On Tue, Jun 13, 2023 at 3:37 PM Zhao Zhili <quinkbl...@foxmail.com> wrote:
> From: Zhao Zhili <zhiliz...@tencent.com>
>
> The code after the check skip 21 bytes and then read two bytes.
>
> Signed-off-by: Zhao Zhili <zhiliz...@tencent.com>
> ---
> libavcodec/hevc_parse.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/hevc_parse.c b/libavcodec/hevc_parse.c
> index 1f3beed183..7bc28fd081 100644
> --- a/libavcodec/hevc_parse.c
> +++ b/libavcodec/hevc_parse.c
> @@ -88,8 +88,10 @@ int ff_hevc_decode_extradata(const uint8_t *data, int
> size, HEVCParamSets *ps,
>
> /* data[0] == 1 is configurationVersion from 14496-15.
> * data[0] == 0 is for backward compatibility predates the standard.
> + *
> + * Minimum number of bytes of hvcC with 0 numOfArrays is 23.
> */
> - if (size > 3 && ((data[0] == 1) || (data[0] == 0 && (data[1] ||
> data[2] > 1)))) {
> + if (size >= 23 && ((data[0] == 1) || (data[0] == 0 && (data[1] ||
> data[2] > 1)))) {
>
I think it's better to move the size checking before 21 byte are skipped,
or it'll go to the else logic which
is different.
/* It seems the extradata is encoded as hvcC format. */
> int i, j, num_arrays, nal_len_size;
>
> --
> 2.25.1
>
> _______________________________________________
> 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".
>
_______________________________________________
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".
