From patchwork Wed Oct 20 15:46:00 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: 14213 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 7120BC324E for ; Wed, 20 Oct 2021 15:46:23 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 18A5B68F7D; Wed, 20 Oct 2021 17:46:22 +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="sf6iwMou"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 618F668F5E for ; Wed, 20 Oct 2021 17:46:14 +0200 (CEST) Received: from tatooine.ideasonboard.com (unknown [IPv6:2a01:e0a:169:7140:ce4b:1c5f:7302:b899]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 1D1C04A0; Wed, 20 Oct 2021 17:46:14 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1634744774; bh=kMx+moPIPwfRFCviOp2uzuJPIwzKQjAIh25QfCJjcGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sf6iwMouaJgcO/Kx7i5f0zWqtcL+HLAWfR/DlRXXO/ujthwmPwqBdWB1g+b26eqYM EeZ3DTkpudpkwO48L9b2JGp9hopK7rEOfVGIllIVuDinB2PYgS6xgBgji4Q9PeIxcV vR4+OEx0gdmFeHKO+w0NCTQMGsFtcWJlGMOhPY5I= From: Jean-Michel Hautbois To: libcamera-devel@lists.libcamera.org Date: Wed, 20 Oct 2021 17:46:00 +0200 Message-Id: <20211020154607.180161-7-jeanmichel.hautbois@ideasonboard.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211020154607.180161-1-jeanmichel.hautbois@ideasonboard.com> References: <20211020154607.180161-1-jeanmichel.hautbois@ideasonboard.com> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v2 06/13] ipa: ipu3: agc: Change exposure limits 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" The exposure limits are set for one sensor until now, in a number of lines. We should not use those, but exposure limits in a time unit. Introduce default limits which with a default minimum of 20ms. This value should be given by the IPAIPU3. Use cached values expressed as a number of lines in the configure() call. Adapt the process() call accordingly. Signed-off-by: Jean-Michel Hautbois Reviewed-by: Kieran Bingham Reviewed-by: Laurent Pinchart --- src/ipa/ipu3/algorithms/agc.cpp | 34 ++++++++++++++++++--------------- src/ipa/ipu3/algorithms/agc.h | 3 ++- 2 files changed, 21 insertions(+), 16 deletions(-) diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp index b1757b91..8e1b6d8c 100644 --- a/src/ipa/ipu3/algorithms/agc.cpp +++ b/src/ipa/ipu3/algorithms/agc.cpp @@ -39,18 +39,14 @@ static constexpr uint32_t kMaxISO = 1500; static constexpr uint32_t kMinGain = kMinISO / 100; static constexpr uint32_t kMaxGain = kMaxISO / 100; -/* \todo use calculated value based on sensor */ -static constexpr uint32_t kMinExposure = 1; -static constexpr uint32_t kMaxExposure = 1976; - /* Histogram constants */ static constexpr uint32_t knumHistogramBins = 256; static constexpr double kEvGainTarget = 0.5; Agc::Agc() : frameCount_(0), lastFrame_(0), iqMean_(0.0), lineDuration_(0s), - maxExposureTime_(0s), filteredExposure_(0s), filteredExposureNoDg_(0s), - currentExposure_(0s), currentExposureNoDg_(0s) + minExposureLines_(0), maxExposureLines_(0), filteredExposure_(0s), + filteredExposureNoDg_(0s), currentExposure_(0s), currentExposureNoDg_(0s) { } @@ -60,13 +56,14 @@ int Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo) lineDuration_ = configInfo.sensorInfo.lineLength * 1.0s / configInfo.sensorInfo.pixelRate; - maxExposureTime_ = context.configuration.agc.maxShutterSpeed; /* Configure the default exposure and gain */ context.frameContext.agc.gain = context.configuration.agc.minAnalogueGain; - context.frameContext.agc.exposure = - context.configuration.agc.minShutterSpeed / lineDuration_; + context.frameContext.agc.exposure = minExposureLines_; + + minExposureLines_ = context.configuration.agc.minShutterSpeed / lineDuration_; + maxExposureLines_ = context.configuration.agc.maxShutterSpeed / lineDuration_; return 0; } @@ -151,23 +148,30 @@ void Agc::lockExposureGain(uint32_t &exposure, double &gain) LOG(IPU3Agc, Debug) << "Actual total exposure " << currentExposureNoDg_ << " Shutter speed " << currentShutter << " Gain " << gain; + currentExposure_ = currentExposureNoDg_ * newGain; - utils::Duration maxTotalExposure = maxExposureTime_ * kMaxGain; + utils::Duration maxShutterSpeed = maxExposureLines_ * lineDuration_; + utils::Duration maxTotalExposure = maxShutterSpeed * kMaxGain; currentExposure_ = std::min(currentExposure_, maxTotalExposure); - LOG(IPU3Agc, Debug) << "Target total exposure " << currentExposure_; + LOG(IPU3Agc, Debug) << "Target total exposure " << currentExposure_ + << ", maximum is " << maxTotalExposure; /* \todo: estimate if we need to desaturate */ filterExposure(); utils::Duration newExposure = 0.0s; - if (currentShutter < maxExposureTime_) { - exposure = std::clamp(static_cast(exposure * currentExposure_ / currentExposureNoDg_), kMinExposure, kMaxExposure); + if (currentShutter < maxShutterSpeed) { + exposure = std::clamp(exposure * currentExposure_ / currentExposureNoDg_, + minExposureLines_, + maxExposureLines_); newExposure = currentExposure_ / exposure; gain = std::clamp(static_cast(gain * currentExposure_ / newExposure), kMinGain, kMaxGain); - } else if (currentShutter >= maxExposureTime_) { + } else if (currentShutter >= maxShutterSpeed) { gain = std::clamp(static_cast(gain * currentExposure_ / currentExposureNoDg_), kMinGain, kMaxGain); newExposure = currentExposure_ / gain; - exposure = std::clamp(static_cast(exposure * currentExposure_ / newExposure), kMinExposure, kMaxExposure); + exposure = std::clamp(exposure * currentExposure_ / newExposure, + minExposureLines_, + maxExposureLines_); } LOG(IPU3Agc, Debug) << "Adjust exposure " << exposure * lineDuration_ << " and gain " << gain; } diff --git a/src/ipa/ipu3/algorithms/agc.h b/src/ipa/ipu3/algorithms/agc.h index 16b9fa0a..cd26d08c 100644 --- a/src/ipa/ipu3/algorithms/agc.h +++ b/src/ipa/ipu3/algorithms/agc.h @@ -42,7 +42,8 @@ private: double iqMean_; utils::Duration lineDuration_; - utils::Duration maxExposureTime_; + uint32_t minExposureLines_; + uint32_t maxExposureLines_; utils::Duration filteredExposure_; utils::Duration filteredExposureNoDg_;