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GET /api/1.1/patches/11862/?format=api
{ "id": 11862, "url": "https://patchwork.libcamera.org/api/1.1/patches/11862/?format=api", "web_url": "https://patchwork.libcamera.org/patch/11862/", "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": "<20210407160644.58326-3-jacopo@jmondi.org>", "date": "2021-04-07T16:06:43", "name": "[libcamera-devel,2/3] libcamera: ipu3: Report sensor timestamp", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "c5b586c8c894a8f23eaaf5fe4bdb37a285c0a75a", "submitter": { "id": 3, "url": "https://patchwork.libcamera.org/api/1.1/people/3/?format=api", "name": "Jacopo Mondi", "email": "jacopo@jmondi.org" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/11862/mbox/", "series": [ { "id": 1902, "url": "https://patchwork.libcamera.org/api/1.1/series/1902/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=1902", "date": "2021-04-07T16:06:41", "name": "libcamera: Add sensor timestamp support", "version": 1, "mbox": "https://patchwork.libcamera.org/series/1902/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/11862/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/11862/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 B1097BD1F6\n\tfor <parsemail@patchwork.libcamera.org>;\n\tWed, 7 Apr 2021 16:06:17 +0000 (UTC)", "from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 616D9687E3;\n\tWed, 7 Apr 2021 18:06:17 +0200 (CEST)", "from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net\n\t[217.70.183.196])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id EB7F2687D3\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tWed, 7 Apr 2021 18:06:14 +0200 (CEST)", "from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233])\n\t(Authenticated sender: jacopo@jmondi.org)\n\tby relay4-d.mail.gandi.net (Postfix) with ESMTPSA id 40350E000E;\n\tWed, 7 Apr 2021 16:06:14 +0000 (UTC)" ], "X-Originating-IP": "93.34.118.233", "From": "Jacopo Mondi <jacopo@jmondi.org>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Wed, 7 Apr 2021 18:06:43 +0200", "Message-Id": "<20210407160644.58326-3-jacopo@jmondi.org>", "X-Mailer": "git-send-email 2.31.1", "In-Reply-To": "<20210407160644.58326-1-jacopo@jmondi.org>", "References": "<20210407160644.58326-1-jacopo@jmondi.org>", "MIME-Version": "1.0", "Subject": "[libcamera-devel] [PATCH 2/3] libcamera: ipu3: Report sensor\n\ttimestamp", "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>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "libcamera-devel-bounces@lists.libcamera.org", "Sender": "\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>" }, "content": "Report the sensor's timestamp in the Request metadata by using the\nCIO2 buffer timestamp as a good-enough approximation.\n\nThe buffer's timestamp is recorded at DMA-transfer time, and it does not\ntheoretically matches the 'start of exposure' definition, but when used\nto compare two consecutive frames it gives an acceptable estimation of\nthe sensor frame period duration.\n\nSigned-off-by: Jacopo Mondi <jacopo@jmondi.org>\n---\n src/libcamera/pipeline/ipu3/ipu3.cpp | 9 +++++++++\n 1 file changed, 9 insertions(+)", "diff": "diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp\nindex 519cad4f8148..d52e24f847a2 100644\n--- a/src/libcamera/pipeline/ipu3/ipu3.cpp\n+++ b/src/libcamera/pipeline/ipu3/ipu3.cpp\n@@ -1251,6 +1251,15 @@ void IPU3CameraData::cio2BufferReady(FrameBuffer *buffer)\n \n \tRequest *request = info->request;\n \n+\t/*\n+\t * Record the sensor's timestamp in the request metadata.\n+\t *\n+\t * \\todo The sensor timestamp should be better estimated by connecting\n+\t * to the V4L2Device::frameStart signal.\n+\t */\n+\trequest->metadata().set(controls::SensorTimestamp,\n+\t\t\t\tbuffer->metadata().timestamp);\n+\n \t/* If the buffer is cancelled force a complete of the whole request. */\n \tif (buffer->metadata().status == FrameMetadata::FrameCancelled) {\n \t\tfor (auto it : request->buffers())\n", "prefixes": [ "libcamera-devel", "2/3" ] }