mirror of
https://github.com/alfg/mp4-rust.git
synced 2024-05-20 01:08:06 +00:00
161 lines
4.3 KiB
Rust
161 lines
4.3 KiB
Rust
use byteorder::{BigEndian, WriteBytesExt};
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use serde::Serialize;
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use std::io::Write;
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use crate::mp4box::*;
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#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize)]
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pub struct HdlrBox {
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pub version: u8,
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pub flags: u32,
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pub handler_type: FourCC,
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pub name: String,
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}
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impl HdlrBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::HdlrBox
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}
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pub fn get_size(&self) -> u64 {
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HEADER_SIZE + HEADER_EXT_SIZE + 20 + self.name.len() as u64 + 1
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}
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}
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impl Mp4Box for HdlrBox {
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const TYPE: BoxType = BoxType::HdlrBox;
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fn box_size(&self) -> u64 {
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self.get_size()
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}
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fn to_json(&self) -> Result<String> {
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Ok(serde_json::to_string(&self).unwrap())
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}
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fn summary(&self) -> Result<String> {
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let s = format!("handler_type={} name={}", self.handler_type, self.name);
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Ok(s)
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}
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}
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impl BlockReader for HdlrBox {
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fn read_block<'a>(reader: &mut impl Reader<'a>) -> Result<Self> {
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let (version, flags) = read_box_header_ext(reader);
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reader.get_u32(); // pre-defined
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let handler = reader.get_u32();
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reader.skip(12);
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Ok(HdlrBox {
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version,
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flags,
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handler_type: From::from(handler),
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name: reader.get_null_terminated_string(),
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})
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}
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fn size_hint() -> usize {
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24
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}
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}
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impl<W: Write> WriteBox<&mut W> for HdlrBox {
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fn write_box(&self, writer: &mut W) -> Result<u64> {
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let size = self.box_size();
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BoxHeader::new(Self::TYPE, size).write(writer)?;
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write_box_header_ext(writer, self.version, self.flags)?;
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writer.write_u32::<BigEndian>(0)?; // pre-defined
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writer.write_u32::<BigEndian>((&self.handler_type).into())?;
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// 12 bytes reserved
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for _ in 0..3 {
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writer.write_u32::<BigEndian>(0)?;
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}
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writer.write_all(self.name.as_bytes())?;
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writer.write_u8(0)?;
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Ok(size)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::mp4box::BoxHeader;
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#[test]
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fn test_hdlr() {
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let src_box = HdlrBox {
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version: 0,
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flags: 0,
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handler_type: str::parse::<FourCC>("vide").unwrap(),
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name: String::from("VideoHandler"),
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};
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let mut buf = Vec::new();
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src_box.write_box(&mut buf).unwrap();
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assert_eq!(buf.len(), src_box.box_size() as usize);
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let mut reader = buf.as_slice();
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let header = BoxHeader::read_sync(&mut reader).unwrap().unwrap();
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assert_eq!(header.kind, BoxType::HdlrBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = HdlrBox::read_block(&mut reader).unwrap();
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assert_eq!(src_box, dst_box);
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}
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#[test]
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fn test_hdlr_empty() {
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let src_box = HdlrBox {
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version: 0,
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flags: 0,
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handler_type: str::parse::<FourCC>("vide").unwrap(),
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name: String::new(),
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};
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let mut buf = Vec::new();
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src_box.write_box(&mut buf).unwrap();
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assert_eq!(buf.len(), src_box.box_size() as usize);
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let mut reader = buf.as_slice();
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let header = BoxHeader::read_sync(&mut reader).unwrap().unwrap();
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assert_eq!(header.kind, BoxType::HdlrBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = HdlrBox::read_block(&mut reader).unwrap();
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assert_eq!(src_box, dst_box);
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}
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#[test]
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fn test_hdlr_extra() {
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let real_src_box = HdlrBox {
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version: 0,
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flags: 0,
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handler_type: str::parse::<FourCC>("vide").unwrap(),
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name: String::from("Good"),
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};
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let src_box = HdlrBox {
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version: 0,
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flags: 0,
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handler_type: str::parse::<FourCC>("vide").unwrap(),
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name: String::from_utf8(b"Good\0Bad".to_vec()).unwrap(),
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};
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let mut buf = Vec::new();
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src_box.write_box(&mut buf).unwrap();
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assert_eq!(buf.len(), src_box.box_size() as usize);
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let mut reader = buf.as_slice();
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let header = BoxHeader::read_sync(&mut reader).unwrap().unwrap();
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assert_eq!(header.kind, BoxType::HdlrBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = HdlrBox::read_block(&mut reader).unwrap();
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assert_eq!(real_src_box, dst_box);
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}
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}
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