Gst.Buffer buffer = null;
public Gst.Buffer Buffer {
  get {
    return buffer;
  }
}

[DllImport("libgstbase-0.10.dll", CallingConvention = CallingConvention.Cdecl)]
static extern IntPtr gst_byte_reader_new_from_buffer(IntPtr buffer);

public ByteReader (Gst.Buffer buffer)
{
  Raw = gst_byte_reader_new_from_buffer(buffer == null ? IntPtr.Zero : buffer.Handle);
  this.buffer = buffer;
}

[DllImport ("libgstbase-0.10.dll", CallingConvention = CallingConvention.Cdecl) ]
static extern bool gst_byte_reader_peek_data (IntPtr raw, uint size, out IntPtr val);

public bool PeekData (uint size, out byte[] val) {
  IntPtr raw_ret;

  bool ret = gst_byte_reader_peek_data (Handle, size, out raw_ret);

  if (!ret || raw_ret == IntPtr.Zero) {
    val = null;
  } else {
    val = new byte[size];
    Marshal.Copy (raw_ret, val, 0, (int) size);
  }

  return ret;
}

[DllImport ("libgstbase-0.10.dll", CallingConvention = CallingConvention.Cdecl) ]
static extern bool gst_byte_reader_get_data (IntPtr raw, uint size, out IntPtr val);

public bool GetData (uint size, out byte[] val) {
  IntPtr raw_ret;

  bool ret = gst_byte_reader_get_data (Handle, size, out raw_ret);

  if (!ret || raw_ret == IntPtr.Zero) {
    val = null;
  } else {
    val = new byte[size];
    Marshal.Copy (raw_ret, val, 0, (int) size);
  }

  return ret;
}