{"id":22228,"url":"https://patchwork.libcamera.org/api/1.1/patches/22228/?format=json","web_url":"https://patchwork.libcamera.org/patch/22228/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/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":"<20241206160747.97176-3-jacopo.mondi@ideasonboard.com>","date":"2024-12-06T16:07:40","name":"[2/8] guides: application: Document Camera::metadataAvailable","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"3e728f3fe1311c1ce30a92000691c13ba9ec1b35","submitter":{"id":143,"url":"https://patchwork.libcamera.org/api/1.1/people/143/?format=json","name":"Jacopo Mondi","email":"jacopo.mondi@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/22228/mbox/","series":[{"id":4858,"url":"https://patchwork.libcamera.org/api/1.1/series/4858/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=4858","date":"2024-12-06T16:07:38","name":"libcamera: Support partial metadata completion","version":1,"mbox":"https://patchwork.libcamera.org/series/4858/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/22228/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/22228/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 65522BE173\n\tfor ;\n\tFri, 6 Dec 2024 16:08:03 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A450367E1F;\n\tFri, 6 Dec 2024 17:07:58 +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 8902A67E12\n\tfor ;\n\tFri, 6 Dec 2024 17:07:55 +0100 (CET)","from ideasonboard.com (93-61-96-190.ip145.fastwebnet.it\n\t[93.61.96.190])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id D6944B2B;\n\tFri, 6 Dec 2024 17:07:25 +0100 (CET)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"ZQn3tRkR\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1733501246;\n\tbh=ZQxSVQC7JkMBGUIxuY7w04owyYOBD5nSfjYjQQ69qEk=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=ZQn3tRkRCBEqgzvR2GZffHsSdJOWk903xG78oZV+70beq/faH59tZr7Q55YbOHfFJ\n\tEdKno5Fwg7I21c0eYioabcITwnIjjQQxbLbgeKaOCd6QY4NxtIgFDhSrbScHEX2o8T\n\thH9dTvuhRF2WY6njhN0ojOaWUXStYQfQZRjhM3ps=","From":"Jacopo Mondi ","To":"libcamera-devel@lists.libcamera.org","Cc":"Jacopo Mondi ,\n\tHarvey Yang ,\n\tHan-Lin Chen ","Subject":"[PATCH 2/8] guides: application: Document Camera::metadataAvailable","Date":"Fri, 6 Dec 2024 17:07:40 +0100","Message-ID":"<20241206160747.97176-3-jacopo.mondi@ideasonboard.com>","X-Mailer":"git-send-email 2.47.1","In-Reply-To":"<20241206160747.97176-1-jacopo.mondi@ideasonboard.com>","References":"<20241206160747.97176-1-jacopo.mondi@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","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","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Document the Camera::metadataAvailable signal in the application\ndeveloper guide as an opt-in feature to receive early metadata\nnotifications.\n\nSigned-off-by: Jacopo Mondi \n---\n Documentation/guides/application-developer.rst | 8 ++++++++\n 1 file changed, 8 insertions(+)","diff":"diff --git a/Documentation/guides/application-developer.rst b/Documentation/guides/application-developer.rst\nindex 25beb55d99a3..560bb4464497 100644\n--- a/Documentation/guides/application-developer.rst\n+++ b/Documentation/guides/application-developer.rst\n@@ -357,6 +357,14 @@ Signals and Slots`_) to connect events with callbacks to handle them.\n The ``Camera`` device emits two signals that applications can connect to in\n order to execute callbacks on frame completion events.\n \n+The ``Camera::metadataAvailable`` signal notifies applications of the\n+availability of metadata results before a request completes. Receiving\n+notification about metadata availability allows application to fast-track\n+handling of metadata results before all the image buffers in a request are\n+ready. The full list of metadata results associated with a Request is anyway\n+available at request complete time, and receiving notifications for early\n+metadata availability is an optional feature for applications.\n+\n The ``Camera::bufferCompleted`` signal notifies applications that a buffer with\n image data is available. Receiving notifications about the single buffer\n completion event allows applications to implement partial request completion\n","prefixes":["2/8"]}