| 53 | using namespace parser::reader; |
| 54 | |
| 55 | void slice_header::parse(SubByteReaderLogging & reader, |
| 56 | NalType nal_unit_type, |
| 57 | VPSMap & vpsMap, |
| 58 | SPSMap & spsMap, |
| 59 | PPSMap & ppsMap, |
| 60 | std::shared_ptr<slice_layer_rbsp> sliceLayer, |
| 61 | std::shared_ptr<picture_header_structure> picHeader) |
| 62 | { |
| 63 | SubByteReaderLoggingSubLevel subLevel(reader, "slice_header"); |
| 64 | |
| 65 | this->sh_picture_header_in_slice_header_flag = |
| 66 | reader.readFlag("sh_picture_header_in_slice_header_flag"); |
| 67 | if (this->sh_picture_header_in_slice_header_flag) |
| 68 | { |
| 69 | this->picture_header_structure_instance = std::make_shared<picture_header_structure>(); |
| 70 | this->picture_header_structure_instance->parse(reader, vpsMap, spsMap, ppsMap, sliceLayer); |
| 71 | picHeader = this->picture_header_structure_instance; |
| 72 | } |
| 73 | |
| 74 | if (!picHeader) |
| 75 | throw std::logic_error("No picture_header_structure given for parsing of slice_header."); |
| 76 | |
| 77 | if (ppsMap.count(picHeader->ph_pic_parameter_set_id) == 0) |
| 78 | throw std::logic_error("PPS with given ph_pic_parameter_set_id not found."); |
| 79 | auto pps = ppsMap[picHeader->ph_pic_parameter_set_id]; |
| 80 | |
| 81 | if (spsMap.count(pps->pps_seq_parameter_set_id) == 0) |
| 82 | throw std::logic_error("SPS with given pps_seq_parameter_set_id not found."); |
| 83 | auto sps = spsMap[pps->pps_seq_parameter_set_id]; |
| 84 | |
| 85 | auto CurrSubpicIdx = 0u; |
| 86 | if (sps->sps_subpic_info_present_flag) |
| 87 | { |
| 88 | auto nrBits = sps->sps_subpic_id_len_minus1 + 1; |
| 89 | this->sh_subpic_id = reader.readBits("sh_subpic_id", nrBits); |
| 90 | |
| 91 | for (unsigned i = 0; i < pps->SubpicIdVal.size(); i++) |
| 92 | { |
| 93 | if (pps->SubpicIdVal.at(i) == this->sh_subpic_id) |
| 94 | { |
| 95 | CurrSubpicIdx = i; |
| 96 | break; |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | if ((pps->pps_rect_slice_flag && pps->NumSlicesInSubpic[CurrSubpicIdx] > 1) || |
| 102 | (!pps->pps_rect_slice_flag && pps->NumTilesInPic > 1)) |
| 103 | { |
| 104 | unsigned nrBits; |
| 105 | Options opt; |
| 106 | if (!pps->pps_rect_slice_flag) |
| 107 | { |
| 108 | nrBits = std::ceil(std::log2(pps->NumTilesInPic)); |
| 109 | opt = Options().withCheckRange({0, pps->NumTilesInPic - 1}); |
| 110 | } |
| 111 | else |
| 112 | { |
nothing calls this directly
no test coverage detected