kopia lustrzana https://github.com/AlexandreRouma/SDRPlusPlus
87 wiersze
2.9 KiB
C++
87 wiersze
2.9 KiB
C++
#pragma once
|
|
#include <dsp/processor.h>
|
|
#include <dsp/loop/fast_agc.h>
|
|
#include <dsp/loop/costas.h>
|
|
#include <dsp/taps/band_pass.h>
|
|
#include <dsp/filter/fir.h>
|
|
#include <dsp/convert/complex_to_real.h>
|
|
#include <dsp/clock_recovery/mm.h>
|
|
#include <dsp/digital/binary_slicer.h>
|
|
#include <dsp/digital/differential_decoder.h>
|
|
|
|
class RDSDemod : public dsp::Processor<dsp::complex_t, uint8_t> {
|
|
using base_type = dsp::Processor<dsp::complex_t, uint8_t>;
|
|
public:
|
|
RDSDemod() {}
|
|
RDSDemod(dsp::stream<dsp::complex_t>* in) { init(in); }
|
|
~RDSDemod() {}
|
|
|
|
void init(dsp::stream<dsp::complex_t>* in) {
|
|
// Initialize the DSP
|
|
agc.init(NULL, 1.0, 1e6, 0.1);
|
|
costas.init(NULL, 0.005f);
|
|
taps = dsp::taps::bandPass<dsp::complex_t>(0, 2375, 100, 5000);
|
|
fir.init(NULL, taps);
|
|
double baudfreq = dsp::math::hzToRads(2375.0/2.0, 5000);
|
|
costas2.init(NULL, 0.01, 0.0, baudfreq, baudfreq - (baudfreq*0.1), baudfreq + (baudfreq*0.1));
|
|
recov.init(NULL, 5000.0 / (2375.0 / 2.0), 1e-6, 0.01, 0.01);
|
|
diff.init(NULL, 2);
|
|
|
|
// Free useless buffers
|
|
agc.out.free();
|
|
fir.out.free();
|
|
costas2.out.free();
|
|
recov.out.free();
|
|
|
|
// Init the rest
|
|
base_type::init(in);
|
|
}
|
|
|
|
void reset() {
|
|
assert(base_type::_block_init);
|
|
std::lock_guard<std::recursive_mutex> lck(base_type::ctrlMtx);
|
|
base_type::tempStop();
|
|
agc.reset();
|
|
costas.reset();
|
|
fir.reset();
|
|
costas2.reset();
|
|
recov.reset();
|
|
diff.reset();
|
|
base_type::tempStart();
|
|
}
|
|
|
|
inline int process(int count, dsp::complex_t* in, float* softOut, uint8_t* hardOut) {
|
|
count = agc.process(count, in, costas.out.readBuf);
|
|
count = costas.process(count, costas.out.readBuf, costas.out.writeBuf);
|
|
count = fir.process(count, costas.out.writeBuf, costas.out.writeBuf);
|
|
count = costas2.process(count, costas.out.writeBuf, costas.out.readBuf);
|
|
count = dsp::convert::ComplexToReal::process(count, costas.out.readBuf, softOut);
|
|
count = recov.process(count, softOut, softOut);
|
|
count = dsp::digital::BinarySlicer::process(count, softOut, diff.out.readBuf);
|
|
count = diff.process(count, diff.out.readBuf, hardOut);
|
|
return count;
|
|
}
|
|
|
|
int run() {
|
|
int count = base_type::_in->read();
|
|
if (count < 0) { return -1; }
|
|
|
|
count = process(count, base_type::_in->readBuf, soft.writeBuf, base_type::out.writeBuf);
|
|
|
|
base_type::_in->flush();
|
|
if (!base_type::out.swap(count)) { return -1; }
|
|
if (!soft.swap(count)) { return -1; }
|
|
return count;
|
|
}
|
|
|
|
dsp::stream<float> soft;
|
|
|
|
private:
|
|
dsp::loop::FastAGC<dsp::complex_t> agc;
|
|
dsp::loop::Costas<2> costas;
|
|
dsp::tap<dsp::complex_t> taps;
|
|
dsp::filter::FIR<dsp::complex_t, dsp::complex_t> fir;
|
|
dsp::loop::Costas<2> costas2;
|
|
dsp::clock_recovery::MM<float> recov;
|
|
dsp::digital::DifferentialDecoder diff;
|
|
}; |