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{ "id": 19164, "url": "https://patchwork.libcamera.org/api/patches/19164/?format=api", "web_url": "https://patchwork.libcamera.org/patch/19164/", "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": "<20231020084002.30665-4-naush@raspberrypi.com>", "date": "2023-10-20T08:39:59", "name": "[libcamera-devel,v1,3/6] ipa: rpi: agc: Allow AGC channels to avoid using \"fast desaturation\"", "commit_ref": "edb48a1337114e0b92caa54598397ce69c63a528", "pull_url": null, "state": "accepted", "archived": false, "hash": "4af447b955d806124064f0a46a4abd677645509a", "submitter": { "id": 34, "url": "https://patchwork.libcamera.org/api/people/34/?format=api", "name": "Naushir Patuck", "email": "naush@raspberrypi.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/19164/mbox/", "series": [ { "id": 4054, "url": "https://patchwork.libcamera.org/api/series/4054/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=4054", "date": "2023-10-20T08:39:56", "name": "Raspberry Pi: Preliminary PiSP support (round 2)", "version": 1, "mbox": "https://patchwork.libcamera.org/series/4054/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/19164/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/19164/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 AC460C32B6\n\tfor <parsemail@patchwork.libcamera.org>;\n\tFri, 20 Oct 2023 08:40:34 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id BCA9762987;\n\tFri, 20 Oct 2023 10:40:32 +0200 (CEST)", "from mail-wr1-x432.google.com (mail-wr1-x432.google.com\n\t[IPv6:2a00:1450:4864:20::432])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id ECF7D62984\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tFri, 20 Oct 2023 10:40:29 +0200 (CEST)", "by mail-wr1-x432.google.com with SMTP id\n\tffacd0b85a97d-32dbbf3c782so992820f8f.1\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tFri, 20 Oct 2023 01:40:29 -0700 (PDT)", "from localhost.localdomain ([93.93.133.154])\n\tby smtp.gmail.com with ESMTPSA id\n\tr3-20020adff103000000b0032d9337e7d1sm1213356wro.11.2023.10.20.01.40.28\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tFri, 20 Oct 2023 01:40:28 -0700 (PDT)" ], "DKIM-Signature": [ "v=1; 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dkim=pass (2048-bit key; \n\tunprotected) header.d=raspberrypi.com\n\theader.i=@raspberrypi.com\n\theader.b=\"Gu+RZyUP\"; dkim-atps=neutral", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20230601; t=1697791229; x=1698396029;\n\th=content-transfer-encoding:mime-version:references:in-reply-to\n\t:message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc\n\t:subject:date:message-id:reply-to;\n\tbh=Q4kaeNRdLIkQc2M7j/gKLsUZmKM45BzBHk+4nObYgw8=;\n\tb=iykpwBGSCT1qVffIBaSKwlM3qrE3T10qTil+hiwPJxUEBfR2Io9vAe53vOFZdg3rqR\n\tifPu3SfP+EPWLXW6lJADO37JRdAbafMVPFj2tEskq+bD1rGGXin+eCtAhPLceoEWGOFr\n\t+V/A7SSCyPGve3DOQNg9pG0DOqAF7ahxgxPUzCRsARpREtlKHj7DPYX/VV1cg7yQEcDq\n\tm1R0lyI7rMTWCfTrxusd/26La7Z8jdgYV0CM0JrD6VdVYZg5hpTC3bQ9SkekH59dUXrS\n\tuAtMt8sbbAB/b9p8YDPpccI+nqrX91i5FdgL6+slGz8TaOno3q7xQ0UF+sAWyYO8fgkb\n\td8oA==", "X-Gm-Message-State": "AOJu0YxmnKBsJheH2qvXn2P5Oh9JRdsFXZGDSuHk9NN03kGpE5jtvoM2\n\tYeWQkskbGRKFx1ohwcVBWb0QcWUmPTxKWfJkkKTtkw==", "X-Google-Smtp-Source": "AGHT+IEd0EofWbyecqtYAN7ea7OjImBfMEXKE/z25K8Toj8u+pgb7DTHIrQDup9AcWrX1kQGi4ClbA==", "X-Received": "by 2002:adf:ec49:0:b0:32d:c705:3e5 with SMTP id\n\tw9-20020adfec49000000b0032dc70503e5mr3909683wrn.15.1697791229046; \n\tFri, 20 Oct 2023 01:40:29 -0700 (PDT)", "To": "libcamera-devel@lists.libcamera.org", "Date": "Fri, 20 Oct 2023 09:39:59 +0100", "Message-Id": "<20231020084002.30665-4-naush@raspberrypi.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20231020084002.30665-1-naush@raspberrypi.com>", "References": "<20231020084002.30665-1-naush@raspberrypi.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v1 3/6] ipa: rpi: agc: Allow AGC channels\n\tto avoid using \"fast desaturation\"", "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": "Naushir Patuck via libcamera-devel\n\t<libcamera-devel@lists.libcamera.org>", "Reply-To": "Naushir Patuck <naush@raspberrypi.com>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "From: David Plowman <david.plowman@raspberrypi.com>\n\n\"Fast desaturation\" is a technique that can help the AGC algorithm to\ndesaturate images more quickly when they are very\nover-exposed. However, it uses digital gain to do this which can\nconfuse our HDR techniques. Therefore make it optional.\n\nSigned-off-by: David Plowman <david.plowman@raspberrypi.com>\nReviewed-by: Naushir Patuck <naush@raspberrypi.com>\n---\n src/ipa/rpi/controller/rpi/agc_channel.cpp | 8 ++++++--\n src/ipa/rpi/controller/rpi/agc_channel.h | 1 +\n 2 files changed, 7 insertions(+), 2 deletions(-)", "diff": "diff --git a/src/ipa/rpi/controller/rpi/agc_channel.cpp b/src/ipa/rpi/controller/rpi/agc_channel.cpp\nindex 1e7eae06d425..3efb6482b67f 100644\n--- a/src/ipa/rpi/controller/rpi/agc_channel.cpp\n+++ b/src/ipa/rpi/controller/rpi/agc_channel.cpp\n@@ -253,6 +253,8 @@ int AgcConfig::read(const libcamera::YamlObject ¶ms)\n \n \tstableRegion = params[\"stable_region\"].get<double>(0.02);\n \n+\tdesaturate = params[\"desaturate\"].get<int>(1);\n+\n \treturn 0;\n }\n \n@@ -860,8 +862,10 @@ bool AgcChannel::applyDigitalGain(double gain, double targetY, bool channelBound\n \t * quickly (and we then approach the correct value more quickly from\n \t * below).\n \t */\n-\tbool desaturate = !channelBound &&\n-\t\t\t targetY > config_.fastReduceThreshold && gain < sqrt(targetY);\n+\tbool desaturate = false;\n+\tif (config_.desaturate)\n+\t\tdesaturate = !channelBound &&\n+\t\t\t targetY > config_.fastReduceThreshold && gain < sqrt(targetY);\n \tif (desaturate)\n \t\tdg /= config_.fastReduceThreshold;\n \tLOG(RPiAgc, Debug) << \"Digital gain \" << dg << \" desaturate? \" << desaturate;\ndiff --git a/src/ipa/rpi/controller/rpi/agc_channel.h b/src/ipa/rpi/controller/rpi/agc_channel.h\nindex c1808422498a..4cf7233eef25 100644\n--- a/src/ipa/rpi/controller/rpi/agc_channel.h\n+++ b/src/ipa/rpi/controller/rpi/agc_channel.h\n@@ -76,6 +76,7 @@ struct AgcConfig {\n \tlibcamera::utils::Duration defaultExposureTime;\n \tdouble defaultAnalogueGain;\n \tdouble stableRegion;\n+\tbool desaturate;\n };\n \n class AgcChannel\n", "prefixes": [ "libcamera-devel", "v1", "3/6" ] }