N64 - add the rsp-z64-hlevideo plugin and add backend support for toggling between this and rsp-hle. Still todo: front end to set this

BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64.cs

@@ -105,8 +105,13 @@ namespace BizHawk.Emulation.Cores.Nintendo.N64
 			_videoProvider = new N64VideoProvider(api, videosettings);
 			_audioProvider = new N64Audio(api);
 			_inputProvider = new N64Input(api, comm, this._syncSettings.Controllers);
-			api.AttachPlugin(mupen64plusApi.m64p_plugin_type.M64PLUGIN_RSP,
-				"mupen64plus-rsp-hle.dll");
+
+
+			string rsp = _syncSettings.RspType == N64SyncSettings.RSPTYPE.Rsp_Hle ?
+				"mupen64plus-rsp-hle.dll" :
+				"mupen64plus-rsp-z64-hlevideo.dll";
+
+			api.AttachPlugin(mupen64plusApi.m64p_plugin_type.M64PLUGIN_RSP, rsp);
 
 			InitMemoryDomains();
 			RefreshMemoryCallbacks();

BizHawk.Emulation.Cores/Consoles/Nintendo/N64/N64SyncSettings.cs

@@ -22,6 +22,17 @@ namespace BizHawk.Emulation.Cores.Nintendo.N64
 			Dynarec = 2,
 		}
 
+		public RSPTYPE RspType = RSPTYPE.Rsp_Hle;
+
+		public enum RSPTYPE
+		{
+			[Description("RSP HLE")]
+			Rsp_Hle = 0,
+
+			[Description("RSP Z64 HLE Video")]
+			Rsp_Z64_hlevideo = 1
+		}
+
 		public PLUGINTYPE VidPlugin = PLUGINTYPE.RICE;
 		public int VideoSizeX = 320;
 		public int VideoSizeY = 240;