579 lines
20 KiB
C++
579 lines
20 KiB
C++
#include "CubicSDRDefs.h"
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#include "DemodulatorThread.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(DemodulatorThreadPostInputQueue* iqInputQueue, DemodulatorThreadControlCommandQueue *threadQueueControl,
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DemodulatorThreadCommandQueue* threadQueueNotify) :
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iqInputQueue(iqInputQueue), audioVisOutputQueue(NULL), audioOutputQueue(NULL), iqAutoGain(NULL), amOutputCeil(1), amOutputCeilMA(1), amOutputCeilMAA(
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1), stereo(false), terminated(
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false), demodulatorType(DEMOD_TYPE_FM), threadQueueNotify(threadQueueNotify), threadQueueControl(threadQueueControl), squelchLevel(0), signalLevel(
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0), squelchEnabled(false), audioSampleRate(0) {
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demodFM = freqdem_create(0.5);
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demodAM_USB = ampmodem_create(0.5, 0.0, LIQUID_AMPMODEM_USB, 1);
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demodAM_LSB = ampmodem_create(0.5, 0.0, LIQUID_AMPMODEM_LSB, 1);
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demodAM_DSB = ampmodem_create(0.5, 0.0, LIQUID_AMPMODEM_DSB, 1);
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demodAM_DSB_CSP = ampmodem_create(0.5, 0.0, LIQUID_AMPMODEM_DSB, 0);
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demodAM = demodAM_DSB_CSP;
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// advanced demodulators
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demodASK = modem_create(LIQUID_MODEM_ASK256);
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demodAPSK = modem_create(LIQUID_MODEM_APSK256);
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demodBPSK = modem_create(LIQUID_MODEM_BPSK);
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demodDPSK = modem_create(LIQUID_MODEM_DPSK256);
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demodPSK = modem_create(LIQUID_MODEM_PSK256);
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demodOOK = modem_create(LIQUID_MODEM_OOK);
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demodSQAM = modem_create(LIQUID_MODEM_SQAM128);
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demodST = modem_create(LIQUID_MODEM_V29);
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demodQAM = modem_create(LIQUID_MODEM_QAM256);
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demodQPSK = modem_create(LIQUID_MODEM_QPSK);
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currentDemodLock = false;
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}
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DemodulatorThread::~DemodulatorThread() {
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}
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#ifdef __APPLE__
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void *DemodulatorThread::threadMain() {
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#else
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void DemodulatorThread::threadMain() {
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#endif
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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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msresamp_rrrf audioResampler = NULL;
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msresamp_rrrf stereoResampler = NULL;
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firfilt_rrrf firStereoLeft = NULL;
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firfilt_rrrf firStereoRight = NULL;
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liquid_float_complex x, y, z[2];
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float rz[2];
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firhilbf firStereoR2C = firhilbf_create(5, 60.0f);
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firhilbf firStereoC2R = firhilbf_create(5, 60.0f);
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nco_crcf stereoShifter = nco_crcf_create(LIQUID_NCO);
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double stereoShiftFrequency = 0;
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// half band filter used for side-band elimination
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resamp2_cccf ssbFilt = resamp2_cccf_create(12,-0.25f,60.0f);
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// Automatic IQ gain
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iqAutoGain = agc_crcf_create();
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agc_crcf_set_bandwidth(iqAutoGain, 0.9);
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AudioThreadInput *ati_vis = new AudioThreadInput;
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ati_vis->data.reserve(DEMOD_VIS_SIZE);
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std::cout << "Demodulator thread started.." << std::endl;
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switch (demodulatorType.load()) {
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case DEMOD_TYPE_FM:
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break;
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case DEMOD_TYPE_LSB:
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demodAM = demodAM_LSB;
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break;
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case DEMOD_TYPE_USB:
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demodAM = demodAM_USB;
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break;
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case DEMOD_TYPE_DSB:
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demodAM = demodAM_DSB;
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break;
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case DEMOD_TYPE_AM:
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demodAM = demodAM_DSB_CSP;
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break;
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}
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terminated = false;
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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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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 (audioResampler == NULL) {
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audioResampler = inp->audioResampler;
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stereoResampler = inp->stereoResampler;
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firStereoLeft = inp->firStereoLeft;
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firStereoRight = inp->firStereoRight;
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audioSampleRate = inp->audioSampleRate;
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} else if (audioResampler != inp->audioResampler) {
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msresamp_rrrf_destroy(audioResampler);
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msresamp_rrrf_destroy(stereoResampler);
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audioResampler = inp->audioResampler;
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stereoResampler = inp->stereoResampler;
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audioSampleRate = inp->audioSampleRate;
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if (demodAM) {
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ampmodem_reset(demodAM);
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}
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freqdem_reset(demodFM);
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}
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if (firStereoLeft != inp->firStereoLeft) {
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if (firStereoLeft != NULL) {
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firfilt_rrrf_destroy(firStereoLeft);
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}
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firStereoLeft = inp->firStereoLeft;
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}
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if (firStereoRight != inp->firStereoRight) {
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if (firStereoRight != NULL) {
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firfilt_rrrf_destroy(firStereoRight);
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}
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firStereoRight = inp->firStereoRight;
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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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double audio_resample_ratio = inp->audioResampleRatio;
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if (demodOutputData.size() != bufSize) {
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if (demodOutputData.capacity() < bufSize) {
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demodOutputData.reserve(bufSize);
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}
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demodOutputData.resize(bufSize);
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}
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int audio_out_size = ceil((double) (bufSize) * audio_resample_ratio) + 512;
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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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if (demodulatorType == DEMOD_TYPE_FM) {
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freqdem_demodulate_block(demodFM, &agcData[0], bufSize, &demodOutputData[0]);
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} else {
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float p;
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unsigned int bitstream;
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switch (demodulatorType.load()) {
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case DEMOD_TYPE_LSB:
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for (int i = 0; i < bufSize; i++) { // Reject upper band
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resamp2_cccf_filter_execute(ssbFilt,inp->data[i],&x,&y);
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ampmodem_demodulate(demodAM, x, &demodOutputData[i]);
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}
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break;
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case DEMOD_TYPE_USB:
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for (int i = 0; i < bufSize; i++) { // Reject lower band
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resamp2_cccf_filter_execute(ssbFilt,inp->data[i],&x,&y);
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ampmodem_demodulate(demodAM, y, &demodOutputData[i]);
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}
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break;
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case DEMOD_TYPE_AM:
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case DEMOD_TYPE_DSB:
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for (int i = 0; i < bufSize; i++) {
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ampmodem_demodulate(demodAM, inp->data[i], &demodOutputData[i]);
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}
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break;
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case DEMOD_TYPE_ASK:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodASK, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodASK, 0.8f);
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break;
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case DEMOD_TYPE_BPSK:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodBPSK, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodBPSK, 0.8f);
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break;
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case DEMOD_TYPE_DPSK:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodDPSK, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodDPSK, 0.8f);
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break;
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case DEMOD_TYPE_PSK:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodPSK, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodPSK, 0.8f);
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break;
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case DEMOD_TYPE_OOK:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodOOK, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodOOK, 0.8f);
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break;
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case DEMOD_TYPE_SQAM:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodSQAM, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodSQAM, 0.8f);
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break;
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case DEMOD_TYPE_ST:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodST, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodST, 0.8f);
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break;
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case DEMOD_TYPE_QAM:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodQAM, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodQAM, 0.5f);
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break;
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case DEMOD_TYPE_QPSK:
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for (int i = 0; i < bufSize; i++) {
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modem_demodulate(demodQPSK, inp->data[i], &bitstream);
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// std::cout << bitstream << std::endl;
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}
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updateDemodulatorLock(demodQPSK, 0.8f);
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break;
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}
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amOutputCeilMA = amOutputCeilMA + (amOutputCeil - amOutputCeilMA) * 0.025;
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amOutputCeilMAA = amOutputCeilMAA + (amOutputCeilMA - amOutputCeilMAA) * 0.025;
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amOutputCeil = 0;
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for (int i = 0; i < bufSize; i++) {
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if (demodOutputData[i] > amOutputCeil) {
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amOutputCeil = demodOutputData[i];
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}
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}
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float gain = 0.5 / amOutputCeilMAA;
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for (int i = 0; i < bufSize; i++) {
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demodOutputData[i] *= gain;
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}
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}
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if (audio_out_size != resampledOutputData.size()) {
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if (resampledOutputData.capacity() < audio_out_size) {
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resampledOutputData.reserve(audio_out_size);
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}
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resampledOutputData.resize(audio_out_size);
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}
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unsigned int numAudioWritten;
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msresamp_rrrf_execute(audioResampler, &demodOutputData[0], bufSize, &resampledOutputData[0], &numAudioWritten);
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if (stereo) {
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if (demodStereoData.size() != bufSize) {
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if (demodStereoData.capacity() < bufSize) {
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demodStereoData.reserve(bufSize);
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}
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demodStereoData.resize(bufSize);
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}
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double freq = (2.0 * M_PI) * ((double) 38000) / ((double) inp->sampleRate);
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if (stereoShiftFrequency != freq) {
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nco_crcf_set_frequency(stereoShifter, freq);
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stereoShiftFrequency = freq;
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}
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for (int i = 0; i < bufSize; i++) {
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firhilbf_r2c_execute(firStereoR2C, demodOutputData[i], &x);
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nco_crcf_mix_down(stereoShifter, x, &y);
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nco_crcf_step(stereoShifter);
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firhilbf_c2r_execute(firStereoC2R, y, &demodStereoData[i]);
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}
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if (audio_out_size != resampledStereoData.size()) {
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if (resampledStereoData.capacity() < audio_out_size) {
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resampledStereoData.reserve(audio_out_size);
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}
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resampledStereoData.resize(audio_out_size);
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}
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msresamp_rrrf_execute(stereoResampler, &demodStereoData[0], bufSize, &resampledStereoData[0], &numAudioWritten);
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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;
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}
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AudioThreadInput *ati = NULL;
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if (audioOutputQueue != NULL) {
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if (!squelchEnabled || (signalLevel >= squelchLevel)) {
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for (outputBuffersI = outputBuffers.begin(); outputBuffersI != outputBuffers.end(); outputBuffersI++) {
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if ((*outputBuffersI)->getRefCount() <= 0) {
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ati = (*outputBuffersI);
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break;
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}
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}
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if (ati == NULL) {
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ati = new AudioThreadInput;
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outputBuffers.push_back(ati);
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}
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ati->sampleRate = audioSampleRate;
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ati->setRefCount(1);
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if (stereo) {
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ati->channels = 2;
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if (ati->data.capacity() < (numAudioWritten * 2)) {
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ati->data.reserve(numAudioWritten * 2);
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}
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ati->data.resize(numAudioWritten * 2);
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for (int i = 0; i < numAudioWritten; i++) {
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float l, r;
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firfilt_rrrf_push(firStereoLeft, (resampledOutputData[i] - (resampledStereoData[i])));
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firfilt_rrrf_execute(firStereoLeft, &l);
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firfilt_rrrf_push(firStereoRight, (resampledOutputData[i] + (resampledStereoData[i])));
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firfilt_rrrf_execute(firStereoRight, &r);
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ati->data[i * 2] = l;
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ati->data[i * 2 + 1] = r;
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}
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} else {
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ati->channels = 1;
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ati->data.assign(resampledOutputData.begin(), resampledOutputData.begin() + numAudioWritten);
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}
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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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audioOutputQueue->push(ati);
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}
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}
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if (ati && audioVisOutputQueue != NULL && audioVisOutputQueue->empty()) {
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int num_vis = DEMOD_VIS_SIZE;
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if (stereo) {
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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) {
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stereoSize = DEMOD_VIS_SIZE;
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}
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ati_vis->data.resize(stereoSize);
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for (int i = 0; i < stereoSize / 2; i++) {
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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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} else {
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ati_vis->channels = 1;
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if (numAudioWritten > bufSize) {
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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(resampledOutputData.begin(), resampledOutputData.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(demodOutputData.begin(), demodOutputData.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 (!threadQueueControl->empty()) {
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int newDemodType = DEMOD_TYPE_NULL;
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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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case DemodulatorThreadControlCommand::DEMOD_THREAD_CMD_CTL_TYPE:
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newDemodType = command.demodType;
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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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if (newDemodType != DEMOD_TYPE_NULL) {
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switch (newDemodType) {
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case DEMOD_TYPE_FM:
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freqdem_reset(demodFM);
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break;
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case DEMOD_TYPE_LSB:
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demodAM = demodAM_LSB;
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ampmodem_reset(demodAM);
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break;
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case DEMOD_TYPE_USB:
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demodAM = demodAM_USB;
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ampmodem_reset(demodAM);
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break;
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case DEMOD_TYPE_DSB:
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demodAM = demodAM_DSB;
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ampmodem_reset(demodAM);
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break;
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case DEMOD_TYPE_AM:
|
|
demodAM = demodAM_DSB_CSP;
|
|
ampmodem_reset(demodAM);
|
|
break;
|
|
// case DEMOD_TYPE_QPSK:
|
|
// std::cout << "reset modem qpsk" << std::endl;
|
|
// modem_reset(demodQPSK);
|
|
// break;
|
|
}
|
|
demodulatorType = newDemodType;
|
|
}
|
|
}
|
|
|
|
inp->decRefCount();
|
|
}
|
|
|
|
if (audioResampler != NULL) {
|
|
msresamp_rrrf_destroy(audioResampler);
|
|
}
|
|
if (stereoResampler != NULL) {
|
|
msresamp_rrrf_destroy(stereoResampler);
|
|
}
|
|
if (firStereoLeft != NULL) {
|
|
firfilt_rrrf_destroy(firStereoLeft);
|
|
}
|
|
if (firStereoRight != NULL) {
|
|
firfilt_rrrf_destroy(firStereoRight);
|
|
}
|
|
|
|
agc_crcf_destroy(iqAutoGain);
|
|
firhilbf_destroy(firStereoR2C);
|
|
firhilbf_destroy(firStereoC2R);
|
|
nco_crcf_destroy(stereoShifter);
|
|
resamp2_cccf_destroy(ssbFilt);
|
|
|
|
while (!outputBuffers.empty()) {
|
|
AudioThreadInput *audioDataDel = outputBuffers.front();
|
|
outputBuffers.pop_front();
|
|
delete audioDataDel;
|
|
}
|
|
|
|
if (audioVisOutputQueue && !audioVisOutputQueue->empty()) {
|
|
AudioThreadInput *dummy_vis;
|
|
audioVisOutputQueue->pop(dummy_vis);
|
|
}
|
|
delete ati_vis;
|
|
|
|
DemodulatorThreadCommand tCmd(DemodulatorThreadCommand::DEMOD_THREAD_CMD_DEMOD_TERMINATED);
|
|
tCmd.context = this;
|
|
threadQueueNotify->push(tCmd);
|
|
std::cout << "Demodulator thread done." << std::endl;
|
|
|
|
#ifdef __APPLE__
|
|
return this;
|
|
#endif
|
|
}
|
|
|
|
void DemodulatorThread::setVisualOutputQueue(DemodulatorThreadOutputQueue *tQueue) {
|
|
audioVisOutputQueue = tQueue;
|
|
}
|
|
|
|
void DemodulatorThread::setAudioOutputQueue(AudioThreadInputQueue *tQueue) {
|
|
audioOutputQueue = tQueue;
|
|
}
|
|
|
|
void DemodulatorThread::terminate() {
|
|
terminated = true;
|
|
DemodulatorThreadPostIQData *inp = new DemodulatorThreadPostIQData; // push dummy to nudge queue
|
|
iqInputQueue->push(inp);
|
|
}
|
|
|
|
void DemodulatorThread::setStereo(bool state) {
|
|
stereo = state;
|
|
std::cout << "Stereo " << (state ? "Enabled" : "Disabled") << std::endl;
|
|
}
|
|
|
|
bool DemodulatorThread::isStereo() {
|
|
return stereo;
|
|
}
|
|
|
|
float DemodulatorThread::getSignalLevel() {
|
|
return signalLevel;
|
|
}
|
|
|
|
void DemodulatorThread::setSquelchLevel(float signal_level_in) {
|
|
if (!squelchEnabled) {
|
|
squelchEnabled = true;
|
|
}
|
|
squelchLevel = signal_level_in;
|
|
}
|
|
|
|
float DemodulatorThread::getSquelchLevel() {
|
|
return squelchLevel;
|
|
}
|
|
|
|
void DemodulatorThread::setDemodulatorType(int demod_type_in) {
|
|
demodulatorType = demod_type_in;
|
|
}
|
|
|
|
int DemodulatorThread::getDemodulatorType() {
|
|
return demodulatorType;
|
|
}
|
|
|
|
void DemodulatorThread::setDemodulatorLock(bool demod_lock_in) {
|
|
demod_lock_in ? currentDemodLock = true : currentDemodLock = false;
|
|
}
|
|
|
|
int DemodulatorThread::getDemodulatorLock() {
|
|
return currentDemodLock;
|
|
}
|
|
|
|
void DemodulatorThread::updateDemodulatorLock(modem demod, float sensitivity) {
|
|
modem_get_demodulator_evm(demod) <= sensitivity ? setDemodulatorLock(true) : setDemodulatorLock(false);
|
|
}
|
|
|