public bool TryDecode()
{
int skip = 4;
switch (adaptation_field_control)
{
case 0x0: // reserved for future use by ISO/IEC
return(false);
case 0x1: // 无调整字段，仅含有效负载
skip = 4 + payload_unit_start_indicator;
break;
case 0x2: // 仅含调整字段，无有效负载
skip = SrcBuffer.Length;
break;
case 0x3: // 调整字段后含有效负载
AdaptationField = new AdaptationInfo();
AdaptationField.SetBytes(SrcBuffer);
skip = 4 + AdaptationField.adaptation_field_length + 1;
break;
default:
break;
}
return(true);
}
public void Decode()
{
//以下是整个程序的逻辑主要是以解析为主，实际应用可能要优化下方式以提高性能
var buffer = SrcBuffer;
int skip = 4;
switch (adaptation_field_control)
{
case 0x0: // reserved for future use by ISO/IEC
throw new Exception();
case 0x1: // 无调整字段，仅含有效负载
skip = 4 + payload_unit_start_indicator;
skip = 4; //
break;
case 0x2: // 仅含调整字段，无有效负载
skip = SrcBuffer.Length;
break;
case 0x3: // 调整字段后含有效负载
AdaptationField = new AdaptationInfo();
AdaptationField.SetBytes(SrcBuffer);
skip = 4 + AdaptationField.adaptation_field_length + 1;
break;
default:
break;
}
data = new byte[SrcBuffer.Length - skip];
if (data.Length > 0)
{
Array.Copy(SrcBuffer, skip, data, 0, data.Length);
}
if (PID == 0x00)
{
PacketType = TSPacketType.PAT;
var pat = new TS_PAT();
pat.SetBytes(data);
foreach (var p in pat.PATProgramList)
{
ProgramManage.AddProgram(p);
}
_pat = pat;
}
else
{
if (ProgramManage.IsPMT_PID(PID))
{
//PMT
PacketType = TSPacketType.PMT;
var pmt = new TS_PMT();
pmt.SetBytes(data);
foreach (var p in pmt.PMTStreamList)
{
ProgramManage.AddStream(p);
}
_pmt = pmt;
}
else if (ProgramManage.IsTSTable(PID))
{
PacketType = TSPacketType.OTHER;
//其他表示，这里先不作处理
}
else if (ProgramManage.IsData(PID))
{
//这里一般为 媒体数据
PacketType = TSPacketType.DATA;
}
}
}