From 09d515682bef4ad7382aea04708fa7a6b648bfba Mon Sep 17 00:00:00 2001
From: goyuken <goyuken@4bbf4f03-6f44-549e-7e59-35d4b0962838>
Date: Wed, 18 Dec 2013 20:37:32 +0000
Subject: [PATCH] add release envelope to super secret tone generator.  make
 NullEmulator date aware

---
 .../Base Implementations/NullEmulator.cs      | 55 ++++++++++++++-----
 1 file changed, 41 insertions(+), 14 deletions(-)

diff --git a/BizHawk.Emulation.Common/Interfaces/Base Implementations/NullEmulator.cs b/BizHawk.Emulation.Common/Interfaces/Base Implementations/NullEmulator.cs
index c88ee8f62f..87c638e4f7 100644
--- a/BizHawk.Emulation.Common/Interfaces/Base Implementations/NullEmulator.cs	
+++ b/BizHawk.Emulation.Common/Interfaces/Base Implementations/NullEmulator.cs	
@@ -30,6 +30,11 @@ namespace BizHawk.Emulation.Common
 					new MemoryDomain("Main RAM", 1, MemoryDomain.Endian.Little, addr => 0, (a, v) => { })
 				});
 			memoryDomains = new MemoryDomainList(domains);
+
+			var d = DateTime.Now;
+			xmas = d.Month == 12 && d.Day >= 17 && d.Day <= 27;
+			if (xmas)
+				pleg = new Pleg();
 		}
 		public void ResetCounters()
 		{
@@ -43,8 +48,10 @@ namespace BizHawk.Emulation.Common
 			for (int i = 0; i < 256 * 192; i++)
 			{
 				byte b = (byte)rand.Next();
-				frameBuffer[i] = Colors.ARGB(b, (byte)(255 - b), 0, 255);
-				//frameBuffer[i] = Colors.Luminosity((byte) rand.Next());
+				if (xmas)
+					frameBuffer[i] = Colors.ARGB(b, (byte)(255 - b), 0, 255);
+				else
+					frameBuffer[i] = Colors.Luminosity((byte) rand.Next());
 			}
 		}
 		public ControllerDefinition ControllerDefinition { get { return NullController; } }
@@ -79,7 +86,8 @@ namespace BizHawk.Emulation.Common
 			return new List<KeyValuePair<string, int>>();
 		}
 
-		Pleg pleg = new Pleg();
+		bool xmas;
+		Pleg pleg;
 
 		short[] sampbuff = new short[735 * 2];
 
@@ -87,7 +95,8 @@ namespace BizHawk.Emulation.Common
 		{
 			nsamp = 735;
 			samples = sampbuff;
-			pleg.Generate(samples);
+			if (xmas)
+				pleg.Generate(samples);
 		}
 
 		public void DiscardSamples()
@@ -96,7 +105,8 @@ namespace BizHawk.Emulation.Common
 
 		public void GetSamples(short[] samples)
 		{
-			pleg.Generate(samples);
+			if (xmas)
+				pleg.Generate(samples);
 		}
 
 		public int MaxVolume
@@ -115,6 +125,8 @@ namespace BizHawk.Emulation.Common
 		public int MaxVolume { get; set; }
 	}
 
+	#region super tone generator
+
 	class Pleg
 	{
 		string data = "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";
@@ -138,14 +150,10 @@ namespace BizHawk.Emulation.Common
 
 		void Off(int c, int n)
 		{
-			for (int i = 0; i < SinMen.Count; i++)
+			foreach (var s in SinMen)
 			{
-				var s = SinMen[i];
-				if (s.c == c && s.n == n)
-				{
-					SinMen.RemoveAt(i);
-					break;
-				}
+				if (s.c == c && s.n == n && !s.fading)
+					s.fading = true;
 			}
 		}
 		void On(int c, int n)
@@ -161,8 +169,19 @@ namespace BizHawk.Emulation.Common
 		short Next()
 		{
 			int ret = 0;
-			foreach (var s in SinMen)
-				ret += s.Next();
+			for (int i = 0; i < SinMen.Count; i++)
+			{
+				var s = SinMen[i];
+				if (s.Done)
+				{
+					SinMen.RemoveAt(i);
+					i--;
+				}
+				else
+				{
+					ret += s.Next();
+				}
+			}
 			if (ret > 32767) ret = 32767;
 			if (ret < -32767) ret = -32767;
 			return (short)ret;
@@ -214,6 +233,10 @@ namespace BizHawk.Emulation.Common
 		double freq;
 		double amp;
 
+		public bool fading = false;
+
+		public bool Done { get { return amp < 2.0; } }
+
 		static double GetFreq(int note)
 		{
 			return Math.Pow(2.0, note / 12.0) * 13.0;
@@ -225,6 +248,8 @@ namespace BizHawk.Emulation.Common
 			theta += freq * Math.PI / 22050.0;
 			if (theta >= Math.PI * 2.0)
 				theta -= Math.PI * 2.0;
+			if (fading)
+				amp *= 0.87;
 			return result;
 		}
 
@@ -235,4 +260,6 @@ namespace BizHawk.Emulation.Common
 		}
 
 	}
+
+	#endregion
 }