mirror of
https://github.com/alfg/mp4-rust.git
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110 lines
2.6 KiB
Rust
110 lines
2.6 KiB
Rust
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, Eq, Default, Serialize)]
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pub struct PsshBox {
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pub version: u8,
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pub system_id: [u8; 16],
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pub kids: Vec<[u8; 16]>,
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pub data: Vec<u8>,
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}
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impl PsshBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::PsshBox
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}
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pub fn get_size(&self) -> u64 {
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let mut s = HEADER_SIZE + HEADER_EXT_SIZE + 16;
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if self.version > 0 {
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s += 4 + (16 * self.kids.len() as u64);
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}
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s += 4 + self.data.len() as u64;
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s
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}
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}
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impl Mp4Box for PsshBox {
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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!(
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"system_id={:02x?} data_size={}",
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self.system_id,
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self.data.len(),
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);
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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 PsshBox {
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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 mut system_id = [0; 16];
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reader.read_exact(&mut system_id)?;
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let mut kids = Vec::new();
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if version > 0 {
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let kid_count = reader.read_u32::<BigEndian>()?;
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kids.reserve(kid_count as usize);
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for _ in 0..kid_count {
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let mut kid = [0; 16];
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reader.read_exact(&mut kid)?;
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kids.push(kid);
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}
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}
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let data_size = reader.read_u32::<BigEndian>()?;
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let mut data = vec![0; data_size as usize];
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reader.read_exact(&mut data)?;
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skip_bytes_to(reader, start + size)?;
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Ok(PsshBox {
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version,
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system_id,
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kids,
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data,
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})
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}
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}
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impl<W: Write> WriteBox<&mut W> for PsshBox {
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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, 0)?;
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writer.write_all(&self.system_id)?;
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if self.version > 0 {
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writer.write_u32::<BigEndian>(self.kids.len() as u32)?;
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for kid in &self.kids {
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writer.write_all(kid)?;
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}
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}
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writer.write_u32::<BigEndian>(self.data.len() as u32)?;
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writer.write_all(&self.data)?;
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Ok(size)
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}
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}
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