Re: [FFmpeg-devel] [PATCH 2/9] avcodec/dynamic_hdr_vivid: fix three spline params

[James Almer <jamrial@gmail.com>]

On 2/24/2023 6:08 PM, Zhao Zhili wrote:
> From: Zhao Zhili <zhilizhao@tencent.com>
> 
> Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
> ---
>   libavcodec/dynamic_hdr_vivid.c | 34 +++++++++++++++++++++++-----------
>   1 file changed, 23 insertions(+), 11 deletions(-)
> 
> diff --git a/libavcodec/dynamic_hdr_vivid.c b/libavcodec/dynamic_hdr_vivid.c
> index d689669dec..35be6f5e2b 100644
> --- a/libavcodec/dynamic_hdr_vivid.c
> +++ b/libavcodec/dynamic_hdr_vivid.c
> @@ -98,26 +98,38 @@ int ff_parse_itu_t_t35_to_dynamic_hdr_vivid(AVDynamicHDRVivid *s, const uint8_t
>                               return AVERROR_INVALIDDATA;
>                           tm_params->three_Spline_enable_flag = get_bits(gb, 1);
>                           if (tm_params->three_Spline_enable_flag) {
> +                            AVHDRVivid3SplineParams *three_spline;
> +
>                               if (get_bits_left(gb) < 1 + tm_params->three_Spline_num * (2 + 12 + 28 + 1))
>                                   return AVERROR_INVALIDDATA;
>                               tm_params->three_Spline_num = get_bits(gb, 1) + 1;
> +                            if (tm_params->three_Spline_num > FF_ARRAY_ELEMS(tm_params->three_spline))
> +                                return AVERROR_INVALIDDATA;
>                               for (int j = 0; j < tm_params->three_Spline_num; j++) {
> -                                tm_params->three_Spline_TH_mode = get_bits(gb, 2);
> -                                if (tm_params->three_Spline_TH_mode == 0 || tm_params->three_Spline_TH_mode == 2) {
> +                                three_spline = tm_params->three_spline + j;

Preferably do:

three_spline = &tm_params->three_spline[j];

> +                                three_spline->th_mode = get_bits(gb, 2);
> +                                if (three_spline->th_mode == 0 || three_spline->th_mode == 2) {
>                                       if (get_bits_left(gb) < 8)
>                                           return AVERROR_INVALIDDATA;
> -                                    tm_params->three_Spline_TH_enable_MB = (AVRational){get_bits(gb, 8),  255};
> +                                    three_spline->th_enable_mb = (AVRational){get_bits(gb, 8),  255};
>                                   }
> -                                tm_params->three_Spline_TH_enable = (AVRational){get_bits(gb, 12),  4095};
> -                                tm_params->three_Spline_TH_Delta1 = (AVRational){get_bits(gb, 10),  1023};
> -                                tm_params->three_Spline_TH_Delta2 = (AVRational){get_bits(gb, 10),  1023};
> -                                tm_params->three_Spline_enable_Strength = (AVRational){get_bits(gb,  8),  255};
> +                                three_spline->th_enable = (AVRational){get_bits(gb, 12),  4095};
> +                                three_spline->th_delta1 = (AVRational){get_bits(gb, 10),  1023};
> +                                three_spline->th_delta2 = (AVRational){get_bits(gb, 10),  1023};
> +                                three_spline->enable_strength = (AVRational){get_bits(gb,  8),  255};
>                               }
> -                        } else {
> -                            tm_params->three_Spline_num     = 1;
> -                            tm_params->three_Spline_TH_mode = 0;
> +#if FF_API_HDR_VIVID_THREE_SPLINE
> +                            three_spline = tm_params->three_spline;

Also here:

three_spline = &tm_params->three_spline[0];

Same in every other case in this patchset.

> +                            AV_NOWARN_DEPRECATED(

This is an internal file, so use the FF_DISABLE_DEPRECATION_WARNINGS and 
FF_ENABLE_DEPRECATION_WARNINGS wrappers instead of the public one.

> +                            tm_params->three_Spline_TH_mode = three_spline->th_mode;
> +                            tm_params->three_Spline_TH_enable_MB = three_spline->th_enable_mb;
> +                            tm_params->three_Spline_TH_enable = three_spline->th_enable;
> +                            tm_params->three_Spline_TH_Delta1 = three_spline->th_delta1;
> +                            tm_params->three_Spline_TH_Delta2 = three_spline->th_delta2;
> +                            tm_params->three_Spline_enable_Strength = three_spline->enable_strength;
> +                            )
> +#endif
>                           }
> -
>                       }
>                   }
>               }
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