public static void Serialize(BundleOptions options, Stream stream)
{
using (var writer = new EndianBinaryWriter(stream, UnityEndianHelper.UnityDefaultEndian)) {
// bundle signature
writer.WriteAsciiStringAndNull(BundleFileSignature.Raw);
// bundle format
writer.Write(3);
writer.WriteAsciiStringAndNull(PlayerVersion);
writer.WriteAsciiStringAndNull(EngineVersion);
const int bundleHeaderSize = 0x70;
const int assetHeaderSize = 0x10;
int assetDataOffset;
var singleAssetFile = GetAssetFileIndependentData(options, out assetDataOffset);
assetDataOffset += bundleHeaderSize + assetHeaderSize;
var totalBundleSize = bundleHeaderSize + assetHeaderSize + singleAssetFile.Length;
writer.Write(totalBundleSize);
writer.Write((ushort)0);
// base offset; Raw file, no LZMA compression, so it is fixed.
writer.Write((ushort)0x3c);
// Dummy int
writer.Write(1);
// LZMA chunks
writer.Write(1);
// LZMA compressed size
writer.Write(totalBundleSize - 0x3c);
// LZMA stream size
writer.Write(totalBundleSize - 0x3c);
// some 'dummy' value (?)
writer.Write(totalBundleSize);
writer.AlignStream(4);
// Dunno
writer.Write(new byte[] { 0x00, 0x00, 0x34, 0x00 });
// Now we should be at 0x3c
// Asset file count
writer.Write(1);
// Asset file name
var cabName = GenerateFakeHexHash(32);
writer.WriteAsciiStringAndNull("CAB-" + cabName);
// Asset file offset
writer.Write(0x34);
// first asset file offset = 0x70 = base offset + asset offset
writer.Write(assetHeaderSize + singleAssetFile.Length);
writer.AlignStream(4);
// Now we should be at 0x70
// Write asset header
// table size
writer.Write(0x08ba);
// data end
writer.Write(assetHeaderSize + singleAssetFile.Length);
// format signature; 0xf for 5.1.2
writer.Write(0xf);
// data offset
writer.Write(assetDataOffset - bundleHeaderSize);
writer.Write(singleAssetFile);
}
}
