/*
   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
   2011, 2012 Her Majesty the Queen in Right of Canada (Communications
   Research Center Canada)

   Copyright (C) 2015
   Matthias P. Braendli, matthias.braendli@mpb.li

   Implementation of FIG0
   */
/*
   This file is part of ODR-DabMux.

   ODR-DabMux 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 3 of the
   License, or (at your option) any later version.

   ODR-DabMux 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 ODR-DabMux.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "fig/FIG0.h"
#include "DabMultiplexer.h"

namespace FIC {

//=========== FIG 0/0 ===========

FillStatus FIG0_0::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;

    if (max_size < 6) {
        fs.num_bytes_written = 0;
        return fs;
    }

    FIGtype0_0 *fig0_0;
    fig0_0 = (FIGtype0_0 *)buf;

    fig0_0->FIGtypeNumber = 0;
    fig0_0->Length = 5;
    fig0_0->CN = 0;
    fig0_0->OE = 0;
    fig0_0->PD = 0;
    fig0_0->Extension = 0;

    fig0_0->EId = htons(m_rti->ensemble->id);
    fig0_0->Change = 0;
    fig0_0->Al = 0;
    fig0_0->CIFcnt_hight = (m_rti->currentFrame / 250) % 20;
    fig0_0->CIFcnt_low = (m_rti->currentFrame % 250);

    fs.complete_fig_transmitted = true;
    fs.num_bytes_written = 6;
    return fs;
}


//=========== FIG 0/1 ===========

FIG0_1::FIG0_1(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_initialised(false)
{
}

FillStatus FIG0_1::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    size_t remaining = max_size;

    if (not m_initialised) {
        subchannelFIG0_1 = m_rti->ensemble->subchannels.end();
        m_initialised = true;
    }

    if (max_size < 6) {
        return fs;
    }

    auto ensemble = m_rti->ensemble;

    FIGtype0_1 *figtype0_1;
    figtype0_1 = (FIGtype0_1*)buf;

    figtype0_1->FIGtypeNumber = 0;
    figtype0_1->Length = 1;
    figtype0_1->CN = 0;
    figtype0_1->OE = 0;
    figtype0_1->PD = 0;
    figtype0_1->Extension = 1;
    buf += 2;
    remaining -= 2;

    // Rotate through the subchannels until there is no more
    // space in the FIG0/1
    if (subchannelFIG0_1 == ensemble->subchannels.end()) {
        subchannelFIG0_1 = ensemble->subchannels.begin();
        fs.complete_fig_transmitted = true;
    }

    for (; subchannelFIG0_1 != ensemble->subchannels.end();
            ++subchannelFIG0_1) {
        dabProtection* protection = &(*subchannelFIG0_1)->protection;

        if ( (protection->form == UEP && remaining < 3) ||
             (protection->form == EEP && remaining < 4) ) {
            break;
        }

        if (protection->form == UEP) {
            FIG_01_SubChannel_ShortF *fig0_1subchShort =
                (FIG_01_SubChannel_ShortF*)buf;
            fig0_1subchShort->SubChId = (*subchannelFIG0_1)->id;

            fig0_1subchShort->StartAdress_high =
                (*subchannelFIG0_1)->startAddress / 256;
            fig0_1subchShort->StartAdress_low =
                (*subchannelFIG0_1)->startAddress % 256;

            fig0_1subchShort->Short_Long_form = 0;
            fig0_1subchShort->TableSwitch = 0;
            fig0_1subchShort->TableIndex =
                protection->uep.tableIndex;

            buf += 3;
            remaining -= 3;
            figtype0_1->Length += 3;
        }
        else if (protection->form == EEP) {
            FIG_01_SubChannel_LongF *fig0_1subchLong1 =
                (FIG_01_SubChannel_LongF*)buf;
            fig0_1subchLong1->SubChId = (*subchannelFIG0_1)->id;

            fig0_1subchLong1->StartAdress_high =
                (*subchannelFIG0_1)->startAddress / 256;
            fig0_1subchLong1->StartAdress_low =
                (*subchannelFIG0_1)->startAddress % 256;

            fig0_1subchLong1->Short_Long_form = 1;
            fig0_1subchLong1->Option = protection->eep.GetOption();
            fig0_1subchLong1->ProtectionLevel =
                protection->level;

            fig0_1subchLong1->Sub_ChannelSize_high =
                getSizeCu(*subchannelFIG0_1) / 256;
            fig0_1subchLong1->Sub_ChannelSize_low =
                getSizeCu(*subchannelFIG0_1) % 256;

            buf += 4;
            remaining -= 4;
            figtype0_1->Length += 4;
        }
    }

    fs.num_bytes_written = max_size - remaining;
    return fs;
}


//=========== FIG 0/2 ===========

FIG0_2::FIG0_2(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_initialised(false)
{
}

FillStatus FIG0_2::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    FIGtype0_2 *fig0_2 = NULL;
    int cur = 0;
    ssize_t remaining = max_size;

    if (not m_initialised) {
        serviceFIG0_2 = m_rti->ensemble->services.end();
        m_initialised = true;
    }

    auto ensemble = m_rti->ensemble;

    // Rotate through the subchannels until there is no more
    // space
    if (serviceFIG0_2 == ensemble->services.end()) {
        serviceFIG0_2 = ensemble->services.begin();
        fs.complete_fig_transmitted = true;
    }

    for (; serviceFIG0_2 != ensemble->services.end();
            ++serviceFIG0_2) {

        // filter out services which have no components
        if ((*serviceFIG0_2)->nbComponent(ensemble->components) == 0) {
            continue;
        }

        // Exclude Fidc type services, TODO why ?
        auto type = (*serviceFIG0_2)->getType(ensemble);
        if (type == subchannel_type_t::Fidc) {
            continue;
        }

        ++cur;

        if (fig0_2 == NULL) {
            fig0_2 = (FIGtype0_2 *)buf;

            fig0_2->FIGtypeNumber = 0;
            fig0_2->Length = 1;
            fig0_2->CN = 0;
            fig0_2->OE = 0;
            fig0_2->PD = (type == subchannel_type_t::Audio) ? 0 : 1;
            fig0_2->Extension = 2;
            buf += 2;
            remaining -= 2;
        }

        if (type == subchannel_type_t::Audio and
                remaining < 3 + 2 *
                (*serviceFIG0_2)->nbComponent(ensemble->components)) {
            break;
        }

        if (type != subchannel_type_t::Audio and
                remaining < 5 + 2 *
                (*serviceFIG0_2)->nbComponent(ensemble->components)) {
            break;
        }

        if (type == subchannel_type_t::Audio) {
            auto fig0_2serviceAudio = (FIGtype0_2_Service*)buf;

            fig0_2serviceAudio->SId = htons((*serviceFIG0_2)->id);
            fig0_2serviceAudio->Local_flag = 0;
            fig0_2serviceAudio->CAId = 0;
            fig0_2serviceAudio->NbServiceComp =
                (*serviceFIG0_2)->nbComponent(ensemble->components);
            buf += 3;
            fig0_2->Length += 3;
            remaining -= 3;
        }
        else {
            auto fig0_2serviceData = (FIGtype0_2_Service_data*)buf;

            fig0_2serviceData->SId = htonl((*serviceFIG0_2)->id);
            fig0_2serviceData->Local_flag = 0;
            fig0_2serviceData->CAId = 0;
            fig0_2serviceData->NbServiceComp =
                (*serviceFIG0_2)->nbComponent(ensemble->components);
            buf += 5;
            fig0_2->Length += 5;
            remaining -= 5;
        }

        int curCpnt = 0;
        for (auto component = getComponent(
                    ensemble->components, (*serviceFIG0_2)->id );
                component != ensemble->components.end();
                component = getComponent(
                    ensemble->components,
                    (*serviceFIG0_2)->id,
                    component )
            ) {
            auto subchannel = getSubchannel(
                    ensemble->subchannels, (*component)->subchId);

            if (subchannel == ensemble->subchannels.end()) {
                etiLog.log(error,
                        "Subchannel %i does not exist for component "
                        "of service %i\n",
                        (*component)->subchId, (*component)->serviceId);
                throw MuxInitException();
            }

            switch ((*subchannel)->type) {
                case subchannel_type_t::Audio:
                    {
                        auto audio_description = (FIGtype0_2_audio_component*)buf;
                        audio_description->TMid    = 0;
                        audio_description->ASCTy   = (*component)->type;
                        audio_description->SubChId = (*subchannel)->id;
                        audio_description->PS      = ((curCpnt == 0) ? 1 : 0);
                        audio_description->CA_flag = 0;
                    }
                    break;
                case subchannel_type_t::DataDmb:
                    {
                        auto data_description = (FIGtype0_2_data_component*)buf;
                        data_description->TMid    = 1;
                        data_description->DSCTy   = (*component)->type;
                        data_description->SubChId = (*subchannel)->id;
                        data_description->PS      = ((curCpnt == 0) ? 1 : 0);
                        data_description->CA_flag = 0;
                    }
                    break;
                case subchannel_type_t::Packet:
                    {
                        auto packet_description = (FIGtype0_2_packet_component*)buf;
                        packet_description->TMid    = 3;
                        packet_description->setSCId((*component)->packet.id);
                        packet_description->PS      = ((curCpnt == 0) ? 1 : 0);
                        packet_description->CA_flag = 0;
                    }
                    break;
                default:
                    etiLog.log(error,
                            "Component type not supported\n");
                    throw MuxInitException();
            }
            buf += 2;
            fig0_2->Length += 2;
            remaining -= 2;
            if (remaining < 0) {
                etiLog.log(error,
                        "Sorry, no space left in FIG 0/2 to insert "
                        "component %i of program service %i.\n",
                        curCpnt, cur);
                throw MuxInitException();
            }
            ++curCpnt;
        }
    }
    fs.num_bytes_written = max_size - remaining;
    return fs;
}


//=========== FIG 0/3 ===========

FIG0_3::FIG0_3(FIGRuntimeInformation *rti) :
    m_rti(rti)
{
}

FillStatus FIG0_3::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    ssize_t remaining = max_size;
    auto ensemble = m_rti->ensemble;

    FIGtype0_3_header *fig0_3_header = NULL;
    FIGtype0_3_data *fig0_3_data = NULL;

    for (auto& component : ensemble->components) {
        auto subchannel = getSubchannel(ensemble->subchannels,
                component->subchId);

        if (subchannel == ensemble->subchannels.end()) {
            etiLog.log(error,
                    "Subchannel %i does not exist for component "
                    "of service %i\n",
                    component->subchId, component->serviceId);
            throw MuxInitException();
        }

        if ((*subchannel)->type != subchannel_type_t::Packet)
            continue;

        if (fig0_3_header == NULL) {
            fig0_3_header = (FIGtype0_3_header*)buf;
            fig0_3_header->FIGtypeNumber = 0;
            fig0_3_header->Length = 1;
            fig0_3_header->CN = 0;
            fig0_3_header->OE = 0;
            fig0_3_header->PD = 0;
            fig0_3_header->Extension = 3;

            buf += 2;
            remaining -= 2;
        }

        /*  Warning: When bit SCCA_flag is unset(0), the multiplexer
         *  R&S does not send the SCCA field. But, in the Factum ETI
         *  analyzer, if this field is not there, it is an error.
         */
        fig0_3_data = (FIGtype0_3_data*)buf;
        fig0_3_data->setSCId(component->packet.id);
        fig0_3_data->rfa = 0;
        fig0_3_data->SCCA_flag = 0;
        // if 0, datagroups are used
        fig0_3_data->DG_flag = !component->packet.datagroup;
        fig0_3_data->rfu = 0;
        fig0_3_data->DSCTy = component->type;
        fig0_3_data->SubChId = (*subchannel)->id;
        fig0_3_data->setPacketAddress(component->packet.address);
        if (m_rti->factumAnalyzer) {
            fig0_3_data->SCCA = 0;
        }

        fig0_3_header->Length += 5;
        buf += 5;
        remaining -= 5;
        if (m_rti->factumAnalyzer) {
            fig0_3_header->Length += 2;
            buf += 2;
            remaining -= 2;
        }

        if (remaining < 0) {
            etiLog.level(error) <<
                    "can't add FIG 0/3 to FIB, "
                    "too many packet services";
            throw MuxInitException();
        }
    }

    fs.num_bytes_written = max_size - remaining;
    fs.complete_fig_transmitted = true;
    return fs;
}

//=========== FIG 0/8 ===========

FIG0_8::FIG0_8(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_initialised(false)
{
}

FillStatus FIG0_8::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    auto ensemble = m_rti->ensemble;
    ssize_t remaining = max_size;

    if (not m_initialised) {
        componentFIG0_8 = m_rti->ensemble->components.end();
        m_initialised = true;
    }

    FIGtype0* fig0 = NULL;

    if (componentFIG0_8 == ensemble->components.end()) {
        componentFIG0_8 = ensemble->components.begin();
        fs.complete_fig_transmitted = true;
    }

    for (; componentFIG0_8 != ensemble->components.end();
            ++componentFIG0_8) {
        auto service = getService(*componentFIG0_8,
                ensemble->services);
        auto subchannel = getSubchannel(ensemble->subchannels,
                (*componentFIG0_8)->subchId);
        if (subchannel == ensemble->subchannels.end()) {
            etiLog.log(error,
                    "Subchannel %i does not exist for component "
                    "of service %i\n",
                    (*componentFIG0_8)->subchId,
                    (*componentFIG0_8)->serviceId);
            throw MuxInitException();
        }

        if (!(*service)->program)
            continue;

        if (fig0 == NULL) {
            fig0 = (FIGtype0*)buf;
            fig0->FIGtypeNumber = 0;
            fig0->Length = 1;
            fig0->CN = 0;
            fig0->OE = 0;
            fig0->PD = 0;
            fig0->Extension = 8;
            buf += 2;
            remaining -= 2;
        }

        if ((*service)->program) {
            if ((*subchannel)->type == subchannel_type_t::Packet) { // Data packet
                if (remaining < 5) {
                    break;
                }
                buf[0] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId) & 0xFF;
                fig0->Length += 2;
                buf += 2;
                remaining -= 2;

                FIGtype0_8_long* definition = (FIGtype0_8_long*)buf;
                memset(definition, 0, 3);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 1;
                definition->setSCId((*componentFIG0_8)->packet.id);
                fig0->Length += 3;
                buf += 3;             // 8 minus rfa
                remaining -= 3;
            }
            else {    // Audio, data stream or FIDC
                if (remaining < 4) {
                    break;
                }
                buf[0] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId) & 0xFF;

                fig0->Length += 2;
                buf += 2;
                remaining -= 2;

                FIGtype0_8_short* definition = (FIGtype0_8_short*)buf;
                memset(definition, 0, 2);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 0;
                definition->MscFic = 0;
                definition->Id = (*componentFIG0_8)->subchId;
                fig0->Length += 2;
                buf += 2;             // 4 minus rfa
                remaining -= 2;
            }
        }
        else { // Data
            if ((*subchannel)->type == subchannel_type_t::Packet) { // Data packet
                if (remaining < 7) {
                    break;
                }
                buf[0] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId) & 0xFF;
                fig0->Length += 4;
                buf += 4;
                remaining -= 4;

                FIGtype0_8_long* definition = (FIGtype0_8_long*)buf;
                memset(definition, 0, 3);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 1;
                definition->setSCId((*componentFIG0_8)->packet.id);
                fig0->Length += 3;
                buf += 3;             // 8 minus rfa
                remaining -= 3;
            }
            else {    // Audio, data stream or FIDC
                if (remaining < 6 ) {
                    break;
                }
                buf[0] = ((*componentFIG0_8)->serviceId >> 8) & 0xFF;
                buf[1] = ((*componentFIG0_8)->serviceId) & 0xFF;
                fig0->Length += 4;
                buf += 4;
                remaining -= 4;

                FIGtype0_8_short* definition = (FIGtype0_8_short*)buf;
                memset(definition, 0, 2);
                definition->ext = 0;    // no rfa
                definition->SCIdS = (*componentFIG0_8)->SCIdS;
                definition->LS = 0;
                definition->MscFic = 0;
                definition->Id = (*componentFIG0_8)->subchId;
                fig0->Length += 2;
                buf += 2;             // 4 minus rfa
                remaining -= 2;
            }
        }
    }

    fs.num_bytes_written = max_size - remaining;
    return fs;
}

//=========== FIG 0/9 ===========
FIG0_9::FIG0_9(FIGRuntimeInformation *rti) :
    m_rti(rti) {}

FillStatus FIG0_9::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    auto ensemble = m_rti->ensemble;
    size_t remaining = max_size;

    if (remaining < 5) {
        fs.num_bytes_written = 0;
        return fs;
    }

    auto fig0_9 = (FIGtype0_9*)buf;
    fig0_9->FIGtypeNumber = 0;
    fig0_9->Length = 4;
    fig0_9->CN = 0;
    fig0_9->OE = 0;
    fig0_9->PD = 0;
    fig0_9->Extension = 9;

    fig0_9->ext = 0;
    fig0_9->lto = 0; // Unique LTO for ensemble

    if (ensemble->lto_auto) {
        time_t now = time(NULL);
        struct tm* ltime = localtime(&now);
        time_t now2 = timegm(ltime);
        ensemble->lto = (now2 - now) / 1800;
    }

    if (ensemble->lto >= 0) {
        fig0_9->ensembleLto = ensemble->lto;
    }
    else {
        /* Convert to 1-complement representation */
        fig0_9->ensembleLto = (-ensemble->lto) | (1<<5);
    }

    fig0_9->ensembleEcc = ensemble->ecc;
    fig0_9->tableId = ensemble->international_table;
    buf += 5;
    remaining -= 5;

    fs.num_bytes_written = max_size - remaining;
    fs.complete_fig_transmitted = true;
    return fs;
}

//=========== FIG 0/10 ===========

FIG0_10::FIG0_10(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_watermarkSize(0),
    m_watermarkPos(0)
{
    uint8_t buffer[sizeof(m_watermarkData) / 2];
    snprintf((char*)buffer, sizeof(buffer),
            "%s %s, compiled at %s, %s",
            PACKAGE_NAME,
#if defined(GITVERSION)
            GITVERSION,
#else
            PACKAGE_VERSION,
#endif
            __DATE__, __TIME__);

    memset(m_watermarkData, 0, sizeof(m_watermarkData));
    m_watermarkData[0] = 0x55; // Sync
    m_watermarkData[1] = 0x55;
    m_watermarkSize = 16;
    for (unsigned i = 0; i < strlen((char*)buffer); ++i) {
        for (int j = 0; j < 8; ++j) {
            uint8_t bit = (buffer[m_watermarkPos >> 3] >> (7 - (m_watermarkPos & 0x07))) & 1;
            m_watermarkData[m_watermarkSize >> 3] |= bit << (7 - (m_watermarkSize & 0x07));
            ++m_watermarkSize;
            bit = 1;
            m_watermarkData[m_watermarkSize >> 3] |= bit << (7 - (m_watermarkSize & 0x07));
            ++m_watermarkSize;
            ++m_watermarkPos;
        }
    }
    m_watermarkPos = 0;
}

FillStatus FIG0_10::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    auto ensemble = m_rti->ensemble;
    size_t remaining = max_size;

    if (remaining < 6) {
        fs.num_bytes_written = 0;
        return fs;
    }

    //Time and country identifier
    auto fig0_10 = (FIGtype0_10 *)buf;

    fig0_10->FIGtypeNumber = 0;
    fig0_10->Length = 5;
    fig0_10->CN = 0;
    fig0_10->OE = 0;
    fig0_10->PD = 0;
    fig0_10->Extension = 10;
    buf += 2;

    tm* timeData;
    timeData = gmtime(&m_rti->date);

    fig0_10->RFU = 0;
    fig0_10->setMJD(gregorian2mjd(timeData->tm_year + 1900,
                timeData->tm_mon + 1,
                timeData->tm_mday));
    fig0_10->LSI = 0;
    fig0_10->ConfInd = (m_watermarkData[m_watermarkPos >> 3] >>
            (7 - (m_watermarkPos & 0x07))) & 1;
    if (++m_watermarkPos == m_watermarkSize) {
        m_watermarkPos = 0;
    }
    fig0_10->UTC = 0;
    fig0_10->setHours(timeData->tm_hour);
    fig0_10->Minutes = timeData->tm_min;
    buf += 4;
    remaining -= 6;

    fs.num_bytes_written = max_size - remaining;
    fs.complete_fig_transmitted = true;
    return fs;
}

//=========== FIG 0/13 ===========

FIG0_13::FIG0_13(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_initialised(false),
    m_transmit_programme(false)
{
}

FillStatus FIG0_13::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    auto ensemble = m_rti->ensemble;
    ssize_t remaining = max_size;

    if (not m_initialised) {
        componentFIG0_13 = m_rti->ensemble->components.end();
        m_initialised = true;
    }

    FIGtype0* fig0 = NULL;

    if (componentFIG0_13 == ensemble->components.end()) {
        componentFIG0_13 = ensemble->components.begin();

        // The full database is sent every second full loop
        fs.complete_fig_transmitted = m_transmit_programme;

        m_transmit_programme = not m_transmit_programme;
        // Alternate between data and and programme FIG0/13,
        // do not mix fig0 with PD=0 with extension 13 stuff
        // that actually needs PD=1, and vice versa
    }

    for (; componentFIG0_13 != ensemble->components.end();
            ++componentFIG0_13) {

        auto subchannel = getSubchannel(ensemble->subchannels,
                (*componentFIG0_13)->subchId);

        if (subchannel == ensemble->subchannels.end()) {
            etiLog.log(error,
                    "Subchannel %i does not exist for component "
                    "of service %i\n",
                    (*componentFIG0_13)->subchId,
                    (*componentFIG0_13)->serviceId);
            throw MuxInitException();
        }

        if (    m_transmit_programme &&
                (*subchannel)->type == subchannel_type_t::Audio &&
                (*componentFIG0_13)->audio.uaType != 0xffff) {
            if (fig0 == NULL) {
                fig0 = (FIGtype0*)buf;
                fig0->FIGtypeNumber = 0;
                fig0->Length = 1;
                fig0->CN = 0;
                fig0->OE = 0;
                fig0->PD = 0;
                fig0->Extension = 13;
                buf += 2;
                remaining -= 2;
            }

            if (remaining < 3+4+11) {
                break;
            }

            FIG0_13_shortAppInfo* info = (FIG0_13_shortAppInfo*)buf;
            info->SId = htonl((*componentFIG0_13)->serviceId) >> 16;
            info->SCIdS = (*componentFIG0_13)->SCIdS;
            info->No = 1;
            buf += 3;
            remaining -= 3;
            fig0->Length += 3;

            FIG0_13_app* app = (FIG0_13_app*)buf;
            app->setType((*componentFIG0_13)->audio.uaType);
            app->length = 2;
            app->xpad = htons(0x0c3c);
            /* xpad meaning
               CA        = 0
               CAOrg     = 0
               Rfu       = 0
               AppTy(5)  = 12 (MOT, start of X-PAD data group)
               DG        = 0 (MSC data groups used)
               Rfu       = 0
               DSCTy(6)  = 60 (MOT)
               */

            buf += 2 + app->length;
            remaining -= 2 + app->length;
            fig0->Length += 2 + app->length;
        }
        else if (!m_transmit_programme &&
                (*subchannel)->type == subchannel_type_t::Packet &&
                (*componentFIG0_13)->packet.appType != 0xffff) {

            if (fig0 == NULL) {
                fig0 = (FIGtype0*)buf;
                fig0->FIGtypeNumber = 0;
                fig0->Length = 1;
                fig0->CN = 0;
                fig0->OE = 0;
                fig0->PD = 1;
                fig0->Extension = 13;
                buf += 2;
                remaining -= 2;
            }

            if (remaining < 5+2) {
                break;
            }

            FIG0_13_longAppInfo* info = (FIG0_13_longAppInfo*)buf;
            info->SId = htonl((*componentFIG0_13)->serviceId);
            info->SCIdS = (*componentFIG0_13)->SCIdS;
            info->No = 1;
            buf += 5;
            remaining -= 5;
            fig0->Length += 5;

            FIG0_13_app* app = (FIG0_13_app*)buf;
            app->setType((*componentFIG0_13)->packet.appType);
            app->length = 0;
            buf += 2;
            remaining -= 2;
            fig0->Length += 2;
        }
    }

    fs.num_bytes_written = max_size - remaining;
    return fs;
}

//=========== FIG 0/17 ===========

FIG0_17::FIG0_17(FIGRuntimeInformation *rti) :
    m_rti(rti),
    m_initialised(false)
{
}

FillStatus FIG0_17::fill(uint8_t *buf, size_t max_size)
{
    FillStatus fs;
    ssize_t remaining = max_size;

    if (not m_initialised) {
        serviceFIG0_17 = m_rti->ensemble->services.end();
        m_initialised = true;
    }

    auto ensemble = m_rti->ensemble;

    FIGtype0* fig0 = NULL;

    if (serviceFIG0_17 == ensemble->services.end()) {
        serviceFIG0_17 = ensemble->services.begin();
        fs.complete_fig_transmitted = true;
    }

    for (; serviceFIG0_17 != ensemble->services.end();
            ++serviceFIG0_17) {

        if (    (*serviceFIG0_17)->pty == 0 &&
                (*serviceFIG0_17)->language == 0) {
            continue;
        }

        if (fig0 == NULL) {
            fig0 = (FIGtype0*)buf;
            fig0->FIGtypeNumber = 0;
            fig0->Length = 1;
            fig0->CN = 0;
            fig0->OE = 0;
            fig0->PD = 0;
            fig0->Extension = 17;
            buf += 2;
            remaining -= 2;
        }

        if ((*serviceFIG0_17)->language == 0) {
            if (remaining < 4) {
                break;
            }
        }
        else {
            if (remaining < 5) {
                break;
            }
        }

        auto programme = (FIGtype0_17_programme*)buf;
        programme->SId = htons((*serviceFIG0_17)->id);
        programme->SD = 1;
        programme->PS = 0;
        programme->L = (*serviceFIG0_17)->language != 0;
        programme->CC = 0;
        programme->Rfa = 0;
        programme->NFC = 0;
        if ((*serviceFIG0_17)->language == 0) {
            buf[3] = (*serviceFIG0_17)->pty;
            fig0->Length += 4;
            buf += 4;
            remaining -= 4;
        }
        else {
            buf[3] = (*serviceFIG0_17)->language;
            buf[4] = (*serviceFIG0_17)->pty;
            fig0->Length += 5;
            buf += 5;
            remaining -= 5;
        }
    }

    fs.num_bytes_written = max_size - remaining;
    return fs;
}

} // namespace FIC