public void Open()
{
this._airspyDevice = new AirspyDevice(false);
this._airspyDevice.Frequency = (uint)this._frequency;
this._gui.Device = this._airspyDevice;
this._airspyDevice.ComplexSamplesAvailable += this.AirSpyDevice_SamplesAvailable;
this._airspyDevice.SampleRateChanged += this.AirSpyDevice_SampleRateChanged;
this._gui.RefreshTimerEnabled = true;
}
public void Close()
{
if (this._airspyDevice != null)
{
this._gui.RefreshTimerEnabled = false;
this._gui.SaveSettings();
this._gui.Device = null;
this._airspyDevice.ComplexSamplesAvailable -= this.AirSpyDevice_SamplesAvailable;
this._airspyDevice.SampleRateChanged -= this.AirSpyDevice_SampleRateChanged;
this._airspyDevice.Dispose();
this._airspyDevice = null;
}
}
private unsafe static int AirSpySamplesAvailable(airspy_transfer *data)
{
int num = data->sample_count;
ulong dropped_samples = data->dropped_samples;
IntPtr ctx = data->ctx;
GCHandle gCHandle = GCHandle.FromIntPtr(ctx);
if (!gCHandle.IsAllocated)
{
return(-1);
}
AirspyDevice airspyDevice = (AirspyDevice)gCHandle.Target;
if (data->sample_type == airspy_sample_type.AIRSPY_SAMPLE_FLOAT32_REAL)
{
float *samples = (float *)data->samples;
airspyDevice.OnRealSamplesAvailable(samples, num, dropped_samples);
}
else
{
Complex *samples2 = (Complex *)data->samples;
bool flag = airspyDevice._analogFilterConfig != null && airspyDevice._analogFilterConfig.Shift != 0;
if (airspyDevice._decimationStages > 0)
{
airspyDevice.UpdateDDC();
num = airspyDevice._ddc.Process(samples2, num);
}
if (!flag)
{
float num2 = airspyDevice._iavg;
float num3 = airspyDevice._qavg;
float alpha = airspyDevice._alpha;
for (int i = 0; i < num; i++)
{
num2 += alpha * (samples2[i].Real - num2);
num3 += alpha * (samples2[i].Imag - num3);
samples2[i].Real -= num2;
samples2[i].Imag -= num3;
}
airspyDevice._iavg = num2;
airspyDevice._qavg = num3;
}
airspyDevice.OnComplexSamplesAvailable(samples2, num, dropped_samples);
}
return(0);
}