public void ExtractData(Stream stream)
{
int magic = reader.ReadInt32(); // BLTE (raw)
if (magic != 0x45544c42)
{
throw new InvalidDataException("BLTEHandler: magic");
}
int frameHeaderSize = reader.ReadInt32BE();
int chunkCount = 0;
int totalSize = 0;
if (frameHeaderSize == 0)
{
totalSize = size - 8;// - 38;
chunkCount = 1;
}
else
{
byte unk1 = reader.ReadByte(); // byte
if (unk1 != 0x0F)
{
throw new InvalidDataException("unk1 != 0x0F");
}
byte v1 = reader.ReadByte();
byte v2 = reader.ReadByte();
byte v3 = reader.ReadByte();
chunkCount = v1 << 16 | v2 << 8 | v3 << 0; // 3-byte
}
if (chunkCount < 0)
{
throw new InvalidDataException(String.Format("Possible error ({0}) at offset: 0x" + reader.BaseStream.Position.ToString("X"), chunkCount));
}
var chunks = new List <BLTEChunk>(chunkCount);
for (int i = 0; i < chunkCount; ++i)
{
var chunk = new BLTEChunk();
if (frameHeaderSize != 0)
{
chunk.CompSize = reader.ReadInt32BE();
chunk.DecompSize = reader.ReadInt32BE();
chunk.Hash = reader.ReadBytes(16);
}
else
{
chunk.CompSize = totalSize;
chunk.DecompSize = totalSize - 1;
chunk.Hash = null;
}
chunks.Add(chunk);
}
foreach (var chunk in chunks)
{
chunk.Data = reader.ReadBytes(chunk.CompSize);
if (chunk.Data.Length != chunk.CompSize)
{
throw new Exception("chunks[i].data.Length != chunks[i].compSize");
}
if (frameHeaderSize != 0)
{
byte[] hh = md5.ComputeHash(chunk.Data);
if (!hh.EqualsTo(chunk.Hash))
{
throw new InvalidDataException("MD5 missmatch!");
}
}
switch (chunk.Data[0])
{
//case 0x45: // E
// break;
//case 0x46: // F
// break;
case 0x4E: // N
if (chunk.Data.Length - 1 != chunk.DecompSize)
{
throw new InvalidDataException("Possible error (1) !");
}
stream.Write(chunk.Data, 1, chunk.DecompSize);
break;
case 0x5A: // Z
Decompress(stream, chunk.Data);
break;
default:
throw new InvalidDataException("Unknown byte at switch case!");
}
}
}
public void ExtractData(Stream stream)
{
int magic = reader.ReadInt32(); // BLTE (raw)
if (magic != 0x45544c42)
throw new InvalidDataException("BLTEHandler: magic");
int frameHeaderSize = reader.ReadInt32BE();
int chunkCount = 0;
int totalSize = 0;
if (frameHeaderSize == 0)
{
totalSize = size - 8;// - 38;
chunkCount = 1;
}
else
{
byte unk1 = reader.ReadByte(); // byte
if (unk1 != 0x0F)
throw new InvalidDataException("unk1 != 0x0F");
byte v1 = reader.ReadByte();
byte v2 = reader.ReadByte();
byte v3 = reader.ReadByte();
chunkCount = v1 << 16 | v2 << 8 | v3 << 0; // 3-byte
}
if (chunkCount < 0)
throw new InvalidDataException(String.Format("Possible error ({0}) at offset: 0x" + reader.BaseStream.Position.ToString("X"), chunkCount));
var chunks = new List<BLTEChunk>(chunkCount);
for (int i = 0; i < chunkCount; ++i)
{
var chunk = new BLTEChunk();
if (frameHeaderSize != 0)
{
chunk.CompSize = reader.ReadInt32BE();
chunk.DecompSize = reader.ReadInt32BE();
chunk.Hash = reader.ReadBytes(16);
}
else
{
chunk.CompSize = totalSize;
chunk.DecompSize = totalSize - 1;
chunk.Hash = null;
}
chunks.Add(chunk);
}
foreach (var chunk in chunks)
{
chunk.Data = reader.ReadBytes(chunk.CompSize);
if (chunk.Data.Length != chunk.CompSize)
throw new Exception("chunks[i].data.Length != chunks[i].compSize");
if (frameHeaderSize != 0)
{
byte[] hh = md5.ComputeHash(chunk.Data);
if (!hh.EqualsTo(chunk.Hash))
throw new InvalidDataException("MD5 missmatch!");
}
switch (chunk.Data[0])
{
//case 0x45: // E
// break;
//case 0x46: // F
// break;
case 0x4E: // N
if (chunk.Data.Length - 1 != chunk.DecompSize)
throw new InvalidDataException("Possible error (1) !");
stream.Write(chunk.Data, 1, chunk.DecompSize);
break;
case 0x5A: // Z
Decompress(stream, chunk.Data);
break;
default:
throw new InvalidDataException("Unknown byte at switch case!");
}
}
}
