atlas.hpp

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/*****************************************************************************
 * This file is part of uvgVPCCenc V-PCC encoder.
 *
 * Copyright (c) 2024-present, Tampere University, ITU/ISO/IEC, project contributors
 * All rights reserved.
 ****************************************************************************/
 
#pragma once
 
#include <cstddef>
#include <cstdint>
#include <memory>
#include <vector>
 
#include "const_defs.h"
 
namespace uvgv3cbitstream {
 
struct ref_list_struct {
    uint8_t num_ref_entries = 0;
    std::vector<bool> st_ref_atlas_frame_flag = {};
    std::vector<uint8_t> abs_delta_afoc_st = {};
    std::vector<bool> straf_entry_sign_flag = {};
    std::vector<uint8_t> afoc_lsb_lt = {};
};
 
struct atlas_tile_header {
    bool ath_no_output_of_prior_atlas_frames_flag = false;
    uint16_t ath_atlas_frame_parameter_set_id = 0;
    uint16_t ath_atlas_adaptation_parameter_set_id = 0;
    uint16_t ath_id = 0;
    ATH ath_type = I_TILE;
    bool ath_atlas_output_flag = false;
    size_t ath_atlas_frm_order_cnt_lsb = 0;
    bool ath_ref_atlas_frame_list_asps_flag = false;
    ref_list_struct refs;
    uint8_t ath_ref_atlas_frame_list_idx = 0;
    std::vector<bool> ath_additional_afoc_lsb_present_flag = {0};
    std::vector<uint8_t> ath_additional_afoc_lsb_val = {0};
    uint8_t ath_pos_min_d_quantizer = 0;
    uint8_t ath_pos_delta_max_d_quantizer = 0;
    uint8_t ath_patch_size_x_info_quantizer = 0;
    uint8_t ath_patch_size_y_info_quantizer = 0;
    uint8_t ath_raw_3d_offset_axis_bit_count_minus1 = 0;
    bool ath_num_ref_idx_active_override_flag = false;
    uint8_t ath_num_ref_idx_active_minus1 = 0;
};
 
struct plr_data {};
struct patch_data_unit {
    size_t pdu_2d_pos_x = 0;
    size_t pdu_2d_pos_y = 0;
    uint64_t pdu_2d_size_x_minus1 = 0;
    uint64_t pdu_2d_size_y_minus1 = 0;
    size_t pdu_3d_offset_u = 0;
    size_t pdu_3d_offset_v = 0;
    size_t pdu_3d_offset_d = 0;
    size_t pdu_3d_range_d = 0;
    size_t pdu_projection_id = 0;
    size_t pdu_orientation_index = 0;
    bool pdu_lod_enabled_flag = false;
    uint8_t pdu_lod_scale_x_minus1 = 0;
    uint8_t pdu_lod_scale_y_idc = 1;
    plr_data plr_data_;
};
struct inter_patch_data_unit {};
struct merge_patch_data_unit {};
struct skip_patch_data_unit {};
struct raw_patch_data_unit {};
struct eom_patch_data_unit {};
 
struct patch_information_data {
    uint8_t patchMode = 0;
    patch_data_unit patch_data_unit_;
    inter_patch_data_unit inter_patch_data_unit_;
    merge_patch_data_unit merge_patch_data_unit_;
    skip_patch_data_unit skip_patch_data_unit_;
    raw_patch_data_unit raw_patch_data_unit_;
    eom_patch_data_unit eom_patch_data_unit_;
};
 
struct atlas_tile_data_unit {
    std::vector<patch_information_data> patch_information_data_;
};
 
struct atlas_tile_layer_rbsp {
    atlas_tile_header ath_;
    atlas_tile_data_unit atdu_;
};
 
struct atlas_frame_tile_information {
    bool afti_single_tile_in_atlas_frame_flag = false;
    bool afti_uniform_partition_spacing_flag = false;
    uint32_t afti_partition_cols_width_minus1 = 0;
    uint32_t afti_partition_rows_height_minus1 = 0;
    uint32_t afti_num_partition_columns_minus1 = 0;
    uint32_t afti_num_partition_rows_minus1 = 0;
    std::vector<uint32_t> afti_partition_column_width_minus1 = {};
    std::vector<uint32_t> afti_partition_row_height_minus1 = {};
    bool afti_single_partition_per_tile_flag = false;
    uint32_t afti_num_tiles_in_atlas_frame_minus1 = 0;
    std::vector<uint32_t> afti_top_left_partition_idx;
    std::vector<uint32_t> afti_bottom_right_partition_column_offset;
    std::vector<uint32_t> afti_bottom_right_partition_row_offset;
    uint32_t afti_auxiliary_video_tile_row_width_minus1 = 0;
    std::vector<uint32_t> afti_auxiliary_video_tile_row_height;
    bool afti_signalled_tile_id_flag = false;
    uint32_t afti_signalled_tile_id_length_minus1 = 0;
    std::vector<uint32_t> afti_tile_id;
};
 
struct atlas_frame_parameter_set {
    uint8_t afps_atlas_frame_parameter_set_id = 0;
    uint8_t afps_atlas_sequence_parameter_set_id = 0;
    atlas_frame_tile_information afti;
    bool afps_output_flag_present_flag = false;
    uint8_t afps_num_ref_idx_default_active_minus1 = 0;
    uint8_t afps_additional_lt_afoc_lsb_len = 0;
    bool afps_lod_mode_enabled_flag = false;
    bool afps_raw_3d_offset_bit_count_explicit_mode_flag = false;
    bool afps_extension_present_flag = false;
    bool afps_miv_extension_present_flag = false;
    uint8_t afps_extension_7bits = 0;
    bool afps_extension_data_flag = false;
};
 
struct atlas_sequence_parameter_set {
    uint8_t asps_atlas_sequence_parameter_set_id = 0;
    uint16_t asps_frame_width = 0;
    uint16_t asps_frame_height = 0;
    uint8_t asps_geometry_3d_bit_depth_minus1 = 0;
    uint8_t asps_geometry_2d_bit_depth_minus1 = 0;
    uint8_t asps_log2_max_atlas_frame_order_cnt_lsb_minus4 = 4;
    uint8_t asps_max_dec_atlas_frame_buffering_minus1 = 0;
    bool asps_long_term_ref_atlas_frames_flag = false;
    uint8_t asps_num_ref_atlas_frame_lists_in_asps = 0;
    std::vector<ref_list_struct> ref_lists;
    bool asps_use_eight_orientations_flag = false;
    bool asps_extended_projection_enabled_flag = false;
    size_t asps_max_number_projections_minus1 = 5;
    bool asps_normal_axis_limits_quantization_enabled_flag = true;
    bool asps_normal_axis_max_delta_value_enabled_flag = false;
    bool asps_patch_precedence_order_flag = false;
    uint8_t asps_log2_patch_packing_block_size = 0;
    bool asps_patch_size_quantizer_present_flag = false;
    uint8_t asps_map_count_minus1 = 0;
    bool asps_pixel_deinterleaving_enabled_flag = false;
    std::vector<bool> asps_map_pixel_deinterleaving_flag = {};
    bool asps_raw_patch_enabled_flag = false;
    bool asps_eom_patch_enabled_flag = false;
    uint8_t asps_eom_fix_bit_count_minus1 = 0;
    bool asps_auxiliary_video_enabled_flag = false;
    bool asps_plr_enabled_flag = false;
    bool asps_vui_parameters_present_flag = false;
    bool asps_extension_present_flag = false;
    bool asps_vpcc_extension_present_flag = false;
    bool asps_miv_extension_present_flag = false;
    uint8_t asps_extension_6bits = 0;
    bool asps_vpcc_remove_duplicate_point_enabled_flag = false;
    uint16_t asps_vpcc_surface_thickness_minus1 = 0;
};
 
struct AtlasContext {
    atlas_sequence_parameter_set asps_;
    atlas_frame_parameter_set afps_;
    std::vector<atlas_tile_layer_rbsp> atlas_data_;
    size_t gof_id_ = 0;
    size_t atlas_sub_size_ = 0;
    std::vector<size_t> ad_nal_sizes_ = {};
    size_t ad_nal_precision_ = 0;
};
 
}  // namespace uvgv3cbitstream