Re: [FFmpeg-devel] [PATCH v8 08/14] avutil/frame: add helper for getting side data from array

[James Almer <jamrial@gmail.com>]

On 3/11/2024 5:58 PM, Jan Ekström wrote:
> ---
>   libavutil/frame.c | 20 +++++++++++++++-----
>   libavutil/frame.h | 14 ++++++++++++++
>   2 files changed, 29 insertions(+), 5 deletions(-)
> 
> diff --git a/libavutil/frame.c b/libavutil/frame.c
> index 30db83a5e5..47ecd964b8 100644
> --- a/libavutil/frame.c
> +++ b/libavutil/frame.c
> @@ -830,16 +830,26 @@ int av_frame_side_data_clone(AVFrameSideData ***sd, int *nb_sd,
>       return 0;
>   }
>   
> -AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
> -                                        enum AVFrameSideDataType type)
> +const AVFrameSideData *av_frame_side_data_get(const AVFrameSideData **sd,
> +                                              const int nb_sd,
> +                                              enum AVFrameSideDataType type)
>   {
> -    for (int i = 0; i < frame->nb_side_data; i++) {
> -        if (frame->side_data[i]->type == type)
> -            return frame->side_data[i];
> +    for (int i = 0; i < nb_sd; i++) {
> +        if (sd[i]->type == type)
> +            return sd[i];
>       }
>       return NULL;
>   }
>   
> +AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
> +                                        enum AVFrameSideDataType type)
> +{
> +    return (AVFrameSideData *)av_frame_side_data_get(
> +        (const AVFrameSideData **)frame->side_data, frame->nb_side_data,
> +        type
> +    );
> +}
> +
>   static int frame_copy_video(AVFrame *dst, const AVFrame *src)
>   {
>       int planes;
> diff --git a/libavutil/frame.h b/libavutil/frame.h
> index a7e62ded15..e59f033cce 100644
> --- a/libavutil/frame.h
> +++ b/libavutil/frame.h
> @@ -1062,6 +1062,20 @@ AVFrameSideData *av_frame_side_data_add(AVFrameSideData ***sd, int *nb_sd,
>   int av_frame_side_data_clone(AVFrameSideData ***sd, int *nb_sd,
>                                const AVFrameSideData *src, unsigned int flags);
>   
> +/**
> + * Get a side data entry of a specific type from an array.
> + *
> + * @param sd    array of side data.
> + * @param nb_sd integer containing the number of entries in the array.
> + * @param type  type of side data to be queried
> + *
> + * @return a pointer to the side data of a given type on success, NULL if there
> + *         is no side data with such type in this set.
> + */
> +const AVFrameSideData *av_frame_side_data_get(const AVFrameSideData **sd,
> +                                              const int nb_sd,
> +                                              enum AVFrameSideDataType type);
> +
>   /**
>    * @}
>    */

LGTM.
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