public H264Slice(EltH264Nalu nalu, H264Decoder decoder)
: base(nalu)
{
switch (nalu.NaluType)
{
case NalUnitType.NAL_UNIT_CODED_SLICE:
case NalUnitType.NAL_UNIT_AUX_CODED_SLICE:
case NalUnitType.NAL_UNIT_CODED_SLICE_DATAPART_A:
case NalUnitType.NAL_UNIT_CODED_SLICE_DATAPART_B:
case NalUnitType.NAL_UNIT_CODED_SLICE_DATAPART_C:
case NalUnitType.NAL_UNIT_CODED_SLICE_IDR:
case NalUnitType.NAL_UNIT_CODED_SLICE_SCALABLE:
break;
default:
throw new NotImplementedException();
}
EltSyntax eltSyntax;
eltSyntax = nalu.FindSyntax("pic_parameter_set_id");
Debug.Assert(eltSyntax != null);
m_PicParamSetId = (UInt32)eltSyntax.Value;
m_PicParamSet = decoder.FindPicParamSet(m_PicParamSetId);
Debug.Assert(m_PicParamSet != null);
m_SeqParamSet = m_PicParamSet.SeqParamSet;
Debug.Assert(m_SeqParamSet != null);
m_Macroblocs = new Dictionary <UInt32, Macroblock>();
ExplodeMacroblocs(nalu);
}
public H264SeqParamSet(EltH264Nalu nalu)
: base(nalu)
{
EltSyntax eltSyntax;
Debug.Assert(nalu.NaluType == NalUnitType.NAL_UNIT_SPS || nalu.NaluType == NalUnitType.NAL_UNIT_SUBSET_SPS);
eltSyntax = nalu.FindSyntax("seq_parameter_set_id");
Debug.Assert(eltSyntax != null);
m_Id = (UInt32)eltSyntax.Value;
eltSyntax = nalu.FindSyntax("pic_width_in_mbs_minus1");
Debug.Assert(eltSyntax != null);
m_Width = ((UInt32)eltSyntax.Value << 4) + 16;
eltSyntax = nalu.FindSyntax("pic_height_in_map_units_minus1");
Debug.Assert(eltSyntax != null);
m_Height = ((UInt32)eltSyntax.Value << 4) + 16;
m_SizeInMbs = (m_Width * m_Height) >> 8;
}
public H264PicParamSet(EltH264Nalu nalu, H264Decoder decoder)
: base(nalu)
{
EltSyntax eltSyntax;
Debug.Assert(nalu.NaluType == NalUnitType.NAL_UNIT_PPS);
eltSyntax = nalu.FindSyntax("pic_parameter_set_id");
Debug.Assert(eltSyntax != null);
m_Id = (UInt32)eltSyntax.Value;
eltSyntax = nalu.FindSyntax("seq_parameter_set_id");
Debug.Assert(eltSyntax != null);
m_SeqParamSetId = (UInt32)eltSyntax.Value;
eltSyntax = nalu.FindSyntax("entropy_coding_mode_flag");
Debug.Assert(eltSyntax != null);
m_IsCAVLCEncoded = (eltSyntax.Value == 0);
m_SeqParamSet = decoder.FindSeqParamSet(nalu.LayerId, m_SeqParamSetId);
Debug.Assert(m_SeqParamSet != null);
}
public H264Nalu(EltH264Nalu nalu)
{
m_Nalu = nalu;
}
void DecoderH264_OnEvent(object sender, EltEventArgs e)
{
if (g_MainInstH264.Dispatcher.CheckAccess() == false)
{
g_MainInstH264.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.DataBind, (Action)(() => DecoderH264_OnEvent(sender, e)));
return;
}
Debug.Assert(e.Elt.Type == Elt.EltType_t.EltType_Section);
foreach (Elt elt in e.Elt.Elements)
{
switch (elt.Type)
{
case Elt.EltType_t.EltType_Nalu:
{
EltH264Nalu nalu = (elt as EltH264Nalu);
switch (nalu.NaluType)
{
case NalUnitType.NAL_UNIT_SPS:
case NalUnitType.NAL_UNIT_SUBSET_SPS:
{
AddSeqParamSet(new H264SeqParamSet(nalu));
break;
}
case NalUnitType.NAL_UNIT_PPS:
{
AddPicParamSet(new H264PicParamSet(nalu, this));
break;
}
case NalUnitType.NAL_UNIT_CODED_SLICE:
case NalUnitType.NAL_UNIT_CODED_SLICE_IDR:
case NalUnitType.NAL_UNIT_CODED_SLICE_SCALABLE:
{
H264Slice slice = new H264Slice(nalu, this);
Debug.Assert(slice != null);
H264Picture picture = FindPicture(nalu.LayerId, nalu.PictureId) as H264Picture;
if (picture == null)
{
picture = new H264Picture(nalu.LayerId, nalu.PictureId, slice.PicParamSet, slice.SeqParamSet);
}
bool wasComplete = picture.IsComplete;
picture.AddSlice(slice);
AddPicture(picture, wasComplete);
break;
}
case NalUnitType.NAL_UNIT_ACCESS_UNIT_DELIMITER:
{
break;
}
}
break;
}
}
}
if (OnEvent != null)
{
EventHandlerTrigger.TriggerEvent <EltEventArgs>(OnEvent, this, e);
}
}
