public static List <RhythmValue> GetRhythm(List <float> noteDurations, int measureDuration, int beatDuration)
{
float sum = noteDurations.Sum();
float scaling = measureDuration / sum;
var noteEnds = new List <float>();
float total = 0;
for (int i = 0; i < noteDurations.Count; ++i)
{
noteDurations[i] *= scaling;
total += noteDurations[i];
noteEnds.Add(total);
}
MatchRhythm(noteEnds, 0, noteEnds.Count, 0, measureDuration, beatDuration);
// determine final note values
var ret = new List <RhythmValue>();
float offset = 0;
foreach (var end in noteEnds)
{
var rhythm = new RhythmValue()
{
Duration = (int)Math.Round(end - offset),
NoteIndex = ret.Count
};
offset = end;
ret.Add(rhythm);
}
SplitDurations(ret, measureDuration, beatDuration);
return(ret);
}
public static List<RhythmValue> GetRhythm(List<float> noteDurations, int measureDuration, int beatDuration)
{
float sum = noteDurations.Sum();
float scaling = measureDuration / sum;
var noteEnds = new List<float>();
float total = 0;
for (int i = 0; i < noteDurations.Count; ++i)
{
noteDurations[i] *= scaling;
total += noteDurations[i];
noteEnds.Add(total);
}
MatchRhythm(noteEnds, 0, noteEnds.Count, 0, measureDuration, beatDuration);
// determine final note values
var ret = new List<RhythmValue>();
float offset = 0;
foreach (var end in noteEnds)
{
var rhythm = new RhythmValue()
{
Duration = (int)Math.Round(end - offset),
NoteIndex = ret.Count
};
offset = end;
ret.Add(rhythm);
}
SplitDurations(ret, measureDuration, beatDuration);
return ret;
}
static void SplitDurations(List <RhythmValue> durations, int measureDuration, int beatLength)
{
// This function takes care of note values that cannot (or should not) be represented
// by a single note, and it also tries to split up the rhythm in a more or less
// readable way. This means e.g. that triplet notes should not stand alone.
// (Although the algorithm may not be perfect in prevent single triplets.)
int curPos = 0;
for (int i = 0; i < durations.Count; ++i)
{
if (durations[i].Duration <= 1)
{
continue;
}
if (PrintableDurations.Contains(durations[i].Duration))
{
curPos += durations[i].Duration;
continue;
}
//Console.WriteLine(" At pos {0}, trying to split duration {1}...", curPos, durations[i].Duration);
bool done = false;
int curBeat = beatLength;
int noteEnd = curPos + durations[i].Duration;
int n = 2;
int d = 3;
while (!done && curBeat >= 2)
{
int maxMult = noteEnd / curBeat;
for (int j = maxMult; j >= 1; --j)
{
int remaining = noteEnd - j * curBeat;
if (remaining < 2 && remaining != 0)
{
break;
}
int duration = durations[i].Duration - remaining;
if (PrintableDurations.Contains(duration))
{
durations[i].Duration = duration;
if (remaining != 0)
{
durations.Insert(i + 1, new RhythmValue()
{
Duration = remaining,
NoteIndex = durations[i].NoteIndex
});
}
done = true;
break;
}
}
// try next smaller even / triplet beat
curBeat = curBeat * n / d;
if (n == 2)
{
n = 3;
d = 4;
}
else
{
n = 2;
d = 3;
}
}
if (!PrintableDurations.Contains(durations[i].Duration))
{
Console.WriteLine(" Warning: Failed to split note duration {0} properly, splitting in half...", durations[i].Duration);
var newNote = new RhythmValue()
{
Duration = durations[i].Duration / 2,
NoteIndex = durations[i].NoteIndex
};
durations[i].Duration -= newNote.Duration;
durations.Insert(i + 1, newNote);
--i;
}
else
{
curPos += durations[i].Duration;
}
}
}
static void SplitDurations(List<RhythmValue> durations, int measureDuration, int beatLength)
{
// This function takes care of note values that cannot (or should not) be represented
// by a single note, and it also tries to split up the rhythm in a more or less
// readable way. This means e.g. that triplet notes should not stand alone.
// (Although the algorithm may not be perfect in prevent single triplets.)
int curPos = 0;
for (int i = 0; i < durations.Count; ++i)
{
if (durations[i].Duration <= 1)
continue;
if (PrintableDurations.Contains(durations[i].Duration))
{
curPos += durations[i].Duration;
continue;
}
//Console.WriteLine(" At pos {0}, trying to split duration {1}...", curPos, durations[i].Duration);
bool done = false;
int curBeat = beatLength;
int noteEnd = curPos + durations[i].Duration;
int n = 2;
int d = 3;
while (!done && curBeat >= 2)
{
int maxMult = noteEnd / curBeat;
for (int j = maxMult; j >= 1; --j)
{
int remaining = noteEnd - j * curBeat;
if (remaining < 2 && remaining != 0)
break;
int duration = durations[i].Duration - remaining;
if (PrintableDurations.Contains(duration))
{
durations[i].Duration = duration;
if (remaining != 0)
{
durations.Insert(i + 1, new RhythmValue()
{
Duration = remaining,
NoteIndex = durations[i].NoteIndex
});
}
done = true;
break;
}
}
// try next smaller even / triplet beat
curBeat = curBeat * n / d;
if (n == 2)
{
n = 3;
d = 4;
}
else
{
n = 2;
d = 3;
}
}
if (!PrintableDurations.Contains(durations[i].Duration))
{
Console.WriteLine(" Warning: Failed to split note duration {0} properly, splitting in half...", durations[i].Duration);
var newNote = new RhythmValue()
{
Duration = durations[i].Duration / 2,
NoteIndex = durations[i].NoteIndex
};
durations[i].Duration -= newNote.Duration;
durations.Insert(i + 1, newNote);
--i;
}
else
{
curPos += durations[i].Duration;
}
}
}