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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 MovieHeaderBox {
pub creation_time: u64,
pub modification_time: u64,
pub timescale: u32,
pub duration: u64,
}
impl Mp4Box for MovieHeaderBox {
const NAME: FourCC = FourCC(*b"mvhd");
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::<u32>() as u64 + // rate
size_of::<u16>() as u64 + // volume
size_of::<u16>() as u64 + // reserved
size_of::<u32>() as u64 * 2 + // reserved
size_of::<i32>() as u64 * 9 + // matrix
size_of::<u32>() as u64 * 6 + // pre_defined
size_of::<u32>() as u64 // next_track_ID
}
fn write_box_contents(&self, writer: &mut BytesMut) -> Result<(), Mp4BoxError> {
let mut contents = [0u8; 108];
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_i32(&mut contents[28..], 0x00010000);
BigEndian::write_i16(&mut contents[32..], 0x0100);
BigEndian::write_u16(&mut contents[34..], 0);
BigEndian::write_u64(&mut contents[36..], 0);
BigEndian::write_i32(&mut contents[44..], 0x00010000);
BigEndian::write_i32(&mut contents[60..], 0x00010000);
BigEndian::write_i32(&mut contents[76..], 0x40000000);
BigEndian::write_u32(&mut contents[104..], 1);
writer.put_slice(&contents);
Ok(())
}
}
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