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 peaks;
14pub mod periodicity;
15pub mod pitch;
16pub mod self_similarity;
17pub mod sliding;
18pub mod spectrum;
19pub mod stereo;
20pub(crate) mod stiff;
21
22pub(crate) fn held(planes: &[&[f64]]) -> usize {
23    let len = planes
24        .first()
25        .expect("a reading reads at least one channel")
26        .len();
27    assert!(
28        planes.iter().all(|p| p.len() == len),
29        "a reading's channels are one length"
30    );
31    len
32}
33
34/// Every channel in power, as `envelope` reads it: summed, then divided by the count.
35pub(crate) fn averaged(per_channel: Vec<Vec<f64>>) -> Vec<f64> {
36    let count = per_channel.len() as f64;
37    let mut each = per_channel.into_iter();
38    let mut out = each.next().unwrap_or_default();
39    for more in each {
40        for (sum, x) in out.iter_mut().zip(more) {
41            *sum += x;
42        }
43    }
44    out.iter_mut().for_each(|sum| *sum /= count);
45    out
46}
47
48#[derive(Clone, Copy, Debug, PartialEq, Eq)]
49pub enum Consumes {
50    ClosedForm,
51    Buffer,
52    Frames,
53}
sva_samples/measure/mod.rs

sva_samples/measure/
mod.rs
