{"id":11862,"url":"https://patchwork.libcamera.org/api/patches/11862/?format=json","web_url":"https://patchwork.libcamera.org/patch/11862/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","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libcamera: ipu3: Report sensor timestamp","commit_ref":null,"pull_url":null,"state":"superseded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/people/3/?format=json","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/series/1902/?format=json","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":"","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 ;\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 ;\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 ","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":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"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 \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"]}