mp4_atom/meta/
pitm.rs

1use crate::*;
2
3// PrimaryItemBox, ISO/IEC 14496-12 Section 8.11.4
4// This is used in HEIF to indicate which photo to show
5
6ext! {
7    name: Pitm,
8    versions: [0, 1],
9    flags: {}
10}
11
12#[derive(Debug, Clone, PartialEq, Eq, Default)]
13#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
14pub struct Pitm {
15    pub item_id: u32,
16}
17
18impl AtomExt for Pitm {
19    type Ext = PitmExt;
20
21    const KIND_EXT: FourCC = FourCC::new(b"pitm");
22
23    fn decode_body_ext<B: Buf>(buf: &mut B, ext: PitmExt) -> Result<Self> {
24        if ext.version == PitmVersion::V0 {
25            Ok(Pitm {
26                item_id: u16::decode(buf)?.into(),
27            })
28        } else {
29            Ok(Pitm {
30                item_id: u32::decode(buf)?,
31            })
32        }
33    }
34
35    fn encode_body_ext<B: BufMut>(&self, buf: &mut B) -> Result<PitmExt> {
36        if self.item_id <= u16::MAX.into() {
37            let id = self.item_id as u16;
38            id.encode(buf)?;
39            Ok(PitmExt {
40                version: PitmVersion::V0,
41            })
42        } else {
43            self.item_id.encode(buf)?;
44            Ok(PitmExt {
45                version: PitmVersion::V1,
46            })
47        }
48    }
49}
mp4_atom/meta/pitm.rs

mp4_atom/meta/
pitm.rs
