public async Task <byte[]> ReadFile(FileRecord record)
{
var isCompressed = (Header.ArchiveFlags & BSA105ArchiveFlags.CompressedArchive) == BSA105ArchiveFlags.CompressedArchive;
if ((isCompressed && !record.CompressionBit) || (!isCompressed && record.CompressionBit))
{
return(await ReadCompressedFile(record));
}
ArchiveStream.Seek(record.DataOffset, SeekOrigin.Begin);
var fileBytes = new byte[record.Size];
await ArchiveStream.ReadAsync(fileBytes, 0, fileBytes.Length);
return(fileBytes);
}
public async Task <byte[]> ReadCompressedFile(FileRecord record)
{
ArchiveStream.Seek(record.DataOffset, SeekOrigin.Begin);
var reader = new BinaryReader(ArchiveStream);
var realSize = reader.ReadUInt32();
var source = new byte[record.Size - 4];
await ArchiveStream.ReadAsync(source, 0, source.Length);
using (var memory = new MemoryStream(source))
{
var output = LZ4Stream.Decode(memory);
var targetBytes = new byte[realSize];
await output.ReadAsync(targetBytes, 0, targetBytes.Length);
return(targetBytes);
}
}