//the reader must currently be at the start of the encoded block. the first [segmentOffset] bytes of the block will be discarded.
internal static byte[] GetResourceData(EndianReader reader, CacheResourceCodec codec, int maxLength, int segmentOffset, int compressedSize, int decompressedSize)
{
var segmentLength = Math.Min(maxLength, decompressedSize - segmentOffset);
if (codec == CacheResourceCodec.Uncompressed || compressedSize == decompressedSize)
{
reader.Seek(segmentOffset, SeekOrigin.Current);
return(reader.ReadBytes(segmentLength));
}
else if (codec == CacheResourceCodec.Deflate)
{
using (var ds = new DeflateStream(reader.BaseStream, CompressionMode.Decompress))
using (var reader2 = new BinaryReader(ds))
{
reader2.ReadBytes(segmentOffset);
return(reader2.ReadBytes(segmentLength));
}
}
else if (codec == CacheResourceCodec.LZX)
{
var compressed = reader.ReadBytes(compressedSize);
var decompressed = new byte[decompressedSize];
int startSize = compressedSize;
int endSize = decompressedSize;
int decompressionContext = 0;
XCompress.XMemCreateDecompressionContext(XCompress.XMemCodecType.LZX, 0, 0, ref decompressionContext);
XCompress.XMemResetDecompressionContext(decompressionContext);
XCompress.XMemDecompressStream(decompressionContext, decompressed, ref endSize, compressed, ref startSize);
XCompress.XMemDestroyDecompressionContext(decompressionContext);
if (decompressed.Length == segmentLength)
{
return(decompressed);
}
var result = new byte[segmentLength];
Array.Copy(decompressed, segmentOffset, result, 0, result.Length);
return(result);
}
else if (codec == CacheResourceCodec.UnknownDeflate) //experimental
{
using (var ms = new MemoryStream())
using (var mw = new BinaryWriter(ms))
using (var ds = new DeflateStream(reader.BaseStream, CompressionMode.Decompress))
using (var reader2 = new BinaryReader(ds))
{
for (int i = 0; i < segmentLength;)
{
bool flag;
var blockSize = ReadSpecialInt(reader2, out flag);
if (flag)
{
reader2.ReadBytes(2);
}
mw.Write(reader2.ReadBytes(blockSize));
i += blockSize;
}
return(ms.ToArray());
}
}
else
{
throw new NotSupportedException("Unknown Resource Codec");
}
}
public override byte[] GetRawFromID(int ID, int DataLength)
{
EndianReader er;
string fName = "";
var Entry = zone.RawEntries[ID & ushort.MaxValue];
if (Entry.SegmentIndex == -1)
{
throw new InvalidDataException("Raw data not found.");
}
var Loc = play.Segments[Entry.SegmentIndex];
//if (Loc.SoundRawIndex != -1)
// return GetSoundRaw(ID);
int index = (Loc.OptionalPageIndex2 != -1) ? Loc.OptionalPageIndex2 : (Loc.OptionalPageIndex != -1) ? Loc.OptionalPageIndex : Loc.RequiredPageIndex;
int locOffset = (Loc.OptionalPageOffset2 != -1) ? Loc.OptionalPageOffset2 : (Loc.OptionalPageOffset != -1) ? Loc.OptionalPageOffset : Loc.RequiredPageOffset;
if (index == -1 || locOffset == -1)
{
throw new InvalidDataException("Raw data not found.");
}
if (play.Pages[index].RawOffset == -1)
{
index = Loc.RequiredPageIndex;
locOffset = Loc.RequiredPageOffset;
}
var Pool = play.Pages[index];
if (Pool.CacheIndex != -1)
{
fName = play.SharedCaches[Pool.CacheIndex].FileName;
fName = fName.Substring(fName.LastIndexOf('\\'));
fName = FilePath + fName;
if (fName == Filename)
{
er = Reader;
}
else
{
FileStream fs = new FileStream(fName, FileMode.Open, FileAccess.Read);
er = new EndianReader(fs, EndianFormat.Big);
}
}
else
{
er = Reader;
}
er.SeekTo(int.Parse(versionNode.ChildNodes[0].Attributes["rawTableOffset"].Value));
int offset = Pool.RawOffset + er.ReadInt32();
er.SeekTo(offset);
byte[] compressed = er.ReadBytes(Pool.CompressedSize);
byte[] decompressed = new byte[Pool.DecompressedSize];
if (Version >= DefinitionSet.Halo4Retail)
{
int decompressionContext = 0;
XCompress.XMemCreateDecompressionContext(XCompress.XMemCodecType.LZX, 0, 0, ref decompressionContext);
XCompress.XMemResetDecompressionContext(decompressionContext);
XCompress.XMemDecompressStream(decompressionContext, decompressed, ref Pool.DecompressedSize, compressed, ref Pool.CompressedSize);
XCompress.XMemDestroyDecompressionContext(decompressionContext);
}
else
{
BinaryReader BR = new BinaryReader(new DeflateStream(new MemoryStream(compressed), CompressionMode.Decompress));
decompressed = BR.ReadBytes(Pool.DecompressedSize);
BR.Close();
BR.Dispose();
}
byte[] data = new byte[(DataLength != -1) ? DataLength : (Pool.DecompressedSize - locOffset)];
int length = data.Length;
if (length > decompressed.Length)
{
length = decompressed.Length;
}
Array.Copy(decompressed, locOffset, data, 0, length);
if (er != Reader)
{
er.Close();
er.Dispose();
}
return(data);
}
