private static SortedList <TimingPoint> ConvertToSortedList(List <TimingPoint> presetTimingPoints)
{
var timingPoints = new SortedList <TimingPoint>(presetTimingPoints.Count, CompareTimingPoints);
var absoluteTimingPoints = Convert <TimingPoint, AbsoluteTimingPoint>(presetTimingPoints);
if (absoluteTimingPoints.Count == 0)
{
throw new InvalidOperationException("No absolute timing points were used");
}
absoluteTimingPoints[0].SetAsInitialTimingPoint();
var relativeTimingPoints = Convert <TimingPoint, RelativeTimingPoint>(presetTimingPoints);
relativeTimingPoints.Sort((a, b) => MeasuredTimePosition.CompareByAbsolutePosition(a.TimePosition, b.TimePosition));
// Add absolute timing points and calculate their relative time positions
AbsoluteTimingPoint previousAbsolute = null;
foreach (var a in absoluteTimingPoints)
{
if (previousAbsolute != null)
{
a.CalculateRelativeTimePosition(previousAbsolute);
}
timingPoints.Add(previousAbsolute = a);
}
// Add relative timing points, calculate their absolute time positions and adjust the absolute timing points' relative time positions
foreach (var r in relativeTimingPoints)
{
int index = timingPoints.IndexBefore(r);
r.CalculateAbsoluteTimePosition(timingPoints[index]);
if (index + 1 < timingPoints.Count)
{
// The next timing point is certainly an absolute timing point since no relative timing points have been added beyond that one yet
var nextAbsolute = timingPoints[index + 1] as AbsoluteTimingPoint;
// Calculate the measure adjustment for the first absolute timing point to apply it to all the rest
int currentMeasure = nextAbsolute.RelativeTimePosition.Measure;
nextAbsolute.CalculateRelativeTimePosition(r);
int newMeasure = nextAbsolute.RelativeTimePosition.Measure;
int measureAdjustment = newMeasure - currentMeasure;
if (measureAdjustment != 0)
{
for (int i = index + 2; i < timingPoints.Count; i++)
{
(timingPoints[i] as AbsoluteTimingPoint).AdjustMeasure(measureAdjustment);
}
}
}
timingPoints.Add(r);
}
return(timingPoints);
}
/// <summary>Attempts to parse a string representation of a timing point into a <seealso cref="TimingPoint"/> and returns the resulting parsed object, or <see langword="null"/>.</summary>
/// <param name="s">The string representation of a timing point to parse.</param>
public static TimingPoint Parse(string s)
{
if (AbsoluteTimingPoint.TryParse(s, out var absolute))
{
return(absolute);
}
if (RelativeTimingPoint.TryParse(s, out var relative))
{
return(relative);
}
return(null);
}
