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_spi/ProviderSpi.h

@@ -0,0 +1,68 @@
+#pragma once
+
+// Linux-SPI includes
+#include <linux/spi/spidev.h>
+
+// Hyperion includes
+#include <leddevice/LedDevice.h>
+
+///
+/// The ProviderSpi implements an abstract base-class for LedDevices using the SPI-device.
+///
+class ProviderSpi : public LedDevice
+{
+public:
+	///
+	/// Constructs specific LedDevice
+	///
+	ProviderSpi();
+
+	///
+	/// Sets configuration
+	///
+	/// @param deviceConfig the json device config
+	/// @return true if success
+	virtual bool init(const QJsonObject &deviceConfig);
+
+	///
+	/// Destructor of the LedDevice; closes the output device if it is open
+	///
+	virtual ~ProviderSpi();
+
+	///
+	/// Opens and configures the output device
+	///
+	/// @return Zero on succes else negative
+	///
+	int open();
+
+protected:
+	///
+	/// Writes the given bytes/bits to the SPI-device and sleeps the latch time to ensure that the
+	/// values are latched.
+	///
+	/// @param[in[ size The length of the data
+	/// @param[in] data The data
+	///
+	/// @return Zero on succes else negative
+	///
+	int writeBytes(const unsigned size, const uint8_t *data);
+
+	/// The name of the output device
+	QString _deviceName;
+
+	/// The used baudrate of the output device
+	int _baudRate_Hz;
+
+	/// The File Identifier of the opened output device (or -1 if not opened)
+	int _fid;
+
+	/// which spi clock mode do we use? (0..3)
+	int _spiMode;
+
+	/// 1=>invert the data pattern
+	bool _spiDataInvert;
+
+	/// The transfer structure for writing to the spi-device
+	spi_ioc_transfer _spi;
+};