public static MemoryStream LoadBLTEEntry(IndexEntry idxEntry, BinaryReader readStream = null, bool downloaded = false)
{
lock (readLock)
{
if (readStream == null)
{
return(null);
}
if (!downloaded)
{
readStream.BaseStream.Position = idxEntry.Offset + 30;
}
if (readStream.ReadUInt32() != 0x45544C42)
{
Trace.TraceError($"data.{idxEntry.Index:000}: Invalid BLTE signature at 0x{readStream.BaseStream.Position:X8}.");
return(null);
}
var blte = new BLTEEntry();
var frameHeaderLength = readStream.ReadBEInt32();
var chunks = 0u;
var size = 0L;
if (frameHeaderLength == 0)
{
chunks = 1;
size = idxEntry.Size - 38;
}
else
{
readStream.BaseStream.Position += 1;
chunks = readStream.ReadUInt24();
}
blte.Chunks = new BLTEChunk[chunks];
for (var i = 0; i < chunks; i++)
{
if (frameHeaderLength == 0)
{
blte.Chunks[i].CompressedSize = size;
blte.Chunks[i].UncompressedSize = size - 1;
}
else
{
blte.Chunks[i].CompressedSize = readStream.ReadBEInt32();
blte.Chunks[i].UncompressedSize = readStream.ReadBEInt32();
// Skip MD5 hash
readStream.BaseStream.Position += 16;
}
}
var data = new MemoryStream();
for (var i = 0; i < chunks; i++)
{
var formatCode = readStream.ReadByte();
var dataBytes = readStream.ReadBytes((int)blte.Chunks[i].CompressedSize - 1);
// Not compressed
if (formatCode == 0x4E)
{
data.Write(dataBytes, 0, (int)blte.Chunks[i].UncompressedSize);
}
// Compressed
else if (formatCode == 0x5A)
{
using (var decompressed = new MemoryStream())
{
using (var inflate = new DeflateStream(new MemoryStream(dataBytes, 2, dataBytes.Length - 2), CompressionMode.Decompress))
inflate.CopyTo(decompressed);
var inflateData = decompressed.ToArray();
data.Write(inflateData, 0, inflateData.Length);
}
}
else
{
}
}
data.Position = 0;
return(data);
}
}
public static MemoryStream LoadBLTEEntry(IndexEntry idxEntry, BinaryReader readStream = null, bool downloaded = false)
{
lock (readLock)
{
if (readStream == null)
{
return(null);
}
if (!downloaded)
{
readStream.BaseStream.Position = idxEntry.Offset + 30;
}
if (readStream.ReadUInt32() != 0x45544C42)
{
Trace.TraceError($"data.{idxEntry.Index:000}: Invalid BLTE signature at 0x{readStream.BaseStream.Position:X8}.");
return(null);
}
var blte = new BLTEEntry();
var frameHeaderLength = readStream.ReadBEInt32();
var chunks = 0u;
var size = 0L;
if (frameHeaderLength == 0)
{
chunks = 1;
size = idxEntry.Size - 38;
}
else
{
readStream.BaseStream.Position += 1;
chunks = readStream.ReadUInt24();
}
blte.Chunks = new BLTEChunk[chunks];
for (var i = 0; i < chunks; i++)
{
if (frameHeaderLength == 0)
{
blte.Chunks[i].CompressedSize = size;
blte.Chunks[i].UncompressedSize = size - 1;
}
else
{
blte.Chunks[i].CompressedSize = readStream.ReadBEInt32();
blte.Chunks[i].UncompressedSize = readStream.ReadBEInt32();
// Skip MD5 hash
readStream.BaseStream.Position += 16;
}
}
var data = new MemoryStream();
for (int i = 0; i < chunks; i++)
{
var dataBytes = readStream.ReadBytes((int)blte.Chunks[i].CompressedSize);
HandleDataBlock(dataBytes, i, data);
}
data.Position = 0;
return(data);
}
}
