bool LocalRxBase::initialize(void)
{
if (!Rx::initialize())
{
return false;
}
bool deemphasis = false;
cfg.getValue(name(), "DEEMPHASIS", deemphasis);
int delay_line_len = 0;
bool mute_1750 = false;
if (cfg.getValue(name(), "1750_MUTING", mute_1750))
{
delay_line_len = max(delay_line_len, TONE_1750_MUTING_PRE);
}
cfg.getValue(name(), "SQL_TAIL_ELIM", sql_tail_elim);
if (sql_tail_elim > 0)
{
delay_line_len = max(delay_line_len, sql_tail_elim);
}
cfg.getValue(name(), "PREAMP", preamp_gain);
bool peak_meter = false;
cfg.getValue(name(), "PEAK_METER", peak_meter);
// Get the audio source object
AudioSource *prev_src = audioSource();
assert(prev_src != 0);
// Create a fifo buffer to handle large audio blocks
input_fifo = new AudioFifo(1024);
// input_fifo->setOverwrite(true);
prev_src->registerSink(input_fifo);
prev_src = input_fifo;
SvxLink::SepPair<string, uint16_t> raw_audio_fwd_dest;
if (cfg.getValue(name(), "RAW_AUDIO_UDP_DEST", raw_audio_fwd_dest))
{
AudioSplitter *raw_audio_splitter = new AudioSplitter;
prev_src->registerSink(raw_audio_splitter, true);
AudioPassthrough *pass = new AudioPassthrough;
raw_audio_splitter->addSink(pass, true);
prev_src = pass;
AudioUdpSink *udp = new AudioUdpSink(IpAddress(raw_audio_fwd_dest.first),
raw_audio_fwd_dest.second);
if (!udp->initOk())
{
cerr << "*** ERROR: Could not open UDP socket for raw audio output\n";
return false;
}
raw_audio_splitter->addSink(udp, true);
}
// If a preamp was configured, create it
if (preamp_gain != 0)
{
AudioAmp *preamp = new AudioAmp;
preamp->setGain(preamp_gain);
prev_src->registerSink(preamp, true);
prev_src = preamp;
}
// If a peak meter was configured, create it
if (peak_meter)
{
PeakMeter *peak_meter = new PeakMeter(name());
prev_src->registerSink(peak_meter, true);
prev_src = peak_meter;
}
// If the sound card sample rate is higher than 16kHz (48kHz assumed),
// decimate it down to 16kHz
if (audioSampleRate() > 16000)
{
AudioDecimator *d1 = new AudioDecimator(3, coeff_48_16_wide,
coeff_48_16_wide_taps);
prev_src->registerSink(d1, true);
prev_src = d1;
}
AudioSplitter *siglevdet_splitter = 0;
siglevdet_splitter = new AudioSplitter;
prev_src->registerSink(siglevdet_splitter, true);
// Create the signal level detector
siglevdet = SigLevDetFactoryBase::createNamedSigLevDet(cfg, name());
if ((siglevdet == 0) ||
(!siglevdet->initialize(cfg, name(), INTERNAL_SAMPLE_RATE)))
{
cout << "*** ERROR: Could not initialize the signal level detector for "
<< "receiver " << name() << endl;
delete siglevdet;
siglevdet = 0;
return false;
}
siglevdet->setIntegrationTime(0);
siglevdet->signalLevelUpdated.connect(
mem_fun(*this, &LocalRxBase::onSignalLevelUpdated));
siglevdet_splitter->addSink(siglevdet, true);
// Create a mute valve
mute_valve = new AudioValve;
mute_valve->setOpen(true);
siglevdet_splitter->addSink(mute_valve, true);
prev_src = mute_valve;
#if (INTERNAL_SAMPLE_RATE != 16000)
// If the sound card sample rate is higher than 8kHz (16 or 48kHz assumed)
// decimate it down to 8kHz.
// 16kHz audio to other consumers.
if (audioSampleRate() > 8000)
{
AudioDecimator *d2 = new AudioDecimator(2, coeff_16_8, coeff_16_8_taps);
prev_src->registerSink(d2, true);
prev_src = d2;
}
#endif
// If a deemphasis filter was configured, create it
if (deemphasis)
{
//AudioFilter *deemph_filt = new AudioFilter("LpBu1/300");
//AudioFilter *deemph_filt = new AudioFilter("HsBq1/0.01/-18/3500");
//AudioFilter *deemph_filt = new AudioFilter("HsBq1/0.05/-36/3500");
//deemph_filt->setOutputGain(9.0f);
//AudioFilter *deemph_filt = new AudioFilter("HpBu1/50 x LpBu1/150");
//deemph_filt->setOutputGain(7.0f);
DeemphasisFilter *deemph_filt = new DeemphasisFilter;
prev_src->registerSink(deemph_filt, true);
prev_src = deemph_filt;
}
// Create a splitter to distribute full bandwidth audio to all consumers
AudioSplitter *fullband_splitter = new AudioSplitter;
prev_src->registerSink(fullband_splitter, true);
prev_src = fullband_splitter;
// Create the configured squelch detector and initialize it
string sql_det_str;
if (!cfg.getValue(name(), "SQL_DET", sql_det_str))
{
cerr << "*** ERROR: Config variable " << name() << "/SQL_DET not set\n";
return false;
}
if (sql_det_str == "OPEN")
{
squelch_det = new SquelchOpen;
}
else if (sql_det_str == "VOX")
{
squelch_det = new SquelchVox;
}
else if (sql_det_str == "CTCSS")
{
SquelchCtcss *squelch_ctcss = new SquelchCtcss;
squelch_ctcss->snrUpdated.connect(ctcssSnrUpdated.make_slot());
squelch_det = squelch_ctcss;
}
else if (sql_det_str == "SERIAL")
{
squelch_det = new SquelchSerial;
}
else if (sql_det_str == "SIGLEV")
{
squelch_det = new SquelchSigLev(siglevdet);
}
else if (sql_det_str == "EVDEV")
{
squelch_det = new SquelchEvDev;
}
else if (sql_det_str == "GPIO")
{
squelch_det = new SquelchGpio;
}
else if (sql_det_str == "PTY")
{
squelch_det = new SquelchPty;
}
#ifdef HAS_HIDRAW_SUPPORT
else if (sql_det_str == "HIDRAW")
{
squelch_det = new SquelchHidraw;
}
#endif
else
{
cerr << "*** ERROR: Unknown squelch type specified in config variable "
<< name() << "/SQL_DET. Legal values are: OPEN, VOX, CTCSS, SIGLEV, "
<< "EVDEV, GPIO, PTY and SERIAL\n";
// FIXME: Cleanup
return false;
}
if (!squelch_det->initialize(cfg, name()))
{
cerr << "*** ERROR: Squelch detector initialization failed for RX \""
<< name() << "\"\n";
delete squelch_det;
squelch_det = 0;
// FIXME: Cleanup
return false;
}
readyStateChanged.connect(mem_fun(*this, &LocalRxBase::rxReadyStateChanged));
if (cfg.getValue(name(), "SQL_HANGTIME", sql_hangtime))
{
squelch_det->setHangtime(sql_hangtime);
}
cfg.getValue(name(), "SQL_EXTENDED_HANGTIME", sql_extended_hangtime);
cfg.getValue(name(), "SQL_EXTENDED_HANGTIME_THRESH",
sql_extended_hangtime_thresh);
squelch_det->squelchOpen.connect(mem_fun(*this, &LocalRxBase::onSquelchOpen));
fullband_splitter->addSink(squelch_det, true);
// Create a new audio splitter to handle tone detectors
tone_dets = new AudioSplitter;
prev_src->registerSink(tone_dets, true);
prev_src = tone_dets;
// Filter out the voice band, removing high- and subaudible frequencies,
// for example CTCSS.
#if (INTERNAL_SAMPLE_RATE == 16000)
AudioFilter *voiceband_filter = new AudioFilter("BpCh10/-0.1/300-5000");
#else
AudioFilter *voiceband_filter = new AudioFilter("BpCh10/-0.1/300-3500");
#endif
prev_src->registerSink(voiceband_filter, true);
prev_src = voiceband_filter;
// Create an audio splitter to distribute the voiceband audio to all
// other consumers
AudioSplitter *voiceband_splitter = new AudioSplitter;
prev_src->registerSink(voiceband_splitter, true);
prev_src = voiceband_splitter;
// Create the configured type of DTMF decoder and add it to the splitter
string dtmf_dec_type("NONE");
cfg.getValue(name(), "DTMF_DEC_TYPE", dtmf_dec_type);
if (dtmf_dec_type != "NONE")
{
DtmfDecoder *dtmf_dec = DtmfDecoder::create(cfg, name());
if ((dtmf_dec == 0) || !dtmf_dec->initialize())
{
// FIXME: Cleanup?
delete dtmf_dec;
return false;
}
dtmf_dec->digitActivated.connect(
mem_fun(*this, &LocalRxBase::dtmfDigitActivated));
dtmf_dec->digitDeactivated.connect(
mem_fun(*this, &LocalRxBase::dtmfDigitDeactivated));
voiceband_splitter->addSink(dtmf_dec, true);
bool dtmf_muting = false;
cfg.getValue(name(), "DTMF_MUTING", dtmf_muting);
if (dtmf_muting)
{
dtmf_muting_pre = dtmf_dec->detectionTime();
delay_line_len = max(delay_line_len, dtmf_muting_pre);
}
}
// Create a selective multiple tone detector object
string sel5_dec_type("NONE");
cfg.getValue(name(), "SEL5_DEC_TYPE", sel5_dec_type);
if (sel5_dec_type != "NONE")
{
Sel5Decoder *sel5_dec = Sel5Decoder::create(cfg, name());
if (sel5_dec == 0 || !sel5_dec->initialize())
{
cerr << "*** ERROR: Sel5 decoder initialization failed for RX \""
<< name() << "\"\n";
return false;
}
sel5_dec->sequenceDetected.connect(
mem_fun(*this, &LocalRxBase::sel5Detected));
voiceband_splitter->addSink(sel5_dec, true);
}
// Create an audio valve to use as squelch and connect it to the splitter
sql_valve = new AudioValve;
sql_valve->setOpen(false);
prev_src->registerSink(sql_valve, true);
prev_src = sql_valve;
// Create the state detector
AudioStreamStateDetector *state_det = new AudioStreamStateDetector;
state_det->sigStreamStateChanged.connect(
mem_fun(*this, &LocalRxBase::audioStreamStateChange));
prev_src->registerSink(state_det, true);
prev_src = state_det;
// If we need a delay line (e.g. for DTMF muting and/or squelch tail
// elimination), create it
if (delay_line_len > 0)
{
delay = new AudioDelayLine(delay_line_len);
prev_src->registerSink(delay, true);
prev_src = delay;
}
// Add a limiter to smoothly limiting the audio before hard clipping it
AudioCompressor *limit = new AudioCompressor;
limit->setThreshold(-1);
limit->setRatio(0.1);
limit->setAttack(2);
limit->setDecay(20);
limit->setOutputGain(1);
prev_src->registerSink(limit, true);
prev_src = limit;
// Clip audio to limit its amplitude
AudioClipper *clipper = new AudioClipper;
clipper->setClipLevel(0.98);
prev_src->registerSink(clipper, true);
prev_src = clipper;
// Remove high frequencies generated by the previous clipping
#if (INTERNAL_SAMPLE_RATE == 16000)
AudioFilter *splatter_filter = new AudioFilter("LpCh9/-0.05/5000");
#else
AudioFilter *splatter_filter = new AudioFilter("LpCh9/-0.05/3500");
#endif
prev_src->registerSink(splatter_filter, true);
prev_src = splatter_filter;
// Set the previous audio pipe object to handle audio distribution for
// the LocalRxBase class
setHandler(prev_src);
// Open the audio device for reading
if (!audioOpen())
{
// FIXME: Cleanup?
return false;
}
if (mute_1750)
{
ToneDetector *calldet = new ToneDetector(1750, 50, 100);
assert(calldet != 0);
calldet->setPeakThresh(13);
calldet->activated.connect(mem_fun(*this, &LocalRxBase::tone1750detected));
voiceband_splitter->addSink(calldet, true);
//cout << "### Enabling 1750Hz muting\n";
}
return true;
} /* LocalRxBase:initialize */
bool LocalRx::initialize(void)
{
if (!Rx::initialize())
{
return false;
}
string value;
string audio_dev;
if (!cfg.getValue(name(), "AUDIO_DEV", audio_dev))
{
cerr << "*** ERROR: Config variable " << name() << "/AUDIO_DEV not set\n";
return false;
}
if (!cfg.getValue(name(), "AUDIO_CHANNEL", value))
{
cerr << "*** ERROR: Config variable " << name()
<< "/AUDIO_CHANNEL not set\n";
return false;
}
int audio_channel = atoi(value.c_str());
bool deemphasis = false;
if (cfg.getValue(name(), "DEEMPHASIS", value))
{
deemphasis = (atoi(value.c_str()) != 0);
}
int delay_line_len = 0;
if (cfg.getValue(name(), "MUTE_DTMF", value))
{
cerr << "*** ERROR: The MUTE_DTMF configuration variable has been\n"
<< " renamed to DTMF_MUTING. Change this in configuration\n"
<< " section \"" << name() << "\".\n";
return false;
}
if (cfg.getValue(name(), "DTMF_MUTING", value))
{
mute_dtmf = (atoi(value.c_str()) != 0);
delay_line_len = DTMF_MUTING_PRE;
}
if (cfg.getValue(name(), "SQL_TAIL_ELIM", value))
{
sql_tail_elim = atoi(value.c_str());
delay_line_len = max(delay_line_len, sql_tail_elim);
}
if (cfg.getValue(name(), "PREAMP", value))
{
preamp_gain = atoi(value.c_str());
}
bool peak_meter = false;
if (cfg.getValue(name(), "PEAK_METER", value))
{
peak_meter = (atoi(value.c_str()) != 0);
}
int dtmf_hangtime = 100;
if (cfg.getValue(name(), "DTMF_HANGTIME", value))
{
dtmf_hangtime = atoi(value.c_str());
}
// Create the audio IO object
audio_io = new AudioIO(audio_dev, audio_channel);
//FIXME: Check that the audio device is correctly initialized
// before continuing.
AudioSource *prev_src = audio_io;
// Create a fifo buffer to handle large audio blocks
AudioFifo *input_fifo = new AudioFifo(1024);
// input_fifo->setOverwrite(true);
prev_src->registerSink(input_fifo, true);
prev_src = input_fifo;
// If a preamp was configured, create it
if (preamp_gain != 0)
{
AudioAmp *preamp = new AudioAmp;
preamp->setGain(preamp_gain);
prev_src->registerSink(preamp, true);
prev_src = preamp;
}
// If a peak meter was configured, create it
if (peak_meter)
{
PeakMeter *peak_meter = new PeakMeter(name());
prev_src->registerSink(peak_meter, true);
prev_src = peak_meter;
}
// If the sound card sample rate is higher than 16kHz (48kHz assumed),
// decimate it down to 16kHz
if (audio_io->sampleRate() > 16000)
{
AudioDecimator *d1 = new AudioDecimator(3, coeff_48_16_wide,
coeff_48_16_wide_taps);
prev_src->registerSink(d1, true);
prev_src = d1;
}
// If the sound card sample rate is higher than 8kHz (16 or 48kHz assumed)
// decimate it down to 8kHz. Also create a splitter to distribute the
// 16kHz audio to other consumers.
#if (INTERNAL_SAMPLE_RATE != 16000)
AudioSplitter *rate_16k_splitter = 0;
if (audio_io->sampleRate() > 8000)
{
rate_16k_splitter = new AudioSplitter;
prev_src->registerSink(rate_16k_splitter, true);
AudioDecimator *d2 = new AudioDecimator(2, coeff_16_8, coeff_16_8_taps);
//prev_src->registerSink(d2, true);
rate_16k_splitter->addSink(d2, true);
prev_src = d2;
}
#endif
// If a deemphasis filter was configured, create it
if (deemphasis)
{
//AudioFilter *deemph_filt = new AudioFilter("LpBu1/300");
//AudioFilter *deemph_filt = new AudioFilter("HsBq1/0.01/-18/3500");
AudioFilter *deemph_filt = new AudioFilter("HsBq1/0.05/-36/3500");
deemph_filt->setOutputGain(2.88);
prev_src->registerSink(deemph_filt, true);
prev_src = deemph_filt;
}
// Create an audio splitter to distribute the 8kHz audio to all consumers
AudioSplitter *splitter = new AudioSplitter;
prev_src->registerSink(splitter, true);
prev_src = 0;
// Create the signal level detector. Connect it to the 16 or 8kHz splitter
// depending on how the sound card sample rate is setup.
#if (INTERNAL_SAMPLE_RATE != 16000)
if (rate_16k_splitter != 0)
{
siglevdet = createSigLevDet(name(), 16000);
if (siglevdet == 0)
{
return false;
}
rate_16k_splitter->addSink(siglevdet, true);
}
else
{
siglevdet = createSigLevDet(name(), 8000);
if (siglevdet == 0)
{
return false;
}
splitter->addSink(siglevdet, true);
}
#else
siglevdet = createSigLevDet(name(), 16000);
if (siglevdet == 0)
{
return false;
}
splitter->addSink(siglevdet, true);
#endif
// Create the configured squech detector and initialize it. Then connect
// it to the 8kHz audio splitter
string sql_det_str;
if (!cfg.getValue(name(), "SQL_DET", sql_det_str))
{
cerr << "*** ERROR: Config variable " << name() << "/SQL_DET not set\n";
return false;
}
if (sql_det_str == "VOX")
{
squelch_det = new SquelchVox;
}
else if (sql_det_str == "CTCSS")
{
squelch_det = new SquelchCtcss;
}
else if (sql_det_str == "SERIAL")
{
squelch_det = new SquelchSerial;
}
else if (sql_det_str == "SIGLEV")
{
squelch_det = new SquelchSigLev(siglevdet);
}
else if (sql_det_str == "EVDEV")
{
squelch_det = new SquelchEvDev;
}
else
{
cerr << "*** ERROR: Unknown squelch type specified in config variable "
<< name() << "/SQL_DET. Legal values are: VOX, CTCSS, SIGLEV, "
<< "EVDEV and SERIAL\n";
// FIXME: Cleanup
return false;
}
if (!squelch_det->initialize(cfg, name()))
{
cerr << "*** ERROR: Squelch detector initialization failed for RX \""
<< name() << "\"\n";
delete squelch_det;
squelch_det = 0;
// FIXME: Cleanup
return false;
}
squelch_det->squelchOpen.connect(slot(*this, &LocalRx::onSquelchOpen));
splitter->addSink(squelch_det, true);
// Create the configured type of DTMF decoder and add it to the splitter
DtmfDecoder *dtmf_dec = DtmfDecoder::create(cfg, name());
if ((dtmf_dec == 0) || !dtmf_dec->initialize())
{
// FIXME: Cleanup?
return false;
}
dtmf_dec->digitActivated.connect(slot(*this, &LocalRx::dtmfDigitActivated));
dtmf_dec->digitDeactivated.connect(
slot(*this, &LocalRx::dtmfDigitDeactivated));
splitter->addSink(dtmf_dec, true);
// creates a selective multiple tone detector object
string sel5_det_str;
if (cfg.getValue(name(), "SEL5_DEC_TYPE", sel5_det_str))
{
Sel5Decoder *sel5_dec = Sel5Decoder::create(cfg, name());
if (sel5_dec == 0 || !sel5_dec->initialize())
{
cerr << "*** ERROR: Sel5 decoder initialization failed for RX \""
<< name() << "\"\n";
return false;
}
sel5_dec->sequenceDetected.connect(slot(*this, &LocalRx::sel5Detected));
splitter->addSink(sel5_dec, true);
}
// Create a new audio splitter to handle tone detectors then add it to
// the splitter
tone_dets = new AudioSplitter;
splitter->addSink(tone_dets, true);
// Create an audio valve to use as squelch and connect it to the splitter
sql_valve = new AudioValve;
sql_valve->setOpen(false);
splitter->addSink(sql_valve, true);
prev_src = sql_valve;
// Create the state detector
AudioStreamStateDetector *state_det = new AudioStreamStateDetector;
state_det->sigStreamStateChanged.connect(
slot(*this, &LocalRx::audioStreamStateChange));
prev_src->registerSink(state_det, true);
prev_src = state_det;
// Create the highpass CTCSS filter that cuts off audio below 300Hz
AudioFilter *ctcss_filt = new AudioFilter("HpBu20/300");
prev_src->registerSink(ctcss_filt, true);
prev_src = ctcss_filt;
// If we need a delay line (e.g. for DTMF muting and/or squelch tail
// elimination), create it
if (delay_line_len > 0)
{
delay = new AudioDelayLine(delay_line_len);
prev_src->registerSink(delay, true);
prev_src = delay;
}
// Add a limiter to smoothly limiting the audio before hard clipping it
AudioCompressor *limit = new AudioCompressor;
limit->setThreshold(-1);
limit->setRatio(0.1);
limit->setAttack(2);
limit->setDecay(20);
limit->setOutputGain(1);
prev_src->registerSink(limit, true);
prev_src = limit;
// Clip audio to limit its amplitude
AudioClipper *clipper = new AudioClipper;
clipper->setClipLevel(0.98);
prev_src->registerSink(clipper, true);
prev_src = clipper;
// Remove high frequencies generated by the previous clipping
#if (INTERNAL_SAMPLE_RATE == 16000)
AudioFilter *splatter_filter = new AudioFilter("LpBu20/5500");
#else
AudioFilter *splatter_filter = new AudioFilter("LpBu20/3500");
#endif
prev_src->registerSink(splatter_filter, true);
prev_src = splatter_filter;
// Set the previous audio pipe object to handle audio distribution for
// the LocalRx class
setHandler(prev_src);
return true;
} /* LocalRx:initialize */
