public unsafe void Configure(double sampleRate, int decimationStageCount)
{
int num = (int)Math.Pow(2.0, (double)decimationStageCount);
if (this._sampleRate != sampleRate || this._audioDecimationFactor != num)
{
this._sampleRate = sampleRate;
this._pilotFilterBuffer = UnsafeBuffer.Create(sizeof(IirFilter));
this._pilotFilter = (IirFilter *)(void *)this._pilotFilterBuffer;
this._pilotFilter->Init(IirFilterType.BandPass, 19000.0, this._sampleRate, 500);
this._pll->SampleRate = (float)this._sampleRate;
this._pll->DefaultFrequency = 19000f;
this._pll->Range = 20f;
this._pll->Bandwidth = 10f;
this._pll->Zeta = 0.707f;
this._pll->PhaseAdjM = StereoDecoder._pllPhaseAdjM;
this._pll->PhaseAdjB = StereoDecoder._pllPhaseAdjB;
this._pll->LockTime = 0.5f;
this._pll->LockThreshold = 1f;
double num2 = sampleRate / (double)num;
float[] coefficients = FilterBuilder.MakeBandPassKernel(num2, 250, 20.0, 16000.0, WindowType.BlackmanHarris4);
this._channelAFilter = new FirFilter(coefficients, 1);
this._channelBFilter = new FirFilter(coefficients, 1);
this._deemphasisAlpha = (float)(1.0 - Math.Exp(-1.0 / (num2 * (double)StereoDecoder._deemphasisTime)));
this._deemphasisAvgL = 0f;
this._deemphasisAvgR = 0f;
}
if (this._channelADecimator != null && this._channelBDecimator != null && this._audioDecimationFactor == num)
{
return;
}
this._channelADecimator = new FloatDecimator(decimationStageCount);
this._channelBDecimator = new FloatDecimator(decimationStageCount);
this._audioDecimationFactor = num;
}
public unsafe void Configure(double sampleRate, int decimationStageCount)
{
this._audioDecimationRatio = 1 << decimationStageCount;
if (this._sampleRate != sampleRate)
{
this._sampleRate = sampleRate;
this._pilotFilterBuffer = UnsafeBuffer.Create(sizeof(IirFilter));
this._pilotFilter = (IirFilter *)(void *)this._pilotFilterBuffer;
this._pilotFilter->Init(IirFilterType.BandPass, 19000.0, this._sampleRate, 500.0);
this._pll->SampleRate = (float)this._sampleRate;
this._pll->DefaultFrequency = 19000f;
this._pll->Range = 20f;
this._pll->Bandwidth = 10f;
this._pll->Zeta = 0.707f;
this._pll->PhaseAdjM = StereoDecoder._pllPhaseAdjM;
this._pll->PhaseAdjB = StereoDecoder._pllPhaseAdjB;
this._pll->LockTime = 0.5f;
this._pll->LockThreshold = 1f;
double num = sampleRate / (double)this._audioDecimationRatio;
Complex[] kernel = FilterBuilder.MakeComplexKernel(num, 250, Math.Min(0.9 * num, 30000.0), 0.0, WindowType.BlackmanHarris4);
this._channelAFilter = new ComplexFilter(kernel);
this._channelBFilter = new ComplexFilter(kernel);
this._deemphasisAlpha = (float)(1.0 - Math.Exp(-1.0 / (num * (double)StereoDecoder._deemphasisTime)));
this._deemphasisAvgL = 0f;
this._deemphasisAvgR = 0f;
}
if (this._channelADecimator != null && this._channelBDecimator != null && this._audioDecimationRatio == this._channelADecimator.DecimationRatio)
{
return;
}
this._channelADecimator = new FloatDecimator(this._audioDecimationRatio);
this._channelBDecimator = new FloatDecimator(this._audioDecimationRatio);
}
public void Dispose()
{
if (this._dec != IntPtr.Zero)
{
FloatDecimator.float_decimator_destroy(this._dec);
this._dec = IntPtr.Zero;
}
}
public IQDecimator(int stageCount, double samplerate, bool useFastFilters, bool isMultithreaded)
{
_isMultithreaded = isMultithreaded;
int childThreads;
if (_isMultithreaded)
{
childThreads = Environment.ProcessorCount / 2;
}
else
{
childThreads = 1;
}
var filterType = useFastFilters ? DecimationFilterType.Fast : DecimationFilterType.Baseband;
_rDecimator = new FloatDecimator(stageCount, samplerate, filterType, childThreads);
_iDecimator = new FloatDecimator(stageCount, samplerate, filterType, childThreads);
}
public void Configure(double sampleRate, int decimationStageCount)
{
_audioDecimationFactor = (int)Math.Pow(2.0, decimationStageCount);
if (_sampleRate != sampleRate)
{
_sampleRate = sampleRate;
_pilotFilterBuffer = UnsafeBuffer.Create(sizeof(IirFilter));
_pilotFilter = (IirFilter *)_pilotFilterBuffer;
_pilotFilter->Init(IirFilterType.BandPass, DefaultPilotFrequency, _sampleRate, 500);
_pll->SampleRate = (float)_sampleRate;
_pll->DefaultFrequency = DefaultPilotFrequency;
_pll->Range = PllRange;
_pll->Bandwidth = PllBandwith;
_pll->Zeta = PllZeta;
_pll->PhaseAdjM = _pllPhaseAdjM;
_pll->PhaseAdjB = _pllPhaseAdjB;
_pll->LockTime = PllLockTime;
_pll->LockThreshold = PllThreshold;
var outputSampleRate = sampleRate / _audioDecimationFactor;
var coefficients = FilterBuilder.MakeBandPassKernel(outputSampleRate, 250, Vfo.MinBCAudioFrequency, Vfo.MaxBCAudioFrequency, WindowType.BlackmanHarris4);
_channelAFilter = new FirFilter(coefficients, 1);
_channelBFilter = new FirFilter(coefficients, 1);
_deemphasisAlpha = (float)(1.0 - Math.Exp(-1.0 / (outputSampleRate * _deemphasisTime)));
_deemphasisAvgL = 0;
_deemphasisAvgR = 0;
}
if (_channelADecimator == null || _channelBDecimator == null || decimationStageCount != _channelADecimator.StageCount)
{
_channelADecimator = new FloatDecimator(decimationStageCount);
_channelBDecimator = new FloatDecimator(decimationStageCount);
}
}
public void Configure(double sampleRate, int decimationStageCount)
{
_audioDecimationFactor = (int) Math.Pow(2.0, decimationStageCount);
if (_sampleRate != sampleRate)
{
_sampleRate = sampleRate;
_pilotFilterBuffer = UnsafeBuffer.Create(sizeof(IirFilter));
_pilotFilter = (IirFilter*) _pilotFilterBuffer;
_pilotFilter->Init(IirFilterType.BandPass, DefaultPilotFrequency, _sampleRate, 500);
_pll->SampleRate = (float) _sampleRate;
_pll->DefaultFrequency = DefaultPilotFrequency;
_pll->Range = PllRange;
_pll->Bandwidth = PllBandwith;
_pll->Zeta = PllZeta;
_pll->PhaseAdjM = _pllPhaseAdjM;
_pll->PhaseAdjB = _pllPhaseAdjB;
_pll->LockTime = PllLockTime;
_pll->LockThreshold = PllThreshold;
var outputSampleRate = sampleRate / _audioDecimationFactor;
var coefficients = FilterBuilder.MakeBandPassKernel(outputSampleRate, 250, Vfo.MinBCAudioFrequency, Vfo.MaxBCAudioFrequency, WindowType.BlackmanHarris4);
_channelAFilter = new FirFilter(coefficients, 1);
_channelBFilter = new FirFilter(coefficients, 1);
_deemphasisAlpha = (float) (1.0 - Math.Exp(-1.0 / (outputSampleRate * _deemphasisTime)));
_deemphasisAvgL = 0;
_deemphasisAvgR = 0;
}
if (_channelADecimator == null || _channelBDecimator == null || decimationStageCount != _channelADecimator.StageCount)
{
_channelADecimator = new FloatDecimator(decimationStageCount);
_channelBDecimator = new FloatDecimator(decimationStageCount);
}
}
public IQDecimator(int stageCount, double samplerate, bool useFastFilters, bool isMultithreaded)
{
_isMultithreaded = isMultithreaded;
int childThreads;
if (_isMultithreaded)
{
childThreads = Environment.ProcessorCount / 2;
}
else
{
childThreads = 1;
}
var filterType = useFastFilters ? DecimationFilterType.Fast : DecimationFilterType.Baseband;
_rDecimator = new FloatDecimator(stageCount, samplerate, filterType, childThreads);
_iDecimator = new FloatDecimator(stageCount, samplerate, filterType, childThreads);
}
public unsafe int Process(float *buffer, int length)
{
return(FloatDecimator.float_decimator_process(this._dec, buffer, length));
}
public FloatDecimator(int decimationRatio)
{
this._decimationRatio = decimationRatio;
this._dec = FloatDecimator.float_decimator_create(decimationRatio);
}
public IQDecimator(int stageCount, bool highDynamicRange = true, float quality = 1f, bool isMultithreaded = false)
{
this._isMultithreaded = isMultithreaded;
this._rDecimator = new FloatDecimator(stageCount, highDynamicRange, quality);
this._iDecimator = new FloatDecimator(stageCount, highDynamicRange, quality);
}
public unsafe void Configure(double sampleRate, int decimationStageCount)
{
this._audioDecimationFactor = (int) Math.Pow(2.0, (double) decimationStageCount);
if (this._sampleRate != sampleRate)
{
this._sampleRate = sampleRate;
this._pilotFilterBuffer = UnsafeBuffer.Create(sizeof (IirFilter));
this._pilotFilter = (IirFilter*) (void*) this._pilotFilterBuffer;
this._pilotFilter->Init(IirFilterType.BandPass, 19000.0, this._sampleRate, 500.0);
this._pll->SampleRate = (float) this._sampleRate;
this._pll->DefaultFrequency = 19000f;
this._pll->Range = 20f;
this._pll->Bandwidth = 10f;
this._pll->Zeta = 0.707f;
this._pll->PhaseAdjM = StereoDecoder._pllPhaseAdjM;
this._pll->PhaseAdjB = StereoDecoder._pllPhaseAdjB;
this._pll->LockTime = 0.5f;
this._pll->LockThreshold = 1f;
double sampleRate1 = sampleRate / (double) this._audioDecimationFactor;
float[] coefficients = FilterBuilder.MakeBandPassKernel(sampleRate1, 250, 20.0, 15500.0, WindowType.BlackmanHarris4);
this._channelAFilter = new FirFilter(coefficients, 1);
this._channelBFilter = new FirFilter(coefficients, 1);
this._deemphasisAlpha = (float) (1.0 - Math.Exp(-1.0 / (sampleRate1 * (double) StereoDecoder._deemphasisTime)));
this._deemphasisAvgL = 0.0f;
this._deemphasisAvgR = 0.0f;
}
if (this._channelADecimator != null && this._channelBDecimator != null && decimationStageCount == this._channelADecimator.StageCount)
return;
this._channelADecimator = new FloatDecimator(decimationStageCount, false, 1f);
this._channelBDecimator = new FloatDecimator(decimationStageCount, false, 1f);
}
