flowly_mp4/mp4box/
trex.rs

1use byteorder::{BigEndian, WriteBytesExt};
2use serde::Serialize;
3use std::io::Write;
4
5use crate::mp4box::*;
6
7#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
8pub struct TrexBox {
9    pub version: u8,
10    pub flags: u32,
11    pub track_id: u32,
12    pub default_sample_description_index: u32,
13    pub default_sample_duration: u32,
14    pub default_sample_size: u32,
15    pub default_sample_flags: u32,
16}
17
18impl TrexBox {
19    pub fn get_type(&self) -> BoxType {
20        BoxType::TrexBox
21    }
22
23    pub fn get_size(&self) -> u64 {
24        HEADER_SIZE + HEADER_EXT_SIZE + 20
25    }
26}
27
28impl Mp4Box for TrexBox {
29    const TYPE: BoxType = BoxType::TrexBox;
30
31    fn box_size(&self) -> u64 {
32        self.get_size()
33    }
34
35    fn to_json(&self) -> Result<String, Error> {
36        Ok(serde_json::to_string(&self).unwrap())
37    }
38
39    fn summary(&self) -> Result<String, Error> {
40        let s = format!(
41            "track_id={} default_sample_duration={}",
42            self.track_id, self.default_sample_duration
43        );
44        Ok(s)
45    }
46}
47
48impl BlockReader for TrexBox {
49    fn read_block<'a>(reader: &mut impl Reader<'a>) -> Result<Self, Error> {
50        let (version, flags) = read_box_header_ext(reader);
51
52        let track_id = reader.get_u32();
53        let default_sample_description_index = reader.get_u32();
54        let default_sample_duration = reader.get_u32();
55        let default_sample_size = reader.get_u32();
56        let default_sample_flags = reader.get_u32();
57
58        Ok(TrexBox {
59            version,
60            flags,
61            track_id,
62            default_sample_description_index,
63            default_sample_duration,
64            default_sample_size,
65            default_sample_flags,
66        })
67    }
68
69    fn size_hint() -> usize {
70        24
71    }
72}
73
74impl<W: Write> WriteBox<&mut W> for TrexBox {
75    fn write_box(&self, writer: &mut W) -> Result<u64, Error> {
76        let size = self.box_size();
77        BoxHeader::new(Self::TYPE, size).write(writer)?;
78
79        write_box_header_ext(writer, self.version, self.flags)?;
80
81        writer.write_u32::<BigEndian>(self.track_id)?;
82        writer.write_u32::<BigEndian>(self.default_sample_description_index)?;
83        writer.write_u32::<BigEndian>(self.default_sample_duration)?;
84        writer.write_u32::<BigEndian>(self.default_sample_size)?;
85        writer.write_u32::<BigEndian>(self.default_sample_flags)?;
86
87        Ok(size)
88    }
89}
90
91#[cfg(test)]
92mod tests {
93    use super::*;
94    use crate::mp4box::BoxHeader;
95
96    #[tokio::test]
97    async fn test_trex() {
98        let src_box = TrexBox {
99            version: 0,
100            flags: 0,
101            track_id: 1,
102            default_sample_description_index: 1,
103            default_sample_duration: 1000,
104            default_sample_size: 0,
105            default_sample_flags: 65536,
106        };
107        let mut buf = Vec::new();
108        src_box.write_box(&mut buf).unwrap();
109        assert_eq!(buf.len(), src_box.box_size() as usize);
110
111        let mut reader = buf.as_slice();
112        let header = BoxHeader::read(&mut reader, &mut 0).await.unwrap().unwrap();
113        assert_eq!(header.kind, BoxType::TrexBox);
114        assert_eq!(src_box.box_size(), header.size);
115
116        let dst_box = TrexBox::read_block(&mut reader).unwrap();
117        assert_eq!(src_box, dst_box);
118    }
119}
flowly_mp4/mp4box/trex.rs

flowly_mp4/mp4box/
trex.rs
