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{ "id": 14596, "url": "https://patchwork.libcamera.org/api/1.1/patches/14596/?format=api", "web_url": "https://patchwork.libcamera.org/patch/14596/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/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": "<20211113084947.21892-7-jeanmichel.hautbois@ideasonboard.com>", "date": "2021-11-13T08:49:39", "name": "[libcamera-devel,v5,06/14] ipa: ipu3: agc: Refactor ev gain calculation and testing", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "23c19e095c36aff65ec8f686ee46cc340ac240df", "submitter": { "id": 75, "url": "https://patchwork.libcamera.org/api/1.1/people/75/?format=api", "name": "Jean-Michel Hautbois", "email": "jeanmichel.hautbois@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/14596/mbox/", "series": [ { "id": 2717, "url": "https://patchwork.libcamera.org/api/1.1/series/2717/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2717", "date": "2021-11-13T08:49:33", "name": "IPA: IPU3: Introduce per-frame controls", "version": 5, "mbox": "https://patchwork.libcamera.org/series/2717/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/14596/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/14596/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 0E80BBDB1C\n\tfor <parsemail@patchwork.libcamera.org>;\n\tSat, 13 Nov 2021 08:50:01 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 0DE01603BE;\n\tSat, 13 Nov 2021 09:49:59 +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 016D960371\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tSat, 13 Nov 2021 09:49:52 +0100 (CET)", "from tatooine.ideasonboard.com (unknown\n\t[IPv6:2a01:e0a:169:7140:4d35:9445:6881:4ffd])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id B14FA1875;\n\tSat, 13 Nov 2021 09:49:51 +0100 (CET)" ], "Authentication-Results": "lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"af6abFfk\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1636793391;\n\tbh=CYzs0lL4OB90psMr5a0ZMVciVBGNeZuxkR+LeIfhqEA=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=af6abFfk+5nFFk7WUGZ8ULaX/ZCRNU1wAJushrUBm1HGF4rKVlAq5yKRds+EJpCjc\n\txPy3Wb97cOkyvHbCQgb5xznlzPsNNf+2dZcHfI0CUT3exSt7D6+Pg8ANjbmYD/DTVn\n\twKsV//34bjXDndK+1ua3HJ9AjOJjV5Bew1ZO6z70=", "From": "Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Sat, 13 Nov 2021 09:49:39 +0100", "Message-Id": "<20211113084947.21892-7-jeanmichel.hautbois@ideasonboard.com>", "X-Mailer": "git-send-email 2.32.0", "In-Reply-To": "<20211113084947.21892-1-jeanmichel.hautbois@ideasonboard.com>", "References": "<20211113084947.21892-1-jeanmichel.hautbois@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v5 06/14] ipa: ipu3: agc: Refactor ev gain\n\tcalculation and testing", "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": "When we compute the new gain, we use the iqMean_ and estimate an\nexposure value gain to apply. Return early when the gain is less than\n1%.\n\nSigned-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>\nReviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>\nReviewed-by: Paul Elder <paul.elder@ideasonboard.com>\n---\n src/ipa/ipu3/algorithms/agc.cpp | 14 ++++++--------\n 1 file changed, 6 insertions(+), 8 deletions(-)", "diff": "diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp\nindex 74bce7bb..61ca8b3f 100644\n--- a/src/ipa/ipu3/algorithms/agc.cpp\n+++ b/src/ipa/ipu3/algorithms/agc.cpp\n@@ -188,14 +188,6 @@ void Agc::filterExposure()\n */\n void Agc::computeExposure(IPAFrameContext &frameContext)\n {\n-\n-\t/* Are we correctly exposed ? */\n-\tif (std::abs(iqMean_ - kEvGainTarget * knumHistogramBins) <= 1) {\n-\t\tLOG(IPU3Agc, Debug) << \"We are well exposed (iqMean = \"\n-\t\t\t\t << iqMean_ << \")\";\n-\t\treturn;\n-\t}\n-\n \t/* Get the effective exposure and gain applied on the sensor. */\n \tuint32_t exposure = frameContext.sensor.exposure;\n \tdouble analogueGain = frameContext.sensor.gain;\n@@ -203,6 +195,12 @@ void Agc::computeExposure(IPAFrameContext &frameContext)\n \t/* Estimate the gain needed to have the proportion wanted */\n \tdouble evGain = kEvGainTarget * knumHistogramBins / iqMean_;\n \n+\tif (std::abs(evGain - 1.0) < 0.01) {\n+\t\tLOG(IPU3Agc, Debug) << \"We are well exposed (iqMean = \"\n+\t\t\t\t << iqMean_ << \")\";\n+\t\treturn;\n+\t}\n+\n \t/* extracted from Rpi::Agc::computeTargetExposure */\n \t/* Calculate the shutter time in seconds */\n \tutils::Duration currentShutter = exposure * lineDuration_;\n", "prefixes": [ "libcamera-devel", "v5", "06/14" ] }