lyrics-core 0.3.0

Core types, traits, and helpers for lyrics processing
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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76

use crate::models::LineInfo;
use crate::models::SyllableInfo;

/// 为所有歌词行添加时间偏移量（单位：毫秒）。
///
/// 正值 `offset` 会将时间戳前移，负值则后移。递归处理子行。
pub fn add_offset(lines: &mut [LineInfo], offset: i32) {
    for line in lines.iter_mut() {
        add_offset_to_line(line, offset);
    }
}

fn add_offset_to_line(line: &mut LineInfo, offset: i32) {
    match line {
        LineInfo::Line {
            start_time,
            end_time,
            sub_line,
            ..
        } => {
            if let Some(st) = start_time {
                *st -= offset;
            }
            if let Some(et) = end_time {
                *et -= offset;
            }
            if let Some(sub) = sub_line {
                add_offset_to_line(sub, offset);
            }
        }
        LineInfo::Syllable {
            syllables,
            sub_line,
            ..
        } => {
            crate::models::add_offset_to_syllable_items(syllables, offset);
            if let Some(sub) = sub_line {
                add_offset_to_line(sub, offset);
            }
        }
        LineInfo::FullLine {
            start_time,
            end_time,
            sub_line,
            ..
        } => {
            if let Some(st) = start_time {
                *st -= offset;
            }
            if let Some(et) = end_time {
                *et -= offset;
            }
            if let Some(sub) = sub_line {
                add_offset_to_line(sub, offset);
            }
        }
        LineInfo::FullSyllable {
            syllables,
            sub_line,
            ..
        } => {
            crate::models::add_offset_to_syllable_items(syllables, offset);
            if let Some(sub) = sub_line {
                add_offset_to_line(sub, offset);
            }
        }
    }
}

/// 为音节列表中的每个音节添加时间偏移量（单位：毫秒）。
pub fn add_offset_to_syllables(syllables: &mut [SyllableInfo], offset: i32) {
    for syllable in syllables.iter_mut() {
        syllable.start_time -= offset;
        syllable.end_time -= offset;
    }
}