{"id":1567,"url":"https://patchwork.libcamera.org/api/1.1/patches/1567/?format=json","web_url":"https://patchwork.libcamera.org/patch/1567/","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":"<20190701201504.28487-9-laurent.pinchart@ideasonboard.com>","date":"2019-07-01T20:14:59","name":"[libcamera-devel,v4,08/13] libcamera: pipeline: uvcvideo: Add controls support","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"383ad32fff5278b8bcd2bb7230fda79327125b14","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/1.1/people/2/?format=json","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/1567/mbox/","series":[{"id":386,"url":"https://patchwork.libcamera.org/api/1.1/series/386/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=386","date":"2019-07-01T20:14:51","name":"libcamera Controls","version":4,"mbox":"https://patchwork.libcamera.org/series/386/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/1567/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/1567/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 D48FB6157C\n\tfor ;\n\tMon, 1 Jul 2019 22:15:30 +0200 (CEST)","from pendragon.bb.dnainternet.fi\n\t(dfj612yhrgyx302h3jwwy-3.rev.dnainternet.fi\n\t[IPv6:2001:14ba:21f5:5b00:ce28:277f:58d7:3ca4])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 85F61120A\n\tfor ;\n\tMon, 1 Jul 2019 22:15:30 +0200 (CEST)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1562012130;\n\tbh=gnNyFf9fr4k5EzjFRlCoBTokKL0/EqCb1DMlcs9KmZ0=;\n\th=From:To:Subject:Date:In-Reply-To:References:From;\n\tb=P58Zr370/CPJc65Zw5GQdwH88tOtBPG0slS9mc28Lqy/LlHJRRImCaStG2md0dMP4\n\tifnsRBwYBYgsLcUMet2J+j8nFkyAMCB13sXIiwRX+hFkSVyre1gAaXbJYpCXRQAPTl\n\t10VV5AxzLNmkHegysINs66+cgwmhAdEmU3lIBrmw=","From":"Laurent Pinchart ","To":"libcamera-devel@lists.libcamera.org","Date":"Mon, 1 Jul 2019 23:14:59 +0300","Message-Id":"<20190701201504.28487-9-laurent.pinchart@ideasonboard.com>","X-Mailer":"git-send-email 2.21.0","In-Reply-To":"<20190701201504.28487-1-laurent.pinchart@ideasonboard.com>","References":"<20190701201504.28487-1-laurent.pinchart@ideasonboard.com>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v4 08/13] libcamera: pipeline: uvcvideo:\n\tAdd controls support","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":"Mon, 01 Jul 2019 20:15:31 -0000"},"content":"From: Kieran Bingham \n\nImplement control support in the UVC pipeline handler by dynamically\nquerying the V4L2 device for the supported V4L2 controls and populating\nthe list of camera controls accordingly.\n\nNot-signed-off-by: Kieran Bingham \nSigned-off-by: Laurent Pinchart \n---\nChanges since v3:\n\n- Fixed error checking when setting controls\n- Fixed handling of the failure to find a default video device\n---\n src/libcamera/pipeline/uvcvideo.cpp | 124 +++++++++++++++++++++++++---\n 1 file changed, 114 insertions(+), 10 deletions(-)","diff":"diff --git a/src/libcamera/pipeline/uvcvideo.cpp b/src/libcamera/pipeline/uvcvideo.cpp\nindex 2e22523d7cb1..b2f5b2eeed80 100644\n--- a/src/libcamera/pipeline/uvcvideo.cpp\n+++ b/src/libcamera/pipeline/uvcvideo.cpp\n@@ -6,8 +6,11 @@\n */\n \n #include \n+#include \n+#include \n \n #include \n+#include \n #include \n #include \n \n@@ -16,6 +19,7 @@\n #include \"media_device.h\"\n #include \"pipeline_handler.h\"\n #include \"utils.h\"\n+#include \"v4l2_controls.h\"\n #include \"v4l2_videodevice.h\"\n \n namespace libcamera {\n@@ -35,6 +39,7 @@ public:\n \t\tdelete video_;\n \t}\n \n+\tint init(MediaEntity *entity);\n \tvoid bufferReady(Buffer *buffer);\n \n \tV4L2VideoDevice *video_;\n@@ -71,6 +76,8 @@ public:\n \tbool match(DeviceEnumerator *enumerator) override;\n \n private:\n+\tint processControls(UVCCameraData *data, Request *request);\n+\n \tUVCCameraData *cameraData(const Camera *camera)\n \t{\n \t\treturn static_cast(\n@@ -216,6 +223,56 @@ void PipelineHandlerUVC::stop(Camera *camera)\n \tPipelineHandler::stop(camera);\n }\n \n+int PipelineHandlerUVC::processControls(UVCCameraData *data, Request *request)\n+{\n+\tV4L2ControlList controls;\n+\n+\tfor (auto it : request->controls()) {\n+\t\tconst ControlInfo *ci = it.first;\n+\t\tControlValue &value = it.second;\n+\n+\t\tswitch (ci->id()) {\n+\t\tcase Brightness:\n+\t\t\tcontrols.add(V4L2_CID_BRIGHTNESS, value.getInt());\n+\t\t\tbreak;\n+\n+\t\tcase Contrast:\n+\t\t\tcontrols.add(V4L2_CID_CONTRAST, value.getInt());\n+\t\t\tbreak;\n+\n+\t\tcase Saturation:\n+\t\t\tcontrols.add(V4L2_CID_SATURATION, value.getInt());\n+\t\t\tbreak;\n+\n+\t\tcase ManualExposure:\n+\t\t\tcontrols.add(V4L2_CID_EXPOSURE_AUTO, 1);\n+\t\t\tcontrols.add(V4L2_CID_EXPOSURE_ABSOLUTE, value.getInt());\n+\t\t\tbreak;\n+\n+\t\tcase ManualGain:\n+\t\t\tcontrols.add(V4L2_CID_GAIN, value.getInt());\n+\t\t\tbreak;\n+\n+\t\tdefault:\n+\t\t\tbreak;\n+\t\t}\n+\t}\n+\n+\tfor (const V4L2Control &ctrl : controls)\n+\t\tLOG(UVC, Debug)\n+\t\t\t<< \"Setting control 0x\"\n+\t\t\t<< std::hex << std::setw(8) << ctrl.id() << std::dec\n+\t\t\t<< \" to \" << ctrl.value();\n+\n+\tint ret = data->video_->setControls(&controls);\n+\tif (ret) {\n+\t\tLOG(UVC, Error) << \"Failed to set controls: \" << ret;\n+\t\treturn ret < 0 ? ret : -EINVAL;\n+\t}\n+\n+\treturn ret;\n+}\n+\n int PipelineHandlerUVC::queueRequest(Camera *camera, Request *request)\n {\n \tUVCCameraData *data = cameraData(camera);\n@@ -227,7 +284,11 @@ int PipelineHandlerUVC::queueRequest(Camera *camera, Request *request)\n \t\treturn -ENOENT;\n \t}\n \n-\tint ret = data->video_->queueBuffer(buffer);\n+\tint ret = processControls(data, request);\n+\tif (ret < 0)\n+\t\treturn ret;\n+\n+\tret = data->video_->queueBuffer(buffer);\n \tif (ret < 0)\n \t\treturn ret;\n \n@@ -247,24 +308,20 @@ bool PipelineHandlerUVC::match(DeviceEnumerator *enumerator)\n \n \tstd::unique_ptr data = utils::make_unique(this);\n \n-\t/* Locate and open the default video node. */\n+\t/* Locate and initialise the camera data with the default video node. */\n \tfor (MediaEntity *entity : media->entities()) {\n \t\tif (entity->flags() & MEDIA_ENT_FL_DEFAULT) {\n-\t\t\tdata->video_ = new V4L2VideoDevice(entity);\n+\t\t\tif (data->init(entity))\n+\t\t\t\treturn false;\n \t\t\tbreak;\n \t\t}\n \t}\n \n-\tif (!data->video_) {\n+\tif (!data) {\n \t\tLOG(UVC, Error) << \"Could not find a default video device\";\n-\t\treturn false;\n+\t\treturn -ENODEV;\n \t}\n \n-\tif (data->video_->open())\n-\t\treturn false;\n-\n-\tdata->video_->bufferReady.connect(data.get(), &UVCCameraData::bufferReady);\n-\n \t/* Create and register the camera. */\n \tstd::set streams{ &data->stream_ };\n \tstd::shared_ptr camera = Camera::create(this, media->model(), streams);\n@@ -276,6 +333,53 @@ bool PipelineHandlerUVC::match(DeviceEnumerator *enumerator)\n \treturn true;\n }\n \n+int UVCCameraData::init(MediaEntity *entity)\n+{\n+\tint ret;\n+\n+\t/* Create and open the video device. */\n+\tvideo_ = new V4L2VideoDevice(entity);\n+\tret = video_->open();\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tvideo_->bufferReady.connect(this, &UVCCameraData::bufferReady);\n+\n+\t/* Initialise the supported controls. */\n+\tconst V4L2ControlInfoMap &controls = video_->controls();\n+\tfor (const auto &ctrl : controls) {\n+\t\tunsigned int v4l2Id = ctrl.first;\n+\t\tconst V4L2ControlInfo &info = ctrl.second;\n+\t\tControlId id;\n+\n+\t\tswitch (v4l2Id) {\n+\t\tcase V4L2_CID_BRIGHTNESS:\n+\t\t\tid = Brightness;\n+\t\t\tbreak;\n+\t\tcase V4L2_CID_CONTRAST:\n+\t\t\tid = Contrast;\n+\t\t\tbreak;\n+\t\tcase V4L2_CID_SATURATION:\n+\t\t\tid = Saturation;\n+\t\t\tbreak;\n+\t\tcase V4L2_CID_EXPOSURE_ABSOLUTE:\n+\t\t\tid = ManualExposure;\n+\t\t\tbreak;\n+\t\tcase V4L2_CID_GAIN:\n+\t\t\tid = ManualGain;\n+\t\t\tbreak;\n+\t\tdefault:\n+\t\t\tcontinue;\n+\t\t}\n+\n+\t\tcontrolInfo_.emplace(std::piecewise_construct,\n+\t\t\t\t std::forward_as_tuple(id),\n+\t\t\t\t std::forward_as_tuple(id, info.min(), info.max()));\n+\t}\n+\n+\treturn 0;\n+}\n+\n void UVCCameraData::bufferReady(Buffer *buffer)\n {\n \tRequest *request = queuedRequests_.front();\n","prefixes":["libcamera-devel","v4","08/13"]}