CubicSDR/src/sdr/SDRPostThread.cpp

#include "SDRPostThread.h"
#include "CubicSDRDefs.h"
#include <vector>
#include "CubicSDR.h"

SDRPostThread::SDRPostThread() :
        iqDataInQueue(NULL), iqDataOutQueue(NULL), iqVisualQueue(NULL), terminated(false), dcFilter(NULL), sample_rate(SRATE) {
}

SDRPostThread::~SDRPostThread() {
}

void SDRPostThread::bindDemodulator(DemodulatorInstance *demod) {
    demodulators_add.push_back(demod);
}

void SDRPostThread::removeDemodulator(DemodulatorInstance *demod) {
    if (!demod) {
        return;
    }

    demodulators_remove.push_back(demod);
}

void SDRPostThread::setIQDataInQueue(SDRThreadIQDataQueue* iqDataQueue) {
    iqDataInQueue = iqDataQueue;
}
void SDRPostThread::setIQDataOutQueue(SDRThreadIQDataQueue* iqDataQueue) {
    iqDataOutQueue = iqDataQueue;
}
void SDRPostThread::setIQVisualQueue(SDRThreadIQDataQueue *iqVisQueue) {
    iqVisualQueue = iqVisQueue;
}

void SDRPostThread::threadMain() {
    int n_read;
    double seconds = 0.0;

#ifdef __APPLE__
    pthread_t tID = pthread_self();  // ID of this thread
    int priority = sched_get_priority_max( SCHED_FIFO) - 1;
    sched_param prio = { priority }; // scheduling priority of thread
    pthread_setschedparam(tID, SCHED_FIFO, &prio);
#endif

    dcFilter = iirfilt_crcf_create_dc_blocker(0.0005);

    liquid_float_complex x, y;

    std::cout << "SDR post-processing thread started.." << std::endl;

    while (!terminated) {
        SDRThreadIQData data_in;

        iqDataInQueue.load()->pop(data_in);

        if (data_in.data && data_in.data->size()) {
            SDRThreadIQData dataOut;

            dataOut.frequency = data_in.frequency;
            dataOut.bandwidth = data_in.bandwidth;
            dataOut.data = data_in.data;

            for (int i = 0, iMax = dataOut.data->size() / 2; i < iMax; i++) {
                x.real = (float) (*dataOut.data)[i * 2] / 127.0;
                x.imag = (float) (*dataOut.data)[i * 2 + 1] / 127.0;

                iirfilt_crcf_execute(dcFilter, x, &y);

                (*dataOut.data)[i * 2] = (signed char) floor(y.real * 127.0);
                (*dataOut.data)[i * 2 + 1] = (signed char) floor(y.imag * 127.0);
            }

            if (iqDataOutQueue != NULL) {
                iqDataOutQueue.load()->push(dataOut);
            }

            if (iqVisualQueue != NULL && iqVisualQueue.load()->empty()) {
                SDRThreadIQData visualDataOut;
                visualDataOut.data = new std::vector<signed char>;
                visualDataOut.data->assign(dataOut.data->begin(), dataOut.data->begin() + (FFT_SIZE * 2));
                iqVisualQueue.load()->push(visualDataOut);
            }

            if (demodulators_add.size()) {
                while (!demodulators_add.empty()) {
                    demodulators.push_back(demodulators_add.back());
                    demodulators_add.pop_back();
                }
            }
            if (demodulators_remove.size()) {
                while (!demodulators_remove.empty()) {
                    DemodulatorInstance *demod = demodulators_remove.back();
                    demodulators_remove.pop_back();

                    std::vector<DemodulatorInstance *>::iterator i = std::find(demodulators.begin(), demodulators.end(), demod);

                    if (i != demodulators.end()) {
                        demodulators.erase(i);
                    }
                }
            }

            int activeDemods = 0;
            bool pushedData = false;

            if (demodulators.size()) {

                std::vector<DemodulatorInstance *>::iterator i;
                for (i = demodulators.begin(); i != demodulators.end(); i++) {
                    DemodulatorInstance *demod = *i;

                    if (demod->getParams().frequency != data_in.frequency
                            && abs(data_in.frequency - demod->getParams().frequency) > (int) ((float) ((float) SRATE / 2.0))) {
                        continue;
                    }
                    activeDemods++;
                }

                bool demodActive = false;

                if (demodulators.size()) {
                    DemodulatorThreadIQData *demodDataOut = new DemodulatorThreadIQData;
                    demodDataOut->frequency = data_in.frequency;
                    demodDataOut->bandwidth = data_in.bandwidth;
                    demodDataOut->setRefCount(activeDemods);
                    demodDataOut->data.assign(dataOut.data->begin(), dataOut.data->begin() + dataOut.data->size());

                    std::vector<DemodulatorInstance *>::iterator i;
                    for (i = demodulators.begin(); i != demodulators.end(); i++) {
                        DemodulatorInstance *demod = *i;
                        DemodulatorThreadInputQueue *demodQueue = demod->threadQueueDemod;

                        if (demod->getParams().frequency != data_in.frequency
                                && abs(data_in.frequency - demod->getParams().frequency) > (int) ((float) ((float) SRATE / 2.0))) {
                            if (demod->isActive()) {
                                demod->setActive(false);
                                DemodulatorThreadIQData *dummyDataOut = new DemodulatorThreadIQData;
                                dummyDataOut->frequency = data_in.frequency;
                                dummyDataOut->bandwidth = data_in.bandwidth;
                                demodQueue->push(dummyDataOut);
                            }
                        } else if (!demod->isActive()) {
                            demod->setActive(true);
                        }

                        if (!demod->isActive()) {
                            continue;
                        }

                        demodQueue->push(demodDataOut);
                        pushedData = true;
                    }

                    if (!pushedData) {
                        delete demodDataOut;
                    }
                }
            }
            delete dataOut.data;
        }
    }
    std::cout << "SDR post-processing thread done." << std::endl;
}

void SDRPostThread::terminate() {
    terminated = true;
    SDRThreadIQData dummy;
    iqDataInQueue.load()->push(dummy);
}