I seem to be down with AudioThumbnails at the minute but on Linux I get some strange painting behavior. It seems that some gibberish is being painted to the screen? Here's the main waveform, no problem. Loaded from an AudioSampleBuffer:
I then apply a process to the waveform by manipulating the AudioSampleBuffer and calling this code:
void Soundfiler::setWaveform(AudioSampleBuffer buffer) { thumbnail->clear(); thumbnail->reset(2, 44100, buffer.getNumSamples()); thumbnail->addBlock(0, buffer, 0, buffer.getNumSamples()); const Range<double> newRange (0.0, thumbnail->getTotalLength()); scrollbar->setRangeLimits (newRange); setRange (newRange); repaint(); }
The first time around it works and for a simple fade-in I get:
But if I call that exact same process again I get much different results:
Playback confirms that the same fade-in has been applied but the waveform is no longer accurate. On windows and OSX everything works fine, and the thumbnail updates as you would expect. On Linux it's a different story. Any ideas?