{"id":1502,"url":"https://patchwork.libcamera.org/api/1.1/patches/1502/?format=json","web_url":"https://patchwork.libcamera.org/patch/1502/","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":"<20190621161401.28337-10-kieran.bingham@ideasonboard.com>","date":"2019-06-21T16:14:01","name":"[libcamera-devel,RFC,v2,9/9,PoC] QCam: Control demo: A SineWave Brightness","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"b964fee38de0b0e271a21e64a3f78302facc1a7e","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/1.1/people/4/?format=json","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/1502/mbox/","series":[{"id":370,"url":"https://patchwork.libcamera.org/api/1.1/series/370/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=370","date":"2019-06-21T16:13:52","name":"Libcamera Controls","version":2,"mbox":"https://patchwork.libcamera.org/series/370/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/1502/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/1502/checks/","tags":{},"headers":{"Return-Path":"","Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 10367600F7\n\tfor ;\n\tFri, 21 Jun 2019 18:14:09 +0200 (CEST)","from localhost.localdomain\n\t(cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id A59B9E0C;\n\tFri, 21 Jun 2019 18:14:08 +0200 (CEST)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1561133648;\n\tbh=Wrhp2qftXZQNb0Emd9HGLPJnBdzpg7oEbuvLHCsDqaw=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=AwWoTgoAz9LHwFYHNdU62HcqR5Y9hZ6qrwFa+KIkPNBDEmcz1qifjuLVkgYNsWFrq\n\tQGlrDB1k9yO0ol3TMg9mZ4OlqO/LfBmVM/f7b0qBhEJUSxSueopPVwBUCT868GEO99\n\tKsqs1jYQpKi+ic1ajeZcVewCiYPHvTKLEYayD+GE=","From":"Kieran Bingham ","To":"LibCamera Devel ","Date":"Fri, 21 Jun 2019 17:14:01 +0100","Message-Id":"<20190621161401.28337-10-kieran.bingham@ideasonboard.com>","X-Mailer":"git-send-email 2.20.1","In-Reply-To":"<20190621161401.28337-1-kieran.bingham@ideasonboard.com>","References":"<20190621161401.28337-1-kieran.bingham@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [RFC PATCH v2 9/9] [PoC] QCam: Control demo: A\n\tSineWave Brightness","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.23","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","X-List-Received-Date":"Fri, 21 Jun 2019 16:14:09 -0000"},"content":"As an example of how to add a control to each request, set the\nBrightness value with a changing value against the buffer time stamps.\nThe Brightness will go up and down following a sine wave to visualise\nthe control effect on the video stream.\n\nSigned-off-by: Kieran Bingham \n---\n src/qcam/main_window.cpp | 16 ++++++++++++++++\n 1 file changed, 16 insertions(+)","diff":"diff --git a/src/qcam/main_window.cpp b/src/qcam/main_window.cpp\nindex 8c55941f137b..1449e020c815 100644\n--- a/src/qcam/main_window.cpp\n+++ b/src/qcam/main_window.cpp\n@@ -5,6 +5,7 @@\n * main_window.cpp - qcam - Main application window\n */\n \n+#include \n #include \n #include \n #include \n@@ -219,6 +220,13 @@ void MainWindow::stopCapture()\n \tconfig_.reset();\n }\n \n+int SineWaveValue(Buffer *buffer)\n+{\n+\tunsigned int millisec = buffer->timestamp() / 1000000;\n+\tconstexpr float rads = 2 * M_PI / 180;\n+\treturn sin(0.036 * rads * millisec) * 100;\n+}\n+\n void MainWindow::requestComplete(Request *request,\n \t\t\t\t const std::map &buffers)\n {\n@@ -260,6 +268,14 @@ void MainWindow::requestComplete(Request *request,\n \t\treturn;\n \t}\n \n+\t/*\n+\t * A demonstration control, which has a distinct visual effect.\n+\t * Scale the brightness up and down with a sine wave.\n+\t */\n+\t/* How do we deal with max/min/defaults etc? */\n+\trequest->controls()[ManualBrightness] = SineWaveValue(buffer);\n+\trequest->controls().update(ManualGain, SineWaveValue(buffer));\n+\n \trequest->setBuffers(buffers);\n \tcamera_->queueRequest(request);\n }\n","prefixes":["libcamera-devel","RFC","v2","9/9","PoC"]}