From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 31 Mar 2026 16:04:41 +0000 (+0200)
Subject: mov: support reading co64 atom
X-Git-Url: https://git.nihav.org/?a=commitdiff_plain;h=7232a8b9c763205123d5a57be9ddcb131a8db34f;p=nihav.git

mov: support reading co64 atom
---

diff --git a/nihav-commonfmt/src/demuxers/mov.rs b/nihav-commonfmt/src/demuxers/mov.rs
index c7bd456..47c0728 100644
--- a/nihav-commonfmt/src/demuxers/mov.rs
+++ b/nihav-commonfmt/src/demuxers/mov.rs
@@ -572,6 +572,7 @@ const STBL_CHUNK_HANDLERS: &[TrackChunkHandler] = &[
     TrackChunkHandler { ctype: mktag!(b"stsc"), parse: read_stsc },
     TrackChunkHandler { ctype: mktag!(b"stsz"), parse: read_stsz },
     TrackChunkHandler { ctype: mktag!(b"stco"), parse: read_stco },
+    TrackChunkHandler { ctype: mktag!(b"co64"), parse: read_co64 },
     TrackChunkHandler { ctype: mktag!(b"stsh"), parse: skip_chunk },
     TrackChunkHandler { ctype: mktag!(b"ctts"), parse: read_ctts },
 ];
@@ -1039,6 +1040,17 @@ fn read_stco(track: &mut Track, br: &mut dyn ByteIO, size: u64) -> DemuxerResult
     Ok(size)
 }
 
+fn read_co64(track: &mut Track, br: &mut dyn ByteIO, size: u64) -> DemuxerResult<u64> {
+    let version             = br.read_byte()?;
+    validate!(version == 0);
+    let _flags              = br.read_u24be()?;
+    let entries             = br.read_u32be()? as usize;
+    validate!(entries > 0 && (entries * 8 + 8) as u64 == size);
+    track.chunk_offsets = vec![0; entries];
+                              br.read_u64be_arr(&mut track.chunk_offsets)?;
+    Ok(size)
+}
+
 fn read_ctts(track: &mut Track, br: &mut dyn ByteIO, size: u64) -> DemuxerResult<u64> {
     validate!(size >= 8);
     let version             = br.read_byte()?;