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317 lines
10 KiB
C#
317 lines
10 KiB
C#
//! \file ArcCommon.cs
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//! \date Tue Aug 19 09:45:38 2014
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//! \brief Classes and functions common for various resource files.
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//
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// Copyright (C) 2014-2015 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using GameRes.Utility;
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using System;
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using System.IO;
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using System.Linq;
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namespace GameRes.Formats
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{
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public class AutoEntry : Entry
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{
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private Lazy<IResource> m_res;
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private Lazy<string> m_name;
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private Lazy<string> m_type;
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public override string Name
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{
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get { return m_name.Value; }
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set { m_name = new Lazy<string> (() => value); }
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}
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public override string Type
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{
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get { return m_type.Value; }
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set { m_type = new Lazy<string> (() => value); }
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}
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public AutoEntry (string name, Func<IResource> type_checker)
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{
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m_res = new Lazy<IResource> (type_checker);
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m_name = new Lazy<string> (() => GetName (name));
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m_type = new Lazy<string> (GetEntryType);
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}
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public static AutoEntry Create (ArcView file, long offset, string base_name)
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{
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return new AutoEntry (base_name, () => DetectFileType (file.View.ReadUInt32 (offset))) { Offset = offset };
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}
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public static IResource DetectFileType (uint signature)
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{
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if (0 == signature) return null;
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// resolve some special cases first
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if (OggAudio.Instance.Signature == signature)
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return OggAudio.Instance;
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if (AudioFormat.Wav.Signature == signature)
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return AudioFormat.Wav;
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if (0x4D42 == (signature & 0xFFFF)) // 'BM'
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return ImageFormat.Bmp;
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var res = FormatCatalog.Instance.LookupSignature (signature);
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if (!res.Any())
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return null;
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if (res.Skip (1).Any()) // type is ambiguous
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return null;
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return res.First();
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}
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private string GetName (string name)
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{
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if (null == m_res.Value)
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return name;
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var ext = m_res.Value.Extensions.FirstOrDefault();
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if (string.IsNullOrEmpty (ext))
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return name;
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return Path.ChangeExtension (name, ext);
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}
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private string GetEntryType ()
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{
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return null == m_res.Value ? "" : m_res.Value.Type;
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}
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}
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public class HuffmanDecoder
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{
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byte[] m_src;
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byte[] m_dst;
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ushort[] lhs = new ushort[512];
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ushort[] rhs = new ushort[512];
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ushort token = 256;
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int m_input_pos;
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int m_remaining;
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int m_cached_bits;
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int m_cache;
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public HuffmanDecoder (byte[] src, int index, int length, byte[] dst)
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{
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m_src = src;
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m_dst = dst;
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m_input_pos = index;
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m_remaining = length;
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m_cached_bits = 0;
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m_cache = 0;
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}
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public HuffmanDecoder (byte[] src, byte[] dst) : this (src, 0, src.Length, dst)
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{
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}
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public byte[] Unpack ()
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{
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int dst = 0;
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token = 256;
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ushort v3 = CreateTree();
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while (dst < m_dst.Length)
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{
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ushort symbol = v3;
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while ( symbol >= 0x100u )
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{
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if ( 0 != GetBits (1) )
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symbol = rhs[symbol];
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else
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symbol = lhs[symbol];
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}
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m_dst[dst++] = (byte)symbol;
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}
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return m_dst;
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}
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ushort CreateTree()
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{
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if ( 0 != GetBits (1) )
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{
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ushort v = token++;
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lhs[v] = CreateTree();
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rhs[v] = CreateTree();
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return v;
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}
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else
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{
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return (ushort)GetBits (8);
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}
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}
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uint GetBits (int n)
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{
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while (n > m_cached_bits)
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{
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if (0 == m_remaining)
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throw new ApplicationException ("Invalid huffman-compressed stream");
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int v = m_src[m_input_pos++];
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--m_remaining;
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m_cache = v | (m_cache << 8);
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m_cached_bits += 8;
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}
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uint mask = (uint)m_cache;
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m_cached_bits -= n;
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m_cache &= ~(-1 << m_cached_bits);
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return (uint)(((-1 << m_cached_bits) & mask) >> m_cached_bits);
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}
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}
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/// <summary>
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/// Create stream in TGA format from the given image pixels.
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/// </summary>
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[Obsolete]
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public static class TgaStream
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{
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public static Stream Create (ImageMetaData info, byte[] pixels, bool flipped = false)
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{
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var header = new byte[0x12];
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header[2] = (byte)(info.BPP > 8 ? 2 : 3);
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LittleEndian.Pack ((short)info.OffsetX, header, 8);
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LittleEndian.Pack ((short)info.OffsetY, header, 0xa);
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LittleEndian.Pack ((ushort)info.Width, header, 0xc);
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LittleEndian.Pack ((ushort)info.Height, header, 0xe);
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header[0x10] = (byte)info.BPP;
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if (!flipped)
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header[0x11] = 0x20;
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return new PrefixStream (header, new MemoryStream (pixels));
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}
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public static Stream Create (ImageMetaData info, int stride, byte[] pixels, bool flipped = false)
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{
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int tga_stride = (int)info.Width * info.BPP / 8;
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if (stride != tga_stride)
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{
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var adjusted = new byte[tga_stride * (int)info.Height];
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int src = 0;
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int dst = 0;
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for (uint y = 0; y < info.Height; ++y)
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{
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Buffer.BlockCopy (pixels, src, adjusted, dst, tga_stride);
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src += stride;
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dst += tga_stride;
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}
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pixels = adjusted;
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}
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return Create (info, pixels, flipped);
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}
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}
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public static class MMX
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{
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public static ulong PAddB (ulong x, ulong y)
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{
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ulong r = 0;
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for (ulong mask = 0xFF; mask != 0; mask <<= 8)
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{
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r |= ((x & mask) + (y & mask)) & mask;
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}
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return r;
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}
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public static uint PAddB (uint x, uint y)
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{
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uint r13 = (x & 0xFF00FF00u) + (y & 0xFF00FF00u);
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uint r02 = (x & 0x00FF00FFu) + (y & 0x00FF00FFu);
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return (r13 & 0xFF00FF00u) | (r02 & 0x00FF00FFu);
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}
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public static ulong PAddW (ulong x, ulong y)
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{
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ulong mask = 0xffff;
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ulong r = ((x & mask) + (y & mask)) & mask;
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mask <<= 16;
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r |= ((x & mask) + (y & mask)) & mask;
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mask <<= 16;
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r |= ((x & mask) + (y & mask)) & mask;
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mask <<= 16;
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r |= ((x & mask) + (y & mask)) & mask;
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return r;
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}
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public static ulong PAddD (ulong x, ulong y)
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{
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ulong mask = 0xffffffff;
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ulong r = ((x & mask) + (y & mask)) & mask;
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mask <<= 32;
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return r | ((x & mask) + (y & mask)) & mask;
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}
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public static ulong PSubB (ulong x, ulong y)
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{
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ulong r = 0;
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for (ulong mask = 0xFF; mask != 0; mask <<= 8)
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{
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r |= ((x & mask) - (y & mask)) & mask;
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}
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return r;
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}
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public static ulong PSubW (ulong x, ulong y)
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{
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ulong mask = 0xffff;
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ulong r = ((x & mask) - (y & mask)) & mask;
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mask <<= 16;
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r |= ((x & mask) - (y & mask)) & mask;
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mask <<= 16;
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r |= ((x & mask) - (y & mask)) & mask;
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mask <<= 16;
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r |= ((x & mask) - (y & mask)) & mask;
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return r;
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}
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public static ulong PSubD (ulong x, ulong y)
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{
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ulong mask = 0xffffffff;
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ulong r = ((x & mask) - (y & mask)) & mask;
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mask <<= 32;
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return r | ((x & mask) - (y & mask)) & mask;
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}
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public static ulong PSllD (ulong x, int count)
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{
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count &= 0x1F;
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ulong mask = 0xFFFFFFFFu << count;
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mask |= mask << 32;
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return (x << count) & mask;
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}
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public static ulong PSrlD (ulong x, int count)
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{
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count &= 0x1F;
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ulong mask = 0xFFFFFFFFu >> count;
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mask |= mask << 32;
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return (x >> count) & mask;
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}
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}
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public static class Dump
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{
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public static string DirectoryName = Environment.GetFolderPath (Environment.SpecialFolder.UserProfile);
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[System.Diagnostics.Conditional("DEBUG")]
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public static void Write (byte[] mem, string filename = "index.dat")
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{
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using (var dump = File.Create (Path.Combine (DirectoryName, filename)))
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dump.Write (mem, 0, mem.Length);
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}
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}
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}
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