mp4_atom/meta/properties/
rref.rs

1use crate::*;
2
3// RequiredReferenceTypesProperty, ISO/IEC 23008-12 Section 6.5.17
4// Required references for a predictively encoded image item
5
6#[derive(Debug, Clone, PartialEq, Eq, Default)]
7#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
8pub struct Rref {
9    pub reference_types: Vec<FourCC>,
10}
11
12impl AtomExt for Rref {
13    type Ext = ();
14
15    const KIND_EXT: FourCC = FourCC::new(b"rref");
16
17    fn decode_body_ext<B: Buf>(buf: &mut B, _ext: ()) -> Result<Self> {
18        let reference_type_count = u8::decode(buf)?;
19        let mut reference_types = Vec::with_capacity(reference_type_count as usize);
20        for _ in 0..reference_type_count {
21            reference_types.push(FourCC::decode(buf)?);
22        }
23        Ok(Rref { reference_types })
24    }
25
26    fn encode_body_ext<B: BufMut>(&self, buf: &mut B) -> Result<()> {
27        let reference_type_count = self.reference_types.len() as u8;
28        reference_type_count.encode(buf)?;
29        for reference_type in &self.reference_types {
30            reference_type.encode(buf)?;
31        }
32        Ok(())
33    }
34}
35
36#[cfg(test)]
37mod tests {
38    use super::*;
39
40    #[test]
41    fn test_rref() {
42        let expected = Rref {
43            reference_types: vec![FourCC::new(b"dpnd"), FourCC::new(b"base")],
44        };
45        let mut buf = Vec::new();
46        expected.encode(&mut buf).unwrap();
47
48        let mut buf = buf.as_ref();
49        assert_eq!(
50            buf,
51            [
52                0, 0, 0, 0x15, b'r', b'r', b'e', b'f', 0, 0, 0, 0, 2, b'd', b'p', b'n', b'd', b'b',
53                b'a', b's', b'e'
54            ]
55        );
56        let decoded = Rref::decode(&mut buf).unwrap();
57        assert_eq!(decoded, expected);
58    }
59}
mp4_atom/meta/properties/rref.rs

mp4_atom/meta/properties/
rref.rs
