Everything is now OpenRA, not OpenRa

2010-02-27 21:10:22 +13:00
parent 11b926a422
commit 7881deca30
299 changed files with 26919 additions and 21 deletions
--- a/OpenRA.FileFormats/AudLoader.cs
+++ b/OpenRA.FileFormats/AudLoader.cs
@@ -0,0 +1,125 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System;
+using System.IO;
+
+namespace OpenRA.FileFormats
+{
+	[Flags]
+	enum SoundFlags
+	{
+		Stereo = 0x1,
+		_16Bit = 0x2,
+	}
+
+	enum SoundFormat
+	{
+		WestwoodCompressed = 1,
+		ImaAdpcm = 99,
+	}
+
+	struct Chunk
+	{
+		public int CompressedSize;
+		public int OutputSize;
+
+		public static Chunk Read(BinaryReader r)
+		{
+			Chunk c;
+			c.CompressedSize = r.ReadUInt16();
+			c.OutputSize = r.ReadUInt16();
+			if (0xdeaf != r.ReadUInt32())
+				throw new InvalidDataException("Chunk header is bogus");
+			return c;
+		}
+	}
+
+	public static class AudLoader
+	{
+		static int[] IndexAdjust = { -1, -1, -1, -1, 2, 4, 6, 8 };
+		static int[] StepTable = {
+									7,     8,     9,     10,    11,    12,     13,    14,    16,
+									17,    19,    21,    23,    25,    28,     31,    34,    37,
+									41,    45,    50,    55,    60,    66,     73,    80,    88,
+									97,    107,   118,   130,   143,   157,    173,   190,   209,
+									230,   253,   279,   307,   337,   371,    408,   449,   494,
+									544,   598,   658,   724,   796,   876,    963,   1060,  1166,
+									1282,  1411,  1552,  1707,  1878,  2066,   2272,  2499,  2749,
+									3024,  3327,  3660,  4026,  4428,  4871,   5358,  5894,  6484,
+									7132,  7845,  8630,  9493,  10442, 11487,  12635, 13899, 15289,
+									16818, 18500, 20350, 22385, 24623, 27086,  29794, 32767 };
+
+		static short DecodeSample(byte b, ref int index, ref int current)
+		{
+			var sb = (b & 8) != 0;
+			b &= 7;
+
+			var delta = (StepTable[index] * b) / 4 + StepTable[index] / 8;
+			if (sb) delta = -delta;
+
+			current += delta;
+			if (current > short.MaxValue) current = short.MaxValue;
+			if (current < short.MinValue) current = short.MinValue;
+
+			index += IndexAdjust[b];
+			if (index < 0) index = 0;
+			if (index > 88) index = 88;
+
+			return (short)current;
+		}
+
+		public static byte[] LoadSound(Stream s)
+		{
+			var br = new BinaryReader(s);
+			/*var sampleRate =*/ br.ReadUInt16();
+			var dataSize = br.ReadInt32();
+			var outputSize = br.ReadInt32();
+			/*var flags = (SoundFlags)*/ br.ReadByte();
+			/*var format = (SoundFormat)*/ br.ReadByte();
+
+			var output = new byte[outputSize];
+			var offset = 0;
+			var index = 0;
+			var currentSample = 0;
+
+			while (dataSize > 0)
+			{
+				var chunk = Chunk.Read(br);
+				for (int n = 0; n < chunk.CompressedSize; n++)
+				{
+					var b = br.ReadByte();
+
+					var t = DecodeSample(b, ref index, ref currentSample);
+					output[offset++] = (byte)t;
+					output[offset++] = (byte)(t >> 8);
+		
+					t = DecodeSample((byte)(b >> 4), ref index, ref currentSample);
+					output[offset++] = (byte)t;
+					output[offset++] = (byte)(t >> 8);
+				}
+
+				dataSize -= 8 + chunk.CompressedSize;
+			}
+
+			return output;
+		}
+	}
+}