279 lines
8.7 KiB
C++
279 lines
8.7 KiB
C++
#include "CubicSDRDefs.h"
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#include "DemodulatorThread.h"
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#include "DemodulatorInstance.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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DemodulatorThread::DemodulatorThread(DemodulatorInstance *parent) : IOThread(), iqAutoGain(NULL), audioSampleRate(0), squelchLevel(0), signalLevel(0), squelchEnabled(false), iqInputQueue(NULL), audioOutputQueue(NULL), audioVisOutputQueue(NULL), threadQueueControl(NULL), threadQueueNotify(NULL), cModem(nullptr), cModemKit(nullptr) {
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demodInstance = parent;
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muted.store(false);
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agcEnabled.store(false);
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}
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DemodulatorThread::~DemodulatorThread() {
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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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audioVisOutputQueue = (DemodulatorThreadOutputQueue *)threadQueue;
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}
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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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// Automatic IQ gain
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iqAutoGain = agc_crcf_create();
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agc_crcf_set_bandwidth(iqAutoGain, 0.1);
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ReBuffer<AudioThreadInput> audioVisBuffers;
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std::cout << "Demodulator thread started.." << std::endl;
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iqInputQueue = (DemodulatorThreadPostInputQueue*)getInputQueue("IQDataInput");
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audioOutputQueue = (AudioThreadInputQueue*)getOutputQueue("AudioDataOutput");
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threadQueueControl = (DemodulatorThreadControlCommandQueue *)getInputQueue("ControlQueue");
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threadQueueNotify = (DemodulatorThreadCommandQueue*)getOutputQueue("NotifyQueue");
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ModemIQData modemData;
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while (!terminated) {
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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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audioSampleRate = demodInstance->getAudioSampleRate();
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int 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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if (agcData.size() != bufSize) {
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if (agcData.capacity() < bufSize) {
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agcData.reserve(bufSize);
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agcAMData.reserve(bufSize);
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}
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agcData.resize(bufSize);
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agcAMData.resize(bufSize);
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}
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agc_crcf_execute_block(iqAutoGain, &(inp->data[0]), bufSize, &agcData[0]);
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float currentSignalLevel = 0;
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currentSignalLevel = ((60.0 / fabs(agc_crcf_get_rssi(iqAutoGain))) / 15.0 - signalLevel);
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if (agc_crcf_get_signal_level(iqAutoGain) > currentSignalLevel) {
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currentSignalLevel = agc_crcf_get_signal_level(iqAutoGain);
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}
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std::vector<liquid_float_complex> *inputData;
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if (agcEnabled) {
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inputData = &agcData;
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} else {
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inputData = &inp->data;
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}
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modemData.sampleRate = inp->sampleRate;
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modemData.data.assign(inputData->begin(), inputData->end());
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modemData.setRefCount(1);
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AudioThreadInput *ati = NULL;
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ati = outputBuffers.getBuffer();
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ati->sampleRate = audioSampleRate;
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ati->inputRate = inp->sampleRate;
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ati->setRefCount(1);
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cModem->demodulate(cModemKit, &modemData, ati);
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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;
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}
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if (audioOutputQueue != NULL) {
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if (ati && (!squelchEnabled || (signalLevel >= squelchLevel))) {
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std::vector<float>::iterator data_i;
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ati->peak = 0;
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for (data_i = ati->data.begin(); data_i != ati->data.end(); data_i++) {
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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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}
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}
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if (ati && audioVisOutputQueue != NULL && audioVisOutputQueue->empty()) {
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AudioThreadInput *ati_vis = audioVisBuffers.getBuffer();
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ati_vis->setRefCount(1);
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ati_vis->sampleRate = inp->sampleRate;
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ati_vis->inputRate = inp->sampleRate;
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int num_vis = DEMOD_VIS_SIZE;
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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->modemType == "I/Q") {
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for (int i = 0; i < stereoSize / 2; i++) {
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ati_vis->data[i] = agcData[i].real * 0.75;
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ati_vis->data[i + stereoSize / 2] = agcData[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 = 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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} else {
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int numAudioWritten = ati->data.size();
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ati_vis->channels = 1;
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// if (numAudioWritten > bufSize) {
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ati_vis->inputRate = 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 > bufSize) {
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// num_vis = bufSize;
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// }
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// ati_vis->data.assign(ati->data.begin(), ati->data.begin() + num_vis);
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// }
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// std::cout << "Signal: " << agc_crcf_get_signal_level(agc) << " -- " << agc_crcf_get_rssi(agc) << "dB " << std::endl;
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}
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audioVisOutputQueue->push(ati_vis);
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}
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if (ati != NULL) {
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if (!muted.load()) {
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audioOutputQueue->push(ati);
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} else {
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ati->setRefCount(0);
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}
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}
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if (!threadQueueControl->empty()) {
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while (!threadQueueControl->empty()) {
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DemodulatorThreadControlCommand command;
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threadQueueControl->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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}
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inp->decRefCount();
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}
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// end while !terminated
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outputBuffers.purge();
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if (audioVisOutputQueue && !audioVisOutputQueue->empty()) {
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AudioThreadInput *dummy_vis;
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audioVisOutputQueue->pop(dummy_vis);
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}
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audioVisBuffers.purge();
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DemodulatorThreadCommand tCmd(DemodulatorThreadCommand::DEMOD_THREAD_CMD_DEMOD_TERMINATED);
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tCmd.context = this;
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threadQueueNotify->push(tCmd);
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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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terminated = true;
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DemodulatorThreadPostIQData *inp = new DemodulatorThreadPostIQData; // push dummy to nudge queue
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iqInputQueue->push(inp);
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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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void DemodulatorThread::setAGC(bool state) {
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agcEnabled.store(state);
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}
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bool DemodulatorThread::getAGC() {
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return agcEnabled.load();
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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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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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