Start to make possible use of "full analog surface". (useful for triggers on some silly physical gamepads)

Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.cpp

@@ -461,7 +461,7 @@ ControllerInterface::Device::Control* ControllerInterface::InputReference::Detec
 		i = device->Inputs().begin(),
 		e = device->Inputs().end();
 	for (std::vector<bool>::iterator state = states.begin(); i != e; ++i)
-		*state++ = ((*i)->GetState() > INPUT_DETECT_THRESHOLD);
+		*state++ = ((*i)->GetState() > (1 - INPUT_DETECT_THRESHOLD));
 
 	while (time < ms)
 	{
@@ -477,7 +477,7 @@ ControllerInterface::Device::Control* ControllerInterface::InputReference::Detec
 				if (false == *state)
 					return *i;
 			}
-			else
+			else if ((*i)->GetState() < (1 - INPUT_DETECT_THRESHOLD))
 				*state = false;
 		}
 		Common::SleepCurrentThread(10); time += 10;

Source/Core/InputCommon/Src/ControllerInterface/ControllerInterface.h

@@ -87,7 +87,7 @@ public:
 
 			Input* ToInput() { return this; }
 		};
-		
+
 		//
 		//		Output
 		//
@@ -122,6 +122,36 @@ public:
 	protected:
 		void AddInput(Input* const i);
 		void AddOutput(Output* const o);
+		
+		class FullAnalogSurface : public Input
+		{
+		public:
+			FullAnalogSurface(Input* low, Input* high)
+				: m_low(*low), m_high(*high)
+			{}
+
+			ControlState GetState() const
+			{
+				return (1 + m_high.GetState() - m_low.GetState()) / 2;
+			}
+
+			std::string GetName() const
+			{
+				return m_low.GetName() + *m_high.GetName().rbegin();
+			}
+
+		private:
+			Input& m_low;
+			Input& m_high;
+		};
+
+		void AddAnalogInputs(Input* low, Input* high)
+		{
+			AddInput(low);
+			AddInput(high);
+			AddInput(new FullAnalogSurface(low, high));
+			AddInput(new FullAnalogSurface(high, low));
+		}
 
 	private:
 		std::vector<Input*>		m_inputs;