mirror of
https://github.com/alfg/mp4-rust.git
synced 2024-06-02 21:49:24 +00:00
120 lines
3.3 KiB
Rust
120 lines
3.3 KiB
Rust
|
use std::io::{Seek, Read, Write};
|
||
|
use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
|
||
|
|
||
|
use crate::*;
|
||
|
use crate::atoms::*;
|
||
|
|
||
|
|
||
|
#[derive(Debug, Default, PartialEq)]
|
||
|
pub struct StszBox {
|
||
|
pub version: u8,
|
||
|
pub flags: u32,
|
||
|
pub sample_size: u32,
|
||
|
pub sample_sizes: Vec<u32>,
|
||
|
}
|
||
|
|
||
|
impl Mp4Box for StszBox {
|
||
|
fn box_type() -> BoxType {
|
||
|
BoxType::StszBox
|
||
|
}
|
||
|
|
||
|
fn box_size(&self) -> u64 {
|
||
|
HEADER_SIZE + HEADER_EXT_SIZE + 8 + (4 * self.sample_sizes.len() as u64)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
impl<R: Read + Seek> ReadBox<&mut R> for StszBox {
|
||
|
fn read_box(reader: &mut R, size: u64) -> Result<Self> {
|
||
|
let start = get_box_start(reader)?;
|
||
|
|
||
|
let (version, flags) = read_box_header_ext(reader)?;
|
||
|
|
||
|
let sample_size = reader.read_u32::<BigEndian>()?;
|
||
|
let sample_count = reader.read_u32::<BigEndian>()?;
|
||
|
let mut sample_sizes = Vec::with_capacity(sample_count as usize);
|
||
|
if sample_size == 0 {
|
||
|
for _i in 0..sample_count {
|
||
|
let sample_number = reader.read_u32::<BigEndian>()?;
|
||
|
sample_sizes.push(sample_number);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
skip_read_to(reader, start + size)?;
|
||
|
|
||
|
Ok(StszBox {
|
||
|
version,
|
||
|
flags,
|
||
|
sample_size,
|
||
|
sample_sizes,
|
||
|
})
|
||
|
}
|
||
|
}
|
||
|
|
||
|
impl<W: Write> WriteBox<&mut W> for StszBox {
|
||
|
fn write_box(&self, writer: &mut W) -> Result<u64> {
|
||
|
let size = self.box_size();
|
||
|
BoxHeader::new(Self::box_type(), size).write(writer)?;
|
||
|
|
||
|
write_box_header_ext(writer, self.version, self.flags)?;
|
||
|
|
||
|
writer.write_u32::<BigEndian>(self.sample_size)?;
|
||
|
writer.write_u32::<BigEndian>(self.sample_sizes.len() as u32)?;
|
||
|
if self.sample_size == 0 {
|
||
|
for sample_number in self.sample_sizes.iter() {
|
||
|
writer.write_u32::<BigEndian>(*sample_number)?;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
Ok(size)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#[cfg(test)]
|
||
|
mod tests {
|
||
|
use super::*;
|
||
|
use crate::atoms::BoxHeader;
|
||
|
use std::io::Cursor;
|
||
|
|
||
|
#[test]
|
||
|
fn test_stsz_same_size() {
|
||
|
let src_box = StszBox {
|
||
|
version: 0,
|
||
|
flags: 0,
|
||
|
sample_size: 1165,
|
||
|
sample_sizes: vec![],
|
||
|
};
|
||
|
let mut buf = Vec::new();
|
||
|
src_box.write_box(&mut buf).unwrap();
|
||
|
assert_eq!(buf.len(), src_box.box_size() as usize);
|
||
|
|
||
|
let mut reader = Cursor::new(&buf);
|
||
|
let header = BoxHeader::read(&mut reader).unwrap();
|
||
|
assert_eq!(header.name, BoxType::StszBox);
|
||
|
assert_eq!(src_box.box_size(), header.size);
|
||
|
|
||
|
let dst_box = StszBox::read_box(&mut reader, header.size).unwrap();
|
||
|
assert_eq!(src_box, dst_box);
|
||
|
}
|
||
|
|
||
|
#[test]
|
||
|
fn test_stsz_many_sizes() {
|
||
|
let src_box = StszBox {
|
||
|
version: 0,
|
||
|
flags: 0,
|
||
|
sample_size: 0,
|
||
|
sample_sizes: vec![1165, 11, 11, 8545, 10126, 10866, 9643, 9351, 7730],
|
||
|
};
|
||
|
let mut buf = Vec::new();
|
||
|
src_box.write_box(&mut buf).unwrap();
|
||
|
assert_eq!(buf.len(), src_box.box_size() as usize);
|
||
|
|
||
|
let mut reader = Cursor::new(&buf);
|
||
|
let header = BoxHeader::read(&mut reader).unwrap();
|
||
|
assert_eq!(header.name, BoxType::StszBox);
|
||
|
assert_eq!(src_box.box_size(), header.size);
|
||
|
|
||
|
let dst_box = StszBox::read_box(&mut reader, header.size).unwrap();
|
||
|
assert_eq!(src_box, dst_box);
|
||
|
}
|
||
|
}
|