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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2026 metamuffin <metamuffin.org>
*/
mod boxes;
pub use boxes::*;
pub struct BoxW<'a>(&'a mut Vec<u8>);
impl<'a> BoxW<'a> {
pub fn new(buffer: &'a mut Vec<u8>) -> Self {
Self(buffer)
}
pub fn buffer_mut(&mut self) -> &mut Vec<u8> {
self.0
}
pub fn write<T: WriteBox>(&mut self, b: T) {
let start = self.0.len();
self.0.extend(0u32.to_be_bytes());
self.0.extend(T::BOXTYPE);
if let Some(ver) = T::VERSION {
self.0.push(ver);
self.0.extend(&b.flags().to_be_bytes()[1..]);
}
b.write(self.0);
let size = (self.0.len() - start) as u32;
self.0[start..start + 4].copy_from_slice(&size.to_be_bytes());
}
}
pub trait WriteBox {
const BOXTYPE: [u8; 4];
const VERSION: Option<u8> = None;
fn write(&self, buf: &mut Vec<u8>);
fn flags(&self) -> u32 {
0
}
}
impl<T: WriteBox> WriteBox for &T {
const BOXTYPE: [u8; 4] = T::BOXTYPE;
const VERSION: Option<u8> = T::VERSION;
fn write(&self, buf: &mut Vec<u8>) {
(**self).write(buf);
}
fn flags(&self) -> u32 {
(**self).flags()
}
}
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