Method ProcessAudio

Source/ButterworthFilterEffect.cpp:58–98

}

void ButterworthFilterEffect::ProcessAudio(double time, ChannelBuffer* buffer)
{
   PROFILER(ButterworthFilterEffect);

   if (!mEnabled)
      return;

   float bufferSize = buffer->BufferSize();
   mDryBuffer.SetNumActiveChannels(buffer->NumActiveChannels());

   const float fadeOutStart = mFSlider->GetMax() * .75f;
   const float fadeOutEnd = mFSlider->GetMax();
   bool fadeOut = mF > fadeOutStart;
   if (fadeOut)
      mDryBuffer.CopyFrom(buffer);

   for (int i = 0; i < bufferSize; ++i)
   {
      ComputeSliders(i);
      if (mCoefficientsHaveChanged)
      {
         mButterworth[0].Set(mF, mQ);
         for (int ch = 1; ch < buffer->NumActiveChannels(); ++ch)
            mButterworth[ch].CopyCoeffFrom(mButterworth[0]);
         mCoefficientsHaveChanged = false;
      }
      for (int ch = 0; ch < buffer->NumActiveChannels(); ++ch)
         buffer->GetChannel(ch)[i] = mButterworth[ch].Run(buffer->GetChannel(ch)[i]);
   }

   if (fadeOut)
   {
      for (int ch = 0; ch < buffer->NumActiveChannels(); ++ch)
      {
         float dryness = ofMap(mF, fadeOutStart, fadeOutEnd, 0, 1);
         Mult(buffer->GetChannel(ch), 1 - dryness, bufferSize);
         Mult(mDryBuffer.GetChannel(ch), dryness, bufferSize);
         Add(buffer->GetChannel(ch), mDryBuffer.GetChannel(ch), bufferSize);
      }
   }
}

void ButterworthFilterEffect::DrawModule()
{