public MidiMappingRecord[] FindMatchesInBuffer(Pitch[] buffer)
{
var results = new List<MidiMappingRecord>();
var events = buffer.Cast<Pitch?>().ToArray();
// Process chords first. Try to capture a chord with as many notes as possible.
// This is O(scary), but seems quick enough in practice. (c) StackOverflow #184618
foreach (var mapping in chordMappingsOrdered)
{
bool isChordComplete = mapping.Trigger.Pitches.All(p => events.Any(e => e.HasValue && e == p));
if (isChordComplete)
{
// Exclude matched notes from further processing.
for (int i = 0; i < events.Length; i++)
{
var pitch = events[i].Value;
if (mapping.Trigger.Pitches.Any(p => p == pitch))
{
events[i] = null;
}
}
results.Add(mapping);
}
}
// Process remaining single notes.
foreach (var e in events.Where(e => e.HasValue))
{
results.AddRange(FindSingleNoteMatches(e.Value));
}
return results.ToArray();
}