/// <summary>
/// Extracts objects of the specified types from a collection of <see cref="ITimedObject"/>.
/// </summary>
/// <param name="timedObjects">Collection of <see cref="ITimedObject"/> to extract objects from.</param>
/// <param name="objectType">Combination of desired objects types.</param>
/// <param name="settings">Settings according to which objects should be detected and built.</param>
/// <returns>Collection of objects of the specified types extracted from <paramref name="timedObjects"/>.
/// Objects are ordered by time.</returns>
/// <exception cref="ArgumentNullException"><paramref name="timedObjects"/> is <c>null</c>.</exception>
public static ICollection <ITimedObject> GetObjects(
this IEnumerable <ITimedObject> timedObjects,
ObjectType objectType,
ObjectDetectionSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(timedObjects), timedObjects);
var getChords = objectType.HasFlag(ObjectType.Chord);
var getNotes = objectType.HasFlag(ObjectType.Note);
var resultCollectionSize = 0;
var processedTimedObjects = new List <ITimedObject>();
foreach (var timedObject in timedObjects)
{
var processed =
TryProcessTimedEvent(timedObject as TimedEvent, processedTimedObjects) ||
TryProcessNote(timedObject as Note, processedTimedObjects, getNotes, getChords) ||
TryProcessChord(timedObject as Chord, processedTimedObjects, getNotes, getChords);
if (processed)
{
resultCollectionSize++;
}
}
return(GetObjectsFromSortedTimedObjects(
processedTimedObjects.OrderBy(o => o.Time),
resultCollectionSize,
objectType,
settings));
}
/// <summary>
/// Extracts objects of the specified types from a <see cref="TrackChunk"/>.
/// </summary>
/// <param name="trackChunk"><see cref="TrackChunk"/> to extract objects from.</param>
/// <param name="objectType">Combination of desired objects types.</param>
/// <param name="settings">Settings according to which objects should be detected and built.</param>
/// <returns>Collection of objects of the specified types extracted from <paramref name="trackChunk"/>.
/// Objects are ordered by time.</returns>
/// <exception cref="ArgumentNullException"><paramref name="trackChunk"/> is <c>null</c>.</exception>
public static ICollection <ITimedObject> GetObjects(
this TrackChunk trackChunk,
ObjectType objectType,
ObjectDetectionSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(trackChunk), trackChunk);
return(trackChunk.Events.GetObjects(objectType, settings));
}
/// <summary>
/// Extracts objects of the specified types from a <see cref="MidiFile"/>.
/// </summary>
/// <param name="midiFile"><see cref="MidiFile"/> to extract objects from.</param>
/// <param name="objectType">Combination of desired objects types.</param>
/// <param name="settings">Settings according to which objects should be detected and built.</param>
/// <returns>Collection of objects of the specified types extracted from <paramref name="midiFile"/>.
/// Objects are ordered by time.</returns>
/// <exception cref="ArgumentNullException"><paramref name="midiFile"/> is <c>null</c>.</exception>
public static ICollection <ITimedObject> GetObjects(
this MidiFile midiFile,
ObjectType objectType,
ObjectDetectionSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
return(midiFile.GetTrackChunks().GetObjects(objectType, settings));
}
/// <summary>
/// Extracts objects of the specified types from a <see cref="EventsCollection"/>.
/// </summary>
/// <param name="eventsCollection"><see cref="EventsCollection"/> to extract objects from.</param>
/// <param name="objectType">Combination of desired objects types.</param>
/// <param name="settings">Settings according to which objects should be detected and built.</param>
/// <returns>Collection of objects of the specified types extracted from <paramref name="eventsCollection"/>.
/// Objects are ordered by time.</returns>
/// <exception cref="ArgumentNullException"><paramref name="eventsCollection"/> is <c>null</c>.</exception>
public static ICollection <ITimedObject> GetObjects(
this EventsCollection eventsCollection,
ObjectType objectType,
ObjectDetectionSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(eventsCollection), eventsCollection);
return(eventsCollection
.GetTimedEventsLazy()
.GetObjectsFromSortedTimedObjects(eventsCollection.Count / 2, objectType, settings));
}
/// <summary>
/// Extracts objects of the specified types from a collection of <see cref="MidiEvent"/>.
/// </summary>
/// <param name="midiEvents">Collection of <see cref="MidiEvent"/> to extract objects from.</param>
/// <param name="objectType">Combination of desired objects types.</param>
/// <param name="settings">Settings according to which objects should be detected and built.</param>
/// <returns>Collection of objects of the specified types extracted from <paramref name="midiEvents"/>.
/// Objects are ordered by time.</returns>
/// <exception cref="ArgumentNullException"><paramref name="midiEvents"/> is <c>null</c>.</exception>
public static ICollection <ITimedObject> GetObjects(
this IEnumerable <MidiEvent> midiEvents,
ObjectType objectType,
ObjectDetectionSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(midiEvents), midiEvents);
return(midiEvents
.GetTimedEventsLazy()
.GetObjectsFromSortedTimedObjects(0, objectType, settings));
}
/// <summary>
/// Extracts objects of the specified types from a collection of <see cref="TrackChunk"/>.
/// </summary>
/// <param name="trackChunks">Collection of <see cref="TrackChunk"/> to extract objects from.</param>
/// <param name="objectType">Combination of desired objects types.</param>
/// <param name="settings">Settings according to which objects should be detected and built.</param>
/// <returns>Collection of objects of the specified types extracted from <paramref name="trackChunks"/>.
/// Objects are ordered by time.</returns>
/// <exception cref="ArgumentNullException"><paramref name="trackChunks"/> is <c>null</c>.</exception>
public static ICollection <ITimedObject> GetObjects(
this IEnumerable <TrackChunk> trackChunks,
ObjectType objectType,
ObjectDetectionSettings settings = null)
{
ThrowIfArgument.IsNull(nameof(trackChunks), trackChunks);
var eventsCollections = trackChunks.Where(c => c != null).Select(c => c.Events).ToArray();
var eventsCount = eventsCollections.Sum(c => c.Count);
return(eventsCollections
.GetTimedEventsLazy(eventsCount)
.Select(e => e.Item1)
.GetObjectsFromSortedTimedObjects(eventsCount / 2, objectType, settings));
}
private static ICollection <ITimedObject> GetObjectsFromSortedTimedObjects(
this IEnumerable <ITimedObject> processedTimedObjects,
int resultCollectionSize,
ObjectType objectType,
ObjectDetectionSettings settings)
{
var getChords = objectType.HasFlag(ObjectType.Chord);
var getNotes = objectType.HasFlag(ObjectType.Note);
var getRests = objectType.HasFlag(ObjectType.Rest);
var getTimedEvents = objectType.HasFlag(ObjectType.TimedEvent);
settings = settings ?? new ObjectDetectionSettings();
var noteDetectionSettings = settings.NoteDetectionSettings ?? new NoteDetectionSettings();
var chordDetectionSettings = settings.ChordDetectionSettings ?? new ChordDetectionSettings();
var restDetectionSettings = settings.RestDetectionSettings ?? new RestDetectionSettings();
var timedObjects = processedTimedObjects;
if (getChords || getNotes || getRests)
{
var notesAndTimedEvents = processedTimedObjects.GetNotesAndTimedEventsLazy(noteDetectionSettings, true);
timedObjects = getChords
? notesAndTimedEvents.GetChordsAndNotesAndTimedEventsLazy(chordDetectionSettings, true)
: notesAndTimedEvents;
}
//
var result = resultCollectionSize > 0
? new List <ITimedObject>(resultCollectionSize)
: new List <ITimedObject>();
var notesLastEndTimes = new Dictionary <object, long>();
var noteDescriptorProvider = NoteDescriptorProviders[restDetectionSettings.RestSeparationPolicy];
var setRestChannel = SetRestChannel[restDetectionSettings.RestSeparationPolicy];
var setRestNoteNumber = SetRestNoteNumber[restDetectionSettings.RestSeparationPolicy];
foreach (var timedObject in timedObjects)
{
if (getChords)
{
var chord = timedObject as Chord;
if (chord != null)
{
result.Add(chord);
}
}
if (getNotes)
{
var note = timedObject as Note;
if (note != null)
{
result.Add(note);
}
}
if (getTimedEvents)
{
var timedEvent = timedObject as TimedEvent;
if (timedEvent != null)
{
result.Add(timedEvent);
}
}
if (getRests)
{
var note = timedObject as Note;
if (note != null)
{
var noteDescriptor = noteDescriptorProvider(note);
long lastEndTime;
notesLastEndTimes.TryGetValue(noteDescriptor, out lastEndTime);
if (note.Time > lastEndTime)
{
var rest = new Rest(
lastEndTime,
note.Time - lastEndTime,
setRestChannel ? (FourBitNumber?)note.Channel : null,
setRestNoteNumber ? (SevenBitNumber?)note.NoteNumber : null);
if (result.Count > 0)
{
var i = result.Count - 1;
for (; i >= 0; i--)
{
if (rest.Time >= result[i].Time)
{
break;
}
}
i++;
if (i >= result.Count)
{
result.Add(rest);
}
else
{
result.Insert(i, rest);
}
}
else
{
result.Add(rest);
}
}
notesLastEndTimes[noteDescriptor] = Math.Max(lastEndTime, note.Time + note.Length);
}
}
}
result.TrimExcess();
return(result);
}
