add distinct coin input debounce preference

This commit adds a preference, DebounceCoinInputTime (defaults is 0), which allows coin input to be debounced via a float value separate from other input.

src/InputFilter.cpp

@@ -7,6 +7,8 @@
 #include "RageThreads.h"
 #include "Preference.h"
 #include "Foreach.h"
+#include "GameInput.h"
+#include "InputMapper.h"
 // for mouse stuff: -aj
 #include "PrefsManager.h"
 #include "ScreenDimensions.h"
@@ -230,10 +232,24 @@ void InputFilter::CheckButtonChange( ButtonState &bs, DeviceInput di, const Rage
 	if( bs.m_BeingHeld == bs.m_bLastReportedHeld )
 		return;
 	
+	GameInput gi;
+
+	/* Possibly apply debounce,
+	 * If the input was coin, possibly apply distinct coin debounce in the else below. */
+	if (! INPUTMAPPER->DeviceToGame(di, gi) || gi.button != GAME_BUTTON_COIN )
+	{
 		/* If the last IET_FIRST_PRESS or IET_RELEASE event was sent too recently,
 		 * wait a while before sending it. */
 		if( now - bs.m_LastReportTime < g_fInputDebounceTime )
+		{
 			return;
+		}
+	} else {
+		if( now - bs.m_LastReportTime < PREFSMAN->m_fDebounceCoinInputTime )
+		{
+			return;
+		}
+	}
 	
 	bs.m_LastReportTime = now;
 	bs.m_bLastReportedHeld = bs.m_BeingHeld;

src/PrefsManager.cpp

@@ -254,6 +254,7 @@ PrefsManager::PrefsManager() :
 	m_bAllowMultipleHighScoreWithSameName	( "AllowMultipleHighScoreWithSameName",	true ),
 	m_bCelShadeModels		( "CelShadeModels",			false ),	// Work-In-Progress.. disable by default.
 	m_bPreferredSortUsesGroups	( "PreferredSortUsesGroups",		true ),
+	m_fDebounceCoinInputTime	( "DebounceCoinInputTime",		0 ),
 
 	m_fPadStickSeconds		( "PadStickSeconds",			0 ),
 	m_bForceMipMaps			( "ForceMipMaps",			false ),

src/PrefsManager.h

@@ -245,6 +245,7 @@ public:
 	Preference<bool>	m_bAllowMultipleHighScoreWithSameName;
 	Preference<bool>	m_bCelShadeModels;
 	Preference<bool>	m_bPreferredSortUsesGroups;
+	Preference<float>	m_fDebounceCoinInputTime; // allow users to apply a distinct debounce to coin input
 
 	// Number of seconds it takes for a button on the controller to release
 	// after pressed.