From patchwork Fri Nov 19 21:02:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 14663 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 EE17EBF415 for ; Fri, 19 Nov 2021 21:03:09 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 8FC55603B5; Fri, 19 Nov 2021 22:03:09 +0100 (CET) Authentication-Results: lancelot.ideasonboard.com; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="IpvSD2sk"; 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 9C3F460233 for ; Fri, 19 Nov 2021 22:03:05 +0100 (CET) Received: from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 449821C72 for ; Fri, 19 Nov 2021 22:03:05 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1637355785; bh=rxvkaSWwq7rCGBvSitrsNFQ825869nmLjV8jJ8rxnFI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=IpvSD2sk3rVRSVTnbZMRwblgYlyEpc2t7iemfQYMV6/1kuSbGg7u4syvhyPY3I22p zEuwUSL9H50Rlx0AFMjTZhnFtAZiT4vWbvl9mT4zgu3qAOFKqBgUoNcg1euP/CjUTw i0k8bW6PRabWMBtqBgSc6Kp3KhVf8yRMFJ2DVSSU= From: Laurent Pinchart To: libcamera-devel@lists.libcamera.org Date: Fri, 19 Nov 2021 23:02:35 +0200 Message-Id: <20211119210239.18540-2-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211119210239.18540-1-laurent.pinchart@ideasonboard.com> References: <20211119210239.18540-1-laurent.pinchart@ideasonboard.com> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v2 1/5] ipa: ipu3: agc: Drop kMaxLuminance constant 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" The kMaxLuminance constant is badly named, it's not a maximum luminance, but the maximum integer value output by the AWB statistics engine for per-channel averages. The constant is used in a single place, hardcoding the value is actually more readable. Signed-off-by: Laurent Pinchart Reviewed-by: Jean-Michel Hautbois Reviewed-by: Kieran Bingham --- src/ipa/ipu3/algorithms/agc.cpp | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp index bd02c474611c..43a39ffd57d6 100644 --- a/src/ipa/ipu3/algorithms/agc.cpp +++ b/src/ipa/ipu3/algorithms/agc.cpp @@ -61,9 +61,6 @@ static constexpr double kEvGainTarget = 0.5; /* Number of frames to wait before calculating stats on minimum exposure */ static constexpr uint32_t kNumStartupFrames = 10; -/* Maximum luminance used for brightness normalization */ -static constexpr uint32_t kMaxLuminance = 255; - /* * Normalized luma value target. * @@ -298,8 +295,7 @@ double Agc::computeInitialY(IPAFrameContext &frameContext, greenSum * frameContext.awb.gains.green * .587 + blueSum * frameContext.awb.gains.blue * .114; - /* Return the normalized relative luminance. */ - return Y_sum / (grid.height * grid.width) / kMaxLuminance; + return Y_sum / (grid.height * grid.width) / 255; } /**