mp4_atom/meta/properties/
ispe.rs

1use crate::*;
2
3// ImageSpatialExtentProperty, ISO/IEC 23008-12 Section 6.5.3
4// Height and width of the image.
5
6#[derive(Debug, Clone, PartialEq, Eq, Default)]
7#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
8pub struct Ispe {
9    pub width: u32,
10    pub height: u32,
11}
12
13impl AtomExt for Ispe {
14    type Ext = ();
15
16    const KIND_EXT: FourCC = FourCC::new(b"ispe");
17
18    fn decode_body_ext<B: Buf>(buf: &mut B, _ext: ()) -> Result<Self> {
19        let width = u32::decode(buf)?;
20        let height = u32::decode(buf)?;
21        Ok(Ispe { width, height })
22    }
23
24    fn encode_body_ext<B: BufMut>(&self, buf: &mut B) -> Result<()> {
25        self.width.encode(buf)?;
26        self.height.encode(buf)?;
27        Ok(())
28    }
29}
30
31#[cfg(test)]
32mod tests {
33    use super::*;
34
35    #[test]
36    fn test_ispe() {
37        let expected = Ispe {
38            width: 1024,
39            height: 768,
40        };
41        let mut buf = Vec::new();
42        expected.encode(&mut buf).unwrap();
43
44        let mut buf = buf.as_ref();
45        assert_eq!(
46            buf,
47            [0, 0, 0, 20, b'i', b's', b'p', b'e', 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 3, 0]
48        );
49        let decoded = Ispe::decode(&mut buf).unwrap();
50        assert_eq!(decoded, expected);
51    }
52}
mp4_atom/meta/properties/ispe.rs

mp4_atom/meta/properties/
ispe.rs
