Efficient rendering of waveforms

[Sea_of_Cortez]

@Sea_of_Cortez

So is it using the first mechanism described above? Having read the relevant portion of A Fast Data Structure for Disk-Based Audio Editing (Mazzoni & Dannenberg, Computer Music Journal Summer 2002) I am not so sure… unless the algorithm outlined there no longer applies? Or does Audacity actually do something cleverer?

Well after having done a bit more digging in to the code it seems that the algorithm outlined in the article is implemented in Sequence::GetWaveDisplay, which is called by WaveTrack::GetWaveDisplay, and located in Sequence.cpp.

Chris