mirror of
https://github.com/alfg/mp4-rust.git
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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>
136 lines
3.8 KiB
Rust
136 lines
3.8 KiB
Rust
use std::io::{BufReader, SeekFrom, Seek, Read, BufWriter, Write};
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use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
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use crate::*;
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#[derive(Debug, Default, PartialEq)]
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pub struct SttsBox {
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pub version: u8,
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pub flags: u32,
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pub entries: Vec<SttsEntry>,
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}
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#[derive(Debug, Default, PartialEq)]
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pub struct SttsEntry {
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pub sample_count: u32,
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pub sample_delta: u32,
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}
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impl Mp4Box for SttsBox {
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fn box_type(&self) -> BoxType {
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BoxType::SttsBox
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}
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fn box_size(&self) -> u64 {
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HEADER_SIZE + HEADER_EXT_SIZE + 4 + (8 * self.entries.len() as u64)
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}
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}
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impl<R: Read + Seek> ReadBox<&mut BufReader<R>> for SttsBox {
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fn read_box(reader: &mut BufReader<R>, size: u64) -> Result<Self> {
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let current = reader.seek(SeekFrom::Current(0))?; // Current cursor position.
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let (version, flags) = read_box_header_ext(reader)?;
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let entry_count = reader.read_u32::<BigEndian>()?;
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let mut entries = Vec::with_capacity(entry_count as usize);
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for _i in 0..entry_count {
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let entry = SttsEntry {
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sample_count: reader.read_u32::<BigEndian>()?,
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sample_delta: reader.read_u32::<BigEndian>()?,
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};
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entries.push(entry);
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}
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skip_read(reader, current, size)?;
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Ok(SttsBox {
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version,
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flags,
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entries,
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})
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}
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}
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impl<W: Write> WriteBox<&mut BufWriter<W>> for SttsBox {
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fn write_box(&self, writer: &mut BufWriter<W>) -> Result<u64> {
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let size = self.box_size();
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BoxHeader::new(self.box_type(), size).write_box(writer)?;
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write_box_header_ext(writer, self.version, self.flags)?;
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writer.write_u32::<BigEndian>(self.entries.len() as u32)?;
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for entry in self.entries.iter() {
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writer.write_u32::<BigEndian>(entry.sample_count)?;
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writer.write_u32::<BigEndian>(entry.sample_delta)?;
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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::read_box_header;
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use std::io::Cursor;
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#[test]
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fn test_stts32() {
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let src_box = SttsBox {
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version: 0,
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flags: 0,
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entries: vec![
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SttsEntry {sample_count: 29726, sample_delta: 1024},
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SttsEntry {sample_count: 1, sample_delta: 512},
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],
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};
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let mut buf = Vec::new();
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{
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let mut writer = BufWriter::new(&mut buf);
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src_box.write_box(&mut writer).unwrap();
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}
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assert_eq!(buf.len(), src_box.box_size() as usize);
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{
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let mut reader = BufReader::new(Cursor::new(&buf));
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let header = read_box_header(&mut reader, 0).unwrap();
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assert_eq!(header.name, BoxType::SttsBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = SttsBox::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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#[test]
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fn test_stts64() {
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let src_box = SttsBox {
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version: 1,
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flags: 0,
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entries: vec![
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SttsEntry {sample_count: 29726, sample_delta: 1024},
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SttsEntry {sample_count: 1, sample_delta: 512},
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],
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};
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let mut buf = Vec::new();
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{
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let mut writer = BufWriter::new(&mut buf);
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src_box.write_box(&mut writer).unwrap();
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}
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assert_eq!(buf.len(), src_box.box_size() as usize);
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{
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let mut reader = BufReader::new(Cursor::new(&buf));
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let header = read_box_header(&mut reader, 0).unwrap();
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assert_eq!(header.name, BoxType::SttsBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = SttsBox::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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}
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