{"id":25859,"url":"https://patchwork.libcamera.org/api/patches/25859/?format=json","web_url":"https://patchwork.libcamera.org/patch/25859/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/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":"<20260120-sklug-lsc-resampling-v2-dev-v4-4-2411c4be6d6d@ideasonboard.com>","date":"2026-01-20T08:45:46","name":"[v4,04/14] ipa: rkisp1: lsc: Rename res to positions","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"0ee819e8a55a8bb121448dbae8acfd6541c8d2ad","submitter":{"id":184,"url":"https://patchwork.libcamera.org/api/people/184/?format=json","name":"Stefan Klug","email":"stefan.klug@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/25859/mbox/","series":[{"id":5720,"url":"https://patchwork.libcamera.org/api/series/5720/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5720","date":"2026-01-20T08:45:42","name":"Add resampling support for polynomial LSC data","version":4,"mbox":"https://patchwork.libcamera.org/series/5720/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/25859/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/25859/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 4F036BDCBF\n\tfor ;\n\tTue, 20 Jan 2026 08:46:07 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id C19F961FC8;\n\tTue, 20 Jan 2026 09:46:06 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 290C561FBC\n\tfor ;\n\tTue, 20 Jan 2026 09:46:05 +0100 (CET)","from ideasonboard.com (unknown\n\t[IPv6:2a00:6020:448c:6c00:7f76:a386:d798:7544])\n\tby perceval.ideasonboard.com (Postfix) with UTF8SMTPSA id 32FB618D7; \n\tTue, 20 Jan 2026 09:45:34 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"k7435YHP\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1768898734;\n\tbh=OidrM49Hyx9J+ESnrJB6SegC1GcDkuwWcSVuhdfK2Uc=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=k7435YHPoi3ZxmHMa50zLCWoVYZ/vPWwZ8e14f7eN3v++PNtUGyWcegeDx7gWtO++\n\tKRgTF5DjSPEnE6bdEOenW2Sx3sapHs5KfYen4In0ayJKFT2t9vuNV4Tt2biyRhq1Ko\n\t7mKNC5syj0C96TLzET3eLe8fmCi32tYER+XpabBY=","From":"Stefan Klug ","Date":"Tue, 20 Jan 2026 09:45:46 +0100","Subject":"[PATCH v4 04/14] ipa: rkisp1: lsc: Rename res to positions","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"8bit","Message-Id":"<20260120-sklug-lsc-resampling-v2-dev-v4-4-2411c4be6d6d@ideasonboard.com>","References":"<20260120-sklug-lsc-resampling-v2-dev-v4-0-2411c4be6d6d@ideasonboard.com>","In-Reply-To":"<20260120-sklug-lsc-resampling-v2-dev-v4-0-2411c4be6d6d@ideasonboard.com>","To":"libcamera-devel@lists.libcamera.org","Cc":"Stefan Klug , =?utf-8?q?Barnab=C3=A1s_P?=\n\t=?utf-8?b?xZFjemU=?= ,\n\tRui Wang ","X-Mailer":"b4 0.14.2","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":"Rename the res variable to positions which better describes the intent.\nThis was commented in review after being merged.\n\nWhile at it, improve the documentation a bit.\n\nSigned-off-by: Stefan Klug \nReviewed-by: Barnabás Pőcze \nReviewed-by: Rui Wang \n\n---\n\nChanges in v2:\n- Collected tags\n---\n src/ipa/rkisp1/algorithms/lsc.cpp | 18 ++++++++++--------\n 1 file changed, 10 insertions(+), 8 deletions(-)","diff":"diff --git a/src/ipa/rkisp1/algorithms/lsc.cpp b/src/ipa/rkisp1/algorithms/lsc.cpp\nindex c581e6441853d18618284b51bfa25c25e1fc8083..bb58386ae646ad6089322ba63d2a9e89664884d2 100644\n--- a/src/ipa/rkisp1/algorithms/lsc.cpp\n+++ b/src/ipa/rkisp1/algorithms/lsc.cpp\n@@ -132,9 +132,11 @@ public:\n \n private:\n \t/*\n-\t * The lsc grid has custom spacing defined on half the range (see\n-\t * parseSizes() for details). For easier handling this function converts\n-\t * the spaces vector to positions and mirrors them. E.g.:\n+\t * The rkisp1 LSC grid spacing is defined by the cell sizes on the first\n+\t * half of the grid. This is then mirrored in hardware to the other\n+\t * half. See parseSizes() for further details. For easier handling, this\n+\t * function converts the cell sizes of half the grid to a list of\n+\t * position of the whole grid (on one axis). Example:\n \t *\n \t * input: | 0.2 | 0.3 |\n \t * output: 0.0 0.2 0.5 0.8 1.0\n@@ -142,17 +144,17 @@ private:\n \tstd::vector sizesListToPositions(const std::vector &sizes)\n \t{\n \t\tconst int half = sizes.size();\n-\t\tstd::vector res(half * 2 + 1);\n+\t\tstd::vector positions(half * 2 + 1);\n \t\tdouble x = 0.0;\n \n-\t\tres[half] = 0.5;\n+\t\tpositions[half] = 0.5;\n \t\tfor (int i = 1; i <= half; i++) {\n \t\t\tx += sizes[half - i];\n-\t\t\tres[half - i] = 0.5 - x;\n-\t\t\tres[half + i] = 0.5 + x;\n+\t\t\tpositions[half - i] = 0.5 - x;\n+\t\t\tpositions[half + i] = 0.5 + x;\n \t\t}\n \n-\t\treturn res;\n+\t\treturn positions;\n \t}\n \n \tstd::vector samplePolynomial(const LscPolynomial &poly)\n","prefixes":["v4","04/14"]}