GARbro-mirror/ArcFormats/ArcCommon.cs

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