415 lines
14 KiB
C++
415 lines
14 KiB
C++
// Copyright (c) Charles J. Cliffe
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// SPDX-License-Identifier: GPL-2.0+
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#include "CubicSDRDefs.h"
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#include "DemodulatorThread.h"
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#include "DemodulatorInstance.h"
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#include "CubicSDR.h"
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#include <vector>
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#include <cmath>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifdef __APPLE__
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#include <pthread.h>
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#endif
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std::atomic<DemodulatorInstance *> DemodulatorThread::squelchLock(nullptr);
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std::mutex DemodulatorThread::squelchLockMutex;
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DemodulatorThread::DemodulatorThread(DemodulatorInstance *parent)
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: IOThread(), outputBuffers("DemodulatorThreadBuffers"), squelchLevel(-100),
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signalLevel(-100), signalFloor(-30), signalCeil(30), squelchEnabled(false) {
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demodInstance = parent;
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muted.store(false);
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squelchBreak = false;
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}
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DemodulatorThread::~DemodulatorThread() {
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releaseSquelchLock(demodInstance);
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}
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void DemodulatorThread::onBindOutput(std::string name, ThreadQueueBase *threadQueue) {
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if (name == "AudioVisualOutput") {
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//protects because it may be changed at runtime
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std::lock_guard < std::mutex > lock(m_mutexAudioVisOutputQueue);
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audioVisOutputQueue = static_cast<DemodulatorThreadOutputQueue*>(threadQueue);
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}
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}
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double DemodulatorThread::abMagnitude(float inphase, float quadrature) {
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// cast to double, so we keep precision despite the **2 op later.
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double dinphase = (double)inphase;
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double dquadrature = (double)quadrature;
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//sqrt() has been an insanely fast intrinsic for years, use it !
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return sqrt(dinphase * dinphase + dquadrature * dquadrature);
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}
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double DemodulatorThread::linearToDb(double linear) {
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#define SMALL 1e-20
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if (linear <= SMALL) {
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linear = double(SMALL);
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}
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return 20.0 * log10(linear);
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}
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void DemodulatorThread::run() {
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#ifdef __APPLE__
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pthread_t tID = pthread_self(); // ID of this thread
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int priority = sched_get_priority_max( SCHED_FIFO )-1;
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sched_param prio = {priority}; // scheduling priority of thread
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pthread_setschedparam(tID, SCHED_FIFO, &prio);
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#endif
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// std::cout << "Demodulator thread started.." << std::endl;
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iqInputQueue = static_cast<DemodulatorThreadPostInputQueue*>(getInputQueue("IQDataInput"));
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audioOutputQueue = static_cast<AudioThreadInputQueue*>(getOutputQueue("AudioDataOutput"));
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threadQueueControl = static_cast<DemodulatorThreadControlCommandQueue *>(getInputQueue("ControlQueue"));
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ModemIQData modemData;
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while (!stopping) {
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DemodulatorThreadPostIQData *inp;
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iqInputQueue->pop(inp);
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// std::lock_guard < std::mutex > lock(inp->m_mutex);
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size_t bufSize = inp->data.size();
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if (!bufSize) {
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inp->decRefCount();
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continue;
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}
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if (inp->modemKit && inp->modemKit != cModemKit) {
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if (cModemKit != nullptr) {
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cModem->disposeKit(cModemKit);
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}
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cModemKit = inp->modemKit;
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}
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if (inp->modem && inp->modem != cModem) {
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delete cModem;
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cModem = inp->modem;
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}
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if (!cModem || !cModemKit) {
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inp->decRefCount();
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continue;
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}
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std::vector<liquid_float_complex> *inputData;
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inputData = &inp->data;
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modemData.sampleRate = inp->sampleRate;
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modemData.data.assign(inputData->begin(), inputData->end());
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AudioThreadInput *ati = nullptr;
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ModemAnalog *modemAnalog = (cModem->getType() == "analog")?((ModemAnalog *)cModem):nullptr;
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ModemDigital *modemDigital = (cModem->getType() == "digital")?((ModemDigital *)cModem):nullptr;
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if (modemAnalog != nullptr) {
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ati = outputBuffers.getBuffer();
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ati->sampleRate = cModemKit->audioSampleRate;
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ati->inputRate = inp->sampleRate;
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} else if (modemDigital != nullptr) {
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ati = outputBuffers.getBuffer();
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ati->sampleRate = cModemKit->sampleRate;
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ati->inputRate = inp->sampleRate;
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ati->data.resize(0);
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}
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cModem->demodulate(cModemKit, &modemData, ati);
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double currentSignalLevel = 0;
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double sampleTime = double(inp->data.size()) / double(inp->sampleRate);
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if (audioOutputQueue != nullptr && ati && ati->data.size()) {
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double accum = 0;
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if (cModem->useSignalOutput()) {
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for (auto i : ati->data) {
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accum += abMagnitude(i, 0.0);
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}
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currentSignalLevel = linearToDb(accum / double(ati->data.size()));
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} else {
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for (auto i : inp->data) {
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accum += abMagnitude(i.real, i.imag);
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}
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currentSignalLevel = linearToDb(accum / double(inp->data.size()));
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}
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float sf = signalFloor.load(), sc = signalCeil.load(), sl = squelchLevel.load();
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if (currentSignalLevel > sc) {
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sc = currentSignalLevel;
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}
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if (currentSignalLevel < sf) {
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sf = currentSignalLevel;
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}
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if (sl+1.0f > sc) {
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sc = sl+1.0f;
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}
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if ((sf+2.0f) > sc) {
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sc = sf+2.0f;
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}
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sc -= (sc - (currentSignalLevel + 2.0f)) * sampleTime * 0.05f;
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sf += ((currentSignalLevel - 5.0f) - sf) * sampleTime * 0.15f;
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signalFloor.store(sf);
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signalCeil.store(sc);
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}
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if (currentSignalLevel > signalLevel) {
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signalLevel = signalLevel + (currentSignalLevel - signalLevel) * 0.5;
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} else {
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signalLevel = signalLevel + (currentSignalLevel - signalLevel) * 0.05 * sampleTime * 30.0;
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}
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bool squelched = (muted.load() || (squelchEnabled && (signalLevel < squelchLevel)));
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if (squelchEnabled) {
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if (!squelched && !squelchBreak) {
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if (wxGetApp().getSoloMode() && !wxGetApp().getAppFrame()->isUserDemodBusy()) {
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std::lock_guard < std::mutex > lock(squelchLockMutex);
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if (squelchLock.load() == nullptr) {
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squelchLock.store(demodInstance);
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wxGetApp().getDemodMgr().setActiveDemodulator(nullptr);
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wxGetApp().getDemodMgr().setActiveDemodulator(demodInstance, false);
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squelchBreak = true;
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demodInstance->getVisualCue()->triggerSquelchBreak(120);
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}
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} else {
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squelchBreak = true;
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demodInstance->getVisualCue()->triggerSquelchBreak(120);
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}
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} else if (squelched && squelchBreak) {
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releaseSquelchLock(demodInstance);
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squelchBreak = false;
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}
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}
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if (audioOutputQueue != nullptr && ati && ati->data.size() && !squelched) {
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std::vector<float>::iterator data_i;
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ati->peak = 0;
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for (auto data_i : ati->data) {
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float p = fabs(data_i);
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if (p > ati->peak) {
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ati->peak = p;
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}
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}
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} else if (ati) {
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ati->setRefCount(0);
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ati = nullptr;
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}
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//At that point, capture the current state of audioVisOutputQueue in a local
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//variable, and works with it with now on until the next while-turn.
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DemodulatorThreadOutputQueue* localAudioVisOutputQueue = nullptr;
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{
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std::lock_guard < std::mutex > lock(m_mutexAudioVisOutputQueue);
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localAudioVisOutputQueue = audioVisOutputQueue;
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}
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if ((ati || modemDigital) && localAudioVisOutputQueue != nullptr && localAudioVisOutputQueue->empty()) {
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AudioThreadInput *ati_vis = new AudioThreadInput;
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ati_vis->sampleRate = inp->sampleRate;
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ati_vis->inputRate = inp->sampleRate;
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size_t num_vis = DEMOD_VIS_SIZE;
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if (modemDigital) {
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if (ati) { // TODO: handle digital modems with audio output
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ati->setRefCount(0);
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ati = nullptr;
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}
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ati_vis->data.resize(inputData->size());
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ati_vis->channels = 2;
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for (int i = 0, iMax = inputData->size() / 2; i < iMax; i++) {
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ati_vis->data[i * 2] = (*inputData)[i].real;
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ati_vis->data[i * 2 + 1] = (*inputData)[i].imag;
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}
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ati_vis->type = 2;
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} else if (ati->channels==2) {
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ati_vis->channels = 2;
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int stereoSize = ati->data.size();
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if (stereoSize > DEMOD_VIS_SIZE * 2) {
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stereoSize = DEMOD_VIS_SIZE * 2;
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}
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ati_vis->data.resize(stereoSize);
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if (inp->modemName == "I/Q") {
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for (int i = 0; i < stereoSize / 2; i++) {
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ati_vis->data[i] = (*inputData)[i].real * 0.75;
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ati_vis->data[i + stereoSize / 2] = (*inputData)[i].imag * 0.75;
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}
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} else {
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for (int i = 0; i < stereoSize / 2; i++) {
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ati_vis->inputRate = cModemKit->audioSampleRate;
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ati_vis->sampleRate = 36000;
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ati_vis->data[i] = ati->data[i * 2];
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ati_vis->data[i + stereoSize / 2] = ati->data[i * 2 + 1];
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}
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}
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ati_vis->type = 1;
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} else {
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size_t numAudioWritten = ati->data.size();
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ati_vis->channels = 1;
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std::vector<float> *demodOutData = (modemAnalog != nullptr)?modemAnalog->getDemodOutputData():nullptr;
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if ((numAudioWritten > bufSize) || (demodOutData == nullptr)) {
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ati_vis->inputRate = cModemKit->audioSampleRate;
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if (num_vis > numAudioWritten) {
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num_vis = numAudioWritten;
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}
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ati_vis->data.assign(ati->data.begin(), ati->data.begin() + num_vis);
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} else {
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if (num_vis > demodOutData->size()) {
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num_vis = demodOutData->size();
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}
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ati_vis->data.assign(demodOutData->begin(), demodOutData->begin() + num_vis);
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}
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ati_vis->type = 0;
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}
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if (!localAudioVisOutputQueue->push(ati_vis)) {
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ati_vis->setRefCount(0);
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std::cout << "DemodulatorThread::run() cannot push ati_vis into localAudioVisOutputQueue, is full !" << std::endl;
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std::this_thread::yield();
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}
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}
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if (ati != nullptr) {
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if (!muted.load() && (!wxGetApp().getSoloMode() || (demodInstance == wxGetApp().getDemodMgr().getLastActiveDemodulator()))) {
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if (!audioOutputQueue->push(ati)) {
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ati->decRefCount();
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std::cout << "DemodulatorThread::run() cannot push ati into audioOutputQueue, is full !" << std::endl;
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std::this_thread::yield();
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}
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} else {
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ati->setRefCount(0);
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}
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}
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DemodulatorThreadControlCommand command;
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//empty command queue, execute commands
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while (threadQueueControl->try_pop(command)) {
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switch (command.cmd) {
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case DemodulatorThreadControlCommand::DEMOD_THREAD_CMD_CTL_SQUELCH_ON:
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squelchEnabled = true;
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break;
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case DemodulatorThreadControlCommand::DEMOD_THREAD_CMD_CTL_SQUELCH_OFF:
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squelchEnabled = false;
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break;
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default:
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break;
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}
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}
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inp->decRefCount();
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}
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// end while !stopping
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// Purge any unused inputs, with a non-blocking pop
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DemodulatorThreadPostIQData *ref;
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while (iqInputQueue->try_pop(ref)) {
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if (ref) { // May have other consumers; just decrement
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ref->decRefCount();
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}
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}
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AudioThreadInput *ref_audio;
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while (audioOutputQueue->try_pop(ref_audio)) {
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if (ref_audio) { // Originated here; set RefCount to 0
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ref_audio->setRefCount(0);
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}
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}
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outputBuffers.purge();
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// std::cout << "Demodulator thread done." << std::endl;
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}
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void DemodulatorThread::terminate() {
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IOThread::terminate();
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DemodulatorThreadPostIQData *inp = new DemodulatorThreadPostIQData; // push dummy to nudge queue
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if (!iqInputQueue->push(inp)) {
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delete inp;
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}
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}
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bool DemodulatorThread::isMuted() {
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return muted.load();
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}
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void DemodulatorThread::setMuted(bool muted) {
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this->muted.store(muted);
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}
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float DemodulatorThread::getSignalLevel() {
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return signalLevel.load();
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}
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float DemodulatorThread::getSignalFloor() {
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return signalFloor.load();
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}
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float DemodulatorThread::getSignalCeil() {
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return signalCeil.load();
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}
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void DemodulatorThread::setSquelchLevel(float signal_level_in) {
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if (!squelchEnabled) {
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squelchEnabled = true;
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}
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squelchLevel = signal_level_in;
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}
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float DemodulatorThread::getSquelchLevel() {
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return squelchLevel;
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}
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bool DemodulatorThread::getSquelchBreak() {
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return squelchBreak;
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}
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void DemodulatorThread::releaseSquelchLock(DemodulatorInstance *inst) {
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std::lock_guard < std::mutex > lock(squelchLockMutex);
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if (inst == nullptr || squelchLock.load() == inst) {
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squelchLock.store(nullptr);
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}
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} |