private unsafe void Configure()
{
this._osc.SampleRate = this._sampleRate;
this._osc.Frequency = 57000.0;
int i;
for (i = 0; this._sampleRate >= (double)(20000 << i); i++)
{
}
this._decimationFactor = 1 << i;
this._demodulationSampleRate = this._sampleRate / (double)this._decimationFactor;
this._decimator = new DownConverter(this._demodulationSampleRate, this._decimationFactor);
float[] coefficients = FilterBuilder.MakeLowPassKernel(this._demodulationSampleRate, 200, 2500.0, WindowType.BlackmanHarris4);
this._baseBandFilter = new IQFirFilter(coefficients, 1);
this._pll->SampleRate = (float)this._demodulationSampleRate;
this._pll->DefaultFrequency = 0f;
this._pll->Range = 12f;
this._pll->Bandwidth = 1f;
this._pll->Zeta = 0.707f;
this._pll->LockTime = 0.5f;
this._pll->LockThreshold = 3.2f;
int length = (int)(this._demodulationSampleRate / 1187.5) | 1;
coefficients = FilterBuilder.MakeSin(this._demodulationSampleRate, 1187.5, length);
this._matchedFilter = new FirFilter(coefficients, 1);
this._syncFilter->Init(IirFilterType.BandPass, 1187.5, this._demodulationSampleRate, 500.0);
}
public void Dispose()
{
if (this._dec != IntPtr.Zero)
{
DownConverter.ddc_destroy(this._dec);
this._dec = IntPtr.Zero;
}
}
private void Configure(bool refreshOnly = true)
{
if (this._sampleRate != 0.0)
{
this._actualDetectorType = this._detectorType;
bool refresh = false;
this._baseBandDecimationStageCount = StreamControl.GetDecimationStageCount(this._sampleRate, this._actualDetectorType);
this._audioDecimationStageCount = this._decimationStageCount - this._baseBandDecimationStageCount;
int num = 1 << this._baseBandDecimationStageCount;
double num2 = this._sampleRate / (double)num;
if (!refreshOnly || this._mainDownConverter == null || this._mainDownConverter.SampleRate != this._sampleRate || this._mainDownConverter.DecimationRatio != num)
{
this._mainDownConverter = new DownConverter(this._sampleRate, num);
refresh = true;
this.ConfigureHookSampleRates();
}
this._mainDownConverter.Frequency = (double)this._frequency;
if (!refreshOnly || this._ifOffsetTranslator == null || this._ifOffsetTranslator.SampleRate != num2)
{
this._ifOffsetTranslator = new FrequencyTranslator(num2);
}
this._ifOffsetTranslator.Frequency = (double)(-this._ifOffset);
this.UpdateFilters(refresh);
this._carrierLocker.SampleRate = num2;
this._cwDetector.SampleRate = num2;
this._fmDetector.SampleRate = num2;
this._fmDetector.SquelchThreshold = this._squelchThreshold;
this._amDetector.SquelchThreshold = this._squelchThreshold;
this._stereoDecoder.Configure(this._fmDetector.SampleRate, this._audioDecimationStageCount);
this._rdsDecoder.SampleRate = this._fmDetector.SampleRate;
this._stereoDecoder.ForceMono = !this._fmStereo;
switch (this._actualDetectorType)
{
case DetectorType.CW:
this._cwDetector.BfoFrequency = this._cwToneShift;
break;
case DetectorType.NFM:
this._fmDetector.Mode = FmMode.Narrow;
break;
case DetectorType.WFM:
this._fmDetector.Mode = FmMode.Wide;
break;
}
this._agc.SampleRate = this._sampleRate / (double)(1 << this._decimationStageCount);
this._agc.Decay = this._agcDecay;
this._agc.Slope = this._agcSlope;
this._agc.Threshold = this._agcThreshold;
this._agc.UseHang = this._agcUseHang;
this._needConfigure = false;
}
}
private void Configure()
{
_actualDetectorType = _detectorType;
var multiThreaded = _sampleRate >= _minThreadedSampleRate;
if (_downConverter == null || (multiThreaded && _downConverter.PhaseCount > 1))
{
_downConverter = new DownConverter(multiThreaded ? Environment.ProcessorCount : 1);
}
_downConverter.SampleRate = _sampleRate;
_downConverter.Frequency = _frequency;
if (_needNewDecimators || _baseBandDecimator == null)
{
_needNewDecimators = false;
if (_actualDetectorType == DetectorType.WFM)
{
var afSamplerate = _sampleRate / Math.Pow(2.0, _decimationStageCount);
_audioDecimationStageCount = 0;
while (afSamplerate * Math.Pow(2.0, _audioDecimationStageCount) < DefaultWFMBandwidth && _audioDecimationStageCount < _decimationStageCount)
{
_audioDecimationStageCount++;
}
_baseBandDecimationStageCount = _decimationStageCount - _audioDecimationStageCount;
}
else
{
_baseBandDecimationStageCount = _decimationStageCount;
_audioDecimationStageCount = 0;
}
_baseBandDecimator = new IQDecimator(_baseBandDecimationStageCount, _sampleRate, false, Environment.ProcessorCount > 1);
_needNewFilters = true;
}
if (_needNewFilters)
{
_needNewFilters = false;
InitFilters();
}
var baseBandSampleRate = _sampleRate / Math.Pow(2.0, _baseBandDecimationStageCount);
_usbDetector.SampleRate = baseBandSampleRate;
_lsbDetector.SampleRate = baseBandSampleRate;
_cwDetector.SampleRate = baseBandSampleRate;
_fmDetector.SampleRate = baseBandSampleRate;
_fmDetector.SquelchThreshold = _squelchThreshold;
_amDetector.SquelchThreshold = _squelchThreshold;
_stereoDecoder.Configure(_fmDetector.SampleRate, _audioDecimationStageCount);
_rdsDecoder.SampleRate = _fmDetector.SampleRate;
_stereoDecoder.ForceMono = !_fmStereo;
switch (_actualDetectorType)
{
case DetectorType.USB:
_usbDetector.BfoFrequency = -_bandwidth / 2;
_downConverter.Frequency -= _usbDetector.BfoFrequency;
break;
case DetectorType.LSB:
_lsbDetector.BfoFrequency = -_bandwidth / 2;
_downConverter.Frequency += _lsbDetector.BfoFrequency;
break;
case DetectorType.CW:
_cwDetector.BfoFrequency = _cwToneShift;
break;
case DetectorType.NFM:
_fmDetector.Mode = FmMode.Narrow;
break;
case DetectorType.WFM:
_fmDetector.Mode = FmMode.Wide;
break;
}
_agc.SampleRate = _sampleRate / Math.Pow(2.0, _decimationStageCount);
_agc.Decay = _agcDecay;
_agc.Slope = _agcSlope;
_agc.Threshold = _agcThreshold;
_agc.UseHang = _agcUseHang;
_decimationModeHasChanged = false;
}
public unsafe int Process(Complex *buffer, int length)
{
return(DownConverter.ddc_process(this._dec, buffer, length));
}
public DownConverter(double sampleRate, int decimationRatio)
{
this._sampleRate = sampleRate;
this._decimationRatio = decimationRatio;
this._dec = DownConverter.ddc_create(this._sampleRate, this._decimationRatio);
}
private void Configure()
{
_actualDetectorType = _detectorType;
var multiThreaded = _sampleRate >= _minThreadedSampleRate;
if (_downConverter == null || (multiThreaded && _downConverter.PhaseCount > 1))
{
_downConverter = new DownConverter(multiThreaded ? Environment.ProcessorCount : 1);
}
_downConverter.SampleRate = _sampleRate;
_downConverter.Frequency = _frequency;
if (_needNewDecimators || _baseBandDecimator == null)
{
_needNewDecimators = false;
if (_actualDetectorType == DetectorType.WFM)
{
var afSamplerate = _sampleRate / (1 << _decimationStageCount);
_audioDecimationStageCount = 0;
while (afSamplerate * (1 << _audioDecimationStageCount) < DefaultWFMBandwidth && _audioDecimationStageCount < _decimationStageCount)
{
_audioDecimationStageCount++;
}
_baseBandDecimationStageCount = _decimationStageCount - _audioDecimationStageCount;
}
else
{
_baseBandDecimationStageCount = _decimationStageCount;
_audioDecimationStageCount = 0;
}
_baseBandDecimator = new IQDecimator(_baseBandDecimationStageCount, _sampleRate, false, Environment.ProcessorCount > 1);
if (_hookManager != null)
{
_hookManager.SetProcessorSampleRate(ProcessorType.RawIQ, _sampleRate);
_hookManager.SetProcessorSampleRate(ProcessorType.FrequencyTranslatedIQ, _sampleRate);
_hookManager.SetProcessorSampleRate(ProcessorType.DecimatedAndFilteredIQ, _sampleRate / (1 << _baseBandDecimationStageCount));
_hookManager.SetProcessorSampleRate(ProcessorType.DemodulatorOutput, _sampleRate / (1 << _baseBandDecimationStageCount));
_hookManager.SetProcessorSampleRate(ProcessorType.FilteredAudioOutput, _sampleRate / (1 << _decimationStageCount));
}
_needNewFilters = true;
}
if (_needNewFilters)
{
_needNewFilters = false;
InitFilters();
}
var baseBandSampleRate = _sampleRate / (1 << _baseBandDecimationStageCount);
_usbDetector.SampleRate = baseBandSampleRate;
_lsbDetector.SampleRate = baseBandSampleRate;
_cwDetector.SampleRate = baseBandSampleRate;
_fmDetector.SampleRate = baseBandSampleRate;
_fmDetector.SquelchThreshold = _squelchThreshold;
_amDetector.SquelchThreshold = _squelchThreshold;
_stereoDecoder.Configure(_fmDetector.SampleRate, _audioDecimationStageCount);
_rdsDecoder.SampleRate = _fmDetector.SampleRate;
_stereoDecoder.ForceMono = !_fmStereo;
switch (_actualDetectorType)
{
case DetectorType.USB:
_usbDetector.BfoFrequency = -_bandwidth / 2;
_downConverter.Frequency -= _usbDetector.BfoFrequency;
break;
case DetectorType.LSB:
_lsbDetector.BfoFrequency = -_bandwidth / 2;
_downConverter.Frequency += _lsbDetector.BfoFrequency;
break;
case DetectorType.CW:
_cwDetector.BfoFrequency = _cwToneShift;
break;
case DetectorType.NFM:
_fmDetector.Mode = FmMode.Narrow;
break;
case DetectorType.WFM:
_fmDetector.Mode = FmMode.Wide;
break;
}
_agc.SampleRate = _sampleRate / (1 << _decimationStageCount);
_agc.Decay = _agcDecay;
_agc.Slope = _agcSlope;
_agc.Threshold = _agcThreshold;
_agc.UseHang = _agcUseHang;
_decimationModeHasChanged = false;
}
private void Configure()
{
this._actualDetectorType = this._detectorType;
bool flag = this._sampleRate >= this._minThreadedSampleRate;
if (this._downConverter == null || flag && this._downConverter.PhaseCount > 1)
this._downConverter = new DownConverter(flag ? Environment.ProcessorCount : 1);
this._downConverter.SampleRate = this._sampleRate;
this._downConverter.Frequency = (double) this._frequency;
if (this._needNewDecimators || this._baseBandDecimator == null)
{
this._needNewDecimators = false;
if (this._actualDetectorType == DetectorType.WFM)
{
double num = this._sampleRate / (double) (1 << this._decimationStageCount);
this._audioDecimationStageCount = 0;
while (num * (double) (1 << this._audioDecimationStageCount) < 200000.0 && this._audioDecimationStageCount < this._decimationStageCount)
++this._audioDecimationStageCount;
this._baseBandDecimationStageCount = this._decimationStageCount - this._audioDecimationStageCount;
}
else
{
this._baseBandDecimationStageCount = this._decimationStageCount;
this._audioDecimationStageCount = 0;
}
this._baseBandDecimator = new IQDecimator(this._baseBandDecimationStageCount, this._useHighDynamicRangeDecimation, this._actualDetectorType == DetectorType.WFM ? this._wideBandDecimationQuality : this._narrowBandDecimationQuality, Environment.ProcessorCount > 1);
this.ConfigureHookSampleRates();
this._needNewFilters = true;
}
if (this._needNewFilters)
{
this._needNewFilters = false;
this.InitFilters();
}
double num1 = this._sampleRate / (double) (1 << this._baseBandDecimationStageCount);
this._carrierLocker.SampleRate = num1;
this._usbDetector.SampleRate = num1;
this._lsbDetector.SampleRate = num1;
this._cwDetector.SampleRate = num1;
this._fmDetector.SampleRate = num1;
this._fmDetector.SquelchThreshold = this._squelchThreshold;
this._amDetector.SquelchThreshold = this._squelchThreshold;
this._stereoDecoder.Configure(this._fmDetector.SampleRate, this._audioDecimationStageCount);
this._rdsDecoder.SampleRate = this._fmDetector.SampleRate;
this._stereoDecoder.ForceMono = !this._fmStereo;
switch (this._actualDetectorType)
{
case DetectorType.NFM:
this._fmDetector.Mode = FmMode.Narrow;
break;
case DetectorType.WFM:
this._fmDetector.Mode = FmMode.Wide;
break;
case DetectorType.LSB:
this._lsbDetector.BfoFrequency = -this._bandwidth / 2;
this._downConverter.Frequency += (double) this._lsbDetector.BfoFrequency;
break;
case DetectorType.USB:
this._usbDetector.BfoFrequency = -this._bandwidth / 2;
this._downConverter.Frequency -= (double) this._usbDetector.BfoFrequency;
break;
case DetectorType.CW:
this._cwDetector.BfoFrequency = this._cwToneShift;
break;
}
this._agc.SampleRate = this._sampleRate / (double) (1 << this._decimationStageCount);
this._agc.Decay = this._agcDecay;
this._agc.Slope = this._agcSlope;
this._agc.Threshold = this._agcThreshold;
this._agc.UseHang = this._agcUseHang;
this._decimationModeHasChanged = false;
}