Method Process

libraries/lib-builtin-effects/SBSMSBase.cpp:226–428

}

bool SBSMSBase::Process(EffectInstance &, EffectSettings &)
{
   bool bGoodResult = true;

   //Iterate over each track
   //all needed because this effect needs to introduce silence in the group tracks to keep sync
   EffectOutputTracks outputs { *mTracks, GetType(), { { mT0, mT1 } }, true };
   mCurTrackNum = 0;

   double maxDuration = 0.0;

   Slide rateSlide(rateSlideType,rateStart,rateEnd);
   Slide pitchSlide(pitchSlideType,pitchStart,pitchEnd);
   mTotalStretch = rateSlide.getTotalStretch();

   outputs.Get().Any().VisitWhile(bGoodResult,
      [&](auto &&fallthrough){ return [&](LabelTrack &lt) {
         if (!(lt.GetSelected() || SyncLock::IsSyncLockSelected(lt)))
            return fallthrough();
         if (!ProcessLabelTrack(&lt))
            bGoodResult = false;
      }; },
      [&](auto &&fallthrough){ return [&](WaveTrack &track) {
         if (!track.GetSelected())
            return fallthrough();

         if (!track.NIntervals())
            return fallthrough();

         // Process only if the right marker is to the right of the left marker
         if (mT1 > mT0) {
            const auto start = track.TimeToLongSamples(mT0);
            const auto end = track.TimeToLongSamples(mT1);

            // TODO: more-than-two-channels
            auto channels = track.Channels();
            const auto leftTrack = (*channels.begin()).get();
            const auto rightTrack = (channels.size() > 1)
               ? (* ++ channels.first).get()
               : nullptr;
            if (rightTrack)
               mCurTrackNum++; // Increment for rightTrack, too.

            // SBSMS has a fixed sample rate - we just convert to its sample
            // rate and then convert back
            const float srTrack = track.GetRate();
            const float srProcess = bLinkRatePitch ? srTrack : 44100.0;

            // the resampler needs a callback to supply its samples
            ResampleBuf rb;
            const auto maxBlockSize = track.GetMaxBlockSize();
            rb.blockSize = maxBlockSize;
            rb.buf.reinit(rb.blockSize, true);
            rb.leftTrack = leftTrack;
            rb.rightTrack = rightTrack ? rightTrack : leftTrack;
            rb.leftBuffer.reinit(maxBlockSize, true);
            rb.rightBuffer.reinit(maxBlockSize, true);