Leddevices source tree refactoring (#461)

* rework structure of leddevice source tree

* fix data type vor v4l sig detection value in webui

* automate leddevicefactory.cpp

libsrc/leddevice/dev_other/LedDeviceFile.h

@@ -0,0 +1,50 @@
+#pragma once
+
+// STL includes
+#include <fstream>
+
+// Leddevice includes
+#include <leddevice/LedDevice.h>
+
+///
+/// Implementation of the LedDevice that write the led-colors to an
+/// ASCII-textfile('/home/pi/LedDevice.out')
+///
+class LedDeviceFile : public LedDevice
+{
+public:
+	///
+	/// Constructs specific LedDevice
+	///
+	/// @param deviceConfig json device config
+	///
+	LedDeviceFile(const QJsonObject &deviceConfig);
+
+	///
+	/// Destructor of this test-device
+	///
+	virtual ~LedDeviceFile();
+
+	/// constructs leddevice
+	static LedDevice* construct(const QJsonObject &deviceConfig);
+
+	///
+	/// Sets configuration
+	///
+	/// @param deviceConfig the json device config
+	/// @return true if success
+	virtual bool init(const QJsonObject &deviceConfig);
+	
+protected:
+	///
+	/// Writes the given led-color values to the output stream
+	///
+	/// @param ledValues The color-value per led
+	///
+	/// @return Zero on success else negative
+	///
+	virtual int write(const std::vector<ColorRgb> & ledValues);
+
+	/// The outputstream
+	std::ofstream _ofs;
+};