/**
* Sends instrumentation tap event to all registered listeners
*/
private void sendTapEvent(RadioLog.Common.SafeBitArray bitset, Shift shift, bool decision)
{
foreach (IListener <SymbolEvent> tap in mDecoder.GetListeners())
{
SymbolEvent sEvent = new SymbolEvent(bitset.CloneFromIndexToIndex(0, mSymbolLength), mSymbolLength, decision, shift);
tap.Receive(sEvent);
}
}
public static RadioLog.Common.SafeBitArray interleave(RadioLog.Common.SafeBitArray message, int start, int end)
{
RadioLog.Common.SafeBitArray original = message.CloneFromIndexToIndex(start, end);
/* Clear block bits in source message */
message.ClearRange(start, end);
/* Iterate only the set bits in the original message and apply
* the deinterleave -- we don't have to evaluate the 0 bits */
for (int i = original.nextSetBit(0);
i >= 0 && i < INTERLEAVE.Length;
i = original.nextSetBit(i + 1))
{
message.SetBit(start + INTERLEAVE[i]);
}
return(message);
}
private CRC detectAndCorrect(int start, int end)
{
RadioLog.Common.SafeBitArray original = mMessage.CloneFromIndexToIndex(start, end);
CRC retVal = CRCFleetsync.check(original);
//Attempt to correct single-bit errors
if (retVal == CRC.FAILED_PARITY)
{
int[] errorBitPositions = CRCFleetsync.findBitErrors(original);
if (errorBitPositions != null)
{
foreach (int errorBitPosition in errorBitPositions)
{
mMessage.flip(start + errorBitPosition);
}
retVal = CRC.CORRECTED;
}
}
return(retVal);
}
private void checkComplete()
{
if (mDUID.Equals(Decoders.P25.Reference.DataUnitID.NID))
{
int value = mMessage.getInt(Decoders.P25.Message.P25Message.DUID);
Decoders.P25.Reference.DataUnitID duid = Decoders.P25.Reference.DataUnitID.fromValue(value);
if (duid != Decoders.P25.Reference.DataUnitID.UNKN)
{
setDUID(duid);
}
else
{
mComplete = true;
}
}
else if (mDUID.Equals(Decoders.P25.Reference.DataUnitID.HDU) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.LDU1) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.LDU2) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.PDU2) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.PDU3) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.TDU) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.TDULC) ||
mDUID.Equals(Decoders.P25.Reference.DataUnitID.UNKN))
{
mComplete = true;
mFramer.dispatch(new Decoders.P25.Message.P25Message(mMessage.Clone(), mDUID));
}
else if (mDUID.Equals(Decoders.P25.Reference.DataUnitID.PDU1))
{
int blocks = mMessage.getInt(Decoders.P25.Message.PDUMessage.PDU_HEADER_BLOCKS_TO_FOLLOW);
int padBlocks = mMessage.getInt(Decoders.P25.Message.PDUMessage.PDU_HEADER_PAD_BLOCKS);
int blockCount = blocks + padBlocks;
if (blockCount == 24 || blockCount == 32)
{
setDUID(Decoders.P25.Reference.DataUnitID.PDU2);
}
else if (blockCount == 36 || blockCount == 48)
{
setDUID(Decoders.P25.Reference.DataUnitID.PDU3);
}
else
{
mFramer.dispatch(new Decoders.P25.Message.PDUMessage(mMessage.Clone(), mDUID));
mComplete = true;
}
}
else if (mDUID.Equals(Decoders.P25.Reference.DataUnitID.TSBK1))
{
/* Remove interleaving */
Decoders.P25.P25Interleave.deinterleave(mMessage, TSBK_BEGIN, TSBK_END);
/* Remove trellis encoding */
mFramer.mHalfRate.decode(mMessage, TSBK_BEGIN, TSBK_END);
/* Construct the message */
int tsbkSystem1 = mMessage.getInt(Decoders.P25.Message.P25Message.NAC);
RadioLog.Common.SafeBitArray tsbkBuffer1 = new RadioLog.Common.SafeBitArray(mMessage.CloneFromIndexToIndex(TSBK_BEGIN, TSBK_DECODED_END), 96);
Decoders.P25.Message.TSBKMessage tsbkMessage1 = Decoders.P25.Message.TSBKMessageFactory.getMessage(tsbkSystem1, tsbkBuffer1);
if (tsbkMessage1.isLastBlock())
{
mComplete = true;
}
else
{
setDUID(Decoders.P25.Reference.DataUnitID.TSBK2);
mMessage.SetPointer(TSBK_BEGIN);
}
mFramer.dispatch(tsbkMessage1);
}
else if (mDUID.Equals(Decoders.P25.Reference.DataUnitID.TSBK2))
{
/* Remove interleaving */
Decoders.P25.P25Interleave.deinterleave(mMessage, TSBK_BEGIN, TSBK_END);
/* Remove trellis encoding */
mFramer.mHalfRate.decode(mMessage, TSBK_BEGIN, TSBK_END);
/* Construct the message */
int tsbkSystem2 = mMessage.getInt(Decoders.P25.Message.P25Message.NAC);
RadioLog.Common.SafeBitArray tsbkBuffer2 = new RadioLog.Common.SafeBitArray(mMessage.CloneFromIndexToIndex(TSBK_BEGIN, TSBK_DECODED_END), 98);
Decoders.P25.Message.TSBKMessage tsbkMessage2 = Decoders.P25.Message.TSBKMessageFactory.getMessage(tsbkSystem2, tsbkBuffer2);
if (tsbkMessage2.isLastBlock())
{
mComplete = true;
}
else
{
setDUID(Decoders.P25.Reference.DataUnitID.TSBK3);
mMessage.SetPointer(TSBK_BEGIN);
}
mFramer.dispatch(tsbkMessage2);
}
else if (mDUID.Equals(Decoders.P25.Reference.DataUnitID.TSBK3))
{
/* Remove interleaving */
Decoders.P25.P25Interleave.deinterleave(mMessage, TSBK_BEGIN, TSBK_END);
/* Remove trellis encoding */
mFramer.mHalfRate.decode(mMessage, TSBK_BEGIN, TSBK_END);
/* Construct the message */
int tsbkSystem3 = mMessage.getInt(Decoders.P25.Message.P25Message.NAC);
RadioLog.Common.SafeBitArray tsbkBuffer3 = new RadioLog.Common.SafeBitArray(mMessage.CloneFromIndexToIndex(TSBK_BEGIN, TSBK_DECODED_END), 96);
Decoders.P25.Message.TSBKMessage tsbkMessage3 = Decoders.P25.Message.TSBKMessageFactory.getMessage(tsbkSystem3, tsbkBuffer3);
mComplete = true;
mFramer.dispatch(tsbkMessage3);
}
else
{
mComplete = true;
}
}