static IEnumerable<ChordNameMeta> EC_CalculateChordSymbols(ECToneNameEnum[] tones, bool firstOnly)
{
var ret = new List<ChordNameMeta>();
if (tones.IsEmpty())
{
return ret;
}
var distinctTones = tones.Distinct().OrderBy(x => x.ToInt()).ToList();
if (distinctTones.Count() == 1)
{
ret.Add(new ChordNameMeta() { ToneName = ChordNameFinder.GetToneName(distinctTones.First()) });
return ret;
}
else if (distinctTones.Count() == 2)
{
distinctTones.Add(distinctTones.First());
}
var n = distinctTones.Count();
if (n < 3 || n > 5)
{
return ret;
}
var ecNotes = distinctTones.Select(x => EC_NotesDir[((int)x)]).ToArray();
for (var i = 0; i < EC_Chords.Length; i++)
{
for (var j = 0; j < 12; j++)
{
var x = 0;
if (n == EC_Chords[i].Notes.Length)
{
for (var k = 0; k < EC_Chords[i].Notes.Length; k++)
{
var tone = ((EC_Chords[i].Notes[k] + j - 1) % 12);
for (var l = 0; l < n; l++)
{
if (tone == (int)tones[l])
{
x++;
}
}
}
}
if (x == EC_Chords[i].Notes.Length)
{
var chord = EC_ShowChord(EC_NotesDir[j] + EC_Chords[i].Description);
if (chord != null)
{
ret.Add(chord);
if (firstOnly)
break;
}
}
}
}
return ret;
}
static ToneNameEnum GetToneName(ECToneNameEnum tone)
{
return (ToneNameEnum)((((int)tone) + 8) % 12);
}
static ToneNameEnum GetToneName(ECToneNameEnum tone)
{
return((ToneNameEnum)((((int)tone) + 8) % 12));
}