diff options
Diffstat (limited to 'src/powerlist.cc')
| -rw-r--r-- | src/powerlist.cc | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/powerlist.cc b/src/powerlist.cc index 1888733..6fc77ad 100644 --- a/src/powerlist.cc +++ b/src/powerlist.cc @@ -32,6 +32,14 @@ #include <hugin.hpp> +/** + * Minimum sample set size. + * Smaller means wider 'velocity groups'. + * Limited by sample set size, ie. only kicks in if sample set size is smaller + * than this number. + */ +#define MIN_SAMPLE_SET_SIZE 26 + // Enable to calculate power on old samples without power attribute //#define AUTO_CALCULATE_POWER @@ -213,8 +221,13 @@ Sample *PowerList::get(level_t level) float power_span = power_max - power_min; - // Spread out at most 1.5 samples away from center - float stddev = power_span / samples.size() * 1.5; + // 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. |