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_rpi_pwm/LedDeviceWS281x.h

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <leddevice/LedDevice.h>
+#include <ws2811.h>
+
+///
+/// Implementation of the LedDevice interface for writing to Ws2812 led device via pwm.
+///
+class LedDeviceWS281x : public LedDevice
+{
+public:
+	///
+	/// Constructs specific LedDevice
+	///
+	/// @param deviceConfig json device config
+	///
+	LedDeviceWS281x(const QJsonObject &deviceConfig);
+
+	///
+	/// Destructor of the LedDevice, waits for DMA to complete and then cleans up
+	///
+	~LedDeviceWS281x();
+	
+	///
+	/// Sets configuration
+	///
+	/// @param deviceConfig the json device config
+	/// @return true if success
+	bool init(const QJsonObject &deviceConfig);
+
+	/// constructs leddevice
+	static LedDevice* construct(const QJsonObject &deviceConfig);
+
+private:
+	///
+	/// Writes the led color values to the led-device
+	///
+	/// @param ledValues The color-value per led
+	/// @return Zero on succes else negative
+	///
+	virtual int write(const std::vector<ColorRgb> &ledValues);
+
+	ws2811_t    _led_string;
+	int         _channel;
+	RGBW::WhiteAlgorithm _whiteAlgorithm;
+	ColorRgbw   _temp_rgbw;
+};