private int readNextBlock(byte[] dest, int offset)
{
if (idx >= _infos.Length)
{
throw new IndexOutOfRangeException();
}
switch (_infos[idx].flag)
{
default:
_reader.ReadBytes(dest, offset, _infos[idx].uncompressedSize);
break;
case 1: // LZMA
throw new NotSupportedException("LZMA is not supported");
case 2: // LZ4
case 3: // LZ4HC
_reader.ReadLZ4Data(_infos[idx].compressedSize, _infos[idx].uncompressedSize, dest, offset);
break;
}
return(_infos[idx++].uncompressedSize);
}
private void readFiles(UnityBinaryReader reader)
{
int compressedSize = reader.ReadIntBE();
int uncompressedSize = reader.ReadIntBE();
int flag = reader.ReadIntBE();
UnityBinaryReader inforeader;
if ((flag & 0x80) != 0) // At end of file
{
throw new NotImplementedException("BlockInfos are at the end of file");
}
// Decompress Infos (if needed)
int compressiontype = flag & 0x3F;
switch (compressiontype)
{
default: // None
inforeader = reader;
break;
case 1: // LZMA(Not Supported)
throw new NotSupportedException("LZMA is not supported");
case 2: //LZ4
case 3: //LZ4HC
{
byte[] infobytes = MemoryPool <AssetBundleFile> .GetBuffer(uncompressedSize);
reader.ReadLZ4Data(compressedSize, uncompressedSize, infobytes, 0);
inforeader = new UnityBinaryReader(infobytes, 0, uncompressedSize);
break;
}
}
// Read Block Infos
inforeader.Position += 0x10;
int blockcount = inforeader.ReadIntBE();
var blockinfos = new BlockInfo[blockcount];
blockinfos.Read(inforeader);
// Read File Infos
int filecount = inforeader.ReadIntBE();
Files = new FileType[filecount];
long[] fileoffsets = new long[filecount];
for (int i = 0; i < filecount; i++)
{
Files[i] = new FileType();
fileoffsets[i] = inforeader.ReadLongBE();
Files[i].Data = new byte[inforeader.ReadLongBE()];
flag = inforeader.ReadIntBE();
Files[i].Name = inforeader.ReadStringToNull();
}
// Read Directories
BlockReader blockreader = new BlockReader(blockinfos, reader);
for (int i = 0; i < filecount; i++)
{
blockreader.Seek((int)fileoffsets[i]);
blockreader.ReadBytes(Files[i].Data, 0, Files[i].Data.Length);
}
}