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a/src/ohvolume.cxx b/src/ohvolume.cxx
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static const string sTpProduct("urn:av-openhome-org:service:Volume:1");
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static const string sTpProduct("urn:av-openhome-org:service:Volume:1");
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static const string sIdProduct("urn:av-openhome-org:serviceId:Volume");
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static const string sIdProduct("urn:av-openhome-org:serviceId:Volume");
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OHVolume::OHVolume(UpMpd *dev)
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OHVolume::OHVolume(UpMpd *dev)
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    : UpnpService(sTpProduct, sIdProduct, dev), m_dev(dev)
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    : OHService(sTpProduct, sIdProduct, dev)
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{
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{
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    dev->addActionMapping(this,"Characteristics", 
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    dev->addActionMapping(this,"Characteristics", 
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                          bind(&OHVolume::characteristics, this, _1, _2));
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                          bind(&OHVolume::characteristics, this, _1, _2));
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    dev->addActionMapping(this,"SetVolume", 
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    dev->addActionMapping(this,"SetVolume", 
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                          bind(&OHVolume::setVolume, this, _1, _2));
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                          bind(&OHVolume::setVolume, this, _1, _2));
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    st["Fade"] = "0";
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    st["Fade"] = "0";
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    st["FadeMax"] = "0";
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    st["FadeMax"] = "0";
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    int volume = m_dev->m_rdctl->getvolume_i();
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    int volume = m_dev->m_rdctl->getvolume_i();
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    st["Volume"] = SoapHelp::i2s(volume);
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    st["Volume"] = SoapHelp::i2s(volume);
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    st["Mute"] = volume == 0 ? "1" : "0";
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    st["Mute"] = volume == 0 ? "1" : "0";
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    return true;
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}
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bool OHVolume::getEventData(bool all, std::vector<std::string>& names, 
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                            std::vector<std::string>& values)
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{
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    //LOGDEB("OHVolume::getEventData" << endl);
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    unordered_map<string, string> state, changed;
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    makestate(state);
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    if (all) {
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        changed = state;
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    } else {
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        changed = diffmaps(m_state, state);
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    }
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    m_state = state;
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    for (auto it = changed.begin(); it != changed.end(); it++) {
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        names.push_back(it->first);
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        values.push_back(it->second);
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    }
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    return true;
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    return true;
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}
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}
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int OHVolume::characteristics(const SoapIncoming& sc, SoapOutgoing& data)
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int OHVolume::characteristics(const SoapIncoming& sc, SoapOutgoing& data)
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{
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{