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https://github.com/alfg/mp4-rust.git
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f8f767dc07
* Add trun box. * Adding Movie Extends Box and subboxes (mvex, mehd, trex).
99 lines
2.4 KiB
Rust
99 lines
2.4 KiB
Rust
use std::io::{Read, Seek, SeekFrom, Write};
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use serde::{Serialize};
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use crate::mp4box::*;
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use crate::mp4box::{mehd::MehdBox, trex::TrexBox};
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#[derive(Debug, Clone, PartialEq, Default, Serialize)]
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pub struct MvexBox {
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pub mehd: MehdBox,
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pub trex: TrexBox,
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}
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impl MvexBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::MdiaBox
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}
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pub fn get_size(&self) -> u64 {
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HEADER_SIZE + self.mehd.box_size() + self.trex.box_size()
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}
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}
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impl Mp4Box for MvexBox {
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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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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!("");
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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 MvexBox {
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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 mut mehd = None;
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let mut trex = None;
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let mut current = reader.seek(SeekFrom::Current(0))?;
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let end = start + size;
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while current < end {
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// Get box header.
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let header = BoxHeader::read(reader)?;
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let BoxHeader { name, size: s } = header;
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match name {
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BoxType::MehdBox => {
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mehd = Some(MehdBox::read_box(reader, s)?);
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}
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BoxType::TrexBox => {
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trex = Some(TrexBox::read_box(reader, s)?);
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}
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_ => {
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// XXX warn!()
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skip_box(reader, s)?;
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}
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}
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current = reader.seek(SeekFrom::Current(0))?;
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}
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if mehd.is_none() {
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return Err(Error::BoxNotFound(BoxType::MehdBox));
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}
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if trex.is_none() {
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return Err(Error::BoxNotFound(BoxType::TrexBox));
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}
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skip_bytes_to(reader, start + size)?;
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Ok(MvexBox {
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mehd: mehd.unwrap(),
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trex: trex.unwrap(),
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})
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}
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}
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impl<W: Write> WriteBox<&mut W> for MvexBox {
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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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self.mehd.write_box(writer)?;
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self.trex.write_box(writer)?;
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Ok(size)
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}
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}
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