implement use of multiple v4l devices.

Not all v4l devices are compat with that or must be attaches to different usb controllers

config/hyperion.config.json.commented

@@ -168,11 +168,12 @@
 	///  * 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" :
+	[
 		{
 			"enable"   : false,
-		"device"               : "/dev/video0",
+			"device"   : "auto",
 			"input"    : 0,
-		"standard"             : "no-change",
+			"standard" : "PAL",
 			"width"    : -1,
 			"height"   : -1,
 			"frameDecimation" : 2,
@@ -186,7 +187,8 @@
 			"redSignalThreshold"   : 0.0,
 			"greenSignalThreshold" : 0.0,
 			"blueSignalThreshold"  : 0.0
-	},
+		}
+	]
 
 	///  The configuration for the frame-grabber, contains the following items: 
 	///   * enable       : true if the framegrabber (platform grabber) should be activated

config/hyperion.config.json.default

@@ -97,6 +97,7 @@
 	},
 
 	"grabber-v4l2" :
+	[
 		{
 			"enable"   : false,
 			"device"   : "auto",
@@ -115,7 +116,8 @@
 			"redSignalThreshold"   : 0.0,
 			"greenSignalThreshold" : 0.0,
 			"blueSignalThreshold"  : 0.0
-	},
+		}
+	]
 
 	"framegrabber" :
 	{

libsrc/grabber/v4l2/V4L2Grabber.cpp

@@ -50,7 +50,7 @@ V4L2Grabber::V4L2Grabber(const std::string & device,
 	, _noSignalCounter(0)
 	, _streamNotifier(nullptr)
 	, _imageResampler()
-	, _log(Logger::getInstance("V4L2"))
+	, _log(Logger::getInstance("V4L2:"+device))
 	, _initialized(false)
 	, _deviceAutoDiscoverEnabled(false)
 {

libsrc/grabber/v4l2/V4L2Wrapper.cpp

@@ -16,7 +16,7 @@ V4L2Wrapper::V4L2Wrapper(const std::string &device,
 		double greenSignalThreshold,
 		double blueSignalThreshold,
 		const int priority)
-	: GrabberWrapper("V4L2", priority)
+	: GrabberWrapper("V4L2:"+device, priority)
 	, _timeout_ms(1000)
 	, _grabber(device,
 			input,

libsrc/hyperion/hyperion.schema.json

@@ -398,6 +398,9 @@
 			"additionalProperties" : false
 		},
 		"grabber-v4l2" :
+		{
+			"type":"array",
+			"items":
 			{
 				"type" : "object",
 				"properties" :
@@ -476,6 +479,7 @@
 					}
 				},
 			"additionalProperties" : false
+			}
 		},
 		"framegrabber" :
 		{

src/hyperiond/hyperiond.cpp

@@ -41,7 +41,7 @@ HyperionDaemon::HyperionDaemon(QString configFile, QObject *parent)
 	, _protoServer(nullptr)
 	, _boblightServer(nullptr)
 	, _udpListener(nullptr)
-	, _v4l2Grabber(nullptr)
+	, _v4l2Grabbers()
 	, _dispmanx(nullptr)
 #ifdef ENABLE_X11
 	, _x11Grabber(nullptr)
@@ -83,7 +83,10 @@ HyperionDaemon::~HyperionDaemon()
 	delete _dispmanx;
 	delete _fbGrabber;
 	delete _osxGrabber;
-	delete _v4l2Grabber;
+	for(V4L2Wrapper* grabber : _v4l2Grabbers)
+	{
+		delete grabber;
+	}
 	delete _kodiVideoChecker;
 	delete _jsonServer;
 	delete _protoServer;
@@ -538,11 +541,21 @@ void HyperionDaemon::createGrabberV4L2()
 {
 	// construct and start the v4l2 grabber if the configuration is present
 	bool v4lConfigured = _qconfig.contains("grabber-v4l2");
-	const QJsonObject & grabberConfig = _qconfig["grabber-v4l2"].toObject();
+	unsigned v4lEnableCount = 0;
-	bool enableV4l = v4lConfigured && grabberConfig["enable"].toBool(true);
 	
+	if (_qconfig["grabber-v4l2"].isArray())
+	{
+		const QJsonArray & v4lArray = _qconfig["grabber-v4l2"].toArray();
+		for ( signed idx=0; idx<v4lArray.size(); idx++)
+		{
+			const QJsonObject & grabberConfig = v4lArray.at(idx).toObject();
+			bool enableV4l = v4lConfigured && grabberConfig["enable"].toBool(true);
+			if (enableV4l)
+			{
+				v4lEnableCount++;
+			}
 			#ifdef ENABLE_V4L2
-	_v4l2Grabber = new V4L2Wrapper(
+			V4L2Wrapper* grabber = new V4L2Wrapper(
 				grabberConfig["device"].toString("auto").toStdString(),
 				grabberConfig["input"].toInt(0),
 				parseVideoStandard(grabberConfig["standard"].toString("no-change").toStdString()),
@@ -555,22 +568,25 @@ void HyperionDaemon::createGrabberV4L2()
 				grabberConfig["greenSignalThreshold"].toDouble(0.0),
 				grabberConfig["blueSignalThreshold"].toDouble(0.0),
 				grabberConfig["priority"].toInt(890));
-	_v4l2Grabber->set3D(parse3DMode(grabberConfig["mode"].toString("2D").toStdString()));
+			grabber->set3D(parse3DMode(grabberConfig["mode"].toString("2D").toStdString()));
-	_v4l2Grabber->setCropping(
+			grabber->setCropping(
 				grabberConfig["cropLeft"].toInt(0),
 				grabberConfig["cropRight"].toInt(0),
 				grabberConfig["cropTop"].toInt(0),
 				grabberConfig["cropBottom"].toInt(0));
 			Debug(_log, "V4L2 grabber created");
 
-	QObject::connect(_v4l2Grabber, SIGNAL(emitImage(int, const Image<ColorRgb>&, const int)), _protoServer, SLOT(sendImageToProtoSlaves(int, const Image<ColorRgb>&, const int)));
+			QObject::connect(grabber, SIGNAL(emitImage(int, const Image<ColorRgb>&, const int)), _protoServer, SLOT(sendImageToProtoSlaves(int, const Image<ColorRgb>&, const int)));
 			if (grabberConfig["useKodiChecker"].toBool(false))
 			{
-		QObject::connect(_kodiVideoChecker, SIGNAL(grabbingMode(GrabbingMode)), _v4l2Grabber, SLOT(setGrabbingMode(GrabbingMode)));
+				QObject::connect(_kodiVideoChecker, SIGNAL(grabbingMode(GrabbingMode)), grabber, SLOT(setGrabbingMode(GrabbingMode)));
 			}
-	InfoIf( enableV4l && _v4l2Grabber->start(), _log, "V4L2 grabber started");
+			InfoIf( enableV4l && grabber->start(), _log, "V4L2 grabber started");
+			_v4l2Grabbers.push_back(grabber);
 			#endif
+		}
+	}
 
-	ErrorIf(enableV4l && _v4l2Grabber==nullptr, _log, "The v4l2 grabber can not be instantiated, because it has been left out from the build");
+	ErrorIf( (v4lEnableCount>0 && _v4l2Grabbers.size()==0), _log, "The v4l2 grabber can not be instantiated, because it has been left out from the build");
 
 }

src/hyperiond/hyperiond.h

@@ -79,7 +79,7 @@ private:
 	ProtoServer*        _protoServer;
 	BoblightServer*     _boblightServer;
 	UDPListener*        _udpListener;
-	V4L2Wrapper*        _v4l2Grabber;
+	std::vector<V4L2Wrapper*>  _v4l2Grabbers;
 	DispmanxWrapper*    _dispmanx;
 #ifdef ENABLE_X11
 	X11Wrapper*         _x11Grabber;