From 1e4c0f261e00f67b0ac442a26ba581d4a1e4ed28 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Thu, 15 Feb 2018 11:07:45 +0100
Subject: Add timestamp of frame 0 to statistics

---
 src/TimestampDecoder.cpp | 27 ++++++++++++++++++++++++++-
 src/TimestampDecoder.h   |  3 +++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/TimestampDecoder.cpp b/src/TimestampDecoder.cpp
index b942c37..4aaaf67 100644
--- a/src/TimestampDecoder.cpp
+++ b/src/TimestampDecoder.cpp
@@ -2,7 +2,7 @@
    Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the
    Queen in Right of Canada (Communications Research Center Canada)
 
-   Copyright (C) 2017
+   Copyright (C) 2018
    Matthias P. Braendli, matthias.braendli@mpb.li
 
     http://opendigitalradio.org
@@ -46,6 +46,7 @@ TimestampDecoder::TimestampDecoder(double& offset_s) :
 
     RC_ADD_PARAMETER(offset, "TIST offset [s]");
     RC_ADD_PARAMETER(timestamp, "FCT and timestamp [s]");
+    RC_ADD_PARAMETER(timestamp0, "Timestamp of frame with FCT=0 [s]");
 
     etiLog.level(info) << "Setting up timestamp decoder with " <<
         timestamp_offset << " offset";
@@ -163,6 +164,11 @@ void TimestampDecoder::updateTimestampEti(
     pushMNSCData(framephase, mnsc);
     latestFCT = fct;
     latestFP = framephase;
+
+    if (full_timestamp_received and fct == 0) {
+        time_secs_of_frame0 = time_secs;
+        time_pps_of_frame0 = time_pps;
+    }
 }
 
 void TimestampDecoder::updateTimestampEdi(
@@ -176,6 +182,11 @@ void TimestampDecoder::updateTimestampEdi(
     latestFCT = fct;
     latestFP = framephase;
     full_timestamp_received = true;
+
+    if (fct == 0) {
+        time_secs_of_frame0 = time_secs;
+        time_pps_of_frame0 = time_pps;
+    }
 }
 
 void TimestampDecoder::set_parameter(
@@ -194,6 +205,9 @@ void TimestampDecoder::set_parameter(
     else if (parameter == "timestamp") {
         throw ParameterError("timestamp is read-only");
     }
+    else if (parameter == "timestamp0") {
+        throw ParameterError("timestamp0 is read-only");
+    }
     else {
         stringstream ss_err;
         ss_err << "Parameter '" << parameter
@@ -221,6 +235,17 @@ const std::string TimestampDecoder::get_parameter(
             throw ParameterError("Not available yet");
         }
     }
+    else if (parameter == "timestamp0") {
+        if (full_timestamp_received) {
+            ss.setf(std::ios_base::fixed, std::ios_base::floatfield);
+            ss << time_secs_of_frame0 +
+                ((double)time_pps_of_frame0 / 16384000.0) <<
+                " for frame FCT 0";
+        }
+        else {
+            throw ParameterError("Not available yet");
+        }
+    }
     else {
         ss << "Parameter '" << parameter <<
             "' is not exported by controllable " << get_rc_name();
diff --git a/src/TimestampDecoder.h b/src/TimestampDecoder.h
index 0411f1a..31c8bec 100644
--- a/src/TimestampDecoder.h
+++ b/src/TimestampDecoder.h
@@ -165,6 +165,9 @@ class TimestampDecoder : public RemoteControllable
         int inhibit_second_update = 0;
         bool offset_changed = false;
 
+        uint32_t time_secs_of_frame0 = 0;
+        uint32_t time_pps_of_frame0 = 0;
+
         /* When the type or identifier don't match, the decoder must
          * be disabled
          */
-- 
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