Bug fixes and new implementations

- Video format MJPEG implemented (libjpeg/qimage)
- Inactive priorities are now skipped correctly (PriorityMuxer.cpp line 297)
- v4l configuration section replaced with an object (preparation for #542)

CMakeLists.txt

@@ -268,6 +268,18 @@ find_package(libusb-1.0 REQUIRED)
 find_package(Threads REQUIRED)
 add_definitions(${QT_DEFINITIONS})
 
+# Add jpeg library
+if (ENABLE_V4L2)
+	find_package(JPEG)
+	if (JPEG_FOUND)
+		add_definitions(-DHAVE_JPEG)
+		message( STATUS "Using JPEG library: ${JPEG_LIBRARIES}")
+		include_directories(${JPEG_INCLUDE_DIR})
+	else()
+		message( STATUS "JPEG library not found, MJPEG camera format won't work in V4L2 grabber.")
+	endif()
+endif()
+
 # TODO[TvdZ]: This linking directory should only be added if we are cross compiling
 #if(NOT APPLE)
 #	link_directories(${CMAKE_FIND_ROOT_PATH}/lib/arm-linux-gnueabihf)

CompileHowto.md

@@ -26,7 +26,7 @@ Note: call the script with `./docker-compile.sh -h` for more options
 
 ```
 sudo apt-get update
-sudo apt-get install git cmake build-essential qtbase5-dev libqt5serialport5-dev libusb-1.0-0-dev python3-dev libxrender-dev libavahi-core-dev libavahi-compat-libdnssd-dev
+sudo apt-get install git cmake build-essential qtbase5-dev libqt5serialport5-dev libusb-1.0-0-dev python3-dev libxrender-dev libavahi-core-dev libavahi-compat-libdnssd-dev libjpeg-dev
 ```
 
 **on RPI you need the videocore IV headers**

assets/webconfig/js/content_grabber.js

@@ -27,7 +27,7 @@ $(document).ready( function() {
 		//v4l
 		$('#conf_cont').append(createRow('conf_cont_v4l'))
 		$('#conf_cont_v4l').append(createOptPanel('fa-camera', $.i18n("edt_conf_v4l2_heading_title"), 'editor_container_v4l2', 'btn_submit_v4l2'));
-		$('#conf_cont_v4l').append(createHelpTable(schema.grabberV4L2.items.properties, $.i18n("edt_conf_v4l2_heading_title")));
+		$('#conf_cont_v4l').append(createHelpTable(schema.grabberV4L2.properties, $.i18n("edt_conf_v4l2_heading_title")));
 	}
 	else
 	{

config/hyperion.config.json.commented

@@ -114,7 +114,6 @@
 	///  * sDHOffsetMax   		: area for signal detection - horizontal maximum offset value. Values between 0.0 and 1.0
 	///  * sDVOffsetMax			: area for signal detection - vertical maximum offset value. Values between 0.0 and 1.0
 	"grabberV4L2" :
-	[
 	{
 		"device"   : "auto",
 		"standard" : "NO_CHANGE",
@@ -132,8 +131,7 @@
 		"sDHOffsetMin" : 0.25,
 		"sDVOffsetMax"   : 0.75,
 		"sDHOffsetMax" : 0.75
-		}
-	],
+	},
 
 	///  The configuration for the frame-grabber, contains the following items:
 	///   * type         : type of grabber. (auto|osx|dispmanx|amlogic|x11|framebuffer|qt) [auto]

config/hyperion.config.json.default

@@ -57,7 +57,6 @@
 	},
 
 	"grabberV4L2" :
-	[
 	{
 		"device"   : "auto",
 		"standard" : "NO_CHANGE",
@@ -74,8 +73,7 @@
 		"sDHOffsetMin" : 0.25,
 		"sDVOffsetMax"   : 0.75,
 		"sDHOffsetMax" : 0.75
-		}
-	],
+	},
 
 	"framegrabber" :
 	{

include/grabber/V4L2Grabber.h

@@ -13,6 +13,13 @@
 #include <utils/PixelFormat.h>
 #include <hyperion/Grabber.h>
 #include <grabber/VideoStandard.h>
+#include <utils/Components.h>
+
+#ifdef HAVE_JPEG
+	#include <QImage>
+	#include <jpeglib.h>
+	#include <csetjmp>
+#endif
 
 /// Capture class for V4L2 devices
 ///
@@ -78,6 +85,8 @@ public slots:
 
 	void stop();
 
+	void componentStateChanged(const hyperion::Components component, bool enable);
+
 signals:
 	void newFrame(const Image<ColorRgb> & image);
 	void readError(const char* err);
@@ -111,7 +120,7 @@ private:
 
 	bool process_image(const void *p, int size);
 
-	void process_image(const uint8_t *p);
+	void process_image(const uint8_t *p, int size);
 
 	int xioctl(int request, void *arg);
 
@@ -120,17 +129,41 @@ private:
 	void throw_errno_exception(const QString &error);
 
 private:
-	enum io_method {
+	enum io_method
+	{
 			IO_METHOD_READ,
 			IO_METHOD_MMAP,
 			IO_METHOD_USERPTR
 	};
 
-	struct buffer {
+	struct buffer
+	{
 			void   *start;
 			size_t  length;
 	};
 
+#ifdef HAVE_JPEG
+	struct errorManager
+	{
+		jpeg_error_mgr pub;
+		jmp_buf setjmp_buffer;
+	};
+
+	static void errorHandler(j_common_ptr cInfo)
+	{
+		errorManager* mgr = reinterpret_cast<errorManager*>(cInfo->err);
+		longjmp(mgr->setjmp_buffer, 1);
+	}
+
+	static void outputHandler(j_common_ptr cInfo)
+	{
+		// Suppress fprintf warnings.
+	}
+
+	jpeg_decompress_struct* _decompress;
+	errorManager* _error;
+#endif
+
 private:
 	QString _deviceName;
 	std::map<QString,QString> _v4lDevices;
@@ -156,7 +189,7 @@ private:
 	double   _x_frac_max;
 	double   _y_frac_max;
 
-	QSocketNotifier * _streamNotifier;
+	QSocketNotifier *_streamNotifier;
 
 	bool _initialized;
 	bool _deviceAutoDiscoverEnabled;

include/utils/PixelFormat.h

@@ -12,6 +12,9 @@ enum PixelFormat {
 	PIXELFORMAT_BGR24,
 	PIXELFORMAT_RGB32,
 	PIXELFORMAT_BGR32,
+#ifdef HAVE_JPEG
+	PIXELFORMAT_MJPEG,
+#endif
 	PIXELFORMAT_NO_CHANGE
 };
 
@@ -44,6 +47,12 @@ inline PixelFormat parsePixelFormat(QString pixelFormat)
 	{
 		return PIXELFORMAT_BGR32;
 	}
+#ifdef HAVE_JPEG
+	else if (pixelFormat == "mjpeg")
+	{
+		return PIXELFORMAT_MJPEG;
+	}
+#endif
 
 	// return the default NO_CHANGE
 	return PIXELFORMAT_NO_CHANGE;

libsrc/grabber/v4l2/CMakeLists.txt

@@ -10,3 +10,7 @@ target_link_libraries(v4l2-grabber
 	hyperion
 	${QT_LIBRARIES}
 )
+
+if (JPEG_FOUND)
+	target_link_libraries(v4l2-grabber ${JPEG_LIBRARY})
+endif()

libsrc/grabber/v4l2/V4L2Grabber.cpp

@@ -16,11 +16,15 @@
 #include <sys/ioctl.h>
 #include <linux/videodev2.h>
 
+#include <hyperion/Hyperion.h>
+
 #include <QDirIterator>
 #include <QFileInfo>
 
 #include "grabber/V4L2Grabber.h"
 
+using namespace hyperion;
+
 #define CLEAR(x) memset(&(x), 0, sizeof(x))
 
 V4L2Grabber::V4L2Grabber(const QString & device
@@ -55,6 +59,10 @@ V4L2Grabber::V4L2Grabber(const QString & device
 	setPixelDecimation(pixelDecimation);
 	getV4Ldevices();
 
+	// listen for component change for build-in grabber only
+	if (Hyperion::_hyperion)
+		connect(Hyperion::getInstance(), &Hyperion::componentStateChanged, this, &V4L2Grabber::componentStateChanged);
+
 	// init
 	setDeviceVideoStandard(device, videoStandard);
 }
@@ -70,11 +78,7 @@ void V4L2Grabber::uninit()
 	if (_initialized)
 	{
 		Debug(_log,"uninit grabber: %s", QSTRING_CSTR(_deviceName));
-
 		stop();
-		uninit_device();
-		close_device();
-		_initialized = false;
 	}
 }
 
@@ -233,6 +237,9 @@ void V4L2Grabber::stop()
 	{
 		stop_capturing();
 		_streamNotifier->setEnabled(false);
+		uninit_device();
+		close_device();
+		_initialized = false;
 		Info(_log, "Stopped");
 	}
 }
@@ -527,63 +534,98 @@ void V4L2Grabber::init_device(VideoStandard videoStandard, int input)
 		case PIXELFORMAT_RGB32:
 			fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB32;
 		break;
+#ifdef HAVE_JPEG
+		case PIXELFORMAT_MJPEG:
+		{
+			fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
+			fmt.fmt.pix.field       = V4L2_FIELD_ANY;
+		}
+		break;
+#endif
 		case PIXELFORMAT_NO_CHANGE:
 		default:
 			// No change to device settings
 		break;
 	}
 
-// TODO Does never accept own sizes? use always _imageResampler instead
-/*
-
-	// calc the size based on pixelDecimation
-	fmt.fmt.pix.width = fmt.fmt.pix.width / _pixelDecimation;
-	fmt.fmt.pix.height = fmt.fmt.pix.height / _pixelDecimation;
-
 	// set the settings
+	fmt.fmt.pix.width = _width;
+	fmt.fmt.pix.height = _height;
+
 	if (-1 == xioctl(VIDIOC_S_FMT, &fmt))
 	{
 		throw_errno_exception("VIDIOC_S_FMT");
 		return;
 	}
 
-	// get the format settings again
-	// (the size may not have been accepted without an error)
-	if (-1 == xioctl(VIDIOC_G_FMT, &fmt))
-	{
-		throw_errno_exception("VIDIOC_G_FMT");
-		return;
-	}
-*/
-	// set the line length
-	_lineLength = fmt.fmt.pix.bytesperline;
-
-	// store width & height
+	// initialize current width and height
 	_width = fmt.fmt.pix.width;
 	_height = fmt.fmt.pix.height;
 
 	// display the used width and height
 	Debug(_log, "width=%d height=%d", _width, _height );
 
+	// Trying to set frame rate
+	struct v4l2_streamparm streamparms;
+	CLEAR(streamparms);
+	streamparms.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	if (-1 == xioctl(VIDIOC_G_PARM, &streamparms))
+	{
+		throw_errno_exception("VIDIOC_G_PARM");
+		// continue
+	}
+	else
+	{
+		// Check the capability flag is set to V4L2_CAP_TIMEPERFRAME
+		if (streamparms.parm.capture.capability == V4L2_CAP_TIMEPERFRAME)
+		{
+			// Driver supports the feature. Set required framerate
+			streamparms.parm.capture.capturemode = V4L2_MODE_HIGHQUALITY;
+			streamparms.parm.capture.timeperframe.numerator = 1;
+			streamparms.parm.capture.timeperframe.denominator = 30;
+			if(-1 == xioctl(VIDIOC_S_PARM, &streamparms))
+			{
+				throw_errno_exception("VIDIOC_S_PARM");
+				return;
+			}
+		}
+	}
+
+	// set the line length
+	_lineLength = fmt.fmt.pix.bytesperline;
 
 	// check pixel format and frame size
 	switch (fmt.fmt.pix.pixelformat)
 	{
 		case V4L2_PIX_FMT_UYVY:
+		{
 			_pixelFormat = PIXELFORMAT_UYVY;
 			_frameByteSize = _width * _height * 2;
 			Debug(_log, "Pixel format=UYVY");
+		}
 		break;
 		case V4L2_PIX_FMT_YUYV:
+		{
 			_pixelFormat = PIXELFORMAT_YUYV;
 			_frameByteSize = _width * _height * 2;
 			Debug(_log, "Pixel format=YUYV");
+		}
 		break;
 		case V4L2_PIX_FMT_RGB32:
+		{
 			_pixelFormat = PIXELFORMAT_RGB32;
 			_frameByteSize = _width * _height * 4;
 			Debug(_log, "Pixel format=RGB32");
+		}
 		break;
+#ifdef HAVE_JPEG
+		case V4L2_PIX_FMT_MJPEG:
+		{
+			_pixelFormat = PIXELFORMAT_MJPEG;
+			Debug(_log, "Pixel format=MJPEG");
+		}
+		break;
+#endif
 		default:
 			throw_exception("Only pixel formats UYVY, YUYV, and RGB32 are supported");
 		return;
@@ -714,7 +756,8 @@ int V4L2Grabber::read_frame()
 	{
 	struct v4l2_buffer buf;
 
-	switch (_ioMethod) {
+	switch (_ioMethod)
+	{
 		case IO_METHOD_READ:
 			int size;
 			if ((size = read(_fileDescriptor, _buffers[0].start, _buffers[0].length)) == -1)
@@ -828,22 +871,100 @@ int V4L2Grabber::read_frame()
 bool V4L2Grabber::process_image(const void *p, int size)
 {
 	// We do want a new frame...
+#ifdef HAVE_JPEG
+	if (size != _frameByteSize && _pixelFormat != PIXELFORMAT_MJPEG)
+#else
 	if (size != _frameByteSize)
+#endif
 	{
 		Error(_log, "Frame too small: %d != %d", size, _frameByteSize);
 	}
 	else
 	{
-		process_image(reinterpret_cast<const uint8_t *>(p));
+		process_image(reinterpret_cast<const uint8_t *>(p), size);
 		return true;
 	}
 
 	return false;
 }
 
-void V4L2Grabber::process_image(const uint8_t * data)
+void V4L2Grabber::process_image(const uint8_t * data, int size)
 {
-	Image<ColorRgb> image(0, 0);
+	Image<ColorRgb> image(_width, _height);
+
+#ifdef HAVE_JPEG
+	if (_pixelFormat == PIXELFORMAT_MJPEG)
+	{
+		_decompress = new jpeg_decompress_struct;
+		_error = new errorManager;
+
+		_decompress->err = jpeg_std_error(&_error->pub);
+		_error->pub.error_exit = &errorHandler;
+		_error->pub.output_message = &outputHandler;
+
+		jpeg_create_decompress(_decompress);
+
+		if (setjmp(_error->setjmp_buffer))
+		{
+			jpeg_abort_decompress(_decompress);
+			jpeg_destroy_decompress(_decompress);
+			delete _decompress;
+			delete _error;
+			return;
+		}
+
+		jpeg_mem_src(_decompress, const_cast<uint8_t*>(data), size);
+
+		if (jpeg_read_header(_decompress, (bool) TRUE) != JPEG_HEADER_OK)
+		{
+			jpeg_abort_decompress(_decompress);
+			jpeg_destroy_decompress(_decompress);
+			delete _decompress;
+			delete _error;
+			return;
+		}
+
+		jpeg_start_decompress(_decompress);
+
+		QImage imageFrame = QImage(_decompress->output_width, _decompress->output_height, QImage::Format_RGB888);
+
+		int y = 0;
+		while (_decompress->output_scanline < _decompress->output_height)
+		{
+			uchar *row = imageFrame.scanLine(_decompress->output_scanline);
+			jpeg_read_scanlines(_decompress, &row, 1);
+			y++;
+		}
+
+		jpeg_finish_decompress(_decompress);
+		jpeg_destroy_decompress(_decompress);
+		delete _decompress;
+		delete _error;
+
+		if (imageFrame.isNull())
+			return;
+
+		QRect rect(_cropLeft, _cropTop, imageFrame.width() - _cropLeft - _cropRight, imageFrame.height() - _cropTop - _cropBottom);
+		imageFrame = imageFrame.copy(rect);
+		imageFrame = imageFrame.scaled(imageFrame.width() / _pixelDecimation, imageFrame.height() / _pixelDecimation,Qt::KeepAspectRatio);
+
+		if ((image.width() != unsigned(imageFrame.width())) && (image.height() != unsigned(imageFrame.height())))
+			image.resize(imageFrame.width(), imageFrame.height());
+
+		for (int y=0; y<imageFrame.height(); ++y)
+		{
+			for (int x=0; x<imageFrame.width(); ++x)
+			{
+				const QRgb inPixel = imageFrame.pixel(x,y);
+				ColorRgb & outPixel = image(x,y);
+				outPixel.red   = (inPixel & 0xff0000) >> 16;
+				outPixel.green = (inPixel & 0xff00) >>  8;
+				outPixel.blue  = (inPixel & 0xff);
+			}
+		}
+	}
+	else
+#endif
 		_imageResampler.processImage(data, _width, _height, _lineLength, _pixelFormat, image);
 
 	if (_signalDetectionEnabled)
@@ -963,3 +1084,19 @@ void V4L2Grabber::setDeviceVideoStandard(QString device, VideoStandard videoStan
 			start();
 	}
 }
+
+void V4L2Grabber::componentStateChanged(const hyperion::Components component, bool enable)
+{
+	if (component == COMP_V4L)
+	{
+		if (_initialized != enable)
+		{
+			if (enable)
+			{
+				if(init()) start();
+			}
+			else
+				uninit();
+		}
+	}
+}

libsrc/hyperion/PriorityMuxer.cpp

@@ -294,7 +294,7 @@ void PriorityMuxer::setCurrentTime(void)
 		else
 		{
 			// timeoutTime of -100 is awaiting data (inactive); skip
-			if(infoIt->timeoutTime_ms >= -100)
+			if(infoIt->timeoutTime_ms > -100)
 				newPriority = qMin(newPriority, infoIt->priority);
 
 			// call timeTrigger when effect or color is running with timeout > 0, blacklist prio 255

libsrc/hyperion/schema/schema-grabberV4L2.json

@@ -1,11 +1,4 @@
 {
-	"type":"array",
-	"required" : true,
-	"title" : "edt_conf_v4l2_heading_title",
-	"minItems": 1,
-	"maxItems": 1,
-	"items":
-	{
 	"type" : "object",
 	"required" : true,
 	"title" : "edt_conf_v4l2_heading_title",
@@ -204,5 +197,4 @@
 		}
 	},
 	"additionalProperties" : false
-	}
 }

libsrc/utils/ImageResampler.cpp

@@ -121,6 +121,10 @@ void ImageResampler::processImage(const uint8_t * data, int width, int height, i
 					rgb.red   = data[index+2];
 				}
 				break;
+#ifdef HAVE_JPEG
+				case PIXELFORMAT_MJPEG:
+					break;
+#endif
 				case PIXELFORMAT_NO_CHANGE:
 					Error(Logger::getInstance("ImageResampler"), "Invalid pixel format given");
 				break;

src/hyperion-v4l2/hyperion-v4l2.cpp

@@ -60,7 +60,7 @@ int main(int argc, char** argv)
 
 		Option             & argDevice              = parser.add<Option>       ('d', "device", "The device to use, can be /dev/video0 [default: %1 (auto detected)]", "auto");
 		SwitchOption<VideoStandard> & argVideoStandard= parser.add<SwitchOption<VideoStandard>>('v', "video-standard", "The used video standard. Valid values are PAL, NTSC, SECAM or no-change. [default: %1]", "no-change");
-		SwitchOption<PixelFormat> & argPixelFormat    = parser.add<SwitchOption<PixelFormat>>  (0x0, "pixel-format", "The use pixel format. Valid values are YUYV, UYVY, RGB32 or no-change. [default: %1]", "no-change");
+		SwitchOption<PixelFormat> & argPixelFormat    = parser.add<SwitchOption<PixelFormat>>  (0x0, "pixel-format", "The use pixel format. Valid values are YUYV, UYVY, RGB32, MJPEG or no-change. [default: %1]", "no-change");
 		IntOption          & argCropWidth           = parser.add<IntOption>    (0x0, "crop-width", "Number of pixels to crop from the left and right sides of the picture before decimation [default: %1]", "0");
 		IntOption          & argCropHeight          = parser.add<IntOption>    (0x0, "crop-height", "Number of pixels to crop from the top and the bottom of the picture before decimation [default: %1]", "0");
 		IntOption          & argCropLeft            = parser.add<IntOption>    (0x0, "crop-left", "Number of pixels to crop from the left of the picture before decimation (overrides --crop-width)");
@@ -96,6 +96,9 @@ int main(int argc, char** argv)
 		argPixelFormat.addSwitch("yuyv", PIXELFORMAT_YUYV);
 		argPixelFormat.addSwitch("uyvy", PIXELFORMAT_UYVY);
 		argPixelFormat.addSwitch("rgb32", PIXELFORMAT_RGB32);
+#ifdef HAVE_JPEG
+		argPixelFormat.addSwitch("mjpeg", PIXELFORMAT_MJPEG);
+#endif
 		argPixelFormat.addSwitch("no-change", PIXELFORMAT_NO_CHANGE);
 
 		// parse all options
@@ -212,9 +215,11 @@ int main(int argc, char** argv)
 			// Connect the screen capturing to flatbuf connection processing
 			QObject::connect(&grabber, SIGNAL(newFrame(const Image<ColorRgb> &)), &flatbuf, SLOT(setImage(Image<ColorRgb>)));
 
-			if (grabber.start())
-				QCoreApplication::exec();
-			grabber.stop();
+			// Start the capturing
+			grabber.start();
+			
+			// Start the application
+			app.exec();
 		}
 	}
 	catch (const std::runtime_error & e)

src/hyperiond/hyperiond.cpp

@@ -57,7 +57,7 @@ HyperionDaemon::HyperionDaemon(QString configFile, const QString rootPath, QObje
 	, _webserver(nullptr)
 	, _jsonServer(nullptr)
 	, _udpListener(nullptr)
-	, _v4l2Grabbers()
+	, _v4l2Grabbers(nullptr)
 	, _dispmanx(nullptr)
 	, _x11Grabber(nullptr)
 	, _amlGrabber(nullptr)
@@ -162,14 +162,10 @@ void HyperionDaemon::freeObjects()
 	delete _fbGrabber;
 	delete _osxGrabber;
 	delete _qtGrabber;
-
-	for(V4L2Wrapper* grabber : _v4l2Grabbers)
-	{
-		delete grabber;
-	}
+	delete _v4l2Grabbers;
 	delete _stats;
 
-	_v4l2Grabbers.clear();
+	_v4l2Grabbers          = nullptr;
 	_bonjourBrowserWrapper = nullptr;
 	_amlGrabber            = nullptr;
 	_dispmanx              = nullptr;
@@ -386,19 +382,9 @@ void HyperionDaemon::handleSettingsUpdate(const settings::type& type, const QJso
 	}
 	else if(type == settings::V4L2)
 	{
-		// stop
-		if(_v4l2Grabbers.size()>0)
-			return;
 
-		unsigned v4lEnableCount = 0;
-
-		const QJsonArray & v4lArray = config.array();
-		for ( signed idx=0; idx<v4lArray.size(); idx++)
-		{
-			#ifdef ENABLE_V4L2
-
-			const QJsonObject & grabberConfig = v4lArray.at(idx).toObject();
-			bool enableV4l = grabberConfig["enable"].toBool(true);
+#ifdef ENABLE_V4L2
+			const QJsonObject & grabberConfig = config.object();
 
 			V4L2Wrapper* grabber = new V4L2Wrapper(
 				grabberConfig["device"].toString("auto"),
@@ -425,15 +411,9 @@ void HyperionDaemon::handleSettingsUpdate(const settings::type& type, const QJso
 			// connect to HyperionDaemon signal
 			connect(this, &HyperionDaemon::videoMode, grabber, &V4L2Wrapper::setVideoMode);
 			connect(this, &HyperionDaemon::settingsChanged, grabber, &V4L2Wrapper::handleSettingsUpdate);
-
-			if (enableV4l)
-				v4lEnableCount++;
-
-			_v4l2Grabbers.push_back(grabber);
-			#endif
-		}
-
-		ErrorIf( (v4lEnableCount>0 && _v4l2Grabbers.size()==0), _log, "The v4l2 grabber can not be instantiated, because it has been left out from the build");
+#else
+		Error(_log, "The v4l2 grabber can not be instantiated, because it has been left out from the build");
+#endif
 	}
 }
 
@@ -449,7 +429,7 @@ void HyperionDaemon::createGrabberDispmanx()
 
 	Info(_log, "DISPMANX frame grabber created");
 #else
-	Error( _log, "The dispmanx framegrabber can not be instantiated, because it has been left out from the build");
+	Error(_log, "The dispmanx framegrabber can not be instantiated, because it has been left out from the build");
 #endif
 }
 
@@ -466,7 +446,7 @@ void HyperionDaemon::createGrabberAmlogic()
 
 	Info(_log, "AMLOGIC grabber created");
 #else
-	Error( _log, "The AMLOGIC grabber can not be instantiated, because it has been left out from the build");
+	Error(_log, "The AMLOGIC grabber can not be instantiated, because it has been left out from the build");
 #endif
 }
 

src/hyperiond/hyperiond.h

@@ -137,7 +137,7 @@ private:
 	WebServer*                 _webserver;
 	JsonServer*                _jsonServer;
 	UDPListener*               _udpListener;
-	std::vector<V4L2Wrapper*>  _v4l2Grabbers;
+	V4L2Wrapper*               _v4l2Grabbers;
 	DispmanxWrapper*           _dispmanx;
 	X11Wrapper*                _x11Grabber;
 	AmlogicWrapper*            _amlGrabber;