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use byteorder::{BigEndian, ByteOrder};
use four_cc::FourCC;
use bytes::{BufMut, BytesMut};
use crate::Mp4BoxError;
use crate::{FullBoxHeader, Mp4Box};
use std::mem::size_of;
pub struct MediaHeaderBox {
pub creation_time: u64,
pub modification_time: u64,
pub timescale: u32,
pub duration: u64,
}
impl Mp4Box for MediaHeaderBox {
const NAME: FourCC = FourCC(*b"mdhd");
fn get_full_box_header(&self) -> Option<FullBoxHeader> {
Some(FullBoxHeader::new(1, 0))
}
fn content_size(&self) -> u64 {
size_of::<u64>() as u64 + // creation_time
size_of::<u64>() as u64 + // modification_time
size_of::<u32>() as u64 + // timescale
size_of::<u64>() as u64 + // duration
size_of::<u16>() as u64 + // language
size_of::<u16>() as u64 // pre_defined
}
fn write_box_contents(&self, writer: &mut BytesMut) -> Result<(), Mp4BoxError> {
let mut contents = [0u8; 32];
BigEndian::write_u64(&mut contents[..], self.creation_time);
BigEndian::write_u64(&mut contents[8..], self.modification_time);
BigEndian::write_u32(&mut contents[16..], self.timescale);
BigEndian::write_u64(&mut contents[20..], self.duration);
BigEndian::write_u16(&mut contents[28..], 0); // language
writer.put_slice(&contents);
Ok(())
}
}
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