Feature: Local Multiplayer Support (#2)

* conformed to updated EmulatorBridging protocol to allow for local multiplayer support, and implements sending per-player inputs to the emulator core

* updates based on PR feedback

---------

Co-authored-by: Ian Clawson <ianclawson@Ians-MBP-2.guidecx>

NESDeltaCore/Bridge/NESEmulatorBridge.swift

@@ -325,11 +325,11 @@ public extension NESEmulatorBridge
         }
     }
 
-    func activateInput(_ input: Int, value: Double)
+    func activateInput(_ input: Int, value: Double, playerIndex: Int)
     {
         #if NATIVE
 
-        NESActivateInput(Int32(input))
+        NESActivateInput(Int32(input), Int32(playerIndex))
 
         #else
 
@@ -345,11 +345,11 @@ public extension NESEmulatorBridge
         #endif
     }
 
-    func deactivateInput(_ input: Int)
+    func deactivateInput(_ input: Int, playerIndex: Int)
     {
         #if NATIVE
 
-        NESDeactivateInput(Int32(input))
+        NESDeactivateInput(Int32(input), Int32(playerIndex))
 
         #else
 

NestopiaJS/NESEmulatorBridge.cpp

@@ -174,19 +174,22 @@ void NESRunFrame()
 
 #pragma mark - Inputs -
 
-void NESActivateInput(int input)
+void NESActivateInput(int input, int playerIndex)
 {
-    nes_controllers.pad[0].buttons |= input;
+    nes_controllers.pad[playerIndex].buttons |= input;
 }
 
-void NESDeactivateInput(int input)
+void NESDeactivateInput(int input, int playerIndex)
 {
-    nes_controllers.pad[0].buttons &= ~input;
+    nes_controllers.pad[playerIndex].buttons &= ~input;
 }
 
 void NESResetInputs()
 {
-    nes_controllers.pad[0].buttons = 0;
+    for (int index = 0; index < Nes::Api::Input::NUM_PADS ; index++)
+    {
+        nes_controllers.pad[index].buttons = 0;
+    }
 }
 
 #pragma mark - Save States -

NestopiaJS/NESEmulatorBridge.hpp

@@ -27,8 +27,8 @@ extern "C"
 
     void NESRunFrame();
 
-    void NESActivateInput(int input);
-    void NESDeactivateInput(int input);
+    void NESActivateInput(int input, int playerIndex);
+    void NESDeactivateInput(int input, int playerIndex);
     void NESResetInputs();
 
     void NESSaveSaveState(const char *_Nonnull saveStatePath);