public LJ1200Decoder(AliasList aliasList) {
mDecimationFilter =
new HalfBandFilter_RB_RB(
Filters.FIR_HALF_BAND_31T_ONE_EIGHTH_FCO.getCoefficients(), 1.0f, true);
mBandPassFilter =
new RealFIRFilter_RB_RB(Filters.FIRBP_1200FSK_24000FS.getCoefficients(), 1.02f);
mDecimationFilter.setListener(mBandPassFilter);
mFSKDecoder = new FSK2Decoder(DECIMATED_SAMPLE_RATE, SYMBOL_RATE, Output.INVERTED);
mBandPassFilter.setListener(mFSKDecoder);
mFSKDecoder.setListener(mFSKDecoderBroadcaster);
mTowerMessageFramer = new MessageFramer(SyncPattern.LJ1200.getPattern(), MESSAGE_LENGTH);
mTransponderMessageFramer =
new MessageFramer(SyncPattern.LJ1200_TRANSPONDER.getPattern(), MESSAGE_LENGTH);
mFSKDecoderBroadcaster.addListener(mTowerMessageFramer);
mFSKDecoderBroadcaster.addListener(mTransponderMessageFramer);
mMessageProcessor = new LJ1200MessageProcessor(aliasList);
mTowerMessageFramer.addMessageListener(mMessageProcessor);
mTransponderMessageFramer.addMessageListener(mMessageProcessor);
mMessageProcessor.setMessageListener(this);
}
@Override
public void unregisterTap(Tap tap) {
mFSKDecoder.unregisterTap(tap);
switch (tap.getName()) {
case INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD:
mBandPassFilter.setListener(mFSKDecoder);
break;
case INSTRUMENT_FSK2_DECODER_TO_MESSAGE_FRAMER:
mFSKDecoder.setListener(mTowerMessageFramer);
break;
}
}
@Override
public void registerTap(Tap tap) {
mFSKDecoder.registerTap(tap);
switch (tap.getName()) {
case INSTRUMENT_BANDPASS_FILTER_TO_FSK2_DEMOD:
FloatBufferTap bpTap = (FloatBufferTap) tap;
mBandPassFilter.setListener(bpTap);
bpTap.setListener(mFSKDecoder);
break;
case INSTRUMENT_FSK2_DECODER_TO_MESSAGE_FRAMER:
BinaryTap decoderTap = (BinaryTap) tap;
mFSKDecoder.setListener(decoderTap);
decoderTap.setListener(mTowerMessageFramer);
break;
}
}