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Code Issues Releases Activity

avcodec/vvc/cabac: add palette support

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Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
This commit is contained in:
Wu Jianhua
2025-05-14 21:40:10 +08:00
committed by Nuo Mi
parent a7320efa2b
commit 89ba1bb255
2 changed files with 61 additions and 0 deletions
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52
libavcodec/vvc/cabac.c
View File

@ -1377,6 +1377,58 @@ int ff_vvc_intra_chroma_pred_mode(VVCLocalContext *lc)
return (get_cabac_bypass(&lc->ep->cc) << 1) | get_cabac_bypass(&lc->ep->cc);
}
int ff_vvc_palette_predictor_run(VVCLocalContext *lc)
{
return kth_order_egk_decode(&lc->ep->cc, 0);
}
int ff_vvc_num_signalled_palette_entries(VVCLocalContext *lc)
{
return kth_order_egk_decode(&lc->ep->cc, 0);
}
int ff_vvc_new_palette_entries(VVCLocalContext *lc, const int bit_depth)
{
return fixed_length_decode(&lc->ep->cc, bit_depth);
}
bool ff_vvc_palette_escape_val_present_flag(VVCLocalContext *lc)
{
return get_cabac_bypass(&lc->ep->cc);
}
bool ff_vvc_palette_transpose_flag(VVCLocalContext *lc)
{
return GET_CABAC(PALETTE_TRANSPOSE_FLAG);
}
bool ff_vvc_run_copy_flag(VVCLocalContext *lc, const int prev_run_type, const int prev_run_position, const int cur_pos)
{
uint8_t run_left_lut[] = { 0, 1, 2, 3, 4 };
uint8_t run_top_lut[] = { 5, 6, 6, 7, 7 };
int bin_dist = cur_pos - prev_run_position - 1;
uint8_t *run_lut = prev_run_type == 1 ? run_top_lut : run_left_lut;
uint8_t ctx_inc = bin_dist <= 4 ? run_lut[bin_dist] : run_lut[4];
return GET_CABAC(RUN_COPY_FLAG + ctx_inc);
}
bool ff_vvc_copy_above_palette_indices_flag(VVCLocalContext *lc)
{
return GET_CABAC(COPY_ABOVE_PALETTE_INDICES_FLAG);
}
int ff_vvc_palette_idx_idc(VVCLocalContext *lc, const int max_palette_index, const bool adjust)
{
return truncated_binary_decode(lc, max_palette_index - adjust);
}
int ff_vvc_palette_escape_val(VVCLocalContext *lc)
{
return kth_order_egk_decode(&lc->ep->cc, 5);
}
int ff_vvc_general_merge_flag(VVCLocalContext *lc)
{
return GET_CABAC(GENERAL_MERGE_FLAG);

9
libavcodec/vvc/cabac.h
View File

@ -81,6 +81,15 @@ int ff_vvc_intra_luma_mpm_remainder(VVCLocalContext *lc);
int ff_vvc_cclm_mode_flag(VVCLocalContext *lc);
int ff_vvc_cclm_mode_idx(VVCLocalContext *lc);
int ff_vvc_intra_chroma_pred_mode(VVCLocalContext *lc);
int ff_vvc_palette_predictor_run(VVCLocalContext *lc);
int ff_vvc_num_signalled_palette_entries(VVCLocalContext *lc);
int ff_vvc_new_palette_entries(VVCLocalContext *lc, int bit_dpeth);
bool ff_vvc_palette_escape_val_present_flag(VVCLocalContext *lc);
bool ff_vvc_palette_transpose_flag(VVCLocalContext *lc);
bool ff_vvc_run_copy_flag(VVCLocalContext *lc, int prev_run_type, int prev_run_position, int cur_pos);
bool ff_vvc_copy_above_palette_indices_flag(VVCLocalContext *lc);
int ff_vvc_palette_idx_idc(VVCLocalContext *lc, int max_palette_index, bool adjust);
int ff_vvc_palette_escape_val(VVCLocalContext *lc);
//inter
int ff_vvc_general_merge_flag(VVCLocalContext *lc);