mirror of
https://github.com/alfg/mp4-rust.git
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92 lines
2.2 KiB
Rust
92 lines
2.2 KiB
Rust
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use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
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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)]
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pub struct Tx3gBox {
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pub data_reference_index: u16,
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}
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impl Default for Tx3gBox {
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fn default() -> Self {
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Tx3gBox {
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data_reference_index: 0,
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}
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}
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}
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impl Tx3gBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::Tx3gBox
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}
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pub fn get_size(&self) -> u64 {
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HEADER_SIZE + 8
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}
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}
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impl Mp4Box for Tx3gBox {
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fn box_type(&self) -> BoxType {
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return self.get_type();
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}
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fn box_size(&self) -> u64 {
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return self.get_size();
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}
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}
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impl<R: Read + Seek> ReadBox<&mut R> for Tx3gBox {
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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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reader.read_u32::<BigEndian>()?; // reserved
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reader.read_u16::<BigEndian>()?; // reserved
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let data_reference_index = reader.read_u16::<BigEndian>()?;
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skip_bytes_to(reader, start + size)?;
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Ok(Tx3gBox {
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data_reference_index,
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})
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}
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}
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impl<W: Write> WriteBox<&mut W> for Tx3gBox {
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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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writer.write_u32::<BigEndian>(0)?; // reserved
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writer.write_u16::<BigEndian>(0)?; // reserved
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writer.write_u16::<BigEndian>(self.data_reference_index)?;
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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_tx3g() {
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let src_box = Tx3gBox {
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data_reference_index: 1,
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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::Tx3gBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = Tx3gBox::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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