private ChunkDescriptor ReadChunkDescriptor()
{
UInt32 manifestSize = this.ReadUInt32BE();
long baseOffset = this.BaseStream.Position;
byte[] manifestContent = this.ReadBytes((int)manifestSize);
ChunkDescriptor descriptor = new ChunkDescriptor();
using (BinaryReader memoryReader = new BinaryReader(new MemoryStream(manifestContent)))
{
descriptor.Magic = memoryReader.ReadBytes(4);
descriptor.Offset = baseOffset - 4;
if (!descriptor.Magic.SequenceEqual(new byte[] { 0x9D, 0x79, 0x8E, 0xD5 }))
{
throw new InvalidDataException();
}
descriptor.TotalFiles = memoryReader.ReadUInt32BE();
descriptor.TotalFilesWithName = memoryReader.ReadUInt32BE();
descriptor.TotalFilesWithId = memoryReader.ReadUInt32BE();
descriptor.TotalFilesWithMetaEntries = memoryReader.ReadUInt32BE();
descriptor.OffsetFileNamesBlock = memoryReader.ReadUInt32BE();
descriptor.OffsetMetaEntriesBlock = memoryReader.ReadUInt32BE();
descriptor.MetaEntriesSize = memoryReader.ReadUInt32BE();
for (int i = 0; i < descriptor.TotalFiles; i++)
{
ChunkDescriptorPair pair = new ChunkDescriptorPair();
pair.Hash = memoryReader.ReadBytes(20);
descriptor.Pairs.Add(pair);
}
List <byte[]> chunkIds = new List <byte[]>();
if (descriptor.TotalFilesWithMetaEntries == 0 && descriptor.TotalFilesWithId != 0)
{
for (int i = 0; i < descriptor.TotalFilesWithName; i++)
{
descriptor.EbxDescriptors.Add(ReadIntermediateDescriptor(baseOffset, memoryReader));
}
for (int i = 0; i < descriptor.TotalFilesWithId; i++)
{
descriptor.DataDescriptors.Add(ReadIntermediateDescriptor(baseOffset, memoryReader));
}
for (int i = 0; i < descriptor.TotalFilesWithId; i++)
{
var resourceId = memoryReader.ReadUInt32BE();
}
for (int i = 0; i < descriptor.TotalFilesWithId; i++)
{
var unknown1 = memoryReader.ReadUInt64BE();
var unknown2 = memoryReader.ReadUInt64BE();
}
for (int i = 0; i < descriptor.TotalFilesWithId; i++)
{
chunkIds.Add(memoryReader.ReadBytes(8));
}
}
memoryReader.BaseStream.Seek(descriptor.OffsetFileNamesBlock, SeekOrigin.Begin);
int nameStartOffset = 0;
for (int i = 0; i < descriptor.TotalFilesWithName; i++)
{
descriptor.Pairs[i].Name = memoryReader.ReadNullTerminatedString().Replace('/', '\\');
var compositeDescriptor = new CompositeResourceDescriptor();
compositeDescriptor.Name = descriptor.Pairs[i].Name;
compositeDescriptor.Ebx = ConvertIntermediateResourceToFinalResource(descriptor.EbxDescriptors.FirstOrDefault(ebx => ebx.NameOffset == nameStartOffset), compositeDescriptor);
compositeDescriptor.Resource = ConvertIntermediateResourceToFinalResource(descriptor.DataDescriptors.FirstOrDefault(ebx => ebx.NameOffset == nameStartOffset), compositeDescriptor);
descriptor.ResourceDescriptors.Add(compositeDescriptor);
nameStartOffset += compositeDescriptor.Name.Length + 1;
}
if (descriptor.TotalFilesWithMetaEntries == 0 && descriptor.TotalFilesWithId != 0)
{
for (int i = 0; i < descriptor.TotalFilesWithId; i++)
{
descriptor.Pairs[(int)descriptor.TotalFilesWithName + i].Name = BitConverter.ToString(chunkIds[i]).Replace("-", "");
}
}
}
return(descriptor);
}
private ResourceDescriptor ConvertIntermediateResourceToFinalResource(IntermediateResourceDescriptor intermediateResourceDescriptor, CompositeResourceDescriptor compositeDescriptor)
{
if (intermediateResourceDescriptor == null)
{
return(null);
}
intermediateResourceDescriptor.FinalResourceDescriptor = compositeDescriptor;
return(new ResourceDescriptor()
{
Offset = intermediateResourceDescriptor.FileOffset,
Size = intermediateResourceDescriptor.Size
});
}
