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/LedDeviceLpd6803.cpp

@@ -0,0 +1,38 @@
+#include "LedDeviceLpd6803.h"
+
+LedDeviceLpd6803::LedDeviceLpd6803(const QJsonObject &deviceConfig)
+	: ProviderSpi()
+{
+	_deviceReady = init(deviceConfig);
+}
+
+LedDevice* LedDeviceLpd6803::construct(const QJsonObject &deviceConfig)
+{
+	return new LedDeviceLpd6803(deviceConfig);
+}
+
+bool LedDeviceLpd6803::init(const QJsonObject &deviceConfig)
+{
+	ProviderSpi::init(deviceConfig);
+
+	unsigned messageLength = 4 + 2*_ledCount + _ledCount/8 + 1;
+	// Initialise the buffer
+	_ledBuffer.resize(messageLength, 0x00);
+	
+	return true;
+}
+
+int LedDeviceLpd6803::write(const std::vector<ColorRgb> &ledValues)
+{
+	// Copy the colors from the ColorRgb vector to the Ldp6803 data vector
+	for (unsigned iLed=0; iLed<(unsigned)_ledCount; ++iLed)
+	{
+		const ColorRgb& color = ledValues[iLed];
+
+		_ledBuffer[4 + 2 * iLed] = 0x80 | ((color.red & 0xf8) >> 1) | (color.green >> 6);
+		_ledBuffer[5 + 2 * iLed] = ((color.green & 0x38) << 2) | (color.blue >> 3);
+	}
+
+	// Write the data
+	return writeBytes(_ledBuffer.size(), _ledBuffer.data());
+}