internal static MidiFile Load(string filePath)
{
try
{
MMSong mmSong = JsonExtensions.DeserializeFromFileCompressed <MMSong>(filePath);
if (mmSong.schemaVersion < 1 && mmSong.schemaVersion > 2)
{
throw new FileFormatException("Error: This mmsong file format is not understood.");
}
// For now, just play the first available song.
// if (mmSong.songs.Count != 1) throw new FileFormatException("Error: BMP currently only supports mmsong files with 1 song in them.");
MMSong.Song song = mmSong.songs[0];
MidiFile sequence = new MidiFile();
sequence.Chunks.Add(new TrackChunk());
sequence.TimeDivision = new TicksPerQuarterNoteTimeDivision(600);
using (TempoMapManager tempoMapManager = sequence.ManageTempoMap()) tempoMapManager.SetTempo(0, Tempo.FromBeatsPerMinute(100));
foreach (MMSong.Bard bard in song.bards)
{
List <Note> notes = new List <Note>();
bool failure = false;
switch (bard.instrument)
{
case Instrument.Cymbal:
case Instrument.Trumpet:
case Instrument.Trombone:
case Instrument.Horn:
case Instrument.Tuba:
case Instrument.Saxophone:
case Instrument.Violin:
case Instrument.Viola:
case Instrument.Cello:
case Instrument.DoubleBass:
bard.sequence = bard.sequence.ToDictionary(
x => x.Key + 2,
x => x.Value);
break;
default:
break;
}
if (bard.sequence.Count % 2 == 0)
{
long lastTime = 0;
int lastNote = 254;
foreach (KeyValuePair <long, int> sEvent in bard.sequence)
{
if (!failure)
{
if (lastNote == 254)
{
if (sEvent.Value <= 60 && sEvent.Value >= 24 && ((sEvent.Key * 25 % 100) == 50 || (sEvent.Key * 25) % 100 == 0))
{
lastNote = sEvent.Value + 24;
lastTime = sEvent.Key * 25;
}
else
{
failure = true;
}
}
else
{
if (sEvent.Value == 254)
{
long dur = (sEvent.Key * 25) - lastTime;
notes.Add(new Note((SevenBitNumber)lastNote, dur, lastTime)
{
Channel = (FourBitNumber)14,
Velocity = (SevenBitNumber)(int)127,
OffVelocity = (SevenBitNumber)(int)0
});
lastNote = 254;
lastTime = sEvent.Key * 25;
}
else
{
failure = true;
}
}
}
}
}
else
{
failure = true;
}
if (failure)
{
throw new FileFormatException("Error: This mmsong file is corrupted");
}
TrackChunk currentChunk = new TrackChunk(new SequenceTrackNameEvent(bard.instrument.ToString()));
currentChunk.AddNotes(notes);
notes = null;
sequence.Chunks.Add(currentChunk);
currentChunk = null;
}
using (var manager = new TimedEventsManager(sequence.GetTrackChunks().First().Events))
manager.Events.Add(new TimedEvent(new MarkerEvent(), (sequence.GetDuration <MetricTimeSpan>().TotalMicroseconds / 1000) + 100));
return(sequence);
}
catch (Exception ex)
{
throw ex;
}
}