BizHawk/BizHawk.Emulation.Common/Base Implementations/NullEmulator.cs

using System;
using System.Collections.Generic;
using System.IO;
using BizHawk.Common;
using System.ComponentModel;

namespace BizHawk.Emulation.Common
{
	[CoreAttributes("NullHawk", "", false, true)]
	public class NullEmulator : IEmulator, IVideoProvider, ISyncSoundProvider, ISoundProvider, ISettable<NullEmulator.NullEmulatorSettings, object>
	{
		public NullEmulator(CoreComm comm, object settings)
		{
			ServiceProvider = new BasicServiceProvider(this);
			CoreComm = comm;
			_settings = (NullEmulatorSettings)settings ?? new NullEmulatorSettings();

			var d = DateTime.Now;
			xmas = d.Month == 12 && d.Day >= 17 && d.Day <= 27;
			if (xmas)
				pleg = new Pleg();
		}

		public IEmulatorServiceProvider ServiceProvider { get; private set; }

		public string SystemId { get { return "NULL"; } }
		public static readonly ControllerDefinition NullController = new ControllerDefinition { Name = "Null Controller" };

		public string BoardName { get { return null; } }

		private bool frameBufferClear = true;
		private readonly int[] frameBuffer = new int[256 * 192];
		private readonly Random rand = new Random();
		public CoreComm CoreComm { get; private set; }
		public ISoundProvider SoundProvider { get { return this; } }
		public ISyncSoundProvider SyncSoundProvider { get { return this; } }
		public bool StartAsyncSound() { return true; }
		public void EndAsyncSound() { }

		public void ResetCounters()
		{
			Frame = 0;
		}

		public void FrameAdvance(bool render, bool rendersound)
		{
			if (render == false) return;
			if (!_settings.SnowyDisplay)
			{
				if (frameBufferClear) return;
				frameBufferClear = true;
				Array.Clear(frameBuffer, 0, 256 * 192);
				return;
			}

			frameBufferClear = false;
			if (xmas)
			{
				for (int i = 0; i < 256 * 192; i++)
				{
					byte b = (byte)rand.Next();
					frameBuffer[i] = Colors.ARGB(b, (byte)(255 - b), 0, 255);
				}
			}
			else
			{
				for (int i = 0; i < 256*192; i++)
				{
					frameBuffer[i] = Colors.Luminosity((byte) rand.Next());
				}
			}

			Frame++;
		}
		public ControllerDefinition ControllerDefinition { get { return NullController; } }
		public IController Controller { get; set; }

		public int Frame { get; set; }
		public bool DeterministicEmulation { get { return true; } }

		public int[] GetVideoBuffer() { return frameBuffer; }
		public int VirtualWidth { get { return 256; } }
		public int VirtualHeight { get { return 192; } }
		public int BufferWidth { get { return 256; } }
		public int BufferHeight { get { return 192; } }
		public int BackgroundColor { get { return 0; } }

		public void Dispose() { }

		private bool xmas;
		private Pleg pleg;

		private short[] sampbuff = new short[735 * 2];

		public void GetSamples(out short[] samples, out int nsamp)
		{
			nsamp = 735;
			samples = sampbuff;
			if (!_settings.SnowyDisplay)
				return;
			if (xmas)
				pleg.Generate(samples);
		}

		public void DiscardSamples()
		{
		}

		public void GetSamples(short[] samples)
		{
			if (!_settings.SnowyDisplay)
				return;
			if (xmas)
				pleg.Generate(samples);
		}

		public int MaxVolume
		{
			get;
			set;
		}

		private NullEmulatorSettings _settings;

		public class NullEmulatorSettings
		{
			[DefaultValue(false)]
			public bool SnowyDisplay { get; set; }

			public NullEmulatorSettings()
			{
				SettingsUtil.SetDefaultValues(this);
			}

			public NullEmulatorSettings Clone()
			{
				return (NullEmulatorSettings)MemberwiseClone();
			}
		}

		public NullEmulatorSettings GetSettings()
		{
			return _settings.Clone();
		}

		public object GetSyncSettings()
		{
			return null;
		}

		public bool PutSettings(NullEmulatorSettings o)
		{
			_settings = o;
			return false;
		}

		public bool PutSyncSettings(object o)
		{
			return false;
		}
	}

	#region super tone generator

	class Bell
	{
		// ms ima adpcm
		const string dataz = "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

		private static readonly int[] AdaptationTable = { 230, 230, 230, 230, 307, 409, 512, 614, 768, 614, 512, 409, 307, 230, 230, 230 };
		private static readonly int[] AdaptCoeff1 = { 256, 512, 0, 192, 240, 460, 392 };
		private static readonly int[] AdaptCoeff2 = { 0, -256, 0, 64, 0, -208, -232 };

		private byte[] data;

		public Bell()
		{
			var gz = new System.IO.Compression.GZipStream(
				new MemoryStream(Convert.FromBase64String(dataz), false),
				System.IO.Compression.CompressionMode.Decompress);
			var ms = new MemoryStream();
			gz.CopyTo(ms);
			data = ms.ToArray();
			for (int i = 0; i < 3800; i++) // compenstate for sample start point
				Next();
		}

		private int blockpredictor;
		private int sample1;
		private int sample2;
		private int delta;

		private int idx = 0;
		private bool top = false;

		private int samplectr = 0;
		private const int sampleloop = 15360;

		public short Next()
		{
			int ret;

			if ((idx & 0x3ff) == 0) // start block
			{
				blockpredictor = data[idx] % 7;
				delta = (short)(data[idx + 1] | data[idx + 2] << 8);
				sample1 = (short)(data[idx + 3] | data[idx + 4] << 8);
				sample2 = (short)(data[idx + 5] | data[idx + 6] << 8);

				ret = sample2;
				idx++;
			}
			else if ((idx & 0x3ff) == 1)
			{
				ret = sample1;
				top = true;
				idx += 6;
			}
			else
			{
				int nibble = data[idx];
				if (top)
					nibble >>= 4;
				else
					idx++;
				top ^= true;
				nibble <<= 28;
				nibble >>= 28;

				int predictor = sample1 * AdaptCoeff1[blockpredictor] + sample2 * AdaptCoeff2[blockpredictor];
				predictor >>= 8;
				predictor += nibble * delta;
				if (predictor >= 32767) predictor = 32767;
				if (predictor <= -32768) predictor = -32768;
				ret = predictor;
				sample2 = sample1;
				sample1 = predictor;
				delta = AdaptationTable[nibble & 15] * delta;
				delta >>= 8;
				if (delta < 16) delta = 16;
			}
			samplectr++;
			if (samplectr == sampleloop)
			{
				samplectr = 0;
				idx = 0;
			}
			return (short)ret;
		}
	}

	class Pleg
	{
		const string data = "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";
		List<string> Lines = new List<string>();
		int LineIDX = 0;
		Bell bell = new Bell();

		public Pleg()
		{
			var gz = new System.IO.Compression.GZipStream(
				new MemoryStream(Convert.FromBase64String(data), false),
				System.IO.Compression.CompressionMode.Decompress);
			var tr = new StreamReader(gz);
			string line;
			while ((line = tr.ReadLine()) != null)
				Lines.Add(line);
		}

		List<SinMan> SinMen = new List<SinMan>();

		int deadtime = 0;

		void Off(int c, int n)
		{
			foreach (var s in SinMen)
			{
				if (s.c == c && s.n == n && !s.fading)
					s.fading = true;
			}
		}
		void On(int c, int n)
		{
			if (c == 9)
				return;
			var s = new SinMan(1500, n);
			s.c = c;
			s.n = n;
			SinMen.Add(s);
		}

		short Next()
		{
			int ret = 0;
			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;
		}

		string FetchNext()
		{
			string ret = Lines[LineIDX];
			LineIDX++;
			if (LineIDX == Lines.Count)
				LineIDX = 0;
			return ret;
		}

		public void Generate(short[] dest)
		{
			int idx = 0;
			while (idx < dest.Length)
			{
				if (deadtime > 0)
				{
					short n = Next();
					n += bell.Next();
					dest[idx++] = n;
					dest[idx++] = n;
					deadtime--;
				}
				else
				{
					string[] s = FetchNext().Split(':');
					char c = s[0][0];
					if (c == 'A')
						deadtime = int.Parse(s[1]) * 40;
					else if (c == 'O')
						On(int.Parse(s[2]), int.Parse(s[1]));
					else if (c == 'F')
						Off(int.Parse(s[2]), int.Parse(s[1]));
				}
			}

		}
	}

	class SinMan
	{
		public int c;
		public int n;

		double theta;
		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;
		}

		public short Next()
		{
			short result = (short)(Math.Sin(theta) * amp);
			theta += freq * Math.PI / 22050.0;
			if (theta >= Math.PI * 2.0)
				theta -= Math.PI * 2.0;
			if (fading)
				amp *= 0.87;
			return result;
		}

		public SinMan(int amp, int note)
		{
			this.amp = amp;
			this.freq = GetFreq(note);
		}

	}

	#endregion
}