Merged VRT work-in-progress from eb/vrt2 (11518:11598) into trunk.

Passes distcheck.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@11600 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 57 insertions, 0 deletions

diff --git a/gr-vrt/src/missing_pkt_checker.h b/gr-vrt/src/missing_pkt_checker.h
new file mode 100644
index 000000000..ab171ffa3
--- /dev/null
+++ b/gr-vrt/src/missing_pkt_checker.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef INCLUDED_MISSING_PKT_CHECKER_H
+#define INCLUDED_MISSING_PKT_CHECKER_H
+
+#include <vrt/expanded_header.h>
+#include <stdint.h>
+
+/*!
+ * \brief Check for missing packets
+ */
+class missing_pkt_checker
+{
+  // FIXME assumes we're inspecting only a single stream
+
+  bool		d_resync;
+  uint64_t	d_npackets;		//< total number of packets
+  int		d_last_pkt_cnt;		//< the last pkt_cnt we saw
+  uint64_t	d_nwrong_pkt_cnt; 	//< number of incorrect pkt_cnt
+  uint64_t	d_nmissing_pkt_est;    	//< estimate of total number of missing pkts
+  
+public:
+  missing_pkt_checker()
+    : d_resync(true), d_npackets(0), d_last_pkt_cnt(0xf), d_nwrong_pkt_cnt(0),
+      d_nmissing_pkt_est(0) {}
+    
+  /*!
+   * \brief check header pkt_cnt and return 0 if OK, else estimate of number of missing packets.
+   */
+  int check(const vrt::expanded_header *hdr);
+
+  void resync() { d_resync = true; }
+  uint64_t npackets() const { return d_npackets; }
+  uint64_t nwrong_pkt_cnt() const { return d_nwrong_pkt_cnt; }
+  uint64_t nmissing_pkt_est() const { return d_nmissing_pkt_est; }
+};
+
+
+#endif /* INCLUDED_MISSING_PKT_CHECKER_H */