Re: [FFmpeg-devel] [PATCH 3/9] avcodec/vvc/ctu: Simplify pred_mode_plt_flag

[Nuo Mi <nuomi2021@gmail.com>]

On Sun, May 19, 2024 at 10:49 AM Michael Niedermayer <michael@niedermayer.cc>
wrote:

> Fixes: CID1560039 Logically dead code
>
> Sponsored-by: Sovereign Tech Fund
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  libavcodec/vvc/ctu.c | 23 ++++++-----------------
>  1 file changed, 6 insertions(+), 17 deletions(-)
>
> diff --git a/libavcodec/vvc/ctu.c b/libavcodec/vvc/ctu.c
> index 7495ced0d5a..b7089b9a004 100644
> --- a/libavcodec/vvc/ctu.c
> +++ b/libavcodec/vvc/ctu.c
> @@ -1793,7 +1793,6 @@ static int hls_coding_unit(VVCLocalContext *lc, int
> x0, int y0, int cb_width, in
>      const int hs                    = sps->hshift[CHROMA];
>      const int vs                    = sps->vshift[CHROMA];
>      const int is_128                = cb_width > 64 || cb_height > 64;
> -    int pred_mode_plt_flag          = 0;
>      int ret;
>
>      CodingUnit *cu = add_cu(lc, x0, y0, cb_width, cb_height, cqt_depth,
> tree_type);
> @@ -1811,7 +1810,7 @@ static int hls_coding_unit(VVCLocalContext *lc, int
> x0, int y0, int cb_width, in
>          mode_type != MODE_TYPE_INTER && ((cb_width * cb_height) >
>          (tree_type != DUAL_TREE_CHROMA ? 16 : (16 << hs << vs))) &&
>          (mode_type != MODE_TYPE_INTRA || tree_type != DUAL_TREE_CHROMA)) {
> -        pred_mode_plt_flag = ff_vvc_pred_mode_plt_flag(lc);
> +        int pred_mode_plt_flag = ff_vvc_pred_mode_plt_flag(lc);
>          if (pred_mode_plt_flag) {
>              avpriv_report_missing_feature(fc->log_ctx, "Palette");
>              return AVERROR_PATCHWELCOME;
> @@ -1823,31 +1822,21 @@ static int hls_coding_unit(VVCLocalContext *lc,
> int x0, int y0, int cb_width, in
>      }
>      if (cu->pred_mode == MODE_INTRA || cu->pred_mode == MODE_PLT) {
>          if (tree_type == SINGLE_TREE || tree_type == DUAL_TREE_LUMA) {
> -            if (pred_mode_plt_flag) {
> -                avpriv_report_missing_feature(fc->log_ctx, "Palette");
> -                return AVERROR_PATCHWELCOME;
> -            } else {
> -                intra_luma_pred_modes(lc);
> -            }
> +            intra_luma_pred_modes(lc);
>              ff_vvc_set_intra_mvf(lc, 0);
>          }
>          if ((tree_type == SINGLE_TREE || tree_type == DUAL_TREE_CHROMA)
> && sps->r->sps_chroma_format_idc) {
> -            if (pred_mode_plt_flag && tree_type == DUAL_TREE_CHROMA) {
> -                avpriv_report_missing_feature(fc->log_ctx, "Palette");
> -                return AVERROR_PATCHWELCOME;
> -            } else if (!pred_mode_plt_flag) {
> -                if (!cu->act_enabled_flag)
> -                    intra_chroma_pred_modes(lc);
> -            }
> +            if (!cu->act_enabled_flag)
> +                intra_chroma_pred_modes(lc);
>          }
>      } else if (tree_type != DUAL_TREE_CHROMA) { /* MODE_INTER or MODE_IBC
> */
>          if ((ret = inter_data(lc)) < 0)
>              return ret;
>      }
> -    if (cu->pred_mode != MODE_INTRA && !pred_mode_plt_flag &&
> !lc->cu->pu.general_merge_flag)
> +    if (cu->pred_mode != MODE_INTRA && !lc->cu->pu.general_merge_flag)
>          cu->coded_flag = ff_vvc_cu_coded_flag(lc);
>      else
> -        cu->coded_flag = !(cu->skip_flag || pred_mode_plt_flag);
> +        cu->coded_flag = !(cu->skip_flag);
>
>      if (cu->coded_flag) {
>          sbt_info(lc, sps);
> --
> 2.45.1
>
Hi  Michael,
Could we skip this one?
Thanks to Jianhua's help. We may have Palette support in the next month.

Thank you

>
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