{"id":24076,"url":"https://patchwork.libcamera.org/api/1.1/patches/24076/?format=json","web_url":"https://patchwork.libcamera.org/patch/24076/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20250808141315.413839-6-stefan.klug@ideasonboard.com>","date":"2025-08-08T14:12:43","name":"[v2,05/16] libipa: exposure_mode_helper: Remove double calculation of lastStageGain","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"eac1537c25257d3e61b6c45e4e3853e2e356bad4","submitter":{"id":184,"url":"https://patchwork.libcamera.org/api/1.1/people/184/?format=json","name":"Stefan Klug","email":"stefan.klug@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/24076/mbox/","series":[{"id":5364,"url":"https://patchwork.libcamera.org/api/1.1/series/5364/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5364","date":"2025-08-08T14:12:38","name":"Implement WDR algorithm","version":2,"mbox":"https://patchwork.libcamera.org/series/5364/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/24076/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/24076/checks/","tags":{},"headers":{"Return-Path":"","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 E2D91BDCC1\n\tfor ;\n\tFri, 8 Aug 2025 14:13:58 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 9C67A6922A;\n\tFri, 8 Aug 2025 16:13:58 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id BAEBC6921C\n\tfor ;\n\tFri, 8 Aug 2025 16:13:57 +0200 (CEST)","from ideasonboard.com (unknown\n\t[IPv6:2a00:6020:448c:6c00:3ea1:35ac:90da:a221])\n\tby perceval.ideasonboard.com (Postfix) with UTF8SMTPSA id CCC7342D0; \n\tFri, 8 Aug 2025 16:13:07 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"g2aKZd+0\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1754662387;\n\tbh=jaSaTylteAf9BebnDZq8p7FGkbu3Unqpfr99GXpMpc8=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=g2aKZd+0oqrqcPH1Mwum3Z3uIZIi1neI2/zw28mRxe9WVXAbbvsXc2bdoF48CZ7nn\n\tTklueD9Qxt8oGK3080WtwbIpsVE25GoBeohs9Nayq7yw87wf0mmnsLzjpTyzjlK0zy\n\tZtfBUIlaUenY72NMDjgENQYC4/b5xX9E8GRXhFK4=","From":"Stefan Klug ","To":"libcamera-devel@lists.libcamera.org","Cc":"Stefan Klug ","Subject":"[PATCH v2 05/16] libipa: exposure_mode_helper: Remove double\n\tcalculation of lastStageGain","Date":"Fri, 8 Aug 2025 16:12:43 +0200","Message-ID":"<20250808141315.413839-6-stefan.klug@ideasonboard.com>","X-Mailer":"git-send-email 2.48.1","In-Reply-To":"<20250808141315.413839-1-stefan.klug@ideasonboard.com>","References":"<20250808141315.413839-1-stefan.klug@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"lastStageGain gets recalculated unconditionally even though it is the\nstageGain of the last stage. Refactor for increased simplicity and\nefficiency.\n\nSigned-off-by: Stefan Klug \n---\n src/ipa/libipa/exposure_mode_helper.cpp | 4 +++-\n 1 file changed, 3 insertions(+), 1 deletion(-)","diff":"diff --git a/src/ipa/libipa/exposure_mode_helper.cpp b/src/ipa/libipa/exposure_mode_helper.cpp\nindex d0a61908c966..3c758851679f 100644\n--- a/src/ipa/libipa/exposure_mode_helper.cpp\n+++ b/src/ipa/libipa/exposure_mode_helper.cpp\n@@ -198,10 +198,10 @@ ExposureModeHelper::splitExposure(utils::Duration exposure) const\n \n \tutils::Duration exposureTime;\n \tdouble stageGain = 1.0;\n+\tdouble lastStageGain = 1.0;\n \tdouble gain;\n \n \tfor (unsigned int stage = 0; stage < gains_.size(); stage++) {\n-\t\tdouble lastStageGain = stage == 0 ? 1.0 : clampGain(gains_[stage - 1]);\n \t\tutils::Duration stageExposureTime = clampExposureTime(exposureTimes_[stage]);\n \t\tstageGain = clampGain(gains_[stage]);\n \n@@ -228,6 +228,8 @@ ExposureModeHelper::splitExposure(utils::Duration exposure) const\n \n \t\t\treturn { exposureTime, gain, exposure / (exposureTime * gain) };\n \t\t}\n+\n+\t\tlastStageGain = stageGain;\n \t}\n \n \t/*\n","prefixes":["v2","05/16"]}