mp4_atom/moof/traf/
tfhd.rs

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
use crate::*;

ext! {
    name: Tfhd,
    versions: [0],
    flags: {
        base_data_offset = 0,
        sample_description_index = 1,
        default_sample_duration = 3,
        default_sample_size = 4,
        default_sample_flags = 5,
        duration_is_empty = 16,
        default_base_is_moof = 17,
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Default)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Tfhd {
    pub track_id: u32,
    pub base_data_offset: Option<u64>,
    pub sample_description_index: Option<u32>,
    pub default_sample_duration: Option<u32>,
    pub default_sample_size: Option<u32>,
    pub default_sample_flags: Option<u32>,
}

impl AtomExt for Tfhd {
    const KIND_EXT: FourCC = FourCC::new(b"tfhd");

    type Ext = TfhdExt;

    fn decode_body_ext(buf: &mut Bytes, ext: TfhdExt) -> Result<Self> {
        let track_id = buf.decode()?;

        let base_data_offset = match ext.base_data_offset {
            true => u64::decode(buf)?.into(),
            false => None,
        };

        let sample_description_index = match ext.sample_description_index {
            true => u32::decode(buf)?.into(),
            false => None,
        };

        let default_sample_duration = match ext.default_sample_duration {
            true => u32::decode(buf)?.into(),
            false => None,
        };

        let default_sample_size = match ext.default_sample_size {
            true => u32::decode(buf)?.into(),
            false => None,
        };

        let default_sample_flags = match ext.default_sample_flags {
            true => u32::decode(buf)?.into(),
            false => None,
        };

        Ok(Tfhd {
            track_id,
            base_data_offset,
            sample_description_index,
            default_sample_duration,
            default_sample_size,
            default_sample_flags,
        })
    }

    fn encode_body_ext(&self, buf: &mut BytesMut) -> Result<TfhdExt> {
        let ext = TfhdExt {
            base_data_offset: self.base_data_offset.is_some(),
            sample_description_index: self.sample_description_index.is_some(),
            default_sample_duration: self.default_sample_duration.is_some(),
            default_sample_size: self.default_sample_size.is_some(),
            default_sample_flags: self.default_sample_flags.is_some(),
            ..Default::default()
        };

        self.track_id.encode(buf)?;
        self.base_data_offset.encode(buf)?;
        self.sample_description_index.encode(buf)?;
        self.default_sample_duration.encode(buf)?;
        self.default_sample_size.encode(buf)?;
        self.default_sample_flags.encode(buf)?;

        Ok(ext)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_tfhd() {
        let expected = Tfhd {
            track_id: 1,
            base_data_offset: None,
            sample_description_index: None,
            default_sample_duration: None,
            default_sample_size: None,
            default_sample_flags: None,
        };
        let mut buf = BytesMut::new();
        expected.encode(&mut buf).unwrap();

        let mut buf = buf.freeze();
        let decoded = Tfhd::decode(&mut buf).unwrap();
        assert_eq!(decoded, expected);
    }

    #[test]
    fn test_tfhd_with_flags() {
        let expected = Tfhd {
            track_id: 1,
            base_data_offset: None,
            sample_description_index: Some(1),
            default_sample_duration: Some(512),
            default_sample_size: None,
            default_sample_flags: Some(0x1010000),
        };
        let mut buf = BytesMut::new();
        expected.encode(&mut buf).unwrap();

        let mut buf = buf.freeze();
        let decoded = Tfhd::decode(&mut buf).unwrap();
        assert_eq!(decoded, expected);
    }
}