public void GetFilterRange(double x, double y)
{
double lowFreq = 20000;
double highFreq = 20;
double centreFreq = x;
if (Dsp.GetScriptVal("SCALE").GetType().Name == "Func`2")
{
Func <double, double> scale = (Func <double, double>)Dsp.GetScriptVal("SCALE");
centreFreq = scale((int)x);
}
if (y > 0.7)
{
highFreq = 20 + (centreFreq - 2.8 * (centreFreq / 100) - 20) * Math.Pow(y, 6);
lowFreq = centreFreq + centreFreq - highFreq;
}
SetFilter((float)lowFreq, (float)highFreq, (float)centreFreq, (float)(16 * y), (float)(40 * y));
string note = Dsp.Analyser.GetMusic().GetNote(centreFreq);
ui.SetFilterText(note, centreFreq);
}
/*
* Master method for performing analysis
*/
public async void RunAnalysis()
{
if (ui.Output.PlaybackState == PlaybackState.Playing || Mode == 1)
{
if (SpectrogramOpened) // Display spectrogram analysis in real-time
{
Dsp.ReadSpectrogramFrame();
DisplayAnalysisUI();
DisplayChords();
if (AudioSource.AudioStream != null)
{
ui.specViewer.OnTimestampUpdate(AudioSource.AudioStream.CurrentTime.TotalMilliseconds);
}
ui.RenderSpectrum();
}
else // Perform real-time analysis pipeline
{
ui.EnableTimer(false);
var watch = System.Diagnostics.Stopwatch.StartNew();
Dsp.RunFrequencyAnalysis();
Dsp.FrequencyAnalysisToSpectrum(Dsp.GetScriptVal("SCALE"));
Dsp.RunPitchDetection();
Dsp.Analyser.GetNotes(Dsp.FreqPeaks, (double[])Dsp.GetScriptVal("POSITIONS"), analysisUpdates);
Task asyncAnalysis = RunAnalysisAsync();
DisplayAnalysisUI();
ui.RenderSpectrum();
if (Dsp.Analyser.GetAvgError().Count == Prefs.ERROR_DURATION) // Calculate average note error
{
int error = (int)Dsp.Analyser.GetAvgError().Average();
if (error >= 0)
{
ui.SetErrorText("+ " + Math.Abs(error) + " Cents");
}
else
{
ui.SetErrorText("- " + Math.Abs(error) + " Cents");
}
Dsp.Analyser.ResetError();
}
await asyncAnalysis;
if (Prefs.STORE_SPEC_DATA)
{
Dsp.WriteToSpectrogram();
}
watch.Stop();
if (Prefs.UPDATE_MODE == 0) // Dynamic update mode
{
executionTime.Add((int)watch.ElapsedMilliseconds);
if (executionTime.Count == Prefs.AVG_EXECUTIONS) // Calculate average execution time
{
int executionTime = AverageExecutionTime();
if (executionTime >= Prefs.MIN_UPDATE_TIME)
{
ui.SetTimerInterval(executionTime);
}
ui.SetExecTimeText(executionTime);
}
}
else if (Prefs.UPDATE_MODE == 1) // Manual update mode
{
ui.SetTimerInterval(Prefs.MIN_UPDATE_TIME);
ui.SetExecTimeText((int)watch.ElapsedMilliseconds);
}
if (Mode != 1)
{
ui.EnableTimer(true);
}
analysisUpdates++;
}
}
}
