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add flex decoder menu entry and fix pocsag decoding

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AlexandreRouma
2024-02-01 00:55:17 +01:00
parent 3fc893568a
commit ef42ea01d8
4 changed files with 141 additions and 142 deletions
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9
decoder_modules/pager_decoder/src/decoder.h
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@@ -1,8 +1,11 @@
#pragma once
#include <signal_path/vfo_manager.h>
class Decoder {
public:
virtual void showMenu();
virtual ~Decoder() {}
virtual void showMenu() {};
virtual void setVFO(VFOManager::VFO* vfo) = 0;
virtual void start() = 0;
virtual void stop() = 0;
};

189
decoder_modules/pager_decoder/src/main.cpp
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@@ -5,24 +5,11 @@
#include <gui/gui.h>
#include <signal_path/signal_path.h>
#include <module.h>
#include <filesystem>
#include <dsp/stream.h>
#include <dsp/buffer/reshaper.h>
#include <dsp/multirate/rational_resampler.h>
#include <dsp/sink/handler_sink.h>
#include <gui/widgets/folder_select.h>
#include <gui/widgets/symbol_diagram.h>
#include <fstream>
#include <chrono>
#include <dsp/demod/quadrature.h>
#include <dsp/clock_recovery/mm.h>
#include <dsp/taps/root_raised_cosine.h>
#include <dsp/correction/dc_blocker.h>
#include <dsp/loop/fast_agc.h>
#include <utils/optionlist.h>
#include <dsp/digital/binary_slicer.h>
#include <dsp/routing/doubler.h>
#include "pocsag/pocsag.h"
#include "decoder.h"
#include "pocsag/decoder.h"
#include "flex/decoder.h"
#define CONCAT(a, b) ((std::string(a) + b).c_str())
@@ -34,77 +21,29 @@ SDRPP_MOD_INFO{
/* Max instances */ -1
};
const char* msgTypes[] = {
"Numeric",
"Unknown (0b01)",
"Unknown (0b10)",
"Alphanumeric",
};
ConfigManager config;
#define INPUT_SAMPLE_RATE 24000.0
#define INPUT_BANDWIDTH 12500.0
#define INPUT_BAUD_RATE 2400.0
enum Protocol {
PROTOCOL_INVALID = -1,
PROTOCOL_POCSAG,
PROTOCOL_FLEX
};
class PagerDecoderModule : public ModuleManager::Instance {
public:
PagerDecoderModule(std::string name) : diag(0.6, 2400) {
PagerDecoderModule(std::string name) {
this->name = name;
// Define protocols
protocols.define("POCSAG", PROTOCOL_POCSAG);
protocols.define("FLEX", PROTOCOL_FLEX);
// Load config
config.acquire();
if (!config.conf.contains(name)) {
config.conf[name]["showLines"] = false;
}
showLines = config.conf[name]["showLines"];
if (showLines) {
diag.lines.push_back(-1.0);
diag.lines.push_back(-1.0/3.0);
diag.lines.push_back(1.0/3.0);
diag.lines.push_back(1.0);
}
config.release(true);
// Initialize VFO
vfo = sigpath::vfoManager.createVFO(name, ImGui::WaterfallVFO::REF_CENTER, 0, INPUT_BANDWIDTH, INPUT_SAMPLE_RATE, INPUT_BANDWIDTH, INPUT_BANDWIDTH, true);
// Initialize VFO with default values
vfo = sigpath::vfoManager.createVFO(name, ImGui::WaterfallVFO::REF_CENTER, 0, 12500, 24000, 12500, 12500, true);
vfo->setSnapInterval(1);
// Initialize DSP here (negative dev to invert signal)
demod.init(vfo->output, -4500.0, INPUT_SAMPLE_RATE);
dcBlock.init(&demod.out, 0.001);
float taps[] = { 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f };
shape = dsp::taps::fromArray<float>(10, taps);
fir.init(&dcBlock.out, shape);
recov.init(&fir.out, INPUT_SAMPLE_RATE/INPUT_BAUD_RATE, 1e5, 0.1, 0.05);
doubler.init(&recov.out);
slicer.init(&doubler.outB);
dataHandler.init(&slicer.out, _dataHandler, this);
reshape.init(&doubler.outA, 2400.0, (INPUT_BAUD_RATE / 30.0) - 2400.0);
diagHandler.init(&reshape.out, _diagHandler, this);
// Initialize decode
decoder.onMessage.bind(&PagerDecoderModule::messageHandler, this);
// Start DSP Here
demod.start();
dcBlock.start();
fir.start();
recov.start();
doubler.start();
slicer.start();
dataHandler.start();
reshape.start();
diagHandler.start();
// Select the protocol
selectProtocol(PROTOCOL_POCSAG);
gui::menu.registerEntry(name, menuHandler, this, this);
}
@@ -113,15 +52,8 @@ public:
gui::menu.removeEntry(name);
// Stop DSP
if (enabled) {
demod.stop();
dcBlock.stop();
fir.stop();
recov.stop();
doubler.stop();
slicer.stop();
dataHandler.stop();
reshape.stop();
diagHandler.stop();
decoder->stop();
decoder.reset();
sigpath::vfoManager.deleteVFO(vfo);
}
@@ -132,36 +64,17 @@ public:
void enable() {
double bw = gui::waterfall.getBandwidth();
vfo = sigpath::vfoManager.createVFO(name, ImGui::WaterfallVFO::REF_CENTER, std::clamp<double>(0, -bw / 2.0, bw / 2.0), INPUT_BANDWIDTH, INPUT_SAMPLE_RATE, INPUT_BANDWIDTH, INPUT_BANDWIDTH, true);
vfo->setSnapInterval(250);
vfo = sigpath::vfoManager.createVFO(name, ImGui::WaterfallVFO::REF_CENTER, std::clamp<double>(0, -bw / 2.0, bw / 2.0), 12500, 24000, 12500, 12500, true);
vfo->setSnapInterval(1);
// Start DSP
demod.start();
dcBlock.start();
fir.start();
recov.start();
doubler.start();
slicer.start();
dataHandler.start();
reshape.start();
diagHandler.start();
decoder->setVFO(vfo);
decoder->start();
enabled = true;
}
void disable() {
demod.stop();
dcBlock.stop();
fir.stop();
recov.stop();
doubler.stop();
slicer.stop();
dataHandler.stop();
reshape.stop();
diagHandler.stop();
reshape.stop();
diagHandler.stop();
decoder->stop();
sigpath::vfoManager.deleteVFO(vfo);
enabled = false;
}
@@ -170,6 +83,36 @@ public:
return enabled;
}
void selectProtocol(Protocol newProto) {
// Cannot change while disabled
if (!enabled) { return; }
// If the protocol hasn't changed, no need to do anything
if (newProto == proto) { return; }
// Delete current decoder
decoder.reset();
// Create a new decoder
switch (newProto) {
case PROTOCOL_POCSAG:
decoder = std::make_unique<POCSAGDecoder>(name, vfo);
break;
case PROTOCOL_FLEX:
decoder = std::make_unique<FLEXDecoder>(name, vfo);
break;
default:
flog::error("Tried to select unknown pager protocol");
return;
}
// Start the new decoder
decoder->start();
// Save selected protocol
proto = newProto;
}
private:
static void menuHandler(void* ctx) {
PagerDecoderModule* _this = (PagerDecoderModule*)ctx;
@@ -181,54 +124,28 @@ private:
ImGui::LeftLabel("Protocol");
ImGui::FillWidth();
if (ImGui::Combo(("##pager_decoder_proto_" + _this->name).c_str(), &_this->protoId, _this->protocols.txt)) {
// TODO
_this->selectProtocol(_this->protocols.value(_this->protoId));
}
ImGui::SetNextItemWidth(menuWidth);
_this->diag.draw();
if (_this->decoder) { _this->decoder->showMenu(); }
ImGui::Button(("Record##pager_decoder_show_" + _this->name).c_str(), ImVec2(menuWidth, 0));
ImGui::Button(("Show Messages##pager_decoder_show_" + _this->name).c_str(), ImVec2(menuWidth, 0));
if (!_this->enabled) { style::endDisabled(); }
}
static void _dataHandler(uint8_t* data, int count, void* ctx) {
PagerDecoderModule* _this = (PagerDecoderModule*)ctx;
_this->decoder.process(data, count);
}
static void _diagHandler(float* data, int count, void* ctx) {
PagerDecoderModule* _this = (PagerDecoderModule*)ctx;
float* buf = _this->diag.acquireBuffer();
memcpy(buf, data, count * sizeof(float));
_this->diag.releaseBuffer();
}
void messageHandler(pocsag::Address addr, pocsag::MessageType type, const std::string& msg) {
flog::debug("[{}]: '{}'", (uint32_t)addr, msg);
}
std::string name;
bool enabled = true;
Protocol proto = PROTOCOL_INVALID;
int protoId = 0;
OptionList<std::string, Protocol> protocols;
pocsag::Decoder decoder;
// DSP Chain
VFOManager::VFO* vfo;
dsp::demod::Quadrature demod;
dsp::correction::DCBlocker<float> dcBlock;
dsp::tap<float> shape;
dsp::filter::FIR<float, float> fir;
dsp::clock_recovery::MM<float> recov;
dsp::routing::Doubler<float> doubler;
dsp::digital::BinarySlicer slicer;
dsp::buffer::Reshaper<float> reshape;
dsp::sink::Handler<uint8_t> dataHandler;
dsp::sink::Handler<float> diagHandler;
ImGui::SymbolDiagram diag;
std::unique_ptr<Decoder> decoder;
bool showLines = false;
};

83
decoder_modules/pager_decoder/src/pocsag/decoder.h
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@@ -1,28 +1,107 @@
#pragma once
#include "../decoder.h"
#include <signal_path/vfo_manager.h>
#include <utils/optionlist.h>
#include <gui/widgets/symbol_diagram.h>
#include <gui/style.h>
#include <dsp/sink/handler_sink.h>
#include "dsp.h"
#include "pocsag.h"
const char* msgTypes[] = {
"Numeric",
"Unknown (0b01)",
"Unknown (0b10)",
"Alphanumeric",
};
class POCSAGDecoder : public Decoder {
public:
POCSAGDecoder() : diag(0.6, 2400) {
POCSAGDecoder(const std::string& name, VFOManager::VFO* vfo) : diag(0.6, 2400) {
this->name = name;
this->vfo = vfo;
// Define baudrate options
baudrates.define(512, "512 Baud", 512);
baudrates.define(1200, "1200 Baud", 1200);
baudrates.define(2400, "2400 Baud", 2400);
// Init DSP
vfo->setBandwidthLimits(12500, 12500, true);
vfo->setSampleRate(24000, 12500);
dsp.init(vfo->output, 24000, 2400);
reshape.init(&dsp.soft, 2400.0, (2400 / 30.0) - 2400.0);
dataHandler.init(&dsp.out, _dataHandler, this);
diagHandler.init(&reshape.out, _diagHandler, this);
// Init decoder
decoder.onMessage.bind(&POCSAGDecoder::messageHandler, this);
}
~POCSAGDecoder() {
stop();
}
void showMenu() {
ImGui::LeftLabel("Baudrate");
ImGui::FillWidth();
if (ImGui::Combo(("##pager_decoder_proto_" + name).c_str(), &brId, baudrates.txt)) {
if (ImGui::Combo(("##pager_decoder_pocsag_br_" + name).c_str(), &brId, baudrates.txt)) {
// TODO
}
ImGui::FillWidth();
diag.draw();
}
void setVFO(VFOManager::VFO* vfo) {
this->vfo = vfo;
vfo->setBandwidthLimits(12500, 12500, true);
vfo->setSampleRate(24000, 12500);
dsp.setInput(vfo->output);
}
void start() {
flog::debug("POCSAG start");
dsp.start();
reshape.start();
dataHandler.start();
diagHandler.start();
}
void stop() {
flog::debug("POCSAG stop");
dsp.stop();
reshape.stop();
dataHandler.stop();
diagHandler.stop();
}
private:
static void _dataHandler(uint8_t* data, int count, void* ctx) {
POCSAGDecoder* _this = (POCSAGDecoder*)ctx;
_this->decoder.process(data, count);
}
static void _diagHandler(float* data, int count, void* ctx) {
POCSAGDecoder* _this = (POCSAGDecoder*)ctx;
float* buf = _this->diag.acquireBuffer();
memcpy(buf, data, count * sizeof(float));
_this->diag.releaseBuffer();
}
void messageHandler(pocsag::Address addr, pocsag::MessageType type, const std::string& msg) {
flog::debug("[{}]: '{}'", (uint32_t)addr, msg);
}
std::string name;
VFOManager::VFO* vfo;
POCSAGDSP dsp;
dsp::buffer::Reshaper<float> reshape;
dsp::sink::Handler<uint8_t> dataHandler;
dsp::sink::Handler<float> diagHandler;
pocsag::Decoder decoder;
ImGui::SymbolDiagram diag;

2
decoder_modules/pager_decoder/src/pocsag/dsp.h
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@@ -11,7 +11,7 @@
#include <dsp/digital/binary_slicer.h>
#include <dsp/routing/doubler.h>
class POCSAGDSP : dsp::Processor<dsp::complex_t, uint8_t> {
class POCSAGDSP : public dsp::Processor<dsp::complex_t, uint8_t> {
using base_type = dsp::Processor<dsp::complex_t, uint8_t>;
public:
POCSAGDSP() {}