{"id":10671,"url":"https://patchwork.libcamera.org/api/patches/10671/?format=json","web_url":"https://patchwork.libcamera.org/patch/10671/","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":"<20201216112202.5063-2-naush@raspberrypi.com>","date":"2020-12-16T11:22:00","name":"[libcamera-devel,v9,1/3] libcamera: controls: Add frame duration control","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"00e10dcde697c49ecfac78f9d944cd5a240b53da","submitter":{"id":34,"url":"https://patchwork.libcamera.org/api/people/34/?format=json","name":"Naushir Patuck","email":"naush@raspberrypi.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/10671/mbox/","series":[{"id":1535,"url":"https://patchwork.libcamera.org/api/series/1535/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1535","date":"2020-12-16T11:21:59","name":"raspberrypi: FPS control","version":9,"mbox":"https://patchwork.libcamera.org/series/1535/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/10671/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/10671/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 24CFAC0F1A\n\tfor ;\n\tWed, 16 Dec 2020 11:22:09 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id CB95561592;\n\tWed, 16 Dec 2020 12:22:08 +0100 (CET)","from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com\n\t[IPv6:2a00:1450:4864:20::42f])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 36CD96158A\n\tfor ;\n\tWed, 16 Dec 2020 12:22:07 +0100 (CET)","by mail-wr1-x42f.google.com with SMTP id q18so15295586wrn.1\n\tfor ;\n\tWed, 16 Dec 2020 03:22:07 -0800 (PST)","from naushir-VirtualBox.pitowers.org\n\t([2a00:1098:3142:14:a00:27ff:fe4d:f6a2])\n\tby smtp.gmail.com with ESMTPSA id\n\tl8sm2766941wrb.73.2020.12.16.03.22.05\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tWed, 16 Dec 2020 03:22:05 -0800 (PST)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=raspberrypi.com header.i=@raspberrypi.com\n\theader.b=\"IOivdRXh\"; 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\n\tWed, 16 Dec 2020 03:22:06 -0800 (PST)","From":"Naushir Patuck ","To":"libcamera-devel@lists.libcamera.org","Date":"Wed, 16 Dec 2020 11:22:00 +0000","Message-Id":"<20201216112202.5063-2-naush@raspberrypi.com>","X-Mailer":"git-send-email 2.25.1","In-Reply-To":"<20201216112202.5063-1-naush@raspberrypi.com>","References":"<20201216112202.5063-1-naush@raspberrypi.com>","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH v9 1/3] libcamera: controls: Add frame\n\tduration control","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","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Add an int64_t array control (controls::FrameDurations) to specify the\nminimum and maximum (in that order) frame duration to be used by the\ncamera sensor.\n\nSigned-off-by: Naushir Patuck \nReviewed-by: David Plowman \nTested-by: David Plowman \nReviewed-by: Jacopo Mondi \n---\n src/libcamera/control_ids.yaml | 40 ++++++++++++++++++++++++++++++++++\n 1 file changed, 40 insertions(+)","diff":"diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml\nindex 6d6f0fee..43a7cfb7 100644\n--- a/src/libcamera/control_ids.yaml\n+++ b/src/libcamera/control_ids.yaml\n@@ -306,6 +306,46 @@ controls:\n maximum valid value is given by the properties::ScalerCropMaximum\n property, and the two can be used to implement digital zoom.\n \n+ - FrameDurations:\n+ type: int64_t\n+ description: |\n+ The minimum and maximum (in that order) frame duration,\n+ expressed in micro-seconds.\n+\n+ When provided by applications, the control specifies the sensor frame\n+ duration interval the pipeline has to use. This could also limit the\n+ largest exposure time the sensor can use. For example, if a maximum\n+ frame duration of 33ms is requested (corresponding to 30 frames per\n+ second), the sensor will not be able to raise the exposure time above\n+ 33ms. A fixed frame duration is achieved by setting the minimum and\n+ maximum values to be the same.\n+\n+ The maximum frame duration provides the absolute limit to the shutter\n+ speed computed by the AE algorithm and it overrides any exposure mode\n+ setting specified with controls::AeExposureMode. Similarly, when a\n+ manual exposure time is set through controls::ExposureTime, it also\n+ gets clipped to the limits set by this control.\n+\n+ \\sa AeExposureMode\n+ \\sa ExposureTime\n+\n+ \\todo Refer to the frame duration limits property to describe how\n+ application-provided values gets clipped and reset.\n+\n+ When reported by pipelines, the control expresses the duration of the\n+ sensor frame used to produce streams part of the completed Request.\n+ The minimum and maximum values shall then be the same, as the sensor\n+ frame duration is a fixed parameter. The sensor frame duration is one\n+ of the parameter that defines the capture frame rate but it does not\n+ alone provide enough information to fully calculate it as it does not\n+ account for pipeline processing delays.\n+\n+ \\todo Define how to calculate the capture frame rate by\n+ defining controls to report additional delays introduced by\n+ the capture pipeline or post-processing stages (ie JPEG\n+ conversion, frame scaling).\n+ size: [2]\n+\n # ----------------------------------------------------------------------------\n # Draft controls section\n \n","prefixes":["libcamera-devel","v9","1/3"]}