1 files changed, 95 insertions, 0 deletions
diff --git a/TAO/orbsvcs/orbsvcs/AV/media_timer.cpp b/TAO/orbsvcs/orbsvcs/AV/media_timer.cpp
new file mode 100644
index 00000000000..1a5b9cd1e42
--- /dev/null
+++ b/TAO/orbsvcs/orbsvcs/AV/media_timer.cpp
@@ -0,0 +1,95 @@
+//$Id$
+/*
+ * Copyright (c) 1995 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 Computer Systems
+ *      Engineering Group at Lawrence Berkeley 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.
+ */
+
+/*
+static const char rcsid[] =
+    "@(#) $Header$";
+*/
+
+#include "orbsvcs/AV/media_timer.h"
+#include "ace/Time_Value.h"
+#include "ace/OS_NS_sys_time.h"
+#include "ace/OS_NS_stdlib.h"
+
+TAO_BEGIN_VERSIONED_NAMESPACE_DECL
+
+MediaTimer* MediaTimer::instance_;
+
+MediaTimer::MediaTimer()
+{
+        instance_ = this;
+        offset_ = ACE_OS::rand ();
+}
+
+MediaTimer::~MediaTimer()
+{
+        instance_ = 0;
+}
+
+/*
+ * Default media timestamp -- convert unix system clock
+ * into a 90Khz timestamp.  Grabbers override this virtual
+ * method if they can provide their own time base.
+ *
+ * XXX
+ * We save the corresponding unix time stamp to handle the
+ * unix_ts() call the transmitter will make to get the correspondence
+ * between the media timestamp & unix time.
+ */
+ACE_UINT32 MediaTimer::media_ts()
+{
+  //timeval tv;
+  ACE_Time_Value tv = ACE_OS::gettimeofday();
+  ACE_UINT32 u = tv.usec ();
+  u = (u << 3) + u; /* x 9 */
+        /* sec * 90Khz + (usec * 90Khz) / 1e6 */
+        u = tv.sec () * 90000 + (u / 100);
+        return (u + offset_);
+}
+
+/*
+ * compute media time corresponding to the current unix time.
+ * in this generic routine, this is the same as media_ts() but,
+ * if a grabber has hardware or kernel timestamping, this routine
+ * must compute the correspondence between the hardware timestamp
+ * and the unix clock and appropriately offset the timestamp to
+ * correspond to the current clock.  (This information if vital
+ * for cross-media synchronization.)
+ */
+ACE_UINT32 MediaTimer::ref_ts()
+{
+        return (media_ts());
+}
+
+TAO_END_VERSIONED_NAMESPACE_DECL