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{ "id": 13276, "url": "https://patchwork.libcamera.org/api/patches/13276/?format=api", "web_url": "https://patchwork.libcamera.org/patch/13276/", "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": "<20210810075854.86191-5-umang.jain@ideasonboard.com>", "date": "2021-08-10T07:58:54", "name": "[libcamera-devel,v2,4/4] ipu3: cio2: Tweak sensor size selection policy", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "6d29b61bd3a9e6b7bf6b6458faa4148240b462b8", "submitter": { "id": 86, "url": "https://patchwork.libcamera.org/api/people/86/?format=api", "name": "Umang Jain", "email": "umang.jain@ideasonboard.com" }, "delegate": { "id": 12, "url": "https://patchwork.libcamera.org/api/users/12/?format=api", "username": "uajain", "first_name": "Umang", "last_name": "Jain", "email": "umang.jain@ideasonboard.com" }, "mbox": "https://patchwork.libcamera.org/patch/13276/mbox/", "series": [ { "id": 2328, "url": "https://patchwork.libcamera.org/api/series/2328/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=2328", "date": "2021-08-10T07:58:50", "name": "ipu3: Change sensor size selection policy", "version": 2, "mbox": "https://patchwork.libcamera.org/series/2328/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/13276/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/13276/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 4663FBD87D\n\tfor <parsemail@patchwork.libcamera.org>;\n\tTue, 10 Aug 2021 07:59:13 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 0995A68886;\n\tTue, 10 Aug 2021 09:59:13 +0200 (CEST)", "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 2E1F168826\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 10 Aug 2021 09:59:11 +0200 (CEST)", "from perceval.ideasonboard.com (unknown [103.238.109.8])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D13A4466;\n\tTue, 10 Aug 2021 09:59:09 +0200 (CEST)" ], "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=\"W/YH3nnk\"; dkim-atps=neutral", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1628582350;\n\tbh=uQXQGCNIbtRwW/wywRTu1eBmJWomvFWYMe38wBqLDy4=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=W/YH3nnkSJlYfrcUea6rK4BtC5JiUXXRgI7L+9fA4ruzEW2Xb+UGK066bsjerYjUJ\n\tZo+h94R7Ap9JQXYk10ueNgZ1wxjtDU1ZA+PkWm2MNXTZEp1a5jrAFOuU8hNtKOiYMN\n\tiIZ617VyDdQp02S4vy1tv0B7A0olzNwXxYVf99bw=", "From": "Umang Jain <umang.jain@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Tue, 10 Aug 2021 13:28:54 +0530", "Message-Id": "<20210810075854.86191-5-umang.jain@ideasonboard.com>", "X-Mailer": "git-send-email 2.31.1", "In-Reply-To": "<20210810075854.86191-1-umang.jain@ideasonboard.com>", "References": "<20210810075854.86191-1-umang.jain@ideasonboard.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 4/4] ipu3: cio2: Tweak sensor size\n\tselection policy", "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": "Do not compare higher precision of the ratios, as it might lead to\nabsurd selection of sensor size for a relatively low requested\nresolution size.\n\nFor example:\nThe imx258 driver supports the following sensor resolutions:\n\n - 4208x3118 = 1.349583066\n - 2104x1560 = 1.348717949\n - 1048x780 = 1.343589744\n\nIt can be inferred that, that the aspect ratio only differs by a small\nfactor with each other. It does not makes sense to select a 4208x3118\nfor a requested size of say 640x480 or 1280x720, which is what is\nhappening currently.\n($) cam -c1 -swidth=640,height=480,role=raw\n - CIO2 configuration: 4208x3118-SGRBG10_IPU3\n\nIn order to address this constraint, only compare the ratio with single\nprecision to make a better decision on the sensor resolution policy\nselection.\n\n($) cam -c1 -srole=raw,width=640,height=480\n - CIO2 configuration: 1048x780-SGRBG10_IPU3\n\nSigned-off-by: Umang Jain <umang.jain@ideasonboard.com>\nTested-by: Umang Jain <umang.jain@ideasonboard.com>\nTested-by: Jacopo Mondi <jacopo@jmondi.org>\n---\n src/libcamera/pipeline/ipu3/cio2.cpp | 5 +++++\n 1 file changed, 5 insertions(+)", "diff": "diff --git a/src/libcamera/pipeline/ipu3/cio2.cpp b/src/libcamera/pipeline/ipu3/cio2.cpp\nindex 3c9331e3..6ccef301 100644\n--- a/src/libcamera/pipeline/ipu3/cio2.cpp\n+++ b/src/libcamera/pipeline/ipu3/cio2.cpp\n@@ -290,6 +290,11 @@ V4L2SubdeviceFormat CIO2Device::getSensorFormat(const std::vector<unsigned int>\n \t\t\t\tcontinue;\n \n \t\t\tfloat ratio = static_cast<float>(sz.width) / sz.height;\n+\t\t\t/*\n+\t\t\t * Comparing ratios with a single precision digit\n+\t\t\t * is enough.\n+\t\t\t */\n+\t\t\tratio = static_cast<unsigned int>(ratio * 10) / 10.0;\n \t\t\tfloat ratioDiff = fabsf(ratio - desiredRatio);\n \t\t\tunsigned int area = sz.width * sz.height;\n \t\t\tunsigned int areaDiff = area - desiredArea;\n", "prefixes": [ "libcamera-devel", "v2", "4/4" ] }