mirror of
https://github.com/alfg/mp4-rust.git
synced 2024-05-19 16:58:04 +00:00
230 lines
6.2 KiB
Rust
230 lines
6.2 KiB
Rust
use std::io::{Read, Seek};
|
|
|
|
use serde::Serialize;
|
|
|
|
use crate::mp4box::hdlr::HdlrBox;
|
|
use crate::mp4box::ilst::IlstBox;
|
|
use crate::mp4box::*;
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
|
|
#[serde(tag = "hdlr")]
|
|
#[serde(rename_all = "lowercase")]
|
|
pub enum MetaBox {
|
|
Mdir {
|
|
#[serde(skip_serializing_if = "Option::is_none")]
|
|
ilst: Option<IlstBox>,
|
|
},
|
|
|
|
#[serde(skip)]
|
|
Unknown {
|
|
#[serde(skip)]
|
|
hdlr: HdlrBox,
|
|
|
|
#[serde(skip)]
|
|
data: Vec<u8>,
|
|
},
|
|
}
|
|
|
|
const MDIR: FourCC = FourCC { value: *b"mdir" };
|
|
|
|
impl MetaBox {
|
|
pub fn get_type(&self) -> BoxType {
|
|
BoxType::MetaBox
|
|
}
|
|
|
|
pub fn get_size(&self) -> u64 {
|
|
let mut size = HEADER_SIZE + HEADER_EXT_SIZE;
|
|
match self {
|
|
Self::Mdir { ilst } => {
|
|
size += HdlrBox::default().box_size();
|
|
if let Some(ilst) = ilst {
|
|
size += ilst.box_size();
|
|
}
|
|
}
|
|
Self::Unknown { hdlr, data } => size += hdlr.box_size() + data.len() as u64,
|
|
}
|
|
size
|
|
}
|
|
}
|
|
|
|
impl Mp4Box for MetaBox {
|
|
fn box_type(&self) -> BoxType {
|
|
self.get_type()
|
|
}
|
|
|
|
fn box_size(&self) -> u64 {
|
|
self.get_size()
|
|
}
|
|
|
|
fn to_json(&self) -> Result<String> {
|
|
Ok(serde_json::to_string(&self).unwrap())
|
|
}
|
|
|
|
fn summary(&self) -> Result<String> {
|
|
let s = match self {
|
|
Self::Mdir { .. } => "hdlr=ilst".to_string(),
|
|
Self::Unknown { hdlr, data } => {
|
|
format!("hdlr={} data_len={}", hdlr.handler_type, data.len())
|
|
}
|
|
};
|
|
Ok(s)
|
|
}
|
|
}
|
|
|
|
impl Default for MetaBox {
|
|
fn default() -> Self {
|
|
Self::Unknown {
|
|
hdlr: Default::default(),
|
|
data: Default::default(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<R: Read + Seek> ReadBox<&mut R> for MetaBox {
|
|
fn read_box(reader: &mut R, size: u64) -> Result<Self> {
|
|
let start = box_start(reader)?;
|
|
|
|
let (version, _) = read_box_header_ext(reader)?;
|
|
if version != 0 {
|
|
return Err(Error::UnsupportedBoxVersion(BoxType::UdtaBox, version));
|
|
}
|
|
|
|
let hdlr_header = BoxHeader::read(reader)?;
|
|
if hdlr_header.name != BoxType::HdlrBox {
|
|
return Err(Error::BoxNotFound(BoxType::HdlrBox));
|
|
}
|
|
let hdlr = HdlrBox::read_box(reader, hdlr_header.size)?;
|
|
|
|
let mut ilst = None;
|
|
|
|
let mut current = reader.stream_position()?;
|
|
let end = start + size;
|
|
|
|
match hdlr.handler_type {
|
|
MDIR => {
|
|
while current < end {
|
|
// Get box header.
|
|
let header = BoxHeader::read(reader)?;
|
|
let BoxHeader { name, size: s } = header;
|
|
|
|
match name {
|
|
BoxType::IlstBox => {
|
|
ilst = Some(IlstBox::read_box(reader, s)?);
|
|
}
|
|
_ => {
|
|
// XXX warn!()
|
|
skip_box(reader, s)?;
|
|
}
|
|
}
|
|
|
|
current = reader.stream_position()?;
|
|
}
|
|
|
|
Ok(MetaBox::Mdir { ilst })
|
|
}
|
|
_ => {
|
|
let mut data = vec![0u8; (end - current) as usize];
|
|
reader.read_exact(&mut data)?;
|
|
|
|
Ok(MetaBox::Unknown { hdlr, data })
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<W: Write> WriteBox<&mut W> for MetaBox {
|
|
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, 0, 0)?;
|
|
|
|
let hdlr = match self {
|
|
Self::Mdir { .. } => HdlrBox {
|
|
handler_type: MDIR,
|
|
..Default::default()
|
|
},
|
|
Self::Unknown { hdlr, .. } => hdlr.clone(),
|
|
};
|
|
hdlr.write_box(writer)?;
|
|
|
|
match self {
|
|
Self::Mdir { ilst } => {
|
|
if let Some(ilst) = ilst {
|
|
ilst.write_box(writer)?;
|
|
}
|
|
}
|
|
Self::Unknown { data, .. } => writer.write_all(data)?,
|
|
}
|
|
Ok(size)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::mp4box::BoxHeader;
|
|
use std::io::Cursor;
|
|
|
|
#[test]
|
|
fn test_meta_mdir_empty() {
|
|
let src_box = MetaBox::Mdir { ilst: None };
|
|
|
|
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::MetaBox);
|
|
assert_eq!(header.size, src_box.box_size());
|
|
|
|
let dst_box = MetaBox::read_box(&mut reader, header.size).unwrap();
|
|
assert_eq!(dst_box, src_box);
|
|
}
|
|
|
|
#[test]
|
|
fn test_meta_mdir() {
|
|
let src_box = MetaBox::Mdir {
|
|
ilst: Some(IlstBox::default()),
|
|
};
|
|
|
|
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::MetaBox);
|
|
assert_eq!(header.size, src_box.box_size());
|
|
|
|
let dst_box = MetaBox::read_box(&mut reader, header.size).unwrap();
|
|
assert_eq!(dst_box, src_box);
|
|
}
|
|
|
|
#[test]
|
|
fn test_meta_unknown() {
|
|
let src_hdlr = HdlrBox {
|
|
handler_type: FourCC::from(*b"test"),
|
|
..Default::default()
|
|
};
|
|
let src_data = b"123";
|
|
let src_box = MetaBox::Unknown {
|
|
hdlr: src_hdlr,
|
|
data: src_data.to_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::MetaBox);
|
|
assert_eq!(header.size, src_box.box_size());
|
|
|
|
let dst_box = MetaBox::read_box(&mut reader, header.size).unwrap();
|
|
assert_eq!(dst_box, src_box);
|
|
}
|
|
}
|