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https://github.com/alfg/mp4-rust.git
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3ecfd0cc9d
* Run cargo clippy --fix * Run cargo fmt --all
148 lines
3.7 KiB
Rust
148 lines
3.7 KiB
Rust
use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
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use serde::Serialize;
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use std::io::{Read, Seek, Write};
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use crate::mp4box::*;
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#[derive(Debug, Clone, PartialEq, Serialize)]
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pub struct MehdBox {
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pub version: u8,
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pub flags: u32,
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pub fragment_duration: u64,
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}
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impl MehdBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::MehdBox
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}
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pub fn get_size(&self) -> u64 {
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let mut size = HEADER_SIZE + HEADER_EXT_SIZE;
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if self.version == 1 {
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size += 8;
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} else if self.version == 0 {
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size += 4;
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}
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size
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}
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}
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impl Default for MehdBox {
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fn default() -> Self {
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MehdBox {
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version: 0,
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flags: 0,
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fragment_duration: 0,
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}
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}
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}
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impl Mp4Box for MehdBox {
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fn box_type(&self) -> BoxType {
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self.get_type()
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}
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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!("fragment_duration={}", self.fragment_duration);
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Ok(s)
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}
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}
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impl<R: Read + Seek> ReadBox<&mut R> for MehdBox {
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fn read_box(reader: &mut R, size: u64) -> Result<Self> {
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let start = box_start(reader)?;
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let (version, flags) = read_box_header_ext(reader)?;
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let fragment_duration = if version == 1 {
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reader.read_u64::<BigEndian>()?
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} else if version == 0 {
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reader.read_u32::<BigEndian>()? as u64
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} else {
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return Err(Error::InvalidData("version must be 0 or 1"));
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};
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skip_bytes_to(reader, start + size)?;
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Ok(MehdBox {
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version,
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flags,
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fragment_duration,
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})
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}
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}
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impl<W: Write> WriteBox<&mut W> for MehdBox {
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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.box_type(), size).write(writer)?;
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write_box_header_ext(writer, self.version, self.flags)?;
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if self.version == 1 {
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writer.write_u64::<BigEndian>(self.fragment_duration)?;
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} else if self.version == 0 {
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writer.write_u32::<BigEndian>(self.fragment_duration as u32)?;
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} else {
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return Err(Error::InvalidData("version must be 0 or 1"));
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}
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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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use std::io::Cursor;
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#[test]
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fn test_mehd32() {
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let src_box = MehdBox {
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version: 0,
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flags: 0,
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fragment_duration: 32,
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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 = Cursor::new(&buf);
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let header = BoxHeader::read(&mut reader).unwrap();
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assert_eq!(header.name, BoxType::MehdBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = MehdBox::read_box(&mut reader, header.size).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_mehd64() {
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let src_box = MehdBox {
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version: 0,
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flags: 0,
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fragment_duration: 30439936,
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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 = Cursor::new(&buf);
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let header = BoxHeader::read(&mut reader).unwrap();
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assert_eq!(header.name, BoxType::MehdBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = MehdBox::read_box(&mut reader, header.size).unwrap();
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assert_eq!(src_box, dst_box);
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}
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}
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