sclass FindBest1DHaarFeature extends Best<HamburgerAudioHaarFeature> {
  IAudioSample sample;
  DoubleRange range;
  
  *(IAudioSample *sample) {
    range = sample.bounds();
  }
  
  void tryIt(HamburgerAudioHaarFeature f) {
    if (f == null) ret;
    f.pinOuter(range);
    if (!f.ok()) ret;
    double score = score(f);
    put(f, score);
    put(f.inverted(), -score);
  }
  
  double score(HamburgerAudioHaarFeature f) {
    ret f.get(0);
  }
  
  HamburgerAudioHaarFeature initial() {
    HamburgerAudioHaarFeature feature = new(sample, spreadEvenly(4, range));
    tryIt(feature);
    ret feature;
  }
}