public FrequencyChart BandGrouping(Bands bands, FrequencyChart chart, double threshHold)
{
var freqs = bands.Frequencies;
var workCharts = chart.Where(k => k.Level > threshHold).ToArray();
var newChart = new FrequencyChart(chart.TotalLevel, chart.AverageLevel, new List <FrequencyPair>());
var curBand = 0;
var curUpBound = freqs[curBand];
int curFreqInBand = 0;
var curPair = new FrequencyPair(curUpBound, 0);
for (int i = 0; i < workCharts.Count; i++)
{
var sample = workCharts [i];
if (sample.Frequency < curUpBound)
{
curPair.Level += sample.Level;
}
else if (freqs.Count > curBand)
{
curPair.Level /= curFreqInBand;
curFreqInBand = 0;
while (sample.Frequency > curUpBound)
{
curBand++;
if (freqs.Count <= curBand)
{
curUpBound = freqs[freqs.Count - 1] * 10;
}
else
{
curUpBound = freqs[curBand];
}
}
newChart.Add(curPair);
curPair = new FrequencyPair(curUpBound, sample.Level);
}
curFreqInBand++;
}
return(newChart);
}
public FrequencyChart BandGrouping(Bands bands, FrequencyChart chart)
{
Debug.Assert(bands.Notes.Count >= 2);
var freqs = bands.Notes.Select(k => k.Frequency).ToArray();
var curBand = 0;
var t = new List <FrequencyPair> ();
var lowPair = new FrequencyPair(bands.Notes[0].Frequency, 0);
var highPair = new FrequencyPair(bands.Notes[1].Frequency, 0);
t.Add(highPair);
t.Add(lowPair);
for (int i = 0; i < chart.Count; i++)
{
var sample = chart [i];
while (sample.Frequency > highPair.Frequency)
{
if (curBand == bands.Notes.Count - 1)
{
goto C1;
}
lowPair = highPair;
curBand++;
highPair = new FrequencyPair(bands.Notes [curBand].Frequency, 0);
t.Add(highPair);
}
lowPair.Level += sample.Level * Math.Round((sample.Frequency - lowPair.Frequency) / (highPair.Frequency - lowPair.Frequency));
highPair.Level += sample.Level * Math.Round((highPair.Frequency - sample.Frequency) / (highPair.Frequency - lowPair.Frequency));
}
C1 : return(new FrequencyChart(t));
}
public FrequencyChart LocalizeMaximums(FrequencyChart chart, int gapCount)
{
if (!chart.Any())
{
return(chart);
}
var list = new List <FrequencyPair> ();
bool raising = true;
FrequencyPair localMax = chart[0];
FrequencyPair lastMeaninful = chart[0];
for (var i = 0; i < chart.Count; i++)
{
double derivation;
var cur = GetFromArray(chart, i);
derivation = cur.Level - lastMeaninful.Level;
if (raising)
{
if (derivation >= 0)
{
localMax = cur;
lastMeaninful = localMax;
}
else
{
bool shouldContinueRaising = false;
for (int j = i + 1; j <= i + gapCount; j++)
{
if (GetFromArray(chart, j).Level - lastMeaninful.Level >= 0)
{
lastMeaninful = GetFromArray(chart, j);
shouldContinueRaising = true;
break;
}
}
if (!shouldContinueRaising)
{
list.Add(localMax);
lastMeaninful = cur;
raising = false;
}
}
}
else
{
if (derivation <= 0)
{
lastMeaninful = cur;
}
else
{
bool shouldStartRaising = true;
for (int j = i + 1; j <= i + gapCount; j++)
{
if (GetFromArray(chart, j).Level - lastMeaninful.Level <= 0)
{
lastMeaninful = GetFromArray(chart, j);
shouldStartRaising = false;
break;
}
}
if (shouldStartRaising)
{
localMax = cur;
lastMeaninful = cur;
raising = true;
}
}
}
}
if (raising)
{
list.Add(chart[chart.Count - 1]);
}
return(new FrequencyChart(list));
}
