async-mp4 0.1.1

Async Mp4 Muxer and Demuxer in pure rust
Documentation 
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use futures::AsyncReadExt;
use crate::bytes_read::ReadMp4;
use crate::bytes_write::{Mp4Writable, WriteMp4};
use crate::error::MP4Error;
use crate::header::BoxHeader;
use crate::id::BoxId;
use crate::mp4box::box_trait::{BoxRead, BoxWrite, IBox};
use crate::r#type::BoxType;
use crate::size::BoxSize;
use async_trait::async_trait;

#[derive(Debug, Clone, Eq, PartialEq, Hash)]
pub struct MdatBox(pub Vec<u8>);

impl MdatBox {

    fn inner_byte_size(&self) -> usize {
        self.0.byte_size()
    }

    pub fn header(&self) -> BoxHeader {
        BoxHeader::from_id_and_inner_size(Self::ID, self.inner_byte_size())
    }

}

impl IBox for MdatBox {
    fn byte_size(&self) -> usize {
        self.header().byte_size() + self.inner_byte_size()
    }

    const ID: BoxType = BoxType::Id(BoxId(*b"mdat"));
}

#[async_trait]
impl BoxRead for MdatBox {
    async fn read<R: ReadMp4>(header: BoxHeader, reader: &mut R) -> Result<Self, MP4Error> {
        let data = match header.size_minus_self() {
            BoxSize::Known(size) => {
                let mut vec = vec![0u8; size];
                reader.read_exact(vec.as_mut_slice()).await?;
                vec
            }
            BoxSize::Unknown => {
                let mut vec = vec![];
                reader.read_to_end(&mut vec).await?;
                vec
            }
        };
        Ok(Self(data))
    }
}


impl BoxWrite for MdatBox {
    fn write<W: WriteMp4>(&self, writer: &mut W) -> Result<usize, MP4Error> {
        let mut count = 0;
        count += self.header().write(writer)?;
        count += writer.write(&self.0)?;
        Ok(count)
    }
}