public static bool TryParse(List <MidiEvent> messages, BaseNoteRetriever retriever, out Chord chord)
{
if (messages == null || retriever == null)
{
chord = null;
return(false);
}
chord = new Chord(messages,
messages
.Where(x => x.MidiMessage is ChannelMessage)
.Select(x => x.MidiMessage as ChannelMessage)
.Where(x => x.Command == ChannelCommand.NoteOn && retriever.ValidNoteId(x))
.Select(x => retriever.RetrieveNote(x)).ToList());
return(true);
}
public static List <Chord> RetrieveChords(IEnumerable <MidiEvent> track, BaseNoteRetriever retriever)
{
track.NullCheck();
var individualMidiEvents = track.ToList();
var indexes = Chord.GetIndexes(individualMidiEvents);
var pureChords = Chord.GetAllFullChords(individualMidiEvents, indexes);
var start = individualMidiEvents.FindIndex(x => x.MidiMessage is ChannelMessage);
var last = individualMidiEvents.FindLastIndex(x => x.MidiMessage is ChannelMessage);
List <Chord> chords = new List <Chord>();
for (int pureChordCounter = 0; start < last && pureChordCounter < pureChords.Count; start++)
{
if (start < pureChords[pureChordCounter].Item1)
{
var pair = Chord.FindPairCount(start, pureChords[pureChordCounter].Item2, individualMidiEvents);
if (pair.HasValue)
{
Chord outChord;
if (Chord.TryParse(individualMidiEvents.GetRange(start, pair.Value - start + 1), retriever, out outChord))
{
chords.Add(outChord);
}
}
}
else
{
var item = pureChords[pureChordCounter];
Chord outChord;
if (Chord.TryParse(individualMidiEvents.GetRange(item.Item1, item.Item2 - item.Item1 + 1), retriever, out outChord))
{
chords.Add(outChord);
}
start = item.Item2;
pureChordCounter++;
}
}
return(chords.ToList());
}