easy_ffprobe/
ratio.rs

1use core::fmt;
2use std::{fmt::Display, str::FromStr};
3
4use serde::{
5    de::{self, Visitor},
6    Deserialize, Deserializer, Serialize, Serializer,
7};
8
9#[derive(Debug, Clone, PartialEq, Eq)]
10/// Ratio eg. 1/1000
11pub struct Ratio((u64, u64));
12
13impl Ratio {
14    pub fn numerator(&self) -> u64 {
15        self.0 .0
16    }
17    pub fn denominator(&self) -> u64 {
18        self.0 .1
19    }
20}
21
22impl Display for Ratio {
23    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
24        write!(f, "{}:{}", self.0 .0, self.0 .1)
25    }
26}
27
28impl FromStr for Ratio {
29    type Err = String;
30
31    fn from_str(s: &str) -> Result<Self, Self::Err> {
32        let parts: Vec<&str> = s.split(|c| c == ':' || c == '/').collect();
33        if parts.len() != 2 {
34            return Err("Invalid ratio format".to_string());
35        }
36        let numerator = parts[0].parse::<u64>().map_err(|_| "Invalid number")?;
37        let denominator = parts[1].parse::<u64>().map_err(|_| "Invalid number")?;
38        Ok(Ratio((numerator, denominator)))
39    }
40}
41
42impl Serialize for Ratio {
43    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
44    where
45        S: Serializer,
46    {
47        serializer.serialize_str(&self.to_string())
48    }
49}
50
51impl<'de> Deserialize<'de> for Ratio {
52    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
53    where
54        D: Deserializer<'de>,
55    {
56        deserializer.deserialize_str(RatioVisitor)
57    }
58}
59
60struct RatioVisitor;
61
62impl<'de> Visitor<'de> for RatioVisitor {
63    type Value = Ratio;
64
65    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
66        formatter.write_str(
67            "a ratio in the format of 'numerator:denominator' or 'numerator/denominator'",
68        )
69    }
70
71    fn visit_str<E>(self, value: &str) -> Result<Ratio, E>
72    where
73        E: de::Error,
74    {
75        Ratio::from_str(value).map_err(de::Error::custom)
76    }
77}
easy_ffprobe/ratio.rs

easy_ffprobe/
ratio.rs
