{"id":25648,"url":"https://patchwork.libcamera.org/api/patches/25648/?format=json","web_url":"https://patchwork.libcamera.org/patch/25648/","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":"<20260106165754.1759831-19-barnabas.pocze@ideasonboard.com>","date":"2026-01-06T16:57:50","name":"[v4,18/22,DNI] apps: cam: Use Camera::metadataAvailable signal","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"5cd5109caf0fe74e0fd227262552348e6441471a","submitter":{"id":216,"url":"https://patchwork.libcamera.org/api/people/216/?format=json","name":"Barnabás Pőcze","email":"barnabas.pocze@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/25648/mbox/","series":[{"id":5688,"url":"https://patchwork.libcamera.org/api/series/5688/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5688","date":"2026-01-06T16:57:32","name":"libcamera: Add `MetadataList`","version":4,"mbox":"https://patchwork.libcamera.org/series/5688/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/25648/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/25648/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 50979C32DE\n\tfor ;\n\tTue, 6 Jan 2026 16:58:20 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 60FAD61FC2;\n\tTue, 6 Jan 2026 17:58:17 +0100 (CET)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 6FD1261FD3\n\tfor ;\n\tTue, 6 Jan 2026 17:58:02 +0100 (CET)","from pb-laptop.local (185.221.143.114.nat.pool.zt.hu\n\t[185.221.143.114])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 723DFF01;\n\tTue, 6 Jan 2026 17:57:41 +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=\"D/azjUv2\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1767718661;\n\tbh=ZC5EPr5ineHVPVIA2ehyJ5iSyDQ7KboRV6q1+mxMD5U=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=D/azjUv2VzXJ7r1I7oWjPMHKXDXTVQFy5/U6v6CEbeJiR5cclVpPVKgvnowgRLcqD\n\tWXue4EL2FZQOKxHJVY+qYebjp0COif5eEdJrc64O35KpYKvkMNl457Iz9bzcTB5uAP\n\t82LkNtMuIo9C7A70ogLAMeCB4Fbpkq4opwUlgLZA=","From":"=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= ","To":"libcamera-devel@lists.libcamera.org","Cc":"Jacopo Mondi ","Subject":"[PATCH v4 18/22] [DNI] apps: cam: Use Camera::metadataAvailable\n\tsignal","Date":"Tue, 6 Jan 2026 17:57:50 +0100","Message-ID":"<20260106165754.1759831-19-barnabas.pocze@ideasonboard.com>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260106165754.1759831-1-barnabas.pocze@ideasonboard.com>","References":"<20260106165754.1759831-1-barnabas.pocze@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":"From: Jacopo Mondi \n\nHandle the Camera::metadataAvailable signal and print the metadata\nlist.\n\nUse the --metadata option of cam to validate that the metadata list\nin Request::metadata() matches the accumulated results.\n---\nOriginal: https://patchwork.libcamera.org/patch/22234/\n---\n src/apps/cam/camera_session.cpp | 11 +++++++++++\n 1 file changed, 11 insertions(+)","diff":"diff --git a/src/apps/cam/camera_session.cpp b/src/apps/cam/camera_session.cpp\nindex 610279c24..ba43220d1 100644\n--- a/src/apps/cam/camera_session.cpp\n+++ b/src/apps/cam/camera_session.cpp\n@@ -311,6 +311,17 @@ int CameraSession::start()\n \n \tcamera_->requestCompleted.connect(this, &CameraSession::requestComplete);\n \n+\tif (printMetadata_) {\n+\t\tcamera_->metadataAvailable.connect(this, [](Request *r, MetadataList::Diff update) {\n+\t\t\tstd::cout << \">> early metadata for \" << r->sequence() << \" with \" << update.size() << \" entries {\\n\";\n+\t\t\tfor (auto &&[tag, v] : update) {\n+\t\t\t\tconst auto *id = controls::controls.at(tag);\n+\t\t\t\tstd::cout << '\\t' << id->name() << \" = \" << v << '\\n';\n+\t\t\t}\n+\t\t\tstd::cout << \"}\" << std::endl;\n+\t\t});\n+\t}\n+\n #ifdef HAVE_KMS\n \tif (options_.isSet(OptDisplay))\n \t\tsink_ = std::make_unique(options_[OptDisplay].toString());\n","prefixes":["v4","18/22","DNI"]}