private static Session ReadSession(BinaryReader reader, int length)
{
List <DateTime> mapReadingList = null;
Route route = null;
HandleCollection handles = null;
LongLat projectionOrigin = null;
LapCollection laps = null;
var startPos = reader.BaseStream.Position;
SessionInfo sessionInfo = null;
DateTime lastTime;
while (reader.BaseStream.Position < startPos + length)
{
var tag = (Tags)reader.ReadByte();
var tagLength = Convert.ToInt32(reader.ReadUInt32());
switch (tag)
{
case Tags.Route:
var attributes = reader.ReadUInt16();
var extraWaypointAttributesLength = reader.ReadUInt16();
var routeSegments = new List <RouteSegment>();
var segmentCount = reader.ReadUInt32();
lastTime = DateTime.MinValue;
for (var i = 0; i < segmentCount; i++)
{
var rs = new RouteSegment();
var waypointCount = reader.ReadUInt32();
for (var j = 0; j < waypointCount; j++)
{
var w = new Waypoint();
w.LongLat = ReadLongLat(reader);
w.Time = ReadTime(lastTime, reader);
lastTime = w.Time;
if ((attributes & (UInt16)WaypointAttribute.HeartRate) == (UInt16)WaypointAttribute.HeartRate)
{
w.HeartRate = reader.ReadByte();
}
if ((attributes & (UInt16)WaypointAttribute.Altitude) == (UInt16)WaypointAttribute.Altitude)
{
w.Altitude = reader.ReadInt16();
}
reader.BaseStream.Position += extraWaypointAttributesLength; // for forward compatibility
rs.Waypoints.Add(w);
}
routeSegments.Add(rs);
}
route = new Route(routeSegments);
break;
case Tags.Handles:
handles = new HandleCollection();
var handleCount = reader.ReadUInt32();
var handleMarkerDrawer = SessionSettings.CreateDefaultMarkerDrawers()[MarkerType.Handle];
for (var i = 0; i < handleCount; i++)
{
var handle = new Handle();
// transformation matrix
handle.TransformationMatrix = new GeneralMatrix(3, 3);
for (var j = 0; j < 9; j++)
{
handle.TransformationMatrix.SetElement(j / 3, j % 3, reader.ReadDouble());
}
// parameterized location
var segmentIndex = Convert.ToInt32(reader.ReadUInt32());
var value = reader.ReadDouble();
handle.ParameterizedLocation = new ParameterizedLocation(segmentIndex, value);
// pixel location
handle.Location = new PointD(reader.ReadDouble(), reader.ReadDouble());
// type
handle.Type = (Handle.HandleType)reader.ReadInt16();
// use default marker drawer
handle.MarkerDrawer = handleMarkerDrawer;
handles.Add(handle);
}
break;
case Tags.ProjectionOrigin:
projectionOrigin = ReadLongLat(reader);
break;
case Tags.Laps:
laps = new LapCollection();
var lapCount = reader.ReadUInt32();
for (var i = 0; i < lapCount; i++)
{
var lap = new Lap();
lap.Time = DateTime.FromBinary(reader.ReadInt64());
lap.LapType = (LapType)reader.ReadByte();
laps.Add(lap);
}
break;
case Tags.SessionInfo:
sessionInfo = new SessionInfo();
sessionInfo.Person = new SessionPerson();
sessionInfo.Person.Name = ReadString(reader);
sessionInfo.Person.Club = ReadString(reader);
sessionInfo.Person.Id = reader.ReadUInt32();
sessionInfo.Description = ReadString(reader);
// when more fields are added, check so that tagLength is not passed
break;
case Tags.MapReadingInfo:
mapReadingList = new List <DateTime>();
lastTime = DateTime.MinValue;
var startPosition = reader.BaseStream.Position;
while (reader.BaseStream.Position - startPosition < tagLength)
{
var time = ReadTime(lastTime, reader);
mapReadingList.Add(time);
lastTime = time;
}
break;
default:
reader.BaseStream.Position += tagLength;
break;
}
}
if (mapReadingList != null && route != null)
{
route = new Route(Route.AddMapReadingWaypoints(route.Segments, mapReadingList));
}
var session = new Session(
route,
laps,
new Size(0, 0),
handles != null && handles.Count > 0 ? handles[0].TransformationMatrix : null,
projectionOrigin,
new SessionSettings());
if (handles != null)
{
foreach (var h in handles)
{
session.AddHandle(h);
}
}
if (sessionInfo != null)
{
session.SessionInfo = sessionInfo;
}
return(session);
}
