public void TestBuilderDelay()
{
var sinusoid = new SinusoidBuilder()
.SetParameter("freq", 0.05f)
.OfLength(20)
.DelayedBy(1)
.Build();
Assert.Multiple(() =>
{
Assert.That(sinusoid[1], Is.EqualTo(0.0).Within(1e-7));
Assert.That(sinusoid[6], Is.EqualTo(1.0).Within(1e-7));
Assert.That(sinusoid[16], Is.EqualTo(-1.0).Within(1e-7));
Assert.That(sinusoid.Length, Is.EqualTo(21));
});
}
public void TestBuilderRepeat()
{
var sinusoid = new SinusoidBuilder()
.SetParameter("freq", 0.05f)
.OfLength(20)
.RepeatedTimes(3)
.Build();
Assert.Multiple(() =>
{
Assert.That(sinusoid[0], Is.EqualTo(0.0).Within(1e-7));
Assert.That(sinusoid[5], Is.EqualTo(1.0).Within(1e-7));
Assert.That(sinusoid[25], Is.EqualTo(1.0).Within(1e-7));
Assert.That(sinusoid.Length, Is.EqualTo(60));
});
}
public void TestSimpleSinusoidBuilder()
{
var sinusoid = new SinusoidBuilder()
.SetParameter("freq", 0.05f)
.OfLength(20)
.Build();
Assert.Multiple(() =>
{
Assert.That(sinusoid[0], Is.EqualTo(0.0).Within(1e-7));
Assert.That(sinusoid[5], Is.EqualTo(1.0).Within(1e-7));
Assert.That(sinusoid[10], Is.EqualTo(0.0).Within(1e-7));
Assert.That(sinusoid[15], Is.EqualTo(-1.0).Within(1e-7));
Assert.That(sinusoid.Length, Is.EqualTo(20));
});
}
public void TestBuilderSuperimpose()
{
var constants = new DiscreteSignal(1, length: 6, value: 2.0f);
var sinusoid = new SinusoidBuilder()
.SetParameter("freq", 0.05f)
.SuperimposedWith(constants)
.OfLength(20)
.SuperimposedWith(constants) // twice
.Build();
Assert.Multiple(() =>
{
Assert.That(sinusoid[0], Is.EqualTo(4.0).Within(1e-7));
Assert.That(sinusoid[5], Is.EqualTo(5.0).Within(1e-7));
Assert.That(sinusoid[10], Is.EqualTo(0.0).Within(1e-7));
Assert.That(sinusoid[15], Is.EqualTo(-1.0).Within(1e-7));
Assert.That(sinusoid.Length, Is.EqualTo(20));
});
}
private void generateSignalButton_Click(object sender, EventArgs e)
{
var sampleCount = int.Parse(durationTextBox.Text);
var samplingRate = _signal1?.SamplingRate ?? 16000;
SignalBuilder signalBuilder;
switch (builderComboBox.Text)
{
case "Sinusoid":
signalBuilder = new SinusoidBuilder();
_signal2 = signalBuilder
.SetParameter("amp", 0.2f)
.SetParameter("freq", 233 /*Hz*/)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Sawtooth":
signalBuilder = new SawtoothBuilder();
_signal2 = signalBuilder
.SetParameter("low", -0.3f)
.SetParameter("high", 0.3f)
.SetParameter("freq", 233 /*Hz*/)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Triangle Wave":
signalBuilder = new TriangleWaveBuilder();
_signal2 = signalBuilder
.SetParameter("low", -0.3f)
.SetParameter("high", 0.3f)
.SetParameter("freq", 233 /*Hz*/)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Square Wave":
signalBuilder = new SquareWaveBuilder();
_signal2 = signalBuilder
.SetParameter("low", -0.25f)
.SetParameter("high", 0.25f)
.SetParameter("freq", 233 /*Hz*/)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Pulse Wave":
signalBuilder = new PulseWaveBuilder();
_signal2 = signalBuilder
.SetParameter("amp", 0.5f)
.SetParameter("pulse", 0.007f /*sec*/)
.SetParameter("period", 0.020f /*sec*/)
.OfLength(sampleCount)
.DelayedBy(50)
.SampledAt(samplingRate)
.Build();
break;
case "Chirp":
signalBuilder = new ChirpBuilder();
_signal2 = signalBuilder
.SetParameter("amp", 0.75f)
.OfLength(sampleCount)
.RepeatedTimes(3)
.SampledAt(samplingRate)
.Build();
break;
case "AWGN":
signalBuilder = new AwgnBuilder();
_signal2 = signalBuilder
.SetParameter("sigma", 0.25f)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Pink Noise":
signalBuilder = new PinkNoiseBuilder();
_signal2 = signalBuilder
.SetParameter("min", -0.5f)
.SetParameter("max", 0.5f)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Red Noise":
signalBuilder = new RedNoiseBuilder();
_signal2 = signalBuilder
.SetParameter("min", -0.5f)
.SetParameter("max", 0.5f)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
case "Perlin Noise":
signalBuilder = new PerlinNoiseBuilder();
_signal2 = signalBuilder
.SetParameter("min", -0.3f)
.SetParameter("max", 0.7f)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
default:
signalBuilder = new WhiteNoiseBuilder();
_signal2 = signalBuilder
.SetParameter("min", -0.5f)
.SetParameter("max", 0.5f)
.OfLength(sampleCount)
.SampledAt(samplingRate)
.Build();
break;
}
builderParametersListBox.Items.Clear();
builderParametersListBox.Items.AddRange(signalBuilder.GetParametersInfo());
builderParametersListBox.Items.Add("");
builderParametersListBox.Items.Add($"min: {_signal2.Samples.Min():F2}");
builderParametersListBox.Items.Add($"max: {_signal2.Samples.Max():F2}");
builderParametersListBox.Items.Add($"avg: {_signal2.Samples.Average():F4}");
if (_signal1 != null)
{
_signal3 = _signal1 + _signal2;
superimposedSignalPanel.Signal = _signal3;
}
generatedSignalPanel.Stride = 1;
generatedSignalPanel.Signal = _signal2;
var spectrum = _fft.PowerSpectrum(_signal2.First(512));
spectrumPanel.Line = spectrum.Samples;
spectrumPanel.ToDecibel();
}
