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This commit is contained in:
Ryzerth
2020-07-19 15:59:44 +02:00
parent 370324bc68
commit cbf0b6290d
28 changed files with 9162 additions and 393 deletions
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90
src/signal_path.cpp
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@@ -26,11 +26,47 @@ void SignalPath::init(uint64_t sampleRate, int fftRate, int fftSize, dsp::stream
demod.init(mainVFO.output, 100000, 200000, 800);
amDemod.init(mainVFO.output, 50);
ssbDemod.init(mainVFO.output, 6000, 3000, 22);
audioResamp.init(&demod.output, 200000, 40000, 20000, 800);
audio.init(audioResamp.output, 160);
audioResamp.init(&demod.output, 200000, 48000, 800);
audio.init(&audioResamp.output, 16);
}
ns.init(mainVFO.output, 800);
dsp::DCBiasRemover dcBiasRemover;
dsp::Splitter split;
dsp::BlockDecimator fftBlockDec;
dsp::HandlerSink fftHandlerSink;
dsp::VFO mainVFO;
dsp::FMDemodulator demod;
dsp::AMDemodulator amDemod;
dsp::FloatResampler audioResamp;
io::AudioSink audio;
void SignalPath::setSampleRate(float sampleRate) {
dcBiasRemover.stop();
split.stop();
fftBlockDec.stop();
fftHandlerSink.stop();
demod.stop();
amDemod.stop();
audioResamp.stop();
int inputBlockSize = sampleRate / 200.0f;
dcBiasRemover.setBlockSize(inputBlockSize);
split.setBlockSize(inputBlockSize);
fftBlockDec.setSkip((sampleRate / fftRate) - fftSize);
mainVFO.setInputSampleRate(sampleRate, inputBlockSize);
// // Reset the modulator and audio systems
setDemodulator(_demod);
fftHandlerSink.start();
fftBlockDec.start();
split.start();
dcBiasRemover.start();
}
void SignalPath::setVFOFrequency(long frequency) {
@@ -53,27 +89,71 @@ void SignalPath::setDemodulator(int demId) {
printf("Stopping FM demodulator\n");
demod.stop();
}
else if (_demod == DEMOD_NFM) {
printf("Stopping NFM demodulator\n");
demod.stop();
}
else if (_demod == DEMOD_AM) {
printf("Stopping AM demodulator\n");
amDemod.stop();
}
else if (_demod == DEMOD_USB) {
printf("Stopping USB demodulator\n");
ssbDemod.stop();
}
else if (_demod == DEMOD_LSB) {
printf("Stopping LSB demodulator\n");
ssbDemod.stop();
}
_demod = demId;
// Set input of the audio resampler
if (demId == DEMOD_FM) {
printf("Starting FM demodulator\n");
mainVFO.setOutputSampleRate(200000, 200000);
demod.setBlockSize(mainVFO.getOutputBlockSize());
demod.setSampleRate(200000);
demod.setDeviation(100000);
audioResamp.setInput(&demod.output);
audioResamp.setInputSampleRate(200000, 800);
audioResamp.setInputSampleRate(200000, mainVFO.getOutputBlockSize());
demod.start();
}
if (demId == DEMOD_NFM) {
printf("Starting NFM demodulator\n");
mainVFO.setOutputSampleRate(12500, 12500);
demod.setBlockSize(mainVFO.getOutputBlockSize());
demod.setSampleRate(12500);
demod.setDeviation(6250);
audioResamp.setInput(&demod.output);
audioResamp.setInputSampleRate(12500, mainVFO.getOutputBlockSize());
demod.start();
}
else if (demId == DEMOD_AM) {
printf("Starting AM demodulator\n");
mainVFO.setOutputSampleRate(12500, 12500);
amDemod.setBlockSize(mainVFO.getOutputBlockSize());
audioResamp.setInput(&amDemod.output);
audioResamp.setInputSampleRate(12500, 50);
audioResamp.setInputSampleRate(12500, mainVFO.getOutputBlockSize());
amDemod.start();
}
else if (demId == DEMOD_USB) {
printf("Starting USB demodulator\n");
mainVFO.setOutputSampleRate(6000, 3000);
ssbDemod.setBlockSize(mainVFO.getOutputBlockSize());
ssbDemod.setMode(dsp::SSBDemod::MODE_USB);
audioResamp.setInput(&ssbDemod.output);
audioResamp.setInputSampleRate(6000, mainVFO.getOutputBlockSize());
ssbDemod.start();
}
else if (demId == DEMOD_LSB) {
printf("Starting LSB demodulator\n");
mainVFO.setOutputSampleRate(6000, 3000);
ssbDemod.setBlockSize(mainVFO.getOutputBlockSize());
ssbDemod.setMode(dsp::SSBDemod::MODE_LSB);
audioResamp.setInput(&ssbDemod.output);
audioResamp.setInputSampleRate(6000, mainVFO.getOutputBlockSize());
ssbDemod.start();
}
audioResamp.start();
}