Re: [FFmpeg-devel] [PATCH] tools/target_enc_fuzzer: Add slices and level for FFv1

[Kacper Michajlow <kasper93@gmail.com>]

On Sun, 11 Aug 2024 at 10:59, Michael Niedermayer
<michael@niedermayer.cc> wrote:
>
> Sponsored-by: Sovereign Tech Fund
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  tools/target_enc_fuzzer.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/tools/target_enc_fuzzer.c b/tools/target_enc_fuzzer.c
> index 059d7830710..59c2db4bb42 100644
> --- a/tools/target_enc_fuzzer.c
> +++ b/tools/target_enc_fuzzer.c
> @@ -149,6 +149,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
>              av_dict_set_int(&opts, "coder", coder, 0);
>              av_dict_set_int(&opts, "context", bytestream2_get_byte(&gbc)&1, 0);
>              av_dict_set_int(&opts, "slicecrc", bytestream2_get_byte(&gbc)&1, 0);
> +            ctx->slices = bytestream2_get_byte(&gbc);
> +            ctx->level = bytestream2_get_byte(&gbc) % 6 - 1;

Note sure that's correct. Depending on the codec numeric level value
may differ, but generally it has higher value. Like 62 for "6.2" in
h264 case, or 186 for "6.2" for h265 case. I would just remove `% 6 -
1` and let fuzzer find interesting values for each codec.

- Kacper

>              break;}
>          }
>      }
> --
> 2.45.2
>
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