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(arc3): fixed LZE decompression.

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This commit is contained in:
morkt 2018-03-27 13:38:36 +04:00
parent a3a196916c
commit c2181d1391
1 changed files with 43 additions and 2 deletions
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45
ArcFormats/CaramelBox/ArcARC3.cs
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@ -26,6 +26,7 @@
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
@ -50,7 +51,7 @@ namespace GameRes.Formats.CaramelBox
public Arc3Opener ()
{
Extensions = new string[] { "bin", "ar3" };
Extensions = new string[] { "bin", "ar3", "ac3" };
}
public override ArcFile TryOpen (ArcView file)
@ -134,6 +135,8 @@ namespace GameRes.Formats.CaramelBox
prev_entry = entry;
if (null == long_info && "longinfo.$$$" == name)
long_info = entry;
if (name.HasExtension ("lze"))
entry.Type = "image";
}
// --- read attributes ---
@ -214,7 +217,7 @@ namespace GameRes.Formats.CaramelBox
var data = new byte[unpacked_size];
var header = new byte[4];
int dst = 0;
using (var bits = new MsbBitStream (input, true))
using (var bits = new LzBitStream (input, true))
{
while (dst < data.Length)
{
@ -305,4 +308,42 @@ namespace GameRes.Formats.CaramelBox
return map;
}
}
/// <summary>
/// like MsbBitStream, but input stream is consumed by 2 bytes at a time.
/// </summary>
internal class LzBitStream : BitStream, IBitStream
{
public LzBitStream (Stream file, bool leave_open = false)
: base (file, leave_open)
{
}
public int GetBits (int count)
{
Debug.Assert (count <= 24, "LzBitStream does not support sequences longer than 24 bits");
while (m_cached_bits < count)
{
int b = m_input.ReadByte();
if (-1 == b)
return -1;
m_bits = (m_bits << 8) | b;
m_cached_bits += 8;
b = m_input.ReadByte();
if (b != -1)
{
m_bits = (m_bits << 8) | b;
m_cached_bits += 8;
}
}
int mask = (1 << count) - 1;
m_cached_bits -= count;
return (m_bits >> m_cached_bits) & mask;
}
public int GetNextBit ()
{
return GetBits (1);
}
}
}