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authorAndreas Rheinhardt <andreas.rheinhardt@outlook.com>2024-04-04 04:14:58 +0200
committerAndreas Rheinhardt <andreas.rheinhardt@outlook.com>2024-04-04 16:45:00 +0200
commitdb063212c8dde0d6082856935e2b2275230bc365 (patch)
tree69d3fa02629b16fd8150b04b6266b4b86a0e9087 /libavcodec/vvc/cabac.c
parent486a2b964ba4e496ecd821e189d495ad06585abe (diff)
downloadffmpeg-db063212c8dde0d6082856935e2b2275230bc365.tar.gz
avcodec/vvc: Rename vvc_?foo->foo
A namespace is unnecessary here given that all these files are already in the vvc subfolder. Reviewed-by: Nuo Mi <nuomi2021@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/vvc/cabac.c')
-rw-r--r--libavcodec/vvc/cabac.c2478
1 files changed, 2478 insertions, 0 deletions
diff --git a/libavcodec/vvc/cabac.c b/libavcodec/vvc/cabac.c
new file mode 100644
index 0000000000..a5ccccd1c0
--- /dev/null
+++ b/libavcodec/vvc/cabac.c
@@ -0,0 +1,2478 @@
+/*
+ * VVC CABAC decoder
+ *
+ * Copyright (C) 2021 Nuo Mi
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "libavcodec/cabac_functions.h"
+
+#include "cabac.h"
+#include "ctu.h"
+#include "data.h"
+
+#define CABAC_MAX_BIN 31
+
+#define CNU 35
+
+enum SyntaxElement {
+ ALF_CTB_FLAG = 0,
+ ALF_USE_APS_FLAG = ALF_CTB_FLAG + 9,
+ ALF_CTB_CC_CB_IDC,
+ ALF_CTB_CC_CR_IDC = ALF_CTB_CC_CB_IDC + 3,
+ ALF_CTB_FILTER_ALT_IDX = ALF_CTB_CC_CR_IDC + 3,
+ SAO_MERGE_FLAG = ALF_CTB_FILTER_ALT_IDX + 2,
+ SAO_TYPE_IDX,
+ SPLIT_CU_FLAG,
+ SPLIT_QT_FLAG = SPLIT_CU_FLAG + 9,
+ MTT_SPLIT_CU_VERTICAL_FLAG = SPLIT_QT_FLAG + 6,
+ MTT_SPLIT_CU_BINARY_FLAG = MTT_SPLIT_CU_VERTICAL_FLAG + 5,
+ NON_INTER_FLAG = MTT_SPLIT_CU_BINARY_FLAG + 4,
+ CU_SKIP_FLAG = NON_INTER_FLAG + 2,
+ PRED_MODE_IBC_FLAG = CU_SKIP_FLAG + 3,
+ PRED_MODE_FLAG = PRED_MODE_IBC_FLAG + 3,
+ PRED_MODE_PLT_FLAG = PRED_MODE_FLAG + 2,
+ CU_ACT_ENABLED_FLAG,
+ INTRA_BDPCM_LUMA_FLAG,
+ INTRA_BDPCM_LUMA_DIR_FLAG,
+ INTRA_MIP_FLAG,
+ INTRA_LUMA_REF_IDX = INTRA_MIP_FLAG + 4,
+ INTRA_SUBPARTITIONS_MODE_FLAG = INTRA_LUMA_REF_IDX + 2,
+ INTRA_SUBPARTITIONS_SPLIT_FLAG,
+ INTRA_LUMA_MPM_FLAG,
+ INTRA_LUMA_NOT_PLANAR_FLAG,
+ INTRA_BDPCM_CHROMA_FLAG = INTRA_LUMA_NOT_PLANAR_FLAG + 2,
+ INTRA_BDPCM_CHROMA_DIR_FLAG,
+ CCLM_MODE_FLAG,
+ CCLM_MODE_IDX,
+ INTRA_CHROMA_PRED_MODE,
+ GENERAL_MERGE_FLAG,
+ INTER_PRED_IDC,
+ INTER_AFFINE_FLAG = INTER_PRED_IDC + 6,
+ CU_AFFINE_TYPE_FLAG = INTER_AFFINE_FLAG + 3,
+ SYM_MVD_FLAG,
+ REF_IDX_LX,
+ MVP_LX_FLAG = REF_IDX_LX + 2,
+ AMVR_FLAG,
+ AMVR_PRECISION_IDX = AMVR_FLAG + 2,
+ BCW_IDX = AMVR_PRECISION_IDX + 3,
+ CU_CODED_FLAG,
+ CU_SBT_FLAG,
+ CU_SBT_QUAD_FLAG = CU_SBT_FLAG + 2,
+ CU_SBT_HORIZONTAL_FLAG,
+ CU_SBT_POS_FLAG = CU_SBT_HORIZONTAL_FLAG + 3,
+ LFNST_IDX,
+ MTS_IDX = LFNST_IDX + 3,
+ COPY_ABOVE_PALETTE_INDICES_FLAG = MTS_IDX + 4,
+ PALETTE_TRANSPOSE_FLAG,
+ RUN_COPY_FLAG,
+ REGULAR_MERGE_FLAG = RUN_COPY_FLAG + 8,
+ MMVD_MERGE_FLAG = REGULAR_MERGE_FLAG + 2,
+ MMVD_CAND_FLAG,
+ MMVD_DISTANCE_IDX,
+ CIIP_FLAG,
+ MERGE_SUBBLOCK_FLAG,
+ MERGE_SUBBLOCK_IDX = MERGE_SUBBLOCK_FLAG + 3,
+ MERGE_IDX,
+ ABS_MVD_GREATER0_FLAG,
+ ABS_MVD_GREATER1_FLAG,
+ TU_Y_CODED_FLAG,
+ TU_CB_CODED_FLAG = TU_Y_CODED_FLAG + 4,
+ TU_CR_CODED_FLAG = TU_CB_CODED_FLAG + 2,
+ CU_QP_DELTA_ABS = TU_CR_CODED_FLAG + 3,
+ CU_CHROMA_QP_OFFSET_FLAG = CU_QP_DELTA_ABS + 2,
+ CU_CHROMA_QP_OFFSET_IDX,
+ TRANSFORM_SKIP_FLAG,
+ TU_JOINT_CBCR_RESIDUAL_FLAG = TRANSFORM_SKIP_FLAG + 2,
+ LAST_SIG_COEFF_X_PREFIX = TU_JOINT_CBCR_RESIDUAL_FLAG + 3,
+ LAST_SIG_COEFF_Y_PREFIX = LAST_SIG_COEFF_X_PREFIX +23,
+ SB_CODED_FLAG = LAST_SIG_COEFF_Y_PREFIX +23,
+ SIG_COEFF_FLAG = SB_CODED_FLAG + 7,
+ PAR_LEVEL_FLAG = SIG_COEFF_FLAG +63,
+ ABS_LEVEL_GTX_FLAG = PAR_LEVEL_FLAG +33,
+ COEFF_SIGN_FLAG = ABS_LEVEL_GTX_FLAG +72,
+ SYNTAX_ELEMENT_LAST = COEFF_SIGN_FLAG + 6,
+};
+
+static const uint8_t init_values[4][SYNTAX_ELEMENT_LAST] = {
+ {
+ //alf_ctb_flag
+ 62, 39, 39, 54, 39, 39, 31, 39, 39,
+ //alf_use_aps_flag
+ 46,
+ //alf_ctb_cc_cb_idc
+ 18, 30, 31,
+ //alf_ctb_cc_cr_idc
+ 18, 30, 31,
+ //alf_ctb_filter_alt_idx
+ 11, 11,
+ //sao_merge_left_flag and sao_merge_up_flag
+ 60,
+ //sao_type_idx_luma and sao_type_idx_chroma
+ 13,
+ //split_cu_flag
+ 19, 28, 38, 27, 29, 38, 20, 30, 31,
+ //split_qt_flag
+ 27, 6, 15, 25, 19, 37,
+ //mtt_split_cu_vertical_flag
+ 43, 42, 29, 27, 44,
+ //mtt_split_cu_binary_flag
+ 36, 45, 36, 45,
+ //non_inter_flag
+ CNU, CNU,
+ //cu_skip_flag
+ 0, 26, 28,
+ //pred_mode_ibc_flag
+ 17, 42, 36,
+ //pred_mode_flag
+ CNU, CNU,
+ //pred_mode_plt_flag
+ 25,
+ //cu_act_enabled_flag
+ 52,
+ //intra_bdpcm_luma_flag
+ 19,
+ //intra_bdpcm_luma_dir_flag
+ 35,
+ //intra_mip_flag
+ 33, 49, 50, 25,
+ //intra_luma_ref_idx
+ 25, 60,
+ //intra_subpartitions_mode_flag
+ 33,
+ //intra_subpartitions_split_flag
+ 43,
+ //intra_luma_mpm_flag
+ 45,
+ //intra_luma_not_planar_flag
+ 13, 28,
+ //intra_bdpcm_chroma_flag
+ 1,
+ //intra_bdpcm_chroma_dir_flag
+ 27,
+ //cclm_mode_flag
+ 59,
+ //cclm_mode_idx
+ 27,
+ //intra_chroma_pred_mode
+ 34,
+ //general_merge_flag
+ 26,
+ //inter_pred_idc
+ CNU, CNU, CNU, CNU, CNU, CNU,
+ //inter_affine_flag
+ CNU, CNU, CNU,
+ //cu_affine_type_flag
+ CNU,
+ //sym_mvd_flag
+ CNU,
+ //ref_idx_l0 and ref_idx_l1
+ CNU, CNU,
+ //mvp_l0_flag and mvp_l1_flag
+ 42,
+ //amvr_flag
+ CNU, CNU,
+ //amvr_precision_idx
+ 35, 34, 35,
+ //bcw_idx
+ CNU,
+ //cu_coded_flag
+ 6,
+ //cu_sbt_flag
+ CNU, CNU,
+ //cu_sbt_quad_flag
+ CNU,
+ //cu_sbt_horizontal_flag
+ CNU, CNU, CNU,
+ //cu_sbt_pos_flag
+ CNU,
+ //lfnst_idx
+ 28, 52, 42,
+ //mts_idx
+ 29, 0, 28, 0,
+ //copy_above_palette_indices_flag
+ 42,
+ //palette_transpose_flag
+ 42,
+ //run_copy_flag
+ 50, 37, 45, 30, 46, 45, 38, 46,
+ //regular_merge_flag
+ CNU, CNU,
+ //mmvd_merge_flag
+ CNU,
+ //mmvd_cand_flag
+ CNU,
+ //mmvd_distance_idx
+ CNU,
+ //ciip_flag
+ CNU,
+ //merge_subblock_flag
+ CNU, CNU, CNU,
+ //merge_subblock_idx
+ CNU,
+ //merge_idx, merge_gpm_idx0, and merge_gpm_idx1
+ 34,
+ //abs_mvd_greater0_flag
+ 14,
+ //abs_mvd_greater1_flag
+ 45,
+ //tu_y_coded_flag
+ 15, 12, 5, 7,
+ //tu_cb_coded_flag
+ 12, 21,
+ //tu_cr_coded_flag
+ 33, 28, 36,
+ //cu_qp_delta_abs
+ CNU, CNU,
+ //cu_chroma_qp_offset_flag
+ CNU,
+ //cu_chroma_qp_offset_idx
+ CNU,
+ //transform_skip_flag
+ 25, 9,
+ //tu_joint_cbcr_residual_flag
+ 12, 21, 35,
+ //last_sig_coeff_x_prefix
+ 13, 5, 4, 21, 14, 4, 6, 14, 21, 11, 14, 7, 14, 5, 11, 21,
+ 30, 22, 13, 42, 12, 4, 3,
+ //last_sig_coeff_y_prefix
+ 13, 5, 4, 6, 13, 11, 14, 6, 5, 3, 14, 22, 6, 4, 3, 6,
+ 22, 29, 20, 34, 12, 4, 3,
+ //sb_coded_flag
+ 18, 31, 25, 15, 18, 20, 38,
+ //sig_coeff_flag
+ 25, 19, 28, 14, 25, 20, 29, 30, 19, 37, 30, 38, 11, 38, 46, 54,
+ 27, 39, 39, 39, 44, 39, 39, 39, 18, 39, 39, 39, 27, 39, 39, 39,
+ 0, 39, 39, 39, 25, 27, 28, 37, 34, 53, 53, 46, 19, 46, 38, 39,
+ 52, 39, 39, 39, 11, 39, 39, 39, 19, 39, 39, 39, 25, 28, 38,
+ //par_level_flag
+ 33, 25, 18, 26, 34, 27, 25, 26, 19, 42, 35, 33, 19, 27, 35, 35,
+ 34, 42, 20, 43, 20, 33, 25, 26, 42, 19, 27, 26, 50, 35, 20, 43,
+ 11,
+ //abs_level_gtx_flag
+ 25, 25, 11, 27, 20, 21, 33, 12, 28, 21, 22, 34, 28, 29, 29, 30,
+ 36, 29, 45, 30, 23, 40, 33, 27, 28, 21, 37, 36, 37, 45, 38, 46,
+ 25, 1, 40, 25, 33, 11, 17, 25, 25, 18, 4, 17, 33, 26, 19, 13,
+ 33, 19, 20, 28, 22, 40, 9, 25, 18, 26, 35, 25, 26, 35, 28, 37,
+ 11, 5, 5, 14, 10, 3, 3, 3,
+ //coeff_sign_flag
+ 12, 17, 46, 28, 25, 46,
+ },
+ {
+ //alf_ctb_flag
+ 13, 23, 46, 4, 61, 54, 19, 46, 54,
+ //alf_use_aps_flag
+ 46,
+ //alf_ctb_cc_cb_idc
+ 18, 21, 38,
+ //alf_ctb_cc_cr_idc
+ 18, 21, 38,
+ //alf_ctb_filter_alt_idx
+ 20, 12,
+ //sao_merge_left_flag and sao_merge_up_flag
+ 60,
+ //sao_type_idx_luma and sao_type_idx_chroma
+ 5,
+ //split_cu_flag
+ 11, 35, 53, 12, 6, 30, 13, 15, 31,
+ //split_qt_flag
+ 20, 14, 23, 18, 19, 6,
+ //mtt_split_cu_vertical_flag
+ 43, 35, 37, 34, 52,
+ //mtt_split_cu_binary_flag
+ 43, 37, 21, 22,
+ //non_inter_flag
+ 25, 12,
+ //cu_skip_flag
+ 57, 59, 45,
+ //pred_mode_ibc_flag
+ 0, 57, 44,
+ //pred_mode_flag
+ 40, 35,
+ //pred_mode_plt_flag
+ 0,
+ //cu_act_enabled_flag
+ 46,
+ //intra_bdpcm_luma_flag
+ 40,
+ //intra_bdpcm_luma_dir_flag
+ 36,
+ //intra_mip_flag
+ 41, 57, 58, 26,
+ //intra_luma_ref_idx
+ 25, 58,
+ //intra_subpartitions_mode_flag
+ 33,
+ //intra_subpartitions_split_flag
+ 36,
+ //intra_luma_mpm_flag
+ 36,
+ //intra_luma_not_planar_flag
+ 12, 20,
+ //intra_bdpcm_chroma_flag
+ 0,
+ //intra_bdpcm_chroma_dir_flag
+ 13,
+ //cclm_mode_flag
+ 34,
+ //cclm_mode_idx
+ 27,
+ //intra_chroma_pred_mode
+ 25,
+ //general_merge_flag
+ 21,
+ //inter_pred_idc
+ 7, 6, 5, 12, 4, 40,
+ //inter_affine_flag
+ 12, 13, 14,
+ //cu_affine_type_flag
+ 35,
+ //sym_mvd_flag
+ 28,
+ //ref_idx_l0 and ref_idx_l1
+ 20, 35,
+ //mvp_l0_flag and mvp_l1_flag
+ 34,
+ //amvr_flag
+ 59, 58,
+ //amvr_precision_idx
+ 60, 48, 60,
+ //bcw_idx
+ 4,
+ //cu_coded_flag
+ 5,
+ //cu_sbt_flag
+ 56, 57,
+ //cu_sbt_quad_flag
+ 42,
+ //cu_sbt_horizontal_flag
+ 20, 43, 12,
+ //cu_sbt_pos_flag
+ 28,
+ //lfnst_idx
+ 37, 45, 27,
+ //mts_idx
+ 45, 40, 27, 0,
+ //copy_above_palette_indices_flag
+ 59,
+ //palette_transpose_flag
+ 42,
+ //run_copy_flag
+ 51, 30, 30, 38, 23, 38, 53, 46,
+ //regular_merge_flag
+ 38, 7,
+ //mmvd_merge_flag
+ 26,
+ //mmvd_cand_flag
+ 43,
+ //mmvd_distance_idx
+ 60,
+ //ciip_flag
+ 57,
+ //merge_subblock_flag
+ 48, 57, 44,
+ //merge_subblock_idx
+ 5,
+ //merge_idx, merge_gpm_idx0, and merge_gpm_idx1
+ 20,
+ //abs_mvd_greater0_flag
+ 44,
+ //abs_mvd_greater1_flag
+ 43,
+ //tu_y_coded_flag
+ 23, 5, 20, 7,
+ //tu_cb_coded_flag
+ 25, 28,
+ //tu_cr_coded_flag
+ 25, 29, 45,
+ //cu_qp_delta_abs
+ CNU, CNU,
+ //cu_chroma_qp_offset_flag
+ CNU,
+ //cu_chroma_qp_offset_idx
+ CNU,
+ //transform_skip_flag
+ 25, 9,
+ //tu_joint_cbcr_residual_flag
+ 27, 36, 45,
+ //last_sig_coeff_x_prefix
+ 6, 13, 12, 6, 6, 12, 14, 14, 13, 12, 29, 7, 6, 13, 36, 28,
+ 14, 13, 5, 26, 12, 4, 18,
+ //last_sig_coeff_y_prefix
+ 5, 5, 12, 6, 6, 4, 6, 14, 5, 12, 14, 7, 13, 5, 13, 21,
+ 14, 20, 12, 34, 11, 4, 18,
+ //sb_coded_flag
+ 25, 30, 25, 45, 18, 12, 29,
+ //sig_coeff_flag
+ 17, 41, 42, 29, 25, 49, 43, 37, 33, 58, 51, 30, 19, 38, 38, 46,
+ 34, 54, 54, 39, 6, 39, 39, 39, 19, 39, 54, 39, 19, 39, 39, 39,
+ 56, 39, 39, 39, 17, 34, 35, 21, 41, 59, 60, 38, 35, 45, 53, 54,
+ 44, 39, 39, 39, 34, 38, 62, 39, 26, 39, 39, 39, 40, 35, 44,
+ //par_level_flag
+ 18, 17, 33, 18, 26, 42, 25, 33, 26, 42, 27, 25, 34, 42, 42, 35,
+ 26, 27, 42, 20, 20, 25, 25, 26, 11, 19, 27, 33, 42, 35, 35, 43,
+ 3,
+ //abs_level_gtx_flag
+ 0, 17, 26, 19, 35, 21, 25, 34, 20, 28, 29, 33, 27, 28, 29, 22,
+ 34, 28, 44, 37, 38, 0, 25, 19, 20, 13, 14, 57, 44, 30, 30, 23,
+ 17, 0, 1, 17, 25, 18, 0, 9, 25, 33, 34, 9, 25, 18, 26, 20,
+ 25, 18, 19, 27, 29, 17, 9, 25, 10, 18, 4, 17, 33, 19, 20, 29,
+ 18, 11, 4, 28, 2, 10, 3, 3,
+ //coeff_sign_flag
+ 5, 10, 53, 43, 25, 46,
+ },
+ {
+ //alf_ctb_flag
+ 33, 52, 46, 25, 61, 54, 25, 61, 54,
+ //alf_use_aps_flag
+ 46,
+ //alf_ctb_cc_cb_idc
+ 25, 35, 38,
+ //alf_ctb_cc_cr_idc
+ 25, 28, 38,
+ //alf_ctb_filter_alt_idx
+ 11, 26,
+ //sao_merge_left_flag and sao_merge_up_flag
+ 2,
+ //sao_type_idx_luma and sao_type_idx_chroma
+ 2,
+ //split_cu_flag
+ 18, 27, 15, 18, 28, 45, 26, 7, 23,
+ //split_qt_flag
+ 26, 36, 38, 18, 34, 21,
+ //mtt_split_cu_vertical_flag
+ 43, 42, 37, 42, 44,
+ //mtt_split_cu_binary_flag
+ 28, 29, 28, 29,
+ //non_inter_flag
+ 25, 20,
+ //cu_skip_flag
+ 57, 60, 46,
+ //pred_mode_ibc_flag
+ 0, 43, 45,
+ //pred_mode_flag
+ 40, 35,
+ //pred_mode_plt_flag
+ 17,
+ //cu_act_enabled_flag
+ 46,
+ //intra_bdpcm_luma_flag
+ 19,
+ //intra_bdpcm_luma_dir_flag
+ 21,
+ //intra_mip_flag
+ 56, 57, 50, 26,
+ //intra_luma_ref_idx
+ 25, 59,
+ //intra_subpartitions_mode_flag
+ 33,
+ //intra_subpartitions_split_flag
+ 43,
+ //intra_luma_mpm_flag
+ 44,
+ //intra_luma_not_planar_flag
+ 13, 6,
+ //intra_bdpcm_chroma_flag
+ 0,
+ //intra_bdpcm_chroma_dir_flag
+ 28,
+ //cclm_mode_flag
+ 26,
+ //cclm_mode_idx
+ 27,
+ //intra_chroma_pred_mode
+ 25,
+ //general_merge_flag
+ 6,
+ //inter_pred_idc
+ 14, 13, 5, 4, 3, 40,
+ //inter_affine_flag
+ 19, 13, 6,
+ //cu_affine_type_flag
+ 35,
+ //sym_mvd_flag
+ 28,
+ //ref_idx_l0 and ref_idx_l1
+ 5, 35,
+ //mvp_l0_flag and mvp_l1_flag
+ 34,
+ //amvr_flag
+ 59, 50,
+ //amvr_precision_idx
+ 38, 26, 60,
+ //bcw_idx
+ 5,
+ //cu_coded_flag
+ 12,
+ //cu_sbt_flag
+ 41, 57,
+ //cu_sbt_quad_flag
+ 42,
+ //cu_sbt_horizontal_flag
+ 35, 51, 27,
+ //cu_sbt_pos_flag
+ 28,
+ //lfnst_idx
+ 52, 37, 27,
+ //mts_idx
+ 45, 25, 27, 0,
+ //copy_above_palette_indices_flag
+ 50,
+ //palette_transpose_flag
+ 35,
+ //run_copy_flag
+ 58, 45, 45, 30, 38, 45, 38, 46,
+ //regular_merge_flag
+ 46, 15,
+ //mmvd_merge_flag
+ 25,
+ //mmvd_cand_flag
+ 43,
+ //mmvd_distance_idx
+ 59,
+ //ciip_flag
+ 57,
+ //merge_subblock_flag
+ 25, 58, 45,
+ //merge_subblock_idx
+ 4,
+ //merge_idx, merge_gpm_idx0, and merge_gpm_idx1
+ 18,
+ //abs_mvd_greater0_flag
+ 51,
+ //abs_mvd_greater1_flag
+ 36,
+ //tu_y_coded_flag
+ 15, 6, 5, 14,
+ //tu_cb_coded_flag
+ 25, 37,
+ //tu_cr_coded_flag
+ 9, 36, 45,
+ //cu_qp_delta_abs
+ CNU, CNU,
+ //cu_chroma_qp_offset_flag
+ CNU,
+ //cu_chroma_qp_offset_idx
+ CNU,
+ //transform_skip_flag
+ 25, 17,
+ //tu_joint_cbcr_residual_flag
+ 42, 43, 52,
+ //last_sig_coeff_x_prefix
+ 6, 6, 12, 14, 6, 4, 14, 7, 6, 4, 29, 7, 6, 6, 12, 28,
+ 7, 13, 13, 35, 19, 5, 4,
+ //last_sig_coeff_y_prefix
+ 5, 5, 20, 13, 13, 19, 21, 6, 12, 12, 14, 14, 5, 4, 12, 13,
+ 7, 13, 12, 41, 11, 5, 27,
+ //sb_coded_flag
+ 25, 45, 25, 14, 18, 35, 45,
+ //sig_coeff_flag
+ 17, 41, 49, 36, 1, 49, 50, 37, 48, 51, 58, 45, 26, 45, 53, 46,
+ 49, 54, 61, 39, 35, 39, 39, 39, 19, 54, 39, 39, 50, 39, 39, 39,
+ 0, 39, 39, 39, 9, 49, 50, 36, 48, 59, 59, 38, 34, 45, 38, 31,
+ 58, 39, 39, 39, 34, 38, 54, 39, 41, 39, 39, 39, 25, 50, 37,
+ //par_level_flag
+ 33, 40, 25, 41, 26, 42, 25, 33, 26, 34, 27, 25, 41, 42, 42, 35,
+ 33, 27, 35, 42, 43, 33, 25, 26, 34, 19, 27, 33, 42, 43, 35, 43,
+ 11,
+ //abs_level_gtx_flag
+ 0, 0, 33, 34, 35, 21, 25, 34, 35, 28, 29, 40, 42, 43, 29, 30,
+ 49, 36, 37, 45, 38, 0, 40, 34, 43, 36, 37, 57, 52, 45, 38, 46,
+ 25, 0, 0, 17, 25, 26, 0, 9, 25, 33, 19, 0, 25, 33, 26, 20,
+ 25, 33, 27, 35, 22, 25, 1, 25, 33, 26, 12, 25, 33, 27, 28, 37,
+ 19, 11, 4, 6, 3, 4, 4, 5,
+ //coeff_sign_flag
+ 35, 25, 46, 28, 33, 38,
+ },
+ //shiftIdx
+ {
+ //alf_ctb_flag
+ 0, 0, 0, 4, 0, 0, 1, 0, 0,
+ //alf_use_aps_flag
+ 0,
+ //alf_ctb_cc_cb_idc
+ 4, 1, 4,
+ //alf_ctb_cc_cr_idc
+ 4, 1, 4,
+ //alf_ctb_filter_alt_idx
+ 0, 0,
+ //sao_merge_left_flag and sao_merge_up_flag
+ 0,
+ //sao_type_idx_luma and sao_type_idx_chroma
+ 4,
+ //split_cu_flag
+ 12, 13, 8, 8, 13, 12, 5, 9, 9,
+ //split_qt_flag
+ 0, 8, 8, 12, 12, 8,
+ //mtt_split_cu_vertical_flag
+ 9, 8, 9, 8, 5,
+ //mtt_split_cu_binary_flag
+ 12, 13, 12, 13,
+ //non_inter_flag
+ 1, 0,
+ //cu_skip_flag
+ 5, 4, 8,
+ //pred_mode_ibc_flag
+ 1, 5, 8,
+ //pred_mode_flag
+ 5, 1,
+ //pred_mode_plt_flag
+ 1,
+ //cu_act_enabled_flag
+ 1,
+ //intra_bdpcm_luma_flag
+ 1,
+ //intra_bdpcm_luma_dir_flag
+ 4,
+ //intra_mip_flag
+ 9, 10, 9, 6,
+ //intra_luma_ref_idx
+ 5, 8,
+ //intra_subpartitions_mode_flag
+ 9,
+ //intra_subpartitions_split_flag
+ 2,
+ //intra_luma_mpm_flag
+ 6,
+ //intra_luma_not_planar_flag
+ 1, 5,
+ //intra_bdpcm_chroma_flag
+ 1,
+ //intra_bdpcm_chroma_dir_flag
+ 0,
+ //cclm_mode_flag
+ 4,
+ //cclm_mode_idx
+ 9,
+ //intra_chroma_pred_mode
+ 5,
+ //general_merge_flag
+ 4,
+ //inter_pred_idc
+ 0, 0, 1, 4, 4, 0,
+ //inter_affine_flag
+ 4, 0, 0,
+ //cu_affine_type_flag
+ 4,
+ //sym_mvd_flag
+ 5,
+ //ref_idx_l0 and ref_idx_l1
+ 0, 4,
+ //mvp_l0_flag and mvp_l1_flag
+ 12,
+ //amvr_flag
+ 0, 0,
+ //amvr_precision_idx
+ 4, 5, 0,
+ //bcw_idx
+ 1,
+ //cu_coded_flag
+ 4,
+ //cu_sbt_flag
+ 1, 5,
+ //cu_sbt_quad_flag
+ 10,
+ //cu_sbt_horizontal_flag
+ 8, 4, 1,
+ //cu_sbt_pos_flag
+ 13,
+ //lfnst_idx
+ 9, 9, 10,
+ //mts_idx
+ 8, 0, 9, 0,
+ //copy_above_palette_indices_flag
+ 9,
+ //palette_transpose_flag
+ 5,
+ //run_copy_flag
+ 9, 6, 9, 10, 5, 0, 9, 5,
+ //regular_merge_flag
+ 5, 5,
+ //mmvd_merge_flag
+ 4,
+ //mmvd_cand_flag
+ 10,
+ //mmvd_distance_idx
+ 0,
+ //ciip_flag
+ 1,
+ //merge_subblock_flag
+ 4, 4, 4,
+ //merge_subblock_idx
+ 0,
+ //merge_idx, merge_gpm_idx0, and merge_gpm_idx1
+ 4,
+ //abs_mvd_greater0_flag
+ 9,
+ //abs_mvd_greater1_flag
+ 5,
+ //tu_y_coded_flag
+ 5, 1, 8, 9,
+ //tu_cb_coded_flag
+ 5, 0,
+ //tu_cr_coded_flag
+ 2, 1, 0,
+ //cu_qp_delta_abs
+ 8, 8,
+ //cu_chroma_qp_offset_flag
+ 8,
+ //cu_chroma_qp_offset_idx
+ 8,
+ //transform_skip_flag
+ 1, 1,
+ //tu_joint_cbcr_residual_flag
+ 1, 1, 0,
+ //last_sig_coeff_x_prefix
+ 8, 5, 4, 5, 4, 4, 5, 4, 1, 0, 4, 1, 0, 0, 0, 0,
+ 1, 0, 0, 0, 5, 4, 4,
+ //last_sig_coeff_y_prefix
+ 8, 5, 8, 5, 5, 4, 5, 5, 4, 0, 5, 4, 1, 0, 0, 1,
+ 4, 0, 0, 0, 6, 5, 5,
+ //sb_coded_flag
+ 8, 5, 5, 8, 5, 8, 8,
+ //sig_coeff_flag
+ 12, 9, 9, 10, 9, 9, 9, 10, 8, 8, 8, 10, 9, 13, 8, 8,
+ 8, 8, 8, 5, 8, 0, 0, 0, 8, 8, 8, 8, 8, 0, 4, 4,
+ 0, 0, 0, 0, 12, 12, 9, 13, 4, 5, 8, 9, 8, 12, 12, 8,
+ 4, 0, 0, 0, 8, 8, 8, 8, 4, 0, 0, 0, 13, 13, 8,
+ //par_level_flag
+ 8, 9, 12, 13, 13, 13, 10, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+ 10, 13, 13, 13, 13, 8, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13,
+ 6,
+ //abs_level_gtx_flag
+ 9, 5, 10, 13, 13, 10, 9, 10, 13, 13, 13, 9, 10, 10, 10, 13,
+ 8, 9, 10, 10, 13, 8, 8, 9, 12, 12, 10, 5, 9, 9, 9, 13,
+ 1, 5, 9, 9, 9, 6, 5, 9, 10, 10, 9, 9, 9, 9, 9, 9,
+ 6, 8, 9, 9, 10, 1, 5, 8, 8, 9, 6, 6, 9, 8, 8, 9,
+ 4, 2, 1, 6, 1, 1, 1, 1,
+ //coeff_sign_flag
+ 1, 4, 4, 5, 8, 8,
+ }
+};
+
+#define MAX_SUB_BLOCKS 16
+#define MAX_SUB_BLOCK_SIZE 4
+#define MAX_TB_SIZE 64
+
+typedef struct ResidualCoding {
+ //common for ts and non ts
+ TransformBlock *tb;
+
+ int log2_sb_w;
+ int log2_sb_h;
+ int last_sub_block;
+ int hist_value;
+ int update_hist;
+ int num_sb_coeff;
+ int rem_bins_pass1;
+
+ int width_in_sbs;
+ int height_in_sbs;
+ int nb_sbs;
+
+ const uint8_t *sb_scan_x_off;
+ const uint8_t *sb_scan_y_off;
+ const uint8_t *scan_x_off;
+ const uint8_t *scan_y_off;
+
+ uint8_t sb_coded_flag[MAX_SUB_BLOCKS * MAX_SUB_BLOCKS];
+ int sig_coeff_flag[MAX_TB_SIZE * MAX_TB_SIZE];
+ int abs_level_pass1[MAX_TB_SIZE * MAX_TB_SIZE]; ///< AbsLevelPass1[][]
+ int abs_level[MAX_TB_SIZE * MAX_TB_SIZE];
+
+ //for ts only
+ uint8_t infer_sb_cbf;
+ int coeff_sign_level[MAX_TB_SIZE * MAX_TB_SIZE]; ///< CoeffSignLevel[][]
+
+ //for non ts only
+ int qstate;
+ int last_scan_pos;
+ int last_significant_coeff_x;
+ int last_significant_coeff_y;
+} ResidualCoding;
+
+static int cabac_reinit(VVCLocalContext *lc)
+{
+ return skip_bytes(&lc->ep->cc, 0) == NULL ? AVERROR_INVALIDDATA : 0;
+}
+
+static void cabac_init_state(VVCLocalContext *lc)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const int qp = av_clip_uintp2(lc->sc->sh.slice_qp_y, 6);
+ int init_type = 2 - rsh->sh_slice_type;
+
+ av_assert0(VVC_CONTEXTS == SYNTAX_ELEMENT_LAST);
+
+ ff_vvc_ep_init_stat_coeff(lc->ep, sps->bit_depth, sps->r->sps_persistent_rice_adaptation_enabled_flag);
+
+ if (rsh->sh_cabac_init_flag && !IS_I(rsh))
+ init_type ^= 3;
+
+ for (int i = 0; i < VVC_CONTEXTS; i++) {
+ VVCCabacState *state = &lc->ep->cabac_state[i];
+ const int init_value = init_values[init_type][i];
+ const int shift_idx = init_values[3][i];
+ const int m = (init_value >> 3) - 4;
+ const int n = ((init_value & 7) * 18) + 1;
+ const int pre = av_clip(((m * (qp - 16)) >> 1) + n, 1, 127);
+
+ state->state[0] = pre << 3;
+ state->state[1] = pre << 7;
+ state->shift[0] = (shift_idx >> 2 ) + 2;
+ state->shift[1] = (shift_idx & 3 ) + 3 + state->shift[0];
+ }
+}
+
+int ff_vvc_cabac_init(VVCLocalContext *lc,
+ const int ctu_idx, const int rx, const int ry)
+{
+ int ret = 0;
+ const VVCPPS *pps = lc->fc->ps.pps;
+ const int first_ctb_in_slice = !ctu_idx;
+ const int first_ctb_in_tile = rx == pps->ctb_to_col_bd[rx] && ry == pps->ctb_to_row_bd[ry];
+
+ if (first_ctb_in_slice|| first_ctb_in_tile) {
+ if (lc->sc->nb_eps == 1 && !first_ctb_in_slice)
+ ret = cabac_reinit(lc);
+ if (!ret)
+ cabac_init_state(lc);
+ }
+ return ret;
+}
+
+//fixme
+static void vvc_refill2(CABACContext* c) {
+ int i;
+ unsigned x;
+#if !HAVE_FAST_CLZ
+ x = c->low ^ (c->low - 1);
+ i = 7 - ff_h264_norm_shift[x >> (CABAC_BITS - 1)];
+#else
+ i = ff_ctz(c->low) - CABAC_BITS;
+#endif
+
+ x = -CABAC_MASK;
+
+#if CABAC_BITS == 16
+ x += (c->bytestream[0] << 9) + (c->bytestream[1] << 1);
+#else
+ x += c->bytestream[0] << 1;
+#endif
+
+ c->low += x << i;
+#if !UNCHECKED_BITSTREAM_READER
+ if (c->bytestream < c->bytestream_end)
+#endif
+ c->bytestream += CABAC_BITS / 8;
+}
+
+static int inline vvc_get_cabac(CABACContext *c, VVCCabacState* base, const int ctx)
+{
+ VVCCabacState *s = base + ctx;
+ const int qRangeIdx = c->range >> 5;
+ const int pState = s->state[1] + (s->state[0] << 4);
+ const int valMps = pState >> 14;
+ const int RangeLPS = (qRangeIdx * ((valMps ? 32767 - pState : pState) >> 9 ) >> 1) + 4;
+ int bit, lps_mask;
+
+ c->range -= RangeLPS;
+ lps_mask = ((c->range<<(CABAC_BITS+1)) - c->low)>>31;
+
+ c->low -= (c->range<<(CABAC_BITS+1)) & lps_mask;
+ c->range += (RangeLPS - c->range) & lps_mask;
+
+ bit = valMps ^ (lps_mask & 1);
+
+ lps_mask = ff_h264_norm_shift[c->range];
+ c->range <<= lps_mask;
+ c->low <<= lps_mask;
+
+ if (!(c->low & CABAC_MASK))
+ vvc_refill2(c);
+ s->state[0] = s->state[0] - (s->state[0] >> s->shift[0]) + (1023 * bit >> s->shift[0]);
+ s->state[1] = s->state[1] - (s->state[1] >> s->shift[1]) + (16383 * bit >> s->shift[1]);
+ return bit;
+}
+
+#define GET_CABAC(ctx) vvc_get_cabac(&lc->ep->cc, lc->ep->cabac_state, ctx)
+
+//9.3.3.4 Truncated binary (TB) binarization process
+static int truncated_binary_decode(VVCLocalContext *lc, const int c_max)
+{
+ const int n = c_max + 1;
+ const int k = av_log2(n);
+ const int u = (1 << (k+1)) - n;
+ int v = 0;
+ for (int i = 0; i < k; i++)
+ v = (v << 1) | get_cabac_bypass(&lc->ep->cc);
+ if (v >= u) {
+ v = (v << 1) | get_cabac_bypass(&lc->ep->cc);
+ v -= u;
+ }
+ return v;
+}
+
+// 9.3.3.6 Limited k-th order Exp-Golomb binarization process
+static int limited_kth_order_egk_decode(CABACContext *c, const int k, const int max_pre_ext_len, const int trunc_suffix_len)
+{
+ int pre_ext_len = 0;
+ int escape_length;
+ int val = 0;
+ while ((pre_ext_len < max_pre_ext_len) && get_cabac_bypass(c))
+ pre_ext_len++;
+ if (pre_ext_len == max_pre_ext_len)
+ escape_length = trunc_suffix_len;
+ else
+ escape_length = pre_ext_len + k;
+ while (escape_length-- > 0) {
+ val = (val << 1) + get_cabac_bypass(c);
+ }
+ val += ((1 << pre_ext_len) - 1) << k;
+ return val;
+}
+
+static av_always_inline
+void get_left_top(const VVCLocalContext *lc, uint8_t *left, uint8_t *top,
+ const int x0, const int y0, const uint8_t *left_ctx, const uint8_t *top_ctx)
+{
+ const VVCFrameContext *fc = lc->fc;
+ const VVCSPS *sps = fc->ps.sps;
+ const int min_cb_width = fc->ps.pps->min_cb_width;
+ const int x0b = av_mod_uintp2(x0, sps->ctb_log2_size_y);
+ const int y0b = av_mod_uintp2(y0, sps->ctb_log2_size_y);
+ const int x_cb = x0 >> sps->min_cb_log2_size_y;
+ const int y_cb = y0 >> sps->min_cb_log2_size_y;
+
+ if (lc->ctb_left_flag || x0b)
+ *left = SAMPLE_CTB(left_ctx, x_cb - 1, y_cb);
+ if (lc->ctb_up_flag || y0b)
+ *top = SAMPLE_CTB(top_ctx, x_cb, y_cb - 1);
+}
+
+static av_always_inline
+uint8_t get_inc(VVCLocalContext *lc, const uint8_t *ctx)
+{
+ uint8_t left = 0, top = 0;
+ get_left_top(lc, &left, &top, lc->cu->x0, lc->cu->y0, ctx, ctx);
+ return left + top;
+}
+
+int ff_vvc_sao_merge_flag_decode(VVCLocalContext *lc)
+{
+ return GET_CABAC(SAO_MERGE_FLAG);
+}
+
+int ff_vvc_sao_type_idx_decode(VVCLocalContext *lc)
+{
+ if (!GET_CABAC(SAO_TYPE_IDX))
+ return SAO_NOT_APPLIED;
+
+ if (!get_cabac_bypass(&lc->ep->cc))
+ return SAO_BAND;
+ return SAO_EDGE;
+}
+
+int ff_vvc_sao_band_position_decode(VVCLocalContext *lc)
+{
+ int value = get_cabac_bypass(&lc->ep->cc);
+
+ for (int i = 0; i < 4; i++)
+ value = (value << 1) | get_cabac_bypass(&lc->ep->cc);
+ return value;
+}
+
+int ff_vvc_sao_offset_abs_decode(VVCLocalContext *lc)
+{
+ int i = 0;
+ const int length = (1 << (FFMIN(lc->fc->ps.sps->bit_depth, 10) - 5)) - 1;
+
+ while (i < length && get_cabac_bypass(&lc->ep->cc))
+ i++;
+ return i;
+}
+
+int ff_vvc_sao_offset_sign_decode(VVCLocalContext *lc)
+{
+ return get_cabac_bypass(&lc->ep->cc);
+}
+
+int ff_vvc_sao_eo_class_decode(VVCLocalContext *lc)
+{
+ int ret = get_cabac_bypass(&lc->ep->cc) << 1;
+ ret |= get_cabac_bypass(&lc->ep->cc);
+ return ret;
+}
+
+int ff_vvc_alf_ctb_flag(VVCLocalContext *lc, const int rx, const int ry, const int c_idx)
+{
+ int inc = c_idx * 3;
+ const VVCFrameContext *fc = lc->fc;
+ if (lc->ctb_left_flag) {
+ const ALFParams *left = &CTB(fc->tab.alf, rx - 1, ry);
+ inc += left->ctb_flag[c_idx];
+ }
+ if (lc->ctb_up_flag) {
+ const ALFParams *above = &CTB(fc->tab.alf, rx, ry - 1);
+ inc += above->ctb_flag[c_idx];
+ }
+ return GET_CABAC(ALF_CTB_FLAG + inc);
+}
+
+int ff_vvc_alf_use_aps_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(ALF_USE_APS_FLAG);
+}
+
+int ff_vvc_alf_luma_prev_filter_idx(VVCLocalContext *lc)
+{
+ return truncated_binary_decode(lc, lc->sc->sh.r->sh_num_alf_aps_ids_luma - 1);
+}
+
+int ff_vvc_alf_luma_fixed_filter_idx(VVCLocalContext *lc)
+{
+ return truncated_binary_decode(lc, 15);
+}
+
+int ff_vvc_alf_ctb_filter_alt_idx(VVCLocalContext *lc, const int c_idx, const int num_chroma_filters)
+{
+ int i = 0;
+ const int length = num_chroma_filters - 1;
+
+ while (i < length && GET_CABAC(ALF_CTB_FILTER_ALT_IDX + c_idx - 1))
+ i++;
+ return i;
+}
+
+int ff_vvc_alf_ctb_cc_idc(VVCLocalContext *lc, const int rx, const int ry, const int idx, const int cc_filters_signalled)
+{
+ int inc = !idx ? ALF_CTB_CC_CB_IDC : ALF_CTB_CC_CR_IDC;
+ int i = 0;
+ const VVCFrameContext *fc = lc->fc;
+ if (lc->ctb_left_flag) {
+ const ALFParams *left = &CTB(fc->tab.alf, rx - 1, ry);
+ inc += left->ctb_cc_idc[idx] != 0;
+ }
+ if (lc->ctb_up_flag) {
+ const ALFParams *above = &CTB(fc->tab.alf, rx, ry - 1);
+ inc += above->ctb_cc_idc[idx] != 0;
+ }
+
+ if (!GET_CABAC(inc))
+ return 0;
+ i++;
+ while (i < cc_filters_signalled && get_cabac_bypass(&lc->ep->cc))
+ i++;
+ return i;
+}
+
+int ff_vvc_split_cu_flag(VVCLocalContext *lc, const int x0, const int y0,
+ const int cb_width, const int cb_height, const int is_chroma, const VVCAllowedSplit *a)
+{
+ const VVCFrameContext *fc = lc->fc;
+ const VVCPPS *pps = fc->ps.pps;
+ const int is_inside = (x0 + cb_width <= pps->width) && (y0 + cb_height <= pps->height);
+
+ if ((a->btv || a->bth || a->ttv || a->tth || a->qt) && is_inside)
+ {
+ uint8_t inc = 0, left_height = cb_height, top_width = cb_width;
+
+ get_left_top(lc, &left_height, &top_width, x0, y0, fc->tab.cb_height[is_chroma], fc->tab.cb_width[is_chroma]);
+ inc += left_height < cb_height;
+ inc += top_width < cb_width;
+ inc += (a->btv + a->bth + a->ttv + a->tth + 2 * a->qt - 1) / 2 * 3;
+
+ return GET_CABAC(SPLIT_CU_FLAG + inc);
+
+ }
+ return !is_inside;
+}
+
+static int split_qt_flag_decode(VVCLocalContext *lc, const int x0, const int y0, const int ch_type, const int cqt_depth)
+{
+ const VVCFrameContext *fc = lc->fc;
+ int inc = 0;
+ uint8_t depth_left = 0, depth_top = 0;
+
+ get_left_top(lc, &depth_left, &depth_top, x0, y0, fc->tab.cqt_depth[ch_type], fc->tab.cqt_depth[ch_type]);
+ inc += depth_left > cqt_depth;
+ inc += depth_top > cqt_depth;
+ inc += (cqt_depth >= 2) * 3;
+
+ return GET_CABAC(SPLIT_QT_FLAG + inc);
+}
+
+static int mtt_split_cu_vertical_flag_decode(VVCLocalContext *lc, const int x0, const int y0,
+ const int cb_width, const int cb_height, const int ch_type, const VVCAllowedSplit* a)
+{
+ if ((a->bth || a->tth) && (a->btv || a->ttv)) {
+ int inc;
+ const int v = a->btv + a->ttv;
+ const int h = a->bth + a->tth;
+ if (v > h)
+ inc = 4;
+ else if (v < h)
+ inc = 3;
+ else {
+ const VVCFrameContext *fc = lc->fc;
+ const VVCSPS *sps = fc->ps.sps;
+ const int min_cb_width = fc->ps.pps->min_cb_width;
+ const int x0b = av_mod_uintp2(x0, sps->ctb_log2_size_y);
+ const int y0b = av_mod_uintp2(y0, sps->ctb_log2_size_y);
+ const int x_cb = x0 >> sps->min_cb_log2_size_y;
+ const int y_cb = y0 >> sps->min_cb_log2_size_y;
+ const int available_a = lc->ctb_up_flag || y0b;
+ const int available_l = lc->ctb_left_flag || x0b;
+ const int da = cb_width / (available_a ? SAMPLE_CTB(fc->tab.cb_width[ch_type], x_cb, y_cb - 1) : 1);
+ const int dl = cb_height / (available_l ? SAMPLE_CTB(fc->tab.cb_height[ch_type], x_cb - 1, y_cb) : 1);
+
+ if (da == dl || !available_a || !available_l)
+ inc = 0;
+ else if (da < dl)
+ inc = 1;
+ else
+ inc = 2;
+ }
+ return GET_CABAC(MTT_SPLIT_CU_VERTICAL_FLAG + inc);
+ }
+ return !(a->bth || a->tth);
+}
+
+static int mtt_split_cu_binary_flag_decode(VVCLocalContext *lc, const int mtt_split_cu_vertical_flag, const int mtt_depth)
+{
+ const int inc = (2 * mtt_split_cu_vertical_flag) + ((mtt_depth <= 1) ? 1 : 0);
+ return GET_CABAC(MTT_SPLIT_CU_BINARY_FLAG + inc);
+}
+
+VVCSplitMode ff_vvc_split_mode(VVCLocalContext *lc, const int x0, const int y0, const int cb_width, const int cb_height,
+ const int cqt_depth, const int mtt_depth, const int ch_type, const VVCAllowedSplit *a)
+{
+ const int allow_no_qt = a->btv || a->bth || a->ttv || a->tth;
+ int split_qt_flag;
+ int mtt_split_cu_vertical_flag;
+ int mtt_split_cu_binary_flag;
+ const VVCSplitMode mtt_split_modes[] = {
+ SPLIT_TT_HOR, SPLIT_BT_HOR, SPLIT_TT_VER, SPLIT_BT_VER,
+ };
+ if (allow_no_qt && a->qt) {
+ split_qt_flag = split_qt_flag_decode(lc, x0, y0, ch_type, cqt_depth);
+ } else {
+ split_qt_flag = !allow_no_qt || a->qt;
+ }
+ if (split_qt_flag)
+ return SPLIT_QT;
+ mtt_split_cu_vertical_flag = mtt_split_cu_vertical_flag_decode(lc, x0, y0, cb_width, cb_height, ch_type, a);
+ if ((a->btv && a->ttv && mtt_split_cu_vertical_flag) ||
+ (a->bth && a->tth && !mtt_split_cu_vertical_flag)) {
+ mtt_split_cu_binary_flag = mtt_split_cu_binary_flag_decode(lc, mtt_split_cu_vertical_flag, mtt_depth);
+ } else {
+ if (!a->btv && !a->bth)
+ mtt_split_cu_binary_flag = 0;
+ else if (!a->ttv && !a->tth)
+ mtt_split_cu_binary_flag = 1;
+ else if (a->bth && a->ttv)
+ mtt_split_cu_binary_flag = 1 - mtt_split_cu_vertical_flag;
+ else
+ mtt_split_cu_binary_flag = mtt_split_cu_vertical_flag;
+ }
+ return mtt_split_modes[(mtt_split_cu_vertical_flag << 1) + mtt_split_cu_binary_flag];
+}
+
+int ff_vvc_non_inter_flag(VVCLocalContext *lc, const int x0, const int y0, const int ch_type)
+{
+ const VVCFrameContext *fc = lc->fc;
+ uint8_t inc, left = MODE_INTER, top = MODE_INTER;
+
+ get_left_top(lc, &left, &top, x0, y0, fc->tab.cpm[ch_type], fc->tab.cpm[ch_type]);
+ inc = left == MODE_INTRA || top == MODE_INTRA;
+ return GET_CABAC(NON_INTER_FLAG + inc);
+}
+
+int ff_vvc_pred_mode_flag(VVCLocalContext *lc, const int is_chroma)
+{
+ const VVCFrameContext *fc = lc->fc;
+ const CodingUnit *cu = lc->cu;
+ uint8_t inc, left = MODE_INTER, top = MODE_INTER;
+
+ get_left_top(lc, &left, &top, cu->x0, cu->y0, fc->tab.cpm[is_chroma], fc->tab.cpm[is_chroma]);
+ inc = left == MODE_INTRA || top == MODE_INTRA;
+ return GET_CABAC(PRED_MODE_FLAG + inc);
+}
+
+int ff_vvc_pred_mode_plt_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(PRED_MODE_PLT_FLAG);
+}
+
+int ff_vvc_intra_bdpcm_luma_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(INTRA_BDPCM_LUMA_FLAG);
+}
+
+int ff_vvc_intra_bdpcm_luma_dir_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(INTRA_BDPCM_LUMA_DIR_FLAG);
+}
+
+int ff_vvc_intra_bdpcm_chroma_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(INTRA_BDPCM_CHROMA_FLAG);
+}
+
+int ff_vvc_intra_bdpcm_chroma_dir_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(INTRA_BDPCM_CHROMA_DIR_FLAG);
+}
+
+int ff_vvc_cu_skip_flag(VVCLocalContext *lc, const uint8_t *cu_skip_flag)
+{
+ const int inc = get_inc(lc, cu_skip_flag);
+ return GET_CABAC(CU_SKIP_FLAG + inc);
+}
+
+int ff_vvc_pred_mode_ibc_flag(VVCLocalContext *lc, const int is_chroma)
+{
+ const VVCFrameContext *fc = lc->fc;
+ const CodingUnit *cu = lc->cu;
+ uint8_t left_mode = MODE_INTER, top_mode = MODE_INTER;
+ int inc;
+
+ get_left_top(lc, &left_mode, &top_mode, cu->x0, cu->y0, fc->tab.cpm[is_chroma], fc->tab.cpm[is_chroma]);
+ inc = (left_mode == MODE_IBC) + (top_mode == MODE_IBC);
+ return GET_CABAC(PRED_MODE_IBC_FLAG + inc);
+}
+
+int ff_vvc_intra_mip_flag(VVCLocalContext *lc, const uint8_t *intra_mip_flag)
+{
+ const int w = lc->cu->cb_width;
+ const int h = lc->cu->cb_height;
+ const int inc = (w > h * 2 || h > w * 2) ? 3 : get_inc(lc, intra_mip_flag);
+ return GET_CABAC(INTRA_MIP_FLAG + inc);
+}
+
+int ff_vvc_intra_mip_transposed_flag(VVCLocalContext *lc)
+{
+ return get_cabac_bypass(&lc->ep->cc);
+}
+
+int ff_vvc_intra_mip_mode(VVCLocalContext *lc)
+{
+ const int w = lc->cu->cb_width;
+ const int h = lc->cu->cb_height;
+ const int c_max = (w == 4 && h == 4) ? 15 :
+ ((w == 4 || h == 4) || (w == 8 && h == 8)) ? 7: 5;
+ return truncated_binary_decode(lc, c_max);
+}
+
+int ff_vvc_intra_luma_ref_idx(VVCLocalContext *lc)
+{
+ int i;
+ for (i = 0; i < 2; i++) {
+ if (!GET_CABAC(INTRA_LUMA_REF_IDX + i))
+ return i;
+ }
+ return i;
+}
+
+int ff_vvc_intra_subpartitions_mode_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(INTRA_SUBPARTITIONS_MODE_FLAG);
+}
+
+enum IspType ff_vvc_isp_split_type(VVCLocalContext *lc, const int intra_subpartitions_mode_flag)
+{
+ if (!intra_subpartitions_mode_flag)
+ return ISP_NO_SPLIT;
+ return 1 + GET_CABAC(INTRA_SUBPARTITIONS_SPLIT_FLAG);
+}
+
+int ff_vvc_intra_luma_mpm_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(INTRA_LUMA_MPM_FLAG);
+}
+
+int ff_vvc_intra_luma_not_planar_flag(VVCLocalContext *lc, const int intra_subpartitions_mode_flag)
+{
+ return GET_CABAC(INTRA_LUMA_NOT_PLANAR_FLAG + !intra_subpartitions_mode_flag);
+}
+
+int ff_vvc_intra_luma_mpm_idx(VVCLocalContext *lc)
+{
+ int i;
+ for (i = 0; i < 4 && get_cabac_bypass(&lc->ep->cc); i++)
+ /* nothing */;
+ return i;
+}
+
+int ff_vvc_intra_luma_mpm_remainder(VVCLocalContext *lc)
+{
+ return truncated_binary_decode(lc, 60);
+}
+
+int ff_vvc_cclm_mode_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CCLM_MODE_FLAG);
+}
+
+int ff_vvc_cclm_mode_idx(VVCLocalContext *lc)
+{
+ if (!GET_CABAC(CCLM_MODE_IDX))
+ return 0;
+ return get_cabac_bypass(&lc->ep->cc) + 1;
+}
+
+int ff_vvc_intra_chroma_pred_mode(VVCLocalContext *lc)
+{
+ if (!GET_CABAC(INTRA_CHROMA_PRED_MODE))
+ return 4;
+ return (get_cabac_bypass(&lc->ep->cc) << 1) | get_cabac_bypass(&lc->ep->cc);
+}
+
+int ff_vvc_general_merge_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(GENERAL_MERGE_FLAG);
+}
+
+static int get_inter_flag_inc(VVCLocalContext *lc, const int x0, const int y0)
+{
+ uint8_t left_merge = 0, top_merge = 0;
+ uint8_t left_affine = 0, top_affine = 0;
+ const VVCFrameContext *fc = lc->fc;
+
+ get_left_top(lc, &left_merge, &top_merge, x0, y0, fc->tab.msf, fc->tab.msf);
+ get_left_top(lc, &left_affine, &top_affine, x0, y0, fc->tab.iaf, fc->tab.iaf);
+ return (left_merge || left_affine) + (top_merge + top_affine);
+}
+
+int ff_vvc_merge_subblock_flag(VVCLocalContext *lc)
+{
+ const int inc = get_inter_flag_inc(lc, lc->cu->x0, lc->cu->y0);
+ return GET_CABAC(MERGE_SUBBLOCK_FLAG + inc);
+}
+
+int ff_vvc_merge_subblock_idx(VVCLocalContext *lc, const int max_num_subblock_merge_cand)
+{
+ int i;
+ if (!GET_CABAC(MERGE_SUBBLOCK_IDX))
+ return 0;
+ for (i = 1; i < max_num_subblock_merge_cand - 1 && get_cabac_bypass(&lc->ep->cc); i++)
+ /* nothing */;
+ return i;
+}
+
+int ff_vvc_regular_merge_flag(VVCLocalContext *lc, const int cu_skip_flag)
+{
+ int inc = !cu_skip_flag;
+ return GET_CABAC(REGULAR_MERGE_FLAG + inc);
+}
+
+int ff_vvc_mmvd_merge_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(MMVD_MERGE_FLAG);
+}
+
+int ff_vvc_mmvd_cand_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(MMVD_CAND_FLAG);
+}
+
+static int mmvd_distance_idx_decode(VVCLocalContext *lc)
+{
+ int i;
+ if (!GET_CABAC(MMVD_DISTANCE_IDX))
+ return 0;
+ for (i = 1; i < 7 && get_cabac_bypass(&lc->ep->cc); i++)
+ /* nothing */;
+ return i;
+}
+
+static int mmvd_direction_idx_decode(VVCLocalContext *lc)
+{
+ return (get_cabac_bypass(&lc->ep->cc) << 1) | get_cabac_bypass(&lc->ep->cc);
+}
+
+void ff_vvc_mmvd_offset_coding(VVCLocalContext *lc, Mv *mmvd_offset, const int ph_mmvd_fullpel_only_flag)
+{
+ const int shift = ph_mmvd_fullpel_only_flag ? 4 : 2;
+ const int mmvd_distance = 1 << (mmvd_distance_idx_decode(lc) + shift);
+ const int mmvd_direction_idx = mmvd_direction_idx_decode(lc);
+ const int mmvd_signs[][2] = { {1, 0}, {-1, 0}, {0, 1}, {0, -1} };
+ mmvd_offset->x = mmvd_distance * mmvd_signs[mmvd_direction_idx][0];
+ mmvd_offset->y = mmvd_distance * mmvd_signs[mmvd_direction_idx][1];
+}
+
+static PredMode get_luma_pred_mode(VVCLocalContext *lc)
+{
+ const VVCFrameContext *fc = lc->fc;
+ const CodingUnit *cu = lc->cu;
+ PredMode pred_mode;
+
+ if (cu->tree_type != DUAL_TREE_CHROMA) {
+ pred_mode = cu->pred_mode;
+ } else {
+ const int x_cb = cu->x0 >> fc->ps.sps->min_cb_log2_size_y;
+ const int y_cb = cu->y0 >> fc->ps.sps->min_cb_log2_size_y;
+ const int min_cb_width = fc->ps.pps->min_cb_width;
+ pred_mode = SAMPLE_CTB(fc->tab.cpm[0], x_cb, y_cb);
+ }
+ return pred_mode;
+}
+
+int ff_vvc_merge_idx(VVCLocalContext *lc)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ const int is_ibc = get_luma_pred_mode(lc) == MODE_IBC;
+ const int c_max = (is_ibc ? sps->max_num_ibc_merge_cand : sps->max_num_merge_cand) - 1;
+ int i;
+
+ if (!GET_CABAC(MERGE_IDX))
+ return 0;
+
+ for (i = 1; i < c_max && get_cabac_bypass(&lc->ep->cc); i++)
+ /* nothing */;
+ return i;
+}
+
+int ff_vvc_merge_gpm_partition_idx(VVCLocalContext *lc)
+{
+ int i = 0;
+
+ for (int j = 0; j < 6; j++)
+ i = (i << 1) | get_cabac_bypass(&lc->ep->cc);
+
+ return i;
+}
+
+int ff_vvc_merge_gpm_idx(VVCLocalContext *lc, const int idx)
+{
+ const int c_max = lc->fc->ps.sps->max_num_gpm_merge_cand - idx - 1;
+ int i;
+
+ if (!GET_CABAC(MERGE_IDX))
+ return 0;
+
+ for (i = 1; i < c_max && get_cabac_bypass(&lc->ep->cc); i++)
+ /* nothing */;
+
+ return i;
+}
+
+int ff_vvc_ciip_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CIIP_FLAG);
+}
+
+PredFlag ff_vvc_pred_flag(VVCLocalContext *lc, const int is_b)
+{
+ const int w = lc->cu->cb_width;
+ const int h = lc->cu->cb_height;
+ if (!is_b)
+ return PF_L0;
+ if (w + h > 12) {
+ const int log2 = av_log2(w) + av_log2(h);
+ const int inc = 7 - ((1 + log2)>>1);
+ if (GET_CABAC(INTER_PRED_IDC + inc))
+ return PF_BI;
+ }
+ return PF_L0 + GET_CABAC(INTER_PRED_IDC + 5);
+}
+
+int ff_vvc_inter_affine_flag(VVCLocalContext *lc)
+{
+ const int inc = get_inter_flag_inc(lc, lc->cu->x0, lc->cu->y0);
+ return GET_CABAC(INTER_AFFINE_FLAG + inc);
+}
+
+int ff_vvc_cu_affine_type_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CU_AFFINE_TYPE_FLAG);
+}
+
+int ff_vvc_sym_mvd_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(SYM_MVD_FLAG);
+}
+
+int ff_vvc_ref_idx_lx(VVCLocalContext *lc, const uint8_t nb_refs)
+{
+ const int c_max = nb_refs - 1;
+ const int max_ctx = FFMIN(c_max, 2);
+ int i = 0;
+
+ while (i < max_ctx && GET_CABAC(REF_IDX_LX + i))
+ i++;
+ if (i == 2) {
+ while (i < c_max && get_cabac_bypass(&lc->ep->cc))
+ i++;
+ }
+ return i;
+}
+
+int ff_vvc_abs_mvd_greater0_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(ABS_MVD_GREATER0_FLAG);
+}
+
+int ff_vvc_abs_mvd_greater1_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(ABS_MVD_GREATER1_FLAG);
+}
+
+int ff_vvc_abs_mvd_minus2(VVCLocalContext *lc)
+{
+ return limited_kth_order_egk_decode(&lc->ep->cc, 1, 15, 17);
+}
+
+int ff_vvc_mvd_sign_flag(VVCLocalContext *lc)
+{
+ return get_cabac_bypass(&lc->ep->cc);
+}
+
+int ff_vvc_mvp_lx_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(MVP_LX_FLAG);
+}
+
+static int amvr_flag(VVCLocalContext *lc, const int inter_affine_flag)
+{
+ return GET_CABAC(AMVR_FLAG + inter_affine_flag);
+}
+
+static int amvr_precision_idx(VVCLocalContext *lc, const int inc, const int c_max)
+{
+ int i = 0;
+ if (!GET_CABAC(AMVR_PRECISION_IDX + inc))
+ return 0;
+ i++;
+ if (i < c_max && GET_CABAC(AMVR_PRECISION_IDX + 1))
+ i++;
+ return i;
+}
+
+int ff_vvc_amvr_shift(VVCLocalContext *lc, const int inter_affine_flag,
+ const PredMode pred_mode, const int has_amvr_flag)
+{
+ int amvr_shift = 2;
+ if (has_amvr_flag) {
+ if (pred_mode == MODE_IBC || amvr_flag(lc, inter_affine_flag)) {
+ int idx;
+ if (inter_affine_flag) {
+ idx = amvr_precision_idx(lc, 2, 1);
+ amvr_shift = idx * 4;
+ } else if (pred_mode == MODE_IBC) {
+ idx = amvr_precision_idx(lc, 1, 1);
+ amvr_shift = 4 + idx * 2;
+ } else {
+ static const int shifts[] = {3, 4, 6};
+ idx = amvr_precision_idx(lc, 0, 2);
+ amvr_shift = shifts[idx];
+ }
+ }
+ }
+ return amvr_shift;
+}
+
+int ff_vvc_bcw_idx(VVCLocalContext *lc, const int no_backward_pred_flag)
+{
+ const int c_max = no_backward_pred_flag ? 4 : 2;
+ int i = 1;
+ if (!GET_CABAC(BCW_IDX))
+ return 0;
+ while (i < c_max && get_cabac_bypass(&lc->ep->cc))
+ i++;
+ return i;
+}
+
+int ff_vvc_tu_cb_coded_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(TU_CB_CODED_FLAG + lc->cu->bdpcm_flag[1]);
+}
+
+int ff_vvc_tu_cr_coded_flag(VVCLocalContext *lc, int tu_cb_coded_flag)
+{
+ return GET_CABAC(TU_CR_CODED_FLAG + (lc->cu->bdpcm_flag[1] ? 2 : tu_cb_coded_flag));
+}
+
+int ff_vvc_tu_y_coded_flag(VVCLocalContext *lc)
+{
+ const CodingUnit *cu = lc->cu;
+ int inc;
+ if (cu->bdpcm_flag[0])
+ inc = 1;
+ else if (cu->isp_split_type == ISP_NO_SPLIT)
+ inc = 0;
+ else
+ inc = 2 + lc->parse.prev_tu_cbf_y;
+ lc->parse.prev_tu_cbf_y = GET_CABAC(TU_Y_CODED_FLAG + inc);
+ return lc->parse.prev_tu_cbf_y;
+}
+
+int ff_vvc_cu_qp_delta_abs(VVCLocalContext *lc)
+{
+ int v, i, k;
+ if (!GET_CABAC(CU_QP_DELTA_ABS))
+ return 0;
+
+ // prefixVal
+ for (v = 1; v < 5 && GET_CABAC(CU_QP_DELTA_ABS + 1); v++)
+ /* nothing */;
+ if (v < 5)
+ return v;
+
+ // 9.3.3.5 k-th order Exp-Golomb binarization process
+ // suffixVal
+
+ // CuQpDeltaVal shall in the range of −( 32 + QpBdOffset / 2 ) to +( 31 + QpBdOffset / 2 )
+ // so k = 6 should enough
+ for (k = 0; k < 6 && get_cabac_bypass(&lc->ep->cc); k++)
+ /* nothing */;
+ i = (1 << k) - 1;
+ v = 0;
+ while (k--)
+ v = (v << 1) + get_cabac_bypass(&lc->ep->cc);
+ v += i;
+
+ return v + 5;
+}
+
+int ff_vvc_cu_qp_delta_sign_flag(VVCLocalContext *lc)
+{
+ return get_cabac_bypass(&lc->ep->cc);
+}
+
+int ff_vvc_cu_chroma_qp_offset_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CU_CHROMA_QP_OFFSET_FLAG);
+}
+
+int ff_vvc_cu_chroma_qp_offset_idx(VVCLocalContext *lc)
+{
+ const int c_max = lc->fc->ps.pps->r->pps_chroma_qp_offset_list_len_minus1;
+ int i;
+ for (i = 0; i < c_max && GET_CABAC(CU_CHROMA_QP_OFFSET_IDX); i++)
+ /* nothing */;
+ return i;
+}
+
+static av_always_inline int last_significant_coeff_xy_prefix(VVCLocalContext *lc,
+ const int log2_tb_size, const int log2_zo_tb_size, const int c_idx, const int ctx)
+{
+ int i = 0;
+ int max = (log2_zo_tb_size << 1) - 1;
+ int ctx_offset, ctx_shift;
+ if (!log2_tb_size)
+ return 0;
+ if (!c_idx) {
+ const int offset_y[] = {0, 0, 3, 6, 10, 15};
+ ctx_offset = offset_y[log2_tb_size - 1];
+ ctx_shift = (log2_tb_size + 1) >> 2;
+ } else {
+ const int shifts[] = {0, 0, 0, 1, 2, 2, 2};
+ ctx_offset = 20;
+ ctx_shift = shifts[log2_tb_size];
+ }
+ while (i < max && GET_CABAC(ctx + (i >> ctx_shift) + ctx_offset))
+ i++;
+ return i;
+}
+
+static av_always_inline int last_significant_coeff_x_prefix_decode(VVCLocalContext *lc,
+ const int log2_tb_width, const int log2_zo_tb_width, const int c_idx)
+{
+ return last_significant_coeff_xy_prefix(lc, log2_tb_width, log2_zo_tb_width, c_idx, LAST_SIG_COEFF_X_PREFIX);
+}
+
+static av_always_inline int last_significant_coeff_y_prefix_decode(VVCLocalContext *lc,
+ const int log2_tb_height, const int log2_zo_tb_height, const int c_idx)
+{
+ return last_significant_coeff_xy_prefix(lc, log2_tb_height, log2_zo_tb_height, c_idx, LAST_SIG_COEFF_Y_PREFIX);
+}
+
+static av_always_inline int last_sig_coeff_suffix_decode(VVCLocalContext *lc,
+ const int last_significant_coeff_y_prefix)
+{
+ const int length = (last_significant_coeff_y_prefix >> 1) - 1;
+ int value = get_cabac_bypass(&lc->ep->cc);
+
+ for (int i = 1; i < length; i++)
+ value = (value << 1) | get_cabac_bypass(&lc->ep->cc);
+ return value;
+}
+
+int ff_vvc_tu_joint_cbcr_residual_flag(VVCLocalContext *lc, const int tu_cb_coded_flag, const int tu_cr_coded_flag)
+{
+ return GET_CABAC(TU_JOINT_CBCR_RESIDUAL_FLAG + 2 * tu_cb_coded_flag + tu_cr_coded_flag - 1);
+}
+
+int ff_vvc_transform_skip_flag(VVCLocalContext *lc, const int inc)
+{
+ return GET_CABAC(TRANSFORM_SKIP_FLAG + inc);
+}
+
+//9.3.4.2.7 Derivation process for the variables locNumSig, locSumAbsPass1
+static int get_local_sum(const int *level, const int w, const int h,
+ const int xc, const int yc, const int hist_value)
+{
+ int loc_sum = 3 * hist_value;
+ level += w * yc + xc;
+ if (xc < w - 1) {
+ loc_sum += level[1];
+ if (xc < w - 2)
+ loc_sum += level[2] - hist_value;
+ if (yc < h - 1)
+ loc_sum += level[w + 1] - hist_value;
+ }
+ if (yc < h - 1) {
+ loc_sum += level[w];
+ if (yc < h - 2)
+ loc_sum += level[w << 1] - hist_value;
+ }
+ return loc_sum;
+}
+
+//9.3.4.2.7 Derivation process for the variables locNumSig, locSumAbsPass1
+static int get_local_sum_ts(const int *level, const int w, const int h, const int xc, const int yc)
+{
+ int loc_sum = 0;
+ level += w * yc + xc;
+ if (xc > 0)
+ loc_sum += level[-1];
+ if (yc > 0)
+ loc_sum += level[-w];
+ return loc_sum;
+}
+
+static int get_gtx_flag_inc(const ResidualCoding* rc, const int xc, const int yc, const int last)
+{
+ const TransformBlock *tb = rc->tb;
+ int inc;
+ if (last) {
+ const int incs[] = {0, 21, 21};
+ inc = incs[tb->c_idx];
+ } else {
+ const int d = xc + yc;
+ const int local_sum_sig = get_local_sum(rc->sig_coeff_flag,
+ tb->tb_width,tb->tb_height, xc, yc, rc->hist_value);
+ const int loc_sum_abs_pass1 = get_local_sum(rc->abs_level_pass1,
+ tb->tb_width, tb->tb_height, xc, yc, rc->hist_value);
+ const int offset = FFMIN(loc_sum_abs_pass1 - local_sum_sig, 4);
+
+ if (!tb->c_idx)
+ inc = 1 + offset + (!d ? 15 : (d < 3 ? 10 : (d < 10 ? 5 : 0)));
+ else
+ inc = 22 + offset + (!d ? 5 : 0);
+ }
+ return inc;
+}
+
+static int abs_level_gtx_flag_decode(VVCLocalContext *lc, const int inc)
+{
+ return GET_CABAC(ABS_LEVEL_GTX_FLAG + inc);
+}
+
+static int par_level_flag_decode(VVCLocalContext *lc, const int inc)
+{
+ return GET_CABAC(PAR_LEVEL_FLAG + inc);
+}
+
+static int par_level_flag_ts_decode(VVCLocalContext *lc)
+{
+ const int inc = 32;
+ return GET_CABAC(PAR_LEVEL_FLAG + inc);
+}
+
+static int sb_coded_flag_decode(VVCLocalContext *lc, const uint8_t *sb_coded_flag,
+ const ResidualCoding *rc, const int xs, const int ys)
+{
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const TransformBlock *tb = rc->tb;
+ const int w = rc->width_in_sbs;
+ const int h = rc->height_in_sbs;
+ int inc;
+
+ if (tb->ts && !rsh->sh_ts_residual_coding_disabled_flag) {
+ const int left = xs > 0 ? sb_coded_flag[-1] : 0;
+ const int above = ys > 0 ? sb_coded_flag[-w] : 0;
+ inc = left + above + 4;
+ } else {
+ const int right = (xs < w - 1) ? sb_coded_flag[1] : 0;
+ const int bottom = (ys < h - 1) ? sb_coded_flag[w] : 0;
+ inc = (right | bottom) + (tb->c_idx ? 2 : 0);
+ }
+ return GET_CABAC(SB_CODED_FLAG + inc);
+}
+
+static int sig_coeff_flag_decode(VVCLocalContext *lc, const ResidualCoding* rc, const int xc, const int yc)
+{
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const TransformBlock *tb = rc->tb;
+ int inc;
+
+ if (tb->ts && !rsh->sh_ts_residual_coding_disabled_flag) {
+ const int local_num_sig = get_local_sum_ts(rc->sig_coeff_flag, tb->tb_width, tb->tb_height, xc, yc);
+ inc = 60 + local_num_sig;
+ } else {
+ const int d = xc + yc;
+ const int loc_sum_abs_pass1 = get_local_sum(rc->abs_level_pass1,
+ tb->tb_width, tb->tb_height, xc, yc, 0);
+
+ if (!tb->c_idx) {
+ inc = 12 * FFMAX(0, rc->qstate - 1) + FFMIN((loc_sum_abs_pass1 + 1) >> 1, 3) + ((d < 2) ? 8 : (d < 5 ? 4 : 0));
+ } else {
+ inc = 36 + 8 * FFMAX(0, rc->qstate - 1) + FFMIN((loc_sum_abs_pass1 + 1) >> 1, 3) + (d < 2 ? 4 : 0);
+ }
+ }
+ return GET_CABAC(SIG_COEFF_FLAG + inc);
+}
+
+static int abs_get_rice_param(VVCLocalContext *lc, const ResidualCoding* rc,
+ const int xc, const int yc, const int base_level)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ const TransformBlock* tb = rc->tb;
+ const int rice_params[] = {
+ 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3,
+ };
+ int loc_sum_abs;
+ int shift_val;
+
+ loc_sum_abs = get_local_sum(rc->abs_level, tb->tb_width, tb->tb_height, xc,
+ yc, rc->hist_value);
+
+ if (!sps->r->sps_rrc_rice_extension_flag) {
+ shift_val = 0;
+ } else {
+ shift_val = (av_log2(FFMAX(FFMIN(loc_sum_abs, 2048), 8)) - 3) & ~1;
+ }
+
+ loc_sum_abs = av_clip_uintp2((loc_sum_abs >> shift_val) - base_level * 5, 5);
+
+ return rice_params[loc_sum_abs] + shift_val;
+}
+
+static int abs_decode(VVCLocalContext *lc, const int c_rice_param)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ const int MAX_BIN = 6;
+ int prefix = 0;
+ int suffix = 0;
+
+ while (prefix < MAX_BIN && get_cabac_bypass(&lc->ep->cc))
+ prefix++;
+ if (prefix < MAX_BIN) {
+ for (int i = 0; i < c_rice_param; i++) {
+ suffix = (suffix << 1) | get_cabac_bypass(&lc->ep->cc);
+ }
+ } else {
+ suffix = limited_kth_order_egk_decode(&lc->ep->cc,
+ c_rice_param + 1,
+ 26 - sps->log2_transform_range,
+ sps->log2_transform_range);
+ }
+ return suffix + (prefix << c_rice_param);
+}
+
+static int abs_remainder_decode(VVCLocalContext *lc, const ResidualCoding* rc, const int xc, const int yc)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const int base_level[][2][2] = {
+ { {4, 4}, {4, 4} },
+ { {3, 2}, {2, 1} }
+ };
+ const int c_rice_param = abs_get_rice_param(lc, rc, xc, yc,
+ base_level[sps->r->sps_rrc_rice_extension_flag][sps->bit_depth > 12][IS_I(rsh)]);
+ const int rem = abs_decode(lc, c_rice_param);
+
+ return rem;
+}
+
+static int abs_remainder_ts_decode(VVCLocalContext *lc, const ResidualCoding* rc, const int xc, const int yc)
+{
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const int c_rice_param = rsh->sh_ts_residual_coding_rice_idx_minus1 + 1;
+ const int rem = abs_decode(lc, c_rice_param);
+
+ return rem;
+}
+
+static int coeff_sign_flag_decode(VVCLocalContext *lc)
+{
+ return get_cabac_bypass(&lc->ep->cc);
+}
+
+//9.3.4.2.10 Derivation process of ctxInc for the syntax element coeff_sign_flag for transform skip mode
+static int coeff_sign_flag_ts_decode(VVCLocalContext *lc, const CodingUnit *cu, const ResidualCoding *rc, const int xc, const int yc)
+{
+ const TransformBlock *tb = rc->tb;
+ const int w = tb->tb_width;
+ const int *level = rc->coeff_sign_level + yc * w + xc;
+ const int left_sign = xc ? level[-1] : 0;
+ const int above_sign = yc ? level[-w] : 0;
+ const int bdpcm_flag = cu->bdpcm_flag[tb->c_idx];
+ int inc;
+
+ if (left_sign == -above_sign)
+ inc = bdpcm_flag ? 3 : 0;
+ else if (left_sign >= 0 && above_sign >= 0)
+ inc = bdpcm_flag ? 4 : 1;
+ else
+ inc = bdpcm_flag ? 5 : 2;
+ return GET_CABAC(COEFF_SIGN_FLAG + inc);
+}
+
+static int abs_level_gt1_flag_ts_decode(VVCLocalContext *lc, const CodingUnit *cu, const ResidualCoding *rc, const int xc, const int yc)
+{
+ const TransformBlock *tb = rc->tb;
+ const int *sig_coeff_flag = rc->sig_coeff_flag + yc * tb->tb_width + xc;
+ int inc;
+
+ if (cu->bdpcm_flag[tb->c_idx]) {
+ inc = 67;
+ } else {
+ const int l = xc > 0 ? sig_coeff_flag[-1] : 0;
+ const int a = yc > 0 ? sig_coeff_flag[-tb->tb_width] : 0;
+ inc = 64 + a + l;
+ }
+ return GET_CABAC(ABS_LEVEL_GTX_FLAG + inc);
+}
+
+static int abs_level_gtx_flag_ts_decode(VVCLocalContext *lc, const int j)
+{
+ const int inc = 67 + j;
+ return GET_CABAC(ABS_LEVEL_GTX_FLAG + inc);
+}
+
+static const uint8_t qstate_translate_table[][2] = {
+ { 0, 2 }, { 2, 0 }, { 1, 3 }, { 3, 1 }
+};
+
+static int dec_abs_level_decode(VVCLocalContext *lc, const ResidualCoding *rc,
+ const int xc, const int yc, int *abs_level)
+{
+ const int c_rice_param = abs_get_rice_param(lc, rc, xc, yc, 0);
+ const int dec_abs_level = abs_decode(lc, c_rice_param);
+ const int zero_pos = (rc->qstate < 2 ? 1 : 2) << c_rice_param;
+
+ *abs_level = 0;
+ if (dec_abs_level != zero_pos) {
+ *abs_level = dec_abs_level;
+ if (dec_abs_level < zero_pos)
+ *abs_level += 1;
+ }
+ return dec_abs_level;
+}
+
+static void ep_update_hist(EntryPoint *ep, ResidualCoding *rc,
+ const int remainder, const int addin)
+{
+ int *stat = ep->stat_coeff + rc->tb->c_idx;
+ if (rc->update_hist && remainder > 0) {
+ *stat = (*stat + av_log2(remainder) + addin) >> 1;
+ rc->update_hist = 0;
+ }
+}
+
+static void init_residual_coding(const VVCLocalContext *lc, ResidualCoding *rc,
+ const int log2_zo_tb_width, const int log2_zo_tb_height,
+ TransformBlock *tb)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ int log2_sb_w = (FFMIN(log2_zo_tb_width, log2_zo_tb_height ) < 2 ? 1 : 2 );
+ int log2_sb_h = log2_sb_w;
+
+ if ( log2_zo_tb_width + log2_zo_tb_height > 3 ) {
+ if ( log2_zo_tb_width < 2 ) {
+ log2_sb_w = log2_zo_tb_width;
+ log2_sb_h = 4 - log2_sb_w;
+ } else if ( log2_zo_tb_height < 2 ) {
+ log2_sb_h = log2_zo_tb_height;
+ log2_sb_w = 4 - log2_sb_h;
+ }
+ }
+ rc->log2_sb_w = log2_sb_w;
+ rc->log2_sb_h = log2_sb_h;
+ rc->num_sb_coeff = 1 << (log2_sb_w + log2_sb_h);
+ rc->last_sub_block = ( 1 << ( log2_zo_tb_width + log2_zo_tb_height - (log2_sb_w + log2_sb_h))) - 1;
+ rc->hist_value = sps->r->sps_persistent_rice_adaptation_enabled_flag ? (1 << lc->ep->stat_coeff[tb->c_idx]) : 0;
+ rc->update_hist = sps->r->sps_persistent_rice_adaptation_enabled_flag ? 1 : 0;
+ rc->rem_bins_pass1 = (( 1 << ( log2_zo_tb_width + log2_zo_tb_height)) * 7 ) >> 2;
+
+
+ rc->sb_scan_x_off = ff_vvc_diag_scan_x[log2_zo_tb_width - log2_sb_w][log2_zo_tb_height - log2_sb_h];
+ rc->sb_scan_y_off = ff_vvc_diag_scan_y[log2_zo_tb_width - log2_sb_w][log2_zo_tb_height - log2_sb_h];
+
+ rc->scan_x_off = ff_vvc_diag_scan_x[log2_sb_w][log2_sb_h];
+ rc->scan_y_off = ff_vvc_diag_scan_y[log2_sb_w][log2_sb_h];
+
+ rc->infer_sb_cbf = 1;
+
+ rc->width_in_sbs = (1 << (log2_zo_tb_width - log2_sb_w));
+ rc->height_in_sbs = (1 << (log2_zo_tb_height - log2_sb_h));
+ rc->nb_sbs = rc->width_in_sbs * rc->height_in_sbs;
+
+ rc->last_scan_pos = rc->num_sb_coeff;
+ rc->qstate = 0;
+
+ rc->tb = tb;
+}
+
+static int residual_ts_coding_subblock(VVCLocalContext *lc, ResidualCoding* rc, const int i)
+{
+ const CodingUnit *cu = lc->cu;
+ TransformBlock *tb = rc->tb;
+ const int bdpcm_flag = cu->bdpcm_flag[tb->c_idx];
+ const int xs = rc->sb_scan_x_off[i];
+ const int ys = rc->sb_scan_y_off[i];
+ uint8_t *sb_coded_flag = rc->sb_coded_flag + ys * rc->width_in_sbs + xs;
+ int infer_sb_sig_coeff_flag = 1;
+ int last_scan_pos_pass1 = -1, last_scan_pos_pass2 = -1, n;
+ int abs_level_gtx_flag[MAX_SUB_BLOCK_SIZE * MAX_SUB_BLOCK_SIZE];
+ int abs_level_pass2[MAX_SUB_BLOCK_SIZE * MAX_SUB_BLOCK_SIZE]; ///< AbsLevelPass2
+
+ if (i != rc->last_sub_block || !rc->infer_sb_cbf)
+ *sb_coded_flag = sb_coded_flag_decode(lc, sb_coded_flag, rc, xs, ys);
+ else
+ *sb_coded_flag = 1;
+ if (*sb_coded_flag && i < rc->last_sub_block)
+ rc->infer_sb_cbf = 0;
+
+ //first scan pass
+ for (n = 0; n < rc->num_sb_coeff && rc->rem_bins_pass1 >= 4; n++) {
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ const int off = yc * tb->tb_width + xc;
+ int *sig_coeff_flag = rc->sig_coeff_flag + off;
+ int *abs_level_pass1 = rc->abs_level_pass1 + off;
+ int *coeff_sign_level = rc->coeff_sign_level + off;
+ int par_level_flag = 0;
+
+ abs_level_gtx_flag[n] = 0;
+ last_scan_pos_pass1 = n;
+ if (*sb_coded_flag && (n != rc->num_sb_coeff - 1 || !infer_sb_sig_coeff_flag)) {
+ *sig_coeff_flag = sig_coeff_flag_decode(lc, rc, xc, yc);
+ rc->rem_bins_pass1--;
+ if (*sig_coeff_flag)
+ infer_sb_sig_coeff_flag = 0;
+ } else {
+ *sig_coeff_flag = (n == rc->num_sb_coeff - 1) && infer_sb_sig_coeff_flag && *sb_coded_flag;
+ }
+ *coeff_sign_level = 0;
+ if (*sig_coeff_flag) {
+ *coeff_sign_level = 1 - 2 * coeff_sign_flag_ts_decode(lc, cu, rc, xc, yc);
+ abs_level_gtx_flag[n] = abs_level_gt1_flag_ts_decode(lc, cu, rc, xc, yc);
+ rc->rem_bins_pass1 -= 2;
+ if (abs_level_gtx_flag[n]) {
+ par_level_flag = par_level_flag_ts_decode(lc);
+ rc->rem_bins_pass1--;
+ }
+ }
+ *abs_level_pass1 = *sig_coeff_flag + par_level_flag + abs_level_gtx_flag[n];
+ }
+
+ //greater than x scan pass
+ for (n = 0; n < rc->num_sb_coeff && rc->rem_bins_pass1 >= 4; n++) {
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ const int off = yc * tb->tb_width + xc;
+
+ abs_level_pass2[n] = rc->abs_level_pass1[off];
+ for (int j = 1; j < 5 && abs_level_gtx_flag[n]; j++) {
+ abs_level_gtx_flag[n] = abs_level_gtx_flag_ts_decode(lc, j);
+ abs_level_pass2[n] += abs_level_gtx_flag[n] << 1;
+ rc->rem_bins_pass1--;
+ }
+ last_scan_pos_pass2 = n;
+ }
+
+ /* remainder scan pass */
+ for (n = 0; n < rc->num_sb_coeff; n++) {
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ const int off = yc * tb->tb_width + xc;
+ const int *abs_level_pass1 = rc->abs_level_pass1 + off;
+ int *abs_level = rc->abs_level + off;
+ int *coeff_sign_level = rc->coeff_sign_level + off;
+ int abs_remainder = 0;
+
+ if ((n <= last_scan_pos_pass2 && abs_level_pass2[n] >= 10) ||
+ (n > last_scan_pos_pass2 && n <= last_scan_pos_pass1 &&
+ *abs_level_pass1 >= 2) ||
+ (n > last_scan_pos_pass1 && *sb_coded_flag))
+ abs_remainder = abs_remainder_ts_decode(lc, rc, xc, yc);
+ if (n <= last_scan_pos_pass2) {
+ *abs_level = abs_level_pass2[n] + 2 * abs_remainder;
+ } else if (n <= last_scan_pos_pass1) {
+ *abs_level = *abs_level_pass1 + 2 * abs_remainder;
+ } else {
+ *abs_level = abs_remainder;
+ if (abs_remainder) {
+ //n > lastScanPosPass1
+ *coeff_sign_level = 1 - 2 * coeff_sign_flag_decode(lc);
+ }
+ }
+ if (!bdpcm_flag && n <= last_scan_pos_pass1) {
+ const int left = xc > 0 ? abs_level[-1] : 0;
+ const int above = yc > 0 ? abs_level[-tb->tb_width] : 0;
+ const int pred = FFMAX(left, above);
+
+ if (*abs_level == 1 && pred > 0)
+ *abs_level = pred;
+ else if (*abs_level > 0 && *abs_level <= pred)
+ (*abs_level)--;
+ }
+ if (*abs_level) {
+ tb->coeffs[off] = *coeff_sign_level * *abs_level;
+ tb->max_scan_x = FFMAX(xc, tb->max_scan_x);
+ tb->max_scan_y = FFMAX(yc, tb->max_scan_y);
+ tb->min_scan_x = FFMIN(xc, tb->min_scan_x);
+ tb->min_scan_y = FFMIN(yc, tb->min_scan_y);
+ } else {
+ tb->coeffs[off] = 0;
+ }
+ }
+
+ return 0;
+}
+
+static int hls_residual_ts_coding(VVCLocalContext *lc, TransformBlock *tb)
+{
+ ResidualCoding rc;
+ tb->min_scan_x = tb->min_scan_y = INT_MAX;
+ init_residual_coding(lc, &rc, tb->log2_tb_width, tb->log2_tb_height, tb);
+ for (int i = 0; i <= rc.last_sub_block; i++) {
+ int ret = residual_ts_coding_subblock(lc, &rc, i);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static inline int residual_coding_subblock(VVCLocalContext *lc, ResidualCoding *rc, const int i)
+{
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ TransformBlock *tb = rc->tb;
+ int first_sig_scan_pos_sb, last_sig_scan_pos_sb;
+ int first_pos_mode0, first_pos_mode1;
+ int infer_sb_dc_sig_coeff_flag = 0;
+ int n, sig_hidden_flag, sum = 0;
+ int abs_level_gt2_flag[MAX_SUB_BLOCK_SIZE * MAX_SUB_BLOCK_SIZE];
+ const int start_qstate_sb = rc->qstate;
+ const int xs = rc->sb_scan_x_off[i];
+ const int ys = rc->sb_scan_y_off[i];
+ uint8_t *sb_coded_flag = rc->sb_coded_flag + ys * rc->width_in_sbs + xs;
+
+
+ av_assert0(rc->num_sb_coeff <= MAX_SUB_BLOCK_SIZE * MAX_SUB_BLOCK_SIZE);
+ if (i < rc->last_sub_block && i > 0) {
+ *sb_coded_flag = sb_coded_flag_decode(lc, sb_coded_flag, rc, xs, ys);
+ infer_sb_dc_sig_coeff_flag = 1;
+ } else {
+ *sb_coded_flag = 1;
+ }
+ if (*sb_coded_flag && (xs > 3 || ys > 3) && !tb->c_idx)
+ lc->parse.mts_zero_out_sig_coeff_flag = 0;
+
+ if (!*sb_coded_flag)
+ return 0;
+
+ first_sig_scan_pos_sb = rc->num_sb_coeff;
+ last_sig_scan_pos_sb = -1;
+ first_pos_mode0 = (i == rc->last_sub_block ? rc->last_scan_pos : rc->num_sb_coeff -1);
+ first_pos_mode1 = first_pos_mode0;
+ for (n = first_pos_mode0; n >= 0 && rc->rem_bins_pass1 >= 4; n--) {
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ const int last = (xc == rc->last_significant_coeff_x && yc == rc->last_significant_coeff_y);
+ int *abs_level_pass1 = rc->abs_level_pass1 + yc * tb->tb_width + xc;
+ int *sig_coeff_flag = rc->sig_coeff_flag + yc * tb->tb_width + xc;
+
+ if ((n > 0 || !infer_sb_dc_sig_coeff_flag ) && !last) {
+ *sig_coeff_flag = sig_coeff_flag_decode(lc, rc, xc, yc);
+ rc->rem_bins_pass1--;
+ if (*sig_coeff_flag)
+ infer_sb_dc_sig_coeff_flag = 0;
+ } else {
+ *sig_coeff_flag = last || (!rc->scan_x_off[n] && !rc ->scan_y_off[n] &&
+ infer_sb_dc_sig_coeff_flag);
+ }
+ *abs_level_pass1 = 0;
+ if (*sig_coeff_flag) {
+ int abs_level_gt1_flag, par_level_flag = 0;
+ const int inc = get_gtx_flag_inc(rc, xc, yc, last);
+ abs_level_gt1_flag = abs_level_gtx_flag_decode(lc, inc);
+ rc->rem_bins_pass1--;
+ if (abs_level_gt1_flag) {
+ par_level_flag = par_level_flag_decode(lc, inc);
+ abs_level_gt2_flag[n] = abs_level_gtx_flag_decode(lc, inc + 32);
+ rc->rem_bins_pass1 -= 2;
+ } else {
+ abs_level_gt2_flag[n] = 0;
+ }
+ if (last_sig_scan_pos_sb == -1)
+ last_sig_scan_pos_sb = n;
+ first_sig_scan_pos_sb = n;
+
+ *abs_level_pass1 =
+ 1 + par_level_flag + abs_level_gt1_flag + (abs_level_gt2_flag[n] << 1);
+ } else {
+ abs_level_gt2_flag[n] = 0;
+ }
+
+ if (rsh->sh_dep_quant_used_flag)
+ rc->qstate = qstate_translate_table[rc->qstate][*abs_level_pass1 & 1];
+
+ first_pos_mode1 = n - 1;
+ }
+ for (n = first_pos_mode0; n > first_pos_mode1; n--) {
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ const int *abs_level_pass1 = rc->abs_level_pass1 + yc * tb->tb_width + xc;
+ int *abs_level = rc->abs_level + yc * tb->tb_width + xc;
+
+ *abs_level = *abs_level_pass1;
+ if (abs_level_gt2_flag[n]) {
+ const int abs_remainder = abs_remainder_decode(lc, rc, xc, yc);
+ ep_update_hist(lc->ep, rc, abs_remainder, 2);
+ *abs_level += 2 * abs_remainder;
+ }
+ }
+ for (n = first_pos_mode1; n >= 0; n--) {
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ int *abs_level = rc->abs_level + yc * tb->tb_width + xc;
+
+ if (*sb_coded_flag) {
+ const int dec_abs_level = dec_abs_level_decode(lc, rc, xc, yc, abs_level);
+ ep_update_hist(lc->ep, rc, dec_abs_level, 0);
+ }
+ if (*abs_level > 0) {
+ if (last_sig_scan_pos_sb == -1)
+ last_sig_scan_pos_sb = n;
+ first_sig_scan_pos_sb = n;
+ }
+ if (rsh->sh_dep_quant_used_flag)
+ rc->qstate = qstate_translate_table[rc->qstate][*abs_level & 1];
+ }
+ sig_hidden_flag = rsh->sh_sign_data_hiding_used_flag &&
+ (last_sig_scan_pos_sb - first_sig_scan_pos_sb > 3 ? 1 : 0);
+
+ if (rsh->sh_dep_quant_used_flag)
+ rc->qstate = start_qstate_sb;
+ n = (i == rc->last_sub_block ? rc->last_scan_pos : rc->num_sb_coeff -1);
+ for (/* nothing */; n >= 0; n--) {
+ int trans_coeff_level;
+ const int xc = (xs << rc->log2_sb_w) + rc->scan_x_off[n];
+ const int yc = (ys << rc->log2_sb_h) + rc->scan_y_off[n];
+ const int off = yc * tb->tb_width + xc;
+ const int *abs_level = rc->abs_level + off;
+
+ if (*abs_level > 0) {
+ int sign = 1;
+ if (!sig_hidden_flag || (n != first_sig_scan_pos_sb))
+ sign = 1 - 2 * coeff_sign_flag_decode(lc);
+ if (rsh->sh_dep_quant_used_flag) {
+ trans_coeff_level = (2 * *abs_level - (rc->qstate > 1)) * sign;
+ } else {
+ trans_coeff_level = *abs_level * sign;
+ if (sig_hidden_flag) {
+ sum += *abs_level;
+ if (n == first_sig_scan_pos_sb && (sum % 2))
+ trans_coeff_level = -trans_coeff_level;
+ }
+ }
+ tb->coeffs[off] = trans_coeff_level;
+ tb->max_scan_x = FFMAX(xc, tb->max_scan_x);
+ tb->max_scan_y = FFMAX(yc, tb->max_scan_y);
+ }
+ if (rsh->sh_dep_quant_used_flag)
+ rc->qstate = qstate_translate_table[rc->qstate][*abs_level & 1];
+ }
+
+ return 0;
+}
+
+static void derive_last_scan_pos(ResidualCoding *rc)
+{
+ int xc, yc, xs, ys;
+ do {
+ if (!rc->last_scan_pos) {
+ rc->last_scan_pos = rc->num_sb_coeff;
+ rc->last_sub_block--;
+ }
+ rc->last_scan_pos--;
+ xs = rc->sb_scan_x_off[rc->last_sub_block];
+ ys = rc->sb_scan_y_off[rc->last_sub_block];
+ xc = (xs << rc->log2_sb_w) + rc->scan_x_off[rc->last_scan_pos];
+ yc = (ys << rc->log2_sb_h) + rc->scan_y_off[rc->last_scan_pos];
+ } while ((xc != rc->last_significant_coeff_x) || (yc != rc->last_significant_coeff_y));
+}
+
+static void last_significant_coeff_x_y_decode(ResidualCoding *rc, VVCLocalContext *lc,
+ const int log2_zo_tb_width, const int log2_zo_tb_height)
+{
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const TransformBlock *tb = rc->tb;
+ int last_significant_coeff_x, last_significant_coeff_y;
+
+ last_significant_coeff_x = last_significant_coeff_x_prefix_decode(lc,
+ tb->log2_tb_width, log2_zo_tb_width, tb->c_idx);
+
+ last_significant_coeff_y = last_significant_coeff_y_prefix_decode(lc,
+ tb->log2_tb_height, log2_zo_tb_height, tb->c_idx);
+
+ if (last_significant_coeff_x > 3) {
+ int suffix = last_sig_coeff_suffix_decode(lc, last_significant_coeff_x);
+ last_significant_coeff_x = (1 << ((last_significant_coeff_x >> 1) - 1)) *
+ (2 + (last_significant_coeff_x & 1)) + suffix;
+ }
+ if (last_significant_coeff_y > 3) {
+ int suffix = last_sig_coeff_suffix_decode(lc, last_significant_coeff_y);
+ last_significant_coeff_y = (1 << ((last_significant_coeff_y >> 1) - 1)) *
+ (2 + (last_significant_coeff_y & 1)) + suffix;
+ }
+ if (rsh->sh_reverse_last_sig_coeff_flag) {
+ last_significant_coeff_x = (1 << log2_zo_tb_width) - 1 - last_significant_coeff_x;
+ last_significant_coeff_y = (1 << log2_zo_tb_height) - 1 - last_significant_coeff_y;
+ }
+ rc->last_significant_coeff_x = last_significant_coeff_x;
+ rc->last_significant_coeff_y = last_significant_coeff_y;
+}
+
+static int hls_residual_coding(VVCLocalContext *lc, TransformBlock *tb)
+{
+ const VVCSPS *sps = lc->fc->ps.sps;
+ const CodingUnit *cu = lc->cu;
+ const int log2_tb_width = tb->log2_tb_width;
+ const int log2_tb_height = tb->log2_tb_height;
+ const int c_idx = tb->c_idx;
+ int log2_zo_tb_width, log2_zo_tb_height;
+ ResidualCoding rc;
+
+ if (sps->r->sps_mts_enabled_flag && cu->sbt_flag && !c_idx && log2_tb_width == 5 && log2_tb_height < 6)
+ log2_zo_tb_width = 4;
+ else
+ log2_zo_tb_width = FFMIN(log2_tb_width, 5 );
+
+ if (sps->r->sps_mts_enabled_flag && cu->sbt_flag && !c_idx && log2_tb_width < 6 && log2_tb_height == 5 )
+ log2_zo_tb_height = 4;
+ else
+ log2_zo_tb_height = FFMIN(log2_tb_height, 5);
+
+ init_residual_coding(lc, &rc, log2_zo_tb_width, log2_zo_tb_height, tb);
+ last_significant_coeff_x_y_decode(&rc, lc, log2_zo_tb_width, log2_zo_tb_height);
+ derive_last_scan_pos(&rc);
+
+ if (!rc.last_sub_block && log2_tb_width >= 2 && log2_tb_height >= 2 && !tb->ts && rc.last_scan_pos > 0)
+ lc->parse.lfnst_dc_only = 0;
+ if ((rc.last_sub_block > 0 && log2_tb_width >= 2 && log2_tb_height >= 2 ) ||
+ (rc.last_scan_pos > 7 && (log2_tb_width == 2 || log2_tb_width == 3 ) &&
+ log2_tb_width == log2_tb_height))
+ lc->parse.lfnst_zero_out_sig_coeff_flag = 0;
+ if ((rc.last_sub_block > 0 || rc.last_scan_pos > 0 ) && !c_idx)
+ lc->parse.mts_dc_only = 0;
+
+ memset(tb->coeffs, 0, tb->tb_width * tb->tb_height * sizeof(*tb->coeffs));
+ memset(rc.abs_level, 0, tb->tb_width * tb->tb_height * sizeof(rc.abs_level[0]));
+ memset(rc.sb_coded_flag, 0, rc.nb_sbs);
+ memset(rc.abs_level_pass1, 0, tb->tb_width * tb->tb_height * sizeof(rc.abs_level_pass1[0]));
+ memset(rc.sig_coeff_flag, 0, tb->tb_width * tb->tb_height * sizeof(rc.sig_coeff_flag[0]));
+
+ for (int i = rc.last_sub_block; i >= 0; i--) {
+ int ret = residual_coding_subblock(lc, &rc, i);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+int ff_vvc_residual_coding(VVCLocalContext *lc, TransformBlock *tb)
+{
+ const H266RawSliceHeader *rsh = lc->sc->sh.r;
+ const int ts = !rsh->sh_ts_residual_coding_disabled_flag && tb->ts;
+
+ return ts ? hls_residual_ts_coding(lc, tb) : hls_residual_coding(lc, tb);
+}
+
+int ff_vvc_cu_coded_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CU_CODED_FLAG);
+}
+
+int ff_vvc_sbt_flag(VVCLocalContext *lc)
+{
+ const int w = lc->cu->cb_width;
+ const int h = lc->cu->cb_height;
+ const int inc = w * h <= 256;
+ return GET_CABAC(CU_SBT_FLAG + inc);
+}
+
+int ff_vvc_sbt_quad_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CU_SBT_QUAD_FLAG);
+}
+
+int ff_vvc_sbt_horizontal_flag(VVCLocalContext *lc)
+{
+ const int w = lc->cu->cb_width;
+ const int h = lc->cu->cb_height;
+ const int inc = (w == h) ? 0 : ((w < h) ? 1 : 2);
+ return GET_CABAC(CU_SBT_HORIZONTAL_FLAG + inc);
+}
+
+int ff_vvc_sbt_pos_flag(VVCLocalContext *lc)
+{
+ return GET_CABAC(CU_SBT_POS_FLAG);
+}
+
+int ff_vvc_lfnst_idx(VVCLocalContext *lc, const int inc)
+{
+ if (!GET_CABAC(LFNST_IDX + inc))
+ return 0;
+ if (!GET_CABAC(LFNST_IDX + 2))
+ return 1;
+ return 2;
+}
+
+int ff_vvc_mts_idx(VVCLocalContext *lc)
+{
+ int i;
+ for (i = 0; i < 4; i++) {
+ if (!GET_CABAC(MTS_IDX + i))
+ return i;
+ }
+ return i;
+}
+
+int ff_vvc_end_of_slice_flag_decode(VVCLocalContext *lc)
+{
+ return get_cabac_terminate(&lc->ep->cc);
+}
+
+int ff_vvc_end_of_tile_one_bit(VVCLocalContext *lc)
+{
+ return get_cabac_terminate(&lc->ep->cc);
+}
+
+int ff_vvc_end_of_subset_one_bit(VVCLocalContext *lc)
+{
+ return get_cabac_terminate(&lc->ep->cc);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-21 14:26:14 +0000