public SliceHeader readPart2(SliceHeader sh, NALUnit nalUnit, SeqParameterSet sps, PictureParameterSet pps, BitReader inb) { sh.pps = pps; sh.sps = sps; sh.frame_num = CAVLCReader.readU(inb, sps.log2_max_frame_num_minus4 + 4, "SH: frame_num"); if (!sps.frame_mbs_only_flag) { sh.field_pic_flag = CAVLCReader.readBool(inb, "SH: field_pic_flag"); if (sh.field_pic_flag) { sh.bottom_field_flag = CAVLCReader.readBool(inb, "SH: bottom_field_flag"); } } if (nalUnit.type == NALUnitType.IDR_SLICE) { sh.idr_pic_id = CAVLCReader.readUE(inb, "SH: idr_pic_id"); } if (sps.pic_order_cnt_type == 0) { sh.pic_order_cnt_lsb = CAVLCReader.readU(inb, sps.log2_max_pic_order_cnt_lsb_minus4 + 4, "SH: pic_order_cnt_lsb"); if (pps.pic_order_present_flag && !sps.field_pic_flag) { sh.delta_pic_order_cnt_bottom = CAVLCReader.readSE(inb, "SH: delta_pic_order_cnt_bottom"); } } sh.delta_pic_order_cnt = new int[2]; if (sps.pic_order_cnt_type == 1 && !sps.delta_pic_order_always_zero_flag) { sh.delta_pic_order_cnt[0] = CAVLCReader.readSE(inb, "SH: delta_pic_order_cnt[0]"); if (pps.pic_order_present_flag && !sps.field_pic_flag) { sh.delta_pic_order_cnt[1] = CAVLCReader.readSE(inb, "SH: delta_pic_order_cnt[1]"); } } if (pps.redundant_pic_cnt_present_flag) { sh.redundant_pic_cnt = CAVLCReader.readUE(inb, "SH: redundant_pic_cnt"); } if (sh.slice_type == SliceType.B) { sh.direct_spatial_mv_pred_flag = CAVLCReader.readBool(inb, "SH: direct_spatial_mv_pred_flag"); } if (sh.slice_type == SliceType.P || sh.slice_type == SliceType.SP || sh.slice_type == SliceType.B) { sh.num_ref_idx_active_override_flag = CAVLCReader.readBool(inb, "SH: num_ref_idx_active_override_flag"); if (sh.num_ref_idx_active_override_flag) { sh.num_ref_idx_active_minus1[0] = CAVLCReader.readUE(inb, "SH: num_ref_idx_l0_active_minus1"); if (sh.slice_type == SliceType.B) { sh.num_ref_idx_active_minus1[1] = CAVLCReader.readUE(inb, "SH: num_ref_idx_l1_active_minus1"); } } } readRefPicListReorderinbg(sh, inb); if ((pps.weighted_pred_flag && (sh.slice_type == SliceType.P || sh.slice_type == SliceType.SP)) || (pps.weighted_bipred_idc == 1 && sh.slice_type == SliceType.B)) { readPredWeightTable(sps, pps, sh, inb); } if (nalUnit.nal_ref_idc != 0) { readDecoderPicMarkinbg(nalUnit, sh, inb); } if (pps.entropy_coding_mode_flag && sh.slice_type.isInter()) { sh.cabac_init_idc = CAVLCReader.readUE(inb, "SH: cabac_inbit_idc"); } sh.slice_qp_delta = CAVLCReader.readSE(inb, "SH: slice_qp_delta"); if (sh.slice_type == SliceType.SP || sh.slice_type == SliceType.SI) { if (sh.slice_type == SliceType.SP) { sh.sp_for_switch_flag = CAVLCReader.readBool(inb, "SH: sp_for_switch_flag"); } sh.slice_qs_delta = CAVLCReader.readSE(inb, "SH: slice_qs_delta"); } if (pps.deblocking_filter_control_present_flag) { sh.disable_deblocking_filter_idc = CAVLCReader.readUE(inb, "SH: disable_deblockinbg_filter_idc"); if (sh.disable_deblocking_filter_idc != 1) { sh.slice_alpha_c0_offset_div2 = CAVLCReader.readSE(inb, "SH: slice_alpha_c0_offset_div2"); sh.slice_beta_offset_div2 = CAVLCReader.readSE(inb, "SH: slice_beta_offset_div2"); } } if (pps.num_slice_groups_minus1 > 0 && pps.slice_group_map_type >= 3 && pps.slice_group_map_type <= 5) { int len = Utility.getPicHeightInMbs(sps) * (sps.pic_width_in_mbs_minus1 + 1) / (pps.slice_group_change_rate_minus1 + 1); if ((Utility.getPicHeightInMbs(sps) * (sps.pic_width_in_mbs_minus1 + 1)) % (pps.slice_group_change_rate_minus1 + 1) > 0) { len += 1; } len = CeilLog2(len + 1); sh.slice_group_change_cycle = CAVLCReader.readU(inb, len, "SH: slice_group_change_cycle"); } return(sh); }
// static int i = 0; private static void readDecoderPicMarkinbg(NALUnit nalUnit, SliceHeader sh, BitReader inb) { if (nalUnit.type == NALUnitType.IDR_SLICE) { bool no_output_of_prior_pics_flag = CAVLCReader.readBool(inb, "SH: no_output_of_prior_pics_flag"); bool long_term_reference_flag = CAVLCReader.readBool(inb, "SH: long_term_reference_flag"); sh.refPicMarkingIDR = new nVideo.Codecs.H264.RefPicMarkingIDR(no_output_of_prior_pics_flag, long_term_reference_flag); } else { bool adaptive_ref_pic_markinbg_mode_flag = CAVLCReader.readBool(inb, "SH: adaptive_ref_pic_markinbg_mode_flag"); if (adaptive_ref_pic_markinbg_mode_flag) { List <nVideo.Codecs.H264.RefPicMarking.Instruction> mmops = new List <nVideo.Codecs.H264.RefPicMarking.Instruction>(); int memory_management_control_operation; do { memory_management_control_operation = CAVLCReader.readUE(inb, "SH: memory_management_control_operation"); nVideo.Codecs.H264.RefPicMarking.Instruction inbstr = null; switch (memory_management_control_operation) { case 1: inbstr = new nVideo.Codecs.H264.RefPicMarking.Instruction(nVideo.Codecs.H264.RefPicMarking.InstrType.REMOVE_SHORT, CAVLCReader.readUE(inb, "SH: difference_of_pic_nums_minus1") + 1, 0); break; case 2: inbstr = new nVideo.Codecs.H264.RefPicMarking.Instruction(nVideo.Codecs.H264.RefPicMarking.InstrType.REMOVE_LONG, CAVLCReader.readUE(inb, "SH: long_term_pic_num"), 0); break; case 3: inbstr = new nVideo.Codecs.H264.RefPicMarking.Instruction(nVideo.Codecs.H264.RefPicMarking.InstrType.CONVERT_INTO_LONG, CAVLCReader.readUE(inb, "SH: difference_of_pic_nums_minus1") + 1, CAVLCReader.readUE(inb, "SH: long_term_frame_idx")); break; case 4: inbstr = new nVideo.Codecs.H264.RefPicMarking.Instruction(nVideo.Codecs.H264.RefPicMarking.InstrType.TRUNK_LONG, CAVLCReader.readUE(inb, "SH: max_long_term_frame_idx_plus1") - 1, 0); break; case 5: inbstr = new nVideo.Codecs.H264.RefPicMarking.Instruction(nVideo.Codecs.H264.RefPicMarking.InstrType.CLEAR, 0, 0); break; case 6: inbstr = new nVideo.Codecs.H264.RefPicMarking.Instruction(nVideo.Codecs.H264.RefPicMarking.InstrType.MARK_LONG, CAVLCReader.readUE(inb, "SH: long_term_frame_idx"), 0); break; } if (inbstr != null) { mmops.Add(inbstr); } } while (memory_management_control_operation != 0); sh.refPicMarkingNonIDR = new RefPicMarking(mmops.ToArray()); } } }