note_pen/
time.rs

1//! Time-related types for scores including relative time and speed.
2
3use crate::duration::PrimitiveDuration;
4
5#[derive(Debug, Clone, Copy)]
6#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
7#[repr(transparent)]
8pub struct Tempo {
9    pub bpm: f64,
10}
11
12impl Tempo {
13    #[inline]
14    pub const fn new(bpm: f64) -> Self {
15        Self { bpm }
16    }
17
18    #[inline]
19    pub const fn value(&self) -> f64 {
20        self.bpm
21    }
22}
23
24#[derive(Debug, Clone, Copy)]
25#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
26#[repr(transparent)]
27pub struct Measure(pub usize);
28
29impl Measure {
30    #[inline]
31    pub const fn new(measure: usize) -> Self {
32        Self(measure)
33    }
34
35    #[inline]
36    pub const fn value(&self) -> usize {
37        self.0
38    }
39}
40
41#[derive(Debug, Clone, Copy)]
42#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
43#[repr(transparent)]
44pub struct Beat(pub usize);
45
46impl Beat {
47    #[inline]
48    pub const fn new(beat: usize) -> Self {
49        Self(beat)
50    }
51
52    #[inline]
53    pub const fn value(&self) -> usize {
54        self.0
55    }
56}
57
58#[derive(Debug, Clone, Copy)]
59#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
60pub struct BeatFraction {
61    pub numerator: usize,
62    pub denominator: PrimitiveDuration,
63}
64
65impl BeatFraction {
66    #[inline]
67    pub const fn new(numerator: usize, denominator: PrimitiveDuration) -> Self {
68        Self {
69            numerator,
70            denominator,
71        }
72    }
73
74    #[inline]
75    pub fn simplify(&self) -> Self {
76        let mut numerator = self.numerator;
77        let mut denominator = self.denominator;
78        while numerator % 2 == 0 && denominator != PrimitiveDuration::WHOLE {
79            numerator /= 2;
80            denominator = denominator.double();
81        }
82        Self {
83            numerator,
84            denominator,
85        }
86    }
87}
note_pen/time.rs

note_pen/
time.rs
