fn read_iref()

in mp4parse/src/lib.rs [2926:2956]

• 28 lines of code
• 5 McCabe index (conditional complexity)

fn read_iref<T: Read>(src: &mut BMFFBox<T>) -> Result<TryVec<SingleItemTypeReferenceBox>> {
    let mut item_references = TryVec::new();
    let version = read_fullbox_version_no_flags(src)?;
    if version > 1 {
        return Err(Error::Unsupported("iref version"));
    }

    let mut iter = src.box_iter();
    while let Some(mut b) = iter.next_box()? {
        trace!("read_iref parsing {:?} referenceType", b.head.name);
        let from_item_id = ItemId::read(&mut b, version)?;
        let reference_count = be_u16(&mut b)?;
        item_references.reserve(reference_count.to_usize())?;
        for _ in 0..reference_count {
            let to_item_id = ItemId::read(&mut b, version)?;
            if from_item_id == to_item_id {
                return Status::IrefRecursion.into();
            }
            item_references.push(SingleItemTypeReferenceBox {
                item_type: b.head.name.into(),
                from_item_id,
                to_item_id,
            })?;
        }
        check_parser_state!(b.content);
    }

    trace!("read_iref -> {:#?}", item_references);

    Ok(item_references)
}