CubicSDR/src/modules/modem/digital/ModemSQAM.cpp

#include "ModemSQAM.h"

ModemSQAM::ModemSQAM() {
    demodSQAM32 = modem_create(LIQUID_MODEM_SQAM32);
    demodSQAM128 = modem_create(LIQUID_MODEM_SQAM128);
    demodulatorCons.store(32);
    currentDemodCons.store(0);
    updateDemodulatorCons(32);
}

Modem *ModemSQAM::factory() {
    return new ModemSQAM;
}

ModemSQAM::~ModemSQAM() {
    modem_destroy(demodSQAM32);
    modem_destroy(demodSQAM128);
}

void ModemSQAM::updateDemodulatorCons(int cons) {
    if (currentDemodCons.load() != cons) {
        currentDemodCons = cons;
        
        switch (demodulatorCons.load()) {
            case 2:
                demodSQAM = demodSQAM32;
                updateDemodulatorCons(32);
                break;
            case 4:
                demodSQAM = demodSQAM32;
                updateDemodulatorCons(32);
                break;
            case 8:
                demodSQAM = demodSQAM32;
                updateDemodulatorCons(32);
                break;
            case 16:
                demodSQAM = demodSQAM32;
                updateDemodulatorCons(32);
                break;
            case 32:
                demodSQAM = demodSQAM32;
                updateDemodulatorCons(32);
                break;
            case 64:
                demodSQAM = demodSQAM32;
                updateDemodulatorCons(32);
                break;
            case 128:
                demodSQAM = demodSQAM128;
                updateDemodulatorCons(128);
                break;
            case 256:
                demodSQAM = demodSQAM128;
                updateDemodulatorCons(128);
                break;
            default:
                demodSQAM = demodSQAM32;
                break;
        }
    }
}

void ModemSQAM::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *audioOut) {
    ModemKitDigital *dkit = (ModemKitDigital *)kit;

    digitalStart(dkit, demodSQAM, input);
    
    for (int i = 0, bufSize = input->data.size(); i < bufSize; i++) {
        modem_demodulate(demodSQAM, input->data[i], &demodOutputDataDigital[i]);
    }
    updateDemodulatorLock(demodSQAM, 0.005f);
    
    digitalFinish(dkit, demodSQAM);
}