sample 0.10.0

A crate providing the fundamentals for working with audio PCM DSP.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

extern crate sample;

use sample::frame::Frame;
use sample::window::Windower;

#[test]
fn test_window_at_phase() {
    let window = sample::window::hanning::<[f64; 1]>(9);
    let expected = [
        0.0,
        0.1464,
        0.5000,
        0.8536,
        1.,
        0.8536,
        0.5000,
        0.1464,
        0.,
        0.1464,
    ];
    for (r, e) in window.zip(&expected) {
        println!("Expected: {}\t\tFound: {}", e, r[0]);
        assert!((r[0] - e).abs() < 0.001);
    }
}

#[test]
fn test_windower() {
    let data = [[0.1f64], [0.1], [0.2], [0.2], [0.3], [0.3], [0.4], [0.4]];
    let expected = [
        [[0.1], [0.1]],
        [[0.1], [0.2]],
        [[0.2], [0.2]],
        [[0.2], [0.3]],
        [[0.3], [0.3]],
        [[0.3], [0.4]],
        [[0.4], [0.4]],
    ];
    let windower = Windower::rectangle(&data, 2, 1);
    for (chunk, expected_chunk) in windower.zip(&expected) {
        for (r, e) in chunk.zip(expected_chunk.iter()) {
            for (r_chan, e_chan) in r.channels().zip(e.channels()) {
                println!("Expected: {}\t\tFound: {}", e_chan, r_chan);
                assert!((r_chan - e_chan).abs() < 0.001);
            }
        }
    }
}

#[test]
fn test_window_size() {
    let v = [[1f32; 1]; 16];
    let windows: Vec<Vec<_>> = Windower::hanning(&v, 8, 4)
        .map(|i| i.take(8).collect::<Vec<[f32; 1]>>())
        .take(3)
        .collect();
    assert_eq!(windows.len(), 3);
}