From b1f5e9f48c0262f758ab17b3d58f4d0cf1b4f958 Mon Sep 17 00:00:00 2001
From: Harald Barth <haba@kth.se>
Date: Tue, 21 Jun 2022 15:04:45 +0200
Subject: [PATCH] Initial version

---
 log2lrc.py | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 log2lrc.py

diff --git a/log2lrc.py b/log2lrc.py
new file mode 100755
index 0000000..1f24338
--- /dev/null
+++ b/log2lrc.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+#
+#  Copyright 2022 Harald Barth
+#
+#  This converts serial logs with timestamps from the
+#  Arduino IDE to LRC format.
+#
+#  This 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 of the License, or
+#  (at your option) any later version.
+#
+#  It 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 CommandStation.  If not, see <https://www.gnu.org/licenses/>.
+
+# Usage: log2lrc.py HH:MM:SS HH:MM:SS filename
+#                   logtime  videotime
+# The resulting timestamps will be adjusted by logtime - videotime.
+# logtime > videotime
+
+import sys
+import datetime
+import fileinput
+import re
+
+timediff = datetime.datetime.strptime('00:00:00','%H:%M:%S')
+
+def convert(timestr):
+    times=timestr.split('.',1) # remove fractions of second
+    timestamp_obj=datetime.datetime.strptime(times[0],'%H:%M:%S')
+    timestamp_obj=timestamp_obj-timediff       # calculate offset
+    timestr='{0:%H:%M:%S}'.format(timestamp_obj)
+    timestr='%s.%s' % (timestr, times[1][0:2]) # add fractions of second, 2 digits
+    return timestr
+
+def main(argv):
+    global timediff
+    fromtime_str=sys.argv[1]
+    fromtime_obj=datetime.datetime.strptime(fromtime_str,'%H:%M:%S')
+    totime_str=sys.argv[2]
+    totime_obj=datetime.datetime.strptime(totime_str,'%H:%M:%S')
+    sys.argv=sys.argv[2:]
+    
+
+    timediff = fromtime_obj - totime_obj 
+
+    for line in fileinput.input():
+        line = re.split('\s+', line, 1)
+        if (len(line) > 1 and len(line[1]) > 1):
+            l = line[1].replace('\n','')
+            l = l.replace('\r','')
+            l = re.sub('^-> ','',l)
+            print("[%s]%s" % (convert(line[0]),l))
+
+if __name__ == "__main__":
+    main(sys.argv)
+