public void TestAddNamedTrack()
{
var manualMidi = new MidiEventCollection(1, 200);
var noteEvent = new NoteOnEvent(0, 1, 1, 1, 1);
const string trackName = "name";
var trackNameEvent = new TextEvent(trackName, MetaEventType.SequenceTrackName, 0);
var endTrackEvent = new MetaEvent(MetaEventType.EndTrack, 0, noteEvent.OffEvent.AbsoluteTime);
var track = manualMidi.AddTrack();
track.Add(trackNameEvent);
track.Add(noteEvent);
track.Add(noteEvent.OffEvent);
track.Add(endTrackEvent);
var extensionMidi = new MidiEventCollection(1, 200);
var events = new MidiEvent[] { noteEvent, noteEvent.OffEvent };
extensionMidi.AddNamedTrack(trackName, events);
MidiAssert.Equal(manualMidi, extensionMidi);
// Assert events (not name / end) are the same objects
var manualTrack = manualMidi[0];
var extensionTrack = extensionMidi[0];
for (var e = 1; e < manualTrack.Count - 1; e++)
{
Assert.That(extensionTrack[e], Is.SameAs(manualTrack[e]));
}
}
public void AddVenueTrack(MidiEventCollection midi)
{
var existingTrack = midi.FindTrackNumberByName(TrackName.Venue.ToString());
if (existingTrack != -1)
{
return;
}
midi.AddNamedTrack(TrackName.Venue.ToString());
}
public void ConsolidateTracks(MidiEventCollection midi)
{
// find all of the names
var nameCounts = new Dictionary <string, int>();
for (var t = 0; t < midi.Tracks; t++)
{
var names = midi[t].
OfType <TextEvent>().
Where(e => e.MetaEventType == MetaEventType.SequenceTrackName).
ToList();
if (names.Count > 1)
{
var detail = string.Join(", ", names.Select(n => $"'{n.Text}'"));
throw new InvalidOperationException($"Multiple names {detail} on the same track.");
}
var name = names.FirstOrDefault()?.Text ?? "";
int count;
nameCounts.TryGetValue(name, out count);
nameCounts[name] = count + 1;
}
/* For all of the names that appear on more than one track
* find all the other tracks that have this name and consolidate them.
* We iterate multiple times because the track numbers will change every
* time tracks are consolidated. */
foreach (var kvp in nameCounts.Where(kvp => kvp.Value > 1))
{
var name = kvp.Key;
var list = new List <MidiEvent>();
// iterate in reverse so track numbers don't change mid iteration
for (var t = midi.Tracks - 1; t >= 0; t--)
{
if (!midi[t].OfType <TextEvent>().Any(e => e.IsSequenceTrackName() && e.Text == name))
{
continue;
}
var events = midi[t].Where(e => !MidiEvent.IsEndTrack(e) && !e.IsSequenceTrackName());
list.AddRange(events);
midi.RemoveTrack(t);
}
midi.AddNamedTrack(name, list.OrderBy(e => e.AbsoluteTime));
}
}
public void ConvertLastBeatToEnd(MidiEventCollection midi)
{
var beatTrack = midi.GetTrackByName(TrackName.Beat.ToString());
var lastBeatOn = beatTrack.OfType <NoteOnEvent>().OrderBy(e => e.AbsoluteTime).LastOrDefault(MidiEvent.IsNoteOn);
if (lastBeatOn == null)
{
throw new InvalidBeatTrackException($"No notes were found on the {TrackName.Beat} track");
}
var eventsTrack = midi.FindTrackByName(TrackName.Events.ToString());
if (eventsTrack != null)
{
var existingEvent = eventsTrack.FindFirstTextEvent(EventName.End.ToString());
if (existingEvent != null)
{
AddInfo($"{EventName.End} event already exists at {GetBarInfo(midi, existingEvent)}, left last beat in place.");
return;
}
}
else
{
eventsTrack = midi.AddNamedTrack(TrackName.Events.ToString());
}
beatTrack.Remove(lastBeatOn);
beatTrack.Remove(lastBeatOn.OffEvent);
// Fix beat track end
var newLastEvent = beatTrack.OfType <NoteEvent>().OrderBy(e => e.AbsoluteTime).Last();
UpdateTrackEnd(beatTrack, newLastEvent.AbsoluteTime);
eventsTrack.Add(new TextEvent(EventName.End.ToString(), MetaEventType.TextEvent, lastBeatOn.AbsoluteTime));
UpdateTrackEnd(eventsTrack, lastBeatOn.AbsoluteTime);
}
public void ConsolidateTimeTracks(MidiEventCollection midi)
{
// Duplicate events will be ignored, events with the same time
// but other differing properties will not
var allTimeSignatureEvents = new HashSet <TimeSignatureEvent>(new TimeSignatureEventEqualityComparer());
var allTempoEvents = new HashSet <TempoEvent>(new TempoEventEqualityComparer());
for (var t = midi.Tracks - 1; t >= 0; t--)
{
var timeSignatureEvents = midi[t].OfType <TimeSignatureEvent>().ToList();
allTimeSignatureEvents.UnionWith(timeSignatureEvents);
foreach (var midiEvent in timeSignatureEvents)
{
midi[t].Remove(midiEvent);
}
var tempoEvents = midi[t].OfType <TempoEvent>().ToList();
allTempoEvents.UnionWith(tempoEvents);
foreach (var midiEvent in tempoEvents)
{
midi[t].Remove(midiEvent);
}
if (timeSignatureEvents.Any() || tempoEvents.Any())
{
RemoveTrackIfEmpty(midi, t);
}
}
var groupedTimeSignatureEvents = allTimeSignatureEvents.
GroupBy(e => e.AbsoluteTime).
ToList();
var hasConflict = false;
var conflictingTimeSignatures = groupedTimeSignatureEvents.Where(g => g.Count() > 1).ToList();
if (conflictingTimeSignatures.Any())
{
foreach (var conflict in conflictingTimeSignatures)
{
var details = string.Join(", ", conflict.Select(t => $"[{t.TimeSignature}]"));
AddError($"Conflicting signatures {details} at {GetBarInfo(midi, conflict.Key)}");
}
hasConflict = true;
}
var groupedTempoEvents = allTempoEvents.
GroupBy(e => e.AbsoluteTime).
ToList();
var conflictingTempos = groupedTempoEvents.Where(g => g.Count() > 1).ToList();
if (conflictingTempos.Any())
{
foreach (var conflict in conflictingTempos)
{
var details = string.Join(", ", conflict.Select(t => $"[{t.Tempo}]"));
AddError($"Conflicting tempos {details} at {GetBarInfo(midi, conflict.Key)}");
}
hasConflict = true;
}
if (hasConflict)
{
throw new InvalidOperationException("Conflicting time signature/tempo events");
}
var events = new List <MidiEvent>();
events.AddRange(groupedTimeSignatureEvents.Select(g => g.First()));
events.AddRange(groupedTempoEvents.Select(g => g.First()));
midi.AddNamedTrack(TrackName.TempoMap.ToString(), events);
}
/// <summary>
/// Used to specify TextEvents from DAWs/Midi creators that can only use Track Names.
/// A SequenceTrackName event is used as the Text, and a NoteOn event is used as the time.
///
/// Upon completion, there will be a single EVENTS track in the required format.
/// </summary>
public void ProcessEventTracks(MidiEventCollection midi, IEnumerable <string> practiceEvents)
{
var validEventNames = new HashSet <string>(EventName.SpecialEventNames.Concat(practiceEvents));
var tracksToRemove = new HashSet <int>();
var existingTextEvents = new List <TextEvent>();
var exsitingNoteEvents = new List <MidiEvent>();
var newEvents = new List <TextEvent>();
for (var t = 0; t < midi.Tracks; t++)
{
var textEvents = midi[t].OfType <TextEvent>();
var trackNameEvents = textEvents.
Where(e => e.MetaEventType == MetaEventType.SequenceTrackName).
OrderBy(e => e.AbsoluteTime).
ToList();
if (trackNameEvents.Count == 0)
{
continue;
}
var eventsRequiringConversion = trackNameEvents.Where(e => validEventNames.Contains(e.Text)).ToList();
if (trackNameEvents.Any(e => e.Text == TrackName.Events.ToString()))
{
// These don't mix well, so we don't allow it.
if (eventsRequiringConversion.Any())
{
// TODO: probably not the best exception type??
throw new NotSupportedException($"You cannot have '{TrackName.Events}' and '[event]' events on the same track");
}
FilterEventNotes(midi, t, exsitingNoteEvents);
// These are regular TextEvents already on the events track
// (not SequenceTrackName events that would require a conversion)
existingTextEvents.AddRange(textEvents.
Where(e => e.MetaEventType == MetaEventType.TextEvent && validEventNames.Contains(e.Text)));
tracksToRemove.Add(t);
}
foreach (var range in eventsRequiringConversion.GetRanges())
{
var notes = midi[t].
OfType <NoteOnEvent>().
Where(n => n.AbsoluteTime >= range.Start && n.AbsoluteTime < range.End);
var eventsForRange = notes.
Select(n => new TextEvent(range.Name, MetaEventType.TextEvent, n.AbsoluteTime)).
ToList();
tracksToRemove.Add(t);
if (eventsForRange.Count == 0)
{
AddWarning($"Cannot convert '{range.Name}' to an EVENT as it has no notes.");
continue;
}
if (eventsForRange.Count > 1)
{
AddWarning($"Cannot have more than one note for '{range.Name}'; " +
"only the first will be converted to an EVENT.");
}
var convertedEvent = eventsForRange.First();
AddInfo($"{range.Name} event converted at {GetBarInfo(midi, convertedEvent)}");
newEvents.Add(convertedEvent);
}
}
RemoveTracks(midi, tracksToRemove);
var textEventsGroups = existingTextEvents.Concat(newEvents).
GroupBy(e => e.Text).
ToList();
var duplicateEvents = textEventsGroups.Where(kvp => kvp.Count() > 1).Select(kvp => $"'{kvp.Key}'");
var duplicateWarnings = string.Join(", ", duplicateEvents);
if (!string.IsNullOrEmpty(duplicateWarnings))
{
AddWarning($"Duplicate events {duplicateWarnings}; using first of each.");
}
var uniqueTextEvents = textEventsGroups.Select(kvp => kvp.OrderBy(e => e.AbsoluteTime).First());
var consolidatedEvents = new List <MidiEvent>(uniqueTextEvents);
consolidatedEvents.AddRange(exsitingNoteEvents);
midi.AddNamedTrack(TrackName.Events.ToString(), consolidatedEvents);
}
public static IList <MidiEvent> AddNamedTrack(this MidiEventCollection midiEventCollection, string name, params MidiEvent[] initialEvents)
{
return(midiEventCollection.AddNamedTrack(name, (IEnumerable <MidiEvent>)initialEvents));
}
