From 952ef94ed78d71625219cbc3705efe2ae6301d39 Mon Sep 17 00:00:00 2001 From: Nick Hollinghurst Date: Mon, 23 Jan 2023 15:49:34 +0000 Subject: ipa: raspberrypi: Add support for the Sony IMX708 sensor Add support for Raspberry Pi Camera 3 modules (Sony IMX708 camera sensor) to the Raspberry Pi IPA. These modules are available in either normal or wide angle lens, both with IR or no IR cut options, giving a total for 4 variants. Provide IQ tuning files for all four variants. The IMX708 camera helper additionally parses PDAF and HDR histogram data that is provided in the embedded data stream from Unicam. Signed-off-by: Nick Hollinghurst Signed-off-by: Naushir Patuck Reviewed-by: Naushir Patuck Reviewed-by: David Plowman Signed-off-by: Kieran Bingham --- src/ipa/raspberrypi/cam_helper_imx708.cpp | 350 ++++++++++++++++ src/ipa/raspberrypi/data/imx708.json | 559 +++++++++++++++++++++++++ src/ipa/raspberrypi/data/imx708_noir.json | 559 +++++++++++++++++++++++++ src/ipa/raspberrypi/data/imx708_wide.json | 462 ++++++++++++++++++++ src/ipa/raspberrypi/data/imx708_wide_noir.json | 462 ++++++++++++++++++++ src/ipa/raspberrypi/data/meson.build | 4 + src/ipa/raspberrypi/meson.build | 1 + 7 files changed, 2397 insertions(+) create mode 100644 src/ipa/raspberrypi/cam_helper_imx708.cpp create mode 100644 src/ipa/raspberrypi/data/imx708.json create mode 100644 src/ipa/raspberrypi/data/imx708_noir.json create mode 100644 src/ipa/raspberrypi/data/imx708_wide.json create mode 100644 src/ipa/raspberrypi/data/imx708_wide_noir.json diff --git a/src/ipa/raspberrypi/cam_helper_imx708.cpp b/src/ipa/raspberrypi/cam_helper_imx708.cpp new file mode 100644 index 00000000..4c43c8e7 --- /dev/null +++ b/src/ipa/raspberrypi/cam_helper_imx708.cpp @@ -0,0 +1,350 @@ +/* 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; + + void populateMetadata(const MdParser::RegisterMap ®isters, + Metadata &metadata) const override; + + static bool parsePdafData(const uint8_t *ptr, size_t len, unsigned bpp, + PdafData &pdaf); + + bool parseAEHist(const uint8_t *ptr, size_t len, unsigned bpp); + void putAGCStatistics(StatisticsPtr stats); + + uint32_t aeHistLinear_[128]; + uint32_t aeHistAverage_; + bool aeHistValid_; +}; + +CamHelperImx708::CamHelperImx708() + : CamHelper(std::make_unique(registerList), frameIntegrationDiff), + aeHistLinear_{ 0 }, 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) { + PdafData pdaf; + if (parsePdafData(&buffer[2 * bytesPerLine], + buffer.size() - 2 * bytesPerLine, + mode_.bitdepth, pdaf)) + metadata.set("pdaf.data", 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, PdafData &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; + } + + ptr += 2 * step; + for (unsigned i = 0; i < PDAF_DATA_ROWS; ++i) { + for (unsigned j = 0; j < PDAF_DATA_COLS; ++j) { + unsigned c = (ptr[0] << 3) | (ptr[1] >> 5); + int p = (((ptr[1] & 0x0F) - (ptr[1] & 0x10)) << 6) | (ptr[2] >> 2); + pdaf.conf[i][j] = c; + pdaf.phase[i][j] = c ? p : 0; + ptr += step; + } + } + + return true; +} + +bool CamHelperImx708::parseAEHist(const uint8_t *ptr, size_t len, unsigned bpp) +{ + static const uint32_t ISP_PIPELINE_BITS = 13; + uint64_t count = 0, sum = 0; + size_t step = bpp >> 1; /* bytes per histogram bin */ + + 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); + aeHistLinear_[i] = c >> 2; /* pixels to quads */ + if (i != 0) { + count += c; + sum += c * + (i * (1u << (ISP_PIPELINE_BITS - 7)) + + (1u << (ISP_PIPELINE_BITS - 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 << ISP_PIPELINE_BITS) >> (17 - i)); + ptr += step; + } + if ((unsigned)((ptr[0] << 12) + (ptr[1] << 4) + (ptr[2] >> 4)) != + aeHistLinear_[1]) { + LOG(IPARPI, Error) << "Lin/Log histogram mismatch"; + return false; + } + + 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. + */ + memcpy(stats->hist[0].g_hist, aeHistLinear_, sizeof(stats->hist[0].g_hist)); + + constexpr unsigned int HdrHeadroomFactor = 4; + uint64_t v = HdrHeadroomFactor * aeHistAverage_; + for (int i = 0; i < AGC_REGIONS; i++) { + struct bcm2835_isp_stats_region &r = stats->agc_stats[i]; + r.r_sum = r.b_sum = r.g_sum = r.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/raspberrypi/data/imx708.json b/src/ipa/raspberrypi/data/imx708.json new file mode 100644 index 00000000..c38b2d4c --- /dev/null +++ b/src/ipa/raspberrypi/data/imx708.json @@ -0,0 +1,559 @@ +{ + "version": 2.0, + "target": "bcm2835", + "algorithms": [ + { + "rpi.black_level": + { + "black_level": 4096 + } + }, + { + "rpi.dpc": { } + }, + { + "rpi.lux": + { + "reference_shutter_speed": 10672, + "reference_gain": 1.12, + "reference_aperture": 1.0, + "reference_lux": 977, + "reference_Y": 8627 + } + }, + { + "rpi.noise": + { + "reference_constant": 16.0, + "reference_slope": 4.0 + } + }, + { + "rpi.geq": + { + "offset": 215, + "slope": 0.00287 + } 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"rpi.af": + { + "ranges": + { + "normal": + { + "min": 0.0, + "max": 12.0, + "default": 1.0 + }, + "macro": + { + "min": 4.0, + "max": 32.0, + "default": 6.0 + } + }, + "speeds": + { + "normal": + { + "step_coarse": 2.0, + "step_fine": 0.5, + "contrast_ratio": 0.75, + "pdaf_gain": -0.03, + "pdaf_squelch": 0.2, + "max_slew": 4.0, + "pdaf_frames": 20, + "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/raspberrypi/data/meson.build b/src/ipa/raspberrypi/data/meson.build index 5565508c..b163a052 100644 --- a/src/ipa/raspberrypi/data/meson.build +++ b/src/ipa/raspberrypi/data/meson.build @@ -11,6 +11,10 @@ conf_files = files([ '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', diff --git a/src/ipa/raspberrypi/meson.build b/src/ipa/raspberrypi/meson.build index 4e268953..9230e17b 100644 --- a/src/ipa/raspberrypi/meson.build +++ b/src/ipa/raspberrypi/meson.build @@ -23,6 +23,7 @@ rpi_ipa_sources = files([ 'cam_helper_imx296.cpp', 'cam_helper_imx477.cpp', 'cam_helper_imx519.cpp', + 'cam_helper_imx708.cpp', 'cam_helper_ov9281.cpp', 'controller/controller.cpp', 'controller/histogram.cpp', -- cgit v1.2.1