mp4 0.14.0

MP4 reader and writer library in Rust.
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
use serde::Serialize;
use std::io::{Read, Seek, Write};

use crate::mp4box::vp09::Vp09Box;
use crate::mp4box::*;
use crate::mp4box::{avc1::Avc1Box, hev1::Hev1Box, mp4a::Mp4aBox, tx3g::Tx3gBox};

#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
pub struct StsdBox {
    pub version: u8,
    pub flags: u32,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub avc1: Option<Avc1Box>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub hev1: Option<Hev1Box>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub vp09: Option<Vp09Box>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub mp4a: Option<Mp4aBox>,

    #[serde(skip_serializing_if = "Option::is_none")]
    pub tx3g: Option<Tx3gBox>,
}

impl StsdBox {
    pub fn get_type(&self) -> BoxType {
        BoxType::StsdBox
    }

    pub fn get_size(&self) -> u64 {
        let mut size = HEADER_SIZE + HEADER_EXT_SIZE + 4;
        if let Some(ref avc1) = self.avc1 {
            size += avc1.box_size();
        } else if let Some(ref hev1) = self.hev1 {
            size += hev1.box_size();
        } else if let Some(ref vp09) = self.vp09 {
            size += vp09.box_size();
        } else if let Some(ref mp4a) = self.mp4a {
            size += mp4a.box_size();
        } else if let Some(ref tx3g) = self.tx3g {
            size += tx3g.box_size();
        }
        size
    }
}

impl Mp4Box for StsdBox {
    fn box_type(&self) -> BoxType {
        self.get_type()
    }

    fn box_size(&self) -> u64 {
        self.get_size()
    }

    fn to_json(&self) -> Result<String> {
        Ok(serde_json::to_string(&self).unwrap())
    }

    fn summary(&self) -> Result<String> {
        let s = String::new();
        Ok(s)
    }
}

impl<R: Read + Seek> ReadBox<&mut R> for StsdBox {
    fn read_box(reader: &mut R, size: u64) -> Result<Self> {
        let start = box_start(reader)?;

        let (version, flags) = read_box_header_ext(reader)?;

        reader.read_u32::<BigEndian>()?; // XXX entry_count

        let mut avc1 = None;
        let mut hev1 = None;
        let mut vp09 = None;
        let mut mp4a = None;
        let mut tx3g = None;

        // Get box header.
        let header = BoxHeader::read(reader)?;
        let BoxHeader { name, size: s } = header;
        if s > size {
            return Err(Error::InvalidData(
                "stsd box contains a box with a larger size than it",
            ));
        }

        match name {
            BoxType::Avc1Box => {
                avc1 = Some(Avc1Box::read_box(reader, s)?);
            }
            BoxType::Hev1Box => {
                hev1 = Some(Hev1Box::read_box(reader, s)?);
            }
            BoxType::Vp09Box => {
                vp09 = Some(Vp09Box::read_box(reader, s)?);
            }
            BoxType::Mp4aBox => {
                mp4a = Some(Mp4aBox::read_box(reader, s)?);
            }
            BoxType::Tx3gBox => {
                tx3g = Some(Tx3gBox::read_box(reader, s)?);
            }
            _ => {}
        }

        skip_bytes_to(reader, start + size)?;

        Ok(StsdBox {
            version,
            flags,
            avc1,
            hev1,
            vp09,
            mp4a,
            tx3g,
        })
    }
}

impl<W: Write> WriteBox<&mut W> for StsdBox {
    fn write_box(&self, writer: &mut W) -> Result<u64> {
        let size = self.box_size();
        BoxHeader::new(self.box_type(), size).write(writer)?;

        write_box_header_ext(writer, self.version, self.flags)?;

        writer.write_u32::<BigEndian>(1)?; // entry_count

        if let Some(ref avc1) = self.avc1 {
            avc1.write_box(writer)?;
        } else if let Some(ref hev1) = self.hev1 {
            hev1.write_box(writer)?;
        } else if let Some(ref vp09) = self.vp09 {
            vp09.write_box(writer)?;
        } else if let Some(ref mp4a) = self.mp4a {
            mp4a.write_box(writer)?;
        } else if let Some(ref tx3g) = self.tx3g {
            tx3g.write_box(writer)?;
        }

        Ok(size)
    }
}