void FastRoexBank::processInternal(const SignalBank &input)
{
for (int ear = 0; ear < input.getNEars(); ++ear)
{
/*
* Part 1: Obtain the level per ERB about each input component
*/
int nChannels = input.getNChannels();
const Real* inputPowerSpectrum = input.getSingleSampleReadPointer (ear, 0);
Real* outputExcitationPattern = output_.getSingleSampleWritePointer (ear, 0);
Real runningSum = 0.0;
int j = 0;
int k = rectBinIndices_[0][0];
for (int i = 0; i < nChannels; ++i)
{
//running sum of component powers
while (j < rectBinIndices_[i][1])
runningSum += inputPowerSpectrum[j++];
//subtract components outside the window
while (k < rectBinIndices_[i][0])
runningSum -= inputPowerSpectrum[k++];
//convert to dB, subtract 51 here to save operations later
compLevel_[i] = powerToDecibels (runningSum, 1e-10, -100.0) - 51;
}
/*
* Part 2: Complete roex filter response and compute excitation per ERB
*/
Real g = 0.0, p = 0.0, pg = 0.0, excitationLin = 0.0;
int idx = 0;
for (int i = 0; i < nFilters_; ++i)
{
excitationLin = 0.0;
j = 0;
while (j < nChannels)
{
//normalised deviation
g = (input.getCentreFreq(j) - fc_[i]) / fc_[i];
if (g > 2)
break;
if (g < 0) //lower skirt - level dependent
{
//Complete Eq (3)
p = pu_[i] - (pl_[i] * compLevel_[j]); //51dB subtracted above
p = max(p, 0.1); //p can go negative for very high levels
pg = -p * g; //p * abs (g)
}
else //upper skirt
{
pg = pu_[i] * g; //p * abs(g)
}
//excitation
idx = (int)(pg / step_ + 0.5);
idx = min (idx, roexIdxLimit_);
excitationLin += roexTable_[idx] * inputPowerSpectrum[j++];
}
//excitation level
if (isExcitationPatternInterpolated_)
excitationLevel_[i] = log (excitationLin + 1e-10);
else
outputExcitationPattern[i] = excitationLin;
}
/*
* Part 3: Interpolate to estimate
* 0.1~Cam res excitation pattern
*/
if (isExcitationPatternInterpolated_)
{
spline_.set_points (cams_,
excitationLevel_,
isInterpolationCubic_);
for (int i = 0; i < 372; ++i)
{
excitationLin = exp (spline_ (1.8 + i * 0.1));
outputExcitationPattern[i] = excitationLin;
}
}
}
}
void RoexBankANSIS342007::processInternal(const SignalBank &input)
{
for (int src = 0; src < input.getNSources(); ++src)
{
for (int ear = 0; ear < input.getNEars(); ++ear)
{
Real excitationLin = 0.0, fc = 0.0, g = 0.0, p = 0.0, pg = 0.0;
int nChannels = input.getNChannels();
const Real* inputPowerSpectrum = input
.getSingleSampleReadPointer
(src, ear, 0);
Real* outputExcitationPattern = output_.
getSingleSampleWritePointer
(src, ear, 0);
//ANSI 2007 style: calculate level per ERB
//using level independent roex filters centred on every component
int j = 0;
for (int i = 0; i < nChannels; ++i)
{
excitationLin = 0.0;
j = 0;
fc = input.getCentreFreq(i);
while (j < nChannels)
{
//normalised deviation
g = (input.getCentreFreq(j) - fc) / fc;
if (g > 2)
break;
if (g < 0) //lower value
pg = -pcomp_[i] * g; //p*abs(g)
else //upper value
pg = pcomp_[i] * g;
//excitation per erb
excitationLin += (1 + pg) * exp (-pg) * inputPowerSpectrum[j++];
}
//convert to dB, subtract 51 here to save operations later
compLevel_[i] = powerToDecibels (excitationLin, 1e-10, -100.0) - 51;
}
//now the excitation pattern
for (int i = 0; i < nFilters_; ++i)
{
excitationLin = 0.0;
j = 0;
fc = output_.getCentreFreq(i);
while (j < nChannels)
{
//normalised deviation
g = (input.getCentreFreq(j) - fc) / fc;
if (g > 2)
break;
if (g < 0) //lower value
{
//checked out 2.4.14
p = pu_[i] - (pl_[i] * compLevel_[j]); //51dB subtracted above
p = max(0.1, p); //p can go negative for very high levels
pg = -p * g; //p*abs(g)
}
else //upper value
{
pg = pu_[i] * g;
}
excitationLin += (1 + pg) * exp(-pg) * inputPowerSpectrum[j++];
}
outputExcitationPattern[i] = excitationLin;
}
}
}
}