mp4box/
boxes.rs

1use std::fmt;
2use std::str::FromStr;
3
4#[derive(Copy, Clone, Eq, PartialEq, Hash)]
5pub struct FourCC(pub [u8; 4]);
6
7impl FourCC {
8    pub fn as_str_lossy(&self) -> String {
9        self.0
10            .iter()
11            .map(|&c| {
12                if (32..=126).contains(&c) {
13                    c as char
14                } else {
15                    '.'
16                }
17            })
18            .collect()
19    }
20}
21impl fmt::Debug for FourCC {
22    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
23        write!(f, "{}", self.as_str_lossy())
24    }
25}
26impl fmt::Display for FourCC {
27    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
28        write!(f, "{}", self.as_str_lossy())
29    }
30}
31
32impl From<[u8; 4]> for FourCC {
33    fn from(b: [u8; 4]) -> Self {
34        FourCC(b)
35    }
36}
37
38impl FromStr for FourCC {
39    type Err = ();
40
41    fn from_str(s: &str) -> Result<Self, Self::Err> {
42        let b = s.as_bytes();
43        if b.len() == 4 {
44            Ok(FourCC([b[0], b[1], b[2], b[3]]))
45        } else {
46            Err(())
47        }
48    }
49}
50
51#[derive(Debug, Clone)]
52pub struct BoxHeader {
53    pub size: u64,   // total size including header, or 0=to parent end
54    pub typ: FourCC, // 4CC or b"uuid"
55    pub uuid: Option<[u8; 16]>,
56    pub header_size: u64, // 8, 16, or 24
57    pub start: u64,       // file offset of header start
58}
59
60#[derive(Debug)]
61pub enum NodeKind {
62    Container(Vec<BoxRef>),
63    FullBox {
64        version: u8,
65        flags: u32,
66        data_offset: u64,
67        data_len: u64,
68    },
69    Leaf {
70        data_offset: u64,
71        data_len: u64,
72    },
73    Unknown {
74        data_offset: u64,
75        data_len: u64,
76    },
77}
78
79#[derive(Debug)]
80pub struct BoxRef {
81    pub hdr: BoxHeader,
82    pub kind: NodeKind,
83}
84
85#[derive(Debug, Clone, PartialEq, Eq, Hash)]
86pub enum BoxKey {
87    FourCC(FourCC),
88    Uuid([u8; 16]),
89}
mp4box/boxes.rs

mp4box/
boxes.rs
