--- a
+++ b/libupnpp/upnpavutils.cxx
@@ -0,0 +1,50 @@
+/* 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 <string>
+using namespace std;
+
+#include "libupnpp/upnpavutils.hxx"
+
+// Format duration in milliseconds into UPnP duration format
+string upnpduration(int ms)
+{
+ int hours = ms / (3600 * 1000);
+ ms -= hours * 3600 * 1000;
+ int minutes = ms / (60 * 1000);
+ ms -= minutes * 60 * 1000;
+ int secs = ms / 1000;
+ ms -= secs * 1000;
+
+ char cbuf[100];
+
+ // This is the format from the ref doc, but it appears that the
+ // decimal part in the seconds field is an issue with some control
+ // points. So drop it...
+ // sprintf(cbuf, "%d:%02d:%02d.%03d", hours, minutes, secs, ms);
+ sprintf(cbuf, "%d:%02d:%02d", hours, minutes, secs);
+ return cbuf;
+}
+
+// H:M:S to seconds
+int upnpdurationtos(const string& dur)
+{
+ int hours, minutes, seconds;
+ if (sscanf(dur.c_str(), "%d:%d:%d", &hours, &minutes, &seconds) != 3) {
+ return 0;
+ }
+ return 3600 * hours + 60 * minutes + seconds;
+}