public static SongParametrs Detector(SongData data)
{
var parametrs = new SongParametrs();
parametrs.Song = data;
double[] signal = new double[data.leng];
//Объединение сигналов
for (int i = 0; i < data.leng; i++)
{
signal[i] = data.Left[i] + data.Right[i];
}
int st = 10;
int frameSize = 1 << st;
int sst = 0;
int s = 1 << sst;
int step = 1;
int HiFilter = 1 << 3;
//Преобразование фурье
parametrs.TransformSong = FastFourierTransform.WindowFFTParalell(signal, frameSize, step, s, st - sst);
//Диффирационный фильтр
List <double[]> FrequencyFunctions = new List <double[]>();
for (int i = 0; i < frameSize / HiFilter; i++)
{
double[] func = new double[data.leng / step];
for (int j = 0; j < data.leng / step; j++)
{
func[j] = parametrs.TransformSong[j, i];
}
func = Filters.Differentiator5(func);
FrequencyFunctions.Add(func);
}
ppp = FrequencyFunctions;
//Суммирование
parametrs.BeatFunction = new double[data.leng / step];
for (int i = 0; i < data.leng / step; i++)
{
parametrs.BeatFunction[i] = 0;
for (int j = 1; j < frameSize / HiFilter; j++)
{
parametrs.BeatFunction[i] += Math.Abs(FrequencyFunctions[j][i]);
}
}
var f = Filters.DellShum(parametrs.BeatFunction);
var cor = Correlation.Easy(TableFunction.TableToFunction(f, 1, 0, parametrs.BeatFunction.Length), 1, 0, parametrs.BeatFunction.Length / 3);
var Max = MaxAssistance.LocalMax2(MaxAssistance.LocalMax(MaxAssistance.CompressFunc(cor, 1, 0), 220), 10);
var BeatMax = MaxAssistance.LocalMax2(MaxAssistance.LocalMax(parametrs.BeatFunction, 220), 10);
double BPMd = Max[1].Item1 * 1 * step;
int sd = (int)BeatMax[0].Item1 * step;
parametrs.Temp = 60 * 44100 / BPMd;
parametrs.TempD = (int)BPMd;
parametrs.StartBeat = sd;
return(parametrs);
}
