/// <inheritdoc />
public override void StartDecode()
{
// TODO: This is a bit memory hungry, because all data gets read in first, but the implementation is only suited for statistical analysis now and
// not for replaying large data sets. Can be improved later.
MemoryStream ms = new MemoryStream();
foreach (var fileToRead in _filesToRead)
{
using (StreamReader sr = File.OpenText(fileToRead))
{
string? line = sr.ReadLine();
Encoding raw = new Raw8BitEncoding();
while (line != null)
{
if (line.Contains("|"))
{
var splits = line.Split(new char[]
{
'|'
}, StringSplitOptions.None);
line = splits[2]; // Raw message
}
// Pack data into memory stream, from which the parser will get it again
byte[] bytes = raw.GetBytes(line + "\r\n");
ms.Write(bytes, 0, bytes.Length);
line = sr.ReadLine();
}
}
}
ms.Position = 0;
ManualResetEvent ev = new ManualResetEvent(false);
var parser = new NmeaParser(InterfaceName, ms, null);
parser.SuppressOutdatedMessages = false; // parse all incoming messages, ignoring any timing
parser.OnNewSequence += ForwardDecoded;
parser.OnParserError += (source, s, error) =>
{
if (error == NmeaError.PortClosed)
{
ev.Set();
}
};
parser.StartDecode();
ev.WaitOne(); // Wait for end of file
parser.StopDecode();
ms.Dispose();
}
/// <summary>
/// Creates a new instance of the NmeaParser, taking an input and an output stream
/// </summary>
/// <param name="interfaceName">Friendly name of this interface (used for filtering and eventually logging)</param>
/// <param name="dataSource">Data source (may be connected to a serial port, a network interface, or whatever). It is recommended to use a blocking Stream,
/// to prevent unnecessary polling</param>
/// <param name="dataSink">Optional data sink, to send information. Can be null, and can be identical to the source stream</param>
public NmeaParser(String interfaceName, Stream dataSource, Stream?dataSink)
: base(interfaceName)
{
_encoding = new Raw8BitEncoding();
_dataSource = dataSource ?? throw new ArgumentNullException(nameof(dataSource));
_reader = new StreamReader(_dataSource, _encoding); // Nmea sentences are text
_dataSink = dataSink;
_lock = new object();
_outQueue = new();
_outEvent = new AutoResetEvent(false);
ExclusiveTalkerId = TalkerId.Any;
_ioExceptionOnSend = null;
SuppressOutdatedMessages = true;
LastPacketTime = DateTimeOffset.UtcNow;
}
