public IQDecimator(int stageCount, double samplerate, bool useFastFilters, bool isMultithreaded)
{
this._isMultithreaded = (Utils.ProcessorCount > 1);
int threadCount = (!this._isMultithreaded) ? 1 : (Utils.ProcessorCount / 2);
DecimationFilterType filterType = (!useFastFilters) ? DecimationFilterType.Baseband : DecimationFilterType.Fast;
this._rDecimator = new FloatDecimator(stageCount, samplerate, filterType, threadCount);
this._iDecimator = new FloatDecimator(stageCount, samplerate, filterType, threadCount);
}
public FloatDecimator(int stageCount, double samplerate, DecimationFilterType filterType, int threadCount)
{
_stageCount = stageCount;
_threadCount = threadCount;
_cicCount = 0;
var firCount = 0;
switch (filterType)
{
case DecimationFilterType.Fast:
_cicCount = stageCount;
break;
case DecimationFilterType.Audio:
firCount = stageCount;
break;
case DecimationFilterType.Baseband:
while (_cicCount < stageCount && samplerate >= _minimumCICSampleRate)
{
_cicCount++;
samplerate /= 2;
}
firCount = stageCount - _cicCount;
break;
}
_cicDecimatorsBuffer = UnsafeBuffer.Create(_threadCount * _cicCount, sizeof(CicDecimator));
_cicDecimators = (CicDecimator *)_cicDecimatorsBuffer;
for (var i = 0; i < _threadCount; i++)
{
for (var j = 0; j < _cicCount; j++)
{
_cicDecimators[i * _cicCount + j] = new CicDecimator();
}
}
_firFilters = new FirFilter[firCount];
for (var i = 0; i < firCount; i++)
{
_firFilters[i] = new FirFilter(DecimationKernels.Kernel51, 2);
}
}
public unsafe FloatDecimator(int stageCount, double samplerate, DecimationFilterType filterType, int threadCount)
{
this._stageCount = stageCount;
this._threadCount = threadCount;
this._cicCount = 0;
int num = 0;
switch (filterType)
{
case DecimationFilterType.Fast:
this._cicCount = stageCount;
break;
case DecimationFilterType.Audio:
num = stageCount;
break;
case DecimationFilterType.Baseband:
while (this._cicCount < stageCount && samplerate >= FloatDecimator._minimumCICSampleRate)
{
this._cicCount++;
samplerate /= 2.0;
}
num = stageCount - this._cicCount;
break;
}
this._cicDecimatorsBuffer = UnsafeBuffer.Create(this._threadCount * this._cicCount, sizeof(CicDecimator));
this._cicDecimators = (CicDecimator *)(void *)this._cicDecimatorsBuffer;
for (int i = 0; i < this._threadCount; i++)
{
for (int j = 0; j < this._cicCount; j++)
{
this._cicDecimators[i * this._cicCount + j] = default(CicDecimator);
}
}
this._firFilters = new FirFilter[num];
for (int k = 0; k < num; k++)
{
this._firFilters[k] = new FirFilter(DecimationKernels.Kernel51, 2);
}
}
public FloatDecimator(int stageCount, double samplerate, DecimationFilterType filterType) :
this(stageCount, samplerate, filterType, 1)
{
}
public FloatDecimator(int stageCount, double samplerate, DecimationFilterType filterType, int threadCount)
{
_stageCount = stageCount;
_threadCount = threadCount;
_cicCount = 0;
var firCount = 0;
switch (filterType)
{
case DecimationFilterType.Fast:
_cicCount = stageCount;
break;
case DecimationFilterType.Audio:
firCount = stageCount;
break;
case DecimationFilterType.Baseband:
while (_cicCount < stageCount && samplerate >= _minimumCICSampleRate)
{
_cicCount++;
samplerate /= 2;
}
firCount = stageCount - _cicCount;
break;
}
_cicDecimatorsBuffer = UnsafeBuffer.Create(_threadCount * _cicCount, sizeof(CicDecimator));
_cicDecimators = (CicDecimator*)_cicDecimatorsBuffer;
for (var i = 0; i < _threadCount; i++)
{
for (var j = 0; j < _cicCount; j++)
{
_cicDecimators[i * _cicCount + j] = new CicDecimator();
}
}
_firFilters = new FirFilter[firCount];
for (var i = 0; i < firCount; i++)
{
_firFilters[i] = new FirFilter(DecimationKernels.Kernel51, 2);
}
}
public FloatDecimator(int stageCount, double samplerate, DecimationFilterType filterType) :
this(stageCount, samplerate, filterType, 1)
{
}