From patchwork Wed Aug 18 15:53:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Michel Hautbois X-Patchwork-Id: 13392 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id A165BC3242 for ; Wed, 18 Aug 2021 15:54:16 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 405A868915; Wed, 18 Aug 2021 17:54:16 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="k3k5mKsd"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 1912F688AC for ; Wed, 18 Aug 2021 17:54:10 +0200 (CEST) Received: from tatooine.ideasonboard.com (unknown [IPv6:2a01:e0a:169:7140:946e:2bbb:370e:41e4]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id B63AAF1; Wed, 18 Aug 2021 17:54:09 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1629302049; bh=JkmKYXviQbxf7ujkqVVVqQwg8IKjW+jcFGowcVDxeG0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k3k5mKsd8960oZVNTnW7rC9deI76hEO1FJo5bwhLaFeCMhCZvy5tm4mNUQwpUYFmX hijHgvzXb0DgFdgk34BPj4THSAiUjNQxkJ4bdsfH2X5DHkQdswVB0aJlQ+/5sAlm9t vQFeFCuimdyIexOV6XY6OajpQAI34oAGNdWrjswc= From: Jean-Michel Hautbois To: libcamera-devel@lists.libcamera.org Date: Wed, 18 Aug 2021 17:53:59 +0200 Message-Id: <20210818155403.268694-6-jeanmichel.hautbois@ideasonboard.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210818155403.268694-1-jeanmichel.hautbois@ideasonboard.com> References: <20210818155403.268694-1-jeanmichel.hautbois@ideasonboard.com> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v3 5/9] ipa: ipu3: Introduce a modular contrast algorithm X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" Introduce a new algorithm to manage the contrast handling of the IPU3. The initial algorithm is chosen to configure the gamma contrast curve which moves the implementation out of AWB for simplicity. As it is initialised with a default gamma value of 1.1, there is no need to use the default table at initialisation anymore. This demonstrates the way to use process() call when the EventStatReady comes in. The function calculates the LUT in the context of a frame, and when prepare() is called, the parameters are filled with the updated values. AGC is modified to take the new process interface into account. Signed-off-by: Kieran Bingham Signed-off-by: Jean-Michel Hautbois Reviewed-by: Kieran Bingham --- src/ipa/ipu3/algorithms/contrast.cpp | 53 ++++++++++++++++++++++++++++ src/ipa/ipu3/algorithms/contrast.h | 32 +++++++++++++++++ src/ipa/ipu3/algorithms/meson.build | 1 + src/ipa/ipu3/ipa_context.h | 8 +++++ src/ipa/ipu3/ipu3.cpp | 15 +++++--- src/ipa/ipu3/ipu3_agc.cpp | 9 +++-- src/ipa/ipu3/ipu3_agc.h | 5 +-- src/ipa/ipu3/ipu3_awb.cpp | 41 ++------------------- src/ipa/ipu3/ipu3_awb.h | 2 +- 9 files changed, 113 insertions(+), 53 deletions(-) create mode 100644 src/ipa/ipu3/algorithms/contrast.cpp create mode 100644 src/ipa/ipu3/algorithms/contrast.h diff --git a/src/ipa/ipu3/algorithms/contrast.cpp b/src/ipa/ipu3/algorithms/contrast.cpp new file mode 100644 index 00000000..eb92d3c7 --- /dev/null +++ b/src/ipa/ipu3/algorithms/contrast.cpp @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2021, Google inc. + * + * contrast.cpp - IPU3 Contrast and Gamma control + */ + +#include "contrast.h" + +#include + +namespace libcamera { + +namespace ipa::ipu3::algorithms { + + +Contrast::Contrast() + : gamma_(1.0) +{ +} + +void Contrast::prepare([[maybe_unused]] IPAContext &context, ipu3_uapi_params ¶ms) +{ + /* Copy the calculated LUT into the parameters buffer */ + memcpy(params.acc_param.gamma.gc_lut.lut, + context.frameContext.contrast.gammaCorrection.lut, + IPU3_UAPI_GAMMA_CORR_LUT_ENTRIES * sizeof(params.acc_param.gamma.gc_lut.lut[0])); + + /* Enable the custom gamma table */ + params.use.acc_gamma = 1; + params.acc_param.gamma.gc_ctrl.enable = 1; +} + +void Contrast::process([[maybe_unused]] IPAContext &context, [[maybe_unused]] const ipu3_uapi_stats_3a *stats) +{ + /* Limit the gamma effect for now */ + /* \todo expose gamma control setting through the libcamera control API */ + gamma_ = 1.1; + + /* Plot the gamma curve into the look up table */ + for (uint32_t i = 0; i < IPU3_UAPI_GAMMA_CORR_LUT_ENTRIES; i++) { + double j = static_cast(i) + / (IPU3_UAPI_GAMMA_CORR_LUT_ENTRIES - 1); + double gamma = std::pow(j, 1.0 / gamma_); + + /* The maximum value 255 is represented on 13 bits in the IPU3 */ + context.frameContext.contrast.gammaCorrection.lut[i] = gamma * 8191; + } +} + +} /* namespace ipa::ipu3::algorithms */ + +} /* namespace libcamera */ diff --git a/src/ipa/ipu3/algorithms/contrast.h b/src/ipa/ipu3/algorithms/contrast.h new file mode 100644 index 00000000..6cd6c5db --- /dev/null +++ b/src/ipa/ipu3/algorithms/contrast.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2021, Google inc. + * + * contrast.h - IPU3 Contrast and Gamma control + */ +#ifndef __LIBCAMERA_IPU3_ALGORITHMS_CONTRAST_H__ +#define __LIBCAMERA_IPU3_ALGORITHMS_CONTRAST_H__ + +#include "algorithm.h" + +namespace libcamera { + +namespace ipa::ipu3::algorithms { + +class Contrast : public Algorithm +{ +public: + Contrast(); + ~Contrast() = default; + + void prepare(IPAContext &context, ipu3_uapi_params ¶ms) override; + void process(IPAContext &context, const ipu3_uapi_stats_3a *stats) override; +private: + double gamma_; +}; + +} /* namespace ipa::ipu3::algorithms */ + +} /* namespace libcamera */ + +#endif /* __LIBCAMERA_IPU3_ALGORITHMS_CONTRAST_H__ */ diff --git a/src/ipa/ipu3/algorithms/meson.build b/src/ipa/ipu3/algorithms/meson.build index dc538b79..e3ff3b78 100644 --- a/src/ipa/ipu3/algorithms/meson.build +++ b/src/ipa/ipu3/algorithms/meson.build @@ -2,4 +2,5 @@ ipu3_ipa_algorithms = files([ 'algorithm.cpp', + 'contrast.cpp', ]) diff --git a/src/ipa/ipu3/ipa_context.h b/src/ipa/ipu3/ipa_context.h index 46291d9e..5964ba6d 100644 --- a/src/ipa/ipu3/ipa_context.h +++ b/src/ipa/ipu3/ipa_context.h @@ -24,6 +24,14 @@ struct IPAConfiguration { }; struct IPAFrameContext { + struct Agc { + uint32_t exposure; + double gain; + } agc; + + struct Contrast { + struct ipu3_uapi_gamma_corr_lut gammaCorrection; + } contrast; }; struct IPAContext { diff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp index dc6f0735..ee0dd9fe 100644 --- a/src/ipa/ipu3/ipu3.cpp +++ b/src/ipa/ipu3/ipu3.cpp @@ -30,6 +30,7 @@ #include "libcamera/internal/mapped_framebuffer.h" #include "algorithms/algorithm.h" +#include "algorithms/contrast.h" #include "ipu3_agc.h" #include "ipu3_awb.h" #include "libipa/camera_sensor_helper.h" @@ -218,6 +219,9 @@ int IPAIPU3::init(const IPASettings &settings, *ipaControls = ControlInfoMap(std::move(controls), controls::controls); + /* Construct our Algorithms */ + algorithms_.emplace_back(new algorithms::Contrast()); + return 0; } @@ -416,7 +420,7 @@ void IPAIPU3::fillParams(unsigned int frame, ipu3_uapi_params *params) algo->prepare(context_, params_); if (agcAlgo_->updateControls()) - awbAlgo_->updateWbParameters(params_, agcAlgo_->gamma()); + awbAlgo_->updateWbParameters(params_); *params = params_; @@ -431,13 +435,16 @@ void IPAIPU3::parseStatistics(unsigned int frame, [[maybe_unused]] const ipu3_uapi_stats_3a *stats) { ControlList ctrls(controls::controls); + /* \todo These fields should not be written by the IPAIPU3 layer */ + context_.frameContext.agc.gain = camHelper_->gain(gain_); + context_.frameContext.agc.exposure = exposure_; for (auto const &algo : algorithms_) algo->process(context_, stats); - double gain = camHelper_->gain(gain_); - agcAlgo_->process(stats, exposure_, gain); - gain_ = camHelper_->gainCode(gain); + agcAlgo_->process(context_, stats); + exposure_ = context_.frameContext.agc.exposure; + gain_ = camHelper_->gainCode(context_.frameContext.agc.gain); awbAlgo_->calculateWBGains(stats); diff --git a/src/ipa/ipu3/ipu3_agc.cpp b/src/ipa/ipu3/ipu3_agc.cpp index 408eb849..c6782ff4 100644 --- a/src/ipa/ipu3/ipu3_agc.cpp +++ b/src/ipa/ipu3/ipu3_agc.cpp @@ -52,7 +52,7 @@ static constexpr uint8_t kCellSize = 8; IPU3Agc::IPU3Agc() : frameCount_(0), lastFrame_(0), converged_(false), - updateControls_(false), iqMean_(0.0), gamma_(1.0), + updateControls_(false), iqMean_(0.0), lineDuration_(0s), maxExposureTime_(0s), prevExposure_(0s), prevExposureNoDg_(0s), currentExposure_(0s), currentExposureNoDg_(0s) @@ -104,9 +104,6 @@ void IPU3Agc::processBrightness(const ipu3_uapi_stats_3a *stats) } } - /* Limit the gamma effect for now */ - gamma_ = 1.1; - /* Estimate the quantile mean of the top 2% of the histogram */ iqMean_ = Histogram(Span(hist)).interQuantileMean(0.98, 1.0); } @@ -193,8 +190,10 @@ void IPU3Agc::lockExposureGain(uint32_t &exposure, double &gain) lastFrame_ = frameCount_; } -void IPU3Agc::process(const ipu3_uapi_stats_3a *stats, uint32_t &exposure, double &gain) +void IPU3Agc::process(IPAContext &context, const ipu3_uapi_stats_3a *stats) { + uint32_t &exposure = context.frameContext.agc.exposure; + double &gain = context.frameContext.agc.gain; processBrightness(stats); lockExposureGain(exposure, gain); frameCount_++; diff --git a/src/ipa/ipu3/ipu3_agc.h b/src/ipa/ipu3/ipu3_agc.h index f00b98d6..f8290abd 100644 --- a/src/ipa/ipu3/ipu3_agc.h +++ b/src/ipa/ipu3/ipu3_agc.h @@ -30,11 +30,9 @@ public: ~IPU3Agc() = default; void initialise(struct ipu3_uapi_grid_config &bdsGrid, const IPACameraSensorInfo &sensorInfo); - void process(const ipu3_uapi_stats_3a *stats, uint32_t &exposure, double &gain); + void process(IPAContext &context, const ipu3_uapi_stats_3a *stats); bool converged() { return converged_; } bool updateControls() { return updateControls_; } - /* \todo Use a metadata exchange between IPAs */ - double gamma() { return gamma_; } private: void processBrightness(const ipu3_uapi_stats_3a *stats); @@ -50,7 +48,6 @@ private: bool updateControls_; double iqMean_; - double gamma_; Duration lineDuration_; Duration maxExposureTime_; diff --git a/src/ipa/ipu3/ipu3_awb.cpp b/src/ipa/ipu3/ipu3_awb.cpp index 4bb321b3..c2d9e0c1 100644 --- a/src/ipa/ipu3/ipu3_awb.cpp +++ b/src/ipa/ipu3/ipu3_awb.cpp @@ -133,31 +133,6 @@ static const struct ipu3_uapi_ccm_mat_config imguCssCcmDefault = { 0, 0, 8191, 0 }; -/* Default settings for Gamma correction */ -const struct ipu3_uapi_gamma_corr_lut imguCssGammaLut = { { - 63, 79, 95, 111, 127, 143, 159, 175, 191, 207, 223, 239, 255, 271, 287, - 303, 319, 335, 351, 367, 383, 399, 415, 431, 447, 463, 479, 495, 511, - 527, 543, 559, 575, 591, 607, 623, 639, 655, 671, 687, 703, 719, 735, - 751, 767, 783, 799, 815, 831, 847, 863, 879, 895, 911, 927, 943, 959, - 975, 991, 1007, 1023, 1039, 1055, 1071, 1087, 1103, 1119, 1135, 1151, - 1167, 1183, 1199, 1215, 1231, 1247, 1263, 1279, 1295, 1311, 1327, 1343, - 1359, 1375, 1391, 1407, 1423, 1439, 1455, 1471, 1487, 1503, 1519, 1535, - 1551, 1567, 1583, 1599, 1615, 1631, 1647, 1663, 1679, 1695, 1711, 1727, - 1743, 1759, 1775, 1791, 1807, 1823, 1839, 1855, 1871, 1887, 1903, 1919, - 1935, 1951, 1967, 1983, 1999, 2015, 2031, 2047, 2063, 2079, 2095, 2111, - 2143, 2175, 2207, 2239, 2271, 2303, 2335, 2367, 2399, 2431, 2463, 2495, - 2527, 2559, 2591, 2623, 2655, 2687, 2719, 2751, 2783, 2815, 2847, 2879, - 2911, 2943, 2975, 3007, 3039, 3071, 3103, 3135, 3167, 3199, 3231, 3263, - 3295, 3327, 3359, 3391, 3423, 3455, 3487, 3519, 3551, 3583, 3615, 3647, - 3679, 3711, 3743, 3775, 3807, 3839, 3871, 3903, 3935, 3967, 3999, 4031, - 4063, 4095, 4127, 4159, 4223, 4287, 4351, 4415, 4479, 4543, 4607, 4671, - 4735, 4799, 4863, 4927, 4991, 5055, 5119, 5183, 5247, 5311, 5375, 5439, - 5503, 5567, 5631, 5695, 5759, 5823, 5887, 5951, 6015, 6079, 6143, 6207, - 6271, 6335, 6399, 6463, 6527, 6591, 6655, 6719, 6783, 6847, 6911, 6975, - 7039, 7103, 7167, 7231, 7295, 7359, 7423, 7487, 7551, 7615, 7679, 7743, - 7807, 7871, 7935, 7999, 8063, 8127, 8191 -} }; - IPU3Awb::IPU3Awb() : Algorithm() { @@ -197,10 +172,6 @@ void IPU3Awb::initialise(ipu3_uapi_params ¶ms, const Size &bdsOutputSize, st params.use.acc_ccm = 1; params.acc_param.ccm = imguCssCcmDefault; - params.use.acc_gamma = 1; - params.acc_param.gamma.gc_lut = imguCssGammaLut; - params.acc_param.gamma.gc_ctrl.enable = 1; - zones_.reserve(kAwbStatsSizeX * kAwbStatsSizeY); } @@ -350,7 +321,7 @@ void IPU3Awb::calculateWBGains(const ipu3_uapi_stats_3a *stats) } } -void IPU3Awb::updateWbParameters(ipu3_uapi_params ¶ms, double agcGamma) +void IPU3Awb::updateWbParameters(ipu3_uapi_params ¶ms) { /* * Green gains should not be touched and considered 1. @@ -362,18 +333,10 @@ void IPU3Awb::updateWbParameters(ipu3_uapi_params ¶ms, double agcGamma) params.acc_param.bnr.wb_gains.b = 4096 * asyncResults_.blueGain; params.acc_param.bnr.wb_gains.gb = 16; - LOG(IPU3Awb, Debug) << "Color temperature estimated: " << asyncResults_.temperatureK - << " and gamma calculated: " << agcGamma; + LOG(IPU3Awb, Debug) << "Color temperature estimated: " << asyncResults_.temperatureK; /* The CCM matrix may change when color temperature will be used */ params.acc_param.ccm = imguCssCcmDefault; - - for (uint32_t i = 0; i < 256; i++) { - double j = i / 255.0; - double gamma = std::pow(j, 1.0 / agcGamma); - /* The maximum value 255 is represented on 13 bits in the IPU3 */ - params.acc_param.gamma.gc_lut.lut[i] = gamma * 8191; - } } } /* namespace ipa::ipu3 */ diff --git a/src/ipa/ipu3/ipu3_awb.h b/src/ipa/ipu3/ipu3_awb.h index ea2d4320..eeb2920b 100644 --- a/src/ipa/ipu3/ipu3_awb.h +++ b/src/ipa/ipu3/ipu3_awb.h @@ -31,7 +31,7 @@ public: void initialise(ipu3_uapi_params ¶ms, const Size &bdsOutputSize, struct ipu3_uapi_grid_config &bdsGrid); void calculateWBGains(const ipu3_uapi_stats_3a *stats); - void updateWbParameters(ipu3_uapi_params ¶ms, double agcGamma); + void updateWbParameters(ipu3_uapi_params ¶ms); struct Ipu3AwbCell { unsigned char greenRedAvg;