/// <summary>
/// Resizes group of notes to the specified length treating all notes as single object.
/// </summary>
/// <param name="notes">Notes to resize.</param>
/// <param name="length">New length of the notes collection.</param>
/// <param name="distanceCalculationType">Type of distance calculations.</param>
/// <param name="tempoMap"></param>
/// <exception cref="ArgumentNullException"><paramref name="notes"/> is null. -or-
/// <paramref name="length"/> is null. -or- <paramref name="tempoMap"/> is null.</exception>
/// <exception cref="ArgumentException"><see cref="TimeSpanType.BarBeat"/> used for <paramref name="distanceCalculationType"/>
/// with relative resizing.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="distanceCalculationType"/> specified an
/// invalid value.</exception>
public static void ResizeNotes(this IEnumerable <Note> notes,
ITimeSpan length,
TimeSpanType distanceCalculationType,
TempoMap tempoMap)
{
ThrowIfArgument.IsNull(nameof(notes), notes);
ThrowIfArgument.IsNull(nameof(length), length);
ThrowIfArgument.IsInvalidEnumValue(nameof(distanceCalculationType), distanceCalculationType);
ThrowIfArgument.IsNull(nameof(tempoMap), tempoMap);
if (distanceCalculationType == TimeSpanType.BarBeat)
{
throw new ArgumentException("BarBeat length type is not supported for relative resizing.", nameof(distanceCalculationType));
}
if (!notes.Any())
{
return;
}
//
var minStartTime = long.MaxValue;
var maxEndTime = 0L;
foreach (var note in notes.Where(n => n != null))
{
var noteStartTime = note.Time;
var noteEndTime = noteStartTime + note.Length;
minStartTime = Math.Min(minStartTime, noteStartTime);
maxEndTime = Math.Max(maxEndTime, noteEndTime);
}
var totalLength = maxEndTime - minStartTime;
//
var oldLength = LengthConverter.ConvertTo(totalLength, distanceCalculationType, minStartTime, tempoMap);
var newLength = LengthConverter.ConvertTo(length, distanceCalculationType, minStartTime, tempoMap);
var ratio = TimeSpanUtilities.Divide(newLength, oldLength);
var startTime = TimeConverter.ConvertTo(minStartTime, distanceCalculationType, tempoMap);
foreach (var note in notes.Where(n => n != null))
{
var noteLength = note.LengthAs(distanceCalculationType, tempoMap);
var noteTime = note.TimeAs(distanceCalculationType, tempoMap);
var scaledShiftFromStart = noteTime.Subtract(startTime, TimeSpanMode.TimeTime).Multiply(ratio);
note.Time = TimeConverter.ConvertFrom(startTime.Add(scaledShiftFromStart, TimeSpanMode.TimeLength), tempoMap);
var scaledLength = noteLength.Multiply(ratio);
note.Length = LengthConverter.ConvertFrom(scaledLength, note.Time, tempoMap);
}
}
/// <summary>
/// Resizes group of notes to the specified length treating all notes as single object.
/// </summary>
/// <param name="notes">Notes to resize.</param>
/// <param name="length">New length of the notes collection.</param>
/// <param name="distanceCalculationType">Type of distance calculations.</param>
/// <param name="tempoMap"></param>
/// <exception cref="ArgumentNullException"><paramref name="notes"/> is null. -or-
/// <paramref name="length"/> is null. -or- <paramref name="tempoMap"/> is null.</exception>
/// <exception cref="ArgumentException"><see cref="TimeSpanType.BarBeatTicks"/> or <see cref="TimeSpanType.BarBeatFraction"/>
/// is used for <paramref name="distanceCalculationType"/> which is unsupported.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="distanceCalculationType"/> specified an
/// invalid value.</exception>
public static void ResizeNotes(this IEnumerable <Note> notes,
ITimeSpan length,
TimeSpanType distanceCalculationType,
TempoMap tempoMap)
{
ThrowIfArgument.IsNull(nameof(notes), notes);
ThrowIfArgument.IsNull(nameof(length), length);
ThrowIfArgument.IsInvalidEnumValue(nameof(distanceCalculationType), distanceCalculationType);
ThrowIfArgument.IsNull(nameof(tempoMap), tempoMap);
// Unable to calculate ratio between two bar/beat time spans
if (distanceCalculationType == TimeSpanType.BarBeatTicks || distanceCalculationType == TimeSpanType.BarBeatFraction)
{
throw new ArgumentException("Bar/beat distance calculation type is not supported.", nameof(distanceCalculationType));
}
var notNullNotes = notes.Where(n => n != null);
if (!notNullNotes.Any())
{
return;
}
//
var minStartTime = long.MaxValue;
var maxEndTime = 0L;
foreach (var note in notNullNotes)
{
var noteStartTime = note.Time;
var noteEndTime = noteStartTime + note.Length;
minStartTime = Math.Min(minStartTime, noteStartTime);
maxEndTime = Math.Max(maxEndTime, noteEndTime);
}
var totalLength = maxEndTime - minStartTime;
//
var oldLength = LengthConverter.ConvertTo(totalLength, distanceCalculationType, minStartTime, tempoMap);
var newLength = LengthConverter.ConvertTo(length, distanceCalculationType, minStartTime, tempoMap);
var ratio = TimeSpanUtilities.Divide(newLength, oldLength);
var startTime = TimeConverter.ConvertTo(minStartTime, distanceCalculationType, tempoMap);
ResizeNotesByRatio(notNullNotes, ratio, distanceCalculationType, tempoMap, startTime);
}
/// <summary>
/// Resizes <see cref="MidiFile"/> to the specified length.
/// </summary>
/// <param name="midiFile"><see cref="MidiFile"/> to resize.</param>
/// <param name="length">New length of the <paramref name="midiFile"/>.</param>
/// <exception cref="ArgumentNullException"><paramref name="midiFile"/> is null. -or-
/// <paramref name="length"/> is null.</exception>
public static void Resize(this MidiFile midiFile, ITimeSpan length)
{
ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
ThrowIfArgument.IsNull(nameof(length), length);
if (midiFile.IsEmpty())
{
return;
}
var tempoMap = midiFile.GetTempoMap();
var duration = midiFile.GetDuration <MidiTimeSpan>();
var oldLength = TimeConverter.ConvertTo(duration, length.GetType(), tempoMap);
var ratio = TimeSpanUtilities.Divide(length, oldLength);
ResizeByRatio(midiFile, ratio);
}
/// <summary>
/// Resizes <see cref="MidiFile"/> to the specified length.
/// </summary>
/// <param name="midiFile"><see cref="MidiFile"/> to resize.</param>
/// <param name="length">New length of the <paramref name="midiFile"/>.</param>
/// <exception cref="ArgumentNullException"><paramref name="midiFile"/> is null. -or-
/// <paramref name="length"/> is null.</exception>
public static void Resize(this MidiFile midiFile, ITimeSpan length)
{
ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
ThrowIfArgument.IsNull(nameof(length), length);
var lastTime = midiFile.GetTimedEvents().LastOrDefault()?.Time ?? 0;
if (lastTime == 0)
{
return;
}
var tempoMap = midiFile.GetTempoMap();
var oldLength = TimeConverter.ConvertTo((MidiTimeSpan)lastTime, length.GetType(), tempoMap);
var ratio = TimeSpanUtilities.Divide(length, oldLength);
ResizeByRatio(midiFile, ratio);
}
public static void Resize(this MidiFile midiFile, ITimeSpan length)
{
ThrowIfArgument.IsNull(nameof(midiFile), midiFile);
ThrowIfArgument.IsNull(nameof(length), length);
// TODO: create method to get absolute time (or last time...)
var lastTime = midiFile.GetTimedEvents().LastOrDefault()?.Time;
if (lastTime.GetValueOrDefault() == 0)
{
return;
}
var tempoMap = midiFile.GetTempoMap();
var oldLength = TimeConverter.ConvertTo((MidiTimeSpan)lastTime.Value, length.GetType(), tempoMap);
var ratio = TimeSpanUtilities.Divide(length, oldLength);
ResizeByRatio(midiFile, ratio);
}