public static MidiFileInfo Parse(Stream reader)
{
var info = new MidiFileInfo();
ParseHeaderChunk(reader, info);
var tracks = new List <MidiChunkPointer>();
while (reader.Position < reader.Length)
{
ParseTrackChunk(reader, tracks);
}
info.Tracks = tracks.ToArray();
info.TrackCount = tracks.Count;
return(info);
}
static void ParseHeaderChunk(Stream reader, MidiFileInfo info)
{
AssertText(reader, "MThd");
uint length = (uint)ReadInt32(reader);
if (length != 6)
{
throw new Exception("Header chunk size isn't 6");
}
info.Format = ReadInt16(reader);
ReadInt16(reader);
info.Division = ReadInt16(reader);
if (info.Format == 2)
{
throw new Exception("Midi type 2 not supported");
}
if (info.Division < 0)
{
throw new Exception("Division < 0 not supported");
}
}