From patchwork Mon Aug 10 10:38:34 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= X-Patchwork-Id: 27710 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id C9600BDE4C for ; Mon, 10 Aug 2026 10:39:53 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 266C768241; Mon, 10 Aug 2026 12:39:53 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="AoWb6TYD"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 515BD681F7 for ; Mon, 10 Aug 2026 12:38:59 +0200 (CEST) Received: from pb-laptop.local (185.221.141.208.nat.pool.zt.hu [185.221.141.208]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 5F0354F7C for ; Mon, 10 Aug 2026 12:37:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1786358265; bh=Ox0BFnxqS1UmO/gvcqAUAsRozrA9GT36DS3/fp5dE9M=; h=From:To:Subject:Date:In-Reply-To:References:From; b=AoWb6TYDIdyjk08uxb3lh7jJbtP560LXz1jktLS2YwGH1XmegfokycQQ9fdoMzQ33 Umr7eODIY9yvuqqi/65NyKdGJiqiUPXHyRrHXWSgD2Ln8zlU8LNP8Ru8YBtBaj5BKJ Cu9mAHFw6YRNbY++kynk7cqqdiLsp0VSrFYxmD5g= From: =?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= To: libcamera-devel@lists.libcamera.org Subject: [PATCH v4 38/49] ipa: simple: agc: Simplify min gain step handling Date: Mon, 10 Aug 2026 12:38:34 +0200 Message-ID: <20260810103846.1075936-39-barnabas.pocze@ideasonboard.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260810103846.1075936-1-barnabas.pocze@ideasonboard.com> References: <20260810103846.1075936-1-barnabas.pocze@ideasonboard.com> MIME-Version: 1.0 X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" Use `std::{min,max}()` just like it is done for the exposure. Signed-off-by: Barnabás Pőcze Acked-by: Jacopo Mondi Reviewed-by: Milan Zamazal --- src/ipa/simple/algorithms/agc.cpp | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/src/ipa/simple/algorithms/agc.cpp b/src/ipa/simple/algorithms/agc.cpp index f959abeba5..5307fda953 100644 --- a/src/ipa/simple/algorithms/agc.cpp +++ b/src/ipa/simple/algorithms/agc.cpp @@ -130,19 +130,13 @@ void Agc::updateExposure(IPAContext &context, IPAFrameContext &frameContext, dou exposure = std::max(next, exposure + 1); } else { double next = again * factor; - if (next - again < context.configuration.agc.againMinStep) - again += context.configuration.agc.againMinStep; - else - again = next; + again = std::max(next, again + context.configuration.agc.againMinStep); } } else { /* Scene too bright: decrease gain first, then exposure. */ if (again > context.configuration.agc.again10) { double next = again * factor; - if (again - next < context.configuration.agc.againMinStep) - again -= context.configuration.agc.againMinStep; - else - again = next; + again = std::min(next, again - context.configuration.agc.againMinStep); } else { uint32_t next = exposure * factor; exposure = std::min(next, exposure - 1);