C++ DTVMultiplex类代码示例

void DTVConfParser::AddChannel(const DTVMultiplex &mux, DTVChannelInfo &chan)
{
    for (uint i = 0; i < channels.size(); i++)
    {
        if (channels[i] == mux)
        {
            channels[i].channels.push_back(chan);

            VERBOSE(VB_IMPORTANT, "Imported channel: "<<chan.toString()
                    <<" on "<<mux.toString());
            return;
        }
    }

    channels.push_back(mux);
    channels.back().channels.push_back(chan);

    VERBOSE(VB_IMPORTANT, "Imported channel: "<<chan.toString()
            <<" on "<<mux.toString());
}

/**
 *  \brief Tunes the card to a frequency but does not deal with PIDs.
 *
 *   This is used by DVB Channel Scanner, the EIT Parser, and by TVRec.
 *
 *  \param tuning      Info on transport to tune to
 *  \param inputid     Optional, forces specific input (for DiSEqC)
 *  \param force_reset If true, frequency tuning is done
 *                     even if it should not be needed.
 *  \param same_input  Optional, doesn't change input (for retuning).
 *  \return true on success, false on failure
 */
bool DVBChannel::Tune(const DTVMultiplex &tuning,
                      uint inputid,
                      bool force_reset,
                      bool same_input)
{
    QMutexLocker lock(&tune_lock);
    QMutexLocker locker(&hw_lock);

    DVBChannel *master = GetMasterLock();
    if (master != this)
    {
        LOG(VB_CHANNEL, LOG_INFO, LOC + "tuning on slave channel");
        SetSIStandard(tuning.sistandard);
        bool ok = master->Tune(tuning, inputid, force_reset, false);
        ReturnMasterLock(master);
        return ok;
    }
    ReturnMasterLock(master); // if we're the master we don't need this lock..


    int intermediate_freq = 0;
    bool can_fec_auto = false;
    bool reset = (force_reset || first_tune);

    if (tunerType.IsDiSEqCSupported() && !diseqc_tree)
    {
        LOG(VB_GENERAL, LOG_ERR, LOC +
            "DVB-S needs device tree for LNB handling");
        return false;
    }

    desired_tuning = tuning;

    if (fd_frontend < 0)
    {
        LOG(VB_GENERAL, LOG_ERR, LOC + "Tune(): Card not open!");

        return false;
    }

    // Remove any events in queue before tuning.
    drain_dvb_events(fd_frontend);

    // send DVB-S setup
    if (diseqc_tree)
    {
        // configure for new input
        if (!same_input)
            diseqc_settings.Load(inputid);

        // execute diseqc commands
        if (!diseqc_tree->Execute(diseqc_settings, tuning))
        {
            LOG(VB_GENERAL, LOG_ERR, LOC +
                "Tune(): Failed to setup DiSEqC devices");
            return false;
        }

        // retrieve actual intermediate frequency
        DiSEqCDevLNB *lnb = diseqc_tree->FindLNB(diseqc_settings);
        if (!lnb)
        {
            LOG(VB_GENERAL, LOG_ERR, LOC +
                "Tune(): No LNB for this configuration");
            return false;
        }

        if (lnb->GetDeviceID() != last_lnb_dev_id)
        {
            last_lnb_dev_id = lnb->GetDeviceID();
            // make sure we tune to frequency, if the lnb has changed
            reset = first_tune = true;
        }

        intermediate_freq = lnb->GetIntermediateFrequency(
            diseqc_settings, tuning);

        // if card can auto-FEC, use it -- sometimes NITs are inaccurate
        if (capabilities & FE_CAN_FEC_AUTO)
            can_fec_auto = true;

        // Check DVB-S intermediate frequency here since it requires a fully
        // initialized diseqc tree
        CheckFrequency(intermediate_freq);
    }

    LOG(VB_CHANNEL, LOG_INFO, LOC + "Old Params: " + prev_tuning.toString() +
            "\n\t\t\t" + LOC + "New Params: " + tuning.toString());
//.........这里部分代码省略.........

void DVBChannel::CheckOptions(DTVMultiplex &tuning) const
{
    if ((tuning.inversion == DTVInversion::kInversionAuto) &&
        !(capabilities & FE_CAN_INVERSION_AUTO))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "'Auto' inversion parameter unsupported by this driver, "
            "falling back to 'off'.");
        tuning.inversion = DTVInversion::kInversionOff;
    }

    // DVB-S needs a fully initialized diseqc tree and is checked later in Tune
    if (!diseqc_tree)
        CheckFrequency(tuning.frequency);

    if (tunerType.IsFECVariable() &&
        symbol_rate_minimum && symbol_rate_maximum &&
        (symbol_rate_minimum <= symbol_rate_maximum) &&
        (tuning.symbolrate < symbol_rate_minimum ||
         tuning.symbolrate > symbol_rate_maximum))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            QString("Symbol Rate setting (%1) is out of range (min/max:%2/%3)")
                .arg(tuning.symbolrate)
                .arg(symbol_rate_minimum).arg(symbol_rate_maximum));
    }

    if (tunerType.IsFECVariable() && !CheckCodeRate(tuning.fec))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "Selected fec_inner parameter unsupported by this driver.");
    }

    if (tunerType.IsModulationVariable() && !CheckModulation(tuning.modulation))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
           "Selected modulation parameter unsupported by this driver.");
    }

    if (DTVTunerType::kTunerTypeDVBT != tunerType)
    {
        LOG(VB_CHANNEL, LOG_INFO, LOC + tuning.toString());
        return;
    }

    // Check OFDM Tuning params

    if (!CheckCodeRate(tuning.hp_code_rate))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "Selected code_rate_hp parameter unsupported by this driver.");
    }

    if (!CheckCodeRate(tuning.lp_code_rate))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "Selected code_rate_lp parameter unsupported by this driver.");
    }

    if ((tuning.bandwidth == DTVBandwidth::kBandwidthAuto) &&
        !(capabilities & FE_CAN_BANDWIDTH_AUTO))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "'Auto' bandwidth parameter unsupported by this driver.");
    }

    if ((tuning.trans_mode == DTVTransmitMode::kTransmissionModeAuto) &&
        !(capabilities & FE_CAN_TRANSMISSION_MODE_AUTO))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "'Auto' transmission_mode parameter unsupported by this driver.");
    }

    if ((tuning.guard_interval == DTVGuardInterval::kGuardIntervalAuto) &&
        !(capabilities & FE_CAN_GUARD_INTERVAL_AUTO))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "'Auto' guard_interval parameter unsupported by this driver.");
    }

    if ((tuning.hierarchy == DTVHierarchy::kHierarchyAuto) &&
        !(capabilities & FE_CAN_HIERARCHY_AUTO))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "'Auto' hierarchy parameter unsupported by this driver. ");
    }

    if (!CheckModulation(tuning.modulation))
    {
        LOG(VB_GENERAL, LOG_WARNING, LOC +
            "Selected modulation parameter unsupported by this driver.");
    }

    LOG(VB_CHANNEL, LOG_INFO, LOC + tuning.toString());
}

bool DVBChannel::SetChannelByString(const QString &channum)
{
    QString tmp     = QString("SetChannelByString(%1): ").arg(channum);
    QString loc     = LOC + tmp;
    QString loc_err = LOC_ERR + tmp;

    VERBOSE(VB_CHANNEL, loc);

    if (!IsOpen())
    {
        VERBOSE(VB_IMPORTANT, loc_err + "Channel object "
                "will not open, cannot change channels.");

        ClearDTVInfo();
        return false;
    }

    ClearDTVInfo();

    QString inputName;
    if (!CheckChannel(channum, inputName))
    {
        VERBOSE(VB_IMPORTANT, loc_err +
                "CheckChannel failed.\n\t\t\tPlease verify the channel "
                "in the 'mythtv-setup' Channel Editor.");

        return false;
    }

    // If CheckChannel filled in the inputName we need to change inputs.
    if (!inputName.isEmpty() && (nextInputID == m_currentInputID))
        nextInputID = GetInputByName(inputName);

    // Get the input data for the channel
    int inputid = (nextInputID >= 0) ? nextInputID : m_currentInputID;
    InputMap::const_iterator it = m_inputs.find(inputid);
    if (it == m_inputs.end())
        return false;

    uint mplexid_restriction;
    if (!IsInputAvailable(inputid, mplexid_restriction))
    {
        VERBOSE(VB_IMPORTANT, loc_err + "Input is not available");
        return false;
    }

    // Get the input data for the channel
    QString tvformat, modulation, freqtable, freqid, si_std;
    int finetune;
    uint64_t frequency;
    int mpeg_prog_num;
    uint atsc_major, atsc_minor, mplexid, tsid, netid;

    if (!ChannelUtil::GetChannelData(
        (*it)->sourceid, channum,
        tvformat, modulation, freqtable, freqid,
        finetune, frequency,
        si_std, mpeg_prog_num, atsc_major, atsc_minor, tsid, netid,
        mplexid, m_commfree))
    {
        VERBOSE(VB_IMPORTANT, loc_err +
                "Unable to find channel in database.");

        return false;
    }

    if (mplexid_restriction && (mplexid != mplexid_restriction))
    {
        VERBOSE(VB_IMPORTANT, loc_err + "Multiplex is not available");
        return false;
    }

    // Initialize basic the tuning parameters
    DTVMultiplex tuning;
    if (!mplexid || !tuning.FillFromDB(tunerType, mplexid))
    {
        VERBOSE(VB_IMPORTANT, loc_err +
                "Failed to initialize multiplex options");

        return false;
    }

    SetDTVInfo(atsc_major, atsc_minor, netid, tsid, mpeg_prog_num);

    // Try to fix any problems with the multiplex
    CheckOptions(tuning);

    if (!Tune(tuning, inputid))
    {
        VERBOSE(VB_IMPORTANT, loc_err + "Tuning to frequency.");

        ClearDTVInfo();
        return false;
    }

    QString tmpX = channum; tmpX.detach();
    m_curchannelname = tmpX;

    VERBOSE(VB_CHANNEL, loc + "Tuned to frequency.");

//.........这里部分代码省略.........

void ScanWizard::SetPage(const QString &pageTitle)
{
    LOG(VB_CHANSCAN, LOG_INFO, QString("SetPage(%1)").arg(pageTitle));
    if (pageTitle != ChannelScannerGUI::kTitle)
    {
        scannerPane->quitScanning();
        return;
    }

    QMap<QString,QString> start_chan;
    DTVTunerType parse_type = DTVTunerType::kTunerTypeUnknown;

    uint    cardid    = configPane->GetCardID();
    QString inputname = configPane->GetInputName();
    uint    sourceid  = configPane->GetSourceID();
    int     scantype  = configPane->GetScanType();
    bool    do_scan   = true;

    LOG(VB_CHANSCAN, LOG_INFO, LOC + "SetPage(): " +
        QString("type(%1) cardid(%2) inputname(%3)")
            .arg(scantype).arg(cardid).arg(inputname));

    if (scantype == ScanTypeSetting::DVBUtilsImport)
    {
        scannerPane->ImportDVBUtils(sourceid, lastHWCardType,
                                    configPane->GetFilename());
    }
    else if (scantype == ScanTypeSetting::NITAddScan_DVBT)
    {
        start_chan = configPane->GetStartChan();
        parse_type = DTVTunerType::kTunerTypeDVBT;
    }
    else if (scantype == ScanTypeSetting::NITAddScan_DVBS)
    {
        start_chan = configPane->GetStartChan();
        parse_type = DTVTunerType::kTunerTypeDVBS1;
    }
    else if (scantype == ScanTypeSetting::NITAddScan_DVBS2)
    {
        start_chan = configPane->GetStartChan();
        parse_type = DTVTunerType::kTunerTypeDVBS2;
    }
    else if (scantype == ScanTypeSetting::NITAddScan_DVBC)
    {
        start_chan = configPane->GetStartChan();
        parse_type = DTVTunerType::kTunerTypeDVBC;
    }
    else if (scantype == ScanTypeSetting::IPTVImport)
    {
        do_scan = false;
        scannerPane->ImportM3U(cardid, inputname, sourceid);
    }
    else if ((scantype == ScanTypeSetting::FullScan_ATSC)     ||
             (scantype == ScanTypeSetting::FullTransportScan) ||
             (scantype == ScanTypeSetting::TransportScan)     ||
             (scantype == ScanTypeSetting::CurrentTransportScan) ||
             (scantype == ScanTypeSetting::FullScan_DVBC)     ||
             (scantype == ScanTypeSetting::FullScan_DVBT)     ||
             (scantype == ScanTypeSetting::FullScan_Analog))
    {
        ;
    }
    else if (scantype == ScanTypeSetting::ExistingScanImport)
    {
        do_scan = false;
        uint scanid = configPane->GetScanID();
        ScanDTVTransportList transports = LoadScan(scanid);
        ChannelImporter ci(true, true, true, true, false,
                           configPane->DoFreeToAirOnly(),
                           configPane->GetServiceRequirements());
        ci.Process(transports);
    }
    else
    {
        do_scan = false;
        LOG(VB_CHANSCAN, LOG_ERR, LOC + "SetPage(): " +
            QString("type(%1) src(%2) cardid(%3) not handled")
                .arg(scantype).arg(sourceid).arg(cardid));

        MythPopupBox::showOkPopup(
            GetMythMainWindow(), tr("ScanWizard"),
            tr("Programmer Error, see console"));
    }

    // Just verify what we get from the UI...
    DTVMultiplex tuning;
    if ((parse_type != DTVTunerType::kTunerTypeUnknown) &&
        !tuning.ParseTuningParams(
            parse_type,
            start_chan["frequency"],      start_chan["inversion"],
            start_chan["symbolrate"],     start_chan["fec"],
            start_chan["polarity"],
            start_chan["coderate_hp"],    start_chan["coderate_lp"],
            start_chan["constellation"],  start_chan["trans_mode"],
            start_chan["guard_interval"], start_chan["hierarchy"],
            start_chan["modulation"],     start_chan["bandwidth"],
            start_chan["mod_sys"],        start_chan["rolloff"]))
    {
        MythPopupBox::showOkPopup(
            GetMythMainWindow(), tr("ScanWizard"),
//.........这里部分代码省略.........