avi: skip chunks from unknown streams

[nihav.git] / nihav-commonfmt / src / demuxers / avi.rs

diff --git a/nihav-commonfmt/src/demuxers/avi.rs b/nihav-commonfmt/src/demuxers/avi.rs
index 2329ae9be27c0ff893f453b697652060b8b4c8d8..dc8ea6bac1cf94d8faee065b996fb387c134f4bf 100644 (file)
--- a/nihav-commonfmt/src/demuxers/avi.rs
+++ b/nihav-commonfmt/src/demuxers/avi.rs
@@ -140,11 +140,16 @@ impl<'a> DemuxCore<'a> for AVIDemuxer<'a> {
                 continue;
             }
             if (tag[0] == b'i' && tag[1] == b'x') || (&tag == b"idx1") {
+                let idx_pos = self.src.tell() - 8;
                 if !self.odml {
                     return Err(EOF);
                 }
                 self.src.read_skip(size)?;
-                self.try_next_odml_chunk()?;
+                if idx_pos > self.movi_pos {
+                    self.try_next_odml_chunk()?;
+                } else {
+                    self.movi_pos = self.src.tell();
+                }
                 continue;
             }
             if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
@@ -163,7 +168,11 @@ impl<'a> DemuxCore<'a> for AVIDemuxer<'a> {
                 continue;
             }
             let str = strmgr.get_stream(stream_no as usize);
-            if str.is_none() { return Err(InvalidData); }
+            if str.is_none() {
+                self.src.read_skip(size)?;
+                self.movi_size -= size + 8;
+                continue;
+            }
             let stream = str.unwrap();
             if size == 0 {
                 self.movi_size -= 8;
@@ -814,7 +823,7 @@ fn parse_odml_ix(src: &mut ByteReader, strmgr: &mut StreamManager, seek_idx: &mu
     let idx_type = src.read_byte()?;
     validate!(sub_type == 0 && idx_type == 1);
     let entries = src.read_u32le()? as usize;
-    validate!(size == 24 + entries * 4 * entry_size);
+    validate!(size >= 24 + entries * 4 * entry_size);
     src.read_tag()?; //chunk id
     let base_offset = src.read_u64le()?;
     src.read_u32le()?; //reserved