{"id":26987,"url":"https://patchwork.libcamera.org/api/1.1/patches/26987/?format=json","web_url":"https://patchwork.libcamera.org/patch/26987/","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":"<20260618123844.656396-25-barnabas.pocze@ideasonboard.com>","date":"2026-06-18T12:38:41","name":"[RFC,v1,24/27] v4l2: v4l2_camera: Use buffer cookie for indexing","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c2cef62185b8b64b32d9e24b57b8e2c4b90450db","submitter":{"id":216,"url":"https://patchwork.libcamera.org/api/1.1/people/216/?format=json","name":"Barnabás Pőcze","email":"barnabas.pocze@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/26987/mbox/","series":[{"id":6006,"url":"https://patchwork.libcamera.org/api/1.1/series/6006/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=6006","date":"2026-06-18T12:38:17","name":"Misc. changes before request-buffer split","version":1,"mbox":"https://patchwork.libcamera.org/series/6006/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/26987/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/26987/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 4F180C3329\n\tfor ;\n\tThu, 18 Jun 2026 12:39:28 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 4F20C6571B;\n\tThu, 18 Jun 2026 14:39:27 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 51F8362988\n\tfor ;\n\tThu, 18 Jun 2026 14:38:53 +0200 (CEST)","from pb-laptop.local (185.182.214.63.nat.pool.zt.hu\n\t[185.182.214.63])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 6C314DF3\n\tfor ;\n\tThu, 18 Jun 2026 14:38:18 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"PHW0wEEW\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1781786298;\n\tbh=sopiKBDQMtAt07ooCAVtMn05RUsUGv007Kpx1frGX9s=;\n\th=From:To:Subject:Date:In-Reply-To:References:From;\n\tb=PHW0wEEWkCZ58pFgwQjK4geQ8tMk9UWux2UthiBkwScSTrKzL+ESRfXMxpAAASHOA\n\tzXmHjMYY4Nnw0qnuwZbX5+JOV6RIQ8U9YfXeHcDXaGvCJpD5kUQ1Sxs+7vcZWkIxmE\n\tHUunU/1pqI0Kp0pNoHqTYzEXsOpLHo0dc3Jrp+VE=","From":"=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= ","To":"libcamera-devel@lists.libcamera.org","Subject":"[RFC PATCH v1 24/27] v4l2: v4l2_camera: Use buffer cookie for\n\tindexing","Date":"Thu, 18 Jun 2026 14:38:41 +0200","Message-ID":"<20260618123844.656396-25-barnabas.pocze@ideasonboard.com>","X-Mailer":"git-send-email 2.54.0","In-Reply-To":"<20260618123844.656396-1-barnabas.pocze@ideasonboard.com>","References":"<20260618123844.656396-1-barnabas.pocze@ideasonboard.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","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":"Use the buffer cookie to store the index of the buffer instead of\nrelying on the 1-to-1 association between requests and buffers,\nwhich will be broken by the split of requests and buffers.\n\nSigned-off-by: Barnabás Pőcze \n---\n src/v4l2/v4l2_camera.cpp | 4 +++-\n 1 file changed, 3 insertions(+), 1 deletion(-)","diff":"diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp\nindex 75428b8adc..7dd0ea1ef9 100644\n--- a/src/v4l2/v4l2_camera.cpp\n+++ b/src/v4l2/v4l2_camera.cpp\n@@ -87,7 +87,7 @@ void V4L2Camera::requestComplete(Request *request)\n \t/* We only have one stream at the moment. */\n \tbufferLock_.lock();\n \tFrameBuffer *buffer = request->buffers().begin()->second;\n-\tcompletedBuffers_.emplace_back(request->cookie(), buffer->metadata());\n+\tcompletedBuffers_.emplace_back(buffer->cookie(), buffer->metadata());\n \tbufferLock_.unlock();\n \n \tuint64_t data = 1;\n@@ -171,6 +171,8 @@ int V4L2Camera::allocBuffers()\n \t\t\treturn -ENOMEM;\n \t\t}\n \t\trequestPool_.push_back(std::move(request));\n+\n+\t\tbuffers[i]->setCookie(i);\n \t}\n \n \treturn buffers.size();\n","prefixes":["RFC","v1","24/27"]}