////////////////////////////////////////////////////////////////////////////
///
/// De-packetize incoming data and pass it to the elementary stream handler.
///
/// \return Collator status code, CollatorNoError indicates success.
///
CollatorStatus_t Collator_PesAudio_c::Input(PlayerInputDescriptor_t *Input,
unsigned int DataLength,
void *Data,
bool NonBlocking,
unsigned int *DataLengthRemaining)
{
CollatorStatus_t Status;
//
st_relayfs_write(ST_RELAY_TYPE_PES_AUDIO_BUFFER, ST_RELAY_SOURCE_AUDIO_COLLATOR, (unsigned char *)Data, DataLength, 0);
COLLATOR_ASSERT(!NonBlocking);
AssertComponentState("Collator_PesAudio_c::Input", ComponentRunning);
InputEntry(Input, DataLength, Data, NonBlocking);
ActOnInputDescriptor(Input);
//
// Copy our arguments to class members so the utility functions can
// act upon it.
//
RemainingData = (unsigned char *)Data;
RemainingLength = DataLength;
//
// Continually handle units of input until all input is exhausted (or an error occurs).
//
// Be aware that our helper functions may, during their execution, cause state changes
// that result in a different branch being taken next time round the loop.
//
Status = CollatorNoError;
while (Status == CollatorNoError && RemainingLength != 0)
{
//COLLATOR_DEBUG("De-PESing loop has %d bytes remaining\n", RemainingLength);
//report_dump_hex( severity_note, RemainingData, min(RemainingLength, 188), 32, 0);
if (SeekingPesHeader)
{
//
// Try to lock to incoming PES headers
//
Status = SearchForPesHeader();
}
else if (GotPartialPesHeader)
{
//
// Read in the remains of the PES header
//
Status = ReadPartialPesHeader();
}
else
{
//
// Send the PES packet for frame level analysis
//
Status = ReadPesPacket();
}
}
if (Status != CollatorNoError)
{
// if anything when wrong then we need to resynchronize
COLLATOR_DEBUG("General failure; seeking new PES header\n");
DiscardAccumulatedData();
SeekingPesHeader = true;
}
InputExit();
return Status;
}
////////////////////////////////////////////////////////////////////////////
///
/// Accumulate incoming data until we have the full PES header.
///
/// Strictly speaking this method handles two sub-states. In the first state
/// we do not have sufficient data accumulated to determine how long the PES
/// header is. In the second we still don't have a complete PES packet but
/// at least we know how much more data we need.
///
/// This code assumes that PES packet uses >=9 bytes PES headers rather than
/// the 6 byte headers found in the program stream map, padding stream,
/// private stream 2, etc.
///
/// \return Collator status code, CollatorNoError indicates success.
///
CollatorStatus_t Collator_PesAudio_c::ReadPartialPesHeader(void)
{
CollatorStatus_t Status;
unsigned int PesHeaderBytes, BytesNeeded, BytesToRead;
unsigned char PesPrivateData[MAX_PES_PRIVATE_DATA_LENGTH];
//
if (GotPartialPesHeaderBytes < PES_INITIAL_HEADER_SIZE)
{
COLLATOR_DEBUG("Waiting for first part of PES header\n");
StoredPesHeader = BufferBase + AccumulatedDataSize - GotPartialPesHeaderBytes;
BytesToRead = min(RemainingLength, PES_INITIAL_HEADER_SIZE - GotPartialPesHeaderBytes);
Status = AccumulateData(BytesToRead, RemainingData);
if (Status == CollatorNoError)
{
GotPartialPesHeaderBytes += BytesToRead;
RemainingData += BytesToRead;
RemainingLength -= BytesToRead;
}
else
{
COLLATOR_DEBUG("Cannot accumulate data #6 (%d)\n", Status);
}
return Status;
}
//
// We now have accumulated sufficient data to know how long the PES header actually is!
//
// pass the stream_id field to the collator sub-class (might update Configuration.ExtendedHeaderLength)
SetPesPrivateDataLength(StoredPesHeader[3]);
PesHeaderBytes = PES_INITIAL_HEADER_SIZE + StoredPesHeader[8] + Configuration.ExtendedHeaderLength;
BytesNeeded = PesHeaderBytes - GotPartialPesHeaderBytes;
BytesToRead = min(RemainingLength, BytesNeeded);
Status = AccumulateData(BytesToRead, RemainingData);
if (Status == CollatorNoError)
{
GotPartialPesHeaderBytes += BytesToRead;
RemainingData += BytesToRead;
RemainingLength -= BytesToRead;
COLLATOR_DEBUG("BytesNeeded %d; BytesToRead %d\n", BytesNeeded, BytesToRead);
if (BytesNeeded == BytesToRead)
{
//
// Woo hoo! We've got the whole header, examine it and change state
//
COLLATOR_DEBUG("Got entire PES header\n");
//report_dump_hex( severity_note, StoredPesHeader, PesHeaderBytes, 32, 0);
Status = CollatorNoError; // strictly speaking this is a no-op but the code might change
if (StoredPesHeader[0] != 0x00 || StoredPesHeader[1] != 0x00 || StoredPesHeader[2] != 0x01 ||
CollatorNoError != (Status = ReadPesHeader()))
{
COLLATOR_DEBUG("%s; seeking new PES header",
(Status == CollatorNoError ? "Start code not where expected" :
"Badly formed PES header"));
SeekingPesHeader = true;
DiscardAccumulatedData();
// we have contained the error by changing states...
return CollatorNoError;
}
//
// Placeholder: Generic stream id based PES filtering (configured by sub-class) could be inserted
// here (set DiscardPesPacket to true to discard).
//
if (Configuration.ExtendedHeaderLength)
{
// store a pointer to the PES private header. it is located just above the end of the
// accumulated data and is will be safely accumulated providing the private header is
// smaller than the rest of the PES packet. if a very large PES private header is
// encountered we will need to introduce a temporary buffer to store the header in.
if (Configuration.ExtendedHeaderLength <= MAX_PES_PRIVATE_DATA_LENGTH)
{
memcpy(PesPrivateData, BufferBase + AccumulatedDataSize - Configuration.ExtendedHeaderLength, Configuration.ExtendedHeaderLength);
}
else
{
COLLATOR_ERROR("Implementation error: Pes Private data area too big for temporay buffer\n");
}
Status = HandlePesPrivateData(PesPrivateData);
if (Status != CollatorNoError)
{
COLLATOR_ERROR("Unhandled error when parsing PES private data\n");
return (Status);
}
}
// discard the actual PES packet from the accumulate buffer
AccumulatedDataSize -= PesHeaderBytes;
// record the number of bytes we need to ignore before we reach the next start code
PesPayloadRemaining = PesPayloadLength;
// switch states and absorb the packet
COLLATOR_DEBUG("Discovered PES packet (header %d bytes, payload %d bytes)\n",
PesPacketLength - PesPayloadLength + 6, PesPayloadLength);
GotPartialPesHeader = false;
if (PassPesPrivateDataToElementaryStreamHandler && Configuration.ExtendedHeaderLength)
{
// update PesPacketLength (to ensure that GetOffsetIntoPacket gives the correct value)
PesPayloadLength += Configuration.ExtendedHeaderLength;
Status = HandleElementaryStream(Configuration.ExtendedHeaderLength, PesPrivateData);
if (Status != CollatorNoError)
{
COLLATOR_ERROR("Failed not accumulate the PES private data area\n");
}
}
}
}
else
{
COLLATOR_DEBUG("Cannot accumulate data #7 (%d)\n", Status);
}
return Status;
}
////////////////////////////////////////////////////////////////////////////
///
/// Handle a block of data that is not frame aligned.
///
/// There may be the end of a frame, whole frames, the start of a frame or even just
/// the middle of the frame.
///
/// If we have incomplete blocks we build up a complete one in the saved data,
/// in order to process we need to acquire a frame plus the next header (for sync check)
/// we can end up with the save buffer having a frame + part of a header, and a secondary
/// save with just part of a header.
///
/// \return Collator status code, CollatorNoError indicates success.
///
CollatorStatus_t Collator_PesAudio_c::HandleElementaryStream(unsigned int Length, unsigned char *Data)
{
CollatorStatus_t Status;
//
if (DiscardPesPacket)
{
COLLATOR_DEBUG("Discarding %d bytes of elementary stream\n", Length);
return CodecNoError;
}
//
// Copy our arguments to class members so the utility functions can
// act upon it.
//
RemainingElementaryOrigin = Data;
RemainingElementaryData = Data;
RemainingElementaryLength = Length;
//
// Continually handle units of input until all input is exhausted (or an error occurs).
//
// Be aware that our helper functions may, during their execution, cause state changes
// that result in a different branch being taken next time round the loop.
//
Status = CollatorNoError;
while (Status == CollatorNoError && RemainingElementaryLength != 0)
{
COLLATOR_DEBUG("ES loop has %d bytes remaining\n", RemainingElementaryLength);
//report_dump_hex( severity_note, RemainingElementaryData, min(RemainingElementaryLength, 188), 32, 0);
switch (CollatorState)
{
case SeekingSyncWord:
//
// Try to lock to incoming frame headers
//
Status = SearchForSyncWord();
break;
case GotSynchronized:
case SeekingFrameEnd:
//
// Read in the remains of the frame header
//
Status = ReadPartialFrameHeader();
break;
case ReadSubFrame:
case SkipSubFrame:
//
// Squirrel away the frame
//
Status = ReadFrame();
break;
case GotCompleteFrame:
//
// Pass the accumulated subframes to the frame parser
//
InternalFrameFlush();
CollatorState = ReadSubFrame;
break;
default:
// should not occur...
COLLATOR_DEBUG("General failure; wrong collator state");
Status = CollatorError;
break;
}
}
if (Status != CollatorNoError)
{
// if anything when wrong then we need to resynchronize
COLLATOR_DEBUG("General failure; seeking new synchronization sequence\n");
DiscardAccumulatedData();
CollatorState = SeekingSyncWord;
}
return Status;
}
////////////////////////////////////////////////////////////////////////////
///
/// Handle losing lock on the frame headers.
///
/// This function is called to handle the data that was spuriously accumulated
/// when the frame header was badly parsed.
///
/// In principle this function is quite simple. We allocate a new accumulation buffer and
/// use the currently accumulated data is the data source to run the elementary stream
/// state machine. There is however a little extra logic to get rid of recursion.
/// Specificially we change the error handling behaviour if this method is re-entered
/// so that there error is reported back to the already executing copy of the method.
///
/// \return Collator status code, CollatorNoError indicates success.
///
CollatorStatus_t Collator_PesAudio_c::HandleMissingNextFrameHeader(void)
{
CollatorStatus_t Status;
//
// Mark the collator as having lost frame lock.
// Yes! We really do want to do this before the re-entry checks.
//
CollatorState = SeekingSyncWord; // we really do want to do this before the re-entry checks
AccumulatedFrameReady = false;
//
// Check for re-entry
//
if (AlreadyHandlingMissingNextFrameHeader)
{
COLLATOR_DEBUG("Re-entered the error recovery handler, initiating stack unwind\n");
return CollatorUnwindStack;
}
//
// Check whether the sub-class wants trivial or aggressive error recovery
//
if (!ReprocessAccumulatedDataDuringErrorRecovery)
{
DiscardAccumulatedData();
return CollatorNoError;
}
//
// Remember the original elementary stream pointers for when we return to 'normal' processing.
//
unsigned char *OldRemainingElementaryOrigin = RemainingElementaryOrigin;
unsigned char *OldRemainingElementaryData = RemainingElementaryData;
unsigned int OldRemainingElementaryLength = RemainingElementaryLength;
//
// Take ownership of the already accumulated data
//
Buffer_t ReprocessingDataBuffer = CodedFrameBuffer;
unsigned char *ReprocessingData = BufferBase;
unsigned int ReprocessingDataLength = AccumulatedDataSize;
ReprocessingDataBuffer->SetUsedDataSize(ReprocessingDataLength);
Status = ReprocessingDataBuffer->ShrinkBuffer(max(ReprocessingDataLength, 1));
if (Status != BufferNoError)
{
COLLATOR_ERROR("Failed to shrink the reprocessing buffer to size (%08x).\n", Status);
// not fatal - we're merely wasting memory
}
// At the time of writing GetNewBuffer() doesn't check for leaks. This is good because otherwise
// we wouldn't have transfer the ownership of the ReprocessingDataBuffer by making this call.
Status = GetNewBuffer();
if (Status != CollatorNoError)
{
COLLATOR_ERROR("Cannot get new buffer during error recovery\n");
return CollatorError;
}
//
// Remember that we are re-processing the previously accumulated elementary stream
//
AlreadyHandlingMissingNextFrameHeader = true;
//
// WARNING: From this point on we own the ReprocessingDataBuffer, have set the recursion avoidance
// marker and may have damaged the RemainingElementaryData pointer. There should be no
// short-circuit exit paths used after this point otherwise we risk avoiding the clean up
// at the bottom of the method.
//
while (ReprocessingDataLength > 1)
{
//
// Remove the first byte from the recovery buffer (to avoid detecting again the same start code).
//
ReprocessingData += 1;
ReprocessingDataLength -= 1;
//
// Search for a start code in the reprocessing data. This allows us to throw away data that we
// know will never need reprocessing which makes the recursion avoidance code more efficient.
//
RemainingElementaryOrigin = ReprocessingData;
RemainingElementaryData = ReprocessingData;
RemainingElementaryLength = ReprocessingDataLength;
int CodeOffset;
PotentialFrameHeaderLength = 0; // ensure no (now voided) historic data is considered by sub-class
Status = FindNextSyncWord(&CodeOffset);
if (Status == CodecNoError)
{
COLLATOR_ASSERT(CodeOffset >= 0);
COLLATOR_DEBUG("Found start code during error recovery (byte %d of %d)\n",
CodeOffset, ReprocessingDataLength);
// We found a start code, snip off all preceding data
ReprocessingData += CodeOffset;
ReprocessingDataLength -= CodeOffset;
}
else
{
// We didn't find a start code, snip off everything except the last few bytes. This
// final fragment may contain a partial start code so we want to pass if through the
// elementary stream handler again.
unsigned FinalBytes = min(ReprocessingDataLength, FrameHeaderLength - 1);
COLLATOR_DEBUG("Found no start code during error recovery (processing final %d bytes of %d)\n",
ReprocessingDataLength, FinalBytes);
ReprocessingData += ReprocessingDataLength;
ReprocessingDataLength = FinalBytes;
ReprocessingData -= ReprocessingDataLength;
}
//
// Process the elementary stream
//
Status = HandleElementaryStream(ReprocessingDataLength, ReprocessingData);
if (CollatorNoError == Status)
{
COLLATOR_DEBUG("Error recovery completed, returning to normal processing\n");
// All data consumed and stored in the subsequent accumulation buffer
break; // Success will propagate when we return Status
}
else if (CollatorUnwindStack == Status)
{
COLLATOR_DEBUG("Stack unwound successfully, re-trying error recovery\n");
// We found a frame header but lost lock again... let's have another go
AccumulatedDataSize = 0; // make sure no accumulated data is carried round the loop
continue;
}
else
{
COLLATOR_ERROR("Error handling elementary stream during error recovery\n");
break; // Failure will propagate when we return Status
}
}
//
// Free the buffer we just consumed and restore the original elementary stream pointers
//
RemainingElementaryOrigin = OldRemainingElementaryOrigin;
RemainingElementaryData = OldRemainingElementaryData;
RemainingElementaryLength = OldRemainingElementaryLength;
(void) ReprocessingDataBuffer->DecrementReferenceCount(IdentifierCollator);
AlreadyHandlingMissingNextFrameHeader = false;
return Status;
}
//{{{ Input
////////////////////////////////////////////////////////////////////////////
///
/// Extract Frame length from Pes Private Data area if present.
///
/// \return Collator status code, CollatorNoError indicates success.
///
CollatorStatus_t Collator_PesFrame_c::Input(PlayerInputDescriptor_t *Input,
unsigned int DataLength,
void *Data,
bool NonBlocking,
unsigned int *DataLengthRemaining)
{
CollatorStatus_t Status = CollatorNoError;
bool PrivateDataPresent;
unsigned char *DataBlock = (unsigned char *)Data;
unsigned char *PesHeader;
unsigned char *PayloadStart;
unsigned int PayloadLength;
unsigned int PesLength;
unsigned int Offset;
COLLATOR_ASSERT(!NonBlocking);
AssertComponentState("Collator_PesFrame_c::Input", ComponentRunning);
InputEntry(Input, DataLength, Data, NonBlocking);
Offset = 0;
while (Offset < DataLength)
{
// Read the length of the payload
PrivateDataPresent = false;
PesHeader = DataBlock + Offset;
PesLength = (PesHeader[4] << 8) + PesHeader[5];
if (PesLength != 0)
PayloadLength = PesLength - PesHeader[8] - 3;
else
PayloadLength = 0;
COLLATOR_DEBUG("DataLength %d, PesLength %d; PayloadLength %d, Offset %d\n", DataLength, PesLength, PayloadLength, Offset);
Offset += PesLength + 6; // PES packet is PesLength + 6 bytes long
Bits.SetPointer(PesHeader + 9); // Set bits pointer ready to process optional fields
if ((PesHeader[7] & 0x80) == 0x80) // PTS present?
//{{{ read PTS
{
Bits.FlushUnseen(4);
PlaybackTime = (unsigned long long)(Bits.Get(3)) << 30;
Bits.FlushUnseen(1);
PlaybackTime |= Bits.Get(15) << 15;
Bits.FlushUnseen(1);
PlaybackTime |= Bits.Get(15);
Bits.FlushUnseen(1);
PlaybackTimeValid = true;
COLLATOR_DEBUG("PTS %llu.\n", PlaybackTime);
}
//}}}
if ((PesHeader[7] & 0xC0) == 0xC0) // DTS present?
//{{{ read DTS
{
Bits.FlushUnseen(4);
DecodeTime = (unsigned long long)(Bits.Get(3)) << 30;
Bits.FlushUnseen(1);
DecodeTime |= Bits.Get(15) << 15;
Bits.FlushUnseen(1);
DecodeTime |= Bits.Get(15);
Bits.FlushUnseen(1);
DecodeTimeValid = true;
}
//}}}
else if ((PesHeader[7] & 0xC0) == 0x40)
{
COLLATOR_ERROR("Malformed pes header contains DTS without PTS.\n");
DiscardAccumulatedData(); // throw away previous frame as incomplete
InputExit();
return CollatorError;
}
//}}}
//{{{ walk down optional bits
if ((PesHeader[7] & 0x20) == 0x20) // ESCR present
Bits.FlushUnseen(48); // Size of ESCR
if ((PesHeader[7] & 0x10) == 0x10) // ES Rate present
Bits.FlushUnseen(24); // Size of ES Rate
if ((PesHeader[7] & 0x08) == 0x08) // Trick mode control present
Bits.FlushUnseen(8); // Size of Trick mode control
if ((PesHeader[7] & 0x04) == 0x04) // Additional copy info present
Bits.FlushUnseen(8); // Size of additional copy info
if ((PesHeader[7] & 0x02) == 0x02) // PES CRC present
Bits.FlushUnseen(16); // Size of previous packet CRC
if ((PesHeader[7] & 0x01) == 0x01) // PES Extension flag
{
PrivateDataPresent = Bits.Get(1);
Bits.FlushUnseen(7); // Size of Pes extension data
}
//}}}
if (PrivateDataPresent)
{
if (RemainingDataLength != 0)
{
COLLATOR_ERROR("%s: Warning new frame indicated but %d bytes missing\n", __FUNCTION__, RemainingDataLength);
DiscardAccumulatedData(); // throw away previous frame as incomplete
}
FrameSize = Bits.Get(8) + (Bits.Get(8) << 8) + (Bits.Get(8) << 16);
RemainingDataLength = FrameSize;
COLLATOR_DEBUG("%s: PlaybackTimeValid %d, PlaybackTime %llx, FrameSize %d\n", __FUNCTION__, PlaybackTimeValid, PlaybackTime, FrameSize);
}
if ((int)PayloadLength > RemainingDataLength) // Too much data - have some packets been lost?
{
if (RemainingDataLength != 0)
{
COLLATOR_ERROR("%s: Warning packet contains more bytes than needed %d bytes missing?\n", __FUNCTION__, RemainingDataLength);
DiscardAccumulatedData(); // throw away previous frame as incomplete
//RemainingDataLength = 0;
//InputExit();
//return CollatorError;
}
RemainingDataLength = PayloadLength; // assume new packet is stand alone frame
}
AccumulateStartCode(PackStartCode(AccumulatedDataSize, 0x42));
PayloadStart = PesHeader + (PesLength + 6 - PayloadLength);
Status = AccumulateData(PayloadLength, (unsigned char *)PayloadStart);
if (Status != CollatorNoError)
{
InputExit();
return Status;
}
RemainingDataLength -= PayloadLength;
if (RemainingDataLength <= 0)
{
Status = InternalFrameFlush(); // flush out collected frame
if (Status != CollatorNoError)
{
InputExit();
return Status;
}
}
COLLATOR_DEBUG("%s PrivateDataPresent %d, RemainingDataLength %d, PayloadLength %d\n",
__FUNCTION__, PrivateDataPresent, RemainingDataLength, PayloadLength);
}
InputExit();
return CollatorNoError;
}
//}}}
//{{{ Input
////////////////////////////////////////////////////////////////////////////
///
/// Extract Frame length from Pes Private Data area if present.
///
/// \return Collator status code, CollatorNoError indicates success.
///
CollatorStatus_t Collator_PesVideoMjpeg_c::Input(PlayerInputDescriptor_t *Input,
unsigned int DataLength,
void *Data,
bool NonBlocking,
unsigned int *DataLengthRemaining)
{
CollatorStatus_t Status = CollatorNoError;
unsigned char *DataBlock = (unsigned char *)Data;
unsigned char *PesHeader;
unsigned int PesLength;
unsigned int PayloadLength;
unsigned int Offset;
unsigned int CodeOffset;
unsigned int Code;
AssertComponentState("Collator_PacketPes_c::Input", ComponentRunning);
COLLATOR_ASSERT(!NonBlocking);
InputEntry(Input, DataLength, Data, NonBlocking);
Offset = 0;
RemainingData = (unsigned char *)Data;
RemainingLength = DataLength;
TerminationFlagIsSet = false;
Offset = 0;
while (Offset < DataLength)
{
// Read the length of the payload
PesHeader = DataBlock + Offset;
PesLength = (PesHeader[4] << 8) + PesHeader[5];
if (PesLength != 0)
PayloadLength = PesLength - PesHeader[8] - 3;
else
PayloadLength = 0;
COLLATOR_DEBUG("DataLength %d, PesLength %d; PayloadLength %d, Offset %d\n", DataLength, PesLength, PayloadLength, Offset);
Offset += PesLength + 6; // PES packet is PesLength + 6 bytes long
Bits.SetPointer(PesHeader + 9); // Set bits pointer ready to process optional fields
if ((PesHeader[7] & 0x80) == 0x80) // PTS present?
//{{{ read PTS
{
Bits.FlushUnseen(4);
PlaybackTime = (unsigned long long)(Bits.Get(3)) << 30;
Bits.FlushUnseen(1);
PlaybackTime |= Bits.Get(15) << 15;
Bits.FlushUnseen(1);
PlaybackTime |= Bits.Get(15);
Bits.FlushUnseen(1);
PlaybackTimeValid = true;
COLLATOR_DEBUG("PTS %llu.\n", PlaybackTime);
}
//}}}
if ((PesHeader[7] & 0xC0) == 0xC0) // DTS present?
//{{{ read DTS
{
Bits.FlushUnseen(4);
DecodeTime = (unsigned long long)(Bits.Get(3)) << 30;
Bits.FlushUnseen(1);
DecodeTime |= Bits.Get(15) << 15;
Bits.FlushUnseen(1);
DecodeTime |= Bits.Get(15);
Bits.FlushUnseen(1);
DecodeTimeValid = true;
}
//}}}
else if ((PesHeader[7] & 0xC0) == 0x40)
{
COLLATOR_ERROR("Malformed pes header contains DTS without PTS.\n");
DiscardAccumulatedData(); // throw away previous frame as incomplete
InputExit();
return CollatorError;
}
RemainingData = PesHeader + (PesLength + 6 - PayloadLength);
RemainingLength = PayloadLength;
while (RemainingLength > 0)
{
Status = FindNextStartCode(&CodeOffset);
if (Status != CollatorNoError) // Error indicates no start code found
{
Status = AccumulateData(RemainingLength, RemainingData);
if (Status != CollatorNoError)
DiscardAccumulatedData();
RemainingLength = 0;
break;
}
// Got one accumulate up to and including it
Status = AccumulateData(CodeOffset + 2, RemainingData);
if (Status != CollatorNoError)
{
DiscardAccumulatedData();
break;
}
Code = RemainingData[CodeOffset + 1];
RemainingLength -= CodeOffset + 2;
RemainingData += CodeOffset + 2;
// Is it a block terminate code
if ((Code == Configuration.BlockTerminateCode) && (AccumulatedDataSize > 2))
{
AccumulatedDataSize -= 2;
Status = InternalFrameFlush((Configuration.StreamTerminateFlushesFrame && (Code == Configuration.StreamTerminationCode)));
if (Status != CollatorNoError)
break;
BufferBase[0] = 0xff;
BufferBase[1] = Code;
AccumulatedDataSize = 2;
}
// Accumulate the start code
Status = AccumulateStartCode(PackStartCode(AccumulatedDataSize - 2, Code));
if (Status != CollatorNoError)
{
DiscardAccumulatedData();
InputExit();
return Status;
}
}
}
InputExit();
return CollatorNoError;
}