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fix /view.mp4 with rel_start

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This was totally broken in commit 1cf27c18. It would serve bytes from the
beginning of the sample file in question, not from the start of the given
range.
This commit is contained in:
Scott Lamb 2017-10-04 22:51:16 -07:00
parent 57985079cc
commit cb18ba44d8
1 changed files with 4 additions and 1 deletions
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5
src/mp4.rs
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@ -1418,10 +1418,12 @@ impl FileInner {
fn get_co64(&self, r: Range<u64>, l: u64) -> Result<Chunk, Error> {
let mut v = Vec::with_capacity(l as usize);
let mut pos = self.initial_sample_byte_pos;
debug!("co64, initial pos={}", pos);
for s in &self.segments {
v.write_u64::<BigEndian>(pos)?;
let r = s.s.sample_file_range();
pos += r.end - r.start;
debug!("co64, pos={} after adding r={:?}", pos, r);
}
Ok(ARefs::new(v).map(|v| &v[r.start as usize .. r.end as usize]))
}
@ -1442,8 +1444,9 @@ impl FileInner {
|p| Ok(p.sample_file_uuid))?
};
let f = self.dir.open_sample_file(uuid)?;
let start = s.s.sample_file_range().start + r.start;
let mmap = Box::new(memmap::Mmap::open_with_offset(
&f, memmap::Protection::Read, r.start as usize, (r.end - r.start) as usize)?);
&f, memmap::Protection::Read, start as usize, (r.end - r.start) as usize)?);
Ok(ARefs::new(mmap).map(|m| unsafe { m.as_slice() }))
}