public BeatmapInfo(string filename)
{
List <Note> notes;
List <LongNote> lns;
// Load, and parse.
if (File.Exists(filename))
{
if (filename.Split('.')[filename.Split('.').Length - 1] != "osu")
{
throw new InvalidBeatmapException("Unknown file format.");
}
Data = MetadataParser.Parse(filename);
HitObjectParser.Parse(filename, out notes, out lns, Data.Keys);
}
else
{
throw new FileNotFoundException();
}
// Calculate densities.
JenksDensity = DensityCalculator.GetJenksDensity(ref notes, ref lns, Data.Keys);
JenksSpeed = DensityCalculator.GetJenksSpeed(ref notes, ref lns);
// Copy data.
Notes = notes;
LNs = lns;
}