public BeatStrengthAnalyzer(Model midi)
{
_midi = midi;
_beats = _midi.EventsOfType <BeatEvent>().OrderBy(b => b.AbsoluteRealTime).ToArray();
_segments = new BeatSegment[_beats.Length];
for (var i = 0; i < _segments.Length; i++)
{
_segments[i] = new BeatSegment(_beats[i], i, _segments);
}
}
private void ChooseStrongBeats()
{
foreach (var beat in _beats)
{
beat.Level = 1;
}
var(lastSegmentIndex, _) = _segments.Select(s => s.BestScore.score).MaxWithIndex();
var segment = _segments[lastSegmentIndex];
var interval = BeatSegment.IndexToInterval(segment.BestScore.index);
var prevIndex = segment.GetPreviousIndex(segment.BestScore.index);
while (interval != null && segment.Index - (int)interval > 0)
{
segment.Beat.Level = 0;
if (interval == 3)
{
_segments[segment.Index - 1].Beat.Level = 2;
_segments[segment.Index - 2].Beat.Level = 2;
}
else if (interval == 4)
{
_segments[segment.Index - 1].Beat.Level = 2;
_segments[segment.Index - 3].Beat.Level = 2;
}
else if (interval == 6)
{
_segments[segment.Index - 1].Beat.Level = 2;
_segments[segment.Index - 2].Beat.Level = 2;
_segments[segment.Index - 4].Beat.Level = 2;
_segments[segment.Index - 5].Beat.Level = 2;
}
segment = _segments[segment.Index - (int)interval];
interval = BeatSegment.IndexToInterval(prevIndex);
prevIndex = segment.GetPreviousIndex(prevIndex);
}
segment.Beat.Level = 0;
}