mirror of
https://github.com/alfg/mp4-rust.git
synced 2024-05-20 09:18:16 +00:00
4df9fa1bd4
* Add ReadBox trait * Add boxtype macro * Remove offset in BoxHeader * Fix parsing error when box has largesize * Remove duplicated codes reading version and flags * Add test code for all leaves in box tree * Remove entry_count that is duplacated with entries.len() * Change volume type to Ratio<u16> Co-authored-by: Byungwan Jun <unipro.kr@gmail.com>
114 lines
3.1 KiB
Rust
114 lines
3.1 KiB
Rust
use std::io::{BufReader, SeekFrom, Seek, Read, BufWriter, Write};
|
|
use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
|
|
|
|
use crate::*;
|
|
|
|
|
|
#[derive(Debug, Default, PartialEq)]
|
|
pub struct HdlrBox {
|
|
pub version: u8,
|
|
pub flags: u32,
|
|
pub handler_type: FourCC,
|
|
pub name: String,
|
|
}
|
|
|
|
impl Mp4Box for HdlrBox {
|
|
fn box_type(&self) -> BoxType {
|
|
BoxType::HdlrBox
|
|
}
|
|
|
|
fn box_size(&self) -> u64 {
|
|
HEADER_SIZE + HEADER_EXT_SIZE + 20 + self.name.len() as u64 + 1
|
|
}
|
|
}
|
|
|
|
impl<R: Read + Seek> ReadBox<&mut BufReader<R>> for HdlrBox {
|
|
fn read_box(reader: &mut BufReader<R>, size: u64) -> Result<Self> {
|
|
let current = reader.seek(SeekFrom::Current(0))?; // Current cursor position.
|
|
|
|
let (version, flags) = read_box_header_ext(reader)?;
|
|
|
|
reader.read_u32::<BigEndian>()?; // pre-defined
|
|
let handler = reader.read_u32::<BigEndian>()?;
|
|
|
|
let n = reader.seek(SeekFrom::Current(12))?; // 12 bytes reserved.
|
|
|
|
let buf_size = (size - (n - current)) - HEADER_SIZE - 1;
|
|
let mut buf = vec![0u8; buf_size as usize];
|
|
reader.read_exact(&mut buf)?;
|
|
|
|
let handler_string = match String::from_utf8(buf) {
|
|
Ok(t) => {
|
|
assert_eq!(t.len(), buf_size as usize);
|
|
t
|
|
},
|
|
_ => String::from("null"),
|
|
};
|
|
|
|
skip_read(reader, current, size)?;
|
|
|
|
Ok(HdlrBox {
|
|
version,
|
|
flags,
|
|
handler_type: From::from(handler),
|
|
name: handler_string,
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<W: Write> WriteBox<&mut BufWriter<W>> for HdlrBox {
|
|
fn write_box(&self, writer: &mut BufWriter<W>) -> Result<u64> {
|
|
let size = self.box_size();
|
|
BoxHeader::new(self.box_type(), size).write_box(writer)?;
|
|
|
|
write_box_header_ext(writer, self.version, self.flags)?;
|
|
|
|
writer.write_u32::<BigEndian>(0)?; // pre-defined
|
|
writer.write_u32::<BigEndian>((&self.handler_type).into())?;
|
|
|
|
// 12 bytes reserved
|
|
for _ in 0..3 {
|
|
writer.write_u32::<BigEndian>(0)?;
|
|
}
|
|
|
|
writer.write(self.name.as_bytes())?;
|
|
writer.write_u8(0)?;
|
|
|
|
Ok(size)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::read_box_header;
|
|
use std::io::Cursor;
|
|
|
|
#[test]
|
|
fn test_hdlr() {
|
|
let src_box = HdlrBox {
|
|
version: 0,
|
|
flags: 0,
|
|
handler_type: FourCC::from("vide"),
|
|
name: String::from("VideoHandler"),
|
|
};
|
|
let mut buf = Vec::new();
|
|
{
|
|
let mut writer = BufWriter::new(&mut buf);
|
|
src_box.write_box(&mut writer).unwrap();
|
|
}
|
|
assert_eq!(buf.len(), src_box.box_size() as usize);
|
|
|
|
{
|
|
let mut reader = BufReader::new(Cursor::new(&buf));
|
|
let header = read_box_header(&mut reader, 0).unwrap();
|
|
assert_eq!(header.name, BoxType::HdlrBox);
|
|
assert_eq!(src_box.box_size(), header.size);
|
|
|
|
let dst_box = HdlrBox::read_box(&mut reader, header.size).unwrap();
|
|
|
|
assert_eq!(src_box, dst_box);
|
|
}
|
|
}
|
|
}
|