public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var mca = arc as McaArchive;
int method = arc.File.View.ReadInt32(entry.Offset);
if (null == mca || method < 0 || method > 1)
{
return(base.OpenEntry(arc, entry));
}
uint width = arc.File.View.ReadUInt32(entry.Offset + 0xC);
uint height = arc.File.View.ReadUInt32(entry.Offset + 0x10);
uint packed_size = arc.File.View.ReadUInt32(entry.Offset + 0x14);
int unpacked_size = arc.File.View.ReadInt32(entry.Offset + 0x18);
var data = arc.File.View.ReadBytes(entry.Offset + 0x20, packed_size);
MrgOpener.Decrypt(data, 0, data.Length, mca.Key);
if (method > 0)
{
using (var input = new MemoryStream(data))
using (var lzss = new MrgLzssReader(input, data.Length, unpacked_size))
{
lzss.Unpack();
data = lzss.Data;
}
}
int stride = ((int)width * 3 + 3) & ~3;
var info = new ImageMetaData {
Width = width, Height = height, BPP = 24
};
return(TgaStream.Create(info, stride, data));
}
public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (ClmMetaData)info;
stream.Position = meta.DataOffset;
PixelFormat format;
BitmapPalette palette = null;
if (8 == meta.BPP)
{
format = PixelFormats.Indexed8;
palette = ReadPalette(stream.AsStream);
}
else if (24 == meta.BPP)
{
format = PixelFormats.Bgr24;
}
else if (32 == meta.BPP)
{
format = PixelFormats.Bgr32;
}
else
{
throw new NotSupportedException("Not supported CLM color depth");
}
int packed_size = (int)(stream.Length - stream.Position);
using (var reader = new MrgLzssReader(stream, packed_size, meta.UnpackedSize))
{
reader.Unpack();
return(ImageData.Create(info, format, palette, reader.Data));
}
}
public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (AcdMetaData)info;
stream.Position = meta.DataOffset;
using (var reader = new MrgLzssReader(stream, meta.PackedSize, meta.UnpackedSize))
{
reader.Unpack();
var decoder = new AcdDecoder(reader.Data, meta);
decoder.Unpack();
return(ImageData.Create(info, PixelFormats.Gray8, null, decoder.Data));
}
throw new InvalidFormatException();
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = info as AcdMetaData;
if (null == meta)
throw new ArgumentException ("AcdFormat.Read should be supplied with AcdMetaData", "info");
stream.Position = meta.DataOffset;
using (var reader = new MrgLzssReader (stream, meta.PackedSize, meta.UnpackedSize))
{
reader.Unpack();
var decoder = new AcdDecoder (reader.Data, meta);
decoder.Unpack();
return ImageData.Create (info, PixelFormats.Gray8, null, decoder.Data);
}
throw new InvalidFormatException();
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = info as AcdMetaData;
if (null == meta)
{
throw new ArgumentException("AcdFormat.Read should be supplied with AcdMetaData", "info");
}
stream.Position = meta.DataOffset;
using (var reader = new MrgLzssReader(stream, meta.PackedSize, meta.UnpackedSize))
{
reader.Unpack();
var decoder = new AcdDecoder(reader.Data, meta);
decoder.Unpack();
return(ImageData.Create(info, PixelFormats.Gray8, null, decoder.Data));
}
throw new InvalidFormatException();
}
protected override ImageData GetImageData()
{
m_input.Position = 0x20;
var data = m_input.ReadBytes(m_packed_size);
MrgOpener.Decrypt(data, 0, data.Length, m_key);
if (m_compressed)
{
using (var input = new BinMemoryStream(data))
using (var lzss = new MrgLzssReader(input, data.Length, m_unpacked_size))
{
lzss.Unpack();
data = lzss.Data;
}
}
int stride = ((int)Info.Width * Info.BPP / 8 + 3) & ~3;
var format = 8 == Info.BPP ? PixelFormats.Indexed8 : PixelFormats.Bgr24;
return(ImageData.Create(Info, format, m_palette, data, stride));
}
void UnpackV101()
{
if (m_key != 0)
{
MrgOpener.Decrypt(m_input, 0, m_input.Length - 1, m_key);
}
#if DEBUG
else // bruteforce key *in debug build only*
{
var copy = new byte[m_input.Length];
for (int key = 1; key < 256; ++key)
{
Buffer.BlockCopy(m_input, 0, copy, 0, m_input.Length);
MrgOpener.Decrypt(copy, 0, copy.Length - 1, (byte)key);
using (var input = new BinMemoryStream(copy))
using (var lzss = new MrgLzssReader(input, copy.Length, Stride * m_height))
{
lzss.Unpack();
if (input.Length - input.Position <= 1)
{
Trace.WriteLine(string.Format("Found matching key {0:X2}", key), "[MCG]");
m_output = lzss.Data;
m_key = (byte)key;
return;
}
}
}
}
#endif
using (var input = new BinMemoryStream(m_input))
using (var lzss = new MrgLzssReader(input, m_input.Length, Stride * m_height))
{
lzss.Unpack();
// data remaining within input stream indicates invalid encryption key
if (input.Length - input.Position > 1)
{
m_key = 0;
}
m_output = lzss.Data;
}
}
void UnpackV101()
{
if (m_key != 0)
{
MrgOpener.Decrypt(m_input, 0, m_input.Length - 1, m_key);
}
#if DEBUG
else // bruteforce key *in debug build only*
{
for (int key = 1; key < 256; ++key)
{
var copy = m_input.Clone() as byte[];
MrgOpener.Decrypt(copy, 0, copy.Length - 1, (byte)key);
using (var input = new BinMemoryStream(copy))
using (var lzss = new MrgLzssReader(input, m_input.Length, Stride * m_height))
{
lzss.Unpack();
if (input.Length - input.Position <= 1)
{
m_output = lzss.Data;
m_key = (byte)key;
return;
}
}
}
}
#endif
using (var input = new BinMemoryStream(m_input))
using (var lzss = new MrgLzssReader(input, m_input.Length, Stride * m_height))
{
lzss.Unpack();
// data remaining within input stream indicates invalid encryption key
if (input.Length - input.Position > 1)
{
m_key = 0;
}
m_output = lzss.Data;
}
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var mrg_entry = entry as Mrg2Entry;
if (null == mrg_entry || mrg_entry.Method > 3)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
IBinaryStream input;
if (0 == mrg_entry.Method)
{
var data = arc.File.View.ReadBytes(entry.Offset, entry.Size);
Decrypt(data, 0, data.Length, mrg_entry.Key, mrg_entry.ArcKey);
input = new BinMemoryStream(data, entry.Name);
}
else if (mrg_entry.Method >= 2)
{
var data = arc.File.View.ReadBytes(entry.Offset, entry.Size);
var reader = new MrgDecoder(data);
reader.Unpack();
input = new BinMemoryStream(reader.Data, entry.Name);
}
else
{
input = arc.File.CreateStream(entry.Offset, entry.Size);
}
if (1 == mrg_entry.Method || 3 == mrg_entry.Method)
{
using (input)
using (var reader = new MrgLzssReader(input, (int)input.Length, (int)mrg_entry.UnpackedSize))
{
reader.Unpack();
return(new BinMemoryStream(reader.Data, entry.Name));
}
}
return(input.AsStream);
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var packed_entry = entry as MrgEntry;
if (null == packed_entry || !packed_entry.IsPacked || packed_entry.Method > 3)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
Stream input;
if (packed_entry.Method >= 2)
{
if (entry.Size < 0x108)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
var data = new byte[entry.Size];
arc.File.View.Read(entry.Offset, data, 0, entry.Size);
var reader = new MrgDecoder(data);
reader.Unpack();
input = new MemoryStream(reader.Data);
}
else
{
input = arc.File.CreateStream(entry.Offset, entry.Size);
}
if (packed_entry.Method < 3)
{
using (input)
using (var reader = new MrgLzssReader(input, (int)input.Length, (int)packed_entry.UnpackedSize))
{
reader.Unpack();
return(new MemoryStream(reader.Data));
}
}
return(input);
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = (ClmMetaData)info;
stream.Position = meta.DataOffset;
PixelFormat format;
BitmapPalette palette = null;
if (8 == meta.BPP)
{
format = PixelFormats.Indexed8;
palette = ReadPalette (stream);
}
else if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (32 == meta.BPP)
format = PixelFormats.Bgr32;
else
throw new NotSupportedException ("Not supported CLM color depth");
int packed_size = (int)(stream.Length - stream.Position);
using (var reader = new MrgLzssReader (stream, packed_size, meta.UnpackedSize))
{
reader.Unpack();
return ImageData.Create (info, format, palette, reader.Data);
}
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var packed_entry = entry as MrgEntry;
if (null == packed_entry || !packed_entry.IsPacked || packed_entry.Method > 3)
return arc.File.CreateStream (entry.Offset, entry.Size);
Stream input;
if (packed_entry.Method >= 2)
{
if (entry.Size < 0x108)
return arc.File.CreateStream (entry.Offset, entry.Size);
var data = new byte[entry.Size];
arc.File.View.Read (entry.Offset, data, 0, entry.Size);
var reader = new MrgDecoder (data);
reader.Unpack();
input = new MemoryStream (reader.Data);
}
else
input = arc.File.CreateStream (entry.Offset, entry.Size);
if (packed_entry.Method < 3)
{
using (input)
using (var reader = new MrgLzssReader (input, (int)input.Length, (int)packed_entry.UnpackedSize))
{
reader.Unpack();
return new MemoryStream (reader.Data);
}
}
return input;
}
