Merge pull request #134 from big97kai/timestamp

Fix .e2e timestamp
marksgraham · Feb 7, 2024 · 86839e1 · 86839e1
2 parents 1b93b31 + 013f25d
commit 86839e1
Showing 1 changed file with 12 additions and 7 deletions.
diff --git a/oct_converter/readers/e2e.py b/oct_converter/readers/e2e.py
@@ -1,8 +1,9 @@
 from __future__ import annotations
 
+import time
 import warnings
 from collections import defaultdict
-from datetime import date, datetime, timedelta
+from datetime import date
 from itertools import chain
 from pathlib import Path
 
@@ -145,14 +146,18 @@ def _make_lut():
                 elif chunk.type == 10004:  # bscan metadata
                     raw = f.read(104)
                     bscan_metadata = e2e_binary.bscan_metadata.parse(raw)
-                    start_epoch = datetime(
-                        year=1600, month=12, day=31, hour=23, minute=59
-                    )
-                    acquisition_datetime = start_epoch + timedelta(
-                        seconds=bscan_metadata.acquisitionTime * 1e-7
+
+                    windowsTicks = bscan_metadata.acquisitionTime
+                    windowsTicksToUnixFactor = 10000000
+                    secToUnixEpechFromWindowsTicks = 11644473600
+                    unixtime = (
+                        windowsTicks / windowsTicksToUnixFactor
+                        - secToUnixEpechFromWindowsTicks
                     )
+                    utc_time = time.gmtime(unixtime)
+                    utc_time_string = time.strftime("%Y-%m-%d %H:%M:%S", utc_time)
                     if self.acquisition_date is None:
-                        self.acquisition_date = acquisition_datetime.date()
+                        self.acquisition_date = utc_time_string
                     if self.pixel_spacing is None:
                         # scaley found, x and z not yet found in file
                         # but taken from E2E reader settings