private void ReadWebData(EndianBinaryReader reader)
{
var signature = reader.ReadStringToNull();
if (signature != "UnityWebData1.0")
{
return;
}
var headLength = reader.ReadInt32();
var dataList = new List <WebData>();
while (reader.Position < headLength)
{
var data = new WebData();
data.dataOffset = reader.ReadInt32();
data.dataLength = reader.ReadInt32();
var pathLength = reader.ReadInt32();
data.path = Encoding.UTF8.GetString(reader.ReadBytes(pathLength));
dataList.Add(data);
}
foreach (var data in dataList)
{
var file = new MemoryFile();
file.fileName = Path.GetFileName(data.path);
reader.Position = data.dataOffset;
file.stream = new MemoryStream(reader.ReadBytes(data.dataLength));
fileList.Add(file);
}
}
private void GetAssetsFiles(EndianBinaryReader reader, int offset)
{
int fileCount = reader.ReadInt32();
for (int i = 0; i < fileCount; i++)
{
var file = new MemoryFile();
file.fileName = reader.ReadStringToNull();
int fileOffset = reader.ReadInt32();
fileOffset += offset;
int fileSize = reader.ReadInt32();
long nextFile = reader.Position;
reader.Position = fileOffset;
var buffer = reader.ReadBytes(fileSize);
file.stream = new MemoryStream(buffer);
fileList.Add(file);
reader.Position = nextFile;
}
}
private void ReadFormat6(EndianBinaryReader bundleReader, bool padding = false)
{
var bundleSize = bundleReader.ReadInt64();
int compressedSize = bundleReader.ReadInt32();
int uncompressedSize = bundleReader.ReadInt32();
int flag = bundleReader.ReadInt32();
if (padding)
{
bundleReader.ReadByte();
}
byte[] blocksInfoBytes;
if ((flag & 0x80) != 0)//at end of file
{
var position = bundleReader.Position;
bundleReader.Position = bundleReader.BaseStream.Length - compressedSize;
blocksInfoBytes = bundleReader.ReadBytes(compressedSize);
bundleReader.Position = position;
}
else
{
blocksInfoBytes = bundleReader.ReadBytes(compressedSize);
}
MemoryStream blocksInfoStream;
switch (flag & 0x3F)
{
default: //None
{
blocksInfoStream = new MemoryStream(blocksInfoBytes);
break;
}
case 1: //LZMA
{
blocksInfoStream = SevenZipHelper.StreamDecompress(new MemoryStream(blocksInfoBytes));
break;
}
case 2: //LZ4
case 3: //LZ4HC
{
byte[] uncompressedBytes = new byte[uncompressedSize];
using (var decoder = new Lz4DecoderStream(new MemoryStream(blocksInfoBytes)))
{
decoder.Read(uncompressedBytes, 0, uncompressedSize);
}
blocksInfoStream = new MemoryStream(uncompressedBytes);
break;
}
//case 4:LZHAM?
}
using (var blocksInfo = new EndianBinaryReader(blocksInfoStream))
{
blocksInfo.Position = 0x10;
int blockcount = blocksInfo.ReadInt32();
var assetsDataStream = new MemoryStream();
for (int i = 0; i < blockcount; i++)
{
uncompressedSize = blocksInfo.ReadInt32();
compressedSize = blocksInfo.ReadInt32();
flag = blocksInfo.ReadInt16();
var compressedBytes = bundleReader.ReadBytes(compressedSize);
switch (flag & 0x3F)
{
default: //None
{
assetsDataStream.Write(compressedBytes, 0, compressedSize);
break;
}
case 1: //LZMA
{
var uncompressedBytes = new byte[uncompressedSize];
using (var mstream = new MemoryStream(compressedBytes))
{
var decoder = SevenZipHelper.StreamDecompress(mstream, uncompressedSize);
decoder.Read(uncompressedBytes, 0, uncompressedSize);
decoder.Dispose();
}
assetsDataStream.Write(uncompressedBytes, 0, uncompressedSize);
break;
}
case 2: //LZ4
case 3: //LZ4HC
{
var uncompressedBytes = new byte[uncompressedSize];
using (var decoder = new Lz4DecoderStream(new MemoryStream(compressedBytes)))
{
decoder.Read(uncompressedBytes, 0, uncompressedSize);
}
assetsDataStream.Write(uncompressedBytes, 0, uncompressedSize);
break;
}
//case 4:LZHAM?
}
}
using (var assetsDataReader = new EndianBinaryReader(assetsDataStream))
{
var entryinfo_count = blocksInfo.ReadInt32();
for (int i = 0; i < entryinfo_count; i++)
{
var file = new MemoryFile();
var entryinfo_offset = blocksInfo.ReadInt64();
var entryinfo_size = blocksInfo.ReadInt64();
flag = blocksInfo.ReadInt32();
file.fileName = Path.GetFileName(blocksInfo.ReadStringToNull());
assetsDataReader.Position = entryinfo_offset;
var buffer = assetsDataReader.ReadBytes((int)entryinfo_size);
file.stream = new MemoryStream(buffer);
fileList.Add(file);
}
}
}
}
