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{ "id": 27587, "url": "https://patchwork.libcamera.org/api/patches/27587/?format=api", "web_url": "https://patchwork.libcamera.org/patch/27587/", "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": "<20260803131435.153927-39-barnabas.pocze@ideasonboard.com>", "date": "2026-08-03T13:14:23", "name": "[RFC,v3,38/50] ipa: simple: agc: Simplify min gain step handling", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "023988f41a9f7d8f4a6da46c471df2f9759b94fa", "submitter": { "id": 216, "url": "https://patchwork.libcamera.org/api/people/216/?format=api", "name": "Barnabás Pőcze", "email": "barnabas.pocze@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/27587/mbox/", "series": [ { "id": 6103, "url": "https://patchwork.libcamera.org/api/series/6103/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=6103", "date": "2026-08-03T13:13:45", "name": "ipa: libipa: agc rework", "version": 3, "mbox": "https://patchwork.libcamera.org/series/6103/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/27587/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/27587/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 3CEF3C3346\n\tfor <parsemail@patchwork.libcamera.org>;\n\tMon, 3 Aug 2026 13:15:22 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 269D7680E6;\n\tMon, 3 Aug 2026 15:15:19 +0200 (CEST)", "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 83AB5680A8\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 3 Aug 2026 15:14:47 +0200 (CEST)", "from pb-laptop.local (185.221.141.208.nat.pool.zt.hu\n\t[185.221.141.208])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 9DAB25B3\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon, 3 Aug 2026 15:13:38 +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=\"AuDVcWrS\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1785762818;\n\tbh=3VJsg23vpRZkimnUndQSKOVsX62mssI5yD3j+TV5wQ0=;\n\th=From:To:Subject:Date:In-Reply-To:References:From;\n\tb=AuDVcWrS62cDpjbQkMchF5H/XDZ0J4IHeHdWo6NFzvm3jTsgiJpg0kc5nPQQqKD/e\n\twQkYK1yh5WzbocxfPkb+AcQLkaLnbA/j7cUKATkxSqGRcTPwYEY1lhG7YWUNV9RTQp\n\trK/Ridzu7Dj+lqrXI93TtZsq0QzDF1bFDVzf8Cw0=", "From": "=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= <barnabas.pocze@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Subject": "[RFC PATCH v3 38/50] ipa: simple: agc: Simplify min gain step\n\thandling", "Date": "Mon, 3 Aug 2026 15:14:23 +0200", "Message-ID": "<20260803131435.153927-39-barnabas.pocze@ideasonboard.com>", "X-Mailer": "git-send-email 2.55.0", "In-Reply-To": "<20260803131435.153927-1-barnabas.pocze@ideasonboard.com>", "References": "<20260803131435.153927-1-barnabas.pocze@ideasonboard.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "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>", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Use `std::{min,max}()` just like it is done for the exposure.\n\nSigned-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>\n---\n src/ipa/simple/algorithms/agc.cpp | 10 ++--------\n 1 file changed, 2 insertions(+), 8 deletions(-)", "diff": "diff --git a/src/ipa/simple/algorithms/agc.cpp b/src/ipa/simple/algorithms/agc.cpp\nindex f959abeba5..b25c303835 100644\n--- a/src/ipa/simple/algorithms/agc.cpp\n+++ b/src/ipa/simple/algorithms/agc.cpp\n@@ -130,19 +130,13 @@ void Agc::updateExposure(IPAContext &context, IPAFrameContext &frameContext, dou\n \t\t\texposure = std::max(next, exposure + 1);\n \t\t} else {\n \t\t\tdouble next = again * factor;\n-\t\t\tif (next - again < context.configuration.agc.againMinStep)\n-\t\t\t\tagain += context.configuration.agc.againMinStep;\n-\t\t\telse\n-\t\t\t\tagain = next;\n+\t\t\tagain = std::max(next, again + context.configuration.agc.againMinStep);\n \t\t}\n \t} else {\n \t\t/* Scene too bright: decrease gain first, then exposure. */\n \t\tif (again > context.configuration.agc.again10) {\n \t\t\tdouble next = again * factor;\n-\t\t\tif (again - next < context.configuration.agc.againMinStep)\n-\t\t\t\tagain -= context.configuration.agc.againMinStep;\n-\t\t\telse\n-\t\t\t\tagain = next;\n+\t\t\tagain = std::max(next, again - context.configuration.agc.againMinStep);\n \t\t} else {\n \t\t\tuint32_t next = exposure * factor;\n \t\t\texposure = std::min(next, exposure - 1);\n", "prefixes": [ "RFC", "v3", "38/50" ] }