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());
}
}
}
