sva_samples/measure/
mod.rs

1// Concern: groups the readings taken off samples, and declares the three things one can consume | Non-concern: which reading consumes which (sva-engine's query.rs) | IO: none
2
3pub mod alias;
4pub mod bands;
5pub mod crest;
6pub mod envelope;
7pub mod formants;
8pub mod harmony;
9pub mod ledger;
10pub mod loudness;
11pub mod modulation;
12pub mod onsets;
13pub mod periodicity;
14pub mod pitch;
15pub mod self_similarity;
16pub mod sliding;
17pub mod spectrum;
18pub mod stereo;
19
20pub(crate) fn held(planes: &[&[f64]]) -> usize {
21    let len = planes
22        .first()
23        .expect("a reading reads at least one channel")
24        .len();
25    assert!(
26        planes.iter().all(|p| p.len() == len),
27        "a reading's channels are one length"
28    );
29    len
30}
31
32/// Every channel in power, as `envelope` reads it: summed, then divided by the count.
33pub(crate) fn averaged(per_channel: Vec<Vec<f64>>) -> Vec<f64> {
34    let count = per_channel.len() as f64;
35    let mut each = per_channel.into_iter();
36    let mut out = each.next().unwrap_or_default();
37    for more in each {
38        for (sum, x) in out.iter_mut().zip(more) {
39            *sum += x;
40        }
41    }
42    out.iter_mut().for_each(|sum| *sum /= count);
43    out
44}
45
46#[derive(Clone, Copy, Debug, PartialEq, Eq)]
47pub enum Consumes {
48    ClosedForm,
49    Buffer,
50    Frames,
51}
sva_samples/measure/mod.rs

sva_samples/measure/
mod.rs
