public override void ProcessTsPacket(TsPacketMetadata tsPacketMetadata, byte[] packetBuffer, Int64 packetOffsetInBuffer)
{
//In search mode, we may need to skip several TS packets according to the request.
if (tsPacketMetadata.PacketNumber >= searchRequest.CountOfSkipTsPacket)
{
//Invoke the stream parser to process a TS packet.
streamDemux.ProcessTsPacket(tsPacketMetadata, packetBuffer, packetOffsetInBuffer);
}
}
public Result ProcessTsPacket(TsPacketMetadata tsPacketMetadata, byte[] packetBuffer, Int64 packetOffsetInBuffer)
{
Result result = new Result();
//Int64 dataLeftInBit = (Int64)tsPacketMetadata.PacketSize;
Int64 dataLeftInBit = (Int64)TsPacketSize.SIZE_188 * 8; //Important!!!!No matter 188 or 204 bytes, the valid data will always be 188 bytes.16 bytes are checksum that is not useful for parsing.
Int64 bitOffset = packetOffsetInBuffer * 8; //Key point to set the beginning offset!!!!!
//Important!!! Pass a copy of the TS packe to the demux module, so that it can assemble ts packet into section or PES packet.
streamDemux.ProcessTsPacket(tsPacketMetadata, packetBuffer, packetOffsetInBuffer);
if (result.Fine)
{
//8-bit sync_byte.
result = Utility.ByteArraySkipBits(ref dataLeftInBit, ref bitOffset, 8);
}
if (result.Fine)
{
//1-bit transport_error_indicator.
result = Utility.ByteArraySkipBits(ref dataLeftInBit, ref bitOffset, 1);
}
Int64 payloadUnitStartIndicator = 0;
if (result.Fine)
{
//1-bit payload_unit_start_indicator.
result = Utility.ByteArrayReadBits(packetBuffer, ref dataLeftInBit, ref bitOffset, 1, ref payloadUnitStartIndicator);
//GetContext().WriteLog(Utility.GetValueBinaryString(fieldValue, 1) + Environment.NewLine);
}
if (result.Fine)
{
//1-bit transport_priority.
result = Utility.ByteArraySkipBits(ref dataLeftInBit, ref bitOffset, 1);
}
Int64 pid = 0;
if (result.Fine)
{
//13-bit PID.
result = Utility.ByteArrayReadBits(packetBuffer, ref dataLeftInBit, ref bitOffset, 13, ref pid);
//GetContext().WriteLog(Utility.GetValueBinaryString(fieldValue, 13) + Environment.NewLine);
}
if (result.Fine)
{
//2-bit transport_scrambling_control.
result = Utility.ByteArraySkipBits(ref dataLeftInBit, ref bitOffset, 2);
}
Int64 adaptationFieldControl = 0;
if (result.Fine)
{
//2-bit adaptation_field_control.
result = Utility.ByteArrayReadBits(packetBuffer, ref dataLeftInBit, ref bitOffset, 2, ref adaptationFieldControl);
//GetContext().WriteLog(Utility.GetValueBinaryString(fieldValue, 2) + Environment.NewLine);
}
if (result.Fine)
{
//4-bit continuity_counter.
result = Utility.ByteArraySkipBits(ref dataLeftInBit, ref bitOffset, 4);
}
//To parse adaption fields.
Int64 adaptationFieldLength = 0;
if (result.Fine)
{
//If adaptationFieldControl is 0b10(Adaptation_field only, no payload) or 0b11(Adaptation_field followed by payload),there is a adaption_field. We need to skip the adaption fields.
if ((0x2 == adaptationFieldControl) || (0x3 == adaptationFieldControl))
{
//8-bit adaptation_field_length
result = Utility.ByteArrayReadBits(packetBuffer, ref dataLeftInBit, ref bitOffset, 8, ref adaptationFieldLength);
if (result.Fine)
{
/*Parse adaptation field to get PCR etc.*/
streamBitrateManager.ParseAdaptationField(tsPacketMetadata, (UInt16)pid, packetBuffer, result, dataLeftInBit, bitOffset, adaptationFieldControl);
}
//Skip adaption fields according to the adaption_field_length.
if (result.Fine)
{
result = Utility.ByteArraySkipBits(ref dataLeftInBit, ref bitOffset, (adaptationFieldLength * 8));
}
}
}
if (result.Fine)
{
//Notify a new packet to PidManager so that it can do the statistics.
pidManager.AddPacket((UInt16)pid);
}
return(result);
}
