public Int32?GetInt32(int fieldDefinitionNumber)
{
var field = GetFieldByFieldDefinitionNumber(fieldDefinitionNumber);
return(field == null
? (Int32?)null
: FITUtil.ChangeEndianness(BitConverter.ToInt32(data, field.Position), definitionMessage.Architecture));
}
public DefinitionMessage(BinaryReader dataReader)
{
dataReader.ReadByte(); // reserved
Architecture = dataReader.ReadByte();
GlobalMessageNumber = FITUtil.ChangeEndianness(dataReader.ReadUInt16(), Architecture);
var numberOfFields = dataReader.ReadByte();
Fields = new Field[numberOfFields];
for (var i = 0; i < numberOfFields; i++)
{
Fields[i] = new Field()
{
FieldDefinitionNumber = dataReader.ReadByte(),
Size = dataReader.ReadByte(),
BaseType = dataReader.ReadByte(),
Position = DataLength
};
DataLength += Fields[i].Size;
}
}
public Data(BinaryReader reader, UInt32 dataSize)
{
Waypoints = new List <FITWaypoint>();
Laps = new List <FITLap>();
var bytes = reader.ReadBytes((int)dataSize);
using (var stream = new MemoryStream(bytes))
{
using (var dataReader = new BinaryReader(stream))
{
var recordHeader = new RecordHeader(dataReader);
if (!recordHeader.IsDefinitionMessage)
{
throw new Exception("First record is not a definition message.");
}
var def = new DefinitionMessage(dataReader);
if (def.GlobalMessageNumber != (ushort)MesgNum.file_id)
{
throw new Exception("First record's global message number is not file_id.");
}
recordHeader = new RecordHeader(dataReader);
if (recordHeader.IsDefinitionMessage)
{
throw new Exception("Encountered a definition message, but expected a data message.");
}
var d = new DataMessage(dataReader, def);
var fileType = d.GetByte(0);
if (fileType != 4)
{
throw new Exception("Not a FIT activity file.");
}
var messageTypeTranslator = new Dictionary <byte, DefinitionMessage>();
UInt32 lastTimestamp = 0;
while (dataReader.BaseStream.Position < dataReader.BaseStream.Length)
{
recordHeader = new RecordHeader(dataReader);
if (recordHeader.IsDefinitionMessage)
{
def = new DefinitionMessage(dataReader);
FITUtil.AddOrReplace(messageTypeTranslator, recordHeader.LocalMessageType, def);
}
else
{
var currentDef = messageTypeTranslator[recordHeader.LocalMessageType];
d = new DataMessage(dataReader, currentDef);
var timestamp = d.GetUInt32(253);
if (timestamp == null)
{
timestamp = FITUtil.AddCompressedTimestamp(lastTimestamp, recordHeader.TimeOffset);
}
var time = FITUtil.ToDateTime(timestamp.Value);
var gmn = currentDef.GlobalMessageNumber;
if (gmn == (byte)MesgNum.record)
{
var lat = d.GetInt32(0);
var lng = d.GetInt32(1);
var alt = d.GetUInt16(2);
var hr = d.GetByte(3);
if (lng != null && lng != invalidInt32 && lat != null && lat != invalidInt32)
{
Waypoints.Add(new FITWaypoint()
{
Time = time,
Latitude = positionFactor * lat.Value,
Longitude = positionFactor * lng.Value,
Altitude = alt == null || alt == invalidUInt16 ? (double?)null : (double)alt.Value / 5 - 500,
HeartRate = hr == null || hr == invalidByte ? null : hr
});
}
}
else if (gmn == (byte)MesgNum.lap)
{
Laps.Add(new FITLap()
{
Time = time
});
}
else if (gmn == 22)
{
}
lastTimestamp = timestamp.Value;
}
}
}
}
}
