private void LoadFromFile(string filename)
{
// We copy all the data into a memory stream to allow seeking
using (var s = new OptionalGzipStream(filename))
{
s.CopyTo(_stream);
_stream.Seek(0, SeekOrigin.Begin);
}
// We parse the header
Header.Parse(_stream);
// And the GD3 tag, if present
if (Header.Gd3Offset != 0)
{
Gd3Tag.Parse(_stream, Header.Gd3Offset);
}
}
public static Gd3Tag LoadFromVgm(string filename)
{
// Open the stream
using (var s = new OptionalGzipStream(filename))
using (var r = new BinaryReader(s, Encoding.ASCII))
{
r.ReadBytes(0x14);
var offset = r.ReadUInt32() + 0x14;
if (offset == 0)
{
// No tag
return(null);
}
if (offset > s.Length - 8 - 11 * 2)
{
throw new InvalidDataException("Not enough room in file for GD3 offset");
}
var result = new Gd3Tag();
result.Parse(s, offset);
return(result);
}
}