diff options
| -rw-r--r-- | src/powerlist.cc | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/src/powerlist.cc b/src/powerlist.cc index 4aa916a..94a63fa 100644 --- a/src/powerlist.cc +++ b/src/powerlist.cc @@ -72,20 +72,20 @@ void PowerList::add(Sample* sample) Channel* PowerList::getMasterChannel() { std::map<Channel*, int> count; - + for (auto& item: samples) { Sample* sample{item.sample}; Channel* max_channel{nullptr}; sample_t max_val{0}; - + for (auto& pair: sample->audiofiles) { Channel* c = pair.first; AudioFile* af = pair.second; - + af->load(SIZE); - + float silence{0.f}; std::size_t silence_length{4u}; for (auto s = af->size; s > 0 && s > af->size - silence_length; --s) @@ -93,7 +93,7 @@ Channel* PowerList::getMasterChannel() silence += af->data[s]; } silence /= silence_length; - + for(auto s = 0u; s < af->size; ++s) { float val = af->data[s] * af->data[s] * (1.0 / (float)(s + 1)); @@ -104,7 +104,7 @@ Channel* PowerList::getMasterChannel() break; } } - + af->unload(); } @@ -117,10 +117,10 @@ Channel* PowerList::getMasterChannel() ++count[max_channel]; } } - + Channel* master{nullptr}; int max_count{-1}; - + for (auto& pair: count) { if (pair.second > max_count && pair.first->name.find("Alesis") == 0u) @@ -129,7 +129,7 @@ Channel* PowerList::getMasterChannel() max_count = pair.second; } } - + return master; } @@ -137,24 +137,24 @@ void PowerList::finalise() { #ifdef AUTO_CALCULATE_POWER Channel* master_channel = getMasterChannel(); - + if(master_channel == nullptr) { ERR(rand, "No master channel found!\n"); return; // This should not happen... } - + DEBUG(rand, "Master channel: %s\n", master_channel->name.c_str()); #endif /*AUTO_CALCULATE_POWER*/ - + for (auto& item: samples) { Sample* sample = item.sample; #ifdef AUTO_CALCULATE_POWER DEBUG(rand, "Sample: %s\n", sample->name.c_str()); - + AudioFile* master{nullptr}; - + for (auto& af: sample->audiofiles) { if (af.first->name == master_channel->name) @@ -163,15 +163,15 @@ void PowerList::finalise() break; } } - + if(master == nullptr) { continue; } - + master->load(); #endif /*AUTO_CALCULATE_POWER*/ - + #ifdef AUTO_CALCULATE_POWER if(sample->power == -1) { // Power not defined. Calculate it! @@ -182,15 +182,15 @@ void PowerList::finalise() { power += master->data[s] * master->data[s]; } - + power = sqrt(power); - + sample->power = power; } #endif /*AUTO_CALCULATE_POWER*/ - + item.power = sample->power; - + if(item.power > power_max) { power_max = item.power; @@ -199,7 +199,7 @@ void PowerList::finalise() { power_min = item.power; } - + DEBUG(rand, " - power: %f\n", item.power); } } @@ -210,43 +210,43 @@ Sample* PowerList::get(level_t level) { return nullptr; // No samples to choose from. } - + int retry = 3; // TODO: This must be user controllable via the UI. - + Sample* sample{nullptr}; - + float power_span = power_max - power_min; - + // Width is limited to at least 10. Fioxes problem with instrument with a // sample set smaller than MIN_SAMPLE_SET_SIZE. float width = fmax(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 stddev = 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 - stddev) + (stddev / 2.0); - + float power{0.f}; - + // note: loop is executed once + #retry do { --retry; - + // 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)\n", level, lvl, mean, stddev); - + for (auto& item: samples) { if (sample == nullptr || std::fabs(item.power - lvl) < std::fabs(power - lvl)) @@ -256,10 +256,10 @@ Sample* PowerList::get(level_t level) } } } while (lastsample == sample && retry >= 0); - + DEBUG(rand, "Found sample with power %f\n", power); - + lastsample = sample; - + return sample; } |