Method Process

libraries/lib-builtin-effects/EqualizationBase.cpp:308–363

}

bool EqualizationBase::Process(EffectInstance&, EffectSettings&)
{
   EffectOutputTracks outputs { *mTracks, GetType(), { { mT0, mT1 } } };
   mParameters.CalcFilter();
   bool bGoodResult = true;

   int count = 0;
   for (auto track : outputs.Get().Selected<WaveTrack>())
   {
      double trackStart = track->GetStartTime();
      double trackEnd = track->GetEndTime();
      double t0 = mT0 < trackStart ? trackStart : mT0;
      double t1 = mT1 > trackEnd ? trackEnd : mT1;

      if (t1 > t0)
      {
         auto start = track->TimeToLongSamples(t0);
         auto end = track->TimeToLongSamples(t1);
         auto len = end - start;

         auto pTempTrack = track->EmptyCopy();
         pTempTrack->ConvertToSampleFormat(floatSample);
         auto iter0 = pTempTrack->Channels().begin();

         for (const auto pChannel : track->Channels())
         {
            constexpr auto windowSize = EqualizationFilter::windowSize;
            const auto& M = mParameters.mM;

            wxASSERT(M - 1 < windowSize);
            size_t L = windowSize - (M - 1); // Process L samples at a go
            auto s = start;
            auto idealBlockLen = pChannel->GetMaxBlockSize() * 4;
            if (idealBlockLen % L != 0)
               idealBlockLen += (L - (idealBlockLen % L));
            auto pNewChannel = *iter0++;
            Task task { M, idealBlockLen, *pNewChannel };
            bGoodResult = ProcessOne(task, count, *pChannel, start, len);
            if (!bGoodResult)
               goto done;
         }
         pTempTrack->Flush();
         // Remove trailing data from the temp track
         pTempTrack->Clear(t1 - t0, pTempTrack->GetEndTime());
         track->ClearAndPaste(t0, t1, *pTempTrack, true, true);
      }

      count++;
   }
done:

   if (bGoodResult)
      outputs.Commit();

   return bGoodResult;
}

// EqualizationBase implementation