If the last four bytes form a valid start code, the loop would run another time.
Since (start == buf_end), start_code is invalidated so the loop terminates.
However, calling avpriv_find_start_code() with p == end, it will immediately
return due to the zero size buffer. Thus the history is not needed.
---
libavcodec/cbs_mpeg2.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libavcodec/cbs_mpeg2.c b/libavcodec/cbs_mpeg2.c
index f2efedde5d..bf95fb7546 100644
--- a/libavcodec/cbs_mpeg2.c
+++ b/libavcodec/cbs_mpeg2.c
@@ -168,8 +168,9 @@ static int cbs_mpeg2_split_fragment(CodedBitstreamContext
*ctx,
// the next unit will be treated as the last unit.
start_code = 0;
}
-
- end = avpriv_find_start_code(start, buf_end, &start_code, 0);
+ else {
+ end = avpriv_find_start_code(start, buf_end, &start_code, 1);
+ }
start--;
// decrement so start points to the byte containing the
start_code_identifier
// (may be the last byte of fragment->data); end points to the byte
--
2.32.0
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