From: Frank Plowman <p...@frankplowman.com>
Reduce false positives for VVC files by adding additional checks in
`vvc_probe`. Specifically, `nuh_temporal_id_plus1` is tested for valid
values in extra cases depending on the NAL unit type, as per ITU-T H.266
section 7.4.2.2.
Resolves trac #10703.
Signed-off-by: Frank Plowman <p...@frankplowman.com>
---
libavformat/vvcdec.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libavformat/vvcdec.c b/libavformat/vvcdec.c
index 31c5ae1f14..57d2769465 100644
--- a/libavformat/vvcdec.c
+++ b/libavformat/vvcdec.c
@@ -35,11 +35,17 @@ static int vvc_probe(const AVProbeData *p)
if ((code & 0xffffff00) == 0x100) {
uint8_t nal2 = p->buf[i + 1];
int type = (nal2 & 0xF8) >> 3;
+ const uint8_t nuh_temporal_id_plus1 = nal2 & 0x7;
if (code & 0x80) // forbidden_zero_bit
return 0;
- if ((nal2 & 0x7) == 0) // nuh_temporal_id_plus1
+ if (nuh_temporal_id_plus1 == 0) // nuh_temporal_id_plus1
+ return 0;
+ if (nuh_temporal_id_plus1 != 1 && (type >= VVC_IDR_W_RADL && type
<= VVC_RSV_IRAP_11
+ || type == VVC_DCI_NUT || type ==
VVC_OPI_NUT
+ || type == VVC_VPS_NUT || type ==
VVC_SPS_NUT
+ || type == VVC_EOS_NUT || type ==
VVC_EOB_NUT))
return 0;
switch (type) {
--
2.43.0
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
