fn read_ftyp()

in mp4parse/src/lib.rs [4471:4489]

• 18 lines of code
• 3 McCabe index (conditional complexity)

fn read_ftyp<T: Read>(src: &mut BMFFBox<T>) -> Result<FileTypeBox> {
    let major = be_u32(src)?;
    let minor = be_u32(src)?;
    let bytes_left = src.bytes_left();
    if bytes_left % 4 != 0 {
        return Status::FtypBadSize.into();
    }
    // Is a brand_count of zero valid?
    let brand_count = bytes_left / 4;
    let mut brands = TryVec::with_capacity(brand_count.try_into()?)?;
    for _ in 0..brand_count {
        brands.push(be_u32(src)?.into())?;
    }
    Ok(FileTypeBox {
        major_brand: From::from(major),
        minor_version: minor,
        compatible_brands: brands,
    })
}