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{ "id": 22228, "url": "https://patchwork.libcamera.org/api/patches/22228/?format=api", "web_url": "https://patchwork.libcamera.org/patch/22228/", "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": "<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/people/143/?format=api", "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/series/4858/?format=api", "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": "<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 65522BE173\n\tfor <parsemail@patchwork.libcamera.org>;\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 <libcamera-devel@lists.libcamera.org>;\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 <jacopo.mondi@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Cc": "Jacopo Mondi <jacopo.mondi@ideasonboard.com>,\n\tHarvey Yang <chenghaoyang@chromium.org>,\n\tHan-Lin Chen <hanlinchen@chromium.org>", "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": "<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": "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 <jacopo.mondi@ideasonboard.com>\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" ] }