Initial commit of support for the Philips Hue system.

Former-commit-id: 5b7d802c326151ee96a5b950badb01e94adfe7f3

libsrc/leddevice/LedDevicePhilipsHue.h

@@ -0,0 +1,90 @@
+#pragma once
+
+// STL includes
+#include <string>
+
+// Qt includes
+#include <QString>
+#include <QHttp>
+
+// Leddevice includes
+#include <leddevice/LedDevice.h>
+		
+/**
+ * Implementation for the Philips Hue system.
+ * 
+ * To use set the device to "philipshue".
+ * Uses the official Philips Hue API (http://developers.meethue.com).
+ * Framegrabber should be limited to 30 Hz / numer of lights to avoid rate limitation by the hue bridge.
+ * Create a new API user name "newdeveloper" on the bridge (http://developers.meethue.com/gettingstarted.html)
+ */
+class LedDevicePhilipsHue : public LedDevice
+{
+public:
+	///
+	/// Constructs the device.
+	///
+	/// @param output the ip address of the bridge
+	///
+	LedDevicePhilipsHue(const std::string& output);
+
+	///
+	/// Destructor of this device
+	///
+	virtual ~LedDevicePhilipsHue();
+
+	///
+	/// Sends the given led-color values via put request to the hue system
+	///
+	/// @param ledValues The color-value per led
+	///
+	/// @return Zero on success else negative
+	///
+	virtual int write(const std::vector<ColorRgb> & ledValues);
+
+	/// Switch the leds off
+	virtual int switchOff();
+
+private:
+	/// Ip address of the bridge
+	QString host;
+	/// User name for the API ("newdeveloper")
+	QString username;
+	QHttp* http;
+
+	///
+	/// Sends a HTTP PUT request
+	///
+	/// @param route the URI of the request
+	///
+	/// @param content content of the request
+	///
+	void put(QString route, QString content);
+
+	///
+	/// @param lightId the id of the hue light (starting from 1)
+	///
+	/// @return the URI of the light
+	///
+	QString getRoute(unsigned int lightId);
+
+	///
+	/// Converts an RGB color to the Hue xy color space and brightness
+	/// https://github.com/PhilipsHue/PhilipsHueSDK-iOS-OSX/blob/master/ApplicationDesignNotes/RGB%20to%20xy%20Color%20conversion.md
+	///
+	/// @param red the red component in [0, 1]
+	///
+	/// @param green the green component in [0, 1]
+	///
+	/// @param blue the blue component in [0, 1]
+	///
+	/// @param x converted x component
+	///
+	/// @param y converted y component
+	///
+	/// @param brightness converted brightness component
+	///
+	void rgbToXYBrightness(float red, float green, float blue, 
+			float& x, float& y, float& brightness);
+
+};