[FFmpeg-devel] [PATCH 19/25] avcodec/utils: Remove always-true check

Andreas Rheinhardt andreas.rheinhardt at gmail.com
Wed Sep 30 14:14:27 EEST 2020


Andreas Rheinhardt:
> The first thing avcodec_open2() allocates is the AVCodecInternal. If
> allocating it fails, a jump to end occurs; but if an error happens after
> its allocation, a jump to free_and_end happens which frees all
> allocations performed so far and then jumps to end. Yet free_and_end
> contained a check for AVCodecInternal (after having already dereferenced
> it to check whether ff_thread_free() needs to be called) which is of
> course always true. So remove it.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> ---
>  libavcodec/utils.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/libavcodec/utils.c b/libavcodec/utils.c
> index 94b9e94584..8e7c3125aa 100644
> --- a/libavcodec/utils.c
> +++ b/libavcodec/utils.c
> @@ -1043,7 +1043,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
>      av_dict_free(&tmp);
>      av_freep(&avctx->priv_data);
>      av_freep(&avctx->subtitle_header);
> -    if (avci) {
> +
>          av_frame_free(&avci->to_free);
>          av_frame_free(&avci->compat_decode_frame);
>          av_frame_free(&avci->buffer_frame);
> @@ -1056,7 +1056,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
>          av_bsf_free(&avci->bsf);
>  
>          av_buffer_unref(&avci->pool);
> -    }
>      av_freep(&avci);
>      avctx->internal = NULL;
>      avctx->codec = NULL;
> 
Will apply the rest of this patchset this evening unless there are
objections.

- Andreas


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