scuffle_mp4/boxes/types/
edts.rs

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use std::io;

use bytes::{Buf, Bytes};

use super::elst::Elst;
use crate::boxes::header::BoxHeader;
use crate::boxes::traits::BoxType;
use crate::boxes::DynBox;

#[derive(Debug, Clone, PartialEq)]
/// Edit Box
/// ISO/IEC 14496-12:2022(E) 8.6.5
pub struct Edts {
    pub header: BoxHeader,
    pub elst: Option<Elst>,
    pub unknown: Vec<DynBox>,
}

impl Edts {
    pub fn new(elst: Option<Elst>) -> Self {
        Self {
            header: BoxHeader::new(Self::NAME),
            elst,
            unknown: Vec::new(),
        }
    }
}

impl BoxType for Edts {
    const NAME: [u8; 4] = *b"edts";

    fn demux(header: BoxHeader, data: Bytes) -> io::Result<Self> {
        let mut reader = io::Cursor::new(data);
        let mut elst = None;
        let mut unknown = Vec::new();

        while reader.has_remaining() {
            let dyn_box = DynBox::demux(&mut reader)?;

            match dyn_box {
                DynBox::Elst(b) => {
                    elst = Some(*b);
                }
                _ => {
                    unknown.push(dyn_box);
                }
            }
        }

        Ok(Self { header, elst, unknown })
    }

    fn primitive_size(&self) -> u64 {
        self.elst.iter().map(|b| b.size()).sum::<u64>() + self.unknown.iter().map(|b| b.size()).sum::<u64>()
    }

    fn primitive_mux<T: io::Write>(&self, writer: &mut T) -> io::Result<()> {
        if let Some(elst) = &self.elst {
            elst.mux(writer)?;
        }

        for b in &self.unknown {
            b.mux(writer)?;
        }

        Ok(())
    }
}