extend effect engine with qt image effects (#249)

* - effects now can use qt image effects
- rainbow swirtl is now suitable for any led layout - including matrix

* fix rainbow effect

* effect: add radialGradient

* fix some js errors

* optimize code

* try fix travis test not working as expected

* fix default config files

* fix config

.travis.yml

@@ -22,6 +22,6 @@ before_install:
     - ./.travis/travis_install.sh
 script:
     - ./.travis/travis_build.sh
-after_success:
     - ./test/testrunner.sh
+after_success:
     - ./.travis/travis_deploy.sh

assets/webconfig/js/content_generalconf.js

@@ -23,20 +23,6 @@ $(hyperion).one("cmd-config-getschema", function(event) {
 	parsedConfSchemaJSON = event.response.result;
 
 	schema = parsedConfSchemaJSON.properties;
-	blackborderdetector = schema.blackborderdetector;
-	color = schema.color;
-	effects = schema.effects;
-	forwarder = schema.forwarder;
-	initialEffect = schema.initialEffect;
-	kodiVideoChecker = schema.kodiVideoChecker;
-	smoothing = schema.smoothing;
-	logger = schema.logger;
-	jsonServer = schema.jsonServer;
-	protoServer = schema.protoServer;
-	boblightServer = schema.boblightServer;
-	udpListener = schema.udpListener;
-	webConfig = schema.webConfig;
-
 	var element = document.getElementById('editor_container');
 
 	var general_conf_editor = new JSONEditor(element,{
@@ -50,19 +36,19 @@ $(hyperion).one("cmd-config-getschema", function(event) {
 		schema: {
 			title:'',
 			properties: {
-				blackborderdetector,
-				color,
-				effects,
-				forwarder,
-				initialEffect,
-				kodiVideoChecker,
-				smoothing,
-				logger,
-				jsonServer,
-				protoServer,
-				boblightServer,
-				udpListener,
-				webConfig
+				blackborderdetector: schema.blackborderdetector,
+				color              : schema.color,
+				effects            : schema.effects,
+				forwarder          : schema.forwarder,
+				initialEffect      : schema.initialEffect,
+				kodiVideoChecker   : schema.kodiVideoChecker,
+				smoothing          : schema.smoothing,
+				logger             : schema.logger,
+				jsonServer         : schema.jsonServer,
+				protoServer        : schema.protoServer,
+				boblightServer     : schema.boblightServer,
+				udpListener        : schema.udpListener,
+				webConfig          : schema.webConfig
 			}
 		}
 	});
@@ -80,7 +66,7 @@ $(hyperion).one("cmd-config-getschema", function(event) {
 // 	});
 
 	//Alternative Function with submit button to get Values
-	$('btn_submit').off().on('click',function() {
+	$('#btn_submit').off().on('click',function() {
 		console.log(general_conf_editor.getValue());
 	});
 

assets/webconfig/js/content_grabber.js

@@ -20,15 +20,14 @@ function removeAdvanced(obj,searchStack)
 }
 */
 
+var grabber_conf_editor = null;
 $(hyperion).one("cmd-config-getschema", function(event) {
 	parsedConfSchemaJSON = event.response.result;
 	schema = parsedConfSchemaJSON.properties;
-	schema_framegrabber = schema.framegrabber;
-	schema_grabberv4l2 = schema["grabber-v4l2"];
 
 	var element = document.getElementById('editor_container');
 	
-	var grabber_conf_editor = new JSONEditor(element,{
+	grabber_conf_editor = new JSONEditor(element,{
 		theme: 'bootstrap3',
 		iconlib: "fontawesome4",
 		disable_collapse: 'true',
@@ -39,8 +38,8 @@ $(hyperion).one("cmd-config-getschema", function(event) {
 		schema: {
 			title:'',
 			properties: {
-				schema_framegrabber,
-				schema_grabberv4l2,
+				framegrabber: schema.framegrabber,
+				grabberV4L2 : schema["grabberV4L2"]
 			}
 		}
 	});
@@ -59,7 +58,7 @@ $(document).ready( function() {
 
 	document.getElementById('btn_submit').addEventListener('click',function() {
 		// Get the value from the editor
-		//console.log(general_conf_editor.getValue());
+		console.log(grabber_conf_editor.getValue());
 	});
 //  $("[type='checkbox']").bootstrapSwitch();
 });

assets/webconfig/js/content_leds.js

@@ -153,8 +153,8 @@ $(document).ready(function() {
 			schema: {
 				title:' ',
 				properties: {
-					generalOptions,
-					specificOptions,
+					generalOptions : generalOptions,
+					specificOptions : specificOptions,
 				}
 			}
 		});

assets/webconfig/js/content_remote.js

@@ -96,6 +96,7 @@ $(document).ready(function() {
 
 			$('#cp2').colorpicker().on('changeColor', function(e) {
 				color = e.color.toRGB();
+				$("#effect_select").val("__none__");
 				requestSetColor(color.r, color.g, color.b);
 			});
 		});
@@ -106,7 +107,10 @@ $(document).ready(function() {
 			efx = $(this).val();
 			if(efx != "__none__")
 			{
-				requestPlayEffect(efx);
+				requestPriorityClear();
+				$(hyperion).one("cmd-clear", function(event) {
+					setTimeout(function() {requestPlayEffect(efx)}, 100);
+				});
 			}
 		});
 

config/hyperion.config.json.commented

@@ -168,7 +168,7 @@
 	///  * redSignalThreshold   : Signal threshold for the red channel between 0.0 and 1.0 [default=0.0]
 	///  * greenSignalThreshold : Signal threshold for the green channel between 0.0 and 1.0 [default=0.0]
 	///  * blueSignalThreshold  : Signal threshold for the blue channel between 0.0 and 1.0 [default=0.0]
-	"grabber-v4l2" :
+	"grabberV4L2" :
 	[
 		{
 			"enable"   : false,

config/hyperion.config.json.default

@@ -96,7 +96,7 @@
 		"continuousOutput" : true
 	},
 
-	"grabber-v4l2" :
+	"grabberV4L2" :
 	[
 		{
 			"enable"   : false,
@@ -194,7 +194,7 @@
 
 	"webConfig" :
 	{
-		"enable"        : true,
+		"enable"        : true
 	},
 
 	"effects" :

effects/rainbow-swirl-fast.json

@@ -3,8 +3,9 @@
 	"script" : "rainbow-swirl.py",
 	"args" :
 	{
-		"rotation-time" : 3.0,
-		"brightness" : 1.0,
+		"rotation-time" : 4.0,
+		"center_x" : 0.5,
+		"center_y" : 0.5,
 		"reverse" : false
 	}
 }

effects/rainbow-swirl.json

@@ -4,7 +4,8 @@
 	"args" :
 	{
 		"rotation-time" : 20.0,
-		"brightness" : 1.0,
+		"center_x" : 0.5,
+		"center_y" : 0.5,
 		"reverse" : false
 	}
 }

effects/rainbow-swirl.py

@@ -1,39 +1,37 @@
-import hyperion
-import time
-import colorsys
+import hyperion, time
 
 # Get the parameters
 rotationTime = float(hyperion.args.get('rotation-time', 3.0))
-brightness = float(hyperion.args.get('brightness', 1.0))
-saturation = float(hyperion.args.get('saturation', 1.0))
 reverse      = bool(hyperion.args.get('reverse', False))
+centerX      = float(hyperion.args.get('center_x', 0.5))
+centerY      = float(hyperion.args.get('center_y', 0.5))
 
-# Check parameters
-rotationTime = max(0.1, rotationTime)
-brightness = max(0.0, min(brightness, 1.0))
-saturation = max(0.0, min(saturation, 1.0))
+sleepTime = max(0.1, rotationTime) / 360
+angle     = 0
+centerX   = int(round(hyperion.imageWidth)*centerX)
+centerY   = int(round(float(hyperion.imageHeight)*centerY))
+increment = -1 if reverse else 1
 
-# Initialize the led data
-ledData = bytearray()
-for i in range(hyperion.ledCount):
-	hue = float(i)/hyperion.ledCount
-	rgb = colorsys.hsv_to_rgb(hue, saturation, brightness)
-	ledData += bytearray((int(255*rgb[0]), int(255*rgb[1]), int(255*rgb[2])))
+# table of stop colors for rainbow gradient, first is the position, next rgb, all values 0-255
+rainbowColors = bytearray([
+	0  ,255,0  ,0,
+	25 ,255,230,0,
+	63 ,255,255,0,
+	100,0  ,255,0,
+	127,0  ,255,200,
+	159,0  ,255,255,
+	191,0  ,0  ,255,
+	224,255,0  ,255,
+	255,255,0  ,127,
+])
 
-# Calculate the sleep time and rotation increment
-increment = 3
-sleepTime = rotationTime / hyperion.ledCount
-while sleepTime < 0.05:
-	increment *= 2
-	sleepTime *= 2
-increment %= hyperion.ledCount
-
-# Switch direction if needed
-if reverse:
-	increment = -increment
-	
-# Start the write data loop
+# effect loop
 while not hyperion.abort():
-	hyperion.setColor(ledData)
-	ledData = ledData[-increment:] + ledData[:-increment]
+	angle += increment
+	if angle > 360: angle=0
+	if angle <   0: angle=360
+
+	hyperion.imageCanonicalGradient(centerX, centerY, angle, rainbowColors)
+
+	hyperion.imageShow()
 	time.sleep(sleepTime)

include/hyperion/Hyperion.h

@@ -7,6 +7,7 @@
 // QT includes
 #include <QObject>
 #include <QTimer>
+#include <QSize>
 
 // hyperion-utils includes
 #include <utils/Image.h>
@@ -86,6 +87,8 @@ public:
 	///
 	unsigned getLedCount() const;
 
+	QSize getLedGridSize() const { return _ledGridSize; }
+
 	///
 	/// Returns the current priority
 	///
@@ -292,6 +295,7 @@ public:
 
 	static LinearColorSmoothing * createColorSmoothing(const Json::Value & smoothingConfig, LedDevice* leddevice);
 	static MessageForwarder * createMessageForwarder(const Json::Value & forwarderConfig);
+	static QSize getLedLayoutGridSize(const Json::Value& ledsConfig);
 
 signals:
 	/// Signal which is emitted when a priority channel is actively cleared
@@ -390,4 +394,6 @@ private:
 	int _currentSourcePriority;
 
 	QByteArray _configHash;
+
+	QSize _ledGridSize;
 };

libsrc/effectengine/CMakeLists.txt

@@ -48,6 +48,8 @@ add_library(effectengine
 	${EffectEngineSOURCES}
 )
 
+qt5_use_modules(effectengine Core Gui)
+
 target_link_libraries(effectengine
 	hyperion
 	jsoncpp

libsrc/effectengine/Effect.cpp

@@ -8,16 +8,27 @@
 // Qt includes
 #include <QDateTime>
 #include <QFile>
+#include <Qt>
+#include <QLinearGradient>
+#include <QConicalGradient>
+#include <QRadialGradient>
+#include <QRect>
 
 // effect engin eincludes
 #include "Effect.h"
 #include <utils/Logger.h>
+#include <hyperion/Hyperion.h>
 
 // Python method table
 PyMethodDef Effect::effectMethods[] = {
 	{"setColor",     Effect::wrapSetColor,    METH_VARARGS, "Set a new color for the leds."},
 	{"setImage",     Effect::wrapSetImage,    METH_VARARGS, "Set a new image to process and determine new led colors."},
 	{"abort",        Effect::wrapAbort,       METH_NOARGS,  "Check if the effect should abort execution."},
+	{"imageShow",    Effect::wrapImageShow,   METH_NOARGS,  "set current effect image to hyperion core."},
+	{"imageCanonicalGradient", Effect::wrapImageCanonicalGradient, METH_VARARGS,  ""},
+	{"imageRadialGradient"   , Effect::wrapImageRadialGradient,    METH_VARARGS,  ""},
+// 	{"imageSetPixel",Effect::wrapImageShow,   METH_VARARGS, "set pixel color of image"},
+// 	{"imageGetPixel",Effect::wrapImageShow,   METH_VARARGS, "get pixel color of image"},
 	{NULL, NULL, 0, NULL}
 };
 
@@ -70,6 +81,12 @@ Effect::Effect(PyThreadState * mainThreadState, int priority, int timeout, const
 	// disable the black border detector for effects
 	_imageProcessor->enableBlackBorderDetector(false);
 	
+	// init effect image for image based effects, size is based on led layout
+	_imageSize = Hyperion::getInstance()->getLedGridSize();
+	_image = new QImage(_imageSize, QImage::Format_ARGB32_Premultiplied);
+	_image->fill(Qt::black);
+	_painter = new QPainter(_image);
+
 	// connect the finished signal
 	connect(this, SIGNAL(finished()), this, SLOT(effectFinished()));
 	Q_INIT_RESOURCE(EffectEngine);
@@ -77,6 +94,8 @@ Effect::Effect(PyThreadState * mainThreadState, int priority, int timeout, const
 
 Effect::~Effect()
 {
+	delete _painter;
+	delete _image;
 }
 
 void Effect::run()
@@ -96,6 +115,12 @@ void Effect::run()
 	// add ledCount variable to the interpreter
 	PyObject_SetAttrString(module, "ledCount", Py_BuildValue("i", _imageProcessor->getLedCount()));
 
+	// add imageWidth variable to the interpreter
+	PyObject_SetAttrString(module, "imageWidth", Py_BuildValue("i", _imageSize.width()));
+
+	// add imageHeight variable to the interpreter
+	PyObject_SetAttrString(module, "imageHeight", Py_BuildValue("i", _imageSize.height()));
+
 	// add a args variable to the interpreter
 	PyObject_SetAttrString(module, "args", json2python(_args));
 
@@ -357,6 +382,207 @@ PyObject* Effect::wrapAbort(PyObject *self, PyObject *)
 	return Py_BuildValue("i", effect->_abortRequested ? 1 : 0);
 }
 
+
+PyObject* Effect::wrapImageShow(PyObject *self, PyObject *args)
+{
+	Effect * effect = getEffect();
+
+	// determine the timeout
+	int timeout = effect->_timeout;
+	if (timeout > 0)
+	{
+		timeout = effect->_endTime - QDateTime::currentMSecsSinceEpoch();
+
+		// we are done if the time has passed
+		if (timeout <= 0)
+		{
+			return Py_BuildValue("");
+		}
+	}
+
+	int width = effect->_imageSize.width();
+	int height = effect->_imageSize.height();
+	QImage * qimage = effect->_image;
+	
+	Image<ColorRgb> image(width, height);
+	QByteArray binaryImage;
+
+	for (int i = 0; i <qimage->height(); ++i)
+	{
+		const QRgb * scanline = reinterpret_cast<const QRgb *>(qimage->scanLine(i));
+		for (int j = 0; j < qimage->width(); ++j)
+		{
+			binaryImage.append((char) qRed(scanline[j]));
+			binaryImage.append((char) qGreen(scanline[j]));
+			binaryImage.append((char) qBlue(scanline[j]));
+		}
+	}
+	
+	memcpy(image.memptr(), binaryImage.data(), binaryImage.size());
+	effect->_imageProcessor->process(image, effect->_colors);
+	effect->setColors(effect->_priority, effect->_colors, timeout, false);
+
+	return Py_BuildValue("");
+}
+
+
+PyObject* Effect::wrapImageCanonicalGradient(PyObject *self, PyObject *args)
+{
+	Effect * effect = getEffect();
+
+	int argCount = PyTuple_Size(args);
+	PyObject * bytearray = nullptr;
+	int centerX, centerY, angle;
+	int startX = 0;
+	int startY = 0;
+	int width  = effect->_imageSize.width();
+	int height = effect->_imageSize.height();
+
+	bool argsOK = false;
+
+	if ( argCount == 8 && PyArg_ParseTuple(args, "iiiiiiiO", &startX, &startY, &width, &height, &centerX, &centerY, &angle, &bytearray) )
+	{
+		argsOK      = true;
+	}
+	if ( argCount == 4 && PyArg_ParseTuple(args, "iiiO", &centerX, &centerY, &angle, &bytearray) )
+	{
+		argsOK      = true;
+	}
+	angle = std::max(std::min(angle,360),0);
+
+	if (argsOK)
+	{
+		if (PyByteArray_Check(bytearray))
+		{
+			int length = PyByteArray_Size(bytearray);
+			if (length % 4 == 0)
+			{
+
+				QPainter * painter = effect->_painter;
+				QRect myQRect(startX,startY,width,height);
+				QConicalGradient gradient(QPoint(centerX,centerY), angle );
+				char * data = PyByteArray_AS_STRING(bytearray);
+
+				for (int idx=0; idx<length; idx+=4)
+				{
+					gradient.setColorAt(
+						((uint8_t)data[idx])/255.0,
+						QColor(
+							(uint8_t)(data[idx+1]),
+							(uint8_t)(data[idx+2]),
+							(uint8_t)(data[idx+3])
+					));
+				}
+
+				gradient.setSpread(QGradient::RepeatSpread);
+				painter->fillRect(myQRect, gradient);
+				
+				return Py_BuildValue("");
+			}
+			else
+			{
+				PyErr_SetString(PyExc_RuntimeError, "Length of bytearray argument should multiple of 4");
+				return nullptr;
+			}
+		}
+		else
+		{
+			PyErr_SetString(PyExc_RuntimeError, "Argument 8 is not a bytearray");
+			return nullptr;
+		}
+	}
+	else
+	{
+		return nullptr;
+	}
+}
+
+
+PyObject* Effect::wrapImageRadialGradient(PyObject *self, PyObject *args)
+{
+	Effect * effect = getEffect();
+
+	int argCount = PyTuple_Size(args);
+	PyObject * bytearray = nullptr;
+	int centerX, centerY, radius, focalX, focalY, focalRadius;
+	int startX = 0;
+	int startY = 0;
+	int width  = effect->_imageSize.width();
+	int height = effect->_imageSize.height();
+
+	bool argsOK = false;
+	
+	if ( argCount == 11 && PyArg_ParseTuple(args, "iiiiiiiiiiO", &startX, &startY, &width, &height, &centerX, &centerY, &radius, &focalX, &focalY, &focalRadius, &bytearray) )
+	{
+		argsOK      = true;
+	}
+	if ( argCount ==  8 && PyArg_ParseTuple(args, "iiiiiiiO", &startX, &startY, &width, &height, &centerX, &centerY, &radius, &bytearray) )
+	{
+		argsOK      = true;
+		focalX      = centerX;
+		focalY      = centerY;
+		focalRadius = radius;
+	}
+	if ( argCount ==  7 && PyArg_ParseTuple(args, "iiiiiiO", &centerX, &centerY, &radius, &focalX, &focalY, &focalRadius, &bytearray) )
+	{
+		argsOK      = true;
+	}
+	if ( argCount ==  4 && PyArg_ParseTuple(args, "iiiO", &centerX, &centerY, &radius, &bytearray) )
+	{
+		argsOK      = true;
+		focalX      = centerX;
+		focalY      = centerY;
+		focalRadius = radius;
+	}
+		
+	if (argsOK)
+	{
+		if (PyByteArray_Check(bytearray))
+		{
+			int length = PyByteArray_Size(bytearray);
+			if (length % 4 == 0)
+			{
+
+				QPainter * painter = effect->_painter;
+				QRect myQRect(startX,startY,width,height);
+				QRadialGradient gradient(QPoint(centerX,centerY), std::max(radius,0) );
+				char * data = PyByteArray_AS_STRING(bytearray);
+
+				for (int idx=0; idx<length; idx+=4)
+				{
+					gradient.setColorAt(
+						((uint8_t)data[idx])/255.0,
+						QColor(
+							(uint8_t)(data[idx+1]),
+							(uint8_t)(data[idx+2]),
+							(uint8_t)(data[idx+3])
+					));
+				}
+
+				//gradient.setSpread(QGradient::ReflectSpread);
+				painter->fillRect(myQRect, gradient);
+				
+				return Py_BuildValue("");
+			}
+			else
+			{
+				PyErr_SetString(PyExc_RuntimeError, "Length of bytearray argument should multiple of 4");
+				return nullptr;
+			}
+		}
+		else
+		{
+			PyErr_SetString(PyExc_RuntimeError, "Last argument is not a bytearray");
+			return nullptr;
+		}
+	}
+	else
+	{
+		return nullptr;
+	}
+}
+
+
 Effect * Effect::getEffect()
 {
 	// extract the module from the runtime

libsrc/effectengine/Effect.h

@@ -5,6 +5,9 @@
 
 // Qt includes
 #include <QThread>
+#include <QSize>
+#include <QImage>
+#include <QPainter>
 
 // Hyperion includes
 #include <hyperion/ImageProcessor.h>
@@ -52,6 +55,10 @@ private:
 	static PyObject* wrapSetColor(PyObject *self, PyObject *args);
 	static PyObject* wrapSetImage(PyObject *self, PyObject *args);
 	static PyObject* wrapAbort(PyObject *self, PyObject *args);
+	static PyObject* wrapImageShow(PyObject *self, PyObject *args);
+	static PyObject* wrapImageCanonicalGradient(PyObject *self, PyObject *args);
+	static PyObject* wrapImageRadialGradient(PyObject *self, PyObject *args);
+	
 	static Effect * getEffect();
 
 #if PY_MAJOR_VERSION >= 3
@@ -84,5 +91,10 @@ private:
 
 	/// Buffer for colorData
 	std::vector<ColorRgb> _colors;
+	
+	QSize _imageSize;
+	
+	QImage * _image;
+	QPainter * _painter;
 };
 	

libsrc/hyperion/Hyperion.cpp

@@ -423,6 +423,7 @@ LedString Hyperion::createLedString(const Json::Value& ledsConfig, const ColorOr
 	LedString ledString;
 	const std::string deviceOrderStr = colorOrderToString(deviceOrder);
 	int maxLedId = ledsConfig.size();
+
 	for (const Json::Value& ledConfig : ledsConfig)
 	{
 		Led led;
@@ -499,6 +500,51 @@ LedString Hyperion::createLedStringClone(const Json::Value& ledsConfig, const Co
 	return ledString;
 }
 
+QSize Hyperion::getLedLayoutGridSize(const Json::Value& ledsConfig)
+{
+	std::vector<int> midPointsX;
+	std::vector<int> midPointsY;
+
+	for (const Json::Value& ledConfig : ledsConfig)
+	{
+		if ( ledConfig.get("clone",-1).asInt() < 0 )
+		{
+			const Json::Value& hscanConfig = ledConfig["hscan"];
+			const Json::Value& vscanConfig = ledConfig["vscan"];
+			double minX_frac = std::max(0.0, std::min(1.0, hscanConfig["minimum"].asDouble()));
+			double maxX_frac = std::max(0.0, std::min(1.0, hscanConfig["maximum"].asDouble()));
+			double minY_frac = std::max(0.0, std::min(1.0, vscanConfig["minimum"].asDouble()));
+			double maxY_frac = std::max(0.0, std::min(1.0, vscanConfig["maximum"].asDouble()));
+			// Fix if the user swapped min and max
+			if (minX_frac > maxX_frac)
+			{
+				std::swap(minX_frac, maxX_frac);
+			}
+			if (minY_frac > maxY_frac)
+			{
+				std::swap(minY_frac, maxY_frac);
+			}
+
+			// calculate mid point and make grid calculation
+			midPointsX.push_back( int(1000.0*(minX_frac + maxX_frac) / 2.0) );
+			midPointsY.push_back( int(1000.0*(minY_frac + maxY_frac) / 2.0) );
+		}
+	}
+
+	// remove duplicates
+	std::sort(midPointsX.begin(), midPointsX.end());
+	midPointsX.erase(std::unique(midPointsX.begin(), midPointsX.end()), midPointsX.end());
+	std::sort(midPointsY.begin(), midPointsY.end());
+	midPointsY.erase(std::unique(midPointsY.begin(), midPointsY.end()), midPointsY.end());
+
+	QSize gridSize( midPointsX.size(), midPointsY.size() );
+	Debug(Logger::getInstance("Core"), "led layout grid: %dx%d", gridSize.width(), gridSize.height());
+
+	return gridSize;
+}
+
+
+
 LinearColorSmoothing * Hyperion::createColorSmoothing(const Json::Value & smoothingConfig, LedDevice* leddevice)
 {
 	Logger * log = Logger::getInstance("Core");
@@ -578,6 +624,7 @@ Hyperion::Hyperion(const Json::Value &jsonConfig, const std::string configFile)
 	, _hwLedCount(_ledString.leds().size())
 	, _sourceAutoSelectEnabled(true)
 	, _configHash()
+	, _ledGridSize(getLedLayoutGridSize(jsonConfig["leds"]))
 {
 	registerPriority("Off", PriorityMuxer::LOWEST_PRIORITY);
 	

libsrc/hyperion/hyperion.schema.json

@@ -432,7 +432,7 @@
 			},
 			"additionalProperties" : false
 		},
-		"grabber-v4l2" :
+		"grabberV4L2" :
 		{
 			"type":"array",
 			"title" : "USB Grabber",

src/hyperiond/hyperiond.cpp

@@ -548,13 +548,13 @@ void HyperionDaemon::createGrabberOsx(const QJsonObject & grabberConfig)
 void HyperionDaemon::createGrabberV4L2()
 {
 	// construct and start the v4l2 grabber if the configuration is present
-	bool v4lConfigured = _qconfig.contains("grabber-v4l2");
+	bool v4lConfigured = _qconfig.contains("grabberV4L2");
 	bool v4lStarted = false;
 	unsigned v4lEnableCount = 0;
 	
-	if (_qconfig["grabber-v4l2"].isArray())
+	if (_qconfig["grabberV4L2"].isArray())
 	{
-		const QJsonArray & v4lArray = _qconfig["grabber-v4l2"].toArray();
+		const QJsonArray & v4lArray = _qconfig["grabberV4L2"].toArray();
 		for ( signed idx=0; idx<v4lArray.size(); idx++)
 		{
 			const QJsonObject & grabberConfig = v4lArray.at(idx).toObject();