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TKHD box parsing.

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Alf 2020-01-16 22:43:41 -08:00
parent 4acb2cd93f
commit b400b02aee
1 changed files with 50 additions and 1 deletions
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51
src/lib.rs
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@ -5,7 +5,7 @@ use std::io::{BufReader, Read, SeekFrom};
use std::fs::File;
use std::fmt;
use std::convert::TryInto;
use byteorder::{ReadBytesExt};
use byteorder::{ReadBytesExt, BigEndian};
const HEADER_SIZE: u32 = 8;
@ -93,8 +93,29 @@ struct TkhdBox {
creation_time: u32,
modification_time: u32,
track_id: u32,
duration: u64,
layer: u16,
alternate_group: u16,
volume: u16,
matrix: Matrix,
width: u32,
height: u32,
}
#[derive(Debug, Default)]
struct Matrix {
a: i32,
b: i32,
u: i32,
c: i32,
d: i32,
v: i32,
x: i32,
y: i32,
w: i32,
}
#[derive(Default, PartialEq, Clone)]
pub struct FourCC {
pub value: String
@ -355,6 +376,27 @@ fn parse_tkhd_box(f: &mut BufReader<File>, _offset: u64, size: u32) -> Result<Tk
let creation_time = f.read_u32::<byteorder::BigEndian>().unwrap();
let modification_time = f.read_u32::<byteorder::BigEndian>().unwrap();
let track_id = f.read_u32::<byteorder::BigEndian>().unwrap();
let duration = f.read_u64::<byteorder::BigEndian>().unwrap();
f.read_u64::<byteorder::BigEndian>().unwrap(); // skip.
let layer = f.read_u16::<byteorder::BigEndian>().unwrap();
let alternate_group = f.read_u16::<byteorder::BigEndian>().unwrap();
let volume = f.read_u16::<byteorder::BigEndian>().unwrap() >> 8;
f.read_u8().unwrap(); // skip.
let matrix = Matrix{
a: f.read_i32::<byteorder::LittleEndian>().unwrap(),
b: f.read_i32::<byteorder::BigEndian>().unwrap(),
u: f.read_i32::<byteorder::BigEndian>().unwrap(),
c: f.read_i32::<byteorder::BigEndian>().unwrap(),
d: f.read_i32::<byteorder::BigEndian>().unwrap(),
v: f.read_i32::<byteorder::BigEndian>().unwrap(),
x: f.read_i32::<byteorder::BigEndian>().unwrap(),
y: f.read_i32::<byteorder::BigEndian>().unwrap(),
w: f.read_i32::<byteorder::BigEndian>().unwrap(),
};
let width = f.read_u32::<byteorder::BigEndian>().unwrap() >> 8;
let height = f.read_u32::<byteorder::BigEndian>().unwrap() >> 8;
// Skip remaining bytes.
let after = f.seek(SeekFrom::Current(0)).unwrap();
@ -367,5 +409,12 @@ fn parse_tkhd_box(f: &mut BufReader<File>, _offset: u64, size: u32) -> Result<Tk
creation_time,
modification_time,
track_id,
duration,
layer,
alternate_group,
volume,
matrix,
width,
height,
})
}