private void SetRealValue(double value, EChangeType changeType)
{
if (!DSPFunctions.IsZero(Math.Abs(RealValue - value)))
{
RealValue = value;
OnValueChange?.Invoke(changeType);
}
}
public FrequencyParameter(string name, string label, string shortLabel, double min = 1, double max = 20000, bool canBeAutomated = true) :
base(name, label, shortLabel, min, max, 1, canBeAutomated)
{
if (Min < 0 ||
DSPFunctions.IsZero(Min))
{
throw new ArgumentException();
}
}
public double ModifyValue(double currentValue, int sampleNumber)
{
var gain = Gain.Value;
if (DSPFunctions.IsZero(gain))
{
return(currentValue);
}
var amplitude = GetCurrentAmplitude(sampleNumber);
gain *= amplitude * Math.Min(currentValue, 1 - currentValue);
return(DSPFunctions.Clamp01(currentValue + gain));
}
protected Parameter(string name, string description, string label,
double min, double max, double step, bool canBeAutomated = true) :
base(name, description, label, canBeAutomated)
{
if (max <= min ||
step > (max - min))
{
throw new ArgumentException();
}
Min = min;
Max = max;
Step = Range / Math.Max(1, (int)(1 / DSPFunctions.Clamp01(step / Range)));
RealStep = Step / Range;
}
private void Knob_OnMouseMove(object sender, MouseEventArgs e)
{
if (_isMouseDown)
{
var position = e.GetPosition(this);
var delta = position.Y - _mouseStartPoint.Y;
_value = _knobStartValue - delta * KDeltaFactor;
_value = DSPFunctions.Clamp01(_value);
_value = (int)(_value * _invertedStep) / _invertedStep;
if (_parameter != null)
{
SetValue();
}
else
{
UpdateController();
}
}
}
public double NextSample(int i)
{
double value = 0.0;
double t = phase / twoPI;
if (type == EOscillatorType.Sine)
{
value = naiveWaveformForMode(EOscillatorType.Sine);
}
else if (type == EOscillatorType.Saw)
{
value = naiveWaveformForMode(EOscillatorType.Saw);
value -= PolyBlep(t);
}
else if (type == EOscillatorType.Noise)
{
value = naiveWaveformForMode(EOscillatorType.Noise);
}
else
{
value = naiveWaveformForMode(EOscillatorType.Square);
value += PolyBlep(t);
value -= PolyBlep(DSPFunctions.Fmod(t + 0.5, 1.0));
if (type == EOscillatorType.Triangle)
{
// Leaky integrator: y[n] = A * x[n] + (1 - A) * y[n-1]
value = phaseIncrement * value + (1 - phaseIncrement) * lastOutput;
lastOutput = value;
}
}
UpdateIncrement(i);
phase += phaseIncrement;
while (phase >= twoPI)
{
phase -= twoPI;
}
return(value);
}
private void MidiListenerOnNoteOn(object sender, MidiListener.NoteEventArgs e)
{
var newNote = e.NoteAbsolute;
// если уже была нажата нота, нужно скопировать ее фазу, чтобы не было щелчка
double time = 0;
if (_tone != null)
{
// фаза от 0 до 1
var tonePhase = DSPFunctions.Frac(_tone.Time * GetToneFrequency(_tone.Note, 0));
// фаза второй ноты должна быть такой же, определим время по частоте
time = tonePhase / GetToneFrequency(newNote, 0);
}
_tone = new Tone
{
Time = time,
Note = e.NoteAbsolute
};
}
private double GetToneFrequency(int sampleNumber)
{
return(DSPFunctions.GetNoteFrequency(note + paramOwner.Semitone.ProcessedValue(sampleNumber) + paramOwner.Fine.ProcessedValue(sampleNumber)));
}
private bool IsRealValueTrue()
{
return(!DSPFunctions.IsZero(GetRealValue()));
}
public override string FromValueToString(double value)
{
return(PrintDouble(DSPFunctions.AmplitudeToDb(value)));
}
public double GetDb()
{
return(DSPFunctions.AmplitudeToDb(Value));
}
public override double FromStringToValue(string s)
{
return(DSPFunctions.Clamp(ParseDouble(s), Min, Max));
}
public override double FromReal(double value)
{
return(DSPFunctions.Lerp(Min, Max, value));
}
public override int FromStringToValue(string s)
{
return((int)Math.Round(DSPFunctions.Clamp(int.Parse(s, CultureInfo.InvariantCulture), Min, Max), MidpointRounding.AwayFromZero));
}
public override int FromReal(double value)
{
return((int)Math.Round(DSPFunctions.Lerp(Min, Max, value), MidpointRounding.AwayFromZero));
}
public override double FromStringToValue(string s)
{
var volumeDb = DSPFunctions.Clamp(ParseDouble(s), DSPFunctions.KMinADb, DSPFunctions.KMaxADb);
return((volumeDb - DSPFunctions.KMinADb) / (DSPFunctions.KMaxADb - DSPFunctions.KMinADb));
}
private double GetToneFrequency(int note, int sampleNumber)
{
return(DSPFunctions.GetNoteFrequency(note + Fine.ProcessedValue(sampleNumber)));
}