{"id":16199,"url":"https://patchwork.libcamera.org/api/patches/16199/?format=json","web_url":"https://patchwork.libcamera.org/patch/16199/","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":"<20220612152311.8408-3-laurent.pinchart@ideasonboard.com>","date":"2022-06-12T15:23:08","name":"[libcamera-devel,v2,2/5] libcamera: pipeline: simple: Document the pipeline traversal algorithm","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"342f61e178bf2e26814da66bedcc6eee992a4e20","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/people/2/?format=json","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/16199/mbox/","series":[{"id":3170,"url":"https://patchwork.libcamera.org/api/series/3170/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=3170","date":"2022-06-12T15:23:06","name":"libcamera: pipeline: simple: Support scaling on the camea sensor","version":2,"mbox":"https://patchwork.libcamera.org/series/3170/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/16199/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/16199/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 D578BC3274\n\tfor ;\n\tSun, 12 Jun 2022 15:23:28 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7CFBA6563F;\n\tSun, 12 Jun 2022 17:23:27 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 03E8B65633\n\tfor ;\n\tSun, 12 Jun 2022 17:23:25 +0200 (CEST)","from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 72968D24;\n\tSun, 12 Jun 2022 17:23:24 +0200 (CEST)"],"DKIM-Signature":["v=1; 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dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"PzY5EIt1\"; dkim-atps=neutral","To":"libcamera-devel@lists.libcamera.org","Date":"Sun, 12 Jun 2022 18:23:08 +0300","Message-Id":"<20220612152311.8408-3-laurent.pinchart@ideasonboard.com>","X-Mailer":"git-send-email 2.35.1","In-Reply-To":"<20220612152311.8408-1-laurent.pinchart@ideasonboard.com>","References":"<20220612152311.8408-1-laurent.pinchart@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v2 2/5] libcamera: pipeline: simple:\n\tDocument the pipeline traversal algorithm","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","From":"Laurent Pinchart via libcamera-devel\n\t","Reply-To":"Laurent Pinchart ","Cc":"Dorota Czaplejewicz ,\n\tBenjamin Schaaf ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Add a section to the documentation at the top of the file to describe in\na bit more details how the media graph is traversed.\n\nSigned-off-by: Laurent Pinchart \n---\n src/libcamera/pipeline/simple/simple.cpp | 15 +++++++++++++++\n 1 file changed, 15 insertions(+)","diff":"diff --git a/src/libcamera/pipeline/simple/simple.cpp b/src/libcamera/pipeline/simple/simple.cpp\nindex efb28ccd97e8..b09368aee20b 100644\n--- a/src/libcamera/pipeline/simple/simple.cpp\n+++ b/src/libcamera/pipeline/simple/simple.cpp\n@@ -95,6 +95,21 @@ LOG_DEFINE_CATEGORY(SimplePipeline)\n * valid pipeline configurations are found, a Camera is registered for the\n * SimpleCameraData instance.\n *\n+ * Pipeline Traversal\n+ * ------------------\n+ *\n+ * During the breadth-first search, the pipeline is traversed from entity to\n+ * entity, by following media graph links from source to sink, starting at the\n+ * camera sensor. When reaching an entity (on its sink side), all its source\n+ * pads are considered to continue the graph traversal.\n+ *\n+ * The shortest path between the camera sensor and a video node is stored in\n+ * SimpleCameraData::entities_ as a list of SimpleCameraData::Entity structures,\n+ * ordered along the data path from the camera sensor to the video node. The\n+ * Entity structure stores a pointer to the MediaEntity, as well as information\n+ * about how it is connected in that particular path for later usage when\n+ * configuring the pipeline.\n+ *\n * Pipeline Configuration\n * ----------------------\n *\n","prefixes":["libcamera-devel","v2","2/5"]}