root/experimental/components/Demodulator/src/Demodulator.cpp @ 4005

/****************************************************************************

Copyright 2007 Virginia Polytechnic Institute and State University

This file is part of the OSSIE Demodulator.

OSSIE Demodulator is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

OSSIE Demodulator is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with OSSIE Demodulator; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

****************************************************************************/


#include <string>
#include <iostream>
#include "Demodulator.h"

Demodulator_i::Demodulator_i(const char *uuid, omni_condition *condition) : 
    Resource_impl(uuid), component_running(condition)
{
    dataIn_0 = new standardInterfaces_i::complexShort_p("SymbolsIn");
    dataOut_0 = new standardInterfaces_i::realChar_u("DataBitsOut");

    //Create the thread for the writer's processing function 
    processing_thread = new omni_thread(Run, (void *) this);

    //Start the thread containing the writer's processing function 
    processing_thread->start();

}

Demodulator_i::~Demodulator_i(void)
{   
    delete dataIn_0;
    delete dataOut_0;
}

// Static function for omni thread
void Demodulator_i::Run( void * data )
{
    ((Demodulator_i*)data)->ProcessData();
}

CORBA::Object_ptr Demodulator_i::getPort( const char* portName ) throw (
    CORBA::SystemException, CF::PortSupplier::UnknownPort)
{
    DEBUG(3, Demodulator, "getPort() invoked with " << portName)
    
    CORBA::Object_var p;

    p = dataIn_0->getPort(portName);

    if (!CORBA::is_nil(p))
        return p._retn();

    p = dataOut_0->getPort(portName);

    if (!CORBA::is_nil(p))
        return p._retn();

    // Requested port not recognized
    throw CF::PortSupplier::UnknownPort();
}

void Demodulator_i::start() throw (CORBA::SystemException, 
    CF::Resource::StartError)
{
    DEBUG(3, Demodulator, "start() invoked")
}

void Demodulator_i::stop() throw (CORBA::SystemException, CF::Resource::StopError) 
{  
    DEBUG(3, Demodulator, "stop() invoked")
}

void Demodulator_i::releaseObject() throw (CORBA::SystemException,
    CF::LifeCycle::ReleaseError)
{
    DEBUG(3, Demodulator, "releaseObject() invoked")
    
    component_running->signal();
}

void Demodulator_i::initialize() throw (CF::LifeCycle::InitializeError,
    CORBA::SystemException)
{
    DEBUG(3, Demodulator, "initialize() invoked")
}

void Demodulator_i::configure(const CF::Properties& props)
throw (CORBA::SystemException,
    CF::PropertySet::InvalidConfiguration,
    CF::PropertySet::PartialConfiguration)
{
    DEBUG(3, Demodulator, "configure() invoked")
    
    std::cout << "props length : " << props.length() << std::endl;

    for (unsigned int i = 0; i <props.length(); i++) {
        std::cout << "Property id : " << props[i].id << std::endl;

        if (strcmp(props[i].id, "DCE:df4641d3-5c25-47d4-8d0b-89a069ac0248") == 0) {
            // Demodulation scheme
            const char * prop_str;
            props[i].value >>= prop_str;

            // Set appropriate modulation function
            if ( strcmp(prop_str, "BPSK") == 0 ) {
                SetModulationScheme( MOD_BPSK );
            } else if ( strcmp(prop_str, "QPSK") == 0 ) {
                SetModulationScheme( MOD_QPSK );
            } else if ( strcmp(prop_str, "8PSK") == 0 ) {
                SetModulationScheme( MOD_8PSK );
            } else if ( strcmp(prop_str, "16QAM") == 0 ) {
                SetModulationScheme( MOD_16QAM );
            } else if ( strcmp(prop_str, "4PAM") == 0 ) {
                SetModulationScheme( MOD_4PAM );
            } else {
                // unknown property
                std::cerr << "ERROR: Demodulator::configure() unknown mod. scheme "
                          << prop_str << std::endl;
                throw CF::PropertySet::InvalidConfiguration();
            }
            ///\todo catch exception thrown by DemodulatorDSP::ConfigureModulationScheme()

        } else {
            // unknown property
            std::cerr << "ERROR: Demodulator::configure() unknown property" << std::endl;
            throw CF::PropertySet::InvalidConfiguration();
        }
    }

}

void Demodulator_i::ProcessData()
{
    DEBUG(3, Demodulator, "ProcessData() invoked")

    PortTypes::CharSequence bits_out;

    PortTypes::ShortSequence *I_in(NULL), *Q_in(NULL);
    unsigned int N_in(0), N_out(0);

    unsigned int i;
    char * b(NULL);
    short * I(NULL), * Q(NULL);

    while( true ) {
        // Get data from port
        dataIn_0->getData(I_in, Q_in);

        // Read input data length
        N_in = I_in->length();
        N_out = N_in * bitsPerSymbol;

        // Configure output data length
        bits_out.length(N_out);

        // Copy data
        ///\todo Copying data is incredibly inefficient; need to initialize
        /// CORBA array on buffer and vise versa
        b = new char[N_out];
        I = new short[N_in];
        Q = new short[N_in];

        for (i=0; i<N_in; i++) {
            I[i] = (*I_in)[i];
            Q[i] = (*Q_in)[i];
        }

        // Signal processing goes here
        DemodulateSequence(I, Q, N_in, b);

        for (i=0; i<N_out; i++) {
            bits_out[i] = b[i];
        }

        dataIn_0->bufferEmptied();
        dataOut_0->pushPacket(bits_out);
    }

    delete [] b;
    delete [] I;
    delete [] Q;

}