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+++ b/upmpd/ohplaylist.cxx
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+/* Copyright (C) 2014 J.F.Dockes
+ *	 This program 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.
+ *
+ *	 This program 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 this program; if not, write to the
+ *	 Free Software Foundation, Inc.,
+ *	 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+
+#include <string>
+#include <iostream>
+#include <sstream>
+#include <vector>
+#include <functional>
+#include <set>
+using namespace std;
+using namespace std::placeholders;
+
+#include "libupnpp/upnpplib.hxx"
+#include "libupnpp/soaphelp.hxx"
+#include "libupnpp/device.hxx"
+#include "libupnpp/log.hxx"
+
+#include "upmpd.hxx"
+#include "ohplaylist.hxx"
+#include "mpdcli.hxx"
+#include "upmpdutils.hxx"
+#include "rendering.hxx"
+
+static const string sTpProduct("urn:av-openhome-org:service:Playlist:1");
+static const string sIdProduct("urn:av-openhome-org:serviceId:Playlist");
+
+OHPlaylist::OHPlaylist(UpMpd *dev, UpMpdRenderCtl *ctl)
+    : UpnpService(sTpProduct, sIdProduct, dev), m_dev(dev), m_ctl(ctl)
+{
+}
+
+bool OHPlaylist::makestate(unordered_map<string, string> &st)
+{
+    st.clear();
+
+    return true;
+}
+
+bool OHPlaylist::getEventData(bool all, std::vector<std::string>& names, 
+                            std::vector<std::string>& values)
+{
+    LOGDEB("OHPlaylist::getEventData" << endl);
+
+    unordered_map<string, string> state;
+    makestate(state);
+
+    unordered_map<string, string> changed;
+    if (all) {
+        changed = state;
+    } else {
+        changed = diffmaps(m_state, state);
+    }
+    m_state = state;
+
+    for (unordered_map<string, string>::iterator it = changed.begin();
+         it != changed.end(); it++) {
+        names.push_back(it->first);
+        values.push_back(it->second);
+    }
+
+    return true;
+}
+