[FFmpeg-devel] [PATCH] libavcodec/hevcdec: detect non-conformant missing refs

[Anton Khirnov]

Quoting Xiaolei Yu (2022-04-05 08:49:24)
> 
> For cases which prefer rejecting broken bitstreams.
> ---
>  libavcodec/hevc_refs.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
> 
> diff --git a/libavcodec/hevc_refs.c b/libavcodec/hevc_refs.c
> index fe18ca2b1d..7ea70e301b 100644
> --- a/libavcodec/hevc_refs.c
> +++ b/libavcodec/hevc_refs.c
> @@ -426,7 +426,7 @@ static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
>  
>  /* add a reference with the given poc to the list and mark it as used in DPB */
>  static int add_candidate_ref(HEVCContext *s, RefPicList *list,
> -                             int poc, int ref_flag, uint8_t use_msb)
> +                             int poc, int ref_flag, uint8_t use_msb, int maybe_missing)

allow_missing would be clearer IMO

>  {
>      HEVCFrame *ref = find_ref_idx(s, poc, use_msb);
>  
> @@ -434,6 +434,9 @@ static int add_candidate_ref(HEVCContext *s, RefPicList *list,
>          return AVERROR_INVALIDDATA;
>  
>      if (!ref) {
> +        if ((s->avctx->err_recognition & AV_EF_COMPLIANT) && !maybe_missing)

a log message would be nice, so one can easily tell where exactly the
error comes from

-- 
Anton Khirnov