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+// -*- C++ -*-
+
+// $Id$
+/*
+ * Copyright (c) 1995 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the Network Research
+ * Group at Lawrence Berkeley National Laboratory.
+ * 4. Neither the name of the University nor of the Laboratory may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef TAO_AV_NTP_TIME_H
+#define TAO_AV_NTP_TIME_H
+#include /**/ "ace/pre.h"
+
+#include "orbsvcs/AV/RTCP.h"
+
+/*
+ * convert microseconds to fraction of second * 2^32 (i.e., the lsw of
+ * a 64-bit ntp timestamp). This routine uses the factorization
+ * 2^32/10^6 = 4096 + 256 - 1825/32 which results in a max conversion
+ * error of 3 * 10^-7 and an average error of half that.
+ */
+ACE_INLINE u_int usec2ntp(u_int usec)
+{
+ u_int const t = (usec * 1825) >> 5;
+ return ((usec << 12) + (usec << 8) - t);
+}
+
+/*
+ * Number of seconds between 1-Jan-1900 and 1-Jan-1970
+ */
+const ACE_UINT32 GETTIMEOFDAY_TO_NTP_OFFSET = 2208988800U;
+
+/*
+ * Return a 64-bit ntp timestamp (UTC time relative to Jan 1, 1970).
+ * gettimeofday conveniently gives us the correct reference -- we just
+ * need to convert sec+usec to a 64-bit fixed point (with binary point
+ * at bit 32).
+ */
+ACE_INLINE TAO_AV_RTCP::ntp64
+ntp64time (timeval tv)
+{
+ TAO_AV_RTCP::ntp64 n;
+ n.upper = (u_int)tv.tv_sec + GETTIMEOFDAY_TO_NTP_OFFSET;
+ n.lower = usec2ntp((u_int)tv.tv_usec);
+ return (n);
+}
+
+ACE_INLINE ACE_UINT32
+ntptime (timeval t)
+{
+ u_int s = (u_int)t.tv_sec + GETTIMEOFDAY_TO_NTP_OFFSET;
+ return (s << 16 | usec2ntp((u_int)t.tv_usec) >> 16);
+}
+
+ACE_INLINE ACE_UINT32
+ntptime()
+{
+ //
+ ACE_Time_Value tim_v = ACE_OS::gettimeofday();
+ //struct timeval tv = (timeval) tim_v;
+ return (ntptime ((timeval) tim_v));
+}
+
+ACE_INLINE timeval unixtime()
+{
+ ACE_Time_Value tv = ACE_OS::gettimeofday();
+ return ((timeval) tv);
+}
+#include /**/ "ace/post.h"
+#endif /* TAO_AV_NTP_TIME_H */