public static void UnpackData(dynamic file, byte[] data)
{
BinaryReader reader = new BinaryReader(new MemoryStream(data));
List <byte> result = new List <byte>();
for (int i = 0; i < Math.Ceiling((double)file.DataLength / 2048); i++)
{
if (!reader.ReadBytes(12).SequenceEqual(syncPattern))
{
throw new ArgumentException($"Synchronization pattern not found. Incorrect file type. {file.Name} Segment: {i}");
}
reader.BaseStream.Seek(4, SeekOrigin.Current); // Address and Mode
reader.BaseStream.Seek(1, SeekOrigin.Current); // File Number
reader.BaseStream.Seek(1, SeekOrigin.Current); // Channel Number
var flags = new SubheaderFlags(reader.ReadByte());
reader.BaseStream.Seek(1, SeekOrigin.Current); // Coding info
reader.BaseStream.Seek(4, SeekOrigin.Current); // skip copy of subheader
int form = flags.Form2 ? 1 : 0;
result.AddRange(reader.ReadBytes(2048 + form * 0x114));
reader.BaseStream.Seek(4, SeekOrigin.Current); // Error detection
reader.BaseStream.Seek(276 - form * 276, SeekOrigin.Current); // Error correction
}
if (file.Name.Contains(".OV_"))
{
file.Data = BPE.Decompress(result.ToArray());
}
else
{
file.Data = result.ToArray();
}
reader.Close();
}
public void GetData(BinaryReader reader)
{
reader.BaseStream.Seek(extentLocation * 2352, SeekOrigin.Begin); // get first data segment, rest is writen sequentially
data = new byte[dataLength];
for (int i = 0; i < Math.Ceiling((double)dataLength / 2048); i++) // get number of segments
{
if (!reader.ReadBytes(12).SequenceEqual(syncPattern))
{
throw new ArgumentException($"Synchronization pattern not found. Incorrect file type. {name} Segment: {i}");
}
reader.ReadBytes(12);
for (int j = 0; j < 2048; j++) // read up to 2048 bytes of each segment
{
if (j + i * 2048 > dataLength - 1)
{
break;
}
else
{
data[j + i * 2048] = reader.ReadByte();
}
}
reader.ReadBytes(4); // error detection
reader.ReadBytes(276); // error correction
}
if (name.Contains(".OV_"))
{
decompressedData = BPE.Decompress(data);
}
}
