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{ "id": 18639, "url": "https://patchwork.libcamera.org/api/patches/18639/?format=api", "web_url": "https://patchwork.libcamera.org/patch/18639/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20230519145109.447590-1-bbara93@gmail.com>", "date": "2023-05-19T14:51:09", "name": "[libcamera-devel] ipa: rkisp1: agc: drop hard-coded analogue gain range", "commit_ref": "a3178dd0391f716d01fe216449e977d1e1bd5591", "pull_url": null, "state": "accepted", "archived": false, "hash": "36288b37587ed64eb9182578b98db9b25182d604", "submitter": { "id": 163, "url": "https://patchwork.libcamera.org/api/people/163/?format=api", "name": "Benjamin Bara", "email": "bbara93@gmail.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/18639/mbox/", "series": [ { "id": 3880, "url": "https://patchwork.libcamera.org/api/series/3880/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=3880", "date": "2023-05-19T14:51:09", "name": "[libcamera-devel] ipa: rkisp1: agc: drop hard-coded analogue gain range", "version": 1, "mbox": "https://patchwork.libcamera.org/series/3880/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/18639/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/18639/checks/", "tags": {}, "headers": { "Return-Path": "<libcamera-devel-bounces@lists.libcamera.org>", "X-Original-To": "parsemail@patchwork.libcamera.org", "Delivered-To": "parsemail@patchwork.libcamera.org", "Received": [ "from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 4FADBC31E9\n\tfor <parsemail@patchwork.libcamera.org>;\n\tFri, 19 May 2023 15:07:30 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 9D9416285F;\n\tFri, 19 May 2023 17:07:29 +0200 (CEST)", "from mail-ej1-x62f.google.com (mail-ej1-x62f.google.com\n\t[IPv6:2a00:1450:4864:20::62f])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id C13DD627CD\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tFri, 19 May 2023 16:51:18 +0200 (CEST)", "by mail-ej1-x62f.google.com with SMTP id\n\ta640c23a62f3a-96f50e26b8bso262596566b.2\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tFri, 19 May 2023 07:51:18 -0700 (PDT)", "from PCBABN.skidata.net ([91.230.2.244])\n\tby smtp.gmail.com with ESMTPSA id\n\tbq6-20020a170906d0c600b0093313f4fc3csm2375636ejb.70.2023.05.19.07.51.17\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tFri, 19 May 2023 07:51:17 -0700 (PDT)" ], "DKIM-Signature": [ "v=1; 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\n\tFri, 19 May 2023 07:51:17 -0700 (PDT)", "To": "libcamera-devel@lists.libcamera.org", "Date": "Fri, 19 May 2023 16:51:09 +0200", "Message-Id": "<20230519145109.447590-1-bbara93@gmail.com>", "X-Mailer": "git-send-email 2.34.1", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Approved-At": "Fri, 19 May 2023 17:07:28 +0200", "Subject": "[libcamera-devel] [PATCH] ipa: rkisp1: agc: drop hard-coded\n\tanalogue gain range", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "From": "Benjamin Bara via libcamera-devel <libcamera-devel@lists.libcamera.org>", "Reply-To": "Benjamin Bara <bbara93@gmail.com>", "Cc": "Benjamin Bara <benjamin.bara@skidata.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "From: Benjamin Bara <benjamin.bara@skidata.com>\n\nAs the sensor's analogue gain range is known (read-out in\nIPARkISP1::configure()), drop the limiting hard-coded range.\nThis enables better performance in low-light conditions for sensors with\na higher gain (e.g. the imx327).\n\nSigned-off-by: Benjamin Bara <benjamin.bara@skidata.com>\n---\n src/ipa/rkisp1/algorithms/agc.cpp | 19 +++----------------\n 1 file changed, 3 insertions(+), 16 deletions(-)", "diff": "diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp\nindex 22f70aba..a4e5500e 100644\n--- a/src/ipa/rkisp1/algorithms/agc.cpp\n+++ b/src/ipa/rkisp1/algorithms/agc.cpp\n@@ -36,15 +36,6 @@ namespace ipa::rkisp1::algorithms {\n \n LOG_DEFINE_CATEGORY(RkISP1Agc)\n \n-/*\n- * Limits for analogue gain values\n- *\n- * \\todo Remove the hard-coded limits and let the sensor helper specify\n- * the minimum and maximum allowed gain values.\n- */\n-static constexpr double kMinAnalogueGain = 1.0;\n-static constexpr double kMaxAnalogueGain = 16.0;\n-\n /* \\todo Honour the FrameDurationLimits control instead of hardcoding a limit */\n static constexpr utils::Duration kMaxShutterSpeed = 60ms;\n \n@@ -80,9 +71,7 @@ Agc::Agc()\n int Agc::configure(IPAContext &context, const IPACameraSensorInfo &configInfo)\n {\n \t/* Configure the default exposure and gain. */\n-\tcontext.activeState.agc.automatic.gain =\n-\t\tstd::max(context.configuration.sensor.minAnalogueGain,\n-\t\t\t kMinAnalogueGain);\n+\tcontext.activeState.agc.automatic.gain = context.configuration.sensor.minAnalogueGain;\n \tcontext.activeState.agc.automatic.exposure =\n \t\t10ms / context.configuration.sensor.lineDuration;\n \tcontext.activeState.agc.manual.gain = context.activeState.agc.automatic.gain;\n@@ -265,10 +254,8 @@ void Agc::computeExposure(IPAContext &context, IPAFrameContext &frameContext,\n \tutils::Duration maxShutterSpeed = std::min(configuration.sensor.maxShutterSpeed,\n \t\t\t\t\t\t kMaxShutterSpeed);\n \n-\tdouble minAnalogueGain = std::max(configuration.sensor.minAnalogueGain,\n-\t\t\t\t\t kMinAnalogueGain);\n-\tdouble maxAnalogueGain = std::min(configuration.sensor.maxAnalogueGain,\n-\t\t\t\t\t kMaxAnalogueGain);\n+\tdouble minAnalogueGain = configuration.sensor.minAnalogueGain;\n+\tdouble maxAnalogueGain = configuration.sensor.maxAnalogueGain;\n \n \t/* Consider within 1% of the target as correctly exposed. */\n \tif (utils::abs_diff(evGain, 1.0) < 0.01)\n", "prefixes": [ "libcamera-devel" ] }