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https://github.com/alfg/mp4-rust.git
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115 lines
3.1 KiB
Rust
115 lines
3.1 KiB
Rust
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, Default)]
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pub struct FtypBox {
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pub major_brand: FourCC,
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pub minor_version: u32,
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pub compatible_brands: Vec<FourCC>,
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}
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impl FtypBox {
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pub fn get_type(&self) -> BoxType {
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BoxType::FtypBox
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}
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pub fn get_size(&self) -> u64 {
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HEADER_SIZE + 8 + (4 * self.compatible_brands.len() as u64)
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}
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}
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impl Mp4Box for FtypBox {
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fn box_type(&self) -> BoxType {
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BoxType::FtypBox
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}
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fn box_size(&self) -> u64 {
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HEADER_SIZE + 8 + (4 * self.compatible_brands.len() as u64)
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}
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}
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impl<R: Read + Seek> ReadBox<&mut R> for FtypBox {
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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 major = reader.read_u32::<BigEndian>()?;
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let minor = reader.read_u32::<BigEndian>()?;
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if size % 4 != 0 {
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return Err(Error::InvalidData("invalid ftyp size"));
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}
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let brand_count = (size - 16) / 4; // header + major + minor
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let mut brands = Vec::new();
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for _ in 0..brand_count {
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let b = reader.read_u32::<BigEndian>()?;
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brands.push(From::from(b));
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}
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skip_bytes_to(reader, start + size)?;
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Ok(FtypBox {
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major_brand: From::from(major),
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minor_version: minor,
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compatible_brands: brands,
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})
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}
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}
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impl<W: Write> WriteBox<&mut W> for FtypBox {
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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>((&self.major_brand).into())?;
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writer.write_u32::<BigEndian>(self.minor_version)?;
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for b in self.compatible_brands.iter() {
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writer.write_u32::<BigEndian>(b.into())?;
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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_ftyp() {
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let src_box = FtypBox {
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major_brand: FourCC {
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value: String::from("isom"),
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},
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minor_version: 0,
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compatible_brands: vec![
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FourCC {
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value: String::from("isom"),
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},
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FourCC {
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value: String::from("iso2"),
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},
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FourCC {
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value: String::from("avc1"),
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},
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FourCC {
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value: String::from("mp41"),
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},
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],
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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::FtypBox);
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assert_eq!(src_box.box_size(), header.size);
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let dst_box = FtypBox::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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