diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/sample_selection.cc | 32 |
1 files changed, 6 insertions, 26 deletions
diff --git a/src/sample_selection.cc b/src/sample_selection.cc index 8f751b3..caf3bdd 100644 --- a/src/sample_selection.cc +++ b/src/sample_selection.cc @@ -150,8 +150,6 @@ const Sample* SampleSelection::getOld(level_t level, std::size_t pos) const Sample* SampleSelection::getObjective(level_t level, std::size_t pos) { - auto velocity_stddev = settings.velocity_stddev.load(); - const auto& samples = powerlist.getPowerListItems(); if(!samples.size()) { @@ -162,18 +160,10 @@ const Sample* SampleSelection::getObjective(level_t level, std::size_t pos) auto power_min = powerlist.getMinPower(); float power_span = power_max - power_min; - // Width is limited to at least 10. Fixes problem with instrument with a - // sample set smaller than MIN_SAMPLE_SET_SIZE. - float width = std::max(samples.size(), MIN_SAMPLE_SET_SIZE); - - // Spread out at most ~2 samples away from center if all samples have a - // uniform distribution over the power spectrum (which they probably don't). - float mean_stepwidth = power_span / width; - - // Cut off mean value with stddev/2 in both ends in order to make room for - // downwards expansion on velocity 0 and upwards expansion on velocity 1. - float mean = level * (power_span - mean_stepwidth) + (mean_stepwidth / 2.0); - float stddev = settings.enable_velocity_modifier.load() ? velocity_stddev * mean_stepwidth : 0.; + float mean = level; + float stddev = settings.enable_velocity_modifier.load() ? + settings.velocity_stddev.load()/127.0f : 0.; + float lvl = power_min + rand.normalDistribution(mean, stddev)*power_span; std::size_t index_opt = 0; float power_opt{0.f}; @@ -183,18 +173,8 @@ const Sample* SampleSelection::getObjective(level_t level, std::size_t pos) float distance_opt = 0.; float recent_opt = 0.; - // TODO: check how much sense all of this actually makes - // Select normal distributed value between - // (stddev/2) and (power_span-stddev/2) - float lvl = rand.normalDistribution(mean, stddev); - - // Adjust this value to be in range - // (power_min+stddev/2) and (power_max-stddev/2) - lvl += power_min; - - DEBUG(rand, "level: %f, lvl: %f (mean: %.2f, stddev: %.2f, mean_stepwidth: %f," - "power_min: %f, power_max: %f)\n", level, lvl, mean, stddev, mean_stepwidth, - power_min, power_max); + DEBUG(rand, "level: %f, lvl: %f (mean: %.2f, stddev: %.2f," + "power_min: %f, power_max: %f)\n", level, lvl, mean, stddev, power_min, power_max); float alpha = 2.0; float beta = 1.0; |