public override void PrepareProcessing()
{
if (_precTimer == null)
{
_precTimer = new PrecisionTimer();
_precTimer.Elapsed += precTimer_Elapsed;
_precTimer.Milliseconds = _attrPeriod.TypedGet();
_precTimer.ToleranceMilliseconds = 10;
}
var sampleCount = _attrSamplerate.TypedGet() * _attrPeriod.TypedGet() / 1000;
if (_buffer == null || _buffer.Length != sampleCount)
{
_buffer = new double[sampleCount];
}
_portOut.PrepareProcessing(
DefaultParameters.DefaultQueueMilliseconds.ToSamples(_portOut.Samplerate),
DefaultParameters.DefaultBufferMilliseconds.ToSamples(_portOut.Samplerate)
);
CalculatePhaseStep();
_phaseAcc = 0;
}
public MetricFFT(Graph graph) : base("FFT", graph)
{
_portOut = new NodeSystemLib2.FormatDataFFT.OutputPortDataFFT(this, "out");
_portInp = new NodeSystemLib2.FormatData1D.InputPortData1D(this, "in");
_portInp.SamplerateChanged += (s, e) => _portOut.Samplerate = _portInp.Samplerate;
_attrFFTSize = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueInt(this, "FFT Size", "Samples",
(x) => x < 2 ? 2 : (int)Math.Pow(2, Math.Round(Math.Log(x, 2)))
);
_attrFFTSize.SetRuntimeReadonly();
_attrFFTSize.Changed += (s, e) => _portOut.FFTSize = _attrFFTSize.TypedGet();
_attrFFTSize.Set(512);
}
public DeviceSimulatorPort(Graph g, int portId) : base("Simulator Port", g, UniquenessBy(portId))
{
Id = portId;
_portOut = new OutputPortData1D(this, "Out");
_attrFrequency = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueDouble(this, "Frequency", "Hz");
_attrAmplitude = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueDouble(this, "Amplitude");
_attrSamplerate = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueInt(this, "Samplerate", "Hz");
_attrSignalType = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueEnum <SignalType>(this, "Type");
_attrPeriod = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueInt(this, "Period", "ms");
_attrPhase = new NodeSystemLib2.Generic.NodeAttributes.AttributeValueDouble(this, "Phase", "°");
_attrFrequency.Changed += (s, e) => CalculatePhaseStep();
_attrSamplerate.Changed += (s, e) => _portOut.Samplerate = _attrSamplerate.TypedGet();
_attrSamplerate.SetRuntimeReadonly();
_attrPeriod.SetRuntimeReadonly();
_attrFrequency.Set(100000);
_attrAmplitude.Set(1);
_attrPeriod.Set(100);
_attrSamplerate.Set(1000000);
}