resampleTable(grid, lsStatus->r, w, h); + resampleTable(grid + w * h, lsStatus->g, w, h); + std::memcpy(grid + 2 * w * h, grid + w * h, w * h * sizeof(uint16_t)); + resampleTable(grid + 3 * w * h, lsStatus->b, w, h); + } + + ControlValue c(Span{ reinterpret_cast(&ls), + sizeof(ls) }); + ctrls.set(V4L2_CID_USER_BCM2835_ISP_LENS_SHADING, c); +} + +void IPARPi::applyAF(const struct AfStatus *afStatus, ControlList &lensCtrls) +{ + if (afStatus->lensSetting) { + ControlValue v(afStatus->lensSetting.value()); + lensCtrls.set(V4L2_CID_FOCUS_ABSOLUTE, v); + } +} + +/* + * Resamples a 16x12 table with central sampling to destW x destH with corner + * sampling. + */ +void IPARPi::resampleTable(uint16_t dest[], const std::vector &src, + int destW, int destH) +{ + /* + * Precalculate and cache the x sampling locations and phases to + * save recomputing them on every row. + */ + assert(destW > 1 && destH > 1 && destW <= 64); + int xLo[64], xHi[64]; + double xf[64]; + double x = -0.5, xInc = 16.0 / (destW - 1); + for (int i = 0; i < destW; i++, x += xInc) { + xLo[i] = floor(x); + xf[i] = x - xLo[i]; + xHi[i] = xLo[i] < 15 ? xLo[i] + 1 : 15; + xLo[i] = xLo[i] > 0 ? xLo[i] : 0; + } + + /* Now march over the output table generating the new values. */ + double y = -0.5, yInc = 12.0 / (destH - 1); + for (int j = 0; j < destH; j++, y += yInc) { + int yLo = floor(y); + double yf = y - yLo; + int yHi = yLo < 11 ? yLo + 1 : 11; + yLo = yLo > 0 ? yLo : 0; + double const *rowAbove = src.data() + yLo * 16; + double const *rowBelow = src.data() + yHi * 16; + for (int i = 0; i < destW; i++) { + double above = rowAbove[xLo[i]] * (1 - xf[i]) + rowAbove[xHi[i]] * xf[i]; + double below = rowBelow[xLo[i]] * (1 - xf[i]) + rowBelow[xHi[i]] * xf[i]; + int result = floor(1024 * (above * (1 - yf) + below * yf) + .5); + *(dest++) = result > 16383 ? 16383 : result; /* want u4.10 */ + } + } +} + +} /* namespace ipa::RPi */ + +/* + * External IPA module interface + */ +extern "C" { +const struct IPAModuleInfo ipaModuleInfo = { + IPA_MODULE_API_VERSION, + 1, + "PipelineHandlerRPi", + "rpi/vc4", +}; + +IPAInterface *ipaCreate() +{ + return new ipa::RPi::IPARPi(); +} + +} /* extern "C" */ + +} /* namespace libcamera */ -- cgit v1.2.1