Method EnvLinToLog

src/effects/EqualizationBandSliders.cpp:153–198

}

void EqualizationBandSliders::EnvLinToLog(void)
{
   auto &parameters = mCurvesList.mParameters;
   auto &linEnvelope = parameters.mLinEnvelope;
   auto &logEnvelope = parameters.mLogEnvelope;
   const auto &hiFreq = parameters.mHiFreq;

   size_t numPoints = linEnvelope.GetNumberOfPoints();
   if( numPoints == 0 )
   {
      return;
   }

   Doubles when{ numPoints };
   Doubles value{ numPoints };

   logEnvelope.Flatten(0.);
   logEnvelope.SetTrackLen(1.0);
   linEnvelope.GetPoints( when.get(), value.get(), numPoints );
   logEnvelope.Reassign(0., value[0]);
   double loLog = log10(20.);
   double hiLog = log10(hiFreq );
   double denom = hiLog - loLog;
   bool changed = false;

   for (size_t i = 0; i < numPoints; i++)
   {
      if( when[i]*hiFreq  >= 20 )
      {
         // Caution: on Linux, when when == 20, the log calculation rounds
         // to just under zero, which causes an assert error.
         double flog = (log10(when[i]*hiFreq )-loLog)/denom;
         logEnvelope.Insert(std::max(0.0, flog) , value[i]);
      }
      else
      {  //get the first point as close as we can to the last point requested
         changed = true;
         double v = value[i];
         logEnvelope.Insert(0., v);
      }
   }
   logEnvelope.Reassign(1., value[numPoints - 1]);

   if(changed)
      mCurvesList.EnvelopeUpdated(logEnvelope, false);
}

void EqualizationBandSliders::ErrMin(void)
{